Rotor impeller magnetic steel and fixed plate press fitting device applied to brushless fan

Abstract

A rotor impeller magnet and fixed plate pressing device for brushless fans includes a positioning seat, a pressing fixture, and an actuating mechanism. The positioning seat enables precise positioning of the rotor impeller. The pressing fixture consists of a base and a pressure cover, with multiple circumferentially distributed push blocks that can slide radially back and forth. The outer wall has corresponding pressing grooves for the fixed plates and magnet limiting claws. The push blocks are provided with a reset force by a first elastic element. The actuating mechanism includes a pressure cylinder and a pressing module. During operation, the magnets and fixed plates are pre-positioned. The pressing module drives the pressure cylinder downward and synchronously drives all push blocks to extend radially, pressing multiple fixed plates into the gaps between the magnets at once. After pressing, the push blocks automatically reset. This solution achieves synchronous automatic pressing of magnets and fixed plates, effectively improving assembly accuracy and product consistency, significantly increasing production efficiency, reducing manual labor intensity and assembly defect rate, and is suitable for automated mass production of brushless fan rotor impellers.

Description

Technical Field

[0001] This invention relates to brushless fan assembly technology, specifically to a rotor impeller magnet and fixing plate pressing device used in brushless fans. Background Technology

[0002] Brushless fans are widely used in automotive air conditioning systems and new energy vehicles. As the core component of the fan, the assembly quality of the rotor impeller directly determines the fan's operational stability and service life. Rotor impeller assembly requires the uniform circumferential arrangement of multiple magnets, with fixing plates pressed into the gaps between adjacent magnets to achieve magnet positioning and fastening.

[0003] Currently, the assembly of rotor impeller magnets and fixed plates is mostly done manually: first, the magnets are initially placed into the impeller assembly cavity, then tools are used to widen the gap between the magnets, and finally the fixed plates are manually inserted and hammered in to compact them. This method has three major technical drawbacks:

[0004] Manual assembly relies on operator experience, making it difficult to uniformly press the fixing plates in the correct position and with consistent force. This results in uneven gaps between magnets, poor product consistency, and a pass rate of only about 93.8%.

[0005] Only one fixing piece can be pressed in at a time, requiring repeated operations, resulting in low assembly efficiency and high labor intensity;

[0006] Manual hammering can easily cause the magnet to crack and the impeller to deform, resulting in many quality problems and making it difficult to meet the stability requirements of large-scale mass production.

[0007] Therefore, developing a magnet and fixing plate pressing device that can be synchronously pressed, accurately positioned, and highly automated has become an urgent technical problem to be solved in this field. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotor impeller magnet and fixed plate pressing device for use in brushless fans, so as to realize the synchronous positioning and automatic pressing of the magnet and fixed plate, and solve the problems of low efficiency, unstable quality and poor consistency of manual assembly.

[0009] To achieve the above and other related objectives, the technical solution provided by this invention is: a rotor impeller magnet and fixed plate pressing device applied in a brushless fan, comprising:

[0010] Positioning seat, used to position the impeller;

[0011] A press-fit fixture includes a cylindrical mounting base that can be coaxially inserted into the impeller magnet assembly cavity. The mounting base has multiple sets of push blocks arranged at equal angles along the circumference and capable of reciprocating in the radial direction. The outer wall of the mounting base has a fixing plate pressing groove corresponding to each push block. The outer end of each push block is configured to insert into the fixing plate pressing groove and push the fixing plate out radially. The inner end of each push block extends out of the inner wall of the mounting base and serves as an actuating structure for the radial sliding of the slider. The outer wall of the mounting base also has magnet limiting claws corresponding to each fixing plate pressing groove.

[0012] An actuation mechanism includes a pressure cylinder and a pressing module. The pressure cylinder is driven by the pressing module to insert into the inner ring of the mounting base. The pressure cylinder is configured to simultaneously actuate multiple sets of push blocks during insertion into the inner ring of the mounting base, pushing multiple fixing pieces radially out synchronously into the insertion space between adjacent magnets, which is limited by the magnet limiting claws.

[0013] The preferred technical solution is as follows: the mounting base is composed of a cylindrical base body and an annular pressure cap. The top of the base body has a plurality of sliding grooves arranged at equal angles along the circumference. The push block is restricted to sliding radially in the sliding grooves. The fixing plate pressing groove is formed on the outer wall of the base body and communicates with the sliding grooves one by one. The inner wall of the base body is provided with a plurality of through grooves for the push block to extend at least partially. The pressure cap is placed on the top of the base body. The magnetic steel limiting claw is formed on the outer periphery of the pressure cap and is arranged one by one with the fixing plate pressing groove.

[0014] The preferred technical solution is as follows: the push block includes a block-shaped main body, a sheet-shaped pressing part formed at the outer end of the main body, and an arc-shaped actuating part formed at the inner end of the main body. The main body is slidably disposed in the sliding groove along the radial direction. The pressing part is correspondingly disposed with the fixing sheet pressing groove and can be inserted into the fixing sheet pressing groove. The actuating part extends out of the inner wall of the seat through the through groove.

[0015] The preferred technical solution is as follows: a first elastic element is provided in the slide groove, one end of the first elastic element abuts against the inner wall of the slide groove, and the other end abuts against the main body, and the first elastic element applies a radially inward force to the push block.

[0016] The preferred technical solution is that the bottom end of the pressure cylinder is configured as a conical guide structure.

[0017] A preferred technical solution is that the top side of the pressure cap is provided with a handle.

[0018] The preferred technical solution is as follows: the press-fitting module consists of a base plate, a top plate, guide pillars, guide sleeves, a movable plate, and a hydraulic cylinder. The base plate is fixedly installed, and multiple guide pillars are vertically fixed on the base plate. The top plate is fixed on the top of multiple guide pillars. The guide sleeves are fitted onto the guide pillars one by one. The movable plate is fixedly connected to the guide sleeves and moves up and down with the guide sleeves. The hydraulic cylinder is fixed on the top plate and is used to drive the movable plate to move up and down. The positioning seat is fixed on the base plate, and the pressure cylinder is fixed on the bottom side of the movable plate and is vertically opposite to the positioning seat.

[0019] A preferred technical solution is as follows: a pressure rod corresponding to the positioning seat and capable of moving up and down is provided on the movable plate; a first limiting block is provided at the top of the pressure rod; a second limiting block is provided at the bottom of the pressure rod; a second elastic element is sleeved on the pressure rod; one end of the second elastic element abuts against the bottom side of the movable plate; and the other end of the second elastic element abuts against the second limiting block.

[0020] Due to the application of the above technical solution, the beneficial effects of this invention are as follows:

[0021] Significantly improved quality: Multiple sets of fixing plates are pressed synchronously, ensuring precise positioning and uniform force distribution. There is no misalignment or damage between the magnet and the fixing plates, resulting in a high product qualification rate.

[0022] Significantly improved efficiency: All fixing plates are pressed in a single operation, eliminating the need for repeated operations, doubling production efficiency and making it suitable for large-scale mass production;

[0023] Reduce labor intensity: Automated press fitting replaces manual hammering and assembly, reducing human error and ensuring product consistency;

[0024] Stable and reliable structure: The magnetic steel limit claw accurately positions the magnetic steel, and the elastic reset structure ensures smooth circulation of the push block. The device has a long service life and is easy to maintain. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the pressing device involved in this invention.

[0026] Figure 2 This is a schematic diagram of the overall structure of the press-fitting fixture involved in this invention.

[0027] Figure 3 This is a schematic diagram of the internal structure of the press-fitting fixture involved in this invention.

[0028] Figure 4 This is a schematic diagram of the impeller, positioning seat, and press-fitting fixture in the assembled state according to the present invention.

[0029] Figure 5 This is a schematic diagram of the pusher structure involved in the present invention. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0031] Please see Figures 1-5 It should be noted that in the description of this invention, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example:

[0034] like Figures 1 to 3 As shown, according to a general technical concept of the present invention, a rotor impeller magnet and fixed plate pressing device for use in a brushless fan is provided, including a positioning seat 1, a pressing fixture 2, and an actuation mechanism; the positioning seat 1 adopts a contour-following structure to precisely engage the rotor impeller 100; the pressing fixture 2 includes a cylindrical mounting seat, which is assembled from a cylindrical seat body 21 and an annular pressure cover 22. The top of the seat body 21 has eight sets of circumferentially equidistantly distributed sliding grooves 211, and a radially sliding push block 23 is installed in the sliding grooves 211; the outer wall of the seat body 21 is formed with a fixed plate pressing groove 212 communicating with the sliding groove 211, and the inner wall is formed with a through groove 213 for the inner end of the push block 23 to extend out; the outer circumference of the pressure cover 22 is integrally formed with eight sets of magnet limiting claws 221, which correspond one-to-one with the fixed plate pressing groove 212.

[0035] like Figure 5 As shown, the push block 23 includes a block-shaped main body 231, a sheet-shaped pressing part 232, and an arc-shaped actuating part 233; the main body 231 is slidably disposed in the slide groove 211, and a first elastic element 24 (spring) is installed in the slide groove 211 to provide radial restoring force for the push block 23; the pressing part 231 can be inserted into the fixing plate pressing groove 212 to push out the fixing plate, and the actuating part 233 extends out of the through groove 213 to receive the actuating force of the pressure cylinder 31.

[0036] like Figure 1 As shown, the actuation mechanism includes a pressure cylinder 31 and a pressing module 32; the bottom end of the pressure cylinder 31 has a conical guide structure, which facilitates precise insertion into the inner ring of the mounting base 21; the pressing module 32 consists of a base plate 321, a top plate 322, guide pillars 323, guide sleeves 324, a movable plate 325, and a hydraulic cylinder 326. The base plate 321 is fixedly installed, multiple guide pillars 323 are vertically fixed on the base plate 321, the top plate 322 is fixed on the top of the multiple guide pillars 323, the guide sleeves 324 are fitted onto the guide pillars 323 one by one, the movable plate 325 is fixedly connected to the guide sleeves 324 and moves up and down with the guide sleeves 324, the hydraulic cylinder 326 is fixed on the top plate 322 and is used to drive the movable plate 325 to move up and down; the positioning seat 1 is fixed on the base plate 321, and the pressure cylinder 31 is fixed on the bottom side of the movable plate 325 and is vertically opposite to the positioning seat 1. A pressure rod 41 is installed on the movable plate 325, and a second elastic element 42 (spring) is sleeved on the pressure rod 41 to achieve pre-pressure buffering and avoid rigid impact damage to the workpiece.

[0037] Work process:

[0038] Feeding: Place the rotor impeller into the positioning seat 1 for fixation, place the magnet 200 along the magnet limiting claw 221 for positioning, and place the fixing plate 300 into the fixing plate pressing groove 212;

[0039] Start-up: Hydraulic cylinder 326 drives movable plate 325 to move down along guide post 323, pressure cylinder 31 moves down synchronously, and conical guide structure is inserted into inner ring of mounting base 21;

[0040] Pressing: The inner wall of the pressing cylinder 31 presses the arc-shaped actuating part 233 of the push block 23, and the push block 23 moves radially outward against the elastic force of the first elastic element 24. The pressing part 231 presses the fixing piece 300 into the gap between the adjacent magnets 200 simultaneously.

[0041] Reset: The hydraulic cylinder 326 drives the pressure cylinder 31 to move upward, and the push block 23 is reset under the action of the first elastic element 24, so that the workpiece can be taken out and the assembly is completed.

[0042] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A device for pressing rotor impeller magnets and fixed plates in brushless fans, characterized in that, include: Positioning seat, used to position the impeller; A press-fit fixture includes a cylindrical mounting base that can be coaxially inserted into the impeller magnet assembly cavity. The mounting base has multiple sets of push blocks arranged at equal angles along the circumference and capable of reciprocating in the radial direction. The outer wall of the mounting base has a fixing plate pressing groove corresponding to each push block. The outer end of each push block is configured to insert into the fixing plate pressing groove and push the fixing plate out radially. The inner end of each push block extends out of the inner wall of the mounting base and serves as an actuating structure for the radial sliding of the slider. The outer wall of the mounting base also has magnet limiting claws corresponding to each fixing plate pressing groove. An actuation mechanism includes a pressure cylinder and a pressing module. The pressure cylinder is driven by the pressing module to insert into the inner ring of the mounting base. The pressure cylinder is configured to simultaneously actuate multiple sets of push blocks during insertion into the inner ring of the mounting base, pushing multiple fixing pieces radially out synchronously into the insertion space between adjacent magnets, which is limited by the magnet limiting claws.

2. The rotor impeller magnet and fixed plate pressing device applied in a brushless fan according to claim 1, characterized in that: The mounting base consists of a cylindrical base body and an annular pressure cap. The top of the base body has multiple sliding grooves arranged at equal angles along the circumference. The push block is restricted to sliding radially within the sliding grooves. The fixing plate pressing groove is formed on the outer wall of the base body and communicates with each of the sliding grooves. The inner wall of the base body has multiple through grooves for at least part of the push block to extend out. The pressure cap is placed on the top of the base body. The magnetic limiting claw is formed on the outer periphery of the pressure cap and corresponds to each of the fixing plate pressing grooves.

3. The rotor impeller magnet and fixed plate pressing device applied in a brushless fan according to claim 2, characterized in that: The pusher includes a block-shaped main body, a sheet-shaped pressing part formed at the outer end of the main body, and an arc-shaped actuating part formed at the inner end of the main body. The main body is radially slidably disposed in the sliding groove. The pressing part is correspondingly disposed with the fixing piece pressing groove and can be inserted into the fixing piece pressing groove. The actuating part extends out of the inner wall of the seat through the through groove.

4. The rotor impeller magnet and fixed plate pressing device applied in a brushless fan according to claim 3, characterized in that: The slide groove is provided with a first elastic element. One end of the first elastic element abuts against the inner wall of the slide groove, and the other end abuts against the main body. The first elastic element applies a radially inward force to the push block.

5. The rotor impeller magnet and fixed plate pressing device applied in a brushless fan according to claim 1, characterized in that: The bottom end of the pressure cylinder is configured as a conical guide structure.

6. The rotor impeller magnet and fixed plate pressing device applied in a brushless fan according to claim 2, characterized in that: The top side of the cap is provided with a handle.

7. The rotor impeller magnet and fixed plate pressing device applied in a brushless fan according to claim 1, characterized in that: The press-fitting module consists of a base plate, a top plate, guide pillars, guide sleeves, a movable plate, and a hydraulic cylinder. The base plate is fixedly installed, and multiple guide pillars are vertically fixed to the base plate. The top plate is fixed to the top of the multiple guide pillars. The guide sleeves are fitted onto the guide pillars one by one. The movable plate is fixedly connected to the guide sleeves and moves up and down with the guide sleeves. The hydraulic cylinder is fixed to the top plate and is used to drive the movable plate to move up and down. The positioning seat is fixed to the base plate, and the pressure cylinder is fixed to the bottom side of the movable plate and is vertically opposite to the positioning seat.

8. The rotor impeller magnet and fixed plate pressing device applied in a brushless fan according to claim 7, characterized in that: The movable plate is provided with a pressure rod that corresponds to the positioning seat and can move up and down. The top end of the pressure rod is provided with a first limiting block, and the bottom end of the pressure rod is provided with a second limiting block. A second elastic element is sleeved on the pressure rod. One end of the second elastic element abuts against the bottom side of the movable plate, and the other end of the second elastic element abuts against the second limiting block.

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