Permanent magnet brushless inner rotor evaporative fan rotor press bearing tooling
By designing and coordinating components such as guide posts, positioning clamps, and limiting posts, the synchronous movement of the rotor core backrest is achieved, solving the accuracy and compatibility issues during the press-fitting of permanent magnet brushless DC motors, and improving press-fitting accuracy and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU SHUANGHANG ELECTRICAL CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-08-04
AI Technical Summary
Existing press-fitting fixtures for permanent magnet brushless DC motors cannot move the rotor core back when faced with rotors of special structures, resulting in poor press-fitting accuracy and adaptability, especially for long-shaft rotors.
A rotor bearing tooling for a permanent magnet brushless internal rotor evaporator fan was designed. Through the cooperation of components such as guide columns, positioning clamps, springs and limit columns, the synchronous movement of the rotor core backrest is achieved, ensuring the precise positioning and pressing of the ball bearing.
It improves pressing accuracy and production efficiency, solves the problem that traditional tooling cannot adapt to rotors with special structures, and ensures operational safety and product quality.
Smart Images
Figure CN224596319U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of permanent magnet brushless DC motor manufacturing, specifically to a bearing pressing fixture for the rotor of a permanent magnet brushless internal rotor evaporator fan, which is particularly suitable for solving the bearing pressing problem under special working conditions where the rotor core back needs to move with the pressing action. Background Technology
[0002] With the advancement of industrialization, permanent magnet brushed DC motors have been widely used in many economic sectors, and the number of companies producing this type of motor is constantly increasing. To improve the cost-effectiveness of permanent magnet brushed DC motors, manufacturers are continuously optimizing their production processes. The rotor assembly of an internal rotor motor mainly consists of rotor components and ball bearings, with the ball bearings fixed to both ends of the shaft using an interference fit.
[0003] Currently, there are two main types of ball bearing press fixtures on the market: vertical press-fit and horizontal press-fit. Vertical press-fit fixtures typically consist of an upper template, support components, a lower base plate, a rotor core fixing backing, an upper ball bearing press head, and a lower ball bearing base. However, when encountering rotors with special structural requirements in new states, the rotor core fixing backing cannot move during the press-fitting process; for long-shaft rotors, there is also the problem of fixture dimensions being too large to fit, resulting in traditional press-fitting methods failing to meet production needs.
[0004] To solve the above problems, it is urgent to design a permanent magnet brushless inner rotor evaporator fan rotor bearing press fixture with a rotor core backrest that can move synchronously with the press-fitting action, so as to adapt to the bearing press-fitting requirements of rotors with different structures and improve press-fitting accuracy and production efficiency. Utility Model Content
[0005] The purpose of this utility model is to provide a rotor bearing tooling for a permanent magnet brushless internal rotor evaporator fan, in order to solve the problems of existing tooling in pressing rotors with special structures where the iron core backrest cannot move and the adaptability of long-shaft rotors is poor. This tooling enables the rotor iron core backrest to move synchronously with the pressing action, thereby improving the pressing accuracy and reliability.
[0006] To achieve the above and other related objectives, the technical solution provided by this utility model is: a rotor pressure bearing fixture for a permanent magnet brushless internal rotor evaporator fan, comprising:
[0007] The lower base has multiple guide columns fixedly mounted on it, and each guide column has a positioning clamp at the same height. The lower base also has a rotating shaft top rod and a bearing top core sleeve fixedly mounted on it, with the bearing top core sleeve fitted around the circumference of the rotating shaft top rod.
[0008] A core backrest connecting plate is sleeved on multiple guide columns and located below the positioning clamp. A spring is sleeved on each guide column and located between the lower base and the core backrest connecting plate.
[0009] An upper pressure plate is sleeved on multiple guide columns and located on the upper side of the positioning clamp. A second spring is sleeved on the guide columns and located between the upper pressure plate and the iron core backrest connecting plate. A second rotating shaft top rod and a second bearing top core sleeve are also fixed on the bottom side of the upper pressure plate. The second bearing top core sleeve is sleeved on the periphery of the second rotating shaft top rod.
[0010] A downward pressure spring is fixed to the bottom side of the upper pressure plate and is correspondingly arranged with the iron core backrest connecting plate.
[0011] The preferred technical solution is as follows: the first rotating shaft push rod is configured as a barrel-shaped structure and has a push rod notch on one side for inserting the rotating shaft, which is used to position the bottom end of the rotating shaft; the first bearing top core sleeve is configured as a cylindrical structure and is coaxially sleeved on the outside of the first rotating shaft push rod, which is used to position the lower ball bearing; the first bearing top core sleeve has a top core sleeve notch on its side for inserting the rotating shaft, and the top core sleeve notch is correspondingly set with the push rod notch.
[0012] The preferred technical solution is as follows: the second rotating shaft top rod is configured as a barrel-shaped structure for positioning the top end of the rotating shaft; the second bearing top core sleeve is configured as a cylindrical structure and is coaxially sleeved on the outside of the second rotating shaft top rod for positioning the upper ball bearing.
[0013] The preferred technical solution is as follows: both the first bearing top sleeve and the second bearing top sleeve are provided with stepped holes for accommodating ball bearings at their ends, and the inner ring of the large diameter section of the stepped hole is embedded with a rubber ring for fixing the ball bearing.
[0014] The preferred technical solution is as follows: the downward pressing spring is composed of a guide sleeve, a downward pressing column and a spring. The guide sleeve is fixed to the bottom side of the upper pressure plate. The downward pressing column is slidably sleeved in the guide sleeve. The spring is sleeved on the downward pressing column. One end of the spring abuts against the bottom pressure block of the downward pressing column, and the other end abuts against the guide sleeve.
[0015] The preferred technical solution is as follows: it further includes a limiting post, which is fixed on the lower base and is correspondingly arranged with the iron core backrest connecting plate.
[0016] The preferred technical solution is as follows: it further includes a second limiting post, which is fixed on the lower base and correspondingly arranged with the lower pressure plate; the iron core backrest connecting plate is provided with a through hole for the second limiting post to pass through.
[0017] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows:
[0018] Structural safety and reliability: Through reasonable design and connection of each component, such as the cooperation of guide columns and positioning clamps, the pressing process is ensured to be stable, avoiding loosening or damage of components and ensuring operational safety.
[0019] Adaptable to special working conditions: The iron core backrest connecting plate can move with the pressing action, which solves the problem that traditional tooling cannot adapt to special structures where the rotor iron core backrest needs to move, and can meet the pressing requirements of special working conditions such as long shaft rotors.
[0020] High pressing accuracy: The precise positioning of the rotating shaft push rod and bearing core sleeve, as well as the coordinated action of components such as springs and limit pins, ensure the accuracy of ball bearing pressing, making the positioning dimensions more precise and improving product quality. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the tooling structure involved in this utility model.
[0022] Figure 2 This is a schematic diagram of the tooling involved in this utility model in the state of pre-installed workpiece.
[0023] Figure 3 This is a schematic diagram of the tooling involved in this utility model in the press-fit state. Detailed Implementation
[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0025] Please see Figures 1-3 It should be noted that in the description of this utility model, 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 utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component 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 this utility model. 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 rather that it 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.
[0026] In the description of this utility model, 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0027] Example:
[0028] like Figures 1 to 3 As shown, according to a general technical concept of this utility model, a rotor pressure bearing fixture for a permanent magnet brushless internal rotor evaporator fan is provided, comprising:
[0029] The lower base 1 has multiple guide columns 2 fixed on it, and each guide column 2 has a positioning clamp 3 at the same height. The lower base 1 also has a rotating shaft top rod (not shown) and a bearing top core sleeve 5 fixed on it. The bearing top core sleeve 5 is sleeved on the periphery of the rotating shaft top rod.
[0030] Iron core backrest connecting plate 6, iron core backrest connecting plate 6 is sleeved on multiple guide columns 2 and located on the lower side of positioning clamp 3, and spring 7 is sleeved on the guide columns 2, and spring 7 is located between the lower base 1 and iron core backrest connecting plate 6.
[0031] The upper pressure plate 8 is sleeved on multiple guide columns 2 and located on the upper side of the positioning clamp 3. The guide columns 2 are sleeved with spring 2 9, which is located between the upper pressure plate 8 and the iron core backrest connecting plate 6. The bottom side of the upper pressure plate 8 is also fixed with a rotating shaft top rod 2 (not shown) and a bearing top core sleeve 2 10, which is sleeved on the periphery of the rotating shaft top rod 2.
[0032] The lower pressure spring 11 is fixed to the bottom side of the upper pressure plate 8 and is correspondingly set with the iron core backrest connecting plate 6.
[0033] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, the rotating shaft push rod is configured as a barrel-shaped structure with a push rod notch on one side for inserting the rotating shaft, used to position the bottom end of the rotating shaft; the bearing top core sleeve 5 is configured as a cylindrical structure and coaxially sleeved on the outside of the rotating shaft push rod, used to position the lower ball bearing; the side of the bearing top core sleeve 5 is provided with a top core sleeve notch for inserting the rotating shaft, and the top core sleeve notch is correspondingly set with the push rod notch, which facilitates the insertion of the rotating shaft into the rotating shaft push rod for positioning.
[0034] like Figures 1 to 3As shown, in an exemplary embodiment of this utility model, the second rotating shaft top rod is configured as a barrel-shaped structure for positioning the top end of the rotating shaft; the second bearing top core sleeve 10 is configured as a cylindrical structure and is coaxially sleeved on the outside of the second rotating shaft top rod for positioning the upper ball bearing.
[0035] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, both the bearing top sleeve 5 and the bearing top sleeve 10 are provided with stepped holes for accommodating ball bearings at their ends, and a rubber ring for fixing the ball bearing is embedded in the inner ring of the large diameter section of the stepped hole.
[0036] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, the lower pressure spring 11 is composed of a guide sleeve, a lower pressure column and a spring 3. The guide sleeve is fixed to the bottom side of the upper pressure plate 8. The lower pressure column is slidably sleeved in the guide sleeve. The spring 3 is sleeved on the lower pressure column. One end of the spring 3 abuts against the bottom pressure block of the lower pressure column, and the other end abuts against the guide sleeve.
[0037] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, a limiting post 12 is also included. The limiting post 12 is fixed on the lower base 1 and is correspondingly arranged with the iron core backrest connecting plate 6.
[0038] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, a second limiting post 13 is also included. The second limiting post 13 is fixed on the lower base 1 and is correspondingly arranged with the lower pressure plate 8; the iron core backrest connecting plate 6 is provided with a through hole for the second limiting post 13 to pass through.
[0039] Therefore, this utility model has the following advantages:
[0040] This utility model proposes a bearing pressing fixture for a permanent magnet brushless internal rotor evaporator fan. Its advantages are that the structure is safe and reliable. It solves the problems of traditional fixtures not being able to move the iron core backrest when pressing a rotor with a special structure and the poor adaptability of long-shaft rotors. Through the cooperation of various components, high-precision bearing pressing is achieved, which improves pressing accuracy and production efficiency. It is suitable for solving the bearing pressing problem in special working conditions where the rotor iron core backrest needs to move with the pressing action.
[0041] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A permanent magnet brushless internal rotor evaporative fan rotor press bearing tooling characterized by, include: The lower base has multiple guide columns fixedly mounted on it, and each guide column has a positioning clamp at the same height. The lower base also has a rotating shaft top rod and a bearing top core sleeve fixedly mounted on it, with the bearing top core sleeve fitted around the circumference of the rotating shaft top rod. A core backrest connecting plate is sleeved on multiple guide columns and located below the positioning clamp. A spring is sleeved on each guide column and located between the lower base and the core backrest connecting plate. An upper pressure plate is sleeved on multiple guide columns and located on the upper side of the positioning clamp. A second spring is sleeved on the guide columns and located between the upper pressure plate and the iron core backrest connecting plate. A second rotating shaft top rod and a second bearing top core sleeve are also fixed on the bottom side of the upper pressure plate. The second bearing top core sleeve is sleeved on the periphery of the second rotating shaft top rod. A downward pressure spring is fixed to the bottom side of the upper pressure plate and is correspondingly arranged with the iron core backrest connecting plate.
2. A permanent magnet brushless inner rotor evaporative fan rotor press bearing tooling according to claim 1, characterized in that: The rotating shaft push rod is configured as a barrel-shaped structure and has a push rod notch on one side for inserting the rotating shaft, used to position the bottom end of the rotating shaft; the bearing top core sleeve is configured as a cylindrical structure and is coaxially sleeved on the outside of the rotating shaft push rod, used to position the lower ball bearing; the side of the bearing top core sleeve is provided with a top core sleeve notch for inserting the rotating shaft, and the top core sleeve notch is correspondingly set with the push rod notch.
3. A permanent magnet brushless inner rotor evaporative fan rotor press bearing tooling according to claim 1, wherein: The second rotating shaft top rod is configured as a barrel-shaped structure and is used to position the top of the rotating shaft; the second bearing top core sleeve is configured as a cylindrical structure and is coaxially sleeved on the outside of the second rotating shaft top rod and is used to position the upper ball bearing.
4. A permanent magnet brushless inner rotor evaporative fan rotor press bearing tooling according to claim 1, wherein: Both the first and second bearing top sleeves have stepped holes at their ends to accommodate ball bearings, and the inner ring of the large diameter section of the stepped hole is fitted with a rubber ring for fixing the ball bearing.
5. A permanent magnet brushless inner rotor evaporative fan rotor press bearing tooling according to claim 1, wherein: The downward pressing spring consists of a guide sleeve, a downward pressing column, and a spring. The guide sleeve is fixed to the bottom side of the upper pressure plate. The downward pressing column is slidably sleeved in the guide sleeve. The spring is sleeved on the downward pressing column. One end of the spring abuts against the bottom pressure block of the downward pressing column, and the other end abuts against the guide sleeve.
6. A permanent magnet brushless inner rotor evaporative fan rotor press bearing tooling according to claim 1, wherein: It also includes a limiting post, which is fixed on the lower base and is correspondingly arranged with the iron core backrest connecting plate.
7. A permanent magnet brushless inner rotor evaporative fan rotor press bearing tooling according to claim 1, wherein: It also includes a second limiting post, which is fixed on the lower base and corresponding to the upper pressure plate; the iron core backrest connecting plate is provided with a through hole for the second limiting post to pass through.