Interference flat key press-fitting equipment

Abstract

The utility model discloses interference flat key press-fitting equipment, belongs to the technical field of flat key press-fitting, and solves the problem that the existing manual interference flat key press-fitting process is easy to cause hidden damage to a stator core. According to the utility model, the inner ring surface of the stator iron core is supported through the positioning core disc, and the stress surface is changed from the outer ring surface to the inner ring surface, so that the stator iron core can transmit the pressure of the flat key to the positioning core disc more easily, and the invisible damage to the interior of the stator iron core is reduced to a great extent. Meanwhile, the flat keys are magnetically attracted through the flat key positioning grooves, so that the flat keys cannot fall off due to gravity after being placed, meanwhile, due to the fact that the magnetic force of the magnets is limited, the flat keys cannot move along with resetting of the tool after the press-fitting action is completed, the safety of the press-fitting process is improved, and meanwhile the press-fitting efficiency is improved. And the phenomenon that the flat key is inclined in the press-fitting process due to the installation error of manually placing the flat key is also avoided.

Description

Technical Field

[0001] This utility model relates to the field of flat key press-fitting technology, specifically to an interference flat key press-fitting device. Background Technology

[0002] The stator core is one of the core components of a motor, primarily functioning to form the magnetic circuit and support the windings. The existing process for press-fitting an interference key on the outer circumference of the stator core involves using the bottom outer ring surface of the stator core as a support surface and the end face of the stator core as an axial limiting surface. A rectangular slot on the stator core is used for circumferential positioning. The key is then manually placed into the keyway on the outer circumference of the stator core. After correct positioning, a pressure device is used to press the key into the keyway, creating an interference fit between the key and the keyway on the stator core.

[0003] However, during this process, because the bottom outer ring surface of the stator core is used as the support surface, the flat key pressing process can easily cause hidden damage to the inside of the stator core that is difficult to detect. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides an interference key press-fitting device, which solves the problem that the existing manual interference key press-fitting process easily causes hidden damage to the stator core.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An interference key press-fitting device is provided, including a positioning assembly, which includes a positioning core disk that fits against the inner ring surface of the stator core. The positioning core disk is vertically fixed on a support plate. A core positioning block and at least two limiting pins that contact the end face of the positioning core disk are fixed on the support plate. The core positioning block is provided with a positioning protrusion that inserts into a rectangular positioning groove in the stator core. A press-fitting assembly includes a cylinder fixed on the top of the stator core. A pressing plate is provided on the telescopic end of the cylinder. A key positioning block is provided at the bottom of the pressing plate. A key positioning groove that is magnetically connected to the key is provided at the bottom of the key positioning block.

[0007] The beneficial effects of this solution are as follows: By supporting the inner ring surface of the stator core with a positioning core plate, the stress surface is changed from the outer ring surface to the inner ring surface, which is more conducive to the stator core transmitting the pressure of the flat key to the positioning core plate, greatly reducing the hidden damage inside the stator core itself. At the same time, the flat key is magnetically attracted by the positioning groove, so that the flat key will not fall off due to gravity after placement. In addition, because the magnetic force of the magnet is limited, the flat key will not move as the tooling is reset after the pressing action. This improves the safety of the pressing process and avoids the phenomenon of flat key skewing caused by installation errors due to manual placement.

[0008] Furthermore, both ends of the support plate are fixedly connected to the base plate via upright plates, and the core positioning block is vertically fixed in the middle of the base plate. The centered fixing of the core positioning block ensures the circumferential positioning symmetry of the stator core.

[0009] Furthermore, a mandrel is located at the center of the positioning mandrel, and a rotating arm is hinged to the base plate. The free end of the rotating arm supports one end of the mandrel, while the other end of the mandrel is fixed to the support plate. The rotating arm facilitates the mounting of the positioning mandrel onto the positioning mandrel and also serves to support the positioning mandrel.

[0010] Furthermore, a limiting groove is provided at the bottom of the contact end between the mandrel and the rotating arm, and a bearing is provided on the free end of the rotating arm, with the outer ring of the bearing rollingly connected to the limiting groove. The rolling bearing converts sliding friction into rolling friction, reducing support resistance and improving the response speed and stability of the rotating arm.

[0011] Furthermore, both sides of the top of the support plate are fixedly connected to the top plate by uprights. A through hole is opened in the middle of the top plate. The cylinder is fixed on the top plate, and the telescopic end of the cylinder passes through the through hole and is fixedly connected to the pressing plate.

[0012] Furthermore, the telescopic end of the cylinder is fixedly connected to the pressure plate via a floating joint. The floating joint avoids the problem of pressure transmission not being on the same straight line due to machining errors of the parts, ensuring that the flat key is only subjected to vertically downward pressure.

[0013] Furthermore, the two sides of the pressing plate are fixed to guide posts, and both guide posts are slidably connected to the top plate via sliding bearings. The sliding bearings reduce frictional resistance.

[0014] Furthermore, a limit ring is fixed on each guide post. The limit ring limits the travel of the flat key and prevents over-pressing of the flat key.

[0015] Furthermore, a magnet is provided at the top of the key positioning groove in the key positioning block.

[0016] Furthermore, the positioning core plate is a disc-like structure with a notch at the bottom. The notch facilitates the installation of the positioning core onto the positioning core plate. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of an interference key press-fitting equipment;

[0018] Figure 2 A isometric drawing of an interference key press-fitting device;

[0019] Figure 3 This is a side view of the interference key press-fitting equipment;

[0020] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0021] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0022] The components include: 100, positioning assembly; 11, positioning core plate; 111, mandrel; 12, support plate; 13, iron core positioning block; 14, limit pin; 15, base plate; 16, rotating arm; and 161, bearing.

[0023] 200. Press-fit assembly; 21. Cylinder; 22. Press plate; 221. Floating joint; 23. Flat key positioning block; 231. Flat key positioning groove; 232. Magnet; 24. Guide post; 241. Limit ring; 25. Top plate;

[0024] 300. Stator core;

[0025] 400, flat key. Detailed Implementation

[0026] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0027] The existing manual interference key press-fit process uses the bottom outer ring surface of the stator core 300 as the support surface, which easily causes hidden damage to the inside of the stator core 300 that is difficult to detect during the press-fitting of the key 400. In order to solve this problem, this embodiment uses the positioning core plate 11 to support the inner ring surface of the stator core 300, changing the force-bearing surface from the outer ring surface to the inner ring surface. This is more conducive to the stator core 300 transmitting the pressure of the key 400 to the positioning core plate 11, thereby reducing the hidden damage inside the stator core 300 itself.

[0028] refer to Figure 1 and Figure 2 The interference key press-fitting equipment provided in this embodiment includes a positioning component 100 and a press-fitting component 200.

[0029] refer to Figure 1The positioning assembly 100 includes a positioning core disk 11, which is a disc-like structure with a notch at the bottom. The top of the positioning core disk 11 is in contact with the inner ring surface of the stator core 300. The positioning core disk 11 is vertically fixed on a support plate 12, and a core positioning block 13 and at least two limiting pins 14 that contact the end face of the positioning core disk 11 are fixed on the support plate 12. The core positioning block 13 is provided with a positioning protrusion, which is inserted into a rectangular positioning groove on the outer ring surface of the stator core 300. Preferably, in this embodiment, there are two limiting pins 14, which are symmetrically fixed on the support plate 12.

[0030] refer to Figure 2 The press-fit assembly 200 includes a cylinder 21 fixed to the top of the stator core 300. A pressing plate 22 is provided on the telescopic end of the cylinder 21. A flat key positioning block 23 is provided at the bottom of the pressing plate 22. A flat key positioning groove 231 is provided at the bottom of the flat key positioning block 23, and a magnet 232 is provided at the top of the flat key positioning groove 231 in the flat key positioning block 23. The flat key 400 is magnetically attracted by the flat key positioning groove 231, so that the flat key 400 will not fall off due to gravity after placement. At the same time, because the magnetic force of the magnet 232 is limited, the flat key 400 will not move as the tooling is reset after the press-fit action is completed. This improves the safety of the press-fit process and avoids the phenomenon of the flat key 400 being skewed during the press-fit process due to the installation error of the flat key 400 placed manually.

[0031] The specific connection structure between the support plate 12 and the iron core positioning block 13 can be found in the following reference. Figure 2 Both ends of the support plate 12 are fixedly connected to the base plate 15 via upright plates, and the core positioning block 13 is vertically fixed in the middle of the base plate 15. The core positioning block 13 is fixed in the center, which can ensure the circumferential symmetry of the stator core 300.

[0032] For the specific structure of the positioning core disk 11, please refer to Figure 2 A spindle 111 is located at the center of the positioning core disk 11. A rotating arm 16 is hinged to the base plate 15. The free end of the rotating arm 16 supports one end of the spindle 111, and the other end of the spindle 111 is fixed to the support plate 12. A limiting groove is provided at the bottom of the contact end between the spindle 111 and the rotating arm 16. A bearing 161 is provided on the free end of the rotating arm 16, and the outer ring of the bearing 161 is in rolling connection with the limiting groove. The rolling bearing 161 converts sliding friction into rolling friction, reducing support resistance and improving the response speed and stability of the rotating arm 16. The rotating arm 16 facilitates the mounting of the positioning core disk 11 and also supports the positioning core disk 11.

[0033] For the specific connection structure between cylinder 21 and support plate 12, please refer to Figure 3 and Figure 4The top two sides of the support plate 12 are fixedly connected to the top plate 25 by uprights. A through hole is opened in the middle of the top plate 25. The cylinder 21 is fixed on the top plate 25. The telescopic end of the cylinder 21 passes through the through hole and is fixedly connected to the pressing plate 22.

[0034] To ensure that the flat key 400 only experiences vertical downward pressure, refer to... Figure 5 The telescopic end of cylinder 21 is fixedly connected to pressure plate 22 via floating joint 221.

[0035] To prevent excessive pressing of the flat key 400, the two sides of the pressing plate 22 are fixed to guide posts 24, and both guide posts 24 are slidably connected to the top plate 25 via sliding bearings 161. Each guide post 24 is fixed with a limit ring 241. The limit ring 241 limits the stroke of the flat key 400.

[0036] The working principle of this solution is as follows:

[0037] S1. Place the flat key 400 into the flat key positioning groove 231 and use the magnet 232 to attract it.

[0038] S2. Rotate the rotating arm 16 to a horizontal position, hold the stator core 300 and place it on the positioning core plate 11, and make the end face of the stator core 300 contact the limiting pin 14, and insert the rectangular positioning groove on the bottom of the stator core 300 into the positioning protrusion on the core positioning block 13.

[0039] S3. Rotate the rotating arm 16 to a vertical position to support the spindle 111 of the positioning core disk 11;

[0040] S4. Start cylinder 21. Cylinder 21 transmits pressure to pressing plate 22 through floating joint 221. Pressing plate 22 drives flat key 400 to press into stator core 300 to the set depth under the restriction of guide column 24.

[0041] S5. Complete the interference fit between the flat key 400 and the stator core 300.

[0042] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. Interference flat key press-fit equipment, characterized in that, The utility model relates to a kind of positioning assembly and pressing assembly for stator core, including: Positioning assembly (100), the positioning assembly (100) includes with the ring surface of stator core (300) ring surface adhesion positioning core disc (11), the positioning core disc (11) is vertically fixed on support plate (12), the support plate (12) is fixed with core positioning block (13) and at least two limit pin (14) with the end surface contact of the positioning core disc (11), the core positioning block (13) is provided with positioning protrusion inserted into the rectangular positioning slot of the stator core (300); Pressing assembly (200), the pressing assembly (200) includes air cylinder (21) fixed on the top of the stator core (300), the telescopic section end of the air cylinder (21) is provided with pressure plate (22), the bottom of the pressure plate (22) is provided with flat key positioning block (23), the bottom of the flat key positioning block (23) is provided with flat key positioning slot (231) connected with flat key (400) magnetic suction.

2. The interference spline press fitting apparatus according to claim 1, wherein The bottom of the support plate (12) is fixedly connected with the bottom plate (15) through the vertical plate at both ends, and the core positioning block (13) is vertically fixed on the middle part of the bottom plate (15).

3. The interference spline press fitting apparatus according to claim 2, wherein The center of the positioning core disc (11) is provided with a mandrel (111), and the bottom plate (15) is hingedly provided with a rotating arm (16), one end of the mandrel (111) is supported by the free end of the rotating arm (16), and the other end of the mandrel (111) is fixed on the support plate (12).

4. The interference spline press fitting apparatus according to claim 3, wherein The bottom of the contact end of the mandrel (111) and the rotating arm (16) is provided with a limiting groove, the free end of the rotating arm (16) is provided with a bearing (161), and the outer ring of the bearing (161) is rollingly connected with the limiting groove.

5. The interference spline press fitting apparatus according to claim 1, wherein The top of the support plate (12) is fixedly connected with the top plate (25) through the vertical rod at both sides, the middle part of the top plate (25) is provided with a through hole, the air cylinder (21) is fixed on the top plate (25), and the telescopic end of the air cylinder (21) is fixedly connected with the pressure plate (22) through the through hole.

6. The interference spline press fitting apparatus according to claim 1, wherein The telescopic end of the air cylinder (21) is fixedly connected with the pressure plate (22) through a floating joint (221).

7. The interference spline press fitting apparatus according to claim 5, wherein The pressure plate (22) is fixed on the guide column (24) at both sides, and the two guide columns (24) are slidingly connected with the top plate (25) through the sliding bearing (161).

8. The interference spline press fitting apparatus according to claim 7, wherein The limiting ring (241) is fixed on each guide column (24).

9. The interference spline press fitting apparatus according to claim 1, wherein The top of the flat key positioning slot (231) in the flat key positioning block (23) is provided with a magnet (232).

10. The interference spline press fitting apparatus according to claim 1, wherein The positioning core disc (11) is a disc-like structure with a notch at the bottom.

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