A locking structure for a T-shaped pin of a I-shaped permanent magnet in a permanent magnet motor

Abstract

The present invention provides a locking structure for a T-shaped pin of a I-shaped permanent magnet in a permanent magnet motor, belonging to the technical field of permanent magnet motors. Grooves are provided at the middle positions on both sides of the permanent magnet in the present invention. The T-shaped part of the T-shaped pin is inserted into the grooves of two juxtaposed permanent magnets. The lower part of the T-shaped pin faces the rotor surface, and a screw fixes the T-shaped pin to the rotor surface. A baffle is inserted into the grooves of two juxtaposed permanent magnets. The baffle is located above the T-shaped part of the T-shaped pin, and the lower surface of the baffle abuts against the upper surface of the T-shaped part of the T-shaped pin to prevent the screw from falling off. The length of the baffle is longer than that of the permanent magnet. A baffle slot is provided on the pole pressing plate, and the shape of the baffle slot matches that of the baffle. The part of the baffle that is longer than the permanent magnet is inserted into the baffle slot to fix the baffle by the pole pressing plate. The present invention is used for a surface-mounted permanent magnet motor with surface-mounted permanent magnets. By adopting the locking structure of the I-shaped permanent magnet and the T-shaped pin, the reliability of the surface-mounted permanent magnet structure can be greatly increased, and the process difficulty and cost can be reduced.

Description

Technical Field

[0001] The present invention relates to a locking structure of a T-shaped pin for I-shaped permanent magnets of a permanent magnet motor, belonging to the technical field of permanent magnet motors. Background Art

[0002] A permanent magnet motor is composed of components such as a stator, a rotor, and an end cover. The stator is basically the same as a common induction motor, and a laminated structure is adopted to reduce the iron loss during the operation of the motor. The rotor can be made solid or laminated. The armature winding can adopt a concentrated full-pitch winding, a distributed short-pitch winding, or an unconventional winding.

[0003] In the prior art, the surface-mounted permanent magnet process solutions of permanent magnet motors are divided into the following several types:

[0004] 1. The dovetail groove structure, and the dovetail groove structure is used for the punching sheet; however, it is difficult to control the magnetic flux leakage of the permanent magnet in this method, and the depth of the groove directly affects the magnetic flux leakage;

[0005] 2. A counterbore is opened in the middle of the permanent magnet, and a countersunk screw is used for fixing; however, opening a hole in the middle of the permanent magnet directly affects the performance of the permanent magnet;

[0006] 3. The adhesive method is adopted, and carbon fiber is wrapped outside; however, the process of this solution is relatively complex and the cost is relatively high.

[0007] Due to many problems such as poor magnetic circuit performance, complex process, and high cost of the surface-mounted permanent magnet installation method in the prior art, there is an urgent need for a locking structure of a permanent magnet motor to increase the reliability of the surface-mounted permanent magnet structure and reduce the process difficulty and cost. Summary of the Invention

[0008] The purpose of the present invention is to solve the above-mentioned many problems of the surface-mounted permanent magnet installation method in the prior art, such as poor magnetic circuit performance, complex process, and high cost, and further provide a locking structure of a T-shaped pin for I-shaped permanent magnets of a permanent magnet motor.

[0009] The purpose of the present invention is achieved by the following technical solutions:

[0010] A locking structure of a T-shaped pin for I-shaped permanent magnets of a permanent magnet motor includes: a permanent magnet, a baffle, a screw, a T-shaped pin, a pole pressing plate, and a baffle slot;

[0011] Among them, grooves are provided at the middle positions on both sides of the permanent magnet. The T-shaped part of the T-shaped pin is inserted into the grooves of two juxtaposed permanent magnets. The lower part of the T-shaped pin faces the rotor surface, and the T-shaped pin is fixed to the rotor surface with screws. The baffle is inserted into the grooves of two juxtaposed permanent magnets. The baffle is located above the T-shaped part of the T-shaped pin, and the lower surface of the baffle abuts against the upper surface of the T-shaped part of the T-shaped pin to prevent the screw from falling off. The length of the baffle is longer than that of the permanent magnet. A baffle card slot is provided on the magnetic pole pressing plate, and the shape of the baffle card slot matches that of the baffle. The part of the baffle that is longer than the permanent magnet is inserted into the baffle card slot to fix the baffle with the magnetic pole pressing plate.

[0012] The screw is a countersunk screw.

[0013] The magnetic pole pressing plate and the baffle are arranged perpendicular to each other.

[0014] The length of the baffle is equal to the sum of the total length of the permanent magnet and the thickness of the magnetic pole pressing plate.

[0015] The permanent magnet is a segmented permanent magnet.

[0016] The length of the T-shaped pin is the same as the total length of each segmented permanent magnet.

[0017] The length of the baffle is equal to the sum of the total length of each segmented permanent magnet and the thickness of the magnetic pole pressing plate.

[0018] The beneficial effects of the present invention are as follows:

[0019] In the present invention, T-shaped positioning pins are used for positioning between the magnetic steels. The positioning pins and the rotor surface are fastened with countersunk screws. Then, a baffle is inlaid to reinforce the overall structure, and a magnetic pole pressing plate is used to reinforce the baffle, thereby solving the problems of complex surface-mounted technology and poor reliability of the existing surface-mounted permanent magnet motors with surface-mounted magnetic steels.

[0020] The present invention includes I-shaped magnetic steels, T-shaped positioning pins, baffles, magnetic pole pressing plates, and countersunk screws; the T-shaped positioning pins are used for positioning the magnetic steels, the countersunk screws are used for locking the T-shaped positioning pins, the baffles are used to prevent the screws from falling off, and the magnetic pole pressing plates are used to reinforce the baffles. The present invention is used for surface-mounted permanent magnet motors. The I-shaped magnetic steel T-shaped pin locking structure can greatly increase the reliability of the surface-mounted magnetic steel structure and reduce the process difficulty and cost. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of an I-shaped magnetic steel T-shaped pin locking structure of a permanent magnet motor according to the present invention.

[0022] Figure 2 It is a schematic structural diagram of the T-shaped pin of an I-shaped magnetic steel T-shaped pin locking structure of a permanent magnet motor according to the present invention.

[0023] Figure 3Schematic diagram of the pole pressing plate and baffle card slot structure of the I-shaped magnet T-pin locking structure of a permanent magnet motor according to the present invention.

[0024] Figure 4 Schematic diagram of the installation structure of the I-shaped magnet T-pin locking structure of a permanent magnet motor according to the present invention.

[0025] In the accompanying drawings in the figure, 1 is a permanent magnet, 2 is a baffle, 3 is a screw, 4 is a T-pin, 5 is a pole pressing plate, and 6 is a baffle card slot. Detailed implementation mode

[0026] The following will further describe the present invention in detail with reference to the accompanying drawings: This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner is given, but the protection scope of the present invention is not limited to the following embodiments.

[0027] As Figures 1 to 4 shown, an I-shaped magnet T-pin locking structure of a permanent magnet motor involved in this embodiment includes: a permanent magnet 1, a baffle 2, a screw 3, a T-pin 4, a pole pressing plate 5, and a baffle card slot 6;

[0028] Among them, grooves are provided at the middle positions on both sides of the permanent magnet 1, the T-shaped part of the T-pin 4 is inserted into the grooves of two juxtaposed permanent magnets 1, the lower part of the T-pin 4 faces the rotor surface, the screw 3 fixes the T-pin 4 and the rotor surface, the baffle 2 is inserted into the grooves of two juxtaposed permanent magnets 1, the baffle 2 is located above the T-shaped part of the T-pin 4, the lower surface of the baffle 2 abuts against the upper surface of the T-shaped part of the T-pin 4 to prevent the screw 3 from falling off, the length of the baffle 2 is longer than that of the permanent magnet 1, a baffle card slot 6 is provided on the pole pressing plate 5, the shape of the baffle card slot 6 matches that of the baffle 2, and the part of the baffle 2 that is longer than the permanent magnet 1 is inserted into the baffle card slot 6 to fix the baffle 2 by the pole pressing plate 5.

[0029] The screw 3 is a countersunk head screw.

[0030] The pole pressing plate 5 and the baffle 2 are arranged perpendicular to each other.

[0031] The length of the baffle 2 is equal to the sum of the total length of the permanent magnet 1 and the thickness of the pole pressing plate 5.

[0032] The permanent magnet 1 is a segmented permanent magnet.

[0033] The length of the T-pin 4 is the same as the total length of each segmented permanent magnet 1.

[0034] The length of the baffle 2 is equal to the sum of the total length of each segmented permanent magnet 1 and the thickness of the pole pressing plate 5.

[0035] Embodiment 1

[0036] As Figure 1As shown, grooves are provided at the middle positions on both sides of the I-shaped permanent magnet 1. The shape and structure of the T-shaped pin 4 are as Figure 2 shown. The T-shaped part of the T-shaped pin 4 is inserted into the grooves of two juxtaposed permanent magnets 1. The I-shaped permanent magnets 1 are positioned by the T-shaped pins 4. The lower part of the T-shaped pin 4 faces the rotor surface. The screw 3 fixes the T-shaped pin 4 to the rotor surface. The positioning of the T-shaped pin 4 and the rotor surface is fastened by the countersunk head screw 3. The baffle 2 is inserted into the grooves of two juxtaposed permanent magnets 1. The baffle 2 is located above the T-shaped part of the T-shaped pin 4. The lower surface of the baffle 2 abuts against the upper surface of the T-shaped part of the T-shaped pin 4 to prevent the screw 3 from falling off. The length of the baffle 2 is longer than that of the permanent magnet 1. The inlaid baffle 2 strengthens the overall structure.

[0037] As Figure 3 shown, a baffle slot 6 is provided on the pole pressing plate 5. The shape of the baffle slot 6 matches that of the baffle 2;

[0038] As Figure 4 shown, the part of the baffle 2 that is longer than the permanent magnet 1 is inserted into the baffle slot 6, and the pole pressing plate 5 is used to strengthen the baffle 2.

[0039] In this embodiment, the T-shaped pin 4 is used to position the permanent magnet 1, the countersunk head screw 3 is used to lock the T-shaped pin 4, the baffle 2 is used to prevent the screw 3 from falling off, and the pole pressing plate 5 is used to strengthen the baffle 2. The permanent magnets 1 are positioned by the T-shaped pins 4. The T-shaped pins 4 and the rotor surface are fastened by the countersunk head screws 3. Then, the baffle 2 is inlaid to strengthen the overall structure, and the pole pressing plate 5 is used to strengthen the baffle 2 to solve the problems of complex surface-mounted process and poor reliability of the existing surface-mounted permanent magnet motors with surface-mounted magnets, which can greatly increase the reliability of the surface-mounted magnet structure and reduce the process difficulty and cost.

[0040] And this embodiment includes an I-shaped magnet, a T-shaped positioning pin, a baffle, a pole pressing plate and a countersunk head screw; the T-shaped positioning pin is used to position the magnet, the countersunk head screw is used to lock the T-shaped positioning pin, the baffle is used to prevent the screw from falling off, and the pole pressing plate is used to strengthen the baffle. The present invention is used for surface-mounted permanent magnet motors. By adopting the I-shaped magnet T-shaped pin locking structure, the reliability of the surface-mounted magnet structure can be greatly increased, and the process difficulty and cost can be reduced.

[0041] Embodiment 2

[0042] As Figure 1 shown, grooves are provided at the middle positions on both sides of the I-shaped permanent magnet 1. The shape and structure of the T-shaped pin 4 are as Figure 2As shown, the T-shaped part of the T-shaped pin 4 is inserted into the grooves of two juxtaposed permanent magnets 1. The I-shaped permanent magnets 1 are positioned by the T-shaped pin 4. The lower part of the T-shaped pin 4 faces the rotor surface. The screw 3 fixes the T-shaped pin 4 to the rotor surface. The positioning of the T-shaped pin 4 and the rotor surface is fastened by a countersunk screw 3. The baffle 2 is inserted into the grooves of two juxtaposed permanent magnets 1. The baffle 2 is located above the T-shaped part of the T-shaped pin 4. The lower surface of the baffle 2 abuts against the upper surface of the T-shaped part of the T-shaped pin 4 to prevent the screw 3 from falling off. The length of the baffle 2 is longer than that of the permanent magnet 1. The inlaid baffle 2 strengthens the overall structure.

[0043] As Figure 3 shown, a baffle slot 6 is provided on the pole pressing plate 5. The shape of the baffle slot 6 matches that of the baffle 2;

[0044] As Figure 4 shown, the part of the baffle 2 that is longer than the permanent magnet 1 is inserted into the baffle slot 6, and the pole pressing plate 5 is used to strengthen the baffle 2.

[0045] The difference between this embodiment and Embodiment 1 is that the permanent magnet 1 is a segmented permanent magnet. The length of the T-shaped pin 4 is the same as the total length of each segmented permanent magnet 1. The length of the baffle 2 is longer than the total length of each segmented permanent magnet 1, and the exceeded length is the same as the thickness of the pole pressing plate 5.

[0046] For example: the rotor length is 500 mm, the length of a single permanent magnet 1 is 50 mm, the number of permanent magnets is 10. The length of the T-shaped pin 4 is the same as the total length of each segmented permanent magnet 1, which is 500 mm. The length of the baffle 2 is longer than the total length of each segmented permanent magnet 1, and the length of the baffle 2 is equal to the sum of the total length of each segmented permanent magnet 1 and the thickness of the pole pressing plate 5. The part of the baffle 2 that is longer than the total length of each segmented permanent magnet 1 is stuck in the baffle slot 6 on the pole pressing plate 5.

[0047] In this embodiment, the T-shaped pin 4 is used to position the permanent magnet 1, the countersunk screw 3 is used to lock the T-shaped pin 4, the baffle 2 is used to prevent the screw 3 from falling off, and the pole pressing plate 5 is used to strengthen the baffle 2. The permanent magnets 1 are positioned by the T-shaped pin 4. The segmented permanent magnets 1 are arranged. The length of a single permanent magnet 1 is 50 mm, the number of permanent magnets is 10, and the total length of each segmented permanent magnet 1 is 500 mm. The length of the T-shaped pin 4 is the same as the total length of each segmented permanent magnet 1, which is 500 mm. The T-shaped pin is wedged into the permanent magnet 1. The T-shaped pin 4 and the rotor surface are fastened by a countersunk screw 3. Then, the baffle 2 is inlaid to strengthen the overall structure, and the pole pressing plate 5 is used to strengthen the baffle 2, so as to solve the problems of complex surface-mounted process and poor reliability of the existing surface-mounted permanent magnet motors with surface-mounted magnets, which can greatly increase the reliability of the surface-mounted magnet structure and reduce the process difficulty and cost.

[0048] Moreover, this embodiment includes an I-shaped permanent magnet, a T-shaped positioning pin, a baffle plate, a pole pressing plate and a countersunk head screw; the T-shaped positioning pin is used to position the permanent magnet, the countersunk head screw is used to lock the T-shaped positioning pin, the baffle plate is used to prevent the screw from falling off, and the pole pressing plate is used to reinforce the baffle plate. The present invention is used for a surface-mounted permanent magnet motor with an I-shaped permanent magnet and a T-shaped pin locking structure, which can greatly increase the reliability of the surface-mounted permanent magnet structure and reduce the process difficulty and cost.

[0049] As described above, the above are only the preferred specific embodiments of the present invention. These specific embodiments are all different implementation manners based on the overall concept of the present invention, and the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A locking structure for a I-shaped permanent magnet of a permanent magnet motor with a T-shaped pin, characterized in that Comprising: A permanent magnet (1), a baffle (2), a screw (3), a T-shaped pin (4), a pole pressing plate (5), and a baffle slot (6); Among them, grooves are provided at the middle positions on both sides of the permanent magnet (1). The T-shaped part of the T-shaped pin (4) is inserted into the grooves of two juxtaposed permanent magnets (1). The lower part of the T-shaped pin (4) is arranged towards the rotor surface. The screw (3) fixes the T-shaped pin (4) to the rotor surface. The baffle (2) is inserted into the grooves of two juxtaposed permanent magnets (1). The baffle (2) is located above the T-shaped part of the T-shaped pin (4). The lower surface of the baffle (2) abuts against the upper surface of the T-shaped part of the T-shaped pin (4) to prevent the screw (3) from falling off. The length of the baffle (2) is longer than that of the permanent magnet (1). A baffle slot (6) is provided on the pole pressing plate (5). The shape of the baffle slot (6) matches that of the baffle (2). The part of the baffle (2) that is longer than the permanent magnet (1) is inserted into the baffle slot (6) to fix the baffle (2) by the pole pressing plate (5).

2. The locking structure of the I-shaped magnet steel T-shaped pin of a permanent magnet motor according to claim 1, wherein The screw (3) is a countersunk head screw.

3. A locking structure for a T-shaped pin of a I-shaped permanent magnet in a permanent magnet motor according to claim 1, characterized in that, The pole pressing plate (5) and the baffle (2) are arranged perpendicular to each other.

4. A locking structure for a T-shaped pin of a I-shaped permanent magnet in a permanent magnet motor according to claim 1, characterized in that, The length of the baffle (2) is equal to the sum of the total length of the permanent magnet (1) and the thickness of the pole pressing plate (5).

5. A locking structure for a T-shaped pin of a I-shaped permanent magnet in a permanent magnet motor according to claim 1, characterized in that, The permanent magnet (1) is a segmented permanent magnet.

6. A locking structure of a T-shaped pin for a I-shaped permanent magnet in a permanent magnet motor according to claim 5, characterized in that, The length of the T-shaped pin (4) is the same as the total length of each segmented permanent magnet (1).

7. A locking structure of a T-shaped pin for a I-shaped permanent magnet in a permanent magnet motor according to claim 5, characterized in that The length of the baffle (2) is equal to the sum of the total length of each segmented permanent magnet (1) and the thickness of the pole pressing plate (5).

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