Piano control driving motor

Abstract

The utility model relates to a piano control driving motor. The technical problem to be solved by the utility model is to provide a piano control driving motor. According to the technical scheme, the motor comprises a motor shell, a motor rear end cover, a motor stator assembly, a retainer, a motor rotor, a commutator, an electric brush, an external terminal and a reinforcing pin, the external terminal comprises a terminal inner connecting part, and the terminal inner connecting part is sequentially bent to form a terminal transition part. The upper end of the terminal transition part is vertically bent upwards to form a terminal external connection part, and the lower end of the terminal transition part is vertically bent inwards to form a terminal fixing part. Compared with the prior art, the electric connector has the advantages that the terminal reinforcing holes are formed in the external connection parts of the terminals, the terminals are firmly connected with the retainer through the reinforcing pins, and the terminal reinforcing holes are matched with the terminal fixing holes, so that bidirectional connection of the external terminals is realized, the external terminals are prevented from loosening or shifting in long-term use, and the stability of electric connection is ensured.

Description

Technical Field

[0001] The utility model relates to a piano control driving motor. Background Art

[0002] The piano control driving motor is used for a driving device in an automatic piano or a piano auxiliary device, and can realize precise driving and control of piano keys through an intelligent control system. The existing piano control driving motor includes a driving motor stator, a driving motor rotor, a commutator, a motor housing, a motor end cover, a carbon brush and an external connection terminal. It is found in actual use that the external connection terminal of the existing driving motor is easily driven by frequent external plugging and unplugging and the frequent movement of the internal carbon brush, so that the external connection terminal is prone to connection loosening or displacement, resulting in unreliable electrical connection, which will cause intermittent problems when the motor runs. In addition, it will make the current transmission uneven, resulting in an unbalanced current distribution between the carbon brush and the commutator, thereby increasing the wear of the carbon brush and shortening the service life of the carbon brush. Therefore, the existing piano control driving motor is improved and optimized. Summary of the Utility Model

[0003] In order to solve the above problems, the technical problem to be solved by the utility model is to provide a piano control driving motor.

[0004] The technical solution adopted by the piano control driving motor of the utility model is as follows: It is characterized by including a motor housing, a motor rear end cover, a motor stator assembly and a cage placed in the motor housing, a motor rotor passing through the motor stator assembly, a commutator sleeved on the motor rotor, a carbon brush corresponding to the commutator, an external connection terminal connected to the carbon brush, and a reinforcement pin. The external connection terminal includes a terminal internal connection part, the terminal internal connection part is sequentially bent to form a terminal transition part, the upper end of the terminal transition part is vertically bent upward to form a terminal external connection part, the lower end of the terminal transition part is vertically bent inward to form a terminal fixing part, an electric brush card slot for installing the carbon brush is arranged on the terminal internal connection part, a terminal fixing hole is arranged on the terminal fixing part, and a terminal reinforcement hole is arranged at the lower end of the terminal external connection part;

[0005] The retaining frame includes a retaining frame docking surface and a retaining frame outer edge, the bottom of the retaining frame outer edge is provided with retaining frame support feet that are abutted against the motor stator assembly at intervals around a circular arc, the front of the retaining frame docking surface is provided with terminal receiving bosses that are relatively arranged, and the terminal receiving bosses are provided with terminal sockets for the terminal external connection part to pass through, the retaining frame outer edge is provided with reinforcement holes that are vertically connected to the terminal sockets at the side walls of the terminal receiving bosses, and the back of the retaining frame docking surface is provided with a terminal inner receiving seat at the terminal socket for the terminal fixing part to receive, the terminal inner receiving seat is provided with a terminal inner mounting hole that is connected to the terminal fixing hole, and the side of the terminal inner receiving seat is provided with a second reinforcement hole that is connected to the reinforcement hole, and the reinforcement pin passes through the reinforcement hole and the terminal reinforcement hole in sequence and then docks with the second reinforcement hole.

[0006] The outer edge of the retaining frame is provided with an outer edge giving way groove at the side wall of the terminal receiving boss, and the reinforcement hole is provided in the outer edge giving way groove.

[0007] The front side of the retainer docking surface is provided with retainer positioning columns at intervals around a circular arc, the rear end cover of the motor is arranged on the retainer docking surface, and the rear end cover of the motor is provided with end cover positioning holes corresponding to the retainer positioning columns and retainer limiting recesses corresponding to the terminal receiving bosses.

[0008] The terminal inner receiving seat is provided with an inner receiving seat surrounding edge for installing and positioning the terminal fixing part.

[0009] The upper and lower ends of the terminal inner connecting portion are bent to form a terminal reinforcement portion.

[0010] The advantages of the piano control drive motor of the utility model are: by arranging a terminal reinforcement hole on the external terminal part, the terminal is firmly connected to the retaining frame with a reinforcement pin, and the terminal fixing hole is cooperated to realize a two-way connection of the external terminal, ensuring that the external terminal will not loosen or shift during long-term use, ensuring the stability of the electrical connection, and greatly reducing the risk of failure caused by loose terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0012] Figure 1 It is a schematic diagram of the overall structure of the piano control drive motor of the utility model;

[0013] Figure 2 This is an internal exploded view of the piano control drive motor of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the external terminal of the utility model;

[0015] Figure 4 It is a schematic diagram of the back structure of the cage of the present utility model;

[0016] Figure 5 It is a schematic diagram of the front structure of the cage of the present utility model;

[0017] Figure 6 It is a schematic diagram of the structure of the rear end cover of the motor of the present utility model. Specific embodiments

[0018] As Figure 1-6 shown, the piano control drive motor involved in the present utility model includes a motor housing 1, a motor rear end cover 2, a motor stator assembly 5 and a cage 7 disposed in the motor housing 1, a motor rotor 3 passing through the motor stator assembly 5, a commutator 6 sleeved on the motor rotor 3, a brush 8 corresponding to the commutator 6, an external terminal 4 connected to the brush 8, and a reinforcing pin 9. The external terminal 4 includes a terminal inner connection portion 20. The terminal inner connection portion 20 is sequentially bent to form a terminal transition portion 21. The upper end of the terminal transition portion 21 is vertically bent upward to form a terminal external connection portion 22. The lower end of the terminal transition portion 21 is vertically bent inward to form a terminal fixing portion 23. An electric brush card slot 24 for installing the brush 8 is provided on the terminal inner connection portion 20. The electric brush card slot 24 provides a stable connection between the brush and the terminal, reduces the friction and wear between the brush and the terminal, and extends the service life of the brush. A terminal fixing hole 25 is provided on the terminal fixing portion 23, and a terminal reinforcing hole 26 is provided at the lower end of the terminal external connection portion 22.

[0019] The retainer 7 includes a retainer docking surface 11 and a retainer peripheral edge 12. The bottom of the retainer peripheral edge 12 is provided with retainer support feet 13 that are abutted against the motor stator assembly 5 at intervals around a circular arc. The front of the retainer docking surface 11 is provided with a terminal receiving boss 14 that is relatively arranged. The terminal receiving boss 14 is provided with a terminal socket 15 for the terminal external connection portion 22 to pass through. The retainer peripheral edge 12 is provided with a reinforcement hole 16 that is vertically connected to the terminal socket 15 at the side wall of the terminal receiving boss 14. The back of the retainer docking surface 11 is provided with a terminal inner receiving seat 17 for the terminal fixing portion 23 to receive at the terminal socket 15. The terminal inner receiving seat 17 is provided with a terminal inner mounting hole 18 connected to the terminal fixing hole 25, and the side of the terminal inner receiving seat 17 is provided with a second reinforcement hole 19 connected to the reinforcement hole 16. The reinforcement pin 9 passes through the reinforcement hole 16 and the terminal reinforcement hole 26 in sequence and then connects with the second reinforcement hole 19. By providing the terminal reinforcement hole 26 on the terminal external connection part 22, the terminal is firmly connected to the retaining frame with the reinforcement pin, and the terminal fixing hole 25 is cooperated to realize a two-way connection of the external terminal, thereby ensuring that the external terminal will not loosen or shift during long-term use, ensuring the stability of the electrical connection, and greatly reducing the risk of failure caused by loose terminals.

[0020] The outer edge 12 of the retaining frame is provided with an outer edge giving way groove 30 on the side wall of the terminal receiving boss 14, and the reinforcement hole 16 is provided in the outer edge giving way groove 30, so that the reinforcement pin 9 is more convenient to install and remove, and will not interfere with the installation of the motor housing 1 and the motor rear end cover 2.

[0021] The front side of the retainer docking surface 11 is provided with retainer positioning posts 31 at intervals around a circular arc, and the motor rear end cover 2 is covered on the retainer docking surface 11. The motor rear end cover 2 is provided with end cover positioning holes 33 corresponding to the retainer positioning posts 31 and retainer limiting recesses 34 corresponding to the terminal receiving bosses 14, ensuring that the motor rear end cover 2 and the retainer 7 are accurately docked during the assembly process, thereby avoiding the problem of misalignment during the assembly process.

[0022] The terminal inner receiving seat 17 is provided with an inner receiving seat edge 35 for installing and positioning the terminal fixing portion 23, which makes the positioning more accurate and effectively reduces the shaking of the terminal.

[0023] The upper and lower ends of the terminal inner connection part 20 are bent to form a terminal reinforcement part 36, which effectively improves the bending and vibration resistance of the terminal, ensures that the terminal can remain stable under frequent use, and extends the overall service life of the equipment.

[0024] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model are all included within the protection scope of the present utility model.

Claims

1. A piano control drive motor, characterized in that: It includes a motor housing (1), a motor rear end cover (2), a motor stator assembly (5) and a cage (7) disposed within the motor housing (1), a motor rotor (3) passing through the motor stator assembly (5), a commutator (6) sleeved on the motor rotor (3), a brush (8) corresponding to the commutator (6), an external terminal (4) connected to the brush (8), and a reinforcement pin (9). The external terminal (4) includes a terminal inner connection portion (20). The terminal inner connection portion (20) is sequentially bent to form a terminal transition portion (21). The upper end of the terminal transition portion (21) is vertically bent upward to form a terminal external connection portion (22). The lower end of the terminal transition portion (21) is vertically bent inward to form a terminal fixing portion (23). An electric brush card slot (24) for installing the brush (8) is provided on the terminal inner connection portion (20). A terminal fixing hole (25) is provided on the terminal fixing portion (23). A terminal reinforcement hole (26) is provided at the lower end of the terminal external connection portion (22). The cage (7) includes a cage docking surface (11) and a cage peripheral edge (12). At the bottom of the cage peripheral edge (12), cage support feet (13) that abut against the motor stator assembly (5) are provided at intervals around an arc. On the front surface of the cage docking surface (11), terminal receiving bosses (14) are oppositely provided. A terminal socket (15) for the terminal external connection portion (22) to pass through is provided within the terminal receiving bosses (14). A reinforcement hole (16) that is vertically communicated with the terminal socket (15) is provided on the side wall of the cage peripheral edge (12) at the position of the terminal receiving bosses (14). On the back surface of the cage docking surface (11) at the position of the terminal socket (15), a terminal inner receiving seat (17) for receiving the terminal fixing portion (23) is provided. A terminal inner mounting hole (18) that is docked with the terminal fixing hole (25) is provided on the terminal inner receiving seat (17). A second reinforcement hole (19) that is communicated with the reinforcement hole (16) is provided on the side of the terminal inner receiving seat (17). The reinforcement pin (9) sequentially passes through the reinforcement hole (16), the terminal reinforcement hole (26), and then is docked with the second reinforcement hole (19).

2. The piano control drive motor according to claim 1, wherein: On the side wall of the cage peripheral edge (12) at the position of the terminal receiving bosses (14), a peripheral edge relief groove (30) is provided. The reinforcement hole (16) is provided within the peripheral edge relief groove (30).

3. The piano control drive motor according to claim 1, characterized in that: On the front surface of the cage docking surface (11), cage positioning posts (31) are provided at intervals around an arc. The motor rear end cover (2) is covered on the cage docking surface (11). On the motor rear end cover (2), end cover positioning holes (33) corresponding to the cage positioning posts (31) and cage limiting notches (34) corresponding to the terminal receiving bosses (14) are provided.

4. The piano control drive motor according to claim 1, characterized in that: An inner receiving seat peripheral edge (35) for installing and positioning the terminal fixing portion (23) is provided on the terminal inner receiving seat (17).

5. The piano control drive motor according to claim 1, characterized in that: Terminal strengthening portions (36) are formed by bending the upper and lower ends of the terminal inner connection portion (20).

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