High-stability long-shaft output motor

Abstract

The utility model discloses a high-stability long-shaft output motor, which relates to the field of motor design and comprises a motor shell, a rotor and a shaft cover. The rotor comprises a rotating shaft, a coil holder and a commutator, the rotating shaft is installed between the motor shell and the shaft cover in a running fit mode, the coil holder and the commutator are both fixedly installed on the rotating shaft, and the diameter of the rotating shaft is 4 mm; slots are formed in the two sides in the shaft cover, and terminals are installed in the slots in an inserted and matched mode. At least two salient points are fixedly mounted on the side wall of the terminal, a transverse groove is formed in the side wall of the slot, the outer ends of the salient points are in clearance fit in the transverse groove, an elastic metal sheet is arranged at the inner end of the terminal, at least two open holes are formed in the elastic metal sheet, and the inner ends of the salient points are in clearance fit in the open holes; according to the utility model, the diameter of the rotating shaft of the traditional RS595 direct-current brush motor is increased, and the diameter of the rotating shaft of 4mm can ensure that the rotating shaft is not easy to bend when the motor is in the production processes of core punching and worm pressing, so that the problems of large vibration amplitude and large noise of the motor of the model are solved.

Description

Technical Field

[0001] The utility model relates to the field of motor design, in particular to a long-shaft output motor with high stability. Background Technique

[0002] Currently, the DC brushed motors of model RS595 basically adopt motors with a shaft diameter of 3.175 mm. Since the motor shaft of this model is relatively long, the strength of the 3.175 mm diameter motor shaft is insufficient. During the production of the motor, specifically in the rotor punching core process stage, the shaft is prone to bending, resulting in the shaft bending defect of the motor product, and the vibration and noise during use are large. Therefore, it is necessary to increase the diameter of the long-shaft output motor of this model.

[0003] In addition, among the ordinary motors and long-shaft output motors on the market at present, the mounting firmness of the pin positions is relatively low. For example, in the prior art (publication number: CN205453369U, publication date: August 10, 2016), a heat dissipation structure of a motor is disclosed. Its terminals extend out of the rear cover for wiring. When the motor is working, the carbon brush electrically connected to the terminal will always press against the commutator of the rotating shaft to ensure the high-speed rotation of the rotating shaft. Since the carbon brush will rub against the commutator, a certain force will be transmitted to the terminal. The fixing methods of the terminals on the market generally have unstable phenomena, and it is easy to have position deviation, resulting in poor contact of the motor, which will affect the service life of the motor. Therefore, it is necessary to design a long-shaft output motor with high stability for the existing terminal and carbon brush structures to solve this technical problem. Content of the Utility Model

[0004] The utility model overcomes the above situation and provides a technical solution that can solve the above problems.

[0005] A long-shaft output motor with high stability includes a motor housing, a rotor, and an end cover. The rotor is installed between the motor housing and the end cover;

[0006] The rotor includes a rotating shaft, a wire frame, and a commutator. The rotating shaft is rotatably installed between the motor housing and the end cover. The wire frame and the commutator are both fixedly installed on the rotating shaft. The diameter of the rotating shaft is 4 mm;

[0007] Slots are formed on both sides inside the end cover. Terminals are inserted and installed in the slots in a plug-in fit. The outer ends of the terminals extend out of the end cover. The inner ends of the terminals are bent to form right-angled edges;

[0008] At least two bumps are fixedly installed on the side wall of the terminal. A transverse groove is formed on the side wall of the slot. The outer ends of the bumps are inserted into the transverse groove with a clearance fit. An elastic metal sheet is arranged at the inner end of the terminal. At least two openings are formed on the elastic metal sheet. The inner ends of the bumps are inserted into the openings with a clearance fit;

[0009] A carbon brush is fixedly installed at the inner end of the elastic metal sheet, and the carbon brush abuts against the outer side of the commutator.

[0010] Further: First planes are formed on both side walls inside the shaft cover, positioning columns are formed on both sides inside the shaft cover, a second plane is formed on one side of the positioning column close to the first plane, and a slot is formed between the first plane and the second plane.

[0011] Further: The transverse groove is integrally formed on the first plane.

[0012] Further: A threaded hole is formed at the inner end of the positioning column, a positioning hole is formed on the right-angled side, a screw is installed through the positioning hole, a nut is formed at the outer end of the screw, the nut presses against the right-angled side, and the inner end of the screw is helically engaged and locked in the threaded hole.

[0013] Further: A first through hole is formed in the middle of the left side of the motor housing, a second through hole is formed on the shaft cover, and both ends of the rotating shaft are rotatably installed in the first through hole and the second through hole respectively.

[0014] Further: Rolling bearings are fixedly installed at both ends of the rotating shaft, bearing seats are formed inside the motor housing and the shaft cover, and the rolling bearings are installed in the bearing seats in a one-to-one correspondence with clearance fit.

[0015] Further: Two annular permanent magnets are fixedly installed inside the motor housing, the wire frame is located between the two annular permanent magnets, a conductive copper wire is wound and installed on the wire frame, and the conductive copper wire is electrically connected and installed on the commutator.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. The diameter of the rotating shaft of the traditional RS595 DC brushed motor is increased. A rotating shaft diameter of 4 mm can ensure that the rotating shaft is not easily bent during the production processes of core punching and worm pressing, thereby improving the vibration amplitude and large noise problems of this type of motor during operation;

[0018] 2. The motor uses an elastic metal sheet to make the carbon brush abut against the commutator to complete the brushed electrical connection. Since bumps are provided on the terminal 5, the bumps can be inserted and matched with the transverse grooves in the slot, thereby achieving stable cooperation. Even if the carbon brush rubs against the commutator, it will not affect the installation position of the terminal, and can provide precise positioning for the terminal, avoiding the situation of terminal offset after long-term operation, and thus ensuring the service life of the motor.

[0019] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is an exploded structural diagram of the present invention;

[0023] Figure 3 is a schematic installation structure diagram of a slot, a terminal and an elastic metal sheet;

[0024] Figure 4 is a schematic structural diagram of another perspective of the present invention;

[0025] Figure 5 is an exploded structural diagram of another perspective of the present invention;

[0026] Figure 6 is Figure 5 an enlarged structural diagram at position A of

[0027] As shown in the figure: 1. Motor housing; 2. Rotor; 2.1. Rotating shaft; 2.2. Coil frame; 2.3. Commutator; 3. Axle cover; 4. Slot; 5. Terminal; 6. Right-angle side; 7. Bump; 8. Horizontal groove; 9. Elastic metal sheet; 10. Opening; 11. Carbon brush; 12. First plane; 13. Positioning post; 14. Second plane; 15. Threaded hole; 16. Positioning hole; 17. Screw; 18. Nut; 19. First through hole; 20. Second through hole; 21. Rolling bearing; 22. Bearing seat; 23. Ring permanent magnet. Detailed implementation manners

[0028] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0029] Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention.

[0030] Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] As Figures 1-6 shown, a high-stability long-axis output motor of the present utility model includes a motor housing 1, a rotor 2, and an end cover 3. The rotor 2 is installed between the motor housing 1 and the end cover 3. The rotor 2 includes a rotating shaft 2.1, a wire frame 2.2, and a commutator 2.3. The rotating shaft 2.1 is rotatably installed between the motor housing 1 and the end cover 3. The wire frame 2.2 and the commutator 2.3 are both fixedly installed on the rotating shaft 2.1. The diameter of the rotating shaft 2.1 is 4 mm. Slots 4 are formed on both sides inside the end cover 3. Terminals 5 are inserted and installed in the slots 4 in a mating manner. The outer ends of the terminals 5 extend out of the end cover 3. Right-angle edges 6 are formed by bending the inner ends of the terminals 5. At least two bumps 7 are fixedly installed on the side walls of the terminals 5. Transverse grooves 8 are formed on the side walls of the slots 4. The outer ends of the bumps 7 are inserted into the transverse grooves 8 with a clearance fit. Elastic metal sheets 9 are provided at the inner ends of the terminals 5. At least two openings 10 are formed on the elastic metal sheets 9. The inner ends of the bumps 7 are inserted into the openings 10 with a clearance fit. Carbon brushes 11 are fixedly installed at the inner ends of the elastic metal sheets 9. The carbon brushes 11 abut against the outside of the commutator 2.3.

[0034] The principle is as follows: The diameter of the rotating shaft 2.1 of the traditional RS595 DC brushed motor is increased. A diameter of 4 mm for the rotating shaft 2.1 can ensure that the rotating shaft 2.1 is not easily bent during the production processes of punching the core and pressing the worm, thereby improving the vibration amplitude and large noise problems of this type of motor during operation. At the same time, this motor uses an elastic metal sheet 9 to make the carbon brush 11 press against the commutator 2.3 to complete the brushed electrical connection. Since bumps 7 are provided on the terminal 5, the bumps 7 can be inserted and cooperated with the transverse grooves 8 in the slot 4, thereby achieving stable cooperation. Even if the carbon brush 11 rubs against the commutator 2.3, it will not affect the installation position of the terminal 5. This solution can provide precise positioning for the terminal 5, avoid the situation of the terminal 5 shifting after long-term operation, and thus ensure the service life of the motor.

[0035] Furthermore: On both side walls inside the shaft cover 3, first planes 12 are formed. On both sides inside the shaft cover 3, positioning posts 13 are formed. On one side of the positioning post 13 close to the first plane 12, a second plane 14 is formed. The slot 4 is arranged between the first plane 12 and the second plane 14; this enables the terminal 5 to be stably fitted in the slot 4, and the terminal 5 will not show angular deviation or looseness.

[0036] Furthermore: The transverse groove 8 is integrally formed on the first plane 12; the bumps 7 on the terminal 5 can be precisely fitted in the transverse groove 8, thereby effectively preventing the terminal 5 from tilting and shifting.

[0037] Furthermore: A threaded hole 15 is formed at the inner end of the positioning post 13. A positioning hole 16 is formed on the right-angled side 6. A screw 17 is installed through the positioning hole 16. A nut 18 is formed at the outer end of the screw 17, and the nut 18 presses against the right-angled side 6. The inner end of the screw 17 is screwed and locked in the threaded hole 15; the installation and locking of the terminal 5 can be completed by using the screw 17. When the outer leg of the terminal 5 is bent or broken, it can be replaced by loosening the bolt 17, which facilitates the maintenance work of the motor.

[0038] Furthermore: A first through hole 19 is formed in the middle of the left side of the motor housing 1. A second through hole 20 is formed on the shaft cover 3. Both ends of the rotating shaft 2.1 are rotatably fitted and installed in the first through hole 19 and the second through hole 20 respectively; this makes the rotation of the rotating shaft 2.1 more stable, thereby effectively reducing the noise generated when the rotor 2 rotates.

[0039] Furthermore: Rolling bearings 21 are fixedly installed at both ends of the rotating shaft 2.1. Bearing seats 22 are formed inside both the motor housing 1 and the shaft cover 3. The rolling bearings 21 are installed in the bearing seats 22 in a one-to-one corresponding clearance fit; this can reduce the rotational friction of the rotor 2.1 in the first through hole 19 and the second through hole 20, thereby effectively reducing the noise during motor operation.

[0040] Furthermore: Two annular permanent magnets 23 are fixedly installed inside the motor housing 1. The wire frame 2.2 is located between the two annular permanent magnets 23. A conductive copper wire is wound and installed on the wire frame 2.2, and the conductive copper wire is electrically connected to the commutator 2.3. After the conductive copper wire is energized, a dynamic magnetic field can be generated with the annular permanent magnet 23, thereby effectively determining the high-speed rotation of the rotor 2.

[0041] This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A highly stable long-shaft output motor, comprising a motor housing, a rotor and a shaft cover, wherein the rotor is installed between the motor housing and the shaft cover; characterized in that: The rotor includes a rotating shaft, a bobbin and a commutator. The rotating shaft is rotatably mounted between the motor housing and the shaft cover. The bobbin and the commutator are both fixedly mounted on the rotating shaft. The diameter of the rotating shaft is 4 mm. Slots are formed on both sides of the shaft cover, and terminals are installed in the slots for plugging and matching. The outer ends of the terminals extend out of the shaft cover, and the inner ends of the terminals are bent to form right-angled edges. At least two protrusions are fixedly mounted on the side wall of the terminal, a transverse groove is formed on the side wall of the slot, and the outer end of the protrusion is inserted into the transverse groove with clearance, and an elastic metal sheet is provided at the inner end of the terminal, and at least two openings are formed on the elastic metal sheet, and the inner end of the protrusion is inserted into the opening with clearance; A carbon brush is fixedly mounted on the inner end of the elastic metal sheet, and the carbon brush abuts against the outer side of the commutator.

2. A highly stable long-axis output motor according to claim 1, characterized in that: A first plane is formed on both side walls of the shaft cover, a positioning column is formed on both sides of the shaft cover, a second plane is formed on one side of the positioning column close to the first plane, and a slot is formed between the first plane and the second plane.

3. A highly stable long-axis output motor according to claim 2, characterized in that: The transverse groove is integrally formed and arranged on the first plane.

4. A highly stable long-axis output motor according to any one of claims 2 or 3, characterized in that: The inner end of the positioning column is formed with a threaded hole, and the right-angle side is formed with a positioning hole. A screw is installed in the positioning hole, and a nut is formed at the outer end of the screw. The nut presses the right-angle side, and the inner end of the screw is spirally locked in the threaded hole.

5. The highly stable long-axis output motor according to claim 1, characterized in that: A first through hole is formed in the middle of the left side of the motor housing, a second through hole is formed on the shaft cover, and two ends of the rotating shaft are rotatably mounted in the first through hole and the second through hole respectively.

6. A highly stable long-axis output motor according to claim 5, characterized in that: Rolling bearings are fixedly installed at both ends of the rotating shaft, and bearing seats are formed in the motor housing and the shaft cover. The rolling bearings are installed in the bearing seats with a one-to-one clearance fit.

7. The highly stable long-axis output motor according to claim 1, characterized in that: Two annular permanent magnets are fixedly installed in the motor housing, a bobbin is located between the two annular permanent magnets, a conductive copper wire is wound around the bobbin, and the conductive copper wire is electrically connected and installed on the commutator.

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