Motor cover plate

Abstract

The utility model discloses a motor cover plate, and relates to the field of motor design, the motor cover plate comprises an end cover, the left end and the right end in the end cover are provided with protruding positions, a first reinforcing rib is integrally formed between one side of each protruding position and the end cover, and the protruding positions, the first reinforcing ribs and the end cover form a containing groove; inserting edges are formed on the left side and the right side in the end cover, the protruding positions are arranged on the inner sides of the inserting edges in a one-to-one correspondence mode, and inserting grooves are formed between the protruding positions and the inserting edges. A terminal and an elastic piece are installed in the inserting groove in an inserted and matched mode, the outer end of the terminal extends out of the end cover, the side edge of the terminal is attached to the elastic piece, and a carbon brush is fixedly installed at the inner end of the elastic piece. According to the utility model, the protruding positions and the plugging edges form a slot structure, and the terminal and the elastic sheet can be inserted into the slot together to be fixed after being attached to each other, so that accurate positioning of the terminal and the elastic sheet is realized; and meanwhile, the first reinforcing ribs are arranged to enhance the strength of the convex positions, so that the slots are not deformed, and the stable assembly of the terminals and the elastic sheets is further ensured.

Description

Technical Field

[0001] The utility model relates to the field of motor design, in particular to a motor cover. Background Art

[0002] Carbon brushes are devices for transmitting energy or signals between the fixed part and the rotating part of an electric motor, generator or other rotating machinery. As a sliding contact part, they are widely used in many electrical devices. The materials of carbon brushes are mainly electroplated graphite, impregnated graphite and metal graphite. In a brushed motor, the traditional installation method of carbon brushes is to install them in a brush box, press the carbon brushes with a spring to contact the commutator, conduct current and make the motor work. The prior art (Announcement No.: CN102611239A, Announcement Date: 2012-07-25) discloses a carbon brush assembly structure, which is provided with a carbon brush receiving groove inside the end cover, and the carbon brush is directly installed in the carbon brush receiving groove inside the end cover, and the carbon brush is pressed with a carbon brush spring to contact the commutator, which not only enhances the safety of motor operation, but also has a simple structure, convenient installation, and reduces the number of parts, thereby reducing production costs.

[0003] However, in the above scheme, the carbon brush is pressed against the commutator by a spring, and a receiving groove needs to be provided in the end cover to provide a stable sliding space for the carbon brush. The spring and the carbon brush need to be installed in the receiving groove during production and assembly. Due to the small space of the receiving groove, there is a defect of difficulty in assembly, and the production efficiency is low. In addition, because the carbon brush needs to always be pressed against the commutator to realize the normal operation of the brushed motor, when the brushed motor rotates at high speed, its vibration will be transmitted to the carbon brush. If the receiving groove and spring are not provided, the stability of the carbon brush is low, and position deviation is prone to occur, resulting in poor circuit contact. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings, the utility model provides a technical solution that can solve the above-mentioned problems.

[0005] A motor cover plate comprises an end cover, wherein both left and right ends of the end cover are formed with protrusions, a first reinforcing rib is integrally formed between one side of the protrusion and the end cover, and a receiving groove is formed between the protrusion, the first reinforcing rib and the inner side wall of the end cover;

[0006] The left and right sides of the end cover are both formed with plugging edges, the raised positions are arranged one by one on the inner side of the plugging edges, and a slot is formed between the raised positions and the plugging edges;

[0007] The slot is plugged and fitted with a terminal and an elastic sheet, the outer end of the terminal extends out of the end cover, the side of the terminal is attached to the elastic sheet, and the inner end of the elastic sheet is fixedly fitted with a carbon brush.

[0008] Furthermore: the ends of the plug-in edge and the protruding position are both formed with chamfers, and the chamfers are located at the edges on both sides of the ends of the slot.

[0009] Furthermore: second reinforcing ribs are formed at both upper and lower ends of the end cover, the first reinforcing rib and the second reinforcing rib are arranged perpendicular to each other, and a supporting edge is integrally formed between the middle part of the second reinforcing rib and the inner side surface of the end cover.

[0010] Further: both left and right sides of the end cover are formed with wire grooves, and the inner ends of the wire grooves are connected to the receiving grooves.

[0011] Furthermore: the inner end of the terminal is formed with a right-angled side, and the right-angled side covers the raised position.

[0012] Furthermore: a through hole is formed on the right-angled edge, a threaded hole is formed on the end face of the protrusion, a bolt is installed in the through hole, and the inner end of the bolt is spirally locked in the threaded hole.

[0013] Furthermore: two protrusions are formed on the inner side of the terminal, and two positioning holes are formed on the elastic sheet, and the protrusions are installed in the positioning holes with clearance fit.

[0014] Furthermore: a square hole is formed at the inner end of the elastic sheet, elastic arms are formed on both sides of the square hole, one end of the carbon brush is inserted into the square hole with clearance, and the elastic arms on both sides press the end of the carbon brush into the square hole.

[0015] Furthermore: both edges of the elastic sheet near one end of the carbon brush are bent outward to form right-angled reinforced edges.

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

[0017] 1. The structure of the slot is formed by the raised position and the plug-in edge. After the terminal and the elastic sheet are fitted together, they can be inserted into the slot together for fixation, so as to achieve accurate positioning of the terminal and the elastic sheet;

[0018] 2. The first reinforcing rib is provided to enhance the strength of the raised part so that the slot will not be deformed, thereby ensuring the stable assembly of the terminal and the elastic sheet;

[0019] 3. When the motor is working, the elastic sheet will drive the carbon brush to press against the commutator of the rotor. Since the elastic sheet is installed very firmly, the carbon brush can always press against the commutator to achieve stable circuit connection without position deviation and poor contact.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of the explosion structure of the utility model.

[0024] As shown in the figure: 1. End cover; 2. Raised position; 3. First reinforcing rib; 4. Plug-in edge; 5. Terminal; 6. Elastic sheet; 7. Carbon brush; 8. Chamfer; 9. Second reinforcing rib; 10. Support edge; 11. Wire groove; 12. Right-angle edge; 13. Through hole; 14. Threaded hole; 15. Bolt; 16. Bump; 17. Positioning hole; 18. Square hole; 19. Elastic arm; 20. Right-angle reinforcing edge. DETAILED DESCRIPTION

[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] The components of the embodiments of the present invention generally described and shown in the drawings herein 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 invention, but merely represents selected embodiments of the present invention.

[0027] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figure 1-2 As shown, a motor cover of the utility model comprises an end cover 1, wherein both left and right ends of the end cover 1 are formed with protrusions 2, a first reinforcing rib 3 is integrally formed between one side of the protrusion 2 and the end cover 1, and a receiving groove is formed between the protrusion 2, the first reinforcing rib 3 and the inner side wall of the end cover 1;

[0031] The left and right sides of the end cover 1 are formed with plugging edges 4, and the protrusions 2 are arranged one by one on the inner side of the plugging edges 4, and a slot is formed between the protrusions 2 and the plugging edges 4;

[0032] The slot is plugged with a terminal 5 and an elastic sheet 6, the outer end of the terminal 5 extends out of the end cover 1, the side of the terminal 5 is attached to the elastic sheet 6, and the inner end of the elastic sheet 6 is fixed with a carbon brush 7;

[0033] The principle is: the structure of the slot is formed by utilizing the raised position 2 and the plug-in edge 4, and the terminal 5 and the elastic sheet 6 can be inserted into the slot together for fixation after being fitted to each other, thereby realizing the precise positioning of the terminal 5 and the elastic sheet 6, and at the same time, a first reinforcing rib 3 is provided to enhance the strength of the raised position 2 so that the slot will not be deformed, thereby ensuring the stable assembly of the terminal 5 and the elastic sheet 6. When the motor is working, the elastic sheet 6 will drive the carbon brush 7 to press against the commutator of the rotor. Since the installation of the elastic sheet 6 is very firm, the carbon brush 7 can always press against the commutator to realize stable circuit connection, and there will be no positional displacement or poor contact.

[0034] Furthermore: the ends of the plug-in edge 4 and the protruding position 2 are both formed with chamfered corners 8, and the chamfered corners 8 are located at the edges on both sides of the end of the slot; it is convenient to insert the terminal 5 and the elastic sheet 6 into the slot.

[0035] Furthermore: second reinforcing ribs 9 are formed at both upper and lower ends of the end cover 1, the first reinforcing ribs 3 and the second reinforcing ribs 9 are arranged perpendicular to each other, and a supporting edge 10 is integrally formed between the middle part of the second reinforcing rib 9 and the inner side surface of the end cover 1; the first reinforcing ribs 3 and the second reinforcing ribs 9 can ensure the strength of the end cover 1, so that the motor is not easily damaged during high-intensity use.

[0036] Furthermore: both sides of the end cover 1 are formed with wire grooves 11, and the inner ends of the wire grooves 11 are connected to the receiving grooves; after wiring on the terminals 5, the wires can be directly output from the end cover 1 along the wire grooves 11, thereby facilitating the wiring and use of the motor.

[0037] Furthermore: the inner end of the terminal 5 is formed with a right-angled edge 12, and the right-angled edge 12 covers the raised position 2; the right-angled edge 12 can be used to press the terminal 5 together with the elastic sheet 6 into the slot to achieve a quick assembly effect.

[0038] Furthermore: a through hole 13 is formed on the right-angled edge 12, a threaded hole 14 is formed on the end face of the raised position 2, a bolt 15 is installed in the through hole 13, and the inner end of the bolt 15 is screwed and locked in the threaded hole 14; after the terminal 5 and the elastic sheet 6 are installed, the bolt 15 can be locked in the threaded hole 14 of the raised position 2 by passing through the through hole 13, thereby ensuring the stable installation of the terminal 5 and the elastic sheet 6 on the end cover 1.

[0039] Furthermore: two protrusions 16 are formed on the inner side of the terminal 5, and two positioning holes 17 are formed on the elastic sheet 6, and the protrusions 16 are installed in the positioning holes 17 with a clearance fit; this can prevent the elastic sheet 6 from rubbing against the side wall of the terminal 5, thereby effectively ensuring that the terminal 5 and the elastic sheet 6 are stably inserted into the slot, so that the elastic sheet 6 and the terminal 5 will not shift relative to each other, and the installation accuracy is higher.

[0040] Furthermore: a square hole 18 is formed at the inner end of the elastic sheet 6, and elastic arms 19 are formed on both sides of the square hole 18. One end of the carbon brush 7 is inserted into the square hole 18 with a clearance fit, and the elastic arms 19 on both sides press the end of the carbon brush 7 into the square hole 18; this can facilitate the stable installation of the carbon brush 7 on the elastic arms 19.

[0041] Furthermore: both edges of the elastic sheet 6 near one end of the carbon brush 7 are bent outward to form a right-angle reinforcement edge 20; the use strength of the elastic sheet 6 can be effectively enhanced, so that the elastic sheet 6 will not bend or deform after long-term use, and the service life is improved.

[0042] This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model are within the protection scope of the technical solution of the utility model.

Claims

1. A motor cover, including an end cover, characterized in that: The left and right ends of the end cover are both formed with protrusions, a first reinforcing rib is integrally formed between one side of the protrusion and the end cover, and a receiving groove is formed between the protrusion, the first reinforcing rib and the inner side wall of the end cover; The left and right sides of the end cover are both formed with plugging edges, the raised positions are arranged one by one on the inner side of the plugging edges, and a slot is formed between the raised positions and the plugging edges; The slot is plugged and fitted with a terminal and an elastic sheet, the outer end of the terminal extends out of the end cover, the side of the terminal is attached to the elastic sheet, and the inner end of the elastic sheet is fixedly fitted with a carbon brush.

2. The motor cover according to claim 1, characterized in that: The ends of the plug-in edge and the protruding position are both formed with chamfered corners, and the chamfered corners are located at the edges on both sides of the end of the slot.

3. The motor cover according to claim 1, characterized in that: Second reinforcing ribs are formed at both upper and lower ends of the end cover, the first reinforcing rib and the second reinforcing rib are perpendicularly arranged to each other, and a supporting edge is integrally formed between the middle portion of the second reinforcing rib and the inner side surface of the end cover.

4. The motor cover according to claim 1, characterized in that: The left and right sides of the end cover are both formed with wire grooves, and the inner ends of the wire grooves are connected to the accommodating grooves.

5. The motor cover according to claim 1, characterized in that: The inner end of the terminal is formed with a right-angled side, and the right-angled side covers the protruding position.

6. The motor cover according to claim 5, characterized in that: A through hole is formed on the right-angled edge, a threaded hole is formed on the end surface of the protruding position, a bolt is installed in the through hole, and the inner end of the bolt is spirally locked in the threaded hole.

7. The motor cover according to claim 1, characterized in that: Two convex points are formed on the inner side of the terminal, and two positioning holes are formed on the elastic sheet. The convex points are installed in the positioning holes with clearance fit.

8. The motor cover according to claim 1, characterized in that: A square hole is formed at the inner end of the elastic sheet, and elastic arms are formed on both sides of the square hole. One end of the carbon brush is inserted into the square hole with clearance fit, and the elastic arms on both sides press the end of the carbon brush into the square hole.

9. The motor cover according to claim 1, characterized in that: Both edges of the elastic sheet close to one end of the carbon brush are bent outward to form right-angled reinforced edges.

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