Commutator segment and commutator for miniature hollow cup

Abstract

The commutator segment comprises a segment main body, the upper part of the segment main body is provided with an arc-shaped protruding part, the lower part of the segment main body is provided with a plane part, and the included angle between the side wall of the segment main body and the plane part is an obtuse angle; wherein the sheet body main body is further provided with a locking groove and reinforcing parts, the locking groove penetrates through the sheet body main body in the axis direction of the arc-shaped protruding part, and the reinforcing parts are arranged on the two side walls of the sheet body main body. According to the utility model, the locking groove and the reinforcing part are arranged on the sheet main body, the connection strength of the sheet main body and the bakelite is improved due to the arrangement of the locking groove, and the reinforcing part is arranged on the side wall of the sheet main body, so that the contact area of the bakelite and the sheet main body is increased, and the stability of the product is further enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of commutators, and in particular relates to a commutator segment for a micro hollow cup and a commutator. Background Art

[0002] The motor commutator is an important component used in DC motors. It can reverse the direction of current, thereby changing the direction of the magnetic field of the electrode and further changing the direction of movement of the rotor.

[0003] The existing commutator segments are usually shaped, such as the application number CN202322869243.6 discloses a shaped commutator, the commutator segments disclose arc segments and dovetails, the dovetails are embedded in the base, and improve its stability and reliability. However, in the micro hollow cup, the commutator segments are very small, and the processing of the dovetails is more difficult, resulting in increased production costs. Therefore, a commutator segment or commutator with a simple structure, easy processing, and suitable for micro hollow cup motors is needed. Utility Model Content

[0004] In order to solve the above technical problems, the utility model discloses a commutator segment and a commutator for a micro hollow cup, which simplifies the structure of the commutator segment while ensuring product stability, thereby reducing the production cost of the commutator segment.

[0005] Specifically, the utility model discloses a commutator segment for a micro hollow cup, comprising:

[0006] The sheet body has an arc-shaped protruding portion on the top and a flat portion on the bottom, and the angle between the side wall of the sheet body and the flat portion is an obtuse angle; wherein,

[0007] The sheet body is further provided with a locking groove and a reinforcement portion. The locking groove penetrates the sheet body along the axis direction of the arc-shaped protruding portion, and the reinforcement portion is arranged on two side walls of the sheet body.

[0008] By adopting the above scheme, a locking groove and a reinforcement part are opened on the sheet body. The setting of the locking groove improves the connection strength between the sheet body and the bakelite. The reinforcement part is arranged on the side wall of the sheet body, which increases the contact area between the bakelite and the sheet body, and further enhances the stability of the product.

[0009] Furthermore, the locking grooves are provided on two sides of the sheet body, and the two locking grooves are symmetrically arranged.

[0010] By adopting the above solution, the symmetrically arranged locking grooves make the pulling forces on both sides of the sheet body consistent, so that the sheet body remains stable during operation.

[0011] Furthermore, the transverse cross-section of the locking groove is V-shaped, including a first inclined surface and a second inclined surface, and the angle between the first inclined surface and the second inclined surface is 60°-150°.

[0012] Furthermore, the included angle between the first inclined surface and the adjacent side wall is 90°-150°, and the included angle between the second inclined surface and the adjacent side wall is 90°-150°.

[0013] By adopting the above solution, the V-shaped locking groove increases the contact area between the sheet body and the bakelite, allowing the bakelite to be stuck in the locking groove, and the angle between the two inclined surfaces of the locking groove and the angle between the two inclined surfaces and the side wall determine the connection stability between the sheet body and the bakelite.

[0014] Furthermore, the transverse cross-section of the locking groove is arc-shaped.

[0015] By adopting the above solution, the arc-shaped locking groove increases the contact area between the sheet body and the bakelite, so that the bakelite is stuck in the locking groove, thereby enhancing the stability of the product.

[0016] Furthermore, the reinforcement part is a plurality of inwardly concave cones, and the axis of the reinforcement part is perpendicular to the side wall.

[0017] Furthermore, the reinforcement portion is a plurality of inwardly concave arc grooves, and the axis of the reinforcement portion is parallel to the side wall.

[0018] By adopting the above solution, the cone and the arc groove are arranged on the side wall of the sheet body, and the bakelite is poured into the reinforcement part along the side wall, thereby increasing the contact area between the sheet body and the bakelite, and forming a clamping angle with the bakelite, thereby enhancing the stability of the product.

[0019] In addition, the utility model also discloses a commutator, comprising any one of the above-mentioned commutator segments for micro hollow cups.

[0020] The beneficial effects of the utility model are:

[0021] 1. Simple structure, easy to process, and low production cost;

[0022] 2. The setting of the locking groove and the reinforcement part improves the connection strength between the sheet body and the bakelite and enhances the stability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments or the description of the prior art will be briefly introduced below.

[0024] Figure 1 is a cross-sectional view of the commutator;

[0025] Figure 2 It is a cross-sectional view of the commutator segment locking groove;

[0026] Figure 3 is a cross-sectional view of another embodiment of a commutator segment locking groove;

[0027] Figure 4 is a cross-sectional view of a commutator segment reinforcement portion;

[0028] Figure 5 This is the F-direction view of the commutator segment reinforcement portion;

[0029] Figure 6 is a cross-sectional view of another embodiment of a commutator segment reinforcement portion;

[0030] Figure 7 This is a view of another embodiment of the commutator segment reinforcement portion viewed from the F direction.

[0031] The reference numerals in the drawings are as follows: sheet body 1 , arc-shaped protruding portion 11 , flat portion 12 , side wall 13 , locking groove 14 , first inclined surface 141 , second inclined surface 142 , reinforcing portion 15 , bakelite 2 . DETAILED DESCRIPTION

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0033] like Figure 1-7 As shown, the utility model discloses a commutator segment for a micro hollow cup, comprising:

[0034] The sheet body 1 has an arc-shaped protruding portion 11 on the upper side and a flat portion 12 on the lower side, and the angle between the side wall 13 of the sheet body 1 and the flat portion 12 is an obtuse angle; wherein,

[0035] The sheet body 1 is further provided with a locking groove 14 and a reinforcement portion 15 . The locking groove 14 penetrates the sheet body 1 along the axis direction of the arc-shaped protruding portion 11 . The reinforcement portion 15 is provided on two side walls 13 of the sheet body 1 .

[0036] The utility model provides a locking groove 14 and a reinforcement part 15 on the sheet body 1. The setting of the locking groove 14 improves the connection strength between the sheet body 1 and the bakelite 2. The reinforcement part 15 is arranged on the side wall 13 of the sheet body 1, which increases the contact area between the bakelite 2 and the sheet body 1, and further enhances the stability of the product.

[0037] In some embodiments of the present invention, the locking grooves 14 are provided on both sides of the sheet body 1, and the two locking grooves 14 are symmetrically arranged. The symmetrically arranged locking grooves 14 make the pulling force on both sides of the sheet body 1 consistent, so that the sheet body 1 remains stable during operation and avoids the phenomenon of tilting due to force.

[0038] In some embodiments of the present invention, the transverse cross section of the locking groove 14 is V-shaped, including a first bevel 141 and a second bevel 142, and the angle between the first bevel 141 and the second bevel 142 is 60°-150°. When the depth and width of the locking groove 14 remain unchanged, the smaller the angle formed by the first bevel 141 and the second bevel 142, the smaller the thickness of the bakelite 2 in contact with the two sheet bodies 1, and the greater the risk of bakelite 2 breaking; the larger the angle formed by the first bevel 141 and the second bevel 142, the smaller the volume of bakelite 2 stuck in the sheet body 1, and the smaller the tension between bakelite 2 and the sheet body 1.

[0039] In some embodiments of the present invention, the angle between the first inclined surface 141 and the adjacent side wall 13 is 90°-150°, and the angle between the second inclined surface 142 and the adjacent side wall 13 is 90°-150°. In practical applications, different angles can be selected according to the requirements of different commutator segments.

[0040] In some embodiments of the present invention, the transverse cross section of the locking groove 14 is arc-shaped. The arc-shaped locking groove 14 increases the contact area between the sheet body and the bakelite 2, so that the bakelite 2 is inserted into the locking groove 14, thereby enhancing the stability of the product.

[0041] In some embodiments of the present invention, the reinforcing portion 15 is a plurality of inwardly concave cones, and the axis of the reinforcing portion 15 is perpendicular to the side wall 13 .

[0042] In some embodiments of the present invention, the reinforcement portion 15 is a plurality of inwardly concave arc-shaped grooves, and the axis of the reinforcement portion 15 is parallel to the side wall 13 .

[0043] The cone and the arc groove are arranged on the side wall 13 of the sheet body, and the bakelite 2 is cast along the side wall 13 into the reinforcement part 15, which increases the contact area between the sheet body and the bakelite 2 and forms a clamping angle with the bakelite 2, thereby enhancing the stability of the product.

[0044] In addition, the utility model also discloses a commutator, including the commutator segment for the micro hollow cup disclosed in any one of the above embodiments.

[0045] For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A commutator segment for a micro hollow cup, characterized in that: include: A sheet body (1), wherein the sheet body (1) has an arc-shaped protruding portion (11) on the top and a flat portion (12) on the bottom, and the angle between the side wall (13) of the sheet body (1) and the flat portion (12) is an obtuse angle; wherein: The sheet body (1) is also provided with a locking groove (14) and a reinforcement portion (15); the locking groove (14) penetrates the sheet body (1) along the axial direction of the arc-shaped protruding portion (11); and the reinforcement portion (15) is provided on two side walls (13) of the sheet body (1).

2. The commutator segment for a micro hollow cup according to claim 1, characterized in that: The locking grooves (14) are provided on both sides of the sheet body (1), and the two locking grooves (14) are symmetrically arranged.

3. The commutator segment for a micro hollow cup according to claim 2, characterized in that: The transverse cross section of the locking groove (14) is V-shaped, comprising a first inclined surface (141) and a second inclined surface (142), wherein the included angle between the first inclined surface (141) and the second inclined surface (142) is 60°-150°.

4. The commutator segment for a micro hollow cup according to claim 3, characterized in that: The included angle between the first inclined surface (141) and the adjacent side wall (13) is 90°-150°, and the included angle between the second inclined surface (142) and the adjacent side wall (13) is 90°-150°.

5. The commutator segment for a micro hollow cup according to claim 2, characterized in that: The transverse cross section of the locking groove (14) is arc-shaped.

6. The commutator segment for micro hollow cup according to claim 1, characterized in that: The reinforcement part (15) is a plurality of inwardly concave cones, and the axis of the reinforcement part (15) is perpendicular to the side wall (13).

7. The commutator segment for a micro hollow cup according to claim 1, characterized in that: The reinforcement part (15) is a plurality of inwardly concave arc-shaped grooves, and the axis of the reinforcement part (15) is parallel to the side wall (13).

8. A commutator, characterized in that: The present invention comprises a commutator segment for a micro hollow cup as described in any one of claims 1 to 7.

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