Single-reinforcing-ring commutator of automobile starting motor

Abstract

The utility model relates to the technical field of commutators, in particular to a single-reinforcing-ring commutator of an automobile starting motor. Comprising a bakelite powder main body and a reinforcing mechanism, the reinforcing mechanism comprises a reinforcing cover plate, a plurality of abutting columns, a plurality of fixing rods and a plurality of springs, and an insulating reinforcing ring is installed at the bottom of the bakelite powder main body, so that after the insulating reinforcing ring is clamped in reinforcing grooves of a plurality of commutator segments, fixing holes of each commutator segment correspond to sliding holes respectively, and the commutator segments are fixed in the reinforcing grooves. A reinforcing cover plate is clamped on one surface, far away from the bakelite powder main body, of the insulating reinforcing ring, and when the reinforcing cover plate slides in the annular groove, a force is applied to a second inclined surface on an abutting column through a first inclined surface, so that the abutting column slides in a sliding hole, and a fixed rod is driven to move towards the direction of a corresponding commutator segment; and the end parts of the fixing rods are clamped into the corresponding fixing holes, so that the plurality of commutator segments are installed on the insulating reinforcing ring more firmly, and the overall structure of the commutator is firmer.

Description

Technical Field

[0001] The utility model relates to the technical field of commutators, in particular to a single reinforcement ring commutator for a starting motor of an automobile. Background Art

[0002] Commutators are widely used in power tools. In order to improve the mechanical strength and overspeed performance of the commutator, some commutators with high speed requirements usually use upper and lower reinforcement rings to reinforce the commutator segments. The upper and lower reinforcement rings are respectively arranged at the upper and lower ends of the commutator segments, which increases the overall cost of the commutator.

[0003] To solve the above problems, the prior art patent publication number (CN214673376U) discloses a single reinforcement ring commutator for an automobile starter motor, comprising a bakelite powder body and a spring bushing, wherein a plurality of commutator segments are evenly embedded in the outer ring of the bakelite powder body, wherein the commutator segments include a long strip portion, wherein a step portion is provided at one end of the upper side of the long strip portion, arc grooves are symmetrically provided on both sides of the step portion, and a copper foot portion is provided on the lower side of the long strip portion, wherein a first extension portion and a transition groove are provided on the side of the copper foot portion facing the step portion, and a second extension portion and a reinforcement groove are provided on the side of the copper foot portion away from the step portion, wherein an insulating reinforcement ring is provided in the reinforcement groove, wherein a distance between the end face of the first extension portion and the center of the long strip portion is greater than a distance between the end face of the second extension portion and the center of the long strip portion, and a distance between the bottom of the transition groove and the center of the long strip portion is greater than a distance between the bottom of the reinforcement groove and the center of the long strip portion; the technical solution has the advantages of simple structure, reasonable design, low production cost, high mechanical strength, strong overspeed performance, and long service life.

[0004] However, the fixing structure between the single reinforcement ring and the multiple commutator segments in the existing single reinforcement ring commutator of the automobile starter motor is not strong enough, resulting in the overall structure of the commutator being not strong enough. Utility Model Content

[0005] The purpose of the utility model is to provide a single reinforcement ring commutator for an automobile starter motor, aiming to solve the technical problem that the fixing structure between the single reinforcement ring and multiple commutator segments in the existing single reinforcement ring commutator for an automobile starter motor is not strong enough, resulting in the overall structure of the commutator being not strong enough.

[0006] To achieve the above-mentioned purpose, the utility model provides a single reinforcement ring commutator for a car starter motor, comprising a bakelite powder body and a reinforcement mechanism, wherein a spring bushing is arranged inside the bakelite powder body, and a plurality of commutator segments are evenly embedded in the outer ring of the bakelite powder body, wherein the commutator segments comprise a long strip portion, wherein a step portion is arranged at one end of the upper side of the long strip portion, arc grooves are symmetrically arranged on both sides of the step portion, and a copper foot portion is arranged at the lower side of the long strip portion, wherein a first extension portion is arranged on the copper foot portion facing the step portion, and a transition groove for filling bakelite powder of the bakelite powder body is formed between the first extension portion and the long strip portion, wherein a second extension portion is arranged on the side of the copper foot portion away from the step portion, and a reinforcement groove is formed between the second extension portion and the long strip portion, and an insulating reinforcement ring is arranged in the reinforcement groove, and the insulating reinforcement ring is located at the bottom of the bakelite powder body;

[0007] The reinforcement mechanism includes a reinforcement cover, a plurality of abutting columns, a plurality of fixing rods and a plurality of springs, wherein an annular groove is provided on a side of the insulating reinforcement ring away from the bakelite powder body, the reinforcement cover is clamped in the annular groove, a first inclined surface is provided on a side of the reinforcement cover located in the annular groove, a plurality of sliding holes are evenly provided on a side of the annular groove close to the commutator segment, each of the sliding holes corresponds to a commutator segment, the inside of each sliding hole is slidably provided with the abutting column, a second inclined surface is provided on a side of each abutting column close to the annular groove, the fixing rod is provided on a side of each abutting column away from the annular groove, the spring is provided between the abutting column and the inner wall of the sliding hole, the spring is provided on the outside of the fixing rod, one end of the fixing rod away from the abutting column passes through the side wall of the insulating reinforcement ring, and a fixing hole is provided on a side of each commutator segment close to the insulating reinforcement ring, and the fixing rod is adapted to the fixing hole.

[0008] Among them, each of the reinforcement cover plates includes an embedded ring and a cover plate body, the cover plate body is in contact with a side of the insulating reinforcement ring away from the bakelite powder body, and the embedded ring is fixedly provided on a side of the cover plate body close to the insulating reinforcement ring. The embedded ring is inserted into the annular groove, and the first inclined surface is provided on the embedded ring.

[0009] Wherein, a plurality of fixing blocks are arranged at the edge of the cover body, each of the fixing blocks is provided with a fixing screw, and the fixing screw is threadedly connected to the bottom of the insulating reinforcement ring.

[0010] Wherein, two pulling members are further arranged on a side of the cover body away from the insulating reinforcement ring, and the two pulling members are respectively located on two sides of the cover body.

[0011] The single reinforcement ring commutator of the automobile starter motor further comprises a plurality of protective covers, and a side of each fixing block away from the insulating reinforcement ring is clamped with the protective cover, and the protective cover is arranged outside the fixing screw.

[0012] Wherein, the outer side wall of each protective cover is provided with anti-slip grooves.

[0013] The utility model discloses a single reinforcement ring commutator for a car starter motor, wherein the insulating reinforcement ring is installed at the bottom of the bakelite powder body, so that after the insulating reinforcement ring is clamped in the reinforcement groove of a plurality of the commutator segments, the fixing hole of each commutator segment corresponds to a sliding hole respectively, and then the reinforcement cover is clamped on a side of the insulating reinforcement ring away from the bakelite powder body, and when the reinforcement cover slides in the annular groove, the first inclined surface applies force to the second inclined surface on the supporting column, so that the supporting column slides in the sliding hole, thereby driving the fixing rod to move in the direction of the corresponding commutator segment, so that the end of the fixing rod is clamped in the corresponding fixing hole, so that the plurality of commutator segments are more firmly mounted on the insulating reinforcement ring, and the overall structure of the entire commutator is more secure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 work.

[0015] Figure 1 The utility model is a schematic structural diagram of a single reinforcement ring commutator for a car starter motor according to the first embodiment of the utility model.

[0016] Figure 2 It is a cross-sectional view of the internal structure of a single reinforcement ring commutator of a car starter motor according to the first embodiment of the utility model.

[0017] Figure 3 The utility model provides Figure 2 A magnified view of the local structure at A.

[0018] Figure 4 It is a schematic structural diagram of the commutator segment in the first embodiment of the utility model.

[0019] Figure 5 It is a structural schematic diagram of the reinforced cover plate in the second embodiment of the utility model.

[0020] 101-bakelite powder body, 102-reinforcement cover, 103-support column, 104-fixing rod, 105-spring, 106-embedded ring, 107-cover body, 108-spring bushing, 109-commutator, 110-long strip, 111-step, 112-arc groove, 113-copper foot, 114-first extension, 115-transition groove, 116-second extension, 117-reinforcement groove, 118-insulating reinforcement ring, 119-annular groove, 120-first inclined surface, 121-sliding hole, 122-second inclined surface, 123-fixing hole, 124-fixing block, 125-fixing screw, 126-pulling piece, 201-protective cover, 202-anti-slip pattern. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0022] First embodiment:

[0023] See also Figures 1 to 4 ,in Figure 1 1 is a schematic structural diagram of a single reinforcement ring commutator for a car starter motor according to a first embodiment. Figure 2 This is a cross-sectional view of the internal structure of the single reinforcement ring commutator of the automobile starter motor of the first embodiment. Figure 3 yes Figure 2 The enlarged view of the local structure at A. Figure 4 It is a schematic diagram of the structure of the commutator segment in the first embodiment.

[0024] The utility model provides a single reinforcement ring commutator for a car starter motor: it includes a bakelite powder body 101 and a reinforcement mechanism, the reinforcement mechanism includes a reinforcement cover plate 102, a plurality of abutment columns 103, a plurality of fixing rods 104 and a plurality of springs 105, and each of the reinforcement cover plates 102 includes an embedded ring 106 and a cover plate body 107. The above-mentioned solution solves the problem that the fixing structure between the single reinforcement ring and the plurality of commutator segments 109 in the existing single reinforcement ring commutator for a car starter motor is not strong enough, resulting in the problem that the overall structure of the commutator is not strong enough. It can be understood that the above-mentioned solution can be used in the structure of the single reinforcement ring commutator for a car starter motor.

[0025] According to the present specific embodiment, a spring bushing 108 is provided in the bakelite powder body 101, and a plurality of commutator segments 109 are evenly embedded in the outer ring of the bakelite powder body 101. The commutator segments 109 include a long strip portion 110, and a step portion 111 is provided at one end of the upper side of the long strip portion 110. Arc grooves 112 are symmetrically provided on both sides of the step portion 111. A copper foot portion 113 is provided on the lower side of the long strip portion 110. A first extension portion 114 is provided on the side of the copper foot portion 113 facing the step portion 111. A transition groove 115 for filling the bakelite powder of the bakelite powder body 101 is formed between the first extension portion 114 and the long strip portion 110. A second extension portion 116 is provided on the side of the copper foot portion 113 away from the step portion 111. A reinforcement groove 112 is formed between the second extension portion 116 and the long strip portion 110. 7. An insulating reinforcement ring 118 is provided in the reinforcement groove 117, and the insulating reinforcement ring 118 is located at the bottom of the bakelite powder body 101. Since the first extension part 114 and the second extension part 116 are respectively provided on both sides of the copper foot part 113 of the commutator segment 109, the transition groove 115 and the reinforcement groove 117 with different depths are respectively formed between the first extension part 114, the second extension part 116 and the long strip part 110 of the commutator segment 109, so that the transition groove 115 is easier to be filled with bakelite powder to avoid looseness and pores. In addition, the insulating reinforcement ring 118 is provided in the reinforcement groove 117. On the premise of eliminating one reinforcement ring, the bonding force between the commutator segment 109 and the bakelite powder body 101 can be guaranteed, thereby improving the mechanical strength and service life of the commutator.

[0026] The insulating reinforcement ring 118 is provided with an annular groove 119 on one side away from the bakelite powder body 101, the reinforcement cover 102 is clamped in the annular groove 119, the reinforcement cover 102 is provided with a first inclined surface 120 on one side located in the annular groove 119, and the annular groove 119 is evenly provided with a plurality of sliding holes 121 on one side close to the commutator segment 109, each of the sliding holes 121 corresponds to one of the commutator segments 109, and the abutting column 103 is slidably provided inside each of the sliding holes 121 , each of the abutting columns 103 is provided with a second inclined surface 122 on one side close to the annular groove 119, each of the abutting columns 103 is provided with a fixing rod 104 on one side away from the annular groove 119, a spring 105 is provided between the abutting columns 103 and the inner wall of the sliding hole 121, and the spring 105 is provided outside the fixing rod 104, and one end of the fixing rod 104 away from the abutting columns 103 passes through the side wall of the insulating reinforcement ring 118, and each of the commutator segments 109 is close to the insulating reinforcement ring 1 The insulating reinforcement ring 118 is provided with a fixing hole 123 on one side of the commutator 109, and the fixing rod 104 is adapted to the fixing hole 123. The insulating reinforcement ring 118 is installed at the bottom of the bakelite powder body 101, so that the insulating reinforcement ring 118 is clamped in the reinforcement groove 117 of the plurality of commutator segments 109, so that the fixing hole 123 of each commutator segment 109 corresponds to one of the sliding holes 121, and the reinforcing cover plate 102 is clamped on the side of the insulating reinforcement ring 118 away from the bakelite powder body 101. When the cover plate 102 slides in the annular groove 119, the first inclined surface 120 applies force to the second inclined surface 122 on the supporting column 103, so that the supporting column 103 slides in the sliding hole 121, thereby driving the fixing rod 104 to move in the direction of the corresponding commutator segment 109, so that the end of the fixing rod 104 is inserted into the corresponding fixing hole 123, so that the multiple commutator segments 109 are more firmly installed on the insulating reinforcement ring 118, making the overall structure of the commutator more secure.

[0027] Secondly, the cover body 107 is fitted with a side of the insulating reinforcement ring 118 away from the bakelite powder body 101, and the cover body 107 is fixedly provided with the embedded ring 106 on a side close to the insulating reinforcement ring 118. The embedded ring 106 is inserted into the annular groove 119, and the first inclined surface 120 is provided on the embedded ring 106. The embedded ring 106 is fixedly connected to the cover body 107. When preparing the reinforced cover 102, it is made by one-piece molding technology, and the structure is more solid.

[0028] At the same time, a plurality of fixing blocks 124 are arranged at the edge of the cover body 107, and each of the fixing blocks 124 is provided with a fixing screw 125, and the fixing screw 125 is threadedly connected to the bottom of the insulating reinforcement ring 118. Through the arrangement of the fixing blocks 124 and the fixing screws 125, the reinforced cover 102 is more firmly installed on the insulating reinforcement ring 118.

[0029] In addition, two pulling members 126 are provided on one side of the cover body 107 away from the insulating reinforcement ring 118. The two pulling members 126 are respectively located on both sides of the cover body 107. The provision of the pulling members 126 makes it more convenient to disassemble and assemble the reinforced cover 102.

[0030] When using a single reinforcement ring commutator for a car starter motor of the present embodiment, since the first extension portion 114 and the second extension portion 116 are respectively arranged on both sides of the copper foot portion 113 of the commutator segment 109, the transition groove 115 and the reinforcement groove 117 of different depths are respectively formed between the first extension portion 114, the second extension portion 116 and the long strip portion 110 of the commutator segment 109, so that it is easier to fill the transition groove 115 with bakelite powder to avoid looseness and pores, and the insulating reinforcement ring 118 is arranged in the reinforcement groove 117, which can ensure the bonding force between the commutator segment 109 and the bakelite powder body 101 without one reinforcement ring, thereby improving the mechanical strength and service life of the commutator, and the insulating reinforcement ring 118 is installed at the bottom of the bakelite powder body 101, so that the insulating reinforcement ring 118 can be installed at the bottom of the bakelite powder body 101. After the ring 118 is clamped in the reinforcement groove 117 of the plurality of commutator segments 109, so that the fixing hole 123 of each commutator segment 109 corresponds to one of the sliding holes 121 respectively, the reinforcing cover plate 102 is clamped on the side of the insulating reinforcement ring 118 away from the bakelite powder body 101. When the reinforcing cover plate 102 slides in the annular groove 119, the second inclined surface 122 on the supporting column 103 is applied with force through the first inclined surface 120, so that the supporting column 103 slides in the sliding hole 121, thereby driving the fixing rod 104 to move toward the direction of the corresponding commutator segment 109, so that the end of the fixing rod 104 is clamped in the corresponding fixing hole 123, so that the plurality of commutator segments 109 are more firmly mounted on the insulating reinforcement ring 118, and the overall structure of the commutator is more secure.

[0031] Second embodiment:

[0032] Based on the first embodiment, please refer to Figure 5 , Figure 5 It is a schematic diagram of the structure of the reinforced cover plate in the second embodiment.

[0033] The utility model provides a single reinforcement ring commutator for a vehicle starter motor, which also includes a plurality of protective covers 201 .

[0034] According to this specific embodiment, the protective cover 201 is clamped on one side of each fixing block 124 away from the insulating reinforcement ring 118, and the protective cover 201 is arranged on the outside of the fixing screw 125. Through the setting of the protective cover 201, the fixing screw 125 is protected to avoid the external environment from affecting the fixing screw 125, thereby improving the service life of the fixing screw 125.

[0035] The outer side wall of each protection cover 201 is provided with anti-skid patterns 202 , and the anti-skid patterns 202 make it more convenient to disassemble and assemble the protection cover 201 .

[0036] When using a single reinforcement ring commutator of a car starter motor of this embodiment, the protective cover 201 is provided to protect the fixing screw 125, thereby preventing the fixing screw 125 from being affected by the external environment and increasing the service life of the fixing screw 125. In addition, the anti-slip pattern 202 is provided to make it more convenient to disassemble and assemble the protective cover 201.

[0037] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. A single reinforcement ring commutator for a car starter motor, comprising a bakelite powder body, a spring bushing arranged inside the bakelite powder body, a plurality of commutator segments evenly embedded in the outer ring of the bakelite powder body, the commutator segments comprising a long strip portion, a step portion arranged at one end of the upper side of the long strip portion, arc grooves symmetrically arranged on both sides of the step portion, a copper foot portion arranged at the lower side of the long strip portion, a first extension portion arranged on the copper foot portion facing the step portion, a transition groove for filling bakelite powder of the bakelite powder body is formed between the first extension portion and the long strip portion, a second extension portion is arranged on the side of the copper foot portion away from the step portion, a reinforcement groove is formed between the second extension portion and the long strip portion, an insulating reinforcement ring is arranged in the reinforcement groove, and the insulating reinforcement ring is located at the bottom of the bakelite powder body, characterized in that It also includes a reinforcement mechanism; The reinforcement mechanism includes a reinforcement cover, a plurality of abutting columns, a plurality of fixing rods and a plurality of springs, wherein an annular groove is provided on a side of the insulating reinforcement ring away from the bakelite powder body, the reinforcement cover is clamped in the annular groove, a first inclined surface is provided on a side of the reinforcement cover located in the annular groove, a plurality of sliding holes are evenly provided on a side of the annular groove close to the commutator segment, each of the sliding holes corresponds to a commutator segment, the inside of each sliding hole is slidably provided with the abutting column, a second inclined surface is provided on a side of each abutting column close to the annular groove, the fixing rod is provided on a side of each abutting column away from the annular groove, the spring is provided between the abutting column and the inner wall of the sliding hole, the spring is provided on the outside of the fixing rod, one end of the fixing rod away from the abutting column passes through the side wall of the insulating reinforcement ring, and a fixing hole is provided on a side of each commutator segment close to the insulating reinforcement ring, and the fixing rod is adapted to the fixing hole.

2. The single reinforcement ring commutator for the automobile starter motor as claimed in claim 1, characterized in that: Each of the reinforcement covers includes an embedded ring and a cover body. The cover body is in contact with a side of the insulating reinforcement ring away from the bakelite powder body. The embedded ring is fixedly provided on a side of the cover body close to the insulating reinforcement ring. The embedded ring is inserted into the annular groove, and the first inclined surface is provided on the embedded ring.

3. The single reinforcement ring commutator for the automobile starter motor as claimed in claim 2, characterized in that: A plurality of fixing blocks are arranged at the edge of the cover body, each of the fixing blocks is provided with a fixing screw, and the fixing screw is threadedly connected to the bottom of the insulating reinforcement ring.

4. The single reinforcement ring commutator for the automobile starter motor as claimed in claim 3, characterized in that: Two pulling members are also arranged on a side of the cover body away from the insulating reinforcement ring, and the two pulling members are respectively located on two sides of the cover body.

5. The single reinforcement ring commutator for the automobile starter motor as claimed in claim 4, characterized in that: The single reinforcement ring commutator of the automobile starter motor also includes a plurality of protective covers. The protective cover is clamped on a side of each fixing block away from the insulating reinforcement ring, and the protective cover is arranged outside the fixing screw.

6. The single reinforcement ring commutator for the automobile starter motor as claimed in claim 5, characterized in that: The outer side wall of each protective cover is provided with anti-slip grooves.

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