CN-114759707-B - Armature assembly and starter

CN114759707BCN 114759707 BCN114759707 BCN 114759707BCN-114759707-B

Abstract

The invention provides an armature assembly and a starter, and relates to the technical field of overload protection of the starter, so that the structure of the armature assembly is optimized to a certain extent, and the consistency of overload failure modes of the starter is ensured. The armature assembly comprises an iron core, an armature winding and an abutting piece, wherein the armature winding is wound on the iron core, a first accommodating space and a second accommodating space are respectively formed by surrounding two ends of the iron core, and the abutting piece is arranged in the first accommodating space and/or the second accommodating space and abuts against the armature winding.

Inventors

CHEN JINYU
LIU DONGDONG
WANG JIAN
LI WENKUI
ZHANG ZHIBIN
WANG JIANNING
MAO GUILONG

Assignees

锦州汉拿电机有限公司

Dates

Publication Date: 20260512
Application Date: 20220517

Claims (10)

1. An armature assembly is characterized by comprising an iron core, an armature winding and an abutting piece; the armature winding is wound on the iron core, a first accommodating space and a second accommodating space are respectively formed by surrounding two ends of the iron core, the abutting piece is arranged in the first accommodating space and/or the second accommodating space and abuts against the armature winding, centrifugal force is generated when the abutting piece rotates, and the pressure of the abutting piece on the armature winding is increased by the centrifugal force; When overload operation is carried out for a long time, the temperature of the iron core can be gradually increased, and the armature winding is tightly contacted with the iron core under the pressure action of the abutting piece, so that the armature winding is more easily fused, and the fusing point of the armature assembly is positioned at the position where the abutting piece is arranged; And after the insulation sheath wrapped outside the armature winding is melted, the internal copper wires are exposed and are contacted with the iron core or the abutting piece, so that a short circuit is generated at a corresponding position.
2. The armature assembly of claim 1, further comprising a commutator and a retaining ring, the retaining ring being strapped to an outer side of the armature winding, the commutator being connected to the armature winding by the retaining ring, and the commutator being located on a side where the first receiving space is formed.
3. The armature assembly of claim 2, further comprising an armature shaft, wherein the armature shaft, the commutator, and the core are all connected to the armature shaft, and wherein an axis of the armature shaft is collinear with an axis of the commutator and an axis of the core.
4. The armature assembly of claim 1, wherein the abutment is in a closed loop configuration and the abutment in a closed loop configuration is placed into the first and/or second receiving space before twisting of the armature winding.
5. The armature assembly of claim 1, wherein the abutment member is in a non-closed annular structure, and the abutment member in a non-closed annular structure is placed in the first accommodation space and/or the second accommodation space after twisting the armature winding.
6. The armature assembly of claim 1, wherein the first receiving space has a frustoconical configuration, and the outer diameter of the abutment is the same as the maximum diameter of the first receiving space; the second accommodation space is of a cylindrical groove structure, and the outer diameter of the abutting piece is the same as the diameter of the second accommodation space.
7. The armature assembly of claim 1, wherein the abutment is made of a metallic conductive material.
8. The armature assembly of claim 1, wherein the core includes a plurality of core sheets stacked one on another, the plurality of core sheets each including a plurality of receiving slots having openings opened in a circumferential direction of the core sheets, the armature winding being disposed in the receiving slots.
9. A starter comprising a motor employing the armature assembly of any one of claims 1-8, further comprising a battery, a switch, a coil assembly, a pull-in assembly, a first contact end, a second contact end, and a fuse link; the positive electrode of the storage battery is respectively contacted with one end of the switch and the first contact end, and the other end of the switch is connected with the coil assembly; The coil assembly is wound on the matching piece, and the matching piece can move relative to the coil assembly so as to enable the sucking piece to move towards the direction approaching to the first contact end and the second contact end; the second contact end is connected with the second contact end and one end of the fusing rod respectively, and the other end of the fusing rod is connected with the motor.
10. The starter according to claim 9, wherein the coil assembly includes a holding coil and a pull-up coil, one end of the switch remote from the battery is connected to one end of the holding coil and one end of the pull-up coil, respectively, the other end of the holding coil is grounded, and the other end of the pull-up coil is connected to the second contact end.

Description

Armature assembly and starter Technical Field The invention relates to the technical field of overload protection of a starter, in particular to an armature assembly and a starter. Background The overload protection of the starter is to break the starter circuit, mainly through the fusing of the fusing rod of the brush holder, and the fusing rod needs to generate large current, and the reason for the large current is short circuit of the internal circuit of the starter. However, because the failure modes are inconsistent when the existing starter is overloaded, the failure points cannot be determined manually, so that the risk of products is high, and when the overload current of the starter is low, the heat generating speed of the armature is lower than the heat radiating speed, so that the starter is not easy to short, the starter runs for a long time and has ablation risk, and because the existing armature winding is protected by insulating paint, the short circuit is difficult to realize by self. Accordingly, there is an urgent need to provide an armature assembly and a starter to solve the problems in the prior art to some extent. Disclosure of Invention The invention aims to provide an armature assembly and a starter, so that the armature assembly structure is optimized to a certain extent, and the consistency of overload failure modes of the starter is ensured. The invention provides an armature assembly, which comprises an iron core, an armature winding and an abutting piece, wherein the armature winding is wound on the iron core, a first accommodating space and a second accommodating space are respectively formed by surrounding two ends of the iron core, and the abutting piece is arranged in the first accommodating space and/or the second accommodating space and abuts against the armature winding. The armature assembly further comprises a rectifier and a fixing ring, wherein the fixing ring is bound on the outer side of the armature winding, the rectifier is connected with the armature winding through the fixing ring, and the rectifier is located on one side forming the first accommodating space. Specifically, the armature assembly provided by the invention further comprises an armature shaft, wherein the armature shaft, the commutator and the iron core are all connected with the armature shaft, and the axis of the armature shaft is collinear with the axis of the commutator and the axis of the iron core. Further, the abutting piece is of a closed annular structure, and the abutting piece of the closed annular structure is placed into the first accommodating space and/or the second accommodating space before twisting the armature winding. The abutting piece is of a non-closed annular structure, and the abutting piece of the non-closed annular structure is placed in the first accommodating space and/or the second accommodating space after the armature winding is twisted. Specifically, the first accommodating space is in a truncated cone-shaped structure, the outer diameter of the abutting piece is the same as the maximum diameter of the first accommodating space, the second accommodating space is in a cylindrical groove-shaped structure, and the outer diameter of the abutting piece is the same as the diameter of the second accommodating space. Further, the abutment is made of a metallic conductive material. Still further, the iron core includes a plurality of iron core pieces that pile up in proper order, and a plurality of iron core pieces all include a plurality of along the circumference of iron core piece is seted up has open holding tank, armature winding set up in the holding tank. Compared with the prior art, the armature assembly provided by the invention has the following advantages: The armature assembly comprises an iron core, an armature winding and an abutting piece, wherein the armature winding is wound on the iron core, a first accommodating space and a second accommodating space are respectively formed by surrounding two ends of the iron core, and the abutting piece is arranged in the first accommodating space and/or the second accommodating space and abuts against the armature winding. From this analysis, it is found that since the core rotates during operation of the motor, the armature winding wound around the core rotates along with the core. The armature winding is arranged in the first accommodating space and the second accommodating space which are respectively formed at the two ends of the iron core, and the abutting piece is arranged in the first accommodating space and/or the second accommodating space, so that when the iron core drives the armature winding to rotate, the abutting piece can be driven to rotate. In the application, the abutting piece is abutted against the armature winding in the first accommodating space and the second accommodating space, and the rotation of the abutting piece can generate centrifugal force, so that the pressure of the abutting piece on the