Armature for automobile starter
By designing heat dissipation grooves and heat dissipation through holes in the car starter armature, the high temperature problem caused by high-speed rotation is solved, extending the service life of the armature and reducing costs.
Patent Information
- Application Number
- CN202420146872.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-22
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-22
AI Technical Summary
The car starter generates high temperatures in a high-speed rotation state, resulting in a shortening of the armature service life and increasing the cost of use.
An armature for a car starter is designed, including an iron core, axle, a commutator and a reinforcement ring. The inner armature is realized by setting a heat sink inside the positioning ring and a heat dissipation through hole inside the commutator. The heat dissipation of the coil can reduce frictional heat generation and improve natural heat dissipation effect.
It effectively improves the cooling effect of the armature, extends the service life and reduces the cost of use.
Smart Images
Figure CN222169438U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of starter armatures, in particular to an armature used for an automobile starter. Background Art
[0002] The car starter can convert the battery's electrical energy into mechanical energy, drive the engine flywheel to rotate and start the engine. There is an important component in the starter, namely the armature, which plays a key and pivotal role in the process of the motor realizing the mutual conversion of mechanical energy and electrical energy. For the starter, it is a component that generates electromotive force, such as the rotor in a DC generator and the stator in an AC generator.
[0003] In actual application, the current armature structure will generate high temperature when the car rotates at high speed. Long-term high temperature will reduce the service life of the armature, thereby indirectly increasing the cost of use; therefore, technical personnel in this field provide an armature for a car starter to solve the problems raised in the above background technology. Utility Model Content
[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.
[0005] Therefore, the purpose of the utility model is to provide an armature for an automobile starter to solve the problem raised in the above background technology that the current armature structure will generate high temperature when the automobile rotates at high speed, and long-term high temperature will reduce the service life of the armature, thereby indirectly increasing the cost of use.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an armature for an automobile starter, comprising an iron core, a shaft, a commutator and a reinforcement ring, wherein the central portion of the iron core has a positioning ring for sleeve-positioning the shaft and the commutator, the reinforcement ring is sleeved on the outside of the commutator and fixed to the end of the iron core, the front end of the shaft is sleeved in the inner ring hole of the commutator, and the shaft is respectively interference-fitted with the positioning ring and the commutator, the inner circumference of the positioning ring has a heat dissipation groove extending through the front and rear ends of the positioning ring, and the inner circumference of the commutator has a heat dissipation through hole extending through the front and rear ends of the commutator.
[0007] As a preferred solution of the armature for automobile starter described in the utility model, wherein the iron core is axially one circle and is located outside the positioning ring and also has a coil winding position for winding the coil.
[0008] As a preferred solution of the armature for automobile starter described in the utility model, a circle outside the middle section of the shaft is provided with a knurled surface which forms an interference fit with the positioning ring and the commutator respectively.
[0009] As a preferred solution of the armature for automobile starter described in the utility model, the inner side wall of the reinforcement ring has a avoidance groove penetrating the front and rear ends of the reinforcement ring, and the avoidance groove matches and corresponds to the heat dissipation groove.
[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the armature used for the automobile starter is provided with a heat dissipation groove that is connected from end to end on the inner diameter surface of the positioning ring, so that the inner wall of the ring body has a plurality of non-contact surfaces, and the heat inside the armature and the coil can be dissipated from both ends of the armature through the heat dissipation grooves on the non-contact surface, respectively, and has a good heat dissipation and cooling effect; at the same time, by providing a plurality of heat dissipation through holes that are connected from end to end in a circumferential circle inside the commutator, it can not only dissipate the heat of the commutator itself to the outside, but also naturally dissipate the heat inside the armature to the outside, and the natural heat dissipation effect of the armature can be effectively improved by mutual cooperation, thereby reducing the use cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the overall external structure of the utility model;
[0012] Figure 2 This is a schematic diagram of the matching structure of the iron core and the reinforcing ring hole groove of the utility model;
[0013] Figure 3 This is a schematic diagram of the structure of the commutator of the utility model;
[0014] Figure 4 This is a schematic diagram of the shaft structure of the utility model.
[0015] In the figure: 10, iron core; 11, positioning ring; 11a, heat dissipation groove; 12, coil winding position; 20, shaft; 21, knurled surface; 30, commutator; 31, heat dissipation through hole; 40, reinforcement ring; 41, avoidance groove. DETAILED DESCRIPTION
[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.
[0017] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.
[0018] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.
[0019] Figure 1-Figure 4 The figure shows the entire structure of the armature of the utility model for automobile starter. Figure 1-Figure 4 The armature for the automobile starter of this embodiment includes an iron core 10, a shaft 20, a commutator 30 and a reinforcement ring 40. The center of the iron core 10 has a positioning ring 11 for sleeve-positioning the shaft 20 and the commutator 30. The reinforcement ring 40 is sleeved on the outside of the commutator 30 and fixed to the end of the iron core 10. The front end of the shaft 20 is sleeved in the inner ring hole of the commutator 30, and the shaft 20 is respectively interference-fitted with the positioning ring 11 and the commutator 30. The inner circumferential circle of the positioning ring 11 has a heat dissipation groove 11a penetrating the head and tail ends of the positioning ring 11, and the inner circumferential circle of the commutator 30 has a heat dissipation through hole 31 penetrating the head and tail ends of the commutator 30.
[0020] The iron core 10 is axially rotated in one circle and is located outside the positioning ring 11 and also has a coil winding position 12 for winding the coil. Since the central part of the armature structure will generate a higher temperature when the starter runs at high speed, the present embodiment arranges a heat dissipation groove 11a that runs through the inner diameter surface of the positioning ring 11 in one circle, so that the inner wall of the ring body has a plurality of non-contact surfaces. The heat inside the armature and the coil can be dissipated from both ends of the armature through the heat dissipation groove 11a on the non-contact surface, which has a good heat dissipation and cooling effect.
[0021] A knurled surface 21 is provided on the outer side of the middle section of the shaft rod 20 to form an interference fit with the positioning ring 11 and the commutator 30 respectively. The knurled surface 21 can effectively increase the interference between the shaft rod 20 and the positioning ring 11 and the commutator 30, thereby reducing the speed and frequency of relative rotation between the shaft bodies, thereby reducing the heat generation caused by high-speed rotation friction, which is beneficial to the overall cooling of the armature.
[0022] The inner wall of the reinforcing ring 40 has a circumference with an avoidance groove 41 that passes through the front and rear ends of the reinforcing ring 40, and the avoidance groove 41 matches and corresponds to the heat dissipation groove 11a. By setting the avoidance groove 41 on the inner diameter of the reinforcing ring 40, the heat at one end of the heat dissipation groove 11a can be conveniently discharged smoothly, playing a role of auxiliary matching. In this embodiment, since the heat core area of the armature is located at the commutator 30 when it is in operation, a plurality of heat dissipation through holes 31 that pass through the front and rear ends are set in a circumferential circle inside the commutator 30, which can not only dissipate the heat of the commutator 30 itself, but also naturally dissipate the heat inside the armature, and effectively improve the heat dissipation effect of the armature structure under the interference fit of the heat dissipation groove 11a, the avoidance groove 41 and the shaft body.
[0023] In summary, in the armature of the automobile starter of the present embodiment, during the use of the starter, a heat dissipation groove 11a that runs through the inner diameter surface of the positioning ring 11 is provided in a circle, so that the inner wall of the ring body has a plurality of non-contact surfaces, and the heat inside the armature and the coil can be dissipated from both ends of the armature through the heat dissipation groove 11a of the non-contact surface. At the same time, a plurality of heat dissipation through holes 31 that run through the inner circumference of the commutator 30 are provided, which can not only dissipate the heat of the commutator 30 itself to the outside, but also naturally dissipate the heat inside the armature to the outside, and the heat dissipation effect of the armature structure can be effectively improved under the action of the heat dissipation groove 11a, the avoidance groove 41 and the interference fit of the shaft.
[0024] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. An armature for an automobile starter, comprising an iron core (10), a shaft (20), a commutator (30) and a reinforcement ring (40), characterized in that: The core (10) has a positioning ring (11) at its center for sleeve-setting the positioning shaft (20) and the commutator (30); the reinforcing ring (40) is sleeved on the outside of the commutator (30) and fixed to the end of the core (10); the front end of the shaft (20) is sleeved in the inner ring hole of the commutator (30); the shaft (20) is respectively fitted with the positioning ring (11) and the commutator (30) in an interference fit; the positioning ring (11) has a heat dissipation groove (11a) extending through the front and rear ends of the positioning ring (11) on its inner circumference; and the commutator (30) has a heat dissipation through hole (31) extending through the front and rear ends of the commutator (30) on its inner circumference.
2. The armature for an automobile starter according to claim 1, characterized in that: The iron core (10) is axially rotated and is located outside the positioning ring (11) and also has a coil winding position (12) for winding a coil.
3. The armature for an automobile starter according to claim 1, characterized in that: A knurled surface (21) is provided on the outer side of the middle section of the shaft rod (20) and forms an interference fit with the positioning ring (11) and the commutator (30) respectively.
4. The armature for an automobile starter according to claim 1, characterized in that: The inner wall of the reinforcement ring (40) has an avoidance groove (41) penetrating the front and rear ends of the reinforcement ring (40), and the avoidance groove (41) matches and corresponds to the heat dissipation groove (11a).