Starter rotor positioning structure

Abstract

The utility model discloses a starter rotor positioning structure, which relates to the technical field of starters and comprises a shell mechanism, a built-in rotating mechanism is rotatably sleeved in the shell mechanism, an electric drive shaft is fixedly arranged in the center of the built-in rotating mechanism, and a switch mechanism is movably sleeved on the electric drive shaft. According to the utility model, the problems that the rotor sleeve connection is realized only through a rotating shaft, the central positioning of the rotor is difficult to realize, the air gap between the rotor and the stator is difficult to keep uniform, and tooth breaking occurs in the existing starter are solved; the cylindrical rollers are arranged in a circular array, transverse and longitudinal pressure is increased for the rotor winding due to the conical arrangement, friction force during rotation is reduced due to the arrangement of the cylindrical rollers, rotation centering positioning is achieved, and the uniformity of an air gap between the rotor and the stator is kept; and center positioning of the rotor winding is realized.

Description

Technical Field

[0001] This utility model relates to the field of starter technology, specifically to a starter rotor positioning structure. Background Technology

[0002] The design of the rotor core positioning mechanism of an automobile starter is based on the working principle of the motor rotor. The main function of the motor rotor is to output torque. Through interaction with the stator of the motor, it realizes the conversion of electromagnetic energy into mechanical energy. In an automobile starter, the rotor core needs to be precisely positioned to ensure that it can rotate stably and efficiently under the action of the electromagnetic field, thereby driving the engine to start.

[0003] A rotor structure for an automotive starter motor, authorized by announcement number CN220254228U, includes an iron core, a rotating shaft, end rings, fasteners, positioning posts, and a fan. The iron core has several first heat dissipation holes. The rotating shaft is mounted on the iron core, and two end rings are inserted into the rotating shaft. Each of the two end rings has several second heat dissipation holes and several fan blades. The fasteners and positioning posts are mounted on the iron core, and the fan is inserted into the rotating shaft. The first heat dissipation holes allow ventilation to the iron core, while the second heat dissipation holes allow ventilation to the end rings. Since the first and second heat dissipation holes are connected, heat dissipation efficiency is improved. Simultaneously, the fan blades and the fan themselves accelerate airflow during rotation, further enhancing heat dissipation efficiency. This starter motor, however, relies solely on the rotating shaft for rotor connection, making it difficult to center the rotor. This results in an uneven air gap between the rotor and stator, leading to tooth breakage.

[0004] To address the aforementioned issues, a starter rotor positioning structure is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a starter rotor positioning structure, which solves the problem in the prior art where the existing starter simply uses a shaft to achieve rotor sleeve connection, making it difficult to center the rotor, resulting in the air gap between the rotor and stator being difficult to maintain uniformly and causing tooth breakage.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a starter rotor positioning structure, including a housing mechanism, an internal rotating mechanism rotatably sleeved inside the housing mechanism, an electric drive shaft fixedly disposed at the center of the internal rotating mechanism, a switching mechanism movably sleeved on the electric drive shaft, the housing mechanism including a stator fixed housing, a middle partition and a front end cover respectively screwed to both sides of the stator fixed housing, the electric drive shaft inserted into the center of the middle partition and the front end cover, the internal rotating mechanism fixedly disposed on the electric drive shaft, the internal rotating mechanism including a rotatable rotor winding, a tapered groove opened on one side of the rotor winding, a tapered insert block corresponding to the tapered groove at one end of the middle partition, a cylindrical roller rotatably disposed on one side of the tapered insert block, and a side pressure roller bearing fitted to the rotor winding in the front end cover.

[0007] Preferably, the stator fixing shell has four sets of stator magnetic poles connected internally by threads, and the four sets of stator magnetic poles are arranged in a circular array with the stator fixing shell as the same center.

[0008] Preferably, an electric brush is fixedly installed inside the front end cover, and a central locking block is provided at the center of the electric brush, with the side pressure roller bearing embedded in the central locking block.

[0009] Preferably, the switching mechanism includes a one-way clutch sleeved on the electric drive shaft, wherein the one-way clutch and the electric drive shaft are engaged in an arc.

[0010] Preferably, the switching mechanism further includes a shift fork that is movably engaged with one side of the one-way clutch, and a pinion is fixedly provided on one side of the one-way clutch.

[0011] Preferably, the switching mechanism further includes a buffer spring fixedly disposed between the one-way clutch and the middle partition.

[0012] Preferably, the rotor winding is fitted with a side-pressure roller bearing and a cylindrical roller on both sides.

[0013] Preferably, the radius of the central opening of the front cover and the middle partition is greater than the radius of the electric drive shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The present invention provides a starter rotor positioning structure, which uses a partition plate to press the rotor winding, a tapered insert block and a tapered corresponding rotor winding, and cylindrical rollers arranged in a circular array. The tapered arrangement increases the lateral and longitudinal pressure on the rotor winding, while the cylindrical roller arrangement reduces the friction during rotation, thereby achieving centered positioning and maintaining the uniformity of the air gap between the rotor and stator. This invention initially solves the problem that existing starters simply use a shaft to achieve rotor sleeve connection, which makes it difficult to center the rotor, resulting in difficulty in maintaining a uniform air gap between the rotor and stator and causing tooth breakage.

[0016] 2. The starter rotor positioning structure provided by this utility model uses a front cover to fit the rotor winding. The middle partitions on both sides of the stator fixing housing and the front cover lock the rotor winding rotation. The electric drive shaft and the rotor winding rotate synchronously after starting. The side pressure roller bearing engages in the center of the front cover, realizing the center positioning of the rotor winding. This solves the problem that the existing starter simply uses a rotating shaft to achieve rotor sleeve, which makes it difficult to achieve center positioning of the rotor, resulting in the air gap between the rotor and stator being difficult to maintain uniformly and causing tooth breakage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall side view structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the outer shell mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the overall internal structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the overall disassembled structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the electric drive shaft and the built-in rotating mechanism of this utility model;

[0022] Figure 6 This is a schematic diagram of the outer shell mechanism and the switching mechanism of this utility model.

[0023] In the diagram: 1. Outer shell mechanism; 11. Stator fixed outer shell; 111. Stator magnetic pole; 12. Middle partition plate; 121. Conical insert; 122. Cylindrical roller; 13. Front end cover; 131. Brush; 1311. Centering block; 132. Side pressure roller bearing; 2. Electric drive shaft; 3. Switching mechanism; 31. Shift fork; 32. One-way clutch; 33. Buffer spring; 34. Pinion; 4. Internal rotating mechanism; 41. Rotor winding; 42. Conical slot. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0026] Combination Figure 1 This utility model discloses a starter rotor positioning structure, including a housing mechanism 1. An internal rotating mechanism 4 is rotatably fitted inside the housing mechanism 1. An electric drive shaft 2 is fixedly mounted at the center of the internal rotating mechanism 4. A switching mechanism 3 is movably fitted onto the electric drive shaft 2. The housing mechanism 1 includes a stator fixing housing 11. A middle partition 12 and a front end cover 13 are screwed to both sides of the stator fixing housing 11, respectively. The electric drive shaft 2 is inserted into the center of the middle partition 12 and the front end cover 13. The internal rotating mechanism 4 is fixedly mounted on the electric drive shaft 2. The internal rotating mechanism 4 includes a rotatable rotor winding 41. A tapered groove 42 is provided on one side of the rotor winding 41. A tapered insert 121 is provided at one end of the middle partition 12 corresponding to the tapered groove 42. A cylindrical roller 122 is rotatably mounted on one side of the tapered insert 121. The front end cover 13 includes a side-pressure roller bearing 132 that fits against the rotor winding 41.

[0027] Specifically, the partition plates 12 on both sides of the stator fixed housing 11 and the front cover 13 lock the rotor winding 41 in rotation. The electric drive shaft 2 rotates synchronously with the rotor winding 41 after startup. The side pressure roller bearing 132 engages in the center of the front cover 13 to achieve the center positioning of the rotor winding 41. The tapered insert 121 is set in a tapered correspondence with the rotor winding 41. The cylindrical rollers 122 are arranged in a circular array. The tapered arrangement increases the lateral and longitudinal pressure on the rotor winding 41. The cylindrical rollers 122 reduce the friction during rotation, achieve center positioning during rotation, and maintain the uniformity of the air gap between the rotor and stator.

[0028] The present invention will be further described below with reference to the embodiments.

[0029] Example 1:

[0030] Combination Figures 2-6 The stator housing 11 has four sets of stator magnetic poles 111 connected internally by threads. The four sets of stator magnetic poles 111 are arranged in a circular array with the stator housing 11 as the center. When the ignition switch is closed, the current passes through the starter's electromagnetic switch and enters the stator magnetic poles 111. The stator magnetic poles 111 generate a magnetic field and become an electromagnet.

[0031] A brush 131 is fixedly installed inside the front cover 13. A centering block 1311 is set in the center of the brush 131. The side pressure roller bearing 132 is embedded in the centering block 1311. The brush 131 introduces the current of the power supply into the rotor winding 41. The centering engagement of the centering block 1311 realizes the centering and fixing of the commutator at one end of the rotor winding 41, ensuring the stability of current transmission.

[0032] The switching mechanism 3 includes a one-way clutch 32 sleeved on the electric drive shaft 2. The one-way clutch 32 and the electric drive shaft 2 are engaged in an arc. The one-way clutch 32 moves along the electric drive shaft 2, which can drive the electric drive shaft 2 to rotate to one side. This is the existing structure. The one-way clutch 32 can effectively transmit the torque of the starter to the electric drive shaft 2. After the engine starts, it can automatically cut off the power transmission from the engine to the starter, preventing the starter from being dragged by the engine to rotate at high speed. The one-way clutch 32 has built-in rollers to realize the function of transmitting torque in one direction.

[0033] Example 2:

[0034] Combination Figures 4-6 The switching mechanism 3 also includes a shift fork 31 that is movably engaged with one side of the one-way clutch 32. A pinion 34 is fixedly provided on one side of the one-way clutch 32. When the starter motor is working, the shift fork 31 pushes the one-way clutch 32 and the pinion 34 to move axially, so that they can smoothly engage with the engine flywheel ring gear. After the engine starts, the pinion 34 can be separated from the flywheel ring gear.

[0035] The switching mechanism 3 also includes a buffer spring 33 fixedly disposed between the one-way clutch 32 and the middle partition 12. The buffer spring 33 realizes the movement reset and buffering of the one-way clutch 32.

[0036] Side-pressure roller bearings 132 and cylindrical rollers 122 are respectively attached to both sides of the rotor winding 41. The side-pressure roller bearings 132 and cylindrical rollers 122 on both sides of the rotor winding 41 reduce the rotational friction of the rotor winding 41 and maintain the stable rotation of the rotor winding 41.

[0037] The central opening radius of the front cover 13 and the middle partition 12 is larger than the radius of the electric drive shaft 2. This design is intended to reduce contact friction during rotation.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A starter rotor positioning structure comprising a housing mechanism (1), characterized by: The inner rotating sleeve of the shell mechanism (1) is sleeved with an inner rotating mechanism (4), the center of the inner rotating mechanism (4) is fixedly provided with an electric drive shaft (2), and the electric drive shaft (2) is movably sleeved with a switch mechanism (3). The shell mechanism (1) comprises a stator fixed shell (11), the two sides of the stator fixed shell (11) are respectively screw-connected with a middle partition plate (12) and a front end cover (13), the electric drive shaft (2) is inserted into the center of the middle partition plate (12) and the front end cover (13), the inner rotating mechanism (4) is fixedly arranged on the electric drive shaft (2), the inner rotating mechanism (4) comprises a rotatable rotor winding (41), one side of the rotor winding (41) is provided with a tapered groove (42), one end of the middle partition plate (12) is provided with a tapered plug (121) corresponding to the tapered groove (42), one side of the tapered plug (121) is rotatably provided with a cylindrical roller (122), and the front end cover (13) comprises a side pressure roller bearing (132) arranged in close contact with the rotor winding (41).

2. A starter rotor positioning structure according to claim 1, characterized by: The inner rotating sleeve of the shell mechanism (1) is sleeved with an inner rotating mechanism (4), the center of the inner rotating mechanism (4) is fixedly provided with an electric drive shaft (2), and the electric drive shaft (2) is movably sleeved with a switch mechanism (3).

3. A starter rotor positioning structure according to claim 1, characterized by: The inner rotating sleeve of the shell mechanism (1) is sleeved with an inner rotating mechanism (4), the center of the inner rotating mechanism (4) is fixedly provided with an electric drive shaft (2), and the electric drive shaft (2) is movably sleeved with a switch mechanism (3).

4. A starter rotor positioning structure according to claim 1, characterized by: The inner rotating sleeve of the shell mechanism (1) is sleeved with an inner rotating mechanism (4), the center of the inner rotating mechanism (4) is fixedly provided with an electric drive shaft (2), and the electric drive shaft (2) is movably sleeved with a switch mechanism (3).

5. A starter rotor positioning structure according to claim 4, characterized by: The inner rotating sleeve of the shell mechanism (1) is sleeved with an inner rotating mechanism (4), the center of the inner rotating mechanism (4) is fixedly provided with an electric drive shaft (2), and the electric drive shaft (2) is movably sleeved with a switch mechanism (3).

6. A starter rotor positioning structure according to claim 4, characterized by: The inner rotating sleeve of the shell mechanism (1) is sleeved with an inner rotating mechanism (4), the center of the inner rotating mechanism (4) is fixedly provided with an electric drive shaft (2), and the electric drive shaft (2) is movably sleeved with a switch mechanism (3).

7. A starter rotor positioning structure as in claim 1 wherein: The inner rotating sleeve of the shell mechanism (1) is sleeved with an inner rotating mechanism (4), the center of the inner rotating mechanism (4) is fixedly provided with an electric drive shaft (2), and the electric drive shaft (2) is movably sleeved with a switch mechanism (3).

8. A starter rotor positioning structure according to claim 1, characterized by: The inner rotating sleeve of the shell mechanism (1) is sleeved with an inner rotating mechanism (4), the center of the inner rotating mechanism (4) is fixedly provided with an electric drive shaft (2), and the electric drive shaft (2) is movably sleeved with a switch mechanism (3). The inner rotating sleeve of the shell mechanism (1) is sleeved with an inner rotating mechanism (4), the center of the inner rotating sleeve of the shell mechanism (1) is fixedly provided with an electric drive shaft (2), and the electric drive shaft (2) is movably sleeved with a switch mechanism (3).

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