Armature assembly and starter

Abstract

The application provides an armature assembly and a starter, and relates to the technical field of overload protection of the starter, which optimizes the structure of the armature assembly to a certain extent and guarantees the consistency of the overload failure mode of the starter. The armature assembly comprises a core, an armature winding and an abutting piece. The armature winding is wound on the core, and first and second accommodating spaces are arranged at both ends of the core. The abutting piece is arranged in the first and / or second accommodating space and abuts against the armature winding.

Description

Technical Field

[0001] This invention relates to the field of starter overload protection technology, and in particular to an armature assembly and a starter. Background Technology

[0002] Starter overload protection disconnects the starter circuit, mainly by blowing the brush holder fuse. However, blowing the fuse requires a large current, which is caused by a short circuit in the starter's internal circuitry.

[0003] However, due to the inconsistent failure modes of existing starters under overload, the failure point cannot be determined by human intervention, resulting in a high product risk. When the starter overload current is low, the rate at which the armature generates heat is lower than the rate at which it dissipates heat, making it difficult to short-circuit. There is a risk of burnout when the starter operates for a long time. Furthermore, since the existing armature windings are protected by insulating varnish, it is difficult for them to achieve a short circuit on their own.

[0004] Therefore, there is an urgent need to provide an armature assembly and starter motor to solve the problems existing in the prior art to a certain extent. Summary of the Invention

[0005] The purpose of this invention is to provide an armature assembly and a starter motor, so as to optimize the armature assembly structure to a certain extent and ensure the consistency of the starter motor overload failure mode.

[0006] The present invention provides an armature assembly comprising an iron core, an armature winding, and an abutment member; the armature winding is wound around the iron core and forms a first accommodating space and a second accommodating space at both ends of the iron core, and the abutment member is disposed in the first accommodating space and / or the second accommodating space and abuts against the armature winding.

[0007] The armature assembly provided by the present invention further includes a commutator and a retaining ring. The retaining ring is tied to the outside of the armature winding, and the commutator is connected to the armature winding through the retaining ring. The commutator is located on the side forming the first accommodating space.

[0008] Specifically, the armature assembly provided by the present invention further includes an armature shaft, wherein the armature shaft, the commutator and the iron core are all connected to 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.

[0009] Furthermore, the abutment has a closed ring structure, and the abutment with the closed ring structure is placed in the first receiving space and / or the second receiving space before the armature winding is twisted.

[0010] The abutment has a non-closed ring structure, and the abutment with the non-closed ring structure is placed in the first accommodating space and / or the second accommodating space after the armature winding is twisted.

[0011] Specifically, the first accommodating space has a frustum-shaped structure, and the outer diameter of the abutting member is the same as the maximum diameter of the first accommodating space; the second accommodating space has a cylindrical groove-shaped structure, and the outer diameter of the abutting member is the same as the diameter of the second accommodating space.

[0012] Furthermore, the abutment is made of a conductive metallic material.

[0013] Furthermore, the core comprises a plurality of core laminations stacked sequentially, each of the core laminations comprising a plurality of open receiving slots opened along the circumference of the core lamination, and the armature winding is disposed within the receiving slots.

[0014] Compared with the prior art, the armature assembly provided by the present invention has the following advantages:

[0015] The armature assembly provided by the present invention includes an iron core, an armature winding, and an abutment member; the armature winding is wound on the iron core, and a first receiving space and a second receiving space are respectively formed at both ends of the iron core; the abutment member is disposed in the first receiving space and / or the second receiving space and abuts against the armature winding.

[0016] This analysis shows that, because the iron core rotates during motor operation, the armature winding wound on the iron core rotates along with the iron core. A first and a second receiving space are formed at both ends of the iron core by the armature winding, and abutment members are provided within the first and / or second receiving spaces. When the iron core drives the armature winding to rotate, it can cause the abutment members to rotate as well.

[0017] Since the abutment in this application abuts against the armature winding in both the first and second receiving spaces, and the rotation of the abutment generates centrifugal force, the centrifugal force will increase the pressure of the abutment on the armature winding.

[0018] When operating under overload for an extended period, the temperature of the iron core gradually increases. As the armature winding, which is subjected to pressure from the contact element, becomes more tightly connected to the iron core, it is more likely to melt. This ensures that the melting point of the armature assembly is located at the position where the contact element is located, thereby ensuring the consistency of the starter overload failure mode to a certain extent.

[0019] Furthermore, the present invention also provides a starter motor, including a motor that utilizes the armature assembly described above, and further including a battery, a switch, a coil assembly, a pull-in assembly, a first contact end, a second contact end, and a fuse rod; the positive terminal of the battery is in contact with one end of the switch and the first contact end, respectively, and the other end of the switch is connected to the coil assembly; the pull-in assembly includes a pull-in member and a mating member, the coil assembly is wound around the mating member, and the mating member is movable relative to the coil assembly to move the pull-in member toward the first contact end and the second contact end; the second contact end is connected to the second contact end and one end of the fuse rod, respectively, and the other end of the fuse rod is connected to the motor.

[0020] The coil assembly includes a holding coil and a pull coil. The end of the switch away from the battery is connected to one end of the holding coil and one end of the pull coil, respectively. The other end of the holding coil is grounded, and the other end of the pull coil is connected to the second contact end.

[0021] When the starter provided by the present invention is used, the switch is closed, and the current from the battery enters the coil assembly through the switch. Since the engaging member does not make contact with the first contact end and the second contact end at this stage, the current flows through the coil assembly from the second contact end to the fuse rod, and then through the fuse rod to power the motor.

[0022] As the power is continuously supplied, the coil assembly wound on the mating part can drive the mating part to move, thereby enabling the attracting part to move towards the first contact end and the second contact end, and finally make the two ends of the attracting part contact the first contact end and the second contact end respectively. At this time, since the distance between the first contact end and the second contact end is the shortest, the current flowing from the battery passes through the first contact end, the attracting part, and the second contact end into the fuse rod and supplies power to the motor.

[0023] When the starter motor is continuously overloaded, the armature winding will short-circuit, causing the motor to fail. The current passing through the fuse will no longer pass through the motor, resulting in extremely low resistance in the overall circuit and an increase in current. This causes the fuse to receive a large current and melt, thus protecting the starter motor. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1This is a first-view structural schematic diagram of the armature assembly provided in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the core lamination in the armature assembly provided in an embodiment of the present invention;

[0027] Figure 3 An electrical schematic diagram of a starter provided for an embodiment of the present invention.

[0028] In the diagram: 1-Core; 101-Core lamination; 1011-Receiving slot; 2-Armature winding; 201-First receiving space; 202-Second receiving space; 3-Abutting part; 4-Commutator; 5-Armature shaft; 6-Fixing ring; 7-Motor; 8-Battery; 9-Switch; 10-First contact end; 11-Second contact end; 12-Attracting part; 13-Matching part; 14-Holding coil; 15-Pull coil; 16-Fuse rod. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0034] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” may be used herein to describe the relationship between one element and another as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also the different orientations of the device during use or operation.

[0035] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0036] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0037] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have various constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis that they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0038] like Figure 1As shown, the present invention provides an armature assembly, including an iron core 1, an armature winding 2, and an abutment member 3; the armature winding 2 is wound on the iron core 1, and a first receiving space 201 and a second receiving space 202 are respectively formed at both ends of the iron core 1; the abutment member 3 is disposed in the first receiving space 201 and / or the second receiving space 202, and abuts against the armature winding 2.

[0039] Compared with the prior art, the armature assembly provided by the present invention has the following advantages:

[0040] When the motor 7 is operating, the iron core 1 rotates, and the armature winding 2 wound on the iron core 1 rotates along with the iron core 1. A first receiving space 201 and a second receiving space 202 are formed at both ends of the iron core 1 by the armature winding 2, and an abutment 3 is provided in the first receiving space 201 and / or the second receiving space 202. When the iron core 1 drives the armature winding 2 to rotate, it can drive the abutment 3 to rotate.

[0041] Since the abutment 3 in this application abuts against the armature winding 2 in both the first receiving space 201 and the second receiving space 202, and the rotation of the abutment 3 will generate centrifugal force, the centrifugal force will increase the pressure of the abutment 3 on the armature winding 2.

[0042] When operating under overload for a long time, the temperature of the core 1 will gradually rise. Since the armature winding 2, which is subjected to pressure from the abutment 3, has a tighter contact with the core 1, it is more likely to be melted. This ensures that the melting point of the armature assembly is located at the position where the abutment 3 is provided, thereby ensuring the consistency of the starter overload failure mode to a certain extent.

[0043] It should be further noted that the abutment 3 in this application can be disposed within the first receiving space 201, or within the second receiving space 202, or two abutment 3 can be disposed, respectively located within the first receiving space 201 and the second receiving space 202. Furthermore, to ensure that the abutment 3 can smoothly short-circuit the armature winding 2 at the corresponding position, it is preferably made of a conductive metal material and has a certain degree of elasticity. This allows the abutment 3 to better apply pressure to the armature winding 2 when it rotates with the core 1, thereby ensuring the stable melting of the armature winding 2 under prolonged overload.

[0044] It is understandable that the melting of the armature winding 2 mentioned above is actually the melting of the insulating outer sheath that wraps around the armature winding 2. Since the melting of the insulating outer sheath will expose the internal copper wire and make contact with the iron core 1 or the abutment ring, a short circuit can be generated at the corresponding position.

[0045] Among them, such as Figure 1As shown, the armature assembly provided by the present invention further includes a commutator 4 and a retaining ring 6. The retaining ring 6 is tied to the outside of the armature winding 2. The commutator 4 is connected to the armature winding 2 through the retaining ring 6, and the commutator 4 is located on the side forming the first accommodating space 201.

[0046] The fixing ring 6 allows the armature winding 2 to be more compact and regular, resulting in a more stable connection with the commutator 4. Since the commutator 4 is located on one side of the core 1, therefore, as... Figure 1 As shown, the first accommodating space 201 in this application has a frustum-shaped structure, and the outer diameter of the abutting member 3 is the same as the maximum diameter of the first accommodating space 201; the second accommodating space 202 has a cylindrical groove-shaped structure, and the outer diameter of the abutting member 3 is the same as the diameter of the second accommodating space 202.

[0047] By making the outer diameter of the abutment 3 the same as the maximum diameter of the first accommodating space 201, and preferably, the first accommodating space 201 in this application has a frustum-shaped structure, the abutment 3 can be limited so that the abutment 3 can only rotate with the iron core 1 within the first accommodating space 201, thereby avoiding the problem of the abutment 3 moving along the axial direction to a certain extent, thus ensuring the stability of the rotation of the entire armature assembly and avoiding vibration.

[0048] like Figure 1 As shown, the second accommodating space 202 in this application has a cylindrical slot structure, that is, the side of the second accommodating space 202 away from the iron core 1 is an open side. The abutting member 3 is set in the second accommodating space 202 and can also abut against the armature winding 2, and increase the pressure on the armature winding 2 when rotating, thereby realizing the short circuit of the armature winding 2 under long-term overload.

[0049] Since the armature winding 2 needs to be twisted after being wound and connected with the core 1, when the abutment 3 in this application has a closed ring structure, the deformation of the abutment 3 is small. Therefore, the abutment 3 needs to be placed in the first receiving space 201 or the second space before the twisting process is carried out.

[0050] When the abutment 3 provided in this application adopts a non-closed ring structure, since the abutment 3 has an open part, the deformation of the abutment 3 is relatively large. Therefore, it can be placed in the first receiving space 201 or the second receiving space 202 before the twisting process, or it can be placed in the first receiving space 201 or the second receiving space 202 after the twisting process.

[0051] like Figure 1 As shown, it can be understood that the armature assembly provided by the present invention also includes an armature shaft 5, the armature shaft 5, the commutator 4 and the iron core 1 are all connected to the armature shaft 5, and the axis of the armature shaft 5 is collinear with the axis of the commutator 4 and the axis of the iron core 1.

[0052] In this application, one end of the armature shaft 5 is located inside the commutator 4, and the other end passes through the iron core 1 and protrudes from the iron core 1. The rotation of the armature shaft 5 can drive the iron core 1 to rotate, thereby driving the abutment 3 to rotate.

[0053] Preferably, such as Figure 1 Combination Figure 2 As shown, the core 1 in this application includes a plurality of core laminations 101 stacked sequentially. Each core lamination 101 includes a plurality of open receiving slots 1011 opened along the circumference of the core lamination 101, and the armature winding 2 is disposed in the receiving slots 1011.

[0054] like Figure 2 As shown, the core lamination 101 provided in this application also has a central hole. Multiple core laminations 101 stacked together can form a central through hole, allowing the armature shaft 5 to pass through and connect to the core 1. The formed receiving groove 1011 enables the armature winding 2 to be stably connected to the core 1 and ensures a certain gap between the core lamination 101 and the armature winding 2, thereby ensuring stable operation under normal conditions. When subjected to prolonged overload, the gap between the armature winding 2 and the core 1 can be quickly reduced by the abutment member 3, causing the armature winding 2 to come into contact with the core 1, thus achieving a short circuit.

[0055] In addition, such as Figure 3 As shown, the present invention also provides a starter motor, including a motor 7, which uses the armature assembly described above, and further includes a battery 8, a switch 9, a coil assembly, a pull-in assembly, a first contact end 10, a second contact end 11, and a fuse rod 16; the positive terminal of the battery 8 is in contact with one end of the switch 9 and the first contact end 10, respectively, and the other end of the switch 9 is connected to the coil assembly; the pull-in assembly includes a pull-in member 12 and a mating member 13, the coil assembly is wound around the mating member 13, and the mating member 13 is movable relative to the coil assembly, so that the pull-in member 12 moves toward the first contact end 10 and the second contact end 11; the second contact end 11 is connected to one end of the second contact end 11 and the fuse rod 16, respectively, and the other end of the fuse rod 16 is connected to the motor 7.

[0056] When the starter provided by the present invention is used, the switch 9 is closed, and the current of the battery 8 enters the coil assembly through the switch 9. Since the engaging member 12 does not make contact with the first contact end 10 and the second contact end 11 at this stage, the current flows through the coil assembly from the second contact end 11 to the fuse rod 16, and then through the fuse rod 16 to power the motor 7.

[0057] As the power is continuously supplied, the coil assembly wound on the mating part 13 can drive the mating part 13 to move, thereby enabling the attracting part 12 to move towards the first contact end 10 and the second contact end 11, and finally make the two ends of the attracting part 12 contact the first contact end 10 and the second contact end 11 respectively. At this time, since the distance between the first contact end 10 and the second contact end 11 is the shortest, the current flowing from the battery 8 passes through the first contact end 10, the attracting part 12, and the second contact end 11 into the fuse rod 16 and supplies power to the motor 7.

[0058] When the starter motor is continuously overloaded, the armature winding 2 is short-circuited, causing the motor 7 to fail. The current passing through the fuse rod 16 no longer passes through the motor 7, resulting in extremely low resistance in the overall circuit and an increase in current. This causes the fuse rod 16 to receive a large current and melt, thus protecting the starter motor.

[0059] Optionally, such as Figure 3 As shown, the coil assembly includes a holding coil 14 and a pull coil 15. The end of the switch 9 away from the battery 8 is connected to one end of the holding coil 14 and one end of the pull coil 15, respectively. The other end of the holding coil 14 is grounded, and the other end of the pull coil 15 is connected to the second contact terminal 11.

[0060] like Figure 3 As shown, this application provides a pull coil 15. When both the pull coil 15 and the holding coil 14 are energized, the mating part 13 can be driven to move towards the first contact end 10 and the second contact end 11, thereby achieving contact between the suction part 12 and the first contact end 10 and the second contact end 11. Furthermore, the holding coil 14 ensures that the suction part 12 is always in a state of being attracted to the first contact end 10 and the second contact end 11, thus ensuring the continuity of the overall starter circuit.

[0061] When switch 9 is turned off, coil 14 is no longer energized, causing the engaging part 12 and mating part 13 to gradually move away from the first contact end 10 and the second contact end 11, separating from the first contact end 10 and the second contact end 11, thereby de-energizing motor 7 and stopping operation.

[0062] It should be noted that starter motors are typically used in car starting. Since the starter motor stops operating after the vehicle starts, switch 9 is disconnected after the vehicle starts, keeping coil 14 de-energized, causing the engaging member 12 to separate from the first contact end 10 and the second contact end 11, thereby stopping the starter motor from operating.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An armature assembly, characterized in that, Includes the iron core, armature winding, and abutment components; The armature winding is wound around the iron core, and a first receiving space and a second receiving space are respectively formed at both ends of the iron core. The abutment is disposed in the first receiving space and / or the second receiving space and abuts against the armature winding. The rotation of the abutment generates centrifugal force, which increases the pressure of the abutment on the armature winding. When the iron core is overloaded for a long time, the temperature will gradually rise. Under the pressure of the abutment, the armature winding will come into close contact with the iron core, making the armature winding easier to melt and so that the melting point of the armature assembly is located at the position where the abutment is located. The armature winding is fused when the insulating outer sheath of the armature winding melts, exposing the internal copper wires and bringing them into contact with the iron core or the abutment, thereby creating a short circuit at the corresponding location.

2. The armature assembly according to claim 1, characterized in that, It also includes a commutator and a retaining ring, the retaining ring being tied to the outside of the armature winding, the commutator being connected to the armature winding through the retaining ring, and the commutator being located on one side forming the first accommodating space.

3. The armature assembly according to claim 2, characterized in that, It also includes an armature shaft, to which the armature shaft, the commutator, and the iron core are all connected, and the axis of the armature shaft is collinear with the axis of the commutator and the axis of the iron core.

4. The armature assembly according to claim 1, characterized in that, The abutment has a closed ring structure, and the abutment with the closed ring structure is placed in the first receiving space and / or the second receiving space before the armature winding is twisted.

5. The armature assembly according to claim 1, characterized in that, The abutment has a non-closed ring structure, and the abutment with the non-closed ring structure is placed in the first receiving space and / or the second receiving space after the armature winding is twisted.

6. The armature assembly according to claim 1, characterized in that, The first accommodating space has a frustum-shaped structure, and the outer diameter of the abutting member is the same as the maximum diameter of the first accommodating space. The second receiving space has a cylindrical groove structure, and the outer diameter of the abutment is the same as the diameter of the second receiving space.

7. The armature assembly according to claim 1, characterized in that, The abutment is made of a conductive metallic material.

8. The armature assembly according to claim 1, characterized in that, The core comprises a plurality of core laminations stacked sequentially, each of the core laminations comprising a plurality of open receiving slots opened along the circumference of the core lamination, and the armature winding is disposed within the receiving slots.

9. A starter motor, characterized in that, The motor includes an armature assembly according to any one of claims 1-8, and further includes a battery, a switch, a coil assembly, a pull-in assembly, a first contact terminal, a second contact terminal, and a fuse rod. The positive terminal of the battery is in contact with one end of the switch and the first contact end, respectively, and the other end of the switch is connected to the coil assembly; The suction assembly includes a suction member and a mating member. The coil assembly is wound around the mating member, and the mating member is movable relative to the coil assembly so that the suction member moves toward the first contact end and the second contact end. The second contact end is connected to both the second contact end and one end of the fuse rod, and the other end of the fuse rod is connected to the motor.

10. The starter motor according to claim 9, characterized in that, The coil assembly includes a holding coil and a pull coil. The end of the switch away from the battery is connected to one end of the holding coil and one end of the pull coil, respectively. The other end of the holding coil is grounded, and the other end of the pull coil is connected to the second contact end.

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