CN216672781U

CN216672781U - Starter

Info

Publication number: CN216672781U
Application number: CN202123092209.XU
Authority: CN
Inventors: 孙跃奎; 陈孙艺
Original assignee: Fujian Yida Edrive Co ltd
Current assignee: Fujian Yida Edrive Co ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-06-03
Anticipated expiration: 2031-12-10

Abstract

The utility model provides a starter, which comprises a shell and an electromagnetic switch fixedly connected to the shell, the shell is internally provided with a motor, the electromagnetic switch comprises a control circuit board, a relay electrically connected with the control circuit board, a main wiring seat and a switch shell which are fixedly connected with each other, the first electromagnetic coil and the second electromagnetic coil are separated by a partition plate, two movable iron cores are respectively arranged to be matched with the two electromagnetic coils in a one-to-one manner, the first electromagnetic coil is used as a slow meshing coil to provide pre-rotation current for a starter, the second electromagnetic coil is used as an attraction coil of a movable contact and a fixed contact, the two groups of electromagnetic coils are relatively independent, the number of turns of the coils can be different, the design can be flexibly carried out, the current of the electromagnetic coil used for attracting the moving contact and the static contact of the switch can be reduced, the heating value is reduced, the risk of burning the switch is reduced, and the service life of the starter is relatively long.

Description

Starter

Technical Field

The utility model relates to a drive device, in particular to a starter.

Background

The starter is also called as a motor and is mainly used for converting electric energy of a storage battery into mechanical energy and driving an engine flywheel to rotate so as to realize the starting of the engine. The existing starters on the market basically adopt a shifting fork to push a rotating shaft to realize meshing with an engine flywheel, the action of the shifting fork and the action of a starter contact switch are realized by depending on the same electromagnetic assembly, a magnetic field generated by the electromagnetic assembly is relatively strong, the heating value is large, the shifting fork pulling force is large, the shifting force of a pinion on the rotating shaft is large, the meshing impact with an engine flywheel gear ring is large, the flywheel gear ring and the pinion are easy to damage, and the service life of the starter is influenced.

Chinese utility model patent publication No. CN212155026U discloses a no shift fork starter, it utilizes two electromagnetic assemblies to drive pivot action and starter contact switch action respectively, can reduce pinion pull-out power to a certain extent, however, because it needs to rely on the solenoid of the electromagnetic assembly that drives the pivot action to realize the slow rotation of motor before full power rotates, required current is relatively great, the magnetic field of production is also relatively strong, other metal parts (especially output shaft) on the starter are equally easily magnetized and adsorb iron fillings, influence its life.

In view of this, the applicant has conducted intensive research on the structure of the starter, and has made this way.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a starter with relatively long service life.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a starter comprises a shell and an electromagnetic switch fixedly connected to the shell, wherein a motor is arranged in the shell, the electromagnetic switch comprises a control circuit board, a relay electrically connected with the control circuit board, a main wiring seat and a switch shell fixedly connected with each other, a fixed contact is arranged on the main wiring seat, a first electromagnetic coil, a partition plate and a second electromagnetic coil which are sequentially arranged along the axis direction of the switch shell are arranged in the switch shell, and a contact connecting rod is inserted into an inner hole of the first electromagnetic coil and the second electromagnetic coil simultaneously, a moving contact matched with the fixed contact is arranged on the contact connecting rod, the contact connecting rod is located on one side, away from the fixed contact, of the moving contact is sequentially provided with a fixed sleeve, a first insulating sleeve and a sliding sleeve are arranged on the contact connecting rod, and a first moving iron core and a fixed sleeve are arranged on the contact connecting rod The switch comprises a main wiring seat, a first insulation sleeve, a second movable iron core, a movable contact, a stop iron, a first spring, a second electromagnetic coil and a relay, wherein the movable contact is positioned in an inner cavity of the main wiring seat, the stop iron is fixedly connected to the switch shell in a sleeved mode in a sliding mode on the first insulation sleeve, the maximum outer diameter of the first insulation sleeve is larger than the minimum diameter of an inner hole of the first movable iron core, the first spring is arranged between the stop iron and the first movable iron core, the second spring is arranged between the first movable iron core and the second movable iron core, one end of the second electromagnetic coil is electrically connected with the control circuit board, the other end of the second electromagnetic coil is electrically connected with the relay, one end of the first electromagnetic coil is electrically connected with an output end of the motor, the other end of the first electromagnetic coil is electrically connected with the relay, and the static contact is electrically connected with an input end of the motor.

As an improvement of the present invention, a rotating shaft in transmission connection with an output shaft of the motor, a sliding electromagnetic assembly for driving the rotating shaft to slide in a direction away from the motor, and a return spring for pushing the rotating shaft to slide in the direction of the motor are further disposed in the housing, one end of the sliding electromagnetic assembly is electrically connected to the relay, and the other end of the sliding electromagnetic assembly is electrically connected to the control circuit board.

As an improvement of the utility model, a proximity switch matched with the sliding electromagnetic assembly or the rotating shaft is arranged in the shell, and the proximity switch is electrically connected with the control circuit board.

As an improvement of the utility model, a side of the switch housing away from the main wire holder is fixedly connected with a secondary wire holder, and the relay and the control circuit board are respectively arranged on the secondary wire holder.

As an improvement of the utility model, one side of the switch shell facing the auxiliary wire holder is provided with a threading hole communicated with an inner cavity of the auxiliary wire holder.

As an improvement of the utility model, a second insulating sleeve is slidably connected to the contact connecting rod, the moving contact is fixedly connected to the second insulating sleeve, and a third spring is arranged between the second insulating sleeve and the first insulating sleeve.

By adopting the technical scheme, the utility model has the following beneficial effects:

1. the first electromagnetic coil and the second electromagnetic coil are separated through the partition plate, the two movable iron cores are respectively arranged to be matched with the two electromagnetic coils in a one-to-one mode, the first electromagnetic coil serves as a slow meshing coil and provides pre-rotation current for the starter, the second electromagnetic coil serves as an attraction coil of the movable and fixed contacts, the two groups of electromagnetic coils are relatively independent, the number of turns of the coils can be inconsistent, the design can be flexibly conducted, the current of the electromagnetic coil used for attraction of the movable and fixed contacts by the switch can be reduced, the heat productivity is reduced, the risk of burning the switch is reduced, and the service life of the starter is relatively long.

2. Because two solenoid are relatively independent, the pulling fork power is less, and pinion pulling force on the rotating shaft is relatively less, and the meshing impact with the engine flywheel gear ring is relatively less, so that the flywheel gear ring and the pinion are not easy to damage, and the service life of the starter is further prolonged.

3. The electromagnetic component that slides through the setting replaces driven shift fork to realize the promotion to the output shaft, can not produce the reaction force of effect on the switch, more can not have the reaction force of effect on the switch contact, and reliability and stability are higher relatively.

4. The main wiring seat provided with the static contact and the auxiliary wiring seat provided with the relay are arranged on two sides of the switch shell, the structure is compact, the layout is reasonable, wiring is convenient, meanwhile, a connecting wire between the two wiring seats can be embedded without being exposed through the threading hole, and the failure rate is relatively low.

Drawings

FIG. 1 is a sectional schematic view of a starter in an embodiment;

FIG. 2 is a schematic diagram of a control circuit of the starter in the embodiment;

fig. 3 is a partially enlarged view of a portion at a in fig. 1.

The designations in the figures correspond to the following:

10-a housing; 11-a motor;

12-a rotating shaft; 13-a return spring;

20-an electromagnetic switch; 21-a control circuit board;

22-a relay; 23-a main wire holder;

24-a switch housing; 25-secondary wire holder;

26-a first electromagnetic coil; 27-a second electromagnetic coil;

28-a stationary contact; 29-a partition plate;

30-a sliding electromagnetic assembly; 31-a retainer ring;

32-sliding movable iron core; 33-a coil holder;

34-a slip solenoid; 35-a limiting part;

40-contact connecting rod; 41-coil framework;

42-moving contact; 43-a first insulating sleeve;

44-a first plunger; 45-a second movable iron core;

46-a second insulating sleeve; 47-stop iron;

48-a first spring; 49-a second spring;

50-third spring.

Detailed Description

The utility model is further described with reference to the following figures and specific embodiments.

As shown in fig. 1 to fig. 3, the present embodiment provides a starter, which includes a housing 10 and an electromagnetic switch 20 fixedly connected to the housing 10, where the electromagnetic switch 20 may also be used to replace an electromagnetic switch of another starter, that is, the present embodiment substantially also provides an electromagnetic switch for a starter.

The motor 11 is disposed in the casing 10, and a rotating shaft 12 in transmission connection with an output shaft of the motor 11, a pinion gear (where the small of the pinion gear refers to that the outer diameter of the gear is small relative to the outer diameter of the flywheel ring gear, and does not refer to an actual size) mounted on the rotating shaft 12 and used for matching with a flywheel ring gear of an engine, a sliding electromagnetic assembly 30 for driving the rotating shaft 12 to slide in a direction away from the motor 11, and a return spring 13 for pushing the rotating shaft 12 to slide in a direction toward the motor 11 are further disposed in the casing 10, where a specific transmission connection structure of the rotating shaft 12 and the motor 11 is the same as that of a conventional starter, and is not a focus of the embodiment of the present year, and is not described in detail here. The slipping electromagnetic component 30 comprises a retaining ring 31 fixedly sleeved on the rotating shaft 12, a sleeve sleeved on the rotating shaft 12 and abutting against the retaining ring 31 towards a slipping movable iron core 32 on one side of the motor 11, a coil retainer 33 arranged around the slipping movable iron core 32 and fixedly connected to the rotor 10 and a slipping electromagnetic coil 34 arranged around the coil retainer 33, wherein the coil retainer 33 is integrally connected with a limiting part 35 positioned on one side of the slipping movable iron core 32 far away from the retaining ring 31, one end of a return spring 13 abuts against one side of the retaining ring 31 far away from the motor 11, the other end of the return spring directly or indirectly abuts against the casing 10, when the slipping electromagnetic coil 34 is electrified, the slipping movable iron core 32 can push the rotating shaft 12 to slip in the direction far away from the motor 11 through the retaining ring 31 under the action of a magnetic field and compress the return spring 13 so as to realize meshing connection between the starter and the engine, and the specific meshing connection structure is the same as the meshing connection structure between the conventional starter and the engine, when the sliding solenoid 34 is de-energized, the spindle 12 is reset by the return spring 34.

Preferably, a proximity switch (not shown) is disposed in the housing 10 and is engaged with the plunger 32 or the shaft 12 of the sliding solenoid assembly 30, and the solenoid 34 is de-energized when the proximity switch senses a predetermined position of the plunger 32 or the shaft 12. In the present embodiment, a proximity switch is described as an example in conjunction with the sliding core 32.

The electromagnetic switch 20 includes a control circuit board 21, a relay 22 electrically connected to the control circuit board 21, and a main terminal block 23 and a switch housing 24 fixedly connected to each other, wherein the control circuit board 21 is a conventional circuit board, and can be directly purchased in the market and set according to actual functions. Preferably, a side of the switch housing 24 away from the main wire holder 23 is fixedly connected with a secondary wire holder 25, the relay 22 and the control circuit board 21 are respectively arranged on the secondary wire holder 25, that is, the relay 22 and the control circuit board 21 electrically connected with the relay 22 are arranged on the secondary wire holder 25, of course, the control circuit board 21 is also electrically connected with a first electromagnetic coil 26 and a second electromagnetic coil 27 which will be mentioned below, and the proximity switch is also electrically connected with the control circuit board 21.

The main wire holder 23 is provided with a fixed contact 28, the switch housing 24 is provided with a first electromagnetic coil 26, a partition plate 29, a second electromagnetic coil 27 and a contact connecting rod 40, the first electromagnetic coil 26, the partition plate 29, the second electromagnetic coil 27 and the contact connecting rod 40 are sequentially arranged along the axial direction of the switch housing 24, the contact connecting rod 40 is simultaneously inserted into inner holes of the first electromagnetic coil 26 and the second electromagnetic coil 27, specifically, the switch housing 24 is provided with a coil framework 41, the first electromagnetic coil 26 and the second electromagnetic coil 27 are both arranged on the coil framework 41, the partition plate 29 is fixedly connected with the switch housing 24, and the contact connecting rod 40 is inserted into the coil framework 41 and is not in contact with the coil framework 41. The contact connecting rod 40 is provided with a movable contact 42 which is matched with the fixed contact 28, and the movable contact 42 is positioned in the inner cavity of the main wiring holder 23. The contact connecting rod 40 is sequentially provided with a first insulating sleeve 43 fixedly sleeved on the contact connecting rod 40, a first movable iron core 44 slidably sleeved on the contact connecting rod 40 and a second movable iron core 45 fixedly sleeved on the contact connecting rod 40 on one side of the movable contact 42 away from the static contact 28, wherein a stop iron 47 fixedly connected to the switch shell 24 is slidably sleeved on the first insulating sleeve 43, the maximum outer diameter of the first insulating sleeve is larger than the minimum diameter of an inner hole of the first movable iron core 44, and thus the first movable iron core 44 can drive the contact connecting rod 40 to move by pushing the first insulating sleeve 43. A first spring 48 is provided between the stopper 47 and the first movable iron core 44, and a second spring 49 is provided between the first movable iron core 44 and the second movable iron core 45, so as to achieve the return.

Preferably, the contact connecting rod 40 is slidably connected to a second insulating sleeve 46, the movable contact 42 is fixedly connected to the second insulating sleeve 46, and a third spring 50 is disposed between the second insulating sleeve 46 and the first insulating sleeve, so that rigid collision during attraction between the movable contact and the fixed contact can be avoided.

One end of the second electromagnetic coil 27 is electrically connected with the control circuit board 21, the other end is electrically connected with the relay 22, one end of the first electromagnetic coil 26 is electrically connected with the output end of the motor 11, the other end is electrically connected with the relay 22, and the static contact 28 is also electrically connected with the input end of the motor 11. In addition, the moving contact 42, the motor 11, the control circuit board 21 and other elements need to be connected to a power supply, which is not part of the starter or the electromagnetic switch 20 provided in the present embodiment, and is usually a storage battery installed on a vehicle, and the specific connection structure of the elements is the same as that of a conventional starter, which is not a key point of the present embodiment, and is not described in detail here, and can be connected with reference to fig. 2.

Preferably, one side of the switch housing 24 facing the auxiliary wire holder 25 is provided with a threading hole communicated with the inner cavity of the auxiliary wire holder 25, so that a connecting wire between the two wire holders can be embedded without being exposed, and the failure rate is relatively low.

When the starter is used, after the control circuit board 21 is conducted with a power supply, the relay 22 is immediately controlled to be closed, so that the first electromagnetic coil 26 and the sliding electromagnetic coil 34 are electrified, the first movable iron core 44 drives the contact connecting rod 40 to move towards the direction of the fixed contact 28 for a certain stroke, the movement stroke required by the attraction of the movable and fixed contacts is shortened, meanwhile, the sliding iron core 32 pushes the rotating shaft 12 to slide towards the direction away from the motor 11, so that a gear on the starter is meshed with a gear ring on the engine (the installation structure of the gear on the starter is the same as that of a conventional starter, the gear ring on the engine does not belong to one part of the starter provided by the embodiment, but is a part matched with the gear ring on the starter), the second electromagnetic coil 27 is controlled to be powered on, the second movable iron core 45 continues to drive the contact connecting rod 40 to move towards the direction of the static contact 28, so that the movable contact 42 and the static contact 28 are in contact with each other, at the moment, the first electromagnetic coil 26 is powered off due to short circuit, and the motor 11 rotates at full power; after the starting is successful, the control circuit board 21 is powered off, and the iron cores are reset under the action of the corresponding springs.

The present invention is described in detail with reference to the attached drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention based on the prior art, which fall within the scope of the present invention.

Claims

1. A starter comprises a shell and an electromagnetic switch fixedly connected to the shell, and is characterized in that a motor is arranged in the shell, the electromagnetic switch comprises a control circuit board, a relay electrically connected with the control circuit board, a main wiring seat and a switch shell fixedly connected with each other, a fixed contact is arranged on the main wiring seat, a first electromagnetic coil, a partition plate and a second electromagnetic coil which are sequentially arranged along the axis direction of the switch shell, and a contact connecting rod which is simultaneously inserted into inner holes of the first electromagnetic coil and the second electromagnetic coil in a penetrating manner are arranged in the switch shell, a moving contact matched with the fixed contact is arranged on the contact connecting rod, and a first insulating sleeve, a second insulating sleeve and a fixed contact sleeve are sequentially arranged on one side of the moving contact connecting rod, which is far away from the fixed contact, on the contact connecting rod, A first movable iron core which is sleeved on the contact connecting rod in a sliding way and a second movable iron core which is fixedly sleeved on the contact connecting rod, the moving contact is positioned in the inner cavity of the main wiring seat, the first insulating sleeve is sleeved with a stop iron fixedly connected with the switch shell in a sliding way, the maximum outer diameter of the first insulating sleeve is larger than the minimum diameter of the inner hole of the first movable iron core, a first spring is arranged between the stop iron and the first movable iron core, a second spring is arranged between the first movable iron core and the second movable iron core, one end of the second electromagnetic coil is electrically connected with the control circuit board, the other end of the second electromagnetic coil is electrically connected with the relay, one end of the first electromagnetic coil is electrically connected with the output end of the motor, the other end of the first electromagnetic coil is electrically connected with the relay, and the static contact is electrically connected with the input end of the motor.

2. The starter according to claim 1, wherein a rotating shaft in transmission connection with the output shaft of the motor, a sliding electromagnetic assembly for driving the rotating shaft to slide in a direction away from the motor, and a return spring for pushing the rotating shaft to slide in the direction of the motor are further disposed in the housing, one end of the sliding electromagnetic assembly is electrically connected to the relay, and the other end of the sliding electromagnetic assembly is electrically connected to the control circuit board.

3. The starter according to claim 2, wherein a proximity switch is arranged in the casing and is matched with the sliding electromagnetic assembly or the rotating shaft, and the proximity switch is electrically connected with the control circuit board.

4. The starter motor according to any one of claims 1 to 3, wherein a sub-wire holder is fixedly attached to a side of the switch housing away from the main wire holder, and the relay and the control circuit board are respectively provided on the sub-wire holder.

5. The starter as claimed in claim 4, wherein a side of the switch case facing the sub-wire holder is provided with a wire passing hole communicating with an inner cavity of the sub-wire holder.

6. The starter as claimed in any one of claims 1 to 3, wherein a second insulating sleeve is slidably connected to the contact connecting rod, the movable contact is fixedly connected to the second insulating sleeve, and a third spring is arranged between the second insulating sleeve and the first insulating sleeve.