KR20230112253A - Solenoid assembly for automobile start motor - Google Patents

Abstract

The present invention relates to a solenoid assembly for an automobile start motor. The solenoid assembly for an automobile start motor shuts off or supplies a current from a battery to an armature assembly to start an engine and comprises: a plunger (130) sliding in a case (110) and having a rod flange (131) formed on the front end thereof in an annular groove shape with a narrow front and a wide rear; a rod body (140) having a thread groove (141) formed in the middle of the front end thereof and an annular stake (142) formed on the rear end thereof and corresponding to the inner shape of the rod flange (131) to be inserted and fixed; a rod screw (150) having a head (151) and a shoulder part (154) formed on the front end thereof and a thread part (155) formed on the rear end thereof and coupled to the thread groove (141) to slide with the plunger (130) and the rod body (140); a contact plate (160) fixed on the shoulder part (154) at the front end of the rod screw (150), and selectively coming in contact with a terminal part provided on a cover (120) to switch a current; and a stop plate (170) coupled to the front side of the case (110) and having a rod sliding hole (171) formed in the middle thereof and provide with a spring (172) loaded therein to guide the sliding state of the contact plate (160) and the plunger (130) on the front and rear sides respectively. Durability and performance are improved.

Description

Solenoid assembly for automobile start motor {SOLENOID ASSEMBLY FOR AUTOMOBILE START MOTOR}

The present invention relates to a solenoid assembly for a vehicle start motor, and more particularly, to a start motor mounted on a vehicle for engine start-up to switch the supply of current in conjunction with a battery.

In general, since the engine of a vehicle does not have a starting capability, a starting system for initially rotating the engine is provided.

The starting system includes a start motor that generates torque by cranking the engine, and a battery that supplies power to the start motor.

The start motor consists of a solenoid assembly, an armature assembly, and a driver assembly. When current is supplied by the operation of the solenoid switch, rotational power by the armature (armature) is transmitted to the flywheel of the engine via the driver assembly to start the engine.

The solenoid assembly has a B terminal connected to the battery, an S terminal to receive an ignition signal, and an M terminal connected to the armature assembly. The solenoid assembly is provided to actuate the pinion and the flywheel ring gear to mesh with each other and supply or block current to the armature assembly to apply rotational power.

Looking at the schematic structure of a start motor with reference to the conventionally known technology, Korean Utility Model Publication No. 20 - 1999 - 0014892 discloses an armature core, an armature coil, a commutator and an armature shaft generating rotational force, and a driver assembly composed of a driver shaft, a speed reducer, an overrunning clutch, and a connecting pinion to rotate the ring gear of an engine by receiving the rotational force of the armature assembly, and a driver. As a means for controlling the connection pinion of the assembly, a start motor for a vehicle including a solenoid composed of a pull-in coil, a holding coil, an operating plunger, and a main switch is constituted.

Looking at the schematic configuration of the solenoid assembly through known technology, for example, Korean Utility Model Publication No. 20 - 0446656 discloses a starter motor solenoid switch for a vehicle in which a spool bobbin wound with a pull-in and hold-in coil inside the case and a plunger for moving an operating lever connected to the shell of the driver assembly are provided, and a switch cover having a battery terminal and a field coil terminal is press-fitted at the end of the case.

As another example, Korean Utility Model Publication No. 20 - 1997 - 0011386 discloses a plunger that slides in a coil bobbin in a solenoid housing of a starter motor, and a contact contact member for opening and closing an electrical contact according to the operation of the end of the plunger. The starter motor solenoid is inserted into the bulkhead and slides while being pushed by a return spring.

Korean Utility Model Publication No. 20 - 1999 - 0014892 (1999.05.06) Korea Utility Model Registration No. 20 - 0446656 (2009.11.17) Korean Utility Model Publication No. 20 - 1997 - 0011386 (1997.03.29) Korean Utility Model Publication No. 20 - 1999 - 0016895 (May 25, 1999)

The solenoid assembly for a vehicle start motor to which the prior art is applied is configured so that a predetermined rod slides a contact contact member to open and close an electrical contact according to the operation of a plunger sliding in a coil bobbin of a housing.

Specifically, the rod applied to the conventional solenoid assembly is made of an aluminum rod shape, the rear end is mounted on the plunger, and the front end is provided in the form of a hexagonal head or rivet head to combine a contact contact member and a washer.

However, such a configuration of the prior art has a problem in that the front end portion made of aluminum, which has weak durability, is easily damaged by repeated impact on the bulkhead in the process of returning the contact contact member to its original position by the elasticity of the spring.

In particular, in the prior art, parts such as rods or contact members and washers are easily worn during assembly and operation, accelerate damage due to friction with peripheral parts such as housings, cause excessive vibration and device loads, or poor contact with terminals. There are problems such as causing overall performance degradation and inoperability of the starter motor.

Accordingly, the present invention was invented to solve the problems of the prior art as described above,

A solenoid assembly for a vehicle start motor provided to start an engine by supplying or blocking current from a battery to an armature assembly,

The solenoid assembly 100,

A plunger 130 having a rod flange 131 sliding inside the case 110 but formed in the shape of an annular concave shape of a line-narrow halo at the tip;

A rod body 140 having a thread groove 141 formed at the center of the front end and an annular stake 142 corresponding to the inner shape of the rod flange 131 at the rear end to be inserted and fixed;

A head 151 and a shoulder portion 154 are formed at the front end and a threaded portion 155 coupled to the thread groove 141 is formed at the rear end to slide with the plunger 130 and the load body 140. A load screw 150,

A contact plate 160 fixed to the shoulder portion 154 at the front end of the load screw 150 and configured to switch current by selectively contacting the terminal portion provided on the cover 120;

By forming a rod sliding hole 171 coupled to the front side of the case 110 and mounting a spring 172 at the center thereof, the contact plate 160 and the plunger 130 are provided to guide the sliding state of the contact plate 160 and the plunger 130 at the center. By including a stop plate 170, it is possible to achieve the purpose of improving durability and performance.

The present invention provides a solenoid assembly for a vehicle start motor capable of improving durability and performance by differentiating the configuration of a solenoid assembly provided to switch the supply of current in conjunction with a battery in a start motor mounted in a vehicle to start an engine.

In particular, the present invention forms a rod that slides the contact plate in conjunction with a plunger to form a double coupling structure to enhance durability and fixing force, thereby preventing damage to the rod and spinning of the contact plate, as in the prior art, and solving problems such as damage and poor contact of peripheral parts, resulting noise and vibration, and device load, thereby stably maintaining the performance of the solenoid assembly.

1 is a perspective view of a solenoid assembly for a vehicle start motor according to the present invention.
Figure 2 is an exploded perspective view of a solenoid assembly for a vehicle start motor according to the present invention.
Figure 3 is an exploded perspective view of main parts of the solenoid assembly for a vehicle start motor according to the present invention.
Figure 4 is a side view of a solenoid assembly for a vehicle start motor according to the present invention.
5 is a cross-sectional view of a main part of a solenoid assembly for a vehicle start motor according to the present invention.
Figure 6 is a perspective view, front and side views of the load body of the solenoid assembly for a vehicle start motor according to the present invention.
Figure 7 is a perspective view, front and side views of the load screw of the solenoid assembly for a vehicle start motor according to the present invention.
8 is a perspective view and front and side views of a contact plate of a solenoid assembly for a vehicle start motor according to the present invention.
9 to 10 are perspective and cross-sectional views of the inside of the cover of the solenoid assembly for a vehicle start motor according to the present invention.

Hereinafter, the configuration and operation according to a preferred embodiment of the solenoid assembly for a vehicle start motor of the present invention will be described in detail with reference to the accompanying drawings. In the following description, detailed descriptions of parts that can be easily implemented by those skilled in the art may be omitted. In addition, since the following description describes a preferred embodiment of the present invention, the present invention is not limited by the following examples, and various modifications may be provided without departing from the scope of the present invention.

It is noted that the solenoid assembly for a vehicle start motor to which the technology of the present invention is applied is configured to improve durability and performance in a solenoid assembly provided to switch the supply of current in conjunction with a battery in a start motor mounted in a vehicle to start the engine.

In the present invention, in the solenoid assembly 100 for a vehicle start motor provided to start the engine by supplying or cutting off current from the battery to the armature assembly as described above, the plunger 130, the load body 140, the load screw 150, the contact plate 160, and the stop plate 170 are included inside the case 110 and the cover 120, and are specifically configured as follows.

The cover 120 of the solenoid assembly 100 is coupled to the opening of the ship side of the case 110, and has a B terminal connected to the battery, an S terminal to receive an ignition signal, and an M terminal connected to the armature assembly to the outside.

Inside the cover 120, a contact entry/exit groove 121 is formed between the B terminal and the M terminal so that a contact plate 160 to be described later can enter and exit.

A gap holding groove 122 is formed at the center of the contact entry/exit groove 121 to accommodate the head 151 of the load screw 150 to be described later.

The case 110 of the solenoid assembly 100 is formed in a predetermined cylindrical shape and includes a plunger 130, a load body 140, a load screw 150, and a contact plate 160 to slide inside, and a stop plate 170 is mounted on the side of the ship.

The plunger 130 slides inside the case 110, but has a rod flange 131 formed in the shape of an annular concave shape of a line-narrow halo at the front end.

A coil and a return spring 172 are mounted at the rear end of the plunger 130, and when current is applied from the battery to the solenoid assembly 100 by the operation of the ignition switch of the vehicle, it is magnetized and slides toward the front and rear.

The rod flange 131 formed at the front end of the plunger 130 is formed to insert and fix the stake 142 of the rod body 140 to be described later.

The rod flange 131 is formed by concave inward from the tip of the plunger 130, but the lateral portion 132 is provided in the shape of a line-narrow halo so as to firmly bind the annular stake 142, so that the binding force is maintained even in a high vibration environment during sliding.

The rod body 140 has a threaded groove 141 formed at the center of the front end and an annular stake 142 corresponding to the inner shape of the rod flange 131 at the rear end to be inserted and fixed.

The load body 140 is formed by forging an aluminum material to form an annular stake 142 at the rear end of the cylindrical body and a threaded groove 141 having a certain depth at the front end.

The stake 142 is inserted into the inside of the rod flange 131 and is fixed by the stake part 132 so that the plunger 130 and the rod body 140 slide integrally.

The thread groove 141 accommodates the threaded portion 155 of the load screw 150 inside and engages it in a fastening manner to ensure high earthquake resistance.

The load screw 150 has a head 151 and a shoulder portion 154 formed at the front end and a threaded portion 155 coupled to the thread groove 141 at the rear end to slide with the plunger 130 and the load body 140.

The load screw 150 is formed of a stainless material to form a threaded portion 155 at the rear end of the cylindrical body and a head 151 and a shoulder portion 154 at the front end.

The thread part 155 is configured to secure high earthquake resistance by being coupled to the thread groove 141 of the load screw 150 in a fastening manner.

A contact plate 160, which will be described later, is mounted on the shoulder part 154 so that when the load screw 150 slides together with the load body 140 and the plunger 130, the case 110 is equipped to enter and exit the load sliding hole 171 of the stop plate 170.

The head 151 is formed in a Round Torx type that forms a plurality of lobes 152 at the center of the front end to fasten the threaded portion 155, and a washer 153 is integrally formed on the rear surface of the head 151 to strengthen the fixing and fastening force of the contact plate 160 to be described later. When the contact plate 160 impacts the stop plate 170, the conventional hexagon head and washer are individually It is configured to prevent damage to the head 151 compared to the assembled configuration.

Since the contact plate 160 to be described later is fixed to the rear surface of the head 151 and the washer 153, a spacing groove 122 is formed inside the cover 120 to accommodate the outer shape of the head 151. Therefore, when the contact plate 160 contacts the inner terminal portion of the cover 120, the cover 120 is prevented from being damaged due to interference of the head 151.

A fixing layer (not shown) is formed in the thread groove 141 of the load body 140 or the thread portion 155 of the load screw 150 to integrally couple and fix the load screw 150 to the load body 140 when assembled.

The fixing layer is formed by applying an adhesive compound to the thread groove 141 or the thread portion 155 before combining the load body 140 and the load screw 150, thereby integrally fixing and operating even in a high vibration environment.

The contact plate 160 is fixed to the shoulder portion 154 at the front end of the load screw 150 and selectively contacts terminal portions provided on the cover 120 to switch current.

The contact plate 160 is formed in a rectangular plate shape made of a conductor and fixed to the shoulder portion 154 of the load screw 150 . The contact plate 160 is configured to slide toward the contact entry/exit groove 121 inside the cover 120 together with the rod body 140 and the plunger 130.

An insulator 161 is coupled to the line and the rear side of the contact plate 160 to insulate current between the head 151 and washer 153 provided on the front side of the contact plate 160 and the stop plate 170 located on the rear side and in contact with each other.

The contact plate 160 forms a first contact portion 162 and a second contact portion 163 symmetrical to each other around the load screw 150 .

The first contact portion 162 and the second contact portion 163 simultaneously contact and interrupt the B terminal and the M terminal provided inside the contact entry/exit groove 121 to supply current to apply power.

In addition, the first contact portion 162 and the second contact portion 163 form a tapered portion 164 from the center toward both ends.

The tapered portion 164 is provided to form a narrow width at the end portion compared to the center portion, so as to overcome the problems of dust, defective contact, and vibration caused by friction and impact with the cover 120 made of plastic when the contact plate 160 slides in the prior art, and is configured to reduce vibration by excluding interference with the contact entry/exit groove 121 provided with the inner terminal portion of the cover 120.

The stop plate 170 is coupled to the front side of the case 110 and forms a rod sliding hole 171 in which a spring 172 is mounted at the center thereof to guide the sliding state of the contact plate 160 and the plunger 130 at the front and rear sides, respectively.

The stop plate 170 is provided so that the load body 140 and the load screw 150 slide through a rod sliding hole 171 formed to penetrate the center, so that the contact plate 160 controls the current between the stop plate 170 and the terminal portion of the cover 120.

The plunger 130, the load body 140, the load screw 150, and the contact plate 160 are elastically returned to the inside of the rod sliding hole 171 by accommodating the spring 172 between the plunger 130 and the base plate 170.

Looking at the schematic assembly and operating state of the solenoid assembly for a vehicle start motor of the present invention having the configuration as described above, it is as follows.

The solenoid assembly 100 for a vehicle start motor includes a cover 120 having terminals, a case 110 including a plunger 130, a load body 140, a load screw 150, and a stop plate 170, and a contact plate 160 mounted on the load screw 150 and sliding inward of the cover 120 to contact the terminals.

The stake 142 of the rod body 140 is inserted into the rod flange 131 formed at the front end of the plunger 130, and the stake 132 is formed into a line-narrow halo to be firmly fixed.

The head 151 and the washer 153 are integrally formed at the front end of the load screw 150, and the contact plate 160 is fixed to the rear shoulder portion 154 of the head 151 and the washer 153. An insulator 161 is coupled to the front and back sides of the contact plate 160 .

A fixing layer is formed on the thread groove 141 of the load body 140 or the thread portion 155 of the load screw 150, and the thread portion 155 is fastened to the thread groove 141 to be integrally assembled and fixed. The contact plate 160 is assembled to maintain a certain direction.

The contact plate 160 is located on the front side of the stop plate 170 mounted on the case 110, and the load screw 150 and the load body 140 are provided through the rod sliding hole 171. A spring 172 is mounted between the plunger 130 and the rod damp hole to return to the original position after starting.

When current is applied from the battery to the solenoid assembly 100, the plunger 130 inside the case 110 advances, and the load body 140, the load screw 150, and the contact plate 160 start at the stop plate 170. Move toward the cover 120. The contact plate 160 moves inside the contact entry/exit groove 121, and the head 151 of the load screw 150 is accommodated in the gap holding groove 122, so that the first contact portion 162 and the second contact portion 163 contact the B terminal and the M terminal, and supply current to the armature assembly.

Since the tapered portion 164 is formed at both ends of the contact plate 160, even when the first contact portion 162 and the second contact portion 163 are repeatedly slid, interference with peripheral components including the contact entry/exit groove 121 is excluded and contacts the terminal portion.

Hereinafter, a test example including the present invention composed of the above-described configuration will be configured and the effect thereof will be closely grasped.

<Test example>

In the solenoid assembly for a car start motor according to the present invention, a test is conducted to confirm the effect of the rod flange 131 provided on the plunger 130 and the stake 142 provided on the load body 140.

A total of 10 tests were conducted to measure the torque at the time of rotation by applying a rotational force to the rod body 140 from the fixed plunger 130 as a starting point, and the results are shown in Table 1 below.

SPL No. One 2 3 4 5 6 7 8 9 10 Max Min Ave Torque(Nm) 13.2 16.7 16.7 15.7 15.7 16.7 14.7 17.6 14.7 14.7 17.6 13.2 15.6

As a result of the test, the minimum torque required to rotate the load body 140 was measured to be 13.2 Nm. Considering that the standard torque of an M5 screw, such as a hexagon bolt type rod according to the prior art, is up to 6.0 Nm, it can be confirmed that the configuration of the rod flange 131 and the stake 142 according to the present invention acts to secure sufficient torque to firmly maintain the rod body 140 in a fixed state.

As described above, the solenoid assembly for a vehicle start motor according to the present invention differs from the conventional configuration of a solenoid assembly provided to switch the supply of current in conjunction with a battery in a start motor mounted on a vehicle to start an engine. There is an advantage that can improve durability and performance.

In particular, the present invention differentiates the structure and coupling relationship of the rod that slides the contact plate 160 in conjunction with the plunger 130 from the prior art, and seeks the effect of enhancing durability and fixing force through a configuration including a rod body 140, a rod screw 150, a rod flange 131, and a stake 142.

In addition, the present invention provides a tapered portion 164 on the contact plate 160 provided to contact the terminal portion to regulate the current, and through a series of configurations including the washer 153-integrated load screw 150 and the fixing layer, there are various effects such as stably maintaining the performance of the solenoid assembly by preventing damage to the rod or damage to surrounding parts and poor contact as in the prior art, and the resulting noise and vibration generation problems, so that the performance of the solenoid assembly can be stably maintained. expected to be large.

100: solenoid assembly 110: case
120: cover 121: contact access groove
122: gap maintaining groove 130: plunger
131: load flange 132: stakeout
140: load body 141: thread groove
142: stake 150: load screw
151: head 152: lobe
153: washer 154: shoulder portion
155: thread part 160: contact plate
161: insulator 162: first contact
163: second contact portion 164: tapered portion
170: stop plate 171: rod sliding hole
172: spring 200: armature assembly
300: driver assembly

Claims (4)

A solenoid assembly for a vehicle start motor provided to start an engine by supplying or blocking current from a battery to an armature assembly,
The solenoid assembly 100,
A plunger 130 having a rod flange 131 sliding inside the case 110 but formed in the shape of an annular concave shape of a line-narrow halo at the tip;
A rod body 140 having a thread groove 141 formed at the center of the front end and an annular stake 142 corresponding to the inner shape of the rod flange 131 at the rear end to be inserted and fixed;
A head 151 and a shoulder portion 154 are formed at the front end and a threaded portion 155 coupled to the thread groove 141 is formed at the rear end to slide with the plunger 130 and the load body 140. A load screw 150,
A contact plate 160 fixed to the shoulder portion 154 at the front end of the load screw 150 and configured to switch current by selectively contacting the terminal portion provided on the cover 120;
The contact plate 160 and the plunger 130 are coupled to the front side of the case 110 and a rod sliding hole 171 is formed at the center to mount the spring 172, so that the contact plate 160 and the plunger 130 are guided. A solenoid assembly for a car start motor, characterized in that it includes a stop plate 170. According to claim 1,
A fixing layer is formed on the thread groove 141 of the load body 140 or the thread portion 155 of the load screw 150 so that the load screw 150 is integrally coupled and fixed to each other when assembling the load body 140. Solenoid assembly for a car start motor, characterized in that. According to claim 1,
The contact plate 160,
A plate-shaped first contact portion 162 and a second contact portion 163 symmetrical to each other around the load screw 150 are formed, and the first contact portion 162 and the second contact portion 163 are fixed to the shoulder portion 154 to maintain a certain direction,
The first contact portion 162 and the second contact portion 163 form a tapered portion 164 from the center toward both end portions to interfere with the contact entry/exit groove 121 provided with the inner terminal portion of the cover 120. A solenoid assembly for an automobile start motor, characterized in that configured to reduce vibration. According to claim 1,
The load screw 150 is made of stainless steel, and a washer 153 is integrally formed on the rear surface of the head 151 to prevent damage to the head 151 when the contact plate 160 impacts the stop plate 170,
A gap holding groove 122 is formed on the inside of the cover 120 to accommodate the outer shape of the head 151 to prevent damage to the cover 120 when the contact plate 160 contacts the terminal unit. Solenoid assembly for a car start motor, characterized in that.

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