DE102006042683A1 - Motor starter equipped with a locking feature - Google Patents

Abstract

A permanent engagement starter for a machine is provided which is equipped with a pinion which is placed in permanent engagement with a ring gear coupled to an engine to transfer the torque of an output shaft of the starter to the ring gear for cranking the engine. The starter further includes a one-way clutch disposed on an armature shaft of an electric motor mounted in the starter and a shutter mounted in the one-way clutch. The one-way clutch operates to allow the armature shaft to rotate only in a normal direction. The shutter operates to block leakage of the lubricant used in the one-way clutch toward the engine, thereby avoiding sticking of the lubricant to brushes or the commutator of the motor to ensure a desired lifetime of the starter.

Description

BACKGROUND OF THE INVENTION

1. TECHNICAL AREA THE INVENTION

The The present invention generally relates to a structure of a Constant engagement starter or permanent engagement starter designed is to get a pinion that is in constant engagement with a ring gear a car machine is placed, and in particular on such a starter, which is equipped with a sealing feature or closure feature, to increase the life span of the same.

2. BACKGROUND TECHNOLOGY

It Solenoid or solenoid induction thrusters are known that are designed are to engage a pinion with a ring gear of a machine to push with internal combustion or internal combustion engine. This Starter type stops the pinion out of engagement with the ring gear, except when the machine is started. If it is necessary in particular To start the machine, the starter works to get the pinion in to advance an engagement with the ring gear to the torque, as it is by an electric motor built into the starter, is generated to transfer to the ring gear to to crank up the machine. When the ignition switch from the start position to the on position after starting or starting the machine brought back the starter puts the pinion in an unengaged position from that Ring gear.

While the Machine, before it is stopped, free running, the ring gear usually rotates at high speeds. Own the solenoid push-starters therefore a difficulty in engaging the pinion with the ring gear, to restart the engine before the machine is completely stopped.

It There are also known permanent engagement starters designed to the pinion in a constant engagement with the ring gear of the machine directly or to be placed by an intermediate gearbox. The Japanese Patent First No. 2004-225544 discloses such a starter type.

The Permanent engagement starters are designed to engage the pinion to hold with the ring gear even after starting the engine and are therefore able to Restart the machine before the machine is completely stopped is. The solenoid push-on starter generates an engagement of the Pinion gear with the ring gear mechanical noises, the permanent engagement starter however, they have no such problem and are silent excellent.

If the speed of the machine the speed of the starter after the machine has started up, this will happen cause the pinion to be rotated by the ring gear. Of the Anchor or the runner of the engine installed in the starter becomes particular shot at a speed that is the product of speed the engine and a gear ratio or reduction ratio of the pinion to the ring gear (typically 1: 8-15), resulting in a mechanical Lead breakage of the anchor can result from the centrifugal force acting on the same can.

Around avoiding the previous problem is usually an overrunning clutch installed in the starter or connected to the ring gear. The overrunning clutch is designed to run freely when the speed of the machine the speed of the starter has exceeded the transmission a torque of the machine to the anchor of the starter to block.

The overrunning clutch is engaged when the machine due to, for example, vibrations of the Machine, which occur at a stop of the same, opposite was operated. The permanent intervention starters therefore encounter the problem that the opposite torque of the machine undesirable too transmitted to the starter is to turn the armature of the electric motor, resulting in a reduction the lifespan of brushes of the motor or lead to a mechanical breakage of the anchor.

Usually is applied to couplings lubricant to wear or a To minimize seizure of sliding parts of the same. lubricant is however opposite Warmth, which is blasted by the machine, sensitive, such that the same evaporated. The adhesion of such a vaporized lubricant on the brush or the commutator or commutator of the electric motor of the starter leads to a reduced operating time of the engine. Licking the lubricant from the clutch leads further reducing the power of the clutch so that the reliability is reduced during operation of the starter.

SUMMARY THE INVENTION

It is therefore an essential object of the invention to overcome the disadvantages of the prior art avoid.

A Another object of the invention is to provide an improved structure a starter for one To provide a machine equipped with a coupling, which is designed to be an opposite rotation of an anchor to avoid an electric motor, and is designed to have a desired life to ensure the starter.

According to one Aspect of the invention is a starter for a machine created the (a) an electric motor having an armature connected to an armature shaft with one end where a commutator is in contact with brushes for supplying a starting current attached to the anchor is equipped; (b) an output shaft; (c) a one-way clutch disposed on the armature shaft of the engine with the one-way clutch working to allow itself the armature shaft rotates only in a normal direction; (d) one Speed reducer that works to a rotation speed to reduce the armature shaft in the normal direction as it passes through transfer the one-way clutch is to provide a torque to the output shaft; (e) a Pinion, in constant engagement with a ring gear, with the Machine is coupled, placed, with the pinion provided is to turn together with the output shaft to the torque the output shaft to the pinion to start the machine to transfer; and (f) a closure device mounted in the one-way clutch is, has. The closure device works to lick of lubricant used in the one-way clutch to block the engine. This avoids sticking of the lubricant on the brushes or the commutator of the engine, so that a lifetime of the same is ensured and also ensures stability during operation the one-way clutch.

at the preferred mode of the invention includes the one-way clutch Clutch inner, formed integrally with the armature shaft of the motor is a clutch exterior, that is arranged coaxially with the clutch inner and held against rotation is, and a coupling member between the clutch interior and the clutch exterior is on. The clutch member is designed to be disengaged of the clutch interior from the clutch exterior to allow that the armature shaft rotates in the normal direction and around establish a firm engagement with the clutch interior and the clutch exterior, when the torque is opposite to the one-way clutch in one direction to the normal direction acts to transfer the torque to block the armature shaft. If in particular the opposite Torque, as determined by the opposite rotation of the motor is produced, acts on the one-way clutch, it works the same the armature shaft before rotating in the opposite direction to keep, thereby preventing the armature shaft with unintentionally turns high speeds.

The One-way clutch may further comprise a clutch cover, the attached to the clutch exterior is. The closure device may have a closure member, which is arranged in the clutch cover to a hermetic Closure or hermetic seal between the clutch cover and to develop the armature shaft.

The Ensuring stability when freewheeling or engaging the clutch usually requires the coaxial arrangement of the clutch exterior and the clutch interior, around the amount of eccentricity to minimize between them. Ensuring stability in one Sliding movement of the armature and the closure member and a high Degree of ability of the closure member additionally require the coaxial arrangement of the anchor and the lock member.

The Coupling cover is, as described above, on the clutch exterior, the is arranged coaxially with the clutch inner mounted. The Closure member is disposed in the clutch cover. This leads to the coaxial arrangement of the closure member and the clutch inner. The clutch interior is, as described above, integral with the armature shaft formed, whereby a concentricity or a concentricity between the closure member and the armature shaft is ensured. This provides the stability the sliding movement of the armature and the closure member and a high degree of ability of the lock member safely. Attaching the closure member in the clutch cover additionally eliminates the need of additional Parts that are used to attach the closure member to the Armature shaft to arrange coaxially, creating a total generation effort of the starter is minimized.

The Closure member may be made of a rubber, the the clutch cover is fired to make a connection between the Set the closure member and the clutch cover.

The Closing member can by an oil seal or an oil seal Be implemented by the clutch cover before turning retained becomes.

A section of the clutch interior, with Where the closure member is placed in contact may have substantially the same diameter as the same of a remainder of the interior of the coupling. This facilitates the ease of machining the armature shaft with which the clutch inner is integrally formed, and mounting the one-way clutch and the shutter member in assembling the starter without physical interference with the outer surface of the armature shaft.

The Coupling cover can be attached to an outer periphery the clutch exterior press-fitted be. This minimizes a gap between the clutch cover and the clutch exterior, thereby Leakage of lubricant from the clutch is avoided.

Of the Starter may further comprise a second closure member, the on an outer periphery arranged the clutch exterior is to make a hermetic seal between the speed reducer and to set up the engine. This minimizes the leakage of lubricant the clutch or the speed reducer to the engine, thereby an unwanted adhesion of the lubricant to the brushes and the commutator is avoided.

The used in the speed reducer and the one-way clutch Lubricants can each from grease, the base oil, thickener and a Addition, be prepared. The greases are in terms of of the type of base oil identical. This allows the grease in the clutch in the same is mixed in the speed reducer, whereby the need for a closure that locks the clutch from the speed reducer hermetically separates, is eliminated. This leads to a simplified Structure of the starter and at a reduced production cost thereof.

SHORT DESCRIPTION THE DRAWINGS

The The present invention is illustrated in more detail below Description and from the attached Drawings of the preferred embodiments the invention understands the however, not as the invention to the specific embodiments should be construed, but only for the purpose the explanation and understanding serve.

It demonstrate:

1 a partial cross-sectional view showing the structure of a permanent engagement starter for a machine according to the first embodiment of the invention;

2 (a) a vertical partial sectional view showing an internal structure of a one-way clutch, which in the starter of 1 attached, shows;

2 B) a partial cross-sectional view of 2 (a) ;

3 a partial cross-sectional view showing the structure of a permanent engagement starter for a machine according to the second embodiment of the invention;

4 a partial cross-sectional view showing the structure of a permanent engagement starter for a machine according to the third embodiment of the invention;

5 a partial vertical sectional view showing a modification of a one-way clutch in one of the starter of 1 . 3 and 4 can be used;

6 a partial vertical sectional view showing a second modification of a one-way clutch, which in one of the starter of 1 . 3 and 4 can be used;

7 a vertical partial sectional view showing a third modification of a one-way clutch in one of the starter of 1 . 3 and 4 can be used shows.

DESCRIPTION OF PREFERRED EMBODIMENTS

Referring to the drawings, wherein like reference numerals refer to like parts in several views, and in particular: 1 , is a constant intervention starter 1 for use with automatic engine / stop / restart systems for self-propelled vehicles (also referred to as idle-stop systems or eco-driving systems) that operate to drive a car engine, such as when the vehicle is at an intersection or due to a traffic congestion has stopped automatically, and then automatically restart the engine when the vehicle driver performs a given start-up operation (eg, releasing a driver's foot from the brake pedal).

The starter 1 has an electric motor 2 , an electromagnetic switch 3 , a speed reducer 4 , an output shaft 5 , a pinion 6 and a one-way clutch 7 on. The motor 2 operates to generate a torque on an armature shaft (ie an output shaft) thereof. The desk 3 works to main contacts, in a motor driver (also referred to as a motor circuit hereinafter) of the electric motor 2 are attached, open or close to the engine 2 to excite or excite. The speed reducer 4 working to the speed of the engine 2 to reduce and the same to the output shaft 5 transferred to. The pinion 6 is at the end of the output shaft 5 in a permanent engagement with a ring gear 24 the machine attached. The one-way clutch 7 is designed to be the engine 2 before turning in an opposite direction.

The motor 2 is a typical DC motor that works with a field system, as described in detail below, that works to generate a magnetic field, an armature 9 that with a commutator 8th equipped, and a plurality of carbon brushes 10 on the commutator 8th riding, equipped.

The field system is made up of a plurality of permanent magnets 12 at regular intervals along an inner circumference of a yoke 11 , which forms a magnetic circuit, are arranged. Instead of the permanent magnets 12 Alternatively, field coils may be used. The anchor 9 has an anchor coil 15 on, around an anchor core 14 that is connected to an armature shaft 13 is attached, wound. The armature shaft 13 is retained at ends thereof to be rotatable.

The electromagnetic switch 3 is of an exciting coil (not shown) serving as an electromagnet when it is energized by an electric power supplied from a storage battery and a plunger 16 formed within the exciter coil is formed. When energized, the exciter coil creates a magnetic attraction around the plunger core 16 to close the main contacts of the motor circuit. Alternatively, if the excitation coil is de-energized, the magnetic attraction disappears, causing the plunger core 16 is moved backward by a return spring (not shown) to open the main contacts.

The speed reducer 4 is implemented by a typical epicyclic reduction gear train (also called a planetary gear speed reducer) and a sun gear 17 , an annular inner gear 18 and planetary gears 19 that with the gears 17 and 18 are engaged, formed. The sun wheel 17 is at one of the ends of the armature shaft 13 of the motor 2 formed by the commutator 8th is far away. The inner gear 18 is controlled for rotation by a torque limiter, as described in detail below. The speed reducer 4 is adjacent to one end of the one-way clutch 7 arranged.

The torque limiter has a turntable 20 which is restrained from rotating by a frictional pressure. When an excessive torque greater than a holding torque (ie, a set torque) is the turntable 20 from turning on the inner gear 18 acts, will cause the same thing that the turntable 20 against the friction pressure slips or turns, thereby allowing the inner gear 18 rotates to block the transmission of excessive torque to the engine.

The output shaft 5 extends in line with the armature shaft 13 , The output shaft 5 is at one of the ends thereof with the armature shaft 13 through the speed reducer 4 and at the other end with a front housing 22 through a warehouse 21 coupled to be rotatable.

The pinion 6 is through the warehouse 23 to the output shaft 5 fitted and in constant engagement with the ring gear 24 placed. The pinion 6 is with the output shaft 5 mechanically coupled by a shock absorber, as described below.

The shock absorber consists of a first turntable 25 that with the output shaft 5 connected, a second hub 26 that with the pinion 6 connected, and two sets of pillows or buffers 27 between the discs 25 and 26 are arranged. Each of the buffers 27 is made of rubber, for example.

The first turntable 25 is with the periphery of the output shaft 5 coupled by saw-shaped serrations, such that the same input shaft together with the off 5 can turn. The second turntable 26 is by saw-shaped notches with the periphery of a cylindrical portion 6a by a rear end (ie a right end, as in 1 can be seen) of the pinion 6 is defined, coupled, such that it together with the pinion 6 can turn. The buffers 27 are in two (2) sets, in the axial direction of the starter 1 arranged in series, through a middle disc 28 broken down. A total number of buffers 27 is 3 × 2 sets = 6 in this embodiment.

In operation, when the engine having a large amount of inertia energy is cranked, the shock absorber operates to apply an impact torque acting on the engine by compressing the buffers 27 to dampen.

The one-way clutch 7 is from a Kupp development inner 29 attached to the armature shaft 13 fit, a clutch exterior 30 leading to the clutch interior 29 coaxially arranged, cam chambers 31 how clear in 2 B) shown in an inner peripheral wall of the clutch outer 30 are defined, and roles 33 that are inside the cam chambers 31 are retained, formed. Each of the roles 33 is by a spring 32 driven in one direction in which the cam chamber 31 becomes narrow, ie the volume unit of the cam chamber 31 reduced.

The clutch inside 29 is through a section of the armature shaft 13 between the saw-shaped serrations to which the armature core 14 fitted, and the sun gear 17 formed and larger in diameter than the saw-shaped Auszahnungen and the sun gear 17 ,

The clutch exterior 30 is how out 2 can be seen from an annular, disc-shaped exterior 30a with a circular center hole and an annular outer boss or an annular outer projection 30b which is on one of the opposite main surfaces of the exterior 30a is formed, formed. The outer projection 30b has cam chambers 31 which are formed in the inner peripheral wall thereof. Each of the cam chambers 31 is at one of the opposite major surfaces of the outer projection 30b open. After the roles 33 and the springs 32 inside the cam chambers 31 are arranged, the cam chambers 31 through a washer 34 closed. The washer 34 is through a cup-shaped clutch cover 35 firmly restrained.

The clutch exterior 30 has an outer peripheral wall 30a at the end of the yoke 11 is secured by a female connection and to the inner peripheral wall of the front housing 22 is fit. At the outer peripheral wall 30a is a lead 30c formed in the inner peripheral wall of the front housing 22 is fitted and serves as a stop to the clutch exterior 30 to keep from turning.

The coupling 7 works to anchor it 9 to allow to rotate only in a normal direction. If in particular the anchor 9 In the normal direction for cranking the machine is rotated, each of the rollers 33 to a wider one of the ends of a corresponding one of the cam chambers 31 moved so that it slips or idles, thereby allowing the clutch inside 29 rotates. Alternatively, if the torque from the engine to the clutch 7 is transmitted to the armature shaft 13 to turn in a direction opposite to the same to crank the machine, this will cause each of the rollers 33 to a narrower of the ends of the cam chamber 31 is moved and between the clutch exterior 30 and the clutch interior 29 is locked to the clutch inside 39 to keep from turning. This holds the armature shaft 33 before turning in the direction reverse to it, to crank the machine.

The coupling 7 has a lubricant on the inner surfaces of the cam chambers 31 with which the roles 33 are placed in a touch is applied. The coupling 7 also has a closure member 36 to leak the lubricant to the engine 2 to avoid. The closure member 36 is attached to an inner peripheral wall of the clutch cover 35 fitted, such that the same to the outer periphery of the armature shaft 13 borders.

The clutch cover 35 is on the outer periphery of the outer projection 30b press-fitted and has an inner end, that of the rollers 33 is bent away.

The closure member 36 is made of rubber and on the inner wall of the clutch cover 35 attached using firing method. The outer diameter of a section of the clutch interior 29 with which the closure member 36 is placed in an abutment is substantially identical to that of the rest of the clutch interior 29 , The clutch inside 29 In other words, has an outer surface that is uniform in the outer circumference.

The lubricants involved in the clutch 7 and the speed reducer 4 greases made from base oil, thickener and additives are used. The greases are identical in terms of the type of base oil.

If required during operation, the machine 2 to start, and the main contacts of the motor circuit through the electromagnetic switch 3 Be closed, this will cause the coil 15 is excited by the electrical power supplied by the battery to the torque at the armature 9 to create. The rotation of the anchor 9 in the normal direction is through the clutch 7 allowed, such that the torque of the armature 9 to the output shaft 5 through the speed reducer 4 and to the pinion 6 is transmitted to the ring gear 24 to turn, which is the machine is cranked. The machine usually has a large inertial energy. At the moment in which the torque of the pinion 6 on the ring gear 4 As a result, the shock will be generated and the pinion 6 act, that is on the other hand by the shock absorber (ie the compression deformation of the buffer 27 ) is dampened.

When the machine is started up, the main contacts of the motor circuit are opened to the motor 2 turn off, such that the armature shaft 13 stopped before a Dre hen. After starting the machine this will happen when the speed of the machine is the speed of the starter 1 has exceeded, cause a one-way clutch in the ring gear 24 is attached, idles to a separation of the ring gear 24 from the crankshaft of the engine to achieve, thereby transferring the torque of the crankshaft to the ring gear 24 is blocked. This avoids overtaking the anchor 9 ,

When the engine is reversely operated, caused by the swinging of the crankshaft as it is caused to stop the engine, or caused by a backward movement of the vehicle upon an engine stall during the ascent of the vehicle on a slope, such an opposite rotation of the machine to the pinion 6 in permanent engagement with the ring gear 24 is placed, transmitted, which causes the output shaft 5 in a direction opposite to that when the machine is cranked. On the transmission of such a torque of the output shaft 5 to the armature shaft 13 through the speed reducer 4 This will cause the rolls to go 33 the clutch 7 be locked so that the clutch inside 29 ie the armature shaft 13 , held in the opposite direction before turning. This avoids the opposite rotation of the armature 9 ,

The coupling 7 is, as described above, with the closure member 36 equipped to leak the lubricant from inside the clutch 7 to the engine 2 minimize so that the stability of the idling and engaging the clutch 7 is ensured and further adhering the evaporated oil of the lubricant to the commutator 8th or the brushes 10 is avoided, resulting in a reduction in the service life of the brushes 10 leads.

The closure member 36 is in the clutch cover 35 around the armature shaft 13 is arranged, attached. The closure member 36 is, in other words, coaxial with the armature shaft 13 placed, creating the stability of a hermetic contact between the armature shaft 13 (ie the clutch interior 29 ) and the closing element 36 is ensured. Attaching the closure member 36 in the clutch cover 35 eliminates the need for additional parts that are required to the closure member 36 with the armature shaft 13 Coaxially restrain, so that a total generation cost of the starter 1 is minimized.

The clutch cover 35 is, as described above, to the outer projection 30b Press-fitted, leaving a space between the clutch cover 35 and the outer projection 30 is minimized to the leakage of the lubricant from the exterior of the clutch 7 to avoid.

The coupling 7 is designed so that the roles 33 idle or skid when the machine is started. It is therefore advisable to use grease in the clutch 7 is used, which has a lower coefficient of friction between the rollers 33 and the clutch interior 29 and between the roles 33 and the clutch exterior 30 having. The purpose of using the grease in the clutch 7 is identical to that of the grease in the speed reducer 4 , It is therefore allowed that the grease in the clutch 7 the same base oil (eg, an ester grease) as the same of the grease in the speed reducer 4 having. This allows the grease in the clutch 7 into the same in the speed reducer 4 is mixed, so the need for a closure, which is the coupling 7 from the speed reducer 4 hermetically separates, is eliminated. This leads to a simplified structure of the starter 1 and at a reduced generation cost thereof.

The closure member 36 is, as described above, made of a rubber whose outer periphery to the inner wall of the clutch cover 35 is fired and adheres to the same, whereby then a greater strength of a compound thereof, in particular in a circumferential direction of the closure member 36 , is ensured when the shutter member 36 to the clutch cover 35 Pressed or bonded or connected to the same.

The outer diameter of a section of the clutch interior 29 with which the closure member 36 placed in a hermetic contact is substantially identical to that of the remainder of the clutch interior 29 , The clutch inside 29 In other words, has an outer surface that is uniform in outer diameter, whereby the ease of machining the armature shaft 13 , with the clutch inside 29 is formed in one piece, is facilitated. This further facilitates the ease of attachment of the clutch 7 and the closure member 36 at an assembly of the Starters 1 ,

3 shows a permanent intervention starter 1 according to the second embodiment of the invention. The same reference numerals as used in the first embodiment refer to the same parts, and a detailed explanation thereof is omitted here.

The starter 1 has a second closure member 37 on, that on the clutch exterior 30a is arranged. The second closure member 37 is implemented, for example, by an O-ring made of rubber and between the periphery of the outer wall 30a and the end of the yoke 11 clamped. The second closure member 37 works to create a hermetic seal between the outer wall 30a and the yoke 11 to set up, eliminating the leak of the lubricant in the clutch 7 or the speed reducer 4 is used to the engine 2 through the outer periphery of the outer wall 30a is minimized to adhere the lubricant to the commutator 8th or the brushes 10 to avoid, resulting in a reduction in the service life of the brushes 10 leads.

4 shows a permanent intervention starter 1 according to the third embodiment of the invention. The same reference numerals as used in the first embodiment refer to the same parts, and a detailed explanation thereof is omitted here.

The clutch cover 35 is crimped or folded to form a hermetic connection with the outer periphery of the outer protrusion 30b to set up, creating a space between the outer projection 30b and the clutch cover 35 minimizes leakage of lubricant from the same into the clutch 7 to avoid. Other arrangements are identical to those in the first embodiment

5 is a vertical partial sectional view showing a modification of the coupling 7 that with the lock member 36 is equipped.

The closure member 36 is through an oil seal made of a metal ring 36a , synthetic rubber attached to the metal ring 36a burned or glued, and a spring 36c around the periphery of a closing lip 36b of the rubber is formed, implemented. The oil seal is in a cylindrical section 35a the clutch cover 35 Press fit and before turning relative to the clutch cover 35 retained. The sealing lip 36b is through the spring 36c in a constant abutment with the circumference of the clutch interior 29 driven to establish a hermetic seal in between. The oil seal is also equipped with a dust lip 36d equipped, which serves the penetration of dust into the clutch 7 to avoid.

6 represents a modification of the oil seal of 5 that is not with the spring 36c equipped. The oil seal of 6 has the metal ring 36a embedded in the synthetic rubber. The synthetic rubber is with the sealing lip 36b equipped.

7 represents a further modification of the oil seal of 5 that is not with the spring 36c equipped. The oil seal of 7 has a portion in the clutch cover 35 is to press and only through the metal ring 36a is formed. The sealing lip 36b is at the inner edge of the metal ring 36a burned or glued.

The use of the oil lock of the types described above facilitates the ease with which a change in the closure requirements arising, for example, from a change in the environmental condition in which the starter 1 is used, arises, can be countered. The oil lock of the type, as in one of the 5 to 7 is standardized in the JIS (Japanese Industrial Standards) and readily available, thus resulting in a reduction in the overall production cost of the starter 1 leads.

The oil seal, as with the starter 1 can be of a type different from the one used in 5 to 7 is differentiated.

Even though the present invention in terms of the preferred embodiments disclosed in order to facilitate a better understanding thereof, It is obvious that the invention in various ways accomplished may be without departing from the principle of the invention. The invention should therefore be understood to be all possible embodiments and modifications of the embodiments shown, the accomplished can be without departing from the principle of the invention as set forth in the appended claims is to deviate.

Claims (9)

A starter for a machine, comprising: an electric motor having an armature equipped with an armature shaft having an end to which a commutator is mounted in contact with brushes for supplying a starting current to the armature; an output shaft; a one - way clutch connected to the armature shaft of the Motor, wherein the one-way clutch operates to allow the armature shaft to rotate only in a normal direction; a speed reducer that operates to reduce a rotational speed of the armature shaft in the normal direction as transmitted through the one-way clutch to provide torque to the output shaft; a pinion that is in permanent engagement with a ring gear coupled to an engine, the pinion being provided to rotate together with the output shaft to transmit the torque of the output shaft to the ring gear for starting the engine ; a closure device mounted in the one-way clutch, the closure device operating to block leakage of the lubricant used in the one-way clutch toward the engine. A starter according to claim 1, wherein the one-way clutch a clutch inner, which is formed integrally with the armature shaft of the motor is a clutch exterior that too the clutch interior is arranged coaxially and before turning is held, and a coupling member between the clutch interior and the clutch exterior is, wherein the coupling member is designed to be a Außerineingriffnahme of the clutch interior from the clutch exterior to allow that the armature shaft rotates in the normal direction and around establish a firm engagement with the clutch interior and the clutch exterior, when the torque is opposite to the one-way clutch in one direction to the normal direction acts to transmit the torque to block the armature shaft. A starter according to claim 2, wherein the one-way clutch further comprising a clutch cover attached to the clutch outer and in which the closure device is a closure member which is arranged in the clutch cover to a hermetic seal between the clutch cover and the To develop armature shaft. A starter according to claim 3, wherein the closure member made of a rubber fired to the clutch cover is to make a connection between the closure member and the Set up clutch cover. A starter according to claim 3, wherein the closure member an oil lock is retained by the clutch cover from rotating is. A starter according to any one of claims 3 to 5, wherein a portion the interior of the coupling with which the closure member is placed in contact, essentially the same diameter as the same of a remainder having the clutch inside. A starter according to any one of claims 3 to 6, wherein the clutch cover to an outer periphery the clutch exterior press-fitted is. A starter according to any one of claims 2 to 7, further comprising second closure member having, on an outer periphery arranged the clutch exterior is to make a hermetic seal between the speed reducer and to set up the engine. Starter according to one of Claims 1 to 8, in which lubricant, used in the speed reducer and the one-way clutch are each made up of a grease, the base oil, a thickener and having an additive are prepared, wherein the greases in terms of the type of base oil are identical.