Starter and isolator thereof

Abstract

The starter comprises the isolator, the isolator and a driving shaft of the starter are an integrated assembly part, the driving shaft is provided with a spiral spline part, a straight spline part and a limiting clamping groove, the spiral spline part is located in the middle of the driving shaft, and the straight spline part is located at the front end of the driving shaft. The limiting clamping groove is formed in the end, close to the straight spline part, of the spiral spline part. The isolator comprises a sliding seat, a spiral spline through hole and a gear shaft step mounting hole are coaxially formed in the sliding seat, a driving shaft penetrates through the spiral spline through hole, and a spiral spline part and the spiral spline through hole are connected through a spiral spline and slide relatively; the gear shaft is coaxially provided with an inner mounting blind hole, an inner straight spline is arranged in the inner mounting blind hole, the driving shaft is inserted into the inner mounting blind hole, and the straight spline part is meshed with the inner straight spline; the gear shaft is inserted into the gear shaft step mounting hole; and the elastic limiting structure is mounted in the limiting clamping groove.

Description

Technical Field

[0001] The utility model relates to a starter, in particular to a starter and a one-way device thereof. Background Art

[0002] The one-way brakes of starters in the prior art usually have two structures: rotating and striking (unequal number of splines) and rotating but not striking (equal number of splines). Among them, the one-way brake rotating and striking structure is a common structure, which is widely used and simple in structure. The common one-way brake-drive shaft structure that rotates and strikes contains a slide seat in the one-way brake assembly. The slide seat is a cup-shaped structure with a multi-petal special-shaped surface on the upper part and a spiral spline structure on the lower part; the drive shaft assembly is a rod-shaped structure with a partial spiral spline structure in its axial direction. The one-way brake assembly and the drive shaft assembly are connected by spiral splines, wherein the number of splines n of the one-way brake is generally 6-7 petals; the number of splines of the drive shaft is generally 2n (12-14 petals), and the actual number of effective working splines is only 6 or 7. The conventional assembly method of the existing structure is: first assemble the one-way brake assembly, and then screw the drive shaft assembly into the one-way brake assembly. The one-way brake assembly and the drive shaft assembly are independent of each other. Because of its spiral spline connection method, the n-petal splines in the slide are all load-bearing splines; there are 2n-petal splines on the drive shaft assembly, of which n-petal splines are load-bearing splines, and the remaining n-petal splines are installation splines. The load-bearing splines are the main load-bearing structure, with large loads and relative sliding, while the installation splines are only used for the assembly of the one-way device assembly and the drive shaft assembly and do not participate in load transfer. The axial overlap length of the slide splines and the drive shaft splines gradually increases from the static position to the driving position. During the driving process, the overlap length is too low, and once subjected to abnormal impact, it is easy to get stuck; the one-way device and the drive shaft are both in a hard limit relationship, and there is mechanical impact during operation.

[0003] During assembly, first align the bearing spline of the slide seat of the one-way device assembly with the installation spline of the drive shaft component, and screw it in axially to the limit bottom. At this time, the drive shaft spline and the slide seat spline can completely avoid each other axially, and there is an axial installation avoidance gap. After the drive shaft spline and the slide seat spline are screwed in axially and an axial installation avoidance gap is generated, keep the drive shaft stationary and rotate the one-way device assembly to a certain angle so that the "drive shaft installation spline-slide bearing spline" is changed to "drive shaft bearing spline-slide bearing spline"; then axially pull the "one-way device assembly-drive shaft assembly" apart, and after the drive shaft limit surface contacts the slide seat limit surface, the two are axially limited and fixed. The spline overlap length of this structure in the static state is less than the spline overlap length in the driven state, and the difference between the two is large. During the one-way device driving process, the drive shaft spline length gradually changes to the spline overlap length in the driven state.

[0004] There are three states when the starter's pinion engages with the engine flywheel: in state I, the flywheel is stationary, the pinion rotates and engages, the engagement spring is not compressed, the engagement is smooth, and the starter cranks the engine normally; in state II, the flywheel is stationary, the pinion rotates and engages, first the teeth are pressed, and then the engagement spring is compressed. The pinion rotates a certain angle and then engages, and the starter cranks the engine normally; in state III, the flywheel swings, the speed is not 0, the pinion rotates and engages, and the rotation speeds of the two may be opposite. At this time, violent tooth knocking occurs, and the pinion collides. The helical spline in the entire transmission system is not limited at this time, and high-load relative friction sliding will occur under impact, which will cause damage to the helical spline.

[0005] In summary, the existing structure mainly has the following problems:

[0006] 1) The axial overlap of the helical spline gradually increases from the static position to the driven position. The spline overlap in the static position is too low. During the driving process, if it is subjected to abnormal impact, the short axial overlap will cause some splines to fail prematurely.

[0007] 2) The one-way clutch's extended position is limited by hard contact between the six-petal spline bevel of the drive shaft and the spline bevel of the one-way clutch slide. In actual use, there is a large impact contact, which is prone to damage at the contact position, leading to limit failure, spline jamming, and ultimately starter failure;

[0008] 3) The helical spline has mechanical limits only at the initial and final resting positions. It cannot be limited during the relative movement of the helical spline. If an impact occurs during this process, high-load impact wear is likely to occur.

[0009] 4) There is a limit impact during the ejection process, which can easily cause damage to the starter's ejection mechanism. Utility Model Content

[0010] The technical problem to be solved by the present invention is to provide a starter and a one-way device thereof in view of the above-mentioned defects of the prior art.

[0011] In order to achieve the above-mentioned object, the present invention provides a one-way device installed on a starter, wherein the one-way device and the drive shaft of the starter are an integral assembly, and the drive shaft is provided with a helical spline portion, a straight spline portion and a limit slot, the helical spline portion is located in the middle of the drive shaft, the straight spline portion is located at the front end of the drive shaft, and the limit slot is provided at one end of the helical spline portion close to the straight spline portion; the one-way device comprises:

[0012] The sliding seat is coaxially provided with a helical spline through hole and a gear shaft step mounting hole, the drive shaft passes through the helical spline through hole, and the helical spline portion and the helical spline through hole are connected by a helical spline and slide relatively;

[0013] A gear shaft is coaxially provided with an inner mounting blind hole, wherein an inner straight spline is provided in the inner mounting blind hole, wherein the drive shaft is inserted into the inner mounting blind hole, and the straight spline portion is engaged with the inner straight spline; and the gear shaft is inserted into the gear shaft step mounting hole; and

[0014] The elastic limiting structure is installed in the limiting slot.

[0015] The above-mentioned one-way device, wherein the elastic limiting structure includes a retaining ring and a retaining ring, the retaining ring and the retaining ring are mounted on the drive shaft, the retaining ring is axially pressed into the limiting slot, and the limiting slot has an inclined surface on the side close to the retaining ring; there is an elastic limiting gap radially between the retaining ring and the retaining ring, and the retaining ring moves axially between the retaining ring and the inclined surface of the limiting slot.

[0016] The above-mentioned one-way device, wherein the overlapping length of the helical splines between the helical spline portion and the helical spline through hole in a static state is equal to the overlapping length of the helical splines in a driven state, and the overlapping length of the inner straight spline and the straight spline of the straight spline portion in a static state is greater than 3 mm and is less than the overlapping length of the helical spline between the helical spline portion and the helical spline through hole in a static state.

[0017] In the above-mentioned one-way device, a roller spring installation cavity is further provided in the slide seat, a roller is provided in the roller spring installation cavity, and the outer cylindrical surface of the gear shaft contacts the cylindrical surface of the roller.

[0018] In the above-mentioned one-way device, the roller spring installation cavity includes a plurality of special-shaped cavities, each of which is provided with a spring assembly, and the rollers are installed one-to-one corresponding to the spring assemblies.

[0019] In the above-mentioned one-way device, the ends of the inner straight spline of the gear shaft and the straight spline portion are respectively configured as inclined surfaces to ensure that the inner straight spline and the straight spline portion are re-engaged after being axially separated.

[0020] The above-mentioned one-way device, wherein the end face of the slide is further provided with a cover plate and a cover cap, the gear shaft passes through the central through hole of the cover plate, and the cover cap undergoes radial structural deformation through rolling riveting to ensure that the cover cap is stably connected to the slide seat.

[0021] In the above-mentioned one-way device, a buffer and anti-collision structure is further provided on the gear shaft, and the buffer and anti-collision structure is provided between the cover plate and the drive end cover of the starter.

[0022] In the above-mentioned one-way device, the buffer and anti-collision structure is a buffer spring, and the two ends of the buffer spring respectively abut against the cover plate and the driving end cover.

[0023] In order to better achieve the above-mentioned purpose, the present invention also provides a starter, which includes the above-mentioned one-way device.

[0024] The technical effects of the utility model are:

[0025] 1) The one-way device and the drive shaft no longer adopt a separate assembly structure, and there is no need for an assembly method of inserting and rotating. Instead, an integrated assembly structure is adopted;

[0026] 2) The effective working number of splines is increased, and the spline overlap in the static position is improved, ensuring that the spline overlap from the static position to the maximum extended position remains stable, that is, the spline overlap length in the static state is equal to the spline overlap length in the extended state, which can be within a relatively large safety value;

[0027] 3) The limiting structure of the one-way device and the drive shaft has been optimized to reduce the possibility of impact damage to components;

[0028] 4) A variety of spline matching methods are used in the matching of the one-way device and the drive shaft. Different spline load-bearing methods are achieved in the meshing stage through different axial matching lengths of the splines.

[0029] 5) A buffer and anti-collision structure is set at the front end of the one-way device to change the resultant force during the punching process and reduce the impact effect.

[0030] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the starter structure of an embodiment of the present utility model;

[0032] Figure 2 This is a schematic structural diagram of a one-way device according to an embodiment of the present invention;

[0033] Figure 3 A cross-sectional view of a one-way device according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the gear shaft structure of an embodiment of the present utility model;

[0035] Figure 5 This is a schematic diagram of the drive shaft structure of an embodiment of the present utility model;

[0036] Figure 6This is a schematic diagram of the position of the static limit structure of one embodiment of the utility model;

[0037] Figure 7 This is a schematic diagram of the position of the limiting structure in the ejection state of an embodiment of the present utility model;

[0038] Figure 8 This is a schematic diagram of the position of a one-way device in a static state according to an embodiment of the present invention;

[0039] Figure 9 This is a schematic diagram of the position of the one-way device in the limiting state according to one embodiment of the present invention.

[0040] Among them, the reference numerals

[0041] 1st stator

[0042] 2 armature

[0043] 3 drive shafts

[0044] 31 limit slots

[0045] 32 helical spline

[0046] 33 straight spline part

[0047] 4 small gears

[0048] 5. One-way device

[0049] 51 gear shaft

[0050] Blind hole installation in 511

[0051] 512 internal straight spline

[0052] 52 slide

[0053] 521 helical spline through hole

[0054] 522 gear shaft step mounting hole

[0055] 523 roller spring mounting cavity

[0056] 53 limiting structure

[0057] 531 retaining ring

[0058] 532 retaining ring

[0059] 533 elastic limit gap

[0060] 54 cover

[0061] 55 cover

[0062] 56 rollers

[0063] 57 spring

[0064] 58 spring support

[0065] 59 buffer anti-collision structure

[0066] 6 shift forks

[0067] 7. Electromagnetic switch

[0068] 8 drive end cover

[0069] Y1 drive shaft helical spline length

[0070] Y2 slide helical spline length

[0071] Y3 Helical spline overlap length in static state

[0072] Y4 Helical spline overlap length in the punched state DETAILED DESCRIPTION

[0073] The structural principle and working principle of the utility model are described in detail below with reference to the accompanying drawings:

[0074] See also Figure 1 , Figure 1 The diagram below is a schematic diagram of the starter structure according to one embodiment of the present invention. The starter comprises a stator 1, an armature 2, a drive shaft 3, a pinion 4, a non-return device 5, a shift fork 6, an electromagnetic switch 7, and an end cap 8. The non-return device 5 is integrally assembled with the drive shaft 3 and connected to the armature 2. The armature 2 is disposed within the stator 1, and the pinion 4 is mounted on a gear shaft 51 of the non-return device 5. The composition, structure, relative positional relationships, connections, and operating principles of the other components of the starter are well-established in the prior art and are therefore not described in detail here. The following describes only the non-return device 5 in detail.

[0075] See also Figure 2-Figure 5 , Figure 2 This is a structural diagram of a isolator 5 according to an embodiment of the present invention. Figure 3 This is a cross-sectional view of a isolator 5 according to an embodiment of the present invention. Figure 4 This is a schematic structural diagram of the gear shaft 51 according to an embodiment of the present invention. Figure 5This is a schematic diagram of the structure of the drive shaft 3 of an embodiment of the present invention. The one-way device 5 of the present invention is installed on the starter. The one-way device 5 and the drive shaft 3 are an integral assembly. The drive shaft 3 is provided with a helical spline portion 32, a straight spline portion 33 and a limit slot 31. The helical spline portion 32 is located in the middle of the drive shaft 3, the straight spline portion 33 is located at the front end of the drive shaft 3, and the limit slot 31 is provided at one end of the helical spline portion 32 close to the straight spline portion 33; the one-way device 5 includes: a slide 52, which is coaxially provided with a helical spline through hole 521 and a gear shaft step mounting hole 522, the drive shaft 3 passes through the helical spline through hole 521, and a screw is provided between the helical spline portion 32 and the helical spline through hole 521. The gear shaft 51 is coaxially provided with an inner mounting blind hole 511, and an inner straight spline 512 is provided in the inner mounting blind hole 511. The drive shaft 3 is inserted into the inner mounting blind hole 511, and the straight spline portion 33 meshes with the inner straight spline 512 provided in the inner mounting blind hole 511. The gear shaft 51 is inserted into the gear shaft step mounting hole 522. The inner straight spline 512 of the gear shaft 51 and the ends of the straight spline portion 33 are respectively provided with inclined surfaces to play a guiding role, ensuring that the inner straight spline 512 and the straight spline portion 33 are re-engaged after axial separation. An elastic limiting structure 53 is installed in the limiting slot 31. During the meshing process, a multi-stage different spline connection method is adopted, and the "elastic limit + spiral spline + buffer spring 57" structure is preferably used to reduce the top tooth ratio. At the same time, the straight spline is used to limit and protect the helical spline, which can effectively avoid damage to the helical spline caused by abnormal impact in the initial stage of the meshing process, and realize multi-stage variable spline connection in the meshing process.

[0076] See also Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the position of the static state limiting structure 53 of an embodiment of the present utility model. Figure 7The figure is a schematic diagram of the position of the ejection state limiting structure 53 of one embodiment of the present invention. The elastic limiting structure 53 of this embodiment includes a retaining ring 531 and a retaining ring 532. The retaining ring 531 and the retaining ring 532 are mounted on the drive shaft 3. The retaining ring 532 is axially pressed into the limiting slot 31. The limiting slot 31 has an inclined surface on the side close to the retaining ring 531. An elastic limiting gap 533 is radially defined between the retaining ring 531 and the retaining ring 532, and the retaining ring 531 moves axially between the retaining ring 532 and the inclined surface of the limiting slot 31. In the limiting structure 53 of the retaining ring 531 and the retaining ring 532, the limiting surface of the limiting slot 31 is preferably conical, the limiting surface of the retaining ring 531 is flat, and the retaining ring 532 can preferably be made of high-elasticity spring steel. When not in position, retaining ring 532 elastically contracts, remaining snug within retaining groove 31. During the ejection process, retaining ring 531 moves axially relative to drive shaft 3. During this movement, retaining ring 532, driven synchronously upward by its tapered surface structure, gradually increases in diameter to the position where it reaches the limit position, ultimately being firmly locked between retaining ring 531 and retaining groove 31. During this process, the deformation of retaining ring 532 acts as a flexible contact structure that absorbs shock, preventing impact on the limit surface.

[0077] See also Figure 8 and Figure 9 , Figure 8 This is a schematic diagram of the position of the isolator 5 in a static state according to an embodiment of the present invention. Figure 9 This is a schematic diagram of the position of the one-way device 5 in the limited state of an embodiment of the present utility model. In this embodiment, Y1 is the length of the helical spline of the drive shaft, Y2 is the length of the helical spline of the slide, Y3 is the overlap length of the helical spline in the static state, and Y4 is the overlap length of the helical spline in the driven state. The following relationship exists:

[0078] Y4=Y3=Y2<Y1, and Y3 is equal to Y4. During the driving process of the one-way device 5, the spline engagement length remains unchanged, that is, the helical spline overlap length Y3 between the helical spline portion 32 and the helical spline through-hole 521 in the static state is equal to the helical spline overlap length Y4 in the driven state. The overlap length of the inner straight spline 512 and the straight spline portion 33 in the static state is greater than 3 mm, and is less than the overlap length of the helical spline between the helical spline portion 32 and the helical spline through-hole 521 in the static state.

[0079] In the initial stage of engagement, the distance between the pinion 4 and the flywheel is A1>0. At this time, the compressible length of the gear engagement spring is C1, and the spring is not compressed. The straight spline engagement length B1>A1>0. In this state, the slide 52 of the one-way device 5 is connected to the drive shaft 3 using a helical spline, and the gear shaft 51 is connected to the drive shaft 3 via a helical spline. At this time, the one-way device 5 moves to the left relative to the drive shaft 3, and the drive shaft 3, the gear shaft 51, and the pinion 4 do not rotate circumferentially. The slide 52 rotates relative to the drive shaft 3 under the action of the helical spline and the axial driving force. In the state III stage, the distance between the pinion 4 and the flywheel is A1=0. At this time, the engagement spring can be compressed to a length C1, and the spring is not compressed. The straight spline engagement length B1 decreases, but B1>0. In this state, if an impact occurs, the drive gear-gear shaft 51-drive shaft 3 forms a rigid structure. The straight spline serves as the main load-carrying transmission structure, and the impact torque cannot cause the helical spline to slide relative to each other (the straight spline still functions at this time), thus protecting the rear end helical spline. In state II, the distance A1 between the pinion 4 and the flywheel is 0. At this time, the gear engagement spring's compressible length C1 begins to decrease, while the straight spline engagement length B1 decreases to 0. During this process, B1 is always < C1, that is, during the top tooth process, the straight spline is disconnected first. Only when the rear end helical spline is connected will the engagement spring's compressible length C1 be compressed to 0.

[0080] In this embodiment, the slide 52 is further provided with a roller spring mounting cavity 523. A roller 56 is disposed within the roller spring mounting cavity 523. The roller 56 is positioned between the gear shaft 51 and the slide 52, with the outer cylindrical surface of the gear shaft 51 contacting the cylindrical surface of the roller 56. The roller spring mounting cavity 523 includes multiple shaped cavities, each containing a spring assembly comprising a spring support 58 and a spring 57. The rollers 56 are mounted one-to-one with each spring assembly. The end surface of the slide 52 is further provided with a cover plate 55 and a cap 54. The gear shaft 51 passes through the central through-hole of the cover plate 55. The cap 54 undergoes radial structural deformation through a roll riveting process to ensure a stable connection between the cap 54 and the slide 52.

[0081] The gear shaft 51 of this embodiment may also be provided with a buffering and anti-collision structure 59, which is disposed between the cover plate 55 and the starter drive end cover 8. The buffering and anti-collision structure 59 is preferably a buffer spring, the two ends of which respectively abut against the cover plate 55 and the starter drive end cover 8.

[0082] During installation, the drive shaft 3 is passed through the helical spline through hole 521 of the slide 52, and the helical spline portion 32 of the drive shaft 3 and the helical spline through hole 521 are connected by a helical spline and slide relative to each other; after the helical spline portion 32 of the drive shaft 3 and the helical spline through hole 521 slide relative to each other for a set distance, the retaining ring 531 and the retaining ring 532 are successively mounted on the drive shaft 3 from the other end of the slide 52; a hydraulic press and corresponding tooling are used to press the retaining ring 532 axially into the limiting groove 31 of the drive shaft 3, and the retaining ring 531 is located between the retaining ring 532 and the slide 52, and can only move axially between the retaining ring 532 and the slide 52 to form an elastic limit; the spring 57 is installed on the spring support 58 to form a spring assembly, and then the spring assembly is successively installed into the roller spring mounting cavity 523 of the slide 52. In this embodiment, 6 special-shaped cavities are preferably provided, and the rollers are placed in sequence. 56, the number of rollers 56 corresponds to the spring assembly one by one; the gear shaft 51 is installed into the gear shaft step mounting hole 522 of the slide 52, the gear shaft 51 is kept coaxial with the drive shaft 3, the gear shaft 51 is kept coaxial with the gear shaft step mounting hole 522, the outer cylindrical surface of the gear shaft 51 contacts the cylindrical surface of the roller 56, and the inner straight spline 512 of the gear shaft 51 cooperates with the straight spline portion 33 of the drive shaft 3; the inclined surfaces at the ends of the two straight spline structures can ensure that the two can be axially engaged again after axial separation; grease is injected into the multiple special-shaped cavities respectively, the gear shaft 51 is passed through the central through hole of the cover plate 55, and the cover plate 55 is installed to fit the end face of the slide 52; finally, the cover 54 is stacked on the cover plate 55, and the cover 54 is subjected to radial structural deformation by rolling rivets to ensure that the cover 54 is stably connected to the slide 52 and does not separate from each other.

[0083] The one-way device 5 and the drive shaft 3 of the present invention no longer adopt a separate assembly structure, and do not need to be inserted and then rotated for assembly, but adopt an integrated assembly structure; a variety of spline matching methods are adopted in the matching of the one-way device 5 and the drive shaft 3. Through different axial matching lengths of the splines, different stages of corresponding load connection methods of different splines are adopted to achieve staged limit protection of the helical splines in the meshing stage, which can effectively reduce the high-load impact wear of the helical splines caused by impact during the driving process; the effective working logarithm of the splines is increased (increased by 1 times), and the spline overlap in the static position is increased, ensuring that the spline overlap from the static position to the maximum driving position is stable, that is, the spline overlap length Y3 in the static state is equal to the spline overlap length Y4 in the driving state, which can be within a larger safety value; the limiting method of the one-way device 5 and the drive shaft 3 is optimized, and an elastic limiting structure 53 of a retaining ring is adopted, and a buffering and anti-collision structure 59 is provided at the front end of the one-way device 5 to change the change of the driving force during the driving process, reduce the impact effect, and reduce the possibility of impact damage to components.

[0084] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A one-way device installed on a starter, characterized in that: The one-way device and the drive shaft of the starter are an integral assembly. The drive shaft is provided with a helical spline portion, a straight spline portion and a limit slot. The helical spline portion is located in the middle of the drive shaft, the straight spline portion is located at the front end of the drive shaft, and the limit slot is provided at one end of the helical spline portion close to the straight spline portion. The one-way device includes: The sliding seat is coaxially provided with a helical spline through hole and a gear shaft step mounting hole, the drive shaft passes through the helical spline through hole, and the helical spline portion and the helical spline through hole are connected by a helical spline and slide relatively; A gear shaft is coaxially provided with an inner mounting blind hole, wherein an inner straight spline is provided in the inner mounting blind hole, wherein the drive shaft is inserted into the inner mounting blind hole, and the straight spline portion is engaged with the inner straight spline; and the gear shaft is inserted into the gear shaft step mounting hole; and The elastic limiting structure is installed in the limiting slot.

2. The isolator according to claim 1, wherein: The elastic limiting structure includes a retaining ring and a retaining ring, which are mounted on the drive shaft. The retaining ring is axially pressed into the limiting slot, and the limiting slot has an inclined surface on the side close to the retaining ring; there is an elastic limiting gap radially between the retaining ring and the retaining ring, and the retaining ring moves axially between the retaining ring and the inclined surface of the limiting slot.

3. The isolator according to claim 1, wherein: The overlapping length of the helical splines between the helical spline portion and the helical spline through hole in a stationary state is equal to the overlapping length of the helical splines in a driven state, and the overlapping length of the inner straight spline and the straight spline portion in a stationary state is greater than 3 mm and is less than the overlapping length of the helical spline between the helical spline portion and the helical spline through hole in a stationary state.

4. The isolator according to claim 1, wherein: A roller spring installation cavity is further provided in the slide seat, a roller is provided in the roller spring installation cavity, and the outer cylindrical surface of the gear shaft contacts the cylindrical surface of the roller.

5. The isolator according to claim 4, characterized in that: The roller spring installation cavity includes a plurality of special-shaped cavities, each of which is provided with a spring assembly, and the rollers are installed one by one corresponding to the spring assemblies.

6. The isolator according to claim 1, wherein: The ends of the inner straight spline of the gear shaft and the straight spline portion are respectively arranged as inclined surfaces to ensure that the inner straight spline and the straight spline portion are meshed again after being axially separated.

7. The isolator according to claim 1, wherein: The end surface of the slide is further provided with a cover plate and a cover cap, the gear shaft passes through the central through hole of the cover plate, and the cover cap undergoes radial structural deformation through rolling riveting to ensure that the cover cap is stably connected to the slide.

8. The isolator according to claim 7, wherein: The gear shaft is also provided with a buffer and anti-collision structure, and the buffer and anti-collision structure is arranged between the cover plate and the driving end cover of the starter.

9. The isolator according to claim 8, characterized in that: The buffer and anti-collision structure is a buffer spring, and both ends of the buffer spring are respectively in contact with the cover plate and the driving end cover.

10. A starter, characterized in that: The isolator comprises the one-way device according to any one of claims 1 to 9.

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