Novel planetary reduction starter

Abstract

The utility model discloses a novel planetary reduction starter, which relates to the technical field of starters, and is characterized in that radial positioning notches are arranged at the closing positions of a casing and a rear cover, and a bushing is assembled in the two radial positioning notches to radially position the casing and the rear cover so as to facilitate installation; meanwhile, an outgoing line of the commutator assembly can be led out through the wire protecting sleeve and connected with the electromagnetic switch so as to connect the commutator assembly and the electromagnetic switch. For an isolator assembly, the isolator assembly is a double-retainer-ring double-gear-sleeve planetary reduction isolator assembly, a first retainer ring gear sleeve mechanism and a second retainer ring gear sleeve mechanism are arranged to limit a driving gear and an isolator body correspondingly, the first retainer ring gear sleeve mechanism movably limits the driving gear to the front end of the isolator body, and when the driving gear makes contact with an engine flywheel, the driving gear is driven to move to the front end of the isolator body. The driving gear is movably assembled and can buffer for a certain distance, so that direct hard contact between the driving gear and the flywheel is avoided, and the service life of the driving gear is prolonged; the axial position of the isolator is limited by the second clamping ring stop sleeve mechanism, and the isolator is prevented from moving forwards excessively.

Description

Technical Field

[0001] The utility model relates to the technical field of starters, and more particularly to a novel planetary reduction starter. Background Art

[0002] A starter, also known as a motor, converts electrical energy into mechanical energy, driving the engine's flywheel to start the engine. Starters are categorized by their operating principle, including DC starters, gasoline starters, and compressed air starters. Internal combustion engines primarily use DC starters, characterized by their compact structure, simple operation, and ease of maintenance. DC starters are specifically designed for engine starting and require strong torque, drawing large currents of several hundred amperes.

[0003] Currently, automobile engines are started using external force, most commonly through a DC starter. In a DC starter, the armature rotates at a high speed, but its output torque is low. To increase the starter's output torque, a reduction mechanism is often connected to the armature's output end. This allows the starter to output higher torque, which is then transmitted to the planetary shaft, a one-way clutch, and a drive gear. The drive gear then drives the engine's flywheel.

[0004] Patent publication number CN218071243U discloses a novel permanent magnet DC starter with an electromagnetic switch, relating to the field of DC starter technology. The patent comprises a front cover, a one-way clutch assembly, a stator, an armature, a rear cover, an electromagnetic switch, and a shift fork. The front cover is provided with radial locating grooves for the ring gear, radial locating grooves for the stator, and assembly screw holes A. The one-way clutch assembly is provided with radial locating bosses A that mate with the radial locating grooves for the ring gear, and the stator is provided with radial locating bosses B that mate with the radial locating grooves for the stator. The armature is disposed within the stator and is transmission-connected to the one-way clutch assembly. The rear cover is disposed behind the stator and armature. The electromagnetic switch is secured via holes and bolts in the front cover. The shift fork's top end is connected to the electromagnetic switch, while its other end is connected to the one-way clutch assembly. This new invention utilizes locating bosses and holes in multiple components to save time during assembly. Furthermore, the electromagnetic switch used in the starter has a relatively simpler structure compared to previous starters.

[0005] The permanent magnet DC starter disclosed in the above patent has the following defects:

[0006] 1. The housing is provided with a brush holder assembly wire guard notch A, and the rear cover is provided with a brush holder assembly wire guard notch B. It does not disclose how to use the two brush holder assembly wire guard notches to radially position the housing and the rear cover.

[0007] 2. The one-way clutch body and its driving gear are an integrated structure. The integrated one-way clutch structure is difficult to process and manufacture. At the same time, when the integrated one-way clutch structure contacts the engine flywheel, there is no buffer and direct hard contact. Long-term use can easily damage the driving gear. Utility Model Content

[0008] In order to overcome the defects in the above-mentioned prior art, the purpose of the present invention is to provide a new planetary reduction starter to solve the problems in the above-mentioned prior art of how to radially position the casing and the rear cover and the problem of the integrated isolator structure.

[0009] In order to achieve the above objectives, the technical solution adopted by this utility model is:

[0010] A new type of planetary reduction starter, including a front cover, a check valve assembly, an electromagnetic switch, a fork, a stator, an armature, a commutator assembly, a rear cover and a wire protection sleeve;

[0011] The one-way device assembly is a double-clamp double-gear planetary reduction one-way device assembly and is assembled in the front end cover. The electromagnetic switch is assembled in the upper part of the front end cover and is drivingly connected to the one-way device assembly via a shift fork. The stator is located behind the one-way device assembly. The armature is assembled in the stator and is drivingly connected to the one-way device assembly. The rear end of the armature is inserted into the commutator assembly. The commutator assembly is located in the rear cover, and the rear cover is located behind the stator and the armature.

[0012] The stator comprises a casing, and radial positioning notches are provided at the places where the casing and the rear cover are close to each other. The wire guard is assembled in the two radial positioning notches to radially position the casing and the rear cover.

[0013] Preferably, the wire sheath is equipped with a commutator assembly lead wire, and the commutator assembly lead wire connects the commutator assembly and the electromagnetic switch.

[0014] Preferably, the front end cover is mounted on the engine through its foot plane and foot holes, and is fastened to the engine through its fasteners; the electromagnetic switch is fixed to the front end cover through screw holes and bolts, and a rubber gasket is assembled between the electromagnetic switch and the front end cover; the stator is excessively fitted with the front end cover stop through the outer circle of the casing, and a boss is provided on the casing to cooperate with the positioning notch on the front end cover for radial positioning.

[0015] Preferably, the one-way device assembly includes a one-way device, a planetary shaft, a planetary gear, a mounting frame assembly, a reduction gear ring, a first clamping ring and a second clamping ring and a second sleeve mechanism;

[0016] The one-way device is mounted on the planetary shaft and can slide axially relative to the planetary shaft. A horizontally penetrating planetary shaft hole is provided in the one-way device. The planetary shaft is mounted on the mounting frame assembly and passes through the planetary shaft hole. A plurality of planetary gears are provided and mounted on the rear end of the planetary shaft. The plurality of planetary gears are located in a reduction gear ring. The reduction gear ring is mounted on the mounting frame assembly and meshes with the plurality of planetary gears.

[0017] The one-way device includes a driving gear and a one-way device body. The driving gear is movably assembled at the front end of the one-way device body through the first clamping ring and gear sleeve mechanism; the second clamping ring and gear sleeve mechanism is assembled at the front end of the planetary shaft and is located in front of the one-way device to limit the axial position of the one-way device.

[0018] Preferably, the first collar and sleeve mechanism comprises a one-way device collar, a one-way device sleeve and a buffer spring;

[0019] The one-way device clamping ring is assembled on the outer side wall of the front end of the one-way device body and is located in front of the driving gear, and the one-way device gear sleeve is assembled on the one-way device clamping ring; the left side of the driving gear is against the one-way device gear sleeve, and a buffer cavity is provided on the inner side of the right part of the driving gear. The stepped sliding on the outside of the one-way device body is set in the buffer cavity, and the buffer spring is located in the buffer cavity and is against the stepped surface on the outside of the one-way device body.

[0020] Preferably, the second clamping ring and gear sleeve mechanism includes a planetary shaft clamping ring and a planetary shaft gear sleeve, the planetary shaft clamping ring is assembled on the outer side wall of the front end of the planetary shaft, and the planetary shaft gear sleeve is assembled on the planetary shaft clamping ring to limit the one-way device body from continuing to move leftward.

[0021] Preferably, a plug-in mounting piece is further provided on the right side of the isolator body, and a fork mounting area is provided on the plug-in mounting piece.

[0022] Preferably, the planetary shaft includes a shaft body, a shaft disc and a gear shaft; the shaft disc is located at the rear end of the shaft body, the gear shaft is provided with a plurality of and is assembled on the shaft disc, and the planetary gear is assembled on the gear shaft.

[0023] Preferably, a shaft clamping ring is installed on the shaft body, an adjustment pad is installed between the right side of the shaft clamping ring and the left side of the mounting frame assembly, and a friction-reducing pad is installed between the right side of the mounting frame assembly and the left side of the shaft disc.

[0024] Preferably, an annular latching tooth is provided on the right side of the mounting frame assembly, an annular latching groove is provided on the left side of the reduction gear ring, and the annular latching tooth is assembled on the annular latching groove.

[0025] Beneficial effects of the utility model:

[0026] The new planetary reduction starter provided by the utility model is provided with radial positioning notches at the places where the casing and the rear cover are close together. The wire guard is assembled in the two radial positioning notches to radially position the casing and the rear cover for easy installation; at the same time, the lead wire of the commutator assembly can be led out through the wire guard and connected to the electromagnetic switch, thereby connecting the two.

[0027] The new planetary reduction starter provided by the utility model is a double-clamping ring and double-gear sleeve planetary reduction one-way device assembly, which is provided with a first clamping ring and gear sleeve mechanism and a second clamping ring and gear sleeve mechanism to limit the driving gear and the one-way device body respectively. The first clamping ring and gear sleeve mechanism limits the driving gear to the front end of the one-way device body. When the driving gear contacts the engine flywheel, the driving gear is movably assembled to buffer a distance, thereby avoiding direct hard contact between the driving gear and the flywheel and extending its service life; the second clamping ring and gear sleeve mechanism limits the axial position of the one-way device to avoid its excessive forward movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the new planetary reduction starter of the utility model;

[0029] Figure 2 This is a schematic diagram of the rear cover of the utility model;

[0030] Figure 3 This is a schematic diagram of the wire protection sleeve of the utility model;

[0031] Figure 4 This is a schematic diagram of the one-way device assembly of the utility model;

[0032] Figure 5 This is a schematic diagram of the planetary shaft of the utility model;

[0033] Figure 6 This is a schematic diagram of the mounting bracket assembly of the utility model;

[0034] Figure 7 This is a schematic diagram of the reduction gear ring of the utility model;

[0035] Reference numerals:

[0036] 1. Front cover; 2. One-way device assembly; 21. One-way device; 211. Drive gear; 212. One-way device body; 213. Plug-in mounting member; 214. Fork mounting area; 22. Planetary shaft; 221. Shaft body; 222. Shaft disc; 223. Gear shaft; 23. Planetary gear; 24. Mounting frame assembly; 241. Annular gear; 25. Reduction gear ring; 251. Annular groove; 26. First clamping ring gear mechanism; 26 1. One-way clutch ring; 262. One-way clutch sleeve; 263. Buffer spring; 27. Second clutch ring and sleeve mechanism; 271. Planetary shaft clutch ring; 272. Planetary shaft sleeve; 28. Shaft clutch ring; 29. Adjustment pad; 210. Friction-reducing pad; 3. Electromagnetic switch; 4. Pull fork; 5. Stator; 51. Casing; 6. Armature; 7. Commutator assembly; 8. Rear cover; 9. Wire protection sleeve; 10. Commutator assembly lead wire; 11. Rubber pad. DETAILED DESCRIPTION

[0037] The following will provide a clear and complete description of the concept, specific structure and technical effects of the present invention in conjunction with the embodiments and drawings, so as to fully understand the purpose, features and effects of the present invention.

[0038] Example 1

[0039] A new type of planetary reduction starter, such as Figure 1-Figure 7 As shown, it includes a front cover 1, a isolator assembly 2, an electromagnetic switch 3, a shift fork 4, a stator 5, an armature 6, a commutator assembly 7, a rear cover 8 and a wire protection sleeve 9;

[0040] The one-way device assembly 2 is a double-collar, double-gear planetary reduction one-way device assembly and is assembled in the front cover 1. The electromagnetic switch 3 is assembled on the upper part of the front cover 1 and is drivingly connected to the one-way device assembly 2 through the shift fork 4. The stator 5 is located behind the one-way device assembly 2. The armature 6 is assembled in the stator 5 and is drivingly connected to the one-way device assembly 2. The rear end of the armature 6 is inserted into the commutator assembly 7. The commutator assembly 7 is located in the rear cover 8. The rear cover 8 is located behind the stator 5 and the armature 6.

[0041] The stator 5 includes a housing 51 . The housing 51 and the rear cover 8 are both provided with radial positioning notches. The wire protection sleeve 9 is assembled in the two radial positioning notches to radially position the housing 51 and the rear cover 8 .

[0042] like Figure 1 As shown, the commutator assembly lead wire 10 is assembled in the wire sheath 9 , and the commutator assembly lead wire 10 connects the commutator assembly 7 and the electromagnetic switch 3 .

[0043] In this embodiment, radial positioning notches are provided at the places where the casing 51 and the rear cover 8 are close together, and the wire sheath 9 is assembled in the two radial positioning notches to radially position the casing 51 and the rear cover 8 for easy installation; at the same time, the commutator assembly lead wire 10 can be led out through the wire sheath 9 and connected to the electromagnetic switch 3, thereby connecting the two.

[0044] The aforementioned new planetary reduction starter is a new type of electrical product, featuring a permanent magnet DC motor. Overall, it features a planetary reduction mechanism, with a key feature being its one-way clutch assembly, which differs from similar products in that it employs a dual-collar, two-speed sleeve design. This provides a high reduction ratio and high output torque. It is widely used in Ford vehicles and light trucks.

[0045] like Figure 1 As shown, the front end cover 1 is installed on the engine through its base plane and base holes, and is fastened to the engine through its fasteners; the electromagnetic switch 3 is fixed to the front end cover 1 through screw holes and bolts, and a rubber gasket 11 is assembled between the electromagnetic switch 3 and the front end cover 1; the stator 5 is excessively matched with the stop of the front end cover 1 through the outer circle of the housing 51, and a boss is provided on the housing 51 to cooperate with the positioning notch on the front end cover 1 for radial positioning.

[0046] In this embodiment, the front cover 1 plays a role in installation, support, and fixing in the entire structure. It is installed on the engine through its base plane and base holes and fastened to the engine through its fasteners. At the same time, the electromagnetic switch 3 is fixed to the front cover 1 through screw holes and bolts. The one-way device assembly 2 and the planetary shaft are also fixed to the front cover 1. The one-way device assembly 2 is assembled together with the front cover 1 stop and bearing chamber through its upper mounting bracket. The one-way device assembly 2 is radially fixed by the upper part of the mounting bracket being inserted into the front cover notch to prevent relative rotation between the one-way device assembly 2 and the front cover 1. The reduction gear ring is fixed to the one-way device assembly by the teeth on the gear ring positioning bracket on the mounting bracket matching the groove at the bottom of the reduction gear ring. The stator 5 is over-fitted with the front cover 1 stop through the outer circle of the housing 51. The radial positioning is radial positioning by matching the machined boss on the housing 51 with the positioning notch on the front cover 1. The commutator assembly 7 is secured to the rear cover 8 with screws. The radial position is determined by aligning the notch in the rear cover with the corresponding notch in the housing through the brush holder assembly lead wire guard. The rear and front covers are then fastened together with assembly bolts. The relative position of the carbon brushes and stator magnets on the commutator assembly 7 is determined by the relative position of the commutator assembly 7 on the rear cover.

[0047] Example 2

[0048] This embodiment is further described on the basis of embodiment 1. Figure 4-Figure 7 As shown, the isolator assembly 2 includes a isolator 21, a planetary shaft 22, a planetary gear 23, a mounting frame assembly 24, a reduction gear ring 25, a first clamping ring and a gear sleeve mechanism 26, and a second clamping ring and a gear sleeve mechanism 27;

[0049] The one-way device 21 is assembled on the planetary shaft 22 and can slide axially relative to the planetary shaft 22. A planetary shaft hole is provided in the one-way device 21. The planetary shaft 22 is assembled on the mounting frame assembly 24 and passes through the planetary shaft hole. A plurality of planetary gears 23 are provided and assembled on the rear end of the planetary shaft 22. The plurality of planetary gears 23 are located in a reduction gear ring 25. The reduction gear ring 25 is assembled on the mounting frame assembly 24 and meshes with the plurality of planetary gears 23.

[0050] The one-way device 21 includes a driving gear 211 and a one-way device body 212. The driving gear 211 is movably assembled at the front end of the one-way device body 212 through a first clamping ring and gear sleeve mechanism 26; the second clamping ring and gear sleeve mechanism 27 is assembled at the front end of the planetary shaft 22 and is located in front of the one-way device 21 to limit the axial position of the one-way device 21.

[0051] In this embodiment, a first clamping ring gear sleeve mechanism 26 and a second clamping ring gear sleeve mechanism 27 are provided to limit the driving gear 211 and the one-way device body 212 respectively. The first clamping ring gear sleeve mechanism 26 limits the driving gear 211 at the front end of the one-way device body 212. When the driving gear 211 contacts the flywheel, the driving gear 211 is movably assembled and can be buffered for a distance, thereby avoiding direct hard contact between the driving gear 211 and the flywheel and extending its service life; the second clamping ring gear sleeve mechanism 27 limits the axial position of the one-way device body 212 to prevent it from moving forward excessively.

[0052] Furthermore, in the prior art, to reduce direct, hard contact between the drive gear and the flywheel, a better material could be used to manufacture the drive gear. However, since the drive gear and the one-way clutch are an integrated structure, the one-way clutch is also made of the same material, resulting in higher costs. This embodiment adopts a split structure and provides a buffer distance, which reduces the material requirements for the drive gear, thereby reducing equipment costs.

[0053] In this embodiment, the entire structure is primarily supported by the mounting frame assembly 24 and the planetary shaft 22, which is secured to the starter via the starter front cover stator. Planetary gears 23 are mounted on the pins of the planetary shaft 22, with their external teeth meshing with the internal teeth of the reduction gear ring 25, which in turn meshes with the armature teeth of the armature.

[0054] like Figure 4 As shown, the first collar and sleeve mechanism 26 includes a isolator collar 261, a isolator sleeve 262 and a buffer spring 263;

[0055] The one-way device clamping ring 261 is assembled on the outer side wall of the front end of the one-way device body 212 and is located in front of the driving gear 211. The one-way device gear sleeve 262 is assembled on the one-way device clamping ring 261; the left side of the driving gear 211 is against the one-way device gear sleeve 262, and a buffer cavity is provided on the inner side of the right part of the driving gear 211. The stepped sliding on the outside of the one-way device body 212 is set in the buffer cavity. The buffer spring 263 is located in the buffer cavity and is against the stepped surface on the outside of the one-way device body 212.

[0056] In this embodiment, the one-way device retaining ring 261 and the one-way device gear sleeve 262 limit the driving gear 211 at the front end of the one-way device body 212; the buffer spring 263, the buffer cavity and the steps on the outside of the one-way device body 212 limit the driving gear 211 at the rear end of the one-way device body 212. At the same time, the driving gear 211 can be buffered for a distance, avoiding direct hard contact between the driving gear 211 and the flywheel.

[0057] In this embodiment, the drive gear 211 is connected to the one-way clutch body 212 via knurled linear keys on both sides. The drive gear is radially positioned on the one-way clutch body 212. The drive gear 211 is axially secured to the one-way clutch body 212 via a one-way clutch collar 261, a one-way clutch stop sleeve 262, and a buffer spring 263. The one-way clutch body 212 and the drive gear 211 are integrally connected. The front end of the planetary shaft 22 is fixed to the front cover using a hole-shaft mounting system, while the other end of the planetary shaft is fixed to the mounting bracket assembly 24.

[0058] like Figure 4 As shown, the second clamping ring and gear sleeve mechanism 27 includes a planetary shaft clamping ring 271 and a planetary shaft gear sleeve 272. The planetary shaft clamping ring 271 is assembled on the outer side wall of the front end of the planetary shaft 22, and the planetary shaft gear sleeve 272 is assembled on the planetary shaft clamping ring 271 to limit the one-way device body 212 from continuing to move to the left, that is, to limit the leftward movement of the one-way device body 212, thereby limiting the axial position of the one-way device and its front end.

[0059] like Figure 4 As shown, a plug-in mounting member 213 is further provided on the right side of the isolator body 212, and a fork mounting area 214 is provided on the plug-in mounting member 213. The fork is assembled in the fork mounting area 214, and the fork drives the isolator 21 to move left or right on the planetary shaft 22.

[0060] like Figure 5 As shown, the planetary shaft 22 includes a shaft body 221 , a shaft disc 222 and a gear shaft 223 ; the shaft disc 222 is located at the rear end of the shaft body 221 , a plurality of gear shafts 223 are provided and assembled on the shaft disc 222 , and the planetary gears 23 are assembled on the gear shaft 223 .

[0061] like Figure 4As shown, a shaft collar 28 is mounted on the shaft body 221. An adjustment washer 29 is mounted between the right side of the shaft collar 28 and the left side of the mounting bracket assembly 24. A friction-reducing pad 210 is mounted between the right side of the mounting bracket assembly 24 and the left side of the shaft disc 222. The shaft collar 28 is used to axially limit the position of the rear end of the isolator 21. The adjustment washer 29 is used to adjust the axial position of the reduction gear ring 25 on the planetary shaft 22. The friction-reducing pad 210 is used to reduce wear on the mounting bracket assembly 24.

[0062] like Figure 6 and 7 As shown, an annular latch 241 is provided on the right side of the mounting frame assembly 24, and an annular latch groove 251 is provided on the left side of the reduction gear ring 25, and the annular latch 241 is assembled on the annular latch groove 251. The reduction gear ring 25 and the mounting frame assembly 24 are fixed to the mounting frame assembly 24 through the teeth and grooves.

[0063] In order to better understand the present invention, the following is a complete description of the working principle of the present invention:

[0064] The power supply is introduced from the S terminal and B+ terminal of the electromagnetic switch. Although there is electricity at B+ at the beginning, the moving iron core does not move when the electromagnetic switch is not in operation, and the B+ and M terminals are disconnected from each other. Therefore, there is no current on M and the armature, and the armature will not move. However, after the S terminal is energized, the electromagnetic switch coil is energized, generating a magnetic field. The armature in the coil is magnetized, and a magnetic field is also generated. The directions of the two magnetic fluxes are always opposite. Under the action of the magnetic field force, the switch armature moves toward the B+ terminal of the switch, and the upper part of the switch fork is also dragged to move in the same direction. The switch uses the bottom surface of the front cover as a fulcrum to rotate as a lever, that is, the lower half of the fork rotates in the opposite direction to the upper half, that is, moves toward the engine, and pushes the one-way device to move toward the engine. After the driving teeth are engaged with the engine flywheel, the moving ring on the moving iron core contacts the B+ and M terminals at the same time, and the current is transmitted to the moving ring through the moving ring. M terminal, then to the positive carbon brush of the brush holder assembly, then to the armature commutator, then to the armature coil, then to the negative carbon brush of the brush holder assembly, then to the brush holder base plate, and then to the rear cover grounding to form a path. The current in the armature generates torque under the action of the stator magnetic field, which is transmitted to the planetary gear through the armature shaft teeth. The planetary gear rotates in a planetary circle along the inner teeth of the reduction gear ring, and drives the planetary shaft sleeved in the inner hole of the planetary gear to rotate. The planetary shaft transmits the torque to the one-way device through the spline engagement thereon. The one-way device transmits the torque to the mutually meshing drive teeth, and the drive teeth transmit the torque to the meshed flywheel, thereby realizing engine ignition and starting.

[0065] The above is a detailed description of the implementation methods of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalents or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A new type of planetary reduction starter, characterized in that: It includes a front cover (1), a one-way device assembly (2), an electromagnetic switch (3), a fork (4), a stator (5), an armature (6), a commutator assembly (7), a rear cover (8) and a wire protection sleeve (9); The one-way device assembly (2) is a double-ring double-speed sleeve planetary reduction one-way device assembly and is assembled in the front end cover (1). The electromagnetic switch (3) is assembled on the upper part of the front end cover (1) and is driven and connected to the one-way device assembly (2) through a fork (4). The stator (5) is located behind the one-way device assembly (2). The armature (6) is assembled in the stator (5) and is driven and connected to the one-way device assembly (2). The rear end of the armature (6) is inserted into the commutator assembly (7). The commutator assembly (7) is located in the rear cover (8). The rear cover (8) is located behind the stator (5) and the armature (6). The stator (5) includes a housing (51), and radial positioning notches are provided at the positions where the housing (51) and the rear cover (8) are close to each other. The wire protection sleeve (9) is assembled in the two radial positioning notches to radially position the housing (51) and the rear cover (8).

2. A novel planetary reduction starter as claimed in claim 1, characterized in that: A commutator assembly lead wire (10) is assembled in the wire protection sleeve (9), and the commutator assembly lead wire (10) is connected to the commutator assembly (7) and the electromagnetic switch (3).

3. A novel planetary reduction starter as claimed in claim 1, characterized in that: The front end cover (1) is mounted on the engine via its foot plane and foot holes; the electromagnetic switch (3) is fixed to the front end cover (1) via screw holes and bolts, and a rubber pad (11) is installed between the electromagnetic switch (3) and the front end cover (1); the stator (5) is excessively matched with the stopper of the front end cover (1) via the outer circle of the housing (51), and a boss is provided on the housing (51) to match the positioning notch on the front end cover (1) for radial positioning.

4. A novel planetary reduction starter as claimed in claim 1, characterized in that: The one-way device assembly (2) includes a one-way device (21), a planetary shaft (22), a planetary gear (23), a mounting frame assembly (24), a reduction gear ring (25), a first clamping ring and a gear sleeve mechanism (26), and a second clamping ring and a gear sleeve mechanism (27); The one-way device (21) is mounted on the planetary shaft (22) and can slide axially relative to the planetary shaft (22). A planetary shaft hole is provided in the one-way device (21). The planetary shaft (22) is mounted on the mounting frame assembly (24) and passes through the planetary shaft hole. A plurality of planetary gears (23) are provided and mounted on the rear end of the planetary shaft (22). The plurality of planetary gears (23) are located in a reduction gear ring (25). The reduction gear ring (25) is mounted on the mounting frame assembly (24) and meshes with the plurality of planetary gears (23). The one-way device (21) comprises a driving gear (211) and a one-way device body (212); the driving gear (211) is movably assembled at the front end of the one-way device body (212) via the first clamping ring and gear sleeve mechanism (26); the second clamping ring and gear sleeve mechanism (27) is assembled at the front end of the planetary shaft (22) and is located in front of the one-way device (21) to limit the axial position of the one-way device (21).

5. A novel planetary reduction starter as claimed in claim 4, characterized in that: The first clamping ring and gear sleeve mechanism (26) comprises a one-way device clamping ring (261), a one-way device gear sleeve (262), and a buffer spring (263); The one-way device clamping ring (261) is mounted on the front outer side wall of the one-way device body (212) and is located in front of the driving gear (211); the one-way device gear sleeve (262) is mounted on the one-way device clamping ring (261); the left side of the driving gear (211) is against the one-way device gear sleeve (262); a buffer cavity is provided on the inner side of the right part of the driving gear (211); the stepped sliding portion on the outer side of the one-way device body (212) is provided in the buffer cavity; the buffer spring (263) is located in the buffer cavity and is against the stepped surface on the outer side of the one-way device body (212).

6. A novel planetary reduction starter as claimed in claim 4, characterized in that: The second clamping ring and gear sleeve mechanism (27) comprises a planetary shaft clamping ring (271) and a planetary shaft gear sleeve (272), wherein the planetary shaft clamping ring (271) is mounted on the outer side wall of the front end of the planetary shaft (22), and the planetary shaft gear sleeve (272) is mounted on the planetary shaft clamping ring (271) to limit the one-way device body (212) from continuing to move leftward.

7. A novel planetary reduction starter as claimed in claim 4, characterized in that: A plug-in installation component (213) is further provided on the right side of the isolator body (212), and a fork installation area (214) is provided on the plug-in installation component (213).

8. A novel planetary reduction starter as claimed in claim 4, characterized in that: The planetary shaft (22) comprises a shaft body (221), a shaft disc (222) and a gear shaft (223); the shaft disc (222) is located at the rear end of the shaft body (221); the gear shaft (223) is provided with a plurality of gears and is assembled on the shaft disc (222); and the planetary gear (23) is assembled on the gear shaft (223).

9. A novel planetary reduction starter as claimed in claim 8, characterized in that: A shaft clamping ring (28) is mounted on the shaft body (221), an adjustment pad (29) is mounted between the right side of the shaft clamping ring (28) and the left side of the mounting frame assembly (24), and a friction-reducing pad (210) is mounted between the right side of the mounting frame assembly (24) and the left side of the shaft disc (222).

10. A novel planetary reduction starter as claimed in claim 4, characterized in that: An annular clamping tooth (241) is provided on the right side of the mounting frame assembly (24), an annular clamping groove (251) is provided on the left side of the reduction gear ring (25), and the annular clamping tooth (241) is assembled on the annular clamping groove (251).

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