CN211370599U

CN211370599U - Starting motor isolator

Info

Publication number: CN211370599U
Application number: CN201922358470.6U
Authority: CN
Inventors: 李波; 彭志宏; 赖添华
Original assignee: Guangdong Jingde Electric Machinery Co ltd
Current assignee: Guangdong Jingde Electric Machinery Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-08-28
Anticipated expiration: 2029-12-25

Abstract

The utility model relates to a starter accessory equipment technical field specifically is a starting motor isolator, including isolator shell and connecting axle, isolator shell inner wall one end is equipped with the teeth of a cogwheel, the teeth of a cogwheel of isolator shell and the teeth of a cogwheel meshing of reduction gear, the isolator shell with cavity between the connecting axle is provided with the holder, the holder is fixed with the rotatable voussoir of a plurality of along circumference. The utility model discloses an isolator structural design passes through splined connection with the output shaft between reduction gear and shift fork, the connecting axle of isolator, therefore the shift fork only need overcome the resistance that output shaft and drive gear's weight produced, and the magnetic force that electromagnetic switch needs reduces, can reduce the use amount of electromagnetic switch coil or iron core to practice thrift the cost.

Description

Starting motor isolator

Technical Field

The utility model relates to a starter accessory equipment technical field specifically is a starting motor isolator.

Background

The engine of the motor vehicle is started by means of a starter. The transmission device between the engine and the starter, namely the flywheel gear ring and the one-way clutch, enables the gear of the starter to be meshed with the flywheel gear ring of the engine through the shifting fork, and transmits the starting torque to the crankshaft to drive the engine to enter a working state. After the engine is started, the starter can be automatically separated from the engine due to the action of the one-way clutch, and the armature of the starter is prevented from flying due to the high-speed rotation of the engine flywheel. In short, the one-way clutch functions to transmit torque and protect the starter armature.

The one-way clutch is usually designed between a shifting fork and a driving gear, the shifting fork needs to overcome the extra resistance generated by the weight of the one-way clutch, and therefore the electromagnetic switch also needs to provide larger magnetic force, so that the usage amount of a coil or an iron core of the electromagnetic switch is increased, and the manufacturing cost is increased.

SUMMERY OF THE UTILITY MODEL

The starting motor isolator comprises an isolator shell and a connecting shaft, wherein one end of the inner wall of the isolator shell is provided with gear teeth, the gear teeth of the isolator shell are meshed with the gear teeth of a speed reducer, a retainer is arranged in a cavity between the isolator shell and the connecting shaft, and a plurality of rotatable wedge blocks are fixed on the retainer along the circumferential direction.

Preferably, one end of the connecting shaft is a two-stage step optical axis, the other end of the connecting shaft is a spline shaft, and the spline shaft of the connecting shaft is connected with a spline groove of the output shaft.

Preferably, the reduction gear includes the planet carrier, the planet carrier outer wall is equipped with the teeth of a cogwheel, the teeth of a cogwheel of planet carrier and the teeth of a cogwheel meshing of isolator shell, the inside of planet carrier is equipped with the hole, the hole of planet carrier and the left end ladder optical axis registrate of connecting axle.

Preferably, one end of the wedge block is in contact with the inner wall of the isolator shell, and the other end of the wedge block is in contact with a right-end stepped optical axis of the connecting shaft.

Preferably, both ends of the wedge block are provided with through grooves, and an annular spring is assembled in the groove of the wedge block.

Compared with the prior art, the utility model discloses the beneficial effect who reaches is:

the isolator structural design passes through splined connection between reduction gear and shift fork, and the connecting axle of isolator passes through splined connection with the output shaft, therefore the shift fork only need overcome the resistance that the weight of output shaft and drive gear produced, and the magnetic force that electromagnetic switch needs reduces, can reduce the use amount of electromagnetic switch coil or iron core to practice thrift the cost.

Drawings

Fig. 1 is a perspective view of the present invention;

fig. 2 is a schematic structural diagram of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

the figures are labeled as follows:

1-speed reducer, 11-sun gear, 12-planet gear, 13-planet carrier, 14-external gear ring, 2-isolator, 21-isolator shell, 22-connecting shaft, 23-retainer, 24-wedge block, 241-a point, 242-b point, 243-c point, 244-d point, 25-annular spring, 3-output shaft, 31-spline groove, 4-shifting fork, 5-thrust disc and 6-driving gear.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 and 3, the starter motor isolator comprises an isolator shell 21 and a connecting shaft 22, wherein gear teeth are arranged at one end of the inner wall of the isolator shell 21, the gear teeth of the isolator shell 21 are meshed with the gear teeth of the speed reducer 1, a retainer 23 is arranged in a cavity between the isolator shell 21 and the connecting shaft 22, and a plurality of rotatable wedges 24 are fixed on the retainer 23 along the circumferential direction.

Preferably, one end of the connecting shaft 22 is a two-stage stepped optical axis, the other end of the connecting shaft 22 is a spline shaft, and the spline shaft of the connecting shaft 22 is connected with the spline groove 31 of the output shaft 3.

Preferably, reduction gear 1 includes planet carrier 13, planet carrier 13 outer wall is equipped with the teeth of a cogwheel, the teeth of a cogwheel of planet carrier 13 and the meshing of the teeth of a cogwheel of isolator shell 21, planet carrier 13's inside is equipped with the hole, planet carrier 13's hole and the left end ladder optical axis registrate of connecting axle 22, planet carrier 13's hole and the left end ladder optical axis's of connecting axle 22 cooperation relation are clearance fit, and planet carrier 13's hole plays the effect of supporting connecting axle 22, guarantees the teeth of a cogwheel of isolator shell 21 and the teeth of a cogwheel of planet carrier 13 right meshing simultaneously.

Preferably, one end of the wedge 24 is in contact with the inner wall of the isolator housing 21, and the other end of the wedge 24 is in contact with a right stepped optical axis of the connecting shaft 22.

Preferably, the wedge 24 is provided with a through groove at both ends, and the groove of the wedge 24 is provided with an annular spring 25, and the annular spring 25 is used for ensuring the consistency and synchronism of the wedge 24.

The working principle is as follows: after the starter is powered on, the electromagnetic switch generates magnetic force, the movable iron core moves to pull the shifting fork 4, the shifting fork 4 shifts the thrust plate 5 to push the output shaft 3 to the flywheel, a motor of the starter starts to work, a torque is input to the sun gear 11 by an armature shaft of the starter, the planet gear 12 is assembled on the planet carrier 13 and rotates around a support shaft of the planet carrier 13, the sun gear 11 is meshed with the planet gear 12, the outer gear ring 14 is fixed on a shell of the starter, the torque is output to the planet carrier 13, and gear teeth of the planet carrier 13 are meshed with gear teeth of the isolator shell 21 to transmit.

The inner and outer cam surfaces of the wedge 24 are eccentric arc surfaces, the distance from the point a 241 to the point c 243 is the minimum distance for the wedge 24 to rotate to a specific angle, and the distance from the point b 242 to the point d 244 is the maximum distance for the wedge 24 to rotate to a specific angle. When the isolator housing 21 rotates in the locking direction, the wedge block 24 rotates clockwise around its own center, and since the distance from the point b 242 to the point d 244 of the wedge block 24 is greater than the gap between the isolator housing 21 and the connecting shaft 22, the wedge block 24 is wedged tightly between the isolator housing 21 and the connecting shaft 22 to transmit torque to the output shaft 3 in spline fit with the connecting shaft 22, and the driving gear 6 on the output shaft 3 engages with the engine flywheel to drive the engine to start. When the flywheel rotates at a speed higher than that of the output shaft 3 and the isolator housing 21 rotates in the opposite direction to the locking direction after the engine operates normally, the wedge 24 rotates counterclockwise around its center, and the isolator housing 21 is disengaged from the connecting shaft 22 and torque cannot be transmitted because the distance from the point a 241 to the point c 243 of the wedge 24 is smaller than the gap between the isolator housing 21 and the connecting shaft 22.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The starting motor isolator is characterized by comprising an isolator shell and a connecting shaft, wherein one end of the inner wall of the isolator shell is provided with gear teeth, the gear teeth of the isolator shell are meshed with the gear teeth of a speed reducer, a retainer is arranged in a cavity between the isolator shell and the connecting shaft, and a plurality of rotatable wedge blocks are fixed on the retainer along the circumferential direction.

2. The starter motor isolator as claimed in claim 1, wherein one end of the connecting shaft is a two-stage stepped optical axis, and the other end of the connecting shaft is a spline shaft, and the spline shaft of the connecting shaft is connected with the spline groove of the output shaft.

3. The starter motor isolator according to claim 2, wherein the speed reducer comprises a planet carrier, gear teeth are arranged on the outer wall of the planet carrier, the gear teeth of the planet carrier are meshed with the gear teeth of the isolator shell, a hole is formed in the planet carrier, and the hole of the planet carrier is sleeved with the left-end stepped optical axis of the connecting shaft.

4. The starter motor isolator as claimed in claim 1, wherein one end of the wedge is in contact with an inner wall of the isolator case, and the other end of the wedge is in contact with a right stepped optical axis of the connecting shaft.

5. The starter motor isolator as claimed in claim 1, wherein the wedge is provided with a groove extending therethrough at both ends thereof, and the groove of the wedge is fitted with a ring spring.