CN212155562U - A one-way overrunning clutch - Google Patents

Abstract

A one-way overrunning clutch, comprising an outer ring gear and a central member that are coaxially installed between a driving gear of an automobile engine and an armature shaft, one end of a spring is fixedly connected to the outer ring gear, and the other end of the spring responds to the elastic force The front end of the member is connected, the middle position of the pawl is rotatably connected with the outer ring gear, and the tail end of the elastic response member is connected with the central member; in the natural state of the spring, the central member is connected with the elastic response member, and the rotation of the central member drives the The elastic force responds to the movement of the member, which in turn drives the rotation of the outer ring gear. At this time, it is in a locked state; when the rotation speed of the outer ring gear is greater than that of the central member, the spring will shrink under the action of inertial force, driving the elastic response member and the central member. Separated, the central member and the outer ring gear move separately, and the separated state prevents the motor from overspeeding; the utility model has the advantages of simple structure, fast response speed, long service life, good effect and strong practicability.

Description

A one-way overrunning clutch

technical field

The utility model relates to an automobile clutch, in particular to a one-way overrunning clutch.

Background technique

The transmission mechanism of the starter is installed on the extension shaft of the motor armature, which is used to connect the drive gear and the armature shaft into one body when starting the engine, and move the drive gear along the armature shaft to mesh with the ring teeth of the flywheel. The electromagnetic torque generated by the engine is transmitted to the crankshaft of the engine to start the engine; after the engine is started, when the speed of the drive gear exceeds the speed of the armature shaft, the transmission mechanism automatically disengages the drive gear from the armature shaft to prevent the motor from overspeeding. The transmission mechanism of the starter must have overspeed protection devices, such as one-way roller clutches, spring one-way clutches, and friction disc clutches; the traditional one-way roller clutches are separated by changing the position of the rollers in the wedge grooves. And combined, the wear between the roller and the inner ring is large. When the speed of the outer ring is large, the roller is not easy to enter the wide end from the narrow end under the action of the spring, and the response speed is slow.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a one-way overrunning clutch, which can connect the drive gear and the armature shaft into one body when the starter switch is turned on to start the engine, so that the electromagnetic The torque is transmitted to the crankshaft of the engine through the drive gear and the flywheel, and the engine is started. After the engine starts, the drive gear is immediately disengaged from the armature shaft to prevent the torque from the high-speed rotation of the engine from being transmitted to the armature shaft through the flywheel to protect against overspeed. It has the advantages of simple structure, fast response speed, long service life, good effect and strong practicability.

In order to achieve the above purpose, the utility model adopts the technical scheme as follows:

A one-way overrunning clutch, comprising an outer ring gear 1 and a central member that are coaxially installed between a driving gear of an automobile engine and an armature shaft, one end of a spring 3 is fixedly connected to the outer ring gear 1, and the other end of the spring 3 is fixedly connected. One end is connected with the front end of the elastic response member, the middle position of the elastic response member is rotatably connected with the outer ring gear 1, and the rear end of the elastic response member is connected with the central member.

Holes 5 are evenly distributed on the outer ring gear 1 .

The central member is an inner ring gear 2-1 or a ratchet 2-2.

The elastic response member is an inclined block 4-1 or a pawl 4-2.

The upper and lower edges of the inclined block 4-1 are in contact with the inner ring gear 2-1 and the outer ring gear 1 respectively.

The rear end of the ratchet 4-2 is engaged with the ratchet 2-2.

The rotatable connection is a pin connection or a bolt connection.

The beneficial effects of the present utility model are:

1. The upper and lower edges of the rear end of the oblique block 4-1 are in contact with the inner ring gear 2-1 and the outer ring gear 1 respectively. Under the action of friction and spring force, the inner ring gear 2-1 and the outer ring gear 1 are connected. Synchronized motion and individual motion.

2. Each surface of the pawl 4-2 and the ratchet wheel 2-2 can be contacted to realize the function of separation and combination, which significantly reduces the wear between parts; the ratchet wheel 2-2 and the pawl 4 are realized by the elastic force generated by the spring 3 -2 separation.

3. The uniform opening of the outer ring gear can reduce the quality of the gear and reduce the moment of inertia of the gear during operation.

The above-mentioned structure realizes the function of overspeed protection, and has the advantages of simple structure, fast response speed, long service life, good effect and strong practicability.

Description of drawings

FIG. 1 is a schematic structural diagram of the locked state of the inclined block 4-1 and the inner ring gear 2-1 of the present invention.

FIG. 2 is a schematic structural diagram of the present utility model in a state where the oblique block 4-1 is separated from the inner ring gear 2-1.

3 is a schematic structural diagram of the locking state of the ratchet wheel 2-2 and the ratchet pawl 4-2 of the present invention.

4 is a schematic structural diagram of the ratchet wheel 2-2 and the ratchet pawl 4-2 of the present invention in a separated state.

In the picture: 1, outer ring gear; 2-1, inner ring gear; 2-2, ratchet; 3, spring; 4-1, oblique block; 4-2, pawl; 5, opening.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings.

Referring to FIGS. 1 to 4 , a one-way overrunning clutch includes an outer ring gear 1 and a central member coaxially installed between the driving gear of an automobile engine and the armature shaft, and a spring 3 is fixedly connected to the outer ring gear 1 The other end of the spring 3 is connected with the front end of the elastic response member, the middle position of the elastic response member is rotatably connected with the outer ring gear 1, and the tail end of the elastic response member is connected with the central member.

Holes 5 are evenly distributed on the outer ring gear 1 .

The central member is an inner ring gear 2-1 or a ratchet 2-2.

The elastic response member is an inclined block 4-1 or a pawl 4-2.

The upper and lower edges of the inclined block 4-1 are in contact with the inner ring gear 2-1 and the outer ring gear 1 respectively.

The rear end of the ratchet 4-2 is engaged with the ratchet 2-2.

The rotatable connection is a pin connection or a bolt connection.

The rotation direction of the clutch is the rotation direction driven by the electromagnetic torque of the starter.

The working principle of the utility model is:

In the natural state of the spring 3, the oblique block 4-1, the inner ring gear 2-1 and the outer ring gear 1 are in a locked state, and the upper and lower edges of the rear end of the oblique block 4-1 are in the outer ring gear 1 and the inner ring gear 2-1. Contact connection, under the action of friction, the rotation of the inner ring 2-1 drives the movement of the inclined block 4-1, which in turn drives the rotation of the outer ring gear 1; when the rotation speed of the outer ring gear 1 is greater than that of the inner ring gear 2-1, the spring 3 Under the action of inertial force, it will shrink, driving the front end of the oblique block 4-1 to move downward and separate from the inner ring gear 2-1, and the inner ring gear 2-1 and the outer ring gear 1 move respectively. At this time, the inner ring gear 2 -1 and the inclined block 4-1 are separated to prevent the motor from overspeeding.

In the natural state of the spring 3, the ratchet wheel 2-2 meshes with the pawl 4-2. The rotation of the ratchet wheel 2-2 drives the movement of the pawl 4-2, which in turn drives the rotation of the outer ring gear 1. At this time, the ratchet wheel 2-2 and The pawl 4-2 is in a locked state; when the speed of the outer ring gear 1 is greater than the ratchet wheel 2-2, the spring 3 will shrink under the action of inertial force, driving the pawl 4-2 to separate from the ratchet wheel 2-2, and the ratchet wheel 2-2 and the outer ring gear 1 move respectively. At this time, the ratchet wheel 2-2 and the pawl 4-2 are separated to prevent the motor from overspeeding.

The above embodiments are only used to illustrate the present utility model, but not to limit the present utility model. Those of ordinary skill in this technical field can also make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims (7)

1. The one-way overrunning clutch comprises an outer ring gear (1) and a central component, wherein the outer ring gear (1) and the central component are coaxially installed between a driving gear and an armature shaft of an automobile engine, one end of a spring (3) is fixedly connected to the outer ring gear (1), the other end of the spring (3) is connected with the front end of an elastic response component, the middle position of the elastic response component is rotatably connected with the outer ring gear (1), and the tail end of the elastic response component is connected with the central component.

2. A one-way overrunning clutch according to claim 1, wherein: and the outer ring gear (1) is uniformly provided with holes (5).

3. A one-way overrunning clutch according to claim 1, wherein: the central component is an inner ring gear (2-1) or a ratchet wheel (2-2).

4. A one-way overrunning clutch according to claim 1, wherein: the elastic force response component is an inclined block (4-1) or a pawl (4-2).

5. The one-way overrunning clutch of claim 4, wherein: the upper edge and the lower edge of the inclined block (4-1) are respectively in contact connection with the inner ring gear (2-1) and the outer ring gear (1).

6. The one-way overrunning clutch of claim 4, wherein: the tail end of the pawl (4-2) is meshed with the ratchet wheel (2-2).

7. A one-way overrunning clutch according to claim 1, wherein: the rotatable connection is a pin connection or a bolt connection.

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