CN212080126U - Parking mechanism and transmission - Google Patents

Abstract

The utility model relates to an automotive transmission technical field especially relates to a parking mechanism and derailleur, including parking direction subassembly, ratchet and be used for realizing the pawl of parking action with the ratchet cooperation, parking direction subassembly includes the driving piece and is used for contacting and promoting the guide that the pawl removed with the pawl, and the driving piece is offered and is used for the shaft hole of being connected through transmission shaft and parking drive unit's output transmission, and the guide rotates to be connected in the axis rotation in driving piece duplex winding shaft hole. The utility model discloses simple structure helps reducing the wearing and tearing of pawl and parking direction subassembly, improves the life and the driven efficiency of pawl and parking direction subassembly to reduce powder and piece that parking direction subassembly and pawl friction produced, improved the cleanliness in the derailleur.

Description

Parking mechanism and transmission

technical field

The utility model relates to the technical field of automobile transmissions, in particular to a parking mechanism and a transmission.

Background technique

The realization forms of the parking mechanism in the prior art can only be divided into two categories: a cam-type parking mechanism and a taper-pin tie-rod-type parking mechanism. The design of the parking mechanism needs to achieve four goals: 1. Reliable parking function 2. Appropriate shifting force 3. Safe parking speed 4. Parking moving distance that meets legal requirements.

In the taper pin pull rod type parking mechanism currently used in the market, the process of realizing the parking function of the pawl is realized by pressing the pawl downward through the movement of the taper pin. During the movement of the taper pin, the taper pin Due to the relative sliding between the pawl and the pawl, a large sliding friction force will be generated, which will cause large wear on the taper pin and the pawl. Therefore, in order to ensure the functionality and safety, the materials and processing of the pawl and the taper pin are relatively high, so a large processing cost will be incurred.

Utility model content

The purpose of the present utility model is to provide a parking mechanism and a transmission that reduce the wear caused by the sliding contact between the components that drive the pawl to move and the pawl, and increase the service life.

In order to achieve the above purpose, the present invention provides a parking mechanism, which includes a parking guide assembly, a ratchet, and a pawl for cooperating with the ratchet to realize a parking action, the parking guide assembly is arranged on the back of the pawl One side of the ratchet wheel; the parking guide assembly includes a driving part and a guiding part for contacting with the pawl and pushing the pawl to move, the driving part is provided with a transmission connection with the output end of the parking drive unit through the transmission shaft The guide member is rotatably connected to the drive member and can rotate around the axis of the shaft hole.

Optionally, the shaft hole is eccentrically arranged in the driving member, and the guide member is sleeved on the outer periphery of the driving member and is rotatably connected with the driving member.

Optionally, there is a gap between the inner side surface of the guide member and the outer side surface of the driving member, and the gap is provided with a rolling component for generating rolling friction when the inner side surface of the guide member and the outer side surface of the driving member rotate relative to each other.

Optionally, the rolling assembly includes a plurality of bearing needle rollers arranged along the circumferential direction of the inner ring of the guide member.

Optionally, the inner side wall of the shaft hole is provided with a keyway for connecting with the transmission shaft.

Optionally, the guide member and the driving member are arranged coaxially.

Another object of the present invention is to provide a transmission including the above parking mechanism.

Implementing the embodiment of the present utility model has the following technical effects:

In the utility model, when the drive shaft drives the drive member to rotate, the drive member drives the guide member to rotate around the axis of the shaft hole, so as to push the pawl to cooperate with the ratchet to realize the parking action. It can rotate relative to the driving part around the axis of the shaft hole, and the outer side of the guide part contacts with the side of the pawl facing away from the ratchet wheel and moves relatively. At this time, the guide part rotates and converts the sliding friction with the pawl into rolling friction, thereby reducing the Wear between pawls and park guide assemblies, optimizing automotive NVH performance and extending component life.

In addition, since the guide part contacts the pawl and pushes the pawl to move, it generates rolling friction with the pawl, and the relative sliding friction reduces the wear of the pawl and the guide part, thereby reducing the powder and debris generated by the damage of the guide part and the pawl. , which improves the cleanliness inside the transmission.

Description of drawings

Fig. 1 is the structural representation of the preferred embodiment of the present utility model;

FIG. 2 is a schematic structural diagram of a parking guide assembly according to a preferred embodiment of the present invention.

Description of reference numbers:

1. Parking guide assembly, 11, drive member, 111, shaft hole, 112, keyway, 12, guide member, 13, rolling assembly, 2, pawl, 3, ratchet.

Detailed ways

The specific embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the It is described, rather than indicated or implied, that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

Referring to FIGS. 1 and 2 , this embodiment provides a parking mechanism, including a parking guide assembly 1 , a ratchet 3 and a pawl 2 for cooperating with the ratchet 3 to realize a parking action. One end is hinged, and the other end is a free end. The opposite side of the pawl 2 and the ratchet wheel 3 is provided with a tooth portion that engages with the ratchet wheel 3; The guide member 12 for the movement of the pawl 2, the driving member 11 is provided with a shaft hole 111 for drivingly connecting with the output end of the parking drive unit through the transmission shaft, and the outer side of the guide member 12 abuts on the side of the pawl 2 facing away from the ratchet wheel 3 , the guide member 12 is rotatably connected to the driving member 11 and can rotate around the axis of the shaft hole 111 . In the present invention, when the drive shaft drives the drive member 11 to rotate, the drive member 11 drives the guide member 12 to rotate around the axis of the shaft hole 111 , so that the guide member 12 contacts with the pawl 2 and pushes the pawl 2 to move, and the pawl 2 is inserted into the ratchet wheel 3 slot, in addition, when the guide member 12 pushes the pawl 2 to move, the guide member 12 can rotate relative to the driving member 11 around the axis of the shaft hole 111. One side contacts and moves relatively, at this time the guide 12 rotates and converts the sliding friction with the pawl 2 into rolling friction, thereby reducing the wear between the pawl 2 and the parking guide assembly 1, optimizing the NVH performance of the vehicle and extending the service life of components.

In addition, since the friction between the pawl 2 and the parking guide assembly 1 is reduced, the requirements for the anti-wear properties of the materials for manufacturing the pawl 2 and the parking guide assembly 1 are reduced, which helps to reduce the manufacturing cost and processing of the transmission cost.

Further, in this embodiment, structural improvement of the ratchet 2 is not required, so as to ensure the integral integrity of the ratchet 2 and help to ensure the structural strength of the ratchet 2 .

Referring to FIG. 2 , the shaft hole 111 in this embodiment is eccentrically disposed on the driving member 11 , the guide member 12 is sleeved on the outer side of the driving member 11 and is rotatably connected with the driving member 11 , and further, the guiding member 12 is the same as the driving member 11 . The shaft arrangement simplifies the structure of the parking guide assembly 1, reduces the space occupied by the parking mechanism in the car, and improves the space utilization rate of the car.

In this embodiment, there is a gap between the inner surface of the guide member 12 and the outer surface of the driving member 11, and the gap is provided with a rolling component 13 for generating rolling friction when the inner surface of the guide member 12 and the outer surface of the driving member 11 rotate relative to each other, which improves the The efficiency of the relative rotation of the guide member 12 and the driving member 11, and the resistance of the relative rotation of the guide member 12 and the driving member 11 is reduced. Specifically, the rolling assembly 13 in this embodiment includes a number of bearing needles arranged along the circumferential direction of the inner ring, The friction force generated by the relative rotation of the guide member 12 and the driving member 11 is reduced, and the rotation performance is improved.

Further, the inner side wall of the shaft hole 111 in this embodiment is provided with a keyway 112 for connecting with the transmission shaft. When the transmission shaft is connected to the output end of the parking drive unit, the driving member 11 and the transmission shaft are connected by a key through the keyway 112, which improves the The stability of the synchronization between the drive member 11 and the transmission shaft.

In addition, since the guide member 12 is in contact with the pawl 2 and pushes the pawl 2 to generate rolling friction with the pawl 2 during the movement process, the relative sliding friction reduces the wear of the pawl 2 and the guide member 12, thereby reducing the guide member 12 and the pawl. 2 The powder and debris generated by the damage improve the cleanliness of the transmission.

Further, this embodiment also provides a transmission, including the above parking mechanism, so as to reduce the loss of the transmission, improve the cleanliness in the transmission, and improve the service life of the transmission.

To sum up, the utility model has a simple structure, which helps to reduce the wear of the pawl 2 and the parking guide assembly 1 , improves the service life and transmission efficiency of the pawl 2 and the parking guide assembly 1 , and reduces the parking guide assembly 1 . Powder and debris from friction with pawl 2 improve cleanliness within the transmission.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present invention, several improvements and replacements can be made. These improvements And replacement should also be regarded as the protection scope of the present invention.

Claims (7)

1. A parking mechanism, characterized in that it comprises a parking guide assembly, a ratchet, and a pawl for cooperating with the ratchet to realize a parking action, the parking guide assembly being provided on a part of the pawl facing away from the ratchet. side; the parking guide assembly includes a driving member and a guiding member for contacting with the pawl and pushing the pawl to move, the driving member is provided with a shaft hole for drivingly connecting with the output end of the parking drive unit through a transmission shaft , the guide member is rotatably connected to the drive member and can rotate around the axis of the shaft hole. 2 . The parking mechanism according to claim 1 , wherein the shaft hole is eccentrically disposed in the driving member, and the guide member is sleeved on the outer periphery of the driving member and is rotatably connected with the driving member. 3 . 3 . The parking mechanism according to claim 2 , wherein there is a gap between the inner side surface of the guide member and the outer side surface of the driving member, and the gap is provided for allowing the inner side surface of the guide member and the outer side surface of the driving member to have a gap. 4 . Rolling components that generate rolling friction when the sides rotate relative to each other. 4. The parking mechanism according to claim 3, wherein the rolling assembly comprises a plurality of bearing needle rollers arranged along the circumferential direction of the inner ring of the guide member. 5 . The parking mechanism according to claim 1 , wherein the inner side wall of the shaft hole is provided with a key groove for connecting with the transmission shaft. 6 . 6 . The parking mechanism according to claim 1 , wherein the guide member and the driving member are coaxially arranged. 7 . 7 . A transmission comprising the parking mechanism according to claim 1 . 8 .

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