CN221170713U

CN221170713U - Parking mechanism

Info

Publication number: CN221170713U
Application number: CN202323296158.1U
Authority: CN
Inventors: 朱恩强
Original assignee: Lvchuan Beijing Automotive Technology Co ltd
Current assignee: Lvchuan Beijing Automotive Technology Co ltd
Priority date: 2023-12-04
Filing date: 2023-12-04
Publication date: 2024-06-18
Anticipated expiration: 2033-12-04

Abstract

The present utility model relates to a parking mechanism comprising: a shift shaft connector fixedly connected to a shift shaft of the transmission; one end of the push rod is rotatably connected to the gear shifting shaft connecting piece, and the other end of the push rod is provided with a pressure block; a ratchet fixedly connected to one rotating member of the transmission; a pawl having one end connected to a pawl shaft and the other end provided with pawl teeth capable of meshing with the ratchet teeth of the ratchet wheel; the parking mechanism further includes: and the pawl shaft is rotatably supported on the parking seat, and the push rod pressure block can move inside the parking seat and drive the pawl to rotate. The utility model reduces the number of parts, improves the flexibility of arrangement, optimizes the load state of the detent shaft, eliminates the influence of overturning moment, improves the strength and stability of the parking mechanism, and improves the integral integration level of the parking mechanism.

Description

Parking mechanism

Technical Field

The utility model belongs to the technical field of vehicles, and particularly relates to a parking mechanism.

Background

In a stopped state of the vehicle, it is necessary to use a parking mechanism to ensure that the vehicle does not undesirably move. For example, when the vehicle is at an equal red light, or is stopped at a position having a certain gradient, a parking mechanism is required to keep the vehicle in position. The common practice in the prior art is to drive the driving rod assembly through the gear shifting shaft, and the driving pawl rotates around the pawl shaft by a certain angle and then is engaged with the ratchet wheel to realize parking. The detent shaft is connected with the shell, and the detent shaft is generally fixed by processing holes matched with the detent shaft after bosses are formed on the front shell and the rear shell.

For example, chinese patent No. CN217029908U discloses a parking mechanism comprising: a driving part; a parking gear; the pawl assembly is engaged with the parking gear under the action of the driving component, so that parking is realized; the pawl assembly includes: a pawl main body portion on which pawl teeth engageable with the parking gear are provided; the pawl mounting shaft is arranged at one end of the pawl main body part, and the pawl main body part can rotate around the pawl mounting shaft; and the pawl mounting part comprises a mounting hole for mounting a pawl mounting shaft and is used for supporting the pawl mounting shaft. According to the pawl shaft fixing scheme, the pawl shaft is fixed and supported through the integrated pawl seat, but the scheme is stressed by the pawl seat completely, so that a large overturning moment can be generated on a fixing bolt of the pawl seat, the fixing bolt is deformed and loosened, and the problem of low integration level of a pawl assembly is not solved.

Disclosure of utility model

The following improved technical solutions are proposed herein in combination with research and practical experience of the applicant in this field.

A parking mechanism, comprising:

A shift shaft connector fixedly connected to a shift shaft of the transmission;

One end of the push rod is rotatably connected to the gear shifting shaft connecting piece, and the other end of the push rod is provided with a pressure block;

a ratchet fixedly connected to one rotating member of the transmission;

a pawl having one end connected to a pawl shaft and the other end provided with pawl teeth capable of meshing with the ratchet teeth of the ratchet wheel;

The parking mechanism further includes:

And the pawl shaft is rotatably supported on the parking seat, and the push rod pressure block can move inside the parking seat and drive the pawl to rotate.

According to one refinement of the utility model, the parking seat comprises a first side plate and a second side plate which are parallel to one another and on the side of at least one of the first side plate and the second side plate facing the pressure block a guide curve is provided, which guide curve comprises a first portion and a third portion which are parallel to one another and a second portion which connects the first portion and the third portion.

According to a refinement of the utility model, the first, second and third portions are all straight lines;

The pressure block has a tapered portion at an end remote from the shift shaft connector, the taper angle of the tapered portion being equal to the angle of the second portion with the first portion.

According to a refinement of the utility model, the parking seat further comprises a third side plate connecting the first and second side plates.

According to an improvement of the utility model, a spring is arranged on the push rod, one end of the spring is abutted against the pressure block, and the other end of the spring is abutted against a stop structure on the push rod.

According to an improvement of the utility model, one end of the pawl shaft is flush with the outer side of the first side plate, and the other end extends to the outer side of the second side plate and is supported on the shell of the transmission device.

According to a refinement of the utility model, the parking seat is fixedly connected to the housing of the transmission by means of a fastener.

It can be seen that the utility model has the following beneficial effects:

① The parking seat realizes the guiding and supporting functions, so that the number of parts is reduced, the number of mounting points of the parking seat and the shell is correspondingly reduced, the dependence on the shell is reduced, and the flexibility of arrangement is improved;

② One end of the detent shaft is supported by the shell, and the other end of the detent shaft is supported by the parking seat, so that the load state of the detent shaft is optimized, the influence of overturning moment is eliminated, and the strength and stability of the parking mechanism are improved;

③ Through the improvement of the parking seat, the integral integration level of the parking mechanism is improved, and the assembly steps are simplified.

Drawings

Exemplary embodiments of the present utility model are described with reference to the accompanying drawings, in which:

Fig. 1 shows a perspective view of an angle of the parking mechanism of the present utility model.

Fig. 2 shows a front view of the parking mechanism of the present utility model, with parts broken away.

Fig. 3 shows another angular perspective view of the parking mechanism of the present utility model.

Detailed Description

Embodiments of the present utility model are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding and enabling description of the utility model to one skilled in the art. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. Furthermore, it should be understood that the utility model is not limited to specific described embodiments. Rather, any combination of the features and elements described below is contemplated to implement the utility model, whether or not they relate to different embodiments. Thus, the following aspects, features, embodiments and advantages are merely illustrative and should not be considered features or limitations of the claims except where explicitly set out in a claim.

Description of orientations such as "upper", "lower", "inner", "outer", "radial", "axial", etc. which may be used in the following description are for convenience of description only and are not intended to limit the inventive arrangements in any way unless explicitly stated. Furthermore, terms such as "first," "second," and the like, are used hereinafter to describe elements of the present utility model, and are merely used for distinguishing between the elements and not intended to limit the nature, sequence, order, or number of such elements.

Fig. 1 shows a perspective view of an angle of the parking mechanism of the present utility model. As can be seen from fig. 1, the parking mechanism of the present utility model includes a shift shaft connector 1, a push rod 2, a parking seat 3, a pawl 4, and a ratchet 5. Specifically, the shift shaft connector 1 is connected to the shift shaft at one end and to the push rod 2 at the other end. The shift spindle connection 1 is non-rotatably connected to the shift spindle, so that the shift spindle connection 1 can be brought into rotation when the shift spindle rotates. The shift shaft connector 1 is rotatably connected to the push rod 2, whereby the shift shaft connector 1 can bring the push rod 2 into a combined motion of a linear motion and a rotational motion when the shift shaft connector 1 rotates with the rotation of the shift shaft.

Fig. 2 shows a front view of the parking mechanism of the present utility model, with parts broken away. As can be seen from fig. 2, the push rod 2 is connected at one end to the shift spindle connection 1 and at the other end has a pressure block 21. When the shift spindle connection 1 rotates counterclockwise, on the one hand the push rod 2 moves to the left inside the parking seat 3 and on the other hand the pressure piece 21 is pressed by the contour inside the parking seat 3 to move downward, so that there is also a counterclockwise rotation of the push rod 2. When the pressure block 21 is pressed in a leftward movement, the pressure block 21 in turn presses the pawl 4 downward, so that the ratchet teeth on the pawl 4 enter between the ratchet teeth on the ratchet wheel 5. The ratchet wheel 5 is itself fixedly connected to one shaft of the transmission, for example, it may be connected to the output shaft of the transmission. This fixed connection may be a splined connection, also internal splines inside the ratchet wheel 5 are shown in fig. 1 and 2.

One end of the pawl 4 is rotatably connected to the parking seat 3 through a pawl shaft, and the other end is provided with a ratchet. The parking seat 3 is fixed to a stationary part, for example to a housing or the like of the gearbox. Thus, when the ratchet teeth on the pawl 4 are clamped between the two ratchet teeth of the ratchet wheel 5, if the vehicle moves, the wheels drive the shaft of the gearbox to rotate, so that the ratchet wheel 5 is driven to rotate. However, in this case, the ratchet wheel 5 is held against the pawl 4 and cannot rotate, so that the rotation of the shaft in the gearbox and thus of the wheels is prevented, and thus the undesired movement of the vehicle is prevented.

Fig. 3 shows another angular perspective view of the parking mechanism of the present utility model. As can be seen in connection with fig. 1 to 3, as an important improvement of the present utility model, the saddle 3 is provided as a single unit comprising two side plates, herein referred to as a first side plate and a second side plate, connected to each other by a connecting plate. As can be seen from fig. 1, the first side plate is provided with a first hole for supporting the detent shaft 6. The diameter of the first hole may be substantially the same as the diameter of the pawl shaft 6. As can be seen from fig. 3, a second hole is provided in a second side plate arranged parallel to the first side plate, also for supporting the detent shaft 6. The diameter of the second hole is significantly larger than the diameter of the pawl shaft 6 and a torsion spring is also provided in the second hole to provide torque to the pawl shaft 6. The pawl shaft 6 is fixedly connected to the pawl 4, and the pawl shaft 6 always has a tendency to move the pawl teeth of the pawl 4 away from the ratchet wheel 5 under the action of the torsion spring.

One end of the detent shaft 6 is flush with the outside of the first side plate and the other end extends beyond the outside of the second side plate and further into a hole in the housing of the overall transmission, and is also supported by the housing. Thus, the parking seat 3 serves as both the fixing structure of the detent shaft 6 and the guide structure of the push rod 2, which reduces the number of parts and improves the integration compared with the prior art. Meanwhile, as one end of the pawl shaft also extends into the shell, the load state supported by the pawl shaft is improved.

As can be seen in connection with fig. 1 to 3, at least one fastener, for example a threaded fastener, may be provided on the first and second side plates in order to fix the parking seat 3 to the housing or other fixing means.

As can be seen from fig. 2, on the side of the second side plate facing the pawl 4, a guide curve is provided. The guide curve comprises two first and third portions parallel to each other, and a second portion connecting the first and third portions. Thereby, the second portion can move the pressure block 21 downwards, thereby engaging the pawl 4 with the ratchet wheel 5. Preferably, a corresponding guide curve is also provided on the first side plate, so that the pressure block 21 can be smoothly moved. Further, at the front end of the pressure block 21, a taper portion may be provided, the taper of which is the same as the inclination angle of the second portion with respect to the first portion or the third portion, whereby smooth movement can be achieved.

Furthermore, as can be seen from fig. 2, a compression spring can also be provided on the push rod 2, which spring has one end abutting against the pressure block and the other end abutting against a stop structure on the push rod 2. The pressure block 21 can thereby be arranged in a movable fashion, which makes the construction more flexible.

What has been described above is merely illustrative of the embodiments of the present utility model with respect to the spirit and principles of the utility model. It will be apparent to those skilled in the art that various changes may be made to the described examples and equivalents thereof without departing from the spirit and principles of the utility model, which are intended to be within the scope of the utility model as defined in the following claims.

Claims

1. A parking mechanism, comprising:

a shift shaft connection (1), the shift shaft connection (1) being fixedly connected to a shift shaft of a transmission;

A push rod (2), one end of the push rod (2) is rotatably connected to the gear shift shaft connecting piece (1), and the other end of the push rod is provided with a pressure block (21);

a ratchet wheel (5), said ratchet wheel (5) being fixedly connected to one rotating part of the transmission;

A pawl (4), one end of the pawl (4) being connected to a pawl shaft (6), the other end having pawl teeth which are capable of meshing with the ratchet teeth of the ratchet wheel (5);

the parking mechanism is characterized by further comprising:

-a parking seat (3), the pawl shaft (6) being rotatably supported to the parking seat (3), and the push rod pressure block (21) being movable inside the parking seat (3) and thereby driving the pawl (4) in rotation.

2. A parking mechanism as claimed in claim 1, wherein:

The parking seat (3) includes a first side plate and a second side plate that are parallel to each other, and a guide curve including a first portion and a third portion parallel to each other and a second portion connecting the first portion and the third portion is provided on a side of at least one of the first side plate and the second side plate facing the pressure block (21).

3. A parking mechanism as claimed in claim 2, wherein:

The first portion, the second portion and the third portion are all straight lines;

The pressure block (21) has a conical portion at an end remote from the shift spindle connection (1), the cone angle of which is equal to the angle of the second portion with the first portion.

4. A parking mechanism as claimed in claim 2, wherein:

the parking seat (3) further comprises a third side plate, and the third side plate is connected with the first side plate and the second side plate.

5. The parking mechanism of any one of claims 1-4, wherein:

The push rod (2) is provided with a spring, one end of the spring is abutted against the pressure block (21), and the other end of the spring is abutted against a stop structure on the push rod (2).

6. A parking mechanism as claimed in any one of claims 2 to 4, wherein:

One end of the pawl shaft (6) is flush with the outer side of the first side plate, and the other end of the pawl shaft extends to the outer side of the second side plate and is supported on the shell of the transmission device.

7. The parking mechanism of any one of claims 1-4, wherein:

The parking seat (3) is fixedly connected to the housing of the transmission device through a fastener.