CN211778935U

CN211778935U - Torque output device and parking system using same

Info

Publication number: CN211778935U
Application number: CN201922209815.1U
Authority: CN
Inventors: 文俊; 赵玉婷; 许正功; 林霄喆
Original assignee: Yiwu Geely Automatic Transmission Co ltd; Zhejiang Geely Holding Group Co Ltd
Current assignee: Yiwu Geely Automatic Transmission Co ltd; Zhejiang Geely Holding Group Co Ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-10-27
Anticipated expiration: 2029-12-11

Abstract

The utility model provides a torque output device, including first gear, slider and connecting rod, the first gear has first centre of gyration, the first gear can wind the rotation of first centre of gyration, the slider with first gear fixed connection, the slider can with the synchronous rotation of first gear, the one end of connecting rod is equipped with third centre of gyration, the connecting rod can wind third centre of gyration rotation, the connecting rod is equipped with the spout, the slider with the spout sliding fit, the slider along the spout reciprocating motion; on the basis, the utility model also provides a parking system; the utility model provides a pair of moment of torsion output device can with the uniform velocity of slider is rotated and is changed into the variable speed rotary motion of connecting rod can with through reasonable configuration the changeable velocity ratio of size of connecting rod output is used for the parking to satisfy the parking system and carry out the different demands of action different stages to the moment of torsion in the parking.

Description

Torque output device and parking system using same

Technical Field

The utility model relates to a drive arrangement field, in particular to torque output device of parking system and use its parking system.

Background

The function of the parking system is to keep the vehicle from rolling away, especially when the vehicle is stopped down, up a hill and the vehicle is frequently parked. The parking system is a standard configuration of an automatic transmission of a vehicle and meets the requirements of road traffic safety laws. Currently, there are three specific implementations of the power execution of the parking system: zip-lock, hydraulic, and motor-driven. The zip-top parking system has defects in user experience and NVH (Noise, Vibration, Harshness Noise, Vibration and Harshness), and is not suitable for improving the grade of the whole vehicle; the hydraulic parking system increases the functional requirements of the hydraulic system of the whole vehicle and has higher energy consumption; the motor-driven type parking system has the advantages of low energy consumption and quick response, so that most of the vehicles in the market adopt the mode as the power of the parking system to execute.

Generally, the parking system comprises a pawl and a ratchet wheel, wherein the pawl is meshed with the ratchet wheel under the action of a power actuator to realize parking locking. In the early stage of executing the parking action, in order to overcome factors such as vehicle gravity, power inertia and the like, a larger torque needs to be output to the pawl to enable the pawl to be meshed with the ratchet wheel, and parking locking is completed; and at the later stage of executing the parking action, the pawl and the ratchet wheel are engaged, and the torque is required to be continuously output to keep the engaged state, but the required torque is smaller than that at the earlier stage of executing the parking action. Power actuators commonly used in the art, for example: the brushless motor can only output a fixed speed ratio, namely, the output torque is fixed. Therefore, if the output torque is small, the requirement for locking the ratchet wheel at the early stage of executing the parking action cannot be met, and if the output torque is enough, the requirement for locking the ratchet wheel can be met at the later stage of executing the parking action, so that the waste of torque output is caused, and the time spent on shortening the whole parking action execution cycle is not facilitated.

Based on the above-mentioned defect that prior art exists, this application aims at providing a changeable torque output device of velocity ratio, not only can satisfy the different demands to the moment of torsion size in the different stages that the parking action was carried out, can also shorten the parking and move and accomplish required time.

Disclosure of Invention

An object of the present invention is to provide a torque output device, including first gear, slider and connecting rod, first gear has first centre of rotation, first gear can wind first centre of rotation is rotatory, the slider with first gear fixed connection, the slider can with first gear synchronous revolution, the one end of connecting rod is equipped with third centre of rotation, the connecting rod can wind third centre of rotation rotates, the connecting rod is equipped with the spout, the slider with spout sliding fit, the slider is followed spout reciprocating motion.

Specifically, the distance between the third center of rotation and the first center of rotation is greater than the distance between the slider and the first center of rotation.

Specifically, the sliding block rotates around the first rotation center, the movement track of the sliding block is a circle with the first rotation center as a circle center, and the length of the sliding chute is greater than the diameter of the movement track of the sliding block.

Preferably, the slider includes fixed part and free end, the fixed part with the free end is connected, the fixed part with first gear fixed connection, the free end inlays to be located in the spout, the free end can be followed spout reciprocating motion.

Preferably, the sliding groove is provided with a limiting part, the limiting part is arranged on one side, close to the fixing part, of the sliding groove, and the limiting part is used for limiting the sliding block to be separated from the sliding groove.

Preferably, the spout still is equipped with the stop part, the stop part sets up the spout is kept away from one side of fixed part, spacing portion with the stop part is used for with the free end restriction of slider is in the spout.

Further, the device also comprises a second gear, wherein the second gear is provided with a second revolution center and can rotate around the second revolution center, the second gear is provided with second transmission teeth, the first gear is provided with first transmission teeth, and the second transmission teeth can be meshed with the first transmission teeth, so that the second gear drives the first gear to rotate.

Preferably, the rotation radius of the second gear is smaller than that of the first gear, and the transmission ratio between the first gear and the second gear is between 1:2 and 1: 20.

Specifically, the second gear is connected with a driving motor, and the driving motor is used for driving the second gear to rotate around a second rotation center.

The utility model discloses another aspect protects a parking system, including parking transmission shaft, pawl and above-mentioned technical scheme a moment of torsion output device, the one end of parking transmission shaft with the pawl is connected, the other end of parking transmission shaft with the connecting rod is kept away from third centre of rotation's one end is connected.

Because of the technical scheme, the utility model discloses following beneficial effect has:

1) the utility model provides a pair of moment of torsion output device, the connecting rod is kept away from the changeable velocity ratio of size can be exported to third centre of rotation's one end, can change the changeable moment of torsion of size into through reasonable configuration by the variable velocity ratio, satisfies the parking system and carries out the different demands of action different stages to the moment of torsion in the parking.

2) The utility model provides a torque output device compares with traditional constant velocity ratio torque output device, not only can satisfy the demand of parking locking to can shorten the parking and carry out the time that the action was spent.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of a torque output device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 3 is a schematic diagram of the motion traces of the slider and the connecting rod;

FIG. 4 is a schematic illustration of the configuration of the connecting rod output speed ratio in the torque output device;

FIG. 5 is a trend fit plot of the output speed ratio from the first gear to the connecting rod;

FIG. 6 is a graph fitting the variation trend of the output speed ratio from the first gear to the connecting rod in the interval range of 35 to 43 of the included angle alpha in FIG. 5

Fig. 7 is a schematic structural diagram of the torque output device when the included angle γ is 90 °.

In the figure: 10-a first gear, 11-a first rotation center, 12-a first transmission gear, 20-a second gear, 21-a second transmission gear, 22-a second rotation center, 30-a sliding block, 31-a fixed part, 32-a free end, 40-a connecting rod, 41-a sliding groove, 411-a limiting part, 412-a blocking part and 42-a third rotation center.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

Example 1

With reference to fig. 1 to 7, the present embodiment provides a torque output apparatus, including a first gear 10, a slider 30, and a connecting rod 40, where the first gear 10 has a first rotation center 11, the first rotation center 11 is a circle center of the first gear 10, and the first gear 10 can rotate around the first rotation center 11 at a constant speed; the sliding block 30 is fixedly connected with the first gear 10, and the sliding block 30 can rotate synchronously with the first gear 10, that is, the sliding block 30 also rotates at a constant speed with the first rotation center 11 as a circle center; one end of the connecting rod 40 is provided with a third rotation center 42, the other end of the connecting rod 40 is an output end, the connecting rod 40 can rotate around the third rotation center 42, the connecting rod 40 is provided with a sliding groove 41, the sliding block 30 is in sliding fit with the sliding groove 41, and the sliding block 30 reciprocates along the sliding groove 41. As shown in fig. 1, the slider 30 and the link 40 are located on the same side of the first gear 10.

The distance between the third centre of rotation 42 and the first centre of rotation 11 is greater than the distance between the slide 30 and the first centre of rotation 11, i.e. the third centre of rotation 42 is located outside the first gear wheel 10. As shown in fig. 4, the distance between the third center of gyration 42 and the first center of gyration 11 is denoted as L; the distance between the center of the sliding block 30 and the first rotation center 11 is the movement radius of the sliding block 30 and is marked as R; and the distance between the center of the slide block 30 and the third rotation center is recorded as S, then: l is more than R.

Further, the opening length of the chute 41 is such that: when the slide block 30 drives the connecting rod 40 to move to the horizontal position (the left one in fig. 3), the distance between one end of the sliding slot 41 close to the third rotation center 42 and the first rotation center 11 is greater than the distance between the slide block 30 and the first rotation center 11, that is, the slide block 30 can rotate around the first rotation center 11 sufficiently. In other words, the distance between the end of the sliding groove 41 close to the third rotation center 42 and the third rotation center 42 is smaller than the distance between the sliding block 30 and the third rotation center 42 when the sliding block 30 moves to the leftmost side of the first gear.

The slide block 30 rotates around the first rotation center 11, that is, the motion track of the slide block 30 is a circle with the first rotation center as a center and a radius of R, and the length of the slide groove 41 is greater than the diameter of the motion track of the slide block 30, that is, the length of the slide groove 41 is greater than 2R, so that the length of the slide groove 41 meets the requirement of the slide block 30 for motion. That is, the opening length of the chute 41 can be such that: when the slide block 30 moves to the rightmost end of the first gear 10 (as shown in the right-hand end of fig. 3), the distance between one end of the slide groove 41 away from the third rotation center 42 and the third rotation center 42 is greater than the distance between the slide block 30 and the third rotation center 42.

As shown in fig. 4, the first rotation center 11, the third rotation center 42 and the center of the slider 30 form a triangle, and three inner angles of the triangle are α, β and γ (α is opposite to the side S, β is opposite to the side R, and γ is opposite to the side L), respectively. The tangential movement velocity V of the slider 30 can be decomposed into a movement component V perpendicular to said connecting rod 40_XAnd a component of motion V parallel to said link 40_YWherein a component of motion V perpendicular to the connecting rod 40_XIs applied to the link 40 such that the link 40 rotates about the third center of gyration 42. Obviously, when the size of the included angle formed between the connecting line between the first rotation center 11 and the third rotation center 42 and the connecting rod 40 is changed,the movement component V of the slide 30 perpendicular to the connecting rod 40_XIs different. The speed ratio from the first gear 10 to the connecting rod 40 is denoted as i, then:

according to the sine formula and the cosine formula:

S²＝R²+L²-2RLcosα

L²＝R²+S²-2RScosγ

the included angle γ is given as follows:

the ratio i from the first gear 10 to the link 40 is then related to the sides R and L and the angle α:

when the first gear 10 and the connecting rod 40 are selected to determine that R and L are fixed values in the torque output device provided in the embodiment of the present specification, the speed ratio i depends on the size of the included angle α, that is, on the position of the slider 30, according to the above formula.

As shown in fig. 3, a schematic diagram of a trajectory of the sliding block 30 driving the connecting rod 40 to move is shown, specifically, the left one in fig. 3 is that the sliding block 30 moves to the leftmost end of the first gear 10, at this time, the connecting rod 40 is in a horizontal state under the driving of the sliding block 30, the sliding block 30 is located at the left end of the sliding slot 41, and a corresponding included angle α is 0 degree; the right one in fig. 3 is that the slide block 30 moves to the rightmost end of the first gear 10, at this time, the connecting rod 40 is driven by the audit 30 to be in a horizontal state, and the slide block 30 is located at the right end of the sliding groove 41, at this time, the included angle α is 180 degrees; in the middle diagram of fig. 3, the movement of the slider 30 is between the left one of fig. 3 and the right one of fig. 3, and the corresponding included angle α is between 0 and 180 °. It should be noted that fig. 3 only shows the movement traces of the sliding block 30 and the connecting rod 40 when the included angle α is in the range of 0 to 180 °, and the included angle α is in the range of 180 to 360 °, and the movement traces of the sliding block 30 and the connecting rod 40 are similar to that, and are not shown here.

The trend of the speed ratio i is shown in fig. 5 when the included angle α is in the range of 180 ° from 0, and the trend of the speed ratio i is a mirror image of the trend of fig. 5 along a line perpendicular to the X axis of 180 ° when the included angle α is in the range of 180 to 360 °.

As can be seen from fig. 5, the speed ratio i changes drastically in the α ∈ (38 °, 43 °), and is a trend graph of the change of the speed ratio in the range of the included angle α ∈ (38 °, 43 °), as shown in fig. 6. It should be noted that the variation trend curves of the speed ratio i in fig. 5 and 6 are obtained by point fitting.

As can be seen from the above derivation, when the angle γ is 90 °, the speed ratio i is ∞, that is, corresponds to the value shown in fig. 7. It should be noted that the speed ratios i are all instantaneous speed ratios, and the slider 30 is in a rotating state, so that it should be understood that: when the angle α e (38 °, 43 °), the speed ratio from the first gear 10 to the output end of the connecting rod 40 is much larger than the speed ratio of the angle α at other angles in the range of 0 to 180 °, and the theoretical limit value is actually several tens of times larger than the torque corresponding to other angles.

The embodiment of the present disclosure provides a torque output device, which can convert the uniform rotation of the slider 30 into the variable-speed rotation of the connecting rod 40. The speed ratio which can be output by the output end of the connecting rod 40 along with different movement positions of the sliding block 30 is variable, and different requirements of the parking system on torque in different stages of parking execution actions can be met through reasonable configuration.

Preferably, as shown in fig. 2, the sliding block 30 includes a fixed portion 31 and a free end 32, the fixed portion 31 is fixedly connected to the first gear 10, the free end 32 is embedded in the sliding slot 41, and the free end 32 can reciprocate along the sliding slot 41 under the rotation of the first gear 10.

The sliding groove 41 is provided with a limiting portion 411, the limiting portion 411 is arranged on one side of the sliding groove 41 close to the fixing portion 31, and the limiting portion 411 is used for limiting the free end 32 of the sliding block 30 to be disengaged from the sliding groove 41.

The sliding groove 41 is further provided with a blocking portion 412, the blocking portion 412 is arranged on one side of the sliding groove 41 far away from the fixing portion 31, and the limiting portion 411 and the blocking portion 412 are matched to limit the free end 32 of the sliding block 30 in the sliding groove 41.

Alternatively, the sliding groove 41 may penetrate through the connecting rod 40 (as shown in fig. 1 and 2), or may be a through groove with an opening on only one side, that is, the blocking portion 412 may close the side of the sliding groove 41 away from the fixing portion 31.

The inner wall surface of the slide groove 41 is smooth to reduce resistance when the slider 30 slides. Preferably, the opening direction of the sliding slot 41 is parallel to the direction of the connecting rod 40, and further, both ends of the sliding slot 41 have arc surfaces matched with the outer contour of the sliding block 30, so as to facilitate the reciprocating movement of the sliding block 30.

In this embodiment, the device further includes a second gear 20, where the second gear 20 has a second rotation center 22, the second gear 20 is capable of rotating around the second rotation center 22 at a constant speed, the second gear is provided with a second transmission tooth 21, the first gear 10 is provided with a first transmission tooth 12 matched with the second transmission tooth 21, and the second transmission tooth 21 is capable of meshing with the first transmission tooth 12 so that the second gear 20 drives the first gear 10 to rotate at a constant speed. In the present embodiment, the second gear 20 is a driving gear, and the first gear 10 is a driven gear. The speed ratio from the second gear 20 to the first gear 10 is fixed.

The radius of rotation of the second gear 20 is smaller than the radius of rotation of the first gear 10, and the transmission ratio between the first gear 10 and the second gear 20 is in the range of 1:2 to 1:20, respectively. Accordingly, the magnitude of the torque output from the second gear 20 can be increased by the meshing action between the first gear 10 and the second gear 20.

The second gear 20 is connected to a driving motor, and the driving motor drives the second gear 20 to rotate around the second rotation center 22 at a constant speed.

It should be noted that, besides the embodiment of the present specification adopting the manner in which the second gear 20 is used as a driving gear, the first gear 10 may also have other manners, for example, the first gear 10 is driven by a transmission shaft with transmission teeth, and so on.

The torque output device provided by the present specification can convert the uniform rotation of the slider 30 into the variable speed rotation of the connecting rod 40, so that the speed ratio output by the output end of the connecting rod 40 is variable, and can be converted into a torque with a variable size through reasonable configuration. The large torque required for meshing the parking pawl and the ratchet wheel to overcome factors such as the gravity of the vehicle, the power inertia and the like in the early stage of parking execution action can be met; and the requirement of keeping a small torque required by the meshing state of the pawl and the ratchet wheel at the later stage of the parking action is met; and in the later stage of the parking execution action, the speed ratio output by the connecting rod output end is reduced, so that the time spent on the parking execution action is favorably shortened.

Example 2

With reference to fig. 1 to 7, the present embodiment provides a parking system, which includes a parking transmission shaft, a pawl, and a torque output device provided in embodiment 1, wherein one end of the parking transmission shaft is connected to the pawl, and the other end of the parking transmission shaft is connected to one end of the connecting rod 40 away from the third rotation center 42, that is, the other end of the parking transmission shaft is connected to an output end of the connecting rod 40. The parking transmission shaft is used for transmitting the torque with variable magnitude output by the torque output device to the pawl to be meshed with the ratchet wheel to realize parking locking.

Because the speed ratio output by the output end of the connecting rod 40 is variable, the torque output by the output end of the connecting rod 40 can be variable through reasonable configuration. For example: the parking system is in the range of 38 to 43 degrees corresponding to the torque output device included angle alpha in the early stage of the parking action. Therefore, in the early stage of execution, the large torque output by the torque output device can be transmitted to the parking system, and then along with the rotation of the first gear 10, the speed ratio output by the output end of the connecting rod 40 is reduced, namely the output torque is reduced, so that the torque required in the later stage of execution of the parking action of the parking system is met. Thus, the amount of torque delivered by the linkage 40 to the park system is variable, thereby meeting the torque requirements of the different phases of the parking action execution.

While the invention has been described with reference to specific embodiments, it will be appreciated by those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the invention can be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The torque output device is characterized by comprising a first gear (10), a sliding block (30) and a connecting rod (40), wherein the first gear (10) is provided with a first rotation center (11), the first gear (10) can rotate around the first rotation center (11), the sliding block (30) is fixedly connected with the first gear (10), the sliding block (30) can synchronously rotate with the first gear (10), a third rotation center (42) is arranged at one end of the connecting rod (40), the connecting rod (40) can rotate around the third rotation center (42), a sliding groove (41) is formed in the connecting rod (40), the sliding block (30) is in sliding fit with the sliding groove (41), and the sliding block (30) moves back and forth along the sliding groove (41).

2. A torque output device according to claim 1, characterized in that the distance between the third centre of rotation (42) and the first centre of rotation (11) is greater than the distance between the slide (30) and the first centre of rotation (11).

3. A torque output device according to claim 2, wherein said slide (30) rotates around said first rotation center (11), the motion locus of said slide (30) is a circle centered on said first rotation center (11), and the length of said slide slot (41) is greater than the diameter of the motion locus of said slide (30).

4. A torque output device according to claim 1, wherein the slide (30) comprises a fixed portion (31) and a free end (32), the fixed portion (31) is connected with the free end (32), the fixed portion (31) is fixedly connected with the first gear (10), the free end (32) is embedded in the slide groove (41), and the free end (32) can reciprocate along the slide groove (41).

5. A torque output device according to claim 4, wherein said slide groove (41) is provided with a stopper portion (411), said stopper portion (411) being provided on a side of said slide groove (41) close to said fixed portion (31), said stopper portion (411) being adapted to restrict said free end (32) from coming out of said slide groove (41).

6. A torque output device according to claim 5, characterized in that the slide groove (41) is further provided with a blocking portion (412), the blocking portion (412) is arranged on a side of the slide groove (41) remote from the fixing portion (31), and the limiting portion (411) and the blocking portion (412) are used for limiting the free end (32) of the slide block (30) in the slide groove (41).

7. A torque output device according to claim 1, characterized in that the device further comprises a second gear wheel (20), the second gear wheel (20) having a second centre of revolution (22), the second gear wheel (20) being rotatable about the second centre of revolution (22), the second gear wheel being provided with second transmission teeth (21), the first gear wheel (10) being provided with first transmission teeth (12), the second transmission teeth (21) being engageable with the first transmission teeth (12) such that the second gear wheel (20) rotates the first gear wheel (10).

8. A torque output device according to claim 7, characterized in that the radius of rotation of said second gear wheel (20) is smaller than the radius of rotation of said first gear wheel (10), and the transmission ratio between said first gear wheel (10) and said second gear wheel (20) is between 1:2 and 1: 20.

9. A torque output device according to claim 7, characterized in that a drive motor is connected to the second gear wheel (20), said drive motor being adapted to rotate the second gear wheel (20) about a second centre of rotation (22).

10. Parking system, comprising a parking transmission shaft, a pawl and a torque output device according to any of claims 1 to 9, wherein one end of the parking transmission shaft is connected to the pawl and the other end of the parking transmission shaft is connected to the end of the connecting rod (40) remote from the third centre of rotation.