Parking mechanism manual unlocking device, unlocking method, speed reducer and new energy vehicle

Abstract

This invention belongs to the field of new energy vehicle technology, and particularly relates to a manual unlocking device, unlocking method, reducer, and new energy vehicle for a parking mechanism. The manual unlocking device for the parking mechanism of this invention includes: an unlocking adapter shaft with an unlocking through hole, the unlocking through hole comprising a first arc-shaped portion and a second portion for rotating a parking shift shaft, the second portion having a first engagement point and a second engagement point, the angle between the first engagement point and the second engagement point in the rotation direction of the shift adapter shaft being greater than the angle at which the parking shift shaft rotates from a parking state to a released parking state; and an unlocking rocker arm, one end connected to the unlocking shaft, and the other end extending away from the rotation center of the unlocking adapter shaft. This invention not only enables manual unlocking in emergency situations but also offers higher reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, and in particular to a parking mechanism manual unlocking device, an unlocking method, a speed reducer and a new energy vehicle. BACKGROUND

[0002] In automobile parts, the gearbox (speed reducer) is the most core part, and the parking mechanism is one of the indispensable mechanisms in the automatic gearbox. Its function is to engage the parking pawl and the ratchet wheel by driving the parking shift shaft through the parking motor after the vehicle stops. However, the parking motor is an electronic drive unit, and it is inevitable to have failures such as failure to act. At this time, if the vehicle needs to be unlocked, an emergency manual unlocking device needs to be added. Although there are manual unlocking methods for unlocking the parking mechanism in the prior art, the current manual unlocking method is easy to interfere with the original parking mechanism, resulting in low reliability of the manual unlocking device. SUMMARY

[0003] Therefore, the embodiments of the present application provide a parking mechanism manual unlocking device, an unlocking method, a speed reducer and a new energy vehicle to solve the technical problem of low reliability of the manual unlocking method in the prior art.

[0004] The technical solution adopted by the present application is:

[0005] In a first aspect, the present application provides a parking mechanism manual unlocking device, comprising:

[0006] The unlocking adapter shaft is provided with an unlocking through hole, the unlocking through hole comprises a first part in the shape of a circular arc and a second part for driving the parking shift shaft to rotate, the second part is provided with a first engagement point and a second engagement point, and the angle between the first engagement point and the second engagement point in the rotation direction of the shift adapter shaft is greater than the angle of the parking shift shaft from the parking state to the parking release state.

[0007] The unlocking rocker arm is connected to the unlocking adapter shaft at one end and extends away from the rotation center of the unlocking adapter shaft at the other end.

[0008] Preferably, the second part includes a first arc segment, a second arc segment, and a third arc segment connected in sequence. One end of the first part is connected to the first arc segment, and the other end is connected to the third arc segment. The arc length of the second arc segment is greater than the arc length of the first and third arc segments. The curvature of the second arc segment is less than the curvature of the first and third arc segments. The curvature of the first and third arc segments is less than the curvature of the first part. The first, second, and third arc segments are all concave in a direction away from the rotation center of the unlocking adapter shaft. The first engagement point is located at the junction of the first and second arc segments, and the second engagement point is located at the junction of the second and third arc segments.

[0009] Preferably, the unlocking rocker arm includes a connecting part and an extension part. The connecting part is annular and surrounds the outer wall of the unlocking adapter shaft and is connected to the unlocking adapter shaft. One end of the extension part is connected to the unlocking adapter shaft, and the other end extends in a direction away from the rotation center of the unlocking adapter shaft.

[0010] Preferably, the unlocking adapter shaft is in the shape of a hollow cylinder. The peripheral wall of the hollow cylinder is provided with a groove recessed towards the axis of the connecting part. The groove includes a first side, a second side, a third side, a fourth side, a fifth side, and a sixth side connected in sequence. The first and third sides are parallel to the axis of the unlocking adapter shaft, the second and fifth sides are perpendicular to the first side, the angle between the fourth and third sides is greater than 90 degrees and less than 180 degrees, and the angle between the first and sixth sides is greater than 90 degrees and less than 180 degrees. The inner wall of the connecting part is provided with a first arc-shaped groove and a second arc-shaped groove corresponding to the groove. The portion where the first and sixth sides meet is located in the first arc-shaped groove, and the portion where the fourth and third sides meet is located in the second arc-shaped groove.

[0011] Preferably, the extension includes a first portion and a second portion, one end of the first portion is connected to the connecting portion, and the other end is connected to the second portion, the angle between the first portion and the connecting portion is an obtuse angle, and the angle between the second portion and the first portion is an obtuse angle.

[0012] Preferably, the end of the unlocking rocker arm away from the unlocking adapter shaft is provided with a rectangular through hole.

[0013] Preferably, it also includes an elastic element, one end of which is rotatably connected to the rocker arm, and the other end of which is provided with an opening for fitting onto the limiting structure of the reducer housing.

[0014] Secondly, the present invention also provides a speed reducer, the speed reducer including a housing, a parking mechanism and a manual unlocking device for the parking mechanism as described in the first aspect, the parking mechanism including a parking shift shaft and a parking gear plate, the parking gear plate being connected to the parking shift shaft, the shift shaft being provided with an arc surface and a flat groove surface, the two ends of the arc surface being respectively connected to the two ends of the flat groove surface, and the unlocking through hole of the manual unlocking device for the parking mechanism being sleeved on the shift shaft.

[0015] Thirdly, the present invention also provides a new energy vehicle, including the reducer described in the second aspect.

[0016] Fourthly, the present invention also provides a method for manually unlocking a parking mechanism, the method comprising the following steps:

[0017] S1: When the parking mechanism is in the parking state, rotate the unlocking rocker arm from the initial position in the direction of releasing the parking state until the first engagement point abuts against the parking shift shaft, wherein the rotation angle of the unlocking rocker arm is the first angle;

[0018] S2: Continue to rotate the unlocking rocker arm in the direction of releasing the parking state, wherein the angle of rotation of the unlocking rocker arm is the second angle, the second angle is the angle of rotation of the parking shift shaft from the parking state to the released parking state, and the first angle is greater than the second angle;

[0019] S3: After troubleshooting the parking malfunction, rotate the shift rocker arm to its initial position and fix it.

[0020] Beneficial Effects: The manual unlocking device, unlocking method, reducer, and new energy vehicle of the present invention, by setting the unlocking through hole on the unlocking shaft as an arc-shaped first part and a second part for driving the parking shift shaft to rotate, and setting a first engagement point and a second engagement point on the second part with an angle greater than the angle at which the parking shift shaft rotates from the parking state to the released state, allows the parking mechanism to freely switch between the parking state and the released state under normal circumstances without interfering with the unlocking adapter shaft. In the event of an abnormal parking mechanism, the parking shift shaft can be driven to rotate to the angular position of the released parking mechanism by using the engagement point after the unlocking adapter shaft has rotated a certain angle. Because the manual unlocking device and the parking mechanism do not interfere with each other when the parking mechanism is in a normal state, and can drive the parking shift shaft to rotate and release the parking mechanism in the event of parking mechanism failure, the present invention has higher reliability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of the present invention.

[0022] Figure 1 This is a three-dimensional structural diagram of the manual unlocking device for the parking mechanism of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the manual unlocking device of the parking mechanism of the present invention cooperating with the parking shift shaft of the parking mechanism;

[0024] Figure 3 This is a front view of the manual unlocking device of the parking mechanism of the present invention cooperating with the parking shift shaft of the parking mechanism;

[0025] Figure 4 This is a schematic diagram of the unlocking through hole on the unlocking adapter shaft of the present invention;

[0026] Figure 5 This is a three-dimensional structural schematic diagram of the parking shift shaft in this invention;

[0027] Figure 6 This is a three-dimensional structural schematic diagram of the unlocking adapter shaft of the present invention;

[0028] Figure 7 This is a partial structural diagram of the groove on the unlocking adapter shaft of the present invention;

[0029] Figure 8 This is a three-dimensional structural diagram of the unlocking rocker arm of the manual unlocking device of the present invention.

[0030] Figure 9 This is a partial structural diagram of the cooperation between the unlocking rocker arm and the unlocking adapter shaft in the manual unlocking device of the present invention;

[0031] Figure 10 This is a three-dimensional structural diagram of the manual unlocking device and parking mechanism of the present invention.

[0032] Figure 11 This is a three-dimensional structural diagram of the manual unlocking device of the present invention installed in the reducer;

[0033] Figure 12 This is a three-dimensional structural diagram of the speed reducer of the present invention.

[0034] The components and their numbers shown in the picture:

[0035] The parking mechanism includes a manual unlocking device 100, an unlocking adapter shaft 1, an unlocking through hole 10, a first part 11, a second part 12, a first engagement point 121, a second engagement point 122, a first arc segment 123, a second arc segment 124, a third arc segment 125, a groove 13, a first side 131, a second side 132, a third side 133, a fourth side 134, a fifth side 135, a sixth side 136, an unlocking rocker arm 2, a connecting part 21, a first arc groove 211, a second arc groove 212, an extension part 22, a first section 221, a second section 222, a rectangular through hole 223, an elastic element 3, an opening 31, a housing 4, a limiting post 41, a parking mechanism 5, a parking shift shaft 51, an arc surface 511, a flat groove surface 512, a parking gear plate 52, and a motor 53. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, the element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Where there is no conflict, embodiments of the present invention and the various features thereof can be combined with each other, all of which are within the scope of protection of the present invention.

[0037] Example 1

[0038] like Figure 1 and Figure 2 As shown, this embodiment 1 provides a manual unlocking device 100 for a parking mechanism, which includes an unlocking adapter shaft 1 and an unlocking rocker arm 2.

[0039] likeFigure 3 As shown, the unlocking adapter shaft 1 is provided with an unlocking through hole 10. The unlocking through hole 10 includes an arc-shaped first part 11 and a second part 12 for driving the parking shift shaft 51 to rotate. The second part 12 is provided with a first engagement point 121 and a second engagement point 122. The angle between the first engagement point 121 and the second engagement point 122 in the rotation direction of the adapter shaft is greater than the angle at which the parking shift shaft 51 rotates from the parking state to the released parking state.

[0040] like Figure 2 and Figure 10 As shown, a parking shift shaft 51 is equipped with a parking gear plate 52. Under normal circumstances, the parking motor 53 drives the parking shift shaft 51 to rotate, which in turn drives the parking gear plate 52 to rotate, thereby switching the parking mechanism 5 between the parking state and the released state. Typically, when the parking shift shaft 51 rotates to a set first angle position, the parking mechanism 5 is in the parking state; when it rotates to a set second angle position, the parking mechanism 5 is in the released state. Therefore, the angle required for the parking shift shaft 51 to switch from the parking state to the released state is the angle between the first and second angle positions. The outer wall of the parking shift shaft 51 consists of an arc surface 511 and a flat groove surface 512, wherein the axis of the arc surface 511 coincides with the axis of rotation of the parking shift shaft 51.

[0041] In this embodiment 1, the unlocking adapter shaft 1 is a hollow adapter shaft. A through hole, referred to in this application as the unlocking through hole 10, is provided at the center of the unlocking adapter shaft 1. The unlocking through hole 10 in this embodiment 1 mainly consists of two parts. The inner wall of one part is arc-shaped, and the center of the arc is located on the rotation axis of the parking shift shaft 51. The inner wall of the first part 11 of the unlocking through hole 10 is used in conjunction with the arc surface 511 on the parking shift shaft 51. The two can be set as complementary shapes, so that the unlocking through hole 10 can rotate accurately around the rotation axis of the parking shift shaft relative to the parking shift shaft. Because this embodiment 1 has two engagement points on the inner wall of the unlocking through hole 10, when the unlocking adapter shaft 1 rotates relative to the parking shift shaft 51 until either of the two engagement points abuts against the flat groove surface 512 of the parking shift shaft 51, the unlocking adapter shaft 1 can no longer rotate relative to the parking shift shaft 51. Therefore, with the structure of this embodiment 1, the rotation of the unlocking adapter shaft 1 relative to the parking shift shaft 51 has a certain angular range. The angle between the first engagement point 121 and the second engagement point 122 in the direction of shaft rotation refers to the angle between the line connecting the first engagement point 121 and the axis of the shift adapter shaft and the line connecting the second engagement point 122 and the axis of the shift adapter shaft.

[0042] Under normal circumstances, the unlocking adapter shaft 1 is in its initial state. In this initial state, the unlocking adapter shaft 1 is in its initial angular position. Since the angle between the first engagement point 121 and the second engagement point 122 in the direction of shaft rotation is greater than the angle at which the parking shift shaft 51 rotates from the parking state to the released state, setting the initial angular position ensures that when the unlocking adapter shaft 1 is in its initial angular position, the parking shift shaft 51 will not abut against the two engagement points on the unlocking adapter shaft 1, regardless of whether it is in the parking state or the released state. Furthermore, the parking shift shaft 51 will not abut against the two engagement points on the unlocking adapter shaft 1 during the process of rotating from the parking state to the released state. Thus, when the unlocking adapter shaft 1 is in its initial angular position, the parking mechanism 5 can freely switch between the parking state and the released state without interfering with the unlocking adapter shaft 1.

[0043] If the parking mechanism 5 malfunctions and the vehicle cannot be moved while in the parking state, the unlocking adapter 1 can be rotated by a small gap until the first engagement point 121 abuts against the parking shift shaft 51. During this process, the parking shift shaft 51 will not rotate with the unlocking adapter 1. After the first engagement point 121 abuts against the parking shift shaft 51, continue rotating the unlocking adapter 1 in the same direction. The parking shift shaft 51 will then continue to rotate under the influence of the unlocking adapter 1 until it reaches the angle position that releases the parking mechanism 5. During this process, the rotation angle of the unlocking adapter 1 is equal to the angle by which the parking shift shaft 51 rotates from the parking state to the released state. Because the unlocking adapter 1 needs to rotate by a small gap before it can rotate the parking shift shaft 51 to the released state, accidental release of the parking mechanism due to accidental activation of the unlocking adapter 1 can be avoided.

[0044] One end of the unlocking rocker arm 2 is connected to the unlocking shaft, and the other end extends away from the rotation center of the unlocking adapter shaft 1. When unlocking manually, a tool can be used to apply force to the end of the unlocking rocker arm 2 away from the rotation center of the unlocking adapter shaft 1, which can generate a large torque to drive the unlocking adapter shaft 1 to rotate a sufficient angle.

[0045] like Figure 4As shown, as an optional but advantageous implementation, in this embodiment 1, the second part 12 includes a first arc segment 123, a second arc segment 124, and a third arc segment 125 connected in sequence. One end of the first part 11 is connected to the first arc segment 123, and the other end is connected to the third arc segment 125. The arc length of the second arc segment 124 is greater than the arc lengths of the first arc segment 123 and the third arc segment 125, and the curvature of the second arc segment 124 is less than that of the first arc segment 125. The curvature of the first arc segment 123 and the third arc segment 125 is less than the curvature of the first part 11. The first arc segment 123, the second arc segment 124 and the third arc segment 125 are all concave in the direction away from the rotation center of the unlocking adapter shaft 1. The first engagement point 121 is located at the junction of the first arc segment 123 and the second arc segment 124. The second engagement point 122 is located at the junction of the second arc segment 124 and the third arc segment 125.

[0046] like Figure 4 and Figure 5 As shown, in this embodiment 1, the first arc segment 123, the second arc segment 124, and the third arc segment 125 form meshing teeth. The arc length of the second arc segment 124 is greater than that of the first arc segment 123 and the third arc segment 125, and the curvature of the second arc segment 124 is less than that of the first arc segment 123 and the third arc segment 125. The curvature of the first arc segment 123 and the third arc segment 125 is less than that of the first part 11. The structural feature that the first arc segment 123, the second arc segment 124, and the third arc segment 125 are all recessed in a direction away from the rotation center of the unlocking adapter shaft 1 allows the unlocking through hole 10 to avoid the outer wall of the parking shift shaft 51 during the rotation gap angle. After the unlocking through hole 10 has rotated through the gap angle, it can reliably mesh with the flat groove surface 512 of the parking shift shaft 51 through the intersection point of the two adjacent arc segments, thereby driving the parking shift shaft 51 to continue rotating.

[0047] like Figure 6 and Figure 8 As shown, as an optional but advantageous implementation, the rocker arm in this embodiment 1 includes a connecting part 21 and an extension part 22. The connecting part 21 is annular and surrounds the outer wall of the unlocking adapter shaft 1 and is connected to the unlocking adapter shaft 1. One end of the extension part 22 is connected to the unlocking adapter shaft 1, and the other end extends in a direction away from the rotation center of the unlocking adapter shaft 1.

[0048] like Figure 1 and Figure 6As shown, in this embodiment 1, the part of the unlocking rocker arm 2 connected to the unlocking adapter shaft 1 is set as an annular shape, and the remaining part extends away from the rotation center of the unlocking adapter shaft 1. This allows for easy application of force to the extension 22 to drive the unlocking adapter shaft 1 to rotate. The left and right forces of the extension 22 are transmitted to various positions in the circumferential direction of the unlocking adapter shaft 1 through the annular connecting part 21. Thus, only one force needs to be applied to the extension 22 of the unlocking rocker arm 2 to apply torque to various positions in the circumferential direction of the unlocking adapter shaft 1, thereby enabling the unlocking adapter shaft 1 to rotate quickly and reliably without causing damage to the unlocking adapter shaft 1.

[0049] like Figure 7 As shown, as an optional but advantageous implementation, the unlocking adapter shaft 1 in this embodiment 1 is in the shape of a hollow cylinder. A groove 13, recessed towards the axis of the connecting portion 21, is provided on the peripheral wall of the unlocking adapter shaft 1. The groove 13 includes a first side 131, a second side 132, a third side 133, a fourth side 134, a fifth side 135, and a sixth side 136 connected in sequence. The first side 131 and the third side 133 are parallel to the axis of the unlocking adapter shaft 1. The second side 132 and the fifth side are perpendicular to the first side 131. The angle between the fourth side 134 and the third side 133 is greater than 90 degrees and less than 180 degrees. The angle between the first side 131 and the sixth side 136 is greater than 90 degrees and less than 180 degrees. Figure 8 As shown, the inner wall of the connecting portion 21 is provided with a first arc-shaped groove 211 and a second arc-shaped groove 212 corresponding to the groove 13. The first arc-shaped groove 211 is concave inward in a direction away from the central axis of the connecting portion 21, and the second arc-shaped groove 212 is also concave inward in a direction away from the central axis of the connecting portion 21. The axial directions of the first arc-shaped groove 211 and the second arc-shaped groove 212 are parallel to the axial direction of the unlocking adapter shaft 1. Figure 9 As shown, the portion where the first side 131 and the sixth side 136 of the groove 13 meet is located in the first arc-shaped groove 211, and the portion where the fourth side 134 and the third side 133 meet is located in the second arc-shaped groove 212.

[0050] In this embodiment 1, the unlocking adapter shaft 1 is designed as a hollow cylinder, and a hexagonal groove 13 is provided on the outer wall of the unlocking adapter shaft 1. Two arc-shaped grooves are correspondingly provided on the inner wall of the connecting part 21. The obtuse angle of the sixth side 136 forms a notch at the position of the first side 131, allowing the first side 131 to extend into the first arc-shaped groove 211. Simultaneously, the obtuse angle of the fourth side 134 forms a notch at the position of the third side 133, allowing the third side 133 to extend into the second arc-shaped groove 212. In this way, whether the unlocking rocker arm 2 rotates clockwise or counterclockwise under external force, either of the two arc-shaped grooves can reliably contact the unlocking adapter shaft 1, thereby enabling the annular connecting part 21 of the unlocking rocker arm 2 to reliably drive the unlocking adapter shaft 1 to rotate. Since the first side 131 and the third side 133 are parallel to the axial direction of the unlocking adapter shaft 1, and the axial directions of the first arc groove 211 and the second arc groove 212 are parallel to the axial direction of the unlocking adapter shaft 1, the cooperation between the two arc grooves and the first side 131 and the third side 133 on the unlocking adapter shaft 1 ensures that the torque ultimately applied to the unlocking adapter shaft 1 only drives the unlocking adapter shaft 1 to rotate around its axial direction, without any component force in other directions. This improves the unlocking efficiency and avoids damage to the unlocking adapter shaft 1 due to stress. Furthermore, the aforementioned structure allows for circumferential positioning of the unlocking rocker arm 2 and the unlocking adapter shaft 1 during assembly, achieved by utilizing the cooperation between the first side 131 and the third side 133 and the first arc groove 211 and the second arc groove 212. During assembly, the arc grooves can be aligned with their corresponding sides first, and then the unlocking adapter shaft 1 can be axially inserted into the annular connecting part 21. In specific implementation, multiple grooves 13 can be evenly arranged in the circumferential direction on the outer wall of the unlocking adapter shaft 1, and multiple sets of first arc grooves 211 and second arc grooves 212 can be arranged on the annular connecting part 21 accordingly. This allows the adapter shaft to be evenly forceped at various circumferential positions, so that the annular connecting part 21 can apply torque to the adapter shaft at various positions even in the narrow space of the reducer.

[0051] As an optional but advantageous implementation, in this embodiment 1, a protrusion is further provided between the first arc-shaped groove 211 and the second arc-shaped groove 212, the protrusion being complementary to the groove 13. The protrusion is embedded in the groove 13. On the one hand, this embodiment 1 can utilize the complementary feature of the protrusion and the groove 13 to assemble and position the unlocking adapter shaft 1 and the unlocking rocker arm 2; on the other hand, a contact point between the connecting part 21 and the unlocking adapter shaft 1 can be provided between the two arc-shaped grooves to further improve the reliability of manual unlocking.

[0052] like Figure 8As shown, as an optional but advantageous implementation, in this embodiment 1, the extension 22 includes a first portion 221 and a second portion 222. One end of the first portion 221 is connected to the connecting portion 21, and the other end is connected to the second portion 222. The angle between the first portion 221 and the connecting portion 21 is an obtuse angle, and the angle between the second portion 222 and the first portion 222 is also an obtuse angle. In this embodiment, the extension 22 extends from the position connected to the connecting portion 21 in a direction away from the parking gear plate 52. On the one hand, this allows for sufficient operating space between the extension 22 and the parking gear plate 52; on the other hand, the two obtuse angles during the extension process give the extension 22 better flexibility.

[0053] like Figure 8 As shown, in this embodiment 1, a rectangular through hole is provided at the end of the unlocking rocker arm 2 away from the unlocking adapter shaft 1. This allows a tool for applying force to be connected to the unlocking rocker arm 2 through the rectangular through hole 223, thereby enabling the tool to rotate the unlocking rocker arm 2.

[0054] like Figure 8 As shown, as an optional but advantageous implementation, this embodiment 1 also includes an elastic element 3, one end of which is rotatably connected to the rocker arm, and the other end is provided with an opening 31, which is used to fit onto the limiting structure of the reducer housing 4.

[0055] Under normal circumstances, the opening 31 of the elastic element 3 is fitted onto the limiting post 41 provided on the reducer housing 4. At this time, the angular position of the unlocking rocker arm 2 is fixed by the elastic element 3, and the unlocking adapter shaft 1 remains in the initial angular position. This ensures that the parking mechanism 5 can freely switch between the parking state and the unlocked state when it is working normally, without interfering with or affecting the manual unlocking mechanism, thereby further improving the reliability of the device. The elastic element 3 can be a spring sheet.

[0056] When the parking mechanism 5 malfunctions and requires manual unlocking, the spring plate can be lifted first and the limiting post 41 of the housing 4 can be rotated out. A tool can be placed on the unlocking rocker arm 2, and the unlocking rocker arm 2 can be rotated clockwise to make the internal unlocking adapter shaft 1 rotate synchronously. As an optional but advantageous implementation, this embodiment 1 can also provide an operating part extending away from the hole 31 on the side of the opening 31 away from the axis of rotation of the adapter shaft, so that the operator can easily rotate the elastic element 3 through the operating part.

[0057] Example 2

[0058] Based on the manual unlocking device of the parking mechanism in Embodiment 1 of the present invention, such as Figure 11 and Figure 12As shown, this embodiment 2 provides a speed reducer, which includes a housing 4, a parking mechanism 5, and a parking mechanism manual unlocking device 100 as described in embodiment 1. The parking mechanism 5 includes a parking shift shaft 51 and a parking gear plate 52. The parking gear plate 52 is connected to the parking shift shaft 51. The shift shaft is provided with an arc surface 511 and a flat groove surface 512. The two ends of the arc surface 511 are respectively connected to the two ends of the flat groove surface 512. The unlocking through hole 10 of the parking mechanism manual unlocking device 100 is sleeved on the shift shaft.

[0059] In this embodiment 2, the reducer utilizes the unlocking through-hole 10 on the manual unlocking device in conjunction with the shift shaft. Under normal circumstances, the parking shift shaft 51 can rotate freely between the parking state and the unlocked state without interfering with the manual unlocking device. When the parking mechanism 5 malfunctions, the unlocking adapter 1 is first rotated by a gap angle, and then the parking shift shaft 51 continues to rotate under the drive of the unlocking adapter 1 until the parking mechanism 5 is in the unlocked position.

[0060] Example 3

[0061] This embodiment 3 provides a new energy vehicle, which includes the reducer in embodiment 2. For details, please refer to the description of embodiment 2, which will not be repeated here.

[0062] Since the new energy vehicle in this embodiment 3 uses the reducer in embodiment 2, this embodiment 3 can improve the reliability of the manual unlocking device.

[0063] Example 4

[0064] Based on the manual unlocking device for the parking mechanism in Embodiment 1 of the present invention, Embodiment 4 further provides a method for manually unlocking the parking mechanism 5, which includes the following steps:

[0065] S1: When the parking mechanism 5 is in the parking state, rotate the unlocking rocker arm 2 from the initial position in the direction of releasing the parking state until the first engagement point 121 abuts against the parking shift shaft 51, wherein the rotation angle of the unlocking rocker arm 2 is the first angle;

[0066] The initial position refers to the angular position of the unlocking adapter shaft 1, where the parking shift shaft 51 will not abut against the two engagement points on the unlocking adapter shaft 1, whether in the parking or unlocked state, and also will not abut against the two engagement points on the unlocking adapter shaft 1 during the rotation from the parking to the unlocked state. This step first unlocks the rocker arm 2 by adjusting the rotation clearance angle; during this process, the unlocking adapter shaft 1 will not cause the parking shift shaft 51 to rotate.

[0067] S2: Continue to rotate the unlocking rocker arm 2 in the direction of releasing the parking state, wherein the angle of rotation of the unlocking rocker arm 2 is the second angle, the second angle is the angle of rotation of the parking shift shaft from the parking state to the released parking state, and the first angle is greater than the second angle;

[0068] After rotating the clearance angle, the engagement point of the unlocking adapter shaft 1 abuts against the flat groove surface 512 of the special vehicle shift shaft. The unlocking rocker arm 2 continues to rotate in the original direction, causing the unlocking adapter shaft 1 to drive the parking shift shaft 51 to rotate to the angular position where the parking mechanism 5 is in the released parking state. The angle rotated during this process is exactly the angle by which the parking shift shaft 51 rotates from the released parking state to the parking state.

[0069] S3: After troubleshooting the parking malfunction, rotate the shift rocker arm to its initial position and fix it.

[0070] Once the parking mechanism 5 has been repaired and is working properly again, rotate the shift rocker arm in the opposite direction to its initial position and use the elastic element 3 to fix the shift rocker arm to the reducer housing 4.

[0071] The above is a detailed description of the parking mechanism manual unlocking device 100, unlocking method, reducer and new energy vehicle provided in embodiments 1 to 4 of the present invention.

[0072] The above description is merely a specific embodiment of the present invention. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A manual unlocking device for a parking mechanism, characterized in that, include: The unlocking adapter shaft is provided with an unlocking through hole, which includes a first part in the shape of an arc and a second part for driving the parking shift shaft to rotate. The second part is provided with a first engagement point and a second engagement point. The angle between the first engagement point and the second engagement point in the rotation direction of the shift adapter shaft is greater than the angle at which the parking shift shaft rotates from the parking state to the released parking state. The unlocking rocker arm has one end connected to the unlocking pivot, and the other end extends away from the center of rotation of the unlocking pivot. The second part includes a first arc segment, a second arc segment, and a third arc segment connected in sequence. One end of the first part is connected to the first arc segment, and the other end is connected to the third arc segment. The arc length of the second arc segment is greater than the arc length of the first and third arc segments. The curvature of the second arc segment is less than the curvature of the first and third arc segments. The curvature of the first and third arc segments is less than the curvature of the first part. The first, second, and third arc segments are all concave in a direction away from the rotation center of the unlocking adapter shaft. The first engagement point is located at the junction of the first and second arc segments, and the second engagement point is located at the junction of the second and third arc segments.

2. The manual unlocking device for the parking mechanism according to claim 1, characterized in that, The unlocking rocker arm includes a connecting part and an extension part. The connecting part is annular and surrounds the outer wall of the unlocking adapter shaft and is connected to the unlocking adapter shaft.

3. The manual unlocking device for the parking mechanism according to claim 2, characterized in that, The unlocking adapter shaft is in the shape of a hollow cylinder. A groove is provided on the peripheral wall of the unlocking adapter shaft, recessed towards the axis of the connecting part. The groove includes a first side, a second side, a third side, a fourth side, a fifth side, and a sixth side connected in sequence. The first and third sides are parallel to the axis of the unlocking adapter shaft, the second and fifth sides are perpendicular to the first side, the angle between the fourth and third sides is greater than 90 degrees and less than 180 degrees, and the angle between the first and sixth sides is greater than 90 degrees and less than 180 degrees. A first arc-shaped groove and a second arc-shaped groove corresponding to the groove are provided on the inner wall of the connecting part. The portion where the first and sixth sides meet is located in the first arc-shaped groove, and the portion where the fourth and third sides meet is located in the second arc-shaped groove.

4. The manual unlocking device for the parking mechanism according to claim 2, characterized in that, The extension includes a first portion and a second portion. One end of the first portion is connected to the connecting portion, and the other end is connected to the second portion. The angle between the first portion and the connecting portion is an obtuse angle, and the angle between the second portion and the first portion is an obtuse angle.

5. The manual unlocking device for the parking mechanism according to claim 1, characterized in that, A rectangular through hole is provided at the end of the unlocking rocker arm away from the unlocking adapter shaft.

6. The manual unlocking device for the parking mechanism according to any one of claims 1 to 5, characterized in that, It also includes an elastic element, one end of which is rotatably connected to the rocker arm, and the other end of which is provided with an opening for fitting onto the limiting structure of the reducer housing.

7. A speed reducer, characterized in that, The reducer includes a housing, a parking mechanism, and a manual unlocking device for the parking mechanism according to any one of claims 1 to 6. The parking mechanism includes a parking shift shaft and a parking gear plate. The parking gear plate is connected to the parking shift shaft. The shift shaft is provided with an arc surface and a flat groove surface. The two ends of the arc surface are respectively connected to the two ends of the flat groove surface. The unlocking through hole of the manual unlocking device for the parking mechanism is sleeved on the shift shaft.

8. A new energy vehicle, characterized in that, Includes the speed reducer described in claim 7.

9. A manual unlocking method for the parking mechanism, characterized in that, Unlocking using the manual unlocking device of the parking mechanism as described in claim 1 includes the following steps: When the parking mechanism is in the parking state, the unlocking rocker arm is rotated from the initial position in the direction of releasing the parking state until the first engagement point abuts against the parking shift shaft, wherein the rotation angle of the unlocking rocker arm is the first angle; Continue to rotate the unlocking rocker arm in the direction of releasing the parking position. The angle at which the unlocking rocker arm rotates is the second angle, which is the angle at which the parking shift shaft rotates from the parking position to the released parking position. The first angle is greater than the second angle. After troubleshooting the parking malfunction, rotate the gear shift rocker arm back to its initial position and fix it in place.

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