A guide device with axial limit, parking mechanism and automobile

Abstract

A guiding device for a parking mechanism with axial limit, the parking mechanism comprising a parking pawl (5) and a parking fork (6), the guiding device comprising a parking bracket assembly (1) and a guiding block (2), the guiding block (2) being used for slidingly cooperating with an actuator (61) at one end of an axially movable parking fork (6) to realize relative rotation between the parking pawl (5) and a rotary shaft (4), the parking bracket assembly (1) being used for axially limiting the parking pawl (5) and guiding the parking fork (6), the parking bracket assembly (1) comprising a limiting portion (3), the limiting portion (3) being abutted against the guiding block (2), the limiting portion (3) being used for limiting the axial movement of the guiding block (2) when the actuator (61) at one end of the parking fork axially disengages from the guiding block (2). The guide device and the parking mechanism have the characteristics of simple structure and low cost. By optimizing the original parking mechanism bracket structure, the limiting part of the parking bracket presses the guide block to limit the axial displacement of the guide block, ensuring that the guide block will not interfere with the parking pawl, thereby avoiding the risk of failure of the pawl parking function.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to a guide device with axial limit, a parking mechanism and an automobile. Background Art

[0002] Modern cars are using electronics more and more widely, and with the help of high technology, automatic transmission models have been simplified. In order to allow automatic transmission models to limit the movement of the vehicle through gears like manual models, a P gear is set in the automatic transmission. The P gear mainly uses the pawl and ratchet in the parking mechanism as a locking mechanism and locking gear. The cooperation of the pawl and ratchet can directly fix the transmission output shaft connected to the wheel, and the wheel can be locked through the half shaft.

[0003] There are many types of transmissions and parking mechanisms on the market. For parking mechanisms with the same structure, the fixing forms of guide blocks are also varied. The main guide block fixing forms are mainly the following:

[0004] (1) The guide block is made into a special-shaped piece, positioned through the housing hole, and fixed to the housing by two bolts;

[0005] (2) The guide plate is made by stamping, and the housing hole groove is positioned and fixed to the housing by two bolts;

[0006] (3) The guide block of the rotating body is positioned through the housing hole, and the axial displacement of the guide block is limited by a pressure plate and two bolts;

[0007] (4) The guide block of the rotating body is positioned by the housing hole and the axial movement is limited by the interference fit between the housing hole and the outer circle of the guide block.

[0008] According to the overall layout of the transmission, the guide block is fixed in type (4). The advantage of this method is that it has low space requirements. The disadvantage is that the strength and rigidity of the housing have a great influence on the tightening force of the guide block. Due to the space constraints, the wall thickness and material strength of the guide block installation hole are not enough to meet the requirements of the harsh working conditions of the parking mechanism, resulting in the guide block falling out during the test.

[0009] In order to solve the problem of the guide block coming out and take into account the space and cost impact, it is necessary to provide a guide device with axial limit, a parking mechanism and a car. Summary of the invention

[0010] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a guide device and a parking mechanism with axial limit, which have the characteristics of simple structure and low cost. By optimizing the original parking mechanism bracket structure, the limit part of the parking bracket presses the guide block to limit the axial displacement of the guide block, ensuring that the guide block does not interfere with the parking pawl, thereby avoiding the risk of failure of the pawl parking function.

[0011] According to the axial limiting guide device of the embodiment of the present invention, the guide device is used for a parking mechanism, the parking mechanism includes a parking pawl and a parking fork, the guide device includes a parking bracket assembly and a guide block, the guide block is used to slide with the actuator at one end of the axially movable parking fork to realize the relative rotation of the parking pawl and the rotating shaft, the parking bracket assembly is used for axially limiting the parking pawl and guiding the parking fork, the parking bracket assembly includes a limiting portion, the limiting portion is abutted against the guide block, and the limiting portion is used to limit the axial movement of the guide block when the actuator at one end of the parking fork axially disengages from the guide block.

[0012] According to the axially limited guiding device of the embodiment of the present invention, the guiding block comprises a first guiding portion, the first guiding portion is provided with a supporting surface, and the limiting portion contacts the supporting surface.

[0013] According to the axial limiting guiding device of the embodiment of the present invention, a force-bearing surface is provided at one end of the limiting portion, and the force-bearing surface matches the supporting surface.

[0014] According to the axial limiting guide device of an embodiment of the present invention, the first guide portion is provided with a first guide surface, and there is no overlap between the projection of the limiting portion on the radial plane of the guide block and the projection of the first guide surface on the radial plane of the guide block.

[0015] According to the axial limiting guide device of an embodiment of the present invention, the guide block includes a second guide portion, the second guide portion is provided with a second guide surface, and the projection of the limiting portion on the radial plane of the guide block has no overlap with the projection of the second guide surface on the radial plane of the guide block.

[0016] According to the axially limiting guiding device of the embodiment of the present invention, the first guiding surface is in a sector ring shape, and a straight line where one of the side edges of the force-bearing surface is located is tangent to an outer ring edge of the first guiding surface.

[0017] According to the axially limited guiding device of the embodiment of the present invention, the width of the force-bearing surface is greater than or equal to the difference between the outer arc radius and the inner arc radius of the first guiding surface.

[0018] According to the axially limiting guiding device of the embodiment of the present invention, the longitudinal cross-section of the limiting portion is a fan-shaped shape.

[0019] According to the axial limiting guiding device of the embodiment of the present invention, the limiting portion is provided with a third guiding surface, the third guiding surface is perpendicular to the force-bearing surface, and the third guiding surface is used to guide the axial sliding of the execution rod.

[0020] According to the axial limiting guide device of the embodiment of the present invention, the parking bracket assembly further includes a parking bracket, and the parking bracket assembly having the limiting portion and the parking bracket is integrally formed.

[0021] According to the axial limiting guide device of the embodiment of the present invention, the parking bracket assembly further includes a parking bracket, and the parking bracket and the limiting portion are connected by welding.

[0022] The present invention also proposes a parking mechanism, comprising a shell, a rotating shaft, a parking pawl, a parking fork and a guide device with axial limitation as described above, the parking bracket and the shell are fixedly connected by bolts and two locating pins, the parking bracket is provided with a rotating shaft assembly hole, the parking pawl, the parking bracket and the parking fork are sequentially sleeved on the rotating shaft, a parking torsion spring for resetting the parking pawl is provided between the parking pawl and the rotating shaft, an actuator is provided at one end of the parking fork, and the parking fork realizes the sliding connection between the guide block and the parking pawl through the cooperation of the actuator and the guide block.

[0023] According to the parking mechanism of the embodiment of the present invention, the parking bracket is provided with an anti-rotation pin slot, the parking fork is provided with an anti-rotation pin, and the anti-rotation pin is slidably connected to the anti-rotation pin slot.

[0024] According to the parking mechanism of the embodiment of the present invention, the housing is provided with a guide block assembly hole, and the guide block is press-fitted into the guide block assembly hole by interference fit.

[0025] The present invention also provides a car, comprising any one of the parking mechanisms described above.

[0026] The automobile according to the embodiment of the present invention further includes a gripping handle, wherein the gripping handle is mounted on the main body panel.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 It is a structural schematic diagram of a guide device with axial limit provided by the present application;

[0030] Figure 2 It is a schematic diagram of the force-bearing surface in the guide device with axial limit provided by the present application;

[0031] Figure 3 It is a structural schematic diagram of the parking mechanism provided in this application.

[0032] Reference numerals:

[0033] Parking bracket assembly 1, parking bracket 11,

[0034] Guide block 2, first guide portion 21, first guide surface 211, support surface 212, second guide portion 22, second guide surface 221,

[0035] The limiting part 3, the force bearing surface 31, the third guide surface 32,

[0036] Rotating shaft 4 , parking pawl 5 , parking fork 6 , actuator 61 , anti-rotation pin 62 , parking torsion spring 7 . DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] The purpose of this specification is to provide a guide device and a parking mechanism with axial limit, which have the characteristics of simple structure and low cost. By optimizing the original parking mechanism bracket structure, the limiting part of the parking bracket presses the guide block to limit the axial displacement of the guide block, ensuring that the guide block will not interfere with the parking pawl, thereby avoiding the risk of failure of the pawl parking function.

[0039] In order to make the above-mentioned purposes, features and advantages of this specification more obvious and easy to understand, the following is a brief description of the present invention. Figure 1-Figure 3 The present application is further described in detail with specific implementation methods.

[0040] Embodiment 1:

[0041] In this embodiment, Figure 3As shown, a parking mechanism comprises a shell, a rotary shaft 4, a parking pawl 5, a parking fork 6 and the above-mentioned guide device with axial limit, a parking bracket 11 is fixedly connected to the shell by bolts and two locating pins, the parking bracket 11 is provided with a rotary shaft assembly hole, the parking pawl 5, the parking bracket 11 and the parking fork 6 are sequentially sleeved on the rotary shaft 4, a parking torsion spring 7 for resetting the parking pawl 5 is provided between the parking pawl 5 and the rotary shaft 4, an actuator 61 is provided at one end of the parking fork 6, and the parking fork realizes the sliding connection between the guide block 2 and the parking pawl 5 through the cooperation of the actuator 61 and the guide block 2.

[0042] The parking bracket 11 is provided with an anti-rotation pin slot, and the parking fork 6 is provided with an anti-rotation pin 62, and the anti-rotation pin 62 is slidably connected with the anti-rotation pin slot. The parking fork 6 prevents relative rotation between the parking fork 6 and the rotating shaft 4 through the cooperation between the anti-rotation pin 62 and the anti-rotation pin slot. The housing is provided with a guide block assembly hole, and the guide block 2 is press-fitted into the guide block assembly hole by interference fit.

[0043] The parking bracket 11 is installed on the housing by a bolt and two positioning pins. The rotary shaft 4 is supported by the transmission housing hole, the clutch housing hole and the parking bracket 11. Depending on the application, the parking bracket 11 can support the rotary shaft 4 or not. The rotary shaft 4 is axially limited by the parking bracket 11 and the bottom of the transmission housing hole. The parking fork 6 is sleeved on the rotary shaft 4 to play a supporting role. The anti-rotation pin 62 on the parking fork 6 is inserted into the anti-rotation pin assembly hole of the parking bracket 11 to play an anti-rotation role. The parking fork 6 is provided with an actuator 61, and the parking pawl 5 is provided with a guide sleeve for the actuator 61 to pass through. The guide sleeve is a structure that is concave inward and has a U-shaped surface. The parking fork 6 is slidably connected with the parking pawl 5 through the cooperation of the guide sleeve and the actuator 61, and the actuator 61 can slide stably along the guide sleeve. Under the action of the rotating shaft 4 and the parking bracket 11, the parking fork moves axially to achieve the P gear and the P gear. The parking pawl 5 is sleeved on the rotary shaft 4, and the axial displacement is limited by the shell end surface and the parking bracket 11. The guide block 2 is pressed into the shell hole by interference fit, and the limiting part 3 presses the guide block 2 to play the role of axial limiting.

[0044] like Figure 1 and Figure 2As shown, a guide device with axial limit is used for a parking mechanism, the parking mechanism includes a parking pawl 5 and a parking fork 6, the guide device includes a parking bracket assembly 1 and a guide block 2, the guide block 2 is used to slide with an actuator 61 at one end of the axially movable parking fork 6 to realize the relative rotation of the parking pawl 5 and the rotary shaft 4, the parking bracket assembly 1 is used for axial limit of the parking pawl 5 and for guiding the parking fork 6, the parking bracket assembly 1 includes a limit portion 3, the limit portion 3 is against the guide block 2, and the limit portion 3 is used to limit the axial movement of the guide block 2 when the actuator 61 at one end of the parking fork 6 axially disengages from the guide block 2. By optimizing the original parking mechanism bracket structure, the limit portion of the parking bracket presses the guide block to limit the axial displacement of the guide block, ensuring that the guide block does not interfere with the parking pawl, thereby avoiding the risk of failure of the pawl parking function.

[0045] The guide block 2 includes a first guide portion 21, the first guide portion 21 is provided with a support surface 212, and the limiting portion 3 is in contact with the support surface 212. A force-bearing surface 31 is provided at one end of the limiting portion 3, and the force-bearing surface 31 matches the support surface 212. Through the cooperation between the force-bearing surface 31 and the support surface 212, the force between the parking bracket 11 and the guide block 2 is made more reliable.

[0046] The first guide portion 21 is provided with a first guide surface 211, and there is no overlap between the projection of the limiting portion 3 on the radial plane of the guide block 2 and the projection of the first guide surface 211 on the radial plane of the guide block 2. The guide block 2 includes a second guide portion 22, and the second guide portion 22 is provided with a second guide surface 221, and there is no overlap between the projection of the limiting portion 3 on the radial plane of the guide block 2 and the projection of the second guide surface 221 on the radial plane of the guide block 2. The limiting portion 3 is provided on the supporting surface 212, and does not overlap with the first guide surface 211 of the first guide portion 21 and the second guide surface 221 of the second guide portion 22, so as to ensure that the limiting portion 3 acts as a pressure plate to press the guide block 2 while the guiding effect of the guide block 2 on the actuator 61 is not affected. Among them, the first guide surface 211 is a fan ring, and the straight line where one of the side edges of the force-bearing surface 31 is located is tangent to the outer ring edge of the first guide surface 211. Under the premise that the limiting portion 3 does not affect the guiding effect of the guide block 2, the force between the limiting portion 3 and the guide block 2 is more reliable.

[0047] The width of the force-bearing surface 31 is greater than or equal to the difference between the outer arc radius and the inner arc radius of the first guide surface 211. Under the premise that the guide block 2 remains unchanged, the contact area between the force-bearing surface 31 of the limiting part 3 and the supporting surface 212 of the guide block 2 is maximized, so that the force between the limiting part 3 and the guide block 2 is more reliable. In this embodiment, the force-bearing surface 31 is square, and the width of the force-bearing surface 31 is the length of the shorter side of the force-bearing surface. In other embodiments, the force-bearing surface may be non-square, and the width of the force-bearing surface 31 is the vertical distance between the two longer sides of the force-bearing surface.

[0048] In this embodiment, the longitudinal cross-section of the limit portion 3 is a fan-shaped shape. In other embodiments, the longitudinal cross-section of the limit portion 3 is an irregular shape composed of two curves and two short straight lines. The parking bracket assembly 1 also includes a parking bracket 11. The parking bracket assembly 1 having the limit portion 3 and the parking bracket 11 is integrally formed. On the basis of the original parking bracket 11, the parking bracket 11 can be lengthened and the lengthened part can be bent so that the parking bracket 11 can be used as a pressure plate to press the guide block 2 to limit the axial displacement of the guide block 2. By optimizing the bracket structure of the original parking mechanism, the same part can achieve two functions, avoiding the addition of a pressure plate and bolts, and avoiding the addition of bolt holes to the shell, thereby achieving the purpose of minimizing the cost of modification under the premise of modification. Since there are no new parts, there is no impact on the assembly process, the existing production line, and the production equipment. For the existing parking mechanism, the existing space layout, and the existing test problems, the modification is minimal, the impact is minimal, and the mass production reliability is high.

[0049] The main functions of the parking bracket assembly 1 in the parking mechanism are: supporting the rotating shaft 4; axially blocking the parking pawl 5, and playing the role of axially limiting the parking pawl 5; the anti-rotation pin 62 is installed in the parking fork 6 by interference fit, and the anti-rotation pin 62 is inserted in the anti-rotation pin slot of the parking bracket 11, playing the role of guiding the parking fork 6. In the process of engaging and disengaging the P gear, it is guided by the anti-rotation pin 62 and the anti-rotation pin slot of the parking bracket 11; the parking bracket 11 is extended and bent to form a limiting portion 3, and the guide block 2 is pressed by the limiting portion 3 to limit the axial displacement of the guide block 2.

[0050] Embodiment 2:

[0051] The difference between this embodiment and the first embodiment is that the limiting portion 3 is provided with a third guide surface 32. Figure 3As shown, a parking mechanism, a parking bracket 11 is installed on the housing by a bolt and two positioning pins, and the rotating shaft 4 is supported by the transmission housing hole, the clutch housing hole and the parking bracket 11. According to the application situation, the parking bracket 11 can support the rotating shaft 4 or not. The rotating shaft 4 is axially limited by the parking bracket 11 and the bottom of the transmission housing hole. The parking fork 6 is sleeved on the rotating shaft 4 to play a supporting role. The anti-rotation pin 62 on the parking fork 6 is inserted in the anti-rotation pin assembly hole of the parking bracket 11 to play an anti-rotation role. The parking fork 6 is provided with an actuator 61, and the parking pawl 5 is provided with a guide sleeve for the actuator 61 to pass through. The guide sleeve is a structure that is concave inward and has a U-shaped surface. The parking fork 6 is slidably connected with the parking pawl 5 through the cooperation of the guide sleeve and the actuator 61, and the actuator 61 can slide stably along the guide sleeve. Under the action of the rotating shaft 4 and the parking bracket 11, the parking fork moves axially to achieve the P gear and the P gear. The parking pawl 5 is sleeved on the rotary shaft 4, and the axial displacement is limited by the shell end surface and the parking bracket 11. The guide block 2 is pressed into the shell hole by interference fit, and the limiting part 3 presses the guide block 2 to play the role of axial limiting.

[0052] like Figure 1 and Figure 2 As shown, a guide device with axial limit is used for a parking mechanism, the parking mechanism includes a parking pawl 5 and a parking fork 6, the guide device includes a parking bracket assembly 1 and a guide block 2, the guide block 2 is used to slide with the actuator 61 at one end of the axially movable parking fork 6 to realize the relative rotation of the parking pawl 5 and the rotary shaft 4, the parking bracket assembly 1 is used for axial limit of the parking pawl 5 and for guiding the parking fork 6, the parking bracket assembly 1 includes a limit portion 3, the limit portion 3 is against the guide block 2, and the limit portion 3 is used to limit the axial movement of the guide block 2 when the actuator 61 at one end of the parking fork 6 axially disengages from the guide block 2. The limit portion 3 is provided with a third guide surface 32, the third guide surface 32 is perpendicular to the force surface 31, and the third guide surface 32 is used for guiding and limiting the axial sliding of the actuator 61.

[0053] The guide block 2 includes a first guide portion 21, the first guide portion 21 is provided with a support surface 212, and the limiting portion 3 is in contact with the support surface 212. A force-bearing surface 31 is provided at one end of the limiting portion 3, and the force-bearing surface 31 matches the support surface 212. Through the cooperation between the force-bearing surface 31 and the support surface 212, the force between the parking bracket 11 and the guide block 2 is made more reliable.

[0054] The first guide portion 21 is provided with a first guide surface 211, and there is no overlap between the projection of the limiting portion 3 on the radial plane of the guide block 2 and the projection of the first guide surface 211 on the radial plane of the guide block 2. The guide block 2 includes a second guide portion 22, and the second guide portion 22 is provided with a second guide surface 221, and there is no overlap between the projection of the limiting portion 3 on the radial plane of the guide block 2 and the projection of the second guide surface 221 on the radial plane of the guide block 2. The limiting portion 3 is provided on the supporting surface 212, and does not overlap with the first guide surface 211 of the first guide portion 21 and the second guide surface 221 of the second guide portion 22, so as to ensure that the limiting portion 3 acts as a pressure plate to press the guide block 2, while the guiding effect of the guide block 2 on the actuator 61 is not affected.

[0055] The width of the force-bearing surface 31 is greater than or equal to the difference between the outer arc radius and the inner arc radius of the first guide surface 211. Under the premise that the guide block 2 remains unchanged, the contact area between the force-bearing surface 31 of the limiting part 3 and the supporting surface 212 of the guide block 2 is maximized, so that the force between the limiting part 3 and the guide block 2 is more reliable. In this embodiment, the force-bearing surface 31 is square, and the width of the force-bearing surface 31 is the length of the shorter side of the force-bearing surface. In other embodiments, the force-bearing surface may be non-square, and the width of the force-bearing surface 31 is the vertical distance between the two longer sides of the force-bearing surface.

[0056] Embodiment 3:

[0057] The difference between this embodiment and the above embodiment is that the connection method between the parking bracket 11 and the limiting part 3 is different. Figure 3 As shown, a parking mechanism, a parking bracket 11 is installed on the housing by a bolt and two positioning pins, and the rotating shaft 4 is supported by the transmission housing hole, the clutch housing hole and the parking bracket 11. According to the application situation, the parking bracket 11 can support the rotating shaft 4 or not. The rotating shaft 4 is axially limited by the parking bracket 11 and the bottom of the transmission housing hole. The parking fork 6 is sleeved on the rotating shaft 4 to play a supporting role. The anti-rotation pin 62 on the parking fork 6 is inserted in the anti-rotation pin assembly hole of the parking bracket 11 to play an anti-rotation role. The parking fork 6 is provided with an actuator 61, and the parking pawl 5 is provided with a guide sleeve for the actuator 61 to pass through. The guide sleeve is a structure that is concave inward and has a U-shaped surface. The parking fork 6 is slidably connected with the parking pawl 5 through the cooperation of the guide sleeve and the actuator 61, and the actuator 61 can slide stably along the guide sleeve. Under the action of the rotating shaft 4 and the parking bracket 11, the parking fork moves axially to achieve the P gear and the P gear. The parking pawl 5 is sleeved on the rotary shaft 4, and the axial displacement is limited by the shell end surface and the parking bracket 11. The guide block 2 is pressed into the shell hole by interference fit, and the limiting part 3 presses the guide block 2 to play the role of axial limiting.

[0058] like Figure 1 and Figure 2As shown, a guide device with axial limit is used for a parking mechanism, the parking mechanism includes a parking pawl 5 and a parking fork 6, the guide device includes a parking bracket assembly 1 and a guide block 2, the guide block 2 is used to slide with the actuator 61 at one end of the axially movable parking fork 6 to realize the relative rotation of the parking pawl 5 and the rotating shaft 4, the parking bracket assembly 1 is used for axially limiting the parking pawl 5 and guiding the parking fork 6, the parking bracket assembly 1 includes a limit portion 3, the limit portion 3 is against the guide block 2, and the limit portion 3 is used to limit the axial movement of the guide block 2 when the actuator 61 at one end of the parking fork 6 axially disengages from the guide block 2.

[0059] The parking bracket assembly 1 also includes a parking bracket 11, and the parking bracket 11 is connected to the limiting part 3 by welding. On the basis of the original parking bracket, the limiting part 3 is welded to the parking bracket 11 for optimization, so that the same part can realize two functions, avoiding the addition of pressure plates and bolts, and avoiding the addition of bolt holes to the shell, thereby achieving the purpose of minimizing the cost of modification under the premise of modification. Since the newly added parts are only the limiting parts and no other parts are added, there is no impact on the assembly process, existing production lines, and production equipment. For the existing parking mechanism, existing space layout, and existing test problems, the modification is minimal, the impact is minimal, and the mass production reliability is high.

[0060] The guide block 2 includes a first guide portion 21, the first guide portion 21 is provided with a support surface 212, and the limiting portion 3 is in contact with the support surface 212. A force-bearing surface 31 is provided at one end of the limiting portion 3, and the force-bearing surface 31 matches the support surface 212. Through the cooperation between the force-bearing surface 31 and the support surface 212, the force between the parking bracket 11 and the guide block 2 is made more reliable.

[0061] The first guide portion 21 is provided with a first guide surface 211, and there is no overlap between the projection of the limiting portion 3 on the radial plane of the guide block 2 and the projection of the first guide surface 211 on the radial plane of the guide block 2. The guide block 2 includes a second guide portion 22, and the second guide portion 22 is provided with a second guide surface 221, and there is no overlap between the projection of the limiting portion 3 on the radial plane of the guide block 2 and the projection of the second guide surface 221 on the radial plane of the guide block 2. The limiting portion 3 is provided on the supporting surface 212, and does not overlap with the first guide surface 211 of the first guide portion 21 and the second guide surface 221 of the second guide portion 22, so as to ensure that the limiting portion 3 acts as a pressure plate to press the guide block 2, while the guiding effect of the guide block 2 on the actuator 61 is not affected.

[0062] The width of the force-bearing surface 31 is greater than or equal to the difference between the outer arc radius and the inner arc radius of the first guide surface 211. Under the premise that the guide block 2 remains unchanged, the contact area between the force-bearing surface 31 of the limiting part 3 and the supporting surface 212 of the guide block 2 is maximized, so that the force between the limiting part 3 and the guide block 2 is more reliable. In this embodiment, the force-bearing surface 31 is square, and the width of the force-bearing surface 31 is the length of the shorter side of the force-bearing surface. In other embodiments, the force-bearing surface may be non-square, and the width of the force-bearing surface 31 is the vertical distance between the two longer sides of the force-bearing surface.

[0063] The working principle of this application is:

[0064] 1) The parking bracket 11 is installed on the housing through a bolt and two positioning pins. The rotating shaft 4 is supported by the transmission housing hole, the clutch housing hole and the parking bracket 11. Depending on the application, the parking bracket 11 can support the rotating shaft 4 or not. The rotating shaft 4 is axially limited by the parking bracket 11 and the bottom of the transmission housing hole. The parking fork 6 is mounted on the rotating shaft 4 to play a supporting role. The anti-rotation pin 62 on the parking fork 6 is inserted in the anti-rotation pin assembly hole of the parking bracket 11 to play an anti-rotation role. Under the action of the rotating shaft 4 and the parking bracket 11, the parking fork moves axially to achieve the P gear engagement and disengagement. The parking pawl 5 is mounted on the rotating shaft 4, and the axial displacement is limited by the housing end face and the parking bracket 11. The guide block 2 is pressed into the housing hole by interference fit, and the limiting part 3 presses the guide block 2 to play an axial limiting role.

[0065] 2) The parking fork 6 is provided with an actuator 61, and the parking pawl 5 is provided with a guide sleeve for the actuator 61 to pass through. The guide sleeve is a structure that is recessed inward and has a U-shaped surface. The parking fork 6 is slidably connected to the parking pawl 5 through the cooperation of the guide sleeve and the actuator 61, and the actuator 61 can slide stably along the guide sleeve.

[0066] 3) When the P gear is engaged, the parking fork 6 moves axially, and the actuator 61 is guided and limited by the first guide portion 21 of the guide block 2, inserted into the slot in the middle of the guide block 2, and during the movement, the parking pawl 5 slides relative to the guide sleeve of the parking fork 6, and is guided by the second guide portion 22 of the guide block 2. The parking pawl 5 rotates relative to the rotary shaft 4 in a direction away from the guide block 2, thereby achieving the engagement of the gear; when the P gear is disengaged, the actuator 61 moves away from the guide block, and the parking pawl 5 is guided by the pawl torsion spring 7 and the second guide portion 22 of the guide block 2, so that it rotates in a direction close to the guide block 2 and returns to its original position, thereby achieving the disengagement of the P gear.

[0067] According to the above specific embodiments, the present application has the following technical effects:

[0068] 1) The guide device and parking mechanism with axial limit provided in this specification have a simple structure. By optimizing the original parking mechanism bracket structure, the limit part of the parking bracket presses the guide block to limit the axial displacement of the guide block, ensuring that the guide block does not interfere with the parking pawl, thereby avoiding the risk of failure of the pawl parking function;

[0069] 2) By optimizing the bracket structure of the original parking mechanism, the same part can realize two functions, avoiding the need to add a new pressure plate, bolts, or bolt holes to the housing, thereby achieving the goal of minimizing the cost of modification under the premise of modification;

[0070] 3) Since there are no new parts, there is no impact on the assembly process, existing production lines, and production equipment. For existing parking mechanisms, existing space layouts, and existing test problems, the changes and impacts are minimal, and the mass production reliability is high.

[0071] 1. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0072] 2. In the description of the present invention, "first feature" and "second feature" may include one or more of these features.

[0073] 3. In the description of the present invention, "plurality" means two or more.

[0074] 4. In the description of the present invention, a first feature “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0075] 5. In the description of the present invention, “above”, “above” and “on” a first feature of a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0077] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A guide device with axial limit, characterized in that: The guide device is used for a parking mechanism, the parking mechanism comprises a parking pawl (5) and a parking fork (6), the guide device comprises a parking bracket assembly (1) and a guide block (2), the guide block (2) is used to slide with an actuator (61) at one end of the axially movable parking fork (6) to realize relative rotation between the parking pawl (5) and the rotary shaft (4), the parking bracket assembly (1) is used for axially limiting the parking pawl (5) and guiding the parking fork (6), the parking bracket assembly (1) comprises a limiting portion (3), the limiting portion (3) abuts against the guide block (2), and the limiting portion (3) is used to limit the axial movement of the guide block (2) when the actuator (61) at one end of the parking fork (6) axially disengages from the guide block (2).

2. A guide device with axial limit according to claim 1, characterized in that: The guide block (2) comprises a first guide portion (21), the first guide portion (21) being provided with a support surface (212), and the limiting portion (3) being in contact with the support surface (212).

3. A guide device with axial limit according to claim 2, characterized in that: A force-bearing surface (31) is provided at one end of the limiting portion (3), and the force-bearing surface (31) matches the supporting surface (212).

4. A guide device with axial limit according to claim 3, characterized in that: The first guide portion (21) is provided with a first guide surface (211), and there is no overlap between the projection of the limiting portion (3) on the radial plane of the guide block (2) and the projection of the first guide surface (211) on the radial plane of the guide block (2).

5. The guide device with axial limit according to claim 1, characterized in that: The guide block (2) comprises a second guide portion (22), the second guide portion (22) is provided with a second guide surface (221), and the projection of the limiting portion (3) on the radial plane of the guide block (2) and the projection of the second guide surface (221) on the radial plane of the guide block (2) do not overlap.

6. The guide device with axial limit according to claim 4, characterized in that: The first guide surface (211) is in the shape of a sector ring, and a straight line on which one of the side edges of the force-bearing surface (31) is located is tangent to the outer ring edge of the first guide surface (211).

7. The guide device with axial limit according to claim 6, characterized in that: The width of the force-bearing surface (31) is greater than or equal to the difference between the outer arc radius and the inner arc radius of the first guide surface (211).

8. The guide device with axial limit according to claim 1, characterized in that: The longitudinal cross section of the limiting portion (3) is in the shape of a sector ring.

9. The guide device with axial limit according to claim 6, characterized in that: The limiting portion (3) is provided with a third guide surface (32), the third guide surface (32) is perpendicular to the force-bearing surface (31), and the third guide surface (32) is used to guide the axial sliding of the execution rod.

10. The guide device with axial limit according to claim 1, characterized in that: The parking bracket assembly (1) further comprises a parking bracket (11), and the parking bracket assembly (1) comprising a limiting portion (3) and the parking bracket (11) is integrally formed.

11. The guide device with axial limit according to claim 1, characterized in that: The parking bracket assembly (1) further comprises a parking bracket (11), and the parking bracket (11) is connected to the limiting portion (3) by welding.

12. A parking mechanism, characterized in that: The invention comprises a shell, a rotary shaft (4), a parking pawl (5), a parking fork (6) and a guide device with axial limit as described in any one of claims 1 to 11, wherein the parking bracket (11) is fixedly connected to the shell by bolts and two locating pins, the parking bracket (11) is provided with a rotary shaft assembly hole, the parking pawl (5), the parking bracket (11) and the parking fork (6) are sequentially sleeved on the rotary shaft (4), a parking torsion spring (7) for resetting the parking pawl (5) is provided between the parking pawl (5) and the rotary shaft (4), an actuator (61) is provided at one end of the parking fork (6), and the parking fork (6) realizes the sliding connection between the guide block (2) and the parking pawl (5) through the cooperation of the actuator (61) and the guide block (2).

13. A parking mechanism according to claim 12, characterized in that: The parking bracket (11) is provided with an anti-rotation pin slot, and the parking fork (6) is provided with an anti-rotation pin (62), and the anti-rotation pin (62) is slidably connected to the anti-rotation pin slot.

14. The parking mechanism according to claim 12, characterized in that: The shell is provided with a guide block assembly hole, and the guide block (2) is pressed into the guide block assembly hole through interference fit.

15. A car, characterized in that: It comprises a parking mechanism as described in any one of claims 12-14.

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