Parking structure assembly process and gearbox using the same

Abstract

The present disclosure relates to the technical field of gearboxes, and particularly relates to a parking structure assembly process and a gearbox using the same. The parking structure assembly process comprises the following steps: S1, installing a piston on a housing through a circumferential limiting structure; S2, installing a parking gear in the piston; S3, setting a pawl in mesh with the parking gear through an avoiding hole on the sidewall of the piston; S4, installing the pawl on the housing through a pawl pin. The parking structure assembly process can effectively shorten the axial space occupied by the whole parking structure, and can also avoid the interference between the piston, the parking gear and the pawl, and can make the assembly of the pawl more convenient and provide more space for the pawl, thereby significantly improving the assembly efficiency of the whole parking structure; the circumferential limiting structure between the piston and the housing can prevent the piston from rotating and prevent the avoiding hole from being displaced, thereby further improving the reliability of the parking structure.

Description

Technical Field

[0001] This disclosure relates to the field of transmission technology, and more particularly to a parking structure assembly process and a transmission using the process. Background Technology

[0002] A car transmission is a gearbox that coordinates the engine speed and the actual speed of the wheels to optimize engine performance. During vehicle operation, the transmission can create different gear ratios between the engine and wheels, enabling the transmission of different engine speeds.

[0003] There are two types of transmissions: manual and automatic. Manual transmissions are mainly composed of gears and shafts, and different gear combinations produce speed and torque changes. Automatic transmissions (AT) are composed of a torque converter, planetary gears, and a hydraulic control system, and achieve speed and torque changes through hydraulic transmission and gear combinations.

[0004] Automatic transmissions, with their advantages of improved driving comfort and reduced driver fatigue, have become a popular trend in modern car configurations. They utilize planetary gear mechanisms for gear shifting, automatically changing gears based on accelerator pedal pressure and vehicle speed. Drivers only need to operate the accelerator pedal to control speed, allowing them to focus entirely on the road without the hassle of manual shifting.

[0005] Currently, during the assembly of the parking mechanism inside an automatic transmission, the pawl and parking teeth often interfere with the adjacent piston structure, affecting the assembly efficiency of the entire transmission. Summary of the Invention

[0006] To address the aforementioned technical problems, this disclosure provides a parking structure assembly process and a gearbox using this process.

[0007] In a first aspect, this disclosure provides a parking structure assembly process, including the following steps:

[0008] S1. Install the piston on the housing using a circumferential limiting structure;

[0009] S2. Install the parking gear inside the piston;

[0010] S3. The pawl is inserted through the clearance hole on the piston side wall and engaged with the parking gear;

[0011] S4. Install the pawl onto the housing using the pawl pin.

[0012] Optionally, the circumferential limiting structure in S1 includes a protrusion disposed on the outer wall of the piston and a groove disposed on the inner wall of the housing, wherein the protrusion slides in engagement with the groove along the axial direction of the piston.

[0013] Optionally, the two end faces of the protrusion along the circumference of the piston are at a set angle to the outer wall of the piston, and the two end faces of the groove are arranged parallel to the two end faces of the protrusion.

[0014] Optionally, the width of the bump matches the width of the groove.

[0015] Optionally, the piston may be thickened at the sidewall where the clearance hole is formed.

[0016] Optionally, the piston is provided with a connecting ring, and the housing is provided with an annular groove that slides with the connecting ring; the connecting ring is inserted into the annular groove along its axial direction.

[0017] Optionally, the connecting ring is sealed to the annular groove via a sealing ring.

[0018] Optionally, the housing needs to be fixed before step S1.

[0019] Optionally, between S2 and S3, the parking gear needs to be rotated by a certain angle so that the pawl can engage with the parking gear after passing through the clearance hole.

[0020] Secondly, this disclosure provides a gearbox utilizing the parking structure assembly process described above, the gearbox comprising: a piston, a housing, parking gears, and a ratchet pawl;

[0021] The piston is mounted on the housing via a circumferential limiting structure;

[0022] The parking gear is coaxially rotatably disposed inside the piston, and the pawl is rotatably disposed on the housing. The pawl has a locking position and an unlocking position. In the locking position, the pawl engages with the parking gear, and in the unlocking position, the pawl separates from the parking gear.

[0023] The piston has a clearance hole for avoiding the ratchet.

[0024] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0025] The parking structure assembly process disclosed herein can effectively shorten the axial space occupied by the entire parking structure by setting clearance holes on the side wall of the piston, and can also avoid interference between the piston and the parking teeth and pawl. It can also make the assembly of the pawl more convenient, provide more room for the pawl to move, and significantly improve the assembly efficiency of the entire parking structure. The circumferential limiting structure between the piston and the housing can prevent the piston from rotating and prevent the clearance holes from shifting, further improving the reliability of the parking structure. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0027] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a flowchart of the parking structure assembly process described in the embodiments of this disclosure;

[0029] Figure 2 This is a schematic diagram of the parking structure described in an embodiment of the present disclosure;

[0030] Figure 3 This is a cross-sectional view of the parking structure described in an embodiment of this disclosure.

[0031] Among them, 1. Piston; 11. Clearance hole; 12. Connecting ring; 2. Housing; 21. Annular groove; 3. Parking gear; 4. Pawl; 41. Pawl pin; 51. Protrusion; 52. Groove; 6. Sealing ring. Detailed Implementation

[0032] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0033] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0034] A car transmission is a gearbox that coordinates the engine speed and the actual speed of the wheels to optimize engine performance. During vehicle operation, the transmission can create different gear ratios between the engine and wheels, enabling the transmission of different engine speeds.

[0035] There are two types of transmissions: manual and automatic. Manual transmissions are mainly composed of gears and shafts, and different gear combinations produce speed and torque changes. Automatic transmissions (AT) are composed of a torque converter, planetary gears, and a hydraulic control system, and achieve speed and torque changes through hydraulic transmission and gear combinations.

[0036] Automatic transmissions, with their advantages of improved driving comfort and reduced driver fatigue, have become a popular trend in modern car configurations. They utilize planetary gear mechanisms for gear shifting, automatically changing gears based on accelerator pedal pressure and vehicle speed. Drivers only need to operate the accelerator pedal to control speed, allowing them to focus entirely on the road without the hassle of manual shifting.

[0037] Currently, during the assembly of the parking mechanism inside an automatic transmission, the pawl and parking teeth often interfere with the adjacent piston structure, affecting the assembly efficiency of the entire transmission.

[0038] Based on this, this embodiment provides a parking structure assembly process and a gearbox using this process. By providing clearance holes on the side wall of the piston, the axial space occupied by the entire parking structure can be effectively shortened, and interference between the piston and the parking gear and pawl can be avoided. This also makes pawl assembly easier, providing more room for movement and significantly improving the assembly efficiency of the entire parking structure. Furthermore, the circumferential limiting structure between the piston and the housing prevents piston rotation and displacement of the clearance holes, further improving the reliability of the parking structure. The following detailed description uses specific embodiments:

[0039] Reference Figures 1 to 3 As shown, the parking structure assembly process provided in this embodiment includes the following steps: S1, the piston 1 is installed on the housing 2 through the circumferential limiting structure; S2, the parking gear 3 is installed inside the piston 1; S3, the pawl 4 is passed through the clearance hole 11 on the side wall of the piston 1 and engaged with the parking gear 3; S4, the pawl 4 is installed on the housing 2 through the pawl pin 41.

[0040] By providing clearance holes 11 on the side wall of piston 1, the axial space occupied by the entire parking structure can be effectively shortened, and interference between piston 1 and parking gear 3 and pawl 4 can be avoided. It is also more convenient to assemble pawl 4, providing more room for pawl 4 to move, and significantly improving the assembly efficiency of the entire parking structure. The circumferential limiting structure between piston 1 and housing 2 can prevent piston 1 from rotating and prevent the clearance holes 11 from shifting, further improving the reliability of the parking structure.

[0041] In some embodiments, the circumferential limiting structure in S1 includes a protrusion 51 provided on the outer wall of the piston 1 and a groove 52 provided on the inner wall of the housing 2. The protrusion 51 slides in cooperation with the groove 52 along the axial direction of the piston 1. It should be noted that the groove 52 can also be provided on the outer wall of the piston 1 and the protrusion 51 can be provided on the inner wall of the housing 2, as long as it can be ensured that the piston 1 cannot rotate circumferentially within the housing 2.

[0042] In a further embodiment, both ends of the protrusion 51 along the circumference of the piston 1 are at a set angle to the outer wall of the piston 1, and the two ends of the groove 52 are arranged parallel to the two ends of the protrusion 51. The two ends of the protrusion 51 can be perpendicular to the outer wall of the piston 1, which can ensure a better circumferential limiting effect between the protrusion 51 and the groove 52, and the entire limiting structure is more stable and reliable.

[0043] In some embodiments, the width of the protrusion 51 matches the width of the groove 52. It should be understood that the protrusion 51 and the groove 52 can be in clearance fit, as long as it does not affect the axial movement of the piston 1 while reducing the amount of swaying of the piston 1 in the circumferential direction; such a setting can further improve the connection stability between the piston 1 and the housing 2.

[0044] Continue to refer to Figure 2 As shown, the piston 1 has a thickened side wall at the opening of the clearance hole 11. It should be understood that the clearance hole 11 is thickened on all sides. This setting can enhance the structural strength of the clearance hole 11, reduce the negative impact of opening the clearance hole 11, and ensure the structural stability of the piston 1.

[0045] Continue to refer to Figure 3 As shown, the piston 1 is provided with a connecting ring 12, and the housing 2 is provided with an annular groove 21 that slides with the connecting ring 12; the connecting ring 12 is inserted into the annular groove 21 along its axial direction; when the piston 1 is installed on the housing 2, the connecting ring 12 is inserted into the annular groove 21; the insertion and cooperation of the two can form a guiding and limiting effect.

[0046] In some embodiments, the connecting ring 12 is sealed to the annular groove 21 by the sealing ring 6; the sealing ring 6 seals the connection between the connecting ring 12 and the annular groove 21, which can play a certain guiding role when the oil cavity is filled with oil.

[0047] In some embodiments, the housing 2 needs to be fixed before S1; this makes it more stable when installing the piston 1 onto the housing 2 and when adjusting the angle of the parking gear 3, thereby improving the assembly efficiency of the entire parking structure.

[0048] In a further embodiment, between S2 and S3, the parking gear 3 needs to be rotated by a certain angle so that the pawl 4 can engage with the parking gear 3 after passing through the clearance hole 11. Since the pawl 4 and the shaft of the housing 2 are fixed, the parking gear 3 needs to be adjusted to an angle that can engage with the pawl 4 before installing the pawl 4. This way, the teeth on the parking gear 3 can be prevented from affecting the installation of the pawl 4.

[0049] Secondly, this disclosure provides a gearbox using the above-described parking structure assembly process. The gearbox includes: a piston 1, a housing 2, a parking gear 3, and a pawl 4. The piston 1 is mounted on the housing 2 via a circumferential limiting structure. The parking gear 3 is coaxially rotatably disposed within the piston 1, and the pawl 4 is rotatably disposed on the housing 2. The pawl 4 has a locking position and an unlocking position. In the locking position, the pawl 4 engages with the parking gear 3, and in the unlocking position, the pawl 4 separates from the parking gear 3. An clearance hole 11 is provided on the piston 1 to allow the pawl 4 to pass.

[0050] The specific implementation method and principle are the same as those in the above embodiments, and can bring the same or similar technical effects. They will not be repeated here. For details, please refer to the description of the above parking structure assembly process embodiments.

[0051] 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, and do not necessarily require or imply any such actual relationship or order between these entities or operations. 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. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A parking structure assembly process, characterized in that, Includes the following steps: S1. The piston (1) is mounted on the housing (2) by means of a circumferential limiting structure. The circumferential limiting structure includes a protrusion (51) on the outer wall of the piston (1) and a groove (52) on the inner wall of the housing (2). The protrusion (51) slides in cooperation with the groove (52) along the axial direction of the piston (1). S2. Install the parking gear (3) inside the piston (1); S3. The pawl (4) is passed through the clearance hole (11) on the side wall of the piston (1) and engaged with the parking gear (3); S4. Install the pawl (4) onto the housing (2) via the pawl pin (41); The piston (1) is provided with a connecting ring (12), and the housing (2) is provided with an annular groove (21) that slides with the connecting ring (12); the connecting ring (12) is inserted into the annular groove (21) along its axial direction.

2. The parking structure assembly process according to claim 1, characterized in that, The two ends of the protrusion (51) along the circumference of the piston (1) are at a set angle to the outer wall of the piston (1), and the two ends of the groove (52) are arranged parallel to the two ends of the protrusion (51).

3. The parking structure assembly process according to claim 2, characterized in that, The width of the protrusion (51) matches the width of the groove (52).

4. The parking structure assembly process according to claim 1, characterized in that, The piston (1) is thickened at the side wall where the clearance hole (11) is opened.

5. The parking structure assembly process according to claim 1, characterized in that, The connecting ring (12) is sealed to the annular groove (21) by a sealing ring (6).

6. The parking structure assembly process according to claim 1, characterized in that, Before S1, the housing (2) needs to be fixed first.

7. The parking structure assembly process according to claim 1, characterized in that, Between S2 and S3, the parking tooth (3) needs to be rotated by a certain angle so that the pawl (4) can mesh with the parking tooth (3) after passing through the clearance hole (11).

8. A gearbox utilizing the parking structure assembly process as described in any one of claims 1 to 7, characterized in that, The gearbox includes: piston (1), housing (2), parking gear (3) and pawl (4); The piston (1) is mounted on the housing (2) by a circumferential limiting structure; The parking gear (3) is coaxially rotatably disposed inside the piston (1), and the pawl (4) is rotatably disposed on the housing (2). The pawl (4) has a locking position and an unlocking position. In the locking position, the pawl (4) engages with the parking gear (3), and in the unlocking position, the pawl (4) separates from the parking gear (3). The piston (1) is provided with a clearance hole (11), which is used to avoid the pawl (4).

Images