A transmission main shaft rear end limiting structure

Abstract

The invention discloses a transmission main shaft rear end limiting structure, which belongs to the technical field of automobile transmission main shaft, including a main shaft and a gear sleeved on the rear end of the main shaft and limited in circumferential rotation with the rear end of the main shaft, a shaft shoulder capable of abutting against the front side of the gear is provided on the main shaft, a limiting groove is provided at the rear end of the main shaft, at least two arc-shaped fixed baffles are clamped in the limiting groove, the front side of the fixed baffles abuts against the rear side of the gear for limiting; an annular locking ring is sleeved on the outer side of the fixed baffle, and a retaining spring capable of axially limiting the annular locking ring is clamped on the gear. A plurality of arc-shaped fixed baffles are clamped with the limiting groove at the rear end of the main shaft, the fixed baffle set is radially limited by the annular locking ring, and the annular locking ring is axially limited by the retaining spring, so that the plurality of fixed baffles are firmly clamped in the limiting groove, which can not only ensure reliable axial limiting of the gear and the main shaft, can withstand large axial force, but also ensure the convenience of disassembly and assembly of the fixed baffles, saving time and labor.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile transmission main shafts, in particular to a transmission main shaft rear end limiting structure. Background Art

[0002] Automobile transmission is a set of speed-changing devices used to coordinate the engine speed and the actual driving speed of the wheels, so as to bring out the best performance of the engine. The transmission can produce different speed ratios between the engine and the wheels during the driving process of the car. The functions of automobile transmission are: 1. Change the transmission ratio and expand the range of change of the torque and speed of the driving wheel to adapt to the frequently changing driving conditions, while making the engine work under favorable conditions (higher power and lower fuel consumption); 2. Make the car go backwards without changing the direction of engine rotation; 3. Use neutral gear to interrupt power transmission so that the engine can start and idle, and facilitate transmission shifting or power output.

[0003] The transmission main shaft is one of the most important parts in an automobile transmission. The structural stability of the transmission main shaft is related to whether the transmission and even the entire vehicle can operate stably.

[0004] At present, the rear end limit of the traditional transmission main shaft is basically limited by a retaining spring. This type of transmission main shaft rear end limit structure is easy to cause the retaining spring to fall out when there is a large axial force, resulting in transmission failure and high operating instability. In order to make the retaining spring able to withstand a large axial force (not easy to fall out), some solutions adopt the form of increasing the thickness of the retaining spring, which makes it difficult to install and remove the retaining spring. The easy fall-out of the retaining spring and the difficulty of removing and installing the retaining spring cannot be overcome at the same time. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a limiting structure at the rear end of the transmission main shaft, which adopts multiple arc-shaped fixed baffles to engage with the limiting groove at the rear end of the main shaft, and radially limit the fixed baffle set through an annular locking ring, and axially limit the annular locking ring through a retaining spring, so that the multiple fixed baffles are firmly clamped in the limiting groove, which can not only ensure reliable axial limitation of the gears and the main shaft and withstand large axial forces, but also ensure the convenience of disassembly and assembly of the fixed baffles, saving time and effort.

[0006] The present invention is achieved through the following technical solutions:

[0007] A transmission main shaft rear end limiting structure comprises a main shaft and a gear which is sleeved on the rear end of the main shaft and limited in circumferential rotation with the rear end of the main shaft, the main shaft is provided with a shaft shoulder which can abut against the front side of the gear, a limiting groove is provided at the rear end of the main shaft, at least two arc-shaped fixed baffles are clamped in the limiting groove, the front side of the fixed baffles abuts against the rear side of the gear for limiting position; an annular locking ring is sleeved on the outer side of the fixed baffle, and a retaining spring which can axially limit the annular locking ring is clamped on the gear.

[0008] A further improvement of the present invention is that the fixed baffles are in an equally divided arc structure, and there is a gap between the end faces of adjacent fixed baffles.

[0009] A further improvement of the present invention is that a gap is left between the inner side of the annular locking ring and the outer side of the fixed blocking piece.

[0010] A further improvement of the present invention is that the width-to-thickness ratio of the fixed baffle is less than 1:1.

[0011] A further improvement of the present invention is that the thickness of the annular locking ring is greater than the thickness of the fixed blocking piece.

[0012] A further improvement of the present invention is that the front side of the annular lock ring abuts against the rear side of the gear, and the rear side of the annular lock ring is abutted and limited by a retaining spring.

[0013] A further improvement of the present invention is that a slot for mounting the retaining ring is provided on the gear.

[0014] A further improvement of the present invention is that there are two fixed baffles, each of which is a semicircular arc structure.

[0015] A further improvement of the present invention is that the rear end of the main shaft is a spline structure, and a keyway matching the spline structure is provided in the gear mounting hole.

[0016] It can be seen from the above technical solutions that the beneficial effects of the present invention are:

[0017] The overall structure is simple, easy to implement and practical. A plurality of arc-shaped fixed baffles are engaged with the limit groove at the rear end of the main shaft, and the plurality of fixed baffles are radially limited by an annular lock ring to prevent the fixed baffles from falling out of the limit groove, and the annular lock ring is axially limited by a retaining spring, so that the plurality of fixed baffles are securely mounted in the limit groove, which can ensure reliable axial limitation of the gear and the main shaft, withstand large axial forces, and ensure the convenience of disassembly and assembly of the fixed baffles, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0020] Figure 2 It is an axial schematic diagram of a fixed baffle, an annular locking ring and a retaining spring according to a specific embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the installation of the fixed baffle and the main shaft according to a specific embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of the fixed baffle structure of a specific implementation mode of the present invention.

[0023] In the attached figure: 1. fixed baffle, 2. annular locking ring, 3. retaining ring, 4. main shaft, 5. gear. DETAILED DESCRIPTION

[0024] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0025] like Figure 1-3 As shown, the present invention discloses a transmission main shaft rear end limiting structure, comprising a main shaft 4 and a gear 5 which is sleeved on the rear end of the main shaft 4 and limited in circumferential rotation with the rear end of the main shaft 4, the gear 5 has a mounting hole, and the mounting hole of the gear 5 is sleeved with the rear end of the main shaft 4; a shaft shoulder which can abut against the front side of the gear 5 (the front end of the mounting hole) is provided on the main shaft 4, a limiting groove is provided at the rear end of the main shaft 4, at least two arc-shaped fixed baffles 1 are clamped in the limiting groove, the front side of the fixed baffle 1 abuts against the rear side of the gear 5 for limiting, the thickness of the fixed baffle 1 is adapted to the width of the limiting groove, and a clearance fit can be adopted, which not only ensures the convenience of disassembly and assembly of the fixed baffle 1, but also ensures that the fixed baffle 1 can axially limit the rear end of the main shaft 4; an annular locking ring 2 is sleeved on the outer side of the fixed baffle 1, and a retaining spring 3 which can axially limit the annular locking ring 2 is clamped on the gear 5.

[0026] A plurality of arc-shaped fixed baffles 1 are engaged with the limiting groove at the rear end of the main shaft 4, and the plurality of fixed baffles 1 are radially limited by the annular lock ring 2 to prevent the fixed baffles 1 from falling out of the limiting groove, and the annular lock ring 2 is axially limited by the retaining spring 3, so that the plurality of fixed baffles 1 are firmly clamped in the limiting groove, which can ensure reliable axial limitation of the gear 5 and the main shaft 4, can withstand large axial force, and can ensure the convenience of disassembly and assembly of the fixed baffles 1, saving time and effort. The overall structure is simple, easy to implement, and practical.

[0027] The fixed baffles 1 are equally divided arc structures, and there are gaps between the end faces of adjacent fixed baffles 1. Multiple fixed baffles 1 are clamped in the limiting groove to form an annular structure with gaps, ensuring the tightness of the clamping installation with the limiting groove, and through the outer annular lock ring 2, reliable axial limitation of the gear 5 and the main shaft 4 is achieved.

[0028] There is a gap between the inner side of the annular locking ring 2 and the outer side of the fixed baffle 1. This ensures that there is no axial force transmission between the fixed baffle 1 and the annular locking ring 2, and the axial force borne by the retaining spring 3 for limiting the annular locking ring 2 is very small, which effectively avoids the risk of the retaining spring 3 coming out and ensures the stability of the structure.

[0029] The width-to-thickness ratio of the fixed baffle 1 is less than 1: 1. The fixed baffle 1 has a relatively large thickness and can be designed according to the magnitude of the axial force, so that the fixed baffle 1 can withstand a relatively large axial force, achieving flexibility and reliability in use.

[0030] The thickness of the annular lock ring 2 is slightly greater than that of the fixed baffle 1, the front side of the annular lock ring 2 abuts against the rear side of the gear 5, the rear side of the annular lock ring 2 is abutted and limited by the retaining spring 3, and the gear 5 is provided with a slot for mounting the retaining spring 3. The retaining spring 3 is mounted through the retaining groove on the gear 5, and the retaining spring 3 abuts and limits the rear side of the annular lock ring 2. The front sides of the annular lock ring 2 and the fixed baffle 1 abut against the rear end of the mounting hole of the gear 5, ensuring that the retaining spring 3 does not contact the rear side of the fixed baffle 1, and only abuts and limits the annular lock ring 2, effectively avoiding the risk of the retaining spring 3 being dislodged due to a large axial force.

[0031] There are two fixed baffles 1, each of which is a semicircular arc structure, which not only ensures the integrity of the fixed baffles 1 after buckling and installation, ensures reliable axial limitation of the gear 5 and the main shaft 4, but also enables convenient disassembly and assembly of the fixed baffles 1, saving time and effort.

[0032] The rear end of the main shaft 4 is a spline structure, and a keyway that cooperates with the spline structure is provided in the mounting hole of the gear 5. The spline structure on the main shaft 4 cooperates with the keyway of the mounting hole of the gear 5 to achieve reliable circumferential rotation limitation of the two.

[0033] The transmission main shaft rear end limiting structure adopts multiple arc-shaped fixed baffles 1 to engage with the limiting groove at the rear end of the main shaft 4, and the multiple fixed baffles 1 are set to radially limit through the annular lock ring 2 to prevent the fixed baffles 1 from falling out of the limiting groove, and the annular lock ring 2 is axially limited through the retaining spring 3, so that the multiple fixed baffles 1 are firmly clamped in the limiting groove, which can not only ensure the reliable axial limitation of the gear 5 and the main shaft 4, can withstand large axial force, but also ensure the convenience of disassembly and assembly of the fixed baffles 1, saving time and effort. The overall structure is simple, easy to implement, and practical.

[0034] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0035] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0036] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transmission main shaft rear end limiting structure, comprising a main shaft (4) and a gear (5) sleeved on the rear end of the main shaft (4) and limited in circumferential rotation with the rear end of the main shaft (4), characterized in that: The main shaft (4) is provided with a shaft shoulder capable of abutting against the front side of the gear (5); a limiting groove is provided at the rear end of the main shaft (4); at least two arc-shaped fixed baffles (1) are clamped in the limiting groove; the front side of the fixed baffle (1) abuts against the rear side of the gear (5) for limiting position; an annular locking ring (2) is sleeved on the outer side of the fixed baffle (1); and a retaining spring (3) capable of axially limiting the annular locking ring (2) is clamped on the gear (5); A gap is left between the inner side of the annular locking ring (2) and the outer side of the fixed baffle (1); The thickness of the annular locking ring (2) is greater than the thickness of the fixed baffle (1); The front side of the annular locking ring (2) abuts against the rear side of the gear (5), and the rear side of the annular locking ring (2) abuts against and limits the position through the retaining spring (3).

2. The transmission main shaft rear end limiting structure according to claim 1, characterized in that: The fixed baffles (1) are in an equally divided arc structure, and there is a gap between the end surfaces of adjacent fixed baffles (1).

3. The transmission main shaft rear end limiting structure according to claim 1, characterized in that: The width-to-thickness ratio of the fixed baffle (1) is less than 1:

1.

4. The transmission main shaft rear end limiting structure according to claim 1, characterized in that: The gear (5) is provided with a slot capable of clamping the clamping ring (3).

5. The transmission main shaft rear end limiting structure according to claim 1, characterized in that: There are two fixed baffles (1), each of which is a semicircular arc structure.

6. The transmission main shaft rear end limiting structure according to claim 1, characterized in that: The rear end of the main shaft (4) is in a spline structure, and a keyway matching the spline structure is provided in the mounting hole of the gear (5).

Images