Gearbox piston for automobile

Abstract

The utility model relates to the technical field of gearbox pistons, and discloses a gearbox piston for an automobile, which comprises a main body component, a gearbox shell, a piston and a sealing ring, a mounting groove is arranged in the gearbox shell, the piston is positioned in the piston, the sealing ring is sleeved outside the piston, the gearbox shell is provided with a stepped groove, and the stepped groove is communicated with the mounting groove. A stepped groove is formed in the piston, a stepped surface is arranged on the sealing ring, the stepped groove can be clamped with the stepped surface, a lip-shaped ring is fixed at the bottom of the piston and is provided with an upper lip, a lower lip and a lip root, the upper lip is fixed with the piston, and the lip root is attached to the inner wall of the mounting groove. The utility model has the beneficial effects that the piston is movably connected with the sealing ring through the design, when the sealing performance of one of the piston and the sealing ring is reduced, only the corresponding sealing ring or piston needs to be replaced, the whole replacement is not needed, the part cost required by maintenance is greatly reduced, the waste of resources is avoided, and the effective utilization rate of the resources is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox piston technical field, especially a gearbox piston for automobile. BACKGROUND

[0002] In the current transmission structure, the piston as a key component, its sealing performance directly affects the working efficiency and reliability of the transmission. The traditional transmission piston is usually composed of a piston block and a sealing ring. The piston block is generally disc-shaped, with a through hole in the inside, mainly used for transmitting pressure in the hydraulic system of the transmission to realize gear shifting and other operations. The sealing ring is annular, installed at the bottom of the piston and close to the side edge of the piston, tightly adhering to the side wall and bottom wall of the transmission during operation to prevent hydraulic oil leakage and ensure effective pressure transmission. The existing piston and sealing ring adopt a fixed connection mode. When the sealing performance of either the piston or the sealing ring decreases, the damaged component cannot be replaced individually due to the tight fixation of the two, and the piston block and the sealing ring must be replaced as a whole, which leads to great waste of resources and increases maintenance costs. SUMMARY

[0003] In view of the above and / or existing problems in the gearbox piston for automobile, the utility model is proposed.

[0004] Therefore, the problem to be solved by the utility model is that the piston block and the sealing ring are fixed to each other, and when the sealing performance of either the piston or the sealing ring decreases, the entire piston must be replaced.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: a gearbox piston for automobile, comprising a main body assembly, including a gearbox shell, a piston, and a sealing ring, an installation groove is formed in the gearbox shell, the piston is located in the piston, the sealing ring is sleeved outside the piston, the gearbox shell is provided with a stepped groove, the sealing ring has a stepped surface, the stepped groove can be engaged with the stepped surface, a lip ring is fixed to the bottom of the piston, the lip ring has an upper lip, a lower lip, and a lip root, the upper lip is fixed to the piston, and the lip root is attached to the inner wall of the installation groove.

[0006] As a preferred scheme of the gearbox piston for automobile according to the utility model, the stepped surface is located on the outer ring of the sealing ring, and the inner ring of the piston is provided with a wave surface.

[0007] As a preferred scheme of the gearbox piston for automobile according to the utility model, the height of the wave surface is 0.5-1 mm, and the distance between adjacent wave surfaces is 1-2 mm.

[0008] As a preferred scheme of the automobile gearbox piston, the lip-shaped ring has a cavity.

[0009] As a preferred scheme of the automobile gearbox piston, the lower lip is in contact with the top of the sealing ring.

[0010] As a preferred scheme of the automobile gearbox piston, the piston is provided with a through hole.

[0011] As a preferred scheme of the automobile gearbox piston, a second through hole is formed in the gearbox shell.

[0012] As a preferred scheme of the automobile gearbox piston, a steel sheet and a friction sheet are arranged in the gearbox shell.

[0013] As a preferred scheme of the automobile gearbox piston, the number of the steel sheet and the friction sheet is multiple.

[0014] As a preferred scheme of the automobile gearbox piston, the steel sheet and the friction sheet are arranged alternately.

[0015] The automobile gearbox piston has the beneficial effects that the piston and the sealing ring are movably connected, when the sealing property of one of them is reduced, only the corresponding sealing ring or piston needs to be replaced, the overall replacement is not needed, the cost of parts required for maintenance is greatly reduced, resource waste is avoided, and the effective utilization rate of resources is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of the drawings. Among them:

[0017] Figure 1 It is a whole structure diagram of the automobile gearbox piston.

[0018] Figure 2 It is a gearbox shell cross-sectional structure diagram of the automobile gearbox piston.

[0019] Figure 3 It is a piston structure diagram of the automobile gearbox piston. Figure 2 It is a local enlarged structure diagram of A in the middle.

[0020] Figure 4 It is a piston structure diagram of the automobile gearbox piston.

[0021] Figure 5 The structure diagram of the friction plate of the automobile gearbox piston. DETAILED DESCRIPTION

[0022] In order to make the above objectives, characteristics and advantages of the present application more apparent, a detailed description of the specific embodiments of the present application will be given below with reference to the accompanying drawings.

[0023] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details given in this description. In other instances, well-known methods, procedures, components, and circuits have not been described in detail as not to unnecessarily obscure aspects of the present application.

[0024] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. The "in one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0025] Embodiment 1

[0026] Reference Figures 1-5 For the first embodiment of the present application, the embodiment provides an automobile gearbox piston, which comprises a main body assembly 100, including a gearbox shell 101, a piston 102 and a sealing ring 103.

[0027] The piston 102 is used for transmitting hydraulic power, and the movement of the piston 102 can make the multiple steel sheets 105 and the friction plate 106 tightly combined or separated, so as to change the path and speed ratio of power transmission, realize the switching of different gears, and the sealing ring 103 is used for preventing hydraulic oil leakage, preventing hydraulic oil from leaking from the gap between the piston block and the cylinder wall, which is the prior art, and the present application does not make much repetition, and the person skilled in the art can clearly know the working principle.

[0028] The installation groove 101-1 is provided in the gearbox shell 101, the piston 102 is located in the piston 102, the installation groove 101-1 and the piston 102 are gap-fitted, the sealing ring 103 is sleeved outside the piston 102, the sealing ring 103 is located at the lower outer side of the piston 102, the piston 102 is attached to the inner wall of the installation groove 101-1, and the bottom of the sealing ring 103 is also attached to the inner bottom wall of the installation groove 101-1.

[0029] The gearbox housing 101 is provided with a stepped groove 101-2, the sealing ring 103 is provided with a stepped surface 103-1, the stepped groove 101-2 can be clamped with the stepped surface 103-1, through the stepped arrangement, when the stepped groove 101-2 is fitted with the stepped surface 103-1, the contact area between the sealing ring 103 and the gearbox housing 101 can be increased, the sealing effect is improved, the height of the stepped groove is 2mm-5mm, the width is 5mm-10mm, if larger pressure needs to be borne, the height and width of the stepped groove can be appropriately increased to enhance the sealing capacity, the stepped surface 103-1 is small in size, and the sealing ring 103 has a deformation capacity, so that the installation of the piston 102 into the installation groove 101-1 is not affected.

[0030] Compared with the flat connection, the larger contact area means a larger sealing pressure distribution area, which can more effectively prevent the leakage of hydraulic oil and the like, the fitting of different stepped grooves 101-2 and different stepped surfaces 103-1 can form a multi-layer sealing barrier, even if a small leakage occurs in a layer, other layers can still play a certain sealing role, and the overall sealing performance is greatly improved.

[0031] The piston 102 is fixedly provided with a lip-shaped ring 104, the lip-shaped ring 104 has an upper lip 104-1, a lower lip 104-2 and a lip root 104-3, the upper lip 104-1 is fixed with the piston 102, and the lip root 104-3 is fitted with the inner wall of the installation groove 101-1.

[0032] The lip-shaped ring 104 has a lip-shaped sealing structure, the lip has good elasticity, under the action of oil pressure and mechanical pressure, the lip is tightly fitted on the surface of the sealing ring 103, the leakage of liquid is effectively prevented, and the sealing property between the piston 102 and the sealing ring 103 is ensured, meanwhile, with the operation of the equipment, wear inevitably occurs between the piston 102 and the sealing ring 103, the sealing performance is reduced, the lip-shaped ring 104 has the capacity of automatically compensating the wear, when the lip is worn, under the action of pressure, the lip is further deformed, the contact area between the lip and the sealing ring 103 is increased, the gap caused by the wear is compensated, and the good sealing effect is maintained.

[0033] Embodiment 2

[0034] Referring to Figures 2-5 As a second embodiment of the utility model, the embodiment is based on the previous embodiment.

[0035] Specifically, the stepped surface 103-1 is located at the outer circle of the sealing ring 103, and the inner circle of the piston 102 is provided with a wave surface 102-1.

[0036] Specifically, the height of the wave surface 102-1 is 0.5mm-1mm, and the distance between adjacent waves is 1mm-2mm.

[0037] When connecting the piston 102 and the sealing ring 103, attention should be paid to the fit of the wavy surface 102-1 and the inner wall of the sealing ring 103. Through the wavy design, the contact area between the piston 102 and the sealing ring 103 is greatly increased compared to the flat connection. The larger contact area means that under the same pressure condition, the sealing ring 103 and the piston 102 can form a closer fit, thereby effectively reducing the possibility of leakage. More contact points can disperse the pressure and reduce the risk of local pressure being too high to cause damage to the sealing ring 103, thereby improving the reliability of the seal.

[0038] The wavy undulating structure can form multiple sealing barriers between the piston 102 and the sealing ring 103. When there is pressure when hydraulic oil flows, the hydraulic oil needs to pass through more tortuous paths to leak out, which greatly increases the resistance to leakage and significantly improves the sealing effect. Even if the sealing ring 103 is worn to some extent during operation, the wavy structure can still maintain good sealing performance within a certain range because other undamaged wave parts can still play a sealing role.

[0039] Specifically, the lip ring 104 has a cavity 104-4.

[0040] The lip ring 104 achieves sealing effect by designing an interference amount to achieve extrusion of the lip and radial tension of the medium pressure on the lip. In a natural state, an interference amount is designed, and the lip ring 104 contacts and extrudes the sealing ring 103 through its resilience, achieving sealing effect.

[0041] In the working state, i.e. under the action of oil pressure, the cavity 104-4 will be filled with hydraulic oil. At this time, the hydraulic oil in the cavity 104-4 will exert pressure on the upper lip 104-1, the lower lip 104-2 and the lip root 104-3, and the stress will exceed that in the pressure-free state, thereby making the lip root 104-3 fit more closely with the installation groove 101-1, and the lower lip 104-2 contacts more closely with the top of the sealing ring 103.

[0042] Specifically, the lower lip 104-2 contacts the top of the sealing ring 103.

[0043] In a natural state, the lower lip 104-2 contacts and extrudes the sealing ring 103 due to the interference design of the lip ring 104, achieving sealing effect.

[0044] Specifically, the piston 102 is provided with a first through hole 102-2.

[0045] The first through hole 102-2 leaves space for other key mechanisms in the gearbox.

[0046] Embodiment 3

[0047] Referring toFigures 1-5 For the third embodiment of the utility model, the embodiment is based on the previous two embodiments.

[0048] Specifically, the second through hole 101-3 is arranged on the gearbox shell 101.

[0049] The first through hole 102-2 corresponds to the second through hole 101-3, and space is left for other key mechanisms in the gearbox.

[0050] Specifically, the steel sheet 105 and the friction sheet 106 are arranged in the gearbox shell 101.

[0051] The steel sheet 105 has high hardness and great strength, and mainly plays a role in transmitting power, and the friction sheet 106 has a friction material on the surface and can provide a large friction force.

[0052] Specifically, the number of the steel sheet 105 and the friction sheet 106 is multiple groups.

[0053] Specifically, the steel sheet 105 and the friction sheet 106 are arranged alternately.

[0054] The steel sheet 105 and the friction sheet 106 are arranged alternately, and by controlling their combination and separation, power transmission or cutting can be realized. When power transmission is needed, the steel sheet 105 and the friction sheet 106 are tightly attached, and the friction force is relied on to transmit power from one component to another component, and when power cutting is needed, they are separated, and the power transmission is interrupted.

[0055] When the gearbox needs to engage a certain gear, the hydraulic system controls the piston 102 to push the pressure plate, so that the steel sheet 105 and the friction sheet 106 are tightly pressed together. Because there is a large friction force between the friction material on the surface of the friction sheet 106 and the steel sheet 105, the power of the engine is transmitted to the output shaft or other related components of the gearbox through the alternately arranged steel sheet 105 and friction sheet 106, realizing power transmission and driving the vehicle to run.

[0056] When gear shifting or power cutting is needed, the hydraulic system is depressurized, the piston 102 is reset under the action of the return spring, the pressure plate no longer exerts pressure on the steel sheet 105 and the friction sheet 106, the friction force between them disappears, and the steel sheet 105 and the friction sheet 106 are separated. At this time, the power transmission is interrupted, and the power of the engine cannot be transmitted to the subsequent components of the gearbox, creating conditions for gear shifting.

[0057] In use, the sealing ring 103 is first opened by using a special tool, so that it can be outside the wavy surface 102-1 of the piston 102, and the piston 102 is flush with the bottom end surface of the sealing ring 103, and the lower lip 104-2 is in contact with the top of the sealing ring 103, then the piston 102 and the sealing ring 103 are put into the installation groove 101-1 together, and the stepped groove 101-2 is ensured to be engaged with the stepped surface 103-1, so that the installation of the piston 102 is completed.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A gear box piston for an automobile, characterized by: Including, The main body assembly (100) includes a gearbox shell (101), a piston (102), and a sealing ring (103), the gearbox shell (101) is provided with a mounting groove (101-1) inside, the piston (102) is located inside the piston (102), the sealing ring (103) is sleeved outside the piston (102), the gearbox shell (101) is provided with a stepped groove (101-2), the sealing ring (103) has a stepped surface (103-1), the stepped groove (101-2) can be clamped with the stepped surface (103-1), the bottom of the piston (102) is fixed with a lip ring (104), the lip ring (104) has an upper lip (104-1), a lower lip (104-2), and a lip root (104-3), the upper lip (104-1) is fixed with the piston (102), and the lip root (104-3) is attached to the inner wall of the mounting groove (101-1).

2. The transmission piston for an automotive vehicle as set forth in claim 1, characterized in that: The stepped surface (103-1) is located on the outer ring of the sealing ring (103), and the inner ring of the piston (102) is provided with a wave surface (102-1).

3. The transmission piston for an automotive vehicle as set forth in claim 2, characterized in that: The height of the wave surface (102-1) is 0.5-1 mm, and the distance between adjacent waves is 1-2 mm.

4. The transmission piston for an automotive vehicle as set forth in claim 2 or 3, characterized in that: The lip ring (104) has a cavity (104-4).

5. The transmission piston for an automotive vehicle as set forth in claim 4, characterized in that: The lower lip (104-2) is in contact with the top of the sealing ring (103).

6. The transmission piston for an automotive vehicle as set forth in claim 5, characterized in that: The piston (102) is provided with a first through hole (102-2).

7. The transmission piston for an automotive vehicle as set forth in claim 5 or 6, characterized in that: The gearbox shell (101) is provided with a second through hole (101-3).

8. The transmission piston for an automotive vehicle as set forth in claim 7, characterized in that: The gearbox shell (101) is provided with a steel sheet (105) and a friction sheet (106).

9. The transmission piston for an automotive vehicle as set forth in claim 8, characterized in that: The number of the steel sheet (105) and the friction sheet (106) is multiple.

10. The transmission piston for an automotive vehicle as set forth in claim 8 or 9, characterized in that: The steel sheet (105) and the friction sheet (106) are arranged alternately.

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