Plugging structure of hydraulic high-pressure oil duct

Abstract

The utility model discloses a plugging structure of a hydraulic high-pressure oil duct, and relates to the field of automobile transmissions, the plugging structure is used for being matched with a threaded hole formed in a shell, the threaded hole is communicated with a process oil way, the plugging structure comprises a plugging base body, a limiting ring is arranged in the middle of the plugging base body in a surrounding mode, and threads are arranged on the side of the plugging base body. The side, facing the threads, of the limiting ring is provided with a sealing piece, the outer end of the threaded hole is provided with a mounting groove, and the mounting groove corresponds to the sealing piece. The plugging structure of the hydraulic high-pressure oil duct is high in reliability, high in pressure bearing capacity and high in buffering and self-digesting capacity.

Description

Technical Field

[0001] The utility model belongs to the field of automobile transmissions, and in particular relates to a plugging structure for a hydraulic high-pressure oil channel. Background Art

[0002] With the continuous progress of the automotive industry, the complexity of gearbox design has been increasing, which has put forward higher requirements for hydraulic systems. As a key component of the oil circuit layout, the gearbox housing has an extremely complex structural design. In order to ensure the normal operation of other components inside the gearbox, multiple process holes must be machined on the housing to achieve interconnection and intercommunication of the oil circuit. However, the existence of these process holes also brings potential risks of oil leakage. Therefore, a reliable sealing structure must be adopted to ensure the sealing of the oil circuit and prevent oil leakage.

[0003] The prior art includes an invention patent named oil passage sealing structure, the publication number of which is KR1020050123465A. The purpose of this invention is to seal the oil passage formed in the cylinder block by a plug with a shortened installation length, thereby reducing the total length of the cylinder block and simplifying the assembly process of the plug. To achieve the above purpose, a cap-type plug with an O-ring installed on its entire circumference is inserted and fixed at the entrance of the main oil passage formed in the cylinder block, and the cap-type plug is supported by a front cover installed at the front of the cylinder block. However, this invention cannot achieve sealing reliability under high pressure. Summary of the invention

[0004] The utility model aims to provide a plugging structure for a hydraulic high-pressure oil channel which has high reliability, strong pressure bearing capacity and strong buffering and self-digestion capacity.

[0005] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0006] A sealing structure for a hydraulic high-pressure oil channel, the sealing structure is used to cooperate with a threaded hole opened on a shell, the threaded hole is connected to a process oil channel, the sealing structure includes a sealing base, a limiting ring is arranged around the middle of the sealing base, threads are arranged on the side of the sealing base, the threads are arranged correspondingly to the threaded hole, a sealing member is arranged on the side of the limiting ring facing the thread, an installation groove is arranged at the outer end of the threaded hole, and the installation groove and the sealing member are arranged correspondingly.

[0007] According to an embodiment of the present invention, the sealing element is a sealing ring.

[0008] Through the overall design of a plugging structure for a hydraulic high-pressure oil channel, a thread is provided on the side of the plugging base, and the thread is on the side of the limit ring. The thread and the threaded hole are provided in cooperation to achieve a tight connection between the plugging structure and the threaded hole, which can prevent the plugging structure from falling off and leaking during system operation, thereby improving reliability; and a sealing member is provided on the side of the limit ring facing the thread, and an installation groove is provided at the outer end of the thread. The installation groove and the sealing member cooperate to achieve sealing. It should be noted that the sealing member adopts a sealing ring made of rubber material, which can withstand the extremely high oil pressure in the process oil circuit. Compared with the prior art, this plugging structure adopts thread cooperation, which is very convenient in installation and disassembly, and the threaded hole and the installation groove can be used as the detection installation boundary of the oil pressure sensor.

[0009] According to an embodiment of the utility model, a buffer blind hole is opened at one end of the blocking base body toward the threaded hole, and the buffer blind hole accommodates a buffer component.

[0010] According to one embodiment of the utility model, the buffer assembly includes a first buffer base column, which is accommodated in a buffer blind hole. A buffer cavity is provided on the side of the first buffer base column away from the limiting ring. A first plate body is provided at the bottom side of the buffer cavity. The first plate body and the buffer cavity are connected by a first elastic assembly.

[0011] Through the above design, a first buffer column is accommodated in the buffer blind hole, and the first buffer column is provided with a buffer cavity. When the oil pressure in the process oil circuit rises or falls, since the oil pressure in the buffer cavity has hysteresis, it should be noted that the hysteresis means that the oil pressure in the buffer cavity will follow up the change after the process oil circuit changes. There are the following two situations: when the oil pressure in the process oil circuit rises, the oil pressure in the process oil circuit will impact the buffer cavity. When the oil enters the buffer cavity, it will impact the first plate body. The first plate body will transfer the impact force to the first elastic component, and the first elastic component will compress it. Impact force absorption prevents the impact force from causing a greater impact on the plugging matrix, improves the reliability and sealing of the plugging structure, and increases the oil pressure in the process oil circuit; when the oil pressure in the process oil circuit drops, the oil pressure in the process oil circuit forms a relative negative pressure on the buffer cavity, and the oil will be transferred from the high-pressure buffer cavity to the process oil circuit. In this process, through the setting of the first plate body and the first elastic component, the first plate body will move outward under the drive of the first elastic component to achieve the balance of the oil pressure in the buffer cavity and the oil pressure in the process oil circuit, reduce the impact of the change in oil pressure on the plugging matrix, and increase the service life of the plugging matrix. Furthermore, the first elastic component adopts a spring.

[0012] According to an embodiment of the utility model, at least one buffer ring plate is provided in the buffer cavity, and a fixing plate is provided around and extended around the buffer ring plate, and the fixing plate is connected to the inner wall of the buffer cavity.

[0013] Through the above design, by providing multiple buffer ring plates, it is possible to further reduce the impact of changes in oil pressure in the buffer base on the sealing structure; in addition, when the oil pressure changes, the oil will flow along the buffer ring plate, and in the process of flowing, part of the oil along the direction of the buffer blind hole will move toward the wall of the buffer cavity, thereby converting the longitudinal impact force into a lateral impact force. It should be further explained that the longitudinal impact force refers to the impact force along the direction of the blind hole, and the lateral impact force refers to the impact force toward the side wall of the buffer cavity, thereby achieving the goal of reducing the longitudinal impact force while the lateral impact force will provide pressure to the side wall of the buffer cavity, thereby improving the coordination between the outside of the buffer cavity and the buffer blind hole, and improving the tightness of the first buffer base column. Moreover, the design of the buffer ring plate can achieve uniform distribution of lateral impact force, that is, the force received by the inner wall of the buffer cavity on the side of the ring plate is uniform, thereby preventing excessive lateral impact force at a certain place from causing damage to the first buffer base column. After the inner wall of the buffer cavity is impacted, the force will be transmitted to the inner wall of the internal buffer blind hole, thereby achieving a tighter fit between the external threaded part of the sealing base and the threaded hole, thereby preventing oil leakage when the oil pressure increases.

[0014] According to one embodiment of the utility model, the buffer assembly includes a second buffer base column, which is partially accommodated in the buffer blind hole. The second buffer base column protrudes from the buffer blind hole and has an extension ring extending circumferentially. The second buffer base column has at least one buffer through hole opened along the length direction.

[0015] According to an embodiment of the utility model, a plurality of petals are provided in the buffer through hole.

[0016] Through the above design, a second buffer base column is protruded in the buffer blind hole. When the oil pressure in the process oil circuit changes, the oil can only enter and exit the buffer blind hole through the buffer channel. Due to the limitation of the diameter of the buffer through hole, the buffer through hole has a certain buffering effect; in addition, the extension ring can improve the physical oil pressure buffering of the second buffer base column on the process oil circuit and improve the sealing effect of the plugging structure. A plurality of petals are provided in the buffer through hole, and the petals can improve the buffering effect of the second buffer base column. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the coordination between a blocking structure and a shell;

[0018] Figure 2 for Figure 1 Schematic diagram of the middle plugging structure and the shell assembly;

[0019] Figure 3 It is a schematic diagram of another plugging structure and shell cooperation;

[0020] Figure 4 for Figure 3 Schematic diagram of the middle plugging structure and the shell assembly;

[0021] Figure 5 It is a three-dimensional schematic diagram of a buffer component;

[0022] Figure 6 is a schematic cross-sectional view of a buffer component;

[0023] Figure 7 is a schematic diagram of the internal structure of the first buffer column;

[0024] Figure 8 This is a schematic diagram of the coordination between the blocking structure and the housing in Example 2;

[0025] Fig. 9 It is a schematic diagram of the cooperation between the fixing ring and the elastic pressing piece.

[0026] Figure numbers: sealing structure 1, sealing base 11, limiting ring 12, thread 13, buffer blind hole 14, buffer assembly 15, shell 2, threaded hole 21, process oil circuit 22, mounting groove 23, seal 3, first buffer base column 41, buffer cavity 42, first plate body 43, first elastic assembly 44, buffer ring plate 45, fixing plate 46, second buffer base column 51, extension ring 52, buffer through hole 53, petal body 54, fixing ring 6, elastic pressing sheet 61. DETAILED DESCRIPTION

[0027] The technical solution of the utility model is further described in detail below in conjunction with specific implementation methods and drawings:

[0028] Embodiment 1:

[0029] like Figure 1 - Figure 7 As shown, a sealing structure for a hydraulic high-pressure oil channel, the sealing structure 1 is used to cooperate with a threaded hole 21 opened on a shell 2, the threaded hole 21 is connected to a process oil circuit 22, the sealing structure 1 includes a sealing base 11, a limiting ring 12 is arranged around the middle of the sealing base 11, a thread 13 is arranged on the side of the sealing base 11, the thread 13 is arranged corresponding to the threaded hole 21, a sealing member 3 is arranged on the side of the limiting ring 12 facing the thread 13, an installation groove 23 is opened at the outer end of the threaded hole 21, and the installation groove 23 is arranged corresponding to the sealing member 3.

[0030] According to an embodiment of the present invention, the sealing member 3 is a sealing ring.

[0031] Through the overall design of a plugging structure for a hydraulic high-pressure oil channel, a thread 13 is provided on the side of the plugging base 11, and the thread 13 is on the side of the limit ring 12. The thread 13 is provided in cooperation with the threaded hole 21 to achieve a tight connection between the plugging structure 1 and the threaded hole 21, which can prevent the plugging structure 1 from falling off and leaking during system operation, thereby improving reliability; and a sealing member 3 is provided on the side of the limit ring 12 facing the thread 13, and a mounting groove 23 is provided at the outer end of the thread 13. The mounting groove 23 cooperates with the sealing member 3 to achieve sealing. It should be noted that the sealing member 3 adopts a sealing ring made of rubber material, so that it can withstand the extremely high oil pressure in the process oil circuit 22. Compared with the prior art, the plugging structure 1 is cooperated with the thread 13, which is very convenient in installation and disassembly, and the threaded hole 21 and the mounting groove 23 can be used as the detection installation boundary of the oil pressure sensor.

[0032] According to an embodiment of the present invention, a buffer blind hole 14 is formed at one end of the blocking base 11 facing the threaded hole 21 , and the buffer blind hole 14 accommodates a buffer component 15 .

[0033] According to one embodiment of the utility model, the buffer assembly 15 includes a first buffer base column 41, which is accommodated in the buffer blind hole 14. A buffer cavity 42 is provided on the side of the first buffer base column 41 away from the limiting ring 12. A first plate body 43 is provided at the bottom side of the buffer cavity 42. The first plate body 43 and the buffer cavity 42 are connected by a first elastic assembly 44.

[0034] Through the above design, a first buffer column is accommodated in the buffer blind hole 14, and the first buffer column is provided with a buffer cavity 42. When the oil pressure in the process oil circuit 22 rises or falls, since the oil pressure in the buffer cavity 42 has hysteresis, it should be noted that the hysteresis means that the oil pressure in the buffer cavity 42 will follow up the change after the process oil circuit 22 changes. There are the following two situations. When the oil pressure in the process oil circuit 22 rises, the oil pressure in the process oil circuit 22 will impact the buffer cavity 42. When the oil enters the buffer cavity 42, it will impact the first plate 43. The first plate 43 will transfer the impact force to the first elastic component, and the first elastic component 44 will compress the impact force. Absorb, prevent the impact force from causing greater impact on the plugging matrix 11, improve the reliability and sealing of the plugging structure 1, and increase the oil pressure in the process oil circuit 22; when the oil pressure in the process oil circuit 22 drops, the oil pressure in the process oil circuit 22 forms a relative negative pressure on the buffer cavity 42, and the oil will be transferred from the buffer cavity 42 with high pressure to the process oil circuit 22. In this process, through the setting of the first plate 43 and the first elastic component 44, the first plate 43 will move outward under the drive of the first elastic component 44, so as to achieve the balance between the oil pressure in the buffer cavity 42 and the oil pressure in the process oil circuit 22, reduce the impact of the change of oil pressure on the plugging matrix 11, and increase the service life of the plugging matrix 11. Furthermore, the first elastic component 44 adopts a spring.

[0035] Furthermore, the first buffer column 41 is made of a flexible material. As a flexible material, the first buffer column 41 can achieve interference fit with the buffer blind hole 14, thereby improving the connection and fastening degree between the first buffer column 41 and the buffer blind hole 14; in addition, the first buffer column 41 itself can absorb impact. Furthermore, the first buffer column 41 is made of rubber.

[0036] According to an embodiment of the present invention, at least one buffer ring plate 45 is disposed in the buffer cavity 42 . A fixing plate 46 is provided around and extends around the buffer ring plate 45 . The fixing plate 46 is connected to the inner wall of the buffer cavity 42 .

[0037] Through the above design, by providing multiple buffer ring plates 45, it is possible to further reduce the impact of changes in oil pressure in the buffer base on the sealing structure 1; in addition, when the oil pressure changes, the oil will flow along the buffer ring plate 45, and in the process of flowing, part of the oil along the direction of the buffer blind hole 14 will move toward the wall of the buffer cavity 42, thereby converting the longitudinal impact force into a lateral impact force. It should be further explained that the longitudinal impact force refers to the impact force along the direction of the blind hole, and the lateral impact force refers to the impact force toward the side wall of the buffer cavity 42, thereby achieving the goal of reducing the longitudinal impact force while providing pressure to the side wall of the buffer cavity 42, thereby improving the coordination between the outside of the buffer cavity 42 and the buffer blind hole 14, and improving the tightness of the first buffer base column 41. Moreover, the design of the buffer ring plate 45 can achieve uniform distribution of lateral impact force, that is, the force received by the inner wall surface of the buffer cavity 42 on the side of the ring plate is uniform, thereby preventing excessive lateral impact force at a certain place from causing damage to the first buffer base column 41. After the inner wall surface of the buffer cavity 42 is impacted, the force will be transmitted to the inner wall surface of the internal buffer blind hole 14, thereby achieving a tighter fit between the external thread 13 part of the sealing base 11 and the threaded hole 21, thereby preventing oil leakage when the oil pressure increases.

[0038] Furthermore, as the diameter of the buffer ring plate 45 increases away from the bottom of the buffer cavity 42, through the above design, the oil bodies of multiple cross sections can be diverted, and the flow rate of the oil bodies flowing in each diameter can be reduced, so as to improve the adjustment of the oil pressure change in the buffer cavity 42 during the process of increasing or decreasing the oil pressure; and the longitudinal impact of the oil bodies flowing in each diameter can be converted into a lateral impact.

[0039] According to an embodiment of the utility model, the buffer assembly 15 includes a second buffer base column 51, which is partially accommodated in the buffer blind hole 14. The second buffer base column 51 protrudes from the end of the buffer blind hole 14 and has an extension ring 52 extending circumferentially. The second buffer base column 51 has at least one buffer through hole 53 opened along the length direction.

[0040] According to an embodiment of the present invention, a plurality of petals 54 are disposed in the buffer through hole 53 .

[0041] Through the above design, a second buffer column 51 is protruded in the buffer blind hole 14. When the oil pressure in the process oil circuit 22 changes, the oil can only enter and exit the buffer blind hole 14 through the buffer channel. Due to the limitation of the diameter of the buffer through hole 53, the buffer through hole 53 has a certain buffering effect; in addition, the extension ring 52 can improve the physical oil pressure buffering of the second buffer column 51 on the process oil circuit 22, and improve the sealing effect of the plugging structure 1. A plurality of petals 54 are provided in the buffer through hole 53, and the petals 54 can improve the buffering effect of the second buffer column 51.

[0042] Furthermore, the second buffer component 15 is made of flexible material. The flexible material will produce elastic deformation when receiving pressure. When the second buffer component 15 receives the change of oil pressure, the extension ring 52 is provided at the end of the second buffer base column 51 to improve the effect of the second buffer component 15 changing with the oil pressure, and can achieve compression or stretching along its axial direction, thereby adapting to the change of oil pressure and improving the buffering effect. Furthermore, the second buffer component 15 and the petal body 54 are both made of rubber.

[0043] Furthermore, the second buffer column 51 and the first buffer column 41 can be arranged in coordination, the first buffer column 41 has a first step portion at one end, the second buffer column 51 has a second step portion at one end, and the first step portion and the second step portion can be arranged in coordination. The first step portion and the second step portion can realize the longitudinal connection of the first buffer column 41 and the second buffer column 51. This further improves the buffering effect under oil pressure changes. Furthermore, the first step portion and the second step portion are correspondingly provided with a connecting section, which is used to realize the fastening connection between the first step portion and the second step portion.

[0044] Embodiment 2:

[0045] like Figure 8 and Fig. 9 As shown, a sealing structure of a hydraulic high-pressure oil channel according to another embodiment of the utility model is different from Example 1 in that a fixing ring 6 is provided on the side of the limiting ring 12 facing the thread 13, and an elastic pressing sheet 61 is arranged around the inner side of the fixing ring 6.

[0046] Through the above design, the elastic pressing piece 61 abuts against the seal 3, which can improve the degree of fit between the seal 3 and the mounting groove 23; it should be further explained that the elastic pressing piece 61 is inclined, and the elastic pressing piece 61 can provide the seal 3 with a force toward the side of the mounting groove 23, thereby affecting the deformation of the seal 3, and improving the sealing effect of the blocking structure 1 by changing the deformation of the seal 3, and can reduce the vibration of the shell 2 directly transmitted to the blocking base 11, and reduce the displacement of the blocking structure 1 along its axial direction due to long use time, resulting in a reduction in the sealing effect, that is, the elastic pressing piece 61 surrounded by the fixing ring 6 can continuously achieve a close fit between the seal 3 and the mounting groove 23 within a certain range.

[0047] The embodiments described above provide a detailed description of the technical solution of the utility model. It should be understood that the above is only a specific embodiment of the utility model and is not intended to limit the utility model. Any modifications, supplements or similar substitutions made within the scope of the principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A plugging structure for a hydraulic high-pressure oil channel, the plugging structure (1) being used to cooperate with a threaded hole (21) provided on a housing (2), the threaded hole (21) being connected to a process oil channel (22), characterized in that: The blocking structure (1) comprises a blocking base (11), a limiting ring (12) is arranged around the middle of the blocking base (11), a thread (13) is arranged on the side of the blocking base (11), the thread (13) and the threaded hole (21) are arranged correspondingly, a sealing member (3) is arranged on the side of the limiting ring (12) facing the thread (13), and a mounting groove (23) is formed at the outer end of the threaded hole (21), and the mounting groove (23) and the sealing member (3) are arranged correspondingly.

2. A plugging structure for a hydraulic high-pressure oil channel according to claim 1, characterized in that: The sealing element (3) is a sealing ring.

3. The plugging structure of a hydraulic high-pressure oil channel according to claim 1, characterized in that: A buffer blind hole (14) is provided at one end of the blocking base (11) facing the threaded hole (21), and the buffer blind hole (14) accommodates a buffer component (15).

4. A plugging structure for a hydraulic high-pressure oil channel according to claim 3, characterized in that: The buffer assembly (15) comprises a first buffer base column (41), the first buffer base column (41) being received in the buffer blind hole (14), a buffer cavity (42) being provided on a side of the first buffer base column (41) away from the limiting ring (12), a first plate body (43) being provided at a spacing on the bottom side of the buffer cavity (42), and the first plate body (43) and the buffer cavity (42) being connected via a first elastic assembly (44).

5. A plugging structure for a hydraulic high-pressure oil channel according to claim 4, characterized in that: The buffer cavity (42) is provided with at least one buffer ring plate (45), and a fixing plate (46) is provided around and extends around the buffer ring plate (45), and the fixing plate (46) is connected to the inner wall of the buffer cavity (42).

6. The plugging structure of a hydraulic high-pressure oil channel according to claim 3, characterized in that: The buffer assembly (15) comprises a second buffer base column (51), the second buffer base column (51) being partially received in the buffer blind hole (14), an extension ring (52) extending circumferentially from the end of the second buffer base column (51) protruding from the buffer blind hole (14), and the second buffer base column (51) being provided with at least one buffer through hole (53) along the length direction.

7. A plugging structure for a hydraulic high-pressure oil channel according to claim 6, characterized in that: A plurality of flaps (54) are arranged in the buffer through hole (53).

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