Cooling oil way of wet clutch

Abstract

The utility model relates to the technical field of transmission oil-driven clutches, in particular to a wet clutch cooling oil way. The wet clutch cooling oil way comprises a wet clutch and an input shaft provided with a spline section, the input shaft oil way comprises an input shaft inner oil way and at least two input shaft outer oil ways, one end of each input shaft outer oil way is communicated with the wet clutch, and the other end of each input shaft outer oil way is communicated with the input shaft inner oil way. According to the scheme, the size of a clutch system is reduced, occupied space of the clutch system is reduced, the length of an oil way supply passage is reduced, and the circulation efficiency of an oil way is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission oil driven clutch, in particular to a wet clutch cooling oil circuit. Background Art

[0002] Due to the needs of the working scene, the temperature of the wet clutch will rise rapidly during the process of transmitting torque. In the design process of the hydraulic system, the temperature rise is considered, and the wet clutch will be cooled by oil cooling. Due to the different structural designs of different cars, the matching wet clutches are also different. The same product structure of the wet clutch needs to design a matching cooling oil circuit. The prior art JP1998009287A sets a lubricating oil supply channel on the second shell support plate that rotates continuously with the input shaft. In addition to the pressure of the lubricating oil, the lubricating oil introduced from the inner diameter side is also forced to be supplied to the outer diameter side by centrifugal force, and the lubricating oil is stored in the lubricating oil storage tank from the opening part of the outlet formed on the outer diameter side closer to the friction surface. This patent requires the second shell support plate to be set up so that there is space to set the lubricating oil supply channel, occupying the space of the wet clutch, increasing the size of the clutch system, and there are problems such as low lubricating oil cooling efficiency. The inventor believes that there is still room for improvement. Utility Model Content

[0003] In order to reduce the size of a clutch system, improve the cooling and lubrication efficiency of the clutch system, shorten the supply path of the transmission oil, speed up the supply circulation of the transmission oil, and reduce the production cost, the utility model provides a wet clutch cooling oil circuit, the wet clutch cooling oil circuit comprises a wet clutch and an input shaft provided with a spline section, a first retaining ring is provided on one side of the spline section of the input shaft, the input shaft is provided with an input shaft oil circuit, the input shaft oil circuit comprises an input shaft inner oil circuit and four input shaft outer oil circuits, the spline section is provided with an input shaft outer oil circuit, an end of the input shaft outer oil circuit close to the first retaining ring is connected to the wet clutch, and an end of the input shaft outer oil circuit away from the first retaining ring is provided with an oil hole connected to the input shaft inner oil circuit. The utility model adopts an input shaft oil circuit arranged on the input shaft to realize the transmission oil supply of the wet clutch system, avoids the need to arrange an additional structure in the clutch system for arranging a transmission oil supply channel, shortens the transmission oil supply channel, speeds up the circulation of the transmission oil, and improves the cooling efficiency of the transmission oil; an input oil external oil circuit is adopted to supply the transmission oil in a part of the oil circuit in the input shaft internal oil circuit to the wet clutch, thereby ensuring the normal cooling and lubrication of the wet clutch.

[0004] Preferably, a blocking portion is provided at one end of the spline segment away from the first retaining ring, and when the blocking portion of the spline segment is meshed with the input shaft gear, the end of the input shaft external oil path away from the first retaining ring is blocked. The blocking portion is meshed with the input shaft to block the input shaft external oil path from flowing to the path away from the first retaining ring, so that the transmission oil flows to the wet clutch, and the normal cooling and lubrication of the wet clutch is achieved.

[0005] Preferably, the oil circuit inside the input shaft includes a central oil circuit and at least two edge oil circuits, each of the edge oil circuits is connected to at least one corresponding oil circuit outside the input shaft. The central oil circuit is used to supply working transmission oil to the wet clutch, and the edge oil circuit is used to supply transmission oil for cooling and lubricating the wet clutch.

[0006] Preferably, the oil circuit in the input shaft further comprises a central oil circuit, the central oil circuit is located on the axis of the input shaft, the central oil circuit is connected to the wet clutch, and the central oil circuit is used to supply working transmission oil to the wet clutch.

[0007] Preferably, the first retaining ring is provided with at least two through grooves, each of which is connected to at least one of the input shaft external oil circuits, and the through grooves are connected to the input shaft external oil circuit of the spline segment and the wet clutch. The through grooves are provided in the first retaining ring to enable the transmission oil to cool and lubricate the wet clutch.

[0008] Preferably, the edge oil passage and the input shaft outer oil passage are evenly distributed on the circumference of the spline segment, and the through grooves are evenly distributed on the circumference of the first retaining ring. By evenly distributing the edge oil passage and the input shaft outer oil passage on the circumference, the transmission oil is evenly supplied on a time scale, ensuring that the wet clutch can be cooled and lubricated.

[0009] Preferably, a case oil circuit is provided in the transmission case, and a rear cover oil circuit is provided in the transmission rear cover. Providing oil circuits in the transmission case and the transmission rear cover avoids the need for additional structures to accommodate transmission oil circuits, thereby reducing the size of the transmission.

[0010] Preferably, one end of the housing oil circuit is connected to the rear cover oil circuit, and the other end of the housing oil circuit is connected to the input shaft cooling oil circuit. The oil pump provides hydraulic energy, and under the control of the valve body, the transmission oil flows from the transmission housing, through the housing oil circuit, to the transmission rear cover, and then flows from the rear cover oil circuit to the transmission.

[0011] The utility model solves the problems of the prior art occupying the space of the wet clutch, increasing the size of the clutch system, and having low cooling efficiency of the lubricating oil. The utility model provides a wet clutch cooling oil circuit, wherein an input shaft oil circuit is arranged on the input shaft, so as to realize the transmission oil supply of the wet clutch system, avoid setting an additional structure in the clutch system for setting the transmission oil supply channel, shorten the transmission oil supply channel, speed up the circulation of the transmission oil, and improve the cooling efficiency of the transmission oil; an input oil external oil circuit is used to supply the transmission oil in part of the oil circuit in the input shaft internal oil circuit to the wet clutch, so as to ensure the normal cooling and lubrication of the wet clutch; an oil circuit is arranged in the transmission housing and the transmission rear cover, so as to reduce the occupation of the space in the transmission and provide lubricating oil for the wet clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the input shaft of the utility model;

[0015] Figure 3 It is a schematic cross-sectional view of the input shaft of the utility model;

[0016] Figure 4 It is a cross-sectional structural schematic diagram of the spline segment of the utility model;

[0017] Figure 5 It is a schematic structural diagram of the transmission housing and the transmission rear cover of the utility model.

[0018] Explanation of the reference numerals: 1 transmission housing; 2 housing oil circuit; 3 transmission rear cover; 4 rear cover oil circuit; 5 input shaft oil circuit; 5.1 center oil circuit; 5.2 edge oil circuit; 6 input shaft; 6.1 first retaining ring; 6.2 spline section; 6.3 blocking part; 7 input shaft gear; 8 wet clutch. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Embodiment 1

[0021] like Figure 1 As shown, a wet clutch cooling oil circuit, the wet clutch 8 cooling oil circuit comprises a wet clutch 8, a transmission rear cover 3, an input shaft 6 provided with a spline section 6.2 and an input shaft gear 7, the input shaft gear 7 is meshed with the spline section 6.2 of the input shaft 6, and the transmission rear cover 3 and the wet clutch 8 are located on both sides of the input shaft gear 7. A first retaining ring 6.1 is provided on one side of the spline section 6.2 of the input shaft 6, the input shaft 6 is provided with an input shaft oil circuit 5, the input shaft oil circuit 5 is connected to the space on both sides of the input shaft gear 7, the input shaft oil circuit 5 comprises an input shaft 6 inner oil circuit and at least two input shaft 6 outer oil circuits, the spline section 6.2 is provided with an input shaft 6 outer oil circuit, one end of the input shaft 6 outer oil circuit close to the first retaining ring 6.1 is connected to the wet clutch 8, and an end of the input shaft 6 outer oil circuit away from the first retaining ring 6.1 is provided with an oil hole connected to the input shaft 6 inner oil circuit.

[0022] Through the above-mentioned arrangement, an input shaft oil circuit 5 is provided on the input shaft 6, and the input shaft oil circuit 5 is connected to both sides of the input shaft gear 7, so as to realize the transmission oil supply of the wet clutch system, avoid setting an additional structure in the clutch system for setting the transmission oil supply channel; shorten the transmission oil supply channel, speed up the circulation of the transmission oil, and improve the cooling efficiency of the transmission oil; adopt the input oil external oil circuit to supply the transmission oil in part of the oil circuit in the input shaft 6 to the wet clutch 8, so as to ensure the normal cooling and lubrication of the wet clutch 8.

[0023] Combination Figure 1 and Figure 2 As shown, the input shaft 6 of this embodiment includes a first retaining ring 6.1, a spline section 6.2 and a blocking portion 6.3. A blocking portion 6.3 is provided at one end of the spline section 6.2 away from the first retaining ring 6.1. The blocking portion 6.3 is a half-through groove processed on the complete spline, and the remaining unprocessed part of the spline on the same line as the axis of the half-through groove is the blocking portion 6.3. The end of the half-through groove close to the first retaining ring 6.1 is open, and the end away from the first retaining ring is closed. When the blocking portion 6.3 of the spline section 6.2 is engaged with the input shaft gear 7, the end of the external oil circuit of the input shaft 6 away from the first retaining ring 6.1 is blocked. The blocking portion 6.3 is engaged with the input shaft 6 to block the external oil circuit of the input shaft 6 from flowing to the passage away from the first retaining ring 6.1, so that the transmission oil flows to the wet clutch 8, and the normal cooling and lubrication of the wet clutch 8 are achieved.

[0024] Combination Figure 1 , Figure 3 and Figure 5As shown, the internal oil circuit of the input shaft 6 of this embodiment includes a central oil circuit 5.1 and four edge oil circuits 5.2. The internal oil circuits of the input shaft 6 are all connected to the rear cover oil circuit 4. Each edge oil circuit 5.2 is correspondingly connected to an external oil circuit of the input shaft 6. The internal oil circuit of the input shaft 6 uses the central oil circuit 5.1 to supply the wet clutch 8 with transmission oil for working, and uses the edge oil circuits 5.2 to supply the wet clutch 8 with transmission oil for cooling and lubricating the wet clutch 8.

[0025] Combination Figure 3 and Figure 4 As shown, the first retaining ring 6.1 of this embodiment is provided with four through grooves, each of which is connected to a corresponding external oil path of the input shaft 6, and the through grooves are connected to the external oil path of the input shaft 6 of the spline section 6.2 and the wet clutch 8. The through grooves are provided in the first retaining ring 6.1 to enable the transmission oil to cool and lubricate the wet clutch 8.

[0026] like Figure 4 As shown, the spline segment 6.2 of this embodiment is evenly distributed on the edge oil passage 5.2 and the outer oil passage of the input shaft 6, and the through grooves are evenly distributed on the circumference of the first retaining ring 6.1. By evenly distributing the edge oil passage 5.2 and the outer oil passage of the input shaft 6 on the circumference, the transmission oil is evenly supplied on a time scale, ensuring that the wet clutch 8 can be cooled and lubricated.

[0027] like Figure 5 As shown, a case oil circuit 2 is provided in the transmission case 1, and a rear cover oil circuit 4 is provided in the transmission rear cover 3. The oil circuits are provided in the transmission case 1 and the transmission rear cover 3, thereby avoiding the need for additional structures to accommodate the oil circuits of the transmission oil and reducing the size of the transmission.

[0028] One end of the housing oil circuit 2 is connected to the rear cover oil circuit 4, and the other end of the housing oil circuit 2 is connected to the cooling oil circuit of the input shaft 6. The oil pump provides hydraulic energy, and under the control of the valve body, the transmission oil flows from the transmission housing 1, through the housing oil circuit 2, to the transmission rear cover 3, and then flows from the rear cover oil circuit 4 to the transmission.

[0029] The utility model provides a wet clutch cooling oil circuit, in which an input shaft oil circuit 5 is arranged on an input shaft 6 to realize the transmission oil supply of the wet clutch system, including transmission oil for cooling and lubricating the wet clutch and transmission oil for supplying the wet clutch piston movement, avoiding the need to arrange an additional structure in the clutch system for arranging a transmission oil supply channel, shortening the transmission oil supply channel, accelerating the circulation of the transmission oil, and improving the cooling efficiency of the transmission oil; an input oil external oil circuit is used to supply the transmission oil in a part of the oil circuit in the oil circuit of the input shaft 6 to the wet clutch 8, so as to ensure the normal cooling and lubrication of the wet clutch 8; oil circuits are arranged in the transmission housing 1 and the transmission rear cover 3, so as to reduce the occupation of the space in the transmission and provide lubricating oil for the wet clutch 8.

[0030] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the utility model, and are not intended to limit the implementation methods of the technology of the utility model in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the utility model, but they should still be regarded as technologies or embodiments that are essentially the same as the utility model.

Claims

1. A wet clutch cooling oil circuit, comprising a wet clutch (8) and an input shaft (6) provided with a spline section (6.2), characterized in that: A first retaining ring (6.1) is provided on one side of the spline section (6.2) of the input shaft (6), and the input shaft (6) is provided with an input shaft oil circuit (5); the input shaft oil circuit (5) comprises an input shaft (6) internal oil circuit and at least two input shaft external oil circuits, the input shaft external oil circuits being arranged on the spline section (6.2), one end of the input shaft external oil circuit close to the first retaining ring (6.1) being connected to the wet clutch (8), and one end of the input shaft external oil circuit away from the first retaining ring (6.1) being provided with an oil hole connected to the input shaft internal oil circuit.

2. A wet clutch cooling oil circuit according to claim 1, characterized in that: The cooling oil circuit comprises an input shaft gear (7); an end of the spline section (6.2) away from the first retaining ring (6.1) is provided with a blocking portion (6.3); when the blocking portion (6.3) of the spline section (6.2) meshes with the input shaft gear (7), the end of the input shaft external oil circuit away from the first retaining ring (6.1) is blocked.

3. A wet clutch cooling oil circuit according to claim 2, characterized in that: The input shaft inner oil circuit has at least two edge oil circuits (5.2), and each edge oil circuit (5.2) is correspondingly connected to at least one input shaft outer oil circuit.

4. A wet clutch cooling oil circuit according to claim 3, characterized in that: The oil circuit in the input shaft further comprises a central oil circuit (5.1), the central oil circuit (5.1) being located on the axis of the input shaft (6), and the central oil circuit (5.1) being connected to the wet clutch (8).

5. A wet clutch cooling oil circuit according to claim 4, characterized in that: The first retaining ring (6.1) is provided with at least two through grooves, each of the through grooves is correspondingly connected to at least one of the input shaft external oil circuits, and the through grooves are connected to the input shaft external oil circuit of the spline section (6.2) and the wet clutch (8).

6. A wet clutch cooling oil circuit according to claim 5, characterized in that: The edge oil passage (5.2) and the input shaft outer oil passage are evenly distributed on the circumference of the spline segment (6.2), and the through grooves are evenly distributed on the circumference of the first retaining ring (6.1).

7. A wet clutch cooling oil circuit according to claim 6, characterized in that: The wet clutch (8) cooling oil circuit comprises a transmission housing (1) and a transmission rear cover (3); a housing oil circuit (2) is provided in the transmission housing (1), and a rear cover oil circuit (4) is provided in the transmission rear cover (3).

8. A wet clutch cooling oil circuit according to claim 7, characterized in that: One end of the housing oil circuit (2) is in communication with the rear cover oil circuit (4), and the other end of the housing oil circuit (2) is in communication with the input shaft (6) cooling oil circuit.

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