CN218971806U - Transmission input shaft structure and vehicle - Google Patents

Abstract

The present disclosure relates to a transmission input shaft structure and a vehicle, the transmission input shaft structure including: an input shaft including opposite input and output ends; the input shaft is internally provided with at least three oil passing channels communicated with the outside, and the oil passing channels are arranged at intervals in the circumferential direction around the axis of the input shaft and extend along the axial direction of the input shaft; at least three of the oil passages include at least one high-pressure oil passage and at least one lubricating oil passage. The disclosed solution can improve the compactness of the spatial layout of the transmission input shaft structure.

Description

Transmission input shaft structure and vehicle

Technical Field

The present disclosure relates to the field of vehicle transmissions, and in particular to a transmission input shaft structure and a vehicle.

Background

The electromechanical coupling transmission combines the advantages of the electric automobile and the traditional transmission, so that the electromechanical coupling transmission has been developed as a research hot spot. Currently, the electromechanical transmission includes multiple power sources, such as an engine and an electric motor, wherein an input shaft assembly carries torque and rotational speed delivered from an engine end.

The input shaft assembly includes a clutch, an input shaft, and the like. The clutch can realize the switching of different speed ratio modes, and the work of the clutch needs high-pressure oil to control, so that a special oil delivery pipeline is required, the oil quantity and the oil pressure are severe, and otherwise, the normal work of the clutch is influenced. However, the special increase of the oil pipeline capable of bearing high pressure increases parts, increases cost, improves processing and installation difficulty, and is unfavorable for compact space layout and mass production modes. In addition to the dedicated high pressure control oil circuit, lubrication oil passages are also required to achieve lubrication of the components.

Therefore, how to simplify and optimize the structure of the input shaft in a limited space without increasing the cost or even reducing the cost is a current urgent problem to be solved.

Disclosure of Invention

An object of the present disclosure is to provide a transmission input shaft structure and a vehicle, which can realize both power transmission and provision of a high-pressure oil passage and a lubricating oil passage in a limited input shaft space, thereby being capable of improving the compactness of the transmission input shaft structure and reducing the production cost.

A first aspect of the present disclosure provides a transmission input shaft structure comprising: an input shaft including opposite input and output ends; the input shaft is internally provided with at least three oil passing channels communicated with the outside, and the oil passing channels are arranged at intervals in the circumferential direction around the axis of the input shaft and extend along the axial direction of the input shaft; at least three of the oil passages include at least one high-pressure oil passage and at least one lubricating oil passage.

In an exemplary embodiment of the present disclosure, the inlet of the lubrication oil passage extends through an end face of the output end of the input shaft.

In one exemplary embodiment of the present disclosure, the outlet of the lubrication oil passage penetrates through an outer peripheral wall of the input shaft and an inner peripheral wall of the lubrication oil passage.

In one exemplary embodiment of the present disclosure, the inlet of the high-pressure oil passage penetrates through an outer peripheral wall of the input shaft and an inner peripheral wall of the high-pressure oil passage.

In an exemplary embodiment of the disclosure, the inlet of the high-pressure oil channel includes a first oil inlet and a second oil inlet which are communicated, and the two inlets are coaxially arranged; the first oil inlet is positioned between the high-pressure oil channel and the second oil inlet, and penetrates through the inner peripheral wall of the high-pressure oil channel, and the second oil inlet penetrates through the outer peripheral wall of the input shaft; the inner diameter of the first oil inlet is smaller than that of the second oil inlet.

In an exemplary embodiment of the disclosure, a sealing ring is disposed on an inner wall of the second oil inlet.

In an exemplary embodiment of the present disclosure, further comprising: two clutches which are connected with the peripheral wall of the input shaft and are arranged in the axial direction of the input shaft; the clutch has a piston cavity; the oil passing channel comprises two high-pressure oil channels, and outlets of the two high-pressure oil channels are communicated with piston cavities of the two clutches in one-to-one correspondence; the outlet of the high-pressure oil channel penetrates through the outer peripheral wall of the input shaft and the inner peripheral wall of the high-pressure oil channel.

In one exemplary embodiment of the present disclosure, the high pressure oil passage has opposite ends, one of which is located at a middle portion of the input shaft; the other end is positioned at the output end of the input shaft and is provided with an opening penetrating through the output end; and a plug is also arranged in the opening.

In an exemplary embodiment of the present disclosure, the oil passage is arranged at equal intervals in a circumferential direction of an axial center of the input shaft.

A second aspect of the present disclosure provides a vehicle comprising: a transmission input shaft arrangement as claimed in any preceding claim, and an engine and power take-off mechanism; the input end of the input shaft is connected with the engine, and the output end of the input shaft is connected with the power output mechanism.

The beneficial effect of this disclosed scheme:

the scheme of the disclosure integrates the oil passage in the input shaft, so that the input shaft can not only transmit power, but also provide a high-pressure oil passage and a lubricating oil passage. Because the oil passing channel is not required to be arranged outside the input shaft, the installation procedures of an additional oil pipe and a positioning device are reduced, and the processing procedures of the oil hole are simplified. In addition, compare in the axle center and the oil passage of arranging in both sides, in this scheme, the oil passage is arranged around the input shaft axle center at circumference interval, can improve the utilization ratio of input shaft inner space.

Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the disclosure.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

FIG. 1 illustrates a radial cross-sectional view of a transmission input shaft structure in accordance with an embodiment of the present disclosure;

FIG. 2 is a cross-sectional view of a transmission input shaft structure in accordance with an embodiment of the present disclosure, taken along the direction A-A shown in FIG. 1;

FIG. 3 is a cross-sectional view of a transmission input shaft structure in accordance with an embodiment of the present disclosure, taken along the direction B-B shown in FIG. 1.

Reference numerals illustrate:

1. an input shaft; 1a, an input end; 1b, an output end; 2. a clutch; 21. a first clutch; 22. a second clutch; 2a, clutch inner cavity; 21a, a first clutch inner; 22a, a second clutch inner; 2b, a piston cavity; 21b, a first piston chamber; 22b, a second piston chamber; 3. a high pressure oil passage; 31. a first high-pressure oil passage; 32. a second high-pressure oil passage; 4. a lubrication oil passage; 5. an oil passage; 6. an outlet of the high pressure oil passage; 7. an inlet of the high pressure oil channel; 71. a first oil inlet; 72. a second oil inlet; 8. an outlet of the lubrication oil passage; 9. an inlet for a lubricant passageway; 10. a plug; 11. a first spline; 12. a second spline; 13. a first shaft section; 14. a second shaft section.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.

In this disclosure, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

Example 1

As shown in fig. 1-3, embodiments of the present disclosure provide a transmission input shaft structure comprising: an input shaft 1, the input shaft 1 including opposite input and output ends 1a and 1b; the input shaft 1 is internally provided with at least three oil passing channels 5 communicated with the outside, and the oil passing channels 5 are arranged at intervals in the circumferential direction around the axis of the input shaft 1 and extend along the axial direction of the input shaft 1; the at least three oil passages 5 include at least one high-pressure oil passage 3 and at least one lubricating oil passage 4.

The structure integrates the high-pressure oil channel 3 and the lubricating oil channel 4 in the input shaft 1 and is distributed at intervals in the circumferential direction around the axis of the input shaft 1, so that the space layout is more compact, peripheral oil pipes and other parts can be simplified, the integral matching surface of the transmission input shaft structure is reduced, the precision requirement is reduced, and the finished product processing rate is improved. Therefore, the transmission input shaft structure can realize torque transmission, support and lubrication integrated design, and the cost is reduced.

The following will make a detailed description with reference to the accompanying drawings.

In some embodiments, the transmission input shaft structure may be applied to a two-speed hybrid transmission to effect a shift of two speed ratio modes. In other embodiments, the transmission input shaft configuration may also be applied to a multi-speed power transmission.

Correspondingly, two clutches 2 can also be provided on the outer circumferential wall of the input shaft 1. The clutch 2 can cut off the transmission of power at the time of gear shifting, thereby reducing the shock and ensuring the smoothness at the time of gear shifting. The two clutches 2 are arranged in the axial direction of the input shaft 1 and can be connected to the outer peripheral wall of the input shaft 1 by welding. The two clutches 2 are a first clutch 21 and a second clutch 22, respectively.

The clutch 2 may have a clutch cavity 2a and a piston cavity 2b therein, independent of each other. Specifically, the first clutch 21 has a first clutch inner chamber 21a and a first piston chamber 21b; the second clutch 22 has a second clutch inner chamber 22a and a second piston chamber 22b. Lubricating oil can enter the clutch cavity 2a so as to enable the clutch 2 to work more smoothly; high pressure oil may enter the piston chamber 2b to control operation of the clutch 2.

The input shaft 1 will be described in detail below.

The input 1a of the input shaft 1 may receive the rotational speed and torque of the engine, and its output 1b may transmit the rotational speed and torque to the power take-off structure.

A second spline 12 may be provided on the outer peripheral wall of the input shaft 1 near the input end 1a, and the second spline 12 may be connected with a torque damper to reduce vibration. The torsional vibration damper mainly comprises an elastic element, a damping element and the like, wherein the elastic element is used for avoiding excitation caused by an engine; the damping element is used for effectively dissipating vibration energy.

Between the second clutch 22 and the input 1a, the periphery of the input shaft 1 comprises a first shaft section 13 and a second shaft section 14. Wherein the first shaft section 13 is closer to the input 1a and the second shaft section 14 is closer to the second clutch 22. The input shaft 1 may be mounted in a housing provided with bearing blocks, and the first shaft section 13 of the input shaft 1 may be provided with bearings mounted in cooperation with the bearing blocks in the housing.

A deep groove ball bearing is provided at the second shaft section 14, which can be connected by a gear to a spline, which is connected to the second clutch 22. The deep groove ball bearing has the advantages of small friction resistance and high rotating speed. In addition, the deep groove ball bearing can be directly aligned with the outlet 8 of a lubricating oil channel, so that the running is smoother.

The input shaft 1 is provided with a second spline 12 on the outer peripheral wall near the output end 1b, the second spline 12 being connected to a gear wheel connected to a needle bearing, the needle bearing being connected to the first clutch 21 via another gear wheel.

Referring to fig. 1-3 in combination, in some embodiments, the oil passage 5 in the input shaft 1 may be provided in three. One of which is a lubricating oil channel 4 and the other two of which are high-pressure oil channels 3. Specifically, the two high-pressure oil passages 3 are a first high-pressure oil passage 31 and a second high-pressure oil passage 32, respectively. In other embodiments, three or more oil passages 5 may be provided, and the number of the lubricating oil passages 4 and the high-pressure oil passages 3 may be designed according to actual needs.

It should be noted that the input shaft 1 may be a solid structure, and the oil passing channel 5 may be formed by punching inward at one end of the input shaft 1, that is, one end of the oil passing channel 5 has an opening, and the other end is a closed end. In some embodiments, holes may be punched from the output end 1b of the input shaft 1, thereby forming the oil passage 5. The oil passage 5 is independent from each other, so that influence of each other is avoided.

Further, the oil passage 5 is arranged at equal intervals in the circumferential direction of the shaft center of the input shaft 1, so that the spatial layout of the oil passage 5 in the input shaft 1 can be optimized. In addition, the ratio of the inner diameters of the high-pressure oil channel 3 and the lubricating oil channel 4 in the oil passing channel 5 can be adjusted according to actual needs, so that the flow rate of the high-pressure oil and the flow rate of the lubricating oil in unit time can be adjusted.

The lubrication oil passage 4 will be described in detail below.

An inlet 9 of the lubrication oil passage penetrates the end face of the output end 1b of the input shaft 1. That is, the original opening of the lubricating oil channel 4 can be used as the inlet 9 of the lubricating oil channel, so that no special inlet is needed, the working procedure is simpler, and the production cost is lower. In addition, since the pressure of the lubricating oil itself is low, when entering the input shaft 1 from one end of the lubricating oil passage 4, a large pressure is not caused to the structure of the input shaft 1, so that the input shaft 1 can maintain a good strength and rigidity.

The outlet 8 of the lubrication oil passage penetrates the outer peripheral wall of the input shaft 1 and the inner peripheral wall of the lubrication oil passage 4. In some embodiments, the outlet 8 of the lubrication channel may extend in a radial direction of the input shaft 1; in other embodiments, the lubrication channel 4 may extend diagonally. The outlets 8 of the lubrication channels may be plural to lubricate a plurality of parts on the periphery. Preferably, the outlet 8 of the lubricating oil channel can be flexibly arranged on the input shaft 1 according to different positions of the part to be lubricated so as to directly align the part to be lubricated, thereby improving the effects of lubrication and cooling and reducing the loss of the lubricating oil. Further, the outlets 8 of the plurality of lubricating oil passages may be arranged on the same straight line, so that the processing thereof is simpler and the operation is easy.

In this way, lubrication oil can enter the lubrication oil channel 4 from the inlet 9 of the lubrication oil channel and flow out along the outlet 8 of the lubrication oil channel to achieve peripheral component lubrication. For example, the outlet 8 of the lubrication oil passage may communicate with the clutch cavity 2 a. The lubricating oil can improve the running smoothness, the transmission efficiency, the service life and other performances of the whole system.

The high-pressure oil passage 3 will be described in detail below.

The high-pressure oil passage 3 can be understood as a control oil passage for controlling the operation of the clutch 2. The inlet 7 of the high-pressure oil passage penetrates the outer peripheral wall of the input shaft 1 and the inner peripheral wall of the high-pressure oil passage 3. Since the high-pressure oil is control oil, the pressure is large, and therefore, when the inlet is provided in the circumferential direction of the input shaft 1, the pressure of the high-pressure oil to the input shaft 1 can be reduced, thereby avoiding deformation of the input shaft 1.

The inlet 7 of the high-pressure oil channel comprises a first oil inlet 71 and a second oil inlet 72 which are communicated, and the two inlets are coaxially arranged; the first oil inlet 71 is positioned between the high-pressure oil channel 3 and the second oil inlet 72, the first oil inlet 71 penetrates through the inner peripheral wall of the high-pressure oil channel 3, and the second oil inlet 72 penetrates through the outer peripheral wall of the input shaft 1; the inner diameter of the first oil inlet 71 is smaller than the inner diameter of the second oil inlet 72. That is, the second oil inlet 72 may serve as an installation position of the external oil inlet pipe such that it can be caught at the second oil inlet 72, thereby improving the stability of installation.

Further, a seal ring is provided on the inner wall of the second oil inlet 72. When the external oil inlet pipeline is installed in the second oil inlet 72, the sealing ring can be attached to the outer wall of the external oil inlet pipeline, so that high-pressure oil is prevented from leaking from the second oil inlet 72. The external oil inlet pipeline can be provided with an electromagnetic valve so as to control the circulation state of high-pressure oil.

In this embodiment, the outlets 6 of the two high-pressure oil passages are in one-to-one correspondence with the piston chambers 2b of the two clutches 2, so that one high-pressure oil passage 3 can control the operation of one clutch 2. Specifically, as shown in fig. 2, the first high-pressure oil passage 31 communicates with the second piston chamber 22 b; as shown in fig. 3, the second high-pressure oil passage 32 communicates with the first piston chamber 21 b. Further, the outlet 6 of the high-pressure oil passage penetrates the outer peripheral wall of the input shaft 1 and the inner peripheral wall of the high-pressure oil passage 3. The outlet 6 of the high-pressure oil passage may extend in the radial direction of the input shaft 1 or may extend in an oblique direction.

The high-pressure oil channel 3 has opposite ends, one of which is located in the middle of the input shaft 1; the other end is positioned at the output end 1b of the input shaft 1 and is provided with an opening penetrating through the output end 1b; a plug 10 is also arranged in the opening to realize the oil sealing effect. The plug 10 may be an auxetic plug which is inserted into the inner peripheral wall of the input shaft 1 by means of outwardly expanding screw grooves, thereby making the installation more secure.

In this way, the high-pressure oil can sequentially enter the high-pressure oil channel 3 through the inlet 7 of the high-pressure oil channel and flow out through the outlet 6 of the high-pressure oil channel, so as to enter the piston cavity 2b of the clutch 2 and control the operation of the clutch 2.

In summary, the present disclosure is based on the limited space, fully utilizes the structural features of the input shaft 1, integrates the high-pressure oil channel 3 and the lubrication channel in the input shaft 1, can effectively ensure the normal operation of the clutch 2, and simultaneously ensures the lubrication and cooling of all peripheral parts without adding other additional components, so that the device is simpler and has lower cost and economy. In addition, the transmission input shaft structure is good in strength and rigidity and compact in layout.

Example two

The present embodiment provides a vehicle including: the transmission input shaft configuration of embodiment one, as well as the engine and power take-off mechanism (not shown); the same or similar parts as those of the foregoing embodiments are referred to the detailed description of the foregoing embodiments, and are not repeated herein.

The input shaft has an input end coupled to the engine for receiving rotational speed and torque transmitted by the engine. The output end of the input shaft is connected with the power output mechanism to drive the wheels to run.

The transmission input shaft structure is simple and convenient to assemble, high in manufacturability, good in lubrication effect, compact in structure and high in strength, so that the competitiveness of the whole vehicle can be improved.

In the description of the present specification, a description of the terms "some embodiments," "exemplary," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present disclosure have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the present disclosure, and that variations, modifications, alternatives, and variations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure, which is therefore intended to be within the scope of the present disclosure as defined by the claims and specification.

Claims (10)

1. A transmission input shaft structure, comprising:

an input shaft including opposite input and output ends;

the input shaft is internally provided with at least three oil passing channels communicated with the outside, and the oil passing channels are arranged at intervals in the circumferential direction around the axis of the input shaft and extend along the axial direction of the input shaft; at least three of the oil passages include at least one high-pressure oil passage and at least one lubricating oil passage.

2. The transmission input shaft structure of claim 1, wherein the inlet of the lubrication oil passage extends through an end face of the output end of the input shaft.

3. The transmission input shaft structure of claim 1, wherein the outlet of the lubrication oil passage extends through an outer peripheral wall of the input shaft and an inner peripheral wall of the lubrication oil passage.

4. The transmission input shaft structure of claim 1 wherein,

the inlet of the high-pressure oil channel penetrates through the outer peripheral wall of the input shaft and the inner peripheral wall of the high-pressure oil channel.

5. The transmission input shaft structure of claim 4, wherein the inlet of the high pressure oil passage comprises a first oil inlet and a second oil inlet which are communicated, and the first oil inlet and the second oil inlet are coaxially arranged; the first oil inlet is positioned between the high-pressure oil channel and the second oil inlet, and penetrates through the inner peripheral wall of the high-pressure oil channel, and the second oil inlet penetrates through the outer peripheral wall of the input shaft; the inner diameter of the first oil inlet is smaller than that of the second oil inlet.

6. The transmission input shaft structure of claim 5, wherein an inner wall of the second oil inlet is provided with a seal ring.

7. The transmission input shaft structure of claim 1, further comprising: two clutches which are connected with the peripheral wall of the input shaft and are arranged in the axial direction of the input shaft; the clutch has a piston cavity;

the oil passing channel comprises two high-pressure oil channels, and outlets of the two high-pressure oil channels are communicated with piston cavities of the two clutches in one-to-one correspondence;

the outlet of the high-pressure oil channel penetrates through the outer peripheral wall of the input shaft and the inner peripheral wall of the high-pressure oil channel.

8. The transmission input shaft structure of claim 1 wherein,

the high-pressure oil channel is provided with two opposite ends, and one end of the high-pressure oil channel is positioned in the middle of the input shaft; the other end is positioned at the output end of the input shaft and is provided with an opening penetrating through the output end;

and a plug is also arranged in the opening.

9. The transmission input shaft structure according to claim 1, wherein the oil passage is arranged at equal intervals in a circumferential direction of an axial center of the input shaft.

10. A vehicle, characterized by comprising:

a transmission input shaft structure as claimed in any one of claims 1 to 9, and an engine and power take-off mechanism;

the input end of the input shaft is connected with the engine, and the output end of the input shaft is connected with the power output mechanism.

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