Transmission lubrication structure and transmission

Abstract

The present invention discloses a transmission lubrication structure and a transmission, wherein the transmission lubrication structure includes a housing structure, an oil spray pipe and an oil pumping device. An oil passage is formed inside the housing structure, and the oil passage is formed with a passage outlet at the upper end and a passage inlet at the lower end. The oil spray pipe is provided in the housing structure and is connected to the passage outlet. A first oil spray hole is formed on the wall of the oil spray pipe, and the first oil spray hole is arranged to face the rotation direction of the corresponding gear shaft transmission structure. The oil pumping device is connected to the passage inlet and is arranged to pump the oil flowing back into the oil return chamber into the oil passage. The oil pumping device can pump the oil in the transmission oil return chamber into the oil passage, so that the oil therein is sprayed onto the gear shaft transmission structure along the rotation direction of the gear shaft transmission structure through the first oil spray hole on the oil spray pipe, thereby effectively reducing the impact and agitation of the oil by the gear shaft transmission structure.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission lubrication, and in particular to a transmission lubrication structure and a transmission. Background Art

[0002] Typically, transmission lubrication systems use the high-speed operation of the transmission gear pair to stir the lubricating oil, which then splashes onto the parts requiring lubrication or is collected by an oil collection device and then delivered to the parts requiring lubrication. In principle, splash lubrication consumes some mechanical energy, resulting in energy loss and reducing the transmission's effective mechanical transmission efficiency. Summary of the Invention

[0003] The main purpose of the present invention is to propose a transmission lubrication structure and a transmission, aiming to solve the problem of reducing mechanical transmission efficiency by lubricating the existing gear pair by rotating and stirring the lubricating oil.

[0004] To achieve the above objectives, the transmission lubrication structure proposed by the present invention includes:

[0005] The shell structure has an oil passage formed therein, wherein the oil passage has a passage outlet at an upper end and a passage inlet at a lower end;

[0006] an oil injection pipe, disposed in the housing structure and connected to the channel outlet, wherein a first oil injection hole is formed on a wall of the oil injection pipe, and the first oil injection hole is arranged to face the forward rotation direction of the corresponding gear shaft transmission structure; and

[0007] The oil pumping device is connected to the inlet of the channel and is used to pump the oil flowing back into the oil return chamber into the oil passage.

[0008] Optionally, a plurality of the first oil injection holes are provided along the length direction of the oil injection pipe to correspond to a plurality of gear shaft transmission structures.

[0009] Optionally, the oil injection pipe is further formed with an extension branch pipe arranged toward the rotation direction of the corresponding gear shaft transmission structure, and the extension branch pipe is arranged to be inclined downward;

[0010] The first oil injection hole is formed in the extended branch pipe.

[0011] Optionally, the oil injection pipe is further formed with a second oil injection hole opposite to the first oil injection hole, and the second oil injection hole is arranged to face the opposite rotation direction of the corresponding gear shaft transmission structure;

[0012] The transmission lubrication structure further includes:

[0013] a switching valve disposed in the fuel injection pipe, the switching valve having a movable blocking structure, wherein the blocking structure can block the first fuel injection hole or the second fuel injection hole during its movable stroke; and

[0014] The driving structure is used to drive the blocking structure to move according to the forward and reverse rotation of the gear shaft transmission structure.

[0015] Optionally, the oil pumping device includes an electronic pump provided in the housing structure, an oil pumping port of the electronic pump is arranged to be connected to the channel inlet, and an oil suction port of the electronic pump is arranged to be connected to the oil return chamber.

[0016] Optionally, a sealing gasket is provided between the fuel injection pipe and the housing structure.

[0017] To achieve the above objectives, the transmission proposed by the present invention includes the transmission lubrication structure described in the above technical solution.

[0018] Optionally, the transmission comprises:

[0019] A transmission housing comprises an intermediate housing and a rear housing which are arranged opposite to each other, so as to form a mounting cavity and an oil return cavity at the bottom of the mounting cavity therebetween; and

[0020] A gear shaft transmission structure is rotatably disposed in the mounting cavity;

[0021] Wherein, the housing structure includes the rear housing, and the two ends of the fuel injection pipe are respectively arranged on the opposite side walls of the intermediate housing and the rear housing;

[0022] The oil pump device is arranged on the rear housing and is respectively connected to the oil return chamber and the channel inlet.

[0023] Optionally, the middle portion of the fuel injection pipe is connected to the upper side wall of the installation cavity through a supporting structure.

[0024] Optionally, the transmission comprises a longitudinal dual clutch transmission.

[0025] In the technical solution provided by the present invention, the oil pumping device is used to pump the oil flowing back into the return oil chamber into the oil passage in the housing structure, and then the oil can be sprayed out corresponding to the gear shaft transmission structure through the first oil spray hole arranged in the oil spray pipe at the upper end to produce cooling and lubrication effects. The gear shaft transmission structure will not lose mechanical energy due to the stirring of the oil at the bottom. At the same time, since the direction of the first oil spray hole corresponds to the forward rotation direction of the gear shaft transmission structure, the oil discharged from the first oil spray hole can minimize the impact on the gear shaft transmission structure to the greatest extent, reduce energy loss, and ensure the transmission efficiency of the transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 A schematic cross-sectional view of an embodiment of a transmission provided by the present invention;

[0028] Figure 2 for Figure 1 Schematic diagram of the transmission structure from another perspective.

[0029] Description of Figure Numbers:

[0030] Label name Label name 100 Transmission lubrication structure 1000 transmission 1 Shell structure 200 transmission housing 11 Oil passage 210 rear housing 2 fuel injection pipe 220 Intermediate housing 21 Extended management 230 Mounting cavity 3 Oil pump device 231 Oil return chamber 31 electronic pump 300 Gear shaft transmission structure 4 Sealing gasket 400 Support structure

[0031] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] It should be noted that if a directional indication is involved in an embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] Typically, transmission lubrication systems use the high-speed operation of the transmission gear pair to stir the lubricating oil, which then splashes onto the parts requiring lubrication or is collected by an oil collection device and then delivered to the parts requiring lubrication. In principle, splash lubrication consumes some mechanical energy, resulting in energy loss and reducing the transmission's effective mechanical transmission efficiency.

[0036] In view of this, the present invention proposes a transmission lubrication structure and a transmission, which aims to solve the problem of reducing mechanical transmission efficiency by rotating and stirring lubricating oil in the existing gear pair. Figures 1 to 2 This is a structural schematic diagram of an embodiment of the transmission lubrication structure provided by the present invention.

[0037] See also Figures 1 to 2 The transmission lubrication structure 100 includes a housing structure 1, an oil injection pipe 2 and an oil pumping device 3. An oil passage 11 is formed inside the housing structure 1. The oil passage 11 is formed with a channel outlet at the upper end and a channel inlet at the lower end. The oil injection pipe 2 is arranged in the housing structure 1 and is connected to the channel outlet. A first oil injection hole is formed on the tube wall of the oil injection pipe 2. The first oil injection hole is set to face the positive rotation direction of the corresponding gear shaft transmission structure 300. The oil pumping device 3 is connected to the channel inlet to pump the oil flowing back to the return oil chamber 231 into the oil passage 11.

[0038] In the technical solution provided by the present invention, the oil pumping device 3 is used to pump the oil returning to the return oil chamber 231 into the oil passage 11 in the housing structure 1, and then the oil can be sprayed out corresponding to the gear shaft transmission structure 300 through the first oil spray hole arranged in the oil spray pipe 2 at the upper end to produce cooling and lubrication effects. The gear shaft transmission structure 300 will not lose mechanical energy due to the stirring of the oil at the bottom. At the same time, since the direction of the first oil spray hole is corresponding to the forward rotation direction of the gear shaft transmission structure 300, the oil discharged from the first oil spray hole can minimize the impact on the gear shaft transmission structure 300 to the greatest extent, reduce energy loss, and ensure the transmission efficiency of the transmission.

[0039] Because the gear transmission structures 300 within the gearbox require multiple combinations to achieve gear shifting, there are a large number of these gear transmission structures 300. Accordingly, in this embodiment, multiple first oil spray holes are provided along the length of the oil spray pipe 2 to correspond to the multiple gear transmission structures 300. The multiple oil spray pipes 2 can spray lubricating oil to the multiple gear transmission structures 300, ensuring that each gear transmission structure 300 receives adequate lubrication and cooling.

[0040] It is understandable that simply providing the first oil spray hole in the oil spray pipe 2 makes it difficult to control the direction of oil spraying, which can easily lead to skewed oil spraying. Therefore, in this embodiment, the oil spray pipe 2 further includes an extension branch pipe 21, which is arranged in the direction of rotation of the corresponding gear transmission structure 300. The extension branch pipe 21 is arranged downwardly and tilted. The first oil spray hole is formed in the extension branch pipe 21. The extension branch pipe 21 on the oil spray pipe 2 allows oil to be sprayed accurately in the extension direction, thereby ensuring stable lubrication of the gear transmission structure 300.

[0041] It can be understood that when the vehicle is shifted into reverse gear, part of the gear shaft transmission structure 300 will rotate in the opposite direction. In order to ensure that the gear shaft transmission structure 300 can also be lubricated during the reversal period and the problem of oil stirring will not occur, in this embodiment, a second fuel injection hole opposite to the first fuel injection hole is also formed on the fuel injection pipe 2, and the second fuel injection hole is used to be set in the reverse rotation direction of the corresponding gear shaft transmission structure 300. The transmission lubrication structure 100 also includes a switching valve and a drive structure. The switching valve is arranged in the fuel injection pipe 2, and the switching valve has a blocking structure that can be movably set. In its movable stroke, the blocking structure can block the first fuel injection hole or the second fuel injection hole, and the drive structure is used to drive the blocking structure to move according to the forward and reverse rotation of the gear shaft transmission structure 300. When the gear shaft transmission structure 300 rotates forward, the driving structure can obtain the forward rotation information and drive the blocking structure to block the second oil injection hole accordingly, and the oil injection pipe 2 can spray oil through the first oil injection hole along the forward rotation direction of the gear shaft transmission structure 300. When the gear shaft transmission structure 300 rotates backward, the driving structure can obtain the forward rotation information and drive the blocking structure to block the first oil injection hole accordingly, and the oil injection pipe 2 can spray oil through the second oil injection hole along the reverse direction of the gear shaft transmission structure 300. The switching valve can be a solenoid valve or a hydraulic valve.

[0042] It should be explained that the drive structure can obtain the forward and reverse rotation information of the gear shaft transmission structure 300 by being electrically connected to the vehicle's main control board, or by detecting through a forward and reverse rotation detection sensor, and the embodiment of the present invention does not limit this; the drive structure can drive the blocking structure on the switching valve by electromagnetic drive, or by oil pressure drive, and the embodiment of the present invention does not limit this.

[0043] It is understandable that a conventional mechanical oil pump can only pump oil continuously but cannot control the amount of oil pumped according to actual lubrication needs. Specifically, in this embodiment, the oil pumping device 3 includes an electronic pump 31 disposed on the housing structure 1. The oil pump port of the electronic pump 31 is configured to communicate with the channel inlet, and the oil suction port of the electronic pump 31 is configured to communicate with the oil return chamber 231. By using the electronic pump 31, the oil pumping volume can be adjusted according to actual lubrication needs by controlling the speed, thereby achieving on-demand oil pumping. This can effectively reduce the energy loss caused by oil stirring and lubrication of the gear shaft transmission structure 300 and improve the overall transmission efficiency of the transmission.

[0044] Since the fuel injection pipe 2 is generally installed on the housing structure 1 at a later stage, it inevitably faces the problem of oil sealing. In view of this, in this embodiment, a sealing gasket 4 is provided between the fuel injection pipe 2 and the housing structure 1. The provision of the sealing gasket 4 can effectively provide a seal, prevent oil leakage at the installation point of the fuel injection pipe 2 and the housing structure 1, and ensure the efficient passage of oil.

[0045] Furthermore, to achieve the above-mentioned objectives, the present invention further provides a transmission 1000, comprising the transmission lubrication structure 100 described in the above-mentioned technical solution. It should be noted that the detailed structure of the transmission lubrication structure 100 of the transmission 1000 can be referred to the above-mentioned embodiments of the transmission lubrication structure 100, and will not be further described here. Since the above-mentioned transmission lubrication structure 100 is used in the transmission 1000 of the present invention, the embodiments of the transmission 1000 of the present invention include all technical solutions of all embodiments of the above-mentioned transmission lubrication structure 100, and the technical effects achieved are also identical, and will not be further described here.

[0046] Furthermore, in this embodiment, the transmission 1000 includes a transmission housing 200 and a pinion transmission structure 300. The transmission housing 200 includes an intermediate housing 220 and a rear housing 210 disposed opposite each other, forming a mounting cavity 230 and an oil return cavity 231 at the bottom of the mounting cavity 230 therebetween. The pinion transmission structure 300 is rotatably mounted within the mounting cavity 230. The housing structure 1 includes the rear housing 210. The ends of the oil injection pipe 2 are disposed on opposing sidewalls of the intermediate housing 220 and the rear housing 210, respectively. The oil pumping device 3 is disposed within the rear housing 210 and connects the oil return cavity 231 to the channel inlet. Since the pinion transmission structure 300 is generally long, the oil injection pipe 2 generally also needs to be long. Disposing the ends of the longer oil injection pipe 2 on the intermediate housing 220 and the rear housing 210, respectively, increases the mounting stability of the oil injection pipe 2 and prevents it from falling off.

[0047] In the above embodiment, the fuel injection pipe 2 is connected to the transmission housing 200 only at its two ends, and the long, suspended portion in the middle may be subject to bending stress. To reduce the connection pressure at both ends of the fuel injection pipe 2 and prevent the fuel injection pipe 2 from bending and deformation, in this embodiment, the middle portion of the fuel injection pipe 2 is connected to the upper side wall of the mounting cavity 230 via a support structure 400. The support structure 400 increases the number of connection points of the fuel injection pipe 2, thereby reducing the risk of bending, deformation, or falling off of the fuel injection pipe 2.

[0048] The support structure 400 may be fastened with a bolt or with a cable tie, which is not limited in the embodiment of the present invention.

[0049] Specifically, the transmission 1000 includes a longitudinal dual-clutch transmission.

[0050] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A transmission lubrication structure, characterized in that: include: The shell structure has an oil passage formed therein, wherein the oil passage has a passage outlet at an upper end and a passage inlet at a lower end; an oil injection pipe, disposed in the housing structure and connected to the channel outlet, wherein a first oil injection hole is formed on a wall of the oil injection pipe, and the first oil injection hole is arranged to face the forward rotation direction of the corresponding gear shaft transmission structure; as well as, An oil pumping device, connected to the inlet of the channel, for pumping the oil returning to the oil return chamber into the oil passage; The oil injection pipe is further formed with a second oil injection hole opposite to the first oil injection hole, and the second oil injection hole is arranged to face the opposite rotation direction of the corresponding gear shaft transmission structure; The transmission lubrication structure further includes: a switching valve disposed in the fuel injection pipe, the switching valve having a movable blocking structure, wherein the blocking structure can block the first fuel injection hole or the second fuel injection hole during its movable stroke; as well as, A driving structure for driving the blocking structure to move according to the forward and reverse rotation of the gear shaft transmission structure; The oil pumping device includes an electronic pump provided in the housing structure. The oil pumping port of the electronic pump is arranged to be connected to the channel inlet, and the oil suction port of the electronic pump is arranged to be connected to the oil return chamber.

2. The transmission lubrication structure according to claim 1, characterized in that: The first oil injection holes are arranged in plurality along the length direction of the oil injection pipe corresponding to a plurality of gear shaft transmission structures.

3. The transmission lubrication structure according to claim 1, characterized in that: The oil injection pipe is further formed with an extension branch pipe arranged toward the rotation direction of the corresponding gear shaft transmission structure, and the extension branch pipe is arranged downwardly in an inclined manner; The first oil injection hole is formed in the extended branch pipe.

4. The transmission lubrication structure according to claim 1, wherein: A sealing gasket is provided between the fuel injection pipe and the housing structure.

5. A transmission, characterized in that: The transmission lubrication structure comprises the transmission lubrication structure according to any one of claims 1 to 4.

6. The transmission according to claim 5, wherein: The transmission comprises: A transmission housing comprises an intermediate housing and a rear housing which are arranged opposite to each other, so as to form a mounting cavity and an oil return cavity at the bottom of the mounting cavity therebetween; and A gear shaft transmission structure is rotatably disposed in the mounting cavity; Wherein, the housing structure includes the rear housing, and the two ends of the fuel injection pipe are respectively arranged on the opposite side walls of the intermediate housing and the rear housing; The oil pump device is arranged on the rear housing and is respectively connected to the oil return chamber and the channel inlet.

7. The transmission according to claim 6, wherein: The middle portion of the fuel injection pipe is connected to the upper side wall of the installation cavity through a supporting structure.

8. The transmission according to claim 5, wherein: The transmission comprises a longitudinal dual clutch transmission.

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