A transmission with hydraulic oil circuit structure

Abstract

The present invention discloses a transmission with a hydraulic oil circuit structure, including an input shaft, an output shaft, an intermediate shaft, a switching dual clutch, a housing and an oil circuit structure, wherein the oil circuit structure includes a housing oil circuit, a shaft oil circuit and a clutch oil circuit. The transmission controls the change of gears through a switching dual clutch, so that power can be output through the input shaft, the intermediate shaft and the output shaft, or through the input shaft and the output shaft. In addition, the switching dual clutch transports hydraulic oil through the housing oil circuit, the shaft oil circuit and the clutch oil circuit, thereby performing a clutch operation on the switching dual clutch. The oil circuit structure operates in a state of being filled with hydraulic oil during use, so only a small amount of hydraulic oil needs to be adjusted to break the oil pressure balance in the piston chamber of the switching dual clutch, thereby driving the switching dual clutch to perform mutually exclusive clutch operations, thereby achieving the effect of zero-time waiting for switching clutches.

Description

Technical Field

[0001] The invention relates to the field of transmissions, and in particular to a transmission with a hydraulic oil circuit structure. Background Art

[0002] The clutch is located in the flywheel housing between the engine and the gearbox. The clutch assembly is fixed to the rear plane of the flywheel with screws. The output shaft of the clutch is the input shaft of the gearbox. The engine and the gearbox are temporarily separated and gradually engaged by controlling the clutch to cut off or transfer the power input from the engine to the transmission. However, the existing clutch has a relatively long reaction time when engaging or disengaging, and the consumption of kinetic energy is also increased. Summary of the invention

[0003] Therefore, it is necessary to provide an oil circuit structure of a clutch of a transmission to solve the problem that the existing clutch takes a long time to engage and disengage.

[0004] To achieve the above-mentioned purpose, the inventor provides a transmission with a hydraulic oil circuit structure, including an input shaft, an output shaft, an intermediate shaft, a switchable dual clutch, a housing and an oil circuit structure; the center line of the input shaft and the center line of the output shaft are arranged in a colinear manner, and the input end of the input shaft and the output end of the output shaft respectively penetrate the opposite side walls of the housing and are arranged on the housing, the input shaft is transmission-connected with the input end of the intermediate shaft, the output end of the intermediate shaft is transmission-connected with the output shaft, and the center line of the intermediate shaft is parallel to the center line of the input shaft and is arranged in the housing; the switchable dual clutch is arranged on the input shaft or the output shaft, and the switchable dual clutch is located between two adjacent teeth on the input shaft and / or the output shaft. The switchable dual clutch is used to control the gear pairs on both sides of the switchable dual clutch to perform mutually exclusive clutch operation; the oil circuit structure includes a housing oil circuit, a shaft oil circuit and a clutch oil circuit, the housing oil circuit is arranged in the housing, the shaft oil circuit is arranged in the input shaft or the output shaft, one branch of the housing oil circuit is connected to the first oil delivery circuit of the shaft oil circuit, and the other branch of the housing oil circuit is connected to the second oil delivery circuit of the shaft oil circuit; the clutch oil circuit is arranged in the switchable dual clutch cavity, the first oil delivery circuit of the shaft oil circuit is connected to the first oil guide channel of the clutch oil circuit; the second oil delivery circuit of the shaft oil circuit is connected to the second oil guide channel of the clutch oil circuit.

[0005] Furthermore, the housing oil circuit is a double-hole oil delivery circuit, the oil inlet of the double-hole oil delivery circuit is arranged on the outer side of the housing, and the oil outlet of the double-hole oil delivery circuit is arranged on the inner side of the shaft hole of the housing input shaft.

[0006] Furthermore, the clutch oil circuit includes a first oil guide channel and a second oil guide channel; the first oil guide channel is arranged between one side of the clutch piston inner cavity and the inner side surface of the clutch inner hole, and the second oil guide channel is arranged between the other side of the clutch piston inner cavity and the inner side surface of the clutch inner hole.

[0007] Furthermore, the switchable dual clutch includes a first clutch block, a second clutch block and a piston unit; the piston unit includes a double-headed piston body and a cavity, the cross-section of the double-headed piston body is an I-shape, one end of the double-headed piston body is arranged in the cavity, and the other end of the double-headed piston body is located outside the cavity, the oil outlet of the first oil guide channel is arranged on one side of the cavity, and the oil outlet of the second oil guide channel is arranged on the other side of the cavity; the first clutch block includes a first friction plate group, and the second clutch block includes a second friction plate group, the first friction plate group is located on one side of the other end of the double-headed piston body, and the second friction plate group is located on the other side of the other end of the double-headed piston body, the first clutch block and the second clutch block are used to be respectively arranged on the gear pairs on both sides, and the double-headed piston body is used to drive one of the first friction plate group or the second friction plate group to engage and the other group to separate.

[0008] Furthermore, sealing rings are provided on the input shafts on both sides of each oil inlet of the shaft oil circuit.

[0009] Furthermore, the sealing ring is an open sealing ring.

[0010] Furthermore, a plurality of intermediate shafts are provided, and the plurality of intermediate shafts are arranged in a circular array around the central axis of the input shaft in the housing.

[0011] Further, the input shaft is provided with a first input gear, the output shaft is provided with a first output gear, and the switchable clutch is provided on the input shaft or the output shaft between the first input gear and the first output gear.

[0012] Further, the intermediate shaft is provided with a second input gear and a second output gear, the first input gear and the second input gear are meshed with each other, and the first output gear and the second output gear are meshed with each other.

[0013] Different from the prior art, the transmission of the above technical solution controls the gear shift through a switchable dual clutch, so that the power can be output through the input shaft, the intermediate shaft and the output shaft, or directly output through the input shaft and the output shaft. In addition, the switchable dual clutch transmits hydraulic oil through the housing oil circuit, the shaft oil circuit and the clutch oil circuit, and then performs the clutch operation on the switchable dual clutch. The oil circuit structure is operated in a state of being full of hydraulic oil during use. Therefore, only a small amount of hydraulic oil needs to be adjusted to break the oil pressure balance in the piston chamber of the switchable dual clutch, and then drive the switchable dual clutch to perform mutually exclusive clutch operation, achieving the effect of zero waiting time for switching clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional view of a transmission with a hydraulic oil circuit structure according to a specific embodiment;

[0015] Figure 2 It is a structural diagram of a transmission with a hydraulic oil circuit structure according to a specific implementation method;

[0016] Figure 3 It is a partial schematic diagram of a transmission with a hydraulic oil circuit structure according to a specific implementation method;

[0017] Description of reference numerals:

[0018] 10. Input shaft; 11. First input gear;

[0019] 20. output shaft; 12. first output gear;

[0020] 30. Intermediate shaft; 31. Second input gear; 32. Second output gear;

[0021] 40. Switchable dual clutch;

[0022] 41. first clutch block; 411. first friction plate group;

[0023] 42. second clutch block; 412. second friction plate group;

[0024] 43. Piston unit;

[0025] 431, double-headed piston body; 432, cavity;

[0026] 50. Shell;

[0027] 60. Oil circuit structure; 61. Housing oil circuit; 62. Shaft oil circuit; 63. Clutch oil circuit;

[0028] 631, first oil guide channel; 632, second oil guide channel;

[0029] 621, first oil delivery passage; 622, second oil delivery passage; 623, sealing ring; DETAILED DESCRIPTION

[0030] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments and accompanying drawings.

[0031] See also Figure 1 , Figure 2 and Figure 3 The present embodiment provides a transmission with a hydraulic oil circuit structure, comprising an input shaft 10, an output shaft 20, an intermediate shaft 30, a switchable dual clutch 40, a housing 50 and an oil circuit structure 60. In the present embodiment, the shaft end of the input shaft can be set in the end face shaft hole of the output shaft through a bearing sleeve, so as to achieve the effect of the center line of the input shaft and the center line of the output shaft being in line with each other, and the input end of the input shaft and the output end of the output shaft are respectively installed on the housing through the opposite side walls of the housing, the input shaft is drivingly connected to the input end of the intermediate shaft, the output end of the intermediate shaft is drivingly connected to the output shaft, and the center line of the intermediate shaft is parallel to the center line of the input shaft and is arranged in the housing.

[0032] In this embodiment, the input shaft is provided with a first input gear 11, the output shaft is provided with a first output gear 21, and the intermediate shaft is provided with a second input gear 31 and a second output gear 32. The first input gear and the second input gear are meshed with each other to form a first gear pair, and the first output gear and the second output gear are meshed with each other to form a second gear pair.

[0033] The switchable dual clutch is installed on the input shaft or output shaft between the first input gear and the first output gear, and performs mutually exclusive clutching operation on the first gear pair and the second gear pair. The mutually exclusive clutching means that when the first gear pair is in the engaged state, the second gear pair is in the disengaged state; conversely, when the second gear pair is in the engaged state, the first gear pair is in the disengaged state. Therefore, the switchable dual clutch can perform two different routes of power transmission on the first gear pair and the second gear pair.

[0034] Specifically, taking the switching dual clutch set on the input shaft as an example, the first route is: the power of the input shaft can be directly transmitted to the output shaft through the second gear pair; the corresponding second route is: the input shaft transmits power to the intermediate shaft through the first gear pair, and then transmits it to the output shaft through the second gear pair, achieving the effect of changing between two gears.

[0035] In this embodiment, the switchable dual clutch includes a first clutch block 41, a second clutch block 42 and a piston unit 43. The piston unit includes a double-headed piston body 431 and a cavity 432. The cross-section of the double-headed piston body is an I-shape. The structure of the double-headed piston body is composed of three ring bodies. Therefore, the double-headed piston body is installed in the cavity. The movement of the double-headed piston body in the cavity is controlled by inputting hydraulic oil, thereby achieving a clutch operation in which one end of the switchable dual clutch is in a closed state and the other end is in a disengaged state.

[0036] In this embodiment, the oil circuit structure includes a housing oil circuit 61, an axle oil circuit 62 and a clutch oil circuit 63. The housing oil circuit is a double-hole oil circuit, which has two independent oil circuits. The clutch oil circuit includes a first oil guide channel 631 and a second oil guide channel 632. The axle oil circuit includes a first oil guide channel 621 and a second oil guide channel 622. The axle oil circuit can be set on the input shaft or the output shaft to form an input shaft oil circuit or an output shaft oil circuit. Specifically, hydraulic oil is injected into one side of the cavity through the first oil guide channel, and hydraulic oil is also injected into the other side of the cavity through the second oil guide channel, so that the pressure at both ends of the double-headed piston body in the cavity is the same, so that the double-headed piston body is balanced in the cavity to reach the initial preparation state.

[0037] In this embodiment, a switchable dual clutch is installed on the input shaft, so only two oil passages are needed to transport hydraulic oil respectively. Therefore, the number of oil passages to be opened can be calculated as twice the number of switchable dual clutches, so that the switchable dual clutches can be independently and mutually exclusively controlled. When the switchable dual clutch is engaged or disengaged, the hydraulic oil is input into the cavity of the switchable dual clutch through the housing oil passage, the shaft oil passage and the clutch oil passage, thus completing the delivery of the hydraulic oil.

[0038] Specifically, take the shaft oil circuit set on the input shaft as an example. The double-hole delivery oil circuit has two oil passages, so the hydraulic oil is delivered to the input shaft through the double-hole delivery oil circuit, while the shaft oil circuit is delivered through the first delivery oil circuit and the second delivery oil circuit respectively, and is respectively connected to the two oil passages of the double-hole delivery oil circuit, and the clutch oil circuit is connected to the first delivery oil circuit through the first oil guide passage, and the second oil guide passage is connected to the second delivery oil circuit, and the hydraulic oil is delivered to both sides of the cavity respectively, so as to complete the purpose of delivering the hydraulic oil from the housing to the switchable dual clutch.

[0039] At the connection between the double-hole oil delivery circuit and the shaft oil circuit, two annular oil inlet grooves are opened on the input shaft at this location, and then the two sides of the oil inlet grooves are sealed by sealing rings, that is, the sealing ring is located between the housing and the input shaft for sealing, and each double-hole oil delivery circuit has an oil inlet groove for conduction connection. Between the input shaft and the inner hole of the switchable dual clutch, they are connected by interference fit, and an annular oil outlet groove is also used to connect the shaft oil circuit with the first oil guide channel and the second oil guide channel respectively, and then the hydraulic oil is respectively transported to the two sides of the cavity, so as to achieve the purpose of controlling the double-headed piston body to move in the cavity through the oil pressure of the hydraulic oil.

[0040] In this embodiment, the first clutch block is connected to the first input gear of the input shaft, and the second clutch block is connected to the first output gear, so the first switching dual clutch can perform mutually exclusive clutch control on the first gear pair of the input shaft and the second gear pair of the output shaft. In this embodiment, taking the first oil guide passage pushing the double-headed piston body toward the first output gear direction after oil intake as an example, the second oil guide passage pushes the double-headed piston body toward the first input gear direction after oil intake.

[0041] The oil circuits in the transmission can use a hydraulic oil pump to transport the hydraulic oil in the oil tank to different pipelines. For example, when the first gear pair needs to be in a closed state, the hydraulic oil is transported through an oil channel of the first double-hole oil delivery circuit, the first oil delivery circuit of the shaft oil circuit, and the second oil guide channel, so that the double-headed piston body of the first switching dual clutch moves toward the first gear pair. The double-headed piston body pushes the first friction plate group to engage friction, and the power is transmitted from the input shaft to the first input gear through the first clutch block, so that the first gear pair is in a closed state, that is, the first input gear is meshed with the second input gear, and the power is transmitted from the input shaft to the intermediate shaft. At this time, the switching dual clutch and the second gear pair are in a disengaged state.

[0042] Similarly, when the second gear pair is in the engaged state, the hydraulic oil is transported through the other oil passage of the double-hole oil delivery passage, the second oil delivery passage of the shaft oil passage, and the route of the first oil guide passage, so that the double-headed piston body of the first switching dual clutch moves toward the second gear pair. The double-headed piston body pushes the second friction plate group to perform combined friction, and transmits power from the input shaft to the first output gear through the second clutch block, so that the second gear pair is in the engaged state, that is, the first output gear is meshed with the second output gear, and the power is directly transmitted from the input shaft to the output shaft. At this time, the switching dual clutch and the first gear pair are in the disengaged state.

[0043] In this embodiment, the shaft oil circuit is set on the input shaft as an example, and a sealing ring 623 is set on the input shaft on both sides of each oil inlet of the shaft oil circuit. That is, a sealing ring is set on both sides of the oil inlet of the first oil delivery circuit and the oil inlet of the second oil delivery circuit. If the first oil delivery circuit and the second oil delivery circuit are arranged side by side on the input shaft, the sealing ring, the oil inlet of the first oil delivery circuit, the sealing ring, the oil inlet of the second oil delivery circuit and the sealing ring can be arranged on the input shaft in sequence. A sealed connection between the housing oil circuit and the input oil circuit is achieved to avoid leakage of hydraulic oil. On the input shaft section at the oil outlet of the first oil delivery circuit and the oil outlet of the second oil delivery circuit, an interference fit can be used to cooperate with the inner hole of the clutch, so that there will be no oil leakage between the shaft oil circuit and the first clutch oil circuit, and the oil cross-talk between the various oil delivery pipelines can also be avoided. The sealing ring in this embodiment can be an open sealing ring, and has a high wear-resistant characteristic, which can ensure the service life on the input shaft or output shaft and reduce the cost of transmission maintenance or repair.

[0044] In this embodiment, the transmission oil circuit structure is operated in a state full of hydraulic oil. Therefore, once the hydraulic oil is injected into the cavity again, the oil pressure in the cavity will be unbalanced, thereby driving the double-headed piston body to move in the cavity, and the double-headed piston body drives the first or second friction plate group to frictionally engage, thereby achieving the clutch effect. The preparation time for driving the double-headed piston body to move is zero, achieving the effect of zero-time waiting for clutch switching, and shortening the waiting time of the clutch structure during clutch switching.

[0045] In this embodiment, the first friction plate group 411 and the second friction plate group 421 have the same structure, and can be composed of a friction plate and a steel plate or a friction plate and a friction plate. In this embodiment, the friction plate and the steel plate are used as an example. The friction plate is installed on the clutch block, and the steel plate is installed on the outer side of the cavity; conversely, the friction plate can also be installed on the outer side of the cavity, and the steel plate is installed on the clutch block, thereby forming a mutual contact and friction effect between the friction plate and the steel plate, thereby performing a clutch operation on the gear connected to the other end of the clutch block.

[0046] In this embodiment, the number of intermediate shafts is multiple, which may be two, three or four, etc. Multiple intermediate shafts are arranged in a circumferential array on the central axis of the input shaft or the output shaft, such as two intermediate shafts can be arranged at the upper and lower positions of the input shaft and the output shaft respectively, and the multiple intermediate shafts have the same structure, and are provided with gears with the same number of teeth and the same tooth width. In this way, the load of the input shaft and the output shaft can be distributed through multiple intermediate shafts, and the bending strength of the input shaft, the intermediate shaft and the output shaft is enhanced, thereby improving the bearing capacity of the input shaft and the output shaft, and achieving the purpose of increasing the load.

[0047] It should be noted that, although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present invention specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A transmission with a hydraulic oil circuit structure, characterized in that: It includes an input shaft, an output shaft, an intermediate shaft, a switching dual clutch, a housing and an oil circuit structure; The center line of the input shaft is colinear with the center line of the output shaft, and the input end of the input shaft and the output end of the output shaft respectively penetrate the two opposite side walls of the housing and are arranged on the housing, the input shaft is drivingly connected with the input end of the intermediate shaft, the output end of the intermediate shaft is drivingly connected with the output shaft, and the center line of the intermediate shaft is parallel to the center line of the input shaft and is arranged in the housing; The switchable dual clutch is arranged on the input shaft or the output shaft, the switchable dual clutch is located between two adjacent gear pairs on the input shaft and / or the output shaft, and the switchable dual clutch is used to control the gear pairs on both sides of the switchable dual clutch to perform mutually exclusive clutch operation; The oil circuit structure comprises a housing oil circuit, a shaft oil circuit and a clutch oil circuit, wherein the housing oil circuit is arranged in the housing, the shaft oil circuit is arranged in the input shaft or the output shaft, a branch of the housing oil circuit is connected to a first oil delivery circuit of the shaft oil circuit, and another branch of the housing oil circuit is connected to a second oil delivery circuit of the shaft oil circuit; the clutch oil circuit is arranged in a switchable dual clutch cavity, the first oil delivery circuit of the shaft oil circuit is connected to a first oil guide channel of the clutch oil circuit; the second oil delivery circuit of the shaft oil circuit is connected to a second oil guide channel of the clutch oil circuit; The housing oil circuit is a double-hole oil delivery circuit, the oil inlet of the double-hole oil delivery circuit is arranged on the outer side of the housing, and the oil outlet of the double-hole oil delivery circuit is arranged on the inner side of the shaft hole of the housing input shaft; The clutch oil circuit includes a first oil guide passage and a second oil guide passage; The first oil guide passage is arranged between one side of the clutch piston inner cavity and the inner side surface of the clutch inner hole, and the second oil guide passage is arranged between the other side of the clutch piston inner cavity and the inner side surface of the clutch inner hole; The switchable dual clutch comprises a first clutch block, a second clutch block and a piston unit; The piston unit comprises a double-headed piston body and a cavity, wherein the cross section of the double-headed piston body is an I-shaped, one end of the double-headed piston body is arranged in the cavity, and the other end of the double-headed piston body is located outside the cavity, the oil outlet of the first oil guide passage is arranged on one side of the cavity, and the oil outlet of the second oil guide passage is arranged on the other side of the cavity; The first clutch block includes a first friction plate group, and the second clutch block includes a second friction plate group. The first friction plate group is located on one side of the other end of the double-headed piston body, and the second friction plate group is located on the other side of the other end of the double-headed piston body. The first clutch block and the second clutch block are used to be respectively arranged on the gear pairs on both sides, and the double-headed piston body is used to drive one of the first friction plate group or the second friction plate group to engage and the other to disengage; Sealing rings are arranged on the input shafts on both sides of each oil inlet of the shaft oil circuit.

2. The transmission with a hydraulic oil circuit structure according to claim 1, characterized in that: The sealing ring is an open sealing ring.

3. The transmission with a hydraulic oil circuit structure according to claim 1, characterized in that: A plurality of intermediate shafts are provided, and the plurality of intermediate shafts are arranged in a circular array around the central axis of the input shaft in the housing.

4. The transmission with a hydraulic oil circuit structure according to claim 1, characterized in that: The input shaft is provided with a first input gear, the output shaft is provided with a first output gear, and the switchable dual clutch is provided on the input shaft or the output shaft between the first input gear and the first output gear.

5. The transmission with a hydraulic oil circuit structure according to claim 4, characterized in that: The intermediate shaft is provided with a second input gear and a second output gear, the first input gear and the second input gear are meshed with each other, and the first output gear and the second output gear are meshed with each other.

Images