Oil way bottom plate structure of gear shifting device

Abstract

The invention discloses an oil way bottom plate structure of a gear shifting device. The oil way bottom plate is cylindrical, a flow channel is arranged in the oil way bottom plate, an oil inlet is formed in the top, steel balls are embedded in oil holes in the side face, and an oil outlet leading to a clutch is formed in the bottom. An oil channel is formed in the oil way bottom plate and communicated with the top oil inlet and the bottom oil outlet leading to the clutches, a certain angle exists between the two oil inlets needed by the gears, and when the valve element rotates to the two oil inlets needed by the gears, oil enters the corresponding clutches in sequence, so that the clutches are connected and disconnected in sequence, and therefore the gear shifting speed is increased. Therefore, the time sequence requirement of oil inlet of each clutch during gear shifting is met, gear shifting impact during combination of clutch friction plates is reduced, deformation of the clutch friction plates is reduced, the service life of the clutch friction plates is prolonged, and the reliability of the clutch friction plates is improved.

Description

Technical Field

[0001] This patent belongs to the field of gear shifting devices, and specifically relates to an oil circuit base plate structure of a gear shifting device. Background Art

[0002] In the mechanical structure of existing high-power automatic transmissions, achieving a single gear shift usually requires the coordinated work of two clutches. The shift device that controls the clutch operation drives the valve core to reciprocate by controlling the on-off of low-pressure oil by the solenoid valve, and controls the high-pressure oil entering the clutch through the reciprocating motion of the valve core. In order to ensure smooth shifting and reduce the impact of shifting, the light-load end clutch is generally combined first, and then the heavy-load end clutch is combined. Therefore, the shift device requires a large number of pressure reduction, voltage stabilization, pressure increase, delay, and error prevention structures to meet the requirements of smooth shifting and clutch engagement timing. In response to the above requirements, the shift device designed with a reciprocating valve core has a complex oil circuit inside the valve body and oil circuit bottom plate, a variety of structures, difficult processing, poor tolerance to oil contamination, and is not suitable for some special harsh working conditions.

[0003] In order to solve the above problems, patent CN 118008914 A proposes a valve core rotary flow distribution valve device, which converts the reciprocating motion of the valve core of the ordinary reversing valve into the rotary motion of the valve core, reducing the hydraulic impact during reversing. However, the valve core has a large number of oil channels, the oil channel processing is complex, the valve core rigidity is poor, it is difficult to ensure accuracy, it is easy to deform and get stuck during operation, and it is easy to aggravate the wear of the valve core and the valve hole. The valve body is too simple and cannot meet the timing requirements of the shift clutch engagement. Summary of the invention

[0004] In order to solve the problems existing in the background technology, the purpose of the present invention is to provide an oil circuit base plate structure of a gear shifting device, in which the oil channel of the valve core is arranged on the oil circuit base plate. On the basis of ensuring the gear shifting performance, the stiffness of the valve core can be improved, and the order in which the oil enters the clutch can be controlled by the angle between the oil channel holes on the top of the oil circuit base plate, so as to reduce the impact of the clutch friction plate during gear shifting and increase the life of the clutch friction plate.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A shifting device oil circuit base plate structure comprises a screw mounting hole at the top of the oil circuit base plate, C1, C2, C3, C4, C5 series oil inlets, a main oil inlet, a valve core mounting groove, a valve core stop groove, a C1 series oil passage inside the oil circuit base plate, a C2 series oil passage, C3, C4, C5 oil passages, C1, C2, C3, C4, C5 oil outlets at the bottom of the oil circuit base plate, and a steel ball; the screw mounting hole is arranged at the edge of the oil circuit base plate, the oil passage is arranged between the top and the bottom of the oil circuit base plate, the oil inlet is arranged between the screw mounting hole at the top of the oil circuit base plate and the valve core mounting groove, the oil passages are connected, and the oil passages are blocked with steel balls at the edge of the oil circuit base plate; the diameter of the valve core mounting groove and the main oil inlet are located in the middle of the oil circuit base plate, the diameter of the valve core mounting groove is larger than the main oil inlet, and the valve core mounting groove is located above the main oil inlet.

[0007] As a further limitation of the present invention, the C1 series oil inlet is composed of C1A, C1B, and C1C oil inlets, the C2 series oil inlet is composed of C2A, C2B, and C2C oil inlets, the C3 series oil inlet is composed of C3A and C3B oil inlets, the C4 series oil inlet is composed of C4A and C4B oil inlets, and the C5 series oil inlet is composed of C5A and C5B oil inlets. The oil inlet sequence is arranged in a clockwise direction of C5A, C5B, C1A, C1B, C2A, C2B, C1C, C2C, C3A, C3B, C4A, and C4B to meet the gear logic requirements of the shift device.

[0008] As a further limitation of the present invention, the C1 series oil passage of the oil circuit bottom plate is composed of the C1A oil passage and the C1B oil passage, and the C2 series oil passage is composed of the C2A oil passage and the C2B oil passage. The C1 series oil passage connects the C1 series oil inlet at the top of the oil circuit bottom plate with the C1 oil outlet at the bottom of the oil circuit bottom plate, the C2 series oil passage connects the C2 series oil inlet at the top of the oil circuit bottom plate with the C2 oil outlet at the bottom of the oil circuit bottom plate, and the C3, C4, and C5 oil passages respectively connect the C3, C4, and C5 series oil inlets at the top of the oil circuit bottom plate with the C3, C4, and C5 oil outlets at the bottom of the oil circuit bottom plate.

[0009] As a further limitation of the present invention, the shape of the oil inlet includes but is not limited to waist-shaped grooves, round holes and the like for ease of arrangement and processing.

[0010] As a further limitation of the present invention, there are two valve core stop grooves, the first one is located between the C2B oil inlet and the C1C oil inlet, close to the valve core mounting groove, and the second one is located between the C4B oil inlet and the C5A oil inlet, close to the valve core mounting groove. This prevents the valve core from rotating too much, causing logical errors in the shifting device, and damaging the gearbox.

[0011] As a further limitation of the present invention, the arc between the C5B and C1A oil inlets, the C2B and C1C oil inlets, the C2C and C3A oil inlets, and the C4B and C5A oil inlets is twice that between the other oil inlets, and the size of the arc is determined by the number and size of the oil inlets. The more the number of oil inlets, the smaller the arc. There is a β angle between the oil inlets C1A and C3A, C1B and C3B, C2A and C4A, C2B and C4B, C1C and C5A, and C2C and C5B, and the angle is 170 to 178 degrees. The angle can be adjusted according to the pressure required for the clutch to engage. The greater the clutch engagement pressure, the greater the angle, and the smaller the impact during gear shifting. The smaller the clutch engagement pressure, the smaller the angle, and the smaller the impact during gear shifting.

[0012] The present invention has the following beneficial effects:

[0013] 1. The oil circuit bottom plate structure provided by the present invention can control the order in which oil enters the clutch, meet the timing requirements of clutch engagement when a high-power automatic transmission shifts gears, and has a simple and reliable structure.

[0014] 2. The oil circuit base plate structure provided by the present invention transfers the oil circuit inside the valve core to the non-moving oil circuit base plate through the internal oil circuit channel, thereby reducing the processing difficulty and improving the reliability and stability of the shift valve.

[0015] 3. The oil circuit bottom plate structure provided by the present invention can prevent the valve core from rotating at an excessive angle and causing gear jumping, thereby effectively protecting the operating safety of a high-power automatic transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the top structure of the oil circuit base plate of the present invention.

[0017] Figure 2 It is a schematic diagram of the structure of the internal oil passage of the oil circuit base plate of the present invention.

[0018] Figure 3 It is a schematic diagram of the bottom structure of the oil circuit bottom plate of the present invention.

[0019] Figure 4 It is a schematic diagram for explaining the working of the oil circuit base plate structure of the present invention.

[0020] In the figure: C1A oil inlet 100, C1B oil inlet 101, C2A oil inlet 102, C2B

[0021] Oil inlet 103, C1C oil inlet 104, C2C oil inlet 105, C3A oil inlet 106, C3B oil inlet 107, C4A oil inlet 108, C4B oil inlet 109, C5A oil inlet

[0022] 110, C 5B oil inlet 111, main oil inlet 112, valve core installation groove 113, screw installation hole

[0023] 114, β angle 115, valve core stop groove 116, steel ball 200, C 4 oil channel 201, C 5 oil channel

[0024] 202, C 1A oil passage 204, C 1B oil passage 203, C 2A oil passage 205, C 2B oil passage

[0025] 206, C 3 oil channel 207, C 4 oil outlet 300, C 5 oil outlet 301, C 1 oil outlet

[0026] 302, C2 oil outlet 303, C3 oil outlet 304, oil circuit bottom plate 400, valve core 401. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with specific implementation cases. The following implementation cases will help those skilled in the art to further understand the present invention, but will not limit the present invention in any form.

[0028] like Figure 1 As shown, the oil circuit bottom plate (400) is cylindrical, and a screw mounting hole (114), C1, C2, C3, C4, C5 series oil inlet, a main oil inlet (112), a valve core mounting groove (113), and a valve core stop groove (116) are provided at the top edge of the oil circuit bottom plate (400). C1, C2, C3, C4, C5 series oil inlet. Among them, the C1 series oil inlet consists of C1A, C1B, and C1C oil inlets (100, 101, and 104), the C2 series oil inlet consists of C2A, C2B, and C2C oil inlets (102, 103, and 105), the C3 series oil inlet consists of C3A and C3B oil inlets (106 and 107), the C4 series oil inlet consists of C4A and C4B oil inlets (108 and 109), and the C5 series oil inlet consists of C5A and C5B oil inlets (110 and 111). The oil inlet ports are arranged in a clockwise order of C5A, C5B, C1A, C1B, C2A, C2B, C1C, C2C, C3A, C3B, C4A, C4B (110, 111, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109) to meet the logical requirements of gear combination.

[0029] The arc between C 5B (111) and C1A (100) oil inlet, C 2B (103) and C1C (104) oil inlet, C 2C (105) and C 3A (106) oil inlet, C 4B (109) and C 5A (110) oil inlet is twice that between the other oil inlets. The size of the arc is determined by the number and size of the oil inlets. The more the number and size of the oil inlets, the smaller the arc. In the figure, the arc between C 5B (111) and C1A (100) oil inlet, C 2B (103) and C1C (104) oil inlet, C 2C (105) and C 3A (106) oil inlet, C 4B (109) and C5A (110) oil inlet is 45 degrees, and the arc between the other oil inlets is 45 degrees. The β angle (115) between the oil inlets C1A (100) and C3A (106), C1B (101) and C3B (107), C2A (102) and C4A (108), C2B (103) and C4B (109), C1C (104) and C5A (110), and C2C (105) and C5B (111) is 178 degrees.

[0030] When oil is supplied to the oil inlets C1A (100) and C3A (106), the gear shift device works in the first gear; when oil is supplied to the oil inlets C1B (101) and C3B (107), the gear shift device works in the second gear; when oil is supplied to the oil inlets C2A (102) and C4A (108), the gear shift device works in the third gear; when oil is supplied to the oil inlets C2B (103) and C4B (109), the gear shift device works in the fourth gear; when oil is supplied to the oil inlets C1C (104) and C5A (110), the gear shift device works in the first reverse gear; and when oil is supplied to the oil inlets C2C (105) and C5B (111), the gear shift device works in the second reverse gear.

[0031] The shape of the oil inlet includes but is not limited to a waist-shaped groove, a round hole and the like for ease of processing and arrangement.

[0032] There are two valve core stop grooves (116), the first one is located between the C2B oil inlet (103) and the C1C oil inlet (104) and close to the valve core mounting groove (113), to prevent the valve core (401) from excessively rotating clockwise, causing the gearbox to directly jump from the 4th gear to the 1st reverse gear, thereby damaging the gearbox. The second one is located between the C4B oil inlet (109) and the C5A oil inlet (110) and close to the valve core mounting groove (113), to prevent the valve core (401) from excessively rotating counterclockwise, causing the gearbox to directly jump from the 2nd reverse gear to the 4th gear, thereby damaging the gearbox.

[0033] like Figure 2As shown, the C1 series oil passages of the oil circuit bottom plate are composed of C1A (204) and C1B (203) oil passages, and the C2 series oil passages are composed of C2A (205) and C2B (206) oil passages. The C1 series oil passages connect the C1 series oil inlet at the top of the oil circuit bottom plate with the C1 oil outlet (302) at the bottom of the oil circuit bottom plate (400). The oil entering from any of the C1A, C1B, C1C (100, 101, 104) oil inlets at the top of the oil circuit plate can enter the C1 oil outlet (302) at the bottom of the oil circuit bottom plate through the C1 series oil passages. The C2 series oil inlet at the top of the oil circuit bottom plate is connected to the C2 oil outlet (303) at the bottom of the oil circuit bottom plate, and the oil entering from any oil inlet of C2A, C2B, C2C (102, 103, 105) at the top of the oil circuit bottom plate can enter the C2 oil outlet (303) at the bottom of the oil circuit bottom plate through the C2 series oil passage. The C3, C4, C5 oil passages (207, 201, 202) respectively connect the C3, C4, C5 series oil inlets at the top of the oil circuit bottom plate to the C3, C4, C5 oil outlets (304, 300, 301) at the bottom of the oil circuit bottom plate. The oil entering from any oil inlet of C3A or C3B (106 or 107) at the top of the oil plate can enter the C3 oil outlet (304) at the bottom of the oil plate through the C3 oil passage (207). Similarly, the oil entering from the C4 or C5 series oil passages can enter the corresponding oil outlet at the bottom of the oil plate through the corresponding oil passages.

[0034] like Figure 3 As shown, the oil circuit bottom plate includes C1, C2, C3, C4, C5 oil outlets (302, 303, 304, 300, 301). The oil outlets are distributed at the edge of the oil circuit bottom plate (400), and the positions can be adjusted according to the clutch holes leading to the box.

[0035] Specific working modes such as Figure 4As shown, a valve core (401) is installed in the valve core installation groove (113) of the oil circuit bottom plate (400), and high-pressure oil reaches the waist-shaped grooves symmetrical on both sides of the valve core (401) from the main oil inlet (112) of the oil circuit bottom plate (400), and the angle between the two waist-shaped grooves is 180 degrees. When the valve core (401) rotates, the waist-shaped grooves symmetrical on both sides above the valve core are close to the C1A (100) and C3A (106) oil inlets. Since the C1A oil inlet (100) and the C3A oil inlet (106) at the top of the oil circuit bottom plate (400) are in relative positions, and the angle between the C1A (100) and C3A (106) oil inlets is 178 degrees. Therefore, the oil first enters the C1A oil inlet (100), and enters the corresponding clutch from the C1 series oil passages provided in the oil circuit bottom plate (400) through the C1 oil outlet (302) at the bottom of the oil circuit. As the valve core (401) rotates, the C3A oil inlet (106) gradually overlaps with the waist-shaped groove of the valve core (401), and the oil enters from the C3A oil inlet (106), and enters the corresponding clutch through the C3 oil passage (207) and the C3 oil outlet (304). At this time, there is no groove at the position of the valve core (401) corresponding to the other oil inlets, and the oil inside the valve core (401) cannot enter the other oil inlets. Therefore, the clutch corresponding to the C3 oil outlet (304) will be engaged later than the clutch corresponding to the C1 oil outlet (302), thereby reducing the impact during gear shifting and extending the life of the clutch. The same applies to the oil inlet C1B(101) and C3B(107), the oil inlet C2A(102) and C4A(108), the oil inlet C2B(103) and C4B(109), the oil inlet C1C(104) and C5A(110), and the oil inlet C2C(105) and C5B(111).

[0036] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application.

Claims

1. An oil circuit bottom plate structure of a gear shift device, comprising at least one screw mounting hole (114) on the top of the oil circuit bottom plate, C1, C2, C3, C4, C5 series oil inlets, a main oil inlet (112), valve core installation groove (113), valve core stop groove (116), C1 series oil passage inside the oil circuit bottom plate, C2 series oil passage, C3, C4, C5 oil passage (207, 201, 202), C1, C2, C3, C4, C5 oil passage (207, 201, 202) at the bottom of the oil circuit bottom plate 5 oil outlets (302, 303, 304, 300, 301), steel balls (200); a screw mounting hole (114) is arranged at the edge of the oil circuit bottom plate (401), the oil channel is arranged between the top and the bottom of the oil circuit bottom plate (401), the oil inlet is arranged between the screw mounting hole (114) at the top of the oil circuit bottom plate (401) and the valve core mounting groove (113), connecting the oil channels, and the oil channels are blocked with steel balls (200) at the edge of the oil circuit bottom plate (401); the valve core mounting groove (113) and the main oil inlet (112) are located in the middle of the oil circuit bottom plate (401), the valve core mounting groove (113) has a diameter larger than the main oil inlet (112), and is located above the main oil inlet (112).

2. The oil circuit bottom plate structure of a shifting device according to claim 1, wherein the C1 series oil inlet is composed of C1A, C1B, and C1C oil inlets (100, 101, and 104), the C2 series oil inlet is composed of C2A, C2B, and C2C oil inlets (102, 103, and 105), the C3 series oil inlet is composed of C3A and C3B oil inlets (106 and 107), the C4 series oil inlet is composed of C4A and C4B oil inlets (108 and 109), and the C5 series oil inlet is composed of C5A and C5B oil inlets (110 and 111), and the oil inlets are arranged in the order of C5A, C5B, C1A, C1B, C2A, C2B, C1C, C2C, C3A, C3B, and C 4A, C 4B are arranged in a clockwise direction (110, 111, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109).

3. An oil circuit base plate structure for a shifting device according to claim 1, wherein the C1 series oil passage of the oil circuit base plate (400) is composed of a C1A oil passage (204) and a C1B oil passage (203), and the C2 series oil passage is composed of a C2A oil passage (205) and a C2B oil passage (206), the C1 series oil passage connects the C1 series oil inlet at the top of the oil circuit base plate with the C1 oil outlet (302) at the bottom of the oil circuit base plate, the C2 series oil passage connects the C2 series oil inlet at the top of the oil circuit base plate with the C2 oil outlet (303) at the bottom of the oil circuit base plate, and the C3, C4, and C5 oil passages (207, 201, and 202) respectively connect the C3, C4, and C5 series oil inlets at the top of the oil circuit base plate (400) with the C3, C4, and C5 series oil outlets at the bottom of the oil circuit base plate. 5 oil outlets (304, 300, 301) are connected.

4. According to the oil circuit bottom plate structure of a gear shifting device as claimed in claim 1, the shape of the oil inlet includes but is not limited to a waist-shaped groove and a round hole.

5. According to the oil circuit base plate structure of a shifting device as described in claim 1, there are two valve core stop grooves (116), the first one is arranged between the C2B oil inlet (103) and the C1C oil inlet (104) close to the valve core installation groove (113), and the second one is arranged between the C4B oil inlet (109) and the C5A oil inlet (110) close to the valve core installation groove (113).

6. The oil circuit bottom plate structure of a shift device according to claim 2, wherein the arc between the oil inlet C5B (111) and C1A (100), the oil inlet C2B (103) and C1C (104), the oil inlet C2C (105) and C3A (106), and the oil inlet C4B (109) and C5A (110) is twice that between the other oil inlets, and the arc between C1A (100) and C3A (106), C1B (101) and C3B (107), C2A (102) and C4A (108), C2B (103) and C4B (109), C1C (104) and C5A (110), C2C (105) and C5B (111) There is an angle β (115) between the central axis of the oil inlet, and the angle is 170 to 178 degrees.

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