Brake and oil pump integrated device of single-intermediate-shaft mechanical automatic transmission

Abstract

The utility model discloses a brake and oil pump integrated device of a single intermediate shaft mechanical automatic transmission, which belongs to the field of gearboxes and comprises a brake upper cover, the brake upper cover is arranged on a brake shell, and an oil pump shell is arranged on the lower portion of the brake shell. Through holes are formed in the brake shell and the oil pump shell, and an oil pump shaft is arranged in the through holes; in the oil pump shell, the oil pump shaft is meshed with the rotor unit; a brake unit is arranged in a cavity formed by the brake upper cover and the brake shell, and the brake unit is connected with the oil pump shaft. The oil pump and the brake are integrated and installed at the front end of the transmission intermediate shaft, the function of the oil pump can be achieved, the function of the brake can also be achieved, the integrated design enables the structure to be compact, assembling is easy, and maintenance is more convenient when faults occur.

Description

Technical Field

[0001] The utility model belongs to the technical field of gearboxes, and in particular relates to a brake and oil pump integrated device of a single intermediate shaft mechanical automatic gearbox. Background Art

[0002] Automatic Mechanical Transmission (AMT) is a traditional mechanical manual transmission that uses an electronic control unit to realize the separation and engagement of the clutch and the selection and shifting of gears. When shifting gears, the two shafts in the main box are required to be synchronized with the target gear. According to the power transmission route of the AMT transmission, the synchronization operation of the target gear can be achieved by controlling the speed of the intermediate shaft or the input shaft. During the downshift process, the clutch is engaged and the engine speed is increased by controlling the engine speed, so that the target gear speed can be increased to meet the synchronization requirements; during the upshift process, the brake needs to be controlled to brake the intermediate shaft to control its speed reduction, so that the target gear meshing with the intermediate shaft can quickly reach the target speed in a short time, so as to achieve rapid speed synchronization and complete the rapid shifting operation.

[0003] For a single intermediate shaft mechanical automatic transmission, since there is only one intermediate shaft, it is difficult to arrange the oil pump and brake. Currently, manufacturers usually adopt a layout method in which the oil pump and brake are separated and the oil pump is arranged in the transmission housing. This method is complicated to assemble and difficult to repair when a fault occurs. Utility Model Content

[0004] In order to solve the problem that, due to space limitation, an oil pump unit and a brake unit are usually separately arranged at the front end of a transmission and inside a transmission housing in a single intermediate shaft mechanical automatic transmission, which makes the transmission assembly complicated and maintenance troublesome, the utility model provides a brake and oil pump integrated device of a single intermediate shaft mechanical automatic transmission, which integrates the oil pump and the brake into one and is arranged at the front end of the transmission. The entire integrated device has a compact structure, is simple to assemble, and is more convenient to repair in the event of a failure.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] A brake and oil pump integrated device for a single intermediate shaft mechanical automatic transmission comprises a brake upper cover, the brake upper cover is arranged on a brake housing, an oil pump housing is arranged at the lower part of the brake housing; through holes are arranged on the brake housing and the oil pump housing, and an oil pump shaft is arranged in the through hole;

[0007] The oil pump shaft is meshed with the oil pump rotor unit in the oil pump housing; a brake unit is arranged in the cavity formed by the brake upper cover and the brake housing, and the brake unit is connected with the oil pump shaft.

[0008] The oil pump rotor unit includes an inner rotor and an outer rotor, and the inner rotor is meshed with the oil pump shaft through a spline.

[0009] The brake unit includes a pair of plates and a friction plate. Several pair of plates and friction plates are alternately arranged on the oil pump shaft. A hole is provided at one end of the oil pump shaft in the through hole. A spring is arranged in the hole, and a push pin is sleeved on the outside of the spring. A piston is arranged between the brake cover and the pair of plates, and the piston can push the push pin.

[0010] 3-4 notches are evenly arranged on the outer circumference of the dual pieces.

[0011] The brake upper cover is provided with first pin holes having the same number as the notches, and the brake housing is provided with second pin holes having the same number as the notches.

[0012] The oil pump shaft and the friction plate are meshed through splines.

[0013] The top of the ejector pin is in a truncated cone shape, and a tenth air hole is arranged on the side of the top of the ejector pin, and the tenth air hole is communicated with the second chamber.

[0014] A first air hole is arranged on the outer side of the brake upper cover, a second air hole is arranged on the outer side of the brake housing, and a sixth air hole is arranged on the outer side of the oil pump housing. The first air hole, the second air hole and the sixth air hole cooperate to form an air path to the brake unit.

[0015] The third air hole, the fourth air hole and the fifth air hole are arranged on the brake housing; the seventh air hole, the eighth air hole and the ninth air hole are arranged on the oil pump housing, the third air hole is connected with the seventh air hole, the fourth air hole is connected with the eighth air hole, the fifth air hole is connected with the ninth air hole, and the third air hole, the fourth air hole, the fifth air hole, the seventh air hole, the eighth air hole and the ninth air hole can all be connected with the first cavity.

[0016] The end of the oil pump shaft that is not at the through hole is in a special-shaped cylindrical shape and cooperates with the hole at the front end of the intermediate shaft for transmission.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model integrates the oil pump and the brake into one body and installs them at the front end of the clutch housing, cooperates with the transmission intermediate shaft for transmission, arranges the brake unit in the cavity formed by the brake upper cover and the brake housing, arranges the rotor unit in the cavity formed by the brake housing and the oil pump housing, and connects the brake, the oil pump and the intermediate shaft through the oil pump shaft, which can realize the function of the brake and the function of the oil pump, and there is no need to consider how to arrange the oil pump in the housing. The one-piece design makes the oil pump and brake integrated device compact in structure, simple to assemble, and more convenient to repair in case of failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following is a brief introduction to the drawings required for use in the embodiment:

[0020] Figure 1 It is a cross-sectional view of the oil pump and brake integrated device of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the oil pump and brake integrated device of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the brake upper cover of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the brake housing of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the oil pump housing of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the outer rotor of the oil pump of the utility model;

[0026] Figure 7 It is a structural schematic diagram of the inner rotor of the oil pump of the utility model;

[0027] Figure 8 It is a structural schematic diagram of the brake piston of the utility model;

[0028] Fig. 9 It is a structural schematic diagram of the oil pump shaft of the utility model;

[0029] Fig.10 It is a structural schematic diagram of the brake friction plate of the utility model;

[0030] Fig.11 It is a structural schematic diagram of the brake pair plates of the utility model;

[0031] Fig.12 It is a structural schematic diagram of the brake ejector pin of the utility model;

[0032] Fig.13 It is a structural schematic diagram of the brake spring of the utility model;

[0033] Fig.14 It is a structural schematic diagram of the brake fixing pin of the utility model;

[0034] Fig.15 It is a cross-sectional view of the installation of the brake fixing pin of the utility model;

[0035] In the figure: 1, first air hole; 2, brake cover; 3, brake housing; 4, oil pump housing; 5, outer rotor; 6, inner rotor; 7, piston; 8, oil pump shaft; 9, friction plate; 10, dual plate; 11, top pin; 12, spring; 13, fixing pin; 21, first pin hole; 31, second pin hole; 32 second air hole; 33, third air hole; 34, fourth air hole; 35, fifth air hole; 41, pin hole; 42, sixth air hole; 43, seventh air hole; 44, eighth air hole; 45, ninth air hole; 61, involute spline; 82, external spline; 83, hole; 91, spline; 101, notch; 111, tenth air hole; 14, first cavity; 15, second cavity. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] The utility model is further described in detail below with reference to the accompanying drawings:

[0043] like Figure 1-11 As shown, a brake and oil pump integrated device of a single intermediate shaft mechanical automatic transmission comprises a brake upper cover 2, the brake upper cover 2 is arranged on a brake housing 3, an oil pump housing 4 is arranged at the lower part of the brake housing 3; through holes are arranged on the brake housing 3 and the oil pump housing 4, and an oil pump shaft 8 is arranged in the through hole;

[0044] In the oil pump housing 4 , the oil pump shaft 8 is meshed with the oil pump rotor unit; the oil pump rotor unit includes an inner rotor 6 and an outer rotor 5 , and the inner rotor 6 is meshed with the oil pump shaft 8 via splines.

[0045] A brake unit is arranged in a cavity formed by the brake upper cover 2 and the brake housing 3, and the brake unit includes a pair of plates 10 and a friction plate 9. Several pair of plates 10 and friction plates 9 are alternately arranged on the oil pump shaft 8, and the uppermost layer is the pair of plates 10. The oil pump shaft 8 is provided with a hole 83 at one end in the through hole, and a spring 12 is arranged in the hole 83, and a push pin 11 is sleeved on the outside of the spring 12; a piston 7 is arranged between the brake upper cover 2 and the pair of plates 10, and the piston 7 can push the push pin 11. When the brake is working, the piston 7 is pushed to press the friction plate 9 under the action of air pressure to achieve braking. When the solenoid valve controlling the air circuit is closed, the piston 7 returns to the initial position under the action of the spring 12 and the push pin 11, and the braking is cancelled.

[0046] like Figure 2-5 As shown, circular holes are arranged at the same position on the outer sides of the brake upper cover 2, the brake housing 3 and the oil pump housing 4, and the three are connected by bolts and fixed to the front end of the clutch housing.

[0047] like Figure 7 As shown, the involute spline 61 of the inner rotor 6 is meshed with the external spline 82 of the oil pump shaft 8 .

[0048] like Fig. 9 As shown, the end of the oil pump shaft 8 that is not at the through hole is in a special cylindrical shape, and cooperates with the hole at the front end of the intermediate shaft for transmission.

[0049] like Fig.12 As shown, the top of the ejector pin 11 is in a truncated cone shape, and a tenth air hole 111 is arranged on the side of the truncated cone of the ejector pin 11, and the tenth air hole 111 is connected with the second chamber 15. It is ensured that the piston 7 presses the ejector pin 11 tightly during braking, and when the spring 12 is compressed, the air in the cavity formed by the ejector pin 11 and the spring 12 is discharged from the tenth air hole 111.

[0050] like Fig.10 As shown, the friction plate 9 is provided with splines 91 which mesh with the external splines 82 of the oil pump shaft 8 .

[0051] like Figure 3 , 4 As shown in FIGS. 11, 14 and 15, 3-4 notches 101 are evenly arranged on the outer periphery of the dual plate 10, the brake upper cover 2 is provided with the same number of first pin holes 21 as the notches 101, and the brake housing 3 is also provided with the same number of second pin holes 31, and the notches 101, the first pin holes 21 and the second pin holes 31 are used to provide a position for fixing the dual plate 10 for the fixing pin 13.

[0052] like Figure 1-5 As shown, a first air hole 1 is arranged on the outer side surface of the brake upper cover 2, a second air hole 32 is arranged on the outer side surface of the brake housing 3, and a sixth air hole 42 is arranged on the outer side surface of the oil pump housing 4. The first air hole 1, the second air hole 32 and the sixth air hole 42 cooperate to form an air path to the piston 7.

[0053] like Figure 1 , 4 As shown in Figures 5 and 6, a third air hole 33, a fourth air hole 34 and a fifth air hole 35 are arranged on the brake housing 3; a seventh air hole 43, an eighth air hole 44 and a ninth air hole 45 are arranged on the oil pump housing 4, the third air hole 33 is connected with the seventh air hole 43, the fourth air hole 34 is connected with the eighth air hole 44, the fifth air hole 35 and the ninth air hole 45 are connected, and the third air hole 33, the fourth air hole, the fifth air hole 35, the seventh air hole 43, the eighth air hole 44 and the ninth air hole 45 can all be connected with the first cavity 14.

[0054] The working method of the integrated device of brake and oil pump of a single intermediate shaft mechanical automatic transmission is as follows: the first air hole 1 of the brake upper cover 2 cooperates with the second air hole 32 on the brake housing 3 and the sixth air hole 42 on the oil pump housing 4, and the high pressure gas of the brake passes through the sixth air hole 42, the second air hole 32 and the first air hole 1 to the front end of the piston 7, pushing the piston 7 to move, squeezing the friction plate 9 and the dual plate 10, and realizing the braking of the intermediate shaft of the transmission. The top pin 11 and the spring 12 are sheathed together and installed together in the groove 83 of the oil pump shaft 8. The top pin 11 is processed with a tenth air hole 111. When the brake is applied, the piston pushes the top pin 11 to compress the spring 12, and the air in the second cavity 15 can be discharged through the tenth air hole 111. When the brake stops braking, the piston 7 returns to the initial position under the action of the spring 12. When the brake is working, the piston 7 moves backward, and the gas in the first cavity 14 can be discharged through the third air hole 33, the fourth air hole 34 and the fifth air hole 35 on the brake housing 3, and the seventh air hole 43, the eighth air hole 44 and the ninth air hole 45 on the oil pump housing 4.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field can still modify or replace the specific implementation methods of the present invention. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the claims of the present invention to be approved.

Claims

1. A brake and oil pump integrated device for a single intermediate shaft mechanical automatic transmission, characterized in that: The brake cover (2) comprises a brake upper cover (2), which is arranged on a brake housing (3), and an oil pump housing (4) is arranged at the lower part of the brake housing (3); through holes are arranged on the brake housing (3) and the oil pump housing (4), and an oil pump shaft (8) is arranged in the through hole; The oil pump shaft (8) is meshed with the oil pump rotor unit in the oil pump housing (4); a brake unit is arranged in a cavity formed by the brake upper cover (2) and the brake housing (3), and the brake unit is connected to the oil pump shaft (8).

2. The brake and oil pump integrated device of a single intermediate shaft mechanical automatic transmission according to claim 1, characterized in that: The oil pump rotor unit comprises an inner rotor (6) and an outer rotor (5), and the inner rotor (6) is meshed with the oil pump shaft (8) via a spline.

3. The brake and oil pump integrated device of a single intermediate shaft mechanical automatic transmission according to claim 1, characterized in that: The brake unit comprises a pair of plates (10) and a friction plate (9), wherein a plurality of pair of plates (10) and friction plates (9) are alternately arranged on an oil pump shaft (8), wherein a hole (83) is provided at one end of the oil pump shaft (8) in the through hole, a spring (12) is arranged in the hole (83), and a push pin (11) is sleeved outside the spring (12); a piston (7) is arranged between a brake upper cover (2) and the pair of plates (10), and the piston (7) is capable of pushing the push pin (11).

4. The brake and oil pump integrated device of a single intermediate shaft mechanical automatic transmission according to claim 3, characterized in that: Three to four notches (101) are evenly arranged on the outer circumference of the dual piece (10).

5. The brake and oil pump integrated device of a single intermediate shaft mechanical automatic transmission according to claim 4, characterized in that: The brake upper cover (2) is provided with the same number of first pin holes (21) as the notches (101), and the brake housing (3) is provided with the same number of second pin holes (31) as the notches (101).

6. The brake and oil pump integrated device of a single intermediate shaft mechanical automatic transmission according to claim 3, characterized in that: The oil pump shaft (8) and the friction plate (9) are meshed with each other via splines.

7. The brake and oil pump integrated device of a single intermediate shaft mechanical automatic transmission according to claim 3, characterized in that: The top of the ejector pin (11) is in a truncated cone shape, and a tenth air hole (111) is provided on the side surface of the top of the ejector pin (11), and the tenth air hole (111) is in communication with the second chamber (15).

8. The brake and oil pump integrated device of a single intermediate shaft mechanical automatic transmission according to claim 1, characterized in that: A first air hole (1) is arranged on the outer side surface of the brake upper cover (2), a second air hole (32) is arranged on the outer side surface of the brake housing (3), and a sixth air hole (42) is arranged on the outer side surface of the oil pump housing (4); the first air hole (1), the second air hole (32) and the sixth air hole (42) cooperate to form an air path to the brake unit.

9. The brake and oil pump integrated device of a single intermediate shaft mechanical automatic transmission according to claim 1, characterized in that: A third air hole (33), a fourth air hole (34) and a fifth air hole (35) are arranged on the brake housing (3); a seventh air hole (43), an eighth air hole (44) and a ninth air hole (45) are arranged on the oil pump housing (4); the third air hole (33) is connected to the seventh air hole (43); the fourth air hole (34) is connected to the eighth air hole (44); the fifth air hole (35) is connected to the ninth air hole (45); and the third air hole (33), the fourth air hole (34), the fifth air hole (35), the seventh air hole (43), the eighth air hole (44) and the ninth air hole (45) are all able to communicate with the first cavity (14).

10. The brake and oil pump integrated device of a single intermediate shaft mechanical automatic transmission according to claim 1, characterized in that: The end of the oil pump shaft (8) not at the through hole is in a special cylindrical shape and cooperates with the hole at the front end of the intermediate shaft for transmission.

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