Gear shifting executing mechanism and gearbox

Abstract

The utility model relates to a gear shifting executing mechanism and a gearbox. The gear shifting executing mechanism comprises a shell, a gear shifting mechanism, a gear selecting mechanism and a gear shifting rod. The gear shifting mechanism comprises a gear shifting shaft, an oil cavity A and an oil cavity B, wherein the oil cavity A and the oil cavity B are symmetrically arranged on the shell and contain the two ends of the gear shifting shaft respectively. The gear selecting mechanism comprises a gear selecting shaft, an oil cavity C and an oil cavity D, wherein the oil cavity C and the oil cavity D are symmetrically arranged on the shell and contain the two ends of the gear selecting shaft respectively. The gear shifting shaft is located over the gear selecting shaft, and the gear shifting shaft and the gear selecting shaft are perpendicular to each other. The middle of the gear shifting rod is rotationally arranged in the middle of the gear selecting shaft and translates in the axial direction of the gear selecting shaft along with the gear selecting shaft, the top of the gear shifting rod is movably connected with the middle of the gear shifting shaft, and a gear shifting stirring finger is arranged at the bottom. And four groups of oil ways and electromagnetic valves are arranged on the shell and are respectively connected with the oil cavity A, the oil cavity B, the oil cavity C and the oil cavity D. The gear selecting and shifting mechanism is simple in structure, small in occupied size, easy and convenient to install, efficient in gear selecting and shifting action and low in cost.

Description

Technical Field

[0001] This utility model relates to a shifting actuator and a gearbox, belonging to the field of vehicle gearbox technology. Background Technology

[0002] The shift actuator is the main device in an automatic transmission (AMT) that enables automatic gear shifting. Hydraulic shift actuator systems offer advantages such as large capacity, ease of control, and reliable operation, making them promising for application in the automatic transmission field. Most AMT hydraulic shift actuator systems use multiple hydraulic cylinders to control each shift fork shaft, eliminating the need for a gear selection action. However, the integration and control of multiple hydraulic cylinders makes the structure more complex, and the system requires more hydraulic control components, which to some extent affects the control accuracy of the hydraulic actuator. Furthermore, it increases the size of the transmission and the overall cost.

[0003] Therefore, there is an urgent need for a shifting mechanism and gearbox that is simple in structure, occupies a small size, is easy to install, has high efficiency in gear shifting, and is low in cost. Summary of the Invention

[0004] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a shifting actuator and gearbox that is simple in structure, occupies a small volume, is easy and convenient to install, has efficient shifting action, and is low in cost.

[0005] The purpose of this utility model is achieved as follows:

[0006] A shift actuator and a gearbox include a housing, a shift mechanism and a selector installed inside the housing, and a shift lever installed between the shift mechanism and the selector.

[0007] The shifting mechanism includes a shifting shaft, oil chambers A and B symmetrically arranged on the housing and respectively accommodating the two ends of the shifting shaft; the oil pressure of oil chambers A and B is controlled respectively to control the shifting shaft to translate along its axial direction within the two oil chambers;

[0008] The gear selection mechanism includes a gear selection shaft, oil chambers C and D symmetrically arranged on the housing and respectively accommodating the two ends of the gear selection shaft; the oil pressure of oil chambers C and D is controlled respectively to control the gear selection shaft to translate along its axial direction within the two oil chambers;

[0009] The shift shaft is located directly above the gear selection shaft and the two are perpendicular to each other; the shift lever is rotatably mounted in the middle of the gear selection shaft and moves along the axial direction of the gear selection shaft, its top is movably connected to the middle of the shift shaft, and its bottom is provided with shift fingers;

[0010] The housing is provided with four sets of oil circuits and solenoid valves, which are respectively connected to oil chambers A, B, C and D.

[0011] Preferably, the four oil cavities A, B, C, and D are all cylindrical cavities set on the shell, and a sealing plug is screwed into the outer end of the cavity.

[0012] Preferably, the bottom of the middle part of the shift shaft is provided with a groove for fitting the top of the shift lever, and the top is provided with a shift sensing block; the shift sensing block cooperates with the shift sensor installed on the housing to provide feedback on the shift status.

[0013] Preferably, countersunk holes are provided at both ends of the gear selection shaft, and springs are provided in the countersunk holes to abut against oil chamber C or oil chamber D.

[0014] Preferably, the shift lever is restricted from sliding axially along the shift shaft by two retaining springs that are snapped onto the shift shaft on both sides of the middle portion.

[0015] Preferably, a gear selection sensor block is installed on one side of the middle part of the gear shift lever, and the gear selection sensor block cooperates with the gear selection sensor installed on the housing to provide feedback on the gear selection status.

[0016] A gearbox equipped with any of the aforementioned shift actuators.

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

[0018] The shifting actuator and gearbox of this utility model adopt a shifting mechanism and a gear selection mechanism arranged on the housing. Independent oil chambers are set at both ends of the corresponding shifting shaft and gear selection shaft. The oil pressure of each oil chamber is controlled by a solenoid valve, which causes the shifting shaft and gear selection shaft to translate along their respective axes, thereby pushing the gear selection lever to translate and deflect, and completing the gear selection and shifting action. The overall structure is simple, compact, easy and convenient to install, efficient in gear selection and shifting action, and low in cost. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the bottom structure of a gear shifting actuator according to the present invention.

[0020] Figure 2 This is a schematic diagram showing the spatial relationship between the shift shaft and the selector shaft of a shift actuator according to the present invention.

[0021] Figure 3 This is a front cross-sectional view of a gear shifting actuator according to the present invention.

[0022] Figure 4 This is a left-side cross-sectional view of a gear shifting actuator according to the present invention.

[0023] Figure 5 This is a schematic diagram of the housing structure of a gear shifting actuator according to the present invention.

[0024] Figure 6This is a schematic diagram of the gear selection oil circuit structure of a gear shifting actuator according to the present invention.

[0025] Figure 7 This is a schematic diagram of the shifting oil circuit structure of a shifting actuator according to the present invention.

[0026] in:

[0027] 1. Housing; 2. Gear shifting mechanism; 3. Gear selection mechanism; 4. Gear shift lever; 5. Plug;

[0028] Solenoid valve 11, shift sensor 12, gear selection sensor 13, shift shaft 21, oil chamber A 22, oil chamber B 23, groove 24, shift sensor block 25, gear selection shaft 31, oil chamber C 32, oil chamber D 33, countersunk hole 34, spring 35, shift finger 41, snap ring 42, gear selection sensor block 43. Detailed Implementation

[0029] Example 1

[0030] See Figures 1-7 The present invention relates to a gear shifting actuator, comprising a housing 1, a gear shifting mechanism 2 and a gear selection mechanism 3 installed inside the housing 1, and a gear shift lever 4 installed between the gear shifting mechanism 2 and the gear selection mechanism 3;

[0031] The shifting mechanism 2 includes a shifting shaft 21, and oil chambers A22 and B23 symmetrically arranged on the housing 1 and respectively accommodating the two ends of the shifting shaft 21; the oil pressure of oil chambers A22 and B23 is controlled respectively to control the shifting shaft 21 to translate along its axial direction in the two oil chambers; in this embodiment, the axial direction of the shifting shaft 21 is set to the X direction;

[0032] The gear selection mechanism 3 includes a gear selection shaft 31, and oil cavities C32 and D33 symmetrically arranged on the housing 1 to accommodate the two ends of the gear selection shaft 31 respectively; the oil pressure of oil cavities C32 and D33 is controlled respectively to control the gear selection shaft 31 to translate along its axial direction in the two oil cavities; in this embodiment, the axial direction of the gear selection shaft 31 is set to the Y direction; countersunk holes 34 are provided at both ends of the gear selection shaft 31, and springs 35 are provided in the countersunk holes 34 to abut against oil cavities C32 or D33;

[0033] The four oil chambers, namely oil chambers A22, B23, C32, and D33, are all cylindrical cavities set on the housing 1. A sealing plug 5 is screwed into the outer end of the cavity. The two ends of the spring 35 abut against the plug 5 and the countersunk hole 34 of the gear selection shaft 31, respectively. The spring 35 increases the return speed of the gear selection shaft 31, making the gear selection action more sensitive.

[0034] The shift shaft 21 is located directly above the gear selector shaft 31 and the two are perpendicular to each other, that is, the X direction and the Y direction are perpendicular to each other; the bottom of the middle part of the shift shaft 21 is provided with a groove 24 for fitting the top of the shift lever 4, and the top is provided with a shift sensing block 25. The shift sensing block 25 cooperates with the shift sensor 12 installed on the housing 1 to provide feedback on the shift status.

[0035] The shift lever 4 is rotatably mounted in the middle of the gear selection shaft 31 and moves along the axial direction of the gear selection shaft 31. Its top is movably connected to the middle of the shift shaft 21, and its bottom is provided with a shift finger 41. The shift lever 4 is restricted from sliding along the axial direction of the gear selection shaft 31 by two retaining springs 42 that are snapped onto the gear selection shaft 31 on both sides of its middle section. A gear selection sensor block 43 is installed on one side of the middle section of the shift lever 4. The gear selection sensor block 43 cooperates with the gear selection sensor 13 installed on the housing 1 to provide feedback on the gear selection status.

[0036] The housing 1 is provided with four sets of oil circuits and solenoid valves 11, which are respectively connected to oil chambers A22, B23, C32 and D33. The oil pressure entering each oil chamber is controlled by controlling the opening and closing of the solenoid valves 11, thereby causing the shift lever 4 to translate in the Y direction and deflect around the central rotation center. Then, the shift finger 41 located at the bottom of the shift lever 4 completes the translational movement to select different gear shift forks to achieve the gear selection function, and the deflection action pushes the shift fork to achieve the gear shifting function.

[0037] The gear shifting actuator of this utility model has a simple overall structure, small size, easy and convenient installation, efficient gear shifting action, and low cost. Example 2

[0038] A gearbox is provided, which is equipped with the shifting actuator of Embodiment 1 above. It has a simplified structure, occupies a small volume, is easy and convenient to install, and has a low cost.

[0039] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A gear shifting actuator, comprising a housing (1), a gear shifting mechanism (2) and a gear selection mechanism (3) installed inside the housing (1), and a gear shift lever (4) installed between the gear shifting mechanism (2) and the gear selection mechanism (3), characterized in that: The shifting mechanism (2) includes a shifting shaft (21), oil chambers A (22) and B (23) symmetrically arranged on the housing (1) and respectively accommodating the two ends of the shifting shaft (21); the oil pressure of oil chambers A (22) and B (23) is controlled respectively to control the shifting shaft (21) to translate along its axial direction in the two oil chambers; The gear selection mechanism (3) includes a gear selection shaft (31), oil chambers C (32) and D (33) symmetrically arranged on the housing (1) and respectively accommodating the two ends of the gear selection shaft (31); the oil pressure of the oil chambers C (32) and D (33) is controlled respectively to control the gear selection shaft (31) to translate along its axial direction in the two oil chambers; The shift shaft (21) is located directly above the gear selection shaft (31) and the two are perpendicular to each other; the middle part of the shift lever (4) is rotatably set in the middle of the gear selection shaft (31) and moves along the axial direction of the gear selection shaft (31) along with the gear selection shaft (31); the top is movably connected to the middle of the shift shaft (21); and the bottom is provided with a shift finger (41). The housing (1) is provided with four sets of oil circuits and solenoid valves (11), which are respectively connected to oil chambers A (22), B (23), C (32) and D (33).

2. The gear shifting actuator according to claim 1, characterized in that: The four oil cavities, namely oil cavity A (22), oil cavity B (23), oil cavity C (32) and oil cavity D (33), are all cylindrical cavities set on the shell (1), and a sealing plug (5) is screwed on the outer end of the cavity.

3. The gear shifting actuator according to claim 1, characterized in that: The bottom of the middle part of the shift shaft (21) is provided with a groove (24) for fitting the top of the shift lever (4), and a shift sensing block (25) is provided on the top; the shift sensing block (25) cooperates with the shift sensor (12) installed on the housing (1) to provide feedback on the shift status.

4. The gear shifting actuator according to claim 1, characterized in that: The selection shaft (31) has countersunk holes (34) at both ends, and springs (35) are installed in the countersunk holes (34) to press against the oil chamber C (32) or the oil chamber D (33).

5. The gear shifting actuator according to claim 1, characterized in that: The shift lever (4) is restricted from sliding axially along the shift shaft (31) by two snap rings (42) that are snapped onto the shift shaft (31) on both sides of the middle part.

6. The gear shifting actuator according to claim 1, characterized in that: A gear selection sensor block (43) is installed on one side of the middle part of the gear shift lever (4). The gear selection sensor block (43) works with the gear selection sensor (13) installed on the housing (1) to provide feedback on the gear selection status.

7. A gearbox, characterized in that: The gear shifting actuator as described in any one of claims 1 to 6 is installed.

Images