Gear selection and shifting mechanism for medium-sized longitudinal AMT

Abstract

A shift and selection mechanism for a medium-sized longitudinal AMT includes: a shift and selection shaft disposed inside a housing, and an interlocking plate, a shifting head, a shifting head and a signal block sequentially sleeved on the shift and selection shaft, wherein: the shifting head is located inside the interlocking plate and contacts the groove of the shifting lever of the electro-hydraulic control unit, and the shifting head contacts the groove of the shifting lever of the electro-hydraulic control unit. The present invention separates the electro-hydraulic control unit from the transmission body, so that the design and expansion of the two have greater flexibility, and the electro-hydraulic control unit can provide a greater output force by modification without being overly constrained by the structure of the mechanical transmission body.

Description

Technical Field

[0001] The present invention relates to a technology in the field of mechanical automatic transmission, in particular to a gear selection and shifting mechanism for a medium-sized longitudinally mounted AMT. Background Art

[0002] At present, domestically developed medium-sized longitudinal AMTs are rare. In the existing technology, the electro-hydraulic controlled gear selection and shift actuator is basically directly connected to the mechanical transmission body. This connection method requires the electro-hydraulic control unit to complete the rotational motion for gear shifting and the linear motion for gear selection. This affects the expansion of the electro-hydraulic control unit to products with larger torque and is difficult to adapt to medium-sized longitudinal transmission products with larger shifting force. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention proposes a gear selection and shift conversion mechanism for a medium-sized longitudinally mounted AMT, which is combined with a new electro-hydraulic control unit that can perform linear motion during gear selection and shifting. The gear selection and shifting linear motion of the new electro-hydraulic control unit is directly converted into the gear shifting rotational motion and gear selection linear motion of the mechanical transmission body, thereby well connecting the new electro-hydraulic control unit and the mechanical transmission body, thereby realizing the application of the electro-hydraulic control unit of the new AMT in a medium-sized longitudinally mounted transmission.

[0004] The present invention is achieved through the following technical solutions:

[0005] The present invention comprises: a shift selector shaft arranged inside a housing, and an interlocking plate, a shift dial head, a shift selector head and a signal block which are sequentially sleeved on the shift selector shaft, wherein: the shift dial head is located inside the interlocking plate and contacts with a groove of a shift lever of an electro-hydraulic control unit, and the shift selector head contacts with a groove of a shift lever of the electro-hydraulic control unit.

[0006] The shifting head and the gear selecting head are both provided with elastic cylindrical pins for fixedly connecting the gear selecting and shifting shaft.

[0007] The shifting head comprises: an axial upper shifting head, a hollow cylinder and a radial lower shifting head which are connected in sequence.

[0008] Technical Effects

[0009] Compared with the prior art, the present invention separates the electro-hydraulic control unit from the transmission body, so that the design and expansion of the two have greater flexibility. The electro-hydraulic control unit can provide greater output force through modification without being overly constrained by the structure of the mechanical transmission body. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the combination of the electro-hydraulic control unit and the present invention;

[0011] Figure 2 A schematic diagram of an electro-hydraulic control unit and an interface of the present invention;

[0012] Figure 3 It is a structural schematic diagram of the present invention;

[0013] Figure 4 a and Figure 4 b is a schematic diagram of the structure of the shift knob;

[0014] Figure 5 This is a schematic diagram of the shift knob operation;

[0015] Figure 6 This is a schematic diagram of the gear selector knob and signal block;

[0016] Figure 7 This is a schematic diagram of the gear selector;

[0017] Figure 8 It is a schematic diagram of the signal block;

[0018] Fig. 9 It is a schematic diagram of the interlocking plate and the reverse mechanism;

[0019] In the figure: electro-hydraulic control unit A, conversion mechanism B, gear selector lever 1, shift lever 2, housing 3, gear selector and shift shaft 4, shift dial head 5, gear selector dial head 6, interlocking plate 7, signal block 8, connecting bolt 9, first elastic cylindrical pin 10, axial upper dial head 11, radial lower dial head 12, hollow cylinder 13, second elastic cylindrical pin 14, boss 15, open-type Wang-shaped groove 16, first elastic cylindrical pin hole 17, Wang-shaped groove locating pin 18, reversing light switch 19, gear shift fixed row pin 20, 5 / 6 gear reverse plate 21, reverse plate bracket 22, interlocking block 23. DETAILED DESCRIPTION

[0020] like Figures 1 to 3 As shown, this embodiment separates the electro-hydraulic control unit A and the mechanical part of the transmission, making the two more flexible. This embodiment includes: a shift selector shaft 4 disposed inside the housing 3, and an interlocking plate 7, a shift knob 5, a shift selector knob 6 and a signal block 8 sequentially sleeved on the shift selector shaft 4, wherein: the shift knob 4 is located inside the interlocking plate 7 and contacts the groove of the shift lever 2 of the electro-hydraulic control unit A, and the shift knob 6 contacts the groove of the shift lever 1 of the electro-hydraulic control unit A.

[0021] The shift knob 5 and the selector knob 6 are both provided with elastic cylindrical pins 10 for fixedly connecting the selector shaft.

[0022] like Figure 4As shown in FIG. 1 , the shift head 5 comprises: an axial upper shift head 11, a hollow cylinder 13 and a radial lower shift head 12 which are connected in sequence, wherein: the axial upper shift head 11 contacts the groove of the shift lever 2 of the electro-hydraulic control unit A, the hollow cylinder 13 is sleeved on the shift selector shaft 4, and the radial lower shift head 12 contacts the fork groove of the transmission fork.

[0023] The plate ribs of the axial upper shift head 11 are connected to the incomplete cylindrical shift contact area, and the surface of the contact area is heat treated.

[0024] The radial lower shift head 12 is a shift head with an inclined surface to meet the tangential shifting requirements.

[0025] like Figure 4 As shown in FIG. 2 , the shift knob 5 is provided with a boss 15 for triggering the reverse light switch and an open-type king-shaped groove 16 for positioning after unloading the force of shifting.

[0026] The open-type W-shaped groove 16 is a convex block structure arranged in an array, the distance between two axially adjacent convex blocks is the gear selection stroke, and the angle covered by two circumferential convex blocks is the gear shift stroke.

[0027] like Figure 5 As shown, the working process of the shift head 5 is as follows: the shift head 5 is nested in the interlocking plate 7 and moves synchronously in the axial direction. According to different gear selection positions, when the shift head 5 stops moving, the gap of the open king-shaped groove 16 is directly opposite to the king-shaped groove positioning pin 18. When the reverse gear is selected and the gear is engaged, the boss 15 pushes the push rod of the reverse light switch 19, triggering the switch to turn on.

[0028] like Figure 6 to Figure 8 As shown, the shift selector head 6 and the signal block 8 are respectively sleeved on the shift selector shaft 4, and the shift pin 20 is in contact with the side of the signal block 8. When the shift selector shaft 4 rotates, the signal block 8 rotates, and the corrugated groove on the signal block 8 compresses the spring in the shift pin 20 to achieve changes in the shift force and the shift feel.

[0029] like Figure 7 As shown, the shift selector head 6 is fixedly connected to the shift selector shaft 4 via a spring pin and is not restricted by the height of the shift selector lever 1 , ensuring that the swing of the shift selector head 6 during the shifting process will not escape from the notch of the shift selector lever 1 .

[0030] like Figure 8 As shown, the top of the signal block 8 is provided with the corrugated groove, the shape of which is used to control the shifting force and the shifting feel. The signal block 8 is further provided with a boss which serves as a neutral switch trigger.

[0031] like Fig. 9As shown, the shell 3 is further provided with a 5 / 6 gear reverse plate 21 and a reverse plate bracket 22, wherein: the 5 / 6 gear reverse plate 21 is rotatably connected to the reverse plate bracket 22, and when the shift head 5 moves the 5 / 6 gear reverse plate 21 to the left or right, the 5 / 6 gear reverse plate 21 correspondingly moves the shift fork to the right or left.

[0032] The interlocking plate 7 is provided with an interlocking block 23 for gear interlocking, which can prevent other shift forks from shifting into gear when one shift fork enters a gear.

[0033] The device works in the following manner: the linear motion of the shift lever 2 is converted into the rotational motion of the shift head 5, and then converted into the linear motion of the shift fork, thereby realizing the control of the shift by the electro-hydraulic control unit A; the shift selector head 6 contacts the groove of the shift lever 1 of the electro-hydraulic control unit A, thereby realizing the control of the shift by the electro-hydraulic control unit A. Specifically, the shift conversion is: the shift lever 2 moves, thereby pushing the axial upper shift head 11 of the shift head 5 of the device to move, driving the shift head 5 to rotate, and the radial lower shift head 12 of the shift head 5 rotates at the same time, thereby driving the shift fork inside the transmission to move, thereby realizing the shift; specifically, the shift selection conversion is: the shift lever 1 moves, thereby pushing the shift selector head 6 of the device to move, the shift selector head 6 is connected to the shift shaft 4 through the second elastic cylindrical pin 14, driving the shift shaft 4 to move, the shift shaft 4 and the shift head 5 are connected through the first elastic cylindrical pin 10, thereby driving the shift head 5 to move to the target gear selection position.

[0034] The electro-hydraulic control unit A controls the oil pressure by means of an oil pot storing oil, a motor boosting, an energy storage tank storing energy, and a solenoid valve, and the oil pressure drives the shift shaft and the gear selection shaft to perform linear motion respectively; after the mechanical transmission body is docked with the radial lower shift head 12 of the shift shift head 5 of the device, the rotation of the radial lower shift head 12 causes the shift fork to perform linear motion, and the shift fork then drives the gear sleeve to perform linear motion, thereby realizing the shifting in the transmission body.

[0035] This device can realize the conversion of MT into AMT without changing the MT gearbox parts, thus saving a large amount of product development costs. It is also suitable for matching other electro-hydraulic control units and has a wider adaptability.

[0036] The above-mentioned specific implementation can be partially adjusted in different ways by those skilled in the art without departing from the principle and purpose of the present invention. The protection scope of the present invention shall be based on the claims and shall not be limited by the above-mentioned specific implementation. Each implementation scheme within its scope shall be subject to the constraints of the present invention.

Claims

1. A gear selection and shifting mechanism for a medium-sized longitudinal AMT, characterized in that: include: A shift selector shaft is arranged inside the housing, and an interlocking plate, a shifting head, a shift selector head and a signal block are sequentially sleeved on the shift selector shaft, wherein: the shifting head is located inside the interlocking plate and contacts with a groove of a shift lever of an electro-hydraulic control unit, and the shift selector head contacts with a groove of a shift lever of an electro-hydraulic control unit; The shift knob and the selector knob are both provided with elastic cylindrical pins for fixedly connecting the selector shaft; The shifting head comprises: an axial upper shifting head, a hollow cylinder and a radial lower shifting head connected in sequence; The conversion mechanism is connected to the electro-hydraulic control unit and the transmission body respectively through connecting bolts, wherein: the protruding surface of the axial upper shift head of the conversion mechanism is combined with the electro-hydraulic control unit, and the protruding surface of the radial lower shift head of the conversion mechanism is combined with the transmission body; The plate ribs of the axial upper shift head are connected to the incomplete cylindrical shift contact area, and the surface of the contact area is heat treated; the radial lower shift head is a shift head with an inclined surface; The shift knob is provided with: a boss for triggering the reverse light switch and an open king-shaped groove for positioning after unloading the force when shifting into a gear; The open-type Wang-shaped groove is a convex block structure arranged in an array, the distance between two axially adjacent convex blocks is the gear selection stroke, and the angle covered by two circumferential convex blocks is the gear shift stroke; The shift selector and the signal block are respectively sleeved on the shift selector shaft, the shift pin contacts the side of the signal block, and the signal block rotates when the shift selector shaft rotates, and the wave groove on the signal block compresses the spring in the shift pin to achieve the change of the shift force and the shift feel; The top of the signal block is provided with a wave-shaped groove for controlling the shifting force and shifting feel; The signal block is further provided with a boss that serves as a neutral switch trigger; The housing is further provided with a 5 / 6 gear reverse plate and a reverse plate bracket, wherein: the 5 / 6 gear reverse plate is rotatably connected to the reverse plate bracket, and when the shifting head shifts the 5 / 6 gear reverse plate to the left or right, the 5 / 6 gear reverse plate correspondingly shifts the shift fork to the right or left; An interlocking block for gear interlocking is arranged on the interlocking plate, which can prevent other shift forks from shifting into gear when one shift fork enters a gear.

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