Abstract

A supporting structure for a reverse countershaft of a transmission includes a transmission case, a partition wall and a boss, wherein the transmission case, the partition wall and the boss are formed integrally; a reverse idler gear installation space is provided between a side, close to a transmission main case, of the partition wall and the boss; and the partition wall is provided with a second reverse countershaft supporting hole and an auxiliary case countershaft supporting hole which are not concentric. In supporting structure for the reverse countershaft of the transmission, multiple ribs are used to support the boss of the reverse countershaft, the boss of the reverse intermediate shaft is cast until reaching the rear auxiliary case partition wall, and in combination with machining work, the reverse idle wheel space is milled by a disc milling cutter.

IPC Classes  ?

• F16H 57/021 - Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
• F16H 3/08 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously- meshing gears, that can be disengaged from their shafts
• F16H 57/02 - GearboxesMounting gearing therein

Abstract

A transmission operating mechanism includes an operating housing, wherein an inner shifting shaft is provided in the operating housing, and the operating housing is provided with, from left to right, a first position-limiting structure installation hole, a shifting block installation cavity, a second position-limiting structure installation hole and a balancing spring installation cavity; and a shifting block is installed in the shifting block installation cavity and is connected to the inner shifting shaft via a shifting block positioning pin. The spatial position of the operating housing is fully utilized to effectively arrange each functional component, and the requirement for modification is fully considered within the limited dimensional range. Therefore, various operation modes may be achieved by simply providing several modified parts without changing the operating housing.

IPC Classes  ?

• F16H 59/02 - Selector apparatus
• F16H 63/20 - Multiple final output mechanisms being moved by a single common final actuating mechanism with preselection and subsequent movement of each final output mechanism by movement of the final actuating mechanism in two different ways, e.g. guided by a shift gate
• F16H 63/30 - Constructional features of the final output mechanisms

Abstract

A structure for reducing the effort required to shift gears in a heavy-duty transmission. A shifting fork shaft (3) is arranged in the case (1) of a transmission. A linear bearing (5) is arranged between the outer surface of the shift fork shaft (3) and the inner surface of the case (1), thus transforming the sliding friction of a large area into the rolling friction of each rolling element of the linear bearing. The present structure effectively reduces the effort required to shift gears, improves shift smoothness and overcomes the poor wear-resistance and damage caused by pulling in conventional shift fork structures, while also reducing the likelihood of irreparable damage to the transmission case caused by over-grinding of holes on said case.

IPC Classes  ?

• F16H 63/32 - Gear shifter yokes

Abstract

A reverse gear intermediate shaft supporting structure of a transmission comprises a transmission housing (100), a partition wall (101) and a boss (Q). The transmission housing (100), the partition wall (101) and the boss (Q) are in an integrated structure; a reverse gear idle wheel installation space (J) is arranged between one side, close to a main box of the transmission, of the partition wall (101) and the boss (Q); the partition wall (101) is provided with a second reverse gear intermediate shaft supporting hole (K2) and an auxiliary box intermediate shaft supporting hole (K) that are non-concentric; one side, close to the transmission housing (100), of the boss (Q) is supported on the transmission housing (100) through several ribs (a) and web plates (b, c) are arranged among the several ribs (a). In the reverse gear intermediate shaft supporting structure of the transmission, multiple ribs (a) are used to support the boss (Q) of the reverse gear intermediate shaft, the boss (Q) of the reverse gear intermediate shaft is cast to the back auxiliary box partition wall (101), and in combination with machining work, a disc milling cutter is used to mill the reverse gear idle wheel space (J).

IPC Classes  ?

• F16H 57/021 - Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings

Abstract

A transmission operating mechanism comprises a operating housing (1), and an inner shifting shaft (3) is arranged in the operating housing (1). A first limiting structural installation hole (100), a shifting fork installation cavity (200), a second limiting structural installation hole (300) and a balance spring installation cavity (400) are sequentially arranged in the operating housing (1) from left to right. A shifting fork (4) which is connected with the inner shifting shaft through a shifting fork positioning pin (13) is arranged in the shifting fork installation cavity. The transmission operating mechanism can complete various operating types through making full use of the space in the operating housing, effectively configuring each functional component in a limited size range, with fully considering the need of a variant, just only changing several modified parts without changing the operating housing. The transmission operating mechanism can be applied to various operational types and any combination among single pole, double poles, single H, double H, left operating, right operating, with booster, without booster and the like, therefore, the number of modified parts is effectively reduced, production cost and stock cost are reduced, and the misloading phenomenon caused by excessive peripheral parts is avoided.

IPC Classes  ?

• F16H 59/02 - Selector apparatus

Abstract

A front auxiliary box cylinder of an automobile transmission comprises a cylinder housing (1), a cylinder head (6), a piston (10), a seal ring (13), a fastening apparatus (11, 12) and a fork shaft (15). The cylinder housing (1) is disposed on a front end surface of a main box and in a clutch housing. The cylinder head (6) is fixedly connected to the cylinder housing (1) by a locking bolt. One end of the fork shaft (15) is connected to the piston (10), and the other end is disposed in the clutch housing or a fork shaft hole (16) of an upper cover of the transmission. A seal ring of the fork shaft and the cylinder housing can be replaced by sequentially dismounting the cylinder head, the piston and fastening apparatus, so as to solve the problem that the fork shaft needs to be dismounted to replace the seal ring.

IPC Classes  ?

• F16H 61/38 - Control of exclusively fluid gearing
• B60K 20/00 - Arrangement or mounting of change-speed gearing control devices in vehicles

Abstract

A gear position detecting device of a secondary gearbox of a transmission. The device transmits a signal of the gear position of the secondary gearbox to a signal switch (5) by a step on a shifting fork (8) of the secondary gearbox or a step on a shifting fork shaft of the secondary gearbox. The signal switch (5) is arranged on the side of a back cover (7) and is lower than a maximum outline plane of the transmission. A step for pushing the signal switch (5) of the secondary gearbox is arranged on the shifting fork (8) or the shifting fork shaft of the secondary gearbox. Therefore, the signal of the gear position can be transmitted to the signal switch (5) by the shifting fork (8) or the shifting fork shaft of the secondary box so as to guide the driver.

IPC Classes  ?

• F16H 63/42 - Ratio indicator devices

Abstract

A lock pin-type automobile synchronizer includes a higher gear conical ring (1) and a lower gear conical ring (4) which are arranged at the sides of a sliding gear sleeve (3). A higher gear lock pin (2) is fixed to one side of the higher gear conical ring (1). A lower gear lock pin (5, 6) is fixed to one side of the lower gear conical ring (4). A pin hole corresponding to the higher gear (2) lock pin and the lower gear lock pin (5, 6) is arranged on the sliding gear sleeve (3). The number of lower gear lock pins (5, 6) is higher than the number of higher gear lock pins (2).

IPC Classes  ?

• F16D 13/30 - Friction clutches with axially-movable clutching members with conical friction surfaces in which the or each axially-movable member is pressed exclusively against an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member in which the clutching pressure is produced by springs only
• F16H 3/38 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with synchro-meshing

Abstract

A lock pin-type automobile synchronizer includes a higher gear conical ring (1) and a lower gear conical ring (4) which are arranged at the sides of a sliding gear sleeve (3). A higher gear lock pin (2) is fixed to one side of the higher gear conical ring (1). A lower gear lock pin (5, 6) is fixed to one side of the lower gear conical ring (4). A pin hole corresponding to the higher gear (2) lock pin and the lower gear lock pin (5, 6) is arranged on the sliding gear sleeve (3). The number of lower gear lock pins (5, 6) is higher than the number of higher gear lock pins (2).

IPC Classes  ?

• F16D 23/02 - Arrangements for synchronisation

Abstract

A lock pin-type automobile synchronizer includes a higher gear conical ring (1) and a lower gear conical ring (4) which are arranged at the sides of a sliding gear sleeve (3). A higher gear lock pin (2) is fixed to one side of the higher gear conical ring (1). A lower gear lock pin (5, 6) is fixed to one side of the lower gear conical ring (4). A pin hole corresponding to the higher gear (2) lock pin and the lower gear lock pin (5, 6) is arranged on the sliding gear sleeve (3). The number of lower gear lock pins (5,6) is higher than the number of higher gear lock pins (2).

IPC Classes  ?

• F16D 23/02 - Arrangements for synchronisation

Abstract

A multi-speed compound vehicular transmission having an auxiliary section with three countershafts is composed of a main section and an auxiliary section. The main section includes an input shaft (1), a main shaft (40) and a number of synchronizers (39´). There are two countershafts (5) disposed symmetrically and equidistantly on two sides of the main shaft (40). The auxiliary section includes an auxiliary main shaft (25) and a synchronizer (23). The main shaft (25) is provided with a reduction gear (22). There are three countershafts (19) disposed parallel and distributed with equal distance around the main shaft (25). The output end of the auxiliary main shaft (25) is connected with a flange (26).

IPC Classes  ?

• B60K 17/08 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of change-speed gearing of mechanical type
• F16H 3/02 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion

Abstract

A main section and auxiliary section type dual-countershaft twelve-speed transmission for vehicle is comprised of a main section and an auxiliary section. The main section includes a first shaft (1), a second shaft (10) and several countershafts (14) provided on both sides of the second shaft (10). There is gear drive provided between the second shaft and the countershaft. There are six gears on the second shaft, each of which is positioned independently. There are three synchronizers (4) on the second shaft. A shifting fork (5) of the synchronizer is connected to the control mechanism and gear lever by a fork shaft (16). A main shaft (20) and a countershaft (22) are provided in the auxiliary section. The gear (29) engages with the gear (28), and the gear (25) engages with the gear (30). A synchronizer (9), the shifting fork (15) and the fork shaft (31) are provided between the gear (25) and the gear (29). The synchronizer is self-locked by the reverse taper teeth. The fork shaft is self-locked by the mechanism composed of a spring (18) and a steel ball (19).

IPC Classes  ?

• B60K 17/08 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of change-speed gearing of mechanical type
• F16H 61/00 - Control functions within change-speed- or reversing-gearings for conveying rotary motion