Synchronizing device of manual transmission

Abstract

The invention discloses a manual transmission synchronizing device, and mainly relates to the technical field of mechanical transmissions. Comprising a main shaft, a hub which is sleeved on the main shaft and is in key connection with the main shaft, a sleeve which is sleeved on the hub, is in key connection with the hub and can slide along the axial lead of the main shaft, and change gears which are arranged on the front side and the rear side of the sleeve and are sleeved on the main shaft, the synchronizing device comprises an annular fixing part fixed to the side, close to the sleeve, of the change gear, a plurality of plate springs obliquely extending in the axial lead direction of the annular fixing part are arranged on the edge of the outer side of the annular fixing part, and a synchronous plug connector is fixedly arranged at the end, away from the annular fixing part, of each plate spring. The sleeve is provided with a synchronous insertion hole matched with the synchronous insertion piece. The present invention can improve production efficiency and assembly efficiency by integrally manufacturing a conventional synchronizer.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical transmissions, in particular to a manual transmission synchronizing device. Background Art

[0002] Generally speaking, in a manual transmission, if the gear engagement is suddenly changed to change the vehicle speed, the speed of each gear will not match, resulting in gear damage. In order to prevent this, the gear speed must be adjusted. After basic matching, the gears should mesh at the same speed.

[0003] The synchronous engagement device of the conventional manual transmission includes a main shaft receiving the rotational force from the engine and a wheel hub connected to the outer peripheral surface of the main shaft and rotating. A sleeve is provided on the outer peripheral surface of the wheel hub and is slidable and interlocked with the wheel hub through a spline, and a pair of speed gears are provided on both sides of the outer peripheral surface of the wheel hub. The sleeve of the main shaft can selectively engage with the speed gear, and a synchronization device is formed on the speed gear, which is elastically supported and transmits the rotational force of the sleeve to the speed gear. When the sleeve slides, insertion grooves are formed on both sides thereof, and the speed gear has a plurality of fixed grooves facing each other.

[0004] Among them, the synchronizing device includes a spring inserted into the fixing groove, and is fastened to the end of the spring to elastically fix the sleeve. The synchronizing device is provided with a ball. According to the synchronizing device of the conventional manual transmission constructed as described above, when the user operates the shift lever to change the vehicle speed, the sleeve does not move. The guide rail and the shift fork slide in one direction.

[0005] In addition, the rotational force of the sleeve is gradually transmitted to the speed change gear through the ball of the synchronizing device fixed to the speed change gear. The rotation speed of the main shaft can be controlled by synchronizing with the speed change gear. However, according to the synchronizing device of the conventional manual transmission, the ball and the spring are manufactured separately, and the ball is stuffed to be fastened to the end of the spring to prevent it from falling off. Since additional processes such as these must be performed, there is a problem of reduced product production efficiency and assembly efficiency. Summary of the invention

[0006] The object of the present invention is to solve the problems existing in the prior art and to provide a manual transmission synchronizing device, which can improve production efficiency and assembly efficiency by manufacturing the traditional synchronizing device in one piece.

[0007] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0008] A manual transmission synchronization device comprises a main shaft, a wheel hub sleeved on the main shaft and connected with the main shaft key, a sleeve sleeved on the wheel hub and connected with the wheel hub key and capable of sliding along the axis of the main shaft, and a speed gear arranged on the front and rear sides of the sleeve and sleeved on the main shaft, a synchronization device is arranged between the sleeve and the speed gear, the synchronization device comprises an annular fixing component fixed to a side of the speed gear close to the sleeve, the outer edge of the annular fixing component is provided with a plurality of leaf springs obliquely extending toward the axis of the annular fixing component, a synchronization connector is fixedly provided at one end of the leaf spring away from the annular fixing component, and a synchronization connector hole adapted for the synchronization connector is provided on the sleeve.

[0009] Preferably, a plurality of plug-in lugs are provided on a side of the annular fixing component close to the speed gear, and the plug-in lugs are inserted into the speed gear and fixedly connected to the speed gear.

[0010] Preferably, a spline connection is adopted between the main shaft and the wheel hub, and between the sleeve and the wheel hub.

[0011] Preferably, the synchronous connector is a plate protruding in a semicircular shape toward one side of the sleeve.

[0012] Preferably, the synchronous plug hole is an arc-shaped hole.

[0013] Preferably, the number of the synchronous connectors is greater than the number of the synchronous connector holes.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] According to the synchromesh device for a manual transmission of the present invention, since the synchromesh device is manufactured during the manufacturing process, the production efficiency and assembly efficiency of the synchromesh device can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 is a cross-sectional view of a synchronizing device of a conventional manual transmission;

[0018] Figure 3 yes Figure 2 A three-dimensional diagram of the engagement contact state between the sleeve and the synchronizing device.

[0019] The numbers in the accompanying drawings are: 1, main shaft; 2, wheel hub; 3, sleeve; 4, speed gear; 5, annular fixing component; 51, plug-in lug; 6, leaf spring; 7, synchronous plug-in part; 8, synchronous plug-in hole; 9, ball; 91, spring; 92, insertion groove. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0021] like Figure 2-3 As shown, the synchronous engagement device of the conventional manual transmission includes a main shaft 1 , a wheel hub 2 , a sleeve 3 , a pair of speed change gears 4 , a ball 9 , a spring 91 , and an insertion groove 92 .

[0022] Example: Figure 1 The present invention is a manual transmission synchronizing device, comprising a main shaft 1 receiving the rotational force from the engine, a hub 2 which is spline-connected and rotates on the outer peripheral surface of the main shaft 1, and a sleeve 3 which is slidably arranged on the outer peripheral surface of the hub 2 and spline-connected and interlocked with the hub 2. On both sides of the main shaft 1, a pair of speed gears 4 are arranged on the outer peripheral surface of the main shaft 1 and can selectively engage with the sleeve 3, and are elastically supported on the speed gears 4. When the sleeve 3 slides, the synchronizing device transmits the rotational force of the sleeve 3 to one of the speed gears 4. The pair of speed gears 4 have different gear ratios, and the synchronizing device includes an annular fixing component 5, which is provided with a plurality of protruding plug-in lugs 51 to be inserted and fixed into each fixing groove formed on one surface of the speed gear 4. A plurality of leaf springs 6 are provided on the annular fixing component 5, and the leaf springs 6 radially protrude to one side of the annular fixing component 5 and extend to the opposite side of the lug 51 to provide elastic force. The plug-in lug 51 can be designed into various shapes as long as it can be inserted into and fixed in the fixing groove of the speed change gear 4, and the leaf spring 6 also has a synchronous plug-in component 7 at one end away from the annular fixing component 5. In addition to the plate shape, the synchronization device can also consider various shapes as long as it can provide elastic force.

[0023] In addition, the synchronous plug 7 has a plate surface that is semicircularly protruding in one direction of the sleeve 3, and the synchronous plug 7 can be selectively inserted into one side of the sleeve 3. Its structure is formed to correspond to the synchronous plug hole 8. The number of synchronous plugs 7 is greater than the number of synchronous plug holes 8 to further increase the synchronization speed, and the annular fixing part 5 is provided between the fixing parts, so that the synchronizer can be in close contact with the speed gear 4. According to the manual transmission synchronizer of the present invention configured as described above, when the user operates the shift lever (not shown) to change the vehicle speed, the sleeve 3 is bound to the shift rail and the shift fork (not shown) and slides in one direction.

[0024] The rotational force of the sleeve 3 is transmitted to the speed gear 4 through the synchronization plug 7, thereby increasing the speed. The main shaft 1 can be adjusted by synchronizing with the speed gear 4. That is, when the sleeve 3 connected with the spline rotates with the hub 2, the rotation speed of the sleeve 3 is relatively fast at the beginning of the gear shift, so the sleeve 3 is inserted, and the rotational force is greater than the engagement contact force relative to the synchronization plug hole 8, so the synchronization plug 7 is easily disengaged from the synchronization plug hole 8. However, as the locking contact response structure of the sleeve 3 and the synchronization device is repeated, the rotation speeds of the sleeve 3 and the speed gear 4 gradually become the same, and the rotation speeds of the sleeve 3 and the speed gear 4 are synchronized in this way. The sleeve 3 is fully in contact with the speed gear 4, thereby increasing the gear ratio of the speed gear 4. It is transmitted to the main shaft 1 through the synchronization device to manually change the vehicle speed.

Claims

1. A manual transmission synchronizing device, comprising a main shaft (1), a wheel hub (2) sleeved on the main shaft (1) and connected to the main shaft (1) by a key, a sleeve (3) sleeved on the wheel hub (2) and connected to the wheel hub (2) by a key and capable of sliding along the axis of the main shaft (1), and a speed gear (4) arranged on the front and rear sides of the sleeve (3) and sleeved on the main shaft (1), a synchronizing device is provided between the sleeve (3) and the speed gear (4), and is characterized in that: The synchronization device comprises an annular fixing component (5) fixed to a side of the speed change gear (4) close to the sleeve (3); a plurality of leaf springs (6) extending obliquely toward the axial center line direction of the annular fixing component (5) are provided on the outer edge of the annular fixing component (5); a synchronization plug-in component (7) is fixedly provided at one end of the leaf spring (6) away from the annular fixing component (5); and a synchronization plug-in hole (8) adapted to the synchronization plug-in component (7) is provided on the sleeve (3).

2. A manual transmission synchronizing device according to claim 1, characterized in that: A plurality of plug-in lugs (51) are provided on one side of the annular fixing component (5) close to the speed gear (4); the plug-in lugs (51) are inserted into the speed gear (4) and fixedly connected to the speed gear (4).

3. A manual transmission synchronizing device according to claim 1, characterized in that: The main shaft (1) and the wheel hub (2), as well as the sleeve (3) and the wheel hub (2), are connected by splines.

4. A manual transmission synchronizing device according to claim 1, characterized in that: The synchronous connector (7) is a plate protruding in a semicircular shape toward one side of the sleeve (3).

5. A manual transmission synchronizing device according to claim 1, characterized in that: The synchronous plug-in hole (8) is an arc-shaped hole.

6. A manual transmission synchronizing device according to claim 1, characterized in that: The number of the synchronous plug connectors (7) is greater than the number of the synchronous plug holes (8).

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