CN204716961U - The auxiliary box cylinder assembly of a kind of high gear side band spring - Google Patents

Abstract

The utility model discloses an auxiliary box cylinder assembly with a spring on the high gear side, which includes a cylinder body. Inside the cylinder body, a shift fork shaft and a piston are connected by a hexagonal nylon ring locking thin nut, and the end of the cylinder body is fixed with a The auxiliary box shifts the cylinder head. The side wall of the cylinder block is provided with a locking structure that matches the shifting structure on the shift fork shaft. The inner wall of the high gear side of the cylinder block is provided with a ring-shaped In the groove, a spring is arranged in the annular groove, and the free height of the spring is greater than the depth of the annular groove. The utility model can avoid air leakage caused by the damage of the O-shaped sealing ring, and at the same time, it is beneficial to protect the synchronizer of the auxiliary box and the high-speed gear, and can largely reduce the occurrence of the carbon cloth shedding of the high-speed cone ring of the auxiliary box.

Description

An auxiliary box cylinder assembly with a spring on the high gear side

technical field

The utility model relates to an auxiliary box cylinder, in particular to an auxiliary box cylinder assembly with a spring on the high gear side.

Background technique

At present, the locking pin type single-cone synchronizer of the auxiliary box has the problem that the carbon fiber friction material of the high-speed cone ring is easy to fall off and wear. The gear speed difference is the sub-box speed ratio times of the low gear speed difference. Assuming that the sub-box speed ratio is 4, the low gear synchronous inertia is 16 times the high gear synchronous inertia, and the high gear speed difference is 4 times the low gear speed difference. The lock-pin type single-cone synchronizer of the auxiliary box has a low gear synchronization time that is 3 to 3.6 times that of a high gear synchronizer, and the average power per unit area of the high gear side is more than 5 times that of the low gear side. Because the conical surface of the friction ring of the high-speed synchronizer generates a lot of heat in a short period of time, the synchronization time is less than 0.1s, and the carbon fiber material is generally bonded to the surface of the powder metallurgy substrate by epoxy resin, so the heat generated in a short period of time A large amount of heat will cause the temperature of the cone surface to rise rapidly, and even cause the glue to lose its bonding performance, which will cause the carbon cloth to fall off.

Utility model content

The purpose of this utility model is to provide an auxiliary box cylinder assembly with a spring on the high gear side, so as to overcome the above-mentioned defects in the prior art. The box synchronizer and high-speed gear can also reduce the occurrence of the carbon cloth shedding of the high-speed cone ring of the auxiliary box to a large extent.

In order to achieve the above object, the utility model adopts the following technical solutions:

An auxiliary box cylinder assembly with a spring on the high gear side, including a cylinder block, inside the cylinder block, the shift fork shaft and the piston are connected by a hexagonal nylon ring locking thin nut, and the end of the cylinder block is fixed with an auxiliary box shift cylinder On the cover, the inner wall of the high gear side of the cylinder block is provided with an annular groove coaxial with the shift fork shaft, and a spring is arranged in the annular groove, and the free height of the spring is greater than the depth of the annular groove.

Further, the free height of the spring is: the distance between the bottom of the annular groove and the piston when in neutral.

Further, the shifting cylinder head of the auxiliary box is fixed on the end of the cylinder block through the assembly of hexagon head bolts and spring washers and the cylinder head gasket.

Further, the side wall of the cylinder block is provided with a locking structure that cooperates with the shifting structure on the shift fork shaft. The locking structure includes a screw plug inserted through the side wall of the cylinder block, a positioning spring set in the screw plug and A steel ball located at the end of a positioning spring.

Further, a first sealing ring, a second sealing ring and a third sealing ring are respectively provided between the fork shaft and the inner wall of the cylinder block, between the piston and the inner wall of the cylinder block, and between the fork shaft and the piston.

Further, the first sealing ring, the second sealing ring and the third sealing ring are all O-rings.

Further, a hexagon head screw plug is provided on the shift cylinder head of the auxiliary box, and a corrugated copper gasket is arranged between the hexagon head screw plug and the shift cylinder head of the auxiliary box.

Compared with the prior art, the utility model has the following beneficial technical effects:

When the utility model shifts from a low gear to a high gear, the piston drives the shift fork to move axially to the high gear side, and when the piston reaches the neutral position, it contacts the spring. At this time, the spring is gradually compressed and generates a certain compression force to slow down the shaft of the piston. At the same time, the resultant axial force of the sliding sleeve is reduced, thereby reducing the axial force on the locking surface of the synchronizer, which can properly prolong the synchronization time, reduce the power per unit area of the cone surface of the friction ring of the synchronizer, and thereby reduce the friction Reduces the risk of wear and shedding of the synchronizer friction material due to the heat generated by the surface. When the synchronization is completed, the piston further overcomes the resistance of the spring under the action of the air pressure and puts into the high gear, thereby avoiding the phenomenon that the temperature of the cone surface rises rapidly due to the rapid generation of frictional heat of the synchronizer cone ring when the high gear is engaged, and ensures the friction of the synchronizer. Material does not come off quickly when synchronizing.

At the same time, the utility model can reduce the impact of the piston on the cylinder wall, and avoid the O-ring damage caused by scratches on the surface of the shift fork shaft and the surface of the cylinder wall in contact with the shift fork shaft to cause air leakage. It can reduce the impact of the shift fork on the sliding sleeve and the impact of the sliding sleeve on the locking surface of the locking pin, and can also reduce the impact of the sliding sleeve on the spline teeth of the high-speed gear, which is beneficial to protect the auxiliary box synchronizer and the high-speed gear.

Description of drawings

Fig. 1 is the structural schematic diagram of existing auxiliary box cylinder assembly;

Fig. 2 is a two-dimensional schematic diagram of the overall structure of the utility model;

Fig. 3 is a front view of the cylinder block of the present utility model;

Fig. 4 is a side view of the cylinder block of the present utility model;

Fig. 5 is a sectional view of the cylinder block of the present utility model;

Fig. 6 is a spring schematic diagram of the present utility model;

Fig. 7 is a three-dimensional schematic diagram of the overall structure of the utility model.

Among them, 1. Cylinder block; 2. Piston; 3. Auxiliary box shift cylinder head; 4. Fork shaft; 5. First sealing ring; 6. Second sealing ring; 7. Third sealing ring; 8. Cylinder Cover gasket; 9. Hexagon head bolt and spring washer assembly; 10. Hexagon nylon ring lock thin nut; 11. Hexagon head screw plug; 12. Wrinkled copper washer; 13. Identification plate; 14. Positioning spring; 15. Screw plug; 16, steel ball; 17, spring.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Referring to Fig. 2 to Fig. 7, an auxiliary box cylinder assembly with a spring on the high gear side includes a cylinder block 1, inside the cylinder block 1, the shift fork shaft 4 and the piston 2 are connected by a hexagonal nylon ring locking thin nut 10, The end of the cylinder block 1 is fixed with the auxiliary box shifting cylinder head 3 through the hexagon head bolt and spring washer assembly 9 and the cylinder head gasket 8, and the auxiliary box shifting cylinder head 3 is provided with a hexagon head screw plug 11, a hexagon head A corrugated copper washer 12 is provided between the screw plug 11 and the shift cylinder head 3 of the auxiliary box, and the side wall of the cylinder block 1 is provided with a locking structure that cooperates with the shifting structure on the shift fork shaft 4 (for high There is still an air pressure cylinder in the rear high gear trachea, and the force of the spring 17 is small so that the shifting phenomenon will not occur, and there may be no locking structure). The positioning spring 14 located in the screw plug 15 and the steel ball 16 located at the end of the positioning spring 14, the inner wall of the high block side of the cylinder block 1 is provided with a circular groove coaxial with the shift fork shaft 4, and the circular ring A spring 17 is arranged in the circular groove, and the free height of the spring 17 is: when in neutral, the distance between the bottom of the annular groove and the piston 2, and the outer wall of the cylinder block 1 is also provided with information for displaying its model. Identification plate13.

Between the shift fork shaft 4 and the inner wall of the cylinder block 1, between the piston 2 and the inner wall of the cylinder block 1, and between the shift fork shaft 4 and the piston 2, a first sealing ring 5, a second sealing ring 6 and a third sealing ring are arranged respectively. The sealing ring 7, the first sealing ring 5, the second sealing ring 6 and the third sealing ring 7 are all O-rings.

The implementation process of the present utility model is described in further detail below:

The auxiliary box cylinder of the utility model adds a cylindrical helical spring on the basis of a common cylinder (as shown in Figure 1), and sets a circular groove on the side of the cylinder body close to the high gear, and the spring 17 is installed in the circular In the annular groove, and the spring 17 has a certain height, when the auxiliary box is switched from low gear to high gear, the air pressure will push the piston 2 to move to the high gear, and continue to move after passing through the neutral position, and the end surface of the piston 2 will touch the spring 17 , at this time, as the piston 2 moves, the compression amount of the spring 17 gradually increases to generate a certain axial force, which is opposite to the direction of the air pressure force.

Generally, the left side of the auxiliary box cylinder is the high gear. When shifting from low gear to high gear, the low gear side is connected to the air pipe of the auxiliary box shift cylinder head 3 for intake air, and the air pipe connected to the high gear side cylinder block 1 is exhausted. At this time, the piston 2 drives the shift fork shaft 4, and at the same time the shift fork shaft 4 drives the auxiliary box shift fork, and the auxiliary case shift fork drives the synchronizer to move to the high gear side. When the piston 2 reaches the neutral position, it contacts the spring 17. At this time The spring 17 is gradually compressed and generates a certain compression force to slow down the axial movement speed of the piston 2, and at the same time reduce the resultant axial force of the sliding sleeve, thereby reducing the axial force on the locking surface of the synchronizer, which can properly prolong the synchronization time and reduce the The power per unit area of the cone surface of the synchronizer friction ring reduces the heat generated by the friction surface and reduces the risk of wear and shedding of the synchronizer friction material. When the synchronization is completed, the piston 2 further overcomes the resistance of the spring 17 under the action of the air pressure and engages in a high gear, thereby avoiding the phenomenon that the frictional heat of the synchronizer cone ring is sharply generated when the high gear is engaged, and ensuring that the friction material of the synchronizer is stable during synchronization. Does not fall off quickly.

For the cylinder that still has air pressure in the high gear air pipe after the high gear is engaged, the force of the spring 17 is small and will not cause the occurrence of the gear drop phenomenon, and there may be no locking structure; Cylinder, the cylinder itself has a locking mechanism to prevent gear loss, and the spring force of this structure is also small, which will not cause gear loss. The spring 17 used in the utility model is easy to process, and the cylinder block can be used after being properly modified. The process is simple, so the manufacturing cost of the utility model is low.

The utility model can reduce the impact of the piston 2 on the cylinder wall, and avoid the O-ring damage caused by scratches on the surface of the shift fork shaft 4 and the surface of the cylinder wall in contact with the shift fork shaft 4, resulting in air leakage. It can also reduce the impact of the shift fork on the sliding sleeve and the impact of the sliding sleeve on the locking surface of the locking pin. To a large extent, it can also reduce the occurrence of the carbon cloth shedding of the high-block cone ring of the auxiliary box. When the air pressure is the same, the synchronous force of the high gear side can be reduced by increasing the spring, and the synchronous time of the high gear side can be slightly extended to reduce the difference of the synchronous time between the high gear and the low gear. Cloth shedding occurs.

Claims (7)

1. the auxiliary box cylinder assembly of a high gear side band spring, it is characterized in that, comprise cylinder block (1), inner in cylinder block (1), declutch shift shaft (4) is connected by hexagonal nylon ring locking thin nut (10) with piston (2), the end winding support of cylinder block (1) has odd-side shifting cylinder lid (3), the high gear side inwall of cylinder block (1) offers the circle shape groove coaxial with declutch shift shaft (4), arrange spring (17) in circle shape groove, the free height of spring (17) is greater than the degree of depth of circle shape groove.

2. the auxiliary box cylinder assembly of a kind of high gear side according to claim 1 band spring, it is characterized in that, the free height of spring (17) is: when being in neutral, the distance between the bottom of circle shape groove and piston (2).

3. the auxiliary box cylinder assembly of a kind of high gear side according to claim 1 band spring, it is characterized in that, odd-side shifting cylinder lid (3) is fixed on the end of cylinder block (1) by hexagon head bolt and spring washer assembly parts (9) and cylinder head gasket (8).

4. the auxiliary box cylinder assembly of a kind of high gear side according to claim 1 band spring, it is characterized in that, the sidewall of cylinder block (1) is provided with the stopper structure coordinated with the gear shifting structure on declutch shift shaft (4), stopper structure comprises the plug screw (15) interting and be arranged on cylinder block (1) sidewall, is located at the retaining spring (14) in plug screw (15) and is located at the steel ball (16) of retaining spring (14) end.

5. the auxiliary box cylinder assembly of a kind of high gear side according to claim 1 band spring, it is characterized in that, between the inwall of declutch shift shaft (4) and cylinder block (1), between piston (2) and the inwall of cylinder block (1) and between declutch shift shaft (4) and piston (2), be respectively equipped with the first seal ring (5), the second seal ring (6) and the 3rd seal ring (7).

6. the auxiliary box cylinder assembly of a kind of high gear side according to claim 5 band spring, is characterized in that, the first seal ring (5), the second seal ring (6) and the 3rd seal ring (7) are O RunddichtringO.

7. the auxiliary box cylinder assembly of a kind of high gear side according to claim 1 band spring, it is characterized in that, odd-side shifting cylinder lid (3) is provided with hexagon head plug screw (11), is provided with fold copper washer (12) between hexagon head plug screw (11) and odd-side shifting cylinder lid (3).