Integrated AMT gear shifting air cylinder assembly

Abstract

The integrated AMT gear shifting air cylinder assembly comprises a shell, a piston sleeve is arranged in the shell, a shifting fork shaft is fixedly arranged in the piston sleeve, a gear shifting fork is arranged at the axial rear end of the shifting fork shaft in a sleeved mode, and a wave-shaped self-locking groove is formed in the outer wall of the top of the gear shifting fork; a front end cover is arranged at the axial front end of the shell, and the shell, the front end cover, the piston sleeve and the shifting fork shaft form a first air chamber. A rear end cover is arranged at the axial rear end of the shell; the shifting fork shaft and the piston shaft are integrally designed to be the shifting fork shaft, the shifting fork and the shifting fork shaft are integrally arranged in the shifting air cylinder assembly, the overall integration degree is high, the number of parts and part connection are reduced, the shifting rigidity is good, and the working reliability is higher. Meanwhile, the number of parts is reduced, the assembly process of the transmission is optimized, the weight and the cost are reduced, and the technical problems that an existing gear shifting mechanism is scattered in part arrangement, complex in assembly process and poor in gear shifting rigidity are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of gearbox selects gear shifting, specifically is a integrated AMT gear shift cylinder assembly. BACKGROUND

[0002] The electric control pneumatic AMT generally controls gear shift cylinder through solenoid valve to complete transmission gear shifting action, and is provided with cylinder assembly, piston shaft, displacement sensor and control system for controlling piston shaft movement in gear shifting actuator. UTILITY MODEL CONTENTS

[0003] In view of the deficiencies of prior art, the utility model aims at providing an integrated AMT gear shift cylinder assembly to solve the technical problems of existing gear shifting mechanism part arrangement dispersion, complex assembly process and poor gear shifting rigidity.

[0004] In order to solve the above technical problem, the utility model adopts the following technical scheme to realize:

[0005] An integrated AMT gear shift cylinder assembly, comprising a shell, a piston sleeve is arranged in the shell, a shift fork shaft is fixedly arranged in the piston sleeve, a gear shift fork is sleeved on the axial rear end of the shift fork shaft, and a wave-shaped self-locking groove is arranged on the top outer wall of the gear shift fork.

[0006] The axial front end of the shell is provided with a front end cover, and the shell, the front end cover, the piston sleeve and the shift fork shaft form a first air chamber. The axial rear end of the shell is provided with a rear end cover, and the shell, the rear end cover, the piston sleeve and the shift fork shaft form a second air chamber. First air inlet, displacement sensor window and second air inlet are sequentially arranged on the shell in the axial direction, the first air inlet is communicated with the first air chamber, the displacement sensor window is provided with a displacement sensor, and the second air inlet is communicated with the second air chamber.

[0007] The axial rear end of the rear end cover is provided with a self-locking top pin mounting hole, a self-locking top pin is arranged in the self-locking top pin mounting hole, a self-locking spring is arranged in the top blind hole of the self-locking top pin, and the bottom of the self-locking top pin is arranged in the wave-shaped self-locking groove.

[0008] The axial front end and the axial rear end of the piston sleeve are respectively provided with a cylinder piston, one end of the outer wall of the cylinder piston is in contact with the piston sleeve, the other end of the outer wall of the cylinder piston is in contact with the inner wall of the shell, and a sensing block is arranged on the outer wall of the piston sleeve.

[0009] The utility model discloses a following technical features:

[0010] The wear -resisting bushing is arranged between the shift fork shaft and the front end cover and the rear end cover.

[0011] The cylinder end cover oil seal is arranged between the shift fork shaft and the front end cover and the rear end cover, the end cover sealing ring is arranged between the shell and the front end cover and the rear end cover, the first sealing ring is arranged between the cylinder piston and the piston sleeve, the second sealing ring is arranged between the cylinder piston and the shell, and the shift fork shaft sealing ring is arranged between the shift fork shaft and the piston sleeve.

[0012] Two cylinder pistons are provided with stepped holes at the contact with the shell.

[0013] The shift fork shaft, the piston sleeve and the shift fork are fixedly connected through the elastic cylindrical pin respectively.

[0014] The shell is connected with the front end cover and the rear end cover through bolts.

[0015] Compared with the prior art, the utility model has the beneficial technical effects that:

[0016] (I) in the utility model, the shift fork shaft and the piston shaft are integrally designed as the shift fork shaft, the shift fork and the shift fork shaft are arranged in the shift cylinder assembly, the overall integration degree is high, the number of parts and the part connection are reduced, the shift rigidity is good, and the working reliability is higher.Simultaneously, the reduction of the number of parts optimizes the assembly process of the transmission, also brings the reduction of weight and cost, solves the technical problems of the dispersed part arrangement of the existing shift mechanism, the complex assembly process and the poor shift rigidity.

[0017] (II) in the utility model, the self-locking pin installation hole of the self-locking pin and the self-locking spring is an open cavity, the lubricating oil gas in the transmission can enter the self-locking pin installation hole, can guarantee that the self-locking pin and the self-locking spring do not produce the jam when moving in the self-locking pin installation hole in the shift process, improves the shift reliability.

[0018] (III) in the utility model, two cylinder pistons and the first sealing ring and the second sealing ring are same respectively, the sealing ring, the oil seal and the wear -resisting bushing on the front end cover and the rear end cover are same respectively, greatly save the production and management cost, in addition, through the wear -resisting bushing, effectively avoid the inner hole wear of the front end cover and the rear end cover and the shift fork shaft when having relative motion, affect the support and the stable operation of the shift fork shaft, improve the working reliability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the sectional view of the shift cylinder in the utility model and is located in the middle position;

[0020] Figure 2 is a sectional view of the gear shift cylinder in the first position in the utility model;

[0021] Figure 3 is a sectional view of the gear shift cylinder in the second position in the utility model;

[0022] Figure 4 is a three-dimensional structure schematic view of the gear shift fork in the utility model;

[0023] Figure 5 is a three-dimensional structure schematic view of the rear end cover in the utility model.

[0024] The meanings of the various reference numerals in the drawings are as follows: 1 - housing, 2 - cylinder piston, 3 - first sealing ring, 4 - second sealing ring, 5 - fork shaft, 6 - front end cover, 7 - wear-resistant bushing, 8 - cylinder end cover oil seal, 9 - piston sleeve, 10 - rear end cover, 11 - self-locking top pin, 12 - self-locking spring, 13 - gear shift fork, 14 - elastic cylindrical pin, 15 - fork shaft sealing ring, 16 - first air inlet hole, 17 - second air inlet hole, 18 - end cover sealing ring, 19 - displacement sensor window, 20 - self-locking groove, 21 - self-locking top pin mounting hole, 22 - first air chamber, 23 - second air chamber, 91 - sensing block.

[0025] The specific content of the utility model is further explained and described in detail below in combination with embodiments. DETAILED DESCRIPTION

[0026] It should be noted that all the components in the utility model, in the absence of special instructions, adopt the components known in the art.

[0027] The following gives a specific embodiment of the utility model, it should be noted that the utility model is not limited to the following specific embodiments, any equivalent transformation made on the basis of the technical solutions of the present application falls within the scope of protection of the utility model.

[0028] The utility model gives an integrated AMT gear shift cylinder assembly, including the housing 1, the housing 1 is provided with the piston sleeve 9, the piston sleeve 9 is fixedly provided with the fork shaft 5 in, the axial rear end of the fork shaft 5 is equipped with the gear shift fork 13, the gear shift fork 13 top outer wall is provided with the wave-shaped self-locking groove 20;

[0029] The axial front end of the shell 1 is provided with a front end cover 6, and the shell 1, the front end cover 6, the piston sleeve 9 and the shift fork shaft 5 form a first air chamber 22; the axial rear end of the shell 1 is provided with a rear end cover 10, and the shell 1, the rear end cover 10, the piston sleeve 9 and the shift fork shaft 5 form a second air chamber 23; the shell 1 is sequentially provided with a first air inlet hole 16, a displacement sensor window 19 and a second air inlet hole 17 in the axial direction, the first air inlet hole 16 is communicated with the first air chamber 22; the displacement sensor window 19 is provided with a displacement sensor; the second air inlet hole 17 is communicated with the second air chamber 23;

[0030] The axial rear end of the rear end cover 10 is provided with a self-locking top pin mounting hole 21, the self-locking top pin mounting hole 21 is provided with a self-locking top pin 11, the top blind hole of the self-locking top pin 11 is provided with a self-locking spring 12, and the bottom of the self-locking top pin 11 is arranged in the wave-shaped self-locking groove 20.

[0031] The axial front end and the axial rear end of the piston sleeve 9 are respectively provided with a cylinder piston 2, one end of the outer wall of the cylinder piston 2 is in contact with the piston sleeve 9, and the other end of the outer wall of the cylinder piston 2 is in contact with the inner wall of the shell 1; the outer wall of the piston sleeve 9 is provided with a sensing block 91.

[0032] In the above technical scheme, the shell 1 is provided with a cylinder first air inlet hole 16 and a second air inlet hole 17 and a displacement sensor window 19 in the middle of the cylinder. In the operation process of the piston, when one of the air inlet holes drives the piston to move, the other air inlet hole and the displacement sensor window 19 become the exhaust passage of the cylinder.

[0033] The piston sleeve 9 is provided with a sensing block 91 of the displacement sensor, and the displacement sensor arranged at the sensor window 19 obtains the gear engagement position of the transmission through the position of the sensing block 91 in the cylinder.

[0034] The shift fork shaft and the piston shaft are designed as a shift fork shaft in an integrated manner, the shift fork and the shift fork shaft are arranged in the shift cylinder assembly in an integrated manner, the overall integration degree is high, the number of parts is reduced, and the connection between parts is reduced, the shift rigidity is good, and the working reliability is higher. At the same time, the reduction of the number of parts optimizes the assembly process of the transmission, and also brings the reduction of weight and cost, solves the technical problems of the existing shift mechanism, such as dispersed part arrangement, complex assembly process and poor shift rigidity.

[0035] The self-locking top pin mounting hole 21 of the self-locking top pin and the self-locking spring is an open cavity, lubricating oil gas in the transmission can enter the self-locking top pin mounting hole 21, and the self-locking top pin 11 and the self-locking spring 12 can be prevented from being stuck when moving in the self-locking top pin mounting hole 21 in the shift process of the shift fork 13, and the shift reliability is improved.

[0036] The scheme is a three-position shift cylinder assembly, wherein, Figure 1The shift cylinder is in the intermediate position, the piston sleeve is in the intermediate position of the cylinder, the self-locking top pin 11 is opposite the middle of the shift yoke wave-shaped self-locking groove 20, and the shift yoke 13 is in the neutral position.

[0037] When the transmission TCU opens the air inlet channel of the first air inlet hole 16 of the cylinder, the first air chamber 22 is filled with air, the air pressure drives the piston sleeve 9 to move the shift yoke shaft 5, the shift yoke 13 and the cylinder piston 2 in the second air chamber 23 together to the rear side of the shaft by a set shift distance, the self-locking top pin 11 in the rear end cover 10 is pushed by the wave-shaped self-locking groove 20 on the shift yoke 13, and slides out of the middle recess of the wave-shaped self-locking groove 20, the shift yoke 13 is engaged in the preset gear position, the cylinder shift action is completed, and enters the first position as shown. Figure 2

[0038] When the transmission TCU opens the air inlet channel of the second air inlet hole 17 of the cylinder, the second air chamber 23 is filled with air, the air pressure drives the piston sleeve 9 to move the shift yoke shaft 5, the shift yoke 13 and the cylinder piston 2 in the first air chamber 22 together to the front side of the shaft by a set shift distance, the self-locking top pin 11 in the rear end cover 10 is pushed by the wave-shaped self-locking groove 20 on the shift yoke 13, and slides out of the middle recess of the wave-shaped self-locking groove 20, the shift yoke 13 is engaged in the preset gear position, the cylinder shift action is completed, and enters the second position as shown. Figure 3

[0039] When the transmission TCU simultaneously opens the air inlet channels of the first air inlet hole 166 and the second air inlet hole 17 of the cylinder, the first air chamber 22 and the second air chamber 23 are simultaneously filled with air, the piston sleeve 9 and the cylinder piston 2 return to the intermediate position as shown. Figure 1

[0040] The shift yoke shaft 5 is provided with wear-resistant bushings 7 between the front end cover 6 and the rear end cover 10.

[0041] In the above technical solution, the wear of the shift yoke shaft 5, the front end cover 6 and the rear end cover 10 is avoided, the service life and reliability are prolonged.

[0042] The shift yoke shaft 5 is provided with cylinder end cover oil seals 8 between the front end cover 6 and the rear end cover 10; the housing 1 is provided with end cover sealing rings 18 between the front end cover 6 and the rear end cover 10; the cylinder piston 2 is provided with a first sealing ring 3 between the piston sleeve 9; the cylinder piston 2 is provided with a second sealing ring 4 between the housing 1; and the shift yoke shaft 5 is provided with a shift yoke shaft sealing ring 15 between the piston sleeve 9.

[0043] In the above technical solution, the sealing ring is preferably an O-shaped sealing ring, and the cylinder end cover oil seals 8 and the various sealing rings ensure the sealing of the first air chamber 22 and the second air chamber 23.

[0044] ​​​The step hole is arranged at the contact position between the two cylinder pistons 2 and the shell 1.

[0045] In the technical scheme, the step hole is arranged to axially limit the cylinder piston 2.

[0046] The shift fork shaft 5 is fixedly connected with the piston sleeve 9 and the shift fork 13 through the elastic cylindrical pin 14.

[0047] In the technical scheme, the elastic cylindrical pin 14 is arranged to connect the shift fork shaft 5 with the piston sleeve 9 and the shift fork shaft 5 with the shift fork 13, so that the installation and dismounting are facilitated.

[0048] The shell 1 is bolted with the front end cover 6 and the rear end cover 10. In the technical scheme, the bolt connection facilitates the installation and dismounting.

Claims

1. An integrated AMT shift cylinder assembly comprising a housing (1), characterized in that, The shell (1) is provided with a piston sleeve (9), the piston sleeve (9) is fixedly provided with a shift fork shaft (5) inside, the axial rear end of the shift fork shaft (5) is sleeved with a shift fork (13), and the top outer wall of the shift fork (13) is provided with a wave-shaped self-locking groove (20). The axial front end of the shell (1) is provided with a front end cover (6), the shell (1), the front end cover (6), the piston sleeve (9) and the shift fork shaft (5) form a first air chamber (22), the axial rear end of the shell (1) is provided with a rear end cover (10), the shell (1), the rear end cover (10), the piston sleeve (9) and the shift fork shaft (5) form a second air chamber (23), the shell (1) is sequentially provided with a first air inlet hole (16), a displacement sensor window (19) and a second air inlet hole (17) along the axial direction, the first air inlet hole (16) is communicated with the first air chamber (22), the displacement sensor window (19) is provided with a displacement sensor, and the second air inlet hole (17) is communicated with the second air chamber (23). The axial rear end of the rear end cover (10) is provided with a self-locking top pin mounting hole (21), the self-locking top pin mounting hole (21) is provided with a self-locking top pin (11), the top blind hole of the self-locking top pin (11) is provided with a self-locking spring (12), and the bottom of the self-locking top pin (11) is arranged in the wave-shaped self-locking groove (20). The axial front end and the axial rear end of the piston sleeve (9) are respectively provided with one gas cylinder piston (2), one end of the outer wall of the gas cylinder piston (2) is in contact with the piston sleeve (9), the other end of the outer wall of the gas cylinder piston (2) is in contact with the inner wall of the shell (1), and the outer wall of the piston sleeve (9) is provided with a sensing block (91).

2. The integrated AMT shift cylinder assembly of claim 1, wherein, The shift fork shaft (5) is provided with a wear-resistant bushing (7) between the front end cover (6) and the rear end cover (10).

3. The integrated AMT shift cylinder assembly of claim 1, wherein, The shift fork shaft (5) is provided with a cylinder end cover oil seal (8) between the front end cover (6) and the rear end cover (10), the shell (1) is provided with an end cover sealing ring (18) between the front end cover (6) and the rear end cover (10), the gas cylinder piston (2) is provided with a first sealing ring (3) between the piston sleeve (9), the gas cylinder piston (2) is provided with a second sealing ring (4) between the shell (1), and the shift fork shaft (5) is provided with a shift fork shaft sealing ring (15) between the piston sleeve (9).

4. The integrated AMT shift cylinder assembly of claim 1, wherein, Two gas cylinder pistons (2) are provided with stepped holes at the contact positions of the shell (1).

5. The integrated AMT shift cylinder assembly of claim 1, wherein, The shift fork shaft (5), the piston sleeve (9) and the shift fork (13) are fixedly connected through elastic cylindrical pins (14) respectively.

6. The integrated AMT shift cylinder assembly of claim 1, wherein, The shell (1) is connected with the front end cover (6) and the rear end cover (10) through bolts.

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