Gear shifting assembly

Abstract

The utility model relates to the field of pneumatics, in particular to a gear shifting assembly which is more stable when a piston assembly is more stable in the pressure relief process, namely when an automobile is in a neutral gear, the volume of a first air cavity is larger than that of a second air cavity, and the minimum flow area of a first working channel is larger than that of a second working channel. The control assembly can control the first working channel to communicate with the first air cavity and the external space of the gear shifting assembly, the control assembly can control the second working channel to communicate with the second air cavity and the external space of the gear shifting assembly, and when the piston rod is located at the second position, the pressure drop speed difference of the first air cavity and the second air cavity on the two sides of the piston head assembly can be reduced; therefore, in the pressure relief process, the piston assembly is more stable, that is, when an automobile is in a neutral gear, the piston assembly is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic field especially relates to a gear shifting assembly. BACKGROUND

[0002] In the pneumatic field, the gear shifting assembly includes an actuator and a control mechanism, the control mechanism controls the on-off of the gas circuit to realize the action of the actuator, thereby realizing the switching between different gears of the automobile.

[0003] In some technologies, the actuator is a cylinder, the two sides of the piston head are pressurized along the moving direction of the piston assembly, the pressure of the two sides of the piston head is increased, and under the action of the limiting structure of the piston head, the piston head is in a balanced state at a certain position, and the automobile is in neutral gear; after the automobile is in neutral gear, the gas cavities on both sides of the piston head need to be depressurized, and in the process of depressurization, the piston head will be unbalanced and the piston rod will be deflected, thereby making the gear unstable. SUMMARY

[0004] The utility model provides a gear shifting assembly which solves the above problems:

[0005] A gear shifting assembly, comprising an actuator and a control mechanism, the actuator comprising a cylinder body and a piston assembly, the actuator comprising a chamber, part of the piston assembly being located in the chamber, the piston assembly comprising a piston head assembly and a piston rod, part of the piston head assembly being connected to the piston rod, the chamber comprising a first gas cavity and a second gas cavity when the piston rod is located at a second position, at least part of the first gas cavity being located on one side of the piston head assembly, at least part of the second gas cavity being located on the other side of the piston head assembly, the volume of the first gas cavity being greater than the volume of the second gas cavity, the gear shifting assembly comprising a first working channel and a second working channel, the minimum flow area of the first working channel being greater than the minimum flow area of the second working channel; the control mechanism being capable of controlling the first working channel to conduct the first gas cavity and the external space of the gear shifting assembly, and the control mechanism being capable of controlling the second working channel to conduct the second gas cavity and the external space of the gear shifting assembly.

[0006] Such a gear shifting assembly, the volume of the first gas cavity being greater than the volume of the second gas cavity, the minimum flow area of the first working channel being greater than the minimum flow area of the second working channel; the control mechanism being capable of controlling the first working channel to conduct the first gas cavity and the external space of the gear shifting assembly, and the control mechanism being capable of controlling the second working channel to conduct the second gas cavity and the external space of the gear shifting assembly, the difference in the pressure drop speed of the first gas cavity and the second gas cavity on both sides of the piston head assembly being reduced when the piston rod is located at the second position, so that the piston assembly is more stable during the depressurization process. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 Figure 1 is a cross-sectional view of the gear shifting assembly when the piston rod is located at the second position;

[0008] Figure 2 Fig. 1 is a schematic view of a first embodiment of a hydraulic actuator according to the application, Figure 1 Fig. 2 is a schematic view of a first embodiment of a first valve according to the application, Fig. 3 is a schematic view of a first embodiment of a second valve according to the application,

[0009] Fig. 4 is a schematic view of a first embodiment of a first switching body according to the application, Figure 3 Fig. 5 is a schematic view of a first embodiment of a second switching body according to the application, Figure 1 Fig. 6 is a schematic view of a first embodiment of a first switching body according to the application, Fig. 7 is a schematic view of a first embodiment of a second switching body according to the application,

[0010] Fig. 8 is a schematic view of a first embodiment of a first valve according to the application, Figure 4 Fig. 9 is a schematic view of a first embodiment of a second valve according to the application, Figure 1 Fig. 10 is a schematic view of a first embodiment of a first switching body according to the application, Fig. 11 is a schematic view of a first embodiment of a second switching body according to the application,

[0011] Fig. 12 is a schematic view of a first embodiment of a first valve according to the application, Figure 5 Fig. 13 is a schematic view of a first embodiment of a second valve according to the application, Figure 1 Fig. 14 is a schematic view of a first embodiment of a first switching body according to the application, Fig. 15 is a schematic view of a first embodiment of a second switching body according to the application,

[0012] Fig. 16 is a schematic view of a first embodiment of a first valve according to the application, Figure 6 Fig. 17 is a schematic view of a first embodiment of a second valve according to the application, Figure 1 Fig. 18 is a schematic view of a first embodiment of a first switching body according to the application, Fig. 19 is a schematic view of a first embodiment of a second switching body according to the application,

[0013] Fig. 20 is a schematic view of a first embodiment of a first valve according to the application, Figure 7 Fig. 21 is a schematic view of a first embodiment of a second valve according to the application, Figure 1 Fig. 22 is a schematic view of a first embodiment of a first switching body according to the application, Fig. 23 is a schematic view of a first embodiment of a second switching body according to the application,

[0014] Fig. 24 is a schematic view of a first embodiment of a first valve according to the application, Figure 8 Fig. 25 is a schematic view of a first embodiment of a second valve according to the application, Figure 1 Fig. 26 is a schematic view of a first embodiment of a first switching body according to the application, Fig. 27 is a schematic view of a first embodiment of a second switching body according to the application,

[0015] Fig. 28 is a schematic view of a first embodiment of a first valve according to the application, Figure 9 Fig. 29 is a schematic view of a first embodiment of a second valve according to the application, Fig. 30 is a schematic view of a first embodiment of a first switching body according to the application,

[0016] Fig. 31 is a schematic view of a first embodiment of a second switching body according to the application, Figure 10 Fig. 32 is a schematic view of a first embodiment of a first valve according to the application, Fig. 33 is a schematic view of a first embodiment of a second valve according to the application,

[0017] Fig. 34 is a schematic view of a first embodiment of a first switching body according to the application, Figure 11 Fig. 35 is a schematic view of a first embodiment of a second switching body according to the application, Fig. 36 is a schematic view of a first embodiment of a first valve according to the application,

[0018] Fig. 37 is a schematic view of a first embodiment of a second valve according to the application, Figure 12 Fig. 38 is a schematic view of a first embodiment of a first switching body according to the application, Fig. 39 is a schematic view of a first embodiment of a second switching body according to the application,

[0019] Fig. 40 is a schematic view of a first embodiment of a first valve according to the application, Fig. 41 is a schematic view of a first embodiment of a second valve according to the application,

[0020] Fig. 42 is a schematic view of a first embodiment of a first switching body according to the application, Fig. 43 is a schematic view of a first embodiment of a second switching body according to the application,

[0021] Fig. 44 is a schematic view of a first embodiment of a first valve according to the application, Fig. 45 is a schematic view of a first embodiment of a second valve according to the application,

[0022] Fig. 46 is a schematic view of a first embodiment of a first switching body according to the application, Fig. 47 is a schematic view of a first embodiment of a second switching body according to the application,

[0023] Fig. 48 is a schematic view of a first embodiment of a first valve according to the application, Fig. 49 is a schematic view of a first embodiment of a second valve according to the application,

[0024] Fig. 50 is a schematic view of a first embodiment of a first switching body according to the application, Fig. 51 is a schematic view of a first embodiment of a second switching body according to the application,

[0025] First driving body 311, first switching body 312, first groove part 313, first body part 314, first side wall 315,

[0026] First opening and closing core 316, first switching core 317, first elastic body 318, first valve cavity 319;

[0027] Second driving body 321, second switching body 322, second groove part 323, first section 3231, second section 3232, second body part 324,

[0028] Second side wall 325, throttling section 326, second opening and closing core 327, second switching core 328, second elastic body 329,

[0029] Second valve cavity 330;

[0030] First working channel 01, second working channel 02

[0031] First channel 011, first part 0111, third part 0112;

[0032] Second channel 021, second part 0211, fourth part 0212;

[0033] First inlet channel 03, fourth port 031, second inlet channel 04, sixth port 041;

[0034] First exhaust channel 05, third port 051, second exhaust channel 06, fifth port 061, third section 062, fourth section 063;

[0035] Second throttling port 07. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be combined with the drawings and examples, and the utility model will be further described in detail. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0037] The technical scheme of the specific embodiment will be described below in combination with the drawings:

[0038] In the utility model, see Figures 1 to 5The shift assembly comprises an actuating assembly, the actuating assembly comprises a cylinder body 1 and a piston assembly 2, the actuating assembly comprises a chamber 100, at least part of the piston assembly 2 is located in the chamber 100, and the piston assembly 2 has a first position (not shown in the figure), a second position and a third position (not shown in the figure) in the moving direction of the piston assembly 2. Specifically, the piston rod 21 of the piston assembly 2 is located at the first position (not shown in the figure), the second position and the third position (not shown in the figure), which respectively correspond to different gear positions of the automobile, i.e. the first gear position, the second gear position and the third gear position. The first position and the third position are the limit positions of the piston rod 21 in the moving direction, and the second position is the intermediate gear position of the piston rod 21 in the moving direction. Specifically, the first gear position and the third gear position can be the forward gear position and the reverse gear position respectively, and the second gear position can be the neutral gear position of the automobile.

[0039] The cylinder body 1 comprises a first limiting portion 11, a second limiting portion 12 and a third limiting portion 13, and the piston assembly 2 comprises a piston head assembly 22, at least part of the piston head assembly 22 is limited or fixedly connected with the piston rod 21. In the moving direction of the piston assembly 2, the first limiting portion 11 and the third limiting portion 13 are respectively located on both sides of the piston head assembly 22. It is defined that when at least part of the piston head assembly 22 abuts against the first limiting portion 11, the piston rod 21 is in the first position, and specifically, the automobile is in the first gear position. When at least part of the piston head assembly 22 abuts against the third limiting portion 13, the piston rod 21 is in the third position, and specifically, the automobile is in the third gear position. Specifically, the piston head assembly 22 comprises a first piston head 221 and a second piston head 222, the first piston head 221 is sleeved on at least part of the second piston head 222, the piston rod 21 is limitedly connected or fixedly arranged with the second piston head 222, and when the third limiting portion 13 abuts against the second piston head 222, the piston rod 21 is in the third position, and more specifically, the automobile is in the third gear position. In the moving direction of the piston assembly 2, the second limiting portion 12 is located between the first limiting portion 11 and the second limiting portion 12, and more specifically, the second limiting portion 12 is a stepped portion. When the second limiting portion 12 abuts against the first piston head 221 and the first piston head 221 abuts against the second piston head 222 in the moving direction of the piston assembly 2, the piston rod 21 is in the second position, and specifically, the automobile is in the second gear position.

[0040] When the piston rod 21 is in the second position, the chamber 100 comprises a first gas cavity 001 and a second gas cavity 002, and along the moving direction of the piston assembly 2, at least part of the first gas cavity 001 and at least part of the second gas cavity 002 are respectively located on both sides of the piston head assembly 22, the volume of the first gas cavity 001 is greater than the volume of the second gas cavity 002; the shift assembly comprises a first working channel 01 and a second working channel 02, the minimum flow area of the first working channel 01 is greater than the minimum flow area of the second working channel 02, the shift assembly comprises a control assembly 3, the control assembly 3 can control the first working channel 01 to be in communication with the first gas cavity 001 and the external space of the shift assembly, and the control assembly 3 can control the second working channel 02 to be in communication with the second gas cavity 002 and the external space of the shift assembly.

[0041] Such a shift assembly, by the volume of the first gas cavity 001 being greater than the volume of the second gas cavity 002, the minimum flow area of the first working channel 01 being greater than the minimum flow area of the second working channel 02, that is, the flow of the first working channel 01 being greater than the flow of the second working channel 02; the control assembly 3 can control the first working channel 01 to be in communication with the first gas cavity 001 and the external space of the shift assembly, and the control assembly 3 can control the second working channel 02 to be in communication with the second gas cavity 002 and the external space of the shift assembly, when the piston rod 21 is in the second position, along the moving direction of the piston assembly 2, the difference in pressure drop speed of the first gas cavity 001 and the second gas cavity 002 on both sides of the piston head assembly 22 can be reduced, so that the piston assembly 2 is more stable during pressure relief, that is, the automobile is more stable when in neutral gear.

[0042] It is defined that, along the moving direction of the piston assembly 2, the moving direction of the piston rod 21 from the first position to the third position is the first direction (not shown in the figure), and vice versa is the second direction (not shown in the figure). When the piston rod 21 is in the second position, at least part of the first gas cavity 001 is located in the second direction of the piston head assembly 22 relative to the second gas cavity 002.

[0043] The shift assembly comprises a first intake passage 03, a second intake passage 04, a first passage 011, a second passage 021, a first exhaust passage 05 and a second exhaust passage 06, the first exhaust passage 05 and the second exhaust passage 06 are respectively communicated with a space outside the shift assembly, the first working passage 01 comprises the first passage 011 and the first exhaust passage 05, the second working passage 02 comprises the second passage 021 and the second exhaust passage 06, the first passage 011 and the second passage 021 are respectively communicated with the chamber 100, and the force of the gas entering the chamber 100 through the first passage 011 and the second passage 021 on the piston head assembly 22 is towards different directions along the piston assembly 2, the force of the gas entering the chamber 100 through the first passage 011 on the piston head assembly 22 is towards or approximately towards the first direction, and the force of the gas entering the chamber 100 through the second passage 021 on the piston head assembly 22 is towards or approximately towards the second direction.

[0044] The shift assembly comprises a control assembly 3, the control assembly 3 comprises a first valve 31 and a second valve 32, the first valve 31 can control one of the first intake passage 03 and the first exhaust passage 05 and the first passage 011 to be communicated, while the other one and the first passage 011 are disconnected; the second valve 32 can control one of the second intake passage 04 and the second exhaust passage 06 and the second passage 021 to be communicated, while the other one and the second passage 021 are disconnected.

[0045] The first valve 31 comprises a first valve cavity 319, and the first valve 31 further comprises a first driving body 311, a first switching body 312, a first elastic body 318 and a coil. At least part of the first driving body 311 and at least part of the first switching body 312 are located in the first valve cavity 319, and the first switching body 312 and the first driving body 311 are arranged along the moving direction of the first switching body 312. The first elastic body 318 can exert a force on the first switching body 312 along the moving direction of the first switching body 312 and towards the direction away from the first driving body 311. The first exhaust passage 05 is located in the first driving body 311. At least part of the first passage 011 is a gap between the wall part corresponding to the first valve cavity 319 of the side wall of at least part of the first switching body 312. At least part of the first passage 011 is located in the cylinder body 1. The first valve 31 comprises a first opening and closing core 316 and a first switching core 317, and the first opening and closing core 316 and the first switching core 317 are respectively arranged in position with the first switching body 312 along the moving direction of the first switching body 312. The first exhaust passage 05 has a third port 051, and the first opening and closing core 316 is closer to the third port 051 relative to the first switching core 317. The wall part corresponding to the third port 051 is arranged opposite to the first opening and closing core 316. The first intake passage 03 has a fourth port 031, and the first switching core 317 is closer to the fourth port 031 relative to the first opening and closing core 316 along the moving direction of the first switching body 312. The wall part corresponding to the first switching core 317 and the fourth port 031 is arranged opposite.

[0046] Specifically, the first driving body 311 can be a static iron core, the first switching body 312 can be a dynamic iron core, and the first elastic body 318 can be a spring. After the coil is powered on, the first driving body 311 has magnetism, the first driving body 311 attracts the first switching body 312, the first switching body 312 overcomes the force of the first elastic body 318, approaches the wall part corresponding to the third port 051, and is away from the wall part corresponding to the fourth port 031, until the first opening and closing core 316 and the wall part corresponding to the third port 051 abut, at which time the wall part corresponding to the first switching core 317 and the fourth port 031 is separated, realizing the conduction of the first intake passage 03 and the first passage 011, and the disconnection of the first passage 011 and the first exhaust passage 05. After the coil is powered off, the magnetism of the first driving body 311 disappears, the first switching body 312 is affected by the force of the first elastic body 318, and is away from the wall part corresponding to the third port 051 and approaches the wall part corresponding to the fourth port 031 along the moving direction of the first switching body 312, until the first switching core 317 and the wall part corresponding to the fourth port 031 abut, at which time the first opening and closing core 316 and the wall part corresponding to the third port 051 are separated, realizing the disconnection of the first intake passage 03 and the first passage 011, and the conduction of the first passage 011 and the first exhaust passage 05.

[0047] The second valve 32 comprises a second valve cavity 330, and further comprises a second driving body 321, a second switching body 322, a second elastic body 329 and a coil. At least part of the second driving body 321 and at least part of the second switching body 322 are located in the second valve cavity 330. The second switching body 322 and the second driving body 321 are arranged along the moving direction of the second switching body 322. The second elastic body 329 can exert a force on the second switching body 322 along the moving direction of the second switching body 322 and towards the direction away from the second driving body 321. The second exhaust passage 06 is located in the second driving body 321. At least part of the second passage 021 is a gap between the wall part corresponding to the second valve cavity 330 and the side wall of at least part of the second switching body 322. At least part of the second passage 021 is located in the cylinder body 1. The second valve 32 comprises a second opening and closing core 327 and a second switching core 328. The second opening and closing core 327 and the second switching core 328 are respectively arranged in position with the second switching body 322 along the moving direction of the second switching body 322. The second exhaust passage 06 has a fifth port 061. The second opening and closing core 327 is closer to the fifth port 061 relative to the second switching core 328. The wall part corresponding to the fifth port 061 is arranged opposite to the second opening and closing core 327. The second intake passage 04 has a sixth port 041. The second switching core 328 is closer to the sixth port 041 relative to the second opening and closing core 327 along the moving direction of the second switching body 322. The wall part corresponding to the second switching core 328 and the sixth port 041 are arranged opposite to each other.

[0048] Specifically, the second driving body 321 can be a static iron core, the second switching body 322 can be a dynamic iron core, and the second elastic body 329 can be a spring; after the coil is energized, the second driving body 321 has magnetism, the second driving body 321 attracts the second switching body 322, the second switching body 322 overcomes the force of the second elastic body 329, approaches the wall part corresponding to the fifth port 061, and is away from the wall part corresponding to the sixth port 041, until the second opening and closing core 327 and the wall part corresponding to the fifth port 061 abut, when the second opening and closing core 327 and the wall part corresponding to the fifth port 061 abut, the second switching core 328 and the wall part corresponding to the sixth port 041 are separated, realizing that the second air inlet channel 04 and the second channel 021 are conducted, and the second channel 021 and the second exhaust channel 06 are disconnected. After the coil is de-energized, the magnetism of the second driving body 321 disappears, the second switching body 322 is affected by the force of the second elastic body 329, in the moving direction of the second switching body 322, away from the wall part corresponding to the fifth port 061, and close to the wall part corresponding to the sixth port 041, until the second switching core 328 and the wall part corresponding to the sixth port 041 abut, when the second switching core 328 and the wall part corresponding to the sixth port 041 abut, the second opening and closing core 327 and the wall part corresponding to the fifth port 061 are separated, realizing that the second air inlet channel 04 and the second channel 021 are disconnected, and the second channel 021 and the second exhaust channel 06 are conducted.

[0049] The first valve 31 and the second valve 32 can be controlled separately, that is, the energization or de-energization of any winding in the first valve 31 and the second valve 32 is controlled separately.

[0050] When the first passage 011 and the first intake passage 03 are conducted, the first passage 011 and the first exhaust passage 05 are disconnected, the second passage 021 and the second intake passage 04 are disconnected, and the second passage 021 and the second exhaust passage 06 are conducted, the gas passes through the first intake passage 03, enters the chamber 100 through the first passage 011, acts on one side of the piston head assembly 22 along the moving direction, so that at least part of the piston head assembly 22 can move along the first direction, and the gas on the other side of the piston head assembly 22 along the moving direction is discharged through the second passage 021 and the exhaust passage; when the second passage 021 and the second intake passage 04 are conducted, the second passage 021 and the second exhaust passage 06 are disconnected, the first passage 011 and the first intake passage 03 are disconnected, and the first passage 011 and the first exhaust passage 05 are conducted, the gas passes through the second intake passage 04, enters the chamber 100 through the second passage 021, acts on one side of the piston head assembly 22 along the moving direction, so that the piston head assembly 22 can move along the second direction, and the gas on the other side of the piston head assembly 22 along the moving direction is discharged through the first passage 011 and the exhaust passage; when the piston rod 21 is located at the second position, specifically, after the gear is located at the second gear, the first passage 011 and the first intake passage 03 are disconnected, the first passage 011 and the first exhaust passage 05 are conducted, the second passage 021 and the second intake passage 04 are disconnected, the second passage 021 and the second exhaust passage 06 are conducted, and the gas in the first gas cavity 001 and the second gas cavity 002 is discharged.

[0051] In actual application, when the piston rod 21 is located at the second position, the gas in the first gas cavity 001 and the second gas cavity 002 is discharged, and the piston head assembly 22 is unbalanced, the piston rod 21 is deflected, and the gear is unstable.

[0052] In the first embodiment, with reference to Figures 1 to 8 , the first passage 011 includes a first part 0111 located in the cylinder body 1, the second passage 021 includes a second part 0211 located in the cylinder body 1, and the second working passage 02 includes a second throttle 07, and the flow area of the second throttle 07 is the minimum flow area of the second working passage 02.

[0053] The second part 0211 can be a through hole with the same diameter, which is simple in structure and convenient to process. That is, the second part 0211 is processed by drilling on the cylinder body 1 blank. The second throttle port 07 is located in the second part 0211. The size of the drill bit meets the size requirement of the second throttle port 07, and the processing precision is higher. In addition, the first throttle port can be located in the first part 0111. The first throttle port is processed by drilling. The size of the drill bit meets the size requirement of the first throttle port, and the size relationship between the first throttle port and the second throttle port 07 is more precise, thereby realizing more accurate flow control, making the automobile more stable in the neutral gear.

[0054] In addition, the embodiment can also make the piston rod 21 move back and forth between the first position and the third position, that is, the time of switching between the first gear and the third gear of the automobile is closer, and the consistency is higher.

[0055] For example, in the process of moving the piston rod 21 from the third position to the first position in the second direction, the second channel 021 and the second intake channel 04 are connected, the second channel 021 and the second exhaust channel 06 are disconnected, the first channel 011 and the first intake channel 03 are disconnected, the first channel 011 and the first exhaust channel 05 are connected, the gas flows into the chamber 100 through the second intake channel 04 and the second channel 021, and acts on the piston head assembly 22, pushes the piston assembly 2 to move in the second direction, until at least part of the piston head assembly 22 abuts against the first limiting portion 11, that is, the piston rod 21 moves to the first position, realizing the switching from the third gear to the first gear. In the process, the gas flowing into the chamber 100 flows through the second throttle port 07; in the process of moving the piston rod 21 from the first position to the third position in the first direction, the second channel 021 and the second intake channel 04 are disconnected, the second channel 021 and the second exhaust channel 06 are connected, the first channel 011 and the first intake channel 03 are connected, and the first channel 011 and the first exhaust channel 05 are disconnected. The gas flows into the chamber 100 through the first intake channel 03 and the first channel 011, and acts on the piston head assembly 22, pushes the piston assembly 2 to move in the first direction, until at least part of the piston head assembly 22 abuts against the third limiting portion 13, that is, the piston rod 21 is located in the third position, realizing the switching from the first gear to the third gear. In the process, the gas flowing out of the chamber 100 flows through the second throttle port 07, that is, in the process of switching between the first gear and the third gear, the gas flowing into and out of the chamber 100 flows through the second throttle port 07, that is, the flow is controlled through the second throttle port 07, which can reduce the difference in speed of switching between the first gear and the third gear. In actual application, it can make the speed of switching between the first gear and the third gear more close, and the consistency is stronger.

[0056] In the second embodiment, referring to Figures 1 to 6 , andFigures 9 to 11 The first passage 011 includes a third portion 0112 which is a gap between a side wall of the first switching body 312 and a wall portion of the first valve cavity 319 corresponding to each other, and the second passage 021 includes a fourth portion 0212 which is a gap between a side wall of the second switching body 322 and a wall portion of the second valve cavity 330 corresponding to each other, and the fourth portion 0212 has a minimum flow passage area which is the minimum flow passage area of the second working passage 02.

[0057] The first passage 011 includes a third portion 0112 which is a gap between a side wall of the first switching body 312 and a wall portion of the first valve cavity 319 corresponding to each other, and the second passage 021 includes a fourth portion 0212 which is a gap between a side wall of the second switching body 322 and a wall portion of the second valve cavity 330 corresponding to each other, and the fourth portion 0212 has a minimum flow passage area which is the minimum flow passage area of the second working passage 02.

[0058] The second passage 021 includes a fourth portion 0212 which is a gap between a side wall of the second switching body 322 and a wall portion of the second valve cavity 330 corresponding to each other, and the fourth portion 0212 has a minimum flow passage area which is the minimum flow passage area of the second working passage 02.

[0059] More specifically, the wall part corresponding to the first valve cavity 319 has a guiding effect on the first switching body 312, so the gap between the wall part corresponding to the first valve cavity 319 and the first side wall 315 cannot be too large. To meet the flow requirement of the first channel 011, the space corresponding to the first groove part 313 can increase the flow of the first channel 011. The wall part corresponding to the second valve cavity 330 has a guiding effect on the second switching body 322, so the gap between the wall part corresponding to the second valve cavity 330 and the second side wall 325 cannot be too large. To meet the flow requirement of the second channel 021, the space corresponding to the second groove part 323 can increase the flow of the second channel 021.

[0060] In some embodiments, the second groove part 323 can be a straight groove with the same groove width and the same groove depth in the extension direction thereof. The size of the space corresponding to the second groove part 323, i.e., the increase or decrease of the groove width and / or the groove depth, can control the flow size of the second channel 021.

[0061] In some embodiments, the second groove part 323 can include a first section 3231 and a second section 3232. The groove width of the first section 3231 is smaller than that of the second section 3232. In the moving direction of the second switching body 322, the length of the first section 3231 is smaller than that of the second section 3232. The groove depth of the first section 3231 is smaller than that of the second section 3232. In the moving direction of the second switching body 322, the length of the first section 3231 is smaller than that of the second section 3232. The side wall of the second switching body 322 includes a throttling section 326, which includes the wall part corresponding to the first section 3231 and at least part of the second side wall 325. The gap between the throttling section 326 and the wall part corresponding to the second valve cavity 330 corresponds to the minimum flow area of the fourth portion 0212, i.e., the size of the space corresponding to the first section 3231, i.e., the groove width and / or the groove depth, so that the flow of the fourth portion 0212 is increased or decreased. In addition, the minimum flow area of the fourth portion 0212 is small, so that the groove width and / or the groove depth of the first section 3231 are small, the length of the first section 3231 is smaller than that of the second section 3232, and the processing is facilitated.

[0062] In the third embodiment, referring to Figures 1 to 6 , and Figure 12 , the second throttling port 07 is located in the second exhaust channel 06. Specifically, the first exhaust channel 05 is located in the first driving body 311, the first exhaust channel 05 is located in the first driving body 311, the second throttling port 07 is located in the second exhaust channel 06, and the flow area of the second throttling port 07 is the minimum flow area of the second working channel 02.

[0063] The first exhaust passage 05 can be a through hole, and the second exhaust passage 06 can be a through hole; the second exhaust passage 06 comprises a third section 062 and a fourth section 063, the flow area of the third section 062 is smaller than that of the fourth section 063, the second throttle 07 is located in the third section 062, and the length of the third section 062 is smaller than that of the fourth section 063, facilitating the processing of the second exhaust passage 06.

[0064] Compared with the second embodiment and the third embodiment, the minimum flow area of the second working passage 02 corresponds to a flow port located in the cylinder body 1, that is, the port for throttling is located in the cylinder body 1, which facilitates the use of the same structure on the first valve 31 and the second valve 32, and improves the versatility of the first valve 31 cavity 319 and the second valve 32.

Claims

1. A shift assembly comprising an actuating assembly and a control assembly (3), the actuating assembly comprising a cylinder (1) and a piston assembly (2), the actuating assembly comprising a chamber (100), a part of the piston assembly (2) being located in the chamber (100), the piston assembly (2) comprising a piston head assembly (22) and a piston rod (21), a part of the piston head assembly (22) and the piston rod (21) being connected, characterized in that, When the piston rod (21) is in the second position, the chamber (100) comprises a first gas cavity (001) and a second gas cavity (002), at least part of the first gas cavity (001) is located on one side of the piston head assembly (22), at least part of the second gas cavity (002) is located on the other side of the piston head assembly (22), the volume of the first gas cavity (001) is greater than the volume of the second gas cavity (002), the shift assembly comprises a first working channel (01) and a second working channel (02), the minimum flow area of the first working channel (01) is greater than the minimum flow area of the second working channel (02); the control assembly (3) can control the first working channel (01) to be connected with the first gas cavity (001) and the external space of the shift assembly, and the control assembly (3) can control the second working channel (02) to be connected with the second gas cavity (002) and the external space of the shift assembly.

2. The shift assembly of claim 1, wherein, The first working channel (01) comprises a first channel (011) and a first exhaust channel (05), the second working channel (02) comprises a second channel (021) and a second exhaust channel (06), the first channel (011) is connected with the first gas cavity (001), the second channel (021) is connected with the second gas cavity (002), the control assembly (3) can control the first channel (011) and the first exhaust channel (05) to be connected, and the control assembly (3) can control the second channel (021) and the second exhaust channel (06) to be connected.

3. The shift assembly of claim 2, wherein, The second channel (021) comprises a second part (0211), the second part (0211) is located in the cylinder body (1), the second working channel (02) comprises a second throttle (07), the second throttle (07) is located in the second part (0211), and the flow area of the second throttle (07) is the minimum flow area of the second working channel (02).

4. The shift assembly of any one of claims 2 or 3, wherein, The control assembly (3) comprises a first valve (31) cavity and a second valve (32), the shift assembly comprises a first intake channel (03) and a second intake channel (04), the first valve (31) can control one of the first intake channel (03) and the first exhaust channel (05) and the first channel (011) to be connected, while the other one and the first channel (011) are disconnected; the second valve (32) can control one of the second intake channel (04) and the second exhaust channel (06) and the second channel (021) to be connected, while the other one and the second channel (021) are disconnected.

5. The shift assembly of claim 2, wherein, The control assembly (3) comprises a second valve (32), the second valve (32) comprises a second driving body (321) and a second switching body (322), the second valve (32) comprises a second valve cavity (330), at least part of the second driving body (321) and at least part of the second switching body (322) are located in the second valve cavity (330), the second switching body (322) can move along its moving direction to approach or away from the second driving body (321), the second channel (021) comprises a fourth part (0212), the fourth part (0212) is a gap between the side wall of the second switching body (322) and the corresponding wall part of the second valve cavity (330), the minimum flow area of the fourth part (0212) is the minimum flow area of the second working channel (02).

6. The shift assembly of claim 5, wherein, The second switching body (322) has a second body part (324) and a second groove part (323), the second body part (324) comprises a second side wall (325), the second side wall (325) extends along the moving direction of the second switching body (322), the second side wall (325) and the corresponding wall part of the second valve cavity (330) are oppositely arranged and have a gap, the second groove part (323) extends along the moving direction of the second switching body (322), and the second groove part (323) is recessed inward from the second side wall (325), the side wall of the second switching body (322) comprises the second side wall (325) and the corresponding wall of the second groove part (323).

7. The shift assembly of claim 6, wherein, The second groove part (323) comprises a first section (3231) and a second section (3232), the groove width of the first section (3231) is smaller than the groove width of the second section (3232), and the length of the first section (3231) is smaller than the length of the second section (3232) along the moving direction of the second switching body (322); and / or, the groove depth of the first section (3231) is smaller than the groove depth of the second section (3232), and the length of the first section (3231) is smaller than the length of the second section (3232) along the moving direction of the second switching body (322).

8. The shift assembly of claim 7, wherein, The side wall of the second switching body (322) comprises a throttling section (326), the throttling section (326) comprises the corresponding wall part of the first section (3231) and part of the second side wall (325), and the corresponding flow area of the gap between the throttling section (326) and the corresponding wall part of the second valve cavity (330) is the minimum flow area of the fourth part (0212).

9. The shift assembly of claim 2, wherein, The control assembly (3) comprises a second valve (32), the second valve (32) comprises a second driving body (321) and a second switching body (322), the second valve (32) comprises a second valve cavity (330), at least part of the second driving body (321) is located in the second valve cavity (330), the second exhaust passage (06) is located in the second driving body (321), the second working passage (02) comprises a second throttling port (07), the second throttling port (07) is located in the second exhaust passage (06), and a flow area of the second throttling port (07) is the minimum flow area of the second working passage (02).

10. The shift assembly of claim 9, wherein, The second exhaust passage (06) is a through hole, and the second exhaust passage (06) comprises a third section (062) and a fourth section (063), a flow area of the third section (062) is smaller than that of the fourth section (063), the second throttling port (07) is located in the third section (062), and a length of the third section (062) is smaller than that of the fourth section (063).

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