CN219317585U - Pneumatic gear shifting mechanism of gearbox - Google Patents
Pneumatic gear shifting mechanism of gearbox Download PDFInfo
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- CN219317585U CN219317585U CN202320206750.9U CN202320206750U CN219317585U CN 219317585 U CN219317585 U CN 219317585U CN 202320206750 U CN202320206750 U CN 202320206750U CN 219317585 U CN219317585 U CN 219317585U
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- 230000007246 mechanism Effects 0.000 title claims abstract description 94
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 230000001105 regulatory effect Effects 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000007935 neutral effect Effects 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 13
- 230000000903 blocking effect Effects 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 230000010354 integration Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/17—Characterised by the construction of the motor unit of the straight-cylinder type of differential-piston type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The utility model provides a pneumatic gear shifting mechanism of a gearbox, which comprises the following components: the transmission rear cover shell, the gear shifting executing mechanism, the pressure regulating valve and the shifting fork are both arranged on the transmission rear cover shell, the shifting fork is arranged on the gear shifting executing mechanism, during operation, gear adjustment is carried out among neutral gear, high gear or low gear through the gear shifting executing mechanism, and in the process of gear adjustment, compressed air can generate at least two paths of working air pressure after passing through the pressure regulating valve. The utility model adopts a mode that the pressure regulating valve inputs stable high-pressure and low-pressure air flow to the gear shifting executing mechanism, thereby improving the stability of the pneumatic gear shifting mechanism; the self-locking mechanism is arranged to help prevent gear disengagement; meanwhile, the structure of the pneumatic gear shifting mechanism of the gearbox is more compact and high in integration level, the arrangement space is simplified, the use requirement of light weight is met, and the cost is further reduced.
Description
Technical Field
The application relates to the technical field of pneumatic gear shifting of gearboxes, in particular to a pneumatic gear shifting mechanism of a gearbox.
Background
The pneumatic gear shifting mechanism is an actuating gear shifting mechanism applied to a commercial vehicle gearbox, and has the advantages of large thrust, light operation and the like.
In the prior art, a pneumatic gear shifting mechanism based on the modification of a traditional fuel power AMT (automatic transmission with electronic control), which is mainly applicable to multi-gear shifting, has the following defects: firstly, in the gear shifting process, pneumatic media are extremely easy to generate violent impact, so that the problem of unstable air source of a gear shifting mechanism is caused; secondly, the existing two-gear speed-change pneumatic gear shifting mechanism is easy to take off gear when vibrating or receiving instantaneous impact force; third, the existing gearbox gear shifting mechanism is complex in structure, the arrangement space of the gear shifting mechanism and the air pipe pipeline is not compact, and the integration level of the gear shifting mechanism and the gearbox is low.
Disclosure of Invention
To above-mentioned problem, this application discloses pneumatic gearshift of gearbox to reach the technical effect that improves gearshift stability, prevent to take off keeps off, simple structure and integrated level are high, with low costs.
To achieve the above object, the present application provides a transmission pneumatic gear shift mechanism, including: the transmission rear cover shell, the gear shifting executing mechanism, the pressure regulating valve and the shifting fork are both arranged on the transmission rear cover shell, the shifting fork is arranged on the gear shifting executing mechanism,
during operation, gear adjustment is performed among neutral gear, high gear or low gear through the gear shifting executing mechanism, and in the gear adjustment process, compressed air can generate at least two paths of working air pressure after passing through the pressure regulating valve.
Further, the gear shifting actuating mechanism comprises a cylinder body, a first piston, a second piston positioned at the left side of the first piston and a piston rod,
the first piston and the second piston are assembled in the cylinder body in a sliding way, the interior of the cylinder body is divided into a first chamber, a second chamber and a third chamber from left to right by the first piston and the second piston in sequence,
one end of the piston rod can penetrate through the cylinder body, is fixedly connected with the first piston and the second piston respectively, the other end of the piston rod is connected with the shifting fork, and meanwhile, the piston rod can drive the shifting fork to move left and right along the axial direction so as to shift gears.
Further, a high-pressure single-linkage electromagnetic valve and a low-pressure double-linkage electromagnetic valve are arranged on the cylinder body of the gear shifting executing mechanism,
the low-pressure duplex electromagnetic valve is respectively provided with a first valve port communicated with the first chamber and a second valve port communicated with the second chamber,
and a third valve port communicated with the third chamber is arranged on the high-pressure single-connected electromagnetic valve.
Further, the pressure regulating valve is provided with an air inlet, a high-pressure air outlet and a low-pressure air outlet,
the air inlet of the pressure regulating valve is connected with a compressed air pipeline, the high-pressure air outlet of the pressure regulating valve is connected with the high-pressure single-connection electromagnetic valve through a high-pressure air pipe, and the low-pressure air outlet of the pressure regulating valve is connected with the low-pressure double-connection electromagnetic valve through a low-pressure air pipe.
Further, a plurality of equidistant limit grooves are formed in one end of the left side of the piston rod, which is exposed out of the cylinder body.
Further, the gearbox pneumatic gear shifting mechanism further comprises: the self-locking mechanism is arranged on the rear cover shell of the speed changer.
Further, a spacer structure for limiting is further arranged between the first piston and the second piston.
Further, the shift actuator further includes a front cover and a rear cover, which are respectively installed at left and right sides of the cylinder body.
Further, a left limiting end face for blocking the second piston from moving leftwards is arranged at the joint of the front cover and the cylinder body, and a right limiting end face for blocking the first piston from moving rightwards is arranged at the joint of the rear cover and the cylinder body.
Further, the gear shifting executing mechanism comprises a magnetic ring, the magnetic ring is installed at the right end part of the piston rod, and a position sensor for sensing the position of the magnetic ring is arranged on the rear cover of the gear shifting executing mechanism.
The application has the advantages that: provided is a transmission pneumatic gear shifting mechanism, comprising: the automatic transmission comprises a transmission rear cover shell, a gear shifting executing mechanism, a pressure regulating valve and a shifting fork, wherein the gear shifting executing mechanism and the pressure regulating valve are both arranged on the transmission rear cover shell, and the shifting fork is arranged on the gear shifting executing mechanism; during operation, gear adjustment is performed among neutral gear, high gear or low gear through the gear shifting executing mechanism, and in the gear adjustment process, at least two paths of working air pressures are generated by the pressure regulating valve, stable high-pressure air flow and stable low-pressure air flow can be input to the gear shifting executing mechanism, so that the stability of the pneumatic gear shifting mechanism is improved; the mechanical self-locking function at different gears is realized by arranging the self-locking mechanism, which is helpful for preventing gear disengagement; meanwhile, the structure of the actuating cylinder is simplified, so that the pneumatic gear shifting mechanism is more compact in arrangement, simple in structure and high in integration level, and the light-weight requirement is met, and the manufacturing and using cost is reduced.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic structural view of a transmission pneumatic shift mechanism in one embodiment of the present application;
FIG. 2 is a schematic installation view of a pneumatic gear shifting mechanism of a transmission in one embodiment of the present application;
FIG. 3 is a front cross-sectional view of a transmission pneumatic shift mechanism in a neutral state in one embodiment of the present application;
FIG. 4 is a reverse cross-sectional view of a transmission pneumatic shift mechanism (including a low pressure dual solenoid valve) in one embodiment of the present application;
FIG. 5 is a front cross-sectional view of a transmission pneumatic shift mechanism in an embodiment of the present application in a high gear state;
FIG. 6 is a front cross-sectional view of a transmission pneumatic shift mechanism in an engaged state in one embodiment of the present application.
In the figure: 1. the gear shifting executing mechanism comprises: 11-front cover, 12-cylinder body, 13-rear cover, 14-high pressure single-connected electromagnetic valve, 15-low pressure double-connected electromagnetic valve, 16-first piston, 17-second piston, 18-piston rod and 19-magnetic ring; 2. a pressure regulating valve; 3. a shifting fork; 4. self-locking mechanism: 41-springs and 42-steel balls; 5. a position sensor; 6. a high pressure gas pipe; 7. a low pressure gas pipe; 121. a first chamber; 122. a second chamber; 123. and a third chamber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
As shown in connection with fig. 1 and 2, in one embodiment of the present application, a transmission pneumatic shift mechanism is provided, comprising: the transmission rear cover shell (not marked in the figure), the gear shifting executing mechanism 1, the pressure regulating valve 2 and the shifting fork 3, wherein the gear shifting executing mechanism 1 and the pressure regulating valve 2 are both installed on the transmission rear cover shell, the shifting fork 3 is installed on the gear shifting executing mechanism 1, in the embodiment, the shifting fork 3 can be installed on a piston rod of the gear shifting executing mechanism 1, when the pneumatic gear shifting mechanism of the transmission works, gear adjustment is carried out among neutral gear, high gear or low gear through the gear shifting executing mechanism 1, and in the process of the gear adjustment, compressed air can generate at least two paths of working air pressure after passing through the pressure regulating valve 2.
Further, in the embodiment of the present application, as shown in fig. 3, the shift actuator includes a cylinder 12, a first piston 16, a second piston 17 located on the left side of the first piston 16, and a piston rod 18, the first piston 16 and the second piston 17 are slidably fitted inside the cylinder 12, and the inside of the cylinder 12 is divided into a first chamber 121, a second chamber 122, and a third chamber 123 in this order from left to right by the first piston 16 and the second piston 17. For example, the second piston 17 in fig. 3 divides the cylinder interior space into a first chamber 121 and a second chamber 122, and the right side of the first piston 16 is a third chamber 123.
One end of the piston rod 18 can penetrate through the cylinder 12 and is fixedly connected with the first piston 16 and the second piston 17, the other end of the piston rod 18 is connected with the shifting fork 3, and meanwhile, the piston rod 18 can drive the shifting fork 3 to move left and right along the axial direction to shift gears. It will be appreciated that the fork 3 can be connected to a gear sleeve and drive the sleeve into engagement with a transmission gear, thereby effecting a gear shift.
Fig. 3 and 4 show cross-sectional views of the gear shifting mechanism in two different directions, as shown in fig. 3 and 4, a high-pressure single-linkage electromagnetic valve 14 and a low-pressure double-linkage electromagnetic valve 15 are mounted on the cylinder 12 of the gear shifting actuator 1, a first valve port communicated with the first chamber 121 and a second valve port communicated with the second chamber 122 are respectively arranged on the low-pressure double-linkage electromagnetic valve 15, and a third valve port communicated with the third chamber 123 is arranged on the high-pressure single-linkage electromagnetic valve 14.
Further, the pressure regulating valve 2 is provided with an air inlet, a high-pressure air outlet and a low-pressure air outlet, the air inlet of the pressure regulating valve 2 is connected with a compressed air pipeline of a vehicle, the high-pressure air outlet of the pressure regulating valve 2 is connected with the high-pressure single-connection electromagnetic valve 14 through a high-pressure air pipe 6, and the low-pressure air outlet of the pressure regulating valve 2 is connected with the low-pressure double-connection electromagnetic valve 15 through a low-pressure air pipe 7.
In the embodiment of the present application, as shown in fig. 3, 5 and 6, a plurality of equally spaced limit grooves are disposed on the left end of the piston rod 18 exposing the cylinder 12. Further, the gearbox pneumatic gear shifting mechanism further comprises: the self-locking mechanism 4 is arranged on the rear cover shell of the transmission.
The self-locking mechanism further comprises a spring 41 and a steel ball 42, wherein the steel ball 42 can be in locking fit with three limit grooves on the piston rod 18, and as shown in fig. 3, when the pneumatic gear shifting mechanism of the gearbox is in a neutral state, the self-locking mechanism is positioned at the position of the middle groove on the piston rod; as shown in fig. 5, when the gearbox pneumatic gear shifting mechanism is in a high gear state, the self-locking mechanism is positioned at the position of the rightmost groove; as shown in fig. 6, when the gearbox pneumatic gear shifting mechanism is in a low gear state, the self-locking mechanism is positioned at the position of the leftmost groove.
As shown in fig. 3, in this embodiment of the present application, a spacer structure (not labeled in the drawing) for limiting is further disposed between the first piston 16 and the second piston 17. Further, the shift actuator further includes a front cover 11 and a rear cover 13, the front cover 11 and the rear cover 13 being mounted on the left and right sides of the cylinder 12, respectively. It can be seen that the connection between the front cover 11 and the cylinder 12 is provided with a left limiting end surface for blocking the second piston 17 from moving leftwards, and the connection between the rear cover 13 and the cylinder 12 is provided with a right limiting end surface for blocking the first piston 16 from moving rightwards. It should be noted that, in the embodiment of the present application, the direction in which the front cover 11 is located is left, and the direction in which the rear cover 13 is located is right.
Further, the shift actuator 1 includes a magnetic ring 19, and the magnetic ring 19 is mounted on the right end of the piston rod 18 and extends into the rear cover 13. A position sensor 5 for sensing the position of the magnetic ring 19 is provided on the rear cover 13 of the shift actuator 1.
Three different shift embodiments of the transmission pneumatic shift mechanism are also shown in some embodiments of the present application, as shown in connection with fig. 3-6. Of course, the following shift process is not to be construed as limiting the utility model.
Specifically, the shift from neutral to high includes:
the compressed air passes through the air inlet of the pressure regulating valve 2, the pressure is regulated by the pressure regulating valve 2, two paths of working air pressure are generated, wherein the high-pressure air flow is connected with the high-pressure single-connected electromagnetic valve 14 of the gear shifting executing mechanism 1 through the high-pressure air pipe 6, and the low-pressure air flow is connected with the low-pressure double-connected electromagnetic valve 15 through the low-pressure air pipe 7. When the high-gear shifting action is performed, the third chamber 123 is filled with high-pressure air flow, the first chamber 121 is exhausted, the second chamber 122 is filled with low-pressure air flow, pressure difference is generated in the three chambers, the air pressure of the third chamber 123 is higher than that of the second chamber 122, the first piston 16 is pushed to a limiting position and kept, the air pressure of the second chamber 122 is higher than that of the first chamber 121, the second piston 17 is pushed to the limiting position (left limiting end face) of the end face of the front cover 11, the second piston 17 pushes the piston rod 18 to move to the outer side by a preset displacement, the piston rod 18 drives the shifting fork 3 arranged on the piston rod to move by a certain displacement, the shifting fork 3 is connected with a tooth sleeve, and the tooth sleeve is driven to be meshed with a high-gear transmission gear, so that the low-gear shifting to the high-gear shifting is realized.
During gear shifting, when the piston rod 18 moves towards the outer side, the steel balls 42 of the self-locking mechanism 4 are pressed, so that the spring 41 is compressed, the piston rod 18 can move unimpeded, when the gear is shifted to a high-speed gear, the steel balls 42 of the self-locking mechanism 4 fall into grooves on the piston rod 18, which are close to the side (rightmost side) of the cylinder body 12, so that the piston rod 18 realizes mechanical self-locking at the high-speed gear, and axial movement of the piston rod is prevented when the piston rod is subjected to axial force or vibration, and gear disengagement is avoided. Because the magnetic ring 19 is arranged on the piston rod 18, the piston rod 18 drives the magnetic ring 19 to move and generate displacement, and the position sensor 5 arranged on the rear cover 13 can sense the displacement of the magnetic ring, output a position signal and transmit the position signal to the controller so as to realize gear shifting control and monitoring.
The shift from high to neutral includes:
when the high-gear and neutral gear shifting action is performed, the third chamber 123 is filled with high-pressure air, the second chamber 122 is exhausted, the first chamber 121 is filled with low-pressure air, pressure difference is generated between the three chambers, the third chamber 123 is higher than the second chamber 122 in pressure, the first piston 16 is pushed to a limit position and kept, the first chamber 121 is higher than the second chamber 122 in pressure, the second piston 17 is pushed to the first piston 16 to approach, and a spacer structure (not labeled in the figure) for limiting is arranged between the two pistons, so that the two pistons can be kept at the middle position. In the process, the second piston 17 pushes the piston rod 18 to move towards the inner side, the piston rod 18 drives the shifting fork 3 arranged on the piston rod 18 to move, and the tooth sleeve is driven to be separated from the high gear transmission gear, so that the high gear to neutral gear shift is realized. The movement principle of the self-locking mechanism 4 and the position sensor 5 is the same as that of the above, and the description thereof will be omitted.
The shift from neutral to low includes:
when the neutral-low gear shifting action is executed, the third chamber 123 is exhausted, the second chamber 122 is exhausted, the first chamber 121 is subjected to low-pressure air flow, pressure difference is generated by the three chambers, the first chamber 121 is higher than the second chamber 122 and the third chamber 123, the second piston 17 is pushed to approach the first piston 16, the two pistons are limited by a spacer structure in the middle, and the first piston 16 is pushed to move towards the rear cover 13 by the spacer structure until being limited by the end face of the rear cover 13 (right limiting end face). In the process, the second piston 17 pushes the piston rod 18 to move to a certain displacement in the inner side direction, and the piston rod 18 drives the shifting fork 3 arranged on the piston rod to move and drives the tooth sleeve to be meshed with the low gear transmission gear, so that neutral gear to low gear shifting is realized. The movement principle of the self-locking mechanism 4 and the position sensor 5 is the same as that of the above, and the description thereof will be omitted.
In summary, this embodiment provides a pneumatic gear shifting mechanism of a gearbox, including: the automatic transmission comprises a transmission rear cover shell, a gear shifting executing mechanism, a pressure regulating valve and a shifting fork, wherein the gear shifting executing mechanism and the pressure regulating valve are both arranged on the transmission rear cover shell, and the shifting fork is arranged on the gear shifting executing mechanism; during operation, gear adjustment is performed among neutral gear, high gear or low gear through the gear shifting executing mechanism, and in the gear adjustment process, at least two paths of working air pressures are generated by the pressure regulating valve, stable high-pressure air flow and stable low-pressure air flow can be input to the gear shifting executing mechanism, so that the stability of the pneumatic gear shifting mechanism is improved; the mechanical self-locking function at different gears is realized by arranging the self-locking mechanism, which is helpful for preventing gear disengagement; meanwhile, the structure of the actuating cylinder is simplified, so that the pneumatic gear shifting mechanism is more compact in structure, simple in structure and high in integration level, meets the light-weight requirement, and further reduces cost.
It should be noted that, in the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, unless otherwise indicated, the meaning of "plurality" is two or more.
In the present utility model, unless explicitly specified and limited otherwise, terms such as "connected," "fixed" and the like are to be construed broadly and include, for example, either fixedly attached, detachably attached, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description of the terms "one embodiment," "some embodiments," "one embodiment," "example," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely a specific embodiment of the utility model and other modifications and variations can be made by those skilled in the art in light of the above teachings. It is to be understood by persons skilled in the art that the foregoing detailed description is provided for the purpose of illustrating the utility model more fully, and that the scope of the utility model is defined by the appended claims.
Claims (10)
1. A gearbox pneumatic shift mechanism, comprising: the transmission rear cover shell, the gear shifting executing mechanism, the pressure regulating valve and the shifting fork are both arranged on the transmission rear cover shell, the shifting fork is arranged on the gear shifting executing mechanism,
during operation, gear adjustment is performed among neutral gear, high gear or low gear through the gear shifting executing mechanism, and in the gear adjustment process, compressed air can generate at least two paths of working air pressure after passing through the pressure regulating valve.
2. The transmission pneumatic shift mechanism as claimed in claim 1, wherein the shift actuator comprises a cylinder, a first piston, a second piston located to the left of the first piston, and a piston rod,
the first piston and the second piston are assembled in the cylinder body in a sliding way, the interior of the cylinder body is divided into a first chamber, a second chamber and a third chamber from left to right by the first piston and the second piston in sequence,
one end of the piston rod can penetrate through the cylinder body, is fixedly connected with the first piston and the second piston respectively, the other end of the piston rod is connected with the shifting fork, and meanwhile, the piston rod can drive the shifting fork to move left and right along the axial direction so as to shift gears.
3. The pneumatic gear shifting mechanism of the gear box according to claim 2, wherein a high-pressure single-connection electromagnetic valve and a low-pressure double-connection electromagnetic valve are arranged on the cylinder body of the gear shifting executing mechanism,
the low-pressure duplex electromagnetic valve is respectively provided with a first valve port communicated with the first chamber and a second valve port communicated with the second chamber,
and a third valve port communicated with the third chamber is arranged on the high-pressure single-connected electromagnetic valve.
4. A pneumatic gear shifting mechanism for a gearbox according to claim 3, characterized in that the pressure regulating valve is provided with an air inlet, a high-pressure air outlet and a low-pressure air outlet,
the air inlet of the pressure regulating valve is connected with a compressed air pipeline, the high-pressure air outlet of the pressure regulating valve is connected with the high-pressure single-connection electromagnetic valve through a high-pressure air pipe, and the low-pressure air outlet of the pressure regulating valve is connected with the low-pressure double-connection electromagnetic valve through a low-pressure air pipe.
5. The pneumatic gear shifting mechanism of a gear box according to claim 2, wherein a plurality of equally spaced limit grooves are provided on the left end of the piston rod exposed out of the cylinder.
6. The transmission pneumatic shift mechanism of claim 5, further comprising: the self-locking mechanism is arranged on the rear cover shell of the speed changer.
7. The transmission pneumatic shifting mechanism according to claim 2, wherein a spacer structure for limiting is further provided between the first piston and the second piston.
8. The transmission pneumatic shift mechanism of claim 2, wherein the shift actuator further comprises a front cover and a rear cover, the front cover and the rear cover being mounted to the left and right sides of the cylinder, respectively.
9. The pneumatic gear shifting mechanism of a gearbox according to claim 8, wherein a left limiting end face for blocking leftward movement of the second piston is arranged at a joint of the front cover and the cylinder body, and a right limiting end face for blocking rightward movement of the first piston is arranged at a joint of the rear cover and the cylinder body.
10. The transmission pneumatic shift mechanism as claimed in claim 8, wherein the shift actuator comprises a magnetic ring,
the magnetic ring is arranged at the right end part of the piston rod, and a position sensor for sensing the position of the magnetic ring is arranged on the rear cover of the gear shifting executing mechanism.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320206750.9U CN219317585U (en) | 2023-02-03 | 2023-02-03 | Pneumatic gear shifting mechanism of gearbox |
| PCT/CN2023/119959 WO2024159769A1 (en) | 2023-02-03 | 2023-09-20 | Pneumatic gear shifting mechanism of gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320206750.9U CN219317585U (en) | 2023-02-03 | 2023-02-03 | Pneumatic gear shifting mechanism of gearbox |
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| Publication Number | Publication Date |
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| CN219317585U true CN219317585U (en) | 2023-07-07 |
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| CN202320206750.9U Active CN219317585U (en) | 2023-02-03 | 2023-02-03 | Pneumatic gear shifting mechanism of gearbox |
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| WO (1) | WO2024159769A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024159769A1 (en) * | 2023-02-03 | 2024-08-08 | 精进电动科技股份有限公司 | Pneumatic gear shifting mechanism of gearbox |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0716931Y2 (en) * | 1987-02-19 | 1995-04-19 | 三菱自動車工業株式会社 | Vehicle transmission actuator device |
| JP4813277B2 (en) * | 2006-07-13 | 2011-11-09 | 日野自動車株式会社 | Drive device for transmission |
| CN202176707U (en) * | 2011-08-15 | 2012-03-28 | 瑞立集团瑞安汽车零部件有限公司 | Pneumatic siting and shift actuating mechanism, vehicle speed changing device and vehicle |
| CN102966731B (en) * | 2012-12-03 | 2016-05-04 | 浙江亿日气动科技有限公司 | Speed changer Pneumatic shift operating system |
| CN203322241U (en) * | 2013-07-05 | 2013-12-04 | 瑞立集团瑞安汽车零部件有限公司 | AMT gear shifting executing mechanism |
| CN205479301U (en) * | 2016-03-28 | 2016-08-17 | 常熟理工学院 | Pneumatic gearshift |
| CN110594407A (en) * | 2019-08-28 | 2019-12-20 | 西安法士特汽车传动有限公司 | Multi-gear transmission control system |
| CN111609127A (en) * | 2020-06-03 | 2020-09-01 | 重庆永发工业有限公司 | Shifting fork gear shifting method, gearbox, new energy vehicle power assembly and vehicle |
| CN112413113A (en) * | 2020-11-18 | 2021-02-26 | 瑞立集团瑞安汽车零部件有限公司 | Select integrated device that shifts based on commercial car AMT derailleur assembly |
| CN114607677A (en) * | 2020-12-03 | 2022-06-10 | 郑州宇通客车股份有限公司 | Gear shifting piston cylinder system and fault detection method thereof |
| CN219317585U (en) * | 2023-02-03 | 2023-07-07 | 精进电动科技股份有限公司 | Pneumatic gear shifting mechanism of gearbox |
-
2023
- 2023-02-03 CN CN202320206750.9U patent/CN219317585U/en active Active
- 2023-09-20 WO PCT/CN2023/119959 patent/WO2024159769A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024159769A1 (en) * | 2023-02-03 | 2024-08-08 | 精进电动科技股份有限公司 | Pneumatic gear shifting mechanism of gearbox |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024159769A1 (en) | 2024-08-08 |
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