Gear shifting air cylinder assembly and gearbox system

Abstract

The utility model relates to the technical field of vehicle gear shifting, and provides a gear shifting air cylinder assembly and a gearbox system. The gear shifting air cylinder assembly comprises an air cylinder and a gear shifting assembly, wherein the air cylinder comprises a plurality of axially arranged cylinder bodies; the partition plates are arranged between the adjacent cylinder bodies, and the partition plates are in sealing fit with the cylinder bodies to form a plurality of working cavities; the piston comprises a plurality of piston bodies connected through a piston rod, the piston rod penetrates through the partition plate, and the piston bodies are located in the working cavities respectively and can do axial reciprocating motion; and the plurality of air passages are distributed in the partition plate and are respectively communicated with the plurality of working cavities. The air channels are arranged in the partition plate, the air channels do not need to be machined on the cylinder body, the structural design of the air cylinder can be simplified, the cylinder body can be formed in a stamping mode and the like, and the machining cost of the air cylinder is greatly reduced. The air channels are arranged in the partition plates, air supply from the middle is achieved, air paths are concentrated, the structure is compact, and maintenance is convenient. The gear shifting air cylinder assembly can further form modular design, the cylinder body and the partition plate can be assembled according to needs, and various use scenes can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle gear shifting technical field, concretely relates to gear shift cylinder assembly and gearbox system. BACKGROUND

[0002] The gearbox system of automatic gear shifting can automatically select the appropriate gear according to the vehicle state. In order to realize automatic gear shifting, the gear shift cylinder of the gearbox system is usually provided with multiple cavities, and under different working conditions, the piston in the gear shift cylinder is moved to the target position through the pressure control of each cavity, and then the gear is switched to the target gear through the gear shift fork connected with the piston and other structures.

[0003] The air passage of the current gear shift cylinder, which connects the cavities and valve pieces, is arranged on the cylinder wall, and the defect is that multiple air passages connecting multiple cavities need to be machined on the cylinder wall, which makes the cylinder structure complex on the one hand, and on the other hand, such cylinder can only adopt casting and machining process, and the processing cost is high.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the utility model, and therefore can include information that does not constitute prior art known to those skilled in the art. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides a gear shift cylinder assembly and gearbox system, which can simplify the cylinder structure design and reduce the processing cost.

[0006] According to one aspect of the utility model, a gear shift cylinder assembly is provided, comprising: a cylinder comprising multiple cylinder bodies arranged axially; a partition plate arranged between adjacent cylinder bodies, the partition plate being in sealing cooperation with the cylinder bodies to form multiple working cavities; a piston comprising multiple piston bodies connected by a piston rod, the piston rod penetrating through the partition plate, the multiple piston bodies being respectively located in the multiple working cavities and being capable of axial reciprocating motion; and multiple air passages distributed in the partition plate and respectively connecting the multiple working cavities.

[0007] In some embodiments, the cylinder body is formed as a one-piece rotary body structure.

[0008] In some embodiments, a compression sealing ring is arranged between the partition plate and the cylinder body, and the partition plate is tightly connected with the cylinder body.

[0009] In some embodiments, the piston body and the cylinder body are in sealing sliding connection, and the piston rod and the partition plate are in sealing sliding connection.

[0010] In some embodiments, the shift cylinder assembly further includes a supporting piston disposed between the piston body and the cylinder body; wherein the supporting piston and the piston body, and the supporting piston and the cylinder body, are both sealed and slidably connected.

[0011] In some embodiments, the inner wall of the cylinder is provided with a step, which is used to limit the support piston and allow the piston body to pass through.

[0012] In some embodiments, the air passage of each working chamber is connected to a different valve, or at least some of the working chambers are connected to different valve chambers of the same valve.

[0013] In some embodiments, the cylinder includes an adjacent first cylinder body and a second cylinder body; the partition is sealed with the first cylinder body to form a first working chamber and with the second cylinder body to form a second working chamber; the piston includes a first piston body located in the first working chamber and a second piston body located in the second working chamber; the air passage includes a first air passage communicating with the first working chamber and a second air passage communicating with the second working chamber.

[0014] In some embodiments, the first cylinder and the second cylinder are integrally formed with their respective end caps.

[0015] In some embodiments, the shift cylinder assembly has one or more of the following operating states: air is introduced into the first working chamber, and the piston moves toward the first cylinder body to a first working position; air is introduced into the second working chamber, and the piston moves toward the second cylinder body to a second working position; air is introduced into the first working chamber and the second working chamber at the same time, and the piston moves to a third working position where the forces are balanced.

[0016] According to another aspect of the present invention, a gearbox system is provided, the gearbox system being configured with a shift cylinder assembly as described in any of the above embodiments.

[0017] The beneficial effects of this utility model compared with the prior art include at least the following:

[0018] This invention integrates the air passages within a partition located between adjacent cylinders, eliminating the need to machine the air passages onto the cylinder body. This simplifies the cylinder's structural design, and the cylinder body can be formed using stamping or other methods, significantly reducing manufacturing costs. The partition and cylinder body form a sealed fit, creating multiple working chambers for the shift cylinder assembly. Combined with the split cylinder body and partition design, the piston is designed to include multiple piston bodies connected by a piston rod passing through the partition. Each piston body reciprocates axially within one of the multiple working chambers. Under different operating conditions, high-pressure gas is introduced into the corresponding working chamber through the corresponding air passage, controlling the piston movement to the corresponding working position, thereby achieving the shifting drive for the target gear. This invention, by integrating the air passages within the partition, allows for central air supply. Compared to end-entry designs, this reduces the space occupied by the air passages, resulting in a more concentrated, compact structure and easier maintenance.

[0019] The shift cylinder assembly of this utility model can be modularly designed, and the various components can be assembled as needed to achieve flexible design and meet various usage scenarios.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. It is obvious that the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0022] Figure 1 and Figure 2 This diagram shows a cross-sectional view of the shift cylinder assembly in an embodiment of the present invention.

[0023] Figure 3 This diagram shows the structure of the piston in the first working position in an embodiment of the present invention.

[0024] Figure 4 This diagram shows a schematic of the piston in the second working position in an embodiment of the present invention.

[0025] Figure 5 and Figure 6 This diagram shows a schematic of the piston in the third working position in an embodiment of the present invention. Detailed Implementation

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to those described herein. Rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0027] The accompanying drawings are merely illustrative of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore, repeated descriptions of them will be omitted.

[0028] The terms "first," "second," and similar words used in the specific description do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. The term "multiple" means two or more, unless otherwise explicitly specified. Furthermore, in the description of the present invention, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components.

[0029] It should be noted that, unless otherwise specified, the embodiments of this utility model and the features in different embodiments can be combined with each other.

[0030] Figure 1 and Figure 2 The diagram shows the cross-sectional structure of the shift cylinder assembly. Figure 1 and Figure 2 The shift cylinder assembly is sectioned from different axial sections to illustrate the various air passages. (Combined) Figure 1 and Figure 2 As shown, the shift cylinder assembly provided in this embodiment of the present invention includes:

[0031] A cylinder, comprising a plurality of cylinder blocks (11, 12) arranged axially;

[0032] The partition 20 is disposed between adjacent cylinders (11, 12). The partition 20 is sealed to the cylinders (11, 12) to form multiple working chambers (110, 120).

[0033] The piston includes multiple piston bodies (31, 32) connected by a piston rod 33, the piston rod 33 passes through the partition 20, and the multiple piston bodies (31, 32) are respectively located in multiple working chambers (110, 120) and can reciprocate axially.

[0034] Multiple air passages (P1, P2) are distributed in the partition 20 and are connected to multiple working chambers (110, 120).

[0035] This invention places the air passages (P1, P2) within the partition 20 located between adjacent cylinders (11, 12), eliminating the need to machine the air passages (P1, P2) onto the cylinders (11, 12). This simplifies the cylinder's structural design, and the cylinders (11, 12) can be formed using stamping or other methods, significantly reducing the cylinder's manufacturing cost. The partition 20 and cylinders (11, 12) are sealed together to form multiple working chambers (110, 120) of the shift cylinder assembly. In conjunction with the split cylinder design (11, 12) and partition 20, the piston is designed to include multiple piston bodies (31, 32) connected by a piston rod 33. The piston rod 33 passes through the partition 20, and the multiple piston bodies (31, 32) reciprocate axially within the multiple working chambers (110, 120). Under different operating conditions, high-pressure gas is introduced into the corresponding working chamber through the corresponding air passage, controlling the piston movement to the corresponding working position to achieve shifting drive. This invention sets the air passages (P1, P2) in the partition 20 to supply air from the middle. Compared with the scheme of air intake from the end, it can reduce the space occupied by the air passages (P1, P2), making the air passage concentrated, the structure compact, and easy to maintain.

[0036] The shift cylinder assembly of this utility model can be modularly designed, and the various components can be assembled as needed to achieve flexible design and meet various application scenarios. For example, according to the required number of gears, an appropriate number of cylinders can be selected and matched with corresponding baffles to form an appropriate number of working chambers; or, according to the shift control requirements, a cylinder of appropriate size can be selected and matched with baffles with corresponding air passages to form a working chamber of appropriate volume.

[0037] Figure 1 and Figure 2 The diagram illustrates that the cylinder comprises two cylinder bodies (11, 12), and two independent air passages (P1, P2) are provided on the partition 20, leading to two working chambers (110, 120) respectively, but this is not a limitation. Depending on different application scenarios, the number of cylinder bodies, the volume of the working chambers, the orifice diameter of the air passages, the distribution of the air passages, etc., can all be adjusted as needed.

[0038] In some embodiments, since the baffle 20 is used as a guide plate, high-pressure gas enters the working chamber (110, 120) through the air passages (P1, P2) arranged on the baffle 20, without having to pass through the cylinder body (11, 12). Therefore, the cylinder body (11, 12) can simplify its structural design, forming an integral rotating structure. It can be formed in one stamping process, significantly reducing costs and giving the cylinder body (11, 12) a continuous outer surface and inner cavity. The overall wall thickness is uniform, dimensional accuracy is high, and surface finish is good, meeting the structural stability and sealing requirements during use. The baffle 20 can be made of aluminum alloy, but is not limited to this, as long as it can seal with the cylinder body (11, 12) to form the working chamber (110, 120) and is suitable for arranging the air passages (P1, P2). In the piston design, the piston rod connecting two adjacent piston bodies can be integrally formed with one piston body and connected to the other piston body by fastening or other means.

[0039] In some embodiments, a sealing ring 40 is pressed between the partition 20 and the cylinder body (11, 12) to achieve a sealed fit between the partition 20 and the cylinder body (11, 12). Furthermore, the partition 20 and the cylinder body (11, 12) are fastened together for easy assembly. In other embodiments, the partition 20 and the cylinder body (11, 12) can also be connected by adhesive bonding, welding, or other methods, as long as a tight and stable fit can be achieved to form a sealed working cavity (110, 120).

[0040] In some embodiments, the piston body (31, 32) and the cylinder body (11, 12), and the piston rod 33 and the partition plate 20 are all sealed sliding connections. This allows the piston to reciprocate axially within the cylinder, enabling it to move to different working positions under the air pressure of different working chambers, thereby allowing the gearbox system to switch to the appropriate gear.

[0041] In some embodiments, the shift cylinder assembly further includes: a support piston 50, disposed between the piston body and the cylinder body. Figure 1 and Figure 2 Specifically, the supporting piston 50 is positioned between the first piston body 31 and the first cylinder body 11; wherein, the supporting piston 50 and the piston body, and the supporting piston 50 and the cylinder body, are both sealed sliding connections. The supporting piston 50 can achieve adaptation between the piston body and the cylinder body. According to design requirements, the supporting piston 50 can be set between one or more piston bodies and corresponding cylinder bodies. Under the action of air pressure in different working chambers, the supporting piston 50 and the corresponding piston body can move synchronously or separately.

[0042] One method is to groove the corresponding components and embed a sealing ring to achieve a sealed sliding connection between the two components. Alternatively, oil seals, special coatings, or other methods can be used to achieve a sealed sliding connection between the components.

[0043] Furthermore, in some embodiments, the inner wall of the cylinder is provided with a step 60, which serves to limit and support the piston 50 while allowing the piston body to pass through. Figure 1 and Figure 2 Taking the structure shown as an example, the inner wall of the first cylinder 11 is provided with a step 60, which is used to limit and support the piston 50 and allow the first piston body 31 to pass through.

[0044] By limiting the support piston 50 through step 60, the piston can be balanced under specific working conditions and maintained in the target working position, thereby enabling the transmission system to shift to the target gear. Specifically, combined with Figure 1 and Figure 2 As shown, when the first working chamber 110 and the second working chamber 120 are simultaneously filled with air, the piston moves under the air pressure of the two working chambers until the supporting piston 50 abuts against the step 60 and the first piston body 31 abuts against the supporting piston 50, achieving a state of force balance; Figure 1 and Figure 2 In this state, when the first working chamber 110 is intake alone, the piston moves to the left; when the second working chamber 120 is intake alone, the piston drives the support piston 50 to move to the right together.

[0045] In the above embodiments, the air passage of each working chamber can be connected to different valves (not specifically shown in the figures) to achieve input pressure control of each working chamber, allowing each working chamber to intake air independently or multiple working chambers to intake air simultaneously. The air passages of some or all working chambers can also be connected to different valve chambers of the same valve, similarly enabling input pressure control of each working chamber. The valves referred to in this invention can be suitable valves such as solenoid valves or control valves. These valves, under the control of the vehicle's controller (e.g., electronic control unit ECU), deliver a suitable amount of high-pressure gas to the corresponding working chamber to push the piston to a predetermined working position, thereby enabling the vehicle to shift to the appropriate gear.

[0046] In some specific implementation methods, combined Figure 1 and Figure 2As shown, the cylinder includes an adjacent first cylinder body 11 and a second cylinder body 12. A partition 20 is sealed to the first cylinder body 11 to form a first working chamber 110, and to the second cylinder body 12 to form a second working chamber 120. The piston includes a first piston body 31 located in the first working chamber 110 and a second piston body 32 located in the second working chamber 120. The air passage includes a first air passage P1 connecting the first working chamber 110 and a second air passage P2 connecting the second working chamber 120. In other implementations, as described above, the number of cylinders, the volume of the working chamber, the orifice diameter of the air passage, the distribution of the air passage, and other design elements can be adjusted as needed to adapt to different application scenarios.

[0047] Among them, such as Figure 1 and Figure 2 As shown, the first cylinder body 11 and the second cylinder body 12 are integrally formed with the corresponding end caps, which can greatly simplify the structural design of the cylinder and reduce the processing cost.

[0048] With the cylinder comprising an adjacent first cylinder block 11 and a second cylinder block 12, the shift cylinder assembly can achieve at least three operating states, driving the piston to three operating positions. Specifically, Figure 3 The diagram illustrates the structure with the piston in its first working position. Figure 4 This diagram illustrates the structure where the piston is in its second working position. Figure 5 and Figure 6 The diagram illustrates the structure with the piston in the third working position, combined with... Figures 1 to 6 As shown, in some specific implementations, the shift cylinder assembly can have the following three working states.

[0049] Combination Figure 1 , Figure 2 and Figure 3 As shown, in the first working state, high-pressure gas from the corresponding valve enters the first working chamber 110 through the first air passage P1. Under the action of the air pressure in the first working chamber 110, the piston moves toward the first cylinder 11 to the first working position. The first working position is, for example, when the piston moves toward the first cylinder 11 until the first piston body 31 abuts against the end wall of the first cylinder 11, that is, the piston moves to the left to its extreme position, but is not limited to this.

[0050] Combination Figure 1 , Figure 2 and Figure 4 As shown, in the second operating state, high-pressure gas from the corresponding valve enters the second working chamber 120 through the second air passage P2. Under the action of the air pressure in the second working chamber 120, the piston moves toward the second cylinder 12 to the second working position. The second working position is, for example, when the piston moves toward the second cylinder 12 until the second piston body 32 abuts against the end wall of the second cylinder 12, that is, the piston moves to the right to its extreme position, but is not limited to this.

[0051] In some operating conditions, when the shift cylinder assembly is in the first operating state, the transmission system shifts to a higher gear; when the shift cylinder assembly is in the second operating state, the transmission system shifts to a lower gear. Alternatively, when the shift cylinder assembly is in the first operating state, the transmission system shifts to a lower gear; when the shift cylinder assembly is in the second operating state, the transmission system shifts to a higher gear.

[0052] Combination Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in the third working state, the high-pressure gas from the corresponding valve enters the first working chamber 110 through the first air passage P1 and enters the second working chamber 120 through the second air passage P2. Under the combined air pressure of the first working chamber 110 and the second working chamber 120, the piston moves to the point where the supporting piston 50 abuts against the step 60 and the first piston body 31 abuts against the supporting piston 50, achieving a state of force balance. At this time, the piston is in the third working position, and the gearbox system can shift to neutral.

[0053] Figures 3 to 6 In the image, the working chamber and air passage, covered by gray dotted shadows, are in an air intake state. Depending on the design requirements of different working positions, the air intake volume of each working chamber and the position of step 60 can be adjusted. In other embodiments, the shift cylinder assembly can have more working states than those described above.

[0054] This utility model embodiment also provides a gearbox system, which is equipped with a shift cylinder assembly as described in any of the above embodiments. The shift cylinder assembly can be connected to the shift fork and other structures of the gearbox system via a push rod 34 connected to the piston.

[0055] This invention places the air passages (P1, P2) within the partition 20 located between adjacent cylinder blocks (11, 12), eliminating the need to machine the air passages (P1, P2) onto the cylinder blocks (11, 12). This simplifies the cylinder structural design, and the cylinder blocks (11, 12) can be formed using stamping or other methods, significantly reducing cylinder processing costs. This, in turn, simplifies the structural design of the transmission system and lowers its processing costs. By placing the air passages (P1, P2) within the partition 20, this invention enables air supply from the center. Compared to end-entry designs, this reduces the space occupied by the air passages (P1, P2), resulting in a more concentrated, compact, and easier-to-maintain air path in the transmission system. Furthermore, the shift cylinder assembly of this invention can be modularly designed, allowing for flexible assembly of components as needed. This design caters to various transmission system usage scenarios and is suitable for various vehicle types, including light trucks.

[0056] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A shift cylinder assembly characterized by, The application relates to a shift cylinder assembly. The cylinder comprises a plurality of cylinder bodies arranged axially; A partition plate is arranged between adjacent cylinder bodies, and the partition plate is in sealing cooperation with the cylinder bodies to form a plurality of working chambers; A piston comprises a plurality of piston bodies connected by a piston rod, the piston rod passes through the partition plate, and the plurality of piston bodies are respectively located in the plurality of working chambers and can move axially and reciprocally; A plurality of air passages are distributed in the partition plate and respectively communicate with the plurality of working chambers.

2. The shift cylinder assembly of claim 1, wherein, The cylinder bodies are formed into an integrated rotary body structure.

3. The shift cylinder assembly of claim 1, wherein, A compression sealing ring is arranged between the partition plate and the cylinder bodies, and the partition plate is fastened to the cylinder bodies.

4. The shift cylinder assembly of claim 1, wherein, The piston bodies and the cylinder bodies and the piston rod and the partition plate are all in sealing and sliding cooperation.

5. The shift cylinder assembly of claim 1, wherein, The application further relates to: A support piston is arranged between the piston bodies and the cylinder bodies. The support piston and the piston bodies and the support piston and the cylinder bodies are all in sealing and sliding cooperation.

6. The shift cylinder assembly of claim 5, wherein, The inner wall of the cylinder body is provided with a step, the step is used for limiting the support piston and allowing the piston bodies to pass.

7. The shift cylinder assembly of claim 1, wherein, The air passages of each working chamber are connected with different valve parts, or the air passages of at least part of the working chambers are connected with different valve cavities of the same valve part.

8. The shift cylinder assembly according to any one of claims 1-7, wherein: The cylinder comprises a first cylinder body and a second cylinder body; The partition plate is in sealing cooperation with the first cylinder body to form a first working chamber and is in sealing cooperation with the second cylinder body to form a second working chamber; The piston comprises a first piston body located in the first working chamber and a second piston body located in the second working chamber; The air passages comprise a first air passage communicating with the first working chamber and a second air passage communicating with the second working chamber.

9. The shift cylinder assembly of claim 8, wherein, The first cylinder body and the second cylinder body are integrally formed with corresponding end covers.

10. The shift cylinder assembly of claim 8, wherein, The shift cylinder assembly has one or more of the following working states: The first working chamber is filled with air, and the piston moves towards the first cylinder body to a first working position; The second working chamber is filled with air, and the piston moves towards the second cylinder body to a second working position; The first working chamber and the second working chamber are simultaneously filled with air, and the piston moves to a third working position in force balance.

11. A gearbox system characterized in that, The gearbox system is provided with the shift cylinder assembly according to any one of claims 1-10.

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