Hydro-pneumatic suspension slide valve type inflating device for tracked vehicle

Abstract

The utility model discloses a hydro-pneumatic suspension slide valve type inflation device for a tracked vehicle, which relates to the field of maintenance of a tracked vehicle action system, and comprises an inflation valve body, and a first channel communicated with a gas supply source and a second channel for supplying gas to a pressure accumulator are arranged in the inflation valve body; one end of the first channel extends to the side wall of the inflation valve body to form a first air outlet, and one end of the second channel extends to the side wall of the inflation valve body to form a second air inlet; the inflation valve body is movably sleeved with the sliding sealing assembly, the sliding sealing assembly is provided with a first position and a second position on the inflation valve body, and when the sliding sealing assembly is located at the first position, the sliding sealing assembly seals the second air inlet; and when moving to the second position, the sliding sealing assembly is communicated with the first air outlet and the second air inlet. The problem that in the prior art, due to the fact that time errors exist between the air supply state and the air storage state of a spiral inflation valve, the phenomenon of over-inflation or under-inflation is caused is solved.

Description

Technical Field

[0001] This invention relates to the field of tracked vehicle mobility system maintenance, and more specifically to a slide valve type air inflation device for tracked vehicle hydropneumatic suspension. Background Technology

[0002] As a critical shock-absorbing component, the hydropneumatic suspension system of tracked vehicles directly affects the vehicle's suspension performance and driving safety through the stability of its accumulator chamber pressure. During operations in complex terrain, the hydropneumatic suspension continuously absorbs road impact energy through the nitrogen spring effect. During this process, the chamber pressure fluctuates periodically with the reciprocating motion of the suspension system. To ensure system reliability, current maintenance procedures require periodic pressure compensation of the accumulator, typically using a spiral inflation valve.

[0003] In actual use, the screw-type inflation valve mainly relies on the rotational motion of the threaded pair to drive the axial displacement of the vent needle within the valve. Multiple turns of the screw drive are required to completely separate or close the valve's air passage during opening and closing. This gradual opening and closing mechanism results in a significant time delay in establishing and cutting off the gas passage between the screw-type inflation valve and the accumulator. Therefore, although operators can monitor the dynamic air pressure in the accumulator in real time using a pressure gauge, the time error between the valve's switching between replenishment and accumulation states easily leads to over-inflation or under-inflation due to the delayed state transition. This precision defect not only affects the vibration damping performance of the suspension system but can also cause air chamber pressure imbalance, leading to abnormal loads on the torsion shaft and shortening the service life of critical components, making it inconvenient to use. Summary of the Invention

[0004] This application provides a slide valve type air inflation device for tracked vehicle hydropneumatic suspension, which can solve the technical problem in the prior art where there is a time error between the switching of the spiral air inflation valve to the air replenishment state and the air storage state, which leads to over-inflation or under-inflation.

[0005] This application provides a slide valve type air inflation device for a tracked vehicle's hydropneumatic suspension, comprising:

[0006] An inflation valve body is provided with a first channel for connecting to an air supply source and a second channel for supplying air to an accumulator. One end of the first channel extends to the side wall of the inflation valve body to form a first air outlet, and one end of the second channel extends to the side wall of the inflation valve body to form a second air inlet.

[0007] And a sliding sealing assembly, which is movably sleeved on the inflation valve body, the sliding sealing assembly having a first position and a second position on the inflation valve body, wherein when in the first position, the sliding sealing assembly seals the second air inlet; and when moved to the second position, the sliding sealing assembly connects the first air outlet and the second air inlet.

[0008] In one embodiment, the sliding sealing assembly includes:

[0009] A sealing sleeve is fitted onto the inflation valve body, and the sealing sleeve is made of a rigid material.

[0010] A sealing ring is fitted onto the outer wall of the inflation valve body and located inside the sealing sleeve.

[0011] In one embodiment, an installation groove is provided on the inner wall of the sealing sleeve, and the sealing ring is located in the installation groove.

[0012] In one embodiment, the inner diameter of the sealing sleeve is larger than the outer diameter of the inflation valve body, so as to form a third channel between the sealing sleeve and the inflation valve body for communicating the first air outlet and the second air inlet.

[0013] Alternatively, the sealing sleeve may also have a third channel inside for connecting the first air outlet and the second air inlet, with both ends of the third channel extending to the inner wall of the sealing sleeve to form a third air inlet and a third air outlet.

[0014] In one embodiment, the sliding sealing assembly includes:

[0015] A sealing sleeve is fitted onto the inflation valve body, and the sealing sleeve is made of an elastic material.

[0016] Additionally, a reinforcing steel ring is embedded within the sealing sleeve, such that the portion of the sealing sleeve located between the reinforcing steel ring and the inflation valve body forms a sealing section.

[0017] In one embodiment, the inner wall of the sealing sleeve is further provided with a third channel for connecting the first air outlet and the second air inlet.

[0018] Alternatively, the sealing sleeve may also have a third channel inside for connecting the first air outlet and the second air inlet, with both ends of the third channel extending to the inner wall of the sealing sleeve to form a third air inlet and a third air outlet.

[0019] In one embodiment, the inflation valve body is provided with a limiting flange, and when the sealing sleeve abuts against the limiting flange, the sealing sleeve is located in a first position.

[0020] In one embodiment, a valve needle is provided at one end of the inflation valve body. The valve needle is inclined outward and downward from the inflation valve body, and an air inlet is provided on the valve needle. The air inlet is connected to the second channel.

[0021] In one embodiment, a tracked vehicle hydropneumatic suspension sliding valve type inflation device further includes:

[0022] A sealing nut, which is fitted onto the valve needle.

[0023] In one embodiment, the end of the inflation valve body away from the valve needle is provided with a threaded connection portion, which communicates with the first air outlet and is used to connect to the air supply source.

[0024] The beneficial effects of the technical solutions provided in this application include:

[0025] By installing a sliding seal on the inflation valve body, when the accumulator needs to be replenished with air, the sliding seal is slid to the second position. At this time, the sliding seal assembly connects the first air outlet and the second air inlet. The gas in the air supply source enters the first channel through the first air outlet, then passes through the sliding seal and enters the second air inlet. Through the second air inlet, it enters the accumulator through the second channel to replenish the accumulator. When the air pressure in the accumulator is replenished to the required level, the operator only needs to move the sliding seal to the first position. At this time, the sliding seal disconnects the connection between the first air outlet and the second air inlet and seals the second air inlet, which can quickly complete the switching between the replenishment state and the accumulator state. The structure is simple and easy to use, which solves the problem of time error between the switching between the replenishment state and the accumulator state in the existing spiral inflation valve, which leads to over-inflation or under-inflation. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the inflation valve body in a slide valve type inflation device for a tracked vehicle's hydropneumatic suspension according to this application.

[0028] Figure 2 This is a cross-sectional view of a slide valve-type air inflator for a tracked vehicle's hydropneumatic suspension in this application, in the air-filling state.

[0029] Figure 3This is a cross-sectional view of a slide valve-type air inflator for a tracked vehicle's hydropneumatic suspension in this application during the air replenishment process.

[0030] In the diagram: 1. Inflation valve body; 11. First air outlet; 111. First channel; 12. Second air inlet; 121. Second channel; 13. Limiting flange; 14. Threaded connection; 2. Valve needle; 21. Air outlet; 3. Sealing sleeve; 31. Sealing groove; 32. Receiving groove; 321. Seal; 4. Sealing nut. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0032] This application provides a slide valve-type inflation device for a tracked vehicle's hydropneumatic suspension, which can solve the problem in the prior art where there is a time error between the switching of the spiral inflation valve to the replenishment state and the storage state, which leads to over-inflation or under-inflation.

[0033] Reference Figure 1This application discloses a sliding valve-type inflation device for a tracked vehicle's hydropneumatic suspension, comprising an inflation valve body 1 and a sliding sealing assembly. The inflation valve body 1 is provided with a first channel 111 for connecting to an air supply source and a second channel 121 for supplying air to an accumulator. One end of the first channel 111 extends to the side wall of the inflation valve body 1 to form a first air outlet 2111, and one end of the second channel 121 extends to the side wall of the inflation valve body 1 to form a second air inlet 12. The first channel 111 and the second channel 121 are not connected inside the inflation valve body 1. The sliding sealing assembly is movably sleeved on the inflation valve body 1 and has a first position and a second position on the inflation valve body 1. The first position and the second position of the sliding sealing assembly can be switched by sliding the sliding sealing assembly along the length direction of the inflation valve body 1. When the sliding sealing assembly is in the first position, it seals the second air inlet 12. Since the second air inlet 12 is connected to the accumulator, the sliding sealing assembly seals the second air inlet 12 alone to achieve the air storage sealing function for the accumulator. When the sliding sealing assembly is in the second position, it connects the first air outlet 2111 and the second air inlet 12. Since the first channel 111, which connects to the first air outlet 2111, is connected to the air supply source, the gas in the air supply source enters the second air inlet 12 through the sliding sealing assembly and then fills the accumulator to achieve the air replenishment function. When the operator performs air replenishment on the accumulator, by observing the real-time air pressure of the accumulator, when the air pressure value in the accumulator reaches the air replenishment threshold, the operator only needs to switch the sliding sealing assembly from the second position to the first position to quickly end the air replenishment operation. The structure is simple and easy to use, solving the problem in the prior art where there is a time error between the switching of the spiral air valve to the air replenishment state and the air storage state, which leads to overcharging or undercharging.

[0034] Reference Figures 1-3 The sliding sealing assembly includes a sealing sleeve and a sealing ring. In one embodiment of this application, the sealing sleeve is made of a rigid material, so that when the sealing sleeve is in the second position (air replenishment state), it is not easily deformed by the impact of high-pressure gas. The sealing ring is sleeved on the outer wall of the air filling valve body 1 and is located inside the sealing sleeve to seal the contact between the sealing sleeve and the air filling valve body 1, reducing the possibility of air leakage when the rigid material sealing sleeve is in the first position (air filling function of the accumulator).

[0035] More specifically, an installation groove is provided on the inner wall of the sealing sleeve, and the sealing ring is specifically disposed in the installation groove. In one embodiment of this application, installation grooves of the same specification are provided at both ends of the sealing sleeve along its length, and the installation groove is opened along the circumference of the sealing sleeve. A sealing ring is provided in each of the two installation grooves, and the sealing ring is fixed in the installation groove by adhesive to achieve a tight connection between the sealing groove and the sealing sleeve.

[0036] In this embodiment, the inner diameter of the sealing sleeve is slightly larger than the outer diameter of the inflation valve body 1. The two sealing rings extend from the mounting groove and abut against the outer surface of the inflation valve body 1. Since the inner diameter of the sealing sleeve is slightly larger than the outer diameter of the inflation valve body 1, a third channel can be formed between the two sealing rings.

[0037] Reference Figure 2 When the sealing sleeve moves to the first position, the sealing sleeve only covers the second air inlet 12 so that the third channel is connected to the second air inlet 12. Since the third channel is sealed by two sealing rings, the sealing and accumulating effect of the second air inlet 12, i.e. the accumulator, is achieved.

[0038] Reference Figure 3 When the sealing sleeve moves to the second position, it simultaneously covers both the first air outlet 2111 and the second air inlet 12, allowing the third channel to connect with both. At this point, the high-pressure gas from the gas supply source can enter the third channel from the first air outlet 2111 along the first channel 111, and then enter the accumulator through the second air inlet 12, thus connecting the first channel 111 and the second channel 121 via the third channel. Because the high-pressure gas supplied by the gas supply source is higher than the original pressure inside the accumulator, unidirectional gas flow is achieved to replenish the accumulator. The operator constantly monitors the real-time pressure inside the accumulator. When the real-time pressure reaches the pressure threshold, the sealing sleeve is moved from the second position to the first position, cutting off the connection between the first channel 111 and the second channel 121, quickly cutting off the gas supply, and reducing the occurrence of overcharging or undercharging due to delayed cutoff.

[0039] To better control the inflation volume, in this embodiment, the depth of the third channel is set to 0.5 mm, thereby slowing down the inflation speed. This ensures that even if the operator does not immediately activate the sealing sleeve upon completion of the inflation operation, the amount of high-pressure air entering the accumulator will not be excessive, allowing the operator additional reaction time. In other embodiments, the depth of the third channel can be increased to accelerate the inflation operation.

[0040] In another embodiment of this application, a third channel can be directly formed inside the sealing sleeve. The inner diameter of the sealing sleeve is adapted to the outer diameter of the inflation valve body 1, and the sealing ring abuts against the surface of the inflation valve body 1. Both ends of the third channel extend to the inner wall of the sealing sleeve to form a third air inlet and a third air outlet 21, both located between the two sealing rings. When the sealing sleeve is in the first position, it covers the second air inlet 12, and the second air inlet 12 can also be sealed by the two sealing rings. When the sealing sleeve is in the second position, it covers both the first air outlet 2111 and the second air inlet 12. At this time, the third air outlet 21 is connected to the first air outlet 111, and the second air inlet 12 is connected to the third air outlet 21. The third channel can also connect the first channel 111 and the second channel 121, thereby realizing the air replenishment operation of the accumulator. The specific arrangement of the third channel can be flexibly selected according to the convenience of the actual processing.

[0041] In another embodiment of this application, the sliding sealing assembly includes a sealing sleeve made of elastic material and a reinforcing steel ring. The sealing sleeve is fitted onto the inflation valve body 1. Since the sealing sleeve is made of elastic material, it inherently possesses sealing properties, enabling a seal at the contact point between the sealing sleeve and the inflation valve body 1. The reinforcing steel ring is embedded inside the sealing sleeve and is arranged circumferentially along the sealing sleeve. The portion between the reinforcing steel ring and the inflation valve body 1 forms a sealing part. While allowing for a certain amount of air passage in the sealing sleeve, the reinforcing steel ring strengthens the structural strength of the elastic sealing sleeve, reducing the possibility of deformation of the sealing sleeve due to the introduction of high-pressure air. A fine gap also exists between the sealing part of the sealing sleeve and the surface of the inflation valve body 1 to form a third channel connecting the first air outlet 2111 and the second air inlet 12. By moving the position of the sealing sleeve on the inflation valve body 1, the connection state between the third channel and the first air outlet 2111 and the second air inlet 12 is changed, allowing for rapid switching between the accumulator's air storage and replenishment states. In other embodiments, a third channel can be directly opened inside the sealing part of the sealing sleeve, with both ends of the third channel extending to the inner wall of the sealing sleeve to form a third air inlet and a third air outlet 21.

[0042] Furthermore, to make it easier for operators to determine the position switching of the closed sleeve 3, refer to Figure 1The inflation valve body 1 is also provided with a limiting flange 13. In this embodiment, the limiting flange 13 is specifically located at one end near the second air inlet 12. The limiting flange 13 can limit the movement of the sealing sleeve 3, and when the sealing sleeve 3 abuts against the limiting flange 13, the sealing sleeve is located in the first position. Regarding the limitation of the second position, the lengths of the inflation valve body 1 and the sealing sleeve can be set such that when the inflation valve body 1 is connected to the air supply source, and when the sealing sleeve moves to abut against the air supply source, the sealing sleeve is located in the second position. Alternatively, in another embodiment, two limiting flanges 13 can be provided. The first limiting flange 13 is located at one end near the first air outlet 2111, and the second limiting flange 13 is located at one end near the second air inlet 12. When the sealing sleeve abuts against the first limiting flange 13, the sealing sleeve is located in the first position; when the sealing sleeve abuts against the second limiting flange 13, the sealing sleeve is located in the second position.

[0043] Furthermore, to facilitate the connection of the inflation valve body 1 with the air supply source and the accumulator, refer to... Figure 1 A valve needle 2 is provided at one end of the inflation valve body 1 near the second air inlet 12. The valve needle 2 is inclined outward and downward from the inflation valve body 1 so that it can more easily open the accumulator opening. An air inlet is provided on the valve needle 2, which communicates with the second channel 121. Furthermore, to further improve the tightness of the connection between the valve needle 2 and the accumulator opening and reduce the possibility of leakage, a sealing nut 4 is threaded onto the valve needle 2. By inserting the valve needle 2 into the accumulator opening and tightening the sealing nut 4 towards the accumulator, the connection of the valve needle 2 can be sealed.

[0044] The inflation valve body 1 has a threaded connection part 14 at the end away from the valve needle 2. The threaded connection part 14 communicates with the first air outlet 2111, and a through hole is also provided on the end face of the threaded connection part 14 facing the air supply source, so that high-pressure air can enter the first channel 111. The threaded connection part 14 is threadedly engaged with the opening of the air supply source. Rotating the inflation valve body 1 can connect the inflation valve body 1 to the air supply port of the air supply source. The structure is simple and easy to use.

[0045] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0046] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A hydro-pneumatic suspension slide valve type inflator for a tracked vehicle, characterized by, It comprises: an inflation valve body (1) provided with a first passage (111) for communicating with a gas source and a second passage (121) for supplying gas to a pressure accumulator, one end of the first passage (111) extending to the side wall of the inflation valve body (1) to form a first gas outlet (11), and one end of the second passage (121) extending to the side wall of the inflation valve body (1) to form a second gas inlet (12); and a sliding sealing assembly movably sleeved on the inflation valve body (1), the sliding sealing assembly having a first position and a second position on the inflation valve body (1), when in the first position, the sliding sealing assembly seals the second gas inlet (12); when moved to the second position, the sliding sealing assembly communicates the first gas outlet (11) and the second gas inlet (12).

2. The oil-air suspension slide valve type inflator device for a tracked vehicle according to claim 1, wherein The sliding sealing assembly comprises: a sealing sleeve (3) sleeved on the inflation valve body (1), and the sealing sleeve (3) is made of hard material; a sealing ring (321) sleeved on the outer wall of the inflation valve body (1) and located in the sealing sleeve (3).

3. The oil-gas suspension sliding valve type inflation device of the tracked vehicle according to claim 2, characterized in that: an installation groove (32) is arranged on the inner wall of the sealing sleeve (3), and the sealing ring (321) is located in the installation groove (32).

4. The oil-gas suspension sliding valve type inflation device of the tracked vehicle according to claim 2, characterized in that: the inner diameter of the sealing sleeve (3) is greater than the outer diameter of the inflation valve body (1), so that a third passage (31) for communicating the first gas outlet (11) and the second gas inlet (12) is formed between the sealing sleeve (3) and the inflation valve body (1); or, the sealing sleeve (3) is further provided with a third passage (31) for communicating the first gas outlet (11) and the second gas inlet (12), both ends of the third passage (31) extending to the inner wall of the sealing sleeve (3) to form a third gas inlet and a third gas outlet.

5. The oil-air suspension spool valve type inflator device for a tracked vehicle according to claim 1, wherein The sliding sealing assembly comprises: a sealing sleeve (3) sleeved on the inflation valve body (1), and the sealing sleeve (3) is made of elastic material; and a reinforcing steel ring built in the sealing sleeve (3) to form a sealing part in the sealing sleeve (3) between the reinforcing steel ring and the inflation valve body (1).

6. The oil-gas suspension sliding valve type inflation device of the tracked vehicle according to claim 5, characterized in that: the inner wall of the sealing sleeve (3) is further provided with a third passage (31) for communicating the first gas outlet (11) and the second gas inlet (12); Alternatively, the sealing sleeve (3) is further provided with a third channel (31) for connecting the first gas outlet (11) and the second gas inlet (12), both ends of the third channel (31) extend to the inner wall of the sealing sleeve (3) to form a third gas inlet and a third gas outlet.

7. The oil-gas suspension sliding valve type inflation device of the tracked vehicle according to claim 2, characterized in that: The inflation valve body (1) is provided with a limiting flange (13), when the sealing sleeve (3) abuts against the limiting flange (13), the sealing sleeve (3) is located at the first position.

8. The oil-gas suspension sliding valve type inflation device of the tracked vehicle according to claim 1, characterized in that: The inflation valve body (1) is provided with a valve needle (2) at one end, the valve needle (2) is outwardly and downwardly inclined from the inflation valve body (1), the valve needle (2) is provided with a gas supplementing port (21), the gas supplementing port (21) is communicated with the second channel (121).

9. The oil-air suspension slide valve type inflator device for a tracked vehicle according to claim 8, wherein Further comprising: A sealing nut (4) is sleeved on the valve needle (2).

10. The oil-gas suspension sliding valve type inflation device of the tracked vehicle according to claim 8, characterized in that: The inflation valve body (1) is provided with a threaded connection part (14) at the end away from the valve needle (2), the threaded connection part (14) is communicated with the first gas outlet (11) and is used for connecting a gas supply source.

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