Air suspension system for lifting shaft

Abstract

The utility model provides an air suspension system for a lifting shaft, which relates to the field of air suspensions, and adopts the technical scheme that the air suspension system comprises an air storage cylinder, a lifting air bag and a bearing air bag, and further comprises an electromagnetic valve, an air inlet of the electromagnetic valve is communicated with the air storage cylinder, and a first air outlet of the electromagnetic valve is communicated with the lifting air bag; the load sensing valve comprises a valve body and a transverse swing rod set, the valve body is arranged on the portion, between the third axle and the fourth axle, of the frame, the transverse swing rod set can be connected with the third axle and the fourth axle, an air inlet of the valve body is communicated with the air storage cylinder, a second air outlet of the electromagnetic valve is communicated with a control air port of the valve body, and an air outlet of the valve body is communicated with the bearing air bag. The height of the bearing air bag can be accurately adjusted according to the height of the frame, so that the axle load of the whole vehicle is reasonably distributed.

Description

TECHNICAL FIELD

[0001] The utility model relates to air suspension field especially relates to an air suspension system for lifting axle. BACKGROUND

[0002] In order to ensure the bearing capacity and reduce the dead weight as far as possible, the third and fourth axles of the 10*4 five-axle large vehicle adopt plate spring suspension, and the fifth axle adopts the air suspension which can be lifted. The air suspension control system adopts the pressure regulating valve cooperating with the relay valve control system. The driver needs to get off the vehicle to adjust, and cannot monitor the axle load, which easily leads to the sudden change of the axle load of the lifting axle, causing the tire burst or suspension damage.

[0003] In the related art, a special vehicle air suspension control strategy is provided. The air cylinder is in communication with the air inlet of the first electromagnetic valve. The first air outlet of the first electromagnetic valve is in communication with the air inlet of the second electromagnetic valve. The second air outlet of the first electromagnetic valve is in communication with the left and right lifting air bags, respectively. The first air outlet of the second electromagnetic valve is in communication with the right bearing air bag and the right overflow valve, respectively. The second air outlet of the second electromagnetic valve is in communication with the left bearing air bag and the left overflow valve, respectively. The first switch is in signal connection with the first electromagnetic valve and is used for lifting axle lifting control. The second switch is in signal connection with the second electromagnetic valve and is used for height adjustment of the left and right bearing air bags. The air suspension system further comprises an air pressure sensor and an instrument. The air pressure sensor is used for measuring the air pressure value of the left or right bearing air bag. The instrument is in signal connection with the air pressure sensor, converts the air pressure value into the axle load of the lifting axle, and displays. In this technical solution, the first switch is turned on, the lifting axle is lifted, and the air suspension is switched from the bearing state to the lifting state. When the first switch is turned off, the air suspension is switched from the lifting state to the bearing state. When the air suspension is in the bearing state, the second switch adjusts the height of the bearing air bag and the axle load of the lifting axle through the second electromagnetic valve, realizes the bearing of the fifth axle in the bearing state, and makes the axle load of the whole vehicle evenly distributed.

[0004] In the above technical solution, when adjusting the height of the bearing air bag, the operator needs to determine whether to continue to ventilate according to his own experience combined with the axle load display on the cab instrument. When it is determined that ventilation is not needed, the operator operates the second switch to stop the ventilation of the bearing air bag, thereby controlling the height of the bearing air bag. However, since manual operation is needed according to the experience of the operator, the accuracy of the height control of the bearing air bag is affected by the operator. The adjustment of the axle load of the lifting axle (fifth axle) cannot be adapted to the axle load of the whole vehicle every time, which may cause the insufficient driving force of the third and fourth axles, the overload of the fifth axle, and even the air bag burst. UTILITY MODEL CONTENTS

[0005] In order to solve the technical problem that the air suspension in the prior art cannot accurately adjust the axle load of the lifting axle in the carrying state, the utility model provides an air suspension system for a lifting axle, which can accurately adjust the height of the carrying air bag according to the height of the vehicle frame, thereby realizing reasonable distribution of the axle load of the whole vehicle.

[0006] The utility model discloses a technical scheme that is adopted to solve the above technical problem: an air suspension system for a lifting axle, comprising an air cylinder, a lifting air bag and a carrying air bag, further comprising: an electromagnetic valve, the air inlet of the electromagnetic valve communicates with the air cylinder, and the first air outlet of the electromagnetic valve communicates with the lifting air bag; a load sensing valve, the load sensing valve comprises a valve body and a yaw lever group, the valve body is arranged on the vehicle frame between the third axle and the fourth axle, the yaw lever group can be connected with the third axle and the fourth axle respectively, the air inlet of the valve body communicates with the air cylinder, the second air outlet of the electromagnetic valve communicates with the control air port of the valve body, and the air outlet of the valve body communicates with the carrying air bag.

[0007] The utility model discloses that the yaw lever group of the load sensing valve mechanically senses the displacement of the vehicle frame in the carrying state, automatically adjusts the height of the air suspension carrying air bag according to the height of the vehicle frame, and then adjusts the height of the fifth axle, so that the axle load distribution of the whole vehicle is more balanced, and the adverse effects of manual adjustment are greatly reduced.

[0008] Further, the carrying air bag is provided with two air outlets, and the two carrying air bags respectively communicate with the corresponding air outlets of the load sensing valve.

[0009] Further, the carrying air bag is provided with two air outlets, and the two carrying air bags respectively communicate with the corresponding air outlets of the load sensing valve.

[0010] Further, the carrying air bag is provided with an overflow valve.

[0011] The utility model discloses that the overflow valve is arranged, can relieve pressure to the carrying air bag when the axle load mutation pressure surges, controls the pressure of the carrying air bag in the safety factor, guarantees the driving safety.

[0012] Further, the air inlet end of the carrying air bag is further provided with an air pressure sensor, the air pressure sensor is used for monitoring the pressure value of the carrying air bag, and the air pressure sensor can transmit the pressure value to the display table of the cab.

[0013] The utility model discloses that the air pressure sensor is arranged, can make the operating personnel real -time understanding the pressure condition of the carrying air bag, promotes the security.

[0014] Further, the valve body further comprises a mounting support, the mounting support can be detachably connected with the vehicle frame, and the yaw lever group is hinged with the axle housing of the third axle and the fourth axle respectively.

[0015] Further, the yaw bar group comprises a connecting rod one and a connecting rod two, the mounting end of the connecting rod one is capable of being hinged with the third axle, the connecting end of the connecting rod one is hinged with the connecting end of the connecting rod two, the mounting end of the connecting rod two is capable of being hinged with the fourth axle, the middle section of the connecting rod two is connected with a vertical rod, the other end of the vertical rod is connected with a horizontal rod, and the horizontal rod is connected with the valve body.

[0016] The utility model discloses a yaw bar group is divided into the hinged connecting rod one, connecting rod two and vertical rod, can sensitively transfer the height change of frame between third axle and fourth axle, makes the control of load air bag pressure more accurate, and further accurate control fifth axle's height makes axle load distribution more reasonable.

[0017] Further, the mounting end of the connecting rod one and the connecting rod two are connected with the mounting seat through the ball head pin, and the mounting seat is capable of being connected with the corresponding axle.

[0018] The utility model discloses a ball head pin can realize the free rotation of axle and corresponding connecting rod, avoids the connection reliability of the frame lateral movement influence corresponding connecting rod and axle, and is more suitable for complex road conditions.

[0019] Further, the vertical rod is provided with a connecting sleeve at both ends, the connecting sleeve comprises a connecting part one and a connecting part two, the connecting part one and the connecting part two are vertically arranged, the connecting part one is movably sleeved at both ends of the vertical rod along the axial direction of the vertical rod, and the connecting rod two and the horizontal rod all penetrate the corresponding connecting part two.

[0020] The utility model discloses a connecting sleeve is set up, and the horizontal rod angle is adjusted when factory and maintenance.

[0021] Further, the electromagnetic valve and the valve body are all provided with exhaust ports, the lifting air bag is connected with the exhaust port of the electromagnetic valve, and the load air bag is connected with the exhaust port of the load sensing valve.

[0022] Further, the utility model also includes a manual switch, the manual switch is electrically connected with the electromagnetic valve, the manual switch can be connected with the power supply, and the manual switch can be installed in the cab.

[0023] From the above technical scheme, the utility model has the following advantages:

[0024] This invention provides an air suspension system for lifting the axle. The system mechanically senses the displacement of the vehicle frame under load via a sway bar assembly connected to a load-sensing valve. It automatically adjusts the height of the air suspension load-bearing airbag based on the frame height, thereby adjusting the height of the fifth axle. This results in a more balanced axle load distribution and significantly reduces the adverse effects of manual adjustments. An overflow valve allows for depressurization of the load-bearing airbag during sudden pressure surges due to axle load changes, keeping the airbag pressure within a safe range and ensuring driving safety. A pressure sensor allows operators to monitor the airbag pressure in real time, further enhancing safety. The sway bar assembly, divided into hinged links one, two, and a vertical rod, sensitively transmits changes in frame height between the third and fourth axles, resulting in more accurate control of the load-bearing airbag pressure and, consequently, accurate control of the fifth axle height, leading to a more rational axle load distribution. Ball joints allow for free rotational connection between the axle and corresponding links, preventing lateral frame movement from affecting the connection reliability between the links and axles, and making it more adaptable to complex road conditions. A connecting sleeve facilitates adjustments to the crossbar angle during factory testing and maintenance. Attached Figure Description

[0025] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram illustrating a specific embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the installation structure of the load-sensing valve and the third and fourth bridges in a specific embodiment of this utility model.

[0028] Figure 3 This is a schematic diagram of the connecting sleeve in a specific embodiment of the present utility model.

[0029] In the diagram, 1. Air tank; 2. Load sensing valve; 201. Valve body; 202. Mounting support; 203. Horizontal bar; 204. Connecting sleeve; 2041. Connecting part one; 2042. Connecting part two; 205. Vertical bar; 206. Connecting rod two; 207. Connecting rod one; 208. Mounting seat; 209. Ball pin; 3. Solenoid valve; 4. Load-bearing airbag; 5. Air pressure sensor; 6. Overflow valve; 8. Lifting airbag; 9. Manual switch; 10. Third bridge; 12. Fourth bridge. Detailed Implementation

[0030] In order to make the purpose, characteristics and advantages of the utility model more obvious and easy to understand, the technical solutions in the utility model will be described clearly and completely in combination with the drawings in the specific embodiments below. Obviously, the embodiments described below are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the patent, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the patent.

[0031] As Figure 1 and Figure 2 shown, the specific embodiment provides an air suspension system for lifting shaft, including air cylinder 1, lifting air bag 8, bearing air bag 4, solenoid valve 3 and load sensing valve 2, the air inlet of solenoid valve 3 communicates with air cylinder 1, the first air outlet of solenoid valve 3 communicates with lifting air bag 8, the height of lifting air bag 8 can be controlled in lifting state through solenoid valve 3, and the lifting of fifth shaft is realized;The load sensing valve 2 includes valve body 201 and yaw bar group, the valve body 201 is arranged on the frame between the third bridge and the fourth bridge, the yaw bar group can be connected with the third bridge and the fourth bridge respectively, the air inlet of valve body 201 communicates with air cylinder 1, the second air outlet of solenoid valve 3 communicates with the control air port of valve body 201, and the air outlet of valve body 201 communicates with bearing air bag 4.

[0032] The specific embodiment mechanically senses the displacement of the frame in the bearing state through the yaw bar group of load sensing valve 2, automatically adjusts the height of the air suspension bearing air bag 4 of the fifth shaft according to the height of the frame, and then adjusts the height of the fifth shaft, so that the axle load distribution of the whole vehicle is more balanced, and the adverse effects of artificial adjustment are greatly reduced.

[0033] As Figure 1 shown, in the specific embodiment, the two bearing air bags 4 are respectively provided with two bearing air bags 4, and the two bearing air bags 4 respectively communicate with the corresponding air outlets of load sensing valve 2;By providing two bearing air bags 4, the fifth shaft can be lifted in a horizontal state, and tilting during lifting can be avoided.

[0034] As Figure 1 shown, in order to prevent the sudden change of axle load from causing the pressure of bearing air bag 4 to increase sharply and causing damage to bearing air bag 4 and gas path elements, in the specific embodiment, bearing air bag 4 is communicated with overflow valve 6;Overflow valve 6 is provided with the safety pressure of bearing air bag 4, when the axle load mutates and the pressure increases sharply, the pressure of bearing air bag 4 can be released, the pressure of the air bag is controlled within the safety factor, and the driving safety is ensured.

[0035] As Figure 1As shown, due to the inherent strength limitations of the airbag 4 and the need to check and calibrate the air pressure, in this specific embodiment, a pressure sensor 5 is also provided at the air inlet end of the airbag 4. The pressure sensor 5 is used to monitor the pressure value of the airbag 4 and can transmit the pressure value to the display in the driver's cab.

[0036] like Figures 1 to 3 As shown, in order to accurately reverse the change in frame height, in this specific embodiment, the valve body 201 further includes a mounting bracket 202, which can be detachably connected to the frame by bolts. The sway bar assembly is hinged to the axle housings of the third axle 10 and the fourth axle 12 respectively. Specifically, the sway bar assembly includes a first connecting rod 207 and a second connecting rod 206. The mounting end of the first connecting rod 207 can be hinged to the third axle, and the connecting end of the first connecting rod 207 and the connecting end of the second connecting rod 206 are connected by a pin. The connecting rod 206 is hinged, with its mounting end hinged to the fourth axle. A vertical rod 205 is connected to the middle section of the connecting rod 206, and a horizontal rod 203 is connected to the other end of the vertical rod 205. The horizontal rod 203 is connected to the valve body 201. By dividing the sway bar into hinged connecting rod 207, connecting rod 206, and vertical rod 205, the height change of the frame between the third axle 10 and the fourth axle 12 can be sensitively transmitted, making the pressure control of the load-bearing airbag 4 more accurate. This, in turn, allows for more accurate control of the height of the fifth axle, ensuring smoother axle movement. The load distribution is more reasonable; furthermore, the vertical rod 205 is provided with connecting sleeves 204 at both ends. The connecting sleeve 204 includes a first connecting part 2041 and a second connecting part 2042. The first connecting part 2041 and the second connecting part 2042 are arranged perpendicularly. The first connecting part 2041 is movably sleeved on both ends of the vertical rod 205 along the axial direction of the vertical rod 205. The second connecting rod 206 and the horizontal rod 203 both pass through the corresponding second connecting part 2042. By using the connecting sleeve 204, it is possible to... During vehicle manufacturing and after-sales maintenance, the angle of the crossbar 203 in the sway bar assembly is adjusted according to the vehicle condition to ensure that the axle load distribution of the entire vehicle meets the requirements. Furthermore, the mounting ends of the first connecting rod 207 and the second connecting rod 206 are both connected to the mounting base 208 via ball joint pins 209. The mounting base 208 can be welded to the corresponding axle. The ball joint pins 209 enable free rotational connection between the axle and the corresponding connecting rod, preventing lateral movement of the frame from affecting the connection reliability between the corresponding connecting rod and the axle, and making it more adaptable to complex road conditions.

[0037] To facilitate the deflation of the carrying airbag 4 and the lifting airbag 8, both the solenoid valve 3 and the valve body 201 are provided with exhaust ports. The lifting airbag 8 is connected to the exhaust port of the solenoid valve 3, and the carrying airbag 4 is connected to the exhaust port of the load-sensing valve 2.

[0038] like Figure 1As shown, in order to facilitate the driver to operate, the specific embodiment further includes a manual switch 9, the manual switch 9 is electrically connected with the electromagnetic valve 3, the manual switch 9 can be connected to the power supply, the manual switch 9 can be installed in the cab, the electromagnetic valve 3 is a two-position five-way electromagnetic valve 3; when the manual switch 9 is turned on, the electromagnetic valve 3 realizes the conduction of the air cylinder 1 and the lifting air bag 8, realizes the lifting of the fifth axle in the lifting state, when the whole vehicle is loaded, it is needed to switch to the bearing state, the manual switch 9 is turned off, the electromagnetic valve 3 no longer makes the air cylinder 1 and the lifting air bag 8 conduct, the electromagnetic valve 3 makes the air cylinder 1 and the load sensing valve 2 conduct, the air port is ventilated, and the load sensing valve 2 enters the height adjustment state.

[0039] The working process of the specific embodiment is as follows:

[0040] When the whole vehicle is unloaded, the manual switch 9 is operated to enter the lifting state, at this time, the gas in the air cylinder 1 enters the lifting cylinder through the gas outlet of the electromagnetic valve 3, the lifting air bag 8 is inflated, the fifth axle is lifted, the friction area of the tire and the ground is reduced, the rolling resistance is reduced, and the energy is saved; when the whole vehicle is loaded, the frame height is lowered, the swing rod group is swung, in order to balance the axle load of the whole vehicle, the manual switch 9 is operated to enter the bearing state, at this time, the lifting air bag 8 is deflated through the exhaust port of the electromagnetic valve 3, the height is lowered, the gas in the air cylinder 1 enters the control gas port of the load sensing valve 2 through the electromagnetic valve 3, controls the output gas pressure of the load sensing valve 2, and enters the bearing air bag 4 through the load sensing valve 2, so that the gas pressure of the bearing air bag 4 is increased, the height of the fifth axle is lifted, and the angle of the cross rod 203 is restored to the degree set at the factory or the position set during maintenance.

[0041] From the above specific embodiment, it can be seen that the utility model has the following beneficial effects:

[0042] 1. The displacement of the frame in the bearing state is mechanically perceived by the swing rod group of the load sensing valve 2, the height of the air suspension bearing air bag 4 is automatically adjusted according to the frame height, and then the height of the fifth axle is adjusted, so that the axle load distribution of the whole vehicle is more balanced, and the adverse effects of manual adjustment are greatly reduced; by arranging the overflow valve 6, the pressure of the bearing air bag 4 can be relieved when the axle load suddenly increases, the pressure of the bearing air bag 4 is controlled within a safety factor, and the driving safety is ensured;

[0043] 2. By arranging the air pressure sensor 5, the operator can know the pressure condition of the bearing air bag 4 in real time, and the safety is improved;

[0044] 3. By dividing the swing rod group into the articulated connecting rod 207, the connecting rod 206 and the vertical rod 205, the height change of the frame between the third axle 10 and the fourth axle 12 can be sensitively transmitted, the pressure control of the bearing air bag 4 is more accurate, and then the height of the fifth axle is accurately controlled, so that the axle load distribution is more reasonable;

[0045] 4、Through the ball head pin 209, the free rotation connection between the axle and the corresponding connecting rod can be realized, the connecting reliability of the corresponding connecting rod and the axle is avoided from being affected by the lateral movement of the frame, and the complex road conditions are more adapted;

[0046] 5、Through the setting of the connecting sleeve 204, the angle of the cross rod 203 is adjusted during the factory delivery and the maintenance.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will accord with the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air suspension system for a lifting shaft, comprising an air reservoir (1), a lifting airbag (8), and a load-bearing airbag (4), characterized in that, Also includes: Solenoid valve (3), the air inlet of the solenoid valve (3) is connected to the air storage cylinder (1), and the first air outlet of the solenoid valve (3) is connected to the lifting air bag (8). The load sensing valve (2) includes a valve body (201) and a sway bar assembly. The valve body (201) is mounted on the frame between the third axle and the fourth axle. The sway bar assembly can be connected to the third axle and the fourth axle respectively. The air inlet of the valve body (201) is connected to the air reservoir (1). The second air outlet of the solenoid valve (3) is connected to the control air outlet of the valve body (201). The air outlet of the valve body (201) is connected to the load-bearing airbag (4).

2. The air suspension system for the lift shaft as described in claim 1, characterized in that, The load-sensing valve (2) has two load-bearing airbags (4) at its outlet, and the two load-bearing airbags (4) are respectively connected to the corresponding outlets of the load-sensing valve (2).

3. The air suspension system for the lift shaft as described in claim 2, characterized in that, The airbag (4) is connected to an overflow valve (6).

4. The air suspension system for the lift shaft as described in claim 3, characterized in that, The air intake end of the airbag (4) is also provided with a pressure sensor (5), which is used to monitor the pressure value of the airbag (4) and can transmit the pressure value to the display in the driver's cab.

5. The air suspension system for the lift shaft as described in any one of claims 1-4, characterized in that, The valve body (201) also includes a mounting bracket (202) which can be detachably connected to the frame, and the sway bar assembly is hinged to the axle housings of the third and fourth axles respectively.

6. The air suspension system for the lift shaft as described in claim 5, characterized in that, The horizontal swing arm assembly includes a first connecting rod (207) and a second connecting rod (206). The mounting end of the first connecting rod (207) can be hinged to the third bridge. The connecting end of the first connecting rod (207) is hinged to the connecting end of the second connecting rod (206). The mounting end of the second connecting rod (206) can be hinged to the fourth bridge. A vertical rod (205) is connected to the middle section of the second connecting rod (206). A horizontal rod (203) is connected to the other end of the vertical rod (205). The horizontal rod (203) is connected to the valve body (201).

7. The air suspension system for the lift shaft as described in claim 6, characterized in that, The mounting ends of both the first connecting rod (207) and the second connecting rod (206) are connected to the mounting base (208) via ball joint pins (209), and the mounting base (208) can be connected to the corresponding axle.

8. The air suspension system for the lift shaft as described in claim 7, characterized in that, The vertical rod (205) is provided with connecting sleeves (204) at both ends. The connecting sleeve (204) includes a connecting part one (2041) and a connecting part two (2042). The connecting part one (2041) and the connecting part two (2042) are arranged perpendicularly to each other. The two connecting parts one (2041) are respectively movably sleeved on both ends of the vertical rod (205) along the axial direction of the vertical rod (205). The connecting rod two (206) and the horizontal rod (203) both pass through the corresponding connecting parts two (2042).

9. The air suspension system for the lift shaft as described in claim 5, characterized in that, Both the solenoid valve (3) and the valve body (201) are provided with exhaust ports. The lifting airbag (8) is connected to the exhaust port of the solenoid valve (3), and the bearing airbag (4) is connected to the exhaust port of the load sensing valve (2).

10. The air suspension system for the lift shaft as described in claim 9, characterized in that, It also includes a manual switch (9), which is electrically connected to the solenoid valve (3), and the manual switch (9) can be powered on and can be installed in the cab.

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