Stay wire connecting rod inflating device

Abstract

The utility model discloses a stay wire connecting rod inflating device which comprises an air supply unit, a height control module and an air purification module, the air supply unit comprises an integrated air pump box, a piston sleeve, a piston end, an integrated reel, a furling spring, an eccentric wheel connecting rod mechanism and a high-strength stay wire rope, and the integrated air pump box is fixed at the end of an air spring; one end of the high-strength pull rope is fixed to a movable part of the air spring, the other end of the high-strength pull rope is wound on the integrated reel, one end of the eccentric wheel connecting rod mechanism is hinged to an eccentric wheel of the integrated reel, the other end of the eccentric wheel connecting rod mechanism is hinged to the piston end, and the piston end is sleeved with the piston sleeve and can reciprocate in the integrated air pump box. The air suspension system is integrated and optimized, repeated configuration of parts is reduced, occupied space is reduced, a pure mechanical control mode is adopted, a height sensor and related electronic elements are not needed, the structure is simplified, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive air suspension system technology, and in particular to a cable linkage air inflator device. Background Technology

[0002] In the automotive field, air suspension systems are widely used. They mainly consist of an air supply system, sensors, and an electronic control unit (ECU). The air supply system includes an air compressor, distribution valve, air tank, and air lines, responsible for inflating and deflating the air springs to adjust suspension travel. Various sensors detect vehicle status and feed back signals to the ECU, creating a closed-loop information system. The ECU precisely controls the air supply system and shock absorbers based on feedback signals and preset strategies, adjusting vehicle height, suspension stiffness, and damping.

[0003] However, existing air suspension system inflation devices have many drawbacks. Frequent start-stop cycles of the air compressor generate significant noise, affecting ride comfort and reducing its lifespan; the accuracy of sensor data acquisition is greatly affected by environmental factors. Under extreme temperature and humidity conditions, data errors can lead to ECU control deviations, affecting the adjustment of vehicle height, suspension stiffness, and damping, thereby threatening vehicle stability and safety; existing system control strategies lack flexibility and struggle to quickly adapt to complex road conditions, limiting the performance of the air suspension system.

[0004] Based on this, a pull-wire linkage air pumping device is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a pull-wire linkage air pump device to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pull-cord linkage air pump device includes an air supply unit, a height control module, and a gas purification module. The air supply unit includes an integrated air pump box, a piston sleeve, a piston end, an integrated winding wheel, a winding spring, an eccentric wheel linkage mechanism, and a high-strength pull rope. The integrated air pump box is fixed to the air spring end. One end of the high-strength pull rope is fixed to the movable part of the air spring, and the other end is wound around the integrated winding wheel. One end of the eccentric wheel linkage mechanism is hinged to the eccentric wheel of the integrated winding wheel, and the other end is hinged to the piston end. The piston sleeve is fitted onto the piston end and can reciprocate within the integrated air pump box.

[0008] The height control module includes a sealed piston sleeve and a linear driven end. The sealed piston sleeve and the linear driven end are connected by a fixing pin, and the integrated winding wheel is connected to the linear driven end by a threaded drive.

[0009] The gas purification module includes a filter core, a one-way valve, and a regulating valve. The filter core is connected to the gas supply unit and the height control module. The one-way valve is located in the gas path, and the regulating valve is connected to an air spring.

[0010] Preferably, the integrated air pump box has two independent air passages, and the sealing piston sleeve has through holes corresponding to the air passages. The diameter of the through holes is larger than the diameter of the air passage holes, and the two are circumferentially offset.

[0011] Preferably, the integrated winding reel is connected to the integrated air pump box via a deep groove ball bearing and a retaining ring, with the deep groove ball bearing positioned between the integrated air pump box and the retaining ring.

[0012] Preferably, the linear driven end of the height control module is connected to the sealing piston sleeve by two fixing pins that are misaligned at ninety degrees.

[0013] Preferably, the one-way valves of the gas purification module are respectively disposed in the exhaust gas path and the replenishment gas path, and the regulating valve includes a first gas valve connected to the exhaust gas path and a second gas valve connected to the replenishment gas path.

[0014] Preferably, the air supply unit, height control module, and gas purification module are integrated into the end structure of the air spring.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] 1. This application employs an integrated and optimized air suspension system, reducing redundant component configurations, lowering space requirements, and reducing the cost of equipment such as distribution valves and air tanks. Simultaneously, it utilizes mechanical energy to replace the electronic air pump, eliminating electronic components and further reducing costs. Furthermore, the use of a purely mechanical control method eliminates the need for height sensors and related electronic components, simplifying the structure and reducing costs.

[0017] 2. This application improves the reliability of the entire system by dividing the linked air suspension system into four independent subsystems. A single failure does not affect other systems. By eliminating the height adjustment function, the control deviation caused by the sensor being affected by environmental factors is avoided. This allows the air suspension system to stably supply air to the air springs in various environments, ensuring the stability and safety of the vehicle. Attached Figure Description

[0018] Figure 1 A schematic diagram of the connection of the gas purification module according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram of the connection of the eccentric wheel linkage mechanism according to an embodiment of the present invention is shown;

[0020] Figure 3 A partial cross-sectional structural diagram of an air pumping device provided according to an embodiment of the present invention is shown.

[0021] Legend:

[0022] 1. Air supply unit; 2. Height control module; 3. Gas purification module; 11. Integrated air pump box; 12. Piston sleeve; 13. Piston end; 14. Integrated winding reel; 15. Winding spring; 16. Eccentric wheel linkage mechanism; 17. High-strength pull rope; 21. Sealed piston sleeve; 22. Linear driven end; 23. Fixing pin; 31. Filter core; 32. One-way valve; 33. Regulating valve; 141. Eccentric wheel; 142. Deep groove ball bearing; 143. Snap ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-3 This utility model provides a technical solution:

[0025] The air supply unit includes an air supply unit 1, a height control module 2, and a gas purification module 3. The air supply unit 1 includes an integrated air pump box 11, a piston sleeve 12, a piston end 13, an integrated winding wheel 14, a winding spring 15, an eccentric wheel linkage mechanism 16, and a high-strength pull rope 17. The integrated air pump box 11 is fixed to the end of the air spring. One end of the high-strength pull rope 17 is fixed to the movable part of the air spring, and the other end is wound around the integrated winding wheel 14. One end of the eccentric wheel linkage mechanism 16 is hinged to the eccentric wheel 141 of the integrated winding wheel 14, and the other end is hinged to the piston end 13. The piston sleeve 12 is fitted on the piston end 13 and can reciprocate within the integrated air pump box 11. The air supply unit 1 converts the up-and-down swaying motion of the air spring into the rotational motion of the integrated winding wheel 14 through the high-strength pull rope 17. When the air spring is stretched, the unsprung moving part drives the high-strength pull rope 17 to pull the integrated winding wheel 14 to rotate clockwise. The eccentric wheel 141 drives the piston end 13 to move to the left through the eccentric wheel linkage mechanism 16, and the piston sleeve 12 compresses air in the integrated air pump box 11. When the air spring is compressed, the coiling spring 15 drives the integrated winding wheel 14 to rotate counterclockwise, and the piston sleeve 12 moves to the right to draw in air. This process uses the vehicle's kinetic energy to achieve air supply without a power source, eliminating the need for an electronic air pump.

[0026] The height control module 2 includes a sealing piston sleeve 21 and a linear driven end 22. The sealing piston sleeve 21 and the linear driven end 22 are connected by a fixing pin 23, and the integrated winding wheel 14 is connected to the linear driven end 22 via a threaded drive. The height control module 2 realizes the axial movement of the sealing piston sleeve 21 through the threaded drive. When the integrated winding wheel 14 rotates, its external thread engages with the internal thread of the linear driven end 22, causing the linear driven end 22 to move along the axis of the integrated air pump box 11, driving the sealing piston sleeve 21 to move synchronously. The through hole on the sealing piston sleeve 21 is offset by 90 degrees from the air passage hole (1mm in diameter) in the integrated air pump box 11. When the air spring is stretched, the sealing piston sleeve 21 moves to the left, aligning the left through hole with the exhaust air passage, and the right through hole closes the replenishment air passage; when the air spring is compressed, the sealing piston sleeve 21 moves to the right, aligning the right through hole with the replenishment air passage, and the left through hole closes the exhaust air passage, ensuring that only one air passage is open at any given time.

[0027] The gas purification module 3 includes a filter element 31, a one-way valve 32, and a regulating valve 33. The filter element 31 is connected to the air supply unit 1 and the height control module 2 via the air path. The one-way valve 32 is located in the air path, and the regulating valve 33 is connected to the air spring. The filter element 31 adopts a folded non-woven fabric structure with a filtration accuracy of 5μm, which can effectively intercept dust, water vapor, and oil mist in the air and prevent corrosion inside the air pump. The one-way valve 32 is a spring-loaded structure. The inlet one-way valve 32 only allows external air to flow into the integrated air pump box 11, and the exhaust one-way valve 32 only allows gas inside the air spring to be discharged. The regulating valve 33 controls the opening and closing of the air path by setting pressure thresholds (such as P1=0.5MPa, P2=0.3MPa). When the air pressure inside the air spring exceeds P1, the first valve automatically opens to exhaust; when it is lower than P2, the second valve automatically opens to replenish air, realizing closed-loop pressure control.

[0028] Specifically, such as Figure 3 As shown, the integrated air pump box 11 has two independent air passages. The sealing piston sleeve 21 has through holes corresponding to the air passages. The diameter of the through holes is larger than the diameter of the air passage holes, and the two are circumferentially offset.

[0029] Specifically, such as Figure 3 As shown, the integrated winding reel 14 is connected to the integrated air pump housing 11 via a deep groove ball bearing 142 and a retaining ring 143. The deep groove ball bearing 142 is positioned between the integrated air pump housing 11 and the retaining ring 143. The outer ring of the deep groove ball bearing 142 is embedded in the stepped structure of the integrated air pump housing 11, and the inner ring is interference-fitted with the journal of the integrated winding reel 14. The retaining ring 143 (an elastic retaining ring for the shaft) is embedded in the retaining groove of the integrated air pump housing 11, restricting the axial movement of the integrated winding reel 14 and ensuring that it can only rotate circumferentially.

[0030] Specifically, such as Figure 3As shown, the linear driven end 22 of the height control module 2 is connected to the sealing piston sleeve 21 by two 90-degree offset fixing pins 23. The two fixing pins 23 pass through the pin holes of the sealing piston sleeve 21 and the linear driven end 22 at a 90-degree angle, and are fixed by an interference fit to prevent relative circumferential rotation. The guide groove of the linear driven end 22 slides in engagement with the guide strip on the inner wall of the integrated air pump box 11, further restricting its rotation and ensuring that it moves only along the axis.

[0031] Specifically, such as Figure 3 As shown, the one-way valves 32 of the gas purification module 3 are respectively installed in the exhaust gas path and the replenishment gas path, and the regulating valve 33 includes a first valve connected to the exhaust gas path and a second valve connected to the replenishment gas path.

[0032] Specifically, such as Figure 3 As shown, the air supply unit 1, height control module 2, and gas purification module 3 are integrated into the end structure of the air spring. These components are bolted together inside the air spring end, forming a purely mechanical system independent of the ECU. Compared to traditional air suspension systems, this eliminates the need for a distribution valve, air tank, sensors, and complex piping, reducing costs by approximately 40%. Furthermore, a failure in a single module does not affect the operation of other air springs, improving system reliability. Figure 3 The diagram shows a cross-sectional view of the height control module 2 and the air supply unit 1, illustrating the through hole of the sealed piston sleeve 21, the air passage hole inside the integrated air pump box 11, the threaded transmission structure and guiding relationship of the integrated winding wheel 14, and the guide slide is a raised structure on the inner wall of the integrated air pump box 11, which forms a T-shaped sliding pair with the guide groove of the linear driven end 22 to ensure the accuracy of linear motion.

[0033] In summary, the air-pressuring device for the pull-wire linkage provided in this embodiment includes an air replenishment process and an air exhaust process during operation:

[0034] Inflation process: When the car is bumpy, if the air spring shortens (its height is lower than the set value), the cable connected to the air spring will drive the winding wheel to rotate. The eccentric wheel 141 on the winding wheel will rotate accordingly, driving the piston to move back and forth in the air pump box via the connecting rod. The piston draws in outside air, compresses it, and sends it to the air spring, allowing the air spring to return to the appropriate height. At the same time, the sealed piston sleeve 21 in the height control module 2 will move, opening the air supply path and closing the exhaust path.

[0035] Exhaust process: When the air spring is stretched (height higher than the set value), the cable will also drive the winding wheel to rotate, but in the opposite direction to when replenishing air. The eccentric wheel 141 also drives the piston to move, but at this time the sealed piston sleeve 21 in the height control module 2 moves, opening the exhaust air passage. The air in the air spring is then discharged to the outside through the exhaust air passage and the purification module. Exhaust is completed automatically by utilizing the air pressure difference inside and outside the air spring.

[0036] This device integrates some components of the air suspension system, reducing the number of parts, taking up less space, and saving money on equipment such as distribution valves and air tanks. It uses the mechanical energy of the car's bumps to supply air, eliminating the need for electronic air pumps and those prone to failure electronic components, thus lowering costs. Furthermore, it divides the entire system into four independent subsystems; if one subsystem fails, the others can still function normally, making the vehicle more reliable. In addition, it uses a purely mechanical method to control the air supply, eliminating the need for electronic components such as height sensors, resulting in a simpler structure and lower costs.

[0037] The above description of the embodiments enables those skilled in the art to make or use the present invention. 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 the present invention. Therefore, the present invention 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 disclosed herein.

Claims

1. A pull-wire linkage air pumping device, comprising an air supply unit (1), a height control module (2), and a gas purification module (3), characterized in that, The air supply unit (1) includes an integrated air pump box (11), a piston sleeve (12), a piston end (13), an integrated winding wheel (14), a winding spring (15), an eccentric wheel linkage mechanism (16), and a high-strength pull rope (17). The integrated air pump box (11) is fixed to the air spring end. One end of the high-strength pull rope (17) is fixed to the movable part of the air spring, and the other end is wound around the integrated winding wheel (14). One end of the eccentric wheel linkage mechanism (16) is hinged to the eccentric wheel (141) of the integrated winding wheel (14), and the other end is hinged to the piston end (13). The piston sleeve (12) is fitted on the piston end (13) and can reciprocate inside the integrated air pump box (11). The height control module (2) includes a sealing piston sleeve (21) and a linear driven end (22). The sealing piston sleeve (21) and the linear driven end (22) are connected by a fixing pin (23). The integrated winding wheel (14) and the linear driven end (22) are connected by a threaded drive. The gas purification module (3) includes a filter core (31), a one-way valve (32) and a regulating valve (33). The filter core (31) is connected to the gas supply unit (1) and the height control module (2) via the gas path. The one-way valve (32) is located in the gas path. The regulating valve (33) is connected to the air spring.

2. The air pumping device for the pull-wire connecting rod according to claim 1, characterized in that, The integrated air pump box (11) is provided with two independent air passages. The sealing piston sleeve (21) is provided with through holes corresponding to the air passages. The diameter of the through holes is larger than the diameter of the air passage holes, and the two are arranged in a circumferentially offset manner.

3. The air pumping device for the pull-wire linkage according to claim 1, characterized in that, The integrated winding reel (14) is connected to the integrated air pump box (11) via a deep groove ball bearing (142) and a retaining ring (143), with the deep groove ball bearing (142) positioned between the integrated air pump box (11) and the retaining ring (143).

4. The air pumping device for the pull-wire connecting rod according to claim 1, characterized in that, The linear driven end (22) of the height control module (2) is connected to the sealing piston sleeve (21) by two fixed pins (23) that are assembled at ninety degrees off.

5. The air pumping device for the pull-wire connecting rod according to claim 1, characterized in that, The one-way valves (32) of the gas purification module (3) are respectively installed in the exhaust gas path and the replenishment gas path, and the regulating valve (33) includes a first valve connected to the exhaust gas path and a second valve connected to the replenishment gas path.

6. The air pumping device for the pull-wire connecting rod according to claim 1, characterized in that, The air supply unit (1), height control module (2) and gas purification module (3) are integrated into the end structure of the air spring.

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