Left and right interconnected suspension of drive axle

Abstract

The invention relates to the technical field of truck suspensions, in particular to a drive axle left-right interconnection suspension which comprises a damping cavity, a damping cavity piston rod, a piston, an oil conveying pipe, a molecular spring hydraulic cavity, a molecular spring piston rod, a sealing ring, a molecular spring cavity and a molecular spring. The damping cavity is filled with hydraulic oil, and the damping cavity piston rod drives the piston to reciprocate in the damping cavity to generate damping force. The top of the damping cavity piston rod is connected with a frame; the oil conveying pipe is used for transmitting pressure of the hydraulic oil cavity to the molecular spring hydraulic cavity; when the damping cavity piston rod moves downwards, the molecular spring piston rod moves into the molecular spring cavity; on the contrary, the molecular spring piston rod moves into the molecular spring hydraulic cavity under the action of the elastic restoring force of the molecular spring. The molecular spring is used for the automobile suspension, the molecular spring can achieve left-right interconnection of suspension elastic elements, and therefore a new structure is provided for the automobile interconnection suspension.

Description

Technical Field

[0001] The invention relates to the technical field of truck suspensions, and in particular to a left-right interconnected suspension of a drive axle. Background Art

[0002] In the prior art, it is known that the rear axle of a truck is generally a leaf spring balanced suspension. Since the rigid leaf spring will immediately perform elastic recovery after a slight deformation, the rapid rebound characteristic means that even when driving on a slightly uneven road, its vibration can be continuously fed back to the vehicle; in addition, the leaf spring and the wheel axle of the vehicle body are arranged perpendicular to each other, resulting in a limited contact area between the two. All the weight of the vehicle body carried by the leaf spring is transmitted through the contact surface, resulting in excessive local pressure, which easily causes the risk of deformation, bending, or even fracture of the wheel axle. In order to overcome these shortcomings of the leaf spring balanced suspension, some trucks use air spring rear suspensions. However, due to the small height change of the rear suspension using air springs, when a heavy truck with a single-axle-driven double rear axle structure is unloaded, if it is driving on an uneven road, once the non-driving wheel of the rear axle falls on the convex part and the driving wheel falls on the concave part, the driving wheel often has insufficient driving force and cannot pass through the concave part. Summary of the invention

[0003] In order to solve the above problems, the present invention designs a left and right interconnected suspension of a drive axle, which adopts an elastic unit composed of a molecular spring and water in the energy storage structure. When facing insufficient driving force, the molecular spring can produce a height change higher than that of the air spring by releasing the water absorbed by the material. Therefore, the rear suspension using the molecular spring can improve the passability.

[0004] In order to solve the above-mentioned technical problems, the present invention provides a left and right interconnected suspension of a driving axle, including a damping vibration reduction component and an energy storage structure. The energy storage structure is composed of a molecular spring cavity, a molecular spring filled in the molecular spring cavity, a molecular spring piston rod and a molecular spring hydraulic oil cavity. A molecular spring hydraulic oil cavity is symmetrically arranged at each of the left and right ends of the molecular spring cavity. The molecular spring hydraulic oil cavity is connected to the molecular spring cavity and is detachably connected to its side wall by bolts. The molecular spring piston rod is piston-connected in the molecular spring hydraulic oil cavity. The molecular spring hydraulic oil cavities on the left and right sides are each connected to a damping vibration reduction component through an oil pipeline. The damping vibration reduction component is filled with hydraulic oil and its upper end is connected to the frame.

[0005] Further: the damping vibration reduction assembly is composed of a damping chamber, a damping chamber piston rod and a piston. The lower end of the damping chamber is connected to the oil pipe, the hydraulic oil is filled in the damping chamber, the upper end of the damping chamber piston rod is connected to the frame, the lower end of the damping chamber piston rod extends into the damping chamber and is connected to the piston, and the damping chamber piston rod drives the piston to reciprocate in the damping chamber to generate the damping force required by the suspension.

[0006] Furthermore: an external connecting hole is arranged at the bottom of the damping chamber, a central through hole is arranged at the top of the damping chamber for the damping chamber piston rod to extend into, a first sealing groove is arranged on the inner wall of the central through hole, an external threaded joint structure connected to the oil pipeline is arranged on the side wall at the lower end of the damping chamber, and the damping chamber piston rod and the central through hole are sealed by a first sealing ring arranged in the first sealing groove.

[0007] Furthermore: the piston is provided with a damping chamber piston normally open hole and a damping chamber piston normally closed hole. The piston reciprocates in the damping chamber along with the damping chamber piston rod. During the reciprocating motion, the hydraulic oil flows through the piston normally open hole and the damping chamber piston normally closed hole whose opening angle is controlled by the speed of the sprung mass, which will generate the required damping force for the suspension. The upper and lower outlets of the damping chamber piston normally closed hole are respectively covered by the upper and lower damping adjustment plates.

[0008] Furthermore: the top of the damping chamber piston rod is provided with a thread for connecting to the frame, and the bottom is provided with a journal and a thread for fixing the piston and the upper and lower damping adjustment plates.

[0009] Furthermore: the molecular spring hydraulic chamber is a stepped cylindrical shell with an external thread on the top, the external thread on the top of the molecular spring hydraulic chamber is used to connect the oil pipeline, a second sealing groove is provided on the inner wall of the central through hole at the bottom of the molecular spring hydraulic chamber, and the molecular spring piston rod and the central through hole at the bottom of the molecular spring hydraulic chamber are sealed by a second sealing ring arranged in the second sealing groove.

[0010] Furthermore: the molecular spring chamber is a cylindrical cavity with central through holes at both ends and threaded holes evenly distributed on the edge. The cavity of the molecular spring chamber is filled with molecular springs and water. A third sealing groove is provided on the inner wall of the central through holes at both ends. The molecular spring piston rod and the central through hole at the end of the molecular spring chamber are sealed by a third sealing ring arranged in the third sealing groove.

[0011] Furthermore: a cylindrical buffer water collecting chamber is also fixed at the bottom of the molecular spring chamber, a buffer liquid inlet and outlet is opened at the top of the buffer water collecting chamber, a water inlet and outlet is opened at the bottom of the molecular spring chamber relative to the buffer liquid inlet and outlet, a pressure protection valve body is vertically fixed between the upper and lower walls of the buffer water collecting chamber, the upper end of the pressure protection valve body is facing the buffer liquid inlet and outlet, the pressure protection valve body is connected with the water inlet and outlet at the bottom of the molecular spring chamber through the buffer liquid inlet and outlet, the pressure protection valve body is composed of a filter cartridge section and a guide cylinder section connected together up and down, the filter cartridge section and the guide cylinder section are piston-type connected with valve cores up and down, the valve core is connected to the bottom of the buffer water collecting chamber through a spring, and there is a gap between the outer wall of the pressure protection valve body and the inner wall of the buffer water collecting chamber.

[0012] Furthermore: an annular piston plate is slidably connected up and down between the outer wall of the pressure protection valve body and the inner wall of the buffer water collecting chamber, the annular piston plate is connected to the first push-pull rod, and the valve core is also connected to the pull rod. The bottom of the buffer water collecting chamber is respectively provided with a first guide hole and a second guide hole relative to the positions of the first push-pull rod and the pull rod. One end of the first push-pull rod extends into the buffer water collecting chamber along the first guide hole and is connected to the annular piston plate, and one end of the pull rod enters the pressure protection valve body along the second guide hole and is connected to the valve core.

[0013] After adopting the above structure, the beneficial effects of the present invention are as follows: The present invention adopts an elastic unit composed of a molecular spring and water in the energy storage structure. When faced with insufficient driving force, the molecular spring can produce a height change higher than that of an air spring by releasing water absorbed by the material. Therefore, the rear suspension using the molecular spring can improve passability.

[0014] After the present invention adopts the above structure, the shock absorber on one side of the vehicle can affect the shock absorber on the other side as little as possible during compression, thereby achieving the purpose of improving comfort.

[0015] After the present invention adopts the above structure, when turning, under the action of centrifugal force, the outer shock absorber of the interconnected suspension using molecular springs is compressed, resulting in a reduction in the volume of water in the molecular spring cavity, so the height of the inner shock absorber can be reduced synchronously, thereby reducing the roll angle and improving the stability during turning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 This is the structural diagram of the damping chamber.

[0019] Figure 3 This is the structural diagram of the damping chamber piston.

[0020] Figure 4 This is the structural diagram of the molecular spring hydraulic chamber.

[0021] Figure 5 This is the structural diagram of the molecular spring cavity.

[0022] Figure 6 This is the internal structure diagram of the buffer water collection chamber.

[0023] In the figure: 1 is a molecular spring chamber, 1-1 is a first central through hole, 1-2 is a threaded hole, 1-3 is a third sealing groove, 1-4 is a water inlet and outlet, 2 is a molecular spring, 3 is a molecular spring piston rod, 4 is a molecular spring hydraulic oil chamber, 4-1 is a second sealing groove, 5 is an oil delivery pipe, 6 is a damping chamber, 6-1 is a second central through hole, 6-2 is a first sealing groove, 6-3 is an external threaded joint structure, 6-4 is an external connecting hole, 7 is a damping chamber piston rod, 8 is a piston, 8-1 is a damping chamber piston normally through hole, 8-2 is a damping chamber piston normally closed hole, 9 is a buffer water collecting chamber, 9-1 is a buffer liquid inlet and outlet, 10-1 is a filter cartridge section, 10-2 is a guide cartridge section, 11 is a valve core, 12 is a spring, 13 is an annular piston plate, 14 is a first push-pull rod, and 15 is a pull rod. DETAILED DESCRIPTION

[0024] like Figure 1 The illustrated embodiment shows a left-right interconnected suspension of a driving axle, comprising a damping vibration reduction component and an energy storage structure, wherein the energy storage structure is composed of a molecular spring chamber 1, a molecular spring 2 filled in the molecular spring chamber 1, a molecular spring piston rod 3 and a molecular spring hydraulic oil chamber 4, wherein a molecular spring hydraulic oil chamber 4 is symmetrically arranged at the left and right ends of the molecular spring chamber 1, wherein the molecular spring hydraulic oil chamber 3 is connected to the molecular spring chamber 1 and is detachably connected to its side wall by bolts, wherein the molecular spring piston rod 3 is piston-connected in the molecular spring hydraulic oil chamber 4, wherein the molecular spring hydraulic oil chambers 4 on the left and right sides are each connected to a damping vibration reduction component through an oil delivery pipe 5, wherein the damping vibration reduction component is filled with hydraulic oil and its upper end is connected to the vehicle frame. Under the action of road excitation, as the piston of the damping chamber moves downward, the hydraulic oil enters the molecular spring hydraulic oil chamber through the oil delivery pipe, and pushes the molecular spring piston rod to move into the molecular spring chamber, thereby storing mechanical energy; when the external excitation is withdrawn, the mechanical energy stored in the molecular spring is released, and pushes the molecular spring piston rod to move into the molecular spring hydraulic oil chamber. The present invention is used for automobile suspension. The molecular spring is a liquid-solid mixed medium composed of water and hydrophobic microporous material. When the suspension is compressed, part of the water is pressed into the hydrophobic microporous material; when the suspension is stretched, the water pressed into the hydrophobic microporous material will escape spontaneously; when the road conditions of the left and right wheels are different, for example, one wheel enters a deep pit, while the other side is still on a flat road; at this time, the suspension on the wheel on the side trapped in the deep pit is stretched, and the damping chamber piston rod moves outward, and the volume in the corresponding chamber will be filled by the molecular spring piston rod, that is, the molecular spring piston rod will move to the side where the damping chamber piston rod is stretched, thereby increasing the suspension height on this side and reducing the suspension height on the other side, thereby ensuring that the driving force of the driving wheel does not drop significantly, thereby improving the vehicle running quality.

[0025] like Figure 1The damping vibration reduction assembly shown is composed of a damping chamber 6, a damping chamber piston rod 7 and a piston 8. The lower end of the damping chamber 6 is connected to the oil delivery pipe 5, the hydraulic oil is filled in the damping chamber 6, the upper end of the damping chamber piston rod 7 is connected to the frame, the lower end of the damping chamber piston rod 7 extends into the damping chamber 6 and is connected to the piston 8. The damping chamber piston rod 7 drives the piston 8 to reciprocate in the damping chamber 6 to generate the damping force required by the suspension.

[0026] like Figure 2 An external connecting hole 6-4 is provided at the bottom of the damping chamber 6, a second central through hole 6-1 for the damping chamber piston rod 7 to extend into is provided at the top of the damping chamber 6, a first sealing groove 6-2 is provided on the inner wall of the second central through hole 6-1, an external threaded joint structure 6-3 connected to the oil pipeline 5 is provided on the side wall at the lower end of the damping chamber 6, and the damping chamber piston rod 7 and the second central through hole 6-1 are sealed by a first sealing ring provided in the first sealing groove.

[0027] like Figure 3 The piston 8 shown is provided with a damping chamber piston normally open hole 8-1 and a damping chamber piston normally closed hole 8-2. The piston 8 reciprocates in the damping chamber 6 along with the damping chamber piston rod 7. During the reciprocating motion, the hydraulic oil flows through the piston normally open hole 8-1 and the damping chamber piston normally closed hole 8-2 whose opening angle is controlled by the speed of the spring-loaded mass, which will generate the damping force required by the suspension. The upper and lower outlets of the damping chamber piston normally closed hole 8-2 are respectively covered by upper and lower damping adjustment plates. The upper damping adjustment plate is used to adjust the flow of hydraulic oil flowing through the piston normally closed hole 8-2 from above, thereby generating a damping force adapted to the vibration of the suspension. The lower damping adjustment plate is used to adjust the flow of hydraulic oil flowing through the piston normally closed hole 8-2 from below, thereby generating a damping force adapted to the vibration of the suspension.

[0028] The damping chamber piston rod 7 is provided with a thread on the top for connecting to the vehicle frame, and a journal and a thread on the bottom for fixing the piston 8 and the upper and lower damping adjustment plates.

[0029] like Figure 4 The molecular spring hydraulic chamber 4 shown is a stepped cylindrical shell with an external thread on the top. The external thread on the top of the molecular spring hydraulic chamber 4 is used to connect the oil pipeline 5. A second sealing groove 4-1 is provided on the inner wall of the central through hole at the bottom of the molecular spring hydraulic chamber 4. The molecular spring piston rod 3 and the central through hole at the bottom of the molecular spring hydraulic chamber are sealed by a second sealing ring arranged in the second sealing groove 4-1.

[0030] like Figure 5The molecular spring chamber 1 shown is a cylindrical cavity with first central through holes 1-1 at both ends and threaded holes 1-2 evenly distributed on the edge. The cavity of the molecular spring chamber 1 is filled with molecular springs 2 and water. Third sealing grooves 1-3 are provided on the inner walls of the first central through holes at both ends. The molecular spring piston rod 3 and the first central through hole at the end of the molecular spring chamber are sealed by a third sealing ring arranged in the third sealing groove.

[0031] like Figure 6 A cylindrical buffer water collecting chamber 9 is also fixed at the bottom of the molecular spring chamber 1 shown, and a buffer liquid inlet and outlet port 9-1 is opened at the top of the buffer water collecting chamber 9. A water inlet and outlet port 1-4 is opened at the bottom of the molecular spring chamber 1 relative to the position of the buffer liquid inlet and outlet port 9-1. A pressure protection valve body is vertically fixed between the upper and lower walls of the buffer water collecting chamber, and the upper end of the pressure protection valve body is facing the buffer liquid inlet and outlet port 9-1. The pressure protection valve body is connected with the water inlet and outlet port 1-4 at the bottom of the molecular spring chamber 1 through the buffer liquid inlet and outlet port 9-1. The pressure protection valve body is composed of a filter cartridge section 10-1 and a guide cylinder section 10-2 connected together from top to bottom. The filter cartridge section 10-1 and the guide cylinder section 10-2 are piston-type connected with a valve core 11 in the upper and lower parts. The valve core 11 is connected to the bottom of the buffer water collecting chamber through a spring 12. There is a gap between the outer wall of the pressure protection valve body and the inner wall of the buffer water collecting chamber. When the energy storage structure is overcharged, the pressure protection valve will automatically open to release the pressure and discharge part of the water into the buffer water collection chamber. This structure achieves a self-protection function.

[0032] like Figure 6 An annular piston plate 13 is also slidably connected between the outer wall of the pressure protection valve body and the inner wall of the buffer water collection chamber. The annular piston plate 13 is connected to the first push-pull rod 14, and the valve core is also connected to the pull rod 15. The bottom of the buffer water collection chamber is respectively provided with a first guide hole and a second guide hole relative to the first push-pull rod 14 and the pull rod 15. One end of the first push-pull rod 14 extends into the buffer water collection chamber along the first guide hole and is connected to the annular piston plate 13. One end of the pull rod 15 enters the pressure protection valve body along the second guide hole and is connected to the valve core 11. After the pressure relief is completed, the pull rod can be pulled first, and then the push-pull rod can be pushed to squeeze the water collected in the buffer water collection chamber back into the molecular spring chamber. The above structure saves resources and increases practical performance.

[0033] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A left-right interconnected suspension of a driving axle, comprising a damping vibration reduction component and an energy storage structure, characterized in that: The energy storage structure is composed of a molecular spring chamber (1), a molecular spring (2) filled in the molecular spring chamber (1), a molecular spring piston rod (3) and a molecular spring hydraulic oil chamber (4). A molecular spring hydraulic oil chamber (4) is symmetrically arranged at the left and right ends of the molecular spring chamber (1). The molecular spring hydraulic oil chamber (3) is connected to the molecular spring chamber (1) and is detachably connected to its side wall by bolts. The molecular spring piston rod (3) is piston-connected in the molecular spring hydraulic oil chamber (4). The molecular spring hydraulic oil chambers (4) on the left and right sides are each connected to a damping vibration reduction component through an oil delivery pipe (5). The damping vibration reduction component is filled with hydraulic oil and its upper end is connected to the vehicle frame.

2. The left and right interconnected suspension of a driving axle according to claim 1, characterized in that: The damping vibration reduction assembly is composed of a damping chamber (6), a damping chamber piston rod (7) and a piston (8); the lower end of the damping chamber (6) is connected to the oil delivery pipe (5); hydraulic oil is filled in the damping chamber (6); the upper end of the damping chamber piston rod (7) is connected to the vehicle frame; the lower end of the damping chamber piston rod (7) extends into the damping chamber (6) and is connected to the piston (8); the damping chamber piston rod (7) drives the piston (8) to reciprocate in the damping chamber (6) to generate the damping force required by the suspension.

3. The left and right interconnected suspension of a driving axle according to claim 2, characterized in that: An external connection hole (6-4) is provided at the bottom of the damping chamber (6); a central through hole (6-1) for the damping chamber piston rod (7) to extend into is provided at the top of the damping chamber (6); a first sealing groove (6-2) is provided on the inner wall of the central through hole (6-1); an external threaded joint structure (6-3) connected to the oil delivery pipe (5) is provided on the side wall at the lower end of the damping chamber (6); and a first sealing ring provided in the first sealing groove is used to seal between the damping chamber piston rod (7) and the central through hole (6-1).

4. The left and right interconnected suspension of a driving axle according to claim 2, characterized in that: The piston (8) is provided with a damping chamber piston normally open hole (8-1) and a damping chamber piston normally closed hole (8-2). The piston (8) reciprocates in the damping chamber (6) along with the damping chamber piston rod (7). During the reciprocating motion, hydraulic oil flows through the piston normally open hole (8-1) and the damping chamber piston normally closed hole (8-2) whose opening angle is controlled by the speed of the sprung mass, thereby generating the damping force required by the suspension. The upper and lower outlets of the damping chamber piston normally closed hole (8-2) are respectively covered by upper and lower damping adjustment plates.

5. The left and right interconnected suspension of a driving axle according to claim 2, characterized in that: The damping chamber piston rod (7) is provided with a thread at the top for connecting to the vehicle frame, and a journal and a thread at the bottom for fixing the piston (8) and the upper and lower damping adjustment plates.

6. The left and right interconnected suspension of a driving axle according to claim 1, characterized in that: The molecular spring hydraulic chamber (4) is a stepped cylindrical shell with an external thread on the top. The external thread on the top of the molecular spring hydraulic chamber (4) is used to connect the oil pipeline (5). A second sealing groove (4-1) is provided on the inner wall of the central through hole at the bottom of the molecular spring hydraulic chamber (4). The molecular spring piston rod (3) and the central through hole at the bottom of the molecular spring hydraulic chamber are sealed by a second sealing ring provided in the second sealing groove (4-1).

7. The left and right interconnected suspension of a driving axle according to claim 1, characterized in that: The molecular spring chamber (1) is a cylindrical chamber with central through holes (1-1) at both ends and threaded holes (1-2) evenly distributed on the edge. The molecular spring chamber (1) is filled with molecular springs (2) and water. The inner walls of the central through holes at both ends are provided with third sealing grooves (1-3). The molecular spring piston rod (3) and the central through hole at the end of the molecular spring chamber are sealed by a third sealing ring provided in the third sealing groove.

8. The left and right interconnected suspension of a driving axle according to claim 1, characterized in that: A cylindrical buffer water collection chamber (9) is also fixed at the bottom of the molecular spring chamber (1), a buffer liquid inlet and outlet (9-1) is provided at the top of the buffer water collection chamber (9), a water inlet and outlet (1-4) is provided at the bottom of the molecular spring chamber 1 at a position relative to the buffer liquid inlet and outlet (9-1), a pressure protection valve body is vertically fixed between the upper and lower walls of the buffer water collection chamber, the upper end of the pressure protection valve body is directly opposite to the buffer liquid inlet and outlet (9-1), and the pressure protection valve body is connected to the buffer liquid inlet and outlet (9-1) ) is connected to the water inlet and outlet (1-4) at the bottom of the molecular spring chamber (1), the pressure protection valve body is composed of a filter cartridge section (10-1) and a guide cylinder section (10-2) connected together in an upper and lower manner, and a valve core (11) is piston-connected in the upper and lower parts of the filter cartridge section (10-1) and the guide cylinder section (10-2), and the valve core (11) is connected to the bottom of the buffer water collection chamber through a spring (12), and there is a gap between the outer wall of the pressure protection valve body and the inner wall of the buffer water collection chamber.

9. The left and right interconnected suspension of a driving axle according to claim 8, characterized in that: An annular piston plate (13) is slidably connected up and down between the outer wall of the pressure protection valve body and the inner wall of the buffer water collecting chamber. The annular piston plate (13) is connected to the first push-pull rod (14). The valve core is also connected to the pull rod (15). The bottom of the buffer water collecting chamber is provided with a first guide hole and a second guide hole at positions relative to the first push-pull rod (14) and the pull rod (15). One end of the first push-pull rod (14) extends into the buffer water collecting chamber along the first guide hole and is connected to the annular piston plate (13). One end of the pull rod (15) enters the pressure protection valve body along the second guide hole and is connected to the valve core (11).

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