High-stress spring suspension for new energy heavy truck

Abstract

The invention discloses a high-stress spring suspension for a new energy heavy truck, and belongs to the field of elastic suspensions characterized by arrangement, positioning or category of combination of springs and shock absorbers, and the top ends of the shock absorbers of the suspension are rotatably mounted on a frame through hinge seats. The bottom end of the suspension shock absorber is rotationally installed on the lower swing arm pin shaft through a support, the suspension shock absorber further comprises a sealing protection rubber sleeve arranged on the outer side of the guide shaft, and the cooling mechanism cools the suspension shock absorber through air flow generated by compression rebound of the suspension shock absorber. According to the high-stress spring suspension for the new energy heavy truck, on the basis that the related structure of the spring suspension is improved and the damping and springback damping effects of the spring suspension are not affected, the acting force generated within the reasonable displacement range of the suspension shock absorber is reasonably utilized, effective heat conduction and cooling in the suspension shock absorber are achieved, and the service life of the suspension shock absorber is prolonged. And meanwhile, a plurality of other auxiliary functions are achieved, and the durability of the spring suspension in a high-strength use environment of a special scene is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle suspension, in particular to an elastic suspension characterized by the arrangement, positioning or type of a spring and shock absorber combination, and specifically to a high-stress spring suspension for a new energy heavy truck. Background Art

[0002] Spring suspension generally refers to a combination of springs and suspension shock absorbers and is used in vehicle suspension systems. By connecting the frame and the swing arm respectively, the bounce of the wheels and the body of the vehicle during driving is suppressed. For heavy trucks of new energy types, the working strength of the spring suspension is correspondingly higher. For example, the prior art discloses a type A air spring rear suspension for large buses with the publication number CN101503051A, which includes an A-frame, a connection assembly is connected to the front end of the A-frame, and air spring airbag assemblies and suspension shock absorbers are arranged on both sides of the rear end of the A-frame in sequence. A flexible connection end support of a height control valve is arranged on the A-frame, and a lateral stabilizer bar is connected to the rear end of the A-frame. The invention has the advantages of simple structure, light weight, few special parts, many general parts, easy production, low cost, accurate and reliable axle positioning, and no need for adjustment.

[0003] Or an active coil spring suspension with publication number CN101830156A in the prior art, including a spring preload adjustment device, a suspension height adjustment device and a suspension shock absorber, wherein the spring preload adjustment device includes an upper spring seat, a coil spring, a lower spring seat, a pull rod, a preload driven gear and a preload power device, wherein the preload driven gear is rotatably arranged on the upper spring seat through upper and lower bearings, the pull rod is connected to the preload driven gear through threaded cooperation and passes through the upper spring seat, the coil spring and the lower spring seat, a limit clamp is provided at the lower end of the pull rod, and the preload power device cooperates with the preload driven gear. After adopting this structure, it has the advantages of simple structure, light weight, small size, low failure rate, low production cost, convenient maintenance, good stability, and the ability to actively adjust the spring preload and suspension height.

[0004] The above-mentioned prior art has made relatively excellent improvements in improving the shock absorption and damping performance of the spring suspension. However, due to the heavy weight of the heavy truck itself and the relatively more complex and harsh working environment, the repeated compression of the spring and the repeated expansion and contraction of the suspension shock absorber, and the repeated compression of the internal oil, will cause the overall temperature of the suspension to be too high. Long-term use under high external temperature will cause the spring suspension part of the suspension that is commonly found in the prior art to be more easily aged and replaced. Summary of the invention

[0005] The purpose of the present invention is to provide a high-stress spring suspension for new energy heavy-duty trucks, so as to solve the problem raised in the above background technology that due to the heavy weight of heavy-duty trucks themselves and the relatively more complex and harsh working environment, the repeated compression of the springs and the repeated expansion and contraction of the suspension shock absorbers, and the repeated compression of the internal oil, the overall temperature of the suspension is too high. Long-term use under high external temperature will cause the spring suspension part of the suspension to age and be more easily replaced, which is a common problem in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-stress spring suspension for a new energy heavy-duty truck, comprising a suspension shock absorber and an elastic member surrounding the suspension shock absorber, wherein the top end of the suspension shock absorber is rotatably mounted on the vehicle frame through a hinge seat, and the bottom end of the suspension shock absorber is rotatably mounted on the lower arm pin shaft through a support, wherein the suspension shock absorber also includes a sealing protective rubber sleeve arranged on the outside of the guide shaft, and a cooling mechanism is also arranged on the periphery of the suspension shock absorber, wherein the cooling mechanism generates airflow to cool the suspension shock absorber through compression and rebound of the suspension shock absorber.

[0007] As a further solution, the cooling mechanism includes a guiding slide rod slidably mounted on a support.

[0008] As a further solution, the bottom end of the guiding slide bar is fixed to the upper end surface of the slide plate, wherein the slide plate is vertically slidably mounted in the annular box.

[0009] As a further solution, the annular box is fixed to the lower end surface of the support.

[0010] As a further solution, the compression and rebound of the suspension shock absorber is guided by a slide bar to drive the slide plate to move vertically in the annular box, so as to generate airflow and act on the suspension shock absorber.

[0011] As a further solution, the space below the slide plate is a non-sealed space, and the space above the slide plate is connected to the first cooling air hole provided on the guiding slide rod.

[0012] As a further solution, the first cooling air hole is connected to the second cooling air hole provided in the upper half of the guiding slide rod through a cavity provided in the interior of the guiding slide rod.

[0013] As a further solution, the second cooling air holes are vertically distributed in the upper half of the guiding slide rod, and a plurality of the cooling air holes are respectively oriented toward the cylinder of the suspension shock absorber and the surface of the sealing protective rubber sleeve.

[0014] As a further solution, the cooling mechanism further includes a metal sheet arranged between the suspension shock absorber and the elastic member.

[0015] As a further solution, the metal sheets are distributed at equal angles about the axis of the suspension shock absorber, and the lower half of the metal sheet is attached to the outer wall of the metal cylinder of the suspension shock absorber to form a heat dissipation fin structure.

[0016] As a further solution, the upper flexible section of the metal sheet is attached to the outside of the sealing protective rubber sleeve, and the attached edge between the metal sheet and the sealing protective rubber sleeve is a multi-section bending structure.

[0017] As a further solution, the cooling mechanism includes at least two connecting pipes, wherein a plurality of the connecting pipes are connected to the cooling space opened inside the suspension shock absorber.

[0018] As a further solution, the cooling space is an air cavity opened inside the guide rod of the suspension shock absorber.

[0019] As a further solution, the bottom ends of the plurality of connecting pipes are respectively connected to the inner spaces of the annular boxes above and below the slide plate.

[0020] As a further solution, the upward and downward movement of the slide plate causes the air cavity and the air flow inside the annular box to be transferred back and forth via the connecting pipes, and to exchange heat with the outside through the multiple connecting pipes.

[0021] As a further solution, the bottom ends of the plurality of connecting pipes are connected to the inner space of the annular box above or below the slide plate, wherein the air cavity is connected to the outside through a sealed pipeline penetrating the sealing protective rubber sleeve.

[0022] The technical effect produced by the present invention is: improving the relevant structure of the spring suspension, ensuring that its shock absorption and rebound damping effects are not affected, making reasonable use of the force generated within the reasonable displacement range of the suspension shock absorber, realizing effective heat conduction and cooling inside the suspension shock absorber, and realizing several other auxiliary functions at the same time, effectively improving the durability of the spring suspension in high-intensity use environments in special scenarios, as shown in the following content.

[0023] 1. The structural design of the guide slide bar and the slide plate enables the suspension shock absorber to drive the guide slide bar and the slide plate to move synchronously in the annular box during the elastic expansion and contraction process, thereby producing an air pressure regulation effect and generating a flowing airflow, thereby guiding the airflow to flow toward the suspension shock absorber to achieve a cooling effect; Furthermore, the hollow structure of the guide slide bar and the structural design of multiple groups of cooling air holes can, while producing an air pressure regulating effect when the skateboard moves, enable the generated airflow to be blown out from the cooling air holes in the upper half of the guide slide bar under the guidance of the hollow structure. The airflow blowing on the suspension shock absorber can not only achieve the auxiliary cooling effect, but also can assist in high-pressure pulse airflow cleaning of the folds of the sealing protective rubber sleeve by blowing on the sealing protective rubber sleeve, thereby achieving better use effect.

[0024] 2. The use of a metal sheet type cooling mechanism can, on the one hand, utilize the heat dissipation fin structure formed by multiple metal sheets to effectively cool the metal cylinder structure of the suspension shock absorber, and can also utilize the deformable top portion thereof to brush over the wrinkled and deformed part when the sealing protective rubber sleeve is deformed, thereby preventing objects such as stones from remaining in the sealing protective rubber sleeve; 3. The structural design of multiple connecting pipes and air cavities enables the suspension shock absorber to drive the skateboard to move synchronously and at high frequency while undergoing high-intensity expansion and contraction changes, thereby generating an airflow conveying effect and effectively exchanging heat and cooling the oil inside the guide rod of the suspension shock absorber, thereby effectively increasing the service life of the spring suspension. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the distribution structure of the guiding slide bars of the present invention; Figure 3 This is a schematic diagram of the internal structure of the ring box of the present invention; Figure 4 This is a schematic diagram of the cooling pore distribution structure of the present invention; Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the metal sheet distribution structure of the present invention; Figure 7 It is a schematic diagram of the structure of the metal sheet and the sealing protective rubber sleeve of the present invention being bonded together; Figure 8 This is a schematic diagram of the structure of the upper metal sheet after deformation of the present invention; Fig. 9 This is a schematic diagram of the internal structure of the ring box according to the second embodiment of the present invention; Fig.10 It is a schematic diagram of the air cavity distribution structure of the present invention.

[0026] In the figure: 1. suspension shock absorber; 2. elastic member; 3. vehicle frame; 4. support; 5. lower arm pin; 6. sealing protective rubber sleeve; 7. guide slide rod; 8. annular box; 9. slide plate; 10. first cooling air hole; 11. second cooling air hole; 12. connecting pipe; 13. metal sheet; 14. air cavity. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 10 , the present invention provides the following technical solutions: Embodiment 1: In this embodiment, the problem to be solved is that there is no effective means for cooling the spring suspension part in the prior art, and the solution is as follows Figure 1-4As shown, the spring suspension includes a suspension shock absorber 1 and an elastic member 2 surrounding the suspension shock absorber, wherein the top end of the suspension shock absorber 1 is rotatably mounted on the vehicle frame 3 through a hinge seat, and the bottom end of the suspension shock absorber 1 is rotatably mounted on the lower swing arm pin 5 through a support 4, wherein the suspension shock absorber 1 also includes a sealing protective rubber sleeve 6 arranged on the outside of the guide shaft, and a cooling mechanism is also arranged on the periphery of the suspension shock absorber 1, wherein the cooling mechanism generates airflow to cool the suspension shock absorber 1 through the compression and rebound of the suspension shock absorber 1, and the cooling mechanism includes a guide slide rod 7 slidably mounted on the support 4, and the bottom end of the guide slide rod 7 is fixed On the upper end surface of the slide plate 9, the slide plate 9 is vertically slidably installed in the annular box 8, and the annular box 8 is fixed to the lower end surface of the support 4. The compression and rebound of the suspension shock absorber 1 drives the slide plate 9 to move vertically in the annular box 8 through the guide slide bar 7, which is used to generate airflow and act on the suspension shock absorber 1. The space below the slide plate 9 is a non-sealed space, and the space above the slide plate 9 is connected to the first cooling air hole 10 opened on the guide slide bar 7, wherein the first cooling air hole 10 is connected to the second cooling air hole 11 opened in the upper half of the guide slide bar 7 through the cavity opened in the guide slide bar 7. The shock absorber 1 includes a metal cylinder, oil distributed in the metal cylinder, a guide slide rod and a valve plate for guiding the flow of oil, and a sealing protective rubber sleeve 6 for sealing the connection between the guide rod and the cylinder. During the driving of the heavy truck, the tire passes through an undulating road surface, causing the spring to be compressed and rebound. The kinetic energy is stored during the compression process and released during the rebound. At this time, the lower arm synchronously compresses the suspension shock absorber 1 and subsequently releases the kinetic energy, causing the guide rod to move at a high frequency in the cylinder. Therefore, the overall length of the suspension shock absorber 1 will be repeatedly compressed and stretched. During this process, the guide slide rod 7 synchronously slides on the support 4 and drives its bottom end to be fixed. The installed skateboard 9 moves up and down synchronously in the annular box 8. In the present embodiment, the space below the skateboard 9 is a non-enclosed space, and the internal air pressure of the space above the skateboard will change due to the movement of the skateboard 9. Since the first cooling air hole 10 is always located in the annular box 8, the high-frequency change of the air pressure in the space will directly act on the second cooling air hole 11 under the conduction effect of the internal cavity of the guiding slide rod 7. The airflow blown out by the second cooling air hole 11 at a slightly lower position will directly act on the cylinder and realize airflow cooling. It is suitable for the situation where the car is driving at a low speed and the strength of the collision airflow is not enough to cool the suspension shock absorber 1.

[0029] This embodiment further discloses the following contents, which are still as follows: Figure 4As shown, when a heavy truck is driving on a complex road, it is very easy for small stones and other particles on the road to splash and get stuck in the sealing protective rubber sleeve 6. The sealing protective rubber sleeve 6 then repeatedly compresses and deforms, which is another major reason why the sealing protective rubber sleeve 6 is easily damaged in the prior art. Therefore, the following content is disclosed in this scheme: the second cooling air holes 11 are vertically distributed in the upper half of the guiding slide bar 7, and multiple cooling air holes are respectively facing the cylinder of the suspension shock absorber 1 and the surface of the sealing protective rubber sleeve 6. The second cooling air holes 11 are also distributed near the sealing protective rubber sleeve 6. Therefore, when a high-pressure pulse airflow is generated, it will act on the sealing protective rubber sleeve 6 accordingly. Therefore, stones that may remain on the sealing protective rubber sleeve 6 will also be loosened under the influence of the airflow and more easily fall off due to the driving of the car, thereby improving the overall protection effect of the sealing protective rubber sleeve 6 and the suspension shock absorber 1.

[0030] Embodiment 2: In this embodiment, another cooling mechanism is disclosed, and the cooling mechanism can actually exist at the same time as the above solution and play a better heat conduction effect. However, due to cost constraints, a better effect can be achieved by adopting one of the solutions, such as Figure 5-Figure 8 As shown, the cooling mechanism further includes a metal sheet 13 arranged between the suspension shock absorber 1 and the elastic member 2, wherein the metal sheet 13 is distributed at equal angles with respect to the axis of the suspension shock absorber 1, and the lower half of the metal sheet 13 is attached to the outer wall of the metal cylinder of the suspension shock absorber 1 to form a heat dissipation fin structure, and the upper flexible section of the metal sheet 13 is attached to the outer side of the sealing protective rubber sleeve 6, and at the same time, the attached edge of the metal sheet 13 and the sealing protective rubber sleeve 6 is a multi-section bending structure, and when the lower half of the metal sheet 13 is tightly attached to the cylinder of the suspension shock absorber 1, the high thermal conductivity of the metal itself can be used to improve the heat dissipation. Thermal cooling performance, on the other hand, the flexible structure involved in its top end can bend and deform synchronously when the suspension shock absorber 1 as a whole undergoes compression deformation, and utilizing this deformation process and the design of the relatively nonlinear structure of the inner surface of the metal sheet 13 can assist in cleaning the sealing protective rubber sleeve 6. At the same time, there is another technical effect, that is, when the sealing protective rubber sleeve 6 is broken, the airflow blown out of the space formed by the sealing protective rubber sleeve 6 during the overall compression of the suspension will act on the metal sheet 13, thereby generating sound of a specific frequency to facilitate the daily maintenance work of the staff.

[0031] As a further solution disclosed in the above embodiment, Figure 9-10The cooling mechanism shown includes at least two connecting pipes 12, wherein the multiple connecting pipes 12 are all connected to the cooling space opened inside the suspension shock absorber 1, and the cooling space is an air cavity 14 opened inside the guide rod in the suspension shock absorber 1, and the bottom ends of the multiple connecting pipes 12 are respectively connected to the internal space of the annular box 8 above and below the slide plate 9, wherein the up and down movement of the slide plate 9 causes the air cavity 14 and the air flow inside the annular box 8 to reciprocate through the connecting pipe 12, and heat is exchanged with the outside through the multiple connecting pipes 12, and the bottom ends of the multiple connecting pipes 12 are all connected to the internal space of the annular box 8 above or below the slide plate 9, wherein the air cavity 14 is penetrated by a sealing protective rubber sleeve 6 is connected to the outside. The above scheme includes two situations, but both situations utilize the movement of the guiding slide bar 7 and the slide plate 9 to produce the airflow conveying effect. The same as the above embodiment is that the airflow still acts on the suspension shock absorber 1, and the difference is that the oil is cooled by heat conduction more directly and comprehensively from the inside of the suspension shock absorber 1. The movement of the slide plate 9 causes the airflow in the space above or below it to enter the air cavity 14 through the connecting pipe 12. One of the schemes is to discharge the airflow squeezed out of the air cavity 14 to the space on the other side of the annular box 8, and the second scheme is to discharge the airflow directly from the outside of the sealing protective rubber sleeve 6. Either way, a better heat conduction and cooling effect can be achieved.

[0032] It should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or components referred to must have specific directions, be constructed and operated in specific directions, and therefore cannot be understood as limitations on the protection content of the present invention. The standard parts used in the present invention can all be purchased on the market, and special-shaped parts can all be customized according to the instructions and the drawings. The specific connection methods of each part all adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high stress spring suspension for a new energy heavy truck, comprising a suspension shock absorber (1) and an elastic member (2) surrounding the suspension shock absorber, wherein the top end of the suspension shock absorber (1) is rotatably mounted on a vehicle frame (3) via a hinge seat, and the bottom end of the suspension shock absorber (1) is rotatably mounted on a lower arm pin (5) via a support seat (4), wherein the suspension shock absorber (1) further comprises a sealing protective rubber sleeve (6) arranged on the outer side of a guide shaft, characterized in that: A cooling mechanism is also provided on the periphery of the suspension shock absorber (1), wherein the cooling mechanism generates airflow through compression and rebound of the suspension shock absorber (1) to cool the suspension shock absorber (1).

2. The high stress spring suspension for new energy heavy truck according to claim 1 is characterized in that: The cooling mechanism comprises a guide slide bar (7) slidably mounted on a support (4), and the bottom end of the guide slide bar (7) is fixed to the upper end surface of a slide plate (9), wherein the slide plate (9) is vertically slidably mounted in an annular box (8), and the annular box (8) is fixed to the lower end surface of the support (4).

3. The high stress spring suspension for new energy heavy truck according to claim 2 is characterized in that: The compression and rebound of the suspension shock absorber (1) drives the slide plate (9) to move vertically in the annular box (8) via a guiding slide rod (7), so as to generate airflow and act on the suspension shock absorber (1).

4. The high stress spring suspension for new energy heavy truck according to claim 3 is characterized in that: The space below the slide plate (9) is a non-sealed space, while the space above the slide plate (9) is connected to a first cooling air hole (10) provided on the guide slide bar (7), wherein the first cooling air hole (10) is connected to a second cooling air hole (11) provided on the upper half of the guide slide bar (7) via a cavity provided inside the guide slide bar (7).

5. The high stress spring suspension for new energy heavy truck according to claim 4 is characterized in that: The second cooling air holes (11) are vertically distributed on the upper half of the guide slide rod (7), and a plurality of the cooling air holes are respectively oriented toward the cylinder of the suspension shock absorber (1) and the surface of the sealing protective rubber sleeve (6).

6. The high stress spring suspension for new energy heavy truck according to claim 2 is characterized in that: The cooling mechanism further comprises a metal sheet (13) arranged between the suspension shock absorber (1) and the elastic member (2), wherein the metal sheet (13) is distributed at equal angles with respect to the axis of the suspension shock absorber (1), and the lower half of the metal sheet (13) is attached to the outer wall of the metal cylinder of the suspension shock absorber (1) to form a heat dissipation fin structure.

7. The high stress spring suspension for new energy heavy truck according to claim 6 is characterized in that: The upper flexible section of the metal sheet (13) is attached to the outside of the sealing protective rubber sleeve (6), and the attached edge between the metal sheet (13) and the sealing protective rubber sleeve (6) is a multi-section bent structure.

8. A high stress spring suspension for a new energy heavy truck according to claim 2 or 7, characterized in that: The cooling mechanism comprises at least two connecting pipes (12), wherein a plurality of the connecting pipes (12) are connected to a cooling space provided inside the suspension shock absorber (1), and the cooling space is an air cavity (14) provided inside a guide rod in the suspension shock absorber (1).

9. The high stress spring suspension for new energy heavy truck according to claim 8 is characterized in that: The bottom ends of the plurality of connecting tubes (12) are respectively connected to the internal spaces of the annular box (8) above and below the slide plate (9), wherein the upward and downward movement of the slide plate (9) causes the airflow in the air cavity (14) and the annular box (8) to reciprocate through the connecting tubes (12) and to exchange heat with the outside through the plurality of connecting tubes (12).

10. The high stress spring suspension for new energy heavy truck according to claim 8 is characterized in that: The bottom ends of the plurality of connecting pipes (12) are connected to the inner space of the annular box (8) above or below the slide plate (9), wherein the air cavity (14) is connected to the outside through a pipeline that seals and penetrates the sealing protective rubber sleeve (6).

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