A high-stress spring suspension for a new energy heavy truck

Abstract

The application discloses a high-stress spring suspension for new energy heavy truck, and belongs to the field of elastic suspension characterized by the arrangement, positioning or category of spring and shock absorber combination, wherein the top end of the suspension shock absorber is rotatably installed on the frame through a hinge seat, and the bottom end of the suspension shock absorber is rotatably installed on the lower swing arm pin shaft through a support, and the suspension shock absorber further comprises a sealing protective rubber sleeve arranged outside a guide shaft, and a cooling mechanism cools the suspension shock absorber through airflow generated by compression and rebound of the suspension shock absorber. The high-stress spring suspension for new energy heavy truck improves the related structure of the spring suspension, ensures that the damping and rebound damping effects of the suspension shock absorber are not affected, reasonably utilizes the force generated within the reasonable displacement range of the suspension shock absorber, realizes effective heat conduction and cooling inside the suspension shock absorber, simultaneously realizes other several auxiliary functions, and effectively improves the durability of the spring suspension in a high-strength use environment in a special scene.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicle suspension, in particular to a high-stress spring suspension for new energy heavy-duty trucks. BACKGROUND

[0002] Spring suspension generally refers to the combination of spring and suspension shock absorber and its application in vehicle suspension system, which can suppress the bounce of wheels and vehicle body during vehicle driving by connecting the frame and swing arm respectively, and the working strength of spring suspension for new energy heavy-duty trucks is higher, for example, a rear suspension special for large passenger cars in the prior art with publication number CN101503051A, which comprises an A-shaped frame, a connecting assembly connected to the front end of the A-shaped frame, air spring air bag assemblies and suspension shock absorbers arranged in sequence on both sides of the rear end of the A-shaped frame, a flexible connection end head support provided with a height control valve on the A-shaped frame, and a transverse stabilizer connected to the rear end of the A-shaped frame. The invention has the advantages of simple structure, light weight, few special parts, many general parts, easy manufacturing, low cost, accurate and reliable axle positioning, and no need for adjustment.

[0003] Or the prior art with publication number CN101830156A, an active coil spring suspension, comprising a spring pre-tightening force adjusting device, a suspension height adjusting device and a suspension shock absorber, the spring pre-tightening force adjusting device comprises an upper spring seat, a coil spring, a lower spring seat, a pull rod, a pre-tightening driven gear and a pre-tightening power device, the pre-tightening driven gear is rotatably arranged on the upper spring seat through upper and lower bearings, the pull rod is connected with the pre-tightening driven gear through thread cooperation and passes through the upper spring seat, the coil spring and the lower spring seat, the lower end of the pull rod is provided with a limiting clamp, and the pre-tightening power device is matched with the pre-tightening driven gear. After adopting the structure, it has the advantages of simple structure, light weight, small size, low failure rate, low production cost, convenient maintenance, good stability, active adjustment of spring pre-tightening force and suspension height, etc.

[0004] The above-mentioned prior art has made excellent improvement in improving the damping performance of spring suspension, but due to the large weight of heavy-duty trucks and the relatively more complex and harsh working environment, the repeated compression of the spring and the repeated extension of the suspension shock absorber, and the repeated compression of the internal oil, result in the overall temperature of the suspension being too high, and long-term use in high-temperature environment will cause the spring suspension part of the suspension to be more prone to aging and replacement. SUMMARY

[0005] The present application aims to provide a new energy heavy truck high stress spring suspension, to solve the above problems in the background art due to the heavy weight of the heavy truck itself, the working environment is also relatively more complex and harsh, repeated compression of the spring and repeated extension of the suspension shock absorber, and the internal oil is also repeatedly in a compressed state, which causes the overall temperature of the suspension to be too high, and long-term use in high-temperature environments will cause the problem of more frequent replacement of the spring suspension part of the suspension in the prior art.

[0006] To achieve the above object, the present application provides the following technical scheme: a new energy heavy truck high stress spring suspension, 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 frame through a hinge seat, and the bottom end of the suspension shock absorber is rotatably mounted on the lower swing arm pin shaft through a support, wherein the suspension shock absorber further comprises a sealing protective rubber sleeve arranged outside the guide shaft, and the suspension shock absorber further comprises a cooling mechanism arranged outside the suspension shock absorber, wherein the cooling mechanism cools the suspension shock absorber by generating airflow through the compression and rebound of the suspension shock absorber.

[0007] As a further scheme, the cooling mechanism comprises a guide slide rod slidably mounted on the support.

[0008] As a further scheme, the bottom end of the guide slide rod is fixed to the upper end surface of the slide plate, and the slide plate is vertically slidably mounted in the annular box.

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

[0010] As a further scheme, the compression and rebound of the suspension shock absorber vertically moves the slide plate in the annular box through the guide slide rod, to generate airflow and act on the suspension shock absorber.

[0011] As a further scheme, the space below the slide plate is a non-sealed space, and the space above the slide plate is in communication with the first cooling air hole opened in the guide slide rod.

[0012] As a further scheme, the first cooling air hole is in communication with the second cooling air hole opened in the upper half of the guide slide rod through the cavity opened in the guide slide rod.

[0013] As a further scheme, the second cooling air hole is vertically distributed in the upper half of the guide slide rod, and the plurality of cooling air holes are respectively directed towards the surface of the cylinder of the suspension shock absorber and the sealing protective rubber sleeve.

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

[0015] As a further scheme, the metal sheets are equiangularly distributed about the axis of the suspension shock absorber, and the lower half of the metal sheets is attached to the outer wall of the metal cylinder of the suspension shock absorber and forms a heat dissipation fin structure.

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

[0017] As a further scheme, the cooling mechanism comprises at least two connecting pipes, wherein the connecting pipes are in communication with the cooling space inside the suspension shock absorber.

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

[0019] As a further scheme, the bottom ends of the connecting pipes are in communication with the internal space of the annular box above and below the sliding plate.

[0020] As a further scheme, the upward and downward movement of the sliding plate causes the air flow in the air cavity and the annular box to reciprocate through the connecting pipes and exchange heat with the outside through the connecting pipes.

[0021] As a further scheme, the bottom ends of the connecting pipes are in communication with the internal space of the annular box above and below the sliding plate, and the air cavity is in communication with the outside through a pipe that penetrates the sealing protective rubber sleeve.

[0022] The technical effects of the present application are: improving the related structure of the spring suspension, ensuring that the damping and rebound damping effect is not affected, reasonably utilizing 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 auxiliary functions, effectively improving the durability of the spring suspension in special scene high-strength use environment, as shown in the following content.

[0023] 1. The structure design of the guide slide rod and the sliding plate enables the suspension shock absorber to move in the annular box synchronously during elastic expansion and contraction, thereby generating air pressure adjustment effect and flowing air flow, and guiding the air flow to flow towards the suspension shock absorber to achieve cooling effect.

[0024] Further, the hollow structure of the guide slide rod and the structure design of the multiple sets of cooling air holes can make the air pressure adjustment effect generated by the slide plate movement, and make the generated air flow blow out from the cooling air holes of the upper half of the guide slide rod under the guidance of the hollow structure, so that the air flow blowing on the suspension shock absorber can not only achieve the effect of auxiliary cooling, but also can clean the wrinkle of the sealing protective rubber sleeve through the method of blowing on the sealing protective rubber sleeve, and the use effect is better.

[0025] 2. The use of the cooling mechanism of the metal sheet type can not only utilize the heat dissipation fin structure formed by multiple metal sheets to effectively cool the metal cylinder part structure of the suspension shock absorber, but also utilize the deformable part at the top to wipe the wrinkle deformation part when the sealing protective rubber sleeve is deformed, so as to avoid the residual of stones and other objects at the sealing protective rubber sleeve.

[0026] 3. The structure design of the multiple connecting pipes cooperating with the air cavity can make the suspension shock absorber move at high frequency and generate air flow conveying effect while stretching and contracting at high strength, so as to effectively heat and cool the oil in the guide rod of the suspension shock absorber, and effectively improve the service life of the spring suspension. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a whole structure schematic view of the embodiment one of the application;

[0028] Figure 2 It is a distribution structure schematic view of the guide slide rod of the application;

[0029] Figure 3 It is a schematic view of the internal structure of the annular box of the application;

[0030] Figure 4 It is a distribution structure schematic view of the cooling air hole of the application;

[0031] Figure 5 It is a whole structure schematic view of the embodiment two of the application;

[0032] Figure 6 It is a distribution structure schematic view of the metal sheet of the application;

[0033] Figure 7 It is a structure schematic view of the metal sheet and the sealing protective rubber sleeve of the application;

[0034] Figure 8 It is a structure schematic view of the metal sheet after deformation of the upper section;

[0035] Figure 9 It is a schematic view of the internal structure of the annular box of the embodiment two of the application;

[0036] Figure 10The figure is a schematic diagram of the air cavity distribution structure of the present application.

[0037] In the figure: 1, suspension shock absorber; 2, elastic member; 3, frame; 4, support; 5, lower swing arm pin; 6, sealing protection rubber sleeve; 7, guiding slide rod; 8, ring 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

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0039] Please refer to Figures 1-10 The present application provides the following technical solutions:

[0040] Embodiment one: In this embodiment, the problem to be solved is that there is no effective cooling means for the spring suspension part in the prior art, and the solution is as follows Figures 1-4As shown, the spring suspension includes a suspension shock absorber 1 and a resilient member 2 around the periphery thereof, wherein the top end of the suspension shock absorber 1 is rotatably installed on the frame 3 through the hinged seat, and the bottom end of the suspension shock absorber 1 is rotatably installed on the lower swing arm pin shaft 5 through the support 4, wherein the suspension shock absorber 1 further comprises a sealing protective rubber sleeve 6 arranged outside the guide shaft, and the periphery of the suspension shock absorber 1 is further provided with a cooling mechanism, wherein the cooling mechanism cools the suspension shock absorber 1 through the airflow generated by the compression and rebound of the suspension shock absorber 1, and the cooling mechanism comprises a guide slide rod 7 slidably installed on the support 4, and the bottom end of the guide slide rod 7 is fixed to the upper end face of a sliding plate 9, wherein the sliding plate 9 is vertically slidably installed in a ring-shaped box 8 fixed to the lower end face of the support 4, and the compression and rebound of the suspension shock absorber 1 drives the sliding plate 9 to vertically move in the ring-shaped box 8 through the guide slide rod 7, so as to generate airflow and act on the suspension shock absorber 1, the space below the sliding plate 9 is a non-sealed space, and the space above the sliding plate 9 is in communication with a first cooling air hole 10 opened on the guide slide rod 7, wherein the first cooling air hole 10 is in communication with a second cooling air hole 11 opened on the upper half of the guide slide rod 7 through a cavity opened in the inside of the guide slide rod 7, and the suspension shock absorber 1 comprises a metal cylinder, oil liquid distributed in the metal cylinder, a guide slide rod and a valve plate for guiding the flow of the oil liquid, and the sealing protective rubber sleeve 6 for sealing the connection between the guide rod and the cylinder, in the process of driving the heavy truck, the tire passes through the undulating road to compress and rebound the spring, and stores kinetic energy in the compression process and releases kinetic energy when rebounding, at this time, the lower swing arm synchronously compresses the suspension shock absorber 1 and subsequently releases the kinetic energy, so that the guide rod moves in the cylinder at a high frequency, so that the overall length of the suspension shock absorber 1 is repeatedly compressed and stretched, in this process, the guide slide rod 7 is synchronously slid on the support 4, and the sliding plate 9 fixedly installed at the bottom end thereof is synchronously moved up and down in the ring-shaped box 8, in this scheme, the space below the sliding plate 9 is a non-sealed space, and the space above the sliding plate 9 changes the internal air pressure due to the movement of the sliding plate 9, since the first cooling air hole 10 is always located in the ring-shaped box 8, the high-frequency change of the air pressure in this space directly acts on the second cooling air hole 11 under the conduction of the cavity in the guide slide rod 7, and the airflow blown by the slightly lower second cooling air hole 11 directly acts on the cylinder and realizes airflow cooling, which is suitable for the case that the airflow strength is not enough to cool the suspension shock absorber 1 when the automobile drives at low speed.

[0041] And the embodiment further discloses the following contents, specifically still as Figure 4As shown, the heavy truck is running in the process of complex road surface, it is easy to splash the small stones and other particulate matter in the road surface into the sealing protective rubber sleeve 6, the sealing protective rubber sleeve 6 is compressed and deformed repeatedly, which is another main reason for the damage of the sealing protective rubber sleeve 6 in the prior art. Therefore, the following content is disclosed in the present scheme: the second cooling air hole 11 is vertically distributed on the upper half of the guide slide rod 7, and the plurality of cooling air holes are respectively directed to the surface of the cylinder of the suspension shock absorber 1 and the sealing protective rubber sleeve 6. The second cooling air hole 11 is also distributed near the sealing protective rubber sleeve 6, so that the high-pressure pulse airflow is generated, which will act on the sealing protective rubber sleeve 6 accordingly. Therefore, the stones and other particles that may be left on the sealing protective rubber sleeve 6 will loosen under the influence of the airflow and be more easily dropped due to the driving of the vehicle, thereby improving the protection effect of the sealing protective rubber sleeve 6 and the whole suspension shock absorber 1.

[0042] Embodiment two: another cooling mechanism is disclosed in the present embodiment, which can exist simultaneously with the above-mentioned scheme and achieve better heat dissipation effect, but is limited by cost. One of the schemes can achieve good effect, such as Figures 5-8 As shown, the cooling mechanism further comprises a metal sheet 13 arranged between the suspension shock absorber 1 and the elastic member 2. The metal sheet 13 is distributed at equal angles about 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 and forms a heat dissipation fin structure. The upper half of the metal sheet 13 is attached to the outside of the sealing protective rubber sleeve 6, and the attachment edge of the metal sheet 13 and the sealing protective rubber sleeve 6 is a multi-bend structure. When the lower half of the metal sheet 13 is tightly attached to the cylinder of the suspension shock absorber 1, it can utilize the high heat conduction effect of the metal itself to improve the heat dissipation and cooling performance. On the other hand, the flexible structure at the top end can bend and deform synchronously when the whole suspension shock absorber 1 is compressed and deformed. By utilizing this deformation process and the design of the relative nonlinear structure on the inner surface of the metal sheet 13, an auxiliary cleaning effect on the sealing protective rubber sleeve 6 can be achieved. In addition, when the sealing protective rubber sleeve 6 is broken, the airflow generated by the space surrounded by the sealing protective rubber sleeve 6 will act on the metal sheet 13 during the compression of the whole suspension, thereby producing a specific frequency sound to facilitate the daily maintenance work of the staff.

[0043] As further disclosed in the above embodiments, such as Figures 9-10The shown cooling mechanism includes at least two connecting pipes 12, wherein the plurality of connecting pipes 12 are in communication with a cooling space inside the suspension shock absorber 1, the cooling space is a gas cavity 14 opened in the guide rod inside the suspension shock absorber 1, the bottom ends of the plurality of connecting pipes 12 are respectively communicated in the internal space of the annular box 8 above and below the sliding plate 9, wherein the up and down movement of the sliding plate 9 makes the gas flow in the gas cavity 14 and the annular box 8 reciprocatingly transfer through the connecting pipe 12 and exchanges heat with the outside through the plurality of connecting pipes 12, the bottom ends of the plurality of connecting pipes 12 are communicated in the internal space of the annular box 8 above or below the sliding plate 9, wherein the gas cavity 14 is communicated with the outside through a pipe penetrating the sealing protective rubber sleeve 6, the above scheme includes two cases, but both cases use the movement of the guide sliding rod 7 and the sliding plate 9 to generate the gas flow conveying effect, the same as the above embodiment is that the gas flow still acts on the suspension shock absorber 1, and different is that the oil liquid is more directly and comprehensively heat-conducted and cooled from the inside of the suspension shock absorber 1, the movement of the sliding plate 9 makes the gas flow in the space above or below it enter the gas cavity 14 through the connecting pipe 12, one of the schemes is to discharge the gas flow squeezed out from the gas cavity 14 to the other side space of the annular box 8, and the other scheme is to directly discharge the gas flow from the outside of the sealing protective rubber sleeve 6, and no matter which one can achieve a better heat-conduction and cooling effect.

[0044] It should be understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is a simplified description for the convenience of describing the present application, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the protection scope of the present application. The standard parts used in the present application can be purchased from the market, and the special-shaped parts can be ordered according to the description and drawings. The specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art. The mechanical parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

[0045] Although embodiments of the present application have been shown and described, it is to be understood that the embodiments are not limiting, but are susceptible to various modifications, alternatives and equivalents without departing from the spirit and scope of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-stress spring suspension for new energy heavy-duty trucks, comprising a suspension damper (1) and an elastic member (2) surrounding the periphery of the suspension damper (1), wherein the top end of the suspension damper (1) is rotatably installed on the frame (3) through a hinged seat, and the bottom end of the suspension damper (1) is rotatably installed on the lower swing arm pin shaft (5) through a support (4), wherein the suspension damper (1) further comprises a sealing protective rubber sleeve (6) arranged outside the guide shaft, characterized in that: The suspension shock absorber (1) is further provided with a cooling mechanism, wherein the cooling mechanism cools the suspension shock absorber (1) through air flow generated by compression and rebound of the suspension shock absorber (1); ​ The cooling mechanism comprises a guide slide rod (7) slidingly installed on the support (4), and the bottom end of the guide slide rod (7) is fixed to the upper end surface of a sliding plate (9), wherein the sliding plate (9) is vertically slidingly installed in a ring-shaped box (8) fixed to the lower end surface of the support (4); The compression and rebound of the suspension shock absorber (1) drives the sliding plate (9) to vertically move in the ring-shaped box (8) through the guide slide rod (7), so as to generate air flow and act on the suspension shock absorber (1). The space below the sliding plate (9) is a non-sealed space, and the space above the sliding plate (9) is in communication with a first cooling air hole (10) formed in the guide slide rod (7), wherein the first cooling air hole (10) is in communication with a second cooling air hole (11) formed in the upper half of the guide slide rod (7) through a cavity formed in the guide slide rod (7). The second cooling air hole (11) is vertically distributed on the upper half of the guide slide rod (7), and a plurality of the cooling air holes are respectively directed to the surface of the cylinder of the suspension shock absorber (1) and the sealing protective rubber sleeve (6). 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 equally angularly distributed about 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) and forms a heat dissipation fin structure. The upper half of the flexible section of the metal sheet (13) is attached to the outside of the sealing protective rubber sleeve (6), and the attachment edge of the metal sheet (13) and the sealing protective rubber sleeve (6) is a multi-bend structure. When the sealing protective rubber sleeve (6) is compressed and deformed, the metal sheet (13) removes the crevice impurities through the scraping action of the multi-bend structure, and generates an acoustic signal through air flow impact when the rubber sleeve is damaged to assist in locating the damage.

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

3. The high stress spring suspension for new energy heavy-duty truck according to claim 2, characterized in that: The bottom ends of the plurality of connecting pipes (12) are respectively in communication with the internal space of the ring-shaped box (8) above and below the sliding plate (9), wherein the upward and downward movement of the sliding plate (9) causes the air flow in the air cavity (14) and the ring-shaped box (8) to reciprocatingly transfer through the connecting pipes (12) and exchange heat with the outside through the plurality of connecting pipes (12).

4. The high-stress spring suspension for new energy heavy-duty truck according to claim 3, characterized in that: The bottom ends of the plurality of connecting pipes (12) are respectively in communication with the internal space of the ring-shaped box (8) above and below the sliding plate (9), wherein the air cavity (14) is in communication with the outside through a pipe penetrating the sealing protective rubber sleeve (6).

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