Suspension system and coal car

Abstract

The invention relates to the technical field of coal cars, in particular to a suspension system and a coal car. The suspension system comprises a first suspension cylinder, a second suspension cylinder and an energy accumulator, the first end of the first suspension cylinder is movably connected with an upper front frame of the coal car, and the second end of the first suspension cylinder is movably connected with a steering knuckle; the first end of the second suspension cylinder is movably connected with the upper front frame, the second end of the second suspension cylinder is movably connected with the steering knuckle, and the second suspension cylinder and the first suspension cylinder are symmetrically arranged relative to the longitudinal center line of the steering knuckle; the energy accumulator is connected with the first suspension cylinder and the second suspension cylinder and used for keeping the internal pressure of the first suspension cylinder and the internal pressure of the second suspension cylinder identical. The suspension system provided by the invention can relieve direct impact on the coal car due to uneven roads, and when the coal car is steered, full-loaded or heavy-loaded, the arrangement of buffering force provided by the suspension system can reduce abrasion to tires, the service life of the tires is prolonged, and long-term stable work of the coal car is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of coal trucks, and in particular to a suspension system and a coal truck. Background Art

[0002] At present, underground coal trucks mostly use a method of rigidly connecting the front wheels, reducers, motors, etc. with the front frame. Therefore, the front wheels, reducers, motors, etc. on the existing underground coal trucks are rigidly connected to the front frame, which leads to the problem that the vibration impact from the road cannot be buffered, which in turn leads to the problem of poor driving experience of the underground coal truck; in addition, when the underground coal truck is turning, fully loaded or heavily loaded, the rigid connection will also increase the wear on the tires, thereby reducing the service life of the tires, which is not conducive to the long-term stable operation of the underground coal truck. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, the present invention provides a suspension system that can alleviate the direct impact of uneven roads on coal trucks. When the coal truck is turning, fully loaded or heavily loaded, the buffering force provided by the suspension system can reduce the wear on the tires, increase the service life of the tires, and facilitate the long-term stable operation of the coal truck.

[0005] The present invention also provides a coal transport vehicle comprising the above suspension system.

[0006] A suspension system according to an embodiment of the first aspect of the present invention is applied to a coal truck, comprising: a first suspension cylinder, a first end of which is movably connected to the upper front frame of the coal truck, and a second end of which is movably connected to the steering knuckle; A second suspension cylinder, a first end of which is movably connected to the upper front frame, a second end of which is movably connected to the steering knuckle, and the second suspension cylinder and the first suspension cylinder are symmetrically arranged relative to the longitudinal center line of the steering knuckle; The accumulator is connected to both the first suspension cylinder and the second suspension cylinder and is used to keep the internal pressures of the first suspension cylinder and the second suspension cylinder the same.

[0007] Optionally, the first suspension cylinder and the second suspension cylinder are both arranged to be inclined toward the vertical center line of the coal truck.

[0008] Optionally, the angles between the first suspension cylinder and the second suspension cylinder and the vertical center line of the coal truck are both 3° to 10°.

[0009] Optionally, the accumulator is located on the longitudinal center line of the steering knuckle, and the length of a first connecting pipeline between the accumulator and the first suspension cylinder is the same as the length of a second connecting pipeline between the accumulator and the second suspension cylinder.

[0010] Optionally, it also includes: A first H-arm comprises a first transverse arm and two first longitudinal arms, wherein both ends of the first transverse arm are respectively connected to a first longitudinal arm; a first end of the first longitudinal arm is movably connected to a steering knuckle, and a second end of the first longitudinal arm is movably connected to an upper front frame; The second H-arm is located below the first H-arm; the second H-arm includes a second transverse arm and two second longitudinal arms, both ends of the second transverse arm are respectively connected to a second longitudinal arm, and the first end of the second longitudinal arm is movably connected to the steering knuckle, and the second end of the second longitudinal arm is movably connected to the lower front frame of the coal truck.

[0011] Optionally, the first longitudinal arm of the first H-arm is arranged in parallel with the transverse center line of the first transverse arm; the second longitudinal arm of the second H-arm is arranged at a preset angle with the transverse center line of the second transverse arm.

[0012] Optionally, the second longitudinal arm gradually inclines from the first end to the second end thereof toward a transverse center line away from the second transverse arm along a preset angle.

[0013] Optionally, the first end of the first suspension cylinder and / or the first end of the second suspension cylinder are both movably connected to the upper front frame through a first connecting assembly, and the first connecting assembly includes a first ear plate, a first joint bearing and a first connecting plate pin; The first ear plate is located at a first end of the first suspension cylinder and / or the second suspension cylinder; The first connecting plate pin is used to install the first joint bearing on the upper front frame; The first joint bearing is used to cooperate with the first ear plate on the first suspension cylinder or the first ear plate on the second suspension cylinder to flexibly connect the first end of the first suspension cylinder or the second suspension cylinder to the upper front frame.

[0014] Optionally, the second end of the first suspension cylinder and / or the second end of the second suspension cylinder are both movably connected to the steering knuckle via a second connecting assembly, and the second connecting assembly includes a second ear plate, a second joint bearing and a second plate pin; The second ear plate is located at the second end of the first suspension cylinder and / or the second suspension cylinder; The second connecting plate pin is used to install the second joint bearing on the steering knuckle; The second joint bearing is used to cooperate with the second ear plate on the first suspension cylinder or the second ear plate on the second suspension cylinder to flexibly connect the second end of the first suspension cylinder or the second suspension cylinder to the steering knuckle.

[0015] A coal truck according to an embodiment of the second aspect of the present invention comprises the suspension system of the first aspect or each embodiment.

[0016] One of the above technical solutions has at least the following advantages or beneficial effects: For a suspension system of an embodiment of the present invention, by selecting a suspension system including a first suspension cylinder, a second suspension cylinder and an accumulator, and symmetrically arranging the first suspension cylinder and the second suspension cylinder relative to the longitudinal center line of the steering knuckle, and connecting the accumulator to both the first suspension cylinder and the second suspension cylinder, the first suspension cylinder and the second suspension cylinder maintain the same internal pressure under the action of the accumulator, so that the front wheels on the coal truck equipped with the suspension system can alleviate the direct impact of the coal truck caused by uneven roads under the up and down movement of the first suspension cylinder and the second suspension cylinder, and when the coal truck is turning, fully loaded or heavily loaded, the buffering force provided by the suspension system can reduce the wear on the tires, increase the service life of the tires, and facilitate the long-term stable operation of the coal truck.

[0017] The coal truck provided in the embodiment of the present invention is provided with the above-mentioned suspension system. Since the suspension system has the above-mentioned technical effects, the coal truck provided with the suspension system should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the installation of a suspension system according to an embodiment of the present invention is shown; Figure 2 A schematic diagram showing the installation of a suspension system according to another embodiment of the present invention is shown; Figure 3 A schematic structural diagram of a suspension system according to an embodiment of the present invention is shown; Figure 4 A schematic structural diagram of a suspension system according to another embodiment of the present invention is shown.

[0019] [Description of Reference Numerals] 1. first suspension cylinder, 101. first cylinder barrel, 102. first piston rod; 2. Second suspension cylinder, 201. Second cylinder barrel, 202. Second piston rod; 3. Accumulator; 4. Go up to the front frame; 5. Steering knuckle; 6. Lower the front frame; 7. The first connecting pipeline; 8. Second connecting pipeline; 9. first H arm, 901. first transverse arm, 902. first longitudinal arm; 10. second H arm, 1001. second transverse arm, 1002. second longitudinal arm; 11. Wheel drive system, 1101. Wheel reducer, 1102. Parallel shaft reducer; 12. First ear plate; 13. The first joint bearing; 14. First connecting plate pin; 15. Second ear plate; 16. Second joint bearing; 17. Second connecting plate pin; 18. The fourth ear plate. DETAILED DESCRIPTION

[0020] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0021] Underground coal trucks are important transportation equipment for underground mining. They are generally used in conjunction with continuous miners, crushers, belt conveyors, etc., and serve as a bridge for transporting materials from the continuous miner to the crusher.

[0022] At present, underground coal trucks mostly use a method of rigidly connecting the front wheels, reducers, motors, etc. to the front frame, which has a simple structure and reliable connection. However, the front wheels, reducers, motors, etc. of existing underground coal trucks are rigidly connected to the front frame, which will cause the vibration impact from the road and cannot be buffered, thereby causing the problem of poor driving experience of the underground coal truck. At the same time, the vehicle will also be unable to buffer the fatigue damage of the accelerator's electrical, hydraulic and other related connection joints. In addition, when the underground coal truck is turning, fully loaded or heavily loaded, the rigid connection will also increase the wear on the tires, reducing the service life of the tires, which is not conducive to the long-term stable operation of the underground coal truck.

[0023] In order to solve at least one of the technical problems existing in the prior art or related art, the present invention provides a suspension system, which includes a first suspension cylinder, a second suspension cylinder and an accumulator, wherein the first end of the first suspension cylinder is movably connected to the upper front frame of the coal truck, and the second end of the first suspension cylinder is movably connected to the steering knuckle; the first end of the second suspension cylinder is movably connected to the upper front frame, and the second end of the second suspension cylinder is movably connected to the steering knuckle, and the second suspension cylinder and the first suspension cylinder are symmetrically arranged relative to the longitudinal center line of the steering knuckle; the accumulator is connected to both the first suspension cylinder and the second suspension cylinder, and is used to keep the internal pressures of the first suspension cylinder and the second suspension cylinder the same. The present invention selects a suspension system including a first suspension cylinder, a second suspension cylinder and an accumulator, and arranges the first suspension cylinder and the second suspension cylinder symmetrically with respect to the longitudinal center line of the steering knuckle, and connects the accumulator to both the first suspension cylinder and the second suspension cylinder, so that the internal pressures of the first suspension cylinder and the second suspension cylinder are kept the same under the action of the accumulator, thereby enabling the front wheels of the coal truck provided with the suspension system to alleviate the direct impact of the coal truck caused by uneven roads under the up and down movement of the first suspension cylinder and the second suspension cylinder, and when the coal truck is turning, fully loaded or heavily loaded, the buffering force provided by the suspension system can reduce the wear on the tires, increase the service life of the tires, and facilitate the long-term stable operation of the coal truck.

[0024] The following describes a suspension system and a coal truck according to some embodiments of the present invention with reference to the accompanying drawings.

[0025] See also Figures 1 to 4 A suspension system provided by the present invention is applied to a coal truck; the suspension system comprises a first suspension cylinder 1, a second suspension cylinder 2 and an accumulator 3, a first end of the first suspension cylinder 1 is movably connected to an upper front frame 4 of the coal truck, and a second end of the first suspension cylinder 1 is movably connected to a steering knuckle 5; a first end of the second suspension cylinder 2 is movably connected to the upper front frame 4, and a second end of the second suspension cylinder 2 is movably connected to the steering knuckle 5, and the second suspension cylinder 2 and the first suspension cylinder 1 are symmetrically arranged relative to a longitudinal center line of the steering knuckle 5; the accumulator 3 is connected to both the first suspension cylinder 1 and the second suspension cylinder 2, and is used to keep the internal pressures of the first suspension cylinder 1 and the second suspension cylinder 2 the same.

[0026] Here, the front frame of the coal truck includes an upper front frame 4 and a lower front frame 6, the lower front frame 6 is located below the upper front frame 4, the upper front frame 4 is movably connected to the upper part of the steering knuckle 5, and the lower front frame 6 is movably connected to the lower part of the steering knuckle 5; when the coal truck is directly impacted by an uneven road, the vertical load on the front frame due to the impact of the road can be transmitted to the steering knuckle 5 through the first suspension cylinder 1 and the second suspension cylinder 2 movably connected to the upper front frame 4, thereby transmitting the vertical load to the tire.

[0027] It should be noted that when the suspension system of the present application is installed on a coal truck, a suspension system is installed on both sides of the front frame of the coal truck, and the two suspension systems are symmetrically arranged relative to the longitudinal center line of the coal truck, so that the two suspension systems installed on the coal truck provide the same buffering force on the two front wheels to alleviate the direct impact of the coal truck due to uneven roads, thereby keeping the wheels of the coal truck always parallel to the longitudinal center line of the coal truck.

[0028] In this embodiment, by selecting a suspension system including a first suspension cylinder 1, a second suspension cylinder 2 and an accumulator 3, and symmetrically arranging the first suspension cylinder 1 and the second suspension cylinder 2 relative to the longitudinal center line of the steering knuckle 5, and connecting the accumulator 3 to both the first suspension cylinder 1 and the second suspension cylinder 2, the first suspension cylinder 1 and the second suspension cylinder 2 are kept at the same internal pressure under the action of the accumulator 3, so that the front wheels of the coal truck provided with the suspension system can alleviate the direct impact of the coal truck caused by uneven roads under the up and down movement of the first suspension cylinder 1 and the second suspension cylinder 2, and when the coal truck is turning, fully loaded or heavily loaded, the buffering force provided by the suspension system can reduce the wear on the tires, increase the service life of the tires, and facilitate the long-term stable operation of the coal truck; it can be seen that the suspension system provided in the present application can not only improve the driving experience of the coal truck, but also improve the working reliability of the coal truck.

[0029] In addition, by arranging the second suspension cylinder 2 and the first suspension cylinder 1 symmetrically relative to the longitudinal center line of the steering knuckle 5, not only can the first suspension cylinder 1 and the second suspension cylinder 2 be reasonably allocated in the spatial layout, but also the distance limitation between the wheel and the front frame, and the distance limitation between the plane on the front frame and the center line of the front wheel can be effectively solved through the double suspension cylinder structure, and the overall layout requirements of the coal truck can be met with a smaller suspension cylinder diameter and a shorter installation distance.

[0030] In some possible embodiments, the first suspension cylinder 1 and the second suspension cylinder 2 are both arranged to be inclined toward the vertical center line of the coal truck.

[0031] Since a suspension system is provided on both sides of the front frame of the coal truck, the first suspension cylinder 1 and the second suspension cylinder 2 located on both sides of the front frame are inclined toward the vertical center line of the coal truck. Therefore, the first suspension cylinder 1 and the second suspension cylinder 2 in the two suspension systems located on the coal truck are arranged in a narrow upper and wide lower form on the upper layer of the coal truck to improve the running stability of the whole vehicle of the coal truck when it is heavily loaded.

[0032] Furthermore, the included angles between the first suspension cylinder 1 and the second suspension cylinder 2 and the vertical center line of the coal truck are both 3° to 10°.

[0033] Among them, the angles between the first suspension cylinder 1 and the second suspension cylinder 2 and the vertical center line of the coal truck can be, but are not limited to, one of 3°, 4°, 5°, 6°, 7°, 8°, 9° and 10°; preferably, the angles between the first suspension cylinder 1 and the second suspension cylinder 2 and the vertical center line of the coal truck are both 5°.

[0034] In some possible embodiments, the accumulator 3 is located on the longitudinal center line of the steering knuckle 5 , and the length of the first connecting line 7 between the accumulator 3 and the first suspension cylinder 1 is the same as the length of the second connecting line 8 between the accumulator 3 and the second suspension cylinder 2 .

[0035] Here, the accumulator 3 can be installed on the upper front frame 4, and the distance between the accumulator 3 and the first suspension cylinder 1 is the same as the distance between the accumulator 3 and the second suspension cylinder 2, so that the length of the first connecting pipeline 7 used to connect the accumulator 3 and the first suspension cylinder 1 can be the same as the length of the second connecting pipeline 8 used to connect the accumulator 3 and the second suspension cylinder 2.

[0036] In this embodiment, the accumulator 3 is arranged on the longitudinal center line of the steering knuckle 5 so that the distance between the accumulator 3 and the first suspension cylinder 1 is the same as the distance between the accumulator 3 and the second suspension cylinder 2. Then, the accumulator 3 is connected to the first suspension cylinder 1 and the accumulator 3 is connected to the second suspension cylinder 2 through the first connecting pipe 7 and the second connecting pipe 8 of the same length, respectively, so as to keep the internal pressure of the first suspension cylinder 1 and the internal pressure of the second suspension cylinder 2 equal, so that the suspension system can evenly support the upper front frame 4 and the steering knuckle 5.

[0037] In some possible embodiments, the suspension system also includes a first H-arm 9 and a second H-arm 10, the first H-arm 9 includes a first transverse arm 901 and two first longitudinal arms 902, and the two ends of the first transverse arm 901 are respectively connected to a first longitudinal arm 902; the first end of the first longitudinal arm 902 is movably connected to the steering knuckle 5, and the second end of the first longitudinal arm 902 is movably connected to the upper front frame 4; the second H-arm 10 is located below the first H-arm 9; the second H-arm 10 includes a second transverse arm 1001 and two second longitudinal arms 1002, the two ends of the second transverse arm 1001 are respectively connected to a second longitudinal arm 1002, and the first end of the second longitudinal arm 1002 is movably connected to the steering knuckle 5, and the second end of the second longitudinal arm 1002 is movably connected to the lower front frame 6 of the coal truck.

[0038] It should be noted that after the two suspension systems are installed on the coal truck, the first H-arms 9 in the two suspension systems are symmetrically arranged relative to the longitudinal center line of the coal truck; the second H-arms 10 in the two suspension systems are symmetrically arranged relative to the longitudinal center line of the coal truck; wherein, the first cross arm 901 in the first H-arm 9 and the second cross arm 1001 in the second H-arm 10 are both arranged parallel to the transverse center line of the coal truck.

[0039] Here, the second H arm 10 is located below the first suspension cylinder 1 and the second suspension cylinder 2; after the wheel-side drive system 11 is connected to the steering knuckle 5, the wheel-side reducer 1101 in the wheel-side drive system 11 is installed on the side of the steering knuckle 5 away from the front frame, and the parallel axis reducer 1102 in the wheel-side drive system 11 is installed on the side of the steering knuckle 5 close to the front frame, the first H arm 9 is located above the parallel axis reducer 1102, and the second H arm 10 is located below the parallel axis reducer 1102.

[0040] In this embodiment, a double H-arm connection structure of a first H-arm 9 and a second H-arm 10 is adopted on both sides of the front frame, and the first end of the first longitudinal arm 902 in the first H-arm 9 is movably connected to the steering knuckle 5, and the second end of the first longitudinal arm 902 is movably connected to the upper front frame 4, and the first end of the second longitudinal arm 1002 in the second H-arm 10 is movably connected to the steering knuckle 5, and the second end of the second longitudinal arm 1002 is movably connected to the lower front frame 6. The wheel-side drive system 11 installed on the steering knuckle 5 can be swung up and down relative to the front frame to achieve the purpose of shock absorption and noise reduction of the front frame and the wheel-side drive system 11. At the same time, the double H-arm connection structure can also meet the strength requirements under working conditions such as vertical impact, extreme braking, extreme steering and steering braking downhill.

[0041] Furthermore, the first longitudinal arm 902 of the first H arm 9 is arranged parallel to the transverse center line of the first cross arm 901 ; the second longitudinal arm 1002 of the second H arm 10 is arranged at a preset angle to the transverse center line of the second cross arm 1001 .

[0042] Here, after the first longitudinal arm 902 is connected to the upper front frame 4 and the steering knuckle 5, the length direction of the first longitudinal arm 902 is parallel to the transverse center line of the coal truck; after the second longitudinal arm 1002 is connected to the lower front frame 6 and the steering knuckle 5, the length direction of the second longitudinal arm 1002 is set at a preset angle to the transverse center line of the coal truck.

[0043] In this embodiment, by setting the second longitudinal arm 1002 of the second H arm 10 at a preset angle with the lateral center line of the second cross arm 1001, the second H arm 10 itself has a special-shaped structure to increase the space between the two second longitudinal arms 1002, thereby providing sufficient space for the installation of the wheel-side drive system 11.

[0044] Furthermore, the second longitudinal arm 1002 gradually tilts from its first end to its second end toward a transverse center line away from the second cross arm 1001 along a preset angle.

[0045] Here, the preset angle may be 10°~20°.

[0046] In this embodiment, the second longitudinal arm 1002 is gradually tilted from its first end to the second end away from the transverse center line of the second cross arm 1001 along a preset angle direction, so that after the second longitudinal arm 1002 is connected to the lower front frame 6 and the steering knuckle 5, the second longitudinal arm 1002 is gradually tilted from its first end to the second end away from the transverse center line of the coal truck along a preset angle direction, so that the distance between the first end of each second longitudinal arm 1002 in the second H arm 10 and the transverse center line of the coal truck is greater than the distance between the second end and the transverse center line of the coal truck, thereby increasing the open space between the second ends of the two second longitudinal arms 1002, and providing sufficient space for the installation of the wheel-side drive system 11 and the up and down swinging around the front frame.

[0047] In some possible embodiments, the first end of the first suspension cylinder 1 and / or the first end of the second suspension cylinder 2 are movably connected to the upper front frame 4 through a first connecting assembly, and the first connecting assembly includes a first ear plate 12, a first joint bearing 13 and a first connecting plate pin 14; the first ear plate 12 is located at the first end of the first suspension cylinder 1 and / or the second suspension cylinder 2; the first connecting plate pin 14 is used to install the first joint bearing 13 on the upper front frame 4; the first joint bearing 13 is used to cooperate with the first ear plate 12 on the first suspension cylinder 1, or the first ear plate 12 on the second suspension cylinder 2, so as to movably connect the first end of the first suspension cylinder 1 or the second suspension cylinder 2 to the upper front frame 4.

[0048] Here, the first suspension cylinder 1 includes a first cylinder 101 and a first piston rod 102. The first cylinder 101 is mounted on the first piston rod 102. The first piston rod 102 can reciprocate relative to the first cylinder 101 along its length direction. The first end of the first suspension cylinder 1 can be an end of the first cylinder 101 away from the free end of the first piston rod 102, and the second end of the first suspension cylinder 1 can be the free end of the first piston rod 102. Therefore, the first ear plate 1 is connected to the end of the first cylinder 101 away from the free end of the first piston rod 102. 2; The second suspension cylinder 2 includes a second cylinder 201 and a second piston rod 202, the second cylinder 201 is mounted on the second piston rod 202, and the second piston rod 202 can reciprocate relative to the second cylinder 201 along its length direction, wherein the first end of the second suspension cylinder 2 can be an end of the second cylinder 201 away from the free end of the second piston rod 202, and the second end of the second suspension cylinder 2 can be the free end of the second piston rod 202, therefore, here the first ear plate 12 is connected to the end of the second cylinder 201 away from the free end of the second piston rod 202.

[0049] It should be noted that two third ear plates are arranged in parallel on the upper front frame 4. When the first end of the first suspension cylinder 1 or the first end of the second suspension cylinder 2 is movably connected to the upper front frame 4, the first ear plate 12 is first placed between the two third ear plates, and then the first joint bearing 13 is passed through a third ear plate, the first ear plate 12 and another third ear plate in sequence, and then the first joint bearing 13 is fixed to the third ear plate by using the first connecting plate pin 14 to complete the installation of the first joint bearing 13 on the upper front frame 4.

[0050] In this embodiment, by selecting the structure of the first connecting component as the first ear plate 12, the first spherical bearing 13 and the first connecting plate pin 14, the first end of the first suspension cylinder 1 and the first end of the second suspension cylinder 2 can be movably connected to the upper front frame 4 through the first connecting component, and the first end of the first suspension cylinder 1 and the first end of the second suspension cylinder 2 can respectively rotate around the first spherical bearing 13 connected thereto respectively, thereby realizing that the vertical load related to the upper front frame 4 can be transmitted to the steering knuckle 5 through the first suspension cylinder 1 and the second suspension cylinder 2.

[0051] In some possible embodiments, the second end of the first suspension cylinder 1 and / or the second end of the second suspension cylinder 2 are movably connected to the steering knuckle 5 via a second connecting assembly, and the second connecting assembly includes a second ear plate 15, a second joint bearing 16 and a second connecting plate pin 17; the second ear plate 15 is located at the second end of the first suspension cylinder 1 and / or the second suspension cylinder 2; the second connecting plate pin is used to install the second joint bearing 16 on the steering knuckle 5; the second joint bearing 16 is used to cooperate with the second ear plate 15 on the first suspension cylinder 1, or the second ear plate 15 on the second suspension cylinder 2, so as to movably connect the second end of the first suspension cylinder 1 or the second suspension cylinder 2 to the steering knuckle 5.

[0052] It should be noted that two fourth ear plates 18 arranged in parallel are provided on the steering knuckle 5. When the second end of the first suspension cylinder 1 or the second end of the second suspension cylinder 2 is movably connected to the steering knuckle 5, the second ear plate 15 is first placed between the two fourth ear plates 18, and then the second joint bearing 16 is passed through a fourth ear plate 18, the second ear plate 15 and the other fourth ear plate 18 in sequence, and then the second joint bearing 16 is fixed to the fourth ear plate 18 by using the second connecting plate pin to complete the installation of the second joint bearing 16 on the steering knuckle 5.

[0053] In this embodiment, by selecting the second ear plate 15, the second spherical bearing 16 and the second connecting plate pin 17 as the structure of the second connecting component, the second end of the first suspension cylinder 1 and the second end of the second suspension cylinder 2 can be movably connected to the steering knuckle 5 through the second connecting component, and the second end of the first suspension cylinder 1 and the second end of the second suspension cylinder 2 can respectively rotate around the second spherical bearing 16 connected to them respectively, so as to realize that the vertical load related to the upper front frame 4 can be transmitted to the steering knuckle 5 through the first suspension cylinder 1 and the second suspension cylinder 2.

[0054] A coal truck according to an embodiment of the present invention comprises the suspension system according to any one of the above embodiments.

[0055] Since the coal truck of this embodiment includes any suspension system in the first aspect described above, it has the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0056] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0059] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "exemplary embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0060] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A suspension system, applied to a coal truck, characterized in that: include: a first suspension cylinder, a first end of which is movably connected to the upper front frame of the coal truck, and a second end of which is movably connected to the steering knuckle; a second suspension cylinder, a first end of which is movably connected to the upper front frame, a second end of which is movably connected to the steering knuckle, and the second suspension cylinder and the first suspension cylinder are symmetrically arranged relative to the longitudinal center line of the steering knuckle; The accumulator is connected to both the first suspension cylinder and the second suspension cylinder, and is used to keep the internal pressures of the first suspension cylinder and the second suspension cylinder the same.

2. The suspension system according to claim 1, characterized in that: The first suspension cylinder and the second suspension cylinder are both arranged to be inclined toward the vertical center line of the coal truck.

3. The suspension system according to claim 2, characterized in that: The included angles between the first suspension cylinder, the second suspension cylinder and the vertical center line of the coal truck are both 3° to 10°.

4. The suspension system according to claim 1, characterized in that: The accumulator is located on the longitudinal center line of the steering knuckle, and the length of a first connecting pipeline between the accumulator and the first suspension cylinder is the same as the length of a second connecting pipeline between the accumulator and the second suspension cylinder.

5. The suspension system according to claim 1, characterized in that: Also includes: A first H-arm, comprising a first transverse arm and two first longitudinal arms, wherein two ends of the first transverse arm are respectively connected to one of the first longitudinal arms; The first end of the first longitudinal arm is movably connected to the steering knuckle, and the second end of the first longitudinal arm is movably connected to the upper front frame; The second H-arm is located below the first H-arm; the second H-arm includes a second transverse arm and two second longitudinal arms, both ends of the second transverse arm are respectively connected to one of the second longitudinal arms, and the first end of the second longitudinal arm is movably connected to the steering knuckle, and the second end of the second longitudinal arm is movably connected to the lower front frame of the coal truck.

6. The suspension system according to claim 5, characterized in that: The first longitudinal arm of the first H-arm is arranged parallel to the transverse center line of the first transverse arm; the second longitudinal arm of the second H-arm is arranged at a preset angle to the transverse center line of the second transverse arm.

7. The suspension system according to claim 6, characterized in that: The second longitudinal arm gradually inclines from the first end to the second end thereof toward a transverse center line away from the second transverse arm along the direction of the preset angle.

8. The suspension system according to claim 1, characterized in that: The first end of the first suspension cylinder and / or the first end of the second suspension cylinder are both movably connected to the upper front frame through a first connecting assembly, wherein the first connecting assembly includes a first ear plate, a first joint bearing and a first connecting plate pin; The first ear plate is located at a first end of the first suspension cylinder and / or the second suspension cylinder; The first connecting plate pin is used to install the first spherical bearing on the upper front frame; The first joint bearing is used to cooperate with the first ear plate on the first suspension cylinder or the first ear plate on the second suspension cylinder to movably connect the first end of the first suspension cylinder or the second suspension cylinder to the upper front frame.

9. The suspension system according to claim 1, characterized in that: The second end of the first suspension cylinder and / or the second end of the second suspension cylinder are both movably connected to the steering knuckle via a second connecting assembly, wherein the second connecting assembly includes a second ear plate, a second joint bearing and a second plate pin; The second ear plate is located at the second end of the first suspension cylinder and / or the second suspension cylinder; The second connecting plate pin is used to install the second spherical bearing on the steering knuckle; The second joint bearing is used to cooperate with the second ear plate on the first suspension cylinder or the second ear plate on the second suspension cylinder to flexibly connect the second end of the first suspension cylinder or the second suspension cylinder to the steering knuckle.

10. A coal transport vehicle, characterized in that: Comprising a suspension system as claimed in any one of claims 1 to 9.

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