Damping device for chassis cross beam of touring car

Abstract

The invention discloses a touring car chassis cross beam damping device, which relates to the technical field of touring cars, and comprises a cross beam I, a cross beam II, a swing arm, a circular truncated cone, a damping mechanism, a hydraulic cylinder, a hydraulic cylinder, a hydraulic cylinder, a hydraulic cylinder and a damping mechanism, the piston rod extends into the hydraulic cylinder and is in sliding connection with the hydraulic cylinder, the second winding disc pulls the first winding disc to rotate, the first winding disc is connected with the first winding rod through a one-way damping bearing, the first winding rod is made to rotate through the damping effect, and the first winding rod rotates to drive the first traction rope to conduct winding. And at the moment, the first traction rope pulls a second arc-shaped scraper to ascend, the second arc-shaped scraper is attached to the piston rod to ascend, dust on the outer side of the piston rod is stripped upwards, and therefore the effect of cleaning the piston rod is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of recreational vehicles, and in particular to a chassis crossbeam shock absorbing device for a recreational vehicle. Background Art

[0002] The suspension system of the RV makes an important contribution to improving the stability of the RV during driving. The suspension system of the RV acts on the tires, so that the suspension system absorbs and reduces the up and down movement from the tires, thereby reducing the swing transmission of the tires to the body. A motorhome chassis crossbeam shock-absorbing device disclosed in the patent application with reference publication number CN216424559U comprises a special-shaped chassis crossbeam, the special-shaped chassis crossbeam comprises crossbeam 1 and crossbeam 2, a spacing is set between crossbeam 1 and crossbeam 2, one end of the telescopic device away from the working end is hinged to crossbeam 1, the working end of the telescopic device is hinged to the top surface of the cylindrical truncated cone, the side of the cylindrical truncated cone is fixedly connected to one end of a connecting rod, the other end of the connecting rod is fixedly connected to one end of a swing arm, and the other end of the swing arm is hinged to crossbeam 2. The utility model provides a motorhome chassis crossbeam shock-absorbing device with a simple structure, low installation requirements, and easy integration.

[0003] In the above scheme, shock absorption is performed by adopting a telescopic device, while the hydraulic shock absorption or pneumatic shock absorption in the existing shock absorption devices are all exposed to the outside. During long-term use, there will inevitably be a large amount of dust and dirt on the outside, which will affect the shock absorption effect of the shock absorption device. It is too inconvenient if manual cleaning is required every time, and automatic cleaning cannot be achieved.

[0004] Therefore, it is necessary to provide a motorhome chassis crossbeam shock absorbing device to solve the above technical problems. Summary of the invention

[0005] The object of the present invention is to provide a motorhome chassis crossbeam shock absorbing device to solve the problems of the defects of the prior art mentioned in the above background technology.

[0006] Based on the above ideas, the present invention provides the following technical solutions: a shock absorbing device for a chassis cross beam of a motorhome, comprising a first cross beam, a second cross beam, a swing arm and a round table, wherein the round table is fixedly connected to the swing arm, and the swing arm is hingedly connected to the second cross beam, and further comprising: The shock absorbing mechanism includes a piston rod and a hydraulic cylinder. The piston rod extends into the interior of the hydraulic cylinder and is slidably connected to the hydraulic cylinder. One end of the hydraulic cylinder is fixedly connected to a connecting seat. One end of the connecting seat is hinged to the round table through a first support plate. One end of the piston rod is hinged to a second support plate cross beam. A buffer spring is provided between the connecting seat and the piston rod. A fixed cylinder is sleeved on the outside of the hydraulic cylinder, which is fixedly connected to the connecting seat, and a plurality of air jet grooves are opened on the outside of the fixed cylinder. A cleaning mechanism is arranged on the outside of the buffer spring for cleaning the buffer spring. The cleaning mechanism comprises a scraping assembly and a blowing assembly. A transmission part is arranged between the blowing assembly and the scraping assembly. When the piston rod moves, the scraping assembly is driven to rotate to clean the outside of the buffer spring, and at the same time, the blowing assembly is driven by the transmission part to blow and clean the buffer spring.

[0007] As a further solution of the present invention: the end of the piston rod away from the hydraulic cylinder is fixedly connected to a fixing column, and a spiral groove is provided on the outer side of the fixing column.

[0008] As a further solution of the present invention: the scraping assembly comprises: A first rotating ring, the first rotating ring is rotatably connected to one side of the connecting seat; A plurality of connecting plates, each of which is fixedly connected to the outside of the first rotating ring and is arranged in a ring shape around the center of the first rotating ring; A second rotating ring, the second rotating ring is fixedly connected to one end of the plurality of connecting plates, and the inner wall of the second rotating ring is fixedly connected to a plurality of connecting shafts, the second rotating ring is sleeved on the outside of the fixed column, and the plurality of connecting shafts extend to the inside of the spiral groove provided on the outside of the fixed column, and are slidably connected to the fixed column; A plurality of brush plates are respectively fixedly connected to the inner walls of the plurality of connecting plates and are in contact with the buffer springs for cleaning the buffer springs.

[0009] As a further solution of the present invention: the blowing assembly comprises: A lifting plate is arranged on the top of the connecting seat, and a foldable airbag is fixedly connected between the lifting plate and the connecting seat. A plurality of connecting tubes are fixedly connected to the bottom of the foldable airbag. The plurality of connecting tubes extend into the interior of the fixed tube and are used to blow air into the buffer spring. A one-way air outlet valve is arranged on the outside of the connecting tube, and a one-way air inlet valve is arranged on the outside of the foldable airbag.

[0010] As a further solution of the present invention: the transmission member includes: An inner gear ring, which is fixedly connected to the first rotating ring through a support rod and is arranged on the top of the connecting seat; A plurality of reciprocating screw rods are rotatably connected to the top of the connecting seat, the tops of the plurality of reciprocating screw rods are rotatably connected to a connecting plate, the plurality of reciprocating screw rods all penetrate the lifting plate and are connected to the lifting plate through a ball nut pair, and are used to drive the lifting plate to reciprocate and lift, so that the foldable airbag can be inflated and exhausted; A plurality of first gears are respectively fixedly connected to the outsides of the plurality of reciprocating screw rods, and the plurality of first gears are meshedly connected with the inner gear ring.

[0011] As a further solution of the present invention: the fixed cylinder is rotatably connected to a rotating disk near the top of one end of the piston rod, and a plurality of dust cleaning mechanisms are arranged on the top of the rotating disk. The plurality of dust cleaning mechanisms are arranged in a ring around the center of the piston rod. The dust cleaning mechanisms are used to clean the outer side of the part of the piston rod extending to the hydraulic cylinder, and the cleaning mechanisms include a stripping assembly and a receiving assembly.

[0012] As a further solution of the present invention: the receiving component comprises: A support frame is fixedly connected to the top of the rotating disk, a first annular scraper is provided on one side of the support frame, the first annular scraper is in contact with the outer side of the piston rod, a second fixed plate is fixedly connected to the outer side of the support frame, a second telescopic rod and a second spring are fixedly connected between the second fixed plate and the first annular scraper, and the second spring is sleeved on the outer side of the second telescopic rod; A second winding rod passes through the support frame, a third traction rope is wound around the outer side of the second winding rod, one end of the third traction rope is fixedly connected to the first annular scraper, and when the second winding rod rotates, the first annular scraper is pulled apart from the piston rod by winding up the third traction rope; Two second gears are fixedly connected to the two ends of the second winding rod respectively, the outer sides of the two second gears are meshed with racks, the bottoms of the two racks are connected to the support frame through elastic parts, and a push rod is fixedly connected between the two racks.

[0013] As a further solution of the present invention: the stripping assembly comprises: A second arc scraper is arranged on the top of the first annular scraper, and the second arc scraper is in contact with the outer side of the piston rod; A first fixing plate fixedly connected to one end of the support frame, a first telescopic rod and a first spring fixedly connected between the first fixing plate and the second arc-shaped scraper, and the first spring sleeved on the outside of the first telescopic rod; A first winding rod, the first winding rod passes through the support frame and is rotatably connected to the support frame, a first traction rope is wound around the outer side of the first winding rod, the first traction rope passes through the first fixing plate and is fixedly connected to the second arc scraper; A first winding disc is arranged at both ends of the first winding rod, the first winding disc is connected to the support frame through a torsion spring, and the first winding disc is connected to the first winding rod through a one-way bearing; A second winding drum is fixedly connected to one side of the second gear, and a second traction rope is wound and connected between the second winding drum and the first winding drum.

[0014] As a further solution of the present invention: a first magnetic ring is fixedly connected to the top of the rotating disk, and a second magnetic ring is fixedly connected to the outer side of the connecting plate. The second magnetic ring is magnetically attracted to the first magnetic ring, and when the second magnetic ring rotates, the first magnetic ring is driven to rotate by magnetic attraction.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The rotation of the second rotating ring drives the fixedly connected connecting plate to rotate. When the connecting plate rotates, the buffer spring is rotated and cleaned through the brush plate fixedly connected inside, so as to clean the dust and dirt on the outside of the buffer spring. The buffer spring is automatically cleaned every time the shock absorption buffering is performed.

[0016] 2. When the lifting plate rises, the foldable airbag expands through the one-way air intake valve. When the lifting plate descends, the gas inside the foldable airbag is discharged into the fixed tube through the connecting pipe, and the gas inside the fixed tube is discharged through the jet groove. The discharged gas jets to clean the buffer spring. When the brush plate is cleaning, the jets are coordinated to further clean the buffer spring, thereby ensuring the buffering effect and service life of the buffer spring.

[0017] 3. The second winding disc pulls and drives the second traction rope to be wound, thereby causing the first winding disc to rotate. The first winding disc is connected to the first winding rod through a one-way damping bearing. The first winding rod is rotated through the damping effect. The rotation of the first winding rod drives the first traction rope to be wound. At this time, the first traction rope pulls the second arc scraper to rise, and the second arc scraper rises in contact with the piston rod to peel off the dust on the outside of the piston rod upwards, thereby achieving the effect of cleaning the piston rod.

[0018] 4. At this time, the first winding drum is connected to the first traction rope through a one-way bearing, and the first winding drum will not affect the reversal of the first traction rope. The second arc scraper is quickly reset through the first spring and the first telescopic rod between the first fixed plate, and the first annular scraper contacts the bottom of the second arc scraper at the reset top to scrape off the dust on the top of the first annular scraper, so as to avoid the first annular scraper from bringing back the cleaned dust when resetting, thereby ensuring the effective cleaning of the gap between the piston rod and the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the fixed cylinder of the present invention; Figure 3 It is a schematic diagram of the structure of the fixed column of the present invention; Figure 4 It is a schematic diagram of the structure of the scraping assembly of the present invention; Figure 5 It is a schematic diagram of the structure of the blowing assembly of the present invention; Figure 6 It is a schematic diagram of the structure of the connecting plate of the present invention; Figure 7 It is a schematic diagram of the piston rod structure of the present invention; Figure 8 It is a schematic diagram of the structure of the rotating disk of the present invention; Fig. 9 It is a schematic diagram of the structure of the dust removal mechanism of the present invention; Fig.10 It is a schematic diagram of the structure of the stripping assembly of the present invention.

[0021] In the figure: 1, beam 1; 2, beam 2; 3, swing arm; 4, round table; 401, piston rod; 402, hydraulic cylinder; 403, connecting seat; 5, buffer spring; 601, fixed cylinder; 602, heat sink; 603, jet slot; 701, first rotating ring; 702, brush plate; 703, connecting plate; 704, second rotating ring; 7041, connecting shaft; 705, fixed column; 706, second magnetic ring; 801, inner gear ring; 802, lifting plate; 803, foldable airbag; 804, first gear; 805, reciprocating screw rod; 806, connecting plate; 9, rotating Disk; 900, first magnetic ring; 901, first annular scraper; 902, second arc scraper; 9021, first fixed plate; 9022, first winding rod; 9023, first winding disk; 9024, first telescopic rod; 9025, first spring; 9026, first traction rope; 9027, second traction rope; 903, support frame; 904, second fixed plate; 905, second telescopic rod; 906, second spring; 907, rack; 908, second gear; 909, second winding rod; 910, second winding disk; 911, third traction rope; 912, push rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0024] like Figures 1 to 10 As shown, a motorhome chassis crossbeam shock absorbing device includes the following embodiments: Embodiment 1: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a shock absorbing device for a chassis crossbeam of a motorhome comprises a crossbeam 1, a crossbeam 2, a swing arm 3 and a round platform 4, the round platform 4 is fixedly connected to the swing arm 3, the axle of the wheel is connected to the round platform 4, driving the round platform 4 to move up and down, the swing arm 3 is hingedly connected to the crossbeam 2, and further comprises: The shock absorbing mechanism includes a piston rod 401 and a hydraulic cylinder 402. The piston rod 401 extends into the interior of the hydraulic cylinder 402 and is slidably connected to the hydraulic cylinder 402. One end of the hydraulic cylinder 402 is fixedly connected to a connecting seat 403. One end of the connecting seat 403 is hinged to the round table 4 through a first support plate. One end of the piston rod 401 is hinged to the second support plate cross beam 1. A buffer spring 5 is provided between the connecting seat 403 and the piston rod 401. In specific implementation, the wheel axle is connected to the round table 4. When the wheel bumps up and down, the round table 4 performs shock absorption and buffering through the shock absorbing mechanism. The piston rod 401 moves inside the hydraulic cylinder 402. By squeezing the buffer oil inside the hydraulic cylinder 402, the common hydraulic buffer mechanism is adopted inside the hydraulic cylinder 402. When the mechanical system is subjected to impact force or vibration, the piston inside the hydraulic shock absorber will move, driving the liquid to flow in the sealed pipe, and the oil in the shock absorber cavity repeatedly flows from one cavity through the pores into another cavity. This is the existing related technology and will not be further elaborated here. In addition, a plurality of jet grooves 603 are arranged on the outside of the hydraulic cylinder 402. Heat is dissipated through the jet grooves 603 to ensure that the buffering effect caused by overheating of the buffer oil during buffering inside the hydraulic cylinder 402 is reduced. In addition, a buffer spring 5 is arranged between the connecting seat 403 and the piston rod 401. Buffering is performed by the buffer spring 5, so as to achieve a better shock absorption effect.

[0025] Embodiment 2: Figure 3 , Figure 4 and Figure 5 As shown, a fixed cylinder 601 is sleeved on the outside of the hydraulic cylinder 402, and the fixed cylinder 601 is fixedly connected to the connecting seat 403, and a plurality of jet grooves 603 are opened on the outside of the fixed cylinder 601. A cleaning mechanism is arranged on the outside of the buffer spring 5 for cleaning the buffer spring 5. The cleaning mechanism comprises a scraping assembly and a blowing assembly. A transmission part is arranged between the blowing assembly and the scraping assembly. When the piston rod 401 moves, the scraping assembly is pushed to rotate to clean the outside of the buffer spring 5, and at the same time, the blowing assembly is driven by the transmission part to blow and clean the buffer spring 5.

[0026] During specific implementation, in actual use, the outside of the buffer spring 5 often brings with it a large amount of dust and dirt, which will affect the shock absorbing effect of the buffer spring 5 during use, and requires manual regular cleaning every time. Therefore, in this solution, each time the piston rod 401 moves inside the hydraulic cylinder 402, the scraping component is driven to scrape and clean the buffer spring 5, and the blowing component is used to blow air into the buffer spring 5, thereby improving the cleaning effect, avoiding manual cleaning, and ensuring the optimal state of the buffer spring 5.

[0027] like Figure 4 , Figure 6 and Figure 7 As shown, in this embodiment, one end of the piston rod 401 away from the hydraulic cylinder 402 is fixedly connected to a fixing column 705 , and a spiral groove is provided on the outer side of the fixing column 705 .

[0028] The scraping assembly includes: A first rotating ring 701, the first rotating ring 701 is rotatably connected to one side of the connecting seat 403; A plurality of connecting plates 703, wherein the plurality of connecting plates 703 are all fixedly connected to the outside of the first rotating ring 701 and are arranged in a ring shape around the center of the first rotating ring 701; The second rotating ring 704 is fixedly connected to one end of the plurality of connecting plates 703, and the inner wall of the second rotating ring 704 is fixedly connected to a plurality of connecting shafts 7041, the second rotating ring 704 is sleeved on the outside of the fixed column 705, and the plurality of connecting shafts 7041 extend to the inside of the spiral groove formed on the outside of the fixed column 705, and are slidably connected to the fixed column 705; A plurality of brush plates 702 are respectively fixedly connected to the inner walls of the plurality of connecting plates 703 and are in contact with the buffer spring 5 for cleaning the buffer spring 5 .

[0029] In specific implementation, when the fixed column 705 at one end of the piston rod 401 approaches the hydraulic cylinder 402, the spiral groove on the fixed column 705 pushes the connecting shaft 7041 inside the second rotating ring 704 on the scraper assembly, thereby causing the second rotating ring 704 to rotate. The rotation of the second rotating ring 704 drives the fixedly connected connecting plate 703 to rotate. When the connecting plate 703 rotates, the buffer spring 5 is rotated and cleaned through the brush plate 702 fixedly connected on the inner side, and the dust and dirt on the outside of the buffer spring 5 are cleaned. The buffer spring 5 is automatically cleaned each time shock absorption and buffering are performed.

[0030] In this embodiment, Figure 4 and Figure 5 As shown, the blowing assembly includes: A lifting plate 802 is arranged on the top of the connecting seat 403, and a foldable airbag 803 is fixedly connected between the lifting plate 802 and the connecting seat 403. A plurality of connecting tubes are fixedly connected to the bottom of the foldable airbag 803. The plurality of connecting tubes extend to the interior of the fixed cylinder 601 and are used to blow air into the buffer spring 5. A one-way air outlet valve is arranged on the outside of the connecting tube, and a one-way air inlet valve is arranged on the outside of the foldable airbag 803.

[0031] Transmission parts include: The inner gear ring 801 is fixedly connected to the first rotating ring 701 through a support rod, and the inner gear ring 801 is arranged on the top of the connecting seat 403; A plurality of reciprocating screw rods 805 are rotatably connected to the top of the connection seat 403, and a connection plate 806 is rotatably connected to the top of the plurality of reciprocating screw rods 805. The plurality of reciprocating screw rods 805 all penetrate the lifting plate 802 and are connected to the lifting plate 802 through a ball nut pair, so as to drive the lifting plate 802 to lift and reciprocate, so as to inflate and exhaust the foldable airbag 803; The plurality of first gears 804 are respectively fixedly connected to the outsides of the plurality of reciprocating screw rods 805 , and the plurality of first gears 804 are meshedly connected with the inner gear ring 801 .

[0032] In specific implementation, when the brush plate 702 cleans the buffer spring 5, there will inevitably be parts that cannot be cleaned. Therefore, in this solution, when the connecting plate 703 rotates, it drives the fixedly connected first rotating ring 701 to rotate, and the first rotating ring 701 drives the fixedly connected inner gear ring 801 to rotate through the support rod. At this time, the inner gear ring 801 drives multiple meshing connected first gears 804, the first gear 804, and the multiple first gears 804 drive the fixedly connected reciprocating screw 805 to rotate, and the reciprocating screw 805 drives the lifting plate 802 to reciprocate and lift, and the lifting plate 802 is lifted and lowered during the lifting process. During the process, the foldable airbag 803 is pulled to expand and contract. When the lifting plate 802 rises, the foldable airbag 803 is expanded by air intake through the one-way air inlet valve. When the lifting plate 802 descends, the gas inside the foldable airbag 803 is discharged into the fixed cylinder 601 through the connecting pipe, and the gas inside the fixed cylinder 601 is discharged through the air injection slot 603, and the discharged gas is used to spray and clean the buffer spring 5. When the brush plate 702 is cleaning, the brush plate 702 is coordinated to spray and further clean the buffer spring 5, thereby ensuring the buffer effect and service life of the buffer spring 5. In addition, a plurality of heat sinks 602 are arranged outside the hydraulic cylinder 402 . When the fixed cylinder 601 is inflated, the heat conducted by the heat sink 602 is taken away, the hydraulic cylinder 402 is cooled, and the gas circulation inside the fixed cylinder 601 is improved.

[0033] Embodiment 3: Figure 8 , Fig. 9 and Fig.10 As shown, the fixed cylinder 601 is rotatably connected to a rotating disk 9 near the top of one end of the piston rod 401, and a plurality of dust cleaning mechanisms are arranged on the top of the rotating disk 9. The plurality of dust cleaning mechanisms are arranged in a ring around the center of the piston rod 401. The dust cleaning mechanisms are used to clean the outer side of the part of the piston rod 401 extending to the hydraulic cylinder 402, and the cleaning mechanisms include a stripping assembly and a receiving assembly.

[0034] In specific implementation, during the shock absorption process, the piston rod 401 will continuously expand and contract inside the hydraulic cylinder 402, and the outside of the piston rod 401 will be covered with mud. During the reciprocating movement, a large amount of dust will enter the hydraulic cylinder 402 through the gap, and the dust will affect the expansion and contraction of the piston rod 401 and the hydraulic cylinder 402. Therefore, in this solution, a dust cleaning mechanism is provided at one end of the fixed cylinder 601 to peel off the dust on the outside of the piston rod 401 to prevent dust from entering the gap between the piston rod 401 and the hydraulic cylinder 402.

[0035] In this embodiment, the receiving component includes: A support frame 903 is fixedly connected to the top of the rotating disk 9, and a first annular scraper 901 is provided on one side of the support frame 903. The first annular scraper 901 is in contact with the outer side of the piston rod 401. A second fixed plate 904 is fixedly connected to the outer side of the support frame 903. A second telescopic rod 905 and a second spring 906 are fixedly connected between the second fixed plate 904 and the first annular scraper 901. The second spring 906 is sleeved on the outer side of the second telescopic rod 905. A second winding rod 909 that penetrates the support frame 903, a third traction rope 911 is wound around the outer side of the second winding rod 909, one end of the third traction rope 911 is fixedly connected to the first annular scraper 901, and when the second winding rod 909 rotates, the third traction rope 911 is wound to pull the first annular scraper 901 to separate from the piston rod 401; Two second gears 908 are respectively fixedly connected to the two ends of the second winding rod 909, and the outer sides of the two second gears 908 are meshedly connected with racks 907. The bottoms of the two racks 907 are connected to the support frame 903 through elastic parts. The elastic parts can be springs and telescopic rods. By fixing the two ends of the spring and the telescopic rod to the racks 907 and the support frame 903 respectively, a push rod 912 is fixedly connected between the two racks 907.

[0036] The stripping assembly includes: A second arc scraper 902 is disposed on the top of the first annular scraper 901, and the second arc scraper 902 is in contact with the outer side of the piston rod 401; A first fixed plate 9021 fixedly connected to one end of the support frame 903, a first telescopic rod 9024 and a first spring 9025 fixedly connected between the first fixed plate 9021 and the second arc-shaped scraper 902, and the first spring 9025 sleeved on the outside of the first telescopic rod 9024; A first winding rod 9022, the first winding rod 9022 passes through the support frame 903 and is rotatably connected to the support frame 903, a first traction rope 9026 is wound around the outer side of the first winding rod 9022, and the first traction rope 9026 passes through the first fixing plate 9021 and is fixedly connected to the second arc scraper 902; A first winding disc 9023 is provided at both ends of the first winding rod 9022, the first winding disc 9023 and the support frame 903 are connected via a torsion spring, and the first winding disc 9023 and the first winding rod 9022 are connected via a one-way bearing; The second winding drum 910 is fixedly connected to one side of the second gear 908 , and a second traction rope 9027 is wound and connected between the second winding drum 910 and the first winding drum 9023 .

[0037] In specific implementation, when the piston rod 401 moves during the shock absorption process, the second arc scraper 902 and the first annular scraper 901 scrape the outer side of the piston rod 401, and the multiple first annular scrapers 901 and the first annular scraper 901 form a complete circle. When the piston rod 401 descends and contacts the push rod 912, the push rod 912 is pushed to descend. It is worth noting that the length of the push rod 912 here is selected according to the descending distance of the hydraulic cylinder 402 to ensure that the push rod 912 can be pushed when one end of the piston rod 401 descends. When the push rod 912 descends, it drives the fixedly connected rack 907 to move, and the rack 907 drives the second gear 908 to rotate through the meshing connection. 08 drives the second winding disc 910 on the outside to rotate. When the second winding disc 910 rotates, the second winding disc 910 drives the second traction rope 9027 to reel up. At this time, the second traction rope 9027 pulls the first winding disc 9023 to rotate. The first winding disc 9023 is connected to the first winding rod 9022 through a one-way damping bearing. The first winding rod 9022 rotates through the damping effect. The rotation of the first winding rod 9022 drives the first traction rope 9026 to reel up. At this time, the first traction rope 9026 pulls the second arc scraper 902 to rise. The second arc scraper 902 rises in contact with the piston rod 401 to peel off the dust on the outside of the piston rod 401 upwards, thereby achieving the effect of cleaning the piston rod 401; The cross section of the top of the second arc-shaped scraper 902 can be set to be inclined, and when the dust is peeled off, the dust slides down along the inclined surface of the top of the second arc-shaped scraper 902; When the second gear 908 rotates, the second winding rod 909 that is fixedly connected is driven to rotate. The second winding rod 909 winds up the third traction rope 911, so that the third traction rope 911 pulls the first annular scraper 901 away from the piston rod 401. The dust on the top of the first annular scraper 901 and the dust peeled off by the second arc scraper 902 fall on the second arc scraper 902 and move away from the piston rod 401. When the piston rod 401 rises, the push rod 912 drives the second gear 908 to reverse, so that the first annular scraper 901 is reset. At this time, the first winding disc 90 23 is connected to the first traction rope 9026 through a one-way bearing, the first winding disk 9023 will not affect the reversal of the first traction rope 9026, the second arc scraper 902 is quickly reset through the first spring 9025 and the first telescopic rod 9024 between the first fixed plate 9021, and the first annular scraper 901 contacts the bottom of the second arc scraper 902 at the reset top, and the dust on the top of the first annular scraper 901 is scraped off to avoid the first annular scraper 901 from bringing back the cleaned dust when resetting, thereby ensuring the effective cleaning of the gap between the piston rod 401 and the hydraulic cylinder 402.

[0038] In this embodiment, a first magnetic ring 900 is fixedly connected to the top of the rotating disk 9, and a second magnetic ring 706 is fixedly connected to the outer side of the connecting plate 703. The second magnetic ring 706 is magnetically attracted to the first magnetic ring 900. When the second magnetic ring 706 rotates, the first magnetic ring 900 is driven to rotate by magnetic attraction.

[0039] During specific implementation, when the connecting plate 703 drives the second magnetic ring 706 to rotate, the second magnetic ring 706 drives the first magnetic ring 900 to rotate together, the first annular scraper 901 and the second arc scraper 902 in the dust cleaning mechanism on the rotating disk 9 rotate around the piston rod 401, and brushes are arranged on the outside of the first annular scraper 901 and the second arc scraper 902, so that the piston rod 401 can be cleaned when rotating.

[0040] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", 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 representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A motorhome chassis crossbeam shock absorbing device, comprising a crossbeam 1 (1), a crossbeam 2 (2), a swing arm (3) and a round table (4), wherein the round table (4) and the swing arm (3) are fixedly connected, and the swing arm (3) and the crossbeam 2 (2) are hingedly connected, characterized in that: Also includes: A shock absorbing mechanism, the shock absorbing mechanism comprising a piston rod (401) and a hydraulic cylinder (402), the piston rod (401) extending into the interior of the hydraulic cylinder (402) and being slidably connected to the hydraulic cylinder (402), one end of the hydraulic cylinder (402) being fixedly connected to a connecting seat (403), one end of the connecting seat (403) being hinged to a round table (4) via a first support plate, one end of the piston rod (401) being hinged to a second support plate cross beam (1), and a buffer spring (5) being provided between the connecting seat (403) and the piston rod (401); A fixed cylinder (601) is sleeved on the outside of the hydraulic cylinder (402), the fixed cylinder (601) is fixedly connected to the connecting seat (403), and a plurality of air injection slots (603) are provided on the outside of the fixed cylinder (601). A cleaning mechanism is provided on the outside of the buffer spring (5) for cleaning the buffer spring (5), the cleaning mechanism comprising a scraping assembly and a blowing assembly, a transmission member is provided between the blowing assembly and the scraping assembly, when the piston rod (401) moves, the scraping assembly is driven to rotate to clean the outside of the buffer spring (5), and at the same time, the blowing assembly is driven by the transmission member to blow and clean the buffer spring (5).

2. A motorhome chassis crossbeam shock absorbing device according to claim 1, characterized in that: One end of the piston rod (401) away from the hydraulic cylinder (402) is fixedly connected to a fixing column (705), and a spiral groove is formed on the outer side of the fixing column (705).

3. A motorhome chassis crossbeam shock absorbing device according to claim 2, characterized in that: The scraping assembly comprises: A first rotating ring (701), the first rotating ring (701) being rotatably connected to one side of the connecting seat (403); A plurality of connecting plates (703), wherein the plurality of connecting plates (703) are all fixedly connected to the outside of the first rotating ring (701) and are arranged in a ring shape around the center of the first rotating ring (701); A second rotating ring (704), the second rotating ring (704) is fixedly connected to one end of the plurality of connecting plates (703), and the inner wall of the second rotating ring (704) is fixedly connected to a plurality of connecting shafts (7041), the second rotating ring (704) is sleeved on the outside of the fixed column (705), and the plurality of connecting shafts (7041) all extend to the inside of the spiral groove formed on the outside of the fixed column (705), and are slidably connected to the fixed column (705); A plurality of brush plates (702) are respectively fixedly connected to the inner walls of the plurality of connecting plates (703) and are in contact with the buffer spring (5) for cleaning the buffer spring (5).

4. The shock absorbing device for a chassis crossbeam of a motorhome according to claim 1, characterized in that: The blowing assembly comprises a lifting plate (802) arranged on the top of the connecting seat (403); a foldable airbag (803) is fixedly connected between the lifting plate (802) and the connecting seat (403); a plurality of connecting tubes are fixedly connected to the bottom of the foldable airbag (803); the plurality of connecting tubes extend into the interior of the fixed cylinder (601) and are used to blow air into the interior of the buffer spring (5); a one-way air outlet valve is arranged on the outside of the connecting tube; and a one-way air inlet valve is arranged on the outside of the foldable airbag (803).

5. The shock absorbing device for a chassis crossbeam of a motorhome according to claim 4, characterized in that: The transmission member comprises: An inner gear ring (801), the inner gear ring (801) is fixedly connected to the first rotating ring (701) via a support rod, and the inner gear ring (801) is arranged on the top of the connecting seat (403); A plurality of reciprocating screw rods (805) rotatably connected to the top of the connection seat (403), the tops of the plurality of reciprocating screw rods (805) being rotatably connected to a connection plate (806), the plurality of reciprocating screw rods (805) all passing through the lifting plate (802) and being connected to the lifting plate (802) via a ball nut pair, and being used to drive the lifting plate (802) to reciprocate and lift, so as to inflate and exhaust the foldable airbag (803); A plurality of first gears (804) are respectively fixedly connected to the outsides of the plurality of reciprocating screw rods (805), and the plurality of first gears (804) are meshingly connected with the inner gear ring (801).

6. The shock absorbing device for a chassis crossbeam of a motorhome according to claim 3, characterized in that: The fixed cylinder (601) is rotatably connected to a rotating disk (9) near the top of one end of the piston rod (401). A plurality of dust cleaning mechanisms are arranged on the top of the rotating disk (9). The plurality of dust cleaning mechanisms are arranged in a ring around the center of the piston rod (401). The dust cleaning mechanisms are used to clean the outer side of the portion of the piston rod (401) extending to the hydraulic cylinder (402). The cleaning mechanisms include a stripping component and a receiving component.

7. A motorhome chassis crossbeam shock absorbing device according to claim 6, characterized in that: The receiving component comprises: A support frame (903) is fixedly connected to the top of the rotating disk (9), a first annular scraper (901) is provided on one side of the support frame (903), the first annular scraper (901) is in contact with the outer side of the piston rod (401), a second fixed plate (904) is fixedly connected to the outer side of the support frame (903), a second telescopic rod (905) and a second spring (906) are fixedly connected between the second fixed plate (904) and the first annular scraper (901), and the second spring (906) is sleeved on the outer side of the second telescopic rod (905); A second winding rod (909) passes through the support frame (903), a third traction rope (911) is wound around the outside of the second winding rod (909), one end of the third traction rope (911) is fixedly connected to the first annular scraper (901), and when the second winding rod (909) rotates, the third traction rope (911) is wound to pull the first annular scraper (901) to separate from the piston rod (401); Two second gears (908), the two second gears (908) are respectively fixedly connected to the two ends of the second winding rod (909), the outer sides of the two second gears (908) are meshedly connected with racks (907), the bottoms of the two racks (907) are connected to the support frame (903) through elastic parts, and a push rod (912) is fixedly connected between the two racks (907).

8. The shock absorbing device for a chassis crossbeam of a motorhome according to claim 7, characterized in that: The stripping assembly comprises: A second arc-shaped scraper (902) is arranged on the top of the first annular scraper (901), and the second arc-shaped scraper (902) is in contact with the outer side of the piston rod (401); A first fixed plate (9021) is fixedly connected to one end of the support frame (903); a first telescopic rod (9024) and a first spring (9025) are fixedly connected between the first fixed plate (9021) and the second arc-shaped scraper plate (902); and the first spring (9025) is sleeved on the outside of the first telescopic rod (9024); A first winding rod (9022), the first winding rod (9022) passes through the support frame (903) and is rotatably connected to the support frame (903), a first traction rope (9026) is wound around the outside of the first winding rod (9022), the first traction rope (9026) passes through the first fixing plate (9021) and is fixedly connected to the second arc-shaped scraper (902); A first winding disc (9023) is arranged at both ends of the first winding rod (9022), the first winding disc (9023) and the support frame (903) are connected via a torsion spring, and the first winding disc (9023) and the first winding rod (9022) are connected via a one-way bearing; A second winding disc (910) is fixedly connected to one side of the second gear (908), and a second traction rope (9027) is wound and connected between the second winding disc (910) and the first winding disc (9023).

9. A motorhome chassis crossbeam shock absorbing device according to claim 8, characterized in that: A first magnetic ring (900) is fixedly connected to the top of the rotating disk (9), and a second magnetic ring (706) is fixedly connected to the outer side of the connecting plate (703). The second magnetic ring (706) is magnetically attracted to the first magnetic ring (900), and when the second magnetic ring (706) rotates, the first magnetic ring (900) is driven to rotate by magnetic attraction.

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