Nonlinearly damped hinged steering structure

Abstract

The application discloses a nonlinear damping hinged steering structure, comprising a hinged steering system and a nonlinear damping structure; the hinged steering system comprises a front hinged seat and a rear hinged seat; the front hinged seat and the rear hinged seat are hingedly connected with each other; the nonlinear damping structure comprises a steel plate spring, a coil spring, Y-shaped connecting rods arranged at two ends of the coil spring respectively and a pneumatic spring; one end of the Y-shaped connecting rod is hingedly connected with an end of the coil spring, the other end of the Y-shaped connecting rod is hingedly connected with one end of the pneumatic spring, and the other end of the pneumatic spring is hingedly connected with the steel plate spring. The hinged steering structure can adapt to complex paddy field environment working conditions with unevenness, adopts nonlinear damping, can weaken the impact of a bumpy road section on the hinged steering system, and improves the smoothness of the hinged steering; meanwhile, the hinged steering structure can resist the torsion caused by high-speed turning working conditions or uneven road turning, and improves the stability of the hinged steering.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paddy field chassis steering, in particular to a nonlinear damping hinged steering structure. BACKGROUND

[0002] At present, the steering mode of the paddy field chassis is mainly Ackerman steering, and part of the paddy field chassis also adopts hinged steering mode. The hinged steering mode has small turning radius, strong maneuverability, and the same track as a vehicle rut, so the hinged steering mode is applied to the paddy field chassis for field management, especially for the agricultural vehicle for field patrol.

[0003] Due to the complex environment of the paddy field, the hinged steering structure of the paddy field chassis is adversely affected. The paddy field chassis runs in the paddy field environment, which will bring impact to the hinged steering structure; the paddy field chassis turns on the uneven paddy field, which will cause the hinged steering structure to twist; and the hinged steering structure will even be broken under severe working conditions. SUMMARY

[0004] The purpose of the present application is to overcome the above-mentioned problems, and to provide a nonlinear damping hinged steering structure. The hinged steering structure can adapt to the complex working conditions of the uneven paddy field environment, adopt nonlinear damping, weaken the impact of the bumpy road section on the hinged steering system, and improve the smoothness of the hinged steering; at the same time, it can resist the torsion caused by high-speed turning or uneven road turning, and improve the stability of the hinged steering.

[0005] The purpose of the present application is achieved by the following technical scheme:

[0006] A nonlinear damping hinged steering structure is arranged between the front half frame and the rear half frame; the nonlinear damping hinged steering structure comprises a hinged steering system and a nonlinear damping structure arranged on the hinged steering system; wherein,

[0007] The hinged steering system comprises a front hinged seat and a rear hinged seat; the front hinged seat and the rear hinged seat are hingedly connected to each other; the front hinged seat is connected to the front half frame, and the rear hinged seat is connected to the rear half frame;

[0008] The nonlinear damping structure is a three-stage damping structure, which is used to weaken the impact of the bumpy road section on the hinged steering system and to resist the torsion caused by high-speed turning or uneven road turning; the nonlinear damping structure comprises a steel plate spring, a spiral spring, a Y-shaped connecting rod arranged at both ends of the spiral spring, and a pneumatic spring arranged between each Y-shaped connecting rod and the steel plate spring; the spiral spring is arranged horizontally, one end of the Y-shaped connecting rod is hingedly connected to the end of the spiral spring, the other end of the Y-shaped connecting rod is hingedly connected to one end of the pneumatic spring, and the other end of the pneumatic spring is hingedly connected to the steel plate spring.

[0009] The working principle of the above-mentioned nonlinear damping hinged steering structure is:

[0010] The steel plate spring constitutes a first-stage damping structure, the coil spring constitutes a second-stage damping structure, and the coil spring constitutes a third-stage damping structure; in operation, the paddy field chassis is driven from the ground into the paddy field, and due to the low terrain of the paddy field, a drop will occur, which will bring impact to the hinged steering system connected between the front half frame and the rear half frame; at the same time, the paddy field chassis is driven in the paddy field, and due to the uneven environment of the paddy field, the paddy field chassis will be jolted and vibrated; the impact and vibration will first be transmitted to the first-stage damping structure, at this time the steel plate spring will be deformed to absorb the first wave of large impact, and then transmitted to the second-stage damping structure, at this time the pneumatic spring will be buffered, and at the same time, the impact will be transmitted to the third-stage damping structure through the reaction of the spatial Y-shaped connecting rod, at this time the coil spring will be deformed to absorb the energy of the remaining impact, and weaken the stress concentration of the hinged steering system subjected to the impact.

[0011] Due to the uneven environment of the paddy field, the paddy field chassis will be inclined to a certain extent, and when the paddy field chassis turns or makes a U-turn in the paddy field, the hinged steering system will be subjected to impact and a certain torsion, the impact and vibration will first be transmitted to the first-stage damping structure, at this time the steel plate spring will be deformed to absorb the first wave of large impact, and then transmitted to the second-stage damping structure, at this time the pneumatic spring will be buffered, and at the same time, the impact will be transmitted to the third-stage damping structure through the reaction of the spatial Y-shaped connecting rod, at this time the coil spring will be deformed, and since the coil spring is horizontally arranged, it will not only weaken the stress concentration of the hinged steering system subjected to the impact, but also resist the torsion of the hinged steering system.

[0012] In one preferred embodiment of the present application, the front hinged seat comprises a rotary support column, a vertical fixed support, an intermediate connecting plate fixedly arranged between the rotary support column and the vertical fixed support, and a trapezoidal connecting clamp arranged on both sides of the rotary support column; the intermediate connecting plate is two, and the two intermediate connecting plates are distributed in an up-down manner; the vertical fixed support is connected with the front half frame; the rear hinged seat comprises rotary bearing fixed supports symmetrically arranged at the upper and lower ends of the front hinged seat; each rotary bearing fixed support is connected with the rotary support column through a rotary bearing, and the two rotary bearing fixed supports are connected with the rear half frame. In the above structure, the relative rotation between the front hinged seat and the rear hinged seat can be realized by arranging the rotary bearing, and the specific structural arrangement of the above-mentioned front hinged seat and rear hinged seat can make the steering system more compact and the structure more stable.

[0013] Preferably, the number of the nonlinear damping structures is two groups, and the two groups of nonlinear damping structures are symmetrically arranged up and down. By arranging two groups of nonlinear damping structures, the effect of superposition is achieved, and the damping and energy absorption effect is further improved, which protects the articulated steering system well and improves the stability of the articulated steering.

[0014] Preferably, a shock absorber is arranged between the two rotary bearing fixed supports, one end of the shock absorber is connected with one rotary bearing fixed support, and the other end of the shock absorber is connected with the other rotary bearing fixed support. By arranging the shock absorber, the vibration of the rotary bearing fixed support can be absorbed, and the stability of the articulated steering is ensured.

[0015] Preferably, the shock absorber comprises an upper base, a lower base, a shock absorber body arranged between the upper base and the lower base, a main spring, a secondary spring, an intermediate spring cover and a lower spring cover; the upper base is arranged on the rotary bearing fixed support at the upper end, and the lower base is arranged on the rotary bearing fixed support at the lower end; the upper end of the shock absorber body acts on the upper base, and the lower end acts on the lower base; the upper end of the main spring acts on the upper base, and the lower end acts on the intermediate spring cover; the upper end of the secondary spring acts on the intermediate spring cover, and the lower end acts on the lower spring cover. In the above structure, the main spring and the secondary spring are used, which has high elastic recovery force, so that it has higher elastic recovery force and deformation under the same load capacity, can effectively absorb the influence of road damping and water field chassis weight; when the damping of the main spring is not enough, the secondary spring will share the damping pressure of the main spring, the main spring and the secondary spring are stacked, the damping effect is expanded, and the stability of the articulated steering system is improved.

[0016] Preferably, the nonlinear damping structure is arranged between the vertical fixed support and the intermediate connecting plate, the two ends of the steel plate spring are arranged on the side surface of the vertical fixed support, the Y-shaped connecting rod comprises a first branch rod, a second branch rod and a third branch rod; the first branch rod is hinged with the end of the pneumatic spring; the second branch rod is hinged with the end of the spiral spring; and the third branch rod is hinged with the intermediate connecting plate. In the above structure, the Y-shaped connecting rod is a space three-dimensional connecting rod, the first branch rod, the second branch rod and the third branch rod are arranged at an angle in space; the movement in the horizontal direction is transmitted to the vertical plane, that is, the steel plate spring is transmitted to the spiral spring through the space Y-shaped connecting rod. When the water field chassis shakes and vibrates, the nonlinear damping structure arranged between the vertical fixed support and the intermediate connecting plate can absorb the vibration, weaken the stress concentration of the articulated steering system under impact, and resist the torsion of the articulated steering system. At the same time, such arrangement also makes the nonlinear damping articulated steering structure very compact, and the nonlinear damping articulated steering structure adopts an up-down symmetric layout, and has good energy absorption effect.

[0017] Preferably, the nonlinear damping structure is arranged between the vertical fixed support and the rotary bearing fixed support; the two ends of the steel plate spring are mounted on the side of the vertical fixed support; the Y-shaped connecting rod comprises a first branch, a second branch and a third branch; the first branch is hinged to the end of the pneumatic spring; the second branch is hinged to the end of the coil spring; a sliding assembly is arranged between the Y-shaped connecting rod and the rotary bearing fixed support, the sliding assembly comprises a first guide rail fixed on the rotary bearing fixed support and a second guide rail slidingly arranged on the first guide rail, and the third branch is hinged to the second guide rail. In the above structure, the Y-shaped connecting rod is a space three-dimensional connecting rod, and the first branch, the second branch and the third branch are arranged at angles in space; the motion in the horizontal direction is transmitted to the vertical plane, that is, the steel plate spring is transmitted to the coil spring through the space Y-shaped connecting rod. By arranging the sliding assembly, the smooth turning of the hinged turning system can be ensured, and at the same time, the elastic force of the nonlinear damping structure can act on the front hinged seat and the rear hinged seat; when the paddy field chassis is jolted and vibrated, the nonlinear damping structure can absorb the vibration of the front hinged seat and the rear hinged seat, weaken the stress concentration of the hinged turning system caused by the impact, resist the torsion of the hinged turning system, the anti-torsion effect is stronger, and the stability of the hinged turning is further improved.

[0018] Preferably, the first guide rail is in the shape of a circular arc, and the guide path of the first guide rail passes through the rotation center of the rotary bearing fixed support. When the hinged turning system turns, the position of the second guide rail on the first guide rail can be adaptively adjusted, and the nonlinear damping structure can be deflected in the turning direction, so that the vibration of the rear hinged seat can be more easily and quickly transmitted to the nonlinear damping structure.

[0019] Preferably, the first guide rail is in the shape of a circular arc or a circular ring, and the center of the guide path of the first guide rail coincides with the rotation center of the rotary bearing fixed support. When the hinged turning system turns, the first guide rail rotates with the rotary bearing fixed support; since the center of the guide path of the first guide rail coincides with the rotation center of the rotary bearing fixed support, the position of the second guide rail can remain unchanged, so that the nonlinear damping structure will not be deformed, and a good anti-impact effect can be achieved in jolting and vibration.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] 1. The nonlinear damping hinged turning structure in the present application can weaken the impact of the jolting section on the turning system and improve the smoothness of the hinged turning by arranging the nonlinear damping structure.

[0022] 2. The nonlinear damping articulated steering structure in the application, by setting the nonlinear damping structure, the torsion caused by high-speed turning or uneven road turning can be resisted, and the stability of the articulated steering is improved.

[0023] 3. The nonlinear damping articulated steering structure in the application, the nonlinear damping structure is a three-stage damping structure, the impact of the water field chassis driving process on the articulated steering system is absorbed by the first-stage steel plate spring, and the second-stage pneumatic spring is used for buffering and damping, and finally transmitted to the third-stage spiral spring; through stage-by-stage transmission, the damping performance of the articulated steering system is increased.

[0024] 4. The nonlinear damping articulated steering structure in the application, by setting the Y-shaped connecting rod, the horizontal vibration of the first-stage steel plate spring is transmitted to the vertical plane of the third-stage spiral spring, so that the damping structure contains damping effects in horizontal and vertical directions, and the breadth of the nonlinear damping structure is increased. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a front view of the first specific embodiment of the nonlinear damping articulated steering structure in the application.

[0026] Figure 2 It is a top view of the nonlinear damping articulated steering structure in the application.

[0027] Figure 3 It is an explosion view in the main view direction of the nonlinear damping articulated steering structure in the application.

[0028] Figure 4 It is an explosion view in the perspective direction of the nonlinear damping articulated steering structure in the application.

[0029] Figure 5 It is a perspective structural schematic view of the front articulated seat and the nonlinear damping structure in the application.

[0030] Figure 6 It is a perspective structural schematic view of the Y-shaped connecting rod in the application.

[0031] Figure 7 It is a top view of the second specific embodiment of the nonlinear damping articulated steering structure in the application.

[0032] Figure 8 It is a perspective structural schematic view of the second specific embodiment of the nonlinear damping articulated steering structure in the application.

[0033] Figure 9 It is a top view of the third specific embodiment of the nonlinear damping articulated steering structure in the application.

[0034] Figure 10 is a front view of a third specific embodiment of a non-linear damping articulated steering structure in the application.

[0035] Figure 11 is a structural schematic diagram of a damper in the application. DETAILED DESCRIPTION

[0036] In order for those skilled in the art to have a better understanding of the technical solutions of the application, the application will be further described below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the application are not limited thereto.

[0037] Embodiment 1

[0038] Referring to Figure 1 , a non-linear damping articulated steering structure in the embodiment is arranged between a front half frame 1 and a rear half frame 2; the non-linear damping articulated steering structure comprises an articulated steering system 4 and a non-linear damping structure 5 arranged on the articulated steering system 4.

[0039] Referring to Figures 1-2 , the articulated steering system 4 comprises a front articulated seat 4-1 and a rear articulated seat 4-2; the front articulated seat 4-1 and the rear articulated seat 4-2 are connected to each other in an articulated manner; the front articulated seat 4-1 is connected to the front half frame 1, and the rear articulated seat 4-2 is connected to the rear half frame 2.

[0040] Referring to Figures 1-6 , the non-linear damping structure 5 is a three-stage damping structure, which is used to weaken the impact of a bump road section on the articulated steering system 4 and to resist the torsion caused by high-speed turning or uneven road turning; the non-linear damping structure 5 comprises a steel plate spring 5-1, a coil spring 5-2, Y-shaped connecting rods 5-3 arranged at two ends of the coil spring 5-2 respectively, and pneumatic springs 5-4 arranged between each Y-shaped connecting rod 5-3 and the steel plate spring 5-1; the coil spring 5-2 is arranged horizontally, one end of the Y-shaped connecting rod 5-3 is articulated to an end of the coil spring 5-2, the other end of the Y-shaped connecting rod 5-3 is articulated to one end of the pneumatic spring 5-4, and the other end of the pneumatic spring 5-4 is articulated to the steel plate spring 5-1. The steel plate spring 5-1 acts on the front articulated seat 4-1, and the Y-shaped connecting rod 5-3 can be connected to the front articulated seat 4-1 or the rear articulated seat 4-2; in the embodiment, the Y-shaped connecting rod 5-3 is connected to the front articulated seat 4-1; in the above structure, the Y-shaped connecting rod 5-3 and the pneumatic spring 5-4 of the non-linear damping structure 5 are both two.

[0041] Referring to Figures 1-5The front hinged seat 4-1 comprises a rotary support column 4-11, a vertical fixed support 4-12, an intermediate connecting plate 4-13 fixedly arranged between the rotary support column 4-11 and the vertical fixed support 4-12, and a trapezoidal connecting clamp 4-14 arranged on both sides of the rotary support column 4-11; the intermediate connecting plate 4-13 is two, and the two intermediate connecting plates 4-13 are distributed in an up-down manner; the vertical fixed support 4-12 is connected with the front half frame 1; the rear hinged seat 4-2 comprises rotary bearing fixed supports 4-21 arranged symmetrically at the upper and lower ends of the front hinged seat 4-1 respectively; each rotary bearing fixed support 4-21 is connected with the rotary support column 4-11 through a rotary bearing 4-3, and the two rotary bearing fixed supports 4-21 are connected with the rear half frame 2. In the above structure, the front end of the rotary bearing 4-3 at the upper end is fixedly connected with the upper end of the rotary support column 4-11, and the tail end of the rotary bearing 4-3 at the upper end is fixedly connected with the rotary bearing fixed support 4-21 at the upper end; the front end of the rotary bearing 4-3 at the lower end is fixedly connected with the lower end of the rotary support column 4-11, and the tail end of the rotary bearing 4-3 at the lower end is fixedly connected with the rotary bearing fixed support 4-21 at the lower end; by arranging the rotary bearing 4-3, the front hinged seat 4-1 and the rear hinged seat 4-2 can be relatively rotated, and the specific structure of the front hinged seat 4-1 and the rear hinged seat 4-2 can make the steering system more compact and the structure more stable.

[0042] Referring to Figures 1-3 The trapezoidal connecting clamp 4-14 can improve the stability of the overall structure of the front hinged seat 4-1, and can also be used for mounting other accessories of the paddy field chassis.

[0043] Referring to Figures 1-5 The two groups of nonlinear damping structures 5 are arranged in an up-down symmetrical manner. By arranging the two groups of nonlinear damping structures 5, the effect of superposition is achieved, the damping and energy absorption effect is further improved, the hinged steering system 4 is well protected, and the stability of the hinged steering is improved.

[0044] Referring to Figures 1-5 The two ends of the steel plate spring 5-1 are connected with the vertical fixed support 4-12 through the lifting lug 5-5; the steel plate spring 5-1 is arranged in a vertical and horizontal manner, and the steel plate spring 5-1 protrudes towards the rear hinged seat 4-2. The purpose is to transmit the horizontal vibration of the first-stage steel plate spring 5-1 to the vertical plane of the third-stage coil spring 5-2, so that the damping structure contains the damping effect in the horizontal and vertical directions, and the width of the nonlinear damping structure 5 is increased.

[0045] Referring to Figures 1-5The first fixing lug 5-6 is fixedly connected to one end of the steel plate spring 5-1 and hingedly connected to the other end of the pneumatic spring 5-4 through a pin.

[0046] Referring to Figures 1-4 The shock absorber 6 is arranged between the two rotary bearing fixing supports 4-21, and one end of the shock absorber 6 is connected to one rotary bearing fixing support 4-21, and the other end of the shock absorber 6 is connected to the other rotary bearing fixing support 4-21. By arranging the shock absorber 6, the vibration of the rotary bearing fixing support 4-21 can be absorbed, and the stability of the hinged steering is ensured.

[0047] Referring to Figures 1-4 and Figure 11 The shock absorber 6 comprises an upper base 6-1, a lower base 6-2, a shock absorber body 6-3 arranged between the upper base 6-1 and the lower base 6-2, a main spring 6-4 sleeved on the shock absorber body 6-3, a secondary spring 6-5, an intermediate spring cover 6-6, and a lower spring cover 6-7. The upper base 6-1 is arranged on the rotary bearing fixing support 4-21 at the upper end, and the lower base 6-2 is arranged on the rotary bearing fixing support 4-21 at the lower end. The upper end of the shock absorber body 6-3 acts on the upper base 6-1, and the lower end of the shock absorber body 6-3 acts on the lower base 6-2. The upper end of the main spring 6-4 acts on the upper base 6-1, and the lower end of the main spring 6-4 acts on the intermediate spring cover 6-6. The upper end of the secondary spring 6-5 acts on the intermediate spring cover 6-6, and the lower end of the secondary spring 6-5 acts on the lower spring cover 6-7. In the above structure, the main spring and the secondary spring 6-5 are used, which has high elastic recovery force, so that it has higher elastic recovery force and deformation under the same load capacity, can effectively absorb the influence of road surface damping and the weight of the paddy field chassis; when the damping of the main spring 6-4 is not enough, the secondary spring 6-5 will share the damping pressure of the main spring 6-4, the main spring and the secondary spring 6-5 are superposed, the damping effect is expanded, and the stability of the hinged steering system is improved.

[0048] The lower base 6-2 is connected to the shock absorber body 6-3 through a fish eye bearing 6-8.

[0049] When working, the paddy field chassis drives into the paddy field from the ground, at this time, due to the low terrain of the paddy field, there will be a difference, which will bring impact to the hinged steering system 4 connected with the rear half frame; at the same time, the paddy field chassis drives in the paddy field, due to the uneven environment of the paddy field, the paddy field chassis will be jolted and vibrated. Therefore, the impact and vibration will first be transmitted to the rotary bearing fixed support 4-21 at the upper end and the rotary bearing 4-3, at this time, the main spring 6-4 connected with the rotary bearing fixed support 4-21, the shock absorber main body 6-3, absorbs the first wave of large impact, at the same time, it is transmitted to the auxiliary spring 6-5, at this time, the auxiliary spring 6-5 will buffer, absorb the remaining impact energy, weaken the influence of vibration on the rotary bearing 4-3 in the hinged steering system 4, so that the hinged steering is smooth and stable.

[0050] Due to the uneven environment of the paddy field, the paddy field chassis will be inclined, when the paddy field chassis turns or turns around in the paddy field, the hinged steering system connected with the rear half frame will bear impact and certain torsion, at this time, the impact and vibration will first be transmitted to the main spring 6-4, the shock absorber main body 6-3, at this time, the main spring 6-4 connected with the rotary bearing fixed support 4-21 at the upper end, the shock absorber main body 6-3 will be deformed, absorbing the first wave of large impact, then transmitted to the auxiliary spring 6-5, at this time, the auxiliary spring 6-5 will buffer, at the same time, the fish eye bearing 6-8 connected with the lower base 6-2 will rotate a certain amount of reserve, to offset part of the influence brought by the torsion. Therefore, while weakening the stress concentration of the hinged steering system 4 bearing impact, it also resists the torsion of the hinged steering system 4.

[0051] Referring to Figures 1-4 , the number of shock absorbers 6 is two, by setting two shock absorbers 6, further improving the damping effect.

[0052] Referring to Figures 1-6The non-linear damping structure 5 is arranged between the vertical fixed support 4-12 and the intermediate connecting plate 4-13, and two groups of non-linear damping structures 5 act on the two intermediate connecting plates 4-13 respectively; the two ends of the steel plate spring 5-1 are arranged on the side surface of the vertical fixed support 4-12, the Y-shaped connecting rod 5-3 comprises a first branch rod 5-1, a second branch rod 5-2 and a third branch rod 5-3; the first branch rod 5-1 is hingedly connected with the end of the pneumatic spring 5-4 through a pin; the second branch rod 5-2 is hingedly connected with the end of the spiral spring 5-2; the third branch rod 5-3 is hingedly connected with the intermediate connecting plate 4-13; a second fixed lug 5-7 is arranged between the third branch rod 5-3 and the intermediate connecting plate 4-13, the second fixed lug 5-7 is fixed on the intermediate connecting plate 4-13, and the third branch rod 5-3 is hingedly connected with the second fixed lug 5-7 through a pin. In the above structure, the Y-shaped connecting rod 5-3 is a space three-dimensional connecting rod, the first branch rod 5-1, the second branch rod 5-2 and the third branch rod 5-3 are arranged at angles in space; the motion in the horizontal direction is transmitted to the vertical plane, that is, the steel plate spring 5-1 is transmitted to the spiral spring 5-2 through the space Y-shaped connecting rod 5-3. When the paddy field chassis is jolted and vibrated, the non-linear damping structure 5 arranged between the vertical fixed support 4-12 and the intermediate connecting plate 4-13 can absorb the vibration, weaken the stress concentration of the hinged steering system 4 caused by the impact, and resist the torsion of the hinged steering system 4. At the same time, such arrangement also makes the non-linear damping hinged steering structure very compact, the overall non-linear damping hinged steering structure adopts an upper-lower symmetrical layout, and the energy absorption effect is good.

[0053] Referring to Figures 1-5 The working principle of the above-mentioned non-linear damping hinged steering structure is as follows:

[0054] The steel plate spring 5-1 constitutes a first-stage damping structure, the spiral spring 5-2 constitutes a second-stage damping structure, and the spiral spring 5-2 constitutes a third-stage damping structure; when working, the paddy field chassis is driven from the ground into the paddy field, and since the paddy field is low-lying, there will be a difference, which will bring impact to the hinged steering system 4 connected between the front half frame 1 and the rear half frame 2; at the same time, the paddy field chassis is driven in the paddy field, and since the paddy field is a concave-convex environment, the paddy field chassis will be jolted and vibrated; the impact and vibration will first be transmitted to the first-stage damping structure, at this time, the steel plate spring 5-1 will be deformed to absorb the first wave of large impact, and then transmitted to the second-stage damping structure, at this time, the pneumatic spring 5-4 will be buffered, and at the same time, the impact will be transmitted to the third-stage damping structure through the space Y-shaped connecting rod 5-3, at this time, the spiral spring 5-2 will be deformed to absorb the energy of the remaining impact, and weaken the stress concentration of the hinged steering system 4 caused by the impact.

[0055] Due to the uneven environment of the paddy field, the paddy field chassis will be inclined, when the paddy field chassis turns or turns around in the paddy field, the articulated steering system 4 will bear impact and a certain torsion, the impact and vibration will first be transmitted to the first stage damping structure, at this time the steel plate spring 5-1 will be deformed, absorbing the first wave of large impact, then transmitted to the second stage damping structure, at this time the pneumatic spring 5-4 will buffer, at the same time acting on the space Y-shaped connecting rod 5-3, transmitting the impact to the third stage damping structure, at this time the spiral spring 5-2 will be deformed, since the spiral spring 5-2 is horizontally arranged, it can not only weaken the stress concentration of the articulated steering system 4 bearing impact, but also resist the torsion of the articulated steering system 4.

[0056] The paddy field chassis comprises a nonlinear damping articulated steering structure, a front half frame 1 and a rear half frame 2.

[0057] Embodiment 2

[0058] Referring to Figures 6-8 , other structures in the embodiment are the same as those in embodiment 1, except that the nonlinear damping structure 5 is arranged between the vertical fixed support 4-12 and the slewing bearing fixed support 4-21; the two ends of the steel plate spring 5-1 are mounted on the side surface of the vertical fixed support 4-12; the Y-shaped connecting rod 5-3 comprises a first branch rod 5-1, a second branch rod 5-2 and a third branch rod 5-3; the first branch rod 5-1 is hingedly connected with the end of the pneumatic spring 5-4; the second branch rod 5-2 is hingedly connected with the end of the spiral spring 5-2; a sliding assembly is arranged between the Y-shaped connecting rod 5-3 and the slewing bearing fixed support 4-21, the sliding assembly comprises a first guide rail 7 fixed on the slewing bearing fixed support 4-21 and a second guide rail 8 slidingly arranged on the first guide rail 7, and the third branch rod 5-3 is hingedly connected with the second guide rail 8, specifically, the third branch rod 5-3 is hingedly connected with the second guide rail 8 through the second fixed lug 5-7. In the above structure, the Y-shaped connecting rod 5-3 is a space three-dimensional connecting rod, the first branch rod 5-1, the second branch rod 5-2 and the third branch rod 5-3 are arranged at angles in space; the movement in the horizontal direction is transmitted to the vertical plane, that is, the steel plate spring 5-1 is transmitted to the spiral spring 5-2 through the space Y-shaped connecting rod 5-3. By arranging the sliding assembly, the smooth steering of the articulated steering system 4 can be ensured, and at the same time, the elastic force of the nonlinear damping structure 5 can act on the front articulated seat 4-1 and the rear articulated seat 4-2, when the paddy field chassis is jolted and vibrated, the nonlinear damping structure 5 can absorb the vibration of the front articulated seat 4-1 and the rear articulated seat 4-2, weaken the stress concentration of the articulated steering system 4 bearing impact, resist the torsion of the articulated steering system 4, the anti-torsion effect is stronger, and the stability of the articulated steering is further improved.

[0059] Referring toFigures 6-8 The first guide rail 7 is circular arc-shaped, and the guide path of the first guide rail 7 passes through the rotation center of the rotary bearing fixing support 4-21. The first guide rail 7 is circular arc-shaped, that is, the guide path of the first guide rail 7 is also circular arc-shaped; when the articulated steering system 4 is steering, the position of the second guide rail 8 on the first guide rail 7 can be adaptively adjusted, and the nonlinear damping structure 5 can be deflected in the steering direction, so that the vibration of the rear articulated seat 4-2 is more easily and quickly transmitted to the nonlinear damping structure 5.

[0060] Referring to Figures 6-8 The first guide rail 7 is provided with a groove, and the second guide rail 8 is provided with a protrusion, the groove and the protrusion are slidably matched with each other, and the groove and the protrusion play a guiding role. The sliding assembly can also adopt the structure that the guide rail and the guide groove are matched with each other, the guide groove is directly arranged on the rotary bearing fixing support 4-21, the guide rail and the guide groove are slidably matched, and the third supporting rod 5-3 is articulated on the guide rail. In this way, the structure is more compact.

[0061] Embodiment 3

[0062] Referring to Figure 6 and Figures 9-10 The other structures in the embodiment are the same as those in Embodiment 2, and the difference lies in that the first guide rail 7 is circular arc-shaped or circular ring-shaped, and the center of the guide path of the first guide rail 7 coincides with the rotation center of the rotary bearing fixing support 4-21; the second guide rail 8 in the embodiment is also circular arc-shaped. The first guide rail 7 is circular arc-shaped or circular ring-shaped, that is, the guide path of the first guide rail 7 is also circular arc-shaped or circular; when the articulated steering system 4 is steering, the first guide rail 7 rotates with the rotary bearing fixing support 4-21, and since the center of the guide path of the first guide rail 7 coincides with the rotation center of the rotary bearing fixing support 4-21, the position of the second guide rail 8 can remain unchanged, so that the nonlinear damping structure 5 will not be deformed, and can play a good impact resistance effect in bumping and vibration.

[0063] The above is the preferred embodiment of the present application, but the embodiments of the present application are not limited by the above, and any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the present application should be an equivalent replacement mode, and all are included in the protection scope of the present application.

Claims

1. A nonlinear vibration damping articulated steering structure, characterized in that: The nonlinear vibration damping articulated steering structure is arranged between the front half frame and the rear half frame; the nonlinear vibration damping articulated steering structure includes an articulated steering system and a nonlinear vibration damping structure arranged on the articulated steering system; wherein, The articulated steering system includes a front articulated seat and a rear articulated seat; the front articulated seat and the rear articulated seat are articulatedly connected to each other; the front articulated seat is connected to the front half frame, and the rear articulated seat is connected to the rear half frame; The nonlinear vibration damping structure is a three-stage vibration damping structure, which is used to reduce the impact of bumpy road sections on the articulated steering system and to resist the torsion caused by high-speed cornering conditions or steering on uneven roads; the nonlinear vibration damping structure includes a leaf spring, a coil spring, a Y-shaped connecting rod respectively arranged at both ends of the coil spring, and a pneumatic spring arranged between each Y-shaped connecting rod and the leaf spring; the coil spring is arranged horizontally, one end of the Y-shaped connecting rod is hinged to the end of the coil spring, the other end of the Y-shaped connecting rod is hinged to one end of the pneumatic spring, and the other end of the pneumatic spring is hinged to the leaf spring.

2. The nonlinear vibration damping articulated steering structure according to claim 1, characterized in that: The front articulated seat includes a slewing support column, a vertical fixed support, an intermediate connecting plate fixedly arranged between the slewing support column and the vertical fixed support, and a trapezoidal connecting clamp arranged on both sides of the slewing support column; there are two intermediate connecting plates, which are distributed up and down, and the vertical fixed support is connected to the front half frame; the rear articulated seat includes slewing bearing fixed supports respectively arranged at the upper and lower ends of the front articulated seat and symmetrically arranged; each of the slewing bearing fixed supports is connected to the slewing support column through a slewing bearing, and two of the slewing bearing fixed supports are connected to the rear half frame.

3. The nonlinear vibration damping articulated steering structure according to claim 2, characterized in that: There are two groups of nonlinear vibration damping structures, and the two groups of nonlinear vibration damping structures are symmetrically arranged in an upper and lower manner.

4. The nonlinear vibration damping articulated steering structure according to claim 2, characterized in that: A shock absorber is provided between the two slewing bearing fixed supports, one end of the shock absorber is connected to one of the slewing bearing fixed supports, and the other end of the shock absorber is connected to the other slewing bearing fixed support.

5. The nonlinear vibration damping articulated steering structure according to claim 4, characterized in that: The shock absorber includes an upper base, a lower base, a shock absorber body arranged between the upper base and the lower base, a main spring, a secondary spring, an intermediate spring cover and a lower spring cover mounted on the shock absorber body; the upper base is arranged on a slewing bearing fixed support located at the upper end, and the lower base is arranged on a slewing bearing fixed support located at the lower end; the upper end of the shock absorber body acts on the upper base, and the lower end acts on the lower base; the upper end of the main spring acts on the upper base, and the lower end acts on the intermediate spring cover; the upper end of the secondary spring acts on the intermediate spring cover, and the lower end acts on the lower spring cover.

6. The nonlinear vibration-damping articulated steering structure according to claim 2, characterized in that: The nonlinear vibration damping structure is arranged between the vertical fixed support and the intermediate connecting plate, the two ends of the leaf spring are installed on the side of the vertical fixed support, and the Y-shaped connecting rod includes a first support rod, a second support rod and a third support rod; the first support rod is hinged to the end of the pneumatic spring; the second support rod is hinged to the end of the coil spring; the third support rod is hinged to the intermediate connecting plate.

7. The nonlinear vibration-damping articulated steering structure according to claim 2, characterized in that: The nonlinear vibration damping structure is arranged between the vertical fixed support and the slewing bearing fixed support; the two ends of the leaf spring are installed on the side of the vertical fixed support, and the Y-shaped connecting rod includes a first support rod, a second support rod and a third support rod; the first support rod is hinged to the end of the pneumatic spring; the second support rod is hinged to the end of the coil spring; a sliding assembly is provided between the Y-shaped connecting rod and the slewing bearing fixed support, and the sliding assembly includes a first guide rail fixed on the slewing bearing fixed support and a second guide rail slidably arranged on the first guide rail, and the third support rod is hinged to the second guide rail.

8. The nonlinear vibration-damping articulated steering structure according to claim 7, characterized in that: The first guide rail is in an arc shape, and a guide path of the first guide rail passes through the rotation center of the slewing bearing fixed support.

9. The nonlinear vibration-damping articulated steering structure according to claim 7, characterized in that: The first guide rail is in an arc shape or an annular shape, and the center of the guide path of the first guide rail coincides with the rotation center of the slewing bearing fixed support.

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