阅读说明：本技术 一种车身姿态可调的双叉臂悬架结构 (Double-fork arm suspension structure with adjustable vehicle body posture ) 是由 吴宗乐 柯江林 叶乐舟 欧阳海 张健 于 2020-04-26 设计创作，主要内容包括：本发明公开了一种车身姿态可调的双叉臂悬架结构,包括转向节支架和连接于转向节支架上的双叉臂,所述转向节支架上连接有滚珠丝杠机构,所述滚珠丝杠机构位于所述双叉臂上方,所述滚珠丝杠机构包括丝杠和可沿所述丝杠垂直升降的滚珠滑台,所述滚珠滑台上固定有用于支撑车身的支撑机构,所述丝杠连接有用于驱动其转动的蜗轮蜗杆机构。基于螺旋弹簧结构,通过使用滚珠丝杠结构来调节车辆的姿态,结构简单、易于布置、成本低廉。采用蜗轮蜗杆结构传动,具有自锁功能,结构可靠。通过控制悬架高度,实现不同的离地间隙,使车辆在保证操控性的同时提高了通过性。通过车辆的四个悬架相互独立,可通过控制悬架两侧的高度差,提高车辆抗侧倾能力。(The invention discloses a double-fork-arm suspension structure with an adjustable vehicle body posture, which comprises a steering knuckle support and double fork arms connected to the steering knuckle support, wherein a ball screw mechanism is connected to the steering knuckle support and positioned above the double fork arms, the ball screw mechanism comprises a screw and a ball sliding table capable of vertically lifting along the screw, a supporting mechanism for supporting a vehicle body is fixed on the ball sliding table, and the screw is connected with a worm gear mechanism for driving the screw to rotate. Based on the spiral spring structure, the posture of the vehicle is adjusted by using the ball screw structure, and the device is simple in structure, easy to arrange and low in cost. The worm gear structure is adopted for transmission, so that the self-locking mechanism has a self-locking function and a reliable structure. Through controlling the suspension height, realize different ground clearance, make the vehicle improve trafficability characteristic when guaranteeing the nature controlled. The four suspensions of the vehicle are mutually independent, and the anti-roll capability of the vehicle can be improved by controlling the height difference of the two sides of the suspensions.)

1. The utility model provides a double-wishbone suspension structure of automobile body gesture adjustable, includes knuckle support (1) and connects the double-wishbone on knuckle support (1), its characterized in that: be connected with ball screw mechanism on knuckle support (1), ball screw mechanism is located the fork arm top of two, ball screw mechanism includes lead screw (2) and can follows lead screw (2) vertical lift's ball slip table (3), be fixed with the supporting mechanism who is used for supporting automobile body (25) on ball slip table (3), lead screw (2) are connected with and are used for driving its pivoted worm gear mechanism.

2. The double-wishbone suspension structure with adjustable body attitude of claim 1 wherein: the top and the bottom of the knuckle support (1) are respectively and fixedly connected with an upper yoke connecting support (4) and a lower yoke connecting support (5), and the bottom of the upper yoke connecting support (4) and the bottom of the lower yoke connecting support (5) are respectively hinged with a yoke (6); the ball screw mechanism is connected to the top of the upper fork arm connecting support (4).

3. The double-wishbone suspension structure with adjustable body attitude of claim 2 wherein: the ball screw mechanism comprises a screw base (7), the middle part of the screw base (7) is hinged with the screw (2) vertical to the screw base, the top of the screw (2) is connected with the worm gear mechanism, and the left side and the right side of the screw base (7) are respectively fixed with a guide rod (8) vertical to the screw base; the middle part of the ball sliding table (3) is provided with a threaded hole matched with the screw rod (2), and the left side and the right side of the ball sliding table (3) are respectively provided with a through hole matched with the guide rod (8).

4. The double-wishbone suspension structure with adjustable body attitude of claim 3 wherein: and balls are arranged between the threaded holes of the ball sliding tables (3) and the threads of the screw rod (2).

5. The double-wishbone suspension structure with adjustable body attitude of claim 3 wherein: the screw rod (2) comprises a screw rod thread section (2.2) in the middle, a screw rod upper hinge shaft section (2.1) coaxially and fixedly connected to the top of the screw rod thread section (2.2) and a screw rod lower hinge shaft section (2.3) coaxially and fixedly connected to the bottom of the screw rod thread section (2.2); the upper hinged shaft section (2.1) of the lead screw is hinged with a worm and gear mounting plate (9), the worm and gear mounting plate (9) is fixed on the guide rod (8), and the worm and gear mechanism is arranged on the worm and gear mounting plate (9); the lower hinged shaft section (2.3) of the screw rod is hinged in the screw rod base (7).

6. The body attitude adjustable double wishbone suspension structure of claim 5 wherein: the middle part of worm wheel and worm mounting panel (9) is opened there is the bearing mounting hole, interference fit has lead screw upper end connection bearing (10) in the bearing mounting hole, articulated shaft section (2.1) is the step shaft section on the lead screw, include with lead screw upper end connection bearing (10) complex lead screw first go up articulated shaft section (11) and with articulated shaft section (12) on the lead screw first goes up articulated shaft section (11) coaxial fixed connection's the lead screw second, the diameter of articulated shaft section (12) is less than on the lead screw second the diameter of articulated shaft section (11) is first gone up to the lead screw, articulated shaft section (12) are connected on the lead screw second worm wheel and worm mechanism.

7. The body attitude adjustable double wishbone suspension structure of claim 6 wherein: the worm gear mechanism is including being fixed in motor (13) on worm gear mounting panel (9), with worm (14) that motor (13) are connected and with articulated shaft section (12) interference fit's worm wheel (15) are gone up to the lead screw second, worm (14) with worm wheel (15) mesh.

8. The body attitude adjustable double wishbone suspension structure of claim 5 wherein: the middle upper end of the lead screw base (7) is provided with a base upper groove (7.1), the base upper groove (7.1) is internally provided with a lead screw lower end connecting bearing (16) in an interference fit manner, and the lead screw lower hinged shaft section (2.3) is connected into the lead screw lower end connecting bearing (16).

9. The double-wishbone suspension structure with adjustable body attitude of claim 3 wherein: a screw rod base connecting support (17) is fixed at the top of the upper fork arm connecting support (4), and a support connecting shaft (18) is vertically arranged on the screw rod base connecting support (17); the lower end of the middle part of the lead screw base (7) is provided with a base lower groove (7.2), a base connecting bearing (19) is arranged in the base upper groove (7.2) in an interference fit mode, and the base connecting bearing (19) is connected onto the support connecting shaft (18).

10. The double-wishbone suspension structure with adjustable body attitude of claim 1 wherein: the supporting mechanism is including being fixed in shock absorber (20) on ball slip table (3) and being located automobile body support bracket (21) of shock absorber (20) top, shock absorber (20) are including shock absorber connecting rod (22) of perpendicular setting, the top of shock absorber connecting rod (22) be fixed with can with automobile body support bracket (21) cooperation, restriction automobile body support bracket (21) stopper (23) that move down the position, automobile body support bracket (21) with be connected with supporting spring (24) between shock absorber (20).

Technical Field

The invention relates to the technical field of automobile bottom plates, in particular to a double-fork-arm suspension structure with an adjustable automobile body posture.

Background

When a vehicle is designed, the attitude of the vehicle is generally considered, and the performance of the vehicle is influenced by an excessively high attitude value or an excessively low attitude value. Too low a pose may affect vehicle trafficability; however, the excessively high attitude will make the center of gravity of the vehicle higher, which affects the steering stability. In order to reduce the influence of the attitude on the performance of the vehicle, the attitude-adjustable suspension is generated.

At present, most of the attitude-adjustable suspensions on the market are hydro-pneumatic spring suspensions. The height and the rigidity of the spring can be adjusted by controlling the pressure in the hydro-pneumatic spring, so that the posture of the vehicle can be changed. The hydro-pneumatic spring has the advantages of improving riding comfort under different working conditions, improving trafficability, reducing tire wear, reducing vehicle load fluctuation, improving vehicle adhesion and the like. On the other hand, the hydro-pneumatic spring is usually only used for middle and high-end vehicle types due to the defects of high sealing requirement, easy aging, poor durability, high cost and the like.

There are also suspensions for adjusting attitude by mechanical transmission, such as CN201220045216.6 (an automatic adjusting device for vehicle body ground clearance) and CN201910605271.2 (a two-wishbone suspension, an automatic adjusting system and method for two-wishbone suspension) which describe methods for changing height of vehicle body by electric lift. However, these structures are all installed in a narrow space such as a knuckle or a spring end, which is not favorable for the arrangement of the lifting mechanism, and these electric lifting devices cannot be self-locked by the mechanism, so that there is a certain danger.

Disclosure of Invention

The invention aims to solve the defects of the background technology and provide a double-fork arm suspension structure with self-locking performance and convenient arrangement and adjustable vehicle body posture.

In order to achieve the purpose, the double-fork-arm suspension structure with the adjustable vehicle body posture, which is designed by the invention, comprises a steering knuckle support and double fork arms connected to the steering knuckle support, and is characterized in that: the steering knuckle support is connected with a ball screw mechanism, the ball screw mechanism is located above the double-fork arm, the ball screw mechanism comprises a screw and a ball sliding table capable of vertically lifting the screw, a supporting mechanism used for supporting an automobile body is fixed on the ball sliding table, and the screw is connected with a worm gear mechanism used for driving the rotation of the screw.

Furthermore, the top and the bottom of the knuckle support are respectively and fixedly connected with an upper yoke connecting support and a lower yoke connecting support, and the bottom of the upper yoke connecting support and the bottom of the lower yoke connecting support are respectively and hingedly connected with a yoke; the ball screw mechanism is connected to the top of the upper yoke connecting bracket.

Furthermore, the ball screw mechanism comprises a screw base, the middle part of the screw base is hinged with a screw vertical to the screw base, the top of the screw is connected with the worm gear mechanism, and the left side and the right side of the screw base are respectively fixed with a guide rod vertical to the screw; the middle part of the ball sliding table is provided with a threaded hole matched with the lead screw, and the left side and the right side of the ball sliding table are respectively provided with a through hole matched with the guide rod.

Furthermore, a ball is arranged between the threaded hole of the ball sliding table and the thread of the lead screw.

Further, the screw comprises a screw thread section in the middle, a screw upper hinge shaft section coaxially and fixedly connected to the top of the screw thread section, and a screw lower hinge shaft section coaxially and fixedly connected to the bottom of the screw thread section; the upper hinged shaft section of the lead screw is hinged with a worm gear mounting plate, the worm gear mounting plate is fixed on the guide rod, and the worm gear mechanism is arranged on the worm gear mounting plate; the lower hinged shaft section of the screw rod is hinged and connected in the screw rod base.

Further, the middle part of worm gear mounting panel is opened there is the bearing mounting hole, interference fit has lead screw upper end connection bearing in the bearing mounting hole, articulated shaft section is the step shaft section on the lead screw, include with the lead screw upper end connection bearing complex lead screw first go up articulated shaft section and with articulated shaft section on the lead screw first goes up the coaxial fixed connection's of articulated shaft section lead screw second, the diameter of articulated shaft section is less than on the lead screw second the diameter of articulated shaft section on the lead screw first, articulated shaft section is connected on the lead screw second worm gear mechanism.

Further, worm gear mechanism including be fixed in motor on the worm gear mounting panel, with the worm that the motor is connected and with articulated shaft coupling on the lead screw second and with articulated shaft coupling interference fit's worm wheel on the lead screw second, the worm with the worm wheel meshing.

Furthermore, the upper end of the middle part of the lead screw base is provided with a base upper groove, the lower end of the lead screw is connected with the bearing in the base upper groove in an interference fit manner, and the lower hinged shaft section of the lead screw is connected into the lower end of the lead screw and is connected into the bearing.

Further, a lead screw base connecting support is fixed at the top of the upper fork arm connecting support, and a support connecting shaft is vertically arranged on the lead screw base connecting support; the lower end of the middle part of the screw rod base is provided with a base lower groove, a base connecting bearing is arranged in the base upper groove in an interference fit mode, and the base connecting bearing is connected onto the support connecting shaft.

Furthermore, the supporting mechanism comprises a shock absorber fixed on the ball sliding table and a vehicle body supporting bracket positioned above the shock absorber, the shock absorber comprises a shock absorber connecting rod which is vertically arranged, a limiting block which can be matched with the vehicle body supporting bracket and limits the downward movement position of the vehicle body supporting bracket is fixed at the top of the shock absorber connecting rod, and a supporting spring is connected between the vehicle body supporting bracket and the shock absorber.

The invention has the beneficial effects that: based on the spiral spring structure, the posture of the vehicle is adjusted by using the ball screw structure, and the device is simple in structure, easy to arrange and low in cost. The worm gear structure is adopted for transmission, so that the self-locking mechanism has a self-locking function and a reliable structure. Through controlling the suspension height, realize different ground clearance, make the vehicle improve trafficability characteristic when guaranteeing the nature controlled. The four suspensions of the vehicle are mutually independent, and the anti-roll capability of the vehicle can be improved by controlling the height difference of the two sides of the suspensions.

Drawings

FIG. 1 is an isometric view of a suspension arrangement of the present invention;

FIG. 2 is an exploded view of the suspension arrangement of the present invention;

FIG. 3 is a cross-sectional view of the lift platform assembly of the present invention;

FIG. 4 is a perspective view of the lead screw base and guide rod of the present invention;

FIG. 5 is a longitudinal cross-sectional view of FIG. 4;

FIG. 6 is an isometric view of a screw of the present invention;

FIG. 7 is a schematic view of the attachment of the double-cantilever suspension to the vehicle body according to the present invention;

wherein, 1-knuckle support, 2-lead screw (2.1-upper hinged shaft section of lead screw, 2.2-thread section of lead screw, 2.3-lower hinged shaft section of lead screw), 3-ball sliding table, 4-upper yoke connecting support, 5-lower yoke connecting support, 6-yoke, 7-lead screw base (7.1-upper groove of base, 7.2-lower groove of base), 8-guide bar, 9-worm gear mounting plate, 10-upper end of lead screw connecting bearing, 11-first upper hinged shaft section of lead screw, 12-second upper hinged shaft section of lead screw, 13-motor, 14-worm, 15-worm gear, 16-lower end of lead screw connecting bearing, 17-lead screw base connecting support, 18-support connecting shaft, 19-base connecting bearing, 20-vibration absorber, 21-body supporting support, 22-vibration absorber connecting rod, 23-limiting block, 24-supporting spring, 25-body, 26-flat key, 27-screw, 28-upper ball pin, 29-lower ball pin.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

The double-wishbone suspension structure with the adjustable vehicle body posture as shown in fig. 1-7 comprises a knuckle support 1, wherein the top and the bottom of the knuckle support 1 are fixedly connected with an upper wishbone connecting support 4 and a lower wishbone connecting support 5 respectively, and the bottom of the upper wishbone connecting support 4 and the bottom of the lower wishbone connecting support 5 are respectively hinged with a wishbone 6; the ball screw mechanism is attached to the top of the upper yoke connecting bracket 4.

The ball screw mechanism comprises a screw base 7, the middle of the screw base 7 is hinged with a lead screw 2 vertical to the lead screw, the lead screw 2 is connected with a ball sliding table 3 capable of vertically lifting along the lead screw 2, a supporting mechanism used for supporting the vehicle body 25 is fixed on the ball sliding table 3, and the top of the lead screw 2 is connected with a worm gear mechanism used for driving the lead screw to rotate.

The left side and the right side of the screw base 7 are respectively fixed with a guide rod 8 vertical to the screw base; the middle part of the ball sliding table 3 is provided with a threaded hole matched with the screw rod 2, and the left side and the right side of the ball sliding table 3 are respectively provided with a through hole matched with the guide rod 8. And balls are arranged between the threaded holes of the ball sliding table 3 and the threads of the screw rod 2.

The screw 2 comprises a screw thread section 2.2 in the middle, a screw upper hinge shaft section 2.1 coaxially and fixedly connected to the top of the screw thread section 2.2 and a screw lower hinge shaft section 2.3 coaxially and fixedly connected to the bottom of the screw thread section 2.2; the hinged shaft section 2.1 on the screw rod is hinged with a worm and gear mounting plate 9, the worm and gear mounting plate 9 is fixed on the guide rod 8, and the worm and gear mechanism is arranged on the worm and gear mounting plate 9; the lower hinged shaft section 2.3 of the screw rod is hinged and connected in the screw rod base 7 (the upper end of the middle part of the screw rod base 7 is provided with an upper base groove 7.1, the upper base groove 7.1 is internally provided with a lower screw rod end connecting bearing 16 in an interference fit manner, and the lower hinged shaft section 2.3 of the screw rod is connected in the lower screw rod end connecting bearing 16).

A screw base connecting bracket 17 is fixed at the top of the upper yoke connecting bracket 4, and a bracket connecting shaft 18 is vertically arranged on the screw base connecting bracket 17; the lower end of the middle part of the screw base 7 is provided with a base lower groove 7.2, a base connecting bearing 19 is arranged in the base upper groove 7.2 in an interference fit mode, and the base connecting bearing 19 is connected onto the support connecting shaft 18.

The middle part of worm gear mounting panel 9 is opened there is the bearing mounting hole, interference fit has lead screw upper end connection bearing 10 in the bearing mounting hole, articulated shaft section 2.1 is the step shaft section on the lead screw, include with the lead screw upper end connection bearing 10 complex lead screw first go up articulated shaft section 11 and with the lead screw first go up articulated shaft section 11 coaxial fixed connection's lead screw second go up articulated shaft section 12, the diameter of articulated shaft section 12 is less than the diameter of first last articulated shaft section 11 of lead screw on the lead screw second, articulated shaft section 12 is connected worm gear mechanism on the lead screw second.

The worm and gear mechanism comprises a motor 13 fixed on the worm and gear mounting plate 9, a worm 14 connected with the motor 13 and a worm gear 15 connected with the second upper hinge shaft section 12 of the lead screw and in interference fit with the second upper hinge shaft section 12 of the lead screw, and the worm 14 is meshed with the worm gear 15.

The support mechanism comprises a shock absorber 20 fixed on the ball sliding table 3 and a vehicle body support bracket 21 positioned above the shock absorber 20, the shock absorber 20 comprises a shock absorber connecting rod 22 which is vertically arranged, a limiting block 23 which can be matched with the vehicle body support bracket 21 and limits the downward moving position of the vehicle body support bracket 21 is fixed at the top of the shock absorber connecting rod 22, and a support spring 24 is connected between the vehicle body support bracket 21 and the shock absorber 20.

The invention is based on a spiral spring structure, adjusts the posture of the vehicle by using a ball screw structure, and has the advantages of simple structure, easy arrangement and low cost. The worm gear mechanism is adopted for transmission, so that the self-locking mechanism has a self-locking function and a reliable structure. Through controlling the suspension height, realize different ground clearance, make the vehicle improve trafficability characteristic when guaranteeing the nature controlled. The four suspensions of the vehicle are mutually independent, and the anti-roll capability of the vehicle can be improved by controlling the height difference of the two sides of the suspensions.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.