CN203601376U - Breaking type steering trapezium structure of electric motor coach - Google Patents

Abstract

The utility model relates to the field of trapezium structures, in particular to a breaking type steering trapezium structure of an electric motor coach. The breaking type steering trapezium structure comprises two left-right horizontal pull rods (1), two steering ball pins (2), two steering knuckle arms (3) and a gear and rack steering device (4), the two ends of the gear and rack steering device (4) are connected with the left-right horizontal pull rods (1) respectively, and the other ends of the left-right horizontal pull rods (1) are connected with the steering knuckle arms (3) through the steering ball pins (3) respectively. The trapezium structure has the advantages of being simplified in design and easy to arrange; meanwhile, the requirement for arrangement of a low floor of the whole coach is met.

Description

A disconnected steering trapezoidal structure for an electric passenger car

technical field

The utility model relates to the field of a steering trapezoidal structure, in particular to a disconnected steering trapezoidal structure of an electric passenger car.

Background technique

In the field of electric minibuses, most domestic manufacturers borrow the original traditional bus chassis structure and adopt an integral steering front axle and an integral steering trapezoidal structure. This structural design has a large space occupied by the steering straight rod and poor vehicle comfort. , Poor maneuverability, large turning radius, etc., and basically unable to meet the requirements of low-floor layout.

In response to this problem, some manufacturers have begun to develop a disconnected steering trapezoidal structure that matches the double-wishbone independent suspension based on the consideration of vehicle comfort and operational stability. The current disconnected steering trapezoidal structure generally passes The rocker arm is driven by the power-assisted steering gear, so that the trapezoidal structure is realized through the complex cooperation of disconnected steering rods. The trapezoidal structure has many steering rods, and the arrangement and adjustment are too complicated, and it is not conducive to the structural arrangement of the low-floor compartment of the whole vehicle.

Utility model content

Aiming at the defects existing in the prior art, the purpose of this utility model is to provide a disconnected steering trapezoidal structure for an electric passenger car. The trapezoidal structure has the advantages of simplified design and easy layout, and at the same time can meet the layout requirements of the vehicle's low floor.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a disconnected steering trapezoidal structure of an electric bus, including two left and right tie rods, two steering ball studs, two steering knuckle arms and a rack and pinion steering Two ends of the rack and pinion steering gear are respectively connected to a left and right tie rod, and the other end of each left and right tie rod is connected to a steering knuckle arm through a steering ball stud.

On the basis of the above solution, the rack and pinion steering gear is installed on the sub-frame in a three-point installation manner, and is fixed by a bushing and a lock nut.

On the basis of the above solution, the rack and pinion steering gear is a hydraulic rack and pinion steering gear with output at both ends.

On the basis of the above solution, the maximum stroke of the rack and pinion steering gear reaches 174mm, and under the action of 10MPa oil pressure, it has an output force of 16.38KN.

On the basis of the above solution, the initial base angle α of the trapezoidal structure is 71°.

On the basis of the above solution, the length of the steering knuckle arm is 169 mm.

The beneficial effects of the utility model are:

1. Both ends of the steering gear and rack steering gear are connected to a left and right tie rod respectively, and the left and right tie rods are connected to the steering knuckle arm through a ball pin. With this structure, the left and right tie rods are easy to arrange and adjust.

2. The initial bottom angle of the trapezoidal structure is 71°, the length of the steering knuckle arm is set to 169mm, and the arrangement of breakpoints cooperates with the double-wishbone independent suspension to ensure that the steering interference occurs when the wheel jumps up and down by ±60mm. The angle is less than 0.5°, which reduces tire wear and enhances the comfort and operation stability of the vehicle.

3. Compared with the conventional power steering gear, the rack and pinion steering gear has a larger output force and stroke. The maximum stroke of the rack and pinion steering gear can reach 174mm, and under the action of 10MPa oil pressure, it has The output force of 16.38KN meets the requirements of the steering force of the 3T front axle load and the maximum inner and outer wheel turning angle of 30°/38.1°, thus meeting the requirement of the minimum turning radius of the whole vehicle of 7m.

4. The rack and pinion steering gear adopts a three-point installation method, and is fixedly installed on the sub-frame through the bushing lock nut, thereby saving installation space and shortening the front suspension, which matches the reasonable arrangement of the double-wishbone independent suspension , meeting the layout requirements of the vehicle's low floor.

Description of drawings

Fig. 1 is a structural schematic diagram of a disconnected steering trapezoidal structure of an electric passenger car according to the present invention.

Reference signs: left and right tie rods 1; steering ball stud 2; steering knuckle arm 3; rack and pinion steering gear 4; base angle α.

Detailed ways

Embodiments of the utility model will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the electric bus of the utility model has a disconnected steering trapezoidal structure, including two left and right tie rods 1, two steering ball studs 2, two steering knuckle arms 3 and a rack and pinion steering gear 4. The rack and pinion steering gear 4 is a hydraulic rack and pinion steering gear with output at both ends, and the rack and pinion steering gear 4 adopts a three-point installation method, and is fixedly installed on the sub-frame through a sleeve pin nut. The two left and right tie rods 1 are respectively arranged symmetrically on both sides of the rack and pinion steering gear 4, and one end of each of the left and right tie rods 1 passes through one steering ball stud 2 and one steering knuckle. The arm 3 is connected, and the other end is connected with the rack and pinion steering gear 4 . The initial base angle α of the trapezoidal structure is 71°, and the length of the steering knuckle arm 3 is 169 mm.

When the electric bus needs to turn, the driver turns the steering wheel, and the hydraulic power assist system drives the gear of the rack and pinion steering gear 4 to rotate, so that the rack meshed with it moves, so that the left and right tie rods 1 drive the steering knuckle arm 3, and the steering wheel Left and right deflection, so as to realize the steering of the electric bus. After the steering wheel returns to the right position, under the action of the rack and pinion steering gear 4, the left and right tie rods 1 drive the steering knuckle arm 3 to make the steering wheel return to the right position.

The utility model is not only limited to the above-mentioned best implementation mode, anyone can draw other various forms of products under the enlightenment of the utility model, but no matter make any changes in its shape or structure, anyone who has the same features as the utility model The same or similar technical solutions are all within the scope of protection.

Claims (6)

1. an electrobus divided steering linkage structure, comprise two left and right intermediate rods (1), two steering ball end pins (2), two track arms (3) and a rack and pinion steering gear (4), it is characterized in that: described rack and pinion steering gear (4) two ends connect respectively a left and right intermediate rod (1), the other end of each left and right intermediate rod (1) all connects a described track arm (3) by a steering ball end pin (2).

2. a kind of electrobus divided steering linkage structure as claimed in claim 1, is characterized in that: described rack and pinion steering gear (4) adopts 3 mounting meanss to be installed on subframe, and fixes by sleeve pipe and locknut.

3. a kind of electrobus divided steering linkage structure as claimed in claim 1, is characterized in that: the mekydro tooth bar deflector that described rack and pinion steering gear (4) is two ends output type.

4. a kind of electrobus divided steering linkage structure as claimed in claim 1, is characterized in that: the range of described rack and pinion steering gear (4) reaches 174mm, and under the effect of 10MPa oil pressure, has the power output of 16.38KN.

5. a kind of electrobus divided steering linkage structure as claimed in claim 1, is characterized in that: the initial base angle of described trapezium structure is 71 °.

6. a kind of electrobus divided steering linkage structure as claimed in claim 5, is characterized in that: the length of described track arm (3) is 169mm.

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