CN105235461A - Trailing arm - Google Patents

Abstract

The invention provides a trailing arm. The trailing arm comprises an upper swing arm plate and a wheel axle, wherein linings are arranged at one end of the upper swing arm plate; an arc-shaped groove is formed in the other end of the upper swing arm plate; one end of the wheel axle is fixed in the arc-shaped groove; and a lower shock absorber installation support is arranged on the outer sidewall of the arc-shaped groove. The trailing arm provided by the invention has the beneficial effect that accuracy and stability are improved.

Description

A kind of towing arm

Technical field

The present invention relates to single oblique arm type suspension, particularly relate to a kind of towing arm.

Background technology

Single oblique arm type suspension is a kind of suspension frame structure between single horizontal type and single trailling arm type suspension.The pivot center of swing arm and the longitudinal axis angulation of automobile are between 0 °-90 °.The angle in volatility oblique arm pivot center space again, can regulating wheel distance, Camber angle, toe-in and height of roll center change, thus obtain good road-holding property.

The advantage of single oblique arm type suspension:

1, between brace and oscillating axle, good compromise is had.

2, potential is designed preferably by having the optimization of pendulum arm angle.

3, have mutually independently wheel mass, beating of single wheel is less on opposite side impact.

4, larger space can be reserved between horizontal swinging arm, this for compact conformation minicar very useful.

The shortcoming of single oblique arm type suspension:

1, when camber of spring is beated, wheel side change of pitch angle is larger.

2, the kinematic design of Camber angle and toeing-in can not be separate.

3, bar and hinge-point must have good rigidity.

4, only just good traveling comfort can be had when wheel stand use rubber shaft bearing.

Single oblique arm type suspension, since the beginning of the sixties comes out, the rear suspension of rear drive vehicle has been widely applied.At present owing to proposing requirements at the higher level to automobile ride and road-holding property, some automobile have employed the more complicated double wish-bone arm type of structure or multi link formula independent suspension, but not high for moving velocity, manipulation request is not high and the mini electric vehicle that structure is compact, single oblique arm type suspension exactly can play again its advantage, coordinates the rubber bush of applicable rigidity just can obtain taking into account the effect in manipulation, traveling comfort, space again by the center of turn position spatially adjusting single oblique arm type suspension.

The feature of existing tubulose single oblique arm type independent suspension is integrated on shock absorber strut by spring, is similar to the shock absorber strut assembly of front overhang, is installed on single-oblique-arm afterwards by vibration damper complement, analyzed and the installing space angle of shock absorber is considered to determine in space by KC.

In making proof procedure, there is following problem in this structure:

1), need to find the section bar meeting GB specification.

2), can there is resilience in section bar after bending, is difficult to the precision ensureing lining attachment point.

3), the stability of single-oblique-arm is difficult to ensure.

Summary of the invention

In order to solve the problems of the prior art, the invention provides that a kind of precision is high, the towing arm of good stability.

The invention provides a kind of towing arm, comprise swing arm upper plate and axletree, one end of described swing arm upper plate is provided with lining, the other end of described swing arm upper plate is provided with circular groove, one end of described axletree is fixed in described circular plate type groove, and the lateral wall of described circular groove is provided with mounting bracket under shock absorber.

As a further improvement on the present invention, circular arc pad is provided with between described circular plate type groove, axletree.

As a further improvement on the present invention, the width of described circular arc pad is between 16mm to 20mm.

As a further improvement on the present invention, described lining has two and arranges in bifurcated.

As a further improvement on the present invention, the intersection between two described linings is provided with rounding.

As a further improvement on the present invention, the radius of described rounding is between 40mm to 100mm.

As a further improvement on the present invention, the axis of described axletree and horizontal angle are 1 degree.

The invention has the beneficial effects as follows: by such scheme, improve precision and stability.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of towing arm of the present invention.

Fig. 2 is the lateral plan of a kind of towing arm of the present invention.

Fig. 3 is the back view of a kind of towing arm of the present invention.

Detailed description of the invention

Illustrate below in conjunction with accompanying drawing and detailed description of the invention the present invention is further described.

Drawing reference numeral in Fig. 1 to Fig. 3 is: swing arm upper plate 1; Mounting bracket 2 under shock absorber; Lining 3; Axletree 4; Circular arc pad 5.

As shown in Figure 1, a kind of towing arm, comprise swing arm upper plate 1 and axletree 4, one end of described swing arm upper plate 1 is provided with lining 3, the other end of described swing arm upper plate 1 is provided with circular groove, one end of described axletree 4 is fixed in described circular plate type groove, and the lateral wall of described circular groove is provided with mounting bracket 2 under shock absorber.

As shown in Figure 1, circular arc pad 5 is provided with between described circular plate type groove, axletree 4.

As shown in Figure 1, the width of described circular arc pad 5 is between 16mm to 20mm.

As shown in Figure 1, described lining 3 has two and arranges in bifurcated.

As shown in Figure 1, the intersection between two described linings 3 is provided with rounding.

As shown in Figure 1, the radius of described rounding is between 40mm to 100mm.

As shown in Figure 1, the axis of described axletree 4 and horizontal angle are 1 degree.

As shown in Figure 2,3, in figure, A point is the center of circle, cross section of axletree 4 and single-oblique-arm contact position, B, C lay respectively on the line of centers 101,102 of two linings 3,16mm≤h1≤20mm, 60mm≤R1≤100mm, 40mm≤R2≤60mm, 40mm≤R3≤60mm, 60mm≤R4≤100mm, 20mm≤R5≤40mm, 40mm≤R6≤100mm, 40mm≤R7≤80mm.

In Fig. 1, demarcation line 103 right half part is symmetrical about the plane (as Fig. 2) determined by A, B, C 3, and 28mm≤h2≤32mm.

When swing arm is welded with two linings 3, the welding distance of 4-5mm be reserved.

Axis 104 and horizon 105 angle of axletree 4 are 1 °, namely ensure that wheel has the negative camber angle of 1 °, as shown in Figure 2.

Between swing arm upper plate 1 and axletree 4, add the circular arc pad 5 that one piece of width is 16mm-20mm, and ensure swing arm upper plate 1 and circular arc pad 5, the distance between axletree 4 and circular arc pad 5 is 0.5mm-1mm.

Single-oblique-arm seam assembly welding sequencing brief description:

(1) first axletree 4 is welded at position 6 place with circular arc pad 5;

(2) swing arm upper plate 1 is peripherally welded with lower plate, peripherally weld with lining 3 more afterwards;

(3) axletree 4 and the circular arc pad 5 that the first step are welded are inserted in swing arm, more peripherally weld a circle at position 7 place.

The advantage of a kind of towing arm provided by the invention is as follows:

1, spring and bump rubber are integrated in shock absorber, make towing arm bearing load position mainly near mounting bracket 2, reduce towing arm stress and concentrate under shock absorber herein apart from the nearly rigidity of hub spindle greatly.

2, Control arm upper slice and lower chip architecture is simple, punching formation property good, manufacture simple, production efficiency is high.

3, circular arc pad 5 to ensure slice and bottom sheet and hub spindle lap-joint are regular circular arc, and transition is mild, is easy to pressing and jointing.

4, extending liner to adding mounting bracket 2 lap position under shock absorber, increasing towing arm rigidity herein, avoid stress to concentrate.

A kind of towing arm provided by the invention is single oblique arm type independent suspension, redesign the structure of swing arm, swing arm structure adopts the form of blanked part, not only be easy to shaping, also ensure that the precision of lining installation site simultaneously, the requirement taking into account manipulation and traveling comfort can be reached by the coupling of the locus compound rubber lining rigidity again adjusting the center of turn line of single-oblique-arm; This novel single-oblique-arm swing arm simultaneously adopts the form of non complete symmetry, not only be able to attractive in appearance in appearance, and uniform structure makes distribution of stress even, and loss of weight 10%, while guarantee is structure lightened, also ensure that the stability of rear overhang entirety, improves the safety factor of rear overhang in running car.

Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.

Claims (7)

1. a towing arm, it is characterized in that: comprise swing arm upper plate and axletree, one end of described swing arm upper plate is provided with lining, the other end of described swing arm upper plate is provided with circular groove, one end of described axletree is fixed in described circular plate type groove, and the lateral wall of described circular groove is provided with mounting bracket under shock absorber.

2. towing arm according to claim 1, is characterized in that: be provided with circular arc pad between described circular plate type groove, axletree.

3. towing arm according to claim 2, is characterized in that: the width of described circular arc pad is between 16mm to 20mm.

4. towing arm according to claim 1, is characterized in that: described lining has two and arranges in bifurcated.

5. towing arm according to claim 4, is characterized in that: the intersection between two described linings is provided with rounding.

6. towing arm according to claim 5, is characterized in that: the radius of described rounding is between 40mm to 100mm.

7. towing arm according to claim 1, is characterized in that: the axis of described axletree and horizontal angle are 1 degree.