CN202418282U - High torsional rigidity intermediate shaft assembly for automatic gap compensation of steel balls - Google Patents

Abstract

The utility model discloses a high torsional rigidity intermediate shaft assembly for automatic gap compensation of steel balls. The high torsional rigidity intermediate shaft assembly is composed of a left end cardan joint part, a steel ball sliding structure and a right end cardan joint part. The left end cardan joint part is composed of a first section fork, a first cross-shaped bearing, a second section fork and a spline shaft. The right end cardan joint part is composed of a spline sleeve, a third section fork, a second cross-shaped bearing and a fourth section fork. The steel ball sliding structure comprises a spring piece, a spring piece bracket and steel balls, and the spring piece, the spring piece bracket and the steel balls are placed between the spline shaft and the spline sleeve. The elasticity of the spring piece can play a role of automatical gap compensation and shock absorption in the movement, gaps in the rotation direction are eliminated, and the torsional rigidity of an intermediate shaft can be improved, therefore, the steering response time (sensitivity) is improved, the vibration is reduced when a steering wheel is positively and negatively rotated, steering abnormal sound is avoided, and manipulation comfort is improved.

Description

The high torsional rigid countershaft assembly of steel ball automatic backlash compensation

Technical field

The utility model relates to the high torsional rigid countershaft assembly of the steel ball automatic backlash compensation that a kind of automobile steering system uses.

Background technique

Countershaft assembly is one of important components in the automobile steering system, and the magnitude relationship of the torsional rigid of countershaft assembly is to the response time of steering system, particularly in electric boosting steering system.But existing countershaft assembly is because structural reason, and the sense of rotation gap is bigger, a little less than the torsional rigid, in the motion vibration bigger, noise is big, causes easily to turn to abnormal sound; Have hysteresis quality when transmitting movement and moment of torsion, steering sensitivity is poor.

The model utility content

The technical problem that the utility model will solve is: bigger in order to overcome existing countershaft assembly sense of rotation gap, a little less than the torsional rigid, in the motion vibration bigger, noise is big, causes easily to turn to abnormal sound; Has hysteresis quality when transmitting movement and moment of torsion, problems such as steering sensitivity difference, the high torsional rigid countershaft assembly that provides a kind of steel ball automatic backlash to compensate.

The utility model solves the technological scheme that its technical problem adopted: a kind of high torsional rigid countershaft assembly of steel ball automatic backlash compensation; It is characterized in that: form by left end universal joint parts, steel ball sliding motion structure and right-hand member universal joint parts; Left end universal joint parts are made up of first segment fork, first cross-bearing, the second joint fork and splined shaft; The first segment fork and the second joint fork are through the riveted joint of first cross-bearing, and the second joint fork is through internal spline and the riveted joint of splined shaft external splines;

Right-hand member universal joint parts are made up of splined sleeve, the 3rd joint fork, second cross-bearing and the 4th joint fork, and the 3rd joint fork and the 4th joint fork are through the riveted joint of second cross-bearing, and the 3rd joint fork internal spline is connected with splined sleeve external splines riveting;

The steel ball sliding motion structure comprises spring sheet, spring piece bracket and steel ball, thereby the spring sheet of packing between splined shaft and the splined sleeve, spring bracket and steel ball form intermediate shaft part.

Described first cross-bearing is identical with the second cross-bearing structure, forms by cross, needle roller and four bearing caps.

The beneficial effect of the utility model is: the be hit by a bullet elasticity of reed of motion can play automatic compensation gap and damping.Eliminate the gap of sense of rotation, can improve the torsional rigid of jack shaft, thereby improve the steering response time (sensitivity), when the steering wheel clockwise and anticlockwise, reduce vibration, avoid occurring turning to abnormal sound, improve handling comfort; The steering system that can be used for transmitting large torque comprises hydraulic pressure, EPS.

Description of drawings

Fig. 1 is the plan view of the utility model;

Fig. 2 is the cross-bearing sectional view of the utility model;

Fig. 3 is the steel ball slip sectional view of the utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further specified.

As shown in Figure 1; Said universal joint parts, about the end each one, mainly be with the transmission of moment of torsion multi-angle; Left end universal joint parts are made up of first segment fork 1, first cross-bearing 2, the second joint fork 3, splined shaft 4; First segment the fork 1 and second joint fork 3 is through linking together with first cross-bearing, 2 rivetings, and the second joint fork 3 is connected with the external splines riveting of splined shaft 4 through internal spline, and so left universal joint has just formed.Right-hand member universal joint parts are saved fork 14 and are formed by splined sleeve 7, the 3rd joint fork 13, second cross-bearing the 2, the 4th; The 3rd joint fork the 13 and the 4th joint fork 14 is through linking together with second cross-bearing, 12 rivetings; The internal spline of the 3rd joint fork 13 is connected through pressing with the external splines of splined sleeve 7, and so right universal joint has just formed.The universal joint major function is to transmit the moment of torsion of different amount, is convenient to install adjustment.

As shown in Figure 2, said first cross-bearing 2 is identical with the second cross-bearing structure, forms by cross 2.1, needle roller 2.2 and 4 bearing caps 2.3.The standard piece that cross-bearing formula specialized factory makes according to automotive industry standards.

Like Fig. 1, shown in 3, said steel ball sliding motion structure comprises spring sheet 8, spring piece bracket 11 and steel ball 9, and this structure is the key structure of the utility model, also is the structure that connects two universal joints.The splined shaft 4 of left end universal joint is pressed into the splined sleeve 7 interior (promptly forming intermediate shaft part) of right-hand member universal joint through internal spline; And the spring sheet 8 of between inner and outer surface, packing into, spring sheet supporting frame 11 and steel ball 9; The be hit by a bullet resiliently deformable of reed of motion can play automatic compensation steering gap and cushioning effect, eliminates the gap of sense of rotation, can improve the torsional rigid of jack shaft; Thereby improve the steering response time (sensitivity); When the steering wheel clockwise and anticlockwise, reduce vibration, avoid occurring turning to abnormal sound, improve handling comfort.

Claims (2)

1. the high torsional rigid countershaft assembly of steel ball automatic backlash compensation; It is characterized in that: form by left end universal joint parts, steel ball sliding motion structure and right-hand member universal joint parts; Left end universal joint parts are made up of first segment fork, first cross-bearing, the second joint fork and splined shaft; The first segment fork and the second joint fork are through the riveted joint of first cross-bearing, and the second joint fork is through internal spline and the riveted joint of splined shaft external splines;

Right-hand member universal joint parts are made up of splined sleeve, the 3rd joint fork, second cross-bearing and the 4th joint fork, and the 3rd joint fork and the 4th joint fork are through the riveted joint of second cross-bearing, and the 3rd joint fork internal spline is connected with splined sleeve external splines riveting;

The steel ball sliding motion structure comprises spring sheet, spring piece bracket and steel ball, thereby the spring sheet of packing between splined shaft and the splined sleeve, spring bracket and steel ball form intermediate shaft part.

2. the high torsional rigid countershaft assembly of steel ball automatic backlash compensation according to claim 1, it is characterized in that: described first cross-bearing is identical with the second cross-bearing structure, forms by cross, needle roller and four bearing caps.

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