阅读说明：本技术 一种应用于循环球转向器的内外花键联接结构 (Internal and external spline connecting structure applied to recirculating ball steering gear ) 是由 刘东臣 向如洁 许斌 谢俊卿 李增平 于 2019-11-28 设计创作，主要内容包括：本发明公开了一种应用于循环球转向器的内外花键联接结构,包括上壳体和下壳体,述上壳体内部转动设置有输入轴组件,所述上壳体的一侧边上设置有带动输入轴组件转动的转向电机,所述输入轴组件内部插接安装有扭杆,所述下壳体内部转动设置有一组螺杆,所述上壳体与下壳体之间通过若干组螺栓进行固定,所述上壳体与下壳体之间设置有一组配合轴,且配合轴设置在扭杆和螺杆之间,所述上壳体和下壳体以及配合轴固定后组合形成一组转向器本体。该应用于循环球转向器的内外花键联接结构,设计合理,以内外花键配合的方式作为过渡联接应用于循环球转向器,替代传统配钻结构,可以很好地提高循环球转向器的装配工艺性能,适合推广使用。(The invention discloses an internal and external spline connecting structure applied to a recirculating ball steering gear, which comprises an upper shell and a lower shell, wherein an input shaft assembly is rotatably arranged in the upper shell, a steering motor for driving the input shaft assembly to rotate is arranged on one side edge of the upper shell, a torsion bar is inserted and installed in the input shaft assembly, a group of screw rods are rotatably arranged in the lower shell, the upper shell and the lower shell are fixed through a plurality of groups of bolts, a group of matched shafts are arranged between the upper shell and the lower shell and arranged between the torsion bar and the screw rods, and the upper shell, the lower shell and the matched shafts are fixed and then combined to form a group of steering gear bodies. This be applied to inside and outside spline connection structure of recirculating ball steering gear, reasonable in design uses transition hookup as inside and outside spline fit's mode to be applied to the recirculating ball steering gear, replaces traditional match and bores the structure, can improve the assembly process performance of recirculating ball steering gear well, is fit for using widely.)

1. The utility model provides an be applied to inside and outside spline connection structure of recirculating ball steering gear, includes casing (2) and casing (3) down, its characterized in that: an input shaft assembly (6) is rotatably arranged in the upper shell (2), a steering motor (4) for driving the input shaft assembly (6) to rotate is arranged on one side edge of the upper shell (2), and a torsion bar (7) is inserted and installed in the input shaft assembly (6);

the steering gear is characterized in that a group of screw rods (5) are rotatably arranged in the lower shell (3), the outer edges of the screw rods (5) are inserted into the inner edge of the second bearing (10), the upper shell (2) and the lower shell (3) are fixed through a plurality of groups of bolts, a group of matching shafts (8) are arranged between the upper shell (2) and the lower shell (3), the matching shafts (8) are arranged between the torsion bars (7) and the screw rods (5), and the upper shell (2), the lower shell (3) and the matching shafts (8) are fixed and then combined to form a group of steering gear bodies (1).

2. The internal and external spline coupling structure applied to the recirculating ball steering gear according to claim 1, wherein: the top of the matching shaft (8) is provided with a group of long circular limiting cavities, the bottom of the torsion bar (7) is integrally provided with a group of limiting pins (71), the limiting pins (71) are inserted into the limiting grooves (81), the bottom of the matching shaft (8) is integrally provided with a group of external spline shafts (82), and the top of the screw rod (5) is provided with an internal spline groove (11) for the insertion of the external spline shafts (82).

3. The internal and external spline coupling structure applied to the recirculating ball steering gear according to claim 2, wherein: a plurality of groups of clamping teeth are arranged on the outer edge of the outer spline shaft (82), a plurality of groups of matching teeth for clamping the clamping teeth are arranged on the inner edge of the inner spline groove (11), and the small-diameter centering tooth surface between the outer spline shaft (82) and the inner spline groove (11) is in interference fit.

4. The internal and external spline coupling structure applied to the recirculating ball steering gear according to claim 1, wherein: the inner part of the upper shell (2) close to the bottom is embedded with a first bearing (9), the outer side edge of the input shaft assembly (6) is inserted into the inner edge of the first bearing (9), a second bearing (10) is rotatably arranged between the lower shells (3) close to the top, and the outer edge of the screw rod (5) is inserted into the inner edge of the second bearing (10).

5. The internal and external spline coupling structure applied to the recirculating ball steering gear according to claim 1, wherein: during assembly, the input shaft assembly (6), the torsion bar (7) and the matching shaft (8) are combined to form a matched drill structure, and the matching shaft (8) is connected with the screw rod (5) through an internal spline and an external spline.

Technical Field

The invention belongs to the technical field of automobile steering, and particularly relates to an internal and external spline connecting structure applied to a recirculating ball steering gear.

Background

At present, the electromechanical circulating ball has become a necessary requirement on the development road of novel commercial vehicles, and can not be effectively completed in an assembly mode of drilling and assembling components. And the mode of circulation ball lower shell sub-assembly drilling is because the sub-assembly occupation space is great when carrying out the combined assembly of sensor and turbine worm transmission pair in later stage, and the centre is transported the difficulty, and is higher to the assembly workstation requirement, hardly realizes the assembly production line of big batch, integrated form. And the offline assembly is difficult to form a uniform assembly standard, and a quick quality detection reaction mechanism for a product assembly cannot be formed.

Therefore, a new coupling structure and a new coupling mode are needed to be developed, which are the problems that the electromechanical circulating ball is urgently needed to be solved for realizing the industrial production.

Disclosure of Invention

The invention aims to provide an internal and external spline coupling structure applied to a recirculating ball steering gear, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an internal and external spline connecting structure applied to a recirculating ball steering gear comprises an upper shell and a lower shell, wherein an input shaft assembly is rotatably arranged in the upper shell, a steering motor for driving the input shaft assembly to rotate is arranged on one side edge of the upper shell, and a torsion bar is inserted and installed in the input shaft assembly;

the steering gear comprises a lower shell, a torsion bar, a lower bearing, a plurality of bolts, a set of screw rods, a set of matching shafts, a set of steering gear bodies and a set of steering gear bodies, wherein the lower shell is internally and rotatably provided with the set of screw rods, the outer edges of the screw rods are inserted into the inner edge of the second bearing, the upper shell and the lower shell are fixed through the plurality of sets of bolts, the upper shell and the lower shell are provided with the set of matching shafts, the matching shafts are arranged between the torsion bar and the screw rods.

Preferably, a set of long circular limiting cavities is formed in the top of the matching shaft, a set of limiting pins is integrally formed at the bottom of the torsion bar and is inserted into the limiting grooves, a set of external spline shafts is integrally formed at the bottom of the matching shaft, and internal spline grooves for inserting the external spline shafts are formed in the top of the screw.

Preferably, the outer edge of the outer spline shaft is provided with a plurality of groups of clamping teeth, the inner edge of the inner spline groove is provided with a plurality of groups of matching teeth for clamping the clamping teeth, and the small-diameter centering tooth surface between the outer spline shaft and the inner spline groove is in interference fit.

Preferably, a first bearing is embedded and installed in the upper shell close to the bottom, the outer side edge of the input shaft assembly is installed on the inner edge of the first bearing in an inserted mode, a second bearing is rotatably arranged between the lower shells close to the top, and the outer edge of the screw rod is inserted and installed on the inner edge of the second bearing.

Preferably, during assembly, the input shaft assembly, the torsion bar and the matching shaft are combined to form a matched drill structure, and the matching shaft and the screw rod are connected through an internal spline and an external spline.

The invention has the technical effects and advantages that: this be applied to inside and outside spline connection structure of recirculating ball steering gear, through increase a set of combination axle between the last casing of steering gear and lower casing, will join in marriage and bore separately with the screw rod, join in marriage the axle and accomplish with the input shaft subassembly, the torsion bar and join in marriage the brill, the screw rod piece separates with the torsion bar and carries out the independent assembly of subassembly, and then make things convenient for the combination assembly to sensor and turbine worm transmission pair etc. simultaneously, effectively the hookup is in the same place through the mode of interior external splines between the cooperation section of thick bamboo transition piece between last casing subassembly and the lower casing, the maneuverability that can realize components of a whole that can function independently while multicomponent production can effectively promote assembly process. This be applied to inside and outside spline connection structure of recirculating ball steering gear, reasonable in design uses transition hookup as inside and outside spline fit's mode to be applied to the recirculating ball steering gear, replaces traditional match and bores the structure, can improve the assembly process performance of recirculating ball steering gear well, is fit for using widely.

Drawings

FIG. 1 is a front view of the knot of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a cross-sectional view of a conventional recirculating ball redirector of the present invention;

FIG. 4 is a cross-sectional view of the improved recirculating ball diverter of the present invention;

FIG. 5 is a disassembled cross-sectional view of the improved recirculating ball redirector of the present invention;

FIG. 6 is a schematic structural view of a torsion bar and mating shaft of the present invention;

FIG. 7 is a cross-sectional view of the screw and mating shaft of the present invention after an interference fit;

fig. 8 is an enlarged view of the invention at a in fig. 7.

In the figure: the steering gear comprises a steering gear body 1, an upper shell 2, a lower shell 3, a steering motor 4, a screw rod 5, an input shaft assembly 6, a torsion bar 7, a limit pin 71, a matching shaft 8, a limit groove 81, an external spline shaft 82, a first bearing 9, a second bearing 10 and an internal spline groove 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides an internal and external spline connecting structure applied to a recirculating ball steering gear, which comprises an upper shell 2 and a lower shell 3, wherein an input shaft assembly 6 is rotatably arranged in the upper shell 2, a steering motor 4 for driving the input shaft assembly 6 to rotate is arranged on one side edge of the upper shell 2, and a torsion bar 7 is inserted and installed in the input shaft assembly 6;

the steering gear comprises a lower shell 3, a set of screw rods 5 are rotatably arranged in the lower shell 3, the outer edges of the screw rods 5 are inserted into the inner edge of a second bearing 10, the upper shell 2 and the lower shell 3 are fixed through a plurality of sets of bolts, other structures such as a reversing rocker arm shaft and the like are arranged in the lower shell 3, the steering gear is the prior art, specific description is omitted in the application document, a set of matching shafts 8 are arranged between the upper shell 2 and the lower shell 3, the matching shafts 8 are arranged between a torsion bar 7 and the screw rods 5, and the upper shell 2, the lower shell 3 and the matching shafts 8 are fixed and then combined to form a set of steering gear bodies 1.

Specifically, a set of oblong limiting cavities is formed in the top of the matching shaft 8, a set of limiting pins 71 is integrally formed at the bottom of the torsion bar 7, the limiting pins 71 are inserted into the limiting grooves 81, a set of external spline shafts 82 is integrally formed at the bottom of the matching shaft 8, and an internal spline groove 11 for inserting the external spline shafts 82 is formed in the top of the screw 5.

Specifically, a plurality of groups of clamping teeth are arranged on the outer edge of the outer spline shaft 82, a plurality of groups of matching teeth for clamping the clamping teeth are arranged on the inner edge of the inner spline groove 11, and the small-diameter centering tooth surface of the outer spline shaft 82 is in interference fit with the inner spline groove 11.

Specifically, a first bearing 9 is embedded and installed at a position close to the bottom inside the upper shell 2, an inner edge of the first bearing 9 is installed on an outer side edge of the input shaft assembly 6 in an inserted mode, a second bearing 10 is rotatably arranged between the lower shells 3 and close to the top, an outer edge of the screw rod 5 is inserted and installed at an inner edge of the second bearing 10, and the first bearing 9 and the second bearing 10 can play roles in supporting, limiting and the like.

Specifically, during assembly, the input shaft assembly 6, the torsion bar 7 and the matching shaft 8 are combined to form a matched drill structure, and the matching shaft 8 is connected with the screw rod 5 through an internal spline and an external spline.

Specifically, this be applied to inside and outside spline connection structure of recirculating ball steering gear, during the assembly, at first assemble different part sensors and turbine worm transmission pair etc. of upper casing 2 and lower casing 3, when each part of upper casing 2 and lower casing 3 all assembled, freeze the mating shaft 8 through the liquid nitrogen, after freezing, cooperate the grafting with the internal spline groove 44 on screw rod 5 with the external spline shaft 82 on the mating shaft 8, and then make the external spline shaft 82 and the internal spline groove 11 interference fit connection on the screw rod 5, make spacer pin 71 peg graft in spacing groove 81 simultaneously, and fix upper casing 2 and lower casing 3 through the bolt, and then to the equipment of steering gear body 1. This be applied to inside and outside spline connection structure of recirculating ball steering gear, reasonable in design uses transition hookup as inside and outside spline fit's mode to be applied to the recirculating ball steering gear, replaces traditional match and bores the structure, can improve the assembly process performance of recirculating ball steering gear well, is fit for using widely.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.