阅读说明：本技术 一种非循环式汽车动力转向器及汽车 (Non-circulation type automobile power steering gear and automobile ) 是由 陈锋 胡斐 张兴琦 陈善友 斯梦悦 于 2020-11-16 设计创作，主要内容包括：本发明涉及转向助力器领域,公开了一种非循环式汽车动力转向器,包括壳体(100),壳体(100)内安装有螺杆(101)、螺杆(101)上装配有传动螺母(102),螺杆(101)的外侧面上沿其轴线方向延伸设置有螺旋状的第一轨道槽(103),传动螺母(102)中部贯通的安装通道内壁沿通道轴线设置有螺旋状的第二轨道槽(104),第一轨道槽(103)和第二轨道槽(104)对应拼接成螺旋形传动轨道(105),传动轨道(105)内设置有调节弹簧(106)和传动滚珠组(107),调节弹簧(106)和传动滚珠组(107)沿传动轨道(105)的轨迹布置,调节弹簧(106)和传动滚珠组(107)相间分布。该种转向器具有结构简单,噪音小、实用寿命长传动稳定的优点。(The invention relates to the field of steering boosters, and discloses a non-circulating automobile power steering device which comprises a shell (100), wherein a screw (101) is installed in the shell (100), a transmission nut (102) is installed on the screw (101), a spiral first track groove (103) is formed in the outer side surface of the screw (101) in an extending mode along the axis direction of the screw, a spiral second track groove (104) is formed in the inner wall of an installation channel penetrating through the middle of the transmission nut (102) along the axis of the channel, the first track groove (103) and the second track groove (104) are correspondingly spliced into a spiral transmission track (105), an adjusting spring (106) and a transmission ball group (107) are arranged in the transmission track (105), the adjusting spring (106) and the transmission ball group (107) are arranged along the track of the transmission track (105), and the adjusting spring (106) and the transmission ball group (107) are distributed at intervals. The steering gear has the advantages of simple structure, low noise, long service life and stable transmission.)

1. The utility model provides a non-circulation formula car power steering ware, includes casing (100), installs screw rod (101) in casing (100), is equipped with drive nut (102) on screw rod (101), its characterized in that: a spiral first track groove (103) is formed in the outer side face of the screw (101) in an extending mode along the axis direction of the screw, a spiral second track groove (104) is formed in the inner wall of an installation channel penetrating through the middle of the transmission nut (102) along the axis of the channel, the first track groove (103) and the second track groove (104) are correspondingly spliced into a spiral transmission track (105), an adjusting spring (106) and a transmission ball group (107) are arranged in the transmission track (105), the adjusting spring (106) and the transmission ball group (107) are arranged along the track of the transmission track (105), and the adjusting spring (106) and the transmission ball group (107) are distributed at intervals.

2. The non-circulating automotive power steering gear according to claim 1, characterized in that: adjusting springs (106) are arranged at two ends of the transmission track (105), the adjusting springs (106) at the two ends are defined as limiting springs (108), end portions of the two limiting springs (108) are abutted to end faces at two ends of the second track groove (104), and the other ends of the two limiting springs (108) are abutted to the transmission ball group (107).

3. The non-circulating automotive power steering gear according to claim 1, characterized in that: the transmission ball group (107) is composed of a plurality of balls, and two ends of each transmission ball group (107) are limited by adjusting springs (106) located on two sides of the transmission ball group (107).

4. The non-circulating automotive power steering gear according to claim, characterized in that: the outer side of the transmission nut (102) is provided with a rack (109), a steering gear claw (110) and a steering shaft (111) are further arranged in the shell (100), the steering gear claw (110) is fixedly connected with the steering shaft (111), the steering gear claw (110) is meshed with the rack (109), the transmission nut (102) moves axially to drive the steering gear claw (110) to rotate, and the steering gear claw (110) drives the steering shaft (111) to rotate coaxially.

5. The non-circulating automotive power steering gear according to claim 1, characterized in that: in the initial state, the regulating spring (106) is in a compressed state.

6. The non-circulating automotive power steering gear according to claim 1, characterized in that: a gap exists between one end of at least one group of transmission ball group (107) and the adjusting spring (106).

7. The non-circulating automotive power steering gear according to claim 1, characterized in that: the edges of the openings at the two ends of the mounting channel are provided with notches (113), and the notches (113) are communicated with the transmission track (105).

8. The non-circulating automotive power steering gear according to claim 1, characterized in that: the notch (113) is a wedge-shaped notch (115), and the bottom surface of the notch (113) is flush with the end surface of the end part of the second rail groove (104).

9. The non-circulating automotive power steering gear according to claim 1, characterized in that: the inner wall of the first track groove (103) is an arc-shaped surface (112), the inner wall of the second track groove (104) is an arc-shaped surface (112), and the cross section of the transmission track (105) is approximately circular.

10. An automobile, characterized in that: a non-circulating automotive power steering gear equipped with a non-circulating automotive power steering gear according to any one of claims 1 to 7.

Technical Field

The invention relates to the field of automobile steering boosters, in particular to a non-circulating automobile power steering gear.

Background

With the widespread use of electric power steering apparatuses in commercial vehicles, a steering gear has gained attention as one of the core units. The traditional steering gear mostly adopts a cannula type circulating ball structure and comprises a screw rod, a nut, a cannula reverser, a steering gear shell and a circulating ball. The screw, the threaded sleeve and the cannula reverser form a circulating track, and the steel ball is circularly driven in the circulating track. However, the structure is complex, occupies more space, is easy to damage, and is difficult to meet the actual requirement.

Chinese patent CN210364029U provides a recirculating ball conduit and a recirculating ball type electric power steering apparatus for an automobile, which realizes the circulation of balls through an external recirculating ball conduit, but the structure is complex, occupies a large space and is easily damaged, and secondly, because the balls in the whole recirculating ball track cannot be completely filled, when the steering machine works, the balls collide and shake, and the noise is large; no adjusting device is arranged between the recirculating balls, so that the problems of ball accumulation, extrusion and the like can occur during working, grinding is caused, and the continuity of transmission and the service life of a product are influenced.

Disclosure of Invention

The invention aims at the problems that the ball can collide and shake in the prior art, and the noise is high; no adjusting device is arranged between the recirculating balls, the problems of ball accumulation, extrusion and the like can occur during working, and further the technical problems that grinding is generated, the continuity of transmission is influenced, the service life of a product is prolonged and the like are caused, and the non-circulating automobile power steering gear and the automobile are provided.

In order to solve the technical problem, the invention is solved by the following technical scheme:

the utility model provides a non-circulation formula automobile power steering ware, which comprises a housin, install the screw rod in the casing, be equipped with drive nut on the screw rod, it is provided with spiral helicine first track groove to extend along its axis direction on the lateral surface of screw rod, the installation passageway inner wall that drive nut middle part link up is provided with spiral helicine second track groove along the passageway axis, first track groove and second track groove correspond the concatenation and are the roughly circular shape spiral transmission track in cross-section, be provided with adjusting spring and transmission ball group in the transmission track, adjusting spring and transmission ball group set up along the orbital orbit setting of transmission, adjusting spring and transmission ball group alternate distribution.

Preferably, adjusting springs are arranged at two ends of the transmission track, the adjusting springs at the two ends are defined as limiting springs, end portions of the two limiting springs are abutted against end faces at two ends of the second track groove, and the other ends of the two limiting springs are abutted against the transmission ball.

Preferably, the transmission ball group consists of a plurality of balls, and both ends of each transmission ball group are limited by adjusting springs positioned at both sides of the transmission ball group.

Preferably, a rack is arranged on the outer side of the transmission nut, a steering gear claw and a steering shaft are further arranged in the shell, the steering gear claw is fixedly connected with the steering shaft and meshed with the rack, the transmission nut moves axially to drive the steering gear claw to rotate, and the steering gear claw drives the steering shaft to rotate coaxially.

Preferably, in the initial state, the adjustment spring is in a compressed state.

Preferably, there is a gap between one end of at least one of the sets of drive balls and the adjustment spring.

Preferably, the edges of the openings at the two ends of the mounting channel are provided with notches, and the notches are communicated with the transmission track.

Preferably, the notch is a wedge-shaped notch, and a bottom surface of the notch is flush with a bottom surface of the second rail groove.

The invention also provides an automobile which is provided with the non-circulating automobile power steering gear.

The automobile power steering gear designed by the invention is creatively provided with the spring structure, and meanwhile, the balls are arranged in groups, so that the problem of accumulation and extrusion of the balls is avoided, the acting force between the springs is adjusted to be coordinated with each other, the problem of accumulation and overstock of the balls in the rolling process is avoided, the transmission stability and the service life of the product are improved, and the problem of noise caused by free running and shaking of the balls on the track due to the traditional ball track structure is avoided.

Drawings

Fig. 1 is a schematic view of the overall structure of the device.

Fig. 2 is a schematic view of the assembly of the screw, the drive nut, the dog and the steering shaft.

Fig. 3 is a schematic cross-sectional structure of fig. 2.

Fig. 4 is a schematic view of the assembly of the screw with the adjustment spring and the drive ball set.

Fig. 5 is a schematic view of the assembly of the drive nut with the adjustment spring and the drive ball set.

The names of the parts indicated by the numerical references in the drawings are as follows: 100-shell, 101-screw rod, 102-drive nut, 103-first track groove, 104-second track groove, 105-drive track, 106-adjusting spring, 107-drive ball group, 108-limiting spring, 109-rack, 110-tooth claw, 111-steering shaft, 112-arc surface, 113-notch and 114-limiting surface.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

The technical problem to be solved by the scheme of the invention is to fundamentally prevent the problem of accumulation and extrusion generated in the rolling process of the ball bearings and fundamentally solve the problems of noise generated by free rolling of the ball bearings and abrasion of the ball bearings. Therefore, the present embodiment solves the above problems by the following technical solutions.

A non-circulation type automobile power steering gear comprises a shell 100, a screw 101 is installed in the shell 100, a transmission nut 102 is installed on the screw 101, a spiral first track groove 103 is formed in the outer side face of the screw 101 in an extending mode along the axis direction of the screw, a spiral second track groove 104 is formed in the inner wall of an installation channel, penetrating through the middle of the transmission nut 102, of the channel axis, the first track groove 103 and the second track groove 104 are correspondingly spliced to form a spiral transmission track 105 with a roughly circular cross section, an adjusting spring 106 and a transmission ball group 107 are arranged in the transmission track 105, the adjusting spring 106 and the transmission ball group 107 are arranged along the track of the transmission track 105, and the adjusting spring 106 and the transmission ball group 107 are distributed at intervals. Wherein, both ends of the screw 101 are fixedly connected with the shell 100 through bearing seats, and the transmission nut 102 is matched with the screw 101. The inner wall of the first track groove 103 is an arc surface 112, and the inner wall of the second track groove 104 is an arc surface 112.

In this embodiment, the adjusting springs 106 are disposed at two ends of the transmission rail 105, the adjusting springs 106 at the two ends are defined as limiting springs 108, end portions of the two limiting springs 108 abut against end surfaces at two ends of the second rail groove 104, and the other ends of the two limiting springs 108 abut against the transmission ball. The transmission ball group 107 in this embodiment is located between the limit springs 108 at both ends.

The transmission ball group 107 in this embodiment is composed of a plurality of balls, and both ends of each transmission ball group 107 are limited by the adjusting springs 106 located at both sides of the transmission ball group 107. Therefore, the phenomenon of accumulation and extrusion cannot occur between the balls due to the arrangement of the adjusting spring 106, the adjusting spring 106 plays a role in limiting and buffering the balls, and abrasion between the balls is reduced. In order to form a complete transmission structure, a rack 109 is arranged on the outer side of the transmission nut 102, a steering gear claw 110 and a steering shaft 111 are further arranged in the shell 100, the steering gear claw 110 is fixedly connected with the steering shaft 111, the steering gear claw 110 is meshed with the rack 109, the transmission nut 102 moves axially to drive the steering gear claw 110 to rotate, and the steering gear claw 110 drives the steering shaft 111 to rotate coaxially, so that rotation is realized. In this embodiment, in the initial state, the adjusting spring 106 is in a compressed state, so that the balls are in a fitting state with a pre-tightening force in any state, and the problem of noise caused by free running and shaking of the balls on the rail is avoided. Meanwhile, the structure of the automobile steering gear is simplified. The clearance between the ball and the adjustment spring 106 is zero. So when the transmission, when screw rod 101 drove drive nut 102 motion, the ball rolled along transmission track 105, and moving direction tip steel ball extrusion limit spring moreover, and the limit spring 108 of the other end relaxs, and the spring force reduces to guarantee the stability and the equilibrium of ball rolling forward in-process atress, limit spring 108's setting has guaranteed that the nut can realize effectual working length simultaneously, and this kind of structure is simpler, has avoided the defect that traditional structure needs external installation pipe.

In order to facilitate the installation of the limiting spring 108, notches 113 are formed in the edges of the openings at the two ends of the installation channel, and the notches 113 are communicated with the transmission track 105. The notch 113 is a wedge 115, and the bottom surface of the notch 113 is flush with the bottom surface of the second track groove 104, wherein the end surfaces defining the two ends of the second track groove 104 are limit surfaces 114. This configuration can reduce the exposed area of the spacing spring 108. The maximum diameter of the cross-section of the wedge 115 in this embodiment is greater than the diameter of the ball, which is inserted into the drive track 105 from the wedge 115.

The automobile power steering gear designed by the invention is creatively added with the spring structure, meanwhile, the balls are arranged in groups, the problem of accumulation and extrusion of the balls is avoided, the acting force between the adjusting springs 106 is coordinated with each other, the problem of accumulation and overstock of the balls in the rolling process is avoided, the transmission stability and the service life of the product are improved, and the problem of noise caused by free running and shaking of the balls on the track due to the traditional ball track structure is avoided.

Example 2

This embodiment is different from embodiment 1 in that: there is a gap between one end of at least one set of transmission balls 107 and the adjustment spring 106.

Example 3

The invention also provides an automobile which is provided with the non-circulating automobile power steering gear.

Example 4

The present embodiment is different from embodiment 1 in that the inner walls of the first track groove 103 and the second track groove 104 are non-arc surfaces.

Example 5

In contrast to the examples: the balls in this embodiment are steel balls.