CN211663327U

CN211663327U - Supporting seat assembly and power steering device with same

Info

Publication number: CN211663327U
Application number: CN201922155722.5U
Authority: CN
Inventors: 秦新云; 师希挺; 蒋光宗; 朱建新; 施桂强
Original assignee: Kuntye Vehicle System Changzhou Co Ltd
Current assignee: Kuntai Vehicle System Changzhou Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-10-13
Anticipated expiration: 2029-12-05

Abstract

The utility model discloses a supporting seat assembly and a power steering device with the same, which comprises a supporting seat body and an annular groove arranged on the supporting seat body, wherein a spring piece is clamped in the annular groove, at least part of the spring piece extends outwards to form a circumferential surface of the annular groove, and the spring piece extending out of the annular groove can deform under stress; the supporting seat body is further provided with a buckle used for locking the spring piece in the annular groove. The beneficial effects of the utility model are mainly embodied in that: novel structure, design benefit, the spring leaf in this assembly has replaced driven O type circle, has compensatied the easy ageing shortcoming of O type circle for a long time, guarantees supporting seat assembly positioning accuracy, satisfies the undulant requirement of power assisted steering device moment.

Description

Supporting seat assembly and power steering device with same

Technical Field

The utility model relates to an electronic power assisted steering tubular column field of car particularly, especially relates to a supporting seat assembly and have power assisted steering device of this assembly.

Background

With the development of the technology, the attention degree of customers to the oil consumption of the whole vehicle is higher and higher, and a pipe column type electric power steering system, namely an electric power steering pipe column, gradually becomes the standard matching of small and medium-sized passenger vehicles. The electric power-assisted steering column drives the worm and gear speed reducing mechanism through the power-assisted motor so as to provide power assistance for the steering column.

The supporting seat assembly is mainly used for connecting and fixing the bearing, and supporting and positioning the bearing and the shell to ensure the coaxiality of the upper shaft and the lower shaft. At present, among the prior art, the supporting seat is the injection molding, and for guaranteeing the cooperation with the casing, the precision to the precision of supporting seat, the machine of casing add the precision and all require than higher, and the supporting seat groove ring has O type circle, guarantees the clearance compensation after cooperating with the casing, and O type circle (rubber spare) is easy ageing, easily leads to the positioning deviation of supporting seat to it is undulant big to cause the worm gear meshing, causes the moment of assembly to be on the large side, thereby influences driver's operation and feels.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art existence, provide a supporting seat assembly and have power assisted steering device of this assembly.

The purpose of the utility model is realized through the following technical scheme:

a supporting seat assembly comprises a supporting seat body and an annular groove formed in the supporting seat body, wherein a spring piece is clamped in the annular groove and is of an open type and comprises a pressing end part and clamping end parts located right below two ends of the pressing end part, at least part of the pressing end part extends outwards to form a circumferential surface formed by the annular groove, and the pressing end part extending out of the annular groove can deform under stress; the supporting seat body is further provided with a buckle used for locking the spring piece in the annular groove, the buckle comprises a fixed plate and a reverse buckle support lug fixedly arranged on the fixed plate, the bottom surface of the reverse buckle support lug penetrates through any buckle groove formed in two ends of the through hole and is tightly pressed on the surface of the clamping end part, and an acting force facing the axis of the supporting seat body is applied to the clamping end part.

Preferably, the pressing end part is parallel to the clamping end part, and the pressing end part and the clamping end part are connected through a connecting end part; the length of the accommodating cavity of the annular groove is equal to or greater than the maximum distance between the clamping end parts, and the length of the through opening of the annular groove is equal to the distance between the connecting end parts.

Preferably, the reverse buckle support lug is further provided with a notch, the height of the notch is equal to the distance between the accommodating cavity and the outer circumferential surface of the support seat body, and the distance between adjacent notches is equal to the length of the buckle groove.

Preferably, at least one convex column is fixedly arranged on the upper surface of the pressing end part, and the convex column is in a semi-cylindrical shape.

Preferably, the pressing end part is connected with the connecting end part, and a chamfer is arranged at the joint of the pressing end part and the connecting end part; the connecting end part is connected with the clamping end part, and a chamfer is arranged at the connecting part of the connecting end part and the clamping end part.

Preferably, a group of fan-shaped grooves are uniformly distributed on the supporting seat body, and an included angle formed between the first edge of each adjacent groove and the circle center of the supporting seat body is 40 degrees.

Preferably, a through hole is formed in the supporting seat body, the circle center of the through hole is concentric with the circle center of the supporting seat body, and a four-point contact ball bearing in interference fit with the supporting seat body is arranged on the through hole.

The utility model also discloses a power steering device with the supporting seat assembly, which comprises a shell assembly, a worm assembly and a lower power-assisted shaft worm gear assembly, wherein the worm assembly and the lower power-assisted shaft worm gear assembly are arranged in the shell assembly and are in worm and gear transmission; the lower power-assisted shaft worm gear assembly is press-fitted on the upper power-assisted shaft assembly to form a power-assisted shaft assembly; still interference pressure is pressed on the worm gear assembly of lower helping hand axle and is equipped with like foretell supporting seat assembly.

Preferably, lower helping hand axle worm wheel assembly is including having the lower helping hand axle of acceping the chamber, the epaxial interference pressure of lower helping hand is joined in marriage and is equipped with the supporting seat assembly with the worm wheel assembly, the supporting seat assembly with between the worm wheel assembly through setting up it is spacing to assist epaxial spacing step down.

Preferably, the upper assisting shaft assembly comprises a torsion bar which is arranged in the accommodating cavity and has spline structures at two ends, and one end of the torsion bar extends into an inner hole of the upper assisting shaft at one end of the lower assisting shaft and is in interference fit with the inner hole; the lower assisting shaft and the upper assisting shaft are connected through a sliding bearing, a sensor is welded on the upper assisting shaft, and the sensor is close to the supporting seat assembly.

Preferably, the worm assembly comprises a worm and an annular groove sleeved at one end of the worm, and an O-shaped ring tightly matched with the worm is sleeved on the annular groove; interference pressure is pressed and is equipped with the four-jaw connector that the hole is spline structure on the other end of worm, four-jaw connector is pressed with the interference pressure and is joined in marriage four point contact ball bearing I on the worm is hugged closely, four point contact ball bearing I is by setting up location step on the worm is fixed a position.

Preferably, the housing assembly comprises a housing body, a worm wheel hole is formed in the housing body, the power-assisted shaft assembly is installed in the housing body along the axis direction of the worm wheel hole, a four-point contact ball bearing II is sleeved on one end of the power-assisted shaft assembly, the four-point contact ball bearing II is in interference fit with the housing body, a clamp spring is tightly clamped and matched on the housing body, and the clamp spring is tightly attached to the four-point contact ball bearing II; the other end of the power-assisted shaft assembly is locked on the shell body through a locking nut; still seted up the worm hole on the casing body, the worm assembly is followed the axis direction in worm hole installs extremely in the casing body, install deep groove ball bearing on the worm assembly, deep groove ball bearing with casing body interference crimping, a locking bolt can with the worm assembly locking is in the casing body.

The beneficial effects of the utility model are mainly embodied in that:

1. the spring piece in the assembly replaces a driven O-shaped ring, so that the defect that the O-shaped ring is easy to age for a long time is overcome, the positioning precision of the supporting seat assembly is ensured, and the torque fluctuation requirement of the power steering device is met.

2. The size and precision requirements of the worm wheel hole in the shell body can be reduced, the process is improved, and the cost of parts is effectively reduced.

3. The requirement on the machining precision of the annular groove is reduced, the machining process is improved, the service life of the cutter is prolonged, and the cost is effectively reduced.

4. The spring piece is clamped in the support seat body by the clamp, so that the spring piece can not fall off in the running and vibrating processes, and the normal work of the spring piece is ensured;

5. the power-assisted steering device has the advantages of novel structure, light weight, low cost, simple and convenient assembly, and capability of avoiding the axial movement of the worm, and has wide market prospect in the popularization of the power-assisted steering device.

Drawings

The technical scheme of the utility model is further explained by combining the attached drawings as follows:

FIG. 1: the utility model is a perspective view of the spring leaf;

FIG. 2: the utility model discloses a perspective view of a buckle;

FIG. 3: the utility model is a three-dimensional view of the support seat body;

FIG. 4: the utility model is a three-dimensional view of the supporting seat assembly;

FIG. 5: the utility model discloses a three-dimensional view of a middle power-assisted shaft assembly;

FIG. 6: the utility model discloses a sectional view of a middle power-assisted shaft assembly;

FIG. 7: the utility model discloses a three-dimensional view of a middle worm assembly;

FIG. 8: the utility model discloses an explosion diagram of a middle shell assembly;

FIG. 9: the utility model discloses well this power assisted steering device's assembly drawing.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not limited to the present invention, and structural, method, or functional changes made by those skilled in the art according to these embodiments are all included in the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 8, the utility model discloses a support seat assembly, but including support seat body 1 and joint spring leaf 2 on the support seat body 1, spring leaf 2 is the opening type, and it includes presses tip 21 and is located press the chucking tip 22 under the tip 21 both ends, press tip 21 and chucking tip 22 parallel, and meet through connecting end 23 between the two. The supporting seat body 1 is provided with an annular groove 11 capable of accommodating the spring piece 2, the length of an accommodating cavity 111 of the annular groove 11 is equal to or greater than the maximum distance between the clamping end portions 22, the length of a through opening 112 of the annular groove 11 is equal to the distance between the connecting end portions 23, at least part of the pressing end portion 21 extends out of a circumferential surface formed by the annular groove 11, the pressing end portion 21 extending out of the annular groove 11 can deform under stress until the pressing end portion is clamped in the shell body 31, and the spring piece resets. The novel structure and the ingenious design replace the O-shaped ring for transmission by the spring piece in the assembly, the defect that the O-shaped ring is easy to age for a long time is overcome, the positioning precision of the supporting seat assembly is guaranteed, and the torque fluctuation requirement of the power steering device is met. In addition, the design can reduce the requirements on the size and the precision of the worm wheel hole in the shell body, improve the process and effectively reduce the cost of parts. Meanwhile, the requirement on the machining precision of the annular groove is reduced, the machining process is improved, the service life of the cutter is prolonged, and the cost is effectively reduced.

Furthermore, two convex columns 211 arranged in parallel are fixedly arranged on the upper surface of the pressing end portion 21, and the convex columns 211 are semi-cylindrical. The convex column 211 is arranged to enable the spring piece to be completely attached to the shell body 31, so that the supporting seat assembly is accurately positioned, and meanwhile, the semicircular design is convenient to install, maintain and replace.

In this embodiment, the pressing end portion 21 and the connecting end portion 23 are connected, and a chamfer is provided at the connection portion of the pressing end portion 21 and the connecting end portion 23. The connecting end part 23 is connected with the clamping end part 22, and a chamfer is arranged at the joint of the connecting end part 23 and the clamping end part 22. The chamfer angle can reduce stress concentration and strengthen the strength of the spring piece. Meanwhile, the installation guide function can be achieved, and the installation efficiency is greatly improved.

In the above, a group of fan-shaped grooves 12 is uniformly distributed on the support seat body 1, and an included angle formed between the first edge 121 of each adjacent groove 12 and the circle center of the support seat body 1 is 30 °. The design of the groove 12 can reduce the whole weight, accord with the design idea of light weight, and save raw materials at the same time. This design also possesses the effect of strengthening rib simultaneously, has strengthened this supporting seat body bulk strength. Preferably, a through hole 13 is formed in the support seat body 1, the center of the through hole 13 is concentric with the center of the support seat body 1, and a four-point contact ball bearing iii 14 in interference fit with the support seat body 1 is arranged on the through hole 13. The four-point contact ball bearing is preferably used, because the axial play is smaller and the limit rotational speed is extremely high when the radial play is the same as that of other ball bearings, and therefore, the four-point contact ball bearing is suitable for the occasion of high-speed operation.

The utility model discloses an another design point lies in: the supporting seat body 1 is further provided with a buckle 9 used for locking the spring piece 2 in the annular groove 11. The buckle 9 comprises a fixing plate 91 and a reverse buckle support lug 92 fixedly arranged on the fixing plate 91, wherein the bottom end of the reverse buckle support lug 92 penetrates through any buckle groove 93 formed in two ends of the through hole 112 and is tightly pressed on the clamping end part 22, and an acting force facing the axis of the supporting seat body 1 is applied to the clamping end part 22 so as to lock the spring piece 2 on the supporting seat body, prevent the spring piece from falling off in the operation and vibration processes and ensure the normal operation of the spring piece. Furthermore, a gap 94 is further formed in the inverted buckle support lug 92, and the height of the gap 94 is equal to the distance between the accommodating cavity 111 and the outer circumferential surface of the support seat body 1, so that the buckle 9 can be tightly clamped in the buckle groove 93 by the design, and the influence on the pressing effect of the spring piece due to the vertical movement of the buckle can be avoided. The distance between the adjacent notches 94 is equal to the length of the buckle groove 93, so that the situation that the buckle 9 shakes left and right in the buckle groove 93 is avoided, and the pressing effect is improved.

The utility model also discloses a power assisted steering device with supporting seat assembly, be in including casing assembly 3 and setting worm assembly 4 and lower helping hand axle worm wheel assembly 5 in the casing assembly 3, worm assembly 4 and lower helping hand axle worm wheel assembly 5 are the worm gear transmission. And the lower power-assisted shaft worm gear assembly 5 is press-fitted on the upper power-assisted shaft assembly 6 to form a power-assisted shaft assembly. Still interference fit is gone up to helping hand axle worm gear assembly 5 down and is had as above the supporting seat assembly, above-mentioned the device novel structure, light in weight, with low costs, the assembly is simple and convenient, avoided the axial motion of worm, has extensive market prospect in power assisted steering device's popularization.

In the foregoing, lower helping hand axle worm gear assembly 5 is including having the lower helping hand axle 52 of accepting chamber 51, the interference press fit is gone up to lower helping hand axle 52 the supporting seat assembly with worm gear assembly 53, the supporting seat assembly with between the worm gear assembly 53 through setting up spacing step 54 on lower helping hand axle 52 is spacing.

The upper assisting shaft assembly 6 comprises a torsion bar 61 which is arranged in the accommodating cavity 51 and has spline structures at two ends, and one end of the torsion bar 61 extends into an inner hole of an upper assisting shaft 62 which is positioned at one end of the lower assisting shaft 52 and is in interference fit with the inner hole. Lower helping hand axle 52 and last helping hand axle 62 between be connected through slide bearing 63, go up still to weld on the helping hand axle 62 and have sensor 64, sensor 64 with the supporting seat assembly is pressed close to.

In the above, the worm assembly 4 includes the worm 41 and the annular groove 42 that is sleeved at one end of the worm 41, the annular groove 42 is sleeved with the O-ring 43 that is tightly fitted with the worm 41. Interference press-fit has the hole to be four claw connectors 44 of spline structure on the other end of worm 41, four claw connectors 44 press-fit with the interference four point contact ball bearing I45 on worm 41 hugs closely, four point contact ball bearing I45 is by setting up location step on worm 41 is fixed a position.

The utility model discloses in, casing assembly 3 includes casing body 31, worm wheel hole 32 has been seted up on casing body 31, helping hand axle assembly is followed worm wheel hole 32's axis direction install extremely in casing body 31, one of helping hand axle assembly serves the cover and is equipped with four point contact ball bearing II33, four point contact ball bearing II33 with casing body 31 interference connects and connects, it has a jump ring 34 to go back the tight card cooperation on casing body 31, jump ring 34 with four point contact ball bearing II33 is hugged closely. The other end of the power-assisted shaft assembly is locked on the shell body 31 through a locking nut 35. Still seted up worm hole 36 on the casing body 31, worm assembly 4 is followed worm hole 36's axis direction install extremely in the casing body 31, install deep groove ball bearing 37 on the worm assembly 4, deep groove ball bearing 37 with casing body 31 interference crimping, a locking bolt 38 can with worm assembly 4 locking is in the casing body 31. Preferably, the housing body 31 is further provided with a mounting bushing assembly 39 in an interference press fit manner, and two ends of the mounting bushing assembly 39 are made of rubber elastomers.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. Supporting seat assembly, its characterized in that: the spring piece is characterized by comprising a supporting seat body (1) and an annular groove (11) formed in the supporting seat body (1), wherein a spring piece (2) is clamped in the annular groove (11), the spring piece (2) is open and comprises a pressing end part (21) and clamping end parts (22) positioned right below two ends of the pressing end part (21), at least part of the pressing end part (21) extends outwards to form a circumferential surface formed by the annular groove (11), and the pressing end part (21) extending out of the annular groove (11) can deform under stress; still offer on supporting seat body (1) and be used for with spring leaf (2) locking is in buckle (9) in annular fluting (11), buckle (9) are including fixed plate (91) and set firmly back-off journal stirrup (92) on fixed plate (91), bottom surface (921) of back-off journal stirrup (92) run through and set up arbitrary buckle groove (93) at run-through mouth (112) both ends, tightly press in the surface of chucking tip (22), apply one to chucking tip (22) towards the effort of supporting seat body (1) axle center.

2. The support mount assembly of claim 1 wherein: the pressing end part (21) is parallel to the clamping end part (22), and the pressing end part and the clamping end part are connected through a connecting end part (23); the length of the accommodating cavity (111) of the annular groove (11) is equal to or larger than the maximum distance between the clamping end parts (22), and the length of the penetrating opening (112) of the annular groove (11) is equal to the distance between the connecting end parts (23).

3. The support mount assembly of claim 2 wherein: the reverse buckle support lug (92) is further provided with a notch (94), the height of the notch (94) is equal to the distance between the accommodating cavity (111) and the outer circumferential surface of the support seat body (1), and the distance between adjacent notches (94) is equal to the length of the buckle groove (93).

4. The support mount assembly of claim 2 wherein: at least one convex column (211) is fixedly arranged on the upper surface of the pressing end part (21), and the convex column (211) is in a semi-cylindrical shape.

5. The support mount assembly of claim 2 wherein: the pressing end part (21) is connected with the connecting end part (23), and a chamfer is arranged at the connection part of the pressing end part (21) and the connecting end part (23); the connecting end part (23) is connected with the clamping end part (22), and a chamfer is arranged at the joint of the connecting end part (23) and the clamping end part (22).

6. The support mount assembly of claim 2 wherein: a group of fan-shaped grooves (12) are uniformly distributed on the supporting seat body (1), and an included angle formed between a first edge (121) of each adjacent groove (12) and the circle center of the supporting seat body (1) is 30 degrees.

7. The support mount assembly of claim 2 wherein: a through hole (13) is formed in the supporting seat body (1), the circle center of the through hole (13) is concentric with the circle center of the supporting seat body (1), and a four-point contact ball bearing III (14) in interference fit with the supporting seat body (1) is arranged on the through hole (13).

8. Power assisted steering device with supporting seat assembly, its characterized in that: the worm gear type worm gear comprises a shell assembly (3), and a worm assembly (4) and a lower boosting shaft worm gear assembly (5) which are arranged in the shell assembly (3), wherein the worm assembly (4) and the lower boosting shaft worm gear assembly (5) are in worm gear transmission; the lower power-assisted shaft worm gear assembly (5) is press-fitted on the upper power-assisted shaft assembly (6) to form a power-assisted shaft assembly; the lower boosting shaft worm gear assembly (5) is also provided with the support seat assembly as claimed in any one of claims 1 to 7 in an interference press fit mode.

9. A power steering apparatus having a support base assembly according to claim 8, wherein: lower helping hand axle worm wheel assembly (5) are including having lower helping hand axle (52) of acceping chamber (51), interference press fit has on lower helping hand axle (52) the supporting seat assembly with worm wheel assembly (53), the supporting seat assembly with through setting up between worm wheel assembly (53) spacing through spacing step (54) on lower helping hand axle (52) are spacing.

10. A power steering apparatus having a support base assembly according to claim 9, wherein: the upper boosting shaft assembly (6) comprises a torsion bar (61) which is arranged in the accommodating cavity (51) and has spline structures at two ends, and one end of the torsion bar (61) extends into an inner hole of an upper boosting shaft (62) at one end of the lower boosting shaft (52) and is in interference fit with the inner hole; lower helping hand axle (52) and go up and connect through slide bearing (63) between helping hand axle (62), it has sensor (64) still to weld on helping hand axle (62), sensor (64) with the supporting seat assembly is pressed close to.

11. A power steering apparatus having a support base assembly according to claim 10, wherein: the worm assembly (4) comprises a worm (41) and an annular groove (42) sleeved at one end of the worm (41), wherein an O-shaped ring (43) tightly matched with the worm (41) is sleeved on the annular groove (42); interference pressure is pressed and is equipped with hole four-jaw connector (44) for spline structure on the other end of worm (41), four-jaw connector (44) press with the interference pressure and are joined in marriage four point contact ball bearing I (45) on worm (41) and hug closely, four point contact ball bearing I (45) are by setting up location step on worm (41) is fixed a position.

12. A power steering apparatus having a support base assembly according to claim 11, wherein: the shell assembly (3) comprises a shell body (31), a worm wheel hole (32) is formed in the shell body (31), the boosting shaft assembly is installed in the shell body (31) along the axis direction of the worm wheel hole (32), a four-point contact ball bearing II (33) is sleeved at one end of the boosting shaft assembly, the four-point contact ball bearing II (33) is in interference fit with the shell body (31), a clamp spring (34) is tightly clamped and matched on the shell body (31), and the clamp spring (34) is tightly attached to the four-point contact ball bearing II (33); the other end of the power-assisted shaft assembly is locked on the shell body (31) through a locking nut (35); still seted up worm hole (36) on casing body (31), worm assembly (4) are followed the axis direction in worm hole (36) is installed extremely in casing body (31), install deep groove ball bearing (37) on worm assembly (4), deep groove ball bearing (37) with casing body (31) interference crimping, a lock bolt (38) can with worm assembly (4) locking is in casing body (31).