CN212028403U

CN212028403U - Steel plate spring

Info

Publication number: CN212028403U
Application number: CN201922375777.7U
Authority: CN
Inventors: 江小红; 王远青; 熊默根; 张�杰
Original assignee: Jiangxi Yuancheng Automobile Technology Co ltd
Current assignee: Jiangxi Yuancheng Automobile Technology Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-11-27
Anticipated expiration: 2029-12-25

Abstract

The utility model provides a leaf spring, including the last leaf spring, middle leaf spring and the lower leaf spring of range upon range of connection in proper order, still including set up in the tip of middle leaf spring and with go up leaf spring fixed connection's flexible pad, go up the leaf spring middle leaf spring with the leaf spring is middle uniform thickness, toward the variable cross-section structure that both sides thickness reduces gradually down, go up the leaf spring with middle leaf spring is the convex surface orientation the arc structure of leaf spring down, the leaf spring is straight bar structure down, the top surface of flexible pad for the plane and with go up leaf spring fixed connection, the bottom surface of flexible pad is the sphere of evagination and towards leaf spring down. The utility model discloses an adopt the variable cross-section plate spring of multi-disc gradual change rigidity, realized the variable rigidity characteristic, make the empty load of car and full load between the conversion have the benefit of the frequency bias such as, improve the travelling comfort of car, still saved the leaf spring material.

Description

Steel plate spring

Technical Field

The utility model relates to the technical field of automobiles, in particular to leaf spring.

Background

With the continuous improvement of living standard of people, the automobile gradually becomes a necessary vehicle for people to go out and work, in the running process of the automobile, wheels and an axle vibrate up and down, a suspension system on the automobile can play a role in relieving the impact generated when the automobile runs over uneven road surfaces, and an automobile steel plate spring is a main energy absorption element and generally consists of a plurality of plate spring pieces.

Leaf spring is various in the existing market, but mostly all adopts cross-section plate spring such as waiting, and this kind of leaf spring, in the middle of the car use, the conversion between no-load and the full load state is nimble inadequately, and the car is unloaded to go jolt well, and the travelling comfort is relatively poor, and the leaf spring material consumptive material is big.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims at providing a leaf spring to solve the relatively poor technical problem of leaf spring's travelling comfort among the prior art.

According to the utility model discloses leaf spring among the embodiment, including the last leaf spring, middle leaf spring and the lower leaf spring of range upon range of connection in proper order, still including set up in the tip of middle leaf spring and with go up leaf spring fixed connection's flexible pad, go up the leaf spring middle leaf spring with the leaf spring is middle uniform thickness, the variable cross-section structure that reduces gradually toward both sides thickness down, go up the leaf spring with middle leaf spring is the convex surface orientation the arc structure of leaf spring down, the leaf spring is straight bar structure down, the top surface of flexible pad for the plane and with go up leaf spring fixed connection, the bottom surface of flexible pad is the sphere of evagination and towards lower leaf spring.

Furthermore, both ends of the upper plate spring are also provided with a rolling lug, and a composite bushing is fixedly arranged in the rolling lug.

Further, the composite bushing comprises a rigid bushing and an elastic sheath connected between the outer wall of the rigid bushing and the inner wall of the eye.

Furthermore, a plurality of recesses are arranged on the outer wall of the elastic sheath at intervals, and the recesses are annularly arranged on the outer wall of the elastic sheath.

Furthermore, the number of the flexible cushions is two, and two ends of the middle plate spring are respectively provided with one flexible cushion.

Furthermore, the middle part of the flexible pad is also provided with a hollow part, and the hollow part is positioned at one side of the sleeving hole close to the lower plate spring.

Furthermore, the middle part of the flexible pad is provided with a sleeving hole which is sleeved on the end part of the middle plate spring

Furthermore, a limiting structure is arranged between every two adjacent plate springs and comprises a groove and a protrusion which are in matched clamping connection.

Further, the upper plate spring, the middle plate spring, and the lower plate spring are locked and fixed by a center bolt located at a center position of the plate spring.

Furthermore, two limiting structures symmetrically arranged on two sides of the central bolt are arranged between every two adjacent plate springs.

Compared with the prior art: the utility model provides a leaf spring in the middle of this application, through adopting the variable cross-section leaf spring of multi-disc gradual change rigidity, the variable rigidity characteristic has been realized, make the car empty load and full load between the conversion have the benefit of the frequency bias of waiting, the leaf spring material has still been saved, in addition still will be up, the well leaf spring sets up the arc and makes its convex surface towards the lower leaf spring of vertical bar shape, in order to improve buffer height, still set up the flexbile pad at the tip of middle leaf spring simultaneously, in order to reduce the vibration transmission between last leaf spring and the lower leaf spring, and avoid taking place the rigidity friction and produce the noise between last leaf spring and the lower leaf spring, in addition still make flexbile pad and last leaf spring plane contact, and contact with lower leaf spring point, the characteristic of this gradual change rigidity leaf spring has been guaranteed, thereby make the peculiar effect of leaf spring characteristic performance, the life.

Drawings

Fig. 1 is a structural view of a leaf spring in a natural state according to a first embodiment of the present invention;

FIG. 2 is an enlarged view taken at I in FIG. 1;

fig. 3 is a structural diagram of a leaf spring in a buffering state according to a first embodiment of the present invention;

FIG. 4 is an enlarged view taken at II in FIG. 3;

fig. 5 is a side view of a flexible mat according to a first embodiment of the present invention;

FIG. 6 is a cross-sectional view of a composite bushing in a first embodiment of the invention;

fig. 7 is a side view of a flexible mat according to a second embodiment of the present invention.

Description of the main element symbols:

upper plate spring	11	Middle plate spring	12
				Lower plate spring	13	Central bolt	14
Limiting structure	15	Groove	151
				Projection	152	Flexible cushion	16
Suit hole	161	Rolling ear	111
				Composite bushing	17	Rigid bushing	171
Elastic sheath	172	Depressions	1721
				Hollow out	162

The following detailed description of the invention will be further described in conjunction with the above-identified drawings.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 6, a leaf spring according to a first embodiment of the present invention is shown, which includes an upper leaf spring 11, a middle leaf spring 12 and a lower leaf spring 13, which are sequentially stacked, wherein:

the upper plate spring 11, the middle plate spring 12 and the lower plate spring 13 are all variable cross-section structures with the same thickness in the middle and gradually reduced thickness towards two sides, namely, the variable cross-section structures with gradually changed rigidity are formed by keeping the thickness in the middle of the plate springs unchanged and gradually thinning the two ends of the plate springs. In addition, the upper plate spring 11 and the middle plate spring 12 are both arc-shaped structures with convex surfaces facing the lower plate spring 13, and the lower plate spring 13 is of a straight bar structure, so that the distance between the end parts of the upper plate spring, the middle plate spring and the lower plate spring 13 is increased, the buffer height is increased, and the buffer effect is improved.

Specifically, the upper plate spring 11, the middle plate spring 12, and the lower plate spring 13 are fastened and fixed by a center bolt 14, and the center bolt 14 is located at the center position of the plate spring. In order to avoid the fracture of central bolt 14, be equipped with limit structure 15 between two adjacent leaf springs, be provided with limit structure 15 between last leaf spring 11 and middle leaf spring 12 promptly, and middle leaf spring 12 and lower leaf spring 13 between all be provided with limit structure 15, limit structure 15 specifically includes the recess 151 and the arch 152 of pairing joint, this limit structure 15 can prevent to take place the side between the leaf spring and move, can effectively reduce the shearing force that middle bolt 14 received, guarantee that central bolt 14 screws up not hard up, avoid the phenomenon of rupture. Meanwhile, the limiting structure 15 can also realize the lateral positioning between the plate springs, so that the clamp configuration is omitted in the overall design, and the cost is saved. Specifically, two limiting structures 15 symmetrically arranged on two sides of the central bolt 14 are arranged between every two adjacent plate springs.

In addition, leaf spring still including set up in the tip of middle leaf spring 12 and with last leaf spring 11 fixed connection's flexible pad 16, the top surface of flexible pad 16 be the plane and with last leaf spring 11 fixed connection, the bottom surface of flexible pad 16 is the sphere of evagination and face down leaf spring 13, flexible pad 16 adopts the face contact with last leaf spring 11 promptly, flexible pad 16 adopts the point contact with lower leaf spring 13, make flexible pad 16 in the twinkling of an eye with lower leaf spring 13 emergence contact, flexible pad 16 is changeed and is produced deformation, improve the buffering effect, can also reduce the area of contact of flexible pad 16 with lower leaf spring 13 simultaneously, reduce the frictional noise. Specifically, the number of the flexible pads 16 is two, one flexible pad 16 is provided at each end of the middle plate spring 12, and a nesting hole 161 is provided at the middle portion of the flexible pad 16, the nesting hole 161 being nested on the end portion of the middle plate spring 12, thereby fixing the flexible pad 16 to the end portion of the middle plate spring 12. In specific implementation, the flexible pad 16 may be vulcanized rubber vulcanized on the upper plate spring 11 and/or the middle plate spring 12, or the flexible pad 16 may also be ordinary rubber or silica gel, and is fixed on the upper plate spring 11 by means of gluing, screwing, or the like, and the sleeving hole 161 and the middle plate spring 12 may be in interference fit, or the flexible pad 16 and the middle plate spring 12 may be further fixed by means of gluing, screwing, clamping, or the like after being sleeved.

On the other hand, both ends of the upper plate spring 11 are further provided with a rolling lug 111, the rolling lug 111 is internally and fixedly provided with a composite bushing 17, the composite bushing 17 comprises a rigid bushing 171 and an elastic sheath 172 connected between the outer wall of the rigid bushing 171 and the inner wall of the rolling lug 111, the elastic sheath 172 is made of rubber and is formed on the outer wall of the rigid bushing 171 in a vulcanization mode, and the elastic sheath 172 can effectively reduce vibration transmission between the rigid bushing 171 and the rolling lug 111 and improve the buffering effect. In addition, the outer wall of the elastic sheath 172 is provided with a plurality of recesses 1721 which are arranged at intervals, the recesses 1721 are annularly arranged on the outer wall of the elastic sheath 172, and the recesses 1721 can enable the composite bushing 17 to be pressed into the eye-curling hole more easily, and meanwhile, rubber is not easy to be damaged, so that the eye-curling part of the plate spring is not easy to break and the bushing is not easy to lose efficacy in the using process of the plate spring.

To sum up, the utility model discloses leaf spring in the middle of the above-mentioned embodiment, through adopting the variable cross-section leaf spring of multi-disc gradual change rigidity, the variable rigidity characteristic has been realized, make the vehicle empty load and full load between the conversion have the bias frequency benefit such as, the leaf spring material has still been saved, on addition, the medium leaf spring sets to the arc and makes its convex surface towards the lower leaf spring of vertical bar shape, in order to improve buffer height, still set up the flexile pad at the tip of middle leaf spring simultaneously, in order to reduce the vibration transmission between last leaf spring and the lower leaf spring, and avoid taking place rigid friction and producing the noise between last leaf spring and the lower leaf spring, in addition still make flexile pad and last leaf spring plane contact, and contact with lower leaf spring point, this gradual change rigidity leaf spring's characteristic has been guaranteed, thereby make the peculiar effect of leaf spring characteristic performance, the life of leaf spring has been improved, thereby.

Referring to fig. 7, a leaf spring according to a second embodiment of the present invention is shown, the leaf spring in this embodiment is substantially the same as the leaf spring in the first embodiment, except that:

the middle part of the flexible pad 16 is also provided with a hollow 162, and the hollow 162 is positioned at one side of the sleeving hole close to the lower plate spring 13, so that the buffering effect of the flexible pad 16 is further improved. The flexible cushion 16 is preferably vulcanized rubber, which has good toughness and cushioning effect. In some optional embodiments of the present invention, the hollow 162 may be a grid-like hollow or a hole-like hollow.

It should be noted that the device provided by the second embodiment of the present invention, which implements the same principle and produces some technical effects as the first embodiment, can refer to the corresponding contents in the first embodiment for the sake of brief description, where this embodiment is not mentioned.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a leaf spring, including the last leaf spring, middle leaf spring and the lower leaf spring of the connection of range upon range of in proper order, its characterized in that, still including set up in the tip of middle leaf spring and with go up leaf spring fixed connection's flexible pad, go up the leaf spring middle leaf spring with the lower leaf spring is thickness such as centre, the variable cross-section structure that gradually reduces toward both sides thickness, go up the leaf spring with middle leaf spring is the convex surface orientation the arc structure of leaf spring down, the leaf spring is straight bar structure down, the top surface of flexible pad be the plane and with go up leaf spring fixed connection, the bottom surface of flexible pad is the sphere of evagination and towards lower leaf spring.

2. The leaf spring of claim 1, wherein the upper leaf spring is further provided with a lug at each end, and a composite bushing is fixedly arranged in the lug.

3. The leaf spring of claim 2, wherein the composite bushing comprises a rigid bushing and a resilient wrap connected between an outer wall of the rigid bushing and an inner wall of the eye.

4. The leaf spring according to claim 3, wherein the outer wall of the elastic sheath is provided with a plurality of recesses arranged at intervals, and the recesses are arranged on the outer wall of the elastic sheath in a surrounding manner.

5. The leaf spring of claim 1, wherein the number of compliant pads is two, one at each end of the intermediate leaf spring.

6. The leaf spring according to claim 5, wherein the middle portion of the flexible pad is provided with a nesting hole that is nested on the end portion of the middle leaf spring.

7. The leaf spring according to claim 6, wherein the middle portion of the flexible pad is further provided with a hollow, and the hollow is located at one side of the sheathing hole close to the lower leaf spring.

8. The leaf spring according to claim 1, wherein a limiting structure is provided between two adjacent leaf springs, and the limiting structure comprises a groove and a protrusion which are clamped in a matching manner.

9. The leaf spring of claim 8, wherein the upper, middle and lower leaf springs are locked and secured by a center bolt located at a center position of the leaf spring.

10. The leaf spring according to claim 9, wherein two of the position-limiting structures are symmetrically disposed on both sides of the central bolt between each two adjacent leaf springs.