CN218430752U

CN218430752U - Automobile single plate spring connecting structure

Info

Publication number: CN218430752U
Application number: CN202222698234.0U
Authority: CN
Inventors: 盛其军
Original assignee: Dongfeng Commercial Vehicle Co Ltd
Current assignee: Dongfeng Commercial Vehicle Co Ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-02-03
Anticipated expiration: 2032-10-13

Abstract

The application relates to a single plate spring connecting structure of an automobile, and belongs to the technical field of automobile suspensions. Including axle and leaf spring assembly, wherein the leaf spring assembly is equipped with the blind hole including the single leaf spring that is located the axle top at the single leaf spring orientation axle's the face of pushing down, and the face of pushing down of single leaf spring is equipped with the locating pin that is located the blind hole, and the locating pin is in order to fix a position single leaf spring on the axle. The utility model provides an automobile single leaf spring connection structure adopts the blind hole structure at the holding down face of single leaf spring, and it does not have the hole to receive the pulling face promptly at the single leaf spring upper surface promptly, has eliminated and has seted up the centre bore on the single leaf spring, and the cracked problem of stress concentration appears at the centre bore edge. This application test proves that improvement single leaf spring that can be very big is at the cracked risk of centre bore department, and through set up the locating pin in the blind hole, this locating pin is used for fixing a position single leaf spring on the axle. The device has the remarkable advantages of convenience in installation, low manufacturing cost and long service life.

Description

Automobile single plate spring connecting structure

Technical Field

The application relates to the technical field of automotive suspensions, in particular to an automotive single-plate spring connecting structure.

Background

The center hole of the conventional steel plate spring adopts a through hole structure, a center bolt penetrates through the center hole to connect single plates of the steel plate spring, and the steel plate spring and related connecting pieces are installed and positioned through the center bolt and a nut. The steel plate spring is generally connected with the liner on the upper surface of the steel plate spring into a whole through a central bolt.

In the related art, the single plate spring is a plate spring loaded by a plate spring, when a center hole of the single plate spring adopts a through hole structure, stress concentration exists at the edge of the center hole of the upper surface (tensile surface) of the single plate spring, and because the single plate spring adopts a high-strength material (the yield strength and the tensile strength are both higher than those of a conventional plate spring), the single plate spring is more sensitive to stress concentration compared with the conventional plate spring, the center of the upper surface of the single plate spring is frequently broken in the test process, and the risk that the single plate spring is broken from the center hole in the actual use process is higher.

Disclosure of Invention

The embodiment of the application provides a single leaf spring connection structure of an automobile to solve the problem that a single leaf spring is broken from a central hole in the related art.

The embodiment of the application provides a car monolithic leaf spring connection structure, includes:

an axle;

the plate spring assembly comprises a single plate spring located at the top of an axle, a blind hole is formed in the pressing surface of the single plate spring facing the axle, a positioning pin located in the blind hole is arranged on the pressing surface of the single plate spring, and the positioning pin is used for positioning the single plate spring on the axle.

In some embodiments: the thickness of single leaf spring reduces to both ends by the middle part in proper order, the both ends of single leaf spring are equipped with the grasswort, the grasswort copulae is connect with rubber bush, the face of pushing down of single leaf spring is the rectangle plane.

In some embodiments: the top of the axle is provided with a cushion block for supporting the single-leaf spring, the top surface of the cushion block is provided with a positioning hole connected with the positioning pin, the bottom surface of the cushion block is provided with a positioning lug connected with the axle, and the top of the axle is provided with a positioning groove matched with the positioning lug.

In some embodiments: the top of the cushion block is provided with a wedge-shaped cushion plate for adjusting the caster angle of the axle, the wedge-shaped cushion plate is provided with a through hole penetrating into the positioning pin, and the wedge-shaped cushion plate is positioned between the cushion block and the single-leaf spring.

In some embodiments: and a lower gasket is arranged between the wedge-shaped base plate and the single plate spring, and a through hole penetrating into the positioning pin is formed in the lower gasket.

In some embodiments: the top of the single-leaf spring is provided with an upper backing plate, the top of the upper backing plate is provided with a pressing plate, two ends of the pressing plate are respectively provided with an arc-shaped groove, and the pressing plate, the upper backing plate, the single-leaf spring and the cushion block are fixed on the axle through U-shaped bolts in sequence.

In some embodiments: the length of the upper backing plate is larger than that of the pressing plate, and two ends of the upper backing plate are provided with flanges which are turned upwards.

In some embodiments: the top surface of the axle is provided with a mounting hole for connecting the U-shaped bolt, and one end of the U-shaped bolt penetrates into the mounting hole and is fixedly connected with the mounting hole through a nut.

In some embodiments: the upper backing plate is made of a non-metal material with the hardness lower than that of the single plate spring.

In some embodiments: the top of the locating pin is in interference connection with the blind hole of the single plate spring.

The beneficial effect that technical scheme that this application provided brought includes:

the embodiment of the application provides a car monolithic leaf spring connection structure, because the car monolithic leaf spring connection structure of this application has set up axle and leaf spring assembly, wherein the leaf spring assembly is equipped with the blind hole at the face of pushing down of single leaf spring towards the axle including the single leaf spring that is located the axle top, and the face of pushing down of single leaf spring is equipped with the locating pin that is located the blind hole, and the locating pin is in order to fix a position single leaf spring on the axle.

Consequently, the automobile single plate spring connecting structure of the application adopts the blind hole structure at the lower pressing surface of the single plate spring, namely, the upper surface of the single plate spring, namely, the tension surface has no hole, the problem that the center hole is formed in the single plate spring and the edge of the center hole is cracked due to stress concentration is eliminated. This application test proves that improvement that can be very big haplopad is at the cracked risk of centre bore department, and through set up the locating pin in the blind hole, this locating pin is used for locating haplopad on the axle. The device has the remarkable advantages of convenience in installation, low manufacturing cost and long service life.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a front view of the structure of an embodiment of the present application;

FIG. 2 is an exploded view of the structure of an embodiment of the present application;

FIG. 3 is an exploded view of the leaf spring assembly of the embodiment of the present application;

fig. 4 is a schematic structural diagram of an upper backing plate according to an embodiment of the present application.

Reference numerals:

1. a leaf spring assembly; 2. a U-shaped bolt; 3. pressing a plate; 4. a base plate is arranged; 5. cushion blocks; 6. a nut; 7. an axle; 11. a single leaf spring; 12. pressing the dough; 13. blind holes; 14. positioning pins; 15. a wedge-shaped base plate; 16. a lower liner; 17. a rubber bushing; 41. flanging; 42. and (7) lightening holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.

The embodiment of the application provides a vehicle single-leaf spring connecting structure, which can solve the problem that a single-leaf spring is broken from a central hole in the prior art.

Referring to fig. 1 to 3, an embodiment of the present application provides a vehicle single leaf spring connecting structure, including:

an axle 7, where the axle 7 may be a steer axle or a drive axle, and the axle 7 of the present embodiment is a steer axle.

The plate spring assembly 1 comprises a single plate spring 11 positioned at the top of an axle 7, and a blind hole 13 is formed in a pressing surface 12, facing the axle 7, of the single plate spring 11, wherein the blind hole 13 does not penetrate through a tension surface of the single plate spring 11. The lower pressing surface 12 of the single-leaf spring 11 is provided with a positioning pin 14 positioned in the blind hole 13, the top of the positioning pin 14 is in interference connection with the blind hole 13 of the single-leaf spring 11, and the positioning pin 14 is used for positioning the single-leaf spring 11 on the axle 7, so that the positioning and the installation of the single-leaf spring 11 and the axle 7 are facilitated.

In the present exemplary embodiment, a blind hole 13 is provided in the pressing surface 12 of the single-leaf spring 11, the blind hole 13 being located in the center of the single-leaf spring 11, the blind hole 13 preferably being a cylindrical blind hole, the blind hole 13 not penetrating through the upper surface of the single-leaf spring 11, i.e. the tension surface.

The positioning pin 14 is of a step cylinder structure and is composed of two cylinders, the positioning pin 14 comprises an upper cylinder and a lower cylinder, the diameter of the upper cylinder is smaller than that of the lower cylinder, the outer diameter of the upper cylinder is slightly larger than the inner diameter of the blind hole 13, namely, the fit relation of the upper cylinder and the lower cylinder is interference fit, the interference fit ensures that the positioning pin 14 cannot be disengaged from the blind hole 13 of the single plate spring 11, and meanwhile, the assembly is convenient and the single plate spring 11 is not damaged.

The single plate spring 11 with the blind hole structure (the upper surface of the single plate spring 11, namely the tension surface, has no holes) eliminates the stress concentration at the edge of the central hole, and tests prove that the single plate spring can greatly improve the fracture at the central hole (generally, the fracture origin at the central hole is positioned on the upper surface of a steel plate spring, namely the edge of the central hole of the tension surface).

The automobile single plate spring connecting structure adopts a blind hole structure on the pressing surface 12 of the single plate spring 11, namely, no hole is formed in the upper surface of the single plate spring 11, namely, a tension surface, the problem that a central hole is formed in the single plate spring 11, and stress concentration and fracture occur at the edge of the central hole is solved. This application experiment proves that the cracked risk of monospar spring 11 in centre bore department that can be very big improves, and through set up locating pin 14 in blind hole 13, this locating pin 14 is used for fixing a position monospar spring 11 on axle 7. The device has the remarkable advantages of convenience in installation, low manufacturing cost and long service life.

In some alternative embodiments: referring to fig. 1 to 3, the present embodiment provides an automotive single leaf spring connection structure in which the thickness of a single leaf spring 11 is reduced from the middle to both ends in order to improve the elasticity and rigidity of the single leaf spring 11. The two ends of the single plate spring 11 are provided with rolling ears, rubber bushings 17 are pressed in the rolling ears, and the pressing surface 12 of the single plate spring 11 is a rectangular plane which is used for being attached to the axle 7 or the cushion block 5 at the bottom of the single plate spring 11.

In some alternative embodiments: referring to fig. 1 to 3, in the present embodiment, a cushion block 5 for supporting a single plate spring 11 is disposed on a top of an axle 7, a positioning hole connected to a positioning pin 14 is disposed on a top surface of the cushion block 5, a positioning protrusion (not shown) connected to the axle 7 is disposed on a bottom surface of the cushion block 5, and a positioning groove (not shown) adapted to the positioning protrusion is disposed on the top of the axle 7.

The cushion block 5 of the embodiment of the application is arranged according to arrangement requirements, and the single-leaf spring 11 can be directly installed on the axle 7 when the cushion block 5 is not arranged. This application embodiment is equipped with the locating hole of being connected with locating pin 14 at the top surface of cushion 5, is equipped with the location lug of being connected with axle 7 at the bottom surface of cushion 5, and the locating hole is connected with locating pin 14, realizes single leaf spring 11 and cushion 5 location fit. The locating lug is matched with a locating groove at the top of the vehicle axle 7 and used for locating the cushion block 5 at the top of the vehicle axle 7, and then the single plate spring 11 is located at the top of the vehicle axle 7.

In some alternative embodiments: referring to fig. 3, the embodiment of the present application provides an automobile single plate spring connecting structure, the automobile single plate spring connecting structure is provided with a wedge-shaped pad plate 15 for adjusting a caster angle of an axle 7 at the top of a cushion block 5, the thickness of one end of the wedge-shaped pad plate 15 gradually increases from one end to the other end, and the angle of the wedge-shaped pad plate 15 can be specifically set according to needs. A through hole penetrating into the positioning pin 14 is formed in the wedge-shaped base plate 15, and the wedge-shaped base plate 15 is located between the cushion block 5 and the single plate spring 11.

In some alternative embodiments: referring to fig. 3, the embodiment of the present application provides an automotive single leaf spring connection structure, in which a lower gasket 16 is disposed between a wedge-shaped backing plate 15 and a single leaf spring 11, and a through hole penetrating a positioning pin 14 is formed in the lower gasket 16. The lower gasket 16 is made of a non-metal material with lower hardness than the single-leaf spring 11, and the lower gasket 16 can improve the contact and abnormal wear when the wedge-shaped cushion plate 15 is directly arranged on the pressing surface 12 of the single-leaf spring 11, so that the reliability of the single-leaf spring 11 is improved.

In some alternative embodiments: referring to fig. 1, 2 and 4, the embodiment of the present application provides an automobile single plate spring connection structure, in which an upper pad plate 4 is disposed on a top of a single plate spring 11, a pressing plate 3 is disposed on the top of the upper pad plate 4, arc-shaped grooves are respectively disposed at two ends of the pressing plate 3, and the pressing plate 3, the upper pad plate 4, the single plate spring 11 and a cushion block 5 are sequentially fixed on an axle 7 through U-shaped bolts 2. The top surface of the axle 7 is provided with a mounting hole connected with the U-shaped bolt 2, and one end of the U-shaped bolt 2 penetrates into the mounting hole and is fixedly connected with the mounting hole through a nut 6.

The length of the upper backing plate 4 is greater than that of the pressing plate 3, two ends of the upper backing plate 4 are both provided with flanges 41 which are turned upwards, and the center of the upper backing plate 4 is provided with lightening holes 42. In order to solve the problem of positioning the upper backing plate 4 when the center hole of the single plate spring is not optimized to be the blind hole 13, two ends of the upper backing plate 4 are provided with flanges 41 which are turned upwards, longitudinal limiting is realized through the structure and the side surface of the pressing plate 3, and a gap of 1-2mm is reserved between the flanges 41 of the upper backing plate 4 and the side surface of the pressing plate 3 after installation.

And meanwhile, the U-shaped bolt 2 clamps the upper backing plate 4 to realize transverse positioning, and the positioning and installation of the upper backing plate 4 can be realized through the U-shaped bolt 2 and the pressing plate 3. The upper backing plate 4 is necessary for ensuring the reliability of the single-plate spring 11, the material of the upper backing plate 4 is a non-metal material with lower hardness than that of the single-plate spring 11, and the upper backing plate 4 can improve the contact and abnormal wear when the pressing plate 3 is directly arranged on the upper surface of the single-plate spring 11.

Tests prove that the upper backing plate 4 can greatly improve the fracture fault of the single-leaf spring 11 at the clamped part of the U-shaped bolt 2, so that the reliability of the single-leaf spring 11 is improved. The lightening holes 42 of the upper backing plate 4 are fabrication holes, can lighten the weight and have no positioning function.

Principle of operation

The embodiment of the application provides a car monolithic leaf spring connection structure, because the car monolithic leaf spring connection structure of this application has set up axle 7 and leaf spring assembly 1, wherein leaf spring assembly 1 is including the single leaf spring 11 that is located axle 7 top, be equipped with blind hole 13 at single leaf spring 11 towards axle 7's the face 12 that pushes down, single leaf spring 11's the face 12 that pushes down is equipped with the locating pin 14 that is located blind hole 13, locating pin 14 is in order to fix a position single leaf spring 11 on axle 7.

Therefore, the automobile single-plate spring connecting structure adopts the blind hole 13 structure on the pressing surface 12 of the single-plate spring 11, namely, no hole is formed on the upper surface, namely the tension surface, of the single-plate spring 11, and the problem that stress concentration and fracture occur on the edge of a central hole due to the fact that the central hole is formed in the single-plate spring 11 is solved. This application experiment proves that the cracked risk of monospar spring 11 in centre bore department that can be very big improves, and through set up locating pin 14 in blind hole 13, this locating pin 14 is used for fixing a position monospar spring 11 on axle 7. The device has the remarkable advantages of convenience in installation, low manufacturing cost and long service life.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be 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 application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automotive single plate spring connecting structure, characterized by comprising:

an axle (7);

leaf spring assembly (1), leaf spring assembly (1) is including single leaf spring (11) that are located axle (7) top, single leaf spring (11) are equipped with blind hole (13) towards pushing down face (12) of axle (7), the pushing down face of single leaf spring (11) is equipped with locating pin (14) that are located blind hole (13), locating pin (14) are in order to fix a position single leaf spring (11) on axle (7).

2. The vehicle one-piece leaf spring attachment structure according to claim 1, wherein:

the thickness of single leaf spring (11) is reduced to both ends by the middle part in proper order, the both ends of single leaf spring (11) are equipped with the grasswort, the grasswort copulae is connect in has rubber bush (17), the holding down face (12) of single leaf spring (11) are the rectangle plane.

3. The vehicle one-piece leaf spring attachment structure according to claim 1 or 2, wherein:

the top of axle (7) is equipped with cushion (5) that support single leaf spring (11), the top surface of cushion (5) is equipped with the locating hole of being connected with locating pin (14), the bottom surface of cushion (5) is equipped with the location lug of being connected with axle (7), the top of axle (7) is equipped with the positioning groove with the location lug adaptation.

4. The vehicle one-piece leaf spring attachment structure according to claim 3, wherein:

the top of cushion (5) is equipped with wedge backing plate (15) of adjusting axle (7) caster angle, set up on wedge backing plate (15) and penetrate the through-hole of locating pin (14), wedge backing plate (15) are located between cushion (5) and single leaf spring (11).

5. The automotive one-piece leaf spring attachment structure according to claim 4, wherein:

a lower gasket (16) is arranged between the wedge-shaped base plate (15) and the single plate spring (11), and a through hole penetrating into the positioning pin (14) is formed in the lower gasket (16).

6. The automotive one-piece leaf spring attachment structure according to claim 3, wherein:

the top of single leaf spring (11) is equipped with upper padding plate (4), the top of upper padding plate (4) is equipped with clamp plate (3), clamp plate (3) both ends are equipped with the arc slot respectively, clamp plate (3), upper padding plate (4), single leaf spring (11) and cushion (5) loop through U-shaped bolt (2) and fix on axle (7).

7. The automotive one-piece leaf spring attachment structure according to claim 6, wherein:

the length of the upper backing plate (4) is larger than that of the pressing plate (3), and two ends of the upper backing plate (4) are provided with flanges (41) which are turned upwards.

8. The automotive one-piece leaf spring attachment structure according to claim 6, wherein:

the top surface of the axle (7) is provided with a mounting hole connected with the U-shaped bolt (2), and one end of the U-shaped bolt (2) penetrates into the mounting hole and is fixedly connected with the mounting hole through a nut (6).

9. The vehicle one-piece leaf spring attachment structure according to claim 6, wherein:

the upper backing plate (4) is made of a non-metal material with the hardness lower than that of the single plate spring (11).

10. The vehicle one-piece leaf spring attachment structure according to claim 1, wherein:

the top of the positioning pin (14) is in interference connection with the blind hole (13) of the single plate spring (11).