CN215567617U

CN215567617U - Shock absorber and automobile

Info

Publication number: CN215567617U
Application number: CN202121216786.2U
Authority: CN
Inventors: 王阳; 陈巧雨; 陈晶艳; 黄纬; 闫世明
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2022-01-18
Anticipated expiration: 2031-06-01

Abstract

The utility model relates to a shock absorber and an automobile, comprising: the lower cylinder of bumper shock absorber, be equipped with the piston rod in the lower cylinder of bumper shock absorber, the tip of piston rod is provided with the support pedestal, upward be equipped with the bush in the support pedestal, it includes inner core and outer core to go up the support pedestal, the outside of piston rod is located to the inner core cover, outer core is located between inner core and the bush, the inner core has the tube-shape portion that is located the piston rod outside and the umbelliform portion that extends from the outside downward sloping of tube-shape portion, the first recess towards the inner core is seted up to the inboard of outer core, umbelliform portion is located first recess and can first recess motion relatively when the vehicle received external force. Go up the surface of supporting seat and be provided with metal framework, go up the below of supporting seat and be equipped with tray on the spring, buffer spring is installed to the bottom of tray on the spring, and the top of going up the supporting seat has tight latch fitting, and the distance between the top of tight latch fitting and buffer spring's the top is less than or equal to 37 mm. The utility model also provides an automobile mounted on the shock absorber.

Description

Shock absorber and automobile

Technical Field

The utility model relates to the technical field of shock absorbers, in particular to a shock absorber and an automobile.

Background

As shown in fig. 1, an upper supporting seat a100 of a shock absorber strut in the prior art generally comprises an upper plate a1, a lower plate a2, an inner core a3, a bushing a4, a shock absorber shaft a5, a spring bearing a6, a spring pad a7 and the like; the bushing a4 is a core component of the structure, and bears multiple functional requirements such as bearing, damping vibration, bearing load and lateral force, bearing torque and the like.

The upper support seat a100 of the shock absorber strut is generally used on the shock absorber strut of a macpherson suspension system, and functions as: bearing the load of the ground to the vehicle; damping high frequency vibrations when the vehicle is in motion; the torque brought by the swinging of the shock absorber is borne when the suspension moves; when the vehicle body is inclined, the lateral force applied to the vehicle by the ground is borne; when the vehicle turns or the like to cause the tire to swing, a rotational degree of freedom is provided.

The upper support seat a100 of the prior art shock absorber strut has a large axial dimension due to the need for the bushing a3 to perform multiple functions. In the vehicle dimension chain, the dimension from bottom to top is the tire diameter, the height of a suspension spring, the height of an upper support seat a100 of a shock absorber strut, a pedestrian protection collision safety space and the Z-direction dimension of an engine hood. In the event of a pedestrian collision, the lower the height of the shock absorber, the further the distance between the hood and the shock absorber below the shock absorber, the greater the degree of cushioning of the pedestrian on the hood, and the safer the pedestrian. Therefore, when the height of the upper support seat a100 of the shock absorber strut is large, the pedestrian collision protection safety space is reduced.

The foregoing description is provided for general background information and is not admitted to be prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a shock absorber and an automobile, which can increase the vertical distance below an engine hood and provide a safe buffer space for pedestrians when the pedestrians impact on the engine hood.

The present invention provides a shock absorber, comprising: the lower section of thick bamboo of bumper shock absorber, be equipped with the piston rod in the lower section of thick bamboo of bumper shock absorber, the tip of piston rod is provided with the support pedestal, be equipped with the bush in the upper support pedestal, the upper support pedestal includes inner core and outer core, the inner core cover is located the outside of piston rod, outer core is located the inner core with between the bush, the inner core has and is located the tube-shape portion in the piston rod outside and the umbelliform portion that extends from the outside downward sloping of tube-shape portion, the orientation has been seted up to the inboard of outer core the first recess of inner core, umbelliform position in just can be relative when the vehicle receives external force in the first recess motion.

Further, the surface of going up the supporting seat is provided with metal framework, the below of going up the supporting seat is equipped with tray on the spring, buffer spring is installed to the bottom of tray on the spring, the top of going up the supporting seat has tight latch fitting, the top of tight latch fitting with distance less than or equal to 37mm between buffer spring's the top.

Further, the distance between the outer end of the umbrella-shaped part and the bottom of the first groove is 2.5 mm.

Furthermore, an annular second groove is formed in the position, close to the edge, of the outer core, and the opening direction of the second groove is perpendicular to the opening direction of the first groove.

Furthermore, the second groove is provided with two opposite curved surfaces and a plane clamped between the two curved surfaces, the curved surface close to the inner side of the second groove is perpendicular to the plane, and an included angle between the curved surface close to the outer side of the second groove and the plane is an obtuse angle.

Furthermore, a filling port is formed in the inner side of the outer core, a lubricating grease groove is formed in the upper wall surface and the lower wall surface of the first groove, the lubricating grease groove is communicated with the filling port, and a sealing ring is arranged on the upper wall surface and the lower wall surface of one end, close to the opening, of the first groove.

Further, the grease groove includes first grease groove and a plurality of second grease groove, first grease groove establishes on the upper and lower wall of first recess, second grease groove certainly first grease groove is radial outside extension.

Furthermore, an annular groove is formed in the end portion of the piston rod, the inner core is arranged in the annular groove, two opposite surfaces of the annular groove are parallel, and the distance between the two opposite surfaces is 7-9 mm.

The utility model also provides an automobile which comprises the shock absorber, wherein the lower shock absorber tube of the shock absorber is connected with the automobile frame, and the upper supporting seat of the shock absorber is connected with the automobile body.

According to the shock absorber and the automobile provided by the utility model, due to the addition of the inner core and outer core structures, the height of the lining can be greatly reduced, the effective height L of the supporting seat can be reduced by more than 40%, the vertical distance below the engine hood is further increased, and a safe buffering space is provided for pedestrians when the pedestrians impact on the engine hood.

Drawings

Fig. 1 is a schematic view of a conventional shock absorber strut arrangement.

Fig. 2 is a partial structural view of the shock absorber of the present invention.

Fig. 3 is an enlarged structural view of the upper support seat in fig. 2.

Fig. 4 is a schematic view of the structure of the outer core of the shock absorber.

Fig. 5 is a schematic view of a stiffness adjusting structure of the shock absorber.

The shock absorber comprises a shock absorber 100, a shock absorber lower cylinder 1, a piston rod 2, an upper supporting seat 3, an annular groove 4, an inner core 5, an outer core 6, a bushing 7, an outer sleeve 8, a locking piece 9, a metal framework 10, a first groove 11, a filling port 12, a sealing ring 13, a first grease groove 14, a second grease groove 15, a second groove 16, a spring upper tray 17, a buffer spring 18, a cylindrical part A, an umbrella-shaped part B, a rigidity adjusting structure C, a first protrusion D and a second protrusion E

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

As shown in fig. 2 and 3, the present invention provides a shock absorber 100, which comprises a shock absorber lower cylinder 1, a piston rod 2 and an upper support base 3. The piston rod 2 is arranged in the lower cylinder 1 of the shock absorber, and the upper supporting seat 3 is fixed at the upper end part of the piston rod 2.

Specifically, the upper end of the piston rod 2 is provided with an annular groove 4, two opposite surfaces of the annular groove 4 are parallel, and the distance between the opposite surfaces is 8 mm.

The upper supporting seat 3 comprises an inner core 5, an outer core 6, a bushing 7, an outer sleeve 8, a locking piece 9 and a metal framework 10.

An inner core 5 is connected in the annular groove 4 of the piston rod 2 in a clamping mode, a cylindrical part A of the inner core 5 is connected in the annular groove 4 in a clamping mode, and an umbrella-shaped part B extends from the outer side of the cylindrical part A in a downward inclined mode.

As shown in fig. 4, the outer core 6 is a circular ring structure and has an inner side and an outer side, the inner side is a side close to the center of the circular ring structure, and the outer side is a side far from the center of the circular ring structure. First groove 11 has been seted up on the inboard of ring structure, and the opening direction of first groove 11 is towards the centre of a circle of ring structure to the cover is established on inner core 5, and the bottom distance of the outer end of umbelliform portion B to first groove 11 is 2.5 mm.

Understandably, when shock absorber 100 is subjected to an external force, for example: when the vehicle body rolls or is subjected to lateral force, the shock absorber axis (the piston rod 2) can deflect relative to the vehicle body to a certain degree, and the deflection does not come from tensile compression deformation of the bushing 7 but comes from relative movement of the inner core 5 and the outer core 6 (the maximum deflection angle of 2-5 degrees can be realized by adjusting design parameters). The inner core 5 and the outer core 6 are sleeved together and have a gap structure, the upper supporting seat and the bush (bush a4) of the piston rod (shock absorber shaft a5) which is originally long in the background art can be used in cooperation with the inner core structure and the upper supporting seat 3 of the piston rod 2 which is short in length instead of cooperation with the inner core structure, the height of the whole upper supporting seat 3 is reduced to the maximum extent by the substituted structure, the distance between the shock absorber 100 and the engine hood is further increased, and the buffer space during collision is also increased.

Furthermore, the outer core 6 is provided with filling ports 12 on the upper and lower walls of the first groove 11, grease grooves are provided on the upper and lower walls of the first groove 11, the grease grooves are communicated with the filling ports 12, and sealing rings 13 are provided on the upper and lower walls of the end of the first groove 11 close to the opening. Understandably, the filling port 12 arranged on the first groove 11 is used for filling lubricating grease, the lubricating grease groove is used for storing lubricating grease, and the filling of the lubricating grease can avoid the abrasion of the inner core 5 and the outer core 6 caused by the mutual movement and the squeak noise and the unsmooth feeling brought by the mutual movement; the structure of the upper and lower sealing rings 13 at the opening of the first groove 11 can prevent lubricating grease from leaking.

Further, the grease groove has a first grease groove 14 and a plurality of second grease grooves 15, the first grease groove 14 is annular and is formed on the upper and lower wall surfaces of the inner end of the first groove 11, and the second grease grooves 15 are communicated with the first grease groove 14 and radially extend outwards from the first grease groove 14. The arrangement of the first grease groove 14 and the second grease groove 15 can ensure that the inner core 5 and the outer core 6 are lubricated more fully, and abrasion caused by friction and creaky noise and unsmooth feeling caused by friction are reduced.

Furthermore, the upper end and the lower end of the outer side of the outer core 6 are provided with two opposite second grooves 16, and the opening directions of the two second grooves 16 are perpendicular to the opening direction of the first groove 11. The second groove 16 is annular and the second groove 16 has two opposite curved surfaces and a plane sandwiched between the two curved surfaces, the curved surface near the inside of the outer core 6 being perpendicular to the plane, and the angle between the curved surface and the plane being an obtuse angle, in this embodiment 135 °. The bushing 7 is located outside the outer core 6, the outer sleeve 8 is located outside the bushing 7, the upper side and the lower side of the bushing 7 are respectively provided with a rigidity adjusting structure C, as shown in fig. 5, the metal framework 10 wraps the rigidity adjusting structure C, the rigidity adjusting structure C is in a circular ring shape and is made of a rubber material, the surface of the rigidity adjusting structure C in contact with the metal framework 10 is provided with first bulges D and second bulges E which are higher and lower and are alternately arranged on the surface of the rigidity adjusting structure C, the second bulges E which are lower can attenuate larger vibration compared with the first bulges D, when the force of the metal framework 10 is transmitted to the rigidity adjusting structure C, the first bulges D firstly play a role in bearing, attenuating vibration, bearing load and lateral force, if the first bulges D are difficult to attenuate vibration, the force of the metal framework 10 is transmitted to the second bulges E, and then the second bulges E which are lower play a role in bearing, and, The effect of damping vibrations, bearing load and lateral force, the hierarchical shock attenuation can be realized to the setting of the first protruding D of height difference and two protruding C, and then the absorbing effect of maximum realization. Specifically, the outside of the outer core 6, the outer sleeve 8 and the rigidity adjusting structure are formed into a closed space which is internally vulcanized with a bushing 7 made of rubber materials, the vulcanized rubber materials can play a role in bearing, attenuating vibration, bearing load and lateral force, and the bushing 7 can be filled in the second groove 16 to play a more stable role due to the existence of the second groove 16 with a special structure on the outside of the outer core 6.

Referring to fig. 1, the locking member 9 is a nut locked at the upper end of the annular groove 4 of the piston rod 2. The metal framework 10 wraps the entire upper supporting seat 3. An upper spring tray 17 is provided below the upper support base 3 at the end of the piston rod 2, and a buffer spring 18 is attached to the bottom of the upper spring tray 17.

The utility model also provides an automobile which comprises the shock absorber 100, wherein the lower shock absorber tube 1 of the shock absorber 100 is connected with a frame, and the upper support seat 3 of the shock absorber 100 is connected with an automobile body.

As described above, when the shock absorber 100 having the above structure receives an external force, for example: when the vehicle body rolls or receives a lateral force, the shock absorber axis (the piston rod 2) can deflect with the vehicle body to a certain extent, at the moment, the deflection does not come from the tensile compression deformation of the bushing 7, but comes from the relative motion of the inner core 5 and the outer core 6 (the maximum deflection angle of 2-5 degrees can be realized by adjusting design parameters), so that the stress of the bushing 7 is relatively reduced, the design height of the bushing 7 can be reduced, finally, the height size of the whole shock absorber can be reduced, the distance between the top end of the nut and the top end of the buffer spring 18 can be reduced by more than 40% compared with the prior art, the distance between the top end of the nut and the top end of the buffer spring 18 is 37mm in the embodiment, further, more safety spaces are provided for pedestrian protection collision, and more Z-direction freedom degrees are provided for the design of the external shape of the vehicle.

In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 can be understood in a specific case to those of ordinary skill in the art.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the purpose of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

As used herein, the ordinal adjectives "first", "second", etc., used to describe an element are merely to distinguish between similar elements and do not imply that the elements so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.

As used herein, the meaning of "a plurality" or "a plurality" is two or more unless otherwise specified.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A shock absorber, comprising: a lower shock absorber tube (1), a piston rod (2) is arranged in the lower shock absorber tube (1), an upper supporting seat (3) is arranged at the end part of the piston rod (2), a bushing (7) is arranged in the upper supporting seat (3), it is characterized in that the upper supporting seat (3) comprises an inner core (5) and an outer core (6), the inner core (5) is sleeved outside the piston rod (2), the outer core (6) is positioned between the inner core (5) and the bushing (7), the inner core (5) is provided with a cylindrical part (A) positioned at the outer side of the piston rod (2) and an umbrella-shaped part (B) extending downwards from the outer side of the cylindrical part (A), the inner side of the outer core (6) is provided with a first groove (11) facing the inner core (5), the umbrella-shaped part (B) is positioned in the first groove (11) and can move relative to the first groove (11) when the vehicle is subjected to external force.

2. The shock absorber according to claim 1, wherein the outer surface of the upper supporting seat (3) is provided with a metal framework (10), a spring upper tray (17) is arranged below the upper supporting seat (3), a buffer spring (18) is arranged at the bottom of the spring upper tray (17), a locking piece (9) is arranged at the top of the upper supporting seat (3), and the distance between the top end of the locking piece (9) and the top end of the buffer spring (18) is less than or equal to 37 mm.

3. A shock absorber according to claim 1, wherein the distance between the outer end of the umbrella (B) and the bottom of the first groove (11) is 2.5 mm.

4. A damper according to any one of claims 1-3, characterised in that the outer core (6) is provided with a second groove (16) in the form of a ring near the edge, the opening of the second groove (16) being directed perpendicularly to the opening of the first groove (11).

5. A damper according to claim 4, characterized in that the second recess (16) has two opposite curved surfaces and a plane surface sandwiched between the curved surfaces, the curved surface near the inner side of the second recess (16) being perpendicular to the plane surface, and the angle between the curved surface near the outer side of the second recess (16) and the plane surface being obtuse.

6. The shock absorber according to claim 4, wherein a filling port (12) is formed in the inner side of the outer core (6), grease grooves are formed in the upper and lower wall surfaces of the first groove (11), the grease grooves are communicated with the filling port (12), and sealing rings (13) are mounted on the upper and lower wall surfaces of one end of the first groove (11) close to the opening.

7. The damper according to claim 6, wherein the grease groove includes a first grease groove (14) and a plurality of second grease grooves (16), the first grease groove (14) being provided on upper and lower wall surfaces of the first recess (11), the second grease grooves (16) extending radially outward from the first grease groove (14).

8. The shock absorber according to claim 1, wherein an annular groove is formed in the end of the piston rod (2), the inner core (5) is mounted in the annular groove, two opposite surfaces of the annular groove are parallel, and the distance between the two opposite surfaces is 7mm to 9 mm.

9. An automobile, characterized in that it comprises a shock absorber according to any one of claims 1 to 8, the shock absorber lower tube (1) of which is connected to the frame and the shock absorber upper support (3) is connected to the body.