CN108860036B - Adjustable damping type hydraulic energy absorption mechanism for automobile anti-collision beam - Google Patents
Adjustable damping type hydraulic energy absorption mechanism for automobile anti-collision beam Download PDFInfo
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- CN108860036B CN108860036B CN201810835112.7A CN201810835112A CN108860036B CN 108860036 B CN108860036 B CN 108860036B CN 201810835112 A CN201810835112 A CN 201810835112A CN 108860036 B CN108860036 B CN 108860036B
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- oil
- cylinder body
- pressure relief
- push rod
- space
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
- B60R19/20—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact containing mainly gas or liquid, e.g. inflatable
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Vibration Dampers (AREA)
Abstract
The invention discloses an adjustable damping type hydraulic energy absorption mechanism for an automobile anti-collision beam, which is applied to the field of automobile body structures and is connected between a frame main beam and an anti-collision beam, and comprises a main beam connecting plate, a cylinder body, a pressure relief piston, an end cover, a push rod and a push rod connecting plate; the pressure relief piston is axially provided with a drainage channel; the first sealing ring divides the internal space of the cylinder body into an oil-containing space and an oil-free space; the oil space is filled with hydraulic oil; the oil drainage channel is a through hole, one side of the oil drainage channel, which is close to the oil space, is blocked by a steel ball, and one side of the oil drainage channel, which is close to the oil-free space, is blocked by a pressure adjusting screw; the pressure adjusting screw is connected with the steel ball through a compression spring; the hydraulic cylinder also comprises a drain hole which is arranged on the pressure relief piston and is used for conducting a drain channel and an oil-free space inside the cylinder body. The invention absorbs the energy of the collision of the automobile anti-collision beam in a buffer mode of hydraulic oil, and can be triggered only when the external impact force is larger than a set value, so that the critical point of hydraulic energy absorption is adjustable.
Description
Technical Field
The invention belongs to the field of automobile body structures, and particularly relates to an adjustable damping type hydraulic energy absorbing mechanism for an automobile anti-collision beam.
Background
The anti-collision beam belongs to an important structure of automobile body safety, and is used for avoiding excessive injury and damage to the automobile body and ensuring the life safety of personnel in the automobile when the automobile collides. The existing automobile anti-collision beam mostly adopts a metal all-steel body structure, and collision energy absorption of the automobile anti-collision beam is also mainly completed by adopting special profile structures such as energy absorption holes/energy absorption grooves/energy absorption ribs and the like. However, the large impact force of hard collision cannot be well buffered, and the impact potential energy with large damage still exists after collision.
Disclosure of Invention
Therefore, the invention aims to provide the adjustable damping type hydraulic energy absorbing mechanism for the automobile anti-collision beam, which is additionally arranged between the anti-collision beam and the main beam of the frame, absorbs energy of the automobile anti-collision beam during collision in a buffer mode of hydraulic oil, does not trigger hydraulic buffer energy absorption during daily slight collision, only triggers when the external impact force is larger than a set value, realizes the adjustable critical point of hydraulic energy absorption, and can be flexibly selected according to specific automobile types and speeds.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an adjustable damping type hydraulic energy absorption mechanism for an automobile anti-collision beam is connected between a frame main beam and an anti-collision beam and comprises a main beam connecting plate, a cylinder body, a pressure relief piston, an end cover, a push rod and a push rod connecting plate; the main beam connecting plate is welded with the main beam of the frame and is connected with the cylinder body through a first bolt; the push rod connecting plate is welded with the push rod and is connected with the anti-collision beam through a second bolt; the end cover is connected with the cylinder body through a third bolt; the pressure relief piston is arranged in the cylinder body, and a first sealing ring is embedded between the periphery of the pressure relief piston and the inner wall of the cylinder body; an oil drainage channel is axially formed; the push rod penetrates through the end cover to extend into the cylinder body and is in threaded fit with the pressure relief piston; the first sealing ring divides the internal space of the cylinder body into an oil-containing space and an oil-free space; the cylinder body is provided with an oil filling hole communicated with an oil space; the oil space is filled with hydraulic oil; the oil drainage channel is a through hole, one side of the oil drainage channel, which is close to the oil space, is blocked by a steel ball, and one side of the oil drainage channel, which is close to the oil-free space, is blocked by a pressure adjusting screw; the pressure adjusting screw is in spiral fit with the oil drain channel and is connected with the steel ball through a compression spring; the hydraulic cylinder also comprises a drain hole which is arranged on the pressure relief piston and is used for conducting a drain channel and an oil-free space inside the cylinder body.
Preferably, the cylinder further comprises a second sealing ring arranged between the cylinder body and the end cover.
Preferably, the first sealing ring has at least two.
Preferably, at least two oil drain channels are provided, and all the oil drain channels are uniformly distributed along the axial direction of the pressure relief piston.
Preferably, at least one drain hole is in communication with each drain passage.
Preferably, the girder connecting plate, the cylinder body, the pressure relief piston, the end cover, the push rod and the push rod connecting plate are all made of aluminum alloy materials.
Preferably, the section diameter of the oil drain hole is not more than 1/4 of the section diameter of the oil drain channel.
The invention has the beneficial effects that: the hydraulic energy absorption device is additionally arranged between the anti-collision beam and the main beam of the frame, absorbs energy when the anti-collision beam of the automobile collides in a buffer mode of hydraulic oil, does not trigger hydraulic buffer energy absorption when the automobile collides slightly daily, and only triggers when the external impact force is larger than a set value, so that the critical point of hydraulic energy absorption is adjustable, and the hydraulic energy absorption device can be flexibly selected according to specific vehicle types and speeds. Meanwhile, the oil drainage channel and the oil drainage small hole can form two-stage damping energy absorption, so that the impact of external force on the vehicle body is effectively reduced.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:
FIG. 1 is a schematic view of the assembled structure of the present invention.
The figures are marked as follows: the hydraulic oil pressure relief device comprises a main beam connecting plate 1, a cylinder body 2, a pressure relief piston 3, an end cover 4, a push rod 5, a push rod connecting plate 6, a first bolt 7, a second bolt 8, a third bolt 9, a main frame beam 10, a first sealing ring 11, an oil relief channel 12, an oil space 13, an oil-free space 14, an oil filling hole 15, hydraulic oil 16, a steel ball 17, a pressure adjusting screw 18, a compression spring 19, an anti-collision beam 20, an oil relief small hole 21 and a second sealing ring 22.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, an adjustable damping type hydraulic energy absorbing mechanism for an automobile anti-collision beam is connected between a frame main beam 10 and an anti-collision beam 20 and comprises a main beam connecting plate 1, a cylinder body 2, a pressure relief piston 3, an end cover 4, a push rod 5 and a push rod connecting plate 6; the main beam connecting plate 1 is welded with the frame main beam 10 and is connected with the cylinder body 2 through a first bolt 7; the push rod connecting plate 6 is welded with the push rod 5 and is connected with the anti-collision beam 20 through a second bolt 8; the end cover 4 is connected with the cylinder body 2 through a third bolt 9; the pressure relief piston 3 is arranged in the cylinder body 2, and a first sealing ring 11 is embedded between the periphery of the pressure relief piston and the inner wall of the cylinder body 2; the axial direction of the device is provided with an oil drainage channel 12; the push rod 5 penetrates through the end cover 4 to extend into the cylinder body 2 and is in threaded fit with the pressure relief piston 3; the first sealing ring 11 divides the internal space of the cylinder body 2 into an oil-containing space 13 and an oil-free space 14; the cylinder body 2 is provided with an oil filling hole 15 communicated with the oil space 13; the oil space 13 is filled with hydraulic oil 16; the oil drain channel 12 is a through hole, one side of the oil drain channel, which is close to the oil space 13, is blocked by a steel ball 17, and one side of the oil drain channel, which is close to the oil-free space 14, is blocked by a pressure adjusting screw 18; the pressure adjusting screw 18 is in spiral fit with the oil drain channel 12 and is connected with the steel ball 17 through the compression spring 19; and also comprises a drain hole 21 which is arranged on the pressure relief piston 3 and is communicated with the drain channel 12 and the oil-free space 14 inside the cylinder body.
Firstly, the energy absorbing mechanism is additionally arranged between a main frame beam 10 and an anti-collision beam 20 according to the structural sequence in fig. 1, the tightness of a compression spring 19 for compressing a steel ball 17 is well adjusted through a pressure adjusting screw 18, then hydraulic oil 16 is injected into an oil space 13 in a cylinder body 2 through an oil filling hole 15, the oil filling hole 15 is sealed and locked through a set screw (not shown in the figure), and the hydraulic oil 16 is blocked by a first sealing ring 11 to prevent the hydraulic oil from flowing into an oil-free space 14.
When collision occurs, the impact force transmission sequence is as follows: when the reaction force generated by the compression of the piston is borne by the hydraulic oil 16, and is large enough to overcome the compression force of the compression spring 19 for compressing the steel ball 17, the steel ball 17 breaks through a critical motion state, the compression spring 19 starts to be reversely compressed, the oil drainage channel 12 is opened, the hydraulic oil 16 overflows to the oil-free space 14 from the oil-free space 13 through the oil drainage channel 12 and the oil drainage small hole 21, the energy of the collision of the automobile anti-collision beam is absorbed in a buffer mode of the hydraulic oil, and the collision impact injury to the automobile body and personnel in the automobile is reduced. The energy absorption mechanism can not trigger hydraulic buffering energy absorption during daily slight collision, and can be triggered only when the external impact force is larger than a set value, wherein the set value is a value for overcoming the pressing force of the pressing spring 19 for pressing the steel ball 17, and the set value can be changed by adjusting the pressure adjusting screw 18, so that the critical point of hydraulic energy absorption is adjustable, and flexible selection can be performed according to specific vehicle types and speeds.
In this embodiment, it can be seen from the figure that the cross-sectional diameter of the oil drainage channel 12 is far greater than the cross-sectional diameter of the oil drainage small hole 21, so that the oil drainage channel 12 and the oil drainage small hole 21 can form two-stage damping energy absorption, thereby effectively reducing the impact of external force on the vehicle body.
Further, the present embodiment further includes a second seal ring 22 disposed between the cylinder 2 and the end cap 4 to improve sealability after the hydraulic energy absorbing mechanism is activated, and to prevent hydraulic oil from overflowing from a gap between the cylinder 2 and the end cap 4 after collision.
Further, the first sealing rings 11 adopted in this embodiment have three sealing rings, so as to fully ensure the isolation effect of the oil-free space 13 and the oil-free space 14 on the hydraulic oil.
Furthermore, the number of the two oil drain passages 12 adopted in the embodiment is two, or three or four oil drain passages can be adopted, and only the even distribution of all the oil drain passages 12 along the axial direction of the pressure relief piston 3 is required, so that even stress during hydraulic oil buffering can be realized by even distribution.
Furthermore, in this embodiment, one oil drain hole 21 is used to connect with each oil drain channel 12, and of course, two or three oil drain holes may be used, so long as two-stage damping energy absorption can be formed with the oil drain channels 12.
Furthermore, the girder connecting plate 1, the cylinder body 2, the pressure relief piston 3, the end cover 4, the push rod 5 and the push rod connecting plate 6 are all made of aluminum alloy materials, so that the weight of the vehicle body is properly reduced under the condition of meeting the strength requirement.
Furthermore, the cross-sectional diameter of the oil drain hole 21 is not more than 1/4 of the cross-sectional diameter of the oil drain channel 12, and if the diameter of the oil drain hole 21 is larger than or equal to the diameter of the oil drain channel 12, the two-stage damping energy absorption function cannot be achieved, and only the diameter of the oil drain hole is smaller than or far smaller than the diameter of the oil drain channel 12.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides an adjustable damping formula hydraulic energy-absorbing mechanism for automobile anti-collision beam, connects between frame girder and anti-collision beam, its characterized in that: the device comprises a main beam connecting plate, a cylinder body, a pressure relief piston, an end cover, a push rod and a push rod connecting plate; the main beam connecting plate is welded with the main beam of the frame and is connected with the cylinder body through a first bolt; the push rod connecting plate is welded with the push rod and is connected with the anti-collision beam through a second bolt; the end cover is connected with the cylinder body through a third bolt; the pressure relief piston is arranged in the cylinder body, and a first sealing ring is embedded between the periphery of the pressure relief piston and the inner wall of the cylinder body; an oil drainage channel is axially formed; the push rod penetrates through the end cover to extend into the cylinder body and is in threaded fit with the pressure relief piston; the first sealing ring divides the internal space of the cylinder body into an oil-containing space and an oil-free space; the cylinder body is provided with an oil filling hole communicated with an oil space; the oil space is filled with hydraulic oil; the oil drainage channel is a through hole, one side of the oil drainage channel, which is close to the oil space, is blocked by a steel ball, and one side of the oil drainage channel, which is close to the oil-free space, is blocked by a pressure adjusting screw; the pressure adjusting screw is in spiral fit with the oil drain channel and is connected with the steel ball through a compression spring; the oil drainage device further comprises oil drainage small holes which are formed in the pressure relief piston and used for conducting oil drainage channels and oil-free spaces inside the cylinder body, and a second sealing ring which is arranged between the cylinder body and the end cover, wherein at least two oil drainage channels are formed, and all oil drainage channels are uniformly distributed along the axial direction of the pressure relief piston.
2. The adjustable damping hydraulic energy absorbing mechanism for an automotive impact beam of claim 1, wherein: at least two first sealing rings are arranged.
3. The adjustable damping hydraulic energy absorbing mechanism for an automotive impact beam of claim 1, wherein: at least one oil drain hole communicated with each oil drain channel.
4. The adjustable damping hydraulic energy absorbing mechanism for an automotive impact beam of claim 1, wherein: the girder connecting plate, the cylinder body, the pressure relief piston, the end cover, the push rod and the push rod connecting plate are all made of aluminum alloy materials.
5. The adjustable damping hydraulic energy absorbing mechanism for an automotive impact beam of claim 1, wherein: the section diameter of the oil drain hole is not more than 1/4 of the section diameter of the oil drain channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810835112.7A CN108860036B (en) | 2018-07-26 | 2018-07-26 | Adjustable damping type hydraulic energy absorption mechanism for automobile anti-collision beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810835112.7A CN108860036B (en) | 2018-07-26 | 2018-07-26 | Adjustable damping type hydraulic energy absorption mechanism for automobile anti-collision beam |
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| Publication Number | Publication Date |
|---|---|
| CN108860036A CN108860036A (en) | 2018-11-23 |
| CN108860036B true CN108860036B (en) | 2023-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810835112.7A Active CN108860036B (en) | 2018-07-26 | 2018-07-26 | Adjustable damping type hydraulic energy absorption mechanism for automobile anti-collision beam |
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| US5425238A (en) * | 1992-06-01 | 1995-06-20 | Kawasaki Jukogyo Kabushiki Kaisha | Hydraulic nonstep transmission apparatus |
| CN200974513Y (en) * | 2006-02-22 | 2007-11-14 | 胡元哲 | Truck tailstock buffer crash-proof rack |
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| CN203189596U (en) * | 2013-04-02 | 2013-09-11 | 江苏昌力油缸有限公司 | Controllable reset damping oil cylinder |
| CN203939801U (en) * | 2014-01-23 | 2014-11-12 | 中铁工程设计院有限公司 | Double-piston band free buffer stroke cylinder |
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| CN108860036A (en) | 2018-11-23 |
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