CN209977126U - Shock absorber for electric vehicle - Google Patents
Shock absorber for electric vehicle Download PDFInfo
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- CN209977126U CN209977126U CN201920468634.8U CN201920468634U CN209977126U CN 209977126 U CN209977126 U CN 209977126U CN 201920468634 U CN201920468634 U CN 201920468634U CN 209977126 U CN209977126 U CN 209977126U
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- spring
- telescopic shaft
- telescopic
- fixing column
- buffer area
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Abstract
The utility model discloses a shock absorber for an electric vehicle, which comprises a first fixed column and a second fixed column which are coaxially arranged, wherein a first telescopic shaft is fixedly arranged on the first fixed column through a coaxial line, and a second telescopic shaft is fixedly arranged on the second fixed column through a coaxial line; the second telescopic shaft is arranged on the first telescopic shaft in a telescopic manner through a spring device, a telescopic hole for the second telescopic shaft to stretch is formed in the first telescopic shaft, and the first telescopic shaft and the second telescopic shaft are coaxial; the spring device comprises a first spring and a second spring which are coaxially arranged. The utility model provides the high shock attenuation effect of bumper shock absorber realizes multistage buffering, has compromise cost and shock attenuation effect for the air spring.
Description
Technical Field
The utility model relates to an electric motor car technical field specifically is a bumper shock absorber for electric motor car.
Background
With the continuous development of the electric vehicle industry, the competition of the electric vehicle industry is more and more intense, and each part of the electric vehicle needs to reasonably control the production cost; present electric motor car damping device is diversified, wherein the better cost of shock attenuation is higher, for example, the air spring, it then has the not good problem of shock attenuation effect to form the lower bumper shock absorber of this cost, this kind of bumper shock absorber mostly is the shock attenuation of nested spring realization on the telescopic link, though simple structure, but its shock attenuation effect mainly relies on be single spring above that, if select the lower spring of rigidity, can cause spring transition compression when outside atress is too big, cause easily to interfere between tire and the frame, if when selecting the great spring of rigidity, then the shock attenuation effect can reduce.
SUMMERY OF THE UTILITY MODEL
The technique that exists is not enough to the aforesaid, the utility model aims at providing a bumper shock absorber for electric motor car has improved the shock attenuation effect of bumper shock absorber, realizes the multistage buffering, has compromise cost and shock attenuation effect for the air spring.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides a shock absorber for an electric vehicle, which comprises a first fixed column and a second fixed column which are coaxially arranged, wherein the first fixed column and the second fixed column have the same size and structure, a first telescopic shaft is fixedly arranged on the first fixed column through a coaxial line, and a second telescopic shaft is fixedly arranged on the second fixed column through a coaxial line; the second telescopic shaft is arranged on the first telescopic shaft in a telescopic manner through a spring device, a telescopic hole for the second telescopic shaft to stretch is formed in the first telescopic shaft, and the first telescopic shaft and the second telescopic shaft are coaxial; the spring device comprises a first spring and a second spring which are coaxially arranged.
Preferably, the stiffness of the second spring is greater than the stiffness of the first spring, and the direction of the spiral line corresponding to the first spring is opposite to the direction of the spiral line corresponding to the second spring; the length of the first spring is greater than that of the second spring, and the length of the second spring is greater than that of the second telescopic shaft.
Preferably, two ends of the first spring are respectively and fixedly arranged on the first fixing column and the second fixing column, and the first spring is nested on the second spring; the inner diameter of the first spring is larger than the outer diameter of the second spring, the inner diameter of the second spring is the same as the outer diameter of the first telescopic shaft, and the outer diameter of the second spring is smaller than the outer diameter of the first fixing column.
Preferably, the end part of the second telescopic shaft far away from the second fixed column is fixedly provided with a sliding column which slides in the telescopic hole, the outer diameter of the sliding column is the same as the inner diameter of the telescopic hole and is larger than the outer diameter of the second telescopic shaft, the end part of the first telescopic shaft far away from the first fixed column is provided with a baffle ring, and the inner diameter of the baffle ring is the same as the outer diameter of the second telescopic shaft.
Preferably, a plurality of through grooves which are uniformly distributed along the circumferential direction are formed in the outer circumferential wall of the sliding column and the inner circumferential wall of the baffle ring.
Preferably, the sliding column divides the telescopic hole into a forward buffer area and a reverse buffer area, and when the first telescopic shaft and the second telescopic shaft move in opposite directions, the volume corresponding to the forward buffer area is reduced, and the volume corresponding to the reverse buffer area is increased; when the spring device is in a natural state, the length of the reverse buffer area is smaller than that of the forward buffer area.
Preferably, the first fixing column and the second fixing column are both fixedly provided with connecting lugs, and connecting holes are formed in the connecting lugs.
The beneficial effects of the utility model reside in that: the utility model discloses set up two springs on the telescopic shaft, and utilize the length and the difference of rigidity of two springs, realized the buffering effect of second grade, improved the shock attenuation effect of bumper shock absorber, when the bumper shock absorber meets the load lower, can utilize the first spring that the rigidity is lower to produce the first level buffering, when the bumper shock absorber meets the load higher, can utilize the second level buffering that the second spring that the rigidity is higher produces again after the first level buffering, and then avoid the first spring to produce the transition compression and cause the flexible stroke overlength of bumper shock absorber; in addition, the sliding column divides the telescopic hole into a forward buffer area and a reverse buffer area, the buffer area can be buffered by utilizing the volume change of the buffer area, the third-level buffer is realized, and the buffer effect of the shock absorber is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a shock absorber for an electric vehicle according to an embodiment of the present invention;
FIG. 2 is an exploded view of FIG. 1;
fig. 3 is a cross-sectional view of a shock absorber for an electric vehicle according to an embodiment of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 3;
fig. 5 is a schematic structural view of a strut.
Description of reference numerals: 1-a first fixed column, 10-a first telescopic shaft, 11-a telescopic hole, 111-a forward buffer area, 112-a reverse buffer area, 12-a retaining ring, 121-a fixed bolt, 2-a second fixed column, 20-a second telescopic shaft, 21-a sliding column, 211-a through groove, 3-a first spring, 4-a second spring, 5-a connecting lug and 51-a connecting hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example (b): as shown in fig. 1, the utility model provides a damper for electric vehicle, which comprises a first fixing column 1 and a second fixing column 2 which are coaxially arranged, wherein the first fixing column 1 and the second fixing column 2 have the same size and structure, the first fixing column 1 and the second fixing column 2 are both fixedly provided with a connecting lug 5, and the connecting lug 5 is provided with a connecting hole 51; a first telescopic shaft 10 is coaxially and fixedly arranged on the first fixing column 1, and a second telescopic shaft 20 is coaxially and fixedly arranged on the second fixing column 2; the second telescopic shaft 20 is telescopically arranged on the first telescopic shaft 10 through a spring device, a telescopic hole 11 for the second telescopic shaft 20 to stretch is formed in the first telescopic shaft 10, and the first telescopic shaft 10 and the second telescopic shaft 20 are coaxial;
with reference to fig. 2 and 3, the spring device includes a first spring 3 and a second spring 4 coaxially disposed, wherein the first spring 3 is nested on the second spring 4, the second spring 4 is nested on the first telescopic shaft 10 and the second telescopic shaft 20, two ends of the first spring 3 are respectively and fixedly disposed on the first fixing column 1 and the second fixing column 2, an inner diameter of the first spring 3 is larger than an outer diameter of the second spring 4, an inner diameter of the second spring 4 is the same as the outer diameter of the first telescopic shaft 10, and an outer diameter of the second spring 4 is smaller than the outer diameter of the first fixing column 1 (or the second fixing column 2); in addition, the length of the first spring 3 is greater than that of the second spring 4, the stiffness of the second spring 4 is greater than that of the first spring 3, when the first telescopic shaft 10 and the second telescopic shaft 20 move towards each other (in the arrow direction in fig. 3), the first spring 3 is preferentially compressed to form a first-stage buffer, then the second spring 4 is compressed to form a second-stage buffer, and the stiffness of the second spring 4 is greater than that of the first spring 3, so that when the shock absorber meets a low load, the first spring 3 can be used for buffering, when the load is high, the second spring 4 with higher rigidity can be used for buffering after the first spring buffer 3 is used for buffering, further, the telescopic stroke of the shock absorber caused by transitional compression of the first spring 3 is avoided, the existing shock absorber cannot be considered too long by adopting a single spring, and when the load is low, better buffering is required, the rigidity of the spring is lower, and at the moment, if a large load is met, a larger compression stroke is generated, otherwise, if the compression stroke is reduced by adopting the spring with higher rigidity, the buffering effect is poor when a bottom load is met; in addition, the stiffness and the length of the first spring 3 and the second spring 4 can be set by themselves in actual production, and the application is not limited to this.
Further, with reference to fig. 3, the spiral direction of the spiral line corresponding to the first spring 3 is opposite to the spiral direction of the spiral line corresponding to the second spring 4, and the arrangement makes the two springs intersect with each other, so that interference between the two springs due to external force is avoided, for example, if the spiral directions of the two springs are the same, the first spring 3 is embedded into the second spring 4 to overlap when the first spring receives external force in a radial direction (which is the radial direction of the spring); in addition, the length of the second spring 4 is greater than the length of the second telescopic shaft 20, which arrangement ensures that the shock absorber, when in operation, at least a portion of the second spring 4 is nested on the first telescopic shaft 10 and the second telescopic shaft 20, according to fig. 3, since the second telescopic shaft 20 is telescopic in the first telescopic shaft 10, the length of the second telescopic shaft 20 protruding beyond the first telescopic shaft 10 is less than its own length, therefore, no matter the first spring 3 is compressed and stretched, the second spring 4 can ensure that one part of the second spring is nested on the first telescopic shaft 10 and one part of the second spring is nested on the second telescopic shaft 20, so that the second spring 4 is prevented from being separated from the first telescopic shaft 10 to influence the buffering (the inner diameter of the second spring 4 is the same as the outer diameter of the first telescopic shaft 10, and if the second spring 4 is separated from the first telescopic shaft 10, the second spring is not easy to self-nest on the first telescopic shaft 10 again); further, the end of the second spring 4 close to the second fixing post 20 can be fixed on the second fixing post 2.
As shown in fig. 4, the end of the second telescopic shaft 20 far from the second fixed column 2 is fixedly provided with a sliding column 21 sliding in the telescopic hole 11, the outer diameter of the sliding column 21 is the same as the inner diameter of the telescopic hole 11 and is larger than the outer diameter of the second telescopic shaft 20, the end of the first telescopic shaft 10 far from the first fixed column 1 is provided with a baffle ring 12, the inner diameter of the baffle ring 12 is the same as the outer diameter of the second telescopic shaft 20, and the baffle ring 12 is fixed on the first telescopic shaft 10 through a fixing bolt 121.
Furthermore, a plurality of through grooves 211 uniformly distributed along the circumferential direction are formed in the outer circumferential wall of the strut 21 and the inner circumferential wall of the retainer ring 12, the strut 21 divides the telescopic hole 11 into a forward buffer area 111 and a reverse buffer area 112 (in this embodiment, since the electric vehicle is mainly subjected to pressure, it is specified that the first spring 3 is in the forward direction when compressed and the first spring 3 is in the reverse direction when stretched), when the first telescopic shaft 10 and the second telescopic shaft 20 move in the opposite direction, the volume corresponding to the forward buffer area 111 decreases, and the volume corresponding to the reverse buffer area 112 increases, that is, on the basis of fig. 3, the upper part of the strut 21 is the forward buffer area 111, and the lower part is the reverse buffer area 112; when the spring device is in a natural state (i.e. when the first spring 3 and the second spring 4 are stressed, and are in a natural length), the length of the reverse buffer area 112 is smaller than that of the forward buffer area 111; because the outer diameter of the sliding column 21 is the same as the inner diameter of the telescopic hole 11, and the inner diameter of the baffle ring 12 is the same as the outer diameter of the second telescopic shaft 20, and because of the existence of manufacturing tolerance, a small gap exists between the sliding column 21 and the telescopic hole 11, and between the second telescopic shaft 20 and the baffle ring 12, when the sliding column 21 moves, the volumes of the forward buffer area 111 and the reverse buffer area 112 change, air in the forward buffer area 111 and the reverse buffer area 112 can be compressed, and if only the small gap exists, a large resistance can be generated, so that the arrangement of the through groove 211 enables the air in the two buffer areas to circulate, and a third-stage buffer is generated.
In addition, when the electric vehicle is pressed, the second spring 4 can play a role of buffering, and if the electric vehicle is pulled, since both ends of the second spring 4 are not fixed, the second spring 4 cannot play a role of buffering, only the first spring 3 and the buffering area generate buffering, because the electric vehicle mainly bears pressure, in the actual use process, the second spring 4 is not needed to be added into the buffer when the electric vehicle is stressed, the use requirement can be met only by the buffer generated by the first spring 3 and the buffer area, in addition, in order to ensure the buffer effect, the length of the forward buffer area 111 needs to provide a certain compression space for the second spring 4, and the length of the reverse buffer area 112 needs to provide a certain tension space for the first spring 3, for example, in the embodiment, fig. 3 can be used as the initial state of the shock absorber (i.e. the first spring 3 is in a natural state).
When the shock absorber is used, the shock absorber is installed on an electric vehicle through the connecting hole 51 on the connecting lug 5, when the electric vehicle is pressed, the first spring 3 generates first-stage buffering to generate compression, the first spring 3 is continuously compressed, when the shock absorber contacts the second spring 4, the second spring 4 is supported by two fixed columns to generate second-stage buffering to generate compression, meanwhile, in the compression process of the springs, the volume of the positive and negative buffer area 111 is changed, third-stage buffering is formed by the flowing of air, and then the buffering of pressing down is completed; when the electric vehicle runs, the electric vehicle can rise when passing through an obstacle, the shock absorber generates a pulling force effect at the moment, and meanwhile, the electric vehicle rises to overcome the gravity effect (including a part of gravity of the electric vehicle and the gravity of a load on the electric vehicle), so that the buffering effect of the first spring 3 and the buffering area is combined with the gravity effect at the moment, and the buffering effect of the second spring 4 is lacked, so that the buffering effect on the pulled force of the electric vehicle can be realized.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. The shock absorber for the electric vehicle is characterized by comprising a first fixing column and a second fixing column which are coaxially arranged, wherein the first fixing column and the second fixing column are same in size and structure, a first telescopic shaft is coaxially and fixedly arranged on the first fixing column, and a second telescopic shaft is coaxially and fixedly arranged on the second fixing column; the second telescopic shaft is arranged on the first telescopic shaft in a telescopic manner through a spring device, a telescopic hole for the second telescopic shaft to stretch is formed in the first telescopic shaft, and the first telescopic shaft and the second telescopic shaft are coaxial; the spring device comprises a first spring and a second spring which are coaxially arranged.
2. The damper for an electric vehicle as claimed in claim 1, wherein the stiffness of said second spring is greater than the stiffness of said first spring, and the direction of the corresponding spiral of said first spring is opposite to the direction of the corresponding spiral of said second spring; the length of the first spring is greater than that of the second spring, and the length of the second spring is greater than that of the second telescopic shaft.
3. The shock absorber for the electric vehicle as claimed in claim 2, wherein both ends of the first spring are respectively fixedly arranged on the first fixing column and the second fixing column, and the first spring is nested on the second spring; the inner diameter of the first spring is larger than the outer diameter of the second spring, the inner diameter of the second spring is the same as the outer diameter of the first telescopic shaft, and the outer diameter of the second spring is smaller than the outer diameter of the first fixing column.
4. The damper for the electric vehicle as claimed in claim 2 or 3, wherein a sliding column sliding in the telescopic hole is fixedly arranged at an end part of the second telescopic shaft far away from the second fixed column, an outer diameter of the sliding column is the same as an inner diameter of the telescopic hole and is larger than an outer diameter of the second telescopic shaft, a stop ring is arranged at an end part of the first telescopic shaft far away from the first fixed column, and an inner diameter of the stop ring is the same as an outer diameter of the second telescopic shaft.
5. The damper for electric vehicles according to claim 4, wherein the outer peripheral wall of the strut and the inner peripheral wall of the retainer ring are provided with a plurality of through grooves uniformly distributed in the circumferential direction.
6. The damper for electric vehicles according to claim 5, wherein the strut divides the telescopic hole into a forward buffer area and a reverse buffer area, and when the first telescopic shaft and the second telescopic shaft move in opposite directions, the volume of the forward buffer area becomes smaller and the volume of the reverse buffer area becomes larger; when the spring device is in a natural state, the length of the reverse buffer area is smaller than that of the forward buffer area.
7. The shock absorber for the electric vehicle as claimed in claim 6, wherein the first fixing column and the second fixing column are both fixedly provided with a connecting lug, and the connecting lug is provided with a connecting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920468634.8U CN209977126U (en) | 2019-04-09 | 2019-04-09 | Shock absorber for electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920468634.8U CN209977126U (en) | 2019-04-09 | 2019-04-09 | Shock absorber for electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209977126U true CN209977126U (en) | 2020-01-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920468634.8U Active CN209977126U (en) | 2019-04-09 | 2019-04-09 | Shock absorber for electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209977126U (en) |
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2019
- 2019-04-09 CN CN201920468634.8U patent/CN209977126U/en active Active
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