CN111396495A - Shock absorber and commercial car suspension - Google Patents
Shock absorber and commercial car suspension Download PDFInfo
- Publication number
- CN111396495A CN111396495A CN202010217285.XA CN202010217285A CN111396495A CN 111396495 A CN111396495 A CN 111396495A CN 202010217285 A CN202010217285 A CN 202010217285A CN 111396495 A CN111396495 A CN 111396495A
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- CN
- China
- Prior art keywords
- piston rod
- shock absorber
- groove
- cylinder body
- displacement sensor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3292—Sensor arrangements
Abstract
The invention relates to the technical field of automobile shock absorbers and discloses a shock absorber and a commercial vehicle suspension. The shock absorber comprises a magnetostrictive displacement sensor, a cylinder body and a piston rod capable of axially stretching along the cylinder body, the magnetostrictive displacement sensor comprises a waveguide tube and a vernier magnetic ring capable of axially moving along the waveguide tube, a groove for accommodating the waveguide tube is formed in the axial direction of the piston rod, the waveguide tube is installed in the groove, and the vernier magnetic ring is sleeved on the periphery of the piston rod and is fixedly arranged relative to the cylinder body. Through setting up displacement sensor on the bumper shock absorber for the telescopic length of piston rod can be measured in real time to the bumper shock absorber, and the telescopic length of piston rod is the most direct, the truest reflection of road surface condition, consequently, can be used for as the foundation of judging the road surface condition, thereby has reduced the complexity and the cost of sensor, and has improved the precision that detects.
Description
Technical Field
The invention relates to the technical field of automobile shock absorbers, in particular to a shock absorber and a commercial vehicle suspension.
Background
The shock absorber is mainly used for inhibiting the shock generated when a spring absorbs the shock and rebounds and the shock from the road surface, and the working principle is that when the relative motion occurs due to the shock between a vehicle frame (or a vehicle body) and a vehicle axle, a piston in the shock absorber moves up and down, and oil in a shock absorber cavity repeatedly flows into another cavity from one cavity through different pores. At the moment, the friction between the hole wall and the oil and the internal friction between oil molecules form damping force on vibration, so that the vibration energy of the automobile is converted into oil heat energy, and then the oil heat energy is absorbed by the shock absorber and is emitted into the atmosphere. When the cross section and other factors of the oil passage are not changed, the damping force is increased and decreased along with the relative movement speed between the vehicle frame and the vehicle axle (or the vehicle wheel) and is related to the viscosity of the oil. The damping force is too small, the vehicle body jumps up and down, and the too large damping force brings too large resistance, so that the normal work of the spring is hindered, and the comfort is influenced. Especially commercial car, because the dead weight is great, so when commercial car traveles in pothole road surface or carries out the rapid deceleration, the bumper shock absorber of commercial car flexible range is great to lead to passenger's comfort relatively poor.
When the cross section and other factors of the oil passage are not changed, the damping force is increased and decreased along with the relative movement speed between the vehicle frame and the vehicle axle (or the vehicle wheel) and is related to the viscosity of the oil. The damping force is too small, the vehicle body jumps up and down, and the too large damping force brings too large resistance, so that the normal work of the spring is hindered, and the comfort is influenced. Especially commercial car, because the dead weight is great, so when commercial car traveles in pothole road surface or carries out the rapid deceleration, the bumper shock absorber of commercial car flexible range is great to lead to passenger's comfort relatively poor.
The existing variable damping shock absorber needs to work together with a sensor for detecting the road condition, on one hand, the control program of the sensor for detecting the road condition is complex, the debugging and using cost is high, the sensor cannot be widely used on an ordinary automobile, and on the other hand, the sensor has certain error and delay in the judgment of the road condition, so that the adjusting effect is not ideal.
Disclosure of Invention
The invention aims to provide a shock absorber and a commercial vehicle suspension, wherein the shock absorber can directly detect the telescopic length of a piston rod in real time and can be used as a basis for judging road conditions.
In order to achieve the above object, in one aspect, the present invention provides a shock absorber, where the shock absorber includes a magnetostrictive displacement sensor, a cylinder, and a piston rod capable of axially extending and retracting along the cylinder, the magnetostrictive displacement sensor includes a waveguide tube and a cursor magnetic ring capable of axially moving along the waveguide tube, a groove for accommodating the waveguide tube is axially disposed on the piston rod, the waveguide tube is installed in the groove, and the cursor magnetic ring is sleeved on the periphery of the piston rod and is fixedly disposed relative to the cylinder.
Further, the bumper shock absorber includes the cylinder cap, the cylinder cap with the open end sealing connection of cylinder body, be equipped with the piston rod hole on the cylinder cap, the piston rod runs through the piston rod hole and with piston rod hole sealing connection, the vernier magnetic ring sets up on the cylinder cap.
Furthermore, the vernier magnetic ring is arranged at one end, far away from the cylinder body, of the cylinder cover.
Furthermore, a vernier magnetic ring groove is formed in the end face, far away from one end of the cylinder body, of the cylinder cover, and the vernier magnetic ring is installed in the vernier magnetic ring groove.
Further, the groove is formed in the end face of one end, far away from the cylinder body, of the piston rod.
Further, the groove is disposed near a side surface of the piston rod.
Further, the groove is formed in the side face of the piston rod, a sealing sleeve is sleeved on the periphery of the piston rod, and the sealing sleeve covers the opening end of the groove and is connected with the piston rod in a sealing mode.
On the other hand, the invention also provides a commercial vehicle suspension, which comprises the shock absorber and a controller electrically connected with the magnetostrictive displacement sensor, wherein the shock absorber is a variable damping shock absorber, and the magnetostrictive displacement sensor transmits the telescopic length of the piston rod to the controller, so that the controller controls the damping of the shock absorber.
Further, the commercial vehicle suspension comprises four shock absorbers, and two ends of the four shock absorbers are connected with the wheels and the vehicle frame respectively.
Further, the damper is configured as a magnetorheological damper.
The shock absorber adopting the technical scheme of the invention has the following effects:
the displacement sensor is arranged on the shock absorber, so that the shock absorber can measure the telescopic length of the piston rod in real time, and the telescopic length of the piston rod is the most direct and real reflection of the road condition, so that the telescopic length can be used as a basis for judging the road condition, the complexity and the cost of the sensor are reduced, and the detection accuracy is improved; by adopting the magnetostrictive displacement sensor, the vernier magnetic ring can not be directly contacted with the waveguide tube, and can adapt to the complex environment at the bottom of the automobile, so that the detection precision is improved, and the service life of the magnetostrictive displacement sensor is prolonged; through with the cursor magnetic ring relative cylinder body fixed setting, utilize the piston rod to drive the waveguide motion to the realization is to the measurement of piston pipe flexible length, installs the waveguide in the recess of piston rod, is favorable to protecting the waveguide not damaged.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
FIG. 1 is a cross-sectional view of one embodiment of the shock absorber of the present invention;
FIG. 2 is a cross-sectional view of another embodiment of the shock absorber of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 1;
fig. 4 is an enlarged view of a portion B in fig. 2.
Description of the reference numerals
1 magnetostrictive displacement sensor 2 cylinder
3 piston rod 4 cylinder cover
5 sealing sleeve 11 waveguide
12 vernier magnetic ring 31 groove
41 vernier magnetic ring groove
Detailed Description
The following describes the embodiments of the present invention in detail. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration and explanation only and are not intended to limit the invention.
In the present invention, the use of the terms of orientation such as "upper and lower" in the case where no description is made to the contrary generally means the orientation in the assembled and used state. "inner and outer" refer to the inner and outer contours of the respective component itself.
The first aspect of the present invention provides a shock absorber, as shown in fig. 1 to 4, the shock absorber includes a magnetostrictive displacement sensor 1, a cylinder 2, and a piston rod 3 capable of axially extending and retracting along the cylinder 2, the magnetostrictive displacement sensor 1 includes a waveguide 11 and a cursor magnetic ring 12 capable of axially moving along the waveguide 11, a waveguide line is disposed in the waveguide 11, the waveguide line is capable of transmitting a current pulse, and a circumferential magnetic field is formed at an outer periphery of the waveguide 11, a groove 31 for accommodating the waveguide 11 is disposed in an axial direction of the piston rod 3, the waveguide 11 is mounted in the groove 31, and the cursor magnetic ring 12 is sleeved on an outer periphery of the piston rod 3 and is fixedly disposed relative to the cylinder 2.
The displacement sensor is arranged on the shock absorber, so that the shock absorber can measure the telescopic length of the piston rod 3 in real time, and the telescopic length of the piston rod 3 is the most direct and real reflection of the road condition, so that the telescopic length can be used as a basis for judging the road condition, the complexity and the cost of the sensor are reduced, and the detection accuracy is improved; by adopting the magnetostrictive displacement sensor 1, the vernier magnetic ring 12 can not be directly contacted with the waveguide tube 11, and can adapt to the complex environment at the bottom of an automobile, so that the detection precision is improved, and the service life of the magnetostrictive displacement sensor 1 is prolonged; through setting up vernier magnetic ring 12 is fixed relative to cylinder body 2, utilize piston rod 3 to drive waveguide 11 motion to realize the measurement to piston tube telescopic length, install waveguide 11 in the recess 31 of piston rod 3, be favorable to protecting waveguide 11 not damaged.
Further, the bumper shock absorber includes cylinder cap 4, cylinder cap 4 with the open end sealing connection of cylinder body 2, be equipped with 3 holes on the cylinder cap 4, piston rod 3 runs through 3 holes of piston rod and with 3 hole sealing connection of piston rod, vernier magnetic ring 12 sets up on the cylinder cap 4. This arrangement allows the magnetostrictive displacement sensor 1 to detect the length of extension and contraction of the piston rod 3 while extending and contracting in the piston hole of the piston rod 3.
In the above, in order to facilitate the installation and replacement of the vernier magnetic ring 12, the vernier magnetic ring 12 is disposed at one end of the cylinder head 4 far away from the cylinder body 2. The arrangement enables the vernier magnetic ring 12 to be arranged outside the shock absorber, so that the installation and replacement of the vernier magnetic ring 12 are facilitated, and further, the vernier magnetic ring 12 is detachably connected with the cylinder cover 4.
In order to avoid the cursor magnetic ring 12 from being damaged, a cursor magnetic ring groove 41 is formed in the end face, away from one end of the cylinder body 2, of the cylinder cover 4, and the cursor magnetic ring 12 is installed in the cursor magnetic ring groove 41. Furthermore, a protective cover is installed at one end, far away from the cylinder cover 4, of the cursor magnetic ring 12, and the protective cover is detachably connected with the cylinder body 2.
As shown in fig. 1 and 3, according to an embodiment of the present invention, the groove 31 is provided on an end surface of the piston rod 3 at an end far from the cylinder 2, the groove 31 is a hole extending in an axial direction of the piston rod 3, one end of the waveguide 11 is inserted into the groove 31, and the other end is fixed with respect to the piston rod 3.
In the above, in order to avoid the interference of the piston rod 3 on the magnetic field of the waveguide tube 11, the groove 31 is disposed close to the side surface of the piston rod 3, and the groove 31 and the piston rod 3 are eccentrically disposed, so that the waveguide tube 11 is closer to the circumferential surface of the piston rod 3, and the interference of the piston rod 3 on the magnetic field of the waveguide tube 11 is reduced.
As shown in fig. 2 and 4, according to another embodiment of the present invention, the groove 31 is disposed on a side surface of the piston rod 3, the groove 31 extends in a radial direction of the piston rod 3, the outer periphery of the piston rod 3 is sleeved with the sealing sleeve 5, and the sealing sleeve 5 covers an open end of the groove 31 and is connected with the piston rod 3 in a sealing manner, which is also beneficial to reducing interference of the piston rod 3 on the magnetic field of the waveguide 11.
The invention provides a commercial vehicle suspension, which comprises the shock absorber and a controller electrically connected with the magnetostrictive displacement sensor 1, wherein the shock absorber is a variable damping shock absorber, the magnetostrictive displacement sensor 1 is electrically connected with the controller to transmit the telescopic length of the piston rod 3 to the controller, and therefore the controller controls the damping of the shock absorber. Because commercial car dead weight is great, so when commercial car went on pothole road surface or carried out the rapid deceleration, the flexible range of bumper shock absorber of commercial car is great to lead to the passenger comfort relatively poor. After the magnetostrictive displacement sensor 1 transmits the telescopic length of the shock absorber to the controller, the controller can control the damping size of the shock absorber, so that the telescopic length of the shock absorber is adjusted, and the customer experience is improved.
Further, the commercial vehicle suspension comprises four shock absorbers, and two ends of the four shock absorbers are connected with the wheels and the vehicle frame respectively. Such setting makes the frame four position all can effectual support or shock attenuation to improve the holistic comfort level of commercial car.
In the above, in order to facilitate the adjustment of the damping of the shock absorber, the shock absorber is configured as a magnetorheological shock absorber.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are included in the scope of protection of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of various embodiments of the invention can be made, and the invention should be regarded as the disclosure of the invention as long as the combination does not depart from the idea of the invention.
Claims (10)
1. The shock absorber is characterized by comprising a magnetostrictive displacement sensor (1), a cylinder body (2) and a piston rod (3) capable of axially stretching and retracting along the cylinder body (2), wherein the magnetostrictive displacement sensor (1) comprises a waveguide tube (11) and a vernier magnetic ring (12) capable of axially moving along the waveguide tube (11), a groove (31) for accommodating the waveguide tube (11) is formed in the axial direction of the piston rod (3), the waveguide tube (11) is installed in the groove (31), and the vernier magnetic ring (12) is sleeved on the periphery of the piston rod (3) and is opposite to the periphery of the cylinder body (2).
2. The shock absorber as claimed in claim 1, wherein the shock absorber comprises a cylinder cover (4), the cylinder cover (4) is connected with the open end of the cylinder body (2) in a sealing manner, a piston rod (3) hole is formed in the cylinder cover (4), the piston rod (3) penetrates through the piston rod (3) hole and is connected with the piston rod (3) hole in a sealing manner, and the vernier magnetic ring (12) is arranged on the cylinder cover (4).
3. The shock absorber as claimed in claim 2, characterized in that the cursor magnetic ring (12) is arranged at the end of the cylinder head (4) remote from the cylinder body (2).
4. The shock absorber as claimed in claim 3, wherein a vernier magnet ring groove (41) is formed in an end face of the cylinder cover (4) far away from the cylinder body (2), and the vernier magnet ring (12) is installed in the vernier magnet ring groove (41).
5. Shock absorber according to claim 1, wherein said groove (31) is provided on the end surface of the end of the piston rod (3) remote from the cylinder (2).
6. Shock absorber according to claim 5, wherein said groove (31) is provided close to the side of said piston rod (3).
7. The shock absorber according to claim 1, wherein the groove (31) is provided on a side surface of the piston rod (3), a sealing sleeve (5) is sleeved on an outer circumference of the piston rod (3), and the sealing sleeve (5) covers an open end of the groove (31) and is connected with the piston rod (3) in a sealing manner.
8. A commercial vehicle suspension, characterized in that it comprises a shock absorber according to any one of claims 1 to 8, which is a variable damping shock absorber, and a controller electrically connected to the magnetostrictive displacement sensor (1), the magnetostrictive displacement sensor (1) transmitting the telescopic length of the piston rod (3) to the controller, so that the controller controls the damping magnitude of the shock absorber.
9. The commercial vehicle suspension according to claim 8, wherein said suspension comprises four said shock absorbers, the two ends of said four shock absorbers being connected to the wheel and the frame, respectively.
10. A commercial vehicle suspension according to claim 8, characterised in that the damper is arranged as a magnetorheological damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010217285.XA CN111396495A (en) | 2020-03-25 | 2020-03-25 | Shock absorber and commercial car suspension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010217285.XA CN111396495A (en) | 2020-03-25 | 2020-03-25 | Shock absorber and commercial car suspension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111396495A true CN111396495A (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010217285.XA Pending CN111396495A (en) | 2020-03-25 | 2020-03-25 | Shock absorber and commercial car suspension |
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| Country | Link |
|---|---|
| CN (1) | CN111396495A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4244204A1 (en) * | 1992-12-24 | 1994-06-30 | Bosch Gmbh Robert | Displacement measurement system for shock absorber cushioning stroke |
| CN102808886A (en) * | 2011-05-31 | 2012-12-05 | 日立汽车系统株式会社 | Shock absorber and suspension apparatus |
| CN103883663A (en) * | 2012-12-20 | 2014-06-25 | 北汽福田汽车股份有限公司 | Damper, vibration damping control system and automobile |
| CN203756649U (en) * | 2014-04-01 | 2014-08-06 | 上海东机液压工程有限公司 | Displacement measurement device for hydraulic cylinder |
| CN108680092A (en) * | 2018-04-27 | 2018-10-19 | 中国计量大学 | A kind of ferrite magnetostrictive displacement sensor |
-
2020
- 2020-03-25 CN CN202010217285.XA patent/CN111396495A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4244204A1 (en) * | 1992-12-24 | 1994-06-30 | Bosch Gmbh Robert | Displacement measurement system for shock absorber cushioning stroke |
| CN102808886A (en) * | 2011-05-31 | 2012-12-05 | 日立汽车系统株式会社 | Shock absorber and suspension apparatus |
| CN103883663A (en) * | 2012-12-20 | 2014-06-25 | 北汽福田汽车股份有限公司 | Damper, vibration damping control system and automobile |
| CN203756649U (en) * | 2014-04-01 | 2014-08-06 | 上海东机液压工程有限公司 | Displacement measurement device for hydraulic cylinder |
| CN108680092A (en) * | 2018-04-27 | 2018-10-19 | 中国计量大学 | A kind of ferrite magnetostrictive displacement sensor |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200710 |
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| RJ01 | Rejection of invention patent application after publication |