CN110588618A - Load sensor for hydraulic vehicle - Google Patents
Load sensor for hydraulic vehicle Download PDFInfo
- Publication number
- CN110588618A CN110588618A CN201910895068.3A CN201910895068A CN110588618A CN 110588618 A CN110588618 A CN 110588618A CN 201910895068 A CN201910895068 A CN 201910895068A CN 110588618 A CN110588618 A CN 110588618A
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- CN
- China
- Prior art keywords
- hydraulic
- hydraulic cylinder
- rod
- cylinder
- reference block
- Prior art date
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/021—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles having electrical weight-sensitive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/03—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing during motion
- G01G19/035—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing during motion using electrical weight-sensitive devices
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to the technical field of sensors and discloses a hydraulic vehicle load sensor which comprises a leaf spring, a first hydraulic cylinder and a first hydraulic rod, wherein the leaf spring is movably connected with the first hydraulic cylinder through the first hydraulic rod, and the first hydraulic cylinder bears all pressure of the leaf spring through the first hydraulic rod. According to the hydraulic vehicle load sensor, the load of an automobile is indirectly detected through the liquid level changes in the first hydraulic cylinder and the second hydraulic cylinder, in the process, adverse interference is eliminated, the measurement precision is improved, meanwhile, the influence of external interference on the measurement result is small, the influence of long-term non-zero calibration on the measurement result is also small, secondly, the first hydraulic cylinder and the second hydraulic cylinder incline to the same angle, when in calculation, the component force towards the axis is multiplied by the same trigonometric function value, the final calculation result is not influenced, the load measurement when the automobile goes up and down the slope is more accurate, and the normal work of the ABS is further ensured.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a load sensor of a hydraulic vehicle.
Background
The vehicle load sensor is mainly used for detecting vehicle load and converting the detected load amount into corresponding electric signals to be transmitted to a corresponding control device of a brake system of the automobile, such as an ABS controller and the like, so that the braking force of the front wheel and the rear wheel during the braking of the automobile can be timely adjusted, and the safety and the reliability of braking are improved.
Referring to fig. 1, a pressure sensor measures oil pressure in real time to obtain an actual vehicle load, but since the vehicle is used continuously, frequent zero calibration cannot be performed on the vehicle, a detection result may have a large error, and on the other hand, the density of hydraulic oil is greatly affected by temperature, and a phenomenon of expansion with heat and contraction with cold is significant, and when the hydraulic oil expands or contracts, pressure is applied to a hydraulic rod and a spring, so that the spring elastically deforms, and a measurement result of the pressure sensor is affected.
On the other hand, since the pressure of the vehicle body is transmitted through the hydraulic rod, when the vehicle goes up and down a slope, the load of the front and rear wheels of the vehicle is greatly influenced, at the moment, the hydraulic rod inevitably inclines due to the inclination of the vehicle body, and a considerable part of the pressure is born by the cylinder body, so that the load detection result is seriously interfered, and the ABS controller obtains wrong information and further misjudgment occurs.
Disclosure of Invention
In view of the above-mentioned shortcomings of the background art, the present invention provides a hydraulic vehicle load sensor, which has the advantage of less detection interference and solves the problems of the background art.
The invention provides the following technical scheme: a hydraulic vehicle load sensor comprises a leaf spring, a first hydraulic cylinder and a first hydraulic rod, wherein the leaf spring is movably connected with the first hydraulic cylinder through the first hydraulic rod, the first hydraulic cylinder bears all pressure of the leaf spring through the first hydraulic rod, the first hydraulic rod is communicated with a second hydraulic cylinder through a communicating channel, a second hydraulic rod is arranged in the second hydraulic cylinder, and the upper end of the second hydraulic rod is fixedly connected with a reference block;
and the reference block and the first hydraulic cylinder are both connected with sliding resistors for detecting liquid level changes.
Preferably, the first hydraulic cylinder, the communication passage and the second hydraulic cylinder are located on a straight line, and the straight line is horizontal to the vehicle wheel shaft.
Preferably, the second hydraulic cylinder and the reference block have a diameter smaller than the diameter of the first hydraulic cylinder and the diameter of the first hydraulic rod, and the reference block is located outside the second hydraulic cylinder.
Preferably, a rubber sleeve is arranged between the reference block and the second hydraulic cylinder, and a limiting clamping block is arranged at the bottom of the second hydraulic cylinder.
The invention has the following beneficial effects:
1. according to the hydraulic vehicle load sensor, the load of an automobile is indirectly detected through the liquid level changes in the first hydraulic cylinder and the second hydraulic cylinder, in the process, adverse interference is discharged, the measurement precision is improved, meanwhile, the influence of external interference on the measurement result is small, and the influence of long-term non-zero calibration on the measurement result is small.
2. According to the hydraulic vehicle load sensor, the first hydraulic cylinder and the second hydraulic cylinder incline at the same angle, and when the hydraulic vehicle load sensor is used for calculating, the component force towards the axis is multiplied by the same trigonometric function value, so that the final calculation result is not influenced, the load measurement is more accurate when an automobile ascends and descends, and the normal work of the ABS is further ensured.
Drawings
FIG. 1 is a schematic diagram of a prior art configuration of the present invention;
FIG. 2 is a schematic structural view of the present invention;
fig. 3 is a partial structural schematic diagram of the present invention.
In the figure: 1. a leaf spring; 2. a first hydraulic cylinder; 3. a first hydraulic lever; 4. a communication channel; 5. a second hydraulic cylinder; 6. a second hydraulic rod; 7. refer to a block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2-3, a hydraulic vehicle load sensor includes a leaf spring 1, a first hydraulic cylinder 2 and a first hydraulic rod 3, the leaf spring 1 is a component of the vehicle itself, the first hydraulic cylinder 2 is installed on a spring base of the axle, the first hydraulic cylinder 2 bears all pressure of the leaf spring 1 through the first hydraulic rod 3, the first hydraulic rod 3 is communicated with a second hydraulic cylinder 5 through a communicating channel 4, the pressure of the first hydraulic cylinder 2 is transmitted to the second hydraulic cylinder 5 through the communicating channel 4, a second hydraulic rod 6 is arranged in the second hydraulic cylinder 5, the upper end of the second hydraulic rod 6 is fixedly connected with a reference block 7, and under the gravity action of the reference block 7, the liquid level in the second hydraulic cylinder 5 and the liquid level of the first hydraulic cylinder 2 are balanced;
the reference block 7 and the first hydraulic cylinder 2 are both connected with sliding resistors, the height change of the reference block 7 and the first hydraulic cylinder 2 is measured through the change of the resistors, the pressure generated by the first hydraulic rod 3 is measured through the height change of the reference block 7 and the first hydraulic cylinder 2, and the automobile load is indirectly measured. .
The first hydraulic cylinder 2, the communicating channel 4 and the second hydraulic cylinder 5 are positioned on a straight line, the straight line is horizontal to an automobile wheel shaft, and the straight line is vertical to the advancing direction, so that when an automobile goes up and down a slope, the inclination angles of the first hydraulic rod 3 and the second hydraulic cylinder 5 are kept consistent, and the influence on automobile load measurement when an automobile body inclines is reduced.
Wherein, the diameters of the second hydraulic cylinder 5 and the reference block 7 are smaller than the diameters of the first hydraulic cylinder 2 and the first hydraulic rod 3, the reference block 7 is positioned outside the second hydraulic cylinder 5, and the diameter ratio of the two is matched with the weight ratio of the automobile load to the reference block 7.
Wherein, refer to and be equipped with the gum cover between piece 7 and the second pneumatic cylinder 5, the bottom of second pneumatic rod 6 is equipped with spacing fixture block, reduces to refer to piece 7 and receives the influence of jolting and avoid referring to piece 7 roll-off simultaneously.
The working principle of the invention is as follows:
when the automobile is at rest and empty, the gravity of the automobile is transmitted to the hydraulic fluid through the first hydraulic rod 3, the first hydraulic cylinder 2 and the second hydraulic cylinder 5 have different cross sections, and form a balanced state with the hydraulic fluid of the second hydraulic cylinder 5 under the action of the gravity of the reference block 7, when the automobile load is increased, the pressure of the first hydraulic rod 3 is increased, the liquid level height in the reference block 7 is changed, because the mass of the reference block 7 and the cross sections of the first hydraulic cylinder 2 and the second hydraulic cylinder 5 are determined, the pressure of the first hydraulic rod 3, namely the load of the automobile, can be calculated through the liquid level changes of the first hydraulic cylinder 2 and the second hydraulic cylinder 5, when the automobile is on an up-down slope, the inclined angles of the first hydraulic rod 3 and the second hydraulic cylinder 5 are the same, and therefore the component forces in the axial direction are multiplied by the same trigonometric function, and the calculation result is not influenced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a hydraulic vehicle load sensor, includes leaf spring (1), first pneumatic cylinder (2) and first hydraulic stem (3), leaf spring (1) is through first hydraulic stem (3) and first pneumatic cylinder (2) swing joint, its characterized in that: the first hydraulic cylinder (2) bears all pressure of the steel plate spring (1) through a first hydraulic rod (3), the first hydraulic rod (3) is communicated with a second hydraulic cylinder (5) through a communication channel (4), a second hydraulic rod (6) is arranged in the second hydraulic cylinder (5), and the upper end of the second hydraulic rod (6) is fixedly connected with a reference block (7);
and the reference block (7) and the first hydraulic cylinder (2) are both connected with sliding resistors for detecting liquid level changes.
2. A hydraulic vehicle load cell as defined in claim 1, wherein: the first hydraulic cylinder (2), the communication channel (4) and the second hydraulic cylinder (5) are located on a straight line, and the straight line is horizontal to an automobile wheel shaft.
3. A hydraulic vehicle load cell as defined in claim 1, wherein: the diameters of the second hydraulic cylinder (5) and the reference block (7) are smaller than the diameters of the first hydraulic cylinder (2) and the first hydraulic rod (3), and the reference block (7) is located on the outer side of the second hydraulic cylinder (5).
4. A hydraulic vehicle load cell as defined in claim 1, wherein: a rubber sleeve is arranged between the reference block (7) and the second hydraulic cylinder (5), and a limiting clamping block is arranged at the bottom of the second hydraulic rod (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910895068.3A CN110588618A (en) | 2019-09-20 | 2019-09-20 | Load sensor for hydraulic vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910895068.3A CN110588618A (en) | 2019-09-20 | 2019-09-20 | Load sensor for hydraulic vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110588618A true CN110588618A (en) | 2019-12-20 |
Family
ID=68861923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910895068.3A Withdrawn CN110588618A (en) | 2019-09-20 | 2019-09-20 | Load sensor for hydraulic vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110588618A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1288886A (en) * | 1970-01-22 | 1972-09-13 | ||
| CN2050160U (en) * | 1988-12-05 | 1989-12-27 | 刘洛 | Vehicle carrying capacity electric liquid weight instrument |
| CN2105056U (en) * | 1991-09-03 | 1992-05-20 | 陈忠义 | Liquid scale |
| CN2277066Y (en) * | 1996-05-03 | 1998-03-25 | 方乾达 | Lorry weight-measuring instrument |
| CN103171481A (en) * | 2011-12-20 | 2013-06-26 | 陕西银星科技有限公司 | Load capacity self-measuring transducer of freight vehicle |
| CN103868574A (en) * | 2012-12-11 | 2014-06-18 | 江苏技术师范学院 | Hydraulic vehicle load sensor |
-
2019
- 2019-09-20 CN CN201910895068.3A patent/CN110588618A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1288886A (en) * | 1970-01-22 | 1972-09-13 | ||
| CN2050160U (en) * | 1988-12-05 | 1989-12-27 | 刘洛 | Vehicle carrying capacity electric liquid weight instrument |
| CN2105056U (en) * | 1991-09-03 | 1992-05-20 | 陈忠义 | Liquid scale |
| CN2277066Y (en) * | 1996-05-03 | 1998-03-25 | 方乾达 | Lorry weight-measuring instrument |
| CN103171481A (en) * | 2011-12-20 | 2013-06-26 | 陕西银星科技有限公司 | Load capacity self-measuring transducer of freight vehicle |
| CN103868574A (en) * | 2012-12-11 | 2014-06-18 | 江苏技术师范学院 | Hydraulic vehicle load sensor |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191220 |
|
| WW01 | Invention patent application withdrawn after publication |