CN211918629U - Support leg device and working machine - Google Patents
Support leg device and working machine Download PDFInfo
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- CN211918629U CN211918629U CN201922376975.5U CN201922376975U CN211918629U CN 211918629 U CN211918629 U CN 211918629U CN 201922376975 U CN201922376975 U CN 201922376975U CN 211918629 U CN211918629 U CN 211918629U
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Abstract
The utility model provides a landing leg device and operation machinery relates to mechanical equipment technical field. The landing leg device comprises a horizontal landing leg and a vertical landing leg, one end of the horizontal landing leg is used for being connected to a vehicle body of the operation machine, the other end of the horizontal landing leg is connected to the vertical landing leg, the landing leg device further comprises a strain sensor, the strain sensor is arranged on a horizontal plane where the horizontal landing leg and a central axis of the horizontal landing leg deviate, and the strain sensor is used for detecting the stress state of the horizontal landing leg so as to detect the supporting state of the vertical landing leg. The operation machine comprises a controller, a vehicle body and the support leg device, wherein the vehicle body is provided with an arm support, the controller is electrically connected with the strain sensor, and the controller is used for judging the supporting state of the vertical support leg according to a stress detection signal sent by the strain sensor and controlling the action of the arm support according to the supporting state of the vertical support leg. The landing leg device and the landing leg ground-off detection of the operation machine are more sensitive and reliable, and the safety during operation can be ensured.
Description
Technical Field
The utility model relates to a mechanical equipment technical field particularly, relates to a landing leg device and operation machinery.
Background
Fire engines and other machines are typically provided with a plurality of legs that support the vehicle body during operation to maintain the balance of the vehicle body. When the arm support on the fire fighting truck rotates to the maximum extent, the outriggers may come off the ground, causing the truck body to roll over. In order to prevent the vehicle body from tipping over, a supporting leg detection device with a displacement sensor is usually arranged at a supporting leg plate, and whether the supporting leg is lifted off the ground is detected through displacement change to give an early warning, however, the detection result is not reliable enough, and the safety of the working machine during working is difficult to ensure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a landing leg device and operation machinery, its landing leg liftoff detection is sensitive reliable more, security when guaranteeing the operation.
The embodiment of the utility model is realized like this:
the embodiment provides a landing leg device, including horizontal landing leg and vertical leg, the one end of horizontal landing leg is used for connecting in the automobile body of operation machinery, and the other end is connected in the vertical leg, still includes strain sensor, and strain sensor sets up in the horizontal landing leg and the horizontal plane that deviates from the central axis place of horizontal landing leg, and strain sensor is used for detecting the stress state of horizontal landing leg in order to detect the support state of vertical leg.
In an optional embodiment, the horizontal supporting leg comprises a supporting leg box and a telescopic leg, the supporting leg box is used for being connected to the vehicle body, one end of the telescopic leg is contained in the supporting leg box, the telescopic leg can stretch and retract relative to the supporting leg box, the other end of the telescopic leg is connected to the vertical supporting leg, and the strain sensor is arranged on the telescopic leg.
In an alternative embodiment, the distance between the strain sensor and the vertical leg is no greater than 1/4 the length of the telescoping leg.
In an alternative embodiment, the telescoping leg is hollow inside and the strain sensor is encapsulated in an encapsulation that is attached to the inner wall of the telescoping leg.
In an alternative embodiment, the package and the telescoping legs are made of the same material.
In an optional embodiment, the horizontal supporting leg comprises a supporting leg box and a telescopic leg, the supporting leg box is used for being connected to the vehicle body, one end of the telescopic leg is contained in the supporting leg box, the telescopic leg can stretch out and draw back relative to the supporting leg box, the other end of the telescopic leg is connected to the vertical supporting leg, the strain sensor is arranged on the supporting leg box, and the distance between the strain sensor and one end, close to the vertical supporting leg, of the supporting leg box is not larger than the length of the telescopic leg contained in the supporting leg box.
The embodiment also provides a working machine which comprises a controller, a vehicle body and the support leg device, wherein the vehicle body is provided with an arm support, the controller is electrically connected with the strain sensor, and the controller is used for judging the supporting state of the vertical support leg according to a stress detection signal sent by the strain sensor and controlling the action of the arm support according to the supporting state of the vertical support leg.
In an optional embodiment, the strain sensor is positioned below a horizontal plane where the central axis of the horizontal leg is positioned, and when the strain sensor detects a tensile stress signal, the controller judges that the vertical leg is in a supporting state; when the strain sensor detects a pressure stress signal, the controller judges that the vertical supporting leg is in a non-supporting state.
In an optional embodiment, the strain sensor is positioned on a horizontal plane where the central axis of the horizontal supporting leg is positioned, and when the strain sensor detects a compressive stress signal, the controller judges that the vertical supporting leg is in a supporting state; when the strain sensor detects a tensile stress signal, the controller judges that the vertical supporting leg is in a non-supporting state.
In an alternative embodiment, the electrical connection between the strain sensor and the controller is routed within the horizontal leg.
The utility model discloses beneficial effect includes:
the landing leg device comprises a horizontal landing leg and a vertical landing leg, one end of the horizontal landing leg is used for being connected to a vehicle body of the operation machine, the other end of the horizontal landing leg is connected to the vertical landing leg, the landing leg device further comprises a strain sensor, the strain sensor is arranged on a horizontal plane where the horizontal landing leg and a central axis of the horizontal landing leg deviate, and the strain sensor is used for detecting the stress state of the horizontal landing leg so as to detect the supporting state of the vertical landing leg. When the vertical supporting leg is in a supporting state, the vertical supporting leg is not lifted off the ground, the vertical supporting leg is supported on the ground and has a supporting counterforce on one end of the horizontal supporting leg, the other end of the horizontal supporting leg is connected to a vehicle body, the vehicle body has gravity, so that stress (such as tensile stress) in a certain direction can be generated on the upper half part or the lower half part of a cross section, perpendicular to an axis, of the horizontal supporting leg, and a strain sensor is arranged on the horizontal supporting leg at a position deviating from a horizontal plane where the central axis of the horizontal supporting leg is located, and can detect the stress in the certain direction at the position; when the vertical supporting leg is in a non-supporting state, the vertical supporting leg is already lifted off or is about to be lifted off, the vertical supporting leg does not generate a supporting counterforce to the horizontal supporting leg any more, the vertical supporting leg is equivalent to be hung at one end of the horizontal supporting leg, the stress state of the horizontal supporting leg on the section perpendicular to the axis is changed, and the stress at the position of the strain sensor is changed into stress (such as compressive stress) opposite to the stress direction in a certain direction, so that the strain sensor can detect the difference of front and rear stress states, once the vertical supporting leg starts to be lifted off, the strain sensor can sensitively detect the supporting condition of the supporting leg according to the stress state change at the position, and then the judgment of whether the supporting. Compared with the traditional mode of detecting whether the supporting leg is off the ground or not according to the displacement state between the vertical supporting leg and the supporting leg plate, the method and the device have the advantages that misjudgment can not be caused by failure of detection results due to the fact that the supporting leg plate is clamped and the like, the reaction is sensitive, the detection results are reliable, and a foundation can be laid for timely early warning. The operation machine comprises a controller, a vehicle body and the supporting leg device, wherein the vehicle body is provided with an arm support, the controller is electrically connected with the strain sensor, the controller is used for judging the supporting state of the vertical supporting leg according to a stress detection signal sent by the strain sensor and controlling the action of the arm support according to the supporting state of the vertical supporting leg, the risk of tipping the operation machine caused by the fact that the gravity center of the arm support deviates too far from the center of the operation machine or the position of the arm support is not proper can be effectively avoided, and the safety of the operation machine during working is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of a first viewing angle of a leg support apparatus according to an embodiment of the present invention;
fig. 2 is a schematic view of a second viewing angle of the leg device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a strain sensor according to an embodiment of the present invention.
Icon: 100-a leg support device; 120-horizontal leg support; 122-leg box; 123-telescopic groove; 124-telescopic legs; 125-upper plate; 126-lower plate; 127-side plate; 130-vertical legs; 132-a foot support plate; 140-a strain sensor; 142-a package; 144-a screw; 210-vehicle body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally 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 in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 and 2, the present embodiment provides a leg device 100, which includes a horizontal leg 120 and a vertical leg 130, wherein one end of the horizontal leg 120 is used for being connected to a body 210 of a work machine, and the other end is connected to the vertical leg 130. The leg device 100 further includes a strain sensor 140, the strain sensor 140 is disposed on the horizontal leg 120 and is offset from a horizontal plane of the central axis of the horizontal leg 120, and the strain sensor 140 is used for detecting a stress state of the horizontal leg 120 to detect a support state of the vertical leg 130.
The horizontal leg 120 includes a leg box 122 and a telescopic leg 124, the leg box 122 is used for being connected to the vehicle body 210, one end of the telescopic leg 124 is accommodated in the leg box 122, the telescopic leg 124 can be telescopic relative to the leg box 122, and the other end of the telescopic leg 124 is connected to the vertical leg 130. Specifically, a telescopic groove 123 is formed in the leg box 122. The leg box 122 includes an upper plate 125 and a lower plate 126 arranged at an interval, the upper plate 125 is located above the lower plate 126, side plates 127 are arranged on two sides of the upper plate 125 and the lower plate 126, one end of the telescopic leg 124 is accommodated between the upper plate 125 and the lower plate 126, and the upper plate 125, the lower plate 126 and the side plates 127 enclose a telescopic groove 123.
The end of the telescoping leg 124 remote from the vertical leg 130 is movably connected to the telescoping slot 123, and the telescoping leg 124 can slide within the telescoping slot 123 to telescope relative to the leg box 122. Specifically, the telescopic leg 124 is hollow inside, and the telescopic leg 124 is a rectangular parallelepiped shaped housing. The end of the telescoping leg 124 remote from the leg box 122 is connected vertically to a vertical leg 130. The leg box 122 and the telescoping leg 124 are coaxially disposed and share a common central axis, i.e., the central axis of the horizontal leg 120 is the central axis of both.
A foot supporting plate 132 is movably connected to the bottom end of the vertical leg 130, and the foot supporting plate 132 is used for directly contacting with the ground so that the vertical leg 130 is stably supported on the ground. The leg supporting plate 132 is connected with the vertical leg 130 by a spherical hinge structure, so that the leg supporting plate 132 can flexibly adjust the inclination angle to adapt to the ground under different conditions, and the support stability of the vertical leg 130 is ensured.
The strain sensor 140 may be a resistive strain sensor or a fiber grating strain sensor. The strain sensor 140 may detect a stress strain of the measurand.
Referring to fig. 3, in the present embodiment, the strain sensor 140 is disposed on the telescopic leg 124. In this embodiment, in order to enhance the protection of the strain sensor 140, the strain sensor 140 is packaged in a package 142, and the package 142 is detachably connected to the inner wall of the telescopic leg 124 through a screw 144, so that the strain sensor 140 can be prevented from being damaged due to collision of foreign objects, and the normal operation of the strain sensor can be prevented from being affected. In other embodiments, the package 142 may not be detachable, and only needs to be configured according to actual needs. In this embodiment, the package member 142 and the telescopic leg 124 are made of the same material, and both are made of steel material, so as to reduce measurement errors caused by temperature changes. In other embodiments, the materials of the package 142 and the retractable leg 124 may be different, and only the detection requirement needs to be satisfied. In this embodiment, the telescopic leg 124 is in a rectangular parallelepiped shape, and the strain sensor 140 is disposed on the inner wall of the telescopic leg 124 in the vertical direction, in other embodiments, the strain sensor 140 may also be disposed on the inner wall of the telescopic leg 124 in the horizontal direction, and only the position of the strain sensor is not on the horizontal plane where the central axis is located, and the strain sensor may be disposed according to actual needs.
In other embodiments, the strain sensor 140 may be directly mounted on the inner wall of the telescopic leg 124 without the package 142, and only needs to satisfy the detection requirement. It is understood that in other embodiments, the package 142 with the strain sensor 140 embedded therein may be disposed on the outer wall of the telescopic leg 124, only to ensure that the strain sensor 140 can work normally.
In the present embodiment, the strain sensor 140 is located below the horizontal plane where the central axis of the horizontal leg 120 is located, and when the vertical leg 130 is not lifted off the ground, the vertical leg 130 is supported on the ground and has a support reaction force against one end of the telescopic leg 124, and the vertical leg 130 is in a support state. The horizontal leg 120 is used to connect to the vehicle body 210, and the vehicle body 210 itself has gravity, so that the cross section perpendicular to the axis of the telescopic leg 124 can generate a tensile stress in the lower half, and the strain sensor 140 detects a tensile stress signal. When the vertical leg 130 is or is about to be lifted off the ground, the vertical leg 130 is in an unsupported state. The vertical leg 130 is no longer supported on the ground and no longer generates a supporting counterforce on the telescopic leg 124, at this time, the vertical leg 130 is equivalent to be hung at one end of the horizontal leg 120, the stress state on the section of the telescopic leg 124 perpendicular to the axis is changed, the stress at the position of the strain sensor 140 is changed into compressive stress, the strain sensor 140 detects a compressive stress signal, and thus the strain sensor 140 can detect the difference of the front and rear stress states. Therefore, once the vertical leg 130 starts to lift off the ground, the vertical leg 130 is in the non-supporting state, and the strain sensor 140 can sensitively detect whether the leg has a tendency to lift off the ground or whether the leg lifts off the ground according to the change of the stress state at the position.
In other embodiments, the strain sensor 140 may be located above the horizontal plane in which the central axis of the horizontal leg 120 is located, with the stress state reversed from that described above: when the vertical leg 130 is in the support state, the strain sensor 140 detects a compressive stress signal; the strain sensor 140 detects a tensile stress signal when the vertical leg 130 is in an unsupported state. The strain sensor 140 can also reflect whether the vertical leg 130 has a tendency to lift off the ground or whether it lifts off the ground based on the change in stress state.
In the present embodiment, the distance between the strain sensor 140 and the vertical leg 130 is not greater than 1/4 for the length of the telescoping leg 124, i.e., the strain sensor 140 is disposed in the high stress region of the telescoping leg 124, thereby improving the sensitivity of the strain sensor 140. In other embodiments, the installation position of the strain sensor 140 may be confirmed according to the actual stress distribution, and it is only necessary to be able to generate a change in the stress state in the extendable leg 124 when the vertical leg 130 is in the supporting state and the non-supporting state.
In addition, different stress states are generated near the connecting position of the leg box 122 and the telescopic leg 124 due to whether the vertical leg 130 is in the supporting state, and the change rule of the stress is substantially the same as the change rule of the telescopic leg 124, so the strain sensor 140 may be disposed on the leg box 122, and the strain sensor 140 deviates from the horizontal plane where the central axis of the horizontal leg 120 is located, so that whether the vertical leg 130 is in the supporting state can be detected to determine whether the vertical leg 130 is inclined to leave the ground.
Specifically, the strain sensor 140 may be disposed on the upper plate 125 or the lower plate 126, and the strain sensor 140 may also be disposed on the side plate 127 on a horizontal plane deviating from the central axis of the horizontal leg 120, and these parts can generate stress changes before and after the vertical leg 130 leaves the ground, so as to meet the detection requirement. If the strain sensor 140 is disposed at the lower half portion of the leg box 122, the strain sensor 140 can detect a tensile stress when the vertical leg 130 is in the supporting state; the strain sensor 140 can detect compressive stress when the vertical leg 130 is in an unsupported state. If the strain sensor 140 is disposed at the upper half portion of the leg box 122, the strain sensor 140 can detect the compressive stress when the vertical leg 130 is in the supporting state, i.e., the vertical leg 130 is not lifted off the ground; the strain sensor 140 can detect tensile stress when the vertical leg 130 is in an unsupported state. To ensure that the stress changes can be effectively detected, the distance between the strain sensor 140 and the end of the leg box 122 close to the vertical leg 130 is not greater than the length of the telescopic leg 124 accommodated in the leg box 122, i.e. the strain sensor 140 is always located in the overlapping region of the leg box 122 and the telescopic leg 124 in the axial direction.
In other embodiments, the telescopic leg 124 and the leg box 122 may also be provided with the strain sensor 140 at the same time, and the two strain sensors 140 may cooperate to jointly detect whether the vertical leg 130 is lifted off the ground, so that the detection result is more reliable.
The embodiment also provides a working machine. In this embodiment, the working machine may be a lifting fire truck, an aerial lift truck, a pump truck, a crane, or the like. The work machine includes a controller, a vehicle body 210, and a leg device 100, and the vehicle body 210 is provided with an arm support for rotating on the vehicle body 210 to work toward a designated direction. The controller is electrically connected with the strain sensor 140, and is used for judging the supporting state of the vertical supporting leg 130 according to the stress detection signal sent by the strain sensor 140 and controlling the motion of the arm support according to the supporting state of the vertical supporting leg 130. In other embodiments, the work machine may be a crane or the like.
Specifically, if the strain sensor 140 is located below the horizontal plane where the central axis of the horizontal leg 120 is located, when the strain sensor 140 detects a tensile stress signal, the controller determines that the vertical leg 130 is in the supporting state; when the strain sensor 140 detects a compressive stress signal, the controller determines that the vertical leg 130 is in the unsupported state.
If the strain sensor 140 is located on the horizontal plane where the central axis of the horizontal leg 120 is located, when the strain sensor 140 detects a compressive stress signal, the controller determines that the vertical leg 130 is in the supporting state; when the strain sensor 140 detects a tensile stress signal, the controller determines that the vertical leg 130 is in the unsupported state.
The controller is connected with a driving mechanism for driving the arm support to rotate. When the controller judges that the vertical support leg 130 is in the non-support state, the controller controls the arm support to stop rotating continuously, or the controller controls the arm support to rotate so that the gravity center of the arm support is close to the gravity center of the vehicle body 210, so that the situation that the vertical support leg 130 tilts further away from the ground due to the fact that the arm support further rotates is avoided, and safety accidents caused by the fact that the vehicle body 210 tilts are prevented.
In this embodiment, the controller is disposed inside the vehicle body 210, and the electrical connection wiring between the strain sensor 140 and the controller is located inside the horizontal leg 120, thereby preventing the cable from being exposed, reducing the damage probability, avoiding the damage of the cable from affecting the detection result, and further ensuring the reliability of the ground-off detection of the leg. In the present embodiment, the number of the horizontal legs 120 is plural, and each of the horizontal legs 120 is provided with the strain sensor 140. Each strain sensor 140 is electrically connected to the controller.
In other embodiments, the controller may be directly disposed in the horizontal leg 120, so long as the detection requirement is satisfied. In other embodiments, the electrical connection traces between the strain sensor 140 and the controller may be routed from the outside of the horizontal leg 120, which only needs to meet the actual usage requirements.
In other embodiments, the work machine may further include an alarm device, the controller is electrically connected to the alarm device, and when the controller determines that the vertical support leg 130 is in the non-support state, the controller controls the alarm device to perform an early warning prompt so as to prompt an operator that at least one vertical support leg 130 on the vehicle body 210 has a tendency to lift off the ground or has lifted off the ground, so that a hidden danger that the vehicle body 210 is tilted over exists, and a remedial measure is made to prevent a danger.
The working principle and working process of the leg support device 100 and the working machine are as follows:
the strain sensor 140 is disposed on the inner wall of the telescoping leg 124 in the vertical direction and below the horizontal plane in which the central axis is located.
When the vertical leg 130 is in the supporting state, the vertical leg 130 is supported on the ground and has a supporting counterforce on one end of the telescopic leg 124, the horizontal leg 120 is connected to the vehicle body 210, and the vehicle body 210 has gravity, so that the section of the telescopic leg 124 perpendicular to the axis can generate a tensile stress at the lower half part, the strain sensor 140 detects a tensile stress signal, and the controller can judge that the vertical leg 130 is not lifted off the ground after receiving the tensile stress signal and control the arm support on the vehicle body 210 to continue normal operation.
When the vertical leg 130 is in the non-support state, the vertical leg 130 is no longer supported on the ground so as to no longer generate a support counterforce on the telescopic leg 124, at this time, the vertical leg 130 is equivalent to be hung at one end of the telescopic leg 124, the stress state on the cross section of the telescopic leg 124 perpendicular to the axis is changed, the stress at the position of the strain sensor 140 is changed into a compressive stress, the strain sensor 140 detects a compressive stress signal, the controller can judge that the vertical leg 130 has a tendency to lift off the ground or has lifted off the ground after receiving the compressive stress signal, the controller immediately controls the arm support to stop rotating continuously, or the controller controls the arm support to rotate so that the center of gravity of the arm support is close to the center of gravity of the vehicle body 210, so that the vertical leg 130 is prevented from further lifting off the ground due to the.
Therefore, the strain sensor 140 can detect the supporting state of the vertical leg 130, so that once the vertical leg 130 starts to lift off the ground, the strain sensor 140 can sensitively detect the lift-off of the leg according to the change of the stress state at the position. The structure is succinct, detects sensitive reliable, effectively improves the security of operation machinery.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A leg device comprises a horizontal leg (120) and a vertical leg (130), wherein one end of the horizontal leg (120) is used for being connected to a vehicle body (210) of a working machine, the other end of the horizontal leg is connected to the vertical leg (130), the leg device is characterized by further comprising a strain sensor (140), the strain sensor (140) is arranged on the horizontal leg (120) and deviates from a horizontal plane where a central axis of the horizontal leg (120) is located, and the strain sensor (140) is used for detecting a stress state of the horizontal leg (120) so as to detect a supporting state of the vertical leg (130).
2. The leg arrangement as claimed in claim 1, characterized in that the horizontal leg (120) comprises a leg box (122) and a telescoping leg (124), the leg box (122) being adapted to be connected to the vehicle body (210), one end of the telescoping leg (124) being received in the leg box (122) and the telescoping leg being telescopable relative to the leg box (122), the other end of the telescoping leg (124) being connected to the vertical leg (130), the strain sensor (140) being arranged at the telescoping leg (124).
3. The leg arrangement of claim 2, wherein a distance between the strain sensor (140) and the vertical leg (130) is no greater than 1/4 of the length of the telescoping leg (124).
4. The leg arrangement of claim 2, wherein the telescoping leg (124) is hollow inside, and the strain sensor (140) is encapsulated in an encapsulation (142), the encapsulation (142) being connected to an inner wall of the telescoping leg (124).
5. The leg arrangement as claimed in claim 4, characterized in that the enclosing member (142) and the telescoping leg (124) are of the same material.
6. The leg arrangement as claimed in claim 1, characterized in that the horizontal leg (120) comprises a leg box (122) and a telescoping leg (124), the leg box (122) is adapted to be connected to the vehicle body (210), one end of the telescoping leg (124) is received in the leg box (122) and the telescoping leg is capable of telescoping relative to the leg box (122), the other end of the telescoping leg (124) is connected to the vertical leg (130), the strain sensor (140) is arranged in the leg box (122), and the distance between the strain sensor (140) and the end of the leg box (122) near the vertical leg (130) is not greater than the length of the telescoping leg (124) received in the leg box (122).
7. A working machine, characterized by comprising a controller, a vehicle body (210) and the support leg device (100) of any one of claims 1 to 6, wherein the vehicle body (210) is provided with a support leg, the controller is electrically connected with the strain sensor (140), and the controller is used for judging the support state of the vertical support leg (130) according to a stress detection signal sent by the strain sensor (140) and controlling the action of the support leg according to the support state of the vertical support leg (130).
8. The work machine of claim 7, wherein said strain sensor (140) is located below a level at which a central axis of said horizontal leg (120) is located, said controller being configured to determine that said vertical leg (130) is in a support state when said strain sensor (140) detects a tensile stress signal; the controller is used for judging that the vertical supporting leg (130) is in a non-supporting state when the strain sensor (140) detects a compressive stress signal.
9. The work machine of claim 7, wherein said strain sensor (140) is located above a horizontal plane in which a central axis of said horizontal leg (120) is located, said controller being configured to determine that said vertical leg (130) is in a support state when said strain sensor (140) detects a compressive stress signal; the controller is used for judging that the vertical supporting leg (130) is in a non-supporting state when the strain sensor (140) detects a tensile stress signal.
10. The work machine of claim 7, wherein electrical connection traces between the strain sensor (140) and the controller are located within the horizontal leg (120).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922376975.5U CN211918629U (en) | 2019-12-25 | 2019-12-25 | Support leg device and working machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922376975.5U CN211918629U (en) | 2019-12-25 | 2019-12-25 | Support leg device and working machine |
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| CN211918629U true CN211918629U (en) | 2020-11-13 |
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| CN201922376975.5U Active CN211918629U (en) | 2019-12-25 | 2019-12-25 | Support leg device and working machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108970A (en) * | 2021-03-03 | 2021-07-13 | 徐州工程学院 | Supporting leg counter-force measuring device and measuring method |
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2019
- 2019-12-25 CN CN201922376975.5U patent/CN211918629U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108970A (en) * | 2021-03-03 | 2021-07-13 | 徐州工程学院 | Supporting leg counter-force measuring device and measuring method |
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