阅读说明：本技术 一种支腿式工程机械 (Supporting leg type engineering machinery ) 是由 张林军 孙松 向纯 于 2019-10-18 设计创作，主要内容包括：本发明提供了一种支腿式工程机械,涉及工程机械技术领域。支腿式工程机械包括作业主体以及用于支撑作业主体的多个垂直支腿,垂直支腿包括垂直支腿油缸、支腿盘和支腿反力传感器,支腿反力传感器连接于垂直支腿油缸和支腿盘之间,垂直支腿油缸用于调整垂直支腿的长度,支腿反力传感器用于检测支腿反力,支腿盘用于承载支腿反力传感器并支撑于地面。支腿式工程机械的支腿反力的监测结果误差小,工程机械安全性较高。(The invention provides a supporting leg type engineering machine, and relates to the technical field of engineering machines. Leg formula engineering machine tool includes the operation main part and is used for supporting a plurality of perpendicular landing legs of operation main part, and perpendicular landing leg includes perpendicular landing leg hydro-cylinder, landing leg dish and landing leg reaction force sensor, and landing leg reaction force sensor connects between perpendicular landing leg hydro-cylinder and landing leg dish, and perpendicular landing leg hydro-cylinder is used for adjusting the length of perpendicular landing leg, and landing leg reaction force sensor is used for detecting the landing leg reaction force, and the landing leg dish is used for bearing landing leg reaction force sensor and supports in ground. The monitoring result error of the supporting leg counter force of the supporting leg type engineering machinery is small, and the safety of the engineering machinery is high.)

1. The utility model provides a landing leg formula engineering machine tool which characterized in that, includes the operation main part and is used for supporting a plurality of perpendicular landing legs of operation main part, perpendicular landing leg includes perpendicular landing leg hydro-cylinder, landing leg dish and landing leg reaction force sensor, landing leg reaction force sensor connect in perpendicular landing leg hydro-cylinder with between the landing leg dish, perpendicular landing leg hydro-cylinder is used for adjusting the length of perpendicular landing leg, landing leg reaction force sensor is used for detecting the landing leg reaction force, the landing leg dish is used for bearing landing leg reaction force sensor supports in ground.

2. The leg type construction machine according to claim 1, wherein the leg reaction force sensor includes an elastic body and a strain element provided in the elastic body, one end of the elastic body is connected to the vertical leg cylinder, the other end of the elastic body abuts against the leg plate, and the strain element is configured to detect a leg reaction force.

3. The leg type construction machine according to claim 2, wherein the elastic body is made of stainless steel.

4. The leg type construction machine according to claim 2, wherein the leg reaction force sensor includes a signal output wire embedded in the elastic body, the signal output wire being connected to the strain element and passing out of the elastic body.

5. The leg type construction machine according to claim 2, wherein the elastic body includes a first connecting portion, a body, and a second connecting portion, the first connecting portion and the second connecting portion are respectively connected to both ends of the body, the first connecting portion is connected to a piston rod of the vertical leg cylinder, the strain element is disposed on the body, and the second connecting portion is supported on the leg plate.

6. The leg type construction machine according to claim 5, wherein the second connecting portion is provided with a support spherical surface, and the leg plate is provided with a spherical groove engaged with the support spherical surface.

7. The leg type construction machine according to claim 5, wherein the first connecting portion is screw-connected to a piston rod of the vertical leg cylinder.

8. The leg type working machine according to claim 5, wherein the leg reaction force sensor includes at least two strain elements, the at least two strain elements being provided at intervals in a circumferential direction of the body.

9. The leg type construction machine according to claim 5, wherein the strain element is provided on an outer wall of the body, and the leg reaction force sensor includes a protective cover that is provided on an outer portion of the body in a circumferential direction to protect the strain element.

10. The leg type construction machine according to claim 9, wherein the elastic body includes a slip preventing member for holding, the slip preventing member being provided between the body and the first connecting portion, the slip preventing member being located outside the protective cover.

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a supporting leg type engineering machinery.

Background

The leg type construction machine includes an automobile crane, a concrete pump truck, and the like, and supports the entire operation body by means of a plurality of legs at the time of operation. Due to the fact that a roadbed is uneven, the roadbed collapses or the soft roadbed and the like, the leg type engineering machinery often has rollover accidents during operation. In order to prevent the engineering machinery from tipping over during operation, the leg type engineering machinery monitors the counterforce of the legs through a sensor so as to monitor the safety condition of the engineering machinery. However, the monitoring result error of the leg reaction force sensor of the existing leg type engineering machinery is large, and the safety of the engineering machinery is not guaranteed.

Disclosure of Invention

The invention aims to provide a supporting leg type engineering machine, which has small error of a monitoring result of supporting leg reaction force and higher safety of the engineering machine.

Embodiments of the invention may be implemented as follows:

the embodiment of the invention provides a leg type engineering machine which comprises an operation main body and a plurality of vertical legs for supporting the operation main body, wherein each vertical leg comprises a vertical leg oil cylinder, a leg disc and a leg reaction sensor, the leg reaction sensor is connected between the vertical leg oil cylinder and the leg disc, the vertical leg oil cylinder is used for adjusting the length of the vertical leg, the leg reaction sensor is used for detecting the leg reaction, and the leg disc is used for bearing the leg reaction sensor and is supported on the ground.

In an alternative embodiment, the leg reaction force sensor includes an elastic body and a strain element disposed on the elastic body, one end of the elastic body is connected to the vertical leg cylinder, the other end of the elastic body abuts against the leg disc, and the strain element is used for detecting leg reaction force.

In an alternative embodiment, the elastomer is made of stainless steel.

In an alternative embodiment, the leg reaction force sensor includes a signal output lead embedded in the elastic body, and the signal output lead is connected with the strain element and penetrates out of the elastic body.

In an optional embodiment, the elastic body comprises a first connecting portion, a body and a second connecting portion, the first connecting portion and the second connecting portion are respectively connected to two ends of the body, the first connecting portion is connected with a piston rod of the vertical leg oil cylinder, the strain element is arranged on the body, and the second connecting portion is borne on the leg disc.

In an alternative embodiment, the second connecting portion is provided with a support sphere and the leg disc is provided with a spherical recess cooperating with the support sphere.

In an alternative embodiment, the first connection is threadedly connected to the piston rod of the vertical leg cylinder.

In an alternative embodiment, the leg reaction force sensor comprises at least two strain elements, the at least two strain elements being arranged at intervals along the circumference of the body.

In an alternative embodiment, the strain element is provided on an outer wall of the body, and the leg reaction force sensor includes a protective cover provided circumferentially on an outer portion of the body to protect the strain element.

In an alternative embodiment, the elastic body comprises a slip-preventing member for holding, the slip-preventing member is arranged between the body and the first connecting portion, and the slip-preventing member is located outside the protective cover.

The embodiment of the invention has the beneficial effects that:

leg formula engineering machine tool includes the operation main part and is used for supporting a plurality of perpendicular landing legs of operation main part, and perpendicular landing leg includes perpendicular landing leg hydro-cylinder, landing leg dish and landing leg reaction force sensor, and landing leg reaction force sensor connects between perpendicular landing leg hydro-cylinder and landing leg dish, and perpendicular landing leg hydro-cylinder is used for adjusting the length of perpendicular landing leg, and landing leg reaction force sensor is used for detecting the landing leg reaction force, and the landing leg dish is used for bearing landing leg reaction force sensor and supports in ground. This landing leg formula engineering machine tool carries out direct monitoring through landing leg reaction force sensor to the counter-force condition of landing leg to landing leg reaction force sensor sets up between perpendicular landing leg hydro-cylinder and the landing leg dish of perpendicular landing leg, landing leg dish and ground contact, install in the mode at perpendicular landing leg hydro-cylinder top with current landing leg reaction force sensor and compare, this landing leg reaction force sensor is sensitive to the landing leg counter-force response of whole perpendicular landing leg more, the monitoring data error is littleer, it is more accurate to grasp landing leg reaction force condition, effectively improve engineering machine tool's security.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed 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 structural diagram of a leg-type construction machine according to an embodiment of the present invention;

FIG. 2 is an assembly view of a horizontal leg and a vertical leg of an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a leg reaction force sensor according to an embodiment of the invention;

fig. 4 is an exploded view of a leg reaction force sensor in an embodiment of the invention.

Icon: 100-a leg type engineering machine; 110-a job master; 120-horizontal leg support; 130-vertical legs; 131-vertical support oil cylinder; 132-a cylinder body; 133-leg plate; 134-a piston rod; 135-leg reaction force sensor; 136-an elastomer; 137-first connection; 138-a strain element; 139-body; 141-a second connection; 142-signal output conductors; 144-external threads; 146-a support sphere; 148-anti-slip; 149-plane; 150-protective cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention 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 figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.

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 if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Referring to fig. 1 and 2, the present embodiment provides a leg-type engineering machine 100, which includes an operation body 110 and a plurality of vertical legs 130 for supporting the operation body 110. The vertical leg 130 includes a vertical leg cylinder 131, a leg plate 133, and a leg reaction force sensor 135, and the leg reaction force sensor 135 is connected between the vertical leg cylinder 131 and the leg plate 133. The vertical leg cylinder 131 is used to adjust the length of the vertical leg 130, the leg reaction force sensor 135 is used to detect leg reaction force, and the leg plate 133 is used to support the leg reaction force sensor 135 and is supported on the ground.

The leg-type engineering machine 100 may be an automobile crane, a concrete pump truck, or other engineering machine that needs to support a leg during operation. In this embodiment, the leg type construction machine 100 further includes a horizontal leg 120, one end of the horizontal leg 120 is connected to the working body 110, and the other end is vertically connected to a vertical leg 130, and the vertical leg 130 is configured to be substantially vertically contacted with the ground. The horizontal leg 120 and the vertical leg 130 together form a support assembly, and the typical leg-type construction machine 100 includes 4 sets of support assemblies arranged at intervals, and the 4 sets of support assemblies together support the working body 110. The working body 110 is a supported work machine body. The support assembly of the horizontal leg 120 and the vertical leg 130 can maintain the stability of the working body 110 to prevent overturning, ensuring safety.

The vertical leg cylinder 131 includes a cylinder body 132 and a piston rod 134 connected to the cylinder body 132. The upper end of the cylinder 132 is fixed to the horizontal leg 120, the piston rod 134 is extendable and retractable downward of the cylinder 132, and the end of the piston rod 134 remote from the horizontal leg 120 is connected to the leg reaction force sensor 135.

The leg plate 133 is used to be placed on the ground and in contact with the leg reaction force sensor 135 so as to support the leg reaction force sensor 135. It will be appreciated that in other embodiments the ground may also be a work surface or a surface of another platform that is manually provided.

Referring to fig. 3 and 4, the leg reaction force sensor 135 includes an elastic body 136 and a strain element 138 disposed on the elastic body 136. One end of the elastic body 136 is connected to the vertical leg cylinder 131, the other end is in contact with the leg plate 133, and the strain element 138 detects a leg reaction force. In this embodiment, in order to ensure the structural strength of the leg reaction force sensor 135, the elastic body 136 is made of stainless steel, has good elasticity, corrosion resistance, sensitivity and stability, and is suitable for various severe field operation environments. In other embodiments, the material of the elastic body 136 may be copper or carbon fiber. That is, the leg reaction force sensor 135 is directly involved in supporting the compression as a part of the vertical leg 130. Meanwhile, the leg reaction force sensor 135 is provided at the bottom of the vertical leg cylinder 131, and can sense the force of the entire leg including the vertical leg cylinder 131. The existing supporting leg reaction force sensor 135 is arranged between the horizontal supporting leg 120 and the vertical supporting leg 130, and is clamped between the horizontal supporting leg 120 and the cylinder flange, so that bolt pretightening force exists on one hand, and the stress change in the vertical supporting leg cylinder 131 cannot be sensitively sensed to a certain extent on the other hand, and a detection result is easy to have large errors.

The elastic body 136 includes a first connecting portion 137, a body 139 and a second connecting portion 141, and the first connecting portion 137 and the second connecting portion 141 are respectively connected to two ends of the body 139.

To facilitate assembly, the first connection portion 137 is threadedly coupled to the piston rod 134 of the vertical leg cylinder 131. In the present embodiment, the first connecting portion 137 is provided with an external thread 144, the piston rod 134 of the vertical leg cylinder 131 is provided with an internal thread which is matched with the external thread 144, and at least a portion of the first connecting portion 137 extends into the end portion of the piston rod 134 and is threadedly connected with the piston rod 134. It will be appreciated that in other embodiments, the first connection portion 137 may also be provided with an internal thread, such that the piston rod 134 is provided with an external thread to be fixed with the first connection portion 137 by a screw-fit.

The strain element 138 is disposed on the body 139. The leg reaction force sensor 135 includes at least two strain elements 138, the body 139 is generally columnar, and the at least two strain elements 138 are provided at intervals in the circumferential direction of the body 139. The strain element 138 is disposed on an outer wall of the body 139. In the present embodiment, the body 139 has 4 planes in the circumferential direction, and the body 139 is substantially rectangular parallelepiped. The number of the strain elements 138 is 4, and the 4 strain elements 138 are fixed on 4 planes in a one-to-one correspondence manner, and are ensured to be arranged symmetrically and uniformly as much as possible so as to accurately detect the counterforce of the support leg, in this embodiment, the strain elements 138 are piezoresistive strain gauges. In other embodiments, the strain element 138 may also be an optical strain gage or the like. It is understood that in other embodiments, the body 139 may be cylindrical. The leg reaction force sensor 135 includes a signal output lead 142 embedded in the elastic body 136, and the signal output lead 142 is connected to the strain element 138 and extends out of the elastic body 136. In the present embodiment, all of the 4 strain elements 138 are connected to the signal output wire 142, and a portion of the signal output wire 142 is embedded in the main body 139 and penetrates out of the elastic body 136, that is, an internal routing manner is adopted to prevent the signal output wire 142 from externally hindering the sensing detection of the strain elements 138. During detection, the signal output wires 142 transmit the strain data of all the strain elements 138 to the control module, and the processor of the control module can process the data and give real-time leg reaction force data.

The second connecting portion 141 is for abutting the leg plate 133 to support the vertical leg 130. In normal operation, the leg plate 133 is placed on the ground, and the second connecting portion 141 is carried on the leg plate 133. The second connecting portion 141 is provided with a supporting spherical surface 146, the supporting spherical surface 146 is located at the bottom of the second connecting portion 141, the leg plate 133 is correspondingly provided with a spherical groove matched with the supporting spherical surface 146, and the supporting spherical surface 146 is matched with the leg plate 133, so that the bottom end of the vertical leg 130 is fixed. In this embodiment, the bottom of the second connecting portion 141 is provided with a hemispherical block, the supporting spherical surface 146 is provided with a hemispherical block, and the hemispherical block is located in the spherical groove of the leg plate 133, so that the supporting direction can be flexibly adjusted, and the supporting can be stably supported even if the ground is inclined.

Because the whole leg reaction force sensor 135 needs to rotate when being assembled and disassembled, the elastic body 136 comprises an anti-slip piece 148 used for holding, the anti-slip piece 148 is arranged between the body 139 and the first connecting portion 137, the anti-slip piece 148 is provided with a plurality of planes 149 in the circumferential direction, the planes 149 can be conveniently held by an operator, the anti-slip effect is achieved, and the assembly efficiency of the leg reaction force sensor 135 and the vertical leg oil cylinder 131 can be improved. In this embodiment, a slip-proof member 148 is also disposed between the body 139 and the second connecting portion 141 to increase the holding position, so as to facilitate quick assembly by the operator. It will be appreciated that in other embodiments, the anti-slip members 148 may be eliminated, and only sufficient friction on the surface of the elastomer 136 to enable screwing for assembly may be ensured. In this embodiment, to ensure the structural strength, the first connecting portion 137, the body 139, the second connecting portion 141 and the anti-slip member 148 are integrally formed.

The leg reaction force sensor 135 includes a protective cover 150, and the protective cover 150 is made of stainless steel. The protective cover 150 circumferentially covers the outside of the body 139 to protect the strain element 138. The protective cover 150 is a cylindrical tube with two open ends, the protective cover 150 is sleeved outside the body 139 and has two ends welded to the anti-slip parts 148 at the two ends, and the whole protective cover 150 is axially located between the two anti-slip parts 148, so that the two anti-slip parts 148 are both located outside the protective cover 150, and an operator can directly hold the protective cover. The signal output lead 142 passes out through the anti-slip member 148 without being shielded by the protective cover 150. The diameter of the protective cover 150 is larger than the outer radial dimension of the body 139, so that a gap is formed between the inner wall of the protective cover 150 and the outer wall of the body 139, a space is reserved for the strain element 138, and the influence on the detection result caused by the contact between the protective cover 150 and the strain element 138 is avoided.

The working principle of the leg type construction machine 100 is as follows:

the work body 110 is supported by the horizontal leg 120 and the vertical leg 130. The vertical leg cylinder 131 of the vertical leg 130 is connected to the horizontal leg 120 for adjusting the length of the vertical leg 130. The bottom end of the piston rod 134 of the vertical leg cylinder 131 is connected to the leg reaction force sensor 135, the leg plate 133 is placed on the ground, and the bottom end of the leg reaction force sensor 135 is seated in the groove of the leg plate 133, thereby fixing the bottom end of the vertical leg 130. When the working body 110 performs normal work, the leg reaction force sensor 135 serves as a part of the vertical leg 130 to bear the pressure applied to the leg, the leg reaction force sensor 135 can transmit the pressure information to the control module through the signal output wire 142 by means of the deformation of the strain element 138, and the processor of the control module can process the data and give real-time data of the leg reaction force. Because landing leg reaction force sensor 135 sets up in perpendicular landing leg hydro-cylinder 131 bottom and be connected with landing leg dish 133 direct fit, can detect the total pressure that will perpendicular landing leg 130 bear as far as possible, convenient and fast, the error of result is less, monitors at any time, does benefit to and prevents that landing leg formula engineering machine 100 from taking place the accident of toppling.

The leg type construction machine 100 directly monitors the reaction force of the leg by the leg reaction force sensor 135, and the leg reaction force sensor 135 is provided between the vertical leg cylinder 131 and the leg plate 133 of the vertical leg 130, and the leg plate 133 is in contact with the ground. Compared with the existing mode of installing a reaction sensor at the top of the vertical leg oil cylinder 131, the leg reaction sensor 135 of the leg type engineering machine 100 is sensitive to the reaction of the whole leg, the error of monitoring data is small, the reaction condition of the leg is mastered more accurately, and the safety of the engineering machine is effectively improved.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.