CN114249284A - Anti-extrusion device and aerial work machine - Google Patents

Abstract

The invention relates to a safety protection device, and discloses an anti-extrusion device and an aerial working machine, wherein the anti-extrusion device comprises a movable mechanism, a movable mechanism and a control mechanism, wherein the movable mechanism comprises an impact rod and a connecting rod, two ends of the impact rod are respectively hinged with two sides of a control table board correspondingly through one connecting rod, so that the impact rod can respond to extrusion thrust borne by an operator to enable the impact rod to move and pivot from an initial state to a direction far away from the operator; the height of the collision rod in the vertical direction is lower than that of a hinged point of the connecting rod and the control table top in the vertical direction, so that the collision rod can pivot downwards in response to the extrusion thrust applied to an operator; a position signal detecting mechanism installed to be able to detect and transmit a movement position signal of the impact bar so that a control unit can perform a control operation based on the movement position signal. The anti-extrusion device of the invention ensures that the collision rod can only move downwards, thus ensuring the safety of operators.

Description

Anti-extrusion device and aerial work machine

Technical Field

The invention relates to a safety protection device, in particular to an anti-extrusion device. Furthermore, the invention also relates to an aerial working machine with the anti-extrusion device.

Background

A mobile operation platform is usually installed on the lifting operation machine, and is used for accommodating an operator, a control platform is usually installed on the mobile operation platform, and the control platform is fixed on one side of the mobile operation platform facing forward along the main movement direction of the machine, so that the operator can conveniently perform corresponding operation.

With this type of equipment, due to the complex working environment during the working or construction process, these equipments do not notice the large-size obstacle behind during the backward movement or reversing process, or when there is an accidental falling object impact behind, it may cause huge extrusion injury or even casualty accident to the operators in the mobile operation platform. For example, in the moving process of a mobile operation platform, if an operation is careless and a rear obstacle is not noticed, the situation that an operator is extruded and injured by a peripheral obstacle during operation occurs in an overhead operation machine (a tower crane, a lifter, and the like).

In response to the above risks, those skilled in the art have devised various types of mobile operator station anti-jamming devices to mitigate or avoid injury to the operator. For example, (1) a push switch sends a signal when the pressure reaches a set value; (2) and the press-touch switch triggered by extrusion is broken for protection and the like. However, the above-mentioned pressing prevention device for a mobile operation table in the prior art has certain disadvantages in practical application.

For the anti-extrusion device which adopts a push switch and is opened when the pressure reaches a set value or the anti-extrusion device which adopts extrusion to trigger the press-touch switch to be opened, the mechanism essentially applies the anti-extrusion device which triggers an alarm or stops the equipment to run through the integral movement or rotation of a rigid rod, the rigid rod usually has a higher installation position, and when an obstacle collides and impacts instantaneously, the height of an operator is generally not very high, so that the part above the chest of the operator can be extruded by the rigid rod sometimes, and if the part above the neck of the operator is extruded, the personal safety of the operator is greatly threatened.

In view of the above, there is a need to design a new anti-extrusion device that can overcome the above technical problems and effectively solve or alleviate the above technical problems.

Disclosure of Invention

The invention aims to solve the technical problem of providing an anti-extrusion device, which enables a collision rod to move downwards only and ensures the safety of operators.

In order to solve the above technical solutions, a first aspect of the present invention provides an anti-extrusion device, including a movable mechanism, which includes an impact bar and a connecting rod, wherein two ends of the impact bar are respectively hinged to two sides of a control table through one connecting rod, so that the impact bar can move and pivot from an initial state to a direction away from an operator in response to an extrusion thrust applied to the operator; the height of the collision rod in the vertical direction is lower than that of a hinged point of the connecting rod and the control table top in the vertical direction, so that the collision rod can pivot downwards in response to the extrusion thrust applied to an operator; a position signal detecting mechanism installed to be able to detect and transmit a movement position signal of the impact bar so that a control unit can perform a control operation based on the movement position signal.

Optionally, the connecting rod is hinged to a corresponding side of the console top by an elastic damping element, which is provided with an elastic force that causes the impact bar to maintain the initial state or to return toward the initial state.

Further optionally, fixing mechanisms are respectively installed on two sides of the control table top, and the connecting rod is hinged to the fixing mechanisms through the elastic damping elements.

Specifically, optionally, the elastic damping element is a spring hinge, a torsion spring, or a gas spring.

Optionally, a limiting block is installed at one end of the connecting rod opposite to the collision rod.

Specifically, the upper surface of the limiting block is an inclined plane.

Alternatively, both ends of the collision bar form an azimuthally-selective and droppable connection structure with one of the connection bars, respectively, so that the collision bar can be separated from the connection bars at the extreme position in response to the squeezing thrust of the operator, thereby forming an infinite avoidance space.

Optionally, both ends of the collision bar are respectively connected with one of the connecting rods in a tight fit manner.

Optionally, the position signal detecting mechanism includes an operation signal detecting device that transmits a danger position signal when the collision bar moves to a danger position, and the control unit controls the mobile operation panel to brake or move toward a safety direction.

Further, position signal detection mechanism still includes early warning signal detection device, early warning signal detection device is in the collision rod moves early warning position transmission early warning position signal, the alarm is reported to the police to the control unit control.

Specifically, at least one of two sides of the control table is provided with the operation signal detection device and the early warning signal detection device.

The invention provides an aerial working machine in a second aspect, which comprises the anti-extrusion device in any one of the technical schemes.

Through the technical scheme, the collision rod and the connecting rod are skillfully designed to form the direction-selective-type detachable connecting structure, in the process that an operator is extruded, the operator applies extrusion force to the collision rod, the collision rod and the connecting rod are fixedly connected together at the moment, along with the pivoting of the collision rod and the connecting rod, when the collision rod rotates to the direction of the limit position, the operator is still extruded due to motion inertia, system failure or special conditions, and at the moment, the collision rod and the connecting rod can be separated and fall off under the action of the extrusion force of the body of the operator, so that the operator can avoid damage to the operator. Simultaneously, because the both ends of bumping pole are articulated through a connecting rod and the both sides of control table surface respectively correspondence, even the mobile operation platform appears rocking or vibrations, also can guarantee the stability to the detection of bumping pole turned position, avoid frequently reporting to the police, lead to the appearance of the phenomenon that the mobile operation platform frequently stops or starts the operation even.

In addition, set up the elastic damping element between connecting rod and control table face, to a certain extent, can prevent that operating personnel from bumping the touching impact bar by mistake and causing the appearance of alarm phenomenon, moreover, can reset the impact bar.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The following drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the scope of the invention. In the drawings:

FIG. 1 is a schematic view of the installation of an anti-extrusion device in an embodiment of the present invention;

FIG. 2 is a schematic perspective view of an anti-extrusion device according to an embodiment of the present invention;

FIG. 3 is a schematic view of the anti-extrusion device according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a dynamic rendering of an anti-extrusion device in an embodiment of the present invention;

FIG. 6 is a schematic circuit diagram of one specific form of the position signal detecting mechanism of the anti-racking device of the present invention;

FIG. 7 is a schematic view of the process of the anti-extrusion device falling off at the extreme position according to the embodiment of the present invention;

FIG. 8 is a second schematic view illustrating the process of falling off the anti-extrusion device at the extreme position according to the embodiment of the present invention;

FIG. 9 is a third schematic view of the anti-extrusion device of the present embodiment in the process of falling off at the extreme position;

FIG. 10 is one of the schematic views of an operator impacting the crash bar during a crash in accordance with an embodiment of the present invention;

FIG. 11 is a second schematic view of the process of the operator colliding with the crash bar during the squeezing collision according to the embodiment of the present invention.

Description of the reference numerals

1 collision bar 2 connecting bar

3 control table top 4 control unit

5 fixing mechanism for elastic damping element 6

7 limiting block

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the detailed description is provided for purposes of illustration and explanation and is not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; either directly or indirectly through intervening media, either internally or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the orientation terms are substantially the same as the orientation in which the anti-crushing device is installed in the mobile operation table, with reference to the orientation of the anti-crushing device itself; the orientations and positional relationships shown in the drawings are for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In addition, it should be noted that the mobile operation platform of the present invention refers to a position or area on various machines or equipment for controlling, driving, and manipulating by an operator, including but not limited to an operation platform of an aerial work machine, a center console of a concrete equipment, a driving operation area of a forklift truck used in a factory or other places, and the like, and all of them should fall within the protection scope of the present invention as long as they have the above-mentioned type of operation platform and adopt the technical solution of the anti-squeezing device of the present invention.

Referring to fig. 1 to 5, the basic embodiment of the present invention provides an anti-extrusion device, which comprises a movable mechanism, wherein the movable mechanism comprises an impact bar 1 and a connecting rod 2, two ends of the impact bar 1 are respectively hinged with two sides of a control table top 3 through one connecting rod 2, so that the impact bar 1 can make the impact bar 1 move and pivot from an initial state to a direction away from an operator in response to extrusion thrust applied to the operator; the height of the collision bar 1 in the vertical direction is lower than the height of a hinge point of the connecting rod 2 and the control table top 3 in the vertical direction, so that the collision bar 1 can pivot downwards in response to the extrusion thrust applied by an operator; and a position signal detection mechanism installed to be able to detect and transmit a movement position signal of the impact bar 1 so that the control unit 4 can perform a control operation based on the movement position signal.

In order to facilitate understanding of the technical solution of the anti-squeezing device of the present invention, the technical effects of the anti-squeezing device of the present invention will be specifically described below by applying it to a mobile console.

The invention relates to a high-altitude operation mechanical device, belonging to manned equipment, which generally adopts a mobile operation platform to carry operators, and a control platform is arranged on the mobile operation platform, as shown in figure 1, the anti-extrusion device of the invention is arranged above a control platform surface 3 of the control platform, and can be specifically arranged on the control platform surface 3, such as a handrail, a guard rail and the like. Since the two ends of the anti-extrusion device have the same structure, the following description will mainly take one end as an example.

In the technical scheme, the height of the collision rod 1 in the vertical direction is designed to be lower than the height of a hinge point of the connecting rod 2 and the control table top 3 in the vertical direction, so that when an operator is impacted by instantaneous collision of an obstacle, the collision rod 1 can only move downwards, and the potential safety hazard that the collision rod 1 moves upwards to extrude the operator (particularly above the neck) is eliminated. Further, the impact beam 1 is installed at the hinge point position by the connecting rod 2, and the impact beam 1 is lower than the hinge point position in the vertical direction, a greater safety protection distance can be provided.

Further, both ends of the collision bar 1 respectively form an azimuth-selective-type detachable connection structure with one of the connection bars 2, so that the collision bar 1 can be detached from the connection bars 2 at extreme positions in response to an extrusion thrust of an operator, thereby forming an infinite avoidance space.

The connecting rod 2 and the two ends of the collision rod 1 form the direction selection type detachable connecting structure skillfully, and compared with the existing extrusion prevention device which triggers the alarm or stops the equipment operation through the integral movement or rotation of the rigid rod, the direction selection type detachable connecting structure can realize the following function relation in the extrusion process of an operator: before connecting rod 2 and collision pole 1 pivot do not reach the extreme position, connecting rod 2 and collision pole 1 fixed connection, do not separate, form a rigid connection form, after collision pole 1 rotates near the position of extreme position, because motion inertia, system failure or special circumstances etc. make operating personnel still suffer the extrusion, at this moment, under the effect of operating personnel health extrusion force, collision pole 1 can separate with connecting rod 2 and drop to give operating personnel and infinitely dodge the space, avoid causing the harm to operating personnel. Any component on a mobile operation platform (especially an aerial work machine) is more stable and better for a person skilled in the art, so that the anti-extrusion device of the invention connects two ends of the impact rod 1 with the connecting rod 2 respectively, and has better stability as a rigid structure under the condition that the impact rod 1 is not separated from the connecting rod 2, and is convenient for detecting a moving position signal of the impact rod 1. It can be seen that the anti-extrusion device of this application utilizes the direction selection formula that forms between collision pole 1 and the connecting rod 2 can fall connection form and the rotation position of collision pole 1, forms the design that converts rigid connection into the unlimited space of dodging, can enough have detection stability concurrently, can provide the unlimited space of dodging again at extreme position, gives operating personnel safety guarantee.

Specifically, referring to fig. 5, the collision bar 1 and the connecting bar 2 can be connected in a manner of a tight fit, that is, the collision bar 1 and the connecting bar 2 can selectively fall off according to a set orientation, the tight fit is an interference fit relationship between the collision bar 1 and the connecting bar 2, for example, in the embodiment of fig. 5, the connecting bar 2 is inserted into a slot on the collision bar 1, and the thickness of the connecting bar 2 is greater than the size of the slot on the collision bar 1, so that the collision bar 1 and the connecting bar 2 are in an interference tight fit state, but under the action of a certain external force, the collision bar 1 and the connecting bar 2 can be separated; of course, a clamping groove structure can be formed at the end of the connecting rod 2, and the end of the collision rod 1 is inserted into the clamping groove structure, so that the collision rod 1 and the connecting rod 2 are in an interference tight fit state; alternatively, the collision bar 1 and the connecting rod 2 may be connected to each other in a tight manner and separated from each other by an external force.

It should be noted that the direction-selective detachable connection structure formed between the crash bar 1 and the connecting bar 2 is not limited to the above tight-fitting connection method, and other methods can be adopted; for example, one end of the collision bar 1 is tightly matched with one connecting rod 2, and the other end of the collision bar 1 is hinged with the other connecting rod 2, so that when the collision bar 1 rotates to the extreme position, one end of the collision bar 1 is separated from the connecting rod 2 and pivots around the other end of the collision bar 1 under the extrusion force of an operator, and an infinite avoidance space is formed. Or, the end of the collision bar 1 forms a dovetail groove structure with a small angle, and the corresponding part of the connecting rod 2 also forms a dovetail structure, so that the end of the collision bar 1 can be buckled with the connecting rod 2, and because the inner side surface of the dovetail groove structure has a small inclination angle, before the collision bar 1 rotates to the position of the limit position, the collision bar 1 can be well connected with the connecting rod 2, and when the collision bar 1 rotates to the limit position, the collision bar 1 can be separated from the connecting rod 2 and fall off under the extrusion force of an operator.

Compared with the technical scheme of triggering the alarm or stopping the equipment operation through the integral movement or rotation of the rigid rod in the prior art, the 'infinite avoidance space' is a technical scheme of triggering the alarm or stopping the equipment operation through the integral movement or rotation of the rigid rod, the rotation angle of the rigid rod is limited, the protection angle range given to an operator is small, however, the collision rod 1 can fall off at the limit position, and cannot obstruct the forward movement of the operator, so that the 'infinite avoidance space' can be called as an infinite avoidance space given to the operator. The "limit position" means a maximum rotational angle position that the impact lever 1 can reach as it rotates with the connecting rod 2.

In particular, referring to fig. 1, the connecting rod 2 may be hinged to handrails, guard rails, etc. on both sides of the control deck 3. As a more unique embodiment, the connecting rod 2 is hinged to the corresponding side of the console top 3 through the elastic damping element 5, that is, the connecting rod 2 is hinged to the armrests and guard rails on the two sides of the console top 3 through the elastic damping element 5, fig. 2 shows an example of the elastic damping element 5 using a spring hinge, one pivoting piece of the spring hinge is connected to the armrests and guard rails on the side of the console top 3, the other pivoting piece of the spring hinge is connected to one end of the connecting rod 2, and the other end of the connecting rod 2 is connected to the end of the collision rod 1, so that the collision rod 1 is installed between the two connecting rods 2.

Further, a fixing mechanism 6 may be installed at a handrail, a guard rail, etc. on both sides of the console top 3, and the connecting rod 2 is connected to the fixing mechanism 6 through an elastic damping element 5, in the embodiment shown in fig. 2, the elastic damping element 5 is a spring hinge, one pivoting piece of the spring hinge is connected to the fixing mechanism 6, the other pivoting piece of the spring hinge is connected to one end of the connecting rod 2, and the other end of the connecting rod 2 is connected to an end of the collision rod 1, so that the collision rod 1 is installed between the two connecting rods 2. Through setting up elastic damping element 5, do not suffer the extruded condition at collision pole 1, can make collision pole 1 keep initial condition, suffer the extruded condition at collision pole 1, can make collision pole 1 move towards the direction of keeping away from initial condition, after external force eliminates, can make collision pole 1 towards initial condition again and reset, realize the automatic re-setting function. Here, the "initial state" refers to a state in which the impact bar 1 is not subjected to the squeezing thrust of the operator.

Because the collision bar 1 is a movable part, the collision bar 1 usually shakes under the action of gravity or inertia of the equipment in the moving process, in order to prevent the collision bar 1 from being triggered by mistake, pretightening force can be applied to the elastic damping element 5, for example, a pretightening force is applied to the spring hinge, and the collision bar 1 cannot be triggered by mistake due to the pretightening force of the spring.

It should be noted that the elastic damping element 5 is not limited to the structure of the spring hinge, and other structures, such as a torsion spring or a gas spring, may also be adopted, and when the elastic damping element 5 adopts a torsion spring, the action principle of the torsion spring is similar to that of the spring hinge, and will not be described herein again; when elastic damping element 5 adopts the air spring, can set up the air spring between connecting rod 2 and fixed establishment 6, through the mode that makes the air spring be in certain compression state, make the air spring have certain pretightning force to prevent that collision pole 1 from producing the spurious triggering, under the condition that collision pole 1 suffers the extrusion, the air spring is compressed thereupon, after the extrusion force is eliminated, under the effect of the elastic force of air spring, collision pole 1 reverts to initial position.

In a specific embodiment, the connecting rod 2 is provided with a limiting block 7, and the limiting block 7 is located at one end of the connecting rod 2 connected with the elastic damping element 5, that is, the limiting block 7 is connected with one end of the connecting rod 2 opposite to the collision rod 1. The setting of stopper 7 for collision bar 1 highly is less than the pin joint of connecting rod 2 and control table top 3 highly in vertical direction, namely makes collision bar 1 highly be less than the pivot axis of elastic damping element 5 highly in vertical direction at the height of vertical direction, thereby makes collision bar 1 can only move down, can effectively avoid appearing collision bar 1 and move the potential safety hazard of extrusion operating personnel (especially more than the neck) upwards. Of course, the stopper 7 is also connected to the elastic damping member 5, and the impact lever 1, the connecting rod 2, and the stopper 7 rotate together about the pivot center axis of the elastic damping member 5.

Further, referring to fig. 4 and 5, the upper surface of the limiting block 7 may be an inclined surface, correspondingly, the limiting plate is installed at the upper end of the fixing mechanism 6, one end of the limiting plate is fixedly connected with the elastic damping element 5, and the other end of the limiting plate is used for limiting the position of the limiting block 7, so that the collision rod 1 is prevented from being pushed away from the initial position under the action of the elastic force of the elastic damping element 5, and meanwhile, the height of the collision rod 1 in the vertical direction is also ensured to be lower than the height of the hinge point of the connecting rod 2 and the control table top 3 in the vertical direction. Of course, the upper surface of the limiting block 7 is not limited to the design of an inclined plane, and may be a surface with other shapes, such as a convex curved surface, a wavy curved surface, etc., as long as the height of the collision bar 1 in the vertical direction is lower than the height of the hinge point of the connecting rod 2 and the control table top 3 in the vertical direction.

In particular embodiments, the position signal detection mechanism may take a variety of forms, which may employ a single position signal detection element. For example, the position signal detecting mechanism includes an operation signal detecting device that transmits a danger position signal when the crash bar 1 is moved to a danger position, and the control unit 4 controls the moving operation panel to brake or move toward a safety direction, such as a typical reverse movement. As a preferred embodiment, the anti-extrusion device of the mobile operation console of the present invention can employ two-stage position signal detection, specifically, referring to fig. 10 and 11, the position signal detection mechanism may include an early warning signal detection device and an operation signal detection device, wherein the early warning signal detection device transmits an early warning position signal when the collision rod 1 moves to an early warning position, and the control unit 4 of the mobile operation console controls the alarm to alarm; when an operator mistakenly touches the collision rod 1, the arrangement of the early warning signal detection device gives the operator a buffer distance, the mobile operation table is not stopped at the buffer distance, and the early warning signal detection device can remind the operator through an alarm; the operating signal detection means transmit a danger position signal when the crash bar 1 is moved further to a danger position, the control unit 4 controls the mobile operating platform to brake, at which time a stop of the mobile operating platform is triggered, or the control unit 4 controls the mobile operating platform to move towards a safe direction, for example typically in the reverse direction. The crash bar 1 is further rotated to provide a greater safety protection distance to the operator.

This kind of second grade signal detection form can prevent the maloperation to a certain extent on the one hand, and when operating personnel's health extrusion collision bar 1 pivot reachd the early warning position, the alarm is sent out in the control unit 4 control alarm, reminds operating personnel, and operating personnel can discover the fault action of oneself in time, corrects the action. On the other hand, the safety can be further improved, if the operator is passively pressed to incline forwards and downwards, and the collision rod 1 reaches a dangerous position, the control unit 4 controls the brake of the mobile operation platform to realize deceleration, and if necessary, even directly controls the mobile operation platform to move in reverse direction (before the operator bumps into an obstacle in reverse direction, the control unit controls the mobile operation platform to move in reverse direction and forwards), so that the operator can avoid the obstacle which bumps from the back, and the safety level is higher. That is to say, the anti-squeezing device adopts two-stage signals, the first stage is the early warning signal, and the second stage is the operation signal for controlling the brake or the reverse movement of the mobile operation platform, so that the control unit of the mobile operation platform has hierarchical judgment on the control operation of the mobile operation platform, thereby avoiding the influence on the normal operation of the mobile operation platform due to misoperation, and simultaneously ensuring that the safety of the anti-squeezing device of the mobile operation platform is higher.

Referring to fig. 4, specifically, fig. 4 shows an embodiment in which the warning signal detecting device and/or the operation signal detecting device employs a travel switch as a sensor, the travel switch is disposed on the fixing mechanism 6, such that a contact of the travel switch is located on a rotation track of the connecting rod 2, for example, the travel switch is disposed at a warning position, and when an operator presses the collision rod 1 unconsciously or by mistake to rotate the connecting rod 2 to the warning position and then collides with the contact of the travel switch, the travel switch transmits a warning position signal, referring to fig. 6, the control unit 4 controls the alarm to alarm, so as to remind the operator, and the operator can find his own faulty action in time to correct the action; or, the travel switch is arranged at a dangerous position, when an operator is impacted by a rear obstacle to press the collision rod 1, the connecting rod 2 is rotated to the dangerous position and collides with a contact of the travel switch, the travel switch transmits a dangerous position signal, and referring to fig. 6, the control unit 4 controls the mobile operation platform to brake or move towards a safe direction. Or, early warning signal detection device and operation signal detection device can also be set simultaneously, make early warning signal detection device and operation signal detection device arrange along the rotation orbit of connecting rod 2, if early warning signal detection device is located the initial position of the rotation scope of connecting rod 2/collision pole 1 when triggering, play the early warning effect, operation signal detection device is located the intermediate position of the rotation scope of connecting rod 2/collision pole 1 when triggering, be used for safety control, after connecting rod 2 touches with the contact of early warning signal detection device, continue to rotate, connecting rod 2 again touches with the contact of operation signal detection device, realize second grade position signal detection. The early warning signal detection device and/or the operation signal detection device can be arranged on the fixing mechanism 6 on one side only, and further the early warning signal detection device and/or the operation signal detection device can be arranged on the fixing mechanisms 6 on two sides, so that the early warning signal detection device and/or the operation signal detection device on one side are prevented from being out of order due to faults.

It should be noted that, the mobile operation platform belongs to a mobile operation machine or a mobile device, the control unit 4 of the mobile operation machine or the mobile device generally belongs to a conventional component, on this basis, the position signal detection mechanism of the present invention is electrically connected to the control unit 4, and the control unit 4 performs control operation based on the detection signal of the position signal detection mechanism, and the control unit 4 performs early warning control according to logic judgment, or reduces the valve output current, or directly cuts off, or outputs reverse current, so as to control the mobile operation platform to decelerate, brake, or move towards a safe direction, such as a reverse direction or a deflection direction, which is relatively mature in realization of control technology under the teaching of the technical idea of the present invention. Specifically, the early warning signal detection device and the operation signal detection device may be one of a photoelectric switch, a proximity switch, a travel switch, a hall sensor, an ultrasonic sensor, and a laser sensor, and relate to position detection transmission technologies such as a photoelectric switch, a proximity switch, a travel switch, a hall sensor, an ultrasonic sensor, and a laser sensor.

On the basis of the technical scheme of the anti-extrusion device, the invention also provides an aerial work machine, wherein the aerial work machine comprises the anti-extrusion device in any technical scheme.

While the basic embodiment and various preferred embodiments of the anti-crush device of the present invention have been described above in a hierarchical manner, in order to facilitate a more complete understanding of the technical concept and advantages of the anti-crush device of the present invention, the structural form of the anti-crush device of the present invention, which is relatively comprehensive in its preferred features, will be described below.

Referring to fig. 1 to 5, the illustrated anti-extrusion device adopts an impact bar 1, two ends of the impact bar 1 are respectively connected with a connecting rod 2 in a close fit manner, the connecting rod 2 is connected with a fixing mechanism 6 through an elastic damping element 5, the fixing mechanism 6 is arranged at two sides of a control table top 3, specifically, the fixing mechanism 6 is connected with guardrails or handrails at two sides of the control table top 3, a space is formed in the fixing mechanism 6 and is used for accommodating the elastic damping element 5, a limiting block 7 is further installed at the end part of the connecting rod 2, the limiting block 7 and the impact bar 1 are respectively located at two ends of the connecting rod 2, an early warning signal detection device and an operation signal detection device are further arranged in the fixing mechanism 6, and the early warning signal detection device and the operation signal detection device are arranged on a rotation track of the connecting rod 2 and can detect a rotation angle of the connecting rod 2; for example, when the early warning signal detection device is triggered, the connecting rod 2/the collision rod 1 is located at the initial position of the rotation range to play an early warning role, and when the operation signal detection device is triggered, the connecting rod 2/the collision rod 1 is located at the middle position of the rotation range to be used for safety control; the control unit 4 can perform control operation based on the moving position signal sent by the early warning signal detection device or the operation signal detection device, for example, the control unit 4 performs early warning control according to logic judgment, or reduces valve output current, or directly cuts off or outputs reverse current to control the moving operation platform to decelerate, brake or move towards a safe direction.

Referring to fig. 7 to 9, in the application process, an operator presses the collision rod 1, the collision rod 1 and the connecting rod 2 rotate around the pivot central shaft of the elastic damping element 5, the collision rod 1 and the connecting rod 2 trigger the early warning signal detection device when rotating to corresponding angles, the early warning signal detection device sends an early warning position signal to the control unit 4, the control unit 4 controls the alarm to give an alarm, if the misoperation of the operator occurs at the moment, the alarm can remind the operator, and the operator can find own misoperation in time and correct the action; if the operator who is located on the mobile operation platform receives the rear obstacle striking, collision pole 1 and connecting rod 2 trigger the operating signal detection device when rotating corresponding angle, and operating signal detection device sends dangerous position signal to control unit 4, and control unit 4 control mobile operation platform braking or move towards safe direction, if reverse motion. If because motion inertia, system failure or special circumstances etc. make operating personnel continue to suffer the extrusion, operating personnel can apply bigger extrusion to collision pole 1, makes collision pole 1 and connecting rod 2 take place to separate and drop to give operating personnel bigger dodge the space, infinitely dodge the space promptly, avoid causing the harm to operating personnel. Certainly, the tight fit connection between the collision rod 1 and the connecting rod 2 can be designed, when the stress is within a certain range, the collision rod 1 and the connecting rod 2 are not separated, and at the moment, the collision rod 1 and the connecting rod 2 do not rotate to the limit positions; when the collision rod 1 and the connecting rod 2 rotate to the extreme positions, the stress of the collision rod exceeds a threshold value, the collision rod 1 and the connecting rod 2 are separated, and an infinite avoidance space is formed; to a certain extent, an automatic reset function can be maintained.

It can be seen from the above description that, according to the invention, through the design of the close fit connection between the collision bar 1 and the connecting bar 2, and by using the rotation direction of the collision bar 1, a design for converting the rigid connection into an infinite avoidance space is formed, which not only takes into account the advantage of stable detection of the existing anti-extrusion device for triggering an alarm or stopping the operation of equipment through the integral movement or rotation of the rigid bar, but also provides the infinite avoidance space at the limit position, and makes up for the defects of the existing anti-extrusion device for triggering an alarm or stopping the operation of equipment through the integral movement or rotation of the rigid bar. Meanwhile, the height of the impact beam 1 in the vertical direction is designed to be lower than the hinge point position to provide a greater safety protection distance. Wherein, collision pole 1 upwards moves and is spacing through stopper 7, makes collision pole 1 be less than the hinge point position in the vertical direction to can only move down, avoid collision pole 1 upwards to move and have the potential safety hazard of extrusion operating personnel (especially above the neck).

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims (12)

1. An anti-extrusion device, comprising:

the movable mechanism comprises an impact rod (1) and connecting rods (2), wherein two ends of the impact rod (1) are correspondingly hinged with two sides of the control table board (3) through one connecting rod (2) respectively, so that the impact rod (1) can respond to extrusion thrust applied by an operator to enable the impact rod (1) to move and pivot from an initial state to a direction away from the operator; the height of the collision rod (1) in the vertical direction is lower than that of a hinged point of the connecting rod (2) and the control table top (3) in the vertical direction, so that the collision rod (1) can pivot downwards in response to the extrusion thrust applied to an operator;

a position signal detection mechanism installed to be able to detect and transmit a movement position signal of the impact bar (1) so that a control unit (4) can perform a control operation based on the movement position signal.

2. Anti-extrusion device according to claim 1, characterised in that the connecting rod (2) is hinged to the corresponding side of the control console (3) by means of an elastic damping element (5), the elastic damping element (5) being provided with an elastic force such that the impact bar (1) maintains the initial state or is reset towards the initial state.

3. Anti-extrusion device according to claim 2, characterized in that fixing means (6) are mounted on each side of the control console (3), the connecting rod (2) being hinged to the fixing means (6) through the elastic damping element (5).

4. Anti-extrusion device according to claim 2, characterized in that the elastic damping element (5) is a spring hinge, a torsion spring or a gas spring.

5. The anti-extrusion device according to any one of claims 1 to 4, wherein a stopper (7) is installed at an end of the connecting rod (2) opposite to the impact bar (1).

6. The device according to claim 5, characterized in that the upper surface of the stopper (7) is a bevel.

7. The extrusion preventing apparatus as defined in any one of claims 1 to 4, wherein both ends of the crash bar (1) form azimuth selective droppable connection structures with one of the connection bars (2), respectively, to enable the crash bar (1) to be detached from the connection bar (2) at an extreme position in response to an extrusion pushing force of an operator, thereby forming an infinite escape space.

8. The device according to claim 7, characterized in that the two ends of the crash bar (1) are connected with one of the connecting rods (2) with a tight fit.

9. The anti-extrusion device according to any one of claims 1 to 4, wherein the position signal detecting mechanism comprises an operation signal detecting means which transmits a danger position signal when the impact bar (1) is moved to a danger position, and the control unit (4) controls the mobile operation table to be braked or moved toward a safety direction.

10. The anti-extrusion device according to claim 9, wherein the position signal detection mechanism further comprises an early warning signal detection means which transmits an early warning position signal when the impact bar (1) moves to an early warning position, and the control unit (4) controls an alarm to give an alarm.

11. Anti-extrusion device according to claim 10, characterised in that at least one of the two sides of the control console (3) is equipped with the operating signal detection means and the pre-warning signal detection means.

12. An aerial work machine comprising an anti-racking device as claimed in any one of claims 1 to 11.

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