CN217838149U - Anti-extrusion device and aerial work machine - Google Patents

Abstract

The utility model discloses an anti-extrusion device and high altitude construction machinery, this anti-extrusion device includes the moving mechanism, fixed establishment and position signal detection mechanism, the moving mechanism includes the crash bar, crash bar both ends respectively with a fixed establishment swing joint and can slide rail orbit move, the slide rail includes first track and second track, be equipped with canceling release mechanical system between crash bar tip and the first track, so that crash bar makes the crash bar move from the initial condition towards keeping away from the operator direction in response to the extrusion thrust that the operator receives, after the extrusion thrust that receives disappears along with canceling release mechanical system automatic recovery to the initial condition, the second track is connected with the first track through the middle track, so that change the direction of movement and fall into the second track when the crash bar triggers extreme position; the position signal detecting mechanism is installed to be able to detect a movement position signal of the transmission collision bar, so that the control unit performs a control operation based on the movement position signal. The automatic reset device has the advantages of automatic reset function, larger safety distance, reliable structure and low cost.

Description

Anti-extrusion device and aerial work machine

Technical Field

The utility model relates to a safety device specifically relates to an anti-extrusion device. In addition, the high-altitude operation machine with the anti-extrusion device is further related.

Background

Install work platform usually on the lift operation machinery, work platform is used for holding the operator, can install the operation panel usually on the work platform to the operation panel is fixed and is followed the main direction of motion of machinery one side towards the place ahead at work platform, and the operator of being convenient for carries out corresponding operation.

With this type of equipment, there is a risk of crushing injury to the operator during operation; for example, in the process of moving an operation platform, if the operation is careless, a large-size obstacle behind the operation platform is not noticed, or an accidental falling object impacts behind the operation platform, the operation platform can be extruded and injured by surrounding obstacles during operation.

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. The prior art mobile operator station anti-jamming devices generally comprise the following types: (1) The flexible rope is matched with the magnetic adsorption type circuit breaker, and when an operator is extruded and injured, the magnetic adsorption switch is broken; (2) The push switch sends a signal when the pressure reaches a set value, and the rigid rod falls off at the same time; (3) The infrared laser sensor can send out signals when light is blocked; (4) The back is provided with a protective railing with higher height, so that physical protection of partial space is realized; (5) Protecting by pressing the broken circuit of the triggered press-touch switch; and (6) adopting a rain cover with a rigid pressure contact component. However, the above-mentioned prior art device for preventing the mobile operation table from being pressed has certain disadvantages in practical application.

For example, for an anti-extrusion device using a flexible rope in cooperation with a magnetic adsorption type circuit breaker, the circuit breaker is usually manually adsorbed to a magnet again after the circuit breaker falls off, and some operators even pull out the adsorption type circuit breaker automatically to avoid troubles, so that the anti-extrusion device cannot play a role in protection; for an anti-extrusion device which adopts a press switch and automatically drops a rigid rod when the pressure reaches a set value or an anti-extrusion device which adopts an extrusion triggering press-touch switch to break, the mechanism essentially adopts pressure detection, and the anti-extrusion device generally enables the rigid rod to automatically drop when the pressure reaches the set value and also needs manual operation to reset the rigid rod; to the extrusion preventing device who adopts rain-proof cover, though can resume the closed position with rain-proof cover to a certain extent comparatively conveniently, nevertheless, it is limited to trigger back safe distance.

That is, the above-mentioned prior art anti-squeezing device for a mobile operating platform cannot satisfy the requirements of the automatic reset function and the safety distance at the same time.

For another example, the anti-extrusion device using the infrared laser sensor may have an automatic reset function and a large safety distance, but relatively speaking, it is high in cost and low in reliability.

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

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an extrusion prevention device is provided, this extrusion prevention device has the automatic re-setting function, and safe distance is great, and the structure is reliable, and is with low costs.

In order to solve the technical problem, an aspect of the present invention provides an anti-extrusion device, which includes a moving mechanism, a fixing mechanism and a position signal detection mechanism, wherein the moving mechanism includes an impact rod, two ends of the impact rod are movably connected to the fixing mechanism respectively and can move along a track of a slide rail on the fixing mechanism, the slide rail includes a first track and a second track, a reset mechanism is disposed between an end of the impact rod and the corresponding first track, so that the impact rod can move from an initial state toward a direction away from an operator in response to an extrusion thrust applied to the operator, and automatically recover to the initial state along with the reset mechanism after the extrusion thrust applied to the operator disappears, and the second track is connected to the first track through an intermediate track, so that a moving direction of the impact rod can be changed when the impact rod triggers a limit position, and the impact rod falls into the second track;

the position signal detecting mechanism is installed to be able to detect and transmit a moving position signal of the impact bar so that a control unit can perform a control operation based on the moving position signal.

Optionally, the movable mechanism further comprises moving members, the moving members are respectively mounted at two ends of the collision rod, and the moving members are arranged in the corresponding sliding rails so as to be capable of moving along the tracks of the sliding rails.

Furthermore, the resetting mechanism is located in the first rail, one end of the resetting mechanism is abutted to the moving piece, and the other end of the resetting mechanism is abutted to the inner wall of the first rail.

Optionally, a buffer mechanism is arranged in the second track.

Specifically, the reset mechanism and the buffer mechanism are both springs.

Optionally, the slide rail is a direction conversion slide rail.

Optionally, the position signal detecting mechanism includes a signal detecting device, and the signal detecting device can detect and transmit the moving position signal of the collision bar to the control unit, so that the control unit controls the work platform to brake or move to the safe direction.

Further, the signal detection device includes a first signal trigger element installed on the fixing mechanism to be able to detect a movement position signal generated when the impact bar is subjected to a pressing thrust.

Still further, the signal detection device includes two first signal trigger elements arranged along a track direction of the first track;

wherein one of the first signal triggering elements is arranged at the early warning position, and the other of the first signal triggering elements is arranged at the triggering position.

The utility model discloses another aspect provides an aerial working machinery, including any one of the above-mentioned technical scheme prevent extrusion device.

Through the technical scheme, the beneficial effects of the utility model are as follows:

the utility model discloses set up the slide rail on fixed establishment to the slide rail is the sectional type slide rail, divide into first track and second track, is provided with canceling release mechanical system between the tip of bumping pole and the first track, when the operator receives extrusion thrust, can make the bumping pole move to the direction of keeping away from along the first track, after the extrusion thrust that receives disappears, under the effect of canceling release mechanical system, the bumping pole can resume the initial condition automatically, makes the anti-extrusion device have the automatic reset function; the second rail is arranged at the limit position, and when the collision rod triggers the limit position, the moving direction can be changed and the second rail can fall into the second rail, so that a larger safety space is provided.

Other features and advantages of the present invention will be described in detail 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 invention without limiting the scope of the invention to the drawings and the embodiments described below. In the drawings:

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

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

FIG. 3 is a cross-sectional view of an anti-extrusion device in accordance with an embodiment of the present invention;

FIG. 4 is a schematic circuit diagram of a specific form of the position signal detecting mechanism of the anti-squeezing device of the present invention;

FIG. 5 is one of the safety distance effects of the anti-squeezing device of the present invention, wherein the impact bar is in an unstressed state;

fig. 6 is a second schematic diagram illustrating the safety distance effect of the anti-squeezing device of the present invention, wherein the collision rod is under stress and triggers the limit position.

Description of the reference numerals

1 fixing mechanism 2 Collision rod

3 slide rail 31 first rail

32 second track 33 intermediate track

4 reset mechanism 5 control unit

6 moving part 7 buffer gear

8 first signal trigger element

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, and it should be understood that the embodiments described herein are merely for purposes of illustration and explanation, and the scope of the present invention is not limited to the following embodiments.

The terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, and therefore the features defined "first", "second" may explicitly or implicitly include one or more of said features.

In the description of the present invention, it should be understood that, for the convenience of description of the present invention and simplification of description, the terms "front", "rear", "left" and "right" relate to the traveling direction of the aerial work machine, and generally, the aerial work machine travels forward while heading forward, and the two sides thereof are left and right sides; accordingly, with the anti-crush device, the front-rear left-right direction of the anti-crush device substantially coincides with the front-rear left-right direction of the vehicle. Accordingly, the terminology is based on the orientations and positional relationships illustrated in the drawings, and is 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 is therefore not to be construed as limiting the present invention; furthermore, the directional terms of the present invention should be understood in conjunction with the actual installation state.

It should be noted that the utility model discloses an operation platform refers to the confession operating personnel that has on all kinds of machinery or equipment broadly and controls, drives, control platform position or region, including but not limited to the operation platform of high altitude construction machinery, the well accuse platform of concrete equipment, the driving operation district of fork truck etc. that mill or other occasions adopted etc. as long as it has above-mentioned type's operation platform, and adopted the utility model discloses a prevent extrusion device's technical scheme, it all should belong to the utility model discloses a protection scope.

Referring to fig. 1 to 4, a basic embodiment of the present invention provides an anti-extrusion device, including a movable mechanism, a fixing mechanism 1 and a position signal detection mechanism, where the movable mechanism includes an impact bar 2, two ends of the impact bar 2 are respectively movably connected to one of the fixing mechanisms 1 and can move along a track of a slide rail 3 on the fixing mechanism 1, the slide rail 3 includes a first rail 31 and a second rail 32, a reset mechanism 4 is disposed between an end of the impact bar 2 and the first rail 31, so that the impact bar 2 can move from an initial state toward a direction away from an operator in response to an extrusion thrust applied to the operator, and automatically recover to the initial state along with the reset mechanism 4 after the extrusion thrust applied disappears, and the second rail 32 is connected to the first rail 31 through a middle rail 33, so that the moving direction of the impact bar 2 can be changed and fall into the second rail 32 when the impact bar 2 triggers a limit position;

the position signal detecting mechanism is installed to be able to detect and transmit a movement position signal of the impact bar 2 so that the control unit 5 can perform a control operation based on the movement position signal.

In order to facilitate understanding, the technical scheme of the utility model discloses a prevent extrusion device, it is specifically explained in being applied to concrete work platform with it below the utility model discloses a prevent extrusion device's technological effect.

High altitude construction mechanical equipment belongs to manned equipment, adopts work platform to carry on operating personnel usually, can install the control cabinet on work platform, as shown in fig. 1, the utility model discloses an prevent that extrusion device installs in the control cabinet top, specifically, can install on work platform, install fixed establishment 1 on positions such as handrail, rail guard, be provided with slide rail 3 on the fixed establishment 1, in the slide rail 3 of a fixed establishment 1 was stretched into respectively at the both ends of crash bar 2, make crash bar 2 can remove along the orbit of slide rail 3 under the condition of atress. Since the connection structure between both ends of the impact bar 2 and the fixing mechanism 1 is substantially the same, one end will be mainly described as an example in the following embodiments.

Specifically, the slide rail 3 is composed of a first rail 31, an intermediate rail 33, and a second rail 32, the first rail 31, the intermediate rail 33, and the second rail 32 are connected in sequence, and the track of the first rail 31 and the track of the second rail 32 have different directions; a reset mechanism is arranged between the end part of the collision rod 2 and the first track 31, when an operator receives rear extrusion thrust, the operator can extrude the collision rod 2, the collision rod 2 overcomes the acting force of the reset mechanism 4 and moves from an initial state to a direction away from the operator in the track of the first track 31, and after the extrusion thrust disappears, the collision rod 2 moves and returns to the initial state under the action of the reset mechanism 4, so that the reset mechanism has a reset function; wherein, the initial state is the position and state of the collision bar 2 when not receiving extrusion thrust; if the equipment does not stop acting in time when the operator receives extrusion thrust from the rear, the operator continues to be extruded by the barrier until the operator reaches the limit position of the reset mechanism 4, namely the collision rod 2 triggers the limit position, and the moving direction of the collision rod 2 is changed because the track of the second track 32 is different from the track of the first track 31 in direction, so that the collision rod 2 falls into the second track 32, the space which can be extruded is avoided, more avoidance space is provided for the operator, and a larger safety distance is provided; the structure is reliable and simple on the whole, the cost is low, and the application range is wide.

With regard to the specific structure of the slide rail 3, the slide rail 3 belongs to a slide rail capable of switching directions, the track of the slide rail 3 is specially designed, the direction of the track of the second track 32 is different from that of the track of the first track 31, the change of the moving direction of the collision rod 2 caused by the switching of the track direction avoids the space which can be extruded, more avoidance space is provided for operators, and even if the system fails or special conditions occur, the maximized avoidance space can be realized by the switching of the slide rail direction.

In particular, fig. 3 provides a specific structure of the slide rail 3, in the embodiment of fig. 3, the middle rail 33 is an arc rail, the first rail 31 extends substantially along the horizontal direction, and the second rail 32 extends substantially along the vertical direction, so that the purpose of changing the rail direction can be achieved. Certainly, the extending direction of the first rail 31 is not limited to the horizontal direction, and the first rail 31 may also be inclined upward by a certain angle, and the reset mechanism 4 has a certain pretightening force to prevent the impact bar 2 from sliding downward along the first rail 31 under the action of its own gravity, so that the anti-extrusion device can be prevented from being triggered by mistake, and the impact bar 2 can be moved along the first rail 31 conveniently.

The slide rail 3 may also have other specific structural forms, for example, the first rail 31, the middle rail 33, and the second rail 32 are all arc-shaped rails, so that the slide rail 3 is an upper arc-shaped rail as a whole, and the purpose of changing the rail direction is achieved. Or, the middle rail 33 is a rail having a right-angle turn, so that the first rail 31, the middle rail 33 and the second rail 32 are sequentially connected to form an L-shaped rail, thereby achieving the purpose that the rail direction can be changed; the inner diameter of the second rail 32 is set larger so that the crash bar 2 can fall into the second rail 32 when the operator continues to be pressed by the obstacle until the limit position of the restoring mechanism 4 is reached.

In one embodiment, a buffer mechanism 7 may be provided in the second rail 32, and when the collision bar 2 falls into the second rail 32, the buffer mechanism 7 can buffer the collision bar 2 to prevent the operator from receiving a secondary injury.

Specifically, the return mechanism 4 and the buffer mechanism 7 may be elastic elements capable of providing elastic force, such as elastic elements made of elastic materials such as rubber and silicone, and are preferably springs.

In the above embodiments, the description has been mainly given of the embodiment in which the end of the impact bar 2 extends into the slide rail 3 of the fixing mechanism 1, but as for the connection manner between the end of the impact bar 2 and the fixing mechanism 1, it is not limited to the manner in which the end of the impact bar 2 directly extends into the slide rail 3 of the fixing mechanism 1, and the moving member 6 may be mounted on the end of the impact bar 2, specifically, referring to fig. 3, the moving member 6 is mounted on each of the two ends of the impact bar 2, and the moving member 6 is disposed in the corresponding slide rail 3 and can move along the track of the slide rail 3. Furthermore, the reset mechanism 4 is located in the first rail 31, one end of the reset mechanism 4 abuts against the moving member 6, and the other end thereof is fixedly connected with the inner wall of the first rail 31. Wherein, the moving member 6 may be a moving element such as a slider or a roller. The moving part 6 ensures that the collision rod 2 stably moves in the slide rail 3, so that the collision rod 2 is lower than the chest of an operator in the vertical direction and only can move downwards, and the safety problem of extruding an operator (particularly above the neck) in a rotating motion mode of the collision rod 2 can be prevented.

In order to avoid shaking of the collision rod 2 under the action of gravity and inertia in the moving process, certain pretightening force can be applied to the reset mechanism 4 during assembly, so that the collision rod 2 cannot be triggered mistakenly. The accidental misoperation of the operator can be effectively prevented, the accidental misoperation or the unwanted action and the unintentional action are basically slight, the operator can find the existence of elastic resistance in time when touching the collision rod 2 by mistake, and the misoperation or the unwanted action and the unintentional action can be corrected in time, so that the accidental misoperation of the operator can be basically prevented, the working stability of the working platform is effectively improved, and the normal construction operation of the working platform is ensured.

On the basis of the above embodiment of the utility model, position signal detection mechanism can adopt multiple form, and it can adopt single signal detection device, monitors slide mechanism's position change, perhaps, also can adopt a plurality of signal detection device, monitors collision bar 2's position change simultaneously, when reaching trigger state, and transmission signal makes the braking of 5 control operation platforms of the control unit or move towards safe direction, for example typically reverse motion.

Specifically, referring to fig. 3, the signal detection device may include a first signal trigger element 8, the first signal trigger element 8 is installed on the top of the fixing mechanism 1, and when the collision bar 2 is pushed by the extrusion, the first signal trigger element 8 approaches an inner wall in front of the slide rail 3 of the fixing mechanism 1, so that the first signal trigger element 8 detects a movement position signal and transmits the movement position signal to the control unit 5, and the control unit 5 controls the work platform to brake or move in a safe direction according to the movement position signal. Of course, the first signal trigger element 8 may also be installed on a side wall in front of or behind the slide rail 3, and by detecting whether the collision bar 2 approaches the side wall in front of the slide rail 3 or leaves the side wall behind the slide rail 3, the first signal trigger element 8 detects a movement position signal and transmits the movement position signal to the control unit 5, and the control unit 5 controls the work platform to brake or move in the safe direction according to the movement position signal. Wherein, the first signal trigger element 8 may be a proximity switch in particular.

In practical design, a triggering position is defined according to the moving position of the impact bar 2, and when the impact bar 2 moves to the triggering position, the operator is considered to be at risk of being squeezed, and the work platform needs to be controlled to brake or move towards a safe direction. For example, a triggering position can be set on the fixing mechanism 1, and the first signal triggering element 8 is installed at the triggering position, when the collision rod 2 is detected to move to the triggering position, a moving position signal generated by the movement of the collision rod 2 is transmitted to the control unit 5, so that the control unit 5 controls the work platform to brake or move towards a safe direction according to the moving position signal; wherein, only one first signal trigger component 8 can be arranged, and only the position change of one end of the collision rod 2 is detected (because the two ends of the collision rod 2 can move when an operator presses the collision rod 2, only one first signal trigger component 8 is adopted to detect the moving position signal of the collision rod 2), or one first signal trigger component 8 can be respectively arranged on the fixing mechanisms 1 at the two sides according to the requirement, so that the realization of the function is prevented from being influenced by the damage of one first signal trigger component 8.

Further, an early warning position may be set, where the early warning position means that the collision bar 2 has not moved to the trigger position, but is set to prevent an unintentional misoperation of an operator, so that the misoperation can be effectively avoided, and the safety level is higher. Specifically, two first signal trigger elements 8 are sequentially arranged on the fixing mechanism 1 on one side, wherein one first signal trigger element 8 is installed at a position close to the rear side wall of the slide rail 3, and the other first signal trigger element 8 is installed at a middle position of the horizontal movement range or a position close to the front side wall of the slide rail 3. When an operator unconsciously squeezes the collision rod 2 to move the collision rod 2 to the early warning position, the moving position signal generated by the movement of the collision rod 2 is transmitted to the control unit 5, so that the control unit 5 controls the alarm lamp or the alarm to send out warning information according to the moving position signal to remind the operator and avoid false triggering. Alternatively, one first signal triggering element 8 may be provided on each of the fixing mechanisms 1 on both sides, wherein one first signal triggering element 8 is installed at a position close to the rear side wall of the slide rail 3, and the other first signal triggering element 8 is installed at a position in the middle of the horizontal movement range or at a position close to the front side wall of the slide rail 3.

In one embodiment, a second signal triggering member (not shown) may be further provided, and the second signal triggering member is mounted on a sidewall of the second rail 32 to detect whether the crash bar 2 falls into the second rail 32, and when it is detected that the crash bar 2 has fallen into the second rail 32, a signal is sent to the control unit 5, and the control unit 5 controls an output signal to the solenoid valve to control actions of the respective components, including a sudden stop and a reverse action, to prevent a secondary injury. Wherein, the second signal trigger element can adopt a proximity switch.

It should be noted that the work platform belongs to portable work machine or mobile device, and its the control unit generally belongs to conventional part at portable work machine or mobile device, on this basis, will the utility model discloses a position signal detection mechanism electric connection to the control unit to make the control unit control the operation based on position signal detection mechanism's detected signal, under the teaching of the utility model discloses technical concept, this is relatively mature in the realization of control technology.

Furthermore, the first signal triggering element 8 and the second signal triggering element can be inductive or contact sensors, such as photoelectric switches, proximity switches, travel switches, hall sensors, ultrasonic sensors, laser sensors, etc. The position detection and transmission technologies such as a photoelectric switch, a proximity switch, a travel switch, a hall sensor, an ultrasonic sensor, a laser sensor and the like are generally applied at present, the application forms are various, the circuit connection and the application are relatively mature, and the redundant application forms are not repeated for example.

Referring to fig. 4, fig. 4 shows a specific form adopted by the position signal detecting mechanism of the anti-squeezing device of the present invention, the position signal detecting mechanism transmits the moving position signal generated by the movement of the collision rod 2 to the control unit 5, the control unit 5 performs early warning control according to logic judgment, or the valve output current is reduced, or directly cut off, or reverse current is output, and the output signal is sent to the solenoid valve to control the action of each component, so as to control the moving operation platform to decelerate, brake, or move towards the safe direction, such as the reverse or deflection direction movement.

The utility model discloses on the above-mentioned technical scheme's of preventing extrusion device basis, the utility model also provides an aerial working machinery, wherein, it includes any one of above-mentioned technical scheme prevent the extrusion device.

In order to facilitate the more profound understanding of the technical conception and advantages of the anti-squeezing device of the present invention, the following description is made with reference to fig. 1 to 6 to describe the structural form of the anti-squeezing device with relatively comprehensive preferred features of the present invention.

The two fixing mechanisms 1 are respectively installed on handrails, guard rails and the like on two sides of the operation platform, the sliding rails 3 are arranged on the fixing mechanisms 1, each sliding rail 3 is formed by sequentially connecting a first rail 31, a middle rail 33 and a second rail 32, the track of each first rail 31 extends along the horizontal direction, the track of each middle rail 33 is an arc-shaped rail, and the track of each second rail 32 extends along the vertical direction. The two ends of the collision rod 2 are respectively provided with a moving member 6, the moving member 6 is arranged in the slide rail 3, the first rail 31 is provided with a reset mechanism 4, the reset mechanism 4 is preferably a spring, one end of the reset mechanism 4 is abutted against the moving member 6, the other end of the reset mechanism is fixedly connected with the inner wall in front of the first rail 31, and the reset mechanism 4 can apply certain pretightening force to avoid false triggering caused by shaking of the collision rod 2 under the action of gravity and inertia in the moving process or avoid unconscious misoperation of an operator; on the other hand, after the external extrusion force is eliminated, the reset mechanism 4 can drive the collision rod 2 to recover to the initial state, so that automatic reset is realized, and the trouble that the extrusion-proof device in the prior art needs to be installed again or reset can be effectively avoided, and the extrusion-proof device in the prior art sometimes has delay in overhaul or is idle by an operator for reinstallation, so that the safety of the operator cannot be ensured; the second rail 32 is provided with a damper mechanism 7. The fixing mechanism 1 on each side is respectively provided with a first signal trigger element 8, one first signal trigger element 8 is arranged at a trigger position, the other first signal trigger element 8 is arranged at an early warning position, when an operator is extruded by a rear obstacle to squeeze the collision rod 2, and when the collision rod 2 is detected to move to the trigger position, the first signal trigger element 8 at the trigger position transmits a moving position signal generated by the movement of the collision rod 2 to the control unit 5, so that the control unit 5 controls the operation platform to brake or move towards a safety direction according to the moving position signal; when the collision rod 2 is pushed to move by unconscious misoperation of an operator, the collision rod 2 moves to an early warning position, the first signal trigger element 8 at the early warning position can send out an early warning signal, the operator is reminded through an alarm, and normal operation activity is guaranteed, wherein the first signal trigger element 8 and the second signal trigger element can be induction type or contact type sensors, such as a photoelectric switch, a proximity switch, a travel switch, a Hall sensor, an ultrasonic sensor, a laser sensor and the like.

Through the utility model discloses an above-mentioned description can see out, receives when coming from the extrusion of obstacle behind the back at the operator, and the operator can exert an extrusion thrust to collision pole 2, owing to set up the spring in first track 31, under the spring action, collision pole 2 removes the in-process in first track 31, can automatic re-setting after extrusion thrust disappears, need not the manual work and resets. Moreover, if the apparatus does not stop operating in time, the movement direction of the impact bar 2 changes due to the change of the track direction, even if the impact bar 2 falls into the second track 32, the space that can be squeezed is avoided, and more space is provided for the operator to avoid. The early warning position can also be set up, the function of preventing mistake and touching can be provided, can trigger the early warning after collision pole 2 removes a section distance, avoids the maloperation, and the security level is higher. The utility model discloses an anti-extrusion device adopts mechanical type, removes in slide rail 3, and the structure is reliable, and is with low costs, and application scope is wide, and the part lectotype is many, and the lectotype such as spring, sensor is wide. The installation is independent, and the dismouting is simple and easy, and it is convenient to maintain.

The above description is provided for the preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and the technical idea of the present invention can be implemented by various simple modifications, which all belong to the protection scope of the present invention.

It should be noted that the various features described in the foregoing embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

In addition, various embodiments of the present invention can be arbitrarily combined with each other, and the disclosed content of the present invention should be considered as the same as long as it does not violate the idea of the present invention.

Claims (10)

1. The utility model provides an anti-extrusion device, characterized in that, includes movable mechanism, fixed establishment (1) and position signal detection mechanism, movable mechanism includes collision bar (2), the both ends of collision bar (2) respectively with one fixed establishment (1) swing joint and can follow the orbit of slide rail (3) on the fixed establishment (1) removes, slide rail (3) include first track (31) and second track (32), the tip of collision bar (2) and corresponding be provided with canceling release mechanical system (4) between first track (31), so as to make collision bar (2) respond to the extrusion thrust that the operator receives and make collision bar (2) move from initial condition towards keeping away from the direction of operator, and when the extrusion thrust that receives disappears along with canceling release mechanical system (4) automatic recovery to initial condition, second track (32) are connected with first track (31) through middle track (33), so as to make collision bar (2) trigger limit position when changing the removal direction and fall into second track (32);

the position signal detection mechanism is installed to be able to detect and transmit a movement position signal of the impact bar (2) so that a control unit (5) can perform a control operation based on the movement position signal.

2. The extrusion prevention device according to claim 1, wherein the movable mechanism further comprises a moving member (6), the moving member (6) is mounted at both ends of the impact bar (2), and the moving member (6) is disposed in the corresponding slide rail (3) to be movable along a track of the slide rail (3).

3. Anti-extrusion device according to claim 2, characterised in that the return mechanism (4) is located inside the first track (31) and that one end of the return mechanism (4) abuts against the moving member (6) and the other end abuts against the inner wall of the first track (31).

4. Anti-extrusion device according to claim 1, characterised in that a damping mechanism (7) is arranged in the second track (32).

5. Anti-squeezing device according to claim 4, characterized in that both the return mechanism (4) and the damping mechanism (7) are springs.

6. Anti-extrusion device according to claim 1, characterised in that the slide (3) is a direction-shifting slide.

7. The anti-extrusion device according to any one of claims 1 to 6, wherein the position signal detecting mechanism comprises a signal detecting means capable of detecting and transmitting a movement position signal of the impact bar (2) to the control unit (5) so that the control unit (5) controls a work platform to be braked or moved in a safe direction.

8. The device according to claim 7, characterized in that the signal detection means comprise a first signal triggering element (8), the first signal triggering element (8) being mounted on the fixing means (1) so as to be able to detect a displacement position signal generated when the impact bar (2) is subjected to the squeezing thrust.

9. An anti-squeeze device according to claim 8, characterized in that the signal detection means comprises two first signal trigger elements (8), the two first signal trigger elements (8) being arranged in the track direction of the first track (31);

wherein one of the first signal triggering elements (8) is arranged in the early warning position and the other first signal triggering element (8) is arranged in the triggering position.

10. An aerial work machine comprising an anti-extrusion device as claimed in any one of claims 1 to 9.

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