Anti-extrusion device and aerial work machinery

Abstract

The present invention relates to a safety protection device, and discloses an anti-squeezing device and aerial work machinery, the anti-squeezing device includes a movable mechanism, which includes a collision rod and a connecting rod, the two ends of the collision rod are respectively hinged to the two sides of the control console surface through a connecting rod, so that the collision rod can respond to the extrusion thrust of the operator and move and pivot from the initial state toward the direction away from the operator; the height of the collision rod in the vertical direction is lower than the height of the hinge point of the connecting rod and the control console surface in the vertical direction, so that the collision rod can pivot downward in response to the extrusion thrust of the operator; a position signal detection mechanism is installed to detect and transmit the moving position signal of the collision rod, so that the control unit can perform control operations based on the moving position signal. The anti-squeezing device of the present invention allows the collision rod to move only downward, ensuring the safety of the operator.

Description

Technical Field

[0001] The present invention relates to a safety protection device, in particular to an anti-extrusion device and also to an aerial work machine having the anti-extrusion device. Background Art

[0002] A mobile operating platform is usually installed on a lifting operation machine. The mobile operating platform is used to accommodate the operator. A control console is usually installed on the mobile operating platform, and the control console is fixed on the front side of the mobile operating platform along the main movement direction of the machine to facilitate the operator to perform corresponding operations.

[0003] For this type of equipment, during operation or construction, due to the complex working environment, these equipment fail to notice large obstacles behind them when moving backwards or reversing, or there are unexpected falling objects at the rear, which will cause great crushing injuries to the operators in the mobile operating platform, and even cause casualties. For example, in the process of moving the mobile working platform, if the aerial work machinery (tower crane, elevator, etc.) is operated carelessly and the obstacles behind are not noticed, the operators may be crushed and injured by the surrounding obstacles during operation.

[0004] In view of the above risks, those skilled in the art have designed various types of anti-squeezing devices for mobile operating platforms to reduce or avoid harm to operators. For example, (1) a push-type switch that sends a signal when the pressure reaches a set value; (2) a pressure-touch switch that is triggered by squeezing to disconnect the circuit for protection, etc. However, the above-mentioned mobile operating platform anti-squeezing devices in the prior art have certain deficiencies in practical applications.

[0005] For the anti-crushing device which uses a push-type switch and disconnects the switch when the pressure reaches the set value, or the anti-crushing device which uses an extrusion-triggered pressure-touch switch to disconnect the circuit, this type of mechanism essentially uses an anti-crushing device that triggers an alarm or stops the operation of the equipment by moving or rotating a rigid rod as a whole. The rigid rod usually has a higher installation position. When there is an instantaneous collision and impact from an obstacle, considering that the operator is generally not very tall, the area above the chest of the operator may sometimes be squeezed by the rigid rod, such as the area above the neck of the operator, which poses a great threat to the personal safety of the operator.

[0006] In view of this, it is necessary to design a new anti-extrusion device that can overcome the above technical difficulties and effectively solve or alleviate the above technical difficulties. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide an anti-extrusion device, which can make the collision rod move only downward, thereby ensuring the safety of the operator.

[0008] In order to solve the above technical solution, the first aspect of the present invention provides an anti-extrusion device, including a movable mechanism, which includes a collision rod and a connecting rod, and the two ends of the collision rod are respectively hinged to the two sides of the control console surface through one of the connecting rods, so that the collision rod can respond to the extrusion thrust exerted by the operator and make the collision rod move and pivot from an initial state toward a direction away from the operator; the height of the collision rod in the vertical direction is lower than the height of the hinge point of the connecting rod and the control console surface in the vertical direction, so that the collision rod can pivot downward in response to the extrusion thrust exerted on the operator; a position signal detection mechanism is installed to detect and transmit the moving position signal of the collision rod, so that the control unit can perform control operations based on the moving position signal.

[0009] Optionally, the connecting rod is hinged to a corresponding side of the control console surface via an elastic damping element, and the elastic damping element is configured to have an elastic force that enables the collision rod to maintain the initial state or reset toward the initial state.

[0010] Further optionally, fixing mechanisms are respectively installed on both sides of the control console surface, and the connecting rod is hinged to the fixing mechanism through the elastic damping element.

[0011] Specifically and optionally, the elastic damping element is a spring hinge, a torsion spring or a gas spring.

[0012] Optionally, a limit block is installed at one end of the connecting rod opposite to the collision rod.

[0013] Specifically, the upper surface of the limiting block is an inclined surface.

[0014] Optionally, both ends of the collision rod respectively form an orientation-selectable detachable connection structure with one of the connecting rods, so that the collision rod can be disengaged from the connecting rod at an extreme position in response to the squeezing thrust of the operator, thereby forming an infinite avoidance space.

[0015] Optionally, both ends of the collision rod are tightly connected to one of the connecting rods respectively.

[0016] Optionally, the position signal detection mechanism includes an operation signal detection device, and the operation signal detection device transmits a dangerous position signal when the collision rod moves to a dangerous position, and the control unit controls the mobile operating platform to brake or move in a safe direction.

[0017] Furthermore, the position signal detection mechanism also includes a warning signal detection device, and the warning signal detection device transmits a warning position signal when the collision rod moves to the warning position, and the control unit controls the alarm to sound an alarm.

[0018] Specifically, the operation signal detection device and the warning signal detection device are installed on at least one of the two sides of the control console surface.

[0019] A second aspect of the present invention provides an aerial work machine, comprising the anti-extrusion device described in any one of the above technical solutions.

[0020] Through the above technical scheme, the present invention cleverly designs the collision rod and the connecting rod to form an orientation-selective detachable connection structure. When the operator is squeezed, the operator applies a squeezing force to the collision rod. At this time, the collision rod and the connecting rod are fixedly connected together. As the collision rod and the connecting rod pivot, when the collision rod rotates to the extreme position, due to movement inertia, system failure or special circumstances, the operator is still squeezed. At this time, under the action of the squeezing force of the operator's body, the collision rod and the connecting rod can be separated and detached, giving the operator unlimited avoidance space to avoid damage to the operator. At the same time, because the two ends of the collision rod are respectively hinged to the two sides of the control console through a connecting rod, even if the mobile operating table shakes or vibrates, the stability of the detection of the rotation position of the collision rod can be guaranteed, avoiding frequent alarms, and even causing the mobile operating table to frequently stop or start operations.

[0021] In addition, an elastic damping element is provided between the connecting rod and the control console surface, which can, to a certain extent, prevent the operator from accidentally touching the collision rod and causing an alarm, and can also reset the collision rod.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but the protection scope of the present invention is not limited to the following drawings and specific embodiments. In the drawings:

[0024] Figure 1 is a schematic diagram of the installation of the anti-extrusion device in a specific embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the three-dimensional structure of the anti-extrusion device in a specific embodiment of the present invention;

[0026] Figure 3 is a schematic structural diagram of an anti-extrusion device in a specific embodiment of the present invention;

[0027] Figure 4 yes Figure 3 Sectional view along line AA;

[0028] Figure 5 It is a dynamic demonstration diagram of the anti-extrusion device in a specific embodiment of the present invention;

[0029] Figure 6 It is a circuit schematic diagram of a specific form adopted by the position signal detection mechanism of the anti-extrusion device of the present invention;

[0030] Figure 7 This is one of the schematic diagrams of the process of the anti-extrusion device falling off at the extreme position in the specific embodiment of the present invention;

[0031] Figure 8 This is the second schematic diagram of the falling process of the anti-extrusion device in the specific embodiment of the present invention at the extreme position;

[0032] Fig. 9 This is the third schematic diagram of the falling process of the anti-extrusion device in the specific embodiment of the present invention at the extreme position;

[0033] Fig.10 It is one of the schematic diagrams of the squeezing and collision process between the operator and the collision rod in the specific implementation mode of the present invention;

[0034] Fig.11 This is the second schematic diagram of the squeezing and colliding process between the operator and the collision rod in the specific implementation manner of the present invention.

[0035] Description of Reference Numerals

[0036] 1 collision rod 2 connecting rod

[0037] 3 console panels 4 control units

[0038] 5 elastic damping element 6 fixing mechanism

[0039] 7 Limit block DETAILED DESCRIPTION

[0040] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and the protection scope of the present invention is not limited to the following specific embodiments.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the description of the present invention, it is necessary to understand that the orientation terms are based on the orientation of the anti-extrusion device itself, which is roughly the same as the orientation of the anti-extrusion device installed in the mobile operating table; the orientation or position relationship shown in the accompanying drawings is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, it should be noted that the mobile operating platform of the present invention generally refers to the operating position or area on various types of machinery or equipment for operators to control, drive, and operate, including but not limited to the operating platform of aerial work machinery, the central console of concrete equipment, the driving and operating area of ​​forklifts used in factories or other occasions, etc. As long as it has the above-mentioned type of working platform and adopts the technical solution of the anti-extrusion device of the present invention, it should fall within the scope of protection of the present invention.

[0044] refer to Figures 1 to 5 The basic embodiment of the present invention provides an anti-extrusion device, which includes a movable mechanism, the movable mechanism includes a collision rod 1 and a connecting rod 2, the two ends of the collision rod 1 are respectively hinged to the two sides of the control console surface 3 through one of the connecting rods 2, so that the collision rod 1 can respond to the extrusion thrust suffered by the operator and make the collision rod 1 move and pivot from an initial state toward a direction away from the operator; the height of the collision rod 1 in the vertical direction is lower than the height of the hinge point of the connecting rod 2 and the control console surface 3 in the vertical direction, so that the collision rod 1 can pivot downward in response to the extrusion thrust suffered by the operator; and a position signal detection mechanism, which is installed to detect and transmit the movement position signal of the collision rod 1, so that the control unit 4 can perform control operations based on the movement position signal.

[0045] In order to facilitate understanding of the technical solution of the anti-extrusion device of the present invention, the technical effect of the anti-extrusion device of the present invention is specifically described below by applying it to a mobile operating table.

[0046] Aerial work machinery and equipment are manned equipment, usually using a mobile operating platform to carry operators, and a control console will be installed on the mobile operating platform, such as Figure 1 As shown, the anti-extrusion device of the present invention is installed above the control panel 3 of the control panel, and specifically, can be installed on the control panel 3, such as a handrail, a guardrail, etc. Since the structures of both ends of the anti-extrusion device are the same, the following mainly takes one end as an example for description.

[0047] In the above technical solution, the present invention designs the vertical height of the collision rod 1 to be lower than the vertical height of the hinge point of the connecting rod 2 and the control console surface 3, so that when the operator is hit by an instantaneous collision with an obstacle, the collision rod 1 can only move downward, eliminating the potential safety hazard of the collision rod 1 moving upward and squeezing the operator (especially above the neck). Moreover, the collision rod 1 is installed at the hinge point through the connecting rod 2, and the collision rod 1 is lower than the hinge point in the vertical direction, which can provide a larger safety protection distance.

[0048] Furthermore, both ends of the collision rod 1 form a directional selectable detachable connection structure with one of the connecting rods 2, so that the collision rod 1 can be disengaged from the connecting rod 2 at the extreme position in response to the squeezing thrust of the operator, thereby forming an infinite avoidance space.

[0049] The present invention ingeniously forms a directional selectable detachable connection structure at both ends of the connecting rod 2 and the collision rod 1. Compared with the existing anti-extrusion device that triggers an alarm or stops the operation of the equipment by moving or rotating the rigid rod as a whole, the setting of the directional selectable detachable connection structure can achieve the following functional relationship when the operator is squeezed: before the connecting rod 2 and the collision rod 1 pivot to the extreme position, the connecting rod 2 and the collision rod 1 are fixedly connected and not separated, forming a rigid connection form. After the collision rod 1 rotates to the vicinity of the extreme position, the operator is still squeezed due to movement inertia, system failure or special circumstances. At this time, under the action of the squeezing force of the operator's body, the collision rod 1 can be separated and detached from the connecting rod 2, thereby giving the operator unlimited avoidance space and avoiding damage to the operator. For those skilled in the art, any component on a mobile operating platform (especially aerial work machinery) should be as stable as possible. Therefore, the anti-extrusion device of the present invention connects the two ends of the collision rod 1 to the connecting rod 2 respectively. When the collision rod 1 and the connecting rod 2 are not separated, the anti-extrusion device has good stability as a rigid structure, which is convenient for detecting the moving position signal of the collision rod 1. It can be seen that the anti-extrusion device of the present application utilizes the orientation-selective detachable connection form formed between the collision rod 1 and the connecting rod 2 and the rotation orientation of the collision rod 1 to form a design that converts a rigid connection into an infinite avoidance space, which can not only have detection stability, but also provide infinite avoidance space at the extreme position, giving the operator safety protection.

[0050] Specifically, refer to Figure 5 The collision rod 1 and the connecting rod 2 can be connected in a tight fit manner to achieve a connection mode in which the collision rod 1 can be selectively detached according to a set orientation. The tight fit means that there is an interference fit relationship between the collision rod 1 and the connecting rod 2. For example, Figure 5In the embodiment, the connecting rod 2 is inserted into the slot on the collision rod 1, and the thickness of the connecting rod 2 is greater than the size of the slot on the collision rod 1, so that the collision rod 1 and the connecting rod 2 are in a state of interference fit, but under the action of a certain external force, the collision rod 1 and the connecting rod 2 can be separated; of course, a slot structure can also be formed at the end of the connecting rod 2, and the end of the collision rod 1 is inserted into the slot structure, so that the collision rod 1 and the connecting rod 2 are in a state of interference fit; or, it can also be other connection methods that can achieve a tight connection between the collision rod 1 and the connecting rod 2 while being separated under the action of external force.

[0051] It should be noted that the orientation-selective detachable connection structure formed between the collision rod 1 and the connecting rod 2 is not limited to the above-mentioned tight-fitting connection method, and other methods can also be used; for example, one end of the collision rod 1 is tightly matched with a connecting rod 2, and the other end of the collision rod 1 is hinged with another connecting rod 2. In this way, when the collision rod 1 rotates to the extreme position, the collision rod 1 is separated from the connecting rod 2 by the squeezing force of the operator, and pivots around the other end, thereby forming an infinite avoidance space. Alternatively, the end of the collision rod 1 forms a dovetail groove structure with a smaller angle, and the corresponding part of the connecting rod 2 also forms a dovetail structure, so that the end of the collision rod 1 can be snapped together with the connecting rod 2. Since the inclination angle of the inner side of the dovetail groove structure is small, before the collision rod 1 rotates to the extreme position, the collision rod 1 can be well connected with the connecting rod 2. When the collision rod 1 rotates to the extreme position, it can be separated and detached from the connecting rod 2 under the squeezing force of the operator.

[0052] Among them, "unlimited avoidance space" refers to the technical solution of the prior art that triggers an alarm or stops the operation of the equipment by moving or rotating the rigid rod as a whole. In this technical solution that triggers an alarm or stops the operation of the equipment by moving or rotating the rigid rod as a whole, the rotation angle of the rigid rod is limited, and the protection angle range for the operator is small. However, the collision rod 1 of the present invention can fall off at the extreme position and will not hinder the operator's forward movement. Therefore, it can be said that it gives the operator unlimited avoidance space. "Extreme position" refers to the maximum rotation angle position that the collision rod 1 can reach when rotating with the connecting rod 2.

[0053] Specifically, see Figure 1 As a more unique embodiment, the connecting rod 2 is hinged to the corresponding side of the control console surface 3 through the elastic damping element 5, that is, the connecting rod 2 is hinged to the handrails, guardrails and other positions on both sides of the control console surface 3 through the elastic damping element 5. Figure 2It is an embodiment in which the elastic damping element 5 adopts a spring hinge, one pivot piece of the spring hinge is connected to the handrail, guardrail and other positions on the side of the control console surface 3, the other pivot 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.

[0054] Furthermore, a fixing mechanism 6 can be installed on the handrails, guardrails, etc. on both sides of the control console 3, and the connecting rod 2 is connected to the fixing mechanism 6 through the elastic damping element 5. Figure 2 In the illustrated embodiment, the elastic damping element 5 is a spring hinge, one pivot piece of the spring hinge is connected to the fixing mechanism 6, the other pivot 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. By providing the elastic damping element 5, when the collision rod 1 is not squeezed, the collision rod 1 can be kept in the initial state, when the collision rod 1 is squeezed, the collision rod 1 can be moved in the direction away from the initial state, and when the external force is eliminated, the collision rod 1 can be reset to the initial state, thereby realizing the automatic reset function. The "initial state" refers to the state of the collision rod 1 when it is not subjected to the squeezing thrust of the operator.

[0055] Since the collision rod 1 is a movable part, the collision rod 1 usually shakes under the action of gravity or inertia of the equipment during movement. In order to prevent the collision rod 1 from being accidentally triggered, a pre-tightening force can be applied to the elastic damping element 5, such as applying a pre-tightening force to the spring hinge. The pre-tightening force of the spring prevents the collision rod 1 from being accidentally triggered.

[0056] It should be noted that the elastic damping element 5 is not limited to the structure of a spring hinge, but may also adopt other structures, such as a torsion spring or a gas spring. When the elastic damping element 5 adopts a torsion spring, the working principle of the torsion spring is similar to that of the spring hinge, which will not be repeated here; when the elastic damping element 5 adopts a gas spring, the gas spring can be arranged between the connecting rod 2 and the fixing mechanism 6. By putting the gas spring in a certain compression state, the gas spring has a certain pre-tightening force, thereby preventing the collision rod 1 from being accidentally triggered. When the collision rod 1 is squeezed, the gas spring is compressed accordingly. After the squeezing force is eliminated, the collision rod 1 returns to its initial position under the action of the elastic force of the gas spring.

[0057] In a specific embodiment, a limit block 7 is installed on the connecting rod 2, and the limit block 7 is located at the end where the connecting rod 2 is connected to the elastic damping element 5, that is, the limit block 7 is connected to the end of the connecting rod 2 opposite to the collision rod 1. The setting of the limit block 7 makes the height of the collision rod 1 in the vertical direction lower than the height of the hinge point between the connecting rod 2 and the control console surface 3 in the vertical direction, that is, the height of the collision rod 1 in the vertical direction is lower than the height of the pivot axis of the elastic damping element 5 in the vertical direction, so that the collision rod 1 can only move downward, which can effectively avoid the safety hazard of the collision rod 1 moving upward to squeeze the operator (especially above the neck). Of course, the limit block 7 is also connected to the elastic damping element 5, and the collision rod 1, the connecting rod 2 and the limit block 7 rotate together around the pivot center axis of the elastic damping element 5.

[0058] Further, see Figure 4 and Figure 5 , the upper surface of the limit block 7 can be an inclined plane, and correspondingly, a limit plate is installed at the upper end of the fixing mechanism 6, one end of the limit plate is fixedly connected to the elastic damping element 5, and the other end is used to limit the position of the limit block 7 to prevent the collision rod 1 from being pushed away from the initial position under the elastic force of the elastic damping element 5, and at the same time, it is also ensured that the height of the collision rod 1 in the vertical direction is lower than the height of the hinge point of the connecting rod 2 and the control console surface 3 in the vertical direction. Of course, the upper surface of the limit block 7 is not limited to the design of an inclined plane, and can also be a surface of other shapes, such as a convex curved surface, a wavy curved surface, etc., as long as it can ensure that the height of the collision rod 1 in the vertical direction is lower than the height of the hinge point of the connecting rod 2 and the control console surface 3 in the vertical direction.

[0059] In a specific embodiment, the position signal detection mechanism can adopt various forms, and it can adopt a single position signal detection element. For example, the position signal detection mechanism includes an operation signal detection device, and the operation signal detection device transmits a dangerous position signal when the collision rod 1 moves to a dangerous position, and the control unit 4 controls the mobile operating platform to brake or move in a safe direction, such as a typical reverse movement. As a preferred embodiment, the mobile operating platform anti-extrusion device of the present invention can adopt a secondary position signal detection, specifically, see Fig.10 and Fig.11The above-mentioned position signal detection mechanism may include a warning signal detection device and an operation signal detection device, wherein the warning signal detection device transmits a warning position signal when the collision rod 1 moves to the warning position, and the control unit 4 of the mobile operating platform controls the alarm to sound an alarm; when the operator touches the collision rod 1 by mistake, the setting of the warning signal detection device gives the operator a buffer distance, at which the mobile operating platform will not stop, and the warning signal detection device can remind the operator through the alarm; the operation signal detection device transmits a dangerous position signal when the collision rod 1 further moves to a dangerous position, and the control unit 4 controls the mobile operating platform to brake, triggering the mobile operating platform to stop, or the control unit 4 controls the mobile operating platform to move in a safe direction, such as typically in the reverse direction. The collision rod 1 rotates further to provide a larger safety protection distance for the operator.

[0060] This secondary signal detection form can, on the one hand, prevent misoperation to a certain extent. When the operator's body squeezes the collision rod 1 to pivot to the warning position, the control unit 4 controls the alarm to sound an alarm to remind the operator. The operator will promptly discover his own erroneous actions and correct the actions. On the other hand, it can further improve safety. If the operator is passively squeezed to tilt forward and downward, and the collision rod 1 reaches a dangerous position, the control unit 4 will control the mobile operating platform to brake to achieve deceleration. If necessary, it will even directly control the mobile operating platform to move in the opposite direction (previously, when reversing and hitting an obstacle, the mobile operating platform is controlled to move forward in the opposite direction) to avoid obstacles from behind, and the safety level is higher. In other words, the anti-extrusion device uses a secondary signal, the first level is a warning signal, and the second level is the operating signal for controlling the braking or reverse movement of the mobile operating platform. This allows the mobile operating platform control unit to have a hierarchical judgment on the control operation of the mobile operating platform, avoiding the normal operation of the mobile operating platform being affected by misoperation, and at the same time making the anti-extrusion device of the mobile operating platform safer.

[0061] See also Figure 4 , specifically, Figure 4 An embodiment of the warning signal detection device and / or the operation signal detection device using a travel switch as a sensor is shown. The travel switch is set on the fixing mechanism 6 so that the contact of the travel switch is located on the rotation track of the connecting rod 2. For example, the travel switch is set at the warning position. When the operator squeezes the collision rod 1 unconsciously or by mistake, the connecting rod 2 rotates to the warning position and touches the contact of the travel switch. The travel switch transmits the warning position signal. Figure 6, the control unit 4 controls the alarm to alert the operator, and the operator will find his or her erroneous action in time and correct the action; or, the travel switch is set in the dangerous position, when the operator is hit by the rear obstacle and squeezes the collision rod 1, the connecting rod 2 is rotated to the dangerous position and touches the contact of the travel switch, and the travel switch transmits the dangerous position signal, see Figure 6 , the control unit 4 controls the mobile operating platform to brake or move in a safe direction. Alternatively, the early warning signal detection device and the operation signal detection device can also be set at the same time, so that the early warning signal detection device and the operation signal detection device are arranged along the rotation trajectory of the connecting rod 2, such as when the early warning signal detection device is triggered, it is located at the initial position of the rotation range of the connecting rod 2 / collision rod 1, which plays a warning role, and when the operation signal detection device is triggered, it is located in the middle position of the rotation range of the connecting rod 2 / collision rod 1, which is used for safety control. After the connecting rod 2 touches the contact of the early warning signal detection device, it continues to rotate, and the connecting rod 2 touches the contact of the operation signal detection device again to realize secondary position signal detection. Among them, the early warning signal detection device and / or the operation signal detection device can be set only on the fixing mechanism 6 on one side, and further, the early warning signal detection device and / or the operation signal detection device can be set on the fixing mechanism 6 on both sides to prevent the early warning signal detection device and / or the operation signal detection device on one side from malfunctioning and failing.

[0062] It should be noted that the mobile operating platform belongs to a mobile working machine or a mobile device, and its control unit 4 is generally a conventional component in the mobile working machine or the mobile device. 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 operations based on the detection signal of the position signal detection mechanism. The control unit 4 performs early warning control according to logical judgment, or the valve output current is reduced, or directly cut off, or reverse current output, so as to control the mobile operating platform to decelerate, brake or move in a safe direction, such as reverse or deflection direction movement. Under the inspiration of the technical concept of the present invention, this is relatively mature in the realization of control technology. Specifically, the above-mentioned early warning signal detection device and operation signal detection device can be one of a photoelectric switch, a proximity switch, a travel switch, a Hall sensor, an ultrasonic sensor, and a laser sensor. The position detection transmission technology of the photoelectric switch, the proximity switch, the travel switch, the Hall sensor, the ultrasonic sensor, the laser sensor, etc. is currently widely used and has various application forms. Its line connection and application are relatively mature. In addition to the above-mentioned travel switch, no more examples of application forms are given.

[0063] On the basis of the technical solution of the anti-extrusion device of the present invention, the present invention further provides an aerial work machine, which includes the anti-extrusion device described in any of the above technical solutions.

[0064] The above describes the basic implementation manner and various preferred implementation manners of the anti-extrusion device of the present invention in a hierarchical manner. In order to facilitate a deeper understanding of the technical concept and advantages of the anti-extrusion device of the present invention, the structural form of the anti-extrusion device with relatively comprehensive relatively preferred features of the present invention is described below.

[0065] See also Figures 1 to 5 The anti-extrusion device shown in the figure adopts a collision rod 1, and the two ends of the collision rod 1 are respectively tightly connected with a connecting rod 2, and the connecting rod 2 is connected to a fixing mechanism 6 through an elastic damping element 5. The fixing mechanism 6 is arranged on both sides of the control console surface 3, specifically, connected to the guardrails or handrails on both sides of the control console surface 3. A space is formed in the fixing mechanism 6 for accommodating the elastic damping element 5. A limit block 7 is also installed at the end of the connecting rod 2. The limit block 7 and the collision rod 1 are respectively located at the two ends of the connecting rod 2. An early warning signal detection device and an operation signal detection device are also arranged in the fixing mechanism 6. The early warning signal detection device and the operation signal detection device are arranged at the rotation of the connecting rod 2. On the moving trajectory, the rotation angle of the connecting rod 2 can be detected; for example, when the early warning signal detection device is triggered, the connecting rod 2 / collision rod 1 is in the initial position of the rotation range, which plays a warning role. When the operation signal detection device is triggered, the connecting rod 2 / collision rod 1 is in the middle position of the rotation range, which is used for safety control; the control unit 4 can perform control operations based on the moving position signal sent by the early warning signal detection device or the operation signal detection device, such as the control unit 4 performs early warning control according to logical judgment, or reduces the valve output current, or directly cuts off, or outputs reverse current to control the mobile operating platform to slow down, brake or move in a safe direction.

[0066] See also Figures 7 to 9In the application process, the operator presses the collision rod 1, and the collision rod 1 and the connecting rod 2 rotate around the pivot center axis of the elastic damping element 5. When the collision rod 1 and the connecting rod 2 rotate to the corresponding angle, the early warning signal detection device is triggered, and the early warning signal detection device sends a warning position signal to the control unit 4. The control unit 4 controls the alarm to sound an alarm. If it is an operator's misoperation at this time, the alarm will remind the operator, and the operator will find his own erroneous action in time and correct the action; if the operator on the mobile operating platform is hit by an obstacle behind, the collision rod 1 and the connecting rod 2 are rotated to the corresponding angle. The operation signal detection device is triggered, and the operation signal detection device sends a dangerous position signal to the control unit 4, and the control unit 4 controls the mobile operating platform to brake or move in a safe direction, such as reverse movement. If the operator continues to be squeezed due to inertia, system failure or special circumstances, the operator will apply greater squeezing to the collision rod 1, so that the collision rod 1 and the connecting rod 2 are separated and fall off, thereby giving the operator a larger avoidance space, that is, unlimited avoidance space, to avoid damage to the operator. Of course, the tight-fit connection between the collision rod 1 and the connecting rod 2 can be designed so that when the force is within a certain range, the collision rod 1 and the connecting rod 2 do not separate. At this time, the collision rod 1 and the connecting rod 2 have not rotated to the extreme position; when the collision rod 1 and the connecting rod 2 are rotated to the extreme position, the force on the collision rod exceeds the threshold, and the collision rod 1 and the connecting rod 2 separate to form an infinite avoidance space; to a certain extent, the automatic reset function can be maintained.

[0067] It can be seen from the above description of the present invention that the present invention forms a design that converts a rigid connection into an infinite avoidance space by designing a tight fit connection between the collision rod 1 and the connecting rod 2 and utilizing the rotational orientation of the collision rod 1. This not only takes into account the advantages of stable detection of the existing technical solutions of the anti-extrusion device that triggers an alarm or stops the operation of the equipment by moving or rotating the rigid rod as a whole, but also provides infinite avoidance space at the extreme position, making up for the shortcomings of the existing technical solutions of the anti-extrusion device that triggers an alarm or stops the operation of the equipment by moving or rotating the rigid rod as a whole. At the same time, the height of the collision rod 1 in the vertical direction is designed to be lower than the hinge position to provide a larger safety protection distance. Among them, the upward movement of the collision rod 1 is limited by the limit block 7, so that the collision rod 1 is lower than the hinge position in the vertical direction, so that it can only move downward, avoiding the safety hazard of squeezing the operator (especially above the neck) when the collision rod 1 moves upward.

[0068] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. An anti-extrusion device, characterized in that: include: The movable mechanism comprises a collision rod (1) and a connecting rod (2), wherein the two ends of the collision rod (1) are respectively hinged to the two sides of a control console surface (3) via one of the connecting rods (2), so that the collision rod (1) can move and pivot from an initial state toward a direction away from the operator in response to the squeezing thrust exerted by the operator; the vertical height of the collision rod (1) is lower than the vertical height of the hinge point of the connecting rod (2) and the control console surface (3), so that the collision rod (1) can pivot downward in response to the squeezing thrust exerted by the operator; a position signal detection mechanism, which is installed to detect and transmit a moving position signal of the collision rod (1) so that the control unit (4) can perform a control operation based on the moving position signal; A limit block (7) is installed at one end of the connecting rod (2) opposite to the collision rod (1); The two ends of the collision rod (1) respectively form a directional selectable detachable connection structure with one of the connecting rods (2), so that the collision rod (1) can be disengaged from the connecting rod (2) at an extreme position in response to the squeezing thrust of an operator, thereby forming an infinite avoidance space.

2. The anti-extrusion device according to claim 1, characterized in that: The connecting rod (2) is hinged to the corresponding side of the control console surface (3) via an elastic damping element (5), and the elastic damping element (5) is configured to have an elastic force that enables the collision rod (1) to maintain the initial state or reset toward the initial state.

3. The anti-extrusion device according to claim 2, characterized in that: Fixing mechanisms (6) are respectively installed on both sides of the control console surface (3), and the connecting rod (2) is hingedly connected to the fixing mechanism (6) via the elastic damping element (5).

4. The 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 claim 1, characterized in that: The upper surface of the limiting block (7) is an inclined surface.

6. The anti-extrusion device according to claim 1, characterized in that: Both ends of the collision rod (1) are respectively tightly connected to one of the connecting rods (2).

7. The anti-extrusion device according to any one of claims 1 to 4, characterized in that: The position signal detection mechanism comprises an operation signal detection device, which transmits a dangerous position signal when the collision rod (1) moves to a dangerous position, and the control unit (4) controls the mobile operating platform to brake or move in a safe direction.

8. The anti-extrusion device according to claim 7, characterized in that: The position signal detection mechanism also includes a warning signal detection device, which transmits a warning position signal when the collision rod (1) moves to the warning position, and the control unit (4) controls the alarm to sound an alarm.

9. The anti-extrusion device according to claim 8, characterized in that: The operation signal detection device and the warning signal detection device are installed on at least one of the two sides of the control console surface (3).

10. A high-altitude working machine, characterized in that: The invention comprises an anti-extrusion device according to any one of claims 1 to 9.

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