CN111009428B - Contact switch, anti-extrusion device for mobile operation platform and aerial work machine - Google Patents
Contact switch, anti-extrusion device for mobile operation platform and aerial work machine Download PDFInfo
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- CN111009428B CN111009428B CN201911301470.0A CN201911301470A CN111009428B CN 111009428 B CN111009428 B CN 111009428B CN 201911301470 A CN201911301470 A CN 201911301470A CN 111009428 B CN111009428 B CN 111009428B
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/10—Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/44—Contacts characterised by the manner in which co-operating contacts engage by sliding with resilient mounting
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Push-Button Switches (AREA)
Abstract
The invention relates to a switch, and particularly discloses a contact switch which comprises a first conductive part (1), a second conductive part (2), an elastic element and a sliding rail (3), wherein two ends of the elastic element are respectively abutted against the sliding rail (3) and the first conductive part (1), the second conductive part (2) is installed on the side wall of the sliding rail (3), the first conductive part (1) can move along the length direction of the sliding rail (3), and when the first conductive part (1) moves to be in contact with the second conductive part (2), the contact switch is in a closed state. In addition, the invention also discloses an anti-extrusion device of the mobile operation platform and an aerial work machine. The contact switch has simple structure and high reliability.
Description
Technical Field
The present invention relates to a switch, and particularly, to a contact switch. In addition, the invention also relates to an anti-extrusion device for the movable operating platform and an aerial work machine.
Background
Safety of mobile consoles, typically for example, work platforms of aerial work machines, consoles or driving operation dashboard areas of ground mobile work vehicles, console areas of mobile work equipment inside buildings, etc., is of great importance.
In the operation or construction process, due to the complex operation environment, the equipment or the vehicle does not notice a large-size obstacle behind the equipment or cannot cause huge extrusion injury or even casualty accidents to operators in the mobile operation platform when the equipment or the vehicle moves backwards or backs a car or an accidental falling object impacts behind the equipment or the vehicle.
In order to prevent injuries to the operator in the event of the above-mentioned accidents or malfunctions, the mobile stations of the prior art are mostly provided with means for preventing jamming. The sensing circuit system of the anti-extrusion device is an important component of the anti-extrusion device, and the common sensing circuit system adopts the following steps: 1. the magnetic adsorption type circuit breaker is used for breaking a circuit when an operator is extruded and injured; 2. the pressing switch sends a signal when the pressure reaches a set value; 3. the infrared laser sensor sends out signals when light is blocked; 4. press-contact switches triggered by squeezing.
However, the anti-extrusion devices in the prior art have certain defects, such as high failure rate and low stability of a magnetic adsorption type circuit breaker and an infrared laser sensor, and the operation amplitude of an operator is slightly large, so that the equipment is stopped, and the working efficiency is seriously reduced; the pressing switch and the pressing touch switch have high requirements on the stress direction, the switch cannot be triggered when an operator is extruded, and the anti-extrusion device is required to depend on a sensor, so that the reliability is low and the cost is high.
In view of the above, there is a need for a switch that does not require a sensor, is highly safe, and has good stability.
Disclosure of Invention
The object of the first aspect of the present invention is to provide a contact switch having a simple structure and high reliability.
The technical problem to be solved by the second aspect of the present invention is to provide an anti-squeezing device for a mobile console, which has good safety and high reliability.
The third aspect of the present invention is to provide an aerial work machine, in which the work platform can effectively prevent squeezing, has good safety and high stability, and can effectively prevent misoperation.
In order to achieve the above object, a first aspect of the present invention provides a contact switch, including a first conductive portion, a second conductive portion, an elastic element, and a sliding rail, where two ends of the elastic element respectively abut against the sliding rail and the first conductive portion, the second conductive portion is mounted on a side wall of the sliding rail, the first conductive portion is capable of moving along a length direction of the sliding rail, and when the first conductive portion moves to contact with the second conductive portion, the contact switch is in a closed state.
Preferably, two or more second conductive parts are provided along a longitudinal direction of the slide rail.
As a preferable structure form, the first conductive part includes a slider and a columnar electrode, and the slider can drive the columnar electrode to slide along the sliding rail, so that the contact switch is switched between an open state and a closed state.
Further preferably, the first conductive part further comprises an elastic element and a blocking part, an accommodating cavity is formed inside the slider, the columnar electrode, the elastic element and the blocking part are sequentially installed in the accommodating cavity of the slider, and the elastic element can provide elastic force so that the columnar electrode abuts against the second conductive part in the closed state.
Preferably, the second conductive part comprises an electrode mounting plate and a fixed electrode, and the fixed electrode is fixed in the mounting hole of the side wall of the slide rail through the electrode mounting plate.
As another preferable structural form, the second conductive part includes an electrode mounting box and a movable electrode, and the movable electrode is accommodated in the electrode mounting box and fixed in a mounting hole of a side wall of the slide rail through the electrode mounting box.
Further preferably, the second conductive part further includes an elastic element, one end of the elastic element abuts against the electrode mounting box, and the other end of the elastic element abuts against the movable electrode, and the elastic element can provide an elastic force so that the movable electrode abuts against the first conductive part in the closed state.
Preferably, the first conductive part comprises a ring electrode that rolls along the sliding rail to switch the contact switch between an open state and a closed state; or the first conductive part comprises rollers and annular electrodes arranged between the rollers, and the rollers and the annular electrodes roll along the sliding rails together to enable the contact switch to be switched between an open state and a closed state.
The invention provides an anti-extrusion device for a mobile operation platform, which comprises an operation platform surface, a protection component and a contact switch in any one of the technical schemes of the first aspect, wherein the contact switch is arranged on the left side and/or the right side of the operation platform surface, the protection component is connected with a first conductive part of the contact switch, the protection component can respond to extrusion thrust of an operator to drive the first conductive part of the contact switch to move towards the direction far away from the operator, and a control system of the mobile operation platform can control the mobile operation platform based on the contact condition of the first conductive part and a second conductive part of the contact switch.
Preferably, one end of the slide rail, which is close to the operating table top, is provided with a drop port, and when the protection member moves to the drop port, the protection member and the first conductive part drop off from the slide rail.
Optionally, handrails are arranged on the left side and the right side of the operation table, and the slide rails are horizontally mounted, vertically mounted or mounted on the handrails on one side at an angle with the horizontal plane.
Preferably, the protective member is provided with a recess to accommodate the arm of the operator.
The invention provides an aerial working machine in a third aspect, which comprises the anti-extrusion device for the mobile operation platform in any one of the technical schemes in the second aspect.
In the basic technical scheme of the invention, the contact switch comprises a first conductive part, a second conductive part, an elastic element and a slide rail, wherein one end of the elastic element is abutted against one end of the slide rail, the other end of the elastic element is abutted against the first conductive part, the second conductive part is arranged on the side wall of the slide rail, when the first conductive part is pushed by external force, the first conductive part can overcome the elastic force of the elastic element and move towards the second conductive part, and when the first conductive part is contacted with the second conductive part, the contact switch is closed. Under the structure form, the installation position of the second conductive part on the slide rail can be adjusted according to the requirements of users, the distance that the first conductive part can move on the slide rail under the state that the contact switch is kept disconnected can be correspondingly changed, and the applicability is higher. Compared with the traditional magnetic adsorption switch, the infrared laser sensor and the like, the contact switch can be immediately broken off once a magnetic field or light is detected to be blocked, and the fault tolerance rate is low.
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 showing the overall construction of an anti-jamming device according to an embodiment of the present invention, in which a protection member is in an initial position and a contact switch is in an off state;
FIG. 2 is one of the schematic structural views of a touch switch according to an embodiment of the present invention;
FIG. 3 is a second schematic diagram of a touch switch according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a touch switch according to another embodiment of the present invention;
FIG. 5 is a schematic view showing the overall structure of an anti-jamming device according to another embodiment of the present invention, wherein the protection member is in an initial position and the contact switch is in an open state;
FIG. 6 is one of schematic structural views of a touch switch according to yet another embodiment of the present invention;
FIG. 7 is a second schematic structural view of a touch switch according to yet another embodiment of the present invention;
fig. 8 is a schematic view showing the overall construction of an anti-jamming device according to still another embodiment of the present invention, wherein the protection member is in the initial position and the contact switch is in the off state;
fig. 9 is a schematic structural view of a protective member according to an embodiment of the present invention.
Description of reference numerals:
1 first conductive part 11a slider
12a cylindrical electrode 13a blocking member
2 second conductive part 21a electrode mounting plate
22a fixed electrode 21b electrode mounting box
22b movable electrode
3 sliding rail 31 drop port
32 cover plate
4 operating table 5 mounting bracket
6 handrail 7 protection component
8 bearing
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.
It should be noted that the mobile operation platform of the present invention refers to a position or area of various machines or devices for controlling, driving and operating by an operator, including but not limited to an operation platform of an aerial work machine, a center console of a concrete device, and a driving operation area of a forklift used in a factory or other places.
The basic embodiment of the present invention provides a contact switch, which includes a first conductive part 1, a second conductive part 2, an elastic element and a sliding rail 3, and the contact switch shown in fig. 2 and 3 is in an off state, wherein the first conductive part 1 is located at an initial position, in the initial position, one end of the elastic element abuts against one end of the sliding rail 3, the other end of the elastic element abuts against the first conductive part 1, the first conductive part 1 abuts against one end of the sliding rail 3 tightly under the elastic force of the elastic element, and the second conductive part 2 is installed on the side wall of the sliding rail 3. Compared with the traditional magnetic adsorption switch, the infrared laser sensor and the like, the contact switch can be immediately broken off once a magnetic field or light is blocked, the fault tolerance rate is low, the contact switch can prevent a user from being troubled, when the first conductive part 1 of the contact switch moves in a set range under the pushing of external force, the contact switch cannot be closed, the fault tolerance rate is high, the elastic element enables an operator to be in error touch, the first conductive part 1 cannot easily move due to the resistance of elastic force, the operator can overcome the elastic resistance of the elastic element to move only by applying certain pressure, the unintended misoperation of the operator can be effectively prevented, and the elastic element can prevent the first conductive part 1 from being in error contact with the second conductive part 2 when the contact switch is applied to a scene with large shaking, meanwhile, the safety of the contact switch can be ensured, once the movement position of the first conductive part 1 exceeds a set range, namely the first conductive part 1 moves to be in contact with the second conductive part 2, the contact switch can be closed immediately, and after the external force is removed, the first conductive part 1 can return to the initial position under the action of the elastic force of the elastic element without manual reset. When the contact switch is in an open state, the set range within which the first conductive part 1 can move is the range from the initial position to the critical closed position. In this configuration, the installation position of the second conductive part 2 on the sliding rail 3 can be adjusted according to the operator's requirement, and accordingly, the setting range of the first conductive part 1 capable of moving on the sliding rail 3 in the state of keeping the contact switch disconnected can be changed, and the applicability of the contact switch is higher. It is understood that the elastic element mentioned in the present invention may be a spring, a tension spring, rubber, or the like capable of providing an elastic force.
Preferably, the contact switch may be provided with two or more second conductive parts 2 along the longitudinal direction of the slide rail 3. Referring to fig. 4 and 6, two second conductive parts 2 are mounted on the sliding rail 3, and are sequentially arranged at a first position and a second position of the sliding rail 3 from one end of the sliding rail 3 close to the initial position of the first conductive part 1 to the other end of the sliding rail 3, the first conductive part 2 moves along the length direction of the sliding rail 3 under the pushing of an external force, when the first conductive part 1 first contacts with the second conductive part 2 at the first position, at this point, the contact switch is closed, and a first signal can be transmitted to the outside, and if the first conductive part 1 continues to move, the first conductive part 1 is separated from the second conductive part 2 at the first position, the contact switch is opened, the first conductive part 1 continues to move into contact with the second conductive part 2 at the second position, the contact switch closes and transmits a second signal to the outside, and so on, the contact switch of the present invention enables hierarchical signal transmission.
As a preferred structure, the first conductive part 1 may include a slider 11a and a cylindrical electrode 12a, the slider 11a can drive the cylindrical electrode 12a to slide along the sliding rail 3, so as to switch the contact switch between the open state and the closed state, the cylindrical electrode 12a is wrapped in the slider 11a, and one end of the cylindrical electrode 12a is exposed out of the slider 11a to contact the second conductive part 2.
More preferably, referring to fig. 2 to 4, the first conductive part 1 further includes an elastic element and a blocking member 13a, the slider 11a is internally formed with an accommodating cavity, the cylindrical electrode 12a, the elastic element and the blocking member 13a are sequentially installed in the accommodating cavity of the slider 11a, and the elastic element can provide an elastic force to enable the cylindrical electrode 12a to abut against the second conductive part 2 in the closed state. The columnar electrode 12a may be a stepped shaft structure, the blocking member 13a may be a screw plug or a bolt, the columnar electrode 12a and the elastic element are sequentially installed in the slider 11a, and finally the screw plug is screwed, so that the first conductive part 1 is stably installed in the slider 11a, when the first conductive part 1 moves to contact with the second conductive part 2, because the columnar electrode 12a is under the action of the elastic force of the elastic element, the columnar electrode 12a can tightly abut against the second conductive part 2, and after the columnar electrode 12a is worn, under the action of the elastic force of the elastic element, the columnar electrode 12a of the stepped shaft structure can still contact with the second conductive part 2, thereby further ensuring the stability and the safety of the contact switch. The slide rail 3 of the present invention includes a main body with openings at both ends and two cover plates 32 for sealing, and the side wall of the main body is provided with a groove along the length direction so that the first conductive part 1 extends out of the slide rail 3 to connect with other components or bear external force. The slide rail 3 with the structure is simple in structure and convenient for installing the first conductive part 1, when the slide rail is installed, the elastic element and the first conductive part 1 are placed in the cavity of the slide rail main body, and then the openings at the two ends of the slide rail 3 are sealed through the cover plate 32.
Preferably, referring to fig. 2, the second conductive part 2 includes an electrode mounting plate 21a and a fixed electrode 22a made of an insulating material, the fixed electrode 22a is fixed on the electrode mounting plate 21a to form the second conductive part 2, and the second conductive part 2 is fixed on the side wall of the slide rail 3 by the electrode mounting plate 21a, so that the fixed electrode 22a is embedded in the mounting hole of the side wall of the slide rail 3, and the surface of the fixed electrode 22a is flush with the surface of the slide rail 3. When the fixed electrode 22a is damaged, the electrode mounting plate 21a can be easily removed to replace the fixed electrode 22a or the second conductive part 2 as a whole. When two second conductive parts 2 are provided on the slide rail 3, referring to fig. 2, two fixed electrodes 22a may be fixed to one electrode mounting plate 21a, or each fixed electrode 22a may be mounted to one electrode mounting plate 21 a.
As another preferable configuration, referring to fig. 6, the second conductive part 2 includes an electrode mounting box 21b and a movable electrode 22b, and the movable electrode 22b is accommodated in the electrode mounting box 21b and fixed in a mounting hole of a side wall of the slide rail 3 by the electrode mounting box 21 b. With this structure, the operator can easily attach or detach the second conductive part 2 to replace or repair the movable electrode 22 b.
Preferably, the second conductive part 2 further includes an elastic element having one end abutting against one end of the electrode mounting case 21b and the other end abutting against the movable electrode 22 b. Specifically, an elastic element is placed in a cylindrical electrode mounting box 21b, a movable electrode 22b with a stepped shaft structure is placed in the electrode mounting box 21b, an end cover of the electrode mounting box 21b is finally screwed to seal the elastic element and the movable electrode 22b in the electrode mounting box 21b, the end cover of the electrode mounting box 21b is provided with a small hole, one end, with a smaller diameter, of the movable electrode 22b can extend out of the end cover or be flush with the outer surface of the end cover, further preferably, one end, with a smaller diameter, of the movable electrode 22b can extend out of the end cover for a certain length, the outer peripheral surface of the end cover is provided with threads, a mounting hole in the side wall of the slide rail 3 is provided with a corresponding threaded hole, and the electrode mounting box 21b can be in threaded connection with the slide rail 3. After the electrode mounting box 21b is mounted on the sliding rail 3, preferably, the end with the smaller diameter of the movable electrode 22b can extend out of the end cover by a certain length, because the elastic element can provide elastic force, when the first conductive part 1 contacts with the movable electrode 22b, the movable electrode 22b can be pressed into or partially pressed into the electrode mounting box 21b, and when the first conductive part 1 moves to a position away from the closed position, the movable electrode 22b extends out of the electrode mounting box 21b again under the action of the elastic force, and in such a structure, even if the movable electrode 22b is worn, the movable electrode 22b can be ensured to be in close contact with the first conductive part 1, so that the safety and the stability of the contact switch are further enhanced.
Preferably, the first conductive part 1 comprises a ring electrode 12b, which ring electrode 12b rolls along the sliding track 3 to switch the contact switch between the open state and the closed state; or the first conductive part 1 may include rollers 11b and a ring electrode 12b disposed between the rollers 11b, and as shown in fig. 7, the ring electrode 12b is adhered or fixed between the two rollers 11b by screws, wherein the rollers 11b may be nylon wheels, and the ring electrode 12b may be made of a material with high conductivity, such as copper, so that the volume of the ring electrode 12b may be reduced and the material may be saved. In this configuration, the roller 11b and the ring electrode 12b roll together along the slide rail 3 to switch the contact switch between the open state and the closed state.
The contact switch can be applied to control circuits of various devices according to actual needs, and is particularly suitable for a sensing circuit of a push rod type anti-extrusion device because the contact switch is opened and closed through the movement of the first conductive part 1. Referring to fig. 1 and 3, the anti-squeezing device for a mobile operating platform of the present invention comprises an operating platform 4, a protection member 7 and a contact switch according to any one of the above technical solutions, wherein the contact switch is disposed on the left side and/or the right side of the operating platform 4, the protection member 7 is connected to a first conductive part 1 of the contact switch, when a cylindrical electrode 12a is used, the protection member 7 can be fixedly connected to a slider 11a through a bolt, when an annular electrode 12b is used, a bearing 8 is installed in the annular electrode 12b, and the protection member 7 is connected to an annular electrode 12b through a bearing 8. The contact switch may be disposed on one side of the operation table 4, and the other side of the operation table may be disposed with a common slide rail so that the protection member 7 can move along the slide rail, one end of the protection member 7 is connected with the contact switch, and the other end is connected with the slide rail 3. The protection component 7 can respond to the extrusion thrust of an operator to drive the first conductive part 1 of the contact switch to move towards the direction far away from the operator, and the control system of the mobile operation platform can control the mobile operation platform based on the contact condition of the first conductive part 1 and the second conductive part 2 of the contact switch, specifically, when the contact switch is provided with two second conductive parts 2, when the protection component 7 drives the first conductive part 1 to move to be closed with the second conductive part 2 at the first position, the control system of the mobile operation platform sends out an early warning signal, such as a warning lamp, to remind the operator of adjusting action, when the protection component 7 continues to move towards the direction far away from the operator to enable the contact switch at the second position to be closed, the control system controls the mobile operation platform to brake or move reversely, so as to provide safety protection for the operator, and the control unit of the mobile operation platform has hierarchical judgment on the control operation of the mobile operation platform, the normal operation of the mobile operation platform is prevented from being influenced by misoperation. When the protection member 7 drives the first conductive part 1 to move in the set position, the contact switch is not closed, so that a sufficient operation space is provided for an operator, the condition that the equipment is stopped due to the fact that the protection member 7 is pushed by the action of the operator is effectively prevented, and after the external force applied to the protection member 7 disappears, the first conductive part 1 is subjected to the elastic force of the elastic element to drive the protection member 7 to reset automatically. Moreover, the elastic element provides elastic force for the first conductive part 1, so that the first conductive part 1 and the second conductive part 2 can be effectively prevented from being in error contact due to unconscious error operation of an operator, and the error contact caused by shaking of the mobile operation table in the transportation process can be prevented.
Further preferably, referring to fig. 4, one end of the slide rail 3 close to the operation table top 4 is provided with a drop opening 31, when the protection member 7 moves to the drop opening 31, the protection member 7 and the first conductive part 1 drop off from the slide rail 3, and when an operator is squeezed, a larger space can be provided for the operator to ensure the safety of the operator.
Alternatively, the left and right sides of the operation table 4 are provided with handrails 6, and referring to fig. 1, 5 and 8, the slide rail 3 can be installed horizontally, vertically or at an angle to the horizontal on the handrail 6 on one side, which can be determined according to the actual installation situation. A mounting bracket 5 may be added to the armrest 6 for more stable support of the contact switch. In particular, the protection member 7 may take the form of a push rod provided with a recess to receive the arm of the operator, so that the operator can operate above the push rod in order to avoid the push rod being pressed down on the hand of the operator. In order to facilitate the operation above the push rod, the operating handle on the operating table 4 can be moved forward, and in addition, a groove as shown in reference to fig. 9 can be arranged on the push rod.
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 for the mobile operation platform.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. The device for preventing the moving operation table of the high-altitude operation machine from being extruded is characterized by comprising an operation table top (4), a protection component (7) and a contact switch, wherein the contact switch is arranged at the rear part of a left side handrail (6) and/or the rear part of a right side handrail (6) of the operation table top (4), the contact switch comprises a first conductive part (1), an elastic element, a sliding rail (3) and two second conductive parts (2) arranged along the length direction of the sliding rail (3), two ends of the elastic element are respectively abutted against the sliding rail (3) and the first conductive part (1), the second conductive parts (2) are arranged on the side wall of the sliding rail (3), the first conductive part (1) can move along the length direction of the sliding rail (3), and when the first conductive part (1) moves to be in contact with the second conductive parts (2), the contact switch is in a closed state;
the protection component (7) is arranged above the operation table board (4) and lower than the handrail (6), the protection component (7) is connected with the first conductive part (1), the protection component (7) can respond to the extrusion thrust of an operator to drive the first conductive part (1) of the contact switch to move towards the direction away from the operator, and a control system of the mobile operation table can control the mobile operation table based on the contact condition of the first conductive part (1) and the second conductive part (2), wherein when the protection component (7) drives the first conductive part (1) to move to close with the second conductive part (2) at the first position, the control system sends out an early warning signal; when the protection member (7) continues to move towards the direction far away from the operator so that the second conductive part (2) at the second position is closed, the control system controls the mobile operation platform to brake or move reversely, so that the control operation of the mobile operation platform forms a hierarchical judgment; and
one end, close to the operation table board (4), of the sliding rail (3) is provided with a dropping opening (31), and when the protection component (7) moves to the dropping opening (31), the protection component (7) and the first conductive part (1) fall off from the sliding rail (3).
2. The overhead working machine mobile console anti-jamming device according to claim 1, wherein the first conductive part (1) comprises a slider (11a) and a cylindrical electrode (12a), and the slider (11a) can drive the cylindrical electrode (12a) to slide along the slide rail (3) so as to switch the contact switch between an open state and a closed state.
3. The high-altitude operation machine mobile operation platform anti-extrusion device as claimed in claim 2, wherein the first conductive part (1) further comprises an elastic element and a blocking part (13a), an accommodating cavity is formed inside the slider (11a), and the cylindrical electrode (12a), the elastic element and the blocking part (13a) are sequentially installed in the accommodating cavity of the slider (11a), and the elastic element can provide elastic force to enable the cylindrical electrode (12a) to abut against the second conductive part (2) in the closed state.
4. The overhead working machine moving console anti-jamming device according to any one of claims 1 to 3, wherein the second conductive part (2) comprises an electrode mounting plate (21a) and a fixed electrode (22a), and the fixed electrode (22a) is fixed in a mounting hole of a side wall of the slide rail (3) through the electrode mounting plate (21 a).
5. The overhead working machine mobile console anti-jamming device according to claim 1, wherein the second conductive part (2) comprises an electrode mounting box (21b) and a movable electrode (22b), the movable electrode (22b) is accommodated in the electrode mounting box (21b) and fixed in a mounting hole of a side wall of the slide rail (3) through the electrode mounting box (21 b).
6. The aerial work machine mobile station anti-racking device according to claim 5, wherein said second conductive part (2) further comprises an elastic member having one end abutting against said electrode mounting box (21b) and the other end abutting against said movable electrode (22b), said elastic member being capable of providing an elastic force to abut said movable electrode (22b) against said first conductive part (1) in said closed state.
7. The aerial work machine mobile station anti-racking device according to claim 5 or 6, wherein said first conductive part (1) comprises a ring electrode (12b), said ring electrode (12b) rolling along said sliding track (3) to switch said contact switch between an open state and a closed state; or
The first conductive part (1) comprises rollers (11b) and annular electrodes (12b) arranged between the rollers (11b), and the rollers (11b) and the annular electrodes (12b) roll along the sliding rails (3) together to enable the contact switch to be switched between an open state and a closed state.
8. The device for preventing the moving operation platform of the high-altitude operation machine from being squeezed as claimed in claim 1, wherein the handrails (6) are arranged on the left side and the right side of the operation platform surface (4), and the slide rails (3) are horizontally installed, vertically installed or installed on the handrails (6) on one side at an angle with the horizontal plane.
9. The aerial work machine mobile station anti-racking device of claim 1 wherein said protective member (7) is provided with a recess to accommodate an operator's arm.
10. An aerial work machine comprising an aerial work machine mobile station anti-racking device according to any of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911301470.0A CN111009428B (en) | 2019-12-17 | 2019-12-17 | Contact switch, anti-extrusion device for mobile operation platform and aerial work machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911301470.0A CN111009428B (en) | 2019-12-17 | 2019-12-17 | Contact switch, anti-extrusion device for mobile operation platform and aerial work machine |
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| CN111009428A CN111009428A (en) | 2020-04-14 |
| CN111009428B true CN111009428B (en) | 2021-04-16 |
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| CN201911301470.0A Active CN111009428B (en) | 2019-12-17 | 2019-12-17 | Contact switch, anti-extrusion device for mobile operation platform and aerial work machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111795662B (en) * | 2020-06-22 | 2022-03-04 | 湖南中联重科智能高空作业机械有限公司 | Anti-extrusion device and aerial work machine |
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| CN111009428A (en) | 2020-04-14 |
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