Rotation detection mechanism of arm type aerial work platform

Abstract

The utility model discloses a slewing detection mechanism of arm type aerial work platform, including trigger plate, travel switch, frame platform, turntable, the trigger plate is fixed on the upper plane of frame platform, the travel switch passes through the turntable and extends downwards to contact the trigger plate, the travel switch can slide along the upper surface of trigger plate, and the travel switch is fixed on the upper plane of frame platform. The trigger plate protrudes upwards in the vertical direction and comprises a mounting part, a supporting part and a trigger part. The beneficial effects of the utility model are that: by raising the projection height of the trigger plate supporting part and additionally arranging the taper sleeve structure and the pit structure, sundries are not easy to accumulate on the platform surface of the trigger plate, the manufacturing cost is reduced, and the working efficiency and the safety are improved; original welding fixation of the trigger plate is changed into detachable connection, so that the trigger plate is convenient to disassemble and easy to clean; the central angle of the arc enclosed by the triggering part surface is measured to be 80-90 degrees, so that the rotation angle is ensured, and potential safety hazards caused by overlarge rotation angle are not easy to occur.

Description

Technical Field

[0001] The utility model relates to a boom vehicle rotation detection mechanism, in particular to a rotation detection mechanism of an arm-type aerial work platform, and belongs to the technical field of mechanical control engineering. Background Art

[0002] Boom-type aerial work platforms are common mechanical equipment in aerial engineering operations. The boom can be flexibly rotated by rotating the turntable, which can rotate 360°. However, during operation, when the boom rotates too much and the vehicle is moved at the same time, the boom is prone to imbalance and even overturning. There is also a risk of colliding with surrounding buildings. When the turntable rotates to 180°, the opposite of the normal operation will occur, which is likely to cause the operator to operate in the opposite direction, resulting in discomfort in operation and potential driving safety hazards.

[0003] In conventional boom products, the trigger plate used for the turntable rotation position detection switch is usually directly exposed and welded on the frame platform to become one with it. When the turntable rotates and the travel switch is transferred to the trigger plate, the travel switch signal is triggered and the signal is sent to the whole machine controller. The whole machine controller will make a safety judgment on the turntable rotation angle and the operation of the whole machine according to the pre-written program. The trigger plate adopts a welded exposed design. Although its process is simple, the structure is stable and the cost is low, this structure, because the trigger plate and the travel switch are exposed, will cause gravel, hardware gadgets, wooden boards and other work debris to get stuck between the two due to objective or human factors during actual operation. Therefore, if it is not checked in time during the rotation process, the travel switch will be damaged and unable to work, and it is not easy to repair and replace after damage.

[0004] Chinese patent CN107976158A discloses a rotation position detection device and method for aerial work vehicles, which mentions the use of a CCD sensor to detect images of different positions of a detection strip installed on the central rotating body to determine the specific rotation angle of the turntable. Although this method has high accuracy, it has a complex structure, is difficult to replace when damaged, and has high cost of use. Utility Model Content

[0005] Purpose of the invention: In order to solve the above-mentioned problems, the utility model provides a rotation detection mechanism for an arm-type aerial work platform. The device adjusts the installation method of the trigger plate in the prior art, raises the height of the trigger plate, and makes the trigger surface of the trigger plate and the travel switch away from the frame platform surface where debris is easily accumulated. It can effectively solve the problem of easy accumulation of work debris, thereby avoiding damage to the travel switch, reducing production costs, and improving reliability and work efficiency.

[0006] Technical solution: A rotation detection mechanism for an arm-type aerial work platform, including a trigger plate, a travel switch, a frame platform, and a turntable. The trigger plate is fixed to the upper plane of the frame platform, the travel switch passes through the turntable and extends downward to contact the trigger plate surface, the travel switch can slide along the upper surface of the trigger plate, the trigger plate protrudes upward in the vertical direction, and the trigger plate includes a mounting portion, a supporting portion, and a trigger portion.

[0007] The utility model adjusts the installation method of the trigger plate in the prior art, raises the height of the trigger plate, and makes the trigger surface of the trigger plate and the travel switch away from the frame platform surface where debris is easily accumulated. It can effectively solve the problem of easy accumulation of work debris, thereby avoiding damage to the travel switch, reducing production costs, and improving mechanism reliability and work efficiency.

[0008] Preferably, in order to prevent the trigger plate from being damaged by debris, both ends of the trigger portion are connected to the mounting portion through supporting portions, and the mounting portion and the frame platform are detachably assembled.

[0009] By using fasteners such as screws or bolts, the mounting portion and the frame platform surface are detachably connected, so that when the trigger plate is damaged and fails to work, it is convenient to promptly repair and replace individual components of the trigger plate, which not only reduces the production cost but also improves the maintenance efficiency.

[0010] Preferably, in order to make the turntable rotate with the rotating travel switch contacts, when rotating to the trigger part area, the movement trajectory of the travel switch contacts can fall within the trigger part area, the structure of the trigger part is an arc-shaped ring structure, the arc-shaped ring structure of the trigger part is coaxial with the rotation center, and the trigger part is symmetrically distributed left and right along the symmetry center plane of the whole vehicle.

[0011] By designing the structure of the trigger part as an arc-shaped ring structure, the width of the arc-shaped ring structure is reduced, the weight of the trigger plate is reduced, and space is saved; the arc-shaped ring structure of the trigger part is coaxial with the rotation center, so as to reduce the width of the trigger plate and reduce the rotation trajectory deviation caused by the loosening of the switch contacts due to natural fatigue damage of the turntable, and ensure that the travel switch contacts will not fall off the trajectory midway. The central symmetry of the trigger part can ensure that the rotation angles of the left and right are equal, thereby achieving the purpose of balance.

[0012] Preferably, in order to ensure the safety of driving operation and avoid the occurrence of safety hazards caused by excessive steering angle of the turntable, the central angle of the arc edge surrounded by the two ends of the trigger part is 80-90°.

[0013] By controlling the turning angle of the turntable to 80-90°, driving safety can be ensured and potential safety hazards caused by excessive turning angles of the turntable can be avoided.

[0014] Preferably, in order to ensure that the travel switch contacts run smoothly on the surface of the trigger portion, the plane of the trigger portion is parallel to the frame platform.

[0015] By making the trigger part parallel to the frame platform surface, the influence on the stability of the travel switch during operation due to the height difference of the trigger part can be avoided, ensuring that the travel switch contacts run smoothly in the trigger part area.

[0016] Preferably, in order to clean up the debris accumulated on the trigger portion platform, the trigger portion plane is tilted downward toward the forward direction of the vehicle.

[0017] By ensuring that the travel switch remains in a stable state when the travel switch contacts are in contact with the trigger part, the trigger part is tilted downward toward the front of the vehicle, and debris such as gravel naturally falls to the frame platform under the action of gravity, thereby achieving the cleaning purpose.

[0018] Preferably, in order to detect the rotation angle of the turntable in time, the bottom of the travel switch is a sliding contact, and the sliding contact sends a signal to the whole machine controller after contacting the trigger part.

[0019] By transmitting the signal of the contact between the travel switch contact and the trigger part to the whole machine controller, it can be quickly determined whether the rotation angle of the turntable exceeds the safe range, which is convenient for the whole machine controller to determine the turntable angle and the operating safety of the crane.

[0020] Preferably, in order to prevent debris on the surface of the trigger plate from contacting the sliding contact of the travel switch and causing damage to the travel switch, a cone sleeve structure is provided on the periphery of the travel switch, and the sliding contact is lower than the lower plane of the cone sleeve structure.

[0021] The cone sleeve structure is mounted on the periphery of the travel switch. Its unique structure of being larger at the bottom and smaller at the top cooperates with the trigger part to sweep away the debris accumulated on the surface of the trigger part when passing along the plate surface, thereby achieving the cleaning purpose and improving the safety of the travel switch.

[0022] Preferably, in order to prevent dropped long tools such as wrenches and screwdrivers or debris from being left on the frame platform and affecting the trigger surface again, a pit structure is provided on the bottom of the trigger plate corresponding to the frame platform surface.

[0023] By setting up the pit structure, the fallen debris can fall into the pit to avoid affecting the trigger surface.

[0024] Preferably, in order to control the cost of the trigger plate, and secondly to avoid the trigger plate support part being too high to cause structural instability; the support part being too low to cause the protrusion effect to be unclear, the protrusion height of the support part is 5-8cm.

[0025] By controlling the raised height of the support part to 5-8cm, the cost of the trigger plate can be controlled and the instability of the structure caused by the support part being too high can be avoided. If the support part is too low, the raised effect is not obvious. This is the optimal raised height range obtained through actual application and practice.

[0026] Beneficial effects: The utility model raises the raised height of the trigger plate support part, adds a cone sleeve structure, a pit structure, etc., so that it is not easy for debris to accumulate on the trigger plate platform surface, reducing production costs and improving work efficiency and safety; the trigger plate is changed from the original welding fixation to a detachable connection, which is easy to disassemble and clean; the central angle of the arc enclosed by the trigger surface is measured to be 80-90°, ensuring the size of the rotation angle, and it is not easy to cause safety hazards due to excessive rotation angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0029] Figure 2 It is a partial schematic diagram of the trigger plate and the detection switch of the utility model;

[0030] Figure 3 It is an axonometric diagram of the trigger plate structure of the utility model;

[0031] Figure 4 It is a side view of the trigger plate structure of the utility model when the trigger part of the plate surface is parallel;

[0032] Figure 5 This is a side view of the trigger plate structure of the utility model when the trigger plate surface is tilted downward in the forward direction of the vehicle;

[0033] Figure 6 It is a schematic diagram of the pit structure of the utility model. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] like Figure 1 As shown, it is a schematic diagram of the whole machine structure of the utility model. When the turntable 4 rotates and the travel switch 2 turns to the trigger plate 1, the travel switch signal is triggered and the signal is sent to the whole machine controller 6. The whole machine controller 6 will make a safety judgment on the rotation angle of the turntable 4 and the operation of the whole machine according to the pre-written program.

[0038] like Figure 2 As shown, a rotation detection mechanism of an arm-type aerial work platform includes a trigger plate 1, a travel switch 2, a frame platform 3, and a turntable 4. The trigger plate 1 is fixed to the upper plane of the frame platform 3, the travel switch 2 passes through the turntable 4 and extends downward to contact the trigger plate 1, and the travel switch 2 can slide along the upper surface of the trigger plate 1.

[0039] like Figure 3 , which is an isometric view of the trigger plate of the utility model, the trigger plate 1 protrudes upward in the vertical direction, and the trigger plate 1 includes a mounting portion 11, a supporting portion 12 and a trigger portion 13.

[0040] In order to prevent the trigger plate 1 from being damaged by debris, both ends of the trigger portion 13 are connected to the mounting portion 11 through the support portion 12 respectively, and the mounting portion 11 and the frame platform 3 are detachably assembled.

[0041] By using fasteners such as screws or bolts, the mounting portion 11 is detachably connected to the surface of the frame platform 3, so that when the trigger plate 1 is damaged and fails to work, it is convenient to promptly repair and replace individual components of the trigger plate 1, which not only reduces the production cost but also improves the work efficiency.

[0042] In order to make the turntable 4 rotate with the rotating travel switch sliding contact 5, when it rotates to the trigger part 13 area, the movement trajectory of the travel switch sliding contact 5 can fall within the trigger part 13 area. The structure of the trigger part 13 is an arc-shaped ring structure, and the arc-shaped ring structure of the trigger part 13 is coaxial with the rotation center. The trigger part 13 is symmetrically distributed left and right along the symmetry center plane of the whole vehicle.

[0043] By designing the structure of the trigger part 13 as an arc-shaped ring structure, the width of the trigger plate 1 is reduced; by making the arc-shaped ring structure of the trigger part 13 coaxial with the rotation center, the width of the trigger plate 1 can be reduced, and the rotation trajectory deviation caused by the loosening of the switch sliding contact 5 due to natural fatigue damage of the turntable 4 can be reduced, and it can also ensure that the travel switch sliding contact 5 will not fall off the trajectory midway. The central symmetry of the trigger part 13 can ensure that the rotation angles of the left and right are equal, thereby achieving the purpose of balance.

[0044] In order to ensure the safety of driving operation and avoid the occurrence of potential safety hazards caused by excessive steering angle of the turntable 4, the central angle of the arc surrounded by the two ends of the trigger part 13 is 80-90°.

[0045] By controlling the rotation angle of the turntable 4 to be between 80° and 90°, driving safety can be ensured and potential safety hazards caused by excessive steering angles of the turntable 4 can be avoided.

[0046] like Figure 4 As shown, it is a side view of the trigger plate structure of the utility model when the trigger part plate surface is parallel. In order to ensure that the travel switch sliding contact 5 runs smoothly on the surface of the trigger part 13, the plane of the trigger part 13 is parallel to the frame platform.

[0047] By making the trigger part 13 parallel to the frame platform 3 surface, the influence of the travel switch 2 on the travel switch 2 during operation due to the height difference of the trigger part 13 can be avoided, and the travel switch sliding contact 5 can be ensured to operate smoothly in the area of ​​the trigger part 13 . Example

[0048] like Figure 5 As shown, it is a side view of the trigger plate structure of the utility model when the trigger part plate surface is tilted downward in the forward direction of the whole vehicle. In order to clean up the debris accumulated on the platform of the trigger part 13, the plane of the trigger part 13 is tilted downward in the forward direction of the whole vehicle.

[0049] By tilting the trigger part 13 downward toward the front of the vehicle, gravity can be utilized to make it difficult for debris on the surface of the trigger part 13 to accumulate and fall downward, thereby achieving the purpose of cleaning.

[0050] In order to detect the rotation angle of the turntable 4 in time, the bottom of the travel switch 2 is a sliding contact, and the sliding contact 5 will send a signal to the whole machine controller 6 after contacting the trigger part 13.

[0051] By transmitting the signal of the surface contact between the travel switch sliding contact 5 and the trigger part 13 to the whole machine controller 6, it can be quickly determined whether the rotation angle of the turntable exceeds the safety range, which facilitates the whole machine controller 6 to make a determination on the angle of the turntable 4 and the operating safety of the driving. Example

[0052] In order to timely cooperate with the trigger part 13 to clean the accumulated debris on the surface, a cone sleeve structure 7 is sleeved on the periphery of the travel switch 2 , and the sliding contact 5 is lower than the lower plane of the cone sleeve structure 7 .

[0053] The cone sleeve structure 7, which is mounted on the periphery of the travel switch 2, has a unique structure of being larger at the bottom and smaller at the top, and cooperates with the trigger part 13 to sweep away the debris accumulated on the surface of the trigger part 13 when passing along the board surface, thereby achieving the purpose of cleaning. During the movement and cooperation process here, the board surface of the trigger part 13 does not contact the lower plane of the cone sleeve structure 7, and there is a gap.

[0054] like Figure 6 As shown, it is a schematic diagram of the pit structure of the utility model. In order to prevent long tools or debris such as wrenches and screwdrivers from falling and remaining on the frame platform 3, which will affect the trigger part 13 again, a pit structure 8 is provided on the surface of the frame platform 3 at the bottom of the trigger plate 1.

[0055] By setting up the pit structure 8, the fallen debris can fall into the pit to avoid affecting the surface of the trigger part 13.

[0056] In order to control the cost of the trigger plate, and secondly to avoid the trigger plate support part 12 being too high to cause structural instability; the support part 12 being too low to cause the protrusion effect to be unclear, the protrusion height of the support part 12 is 5-8 cm.

[0057] By controlling the raised height of the support portion 12 to 5-8 cm, the cost of the trigger plate 1 can be controlled, and the instability of the structure caused by the support portion 12 being too high can be avoided; if the support portion 12 is too low, the raised effect is not obvious. This is the optimal raised height range obtained through actual application and practice.

[0058] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0059] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A slewing detection mechanism for an arm-type aerial work platform, comprising a trigger plate (1), a travel switch (2), a frame platform (3), and a turntable (4), wherein the trigger plate (1) is fixed to an upper plane of the frame platform (3), the travel switch (2) penetrates the turntable (4) and extends downward to contact the trigger plate (1), and the travel switch (2) can slide along the upper surface of the trigger plate (1), characterized in that: The trigger plate (1) protrudes upwards in a vertical direction, and comprises a mounting portion (11), a supporting portion (12) and a trigger portion (13).

2. The rotation detection mechanism of the arm-type aerial work platform according to claim 1 is characterized in that: Both ends of the trigger portion (13) are connected to the mounting portion (11) via the support portion (12), respectively, and the mounting portion (11) and the vehicle frame platform (3) are detachably assembled.

3. The rotation detection mechanism of the arm-type aerial work platform according to claim 1 is characterized in that: The structure of the trigger part (13) is an arc-shaped ring structure, the arc-shaped ring structure of the trigger part (13) is coaxial with the rotation center, and the trigger part (13) is symmetrically distributed along the symmetric center plane of the whole vehicle.

4. The rotation detection mechanism of the arm-type aerial work platform according to claim 2 is characterized in that: The central angle of the arc edge surrounded by the two ends of the trigger part (13) is 80-90°.

5. The rotation detection mechanism of the arm-type aerial work platform according to claim 3 is characterized in that: The plane of the trigger portion (13) is parallel to the frame platform (3).

6. The rotation detection mechanism of the arm-type aerial work platform according to claim 3 is characterized in that: The plane of the trigger portion (13) is inclined downwardly toward the forward direction of the entire vehicle.

7. The rotation detection mechanism of the boom-type aerial work platform according to claim 1 is characterized in that: The bottom of the travel switch (2) is a sliding contact (5), and after the sliding contact (5) contacts the trigger portion (13), a signal is sent to the whole machine controller (6).

8. The rotation detection mechanism of the boom-type aerial work platform according to claim 7, characterized in that: A cone sleeve structure (7) is sleeved on the periphery of the travel switch (2), and the sliding contact (5) is lower than the lower plane of the cone sleeve structure (7).

9. The rotation detection mechanism of the boom-type aerial work platform according to claim 1, characterized in that: A concave pit structure (8) is provided on the bottom of the trigger plate (1) corresponding to the surface of the frame platform (3).

10. The rotation detection mechanism of the boom-type aerial work platform according to claim 1, characterized in that: The protruding height of the support portion (12) is 5-8 cm.

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