Aerial work platform boom telescoping to position detection device

Abstract

The utility model discloses a high altitude operation vehicle boom telescopic in -place detection device, including installing on the base and detection mouth of main arm and the first proximity sensor and second proximity sensor of installing on the base, install the first detection block of sub telescopic arm, second detection block, first proximity sensor and second proximity sensor are connected with ECU controller signal respectively, first detection block, second detection block interval setting and along vertical direction staggered setting along telescopic direction, when sub telescopic arm telescoping, first detection block, second detection block pass through detection mouth along telescopic direction in proper order, respectively trigger first proximity sensor, second proximity sensor, and the upper surface of first detection block, second detection block is provided with clearance in vertical direction in the inductive point of first proximity sensor, second proximity sensor. Advantageous effects: the utility model can systematically satisfy high altitude operation vehicle to boom in -place detection high reliability, long life, easy maintenance and strong environmental adaptability comprehensive requirement.

Description

Technical Field

[0001] This utility model relates to a detection device for the extension and retraction of the boom of an aerial work platform, belonging to the technical field of aerial work platforms. Background Technology

[0002] In the field of aerial work platforms and aerial work vehicles, accurate and reliable detection of the boom's extension or retraction to its full-extended or fully retracted limit position is a core element in ensuring safe and efficient operation. Currently, this function generally relies on traditional mechanically triggered limit switch technology. Its basic principle is to install a detection block on the boom; when the boom moves to its limit position, the detection block touches and triggers a mechanical limit switch installed in a fixed position, thereby generating a signal indicating that the boom has reached its limit. However, this widely used existing technology has revealed a series of inherent defects in practical engineering applications.

[0003] First, its mechanical contact structure has poor environmental tolerance. Dust, oil, and humid air commonly found at work sites can easily penetrate and adhere to the contact surface, leading to poor contact or signal jitter, resulting in unreliable detection signals and an increased false alarm rate. Second, due to its reliance on physical contact and impact, the switch contacts inevitably experience mechanical wear and fatigue under the long-term, high-frequency reciprocating motion of the boom, severely affecting the lifespan of the components and causing the equipment to face a high failure rate and frequent maintenance and replacement needs. Furthermore, this solution has stringent precision requirements during installation and commissioning, necessitating precise adjustment of the relative position between the limit switch and the detection block to ensure reliable triggering. This process is often cumbersome to assemble and difficult to debug, increasing the labor and time costs of production and maintenance. Summary of the Invention

[0004] Purpose of the invention: To solve the above-mentioned technical problems, this utility model provides a boom extension and retraction positioning detection device for aerial work platforms. The device uses a non-contact first proximity sensor and a second proximity sensor, in conjunction with a first detection block and a second detection block that are staggered on the sub-extension boom, to achieve high-precision, non-contact detection of the boom extension and retraction positioning state, avoiding direct collision and friction of mechanical contact points.

[0005] Technical Solution: A boom extension and retraction positioning detection device for an aerial work platform includes a base and a detection port mounted on the main boom, a first proximity sensor and a second proximity sensor mounted on the base, and a first detection block and a second detection block mounted on the sub-telescopic boom. The first and second proximity sensors are respectively connected to an ECU controller. The first and second detection blocks are spaced apart along the extension and retraction direction and staggered along the vertical direction. When the sub-telescopic boom extends or retracts, the first and second detection blocks pass through the detection port sequentially along the extension and retraction direction, triggering the first and second proximity sensors respectively. The sensing points of the first and second proximity sensors are provided with gaps in the vertical direction between themselves and the upper surfaces of the first and second detection blocks.

[0006] This invention employs non-contact first and second proximity sensors, along with first and second detection blocks staggered on the sub-telescopic boom, to achieve high-precision, non-contact detection of the boom's extended / retracted position, avoiding direct collisions and friction between mechanical contacts. By arranging the sensor sensing points and the upper surface of the detection blocks with a vertical gap, stable signal triggering and recognition are achieved. This solution fundamentally solves the problems of unreliable signals, high false alarm rates, and short lifespan caused by contact contamination and wear in traditional mechanical limit switches. It also significantly reduces the stringent requirements for installation accuracy and improves the environmental adaptability and overall reliability of the detection.

[0007] In a preferred embodiment, in order to accurately correspond to the actual travel distance of the sub-telescopic arm from its initial position to the target position, the straight-line distance between the first detection block and the second detection block is equal to the distance the sub-telescopic arm extends from its initial position to the designated target position.

[0008] By setting the straight-line distance between the first and second detection blocks to be equal to the travel distance, a strict match between the detection position and the mechanical movement travel is achieved, ensuring the accuracy and consistency of the arrival signal trigger point.

[0009] In a preferred embodiment, in order to minimize the weakening and damage to the main structure of the main arm while ensuring the detection function, the detection port includes a first through slot and a second through slot that extend along the telescopic direction of the sub-telescopic arm, respectively. The first through slot and the second through slot are staggered in the vertical direction. The first detection block passes through the first through slot along the telescopic direction, and the second detection block passes through the second through slot along the telescopic direction.

[0010] By setting a first through slot and a second through slot that extend along the telescopic direction and intersect vertically on the main arm, and configuring independent passage paths for the two detection blocks respectively, the optimized layout of the detection port is achieved, which can accommodate the passage of the detection blocks while maintaining the structural integrity of the main arm to the greatest extent.

[0011] In a preferred embodiment, to achieve modular installation and flexible maintenance of the sensors, and to ensure precise alignment of each sensor with its corresponding detection slot, the first proximity sensor and the second proximity sensor are detachably connected to the base via a first mounting plate and a second mounting plate, respectively. The sensing point of the first proximity sensor is located above the first slot, and the sensing point of the second sensor is located above the second slot. The first detection block triggers the first proximity sensor when it passes through the first slot in the telescopic direction, and the second detection block triggers the second proximity sensor when it passes through the second slot in the telescopic direction.

[0012] By detachably connecting the first and second proximity sensors to the base via independent first and second mounting plates, and precisely positioning the sensor sensing points above the corresponding through slots, independent installation and precise positioning of the sensors are achieved, facilitating installation, replacement, and debugging.

[0013] In a preferred embodiment, to facilitate sensor assembly and initially control its vertical installation height, both the first mounting plate and the second mounting plate are Z-shaped bent plates. The bottom end of the first mounting plate is detachably connected to the base, and its top end is detachably connected to the first proximity sensor. The bottom end of the second mounting plate is detachably connected to the base, and its top end is detachably connected to the second proximity sensor.

[0014] By using Z-shaped bent plates as the first and second mounting plates, which connect the base and the sensor respectively, the step characteristics of the Z-shaped structure are utilized to achieve the preliminary positioning and height adjustment of the sensor in the vertical direction, laying the foundation for subsequent fine adjustment.

[0015] In a preferred embodiment, to facilitate fine-tuning of the sensor's position in the vertical telescopic direction so that its sensing point can be precisely aligned with the optimal detection area above the first and second through slots, both the bottom ends of the first and second mounting plates are provided with oblong holes, and the first and second mounting plates are respectively connected to the base bolts through the oblong holes.

[0016] By setting oblong holes at the bottom of the first and second mounting plates and fixing them to the base with bolts, continuous and convenient position adjustment of the mounting plates and sensors within the length range of the oblong holes can be achieved.

[0017] In a preferred embodiment, in order to facilitate the assembly of the sensor and to precisely control the vertical gap between the sensor sensing point and the upper surface of the detection block, both the first proximity sensor and the second proximity sensor are threaded proximity switches, and their outer surfaces are fitted with adjusting nuts for adjusting the height. The first proximity sensor and the second proximity sensor are detachably connected to the Z-shaped bending plate through the adjusting nuts.

[0018] By using a threaded proximity switch with a built-in adjusting nut as the first and second proximity sensors, and connecting it to a Z-shaped bending plate, the vertical height of the sensor can be steplessly and precisely adjusted and reliably fixed by using the thread engagement and nut locking.

[0019] In a preferred embodiment, to prevent the sensor from being continuously triggered during boom extension and retraction due to improper design of the detection block length, thereby causing detection logic failure, the length of the first detection block is greater than the length of the first proximity sensor sensing point and less than the length of the first through slot, and the length of the second detection block is greater than the length of the second proximity sensor sensing point and less than the length of the second through slot.

[0020] By limiting the lengths of the first and second detection blocks to be greater than the length of the corresponding sensor sensing point and less than the length of the corresponding through slot, the detection blocks generate an effective trigger signal only when passing through the sensing point, ensuring the instantaneity and accuracy of the detection action.

[0021] In a preferred embodiment, to improve the durability of the detection device in complex outdoor environments, especially to prevent rainwater, dust, etc. from directly intruding into the sensor and electrical connection parts, a protective cover is also included. The protective cover is detachably connected to the base and covers the base.

[0022] By adding a detachable protective cover and enclosing it above the base, physical protection is achieved for the core detection components, enhancing the device's environmental adaptability and service life.

[0023] In a preferred embodiment, to facilitate the installation of the protective cover and achieve a more comprehensive and regular protective effect, the base is provided with a third through groove, the detection port is located in the third through groove, the first proximity sensor and the second proximity sensor are both located above the third through groove, and the protective cover is detachably connected to the outer edge of the base.

[0024] By setting a uniform third through slot on the base to accommodate the detection port and centrally arranging the sensors above the third through slot, while matching and connecting the protective cover with the outer contour of the base, the standardized installation of the protective cover and better sealing protection for the detection area are achieved.

[0025] Beneficial Effects: This utility model improves the anti-interference capability and accuracy of the detection signal by using a dual-path non-contact proximity sensor in conjunction with vertically staggered detection blocks, effectively avoiding false detections and failures caused by mechanical contact contamination and wear. The modular Z-shaped mounting plate, oblong holes, and integrated threaded adjustment sensor installation structure significantly improves the convenience of installation and debugging, enabling convenient and precise adjustment of the sensor's longitudinal position and vertical height, reducing the stringent dependence on assembly precision. Simultaneously, the optimized staggered slots and appropriately sized detection blocks ensure reliable triggering while effectively reducing weakening of the main boom structure and preventing signal logic errors. Furthermore, the addition of a detachable protective cover further enhances the device's environmental adaptability and protection level under harsh working conditions, systematically meeting the comprehensive requirements of aerial work platforms for high reliability, long lifespan, easy maintenance, and strong environmental adaptability in boom positioning detection. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the position of the second detection block of this utility model; Figure 3 This is an isometric view of the detection device of this utility model; Figure 4 This is a front view of the base of this utility model; Figure 5 This is a front view of the detection device of this utility model. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] like Figures 1-5 As shown, a boom extension and retraction positioning detection device for an aerial work platform includes a base 2 and a detection port 3 mounted on the main boom 1, a first proximity sensor 4 and a second proximity sensor 5 mounted on the base 2, and a first detection block 7 and a second detection block 8 mounted on the sub-telescopic boom 6. The first proximity sensor 4 and the second proximity sensor 5 are respectively connected to the ECU controller. The first detection block 7 and the second detection block 8 are spaced apart along the extension and retraction direction and staggered along the vertical direction. When the sub-telescopic boom 6 extends or retracts, the first detection block 7 and the second detection block 8 pass through the detection port 3 in sequence along the extension and retraction direction, triggering the first proximity sensor 4 and the second proximity sensor 5 respectively. The sensing points of the first proximity sensor 4 and the second proximity sensor 5 are provided with a gap in the vertical direction from the upper surfaces of the first detection block 7 and the second detection block 8.

[0032] By employing non-contact first proximity sensors 4 and 5, along with first detection blocks 7 and second detection blocks 8 staggered on the sub-telescopic boom 6, high-precision, non-contact detection of the boom's extended / retracted position is achieved, avoiding direct collisions and friction between mechanical contacts. Stable signal triggering and recognition are achieved by arranging the sensor sensing points and the upper surface of the detection blocks with a vertical gap. This solution fundamentally solves the problems of unreliable signals, high false detection rates, and short lifespans caused by contact contamination and wear in traditional mechanical limit switches. It also significantly reduces the stringent requirements for installation accuracy and improves the environmental adaptability and overall reliability of the detection.

[0033] In order to accurately correspond to the actual travel distance of the sub-telescopic arm 6 from its initial position to the target position, the straight-line distance between the first detection block 7 and the second detection block 8 is equal to the distance that the sub-telescopic arm 6 extends from its initial position to the designated target position.

[0034] By setting the straight-line distance between the first detection block 7 and the second detection block 8 to be equal to the travel distance, a strict match between the detection position and the mechanical movement travel is achieved, ensuring the accuracy and consistency of the position signal trigger point.

[0035] In order to minimize the weakening and damage to the main structure of the main arm 1 while ensuring the detection function, the detection port 3 includes a first through groove 31 and a second through groove 32 that extend along the telescopic direction of the sub-telescopic arm 6, respectively. The first through groove 31 and the second through groove 32 are staggered in the vertical direction. The first detection block 7 passes through the first through groove 31 along the telescopic direction, and the second detection block 8 passes through the second through groove 32 along the telescopic direction.

[0036] By setting a first through slot 31 and a second through slot 32 that extend along the telescopic direction and intersect vertically on the main arm 1, and configuring independent passage paths for the two detection blocks respectively, the optimized layout of the detection port 3 is achieved, which can accommodate the passage of the detection blocks while maintaining the structural integrity of the main arm 1 to the greatest extent.

[0037] To achieve modular installation and flexible maintenance of the sensors, and to ensure precise alignment of each sensor with its corresponding detection slot, the first proximity sensor 4 and the second proximity sensor 5 are detachably connected to the base 2 via the first mounting plate 41 and the second mounting plate 42, respectively. The sensing point of the first proximity sensor 4 is located above the first slot 31, and the sensing point of the second proximity sensor 5 is located above the second slot 32. The first detection block 7 triggers the first proximity sensor 4 by passing through the first slot 31 in the telescopic direction, and the second detection block 8 triggers the second proximity sensor 5 by passing through the second slot 32 in the telescopic direction.

[0038] By detachably connecting the first and second proximity sensors 5 to the base 2 via independent first and second mounting plates 42, and precisely positioning the sensor sensing points above the corresponding through slots, the sensors can be independently installed and precisely positioned, facilitating installation, replacement, and debugging.

[0039] To facilitate sensor assembly and initially control its vertical installation height, both the first mounting plate 41 and the second mounting plate 42 are Z-shaped bent plates. The bottom end of the first mounting plate 41 is detachably connected to the base 2, and its top end is detachably connected to the first proximity sensor 4. The bottom end of the second mounting plate 42 is detachably connected to the base 2, and its top end is detachably connected to the second proximity sensor 5.

[0040] By using Z-shaped bent plates as the first and second mounting plates 42, respectively connecting the base 2 and the sensor, the step characteristics of the Z-shaped structure are utilized to achieve the preliminary positioning and height adjustment of the sensor in the vertical direction, laying the foundation for subsequent fine adjustment.

[0041] To facilitate fine-tuning of the sensor's position in the longitudinal (vertical) telescopic direction, and to ensure that its sensing point is precisely aligned with the optimal detection area above the first through slot 31 and the second through slot 32, the bottom ends of the first mounting plate 41 and the second mounting plate 42 are provided with oblong holes 43. The first mounting plate 41 and the second mounting plate 42 are respectively bolted to the base 2 through the oblong holes 43.

[0042] By setting oblong holes 43 at the bottom of the first and second mounting plates 42 and fixing them to the base 2 with bolts, continuous and convenient position adjustment of the mounting plates and sensors within the length range of the oblong holes 43 can be achieved.

[0043] To facilitate sensor assembly and enable precise control of the vertical gap between the sensor sensing point and the upper surface of the detection block, both the first proximity sensor 4 and the second proximity sensor 5 are threaded proximity switches, and their outer surfaces are fitted with adjusting nuts 44 for adjusting height. The first proximity sensor 4 and the second proximity sensor 5 are detachably connected to the Z-shaped bending plate through the adjusting nuts 44.

[0044] By using a threaded proximity switch with a built-in adjusting nut 44 as the first and second proximity sensors 5, and connecting it to a Z-shaped bending plate, the vertical height of the sensor can be steplessly and precisely adjusted and reliably fixed by using the thread engagement and nut locking.

[0045] To prevent the sensor from being continuously triggered during boom extension and retraction due to improper design of the detection block length, thereby causing detection logic failure, the length of the first detection block 7 is greater than the length of the sensing point of the first proximity sensor 4 and less than the length of the first through slot 31, and the length of the second detection block 8 is greater than the length of the sensing point of the second proximity sensor 5 and less than the length of the second through slot 32.

[0046] By limiting the lengths of the first and second detection blocks 8 to be greater than the length of the corresponding sensor sensing point and less than the length of the corresponding through slot, the detection blocks generate an effective trigger signal only when passing through the sensing point, ensuring the instantaneity and accuracy of the detection action.

[0047] To improve the durability of the detection device in complex outdoor environments, especially to prevent rainwater, dust and other substances from directly intruding into the sensor and electrical connection parts, a protective cover 9 is also included. The protective cover 9 is detachably connected to the base 2 and covers the base 2.

[0048] By adding a detachable protective cover 9 and placing it over the base 2, physical protection is achieved for the core detection components, thereby enhancing the device's environmental adaptability and service life.

[0049] To facilitate the installation of the protective cover 9 and achieve a more comprehensive and regular protective effect, the base 2 is provided with a third through groove 21, the detection port 3 is located in the third through groove 21, the first proximity sensor 4 and the second proximity sensor 5 are both located above the third through groove 21, and the protective cover 9 is detachably connected to the outer edge of the base 2.

[0050] By setting a uniform third through groove 21 on the base 2 to accommodate the detection port 3, and concentrating the sensors above the third through groove 21, while matching and connecting the protective cover 9 with the outer contour of the base 2, the standardized installation of the protective cover 9 and the better sealing protection of the detection area are achieved.

[0051] like Figure 1 and Figure 2 As shown, in this embodiment, a signal transmission cable is also provided, with its two ends connected to the ECU controller and the first proximity sensor 4 / second proximity sensor 5 respectively, and the protective cover 9 covers the signal transmission cable. Figures 1-2 The connection between the signal transmission cable and the first proximity sensor 4 / second proximity sensor 5 has been omitted.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily 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 is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for detecting the extension and retraction position of an aerial work platform boom, characterized in that: The system includes a base (2) and a detection port (3) mounted on the main arm (1), a first proximity sensor (4) and a second proximity sensor (5) mounted on the base (2), and a first detection block (7) and a second detection block (8) mounted on the sub-telescopic arm (6). The first proximity sensor (4) and the second proximity sensor (5) are respectively connected to the ECU controller signal. The first detection block (7) and the second detection block (8) are spaced apart along the telescopic direction and staggered along the vertical direction. When the sub-telescopic arm (6) telescopically extends and retracts, the first detection block (7) and the second detection block (8) pass through the detection port (3) in sequence along the telescopic direction, triggering the first proximity sensor (4) and the second proximity sensor (5) respectively. The sensing points of the first proximity sensor (4) and the second proximity sensor (5) are provided with a gap in the vertical direction between them and the upper surfaces of the first detection block (7) and the second detection block (8).

2. The aerial work platform boom extension and retraction positioning detection device according to claim 1, characterized in that: The straight-line distance between the first detection block (7) and the second detection block (8) is equal to the distance from the initial position of the sub-telescopic arm (6) to the designated target position.

3. The aerial work platform boom extension and retraction detection device according to claim 2, characterized in that: The detection port (3) includes a first through groove (31) and a second through groove (32) extending along the telescopic direction of the sub-telescopic arm (6). The first through groove (31) and the second through groove (32) are staggered in the vertical direction. The first detection block (7) passes through the first through groove (31) along the telescopic direction, and the second detection block (8) passes through the second through groove (32) along the telescopic direction.

4. The aerial work platform boom extension and retraction positioning detection device according to claim 3, characterized in that: The first proximity sensor (4) and the second proximity sensor (5) are detachably connected to the base (2) via the first mounting plate (41) and the second mounting plate (42), respectively. The sensing point of the first proximity sensor (4) is set above the first through slot (31), and the sensing point of the second proximity sensor (5) is set above the second through slot (32). The first detection block (7) triggers the first proximity sensor (4) by passing through the first through slot (31) in the telescopic direction, and the second detection block (8) triggers the second proximity sensor (5) by passing through the second through slot (32) in the telescopic direction.

5. The aerial work platform boom extension and retraction positioning detection device according to claim 4, characterized in that: The first mounting plate (41) and the second mounting plate (42) are both Z-shaped bent plates. The bottom end of the first mounting plate (41) is detachably connected to the base (2), and its top end is detachably connected to the first proximity sensor (4). The bottom end of the second mounting plate (42) is detachably connected to the base (2), and its top end is detachably connected to the second proximity sensor (5).

6. The aerial work platform boom extension and retraction detection device according to claim 5, characterized in that: The bottom ends of the first mounting plate (41) and the second mounting plate (42) are provided with waist-shaped holes (43), and the first mounting plate (41) and the second mounting plate (42) are respectively bolted to the base (2) through the waist-shaped holes (43).

7. The aerial work platform boom extension and retraction positioning detection device according to claim 5, characterized in that: Both the first proximity sensor (4) and the second proximity sensor (5) are threaded proximity switches, and their outer surfaces are fitted with adjusting nuts (44) for adjusting height. The first proximity sensor (4) and the second proximity sensor (5) are detachably connected to the Z-shaped bending plate through the adjusting nuts (44).

8. The aerial work platform boom extension and retraction positioning detection device according to claim 3, characterized in that: The length of the first detection block (7) is greater than the length of the sensing point of the first proximity sensor (4) and less than the length of the first through slot (31). The length of the second detection block (8) is greater than the length of the sensing point of the second proximity sensor (5) and less than the length of the second through slot (32).

9. The aerial work platform boom extension and retraction positioning detection device according to claim 4, characterized in that: It also includes a protective cover (9), which is detachably connected to the base (2) and covers the base (2).

10. The aerial work platform boom extension and retraction positioning detection device according to claim 9, characterized in that: The base (2) is provided with a third through groove (21), the detection port (3) is located in the third through groove (21), the first proximity sensor (4) and the second proximity sensor (5) are both located above the third through groove (21), and the protective cover (9) is detachably connected to the outer edge of the base (2).

Images