Telescopic boom drag chain device, aerial work platform and aerial work platform control method

Abstract

This invention discloses a telescopic boom cable chain device, an aerial work platform, and an aerial work platform control method, comprising: a cable chain, one end of which is connected to the fixed boom of the telescopic boom; a cable chain guide, connected to the other end of the cable chain and used to connect to the boom of the telescopic boom, the cable chain guide being provided with a rack; a mounting base, used to connect to the fixed boom; a gear, rotatably mounted on the mounting base and meshing with the rack; and an angle detection element, mounted on the mounting base, used to detect the angular displacement of the gear. The cable chain guide and cable chain can move together with the boom, causing the rack to move together with the cable chain guide. Through the meshing transmission of the rack and gear, the gear is driven to rotate. During the rotation of the gear, the angular displacement of the gear can be detected using the angle detection element. Then, based on the angular displacement of the gear and the structural dimensions of the gear itself, the displacement of the rack can be calculated, which is also the telescopic displacement of the boom. Therefore, the extension position of the telescopic boom can be determined based on the displacement of the telescopic boom.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and more specifically, to a telescopic boom cable chain device. Furthermore, this invention also relates to an aerial work platform including the aforementioned telescopic boom cable chain device and a control method for the aerial work platform using the aforementioned device. Background Technology

[0002] Aerial work platforms are widely used in engineering construction.

[0003] Aerial work platforms include telescopic booms. The extension length of the telescopic boom has a significant impact on the allowable load range of the entire machine, as does the extension speed of the telescopic boom, which in turn has a significant impact on the safe operation of aerial work platforms. Therefore, real-time monitoring of the extension length of the telescopic boom is of great importance.

[0004] However, in related technologies, length sensors cannot be installed due to space limitations inside the telescopic arm.

[0005] Therefore, how to easily obtain the extension length of the telescopic boom of an aerial work platform is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a telescopic boom cable chain device that can conveniently obtain the extension length of the telescopic boom of an aerial work platform.

[0007] Another object of the present invention is to provide an aerial work platform including the above-mentioned telescopic boom cable chain device, which facilitates obtaining the extension length of the telescopic boom of the aerial work platform;

[0008] Another objective of this invention is to provide a control method for an aerial work platform applied to the above-mentioned aerial work platform, which can determine the allowable working load range corresponding to the extension length of the telescopic boom based on the extension length of the telescopic boom of the aerial work platform.

[0009] Another objective of this invention is to provide a control method for the aerial work platform applied to the above-mentioned aerial work platform, which can determine the extension speed of the telescopic boom based on the extension length of the telescopic boom of the aerial work platform, so as to ensure that the extension speed of the telescopic boom is within a safe range.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] A telescopic boom cable chain device, comprising:

[0012] Cable chain, one end of which is used to connect to the fixed boom of the telescopic boom;

[0013] A cable chain guide, connected to the other end of the cable chain and used for connection to the boom of the telescopic arm, the cable chain guide being provided with a rack;

[0014] Mounting base for connection to the fixed arm;

[0015] A gear is rotatably mounted on the mounting base and meshes with the rack;

[0016] An angle detection element is provided on the mounting base and is used to detect the angular displacement of the gear.

[0017] Optionally, it also includes:

[0018] An elastic member is provided on the mounting base for applying an elastic force to the gear so that the gear remains engaged with the rack.

[0019] Optionally, the angle detection component includes a rotating shaft and an angle sensor connected to the rotating shaft. The gear is connected to the rotating shaft. The rotating shaft is rotatably disposed on a floating component. The floating component is slidably disposed on the mounting base. The sliding direction of the floating component is the same as the extension and retraction direction of the elastic member. The elastic member is disposed between the floating component and the mounting base.

[0020] Optionally, it also includes:

[0021] A roller is rotatably mounted on the mounting base and abuts against the bottom of the cable chain conduit.

[0022] Optionally, it also includes:

[0023] A lateral limiting device is provided on the mounting base, located on both sides of the cable chain guide tube, for limiting the two sides of the cable chain guide tube.

[0024] Optionally, the lateral limiting device includes a spherical hinge bearing or a ball bearing, which is used to contact the side of the cable chain guide.

[0025] An aerial work platform, comprising:

[0026] A telescopic boom includes a fixed boom and a movable boom slidably connected to the fixed boom;

[0027] In any of the above-mentioned telescopic boom cable chain devices, one end of the cable chain of the telescopic boom cable chain device is connected to the fixed boom, the cable chain guide of the telescopic boom cable chain device is connected to the boom, and the mounting base of the telescopic boom cable chain device is connected to the fixed boom.

[0028] A control method for an aerial work platform, applied to the aforementioned aerial work platform, the control method comprising:

[0029] The angular displacement of the gears of the telescopic boom cable chain device of the aerial work platform is detected using an angle detection device.

[0030] The current position of the boom of the aerial work platform is calculated based on the angular displacement.

[0031] The allowable working load range of the aerial work platform is determined based on the current location.

[0032] Optionally, calculating the current position of the boom of the aerial work platform based on the angular displacement includes:

[0033] Every first preset time interval, the displacement of the boom within the first preset time interval is calculated based on the angular displacement of the gear within the first preset time interval, and the displacement of the boom within the i-th first preset time interval is denoted as k. i x i k i =1 represents the extension displacement, k i =-1 is the retraction displacement, and i is a positive integer;

[0034] Based on the cumulative displacement of the boom during the (i-1)th first preset time period and the displacement of the boom during the ith first preset time period, calculate the current total displacement x of the boom, x = ∑k i x i ;

[0035] At each of the first preset time intervals, the current position of the boom is determined based on the total displacement.

[0036] A control method for an aerial work platform, applied to the aforementioned aerial work platform, the control method comprising:

[0037] Every second preset time interval, the angular displacement of the gears of the telescopic boom cable chain device of the aerial work platform is detected by the angle detection device of the telescopic boom cable chain device within the second preset time interval.

[0038] Based on the angular displacement of the gear within the second preset time, calculate the extension and retraction speed of the boom of the aerial work platform within the second preset time.

[0039] Determine whether the extension / retraction speed exceeds a preset speed value;

[0040] If so, control the power device of the boom to decelerate the boom until the extension / retraction speed meets the preset speed value.

[0041] The telescopic boom cable chain device provided by this invention has the following beneficial effects:

[0042] This telescopic boom cable chain device is used to install on the telescopic boom of an aerial work platform. That is, one end of the cable chain is connected to the fixed boom of the telescopic boom, the cable chain guide is connected to the moving boom of the telescopic boom, and the gears and angle detection components are installed on the fixed boom of the telescopic boom through the mounting base.

[0043] The boom of the telescopic boom can extend and retract relative to the fixed boom. When the boom extends or retracts, it drives the cable chain guide and cable chain to move together, which in turn causes the rack to move along with the cable chain guide. Through the meshing transmission of the rack and gear, the gear is driven to rotate. During the rotation of the gear, the angular displacement of the gear can be detected by an angle detection device. Based on the angular displacement of the gear and the structural dimensions of the gear itself, the displacement of the rack, that is, the displacement of the cable chain guide and cable chain, and the extension and retraction displacement of the boom, can be calculated. Thus, the current position of the telescopic boom can be determined based on the displacement of the boom, which facilitates the determination of the allowable load range of the whole machine that corresponds to the extension position of the boom. It also facilitates the calculation of the extension speed of the boom based on the extension and retraction displacement of the boom, ensuring that the extension speed of the boom is within a safe range.

[0044] Moreover, by setting a rack in the cable chain guide, the meshing transmission between the gear and the rack is utilized, and the angular displacement of the gear is detected by the angle detection device. The angular displacement is converted into the displacement of the rack, which is also the displacement of the cable chain guide, the cable chain, and the telescopic boom. This structure is simple and does not require occupying the internal space of the telescopic boom, and can realize the measurement of the extension length of the telescopic boom.

[0045] It is important to emphasize that this invention proposes a method to add a gear and rack between the cable chain guide and the fixed boom of the telescopic boom. By utilizing the telescopic boom's extension and retraction relative to the fixed boom, the rack and gear are driven synchronously, achieving linkage between the gear and the telescopic boom. Furthermore, by detecting the angular displacement of the gear, the displacement of the telescopic boom's extension and retraction length can be indirectly determined. This invention enables real-time and precise monitoring of the telescopic boom's extension and retraction length, overcoming the deficiency in related technologies that cannot monitor the extension and retraction length of the boom, and solving the technical problem of the difficulty in obtaining the extension length of the telescopic boom of aerial work platforms in related technologies. Furthermore, this invention provides a specific arrangement scheme for the gear and rack. That is, the rack is set on the cable chain guide. Since the cable chain guide is connected to the boom of the telescopic boom, the cable chain guide can move together with the boom, thereby driving the rack to move synchronously with the boom through the cable chain guide. The gear and angle detection component are mounted on the fixed boom of the telescopic boom through the mounting base, avoiding the need to directly add detection-related structures between the boom and the fixed boom. This satisfies the installation requirements of boom displacement monitoring-related structures when space is limited between the boom and the fixed boom, and avoids affecting the movement of the boom.

[0046] The aerial work platform provided by the present invention includes any of the above-mentioned telescopic boom cable chain devices, and at least includes the beneficial effects of the above-mentioned telescopic boom cable chain devices.

[0047] One of the aerial work platform control methods provided by the present invention is applied to the above-mentioned aerial work platform, including the above-mentioned telescopic boom cable chain device, and can determine the allowable working load range corresponding to the extension length of the telescopic boom based on the boom extension length.

[0048] The present invention provides another aerial work platform control method, which is applied to the above-mentioned aerial work platform and includes the beneficial effects of the above-mentioned telescopic boom cable chain device. It can determine the telescopic boom extension speed according to the extension length of the telescopic boom of the aerial work platform to ensure that the telescopic boom extension speed is within a safe range. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0050] Figure 1 This is a cross-sectional schematic diagram of the telescopic arm cable chain device provided in a specific embodiment of the present invention;

[0051] Figure 2 Exploded view of the telescopic boom cable chain assembly (cable chain and cable chain conduit not shown).

[0052] Figure 3 This is a schematic diagram of the structure of a drag chain conduit;

[0053] Figure 4 This is a structural schematic diagram of a telescopic boom cable chain device.

[0054] Figure 5 This is a schematic diagram of the structure of the aerial work platform provided in a specific embodiment of the present invention;

[0055] Figure 6 A flowchart illustrating a control method for an aerial work platform provided in a specific embodiment of the present invention;

[0056] Figure 7 A flowchart of another aerial work platform control method provided in a specific embodiment of the present invention.

[0057] Figure label:

[0058] 1-Drag chain; 2-Drag chain guide; 3-Rack; 4-Mounting base; 5-Gear; 6-Angle detection component; 7-Elastic component; 8-Floating component; 9-Roller; 10-Lateral limiting device; 101-Spherical hinge bearing; 11-Sliding bearing; 12-Support shaft; 13-Fixed component; 14-Adapter component; 15-Mounting bracket;

[0059] 100-Telescopic arm cable chain device. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] The core of this invention is to provide a telescopic boom cable chain device that facilitates obtaining the extended length of the telescopic boom of an aerial work platform. Another core aspect of this invention is to provide an aerial work platform including the aforementioned telescopic boom cable chain device, which facilitates obtaining the extended length of the telescopic boom. A further core aspect is to provide an aerial work platform control method applied to the aforementioned aerial work platform, which can determine the allowable working load range corresponding to the extended length of the telescopic boom. Finally, a core aspect of this invention is to provide an aerial work platform control method applied to the aforementioned aerial work platform, which can determine the telescopic boom's extension speed based on the extended length of the telescopic boom, ensuring that the extension speed is within a safe range.

[0062] Please refer to Figure 1 , Figure 2 and Figure 3 and Figure 4 This invention provides a telescopic boom cable chain device, including a cable chain 1, a cable chain guide 2, a mounting base 4, a gear 5, and an angle detection component 6. One end of the cable chain 1 is used to connect to the fixed boom of the telescopic boom; the other end of the cable chain 1 is connected to the cable chain guide 2, which is used to connect to the movable boom of the telescopic boom, and the cable chain guide 2 is provided with a rack 3; the mounting base 4 is used to connect to the fixed boom of the telescopic boom, and the mounting base 4 serves to install and support the gear 5 and the angle detection component 6. The gear 5 is rotatably mounted on the mounting base 4, and the gear 5 meshes with the rack 3; the angle detection component 6 is mounted on the mounting base 4, and the angle detection component 6 is used to detect the angular displacement of the gear 5.

[0063] Understandably, during use, the telescopic boom cable chain device is installed on the telescopic boom of the aerial work platform. That is, one end of the cable chain 1 is connected to the fixed boom of the telescopic boom, the cable chain guide 2 is connected to the moving boom of the telescopic boom, and the gear 5 and the angle detection component 6 are installed on the fixed boom of the telescopic boom through the mounting base 4.

[0064] The boom of the telescopic boom can extend and retract relative to the fixed boom. When the boom extends or retracts, it drives the cable chain guide 2 and the cable chain 1 to move together, which in turn causes the rack 3 to move along with the cable chain guide 2. Through the meshing transmission of the rack 3 and the gear 5, the gear 5 is driven to rotate. During the rotation of the gear 5, the angular displacement of the gear 5 can be detected by the angle detection component 6. Based on the angular displacement of the gear 5 and the structural dimensions of the gear 5 itself, the displacement of the rack 3 can be calculated, which is also the displacement of the cable chain guide 2 and the cable chain 1, and thus the extension and retraction displacement of the boom. Based on the displacement of the boom, the current position of the boom can be determined, which facilitates the determination of the allowable load range of the whole machine that corresponds to the extension position of the boom. It also facilitates the calculation of the extension speed of the boom based on the extension and retraction displacement, so as to ensure that the extension speed of the boom is within a safe range.

[0065] Moreover, in this embodiment, by setting a rack 3 in the drag chain conduit 2, the meshing transmission between the gear 5 and the rack 3 is utilized, and the angular displacement of the gear 5 is detected by the angle detection component 6. The angular displacement is converted into the displacement of the rack 3, which is also the displacement of the drag chain conduit 2, the drag chain 1 and the telescopic boom. This structure is simple and does not require occupying the internal space of the telescopic boom, and can realize the measurement of the extension length of the telescopic boom.

[0066] It is important to emphasize that the embodiments of the present invention propose an inventive concept that involves adding a gear 5 and a rack 3 between the cable chain guide 2 and the fixed boom of the telescopic boom. By utilizing the telescopic movement of the boom relative to the fixed boom, the rack 3 and gear 5 are driven synchronously, achieving linkage between gear 5 and the telescopic boom. Furthermore, by detecting the angular displacement of gear 5, the displacement of the boom can be indirectly determined. This invention enables real-time and accurate monitoring of the telescopic boom's extension length, overcoming the deficiency in related technologies where the extension length of the boom cannot be monitored, and solving the technical problem of the difficulty in obtaining the extension length of the telescopic boom of aerial work platforms in related technologies. Furthermore, this embodiment provides a specific arrangement scheme for the gear 5 and rack 3. That is, the rack 3 is set on the cable chain guide 2. Since the cable chain guide 2 is connected to the boom of the telescopic boom, the cable chain guide 2 can move together with the boom, thereby driving the rack 3 to move synchronously with the boom through the cable chain guide 2. The gear 5 and the angle detection component 6 are set on the fixed boom of the telescopic boom through the mounting base 4, avoiding the need to directly add detection-related structures between the boom and the fixed boom. This satisfies the installation requirements of boom displacement monitoring-related structures when the space between the boom and the fixed boom is limited, and avoids affecting the movement of the boom.

[0067] Furthermore, such as Figure 1 and Figure 2 As shown, in some embodiments, the telescopic boom cable chain device further includes an elastic member 7, which is disposed on the mounting base 4. The elastic member 7 is used to apply an elastic force to the gear 5 so that the gear 5 remains engaged with the rack 3.

[0068] In other words, by setting the elastic member 7, the gear 5 can float, so that under the action of the elastic member 7, the gear 5 always has the elastic force to mesh with the rack 3, so that the gear 5 can always mesh with the rack 3, thereby ensuring the reliability and accuracy of the meshing transmission between the gear 5 and the rack 3, which is beneficial to ensuring the accuracy of the test results.

[0069] It should be noted that this embodiment does not limit the specific structure and specific arrangement of the elastic member 7, as long as the elastic member 7 can provide elastic force to the gear 5 so that the gear 5 remains in mesh with the rack 3.

[0070] like Figure 1 and Figure 2 As shown, in some embodiments, the angle detection element 6 includes a rotating shaft and an angle sensor connected to the rotating shaft. The gear 5 is connected to the rotating shaft. The rotating shaft is rotatably disposed on the floating element 8. The floating element 8 is slidably disposed on the mounting base 4. The sliding direction of the floating element 8 is the same as the extension and retraction direction of the elastic member 7. The elastic member 7 is disposed between the floating element 8 and the mounting base 4.

[0071] In other words, this embodiment utilizes an angle sensor to detect the rotation angle of the shaft, thereby detecting the angular displacement of gear 5. The angle sensor can be a rotary potentiometer or encoder, as long as it can detect the rotation angle of the shaft. The angle sensor can be directly fixed to the shaft via a coupling or flange, or it can indirectly detect the shaft angle via a transmission mechanism. Simultaneously, gear 5 is connected to the shaft, which supports gear 5. Furthermore, when gear 5 rotates, it drives the shaft to rotate, thus enabling the angle sensor to detect the shaft's rotation angle. The shaft is rotatably mounted on the floating member 8, which provides rotational support for the shaft and gear 5, allowing them to rotate relative to the floating member 8. Since the floating member 8 is slidably mounted on the mounting base 4, the entire shaft and gear 5 can float by sliding relative to the mounting base 4. Therefore, the elastic force applied to the floating member 8 by the elastic member 7 ensures that gear 5 is always engaged with rack 3, preventing gaps or jamming between gear 5 and rack 3.

[0072] It should be noted that the specific structure of the floating component 8 is not limited in this embodiment, as long as the floating component 8 can rotate to support the pivot and can slide relative to the mounting base 4.

[0073] For example, such as Figure 2 As shown, the floating component 8 includes a first U-shaped support arm and a sliding part. The first U-shaped support arm includes two first support plates arranged in parallel and a first base plate connected between the two first support plates. The rotating shaft is rotatably passed through the two first support plates. The gear 5 is installed on the rotating shaft and located between the two first support plates. The sliding part is connected to the first base plate and is slidably passed through the mounting base 4. The elastic member 7 can be a spring. The spring is sleeved on the sliding part and located between the mounting base 4 and the first base plate.

[0074] like Figure 1 and Figure 2 As shown, in order to ensure the reliability of the sliding of the floating member 8 relative to the mounting base 4, in some embodiments, a sliding bearing 11 is provided between the floating member 8 and the mounting base 4.

[0075] In other words, this embodiment uses a sliding bearing 11 between the floating component 8 and the mounting base 4 to ensure the smoothness of the sliding of the floating component 8 relative to the mounting base 4 and the correctness of the sliding direction. At the same time, it can reduce the friction between the floating component 8 and the mounting base 4, reduce the wear of the floating component 8, and ensure the accuracy of the position of the floating component 8, thereby improving the meshing accuracy of the gear 5 and the rack 3 and ensuring the reliability of the entire device.

[0076] It should be noted that this embodiment does not limit the specific structure and type of the sliding bearing 11.

[0077] Furthermore, since telescopic boom cable chain devices are typically cantilever beam structures, when the cable chain guide 2 extends significantly with the boom of the telescopic boom, the cable chain 1 often experiences substantial downward deflection due to gravity, easily causing the cable chain guide 2 to bend and break. To address this technical problem, such as... Figure 1 and Figure 2 As shown, in some embodiments, the telescopic boom cable chain device further includes a roller 9, which is rotatably mounted on the mounting base 4 and abuts against the bottom of the cable chain guide 2.

[0078] In other words, this embodiment provides a rotatable roller 9 at the bottom of the cable chain guide 2, which supports and limits the bottom of the cable chain guide 2, preventing the cable chain 1 from bending downwards under gravity when it extends too far, thus avoiding bending and breakage of the cable chain guide 2. In addition, when the cable chain guide 2 moves with the boom of the telescopic arm, rolling friction is generated between the cable chain guide 2 and the roller 9. The friction force is small, and it is not easy to cause wear to the cable chain guide 2.

[0079] It should be noted that this embodiment does not limit the specific arrangement of the roller 9, as long as the roller 9 can be rotatably mounted on the mounting base 4 and the roller 9 abuts against the bottom of the drag chain guide 2.

[0080] like Figure 1 and Figure 2 As shown, in some embodiments, the roller 9 is mounted on the mounting base 4 via a fixing member 13. For example, the fixing member 13 includes a second U-shaped support arm and a fixing part. The second U-shaped support arm includes two parallel second support plates and a second base plate connected between the two second support plates. A support shaft 12 passes through the two second support plates, and the roller 9 is mounted on the support shaft 12. The roller 9 can be rotated by rotating the roller 9 relative to the support shaft 12 or by rotating the support shaft 12 relative to the two second support plates. The fixing part is connected to the second base plate and fixedly connected to the mounting base 4, thereby enabling the fixing member 13 to be mounted on the mounting base 4, that is, enabling the roller 9 to be rotatably mounted on the mounting base 4.

[0081] In addition, to prevent the cable chain guide tube 2 from tilting laterally, such as Figure 1 and Figure 2 As shown, in some embodiments, the telescopic boom cable chain device further includes a lateral limiting device 10, which is disposed on the mounting base 4 and located on both sides of the cable chain guide 2. The lateral limiting device 10 is used to limit the two sides of the cable chain guide 2.

[0082] In other words, this embodiment uses a lateral limiting device 10 on the mounting base 4 to laterally limit the drag chain guide 2, preventing the drag chain guide 2 from tilting to the side. This is especially useful when the aerial work platform using this telescopic boom drag chain device is working on a side slope, preventing the drag chain guide 2 from tilting to the side and ensuring the reliability of the telescopic boom drag chain device.

[0083] It should be noted that the specific structure of the lateral limiting device 10 is not limited in this embodiment, as long as the lateral limiting device 10 can limit the lateral movement of the cable chain guide tube 2.

[0084] like Figure 1 As shown, in some embodiments, the lateral limiting device 10 includes a ball bearing 101 or a ball for contacting the side of the cable chain guide 2.

[0085] In other words, in this embodiment, the side of the cable chain guide 2 is provided with rolling support by ball joint bearing 101 or ball bearing, so that there is rolling friction between the cable chain guide 2 and the lateral limiting device 10. The friction force is small, which can avoid damage to the side of the cable chain guide 2.

[0086] In addition, the specific structure of the mounting base 4 is not limited in the above embodiments, as long as the mounting base 4 can support the gear 5, the angle detection element 6, the elastic member 7, the roller 9 and / or the lateral limiting device 10.

[0087] like Figure 2As shown, in some embodiments, the mounting base 4 includes a third U-shaped support arm and a mounting portion. The third U-shaped support arm includes two parallel third support plates and a third base plate connected between the two third support plates. A lateral limiting device 10 is disposed on the two third support plates. The floating member 8 and the fixing member 13 mentioned above are both disposed on the third base plate, so that the gear 5 and the roller 9 are both located in the space between the two third support plates, and at least a portion of the cable chain guide 2 is located between the two third support plates, so that the gear 5 and the roller 9 are both located at the bottom of the cable chain guide 2. The gear 5 meshes with the rack 3 at the bottom of the cable chain guide 2, and the roller 9 abuts against the bottom of the cable chain guide 2. The side of the cable chain guide 2 contacts the lateral limiting device 10. In addition, the mounting portion is connected to the third U-shaped support arm, for example, the mounting portion is connected to the outside of the connection between one of the third support plates and the third base plate. The mounting portion can be a bent structure, and the mounting portion is provided with mounting holes for connection with the fixed arm.

[0088] It should be noted that the above embodiments do not limit the specific connection method between the cable chain guide 2 and the boom. For example, as Figure 4 As shown, the end of the cable chain guide 2 furthest from the cable chain 1 is fixed to the mounting bracket 15 via an adapter 14. The mounting bracket 15 is used to connect to the boom of the telescopic boom. The adapter 14 can be a pressure plate.

[0089] like Figure 5 As shown, in addition to the telescopic boom cable chain device 100 described above, the present invention also provides an aerial work platform including the telescopic boom cable chain device 100 disclosed in the above embodiments. This aerial work platform further includes a telescopic boom, which includes a fixed boom and a movable boom that can extend and retract relative to the fixed boom. One end of the cable chain 1 of the telescopic boom cable chain device 100 is connected to the fixed boom, the cable chain guide 2 of the telescopic boom cable chain device 100 is connected to the movable boom, and the mounting base 4 of the telescopic boom cable chain device 100 is connected to the fixed boom. The structures of other parts of this aerial work platform are described in the prior art and will not be repeated here.

[0090] In other words, the focus of this embodiment is that the aerial work platform adopts the telescopic boom cable chain device 100 disclosed in any of the above embodiments, and applies the telescopic boom cable chain device 100 to the aerial work platform, so that the aerial work platform includes at least the above-mentioned telescopic boom cable chain device 100. The beneficial effects will not be repeated here.

[0091] like Figure 6 As shown, in addition to the aforementioned telescopic boom cable carrier device and aerial work platform, the present invention also provides an aerial work platform control method. This aerial work platform control method is applied to the aforementioned aerial work platform and includes steps S11-S13:

[0092] S11: Use the angle detection component 6 of the telescopic boom cable chain device of the aerial work platform to detect the angular displacement of the gear 5 of the telescopic boom cable chain device.

[0093] S12: Calculate the current position of the boom of the aerial work platform based on the angular displacement of gear 5;

[0094] S13: Determine the allowable working load range of the aerial work platform based on the current position of the boom.

[0095] In other words, this embodiment uses the angle detection component 6 to detect the angular displacement of the gear 5 in real time. Based on the transmission ratio between the gear 5 and the rack 3, the angular displacement of the gear 5 can be converted into the displacement of the rack 3, which is the displacement of the boom of the telescopic boom. This allows the current position of the boom to be determined. Furthermore, based on the correspondence between the boom's extension position and the allowable working load range of the aerial work platform, the allowable working load range of the aerial work platform matching the current position of the boom can be determined. This ensures that the boom has different allowable working load ranges at different extension positions, which helps the aerial work platform to have appropriate loads at different boom extension lengths. This allows for a larger working space and working range under different loads, while ensuring the overall safety of the machine.

[0096] It is understandable that the aerial work platform may include a load detection device, which is used to detect the load applied to the aerial work platform. The angle detection component 6 works in conjunction with the load detection device to improve the accuracy of the load corresponding to different extension positions of the boom.

[0097] It should be noted that this embodiment does not limit the specific method for calculating the current position of the boom of the telescopic boom of the aerial work platform based on the angular displacement of gear 5 in step S12, as long as this step can be achieved.

[0098] In some embodiments, calculating the current position of the boom of the aerial work platform's telescopic boom based on the angular displacement of gear 5 includes:

[0099] Every first preset time interval, the displacement of the boom within the first preset time interval is calculated based on the angular displacement of gear 5 within the first preset time interval, and the displacement of the boom within the i-th first preset time interval is denoted as k. i x i k i =1 represents the extension displacement, k i =-1 is the retraction displacement, and i is a positive integer;

[0100] Based on the cumulative displacement of the boom during the (i-1)th first preset time interval and the displacement of the boom during the ith first preset time interval, calculate the current total displacement x of the boom, x = ∑k i x i ;

[0101] Every first preset time interval, the current position of the boom is determined based on the current total displacement of the boom.

[0102] In other words, this embodiment records the boom movement within the first preset time period as a single movement. When the angle detection component 6 detects the angular displacement of the gear 5 within the first preset time period, it calculates the displacement of the boom in a single movement. The displacement of the current single movement of the boom is summed with the previously accumulated displacement. When the boom extends, the previously accumulated displacement is added to the displacement of the current single movement of the boom. When the boom retracts, the previously accumulated displacement is subtracted from the displacement of the current single movement of the boom. Every first preset time period, the current position of the boom is determined based on the current total displacement of the boom. That is, every first preset time period, the current allowable working load range of the aerial work platform is determined. Therefore, the allowable working load range in multiple areas of the aerial work platform can be obtained, improving the accuracy and reliability of the operation.

[0103] It should be noted that the first preset time in this embodiment refers to a period of time. This embodiment does not limit the specific duration of the first preset time. For example, the first preset time can be 0.2 seconds or other durations.

[0104] In addition, such as Figure 7 As shown, in addition to the telescopic boom cable device, aerial work platform, and aerial work platform control method described above, this embodiment of the invention also provides another aerial work platform control method. This aerial work platform control method is applied to the aforementioned aerial work platform and includes steps S21-S24:

[0105] S21: Every second preset time interval, the angle detection component 6 of the telescopic boom drag chain device of the aerial work platform is used to detect the angular displacement of the gear 5 of the telescopic boom drag chain device within the second preset time interval.

[0106] S22: Calculate the extension speed of the boom of the aerial work platform within the second preset time based on the angular displacement of gear 5 within the second preset time.

[0107] S23: Determine whether the boom extension / retraction speed exceeds the preset speed value;

[0108] S24: If so, control the power unit of the boom to slow down the boom until the extension and retraction speed meets the preset speed value.

[0109] In other words, this embodiment uses the angle detection component 6 to detect the angular displacement of the gear 5 in real time. Based on the transmission ratio between the gear 5 and the rack 3, the angular displacement of the gear 5 can be converted into the displacement of the rack 3, which is the displacement of the boom of the telescopic boom. In this embodiment, the extension displacement of the boom is calculated once every second preset time interval, and then the extension speed of the boom in the current second preset time interval is calculated once. This determines whether the extension speed of the boom in a single action within the second preset time interval is within the preset speed value, so as to determine whether the boom is overspeeding. When the boom extension action is overspeeding, the speed of the boom is controlled by the control power device to decelerate the boom until the speed of the boom is within the preset speed value, so as to ensure the safety and reliability of the boom extension.

[0110] It should be noted that the second preset time in this embodiment refers to a period of time. This embodiment does not limit the specific duration of the second preset time. The duration of the second preset time can be the same as the duration of the first preset time or different from the duration of the first preset time. For example, the second preset time can be 0.2 seconds or other durations. It is understandable that calculating the boom displacement within a first preset time interval based on the angular displacement of gear 5 within that first preset time interval, and calculating the boom extension speed within a second preset time interval based on the angular displacement of gear 5 of the telescopic boom chain device within a second preset time interval using the angle detection component 6 of the telescopic boom chain device, are two different technical solutions. Both involve monitoring the boom displacement and boom extension speed separately. Considering the convenience of calculation and control, it is preferable that the first and second preset time intervals are the same length. In this case, a single timing can be used to simultaneously calculate the boom displacement and the boom extension speed. That is, every certain period of time, the angular displacement of gear 5 of the telescopic boom chain device is detected by the angle detection component 6 of the telescopic boom chain device within that period of time, and then the boom displacement and boom extension speed are calculated in two directions respectively based on the angular displacement of gear 5 within that period of time.

[0111] In addition, this embodiment does not limit the specific structure of the power unit. For example, the power unit can be a pump motor. When the extension and retraction of the boom exceeds the speed, the extension and retraction speed of the boom can be reduced by reducing the speed of the pump motor.

[0112] It should also be noted that, in this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0113] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0114] The telescopic boom cable chain device, aerial work platform, and aerial work platform control method provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of this invention.

Claims

1. An aerial work platform, characterized in that, include: A telescopic boom includes a fixed boom and a movable boom slidably connected to the fixed boom; One end of the cable chain (1) is connected to the fixed boom; The cable chain conduit (2) is connected to the other end of the cable chain (1) and to the boom. The cable chain conduit (2) is provided with a rack (3). Mounting base (4) is connected to the fixed arm; The gear (5) is rotatably mounted on the mounting base (4) and meshes with the rack (3); An angle detection element (6) is provided on the mounting base (4) and is used to detect the angular displacement of the gear (5); A power unit, connected to the boom, is used to drive the boom to move so that the boom drives the drag chain guide (2) and the rack (3) to move, thereby driving the gear (5) to rotate; The control device is used to calculate the current position of the boom based on the angular displacement detected by the angle detection element (6), and to determine the allowable working load range corresponding to the aerial work platform based on the current position. And / or, The control device is used to detect the angular displacement of the gear (5) within the second preset time period using the angle detection element (6) at every second preset time period; calculate the extension and retraction speed of the boom within the second preset time period based on the angular displacement of the gear (5) within the second preset time period; determine whether the extension and retraction speed exceeds the preset speed value; if so, control the power device to decelerate the boom until the extension and retraction speed meets the preset speed value.

2. The aerial work platform according to claim 1, characterized in that, Also includes: An elastic member (7) is provided on the mounting base (4) for applying an elastic force to the gear (5) so that the gear (5) remains engaged with the rack (3).

3. The aerial work platform according to claim 2, characterized in that, The angle detection component (6) includes a rotating shaft and an angle sensor connected to the rotating shaft. The gear (5) is connected to the rotating shaft. The rotating shaft is rotatably disposed on the floating component (8). The floating component (8) is slidably disposed on the mounting base (4). The sliding direction of the floating component (8) is the same as the extension and retraction direction of the elastic member (7). The elastic member (7) is disposed between the floating component (8) and the mounting base (4).

4. The aerial work platform according to any one of claims 1-3, characterized in that, Also includes: The roller (9) is rotatably mounted on the mounting base (4) and abuts against the bottom of the drag chain guide (2).

5. The aerial work platform according to any one of claims 1-3, characterized in that, Also includes: Lateral limiting device (10) is provided on the mounting base (4) and located on both sides of the drag chain conduit (2) for limiting both sides of the drag chain conduit (2).

6. The aerial work platform according to claim 5, characterized in that, The lateral limiting device (10) includes a spherical hinge bearing (101) or a ball bearing, which is used to contact the side of the drag chain conduit (2).

7. A control method for an aerial work platform, characterized in that, The aerial work platform control method, applied to any one of claims 1-6, comprises: The angular displacement of the gear (5) of the telescopic boom drag chain device of the aerial work platform is detected by the angle detection component (6); The current position of the boom of the aerial work platform is calculated based on the angular displacement. The allowable working load range of the aerial work platform is determined based on the current location.

8. The aerial work platform control method according to claim 7, characterized in that, Calculating the current position of the boom of the aerial work platform based on the angular displacement includes: Every first preset time interval, the displacement of the boom within the first preset time interval is calculated based on the angular displacement of the gear (5) within the first preset time interval. The displacement of the boom within the i-th first preset time interval is kixi, where ki=1 is the extension displacement, ki=-1 is the retraction displacement, and i is a positive integer. Based on the cumulative displacement of the boom during the (i-1)th first preset time period and the displacement of the boom during the ith first preset time period, calculate the current total displacement x of the boom, x=∑kixi; At each of the first preset time intervals, the current position of the boom is determined based on the total displacement.

9. A control method for an aerial work platform, characterized in that, The aerial work platform control method, applied to any one of claims 1-6, comprises: Every second preset time interval, the angle detection component (6) of the telescopic boom drag chain device of the aerial work platform is used to detect the angular displacement of the gear (5) of the telescopic boom drag chain device within the second preset time interval; Based on the angular displacement of the gear (5) within the second preset time, calculate the extension speed of the boom of the telescopic arm of the aerial work platform within the second preset time. Determine whether the extension / retraction speed exceeds a preset speed value; If so, control the power device of the boom to decelerate the boom until the extension / retraction speed meets the preset speed value.

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