boom telescopic control system and aerial work equipment

Abstract

This invention discloses a boom telescopic control system and an aerial work platform. The boom telescopic control system includes a boom assembly, a positioning detection component, and a triggering component. The boom assembly includes a base boom and a telescopic boom retractably installed within the base boom. The positioning detection component includes a first positioning detector and a second positioning detector mounted on the base boom near its telescopic opening. The triggering component includes a retraction trigger and an extension trigger. The retraction trigger is mounted on the telescopic boom near its outer end and is used to trigger the first and second positioning detectors respectively. The extension trigger is mounted on the telescopic boom near its inner end and is used to trigger the first positioning detector individually. The boom telescopic control system of this invention uses only two limit switches to detect whether the boom assembly is approaching its retraction / extension limit position. Compared with the prior art, this significantly improves the control effect, simplifies the structure, reduces costs, and reduces potential failure points.

Description

Technical Field

[0001] This invention belongs to the technical field of aerial work equipment, specifically relating to a boom telescopic control system and aerial work equipment. Background Technology

[0002] Self-propelled aerial work platforms must comply with the relevant provisions of GB 25849, and the equipment must have the ability to detect whether the boom is in a safe position. To improve the operability and comfort of the equipment, limit switches are usually used to detect whether the boom is approaching its extension limit position, so as to control the extension and retraction movement of the boom.

[0003] Taking a two-section boom consisting of a basic boom 01 and a telescopic boom 02 as an example, there are currently two main types of limit switch arrangements: the first type has no extension limit detection, such as... Figure 1 As shown, there are two limit switches 03, and both limit switches 03 are triggered simultaneously when the boom retracts to the safe position; the second type is independent extension limit detection, such as... Figure 2 As shown, there are three limit switches 03. Two limit switches 03 are triggered simultaneously when the boom retracts to the safe position, and the other limit switch 03 is triggered when the boom extends close to its limit position. Without extension limit detection, it is impossible to detect when the boom is extended close to its limit position, resulting in poor control. Independent extension limit detection requires three limit switches, which is relatively complex in structure, more expensive, and has more potential points of failure. Summary of the Invention

[0004] To address the aforementioned deficiencies or shortcomings, this invention provides a boom extension control system and aerial work platform, aiming to solve the technical problems of two existing limit switch arrangements: one cannot detect when the boom extends close to its limit position, and the other results in high cost and numerous failure points due to the large number of limit switches used.

[0005] To achieve the above objectives, the present invention provides a boom telescopic control system, wherein the boom telescopic control system includes: a boom assembly, a positioning detection component, and a triggering component; the boom assembly includes a base boom and a telescopic boom retractably installed within the base boom; the positioning detection component includes a first positioning detector and a second positioning detector mounted on the base boom near the telescopic opening; the triggering component includes a retraction trigger and an extension trigger, the retraction trigger being mounted on the telescopic boom near its outer end and used to trigger the first positioning detector and the second positioning detector respectively, and the extension trigger being mounted on the telescopic boom near its inner end and used to trigger the first positioning detector individually.

[0006] In this embodiment of the invention, a detection port is provided at one end of the basic arm near the telescopic opening. The first positioning detector and the second positioning detector are installed in parallel and spaced apart on the outside of the basic arm, corresponding to the detection port. The retraction trigger is installed on the outside of the telescopic arm and is used to simultaneously trigger the first positioning detector and the second positioning detector when exposed to the detection port. The extension trigger is installed on the outside of the telescopic arm and is used to trigger the first positioning detector alone when exposed to the detection port.

[0007] In this embodiment of the invention, the first positioning detector and the second positioning detector are configured as limit switches with contacts. The main bodies of the first positioning detector and the second positioning detector are respectively disposed on opposite sides of the detection port. The contact parts of the first positioning detector and the second positioning detector extend toward the detection port. The retractable trigger is disposed across the contact parts of the first positioning detector and the second positioning detector, and the extended trigger is disposed corresponding to the contact part of the first positioning detector.

[0008] In this embodiment of the invention, the boom telescopic control system further includes a controller that is communicatively connected to the first positioning detector, the second positioning detector, and the telescopic boom, respectively. The controller is configured to:

[0009] When the telescopic arm is retracting and both the first and second positioning detectors are triggered, determine that the telescopic arm has reached the retraction buffer position and control the telescopic arm to decelerate.

[0010] When the telescopic boom extends and the first positioning detector is triggered individually, the telescopic boom is determined to have reached the extension buffer position and the telescopic boom is controlled to decelerate.

[0011] In this embodiment of the invention, when the telescopic arm is retracting and both the first and second positioning detectors are triggered, determining that the telescopic arm has reached the retraction buffer position and controlling the telescopic arm to decelerate includes:

[0012] Control the telescopic arm to retract;

[0013] Upon receiving dual signals indicating that both the first and second positioning detectors have been triggered, it is determined that the telescopic arm has reached the retracted buffer position.

[0014] The telescopic boom is controlled to decelerate linearly from the retracted buffer position to the retracted limit position and then stop.

[0015] In this embodiment of the invention, when the telescopic arm extends and the first positioning detector is triggered alone, determining that the telescopic arm has reached the extension buffer position and controlling the telescopic arm to decelerate includes:

[0016] Control the telescopic arm to extend;

[0017] Upon receiving a single signal that the first positioning detector has been triggered, it is determined that the telescopic arm has reached the extended buffer position;

[0018] The telescopic boom is controlled to decelerate linearly from the extended buffer position to the extended limit position and stop.

[0019] In this embodiment of the invention, the controller is further configured as follows:

[0020] If a single triggered signal is received during the retraction of the telescopic boom to its retraction limit position, and if the telescopic boom does not decelerate during its extension to its extension limit position, the first positioning detector is determined to be faulty and an alarm is triggered.

[0021] In this embodiment of the invention, the controller is further configured as follows:

[0022] If a single triggered signal is received during the retraction of the telescopic arm to its retraction limit position, and if deceleration occurs during the extension of the telescopic arm to its extension limit position, the second positioning detector is determined to be faulty and an alarm is triggered.

[0023] In this embodiment of the invention, the controller is further configured as follows:

[0024] If no deceleration is performed during the retraction of the telescopic boom to its retraction limit position and during the extension of the telescopic boom to its extension limit position, it is determined that both the first positioning detector and the second positioning detector are faulty and trigger an alarm.

[0025] To achieve the above objectives, the present invention also provides an aerial work platform, wherein the aerial work platform includes a boom telescopic control system as described above.

[0026] Through the above technical solution, the boom telescopic control system provided by the embodiments of the present invention has the following beneficial effects:

[0027] When using the above-described boom telescopic control system, since it includes a boom assembly, a positioning detection component, and a triggering component, the first and second positioning detectors of the positioning detection component are mounted on the basic boom near the telescopic opening. The retraction trigger of the triggering component is mounted on the telescopic boom near its outer end and is used to trigger the first and second positioning detectors respectively. This allows the first and second positioning detectors to trigger detection when the telescopic boom of the boom assembly is retracted to a safe position. The extension trigger is mounted on the telescopic boom near its inner end and is used to trigger the first positioning detector individually, allowing the first positioning detector to trigger detection when the telescopic boom is extended to near its limit position. The boom telescopic control system of the present invention uses only two limit switches to detect whether the boom assembly is close to its retraction / extension limit position. Compared with the arrangement of the prior art without extension limit detection, the control effect is significantly improved. Compared with the arrangement of independent extension limit detection, fewer limit switches are used, achieving the purpose of simplifying the structure, reducing costs, and reducing failure points.

[0028] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0029] The accompanying drawings are provided to illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the arrangement of the non-extend limit detection in the background technology;

[0031] Figure 2 This is a structural schematic diagram of the arrangement of independent extension limit detection in the background technology;

[0032] Figure 3 This is a schematic diagram of a telescopic position of a boom telescopic control system according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of another telescopic position of the boom telescopic control system according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the first position detector and the second position detector according to an embodiment of the present invention;

[0035] Figure 6 This is a flowchart of the retraction movement of a telescopic arm according to an embodiment of the present invention;

[0036] Figure 7This is a flowchart of the extension movement of a telescopic arm according to an embodiment of the present invention.

[0037] Background Art, Illustrations and Labeling

[0038] 01 Basic Arm 02 Telescopic Arm

[0039] 03 Limit Switch

[0040] Explanation of reference numerals in the attached figures

[0041] 100 Boom assembly 101 Basic boom

[0042] 102 Telescopic Arm 200 Position Detection Component

[0043] 201 First position detector 202 Second position detector

[0044] 203 Main body 204 Contact part

[0045] 300 Retractable trigger 400 Extendable trigger Detailed Implementation

[0046] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0047] Self-propelled aerial work platforms must comply with the relevant provisions of GB 25849, and the equipment must have the ability to detect whether the boom is in a safe position. To improve the operability and comfort of the equipment, limit switches are usually used to detect whether the boom is approaching its extension limit position, so as to control the extension and retraction movement of the boom.

[0048] Taking a two-section boom consisting of a basic boom 01 and a telescopic boom 02 as an example, there are currently two main types of limit switch arrangements: the first type has no extension limit detection, such as... Figure 1 As shown, there are two limit switches 03, and both limit switches 03 are triggered simultaneously when the boom retracts to the safe position; the second type is independent extension limit detection, such as... Figure 2 As shown, there are three limit switches 03. Two limit switches 03 are triggered simultaneously when the boom retracts to the safe position, and the other limit switch 03 is triggered when the boom extends close to its limit position. Without extension limit detection, it is impossible to detect when the boom is extended close to its limit position, resulting in poor control. Independent extension limit detection requires three limit switches, which is relatively complex in structure, more expensive, and has more potential points of failure.

[0049] In view of this, the present invention provides a boom extension control system and aerial work equipment, which can detect whether the boom device is close to the retracted / extended limit position by only two limit switches, namely the first position detector and the second position detector.

[0050] The boom telescopic control system and aerial work equipment of the present invention are described below with reference to the accompanying drawings.

[0051] like Figure 3 and Figure 4 This invention provides a boom telescopic control system, wherein the boom telescopic control system includes:

[0052] The boom assembly 100 includes a base boom 101 and a telescopic boom 102 telescopically mounted within the base boom 101.

[0053] The positioning detection assembly 200 includes a first positioning detector 201 and a second positioning detector 202 mounted on the base arm 101 near the telescopic port of the base arm 101.

[0054] The triggering assembly includes a retractable trigger 300 and an extendable trigger 400. The retractable trigger 300 is mounted on the telescopic arm 102 near its outer end and is used to trigger the first position detector 201 and the second position detector 202 respectively. The extendable trigger 400 is mounted on the telescopic arm 102 near its inner end and is used to trigger the first position detector 201 individually.

[0055] When using the above-described boom telescopic control system, since it includes a boom assembly 100, a positioning detection component 200, and a triggering component, the first positioning detector 201 and the second positioning detector 202 of the positioning detection component 200 are mounted on the base boom 101 near the telescopic port. The retraction trigger 300 of the triggering component is mounted on the telescopic boom 102 near its outer end and is used to trigger the first positioning detector 201 and the second positioning detector 202 respectively. This allows the first positioning detector 201 and the second positioning detector 202 to be triggered when the telescopic boom 102 of the boom assembly 100 is retracted to a safe position. The trigger 400 is installed on the telescopic boom 102 near its inner end and is used to trigger the first position detector 201 independently. This allows the first position detector 201 to also trigger detection when the telescopic boom 102 extends to a position close to its limit. The boom telescopic control system of the present invention uses only two limit switches to detect whether the boom device 100 is close to the retraction / extension limit position. Compared with the arrangement of the prior art without extension limit detection, the control effect is significantly improved. Compared with the arrangement of independent extension limit detection, fewer limit switches are used, which simplifies the structure, reduces costs, and reduces failure points.

[0056] It should be noted that the telescopic port of the basic arm is the port where the telescopic arm can extend out. The outer end of the telescopic arm is the end of the telescopic arm that can extend out of the basic arm. The inner end of the telescopic arm is relative to the outer end and is the end of the telescopic arm that is always inside the basic arm.

[0057] In this embodiment of the invention, a detection port is provided at one end of the basic arm 101 near the telescopic opening. A first positioning detector 201 and a second positioning detector 202 are installed parallel to each other on the outer side of the basic arm 101, specifically, they are arranged parallel to each other along the length direction of the basic arm 101. A retraction trigger 300 is installed on the outer side of the telescopic arm 102 and is used to simultaneously trigger the first positioning detector 201 and the second positioning detector 202 when exposed to the detection port. Figure 3 As shown, the retractable trigger 300 is exposed at the detection port at the illustrated position and simultaneously triggers the first positioning detector 201 and the second positioning detector 202; the extended trigger 400 is installed on the outside of the telescopic arm 102 and is used to trigger the first positioning detector 201 alone when exposed at the detection port, as shown. Figure 4 As shown, the extension trigger 400 is exposed at the detection port at the illustrated position and independently triggers the first positioning detector 201. By mounting the first positioning detector 201 and the second positioning detector 202 on the outside of the base arm 101, and the retraction trigger 300 and the extension trigger 400 on the outside of the telescopic arm 102, the first positioning detector 201 and the second positioning detector 202 will not interfere with the retraction and extension movements of the telescopic arm 102, and are easy to replace and maintain. Furthermore, a detection port is provided on the base arm 101 so that the retraction trigger 300 and the extension trigger 400 can be exposed on the base arm 101 during the telescopic arm 102's extension and retraction movements and trigger the corresponding limit switches. Specifically, the first positioning detector 201 and the second positioning detector 202 can be detachably mounted on the base arm 101 using threaded fasteners.

[0058] See Figures 3 to 5In this embodiment of the invention, the first positioning detector 201 and the second positioning detector 202 can be configured as limit switches with contacts. The main body portions 203 of the first positioning detector 201 and the second positioning detector 202 are respectively disposed on opposite sides of the detection port. The contact portions 204 of the first positioning detector 201 and the second positioning detector 202 extend toward the detection port facing each other. The retractable trigger 300 is disposed across the contact portions 204 of the first positioning detector 201 and the second positioning detector 202. The extended trigger 400 is disposed corresponding to the contact portion 204 of the first positioning detector 201. That is, the first positioning detector 201 and the second positioning detector 202 can be selected as limit switches with contacts, so that the retractable trigger 300 and the extended trigger 400 that trigger the first and second limit switches can be configured as contact strips for abutting against the contact portions 204 of the limit switches. This makes the production cost of the retractable trigger 300 and the extended trigger 400 relatively low and easy to install. Specifically, the design trigger width of the contact bar of the retractable trigger 300 should be able to span the contact portion 204 of the first position detector 201 and the second position detector 202, so that the retractable trigger 300 can trigger the first position detector 201 and the second position detector 202 simultaneously. Since the contact bar of the extendable trigger 400 only needs to trigger the first position detector 201, the design trigger width of the extendable trigger 400 can be smaller than the design trigger width of the retractable trigger 300.

[0059] Of course, the present invention is not limited to this. The first position detector 201 and the second position detector 202 can also be configured as inductive switches, such as infrared inductive switches, microwave inductive switches, ultrasonic inductive switches, piezoelectric inductive switches, electromagnetic inductive switches, and other suitable optical, electrical, and magnetic inductive switches. However, in order to cooperate with the above inductive switches, the production cost of the retractable trigger 300 and the extended trigger 400 increases.

[0060] In this embodiment of the invention, the boom telescopic control system further includes a controller that is communicatively connected to the first positioning detector 201, the second positioning detector 202, and the telescopic boom 102, respectively. The controller is configured to perform the following steps:

[0061] When the telescopic arm 102 is retracting and both the first positioning detector 201 and the second positioning detector 202 are triggered, it is determined that the telescopic arm 102 has reached the retraction buffer position and the telescopic arm 102 is controlled to decelerate.

[0062] Specifically, if the controller receives a dual signal indicating that the limit switch has been triggered when the telescopic boom 102 is retracting, it proves that both the first positioning detector 201 and the second positioning detector 202 have been triggered normally. This confirms that the telescopic boom 102 has retracted to the retraction buffer position, which is close to the retraction limit position and 150mm to 300mm away (specifically 200mm). At this point, the controller can begin to decelerate the telescopic boom 102 to prevent jerking when it reaches the retraction limit position, ensuring the smoothness of the boom device 100's retraction movement. It should be noted that the retraction limit position refers to the final stopping position of the telescopic boom 102 during its retraction movement. Throughout the process of the telescopic boom 102 retracting from the retraction buffer position to the retraction limit position, the retraction trigger 300 continuously triggers both the first positioning detector 201 and the second positioning detector 202.

[0063] When the telescopic arm 102 extends and the first positioning detector 201 is triggered individually, it is determined that the telescopic arm 102 has reached the extension buffer position and the telescopic arm 102 is controlled to decelerate.

[0064] Specifically, if the controller receives a single signal indicating that the limit switch has been triggered when the telescopic boom 102 is extending, it proves that the first positioning detector 201 has been triggered normally, and it can be determined that the telescopic boom 102 has extended to the extension buffer position, which is close to the extension limit position and 150mm to 300mm away from the extension limit position, specifically 200mm. At this time, the controller can start to control the telescopic boom 102 to decelerate, preventing the telescopic boom 102 from stopping at the extension limit position and causing a jerking phenomenon, thus ensuring the smoothness of the boom device 100's retraction movement. It should be noted that the extension limit position refers to the final stopping position of the telescopic boom 102 during its extension movement. During the process of the telescopic boom 102 extending from the extension buffer position to the extension limit position, the extension trigger 400 always maintains the triggering of the first positioning detector 201.

[0065] like Figure 6 As shown, in this embodiment of the invention, when the telescopic arm 102 is retracting and both the first positioning detector 201 and the second positioning detector 202 are triggered, determining that the telescopic arm 102 has reached the retraction buffer position and controlling the telescopic arm 102 to decelerate includes the following steps:

[0066] Step 100: Control the telescopic arm 102 to retract.

[0067] Step 110: Upon receiving dual signals indicating that both the first positioning detector 201 and the second positioning detector 202 have been triggered, it is determined that the telescopic arm 102 has reached the retracted buffer position.

[0068] Step 120: Control the telescopic arm 102 to decelerate linearly from the retracted buffer position to the retracted limit position and stop.

[0069] Furthermore, the above steps can be the entire process of the telescopic boom 102 retracting. The controller can first control the telescopic boom 102 to retract at a first speed. After the controller receives the dual signals that the first positioning detector 201 and the second positioning detector 202 are both triggered, and the dual signals can be triggered simultaneously, it can be determined that the telescopic boom 102 has retracted to the retraction buffer position. At this time, the telescopic boom 102 can be controlled to start linear deceleration at the first speed until the telescopic boom 102 retracts to the retraction limit position and stops, thereby further ensuring the stability of the boom device 100.

[0070] like Figure 7 As shown, in this embodiment of the invention, when the telescopic arm 102 extends and the first positioning detector 201 is triggered alone, determining that the telescopic arm 102 has reached the extension buffer position and controlling the telescopic arm 102 to decelerate includes the following steps:

[0071] Step 200: Control the telescopic arm 102 to extend.

[0072] Step 210: A single signal is received indicating that the first positioning detector 201 has been triggered, confirming that the telescopic arm 102 has reached the extended buffer position.

[0073] Step 220: Control the telescopic arm 102 to decelerate linearly from the extended buffer position to the extended limit position and stop.

[0074] Furthermore, the above steps can be considered the entire process of the telescopic boom 102 extending. The controller can first control the telescopic boom 102 to extend at a second speed. After the controller receives a single signal indicating that the first positioning detector 201 has been triggered, it can determine that the telescopic boom 102 has extended to the extension buffer position. At this point, the controller can control the telescopic boom 102 to begin linear deceleration at the second speed until it extends to its extension limit position and then stops, thereby further ensuring the stability of the boom device 100. It should be noted that the second speed can be equal to or different from the first speed, and can be set accordingly based on specific needs.

[0075] In this embodiment of the invention, the controller is further configured as follows:

[0076] If a single triggered signal is received during the retraction of the telescopic boom 102 to its retraction limit position, and if the telescopic boom 102 does not decelerate during its extension to its extension limit position, the first positioning detector 201 is determined to be faulty and an alarm is triggered.

[0077] Specifically, if only a single triggered signal is received during the retraction movement of the telescopic arm 102 to the retraction limit position, it indicates that one of the first positioning detector 201 and the second positioning detector 202 has malfunctioned. If no deceleration or buffering occurs during the extension movement of the telescopic arm 102 to the extension limit position, it can be determined that the first positioning detector 201, which is corresponding to the extension trigger 400, has malfunctioned. In this case, the controller can display an alarm indicating "first positioning detector 201 malfunction" to facilitate the operator's handling and thus help to quickly locate the fault.

[0078] In this embodiment of the invention, the controller is further configured as follows:

[0079] If a single signal is received during the retraction of the telescopic arm 102 to its retraction limit position, and if deceleration occurs during the extension of the telescopic arm 102 to its extension limit position, the second positioning detector 202 is determined to be faulty and an alarm is triggered.

[0080] Specifically, if only a single triggered signal is received during the retraction movement of the telescopic arm 102 to its retraction limit position, it indicates that one of the first positioning detector 201 and the second positioning detector 202 has malfunctioned. If there is a deceleration buffer during the extension movement of the telescopic arm 102 to its extension limit position, it can be determined that the first positioning detector 201 corresponding to the extension trigger 400 is detecting normally, thus proving that the second positioning detector 202 has malfunctioned. At this time, the controller can display an alarm for "second positioning detector 202 malfunction" to facilitate the operator's corresponding handling and thus help to quickly find the fault point.

[0081] In this embodiment of the invention, the controller is further configured as follows:

[0082] If no deceleration is performed during the process of the telescopic boom 102 retracting to its retracted limit position and during the process of the telescopic boom 102 extending to its extended limit position, it is determined that both the first positioning detector 201 and the second positioning detector 202 have malfunctioned and alarms are triggered.

[0083] Specifically, if the telescopic arm 102 fails to decelerate or buffer during its retraction movement to the retraction limit position, and also fails to decelerate or buffer during its extension movement to the extension limit position, then both the first positioning detector 201 and the second positioning detector 202 are faulty. In this case, the controller can display an alarm indicating a fault in either the first positioning detector 201 or the second positioning detector 202, allowing operators to take appropriate action and quickly locate the fault. However, this invention is not limited to this. It can also be determined that both the first positioning detector 201 and the second positioning detector 202 are faulty if no triggered signal is received during the retraction movement of the telescopic arm 102 to the retraction limit position, and also if no triggered signal is received during the extension movement of the telescopic arm 102 to the extension limit position. Furthermore, both methods can be combined for mutual verification to ensure the accuracy of fault location and avoid misjudgment.

[0084] To achieve the above objectives, the present invention also provides an aerial work platform, wherein the aerial work platform includes a boom telescopic control system according to the above-described embodiments. Since the aerial work platform adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0085] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0086] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0088] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A boom reach control system characterized by, The arm frame telescopic control system comprises: an arm frame device (100) comprising a basic arm (101) and a telescopic arm (102) telescopically mounted in the basic arm (101); a position detection assembly (200) comprising a first position detector (201) and a second position detector (202) mounted on the basic arm (101) near a telescopic opening of the basic arm (101); a triggering assembly comprising a retracting trigger (300) and an extending trigger (400), the retracting trigger (300) being mounted on the telescopic arm (102) near an outer end of the telescopic arm (102) and used for triggering the first position detector (201) and the second position detector (202) respectively, the extending trigger (400) being mounted on the telescopic arm (102) near an inner end of the telescopic arm (102) and used for triggering the first position detector (201) alone; a design triggering width of the extending trigger (400) is set to be smaller than a design triggering width of the retracting trigger (300); the arm frame telescopic control system further comprises a controller in communication connection with the first position detector (201), the second position detector (202) and the telescopic arm (102) respectively, the controller being configured to: determine that the first position detector (201) is faulty and give an alarm in a case that a single signal triggered is received in a process of retracting the telescopic arm (102) to a retracted limit position and there is no deceleration in a process of extending the telescopic arm (102) to an extended limit position; determine that the second position detector (202) is faulty and give an alarm in a case that a single signal triggered is received in a process of retracting the telescopic arm (102) to a retracted limit position and there is deceleration in a process of extending the telescopic arm (102) to an extended limit position.

2. The boom telescoping control system of claim 1, wherein, the basic arm (101) is provided with a detection opening near one end of a telescopic opening, the first position detector (201) and the second position detector (202) are installed on an outer side of the basic arm (101) in line and interval corresponding to the detection opening, the retracting trigger (300) is installed on an outer side of the telescopic arm (102) and used for triggering the first position detector (201) and the second position detector (202) simultaneously in a case of being exposed to the detection opening, and the extending trigger (400) is installed on an outer side of the telescopic arm (102) and used for triggering the first position detector (201) alone in a case of being exposed to the detection opening.

3. The boom telescoping control system of claim 2, wherein, The first and second position detectors (201, 202) are configured as limit switches with contacts, the main bodies (203) of the first and second position detectors (201, 202) are arranged on opposite sides of the detection port, the contact portions (204) of the first and second position detectors (201, 202) are arranged towards the detection port, the retraction trigger (300) is arranged across the contact portions (204) of the first and second position detectors (201, 202), and the extension trigger (400) is arranged corresponding to the contact portion (204) of the first position detector (201).

4. The boom telescoping control system of claim 1, wherein, The controller is configured to: determine that the telescopic arm (102) reaches a retraction buffer position and control the telescopic arm (102) to decelerate when the telescopic arm (102) is in retraction movement and both the first and second position detectors (201, 202) are triggered; determine that the telescopic arm (102) reaches an extension buffer position and control the telescopic arm (102) to decelerate when the telescopic arm (102) is in extension movement and only the first position detector (201) is triggered.

5. The boom telescoping control system of claim 4, wherein, The determination that the telescopic arm (102) reaches a retraction buffer position and control the telescopic arm (102) to decelerate when the telescopic arm (102) is in retraction movement and both the first and second position detectors (201, 202) are triggered includes: controlling the telescopic arm (102) to perform retraction movement; receiving a double signal that both the first and second position detectors (201, 202) are triggered to determine that the telescopic arm (102) reaches the retraction buffer position; controlling the telescopic arm (102) to linearly decelerate from the retraction buffer position to a retraction limit position to stop.

6. The boom telescoping control system of claim 4, wherein, The determination that the telescopic arm (102) reaches an extension buffer position and control the telescopic arm (102) to decelerate when the telescopic arm (102) is in extension movement and only the first position detector (201) is triggered includes: controlling the telescopic arm (102) to perform extension movement; receiving a single signal that the first position detector (201) is triggered to determine that the telescopic arm (102) reaches the extension buffer position; controlling the telescopic arm (102) to linearly decelerate from the extension buffer position to an extension limit position to stop.

7. The boom telescoping control system of claim 4, wherein, The controller is further configured to: determine that both the first and second position detectors (201, 202) are malfunctioning and perform an alarm when neither the telescopic arm (102) is decelerated during retraction to a retraction limit position nor the telescopic arm (102) is decelerated during extension to an extension limit position.

8. An aerial work platform, characterized in that, The aerial work equipment includes the telescopic arm control system according to any one of claims 1 to 7.

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