Telescopic arm locking device and working machine

Abstract

This invention discloses a telescopic boom locking device and a working machine. The telescopic boom locking device includes a boom pin and a locking mechanism. The boom pin is telescopically mounted on the inner boom section and used to lock the outer boom section. The boom pin has a mounting hole. The locking mechanism includes a limit ball, a locking rod, and a telescopic drive assembly. The limit ball is located within the mounting hole. The locking rod telescopically passes through the boom pin and has a receiving groove. The telescopic drive assembly drives the locking rod to extend and retract. When the receiving groove aligns with the mounting hole, the limit ball falls into the receiving groove, allowing the locking rod to drive the boom pin to extend and retract. When the receiving groove is misaligned with the mounting hole, the limit ball abuts against the locking rod, causing the limit ball to extend out of the mounting hole and restrict the extension and retraction of the boom pin. By providing a receiving groove on the locking rod and a limit ball within the mounting hole of the boom pin, the telescopic boom locking device effectively prevents the boom pin from jamming or failing to extend fully, significantly improving the stability and reliability of locking and unlocking the telescopic boom.

Description

Technical Field

[0001] This invention belongs to the field of work machinery technology, specifically relating to a telescopic boom locking device and work machinery. Background Technology

[0002] Telescopic booms typically consist of an outermost base boom and multiple boom sections that are retractably fitted inside the base boom. Currently, locking between boom sections usually relies on boom pins passing through two adjacent boom sections. However, existing locking devices only drive the boom pins to extend or retract to lock or unlock two adjacent boom sections. If the boom pins rub or collide with the boom sections during insertion or removal, the boom pins may become stuck or fail to extend or retract fully, leading to unstable boom section locking, misalignment, inability to extend or retract, and even safety hazards such as boom collapse or boom pin breakage. The locking stability is poor and the reliability is low. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies, the present invention provides a telescopic boom locking device and a working machine, which aims to solve the technical problems of poor locking stability and low reliability of existing telescopic boom locking devices.

[0004] To achieve the above objectives, the present invention provides a telescopic arm locking device, the telescopic arm locking device comprising: Arm pin, which is telescopically mounted on the inner arm section of the telescopic arm and used to lock the outer arm section of the telescopic arm, has mounting holes. The insertion / removal mechanism includes a limit ball, an insertion / removal rod, and a telescopic drive assembly. The limit ball is located in the mounting hole. The insertion / removal rod is telescopically passed through the arm pin and has a receiving groove. The telescopic drive assembly is used to drive the insertion / removal rod to extend and retract. When the receiving groove is aligned with the mounting hole, the limit ball falls into the receiving groove so that the insertion / removal rod can drive the arm pin to extend and retract through the limit ball. When the receiving groove is misaligned with the mounting hole, the limit ball abuts against the insertion / removal rod so that the limit ball extends out of the mounting hole and restricts the extension and retraction of the arm pin.

[0005] In this embodiment of the invention, the arm pin has a mounting cavity for the insertion / removal rod to pass through, the mounting hole communicates with the mounting cavity, the cavity wall of the mounting cavity has a mounting groove, the insertion / removal mechanism also includes a reset drive assembly, the reset drive assembly is disposed in the mounting groove, the reset drive assembly is used to drive the insertion / removal rod to reset and abut against the limit ball.

[0006] In this embodiment of the invention, the insertion rod is provided with a set of receiving slots, which includes two receiving slots spaced apart along the length of the insertion rod. The two receiving slots are respectively designated as a first receiving slot and a second receiving slot, and a limiting abutment platform is formed between the first receiving slot and the second receiving slot. The first receiving slot and the second receiving slot are respectively used for a limiting ball to fall into. The reset drive assembly is used to drive the insertion rod to reset so that the limiting abutment platform abuts against the limiting ball.

[0007] In this embodiment of the invention, the reset drive assembly includes a first spring and a second spring. Both the first spring and the second spring are sleeved on the insertion rod. The mounting groove has a first pressing groove wall and a second pressing groove wall that are arranged opposite to each other. The insertion rod is provided with a pressing boss. The two ends of the first spring abut against the first pressing groove wall and the pressing boss respectively. The two ends of the second spring abut against the second pressing groove wall and the pressing boss respectively.

[0008] In this embodiment of the invention, the telescopic arm locking device further includes a detection component, which includes a piezoelectric sensor disposed in the receiving groove and used to detect the position information of the limiting ball.

[0009] In this embodiment of the invention, the telescopic drive assembly includes a telescopic drive component and a lifting seat. The telescopic drive component is disposed in the inner boom section and is used to drive the lifting seat to rise and fall. The lifting seat is provided with a transition groove, and the plug-in rod is provided with a transition block, which is connected to the transition groove.

[0010] In this embodiment of the invention, the detection component further includes an electrical connection wire and a current sensor. The electrical connection wire passes through the plug-in rod, one end of the electrical connection wire is electrically connected to the piezoelectric sensor, and the other end of the electrical connection wire is set as a current transmission end. The current sensor is located in the adapter slot and is used to detect the current signal of the current transmission end.

[0011] In this embodiment of the invention, the telescopic drive component is a telescopic hydraulic cylinder, and the detection component further includes a pressure sensor and a controller. The pressure sensor is used to detect the pressure of the telescopic hydraulic cylinder, and the controller is communicatively connected to the pressure sensor and configured to: determine the working state of the reset drive component based on the pressure of the telescopic hydraulic cylinder; and control the operating state of the telescopic hydraulic cylinder based on the working state of the reset drive component.

[0012] In this embodiment of the invention, the telescopic arm locking device further includes a limiting baffle, which is disposed on the inner arm section and has a through hole for the arm pin to pass through. The limiting baffle abuts against the limiting ball when the receiving groove and the mounting hole are misaligned.

[0013] To achieve the above objectives, the present invention also provides a working machine, which includes a telescopic boom system, and the telescopic boom system includes a telescopic boom locking device according to the above description.

[0014] Through the above technical solutions, the telescopic boom locking device and operating machinery provided in the embodiments of the present invention have the following beneficial effects: In the technical solution of this invention, the telescopic arm locking device provides a receiving groove on the insertion rod and a limiting ball in the mounting hole of the arm pin. During the locking or unlocking of the outer arm section, the limiting ball falls into the receiving groove to connect the arm pin and the insertion rod. The insertion rod can drive the arm pin to extend or retract through the limiting ball, thereby locking or unlocking the outer arm section. The limiting ball is rolled in the mounting hole to reduce friction, improve the smoothness of arm pin extension and retraction, and effectively prevent arm pin extension and retraction jamming. Furthermore, when the arm pin is fully extended to lock or unlock the outer arm section, the limiting ball extends out of the mounting hole to restrict arm pin extension and retraction, thereby limiting the arm pin to the position of locking or unlocking the outer arm section. This effectively prevents unstable locking, misalignment, and inability to extend or retract the telescopic arm due to the arm pin not being fully extended or retracted, and greatly improves the stability and reliability of locking or unlocking the telescopic arm.

[0015] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. Those skilled in the art can obtain other drawings based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram of the structure of the telescopic arm locking device locking the outer arm section according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the retraction of the arm pin in a telescopic arm locking device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the telescopic arm locking device for unlocking the outer arm section according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the extension of the arm pin in a telescopic arm locking device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a telescopic arm locking device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the arm pin and the insertion rod in a telescopic arm locking device according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the telescopic drive assembly in a telescopic arm locking device according to an embodiment of the present invention; Figure 8 This is a structural block diagram of the detection component in a telescopic arm locking device according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures Detailed Implementation

[0018] 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.

[0019] The telescopic arm locking device of the present invention will now be described with reference to the accompanying drawings.

[0020] like Figures 1 to 4 As shown, the present invention provides a telescopic arm locking device, which includes an arm pin 10 and a plug-in mechanism. The arm pin 10 is telescopically disposed on the inner arm section 201 of the telescopic arm 200 and is used to lock the outer arm section 202 of the telescopic arm 200. The arm pin 10 has a mounting hole 11. The plug-in mechanism includes a limiting ball 20, a plug-in rod 30 and a telescopic drive assembly 40. The limiting ball 20 is disposed in the mounting hole 11. The plug-in rod 30 is telescopically disposed through the arm pin 10 and has a receiving groove 31. The telescopic drive assembly 40 is used to drive the plug-in rod 30 to extend and retract. When the receiving groove 31 is aligned with the mounting hole 11, the limiting ball 20 falls into the receiving groove 31 so that the plug-in rod 30 can drive the arm pin 10 to extend and retract through the limiting ball 20. When the receiving groove 31 is misaligned with the mounting hole 11, the limiting ball 20 abuts against the plug-in rod 30 so that the limiting ball 20 extends out of the mounting hole 11 and restricts the extension and retraction of the arm pin 10.

[0021] It should be noted that the telescopic boom locking device is used to lock the telescopic boom 200. The telescopic boom 200 includes an outer boom section 202 and an inner boom section 201. The inner boom section 201 is located inside the outer boom section 202 and can extend and retract relative to the outer boom section 202. The outer boom section 202 can be a base boom or a boom section located inside the base boom. The inner boom section 201 is a boom section adjacent to the outer boom section 202. That is, any two boom sections that are adjacent from the outside to the inside can be respectively set as the outer boom section 202 located on the outside and the inner boom section 201 located on the inside. The telescopic boom locking device of the present invention is used to lock or unlock the outer boom section 202 and the inner boom section 201 that are adjacent from the outside to the inside. The embodiments of the present invention do not limit the number of boom sections of the telescopic boom 200.

[0022] Specifically, the arm pin 10 passes through the inner arm section 201 and can extend and retract relative to the inner arm section 201. A plug-in rod 30 passes through the arm pin 10, and the plug-in rod 30 has a receiving groove 31. The arm pin 10 has a mounting hole 11, and a limiting ball 20 is provided in the mounting hole 11. The telescopic drive assembly 40 is located within the inner arm section 201 and is drivenly connected to the plug-in rod 30. When it is necessary to lock or unlock the outer arm section 202, the telescopic drive assembly 40 drives the plug-in rod 30 to extend and retract, so that the receiving groove 31 on the plug-in rod 30 extends and retracts to a position communicating with the mounting hole 11. When the receiving groove 31 communicates with the mounting hole 11, the limiting ball 20 can extend into the receiving groove 31, and the side of the limiting ball 20 facing away from the receiving groove 31 retracts into the mounting hole 11. The insertion / removal lever 30 can drive the limiting ball 20 to extend and retract, so that the limiting ball 20 drives the arm pin 10 to extend and pass through the outer arm joint 202 to lock the outer arm joint 202 relative to the inner arm joint 201, or drive the arm pin 10 to retract and release the lock on the outer arm joint 202; when the arm pin 10 is locked or the outer arm joint 202 is unlocked, the insertion / removal lever 30 extends and retracts within the arm pin 10 so that the receiving groove 31 is misaligned relative to the mounting hole 11, and the insertion / removal lever 30 abuts against the limiting ball 20 so that the rod wall of the insertion / removal lever 30 pushes the limiting ball 20 outward toward the mounting hole 11. The side of the limiting ball 20 facing away from the insertion / removal lever 30 extends into the mounting hole 11 to limit the extension and retraction of the arm pin 10, thereby limiting the arm pin 10 to the position of locking or unlocking the outer arm joint 202.

[0023] In this embodiment of the invention, the telescopic arm locking device utilizes a receiving groove 31 on the insertion rod 30 and a limiting ball 20 within the mounting hole 11 of the arm pin 10. During the locking or unlocking of the outer arm segment 202 by the arm pin 10, the limiting ball 20 falls into the receiving groove 31 to connect the arm pin 10 and the insertion rod 30. The insertion rod 30 can then drive the arm pin 10 to extend or retract via the limiting ball 20, thereby locking or unlocking the outer arm segment 202. Furthermore, the limiting ball 20 is rolled within the mounting hole 11 to reduce friction and improve stability. This design ensures smooth extension and retraction of the arm pin 10, effectively preventing jamming during extension and retraction. Furthermore, when the arm pin 10 is fully extended to lock or unlock the outer arm section 202, the limiting ball 20 extends beyond the mounting hole 11 to restrict the extension and retraction of the arm pin 10. This effectively limits the arm pin 10 to the position where the outer arm section 202 is locked or unlocked, effectively preventing unstable locking, misalignment, and inability to extend or retract the telescopic arm 200 due to the arm pin 10 not being fully extended or retracted. This significantly improves the stability and reliability of locking or unlocking the telescopic arm 200.

[0024] In this embodiment of the invention, the arm pin 10 is provided with a mounting cavity 12 for the insertion / removal rod 30 to pass through, the mounting hole 11 communicates with the mounting cavity 12, and the cavity wall of the mounting cavity 12 is provided with a mounting groove 13. The insertion / removal mechanism also includes a reset drive assembly 50, which is disposed in the mounting groove 13. The reset drive assembly 50 is used to drive the insertion / removal rod 30 to reset and abut against the limiting ball 20.

[0025] like Figures 1 to 4 and Figure 6 As shown, the arm pin 10 is hollow and has a mounting cavity 12. The insertion / removal rod 30 is telescopically inserted into the mounting cavity 12. The arm pin 10 has a mounting hole 11 for mounting the limiting ball 20. The mounting hole 11 communicates with the mounting cavity 12 so that the limiting ball 20 can extend from the mounting hole 11 into the receiving groove 31 on the insertion / removal rod 30, thereby releasing the telescopic restriction on the arm pin 10. Furthermore, the cavity wall of the mounting cavity 12 has a mounting groove 13, and a reset drive assembly 50 is provided in the mounting groove 13. The reset drive assembly 50 is used to drive the insertion / removal rod 30 to reset. When the insertion / removal rod 30 is telescopically extended to the reset position, the receiving groove 31 is misaligned relative to the mounting hole 11, so that the insertion / removal rod 30... The limiting ball 20 abuts against the mounting hole 11 and pushes the limiting ball 20 outward, so that the limiting ball 20 abuts against the outer or inner side of the inner arm section 201 to limit the extension and retraction of the arm pin 10, and stably limits the arm pin 10 to the position of locking or unlocking the outer arm section 202, thereby improving the locking stability and reliability. The telescopic arm locking device improves the smoothness of the extension and retraction of the arm pin 10 by cooperating with the receiving groove 31 through the limiting ball 20, preventing the arm pin 10 from being stuck during extension and retraction, and by setting the reset drive component 50, the insertion and removal rod 30 can be automatically reset, thereby allowing the limiting ball 20 to limit the arm pin 10, preventing the arm pin 10 from not being extended or retracted in place, and improving the stability, safety and reliability of locking or unlocking.

[0026] In this embodiment of the invention, the insertion rod 30 is provided with a set of receiving slots, which includes two receiving slots 31 spaced apart along the length of the insertion rod 30. The two receiving slots 31 are respectively designated as a first receiving slot 31a and a second receiving slot 31b, and a limiting abutment platform 32 is formed between the first receiving slot 31a and the second receiving slot 31b. The first receiving slot 31a and the second receiving slot 31b are respectively used for the limiting ball 20 to fall into. The reset drive assembly 50 is used to drive the insertion rod 30 to reset so that the limiting abutment platform 32 abuts against the limiting ball 20.

[0027] like Figure 1 As shown, the arm pin 10 is positioned to lock the outer arm segment 202. The limiting abutment platform 32 on the insertion / removal rod 30 abuts against the limiting ball 20, causing the limiting ball 20 to extend beyond the mounting hole 11. The limiting ball 20 is located between the inner arm segment 201 and the outer arm segment 202 to restrict the extension and retraction of the arm pin 10, thereby limiting the arm pin 10 to the position of locking the outer arm segment 202, ensuring stable and reliable locking. Figure 2 As shown, when the outer boom section 202 needs to be unlocked, the telescopic drive assembly 40 drives the insertion rod 30 to retract, so that the first receiving groove 31a communicates with the mounting hole 11. The limiting ball 20 falls into the first receiving groove 31a to release the telescopic restriction on the boom pin 10. The side of the limiting ball 20 facing away from the first receiving groove 31a rolls with the inner boom section 201 to reduce friction and improve the smoothness of the boom pin 10's telescopic movement, effectively preventing the boom pin 10 from getting stuck. Figure 3 As shown, when the arm pin 10 retracts to unlock the outer arm section 202, the reset drive assembly 50 drives the insertion rod 30 to reset, so that the limiting abutment platform 32 corresponds to the mounting hole 11 and abuts against the limiting ball 20. The limiting ball 20 extends out of the mounting hole 11 and abuts against the inner side of the inner arm section 201, thereby restricting the extension of the arm pin 10 and limiting the arm pin 10 to the position where the outer arm section 202 is unlocked, making unlocking stable and reliable; Figure 4 As shown, when the outer boom section 202 needs to be locked, the telescopic drive assembly 40 drives the insertion rod 30 to extend, so that the second receiving groove 31b aligns with the mounting hole 11. The limiting ball 20 falls into the second receiving groove 31b to release the telescopic restriction on the boom pin 10. The side of the limiting ball 20 facing away from the second receiving groove 31b rolls with the inner boom section 201 to reduce friction and improve the smoothness of the boom pin 10's telescopic movement, effectively preventing the boom pin 10 from jamming during telescopic movement. It can be understood that, as Figure 1 As shown, when the arm pin 10 extends into position to lock the outer arm section 202, the reset drive assembly 50 drives the insertion rod 30 to reset, so that the limiting abutment platform 32 corresponds to the mounting hole 11 and abuts against the limiting ball 20. The limiting ball 20 extends out of the mounting hole 11 and abuts against the outer side of the inner arm section 201, thereby restricting the extension and retraction of the arm pin 10 and limiting the arm pin 10 to the position of locking the outer arm section 202. The telescopic arm locking device realizes the retraction, extension and restriction of the arm pin 10 and the extension and retraction of the arm pin 10 by cooperating with the limiting ball 20 through the first receiving groove 31a, the second receiving groove 31b and the limiting abutment platform 32 respectively, thereby improving the smoothness of the extension and retraction of the arm pin 10 and improving the locking stability and reliability.

[0028] In embodiments of the present invention, such as Figures 1 to 4 and Figure 6 As shown, the number of receiving slot groups is set to multiple, and the multiple receiving slot groups are arranged circumferentially along the outer periphery of the insertion and extraction rod 30. Each receiving slot group includes a first receiving slot 31a and a second receiving slot 31b located below the first receiving slot 31a. The number of limiting balls 20 is consistent with the number of receiving slot groups and is arranged one-to-one. The multiple limiting balls 20 can all play the role of guiding the extension and retraction of the arm pin 10 and restricting the extension and retraction of the arm pin 10, which further improves the smoothness of the extension and retraction of the arm pin 10 and the stability of the limiting.

[0029] In this embodiment of the invention, the reset drive assembly 50 includes a first spring 51 and a second spring 52. The first spring 51 and the second spring 52 are both sleeved on the insertion rod 30. The mounting groove 13 has a first pressing groove wall 131 and a second pressing groove wall 132 that are arranged opposite to each other. The insertion rod 30 is provided with a pressing boss 33. The two ends of the first spring 51 respectively abut against the first pressing groove wall 131 and the pressing boss 33. The two ends of the second spring 52 respectively abut against the second pressing groove wall 132 and the pressing boss 33.

[0030] like Figure 6 As shown, the lower side of the mounting groove 13 has a first pressing groove wall 131, and the upper side of the mounting groove 13 has a second pressing groove wall 132. The outer periphery of the insertion / removal rod 30 is provided with a pressing boss 33. A first spring 51 is sleeved on the insertion / removal rod 30 and located below the pressing boss 33. The end of the first spring 51 away from the pressing boss 33 abuts against the first pressing groove wall 131. A second spring 52 is sleeved on the insertion / removal rod 30 and located above the pressing boss 33. The end of the second spring 52 away from the pressing boss 33 abuts against the second pressing groove wall 132. Figure 2 As shown, when the outer boom section 202 needs to be unlocked, the limiting ball 20 falls into the first receiving groove 31a, the insertion / removal rod 30 drives the boom pin 10 to retract, and the pushing boss 33 cooperates with the first pushing groove wall 131 to compress the first spring 51; as Figure 3 As shown, when the arm pin 10 retracts to unlock the outer arm section 202, the elastic restoring force of the first spring 51 acts on the pushing boss 33 to push the insertion rod 30 out and reset, so that the limiting abutment platform 32 abuts against the limiting ball 20, thereby reliably limiting the extension and retraction of the arm pin 10; as Figure 4 As shown, when the outer arm section 202 needs to be locked, the limiting ball 20 falls into the second receiving groove 31b, the insertion rod 30 drives the arm pin 10 to extend, and the pushing boss 33 cooperates with the second pushing groove wall 132 to compress the second spring 52; as Figure 1 As shown, when the arm pin 10 is extended to lock the outer arm section 202, the elastic restoring force of the second spring 52 acts on the pushing boss 33 to push the insertion rod 30 back to its original position, so that the limiting abutment platform 32 abuts against the limiting ball 20, thereby reliably limiting the extension and retraction of the arm pin 10. The telescopic arm locking device compresses the first spring 51 by the cooperation of the pushing boss 33 and the first pushing groove wall 131, so that the first spring 51 drives the insertion rod 30 to reset, and compresses the second spring 52 by the cooperation of the first boss and the second pushing groove wall 132, so that the second spring 52 drives the insertion rod 30 to reset. The insertion rod 30 resets and extends and retracts smoothly and stably, which improves the reliability of the limiting ball 20 in limiting the extension and retraction of the arm pin 10, effectively prevents the arm pin 10 from moving in the locked or unlocked position, and further improves the stability.

[0031] Those skilled in the art will understand that the reset drive assembly 50 of this application is not limited to the above-mentioned structure including the first spring 51 and the second spring 52. It can also be other elastic elements such as gas springs and elastic bushings, or reset drive components such as cylinders and electric cylinders that are driven and connected to the insertion rod 30. Any structure that can drive the insertion rod 30 to reset should also fall within the protection scope of this application.

[0032] In this embodiment of the invention, the telescopic arm locking device further includes a detection component 60, which includes a piezoelectric sensor 61. The piezoelectric sensor 61 is disposed within the receiving groove 31 and is used to detect the position information of the limiting ball 20. Figures 1 to 4 and Figure 6 As shown, the piezoelectric sensor 61 can be a piezoelectric element such as a piezoelectric ceramic or piezoelectric film that generates an electric charge (positive piezoelectric effect) when subjected to mechanical stress. The piezoelectric sensor 61 is disposed in the receiving groove 31. When the limiting ball 20 falls into the receiving groove 31, it squeezes the piezoelectric sensor 61, causing the piezoelectric sensor 61 to generate a current to determine that the limiting ball 20 has extended into the receiving groove 31. This realizes the detection of the position information of the limiting ball 20. The telescopic arm locking device uses the piezoelectric sensor 61 disposed in the receiving groove 31 to detect the position information of the limiting ball 20, and thus can determine that the limiting ball 20 has fallen into the receiving groove based on the position information of the limiting ball 20. Within 31, it is determined that the limiting ball 20 has released the extension and retraction restriction on the arm pin 10 and that the extension and retraction movement of the arm pin 10 is in a normal state, which further improves the stability and reliability of locking or unlocking the telescopic arm 200. It can be understood that when it is necessary to lock or unlock the outer arm section 202, the insertion rod 30 extends and retracts to the position of the mounting hole 11 in the receiving groove 31. If the piezoelectric sensor 61 does not generate current, it can be determined that the limiting ball 20 has not fallen into the receiving groove 31, and thus it can be determined that the extension and retraction of the arm pin 10 is abnormal. There may be situations such as the arm pin 10 limiting failure or the limiting ball 20 loosening. This makes it easier to judge and control the extension and retraction of the arm pin 10, and further improves the stability and reliability.

[0033] Furthermore, piezoelectric sensors 61 are provided in both the first receiving groove 31a and the second receiving groove 31b. The piezoelectric sensor 61 in the first receiving groove 31a is designated as the first piezoelectric sensor 61a, and the piezoelectric sensor 61 in the second receiving groove 31b is designated as the second piezoelectric sensor 61b. When the limiting ball 20 falls into the first receiving groove 31a, it pushes the first piezoelectric sensor 61a. The first piezoelectric sensor 61a generates a current due to the compression of the limiting ball 20, confirming that the limiting ball 20 has extended into the first receiving groove 31a. The arm pin 10 then retracts normally, allowing the outer arm section 202 to be unlocked. Figure 2As shown; and when the limiting ball 20 falls into the second receiving groove 31b, it pushes the second piezoelectric sensor 61b. The second piezoelectric sensor 61b generates a current due to the compression of the limiting ball 20 to confirm that the limiting ball 20 has extended into the second receiving groove 31b. The arm pin 10 extends normally and can lock the outer arm section 202, as shown. Figure 4 As shown, the telescopic arm locking device uses a first piezoelectric sensor 61a installed in the first receiving groove 31a and a second piezoelectric sensor 61b installed in the second receiving groove 31b to determine whether the retraction action of the arm pin 10 is abnormal and whether the extension action of the arm pin 10 is abnormal, thereby achieving accurate judgment on the extension and retraction of the arm pin 10 and improving the stability and reliability of locking or unlocking the telescopic arm 200.

[0034] In this embodiment of the invention, the telescopic drive assembly 40 includes a telescopic drive member 41 and a lifting seat 42. The telescopic drive member 41 is disposed within the inner boom section 201 and is used to drive the lifting seat 42 to rise and fall. The lifting seat 42 is provided with a transition groove 421, and the insertion / extraction rod 30 is provided with a transition block 34, which is connected to the transition groove 421. Figures 5 to 7 As shown, the telescopic drive member 41 is located inside the inner boom section 201 and is drivenly connected to the lifting seat 42 to drive the lifting seat 42 to rise and fall. The lifting seat 42 has a transition groove 421. The end of the insertion / extraction rod 30 away from the receiving groove 31 has a transition block 34. The transition block 34 extends into the transition groove 421 and abuts against the groove wall of the transition groove 421 to connect the lifting seat 42 and the insertion / extraction rod 30. Specifically, the upper side of the transition groove 421 has a first abutting groove wall 4211, and the lower side of the transition groove 421 has a second abutting groove wall 4212, as shown... Figure 2 As shown, when it is necessary to unlock the outer boom section 202, the telescopic drive 41 drives the lifting seat 42 to descend so that the adapter block 34 abuts against the first abutment groove wall 4211, thereby causing the lifting seat 42 to drive the insertion rod 30 and the boom pin 10 to retract to unlock the outer boom section 202, and as shown Figure 4 As shown, when it is necessary to lock the outer boom section 202, the telescopic drive 41 drives the lifting seat 42 to rise so that the adapter block 34 abuts against the second abutment groove wall 4212, thereby causing the lifting seat 42 to drive the insertion rod 30 and the boom pin 10 to extend and lock the outer boom section 202. This achieves the goal of driving the boom pin 10 to extend and retract by setting the lifting seat 42, and as shown... Figure 5 and Figure 7 As shown, the adapter block 34 will not interfere with the movement of the lifting seat 42 in the length direction of the inner boom section 201, so that the telescopic mechanism of the telescopic boom system can drive the telescopic drive component 40 to move to the position of any inner boom section 201 to lock or unlock multiple outer boom sections 202 in sequence. The structure is reasonably designed and realizes the telescopic drive of the boom pin 10.

[0035] In this embodiment of the invention, the detection component 60 further includes an electrical connection wire 62 and a current sensor 63. The electrical connection wire 62 passes through the plug-in rod 30, one end of the electrical connection wire 62 is electrically connected to the piezoelectric sensor 61, and the other end of the electrical connection wire 62 is set as a current transmission end 621. The current sensor 63 is disposed in the adapter slot 421 and is used to detect the current signal of the current transmission end 621. Figures 1 to 4 and Figure 6 As shown, the electrical connection line 62 is electrically connected to the piezoelectric sensor 61 in the receiving groove 31 and passes through the insertion rod 30 along the length direction of the insertion rod 30. A current sensor 63 is provided in the adapter groove 421. When the limiting ball 20 falls into the receiving groove 31, it pushes the piezoelectric sensor 61. The piezoelectric sensor 61 generates current when pushed. The current is transmitted along the electrical connection line 62 to the current transmission end 621. When the current sensor 63 detects the current signal at the current transmission end 621, it determines that the limiting ball 20 has fallen into the receiving groove 31, and thus determines that the extension and retraction of the arm pin 10 is normal. The current wiring and the setting of the current sensor 63 facilitate the transmission and detection of the current signal, improve the convenience of detecting the position information of the limiting ball 20, and have a reasonable structural design and convenient and quick installation.

[0036] Furthermore, two current sensors 63 are provided in the adapter slot 421. The two current sensors 63 are respectively designated as a first current sensor 63a and a second current sensor 63b. The first current sensor 63a is located on the first abutment slot wall 4211, and the second current sensor 63b is located on the second abutment slot wall 4212. One end of the electrical connection line 62 branches to be electrically connected to the first piezoelectric sensor 61a and the second piezoelectric sensor. The other end of the electrical connection line 62 branches to have two current transmission ends 621. One current transmission end 621 extends to the upper side of the adapter block 34, and the other current transmission end 621 extends to the lower side of the adapter block 34. Figure 2 As shown, when the limiting ball 20 falls into the first receiving groove 31a, it pushes the first piezoelectric sensor 61a, causing the current generated by the first piezoelectric sensor 61a to be transmitted along the electrical connection line 62 to the current transmission end 621 located on the upper side of the adapter block 34. The first current sensor 63a detects the current signal at the current transmission end 621 to determine that the arm pin 10 has retracted normally; Figure 4 As shown, when the limiting ball 20 falls into the second receiving groove 31b, it pushes the second piezoelectric sensor 61b, causing the current generated by the second piezoelectric sensor 61b to be transmitted along the electrical connection line 62 to the current transmission end 621 located on the lower side of the adapter block 34. The second current sensor 63b detects the current signal at the current transmission end 621 to determine that the arm pin 10 is normally extended. The first current sensor 63a and the second current sensor 63b respectively detect the current signals generated by the first piezoelectric sensor 61a and the second piezoelectric sensor 61b to accurately determine the extension and retraction of the arm pin 10, thereby improving the detection accuracy and reliability.

[0037] In this embodiment of the invention, the telescopic drive component 41 is configured as a telescopic cylinder 41a, and the detection component 60 further includes a pressure sensor 64 and a controller 65. The pressure sensor 64 is used to detect the pressure of the telescopic cylinder 41a, and the controller 65 is communicatively connected to the pressure sensor 64 and configured to: determine the working state of the reset drive component 50 based on the pressure of the telescopic cylinder 41a; and control the operating state of the telescopic cylinder 41a based on the working state of the reset drive component 50.

[0038] like Figures 5 to 8 As shown, the telescopic drive component 41 is configured as a telescopic cylinder 41a. The pressure sensor 64 can detect the pressure of the telescopic cylinder 41a. The telescopic cylinder 41a drives the insertion / extraction rod 30 to extend and retract by driving the lifting seat 42 to rise and fall. During the extension and retraction process, the insertion / extraction rod 30 overcomes the reset driving force of the reset drive assembly 50. That is, the pressure of the telescopic cylinder 41a is proportional to the reset driving force of the reset drive assembly 50 on the insertion / extraction rod 30. The pressure sensor 64 transmits the detected pressure of the telescopic cylinder 41a to the controller 65. The controller 65 determines the working state of the reset drive assembly 50 based on the pressure of the telescopic cylinder 41a. The working state of the reset drive assembly 50 is as follows: The states include normal and abnormal states. When the pressure of the telescopic cylinder 41a is proportional to the reset driving force of the reset drive assembly 50, or when the pressure of the telescopic cylinder 41a is within the preset pressure range, the reset drive assembly 50 is determined to be in a normal state. This allows the telescopic cylinder 41a to drive the lifting seat 42 to rise or fall, thereby locking or unlocking the outer boom section 202. Conversely, when the pressure of the telescopic cylinder 41a is outside the preset pressure range, the reset drive assembly 50 is determined to be in an abnormal state. This allows the telescopic cylinder 41a to stop operating, thereby protecting the telescopic boom locking device and further improving stability and reliability.

[0039] Furthermore, such as Figures 1 to 4As shown, the reset drive assembly 50 includes a first spring 51 and a second spring 52. When the arm pin 10 retracts, the insertion / removal rod 30 needs to overcome the elastic restoring force of the first spring 51. The pressure of the telescopic cylinder 41a is proportional to the elastic restoring force of the first spring 51. The controller 65 can determine the working state of the first spring 51 based on the pressure of the telescopic cylinder 41a. When the pressure of the telescopic cylinder 41a is within the preset pressure range, it can be determined that the first spring 51 is in a normal state, and then the controller controls the telescopic cylinder 41a to drive the lifting seat 42 to descend to unlock the outer boom section 202. When the pressure of the telescopic cylinder 41a is outside the preset pressure range, it can be determined that the first spring 51 is stuck or broken, and the controller 65 immediately controls the telescopic cylinder 41a to stop running to reliably protect the telescopic boom. 200 and telescopic boom locking device; understandably, when boom pin 10 extends, the insertion rod 30 needs to overcome the elastic restoring force of the second spring 52. The pressure of telescopic cylinder 41a is proportional to the elastic restoring force of the second spring 52. The controller 65 can determine the working state of the second spring 52 according to the pressure of telescopic cylinder 41a. When the pressure of telescopic cylinder 41a is within the preset pressure range, it can be determined that the second spring 52 is in a normal state, and then control telescopic cylinder 41a to drive lifting seat 42 to rise to lock the outer boom section 202. When the pressure of telescopic cylinder 41a is outside the preset pressure range, it can be determined that the second spring 52 is stuck or broken. The controller 65 immediately controls telescopic cylinder 41a to stop running to reliably protect telescopic boom 200 and telescopic boom locking device.

[0040] In one embodiment of the present invention, the preset pressure range can be set to 2000N~3000N. When the pressure of the telescopic cylinder 41a is within the preset pressure range, it can be determined that the first spring 51 or the second spring 52 is in a normal state, thereby determining that the boom pin 10 extends and retracts normally. When the pressure of the telescopic cylinder 41a is outside the preset pressure range, it can be determined that the first spring 51 or the second spring 52 is in an abnormal state, thereby controlling the telescopic cylinder 41a to stop operating to protect the telescopic boom 200 and the telescopic boom locking device. Those skilled in the art will understand that in other embodiments of the present invention, the preset pressure range is not limited to the above-mentioned setting of 2000N~3000N. The preset pressure range can be flexibly set according to the lifting conditions of the telescopic boom 200 and the lifting conditions of the working machinery to which the telescopic boom 200 belongs. The preset pressure range of 2000N~3000N is only an example, and the telescopic boom locking device of the present invention does not limit the specific value of the preset pressure range.

[0041] Furthermore, those skilled in the art will understand that the telescopic drive component 41 of this application is not limited to the above-described structure of a telescopic hydraulic cylinder 41a. The telescopic drive component 41 can also be a pneumatic cylinder, an electric cylinder, or a motor. The detection component 60 also includes a torque sensor for detecting the torque of the motor.

[0042] In embodiments of the present invention, such as Figure 8 As shown, the controller 65 is communicatively connected to the first current sensor 63a, the second current sensor 63b, and the pressure sensor 64, respectively. The controller 65 is also configured to: The retraction state of the arm pin 10 is determined based on the current signal detected by the first current sensor 63a, and the operating state of the telescopic cylinder 41a is controlled based on the retraction state of the arm pin 10. The extension state of the arm pin 10 is determined based on the current signal detected by the second current sensor 63b, and the operating state of the telescopic cylinder 41a is controlled based on the extension state of the arm pin 10. The working state of the first spring 51 or the second spring 52 is determined according to the pressure of the telescopic cylinder 41a, and the operating state of the telescopic cylinder 41a is controlled according to the working state of the first spring 51 or the second spring 52.

[0043] Specifically, when the outer boom section 202 needs to be unlocked, the limiting ball 20 falls into the first receiving groove 31a and pushes the first piezoelectric sensor 61a. The current generated by the first piezoelectric sensor 61a is transmitted to the current transmission terminal 621 through the electrical connection line 62. The first current sensor 63a detects the current signal at the current transmission terminal 621 to confirm that the limiting ball 20 has fallen into the first receiving groove 31a. The first current sensor 63a transmits the detection result to the controller 65. When the controller 65 confirms that the first current sensor 63a has detected a current signal, it determines that the boom pin 10 retracts normally and then controls the telescopic cylinder 41a to drive the lifting seat 42 to descend to unlock the outer boom section 202. If the device 63a does not detect a current signal, it determines that the arm pin 10 retraction is abnormal and controls the telescopic cylinder 41a to stop operating, thereby achieving reliable protection for the telescopic arm 200 and the telescopic arm locking device. Furthermore, during the retraction process of the insertion rod 30, the pressure sensor 64 detects the pressure of the telescopic cylinder 41a and sends the detection result to the controller 65. The controller 65 determines whether the first spring 51 is in a normal or abnormal state based on the pressure of the telescopic cylinder 41a, so that the arm pin 10 can unlock the outer arm section 202 when the first spring 51 is in a normal state, and the telescopic cylinder 41a can be stopped when the first spring 51 is in an abnormal state, thereby further improving the unlocking stability and reliability.

[0044] It should be noted that in the prior art, the position information of the lifting seat 42 is detected to determine whether the arm pin 10 has been extended or retracted. However, due to assembly errors, gaps between the groove wall of the adapter groove 421 and the adapter block 34, the arm pin 10 may not be extended or retracted when the lifting seat 42 is in the lifting position. This can lead to unstable arm locking, misalignment, inability to extend or retract, and even cause safety hazards such as arm drop or arm pin 10 breakage. The locking stability is poor and the reliability is low. Furthermore, when the inner arm section 201 deflects, the lifting seat 42 will shift relative to the adapter block 34 in the length direction of the inner arm section 201. This can easily cause interference with the insertion rod 30 and lead to collision with the insertion rod 30, resulting in the insertion rod 30 breaking. It is difficult to accurately determine whether the arm pin 10 has been extended or retracted.

[0045] The telescopic arm locking device of this invention, through the cooperation of the limiting ball 20 and the first receiving groove 31a, the detection of the position information of the limiting ball 20 by the first piezoelectric sensor 61a, the detection of the current signal of the first piezoelectric sensor 61a by the first current sensor 63a, and the detection of the pressure of the telescopic cylinder 41a by the pressure sensor 64, realizes the detection and control of the telescopic movement of the arm pin 10 from multiple aspects of mechanical structure, electrical and hydraulics, and thus accurately determines whether the arm pin 10 has been telescopically extended or retracted, which greatly improves the stability, reliability and fault tolerance of unlocking.

[0046] Understandably, when it is necessary to lock the outer boom section 202, the limiting ball 20 falls into the second receiving groove 31b and pushes the second piezoelectric sensor 61b. The current generated by the second piezoelectric sensor 61b is transmitted to the current transmission terminal 621 through the electrical connection line 62. The second current sensor 63b detects the current signal of the current transmission terminal 621 to determine that the limiting ball 20 has fallen into the second receiving groove 31b. The second current sensor 63b transmits the detection result to the controller 65. When the controller 65 determines that the second current sensor 63b has detected a current signal, it determines that the boom pin 10 extends normally and then controls the telescopic cylinder 41a to drive the lifting seat 42 to rise to lock the outer boom section 202. And when it determines that the second current sensor 63b has detected a current signal, it determines that the boom pin 10 extends normally and then controls the telescopic cylinder 41a to drive the lifting seat 42 to rise to lock the outer boom section 202. If sensor 63b does not detect a current signal, it determines that the extension of the arm pin 10 is abnormal and controls the telescopic cylinder 41a to stop operating, thereby achieving reliable protection for the telescopic arm 200 and the telescopic arm locking device. Furthermore, during the extension of the insertion rod 30, pressure sensor 64 detects the pressure of the telescopic cylinder 41a and sends the detection result to controller 65. Controller 65 determines whether the second spring 52 is in a normal or abnormal state based on the pressure of the telescopic cylinder 41a, so that the arm pin 10 locks the outer arm section 202 when the second spring 52 is in a normal state, and controls the telescopic cylinder 41a to stop operating when the second spring 52 is in an abnormal state, thereby further improving the locking stability and reliability. The telescopic arm locking device of this invention, through the cooperation of the limiting ball 20 and the second receiving groove 31b, the detection of the position information of the limiting ball 20 by the second piezoelectric sensor 61b, the detection of the current signal of the second piezoelectric sensor 61b by the second current sensor 63b, and the detection of the pressure of the telescopic cylinder 41a by the pressure sensor 64, realizes the detection and control of the telescopic movement of the arm pin 10 from multiple aspects of mechanical structure, electrical and hydraulics, thereby accurately determining whether the arm pin 10 has been telescopically extended or retracted, which greatly improves the stability, reliability and fault tolerance of unlocking.

[0047] In this embodiment of the invention, the telescopic arm locking device further includes a limiting baffle 70, which is disposed on the inner arm section 201 and has a through hole for the arm pin 10 to pass through. The limiting baffle 70 abuts against the limiting ball 20 when the receiving groove 31 and the mounting hole 11 are misaligned. Figure 1 As shown, when the arm pin 10 is extended to lock the outer arm segment 202, the limiting ball 20 abuts against the upper side of the limiting baffle 70, so that the limiting baffle 70 restricts the extension and retraction of the arm pin 10 through the limiting ball 20, and as... Figure 3As shown, when the arm pin 10 retracts to unlock the outer arm section 202, the limiting ball 20 abuts against the lower side of the limiting baffle 70, so that the limiting baffle 70 restricts the extension of the arm pin 10 through the limiting ball 20. This achieves the restriction of the extension and retraction of the arm pin 10 by the abutment between the limiting baffle 70 and the limiting ball 20, thereby stably limiting the arm pin 10 to the position of locking or unlocking the outer arm section 202. This improves the limiting stability and reliability of the arm pin 10, and the limiting baffle 70 is easy to replace, improving the convenience of inspection and maintenance.

[0048] Furthermore, such as Figure 1 and Figure 6 As shown, the arm pin 10 is provided with a stop protrusion 14. The stop protrusion 14 is used to abut against the limiting baffle 70 to limit the extension of the arm pin 10. When the arm pin 10 is extended into place to lock the outer arm segment 202, the limiting ball 20 abuts against the upper side of the limiting baffle 70, and the stop protrusion 14 abuts against the lower side of the limiting baffle 70, which further improves the limiting reliability and stability of the arm pin 10.

[0049] Furthermore, the present invention also provides a working machine, which includes a telescopic boom system. The telescopic boom system includes a telescopic boom locking device as described above. Specifically, the working machine can be a truck crane, a wheeled crane, or other working machine with a telescopic boom 200. The telescopic boom system includes a telescopic boom 200 and a telescopic boom locking device. The specific structure of the telescopic boom locking device is as described in the above embodiments. Since the working machine and the telescopic boom system adopt all the technical solutions of the above embodiments, they at least have all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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 telescopic arm locking device, characterized in that, The telescopic arm locking device includes: Arm pin (10), the arm pin (10) is telescopically disposed on the inner arm section (201) of the telescopic arm (200) and used to lock the outer arm section (202) of the telescopic arm (200), and the arm pin (10) is provided with mounting hole (11); The insertion and removal mechanism includes a limiting ball (20), an insertion and removal rod (30), and a telescopic drive assembly (40). The limiting ball (20) is disposed in the mounting hole (11). The insertion and removal rod (30) is telescopically passed through the arm pin (10) and has a receiving groove (31). The telescopic drive assembly (40) is used to drive the insertion and removal rod (30) to extend and retract. When the receiving groove (31) is aligned with the mounting hole (11), the limiting ball (20) falls into the receiving groove (31) so that the insertion and removal rod (30) can drive the arm pin (10) to extend and retract through the limiting ball (20). When the receiving groove (31) is misaligned with the mounting hole (11), the limiting ball (20) abuts against the insertion and removal rod (30) so that the limiting ball (20) extends out of the mounting hole (11) and restricts the extension and retraction of the arm pin (10). The arm pin (10) has a mounting cavity (12) through which the insertion rod (30) passes. The mounting hole (11) communicates with the mounting cavity (12). The cavity wall of the mounting cavity (12) has a mounting groove (13). The insertion and removal mechanism also includes a reset drive assembly (50). The reset drive assembly (50) is located in the mounting groove (13). The reset drive assembly (50) is used to drive the insertion rod (30) to reset and abut against the limiting ball (20). The insertion rod (30) is provided with a set of receiving slots, which includes two receiving slots (31) spaced apart along the length of the insertion rod (30). The two receiving slots (31) are respectively designated as a first receiving slot (31a) and a second receiving slot (31b). A limiting abutment platform (32) is formed between the first receiving slot (31a) and the second receiving slot (31b). The first receiving slot (31a) and the second receiving slot (31b) are respectively used for the limiting ball (20) to fall into. The reset drive assembly (50) is used to drive the insertion rod (30) to reset so that the limiting abutment platform (32) abuts against the limiting ball (20).

2. The telescopic arm locking device according to claim 1, characterized in that, The reset drive assembly (50) includes a first spring (51) and a second spring (52). The first spring (51) and the second spring (52) are both sleeved on the insertion rod (30). The mounting groove (13) has a first pressing groove wall (131) and a second pressing groove wall (132) arranged opposite to each other. The insertion rod (30) is provided with a pressing boss (33). The two ends of the first spring (51) abut against the first pressing groove wall (131) and the pressing boss (33) respectively. The two ends of the second spring (52) abut against the second pressing groove wall (132) and the pressing boss (33) respectively.

3. The telescopic arm locking device according to claim 1, characterized in that, The telescopic arm locking device further includes a detection component (60), which includes a piezoelectric sensor (61). The piezoelectric sensor (61) is located in the receiving groove (31) and is used to detect the position information of the limiting ball (20).

4. The telescopic arm locking device according to claim 3, characterized in that, The telescopic drive assembly (40) includes a telescopic drive component (41) and a lifting seat (42). The telescopic drive component (41) is located inside the inner boom section (201) and is used to drive the lifting seat (42) to rise and fall. The lifting seat (42) is provided with a transition groove (421). The plug-in rod (30) is provided with a transition block (34). The transition block (34) is connected to the transition groove (421).

5. The telescopic arm locking device according to claim 4, characterized in that, The detection component (60) further includes an electrical connection wire (62) and a current sensor (63). The electrical connection wire (62) passes through the plug-in rod (30). One end of the electrical connection wire (62) is electrically connected to the piezoelectric sensor (61), and the other end of the electrical connection wire (62) is set as a current transmission end (621). The current sensor (63) is located in the adapter slot (421) and is used to detect the current signal of the current transmission end (621).

6. The telescopic arm locking device according to claim 4, characterized in that, The telescopic drive component (41) is configured as a telescopic cylinder (41a). The detection component (60) further includes a pressure sensor (64) and a controller (65). The pressure sensor (64) is used to detect the pressure of the telescopic cylinder (41a). The controller (65) is communicatively connected to the pressure sensor (64) and configured to: determine the working state of the reset drive component (50) based on the pressure of the telescopic cylinder (41a); and control the operating state of the telescopic cylinder (41a) based on the working state of the reset drive component (50).

7. The telescopic arm locking device according to any one of claims 1 to 6, characterized in that, The telescopic arm locking device further includes a limiting baffle (70), which is provided on the inner arm section (201) and has a through hole for the arm pin (10) to pass through. The limiting baffle (70) abuts against the limiting ball (20) when the receiving groove (31) and the mounting hole (11) are misaligned.

8. A type of operating machinery, characterized in that, The operating machinery includes a telescopic boom system, and the telescopic boom system includes a telescopic boom locking device according to any one of claims 1 to 7.

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