Telescopic boom in-position detection device, telescopic boom assembly and working machine

Abstract

A telescopic boom in-position detection device, a telescopic boom assembly, and a working machine. The telescopic boom in-position detection device comprises: a first mounting base (1), a second mounting base (2), an ejector rod (3), a first elastic member (4), a second elastic member (5), and a sensing mechanism; the first mounting base (1) is arranged at one end of a second boom section assembly, and the second mounting base (2) is arranged at one end of a first boom section assembly; the ejector rod (3) is driven by the first boom section assembly and the second boom section assembly to move; the ejector rod (3) is movably connected to the first mounting base (1) by means of the first elastic member (4), and the ejector rod (3) is movably connected to the second mounting base (2) by means of the second elastic member (5); the sensing mechanism is arranged on the second mounting base (2). The telescopic boom in-position detection device has a simple structure, can complete the retraction monitoring of the telescopic boom by simply providing one sensing mechanism, eliminates the need for arranging signal lines, and can determine, only on the basis of whether the sensing mechanism has triggered a signal, whether the two boom section assemblies have retracted into position, thereby helping to achieve the lightweight and compact design of telescopic booms.

Description

Telescopic boom position detection device, telescopic boom assembly and working machine

[0001] The present application claims priority to the Chinese patent application No. 202410836615.1, filed on June 26, 2024, entitled "Telescopic boom position detection device, telescopic boom assembly and working machine", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of telescopic boom detection devices, in particular to a telescopic boom position detection device, a telescopic boom assembly and a working machine. BACKGROUND

[0003] Currently, telescopic boom assemblies are widely used in working machines, such as cranes, aerial work platforms or fire trucks. In general, a single oil cylinder is used to drive the adjacent two telescopic booms in the telescopic boom assembly, and the remaining sections of the boom are synchronously telescoped through a steel wire rope, a pulley set or a plate chain and a sheave assembly. Therefore, the telescopic boom retraction detection only needs to detect the retraction of the oil cylinder to the position, and the detection method is simple and reliable. However, for the telescopic boom driven by double oil cylinders, an additional position switch is needed according to the above-mentioned single oil cylinder structure, and an additional signal line is needed to transmit the position signal, which makes the control wire harness arrangement relatively complex, resulting in a complex overall structure of the position detection device. SUMMARY

[0004] The present application aims to provide a telescopic boom position detection device, a telescopic boom assembly and a working machine to solve the problem of complex structure of the position detection device used in the telescopic boom driven by double oil cylinders in the related art.

[0005] In a first aspect, the present application provides a telescopic boom position detection device, the telescopic boom comprising a first section of the boom assembly and a second section of the boom assembly, the first section of the boom assembly and the second section of the boom assembly are both double-oil-cylinder telescopic booms, and the telescopic boom position detection device comprises:

[0006] A first mounting seat is arranged at one end of the second section of the boom assembly;

[0007] A second mounting seat is arranged at one end of the first section of the boom assembly;

[0008] A top rod is movably arranged through the first mounting seat, and the top rod is capable of contacting and moving with the first section of the boom assembly and the second section of the boom assembly;

[0009] A first elastic member movably connects the top rod and the first mounting seat.

[0010] A second elastic member movably connects the top rod and the second mounting base.

[0011] An induction mechanism is arranged on the second mounting base. If the top rod moves to within an induction distance of the induction mechanism, the induction mechanism is triggered to induce an action.

[0012] The telescopic boom positioning detection device provided by the present application comprises at least a first arm assembly, a second arm assembly, and a third arm assembly. The second arm assembly comprises at least the third arm assembly, a fourth arm assembly, and a fifth arm assembly. One end of the top rod extends towards the first arm assembly. The other end of the top rod extends through the third arm assembly and towards the fourth arm assembly.

[0013] When the second arm assembly is in a retracted state, one end of the top rod is configured to be in contact with the fourth arm assembly, and the first elastic member is in a compressed state.

[0014] When the first arm assembly and the second arm assembly are both in a retracted state, one end of the top rod is configured to be in contact with the fourth arm assembly, and the first elastic member and the second elastic member are both in a compressed state. When the top rod moves to within an induction distance of the induction mechanism, the induction mechanism is triggered to induce an action.

[0015] The telescopic boom positioning detection device further comprises a first limiting member fixed on the top rod and adapted to be clamped with one side of the first mounting base to limit the movement of the top rod in a first direction.

[0016] The telescopic boom positioning detection device further comprises a second limiting member fixed on the top rod and adapted to be clamped with the other side of the first mounting base to limit the movement of the top rod in a second direction.

[0017] The telescopic boom positioning detection device further comprises a push connection member. One end of the push connection member is arranged between the top rod and the second elastic member. The other end of the push connection member extends towards the induction mechanism.

[0018] The push connection member comprises a top disc and a screw rod. The top disc is fixed on one end of the top rod and connected with the second elastic member. The head of the screw rod is in contact with the top disc. The rod of the screw rod extends through the second elastic member and towards the induction mechanism.

[0019] According to the telescopic boom in-place detection device provided in the application, the sensing mechanism comprises a sensing element and a limit switch or a proximity switch. The sensing element is arranged at one end of the top rod; the limit switch or the proximity switch is arranged on the second mounting seat, and if the sensing element moves to within the sensing distance of the limit switch or the proximity switch, the sensing action of the limit switch or the proximity switch is triggered.

[0020] The application further provides a telescopic boom assembly, which is a double-oil-cylinder telescopic boom, and the telescopic boom assembly comprises the telescopic boom in-place detection device in the above-mentioned embodiments of the application.

[0021] The application further provides a working machine, which comprises the telescopic boom in-place detection device or the telescopic boom assembly in the above-mentioned embodiments of the application.

[0022] The telescopic boom in-place detection device provided in the application is arranged between adjacent first arm assembly and second arm assembly each having multiple arms, and comprises a first mounting seat, a second mounting seat, a top rod, a first elastic member, a second elastic member and a sensing mechanism. The first mounting seat is arranged at one end of the second arm assembly; the second mounting seat is arranged at one end of the first arm assembly; the top rod is movably arranged through the first mounting seat, and can be in contact with the first arm assembly and the second arm assembly and be driven to move by the first arm assembly and the second arm assembly; the top rod is movably connected with the first mounting seat through the first elastic member; the top rod is movably connected with the second mounting seat through the second elastic member; and the sensing mechanism is arranged on the second mounting seat, and if the top rod moves to within the sensing distance of the sensing mechanism, the sensing action of the sensing mechanism is triggered. The telescopic boom in-place detection device provided in the application has a simple structure, only one sensing mechanism is arranged, the monitoring of the retraction of the two arm assemblies to the position can be completed, and no additional signal line is needed, so that the control wire harness arrangement is simple, and whether the arm assemblies are retracted to the position can be determined only according to whether the sensing mechanism triggers a signal, which is conducive to the lightweight and small-sized design of the telescopic boom.

[0023] Further, the telescopic boom assembly provided in the application has the same advantages as above because it comprises the telescopic boom in-place detection device in the above-mentioned embodiments of the application.

[0024] Further, the working machine provided in the application has the same advantages as above because it comprises the telescopic boom in-place detection device or the telescopic boom assembly in the above-mentioned embodiments of the application. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0026] Fig. 1 is a structural schematic diagram of a telescopic boom positioning detection device provided in an embodiment of the application.

[0027] Fig. 2 is a structural schematic diagram of a jacking rod, a first elastic member, a pressing plate, a first limiting member, a second limiting member and a top disc provided in an embodiment of the application.

[0028] Fig. 3 is a top view of Fig. 2.

[0029] Fig. 4 is a partial structural schematic diagram of A in Fig. 1.

[0030] Reference signs: 1: first mounting seat; 2: second mounting seat; 3: jacking rod; 4: first elastic member; 5: second elastic member; 6: limiting switch; 7: inductive element; 8: pressing plate; 9: first limiting member; 10: second limiting member; 11: top disc; 12: screw rod; 13: first section arm; 14: second section arm; 15: third section arm; 16: fourth section arm; 17: fifth section arm. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the application clearer, the technical solutions in the application will be described clearly and completely in the following with reference to the drawings in the application. Obviously, the described embodiments are some embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the application.

[0032] In the description of the embodiments of the application, it should be noted that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application. In addition, the terms “first”, “second”, “third” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "connected", "connected to", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] In the embodiments of the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0035] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0036] A telescopic boom positioning detection device of the present application is described below in conjunction with FIGS. 1-4. The telescopic boom to which the telescopic boom positioning detection device is applied comprises a first arm assembly and a second arm assembly, both of which are double-oil-cylinder telescopic booms, and both of which are multi-arm structures. In the following embodiments, a three-arm arm assembly is taken as an example for description, and the arms extending out from the truck part in turn are a first arm 13, a second arm 14, and a third arm 15 in the first arm assembly, and a third arm 15, a fourth arm 16, and a fifth arm 17 in the second arm assembly. As shown in FIG. 1 and FIG. 2, the first arm 13, the second arm 14, the third arm 15, the fourth arm 16, and the fifth arm 17 are marked.

[0037] The telescopic boom in-place detection device comprises a first mounting seat 1, a second mounting seat 2, a top rod 3, a first elastic member 4, a second elastic member 5 and a sensing mechanism. Specifically, the first mounting seat 1 can be a cylinder piston rod mounting seat fixed on the third section arm 15 as mentioned above, and the second mounting seat 2 can be fixed on the boom of the first section arm 13.

[0038] The first mounting seat 1 is arranged at one end of the second section arm assembly, the second mounting seat 2 is arranged at one end of the first section arm assembly, the top rod 3 is movably arranged through the first mounting seat 1, the top rod 3 can be in contact with the first section arm assembly and the second section arm assembly respectively and is driven to move by the first section arm assembly and the second section arm assembly, the top rod 3 is movably connected with the first mounting seat 1 through the first elastic member 4, the top rod 3 is movably connected with the second mounting seat 2 through the second elastic member 5, and the sensing mechanism is arranged on the second mounting seat 2, and if the top rod 3 moves to the sensing distance of the sensing mechanism, the sensing mechanism is triggered to sense.

[0039] Specifically, after the third section arm 15, the fourth section arm 16 and the fifth section arm 17 are retracted to the position, the fourth section arm 16 abuts against the right end of the top rod 3, drives the top rod 3 to move to the right, and the first elastic member 4 is compressed; at the same time, after the first section arm 13, the second section arm 14 and the third section arm 15 are retracted to the position, the fourth section arm 16 abuts against the right end of the top rod 3, thus drives the top rod 3 to continue to move to the right as a whole

[0040] The working state of the telescopic boom in-place detection device in the telescoping process of each section arm assembly is as follows: the top rod 3 is configured to move towards the direction of the sensing mechanism when the first section arm assembly and the second section arm assembly are in the retracted state, and the first elastic member 4 and the second elastic member 5 are in the compressed state, the top rod 3 moves to the sensing distance of the sensing mechanism, triggers the sensing action of the sensing mechanism, represents that the two section arm assemblies are retracted to the position, and the top rod 3 is configured to reset under the action of the first elastic member 4 and / or the second elastic member 5 when the first section arm assembly and / or the second section arm assembly is in the extended state, the top rod 3 is away from the sensing mechanism, and after exceeding the sensing distance, the sensing mechanism does not act, representing that at least one of the two section arm assemblies is not retracted to the position.

[0041] It should be understood that for different sizes and models of telescopic jib, the first elastic member 4, the second elastic member 5, the top rod 3 and the sensing mechanism need to be designed correspondingly before assembly, including but not limited to the telescopic length of the elastic member and the sensing distance of the sensing mechanism, and the design requirements need to ensure that the sensing mechanism does not act when the top rod 3 is reset under the elastic force of the first elastic member 4 and the second elastic member 5, and also need to ensure that the sensing mechanism only acts when the first arm assembly and the second arm assembly are both retracted to the position. The sensing mechanism exemplified above adopts the form of a proximity switch, and of course a limit switch can also be used. When the first arm assembly and the second arm assembly are both retracted to the position, the sensing mechanism is contacted and senses the action; otherwise, the sensing mechanism does not act.

[0042] Specifically, the first mounting seat 1 has a through hole for the top rod 3 to pass through and be movable, and the end face of the first mounting seat 1 provides mounting support for the first elastic member 4. After the third arm 15, the fourth arm 16 and the fifth arm 17 are retracted to the position, the top rod 3 is moved to force the first elastic member 4 to be in a compressed state. If the first arm 13, the second arm 14 and the third arm 15 are not retracted to the position at this time, the fourth arm 16 cannot drive the top rod 3 to continue to move to the sensing distance of the sensing mechanism, and the sensing mechanism does not act. Only when the first arm 13, the second arm 14 and the third arm 15 are also retracted to the position, the top rod 3 continues to move to the right under the driving of the fourth arm 16, forcing the second elastic member 5 to be in a compressed state. At this time, the top rod moves to the sensing distance of the sensing mechanism, triggering the sensing action of the sensing mechanism. Similarly, if the first arm 13, the second arm 14 and the third arm 15 are retracted to the position, but the third arm 15, the fourth arm 16 and the fifth arm 17 are not retracted to the position, the sensing mechanism cannot be triggered to sense the action.

[0043] It can be seen that in the telescopic jib position detection device in the embodiment of the application, during the retraction process of the two arm assemblies, the fourth arm 16 in the second arm assembly contacts the top rod 3 to move it to the right. The distance of the movement of the top rod 3 is configured to trigger a signal only when both the two arm assemblies are retracted to the position, that is, when the first elastic member 4 and the second elastic member 5 are both in the corresponding compressed state. Conversely, if any one of the arm assemblies is not retracted to the position, the sensing mechanism cannot be triggered to sense the action.

[0044] The telescopic boom positioning detection device provided by the application is arranged between the adjacent first arm assembly and second arm assembly which both have multiple arms, and comprises a first mounting seat 1, a second mounting seat 2, a top rod 3, a first elastic member 4, a second elastic member 5 and a sensing mechanism. The first mounting seat 1 is arranged at one end of the second arm assembly. The second mounting seat 2 is arranged at one end of the first arm assembly. The top rod 3 is movably arranged through the first mounting seat 1, and can be in contact with the first arm assembly and the second arm assembly and be driven to move by the first arm assembly and the second arm assembly. The top rod 3 is movably connected with the first mounting seat 1 through the first elastic member 4. The top rod 3 is movably connected with the second mounting seat 2 through the second elastic member 5. The sensing mechanism is arranged on the second mounting seat 2, and the top rod 3 moves to the sensing distance of the sensing mechanism, and the sensing mechanism is actuated. The telescopic boom positioning detection device provided by the application has a simple structure, only one sensing mechanism is arranged, the retraction of the two arm assemblies to the position can be monitored, and no additional signal line is arranged, so that the control wire harness is arranged simply, and whether the arm assemblies are retracted to the position is determined according to whether the sensing mechanism triggers a signal, which is beneficial to the lightweight and small-sized design of the telescopic boom.

[0045] In one of the embodiments of the application, the first arm assembly at least comprises a first arm 13, a second arm 14 and a third arm 15 which are connected in a telescopic manner, and the second arm assembly at least comprises a third arm 15, a fourth arm 16 and a fifth arm 17. One end of the top rod 3 extends towards the first arm 13, and the other end of the top rod 3 extends towards the fourth arm 16 through the third arm 15. As shown in FIG. 1 and FIG. 2, in this embodiment, the top rod 3 extends through the oil cylinder where the third arm is arranged, and one end of the top rod 3 extends towards the first arm 13, and the other end of the top rod 3 extends towards the fourth arm 16. When the third arm 15, the fourth arm 16 and the fifth arm 17 are retracted to the position, the fourth arm 16 is in contact with one end of the top rod 3 and drives the top rod 3 to move to the right. When the first arm 13, the second arm 14 and the third arm 15 are retracted to the position, the fourth arm 16 is in contact with the top rod 3 and drives the top rod 3 to continue to move to the right, and the sensing mechanism is triggered to actuate.

[0046] In one of the embodiments of the present application, when the second arm assembly is in the retracted state, one end of the top rod 3 is configured to contact the fourth arm 16 and make the first elastic member 4 in the compressed state. Specifically, the first mounting seat 1 has a through hole, one end of the top rod 3 passes through the through hole, and one end of the top rod 3 extends towards the fourth arm 16 and is adapted to contact the fourth arm 16. Specifically, as shown in FIGS. 1 to 3, one end of the top rod 3 extends towards the tail end of the fourth arm 16, and when the fourth arm is retracted in place, it drives the top rod 3 to move to the right, at this time, the first elastic member 4 is in the compressed state, but does not move to the sensing area of the sensing mechanism, therefore, the sensing mechanism does not act temporarily, only when the second arm 14 is retracted in place at the same time to drive the top rod 3 to continue to move to the right, and moves to the sensing area of the sensing mechanism, the sensing mechanism acts. In this embodiment, the movement of the top rod 3 is driven by the power generated by the retraction of the fourth arm 16 and the setting of the activity of the top rod 3, and the first elastic member 4 is compressed, and only the power inside the telescopic arm support is used to realize the movement of the top rod 3, and after the arm is extended, the automatic reset is realized by the elastic member, so as to ensure that the sensing mechanism is in the normally open state, that is, the non-triggering signal state.

[0047] In one of the embodiments of the present application, when the first arm assembly and the second arm assembly are in the retracted state, one end of the top rod 3 is configured to contact the fourth arm 16 and make the first elastic member 4 and the second elastic member 5 in the compressed state, and the top rod 3 moves to the sensing distance of the sensing mechanism to trigger the sensing action of the sensing mechanism. In this embodiment, the top rod 3 is configured to move to the sensing distance of the sensing mechanism to trigger the sensing action of the sensing mechanism only when the first arm assembly and the second arm assembly are in the retracted state, at this time, the first elastic member 4 and the second elastic member 5 are in the compressed state; when the corresponding arm assembly is extended, the automatic reset of the top rod 3 is realized by the corresponding elastic member.

[0048] In one of the embodiments of the present application, the telescopic arm support in place detection device further comprises: a first limiting member 9 fixed on the top rod 3 and adapted to be clamped with one side of the through hole of the first mounting seat 1 to limit the movement of the top rod 3 in the first direction. In this embodiment, the first limiting member 9 is located on one side of the first mounting seat 1, and its size is larger than the through hole of the first mounting seat 1, when the top rod 3 moves in place towards the sensing mechanism, the first limiting member 9 is clamped at the through hole to limit the movement of the top rod 3, avoiding the problem of excessive movement of the top rod 3, leading to damage and sensing failure of the sensing mechanism. Specifically, the first limiting member 9 can be a clamping ring structure.

[0049] In one of the embodiments of the present application, the telescopic arm in-place detection device further comprises a second limiting member 10 fixed on the top rod 3 and adapted to be in clamping cooperation with the other side of the through hole of the first mounting seat 1 to limit the movement of the top rod 3 in the second direction. In this embodiment, the top rod 3 may move axially in the reset state under the action of the first elastic member 4 and the second elastic member 5, in order to avoid this phenomenon, the second limiting member 10 located on the other side of the first mounting seat 1 has a size larger than the through hole of the first mounting seat 1, thereby limiting the movement of the top rod 3. Specifically, the second limiting member 10 can be a limiting sleeve structure. Based on the first limiting member 9 and the second limiting member 10 in the above embodiment, the movement of the top rod in two different directions is limited in different stages, which ensures the reliable operation of the device.

[0050] In one of the embodiments of the present application, the telescopic arm in-place detection device further comprises a pressing plate 8 located at the end of the second limiting member 10 away from the first mounting seat 1 and fixedly connected with the top rod 3, which serves to strengthen the fixing effect between the second limiting member 10 and the top rod 3, and avoid the sliding of the second limiting member 10 due to the clamping cooperation between the second limiting member 10 and the through hole of the first mounting seat 1 after the top rod 3 is reset under the action of the elastic member, thereby ensuring the normal limiting effect.

[0051] In one of the embodiments of the present application, the telescopic arm in-place detection device further comprises a top pushing connecting member, one end of which is arranged between the top rod 3 and the second elastic member 5, and the other end of which extends towards the sensing mechanism. In this embodiment, the top pushing connecting member is arranged at the end of the top rod 3 to facilitate the sensing of the sensing mechanism, and does not hinder the telescopic movement of the second elastic member 5.

[0052] In one of the embodiments of the present application, the top pushing connecting member comprises a top disc 11 and a screw rod 12, the top disc 11 is fixed on one end of the top rod 3 and connected with the second elastic member 5, the head of the screw rod 12 is in contact with the top disc 11, the rod of the screw rod 12 passes through the second elastic member 5 and extends towards the sensing mechanism. Specifically, the size of the top disc 11 is larger than the outer diameter of the second elastic member 5 and can be in contact with the head of the screw rod 12, the top disc 11 can also be connected with the head of the screw rod 12, and the rod of the screw rod 12 passes through the second elastic member 5, when the top plate extrudes the second elastic member 5 through the top disc 11, the screw rod 12 moves towards the sensing mechanism.

[0053] In one of the embodiments of the present application, the sensing mechanism comprises a sensing element 7 and a limit switch / proximity switch. The sensing element 7 is arranged at one end of the top rod 3 and can be in contact with the limit switch or sensed by the proximity switch. The limit switch or proximity switch is arranged on the second mounting base 2. If the sensing element 7 moves to the sensing distance of the limit switch or proximity switch, the limit switch or proximity switch is triggered to sense. Preferably, as shown in the structure of Figs. 1-4, the limit switch 6 is used in this embodiment. When the sensing element 7 is in contact with the limit switch 6, the limit switch 6 is triggered. When the sensing element 7 is away, the limit switch 6 is not triggered. The preset distance is set according to the form of the sensing mechanism. If a proximity switch is used, the preset distance is the sensing distance. When the sensing element 7 is smaller than the sensing distance, the proximity switch is triggered. If a contact switch is used, the sensing distance is 0, that is, the contact switch is triggered only when the sensing element 7 is in contact with the contact switch.

[0054] In one of the embodiments of the present application, the first elastic member 4 and the second elastic member 5 can be springs or other components with elastic function.

[0055] The present application also provides a telescopic boom assembly, which is a double-oil-cylinder telescopic boom. The telescopic boom assembly comprises the telescopic boom in-place detection device in the above embodiments of the present application. Specifically, the telescopic boom assembly can be a multi-section arm assembly structure having multiple arms.

[0056] The telescopic boom assembly provided by the present application has the same advantages as above because it comprises the telescopic boom in-place detection device in the above embodiments of the present application.

[0057] The present application also provides a working machine, which can be a crane, an aerial working vehicle, a fire engine, or the like. The working machine comprises the telescopic boom in-place detection device or the telescopic boom assembly in the above embodiments of the present application.

[0058] The working machine provided by the present application has the same advantages as above because it comprises the telescopic boom in-place detection device or the telescopic boom assembly in the above embodiments of the present application.

[0059] The device embodiments described above are only schematic, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place or distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment. Those skilled in the art can understand and implement without creative labor.

[0060] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the present application has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A telescopic boom positioning detection device, characterized in that, The telescopic boom includes a first boom assembly and a second boom assembly, both of which are dual-cylinder telescopic booms. The telescopic boom positioning detection device includes: First mounting base (1), the first mounting base (1) is disposed at one end of the second arm assembly; The second mounting base (2) is disposed at one end of the first arm assembly; A push rod (3) is movably passed through the first mounting base (1). The push rod (3) is able to contact the first arm assembly and the second arm assembly respectively, and is driven to move by the first arm assembly and the second arm assembly. The first elastic element (4) is used to movably connect the top rod (3) to the first mounting base (1) via the first elastic element (4); The second elastic element (5) is used to movably connect the top rod (3) to the second mounting base (2). The sensing mechanism is located on the second mounting base (2). If the top rod (3) moves to the sensing distance of the sensing mechanism, the sensing mechanism will be triggered to perform a sensing action.

2. The telescopic boom positioning detection device according to claim 1, characterized in that, The first arm assembly includes at least: a telescopically connected first arm (13), a second arm (14), and a third arm (15), and the second arm assembly includes at least: the third arm (15), the fourth arm (16), and the fifth arm (17); One end of the push rod (3) extends toward the first arm section (13); the other end of the push rod (3) passes through the third arm section (15) and extends toward the fourth arm section (16).

3. The telescopic boom positioning detection device according to claim 2, characterized in that, When the second arm assembly is in the retracted state, one end of the push rod (3) is configured to contact the fourth arm (16), causing the first elastic element (4) to be in a compressed state.

4. The telescopic boom positioning detection device according to claim 3, characterized in that, When both the first and second arm assemblies are in the retracted state, one end of the push rod (3) is configured to contact the fourth arm (16), and both the first elastic element (4) and the second elastic element (5) are in the compressed state. The push rod (3) moves to the sensing distance of the sensing mechanism and triggers the sensing action of the sensing mechanism.

5. The telescopic boom positioning detection device according to claim 1, characterized in that, Also includes: The first limiting member (9) is fixed on the top rod (3) and is adapted to engage with one side of the first mounting base (1) to limit the movement of the top rod (3) in the first direction.

6. The telescopic boom positioning detection device according to claim 5, characterized in that, Also includes: The second limiting member (10) is fixed on the top rod (3) and is adapted to engage with the other side of the first mounting base (1) to limit the movement of the top rod (3) in the second direction.

7. The telescopic boom positioning detection device according to claim 1, characterized in that, Also includes: A push-up connector, one end of which is located between the push rod (3) and the second elastic member (5), and the other end of which extends toward the sensing mechanism.

8. The telescopic boom positioning detection device according to claim 7, characterized in that, The jacking connector includes: Top plate (11), the top plate (11) is fixed to one end of the top rod (3) and connected to the second elastic member (5); The screw (12) has its head in contact with the top plate (11), and its rod passes through the second elastic member (5) and extends toward the sensing mechanism.

9. A telescopic boom assembly, characterized in that, The telescopic boom is a dual-cylinder telescopic boom assembly, which includes: the telescopic boom positioning detection device as described in any one of claims 1 to 8.

10. A type of operating machinery, characterized in that, include: The telescopic boom positioning detection device according to any one of claims 1 to 8 or the telescopic boom assembly according to claim 9.

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