Chains, extension arms and aerial work platforms

Abstract

The application relates to the technical field of aerial work machinery, and discloses a drag chain device, a telescopic arm support and aerial work machinery. The drag chain device comprises a first guide frame, a second guide frame, a first drag chain body and a second drag chain body. The first guide frame is arranged in the fourth telescopic joint arm of the telescopic arm support. The second guide frame is arranged above the first guide frame and is connected with the tail of the second telescopic joint arm of the telescopic arm support. The first drag chain body is connected with the basic arm and the second guide frame. The second drag chain body is connected with the first guide frame and the second guide frame. The first guide frame is provided with a guide groove extending along the length direction of the first guide frame. The slot width size of the guide groove is greater than the width size of the second drag chain body and greater than the groove bottom width size of the guide groove. The arrangement of the guide groove realizes the limiting and guiding of the second drag chain body, prolongs the service life of the drag chain device, reduces the maintenance cost and reduces the safety risk caused by abrasion.

Description

Technical Field

[0001] This application belongs to the field of aerial work platform technology, specifically relating to a cable chain device, a telescopic boom, and aerial work platform machinery. Background Technology

[0002] Vehicle-mounted aerial work platforms are common high-altitude construction equipment in municipal, power, and warehousing industries. As manned work devices, their internal structural stability and operational safety are of paramount importance.

[0003] Currently, the cable chains in this type of equipment are mostly built into the telescopic boom. During the boom extension and retraction process, the cable chains are prone to friction and collision with the internal guide frame used for cable chain guidance. Long-term use can easily lead to wear and even damage to the cable chains, which not only shortens their service life but also increases maintenance costs and safety risks. Utility Model Content

[0004] The purpose of this application is to provide a cable chain device, a telescopic boom, and aerial work machinery to solve the problems of short lifespan, high maintenance costs, and increased safety risks caused by the friction and collision of existing cable chains built into telescopic booms.

[0005] To achieve the above objectives, the first aspect of this application provides a cable chain device for use in a telescopic boom, the telescopic boom including a base boom and multiple telescopic arm sections disposed within the base boom, the multiple telescopic arm sections including a first telescopic arm section, a second telescopic arm section, a third telescopic arm section and a fourth telescopic arm section sequentially mounted from the outside to the inside. The cable chain device includes: The first guide frame is used to be installed inside the fourth telescopic joint arm; The second guide frame is arranged above the first guide frame. One end of the second guide frame is used to connect to the tail of the second telescopic arm, and the other end is used to extend to the head of the second telescopic arm. The first drag chain body has one end set on the basic arm and the other end connected to the end of the second guide frame near the tail of the second telescopic arm. The second drag chain body has one end mounted on the first guide frame and the other end connected to the end of the second guide frame away from the tail of the second telescopic joint arm; The first guide frame has a guide groove on the side facing the second guide frame. The guide groove extends along the length of the first guide frame. The width of the guide groove opening is greater than the width of the second drag chain body, and the width of the guide groove opening is greater than the width of the guide groove bottom.

[0006] As a further improvement to the above technical solution: In some embodiments, the bottom width of the guide groove is clearance-fitted with the width of the second drag chain body; The width of the guide groove gradually decreases from the opening to the bottom.

[0007] In some embodiments, from the opening to the bottom of the guide groove, both sides of the guide groove are provided with a bent portion and a straight plate portion connected in sequence, and the bent portion and the straight plate portion are connected by a smooth transition.

[0008] In some embodiments, the cable chain device further includes a limiting frame disposed on the first guide frame, and a guiding space is provided above the limiting frame away from the first guide frame, through which the second guide frame is arranged.

[0009] In some embodiments, the limiting frame includes two limiting plates arranged in alignment along the width direction of the first guide frame. The two limiting plates are respectively disposed on both sides of the first guide frame, and a support roller shaft for supporting the second guide frame is provided between the two limiting plates. The support roller shaft and the second guide frame are in rolling engagement.

[0010] In some embodiments, the limiting plate has chamfered portions on both sides located along the length of the second guide frame.

[0011] In some embodiments, the end of the second guide frame connected to the second drag chain body is provided with a guide head, and the guide head is provided with a wedge-shaped guide surface on the side near the first guide frame; The wedge-shaped guide surface is smoothly connected to the bottom surface of the second guide frame facing the first guide frame.

[0012] In some embodiments, the width of the guide head gradually decreases from the head end of the guide head towards the second guide frame.

[0013] To achieve the above objectives, a second aspect of this application provides a telescopic boom, including a base boom and a multi-section telescopic boom disposed within the base boom, and a cable chain device according to the first aspect described above.

[0014] To achieve the above objectives, a third aspect of this application provides an aerial work platform, including a telescopic boom provided according to the second aspect above.

[0015] Compared with the prior art, the cable chain device, telescopic boom, and aerial work platform provided in this application have at least the following beneficial effects: In the cable chain device provided in this application, a first guide frame is disposed within the fourth telescopic joint arm, and a second guide frame is disposed on the second telescopic joint arm. The first guide frame and the second guide frame are connected by a second cable chain body, which is in a bent posture between the first and second guide frames. Thus, there is relative movement between the first and second guide frames along the length of the fourth telescopic joint arm, and the second cable chain body achieves a flexible connection between the first and second guide frames, thereby better protecting the pipes and lines installed in the cable chain device. Since the second guide frame is arranged above the first guide frame, during the relative movement of the first and second guide frames, at least a portion of the second cable chain body along the length direction of the first guide frame will be contained in the guide groove of the first guide frame. As the first and second guide frames move relative to each other, the second cable chain body will also move in and out of the guide groove. To this end, this application sets the width of the guide groove opening to be greater than the width of the second cable chain body, and the width of the guide groove opening to be greater than the width of the guide groove bottom, thereby ensuring that the second cable chain body can smoothly enter and exit the guide groove, avoiding direct contact between the second cable chain body and the sharp edge of the first guide frame or the guide groove, which would cause damage. The guide groove setting realizes the lateral limitation of the second cable chain body in its own width direction and the positioning guidance in its own length direction, ensuring that the second cable chain body moves in the guide groove and maintains a stable motion state, thus extending the overall service life of the cable chain device, reducing later maintenance costs, and reducing safety risks caused by wear.

[0016] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a three-dimensional structural diagram of a cable chain device provided in an embodiment of this application; Figure 2 A partial structural diagram of the boom head of a telescopic boom in a retracted state, provided for an embodiment of this application; Figure 3 This is a schematic diagram showing the assembly position relationship between the cable chain device and the telescopic joint arm provided in this application, with the basic arm concealed. Figure 4 for Figure 1 A magnified view of a portion of point A in the middle; Figure 5A partial structural diagram of the first drag chain body in the drag chain device provided in the embodiments of this application; Figure 6 for Figure 1 A magnified view of a portion of point B in the middle; Figure 7 This is a partial structural diagram of the second drag chain body in the drag chain device provided in the embodiments of this application.

[0018] Explanation of reference numerals in the attached figures 100. Cable chain assembly; 110. First guide frame; 111. Guide groove; 1110. Bending section; 1111. Straightening section; 120. Second guide frame; 121. Guide head; 1210. Wedge-shaped guide surface; 130. First cable chain body; 140. Second cable chain body; 150. Limiting frame; 151. Limiting plate; 1510. Chamfered section; 152. Support roller; 160. Bending support plate; 161. Mounting section; 162. Wedge-shaped guide section; 163. Bending support section; 200. Basic Arm; 300, telescopic boom; 310, first telescopic boom; 320, second telescopic boom; 330, third telescopic boom; 340, fourth telescopic boom. Detailed Implementation

[0019] The specific embodiments of this application 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 this application.

[0020] The present application will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0021] Example Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 On one hand, this embodiment provides a cable chain device 100. The cable chain device 100 can be applied to a telescopic boom, and the cable chain device 100 is arranged in a manner that is built into the telescopic boom. The telescopic boom includes a basic boom 200 and a multi-section telescopic boom 300 disposed within the basic boom 200. The multi-section telescopic boom 300 includes a first telescopic boom 310, a second telescopic boom 320, a third telescopic boom 330, and a fourth telescopic boom 340, which are sequentially mounted from the outside to the inside. The first telescopic boom 310, the second telescopic boom 320, the third telescopic boom 330, and the fourth telescopic boom 340 can extend or retract relative to each other.

[0022] The cable chain device 100 provided in this embodiment includes a first guide frame 110, a second guide frame 120, a first cable chain body 130, and a second cable chain body 140. The first guide frame 110 is disposed within the fourth telescopic arm 340; the second guide frame 120 is arranged above the first guide frame 110, with one end of the second guide frame 120 connected to the tail of the second telescopic arm 320 and the other end extending towards the head of the second telescopic arm 320. Because there is a relative telescopic movement between the second telescopic arm 320 and the fourth telescopic arm 340, there is also a relative movement between the second guide frame 120 and the first guide frame 110 along the length direction of the fourth telescopic arm 340.

[0023] One end of the first drag chain body 130 is mounted on the base arm 200, and the other end is connected to the end of the second guide frame 120 near the tail of the second telescopic arm 320; one end of the second drag chain body 140 is mounted on the first guide frame 110, and the other end is connected to the end of the second guide frame 120 away from the tail of the second telescopic arm 320.

[0024] It is understandable that, since the second guide frame 120 and the first guide frame 110 are arranged side by side (e.g., Figure 1 (As shown in the perspective), the entire second cable chain body 140 is in a bent posture between the first guide frame 110 and the second guide frame 120. Similarly, the second guide frame 120 is mounted on the second telescopic boom 320, and the second telescopic boom 320 and the base boom 200 can also be considered to be arranged side by side, thus the first cable chain body 130 is also in a bent posture. The first cable chain body 130 and the second cable chain body 140 themselves have a certain degree of bending flexibility, so when the telescopic boom performs telescopic movements, it can better protect the pipes or lines installed in the cable chain device 100.

[0025] Please refer to the following: Figure 5 Furthermore, the first guide frame 110 has a guide groove 111 on the side facing the second guide frame 120 to accommodate the second cable chain body 140. The guide groove 111 extends along the length of the first guide frame 110. The second cable chain body 140 is at least partially accommodated in the guide groove 111 along its own length, and the capacity of the second cable chain body 140 in the guide groove 111 varies when the position between the first guide frame 110 and the second guide frame 120 changes. In other words, when the first guide frame 110 and the second guide frame 120 perform telescopic movements with the telescopic boom, they also move relative to each other. At this time, the second cable chain body 140 and the first cable chain body 130 are driven to move, and the second cable chain body 140 can move in and out of the guide groove 111 relative to each other.

[0026] In this embodiment, the width of the guide groove 111 is greater than the width of the second drag chain body 140, and the width of the guide groove 111 is greater than the width of the bottom of the guide groove 111.

[0027] Thus, it can be understood that in this embodiment, by setting the width of the guide groove 111 opening to be greater than the width of the second cable chain body 140, and the width of the guide groove 111 opening to be greater than the width of the guide groove 111 bottom, the second cable chain body 140 can smoothly enter and exit the guide groove 111, avoiding damage caused by contact between the second cable chain body 140 and the sharp edge of the first guide frame 110 or the guide groove 111. The guide groove 111 achieves left and right limit of the second cable chain body 140 in its width direction and positioning guidance in its length direction, ensuring that the second cable chain body 140 moves within the guide groove 111 and maintains a stable motion state, thereby extending the overall service life of the cable chain device 100, reducing later maintenance costs, and reducing safety risks caused by wear.

[0028] The bottom width of the guide groove 111 is clearance-fitted with the width of the second drag chain body 140, wherein the width from the opening of the guide groove 111 to the bottom (e.g.) Figure 5 (The view shown is from top to bottom). The width of the guide groove 111 gradually decreases. Thus, along the depth direction of the guide groove 111, the guide groove 111 is wider at the top and narrower at the bottom (wider at the opening and narrower at the bottom), ensuring that the second cable chain body 140 can smoothly fall from the opening of the guide groove 111 to the bottom of the guide groove 111; and because the bottom width of the guide groove 111 is fitted with the width of the second cable chain body 140, the narrowest part of the bottom of the guide groove 111 can accommodate the second cable chain body 140, so as to prevent the second cable chain body 140 from getting stuck in the guide groove 111.

[0029] In this embodiment, from the opening to the bottom of the guide groove 111, both sides of the guide groove 111 are provided with a bent portion 1110 and a straight portion 1111 connected in sequence, and the bent portion 1110 and the straight portion 1111 are connected by a smooth transition. The smooth transition can avoid damage to the second cable chain body 140 and better protect the second cable chain body 140.

[0030] Optionally, the bent portion 1110 and the straight portion 1111 on the guide groove 111 are integrally bent, or the bent portion 1110 and the straight portion 1111 are welded together.

[0031] Please see Figure 1 and Figure 6The cable chain device 100 also includes a limiting frame 150, which is mounted on the first guide frame 110. A guide space is provided above the limiting frame 150 away from the first guide frame 110, through which the second guide frame 120 is arranged. The guide space on the limiting frame 150 can guide and limit the second guide frame 120, preventing the second guide frame 120 from shifting relative to the first guide frame 110 in the width direction. At the same time, the limiting frame 150 can provide vertical support for the second guide frame 120, preventing the second guide frame 120 from bending and deforming due to gravity when in a cantilevered state.

[0032] Specifically, the limiting frame 150 includes two limiting plates 151 arranged in alignment along the width direction of the first guide frame 110. The two limiting plates 151 are respectively disposed on both sides of the first guide frame 110. The limiting plates 151 and the first guide frame 110 can be installed and fixed by welding, screw connection or riveting.

[0033] Furthermore, a support roller 152 supporting the second guide frame 120 is provided between the two limiting plates 151. The support roller 152 and the second guide frame 120 are in rolling engagement, and a guide cavity is formed between the two limiting plates 151 and the support roller 152. The upper part of the guide cavity is open to facilitate the installation and disassembly of the second guide frame 120. The rolling engagement between the support roller 152 and the second guide frame 120 reduces the contact friction between them, thus reducing wear on the second guide frame and extending its service life.

[0034] The limiting plate 151 has chamfered portions 1510 on both sides along the length of the second guide frame 120. The chamfered portions 1510 on both sides of the limiting plate 151 can prevent the sides of the limiting plate 151 from forming sharp edges that could damage the second guide frame 120.

[0035] Optionally, the chamfer 1510 can be a rounded corner or a beveled chamfer, or other forms of transitional chamfer structures.

[0036] Please see Figure 1 , Figure 6 and Figure 7 In some embodiments, the limiting frame 150 is disposed at the end of the first guide frame 110 near the tail of the basic arm 200. The end of the second guide frame 120 connected to the second cable chain body 140 (the end away from the tail of the basic arm 200) is provided with a guide head 121, and the side of the guide head 121 near the first guide frame 110 is provided with a wedge-shaped guide surface 1210. The wedge-shaped guide surface 1210 allows the second guide frame 120 to smoothly pass over the support roller shaft 152, preventing jamming and reducing resistance, and effectively preventing the second guide frame 120 from being worn and damaged.

[0037] Furthermore, the wedge-shaped guide surface 1210 and the bottom surface of the second guide frame 120 facing the first guide frame 110 are smoothly connected, further reducing resistance.

[0038] In some embodiments, the width of the guide head 121 gradually decreases from the head end of the guide head 121 to the second guide frame 120. That is, the width of the head end of the guide head 121 is smaller than the width of the second guide frame 120, thereby allowing the second guide frame 120 to pass smoothly through the guide cavity, avoiding jamming, reducing resistance, and effectively preventing the second guide frame 120 from being worn and damaged.

[0039] Please see Figure 1 and Figure 6 In some embodiments, the first guide frame 110 is further provided with a bending support plate 160 at one end near the arm tail of the basic arm 200. The bending support plate 160 includes a mounting part 161, a wedge-shaped guide part 162, and a bending support part 163 connected in sequence. The mounting part 161 is mounted on the first guide frame 110. The wedge-shaped surface of the wedge-shaped guide part 162 faces the arm tail of the basic arm 200 and can provide guidance for the movement and installation of the second guide frame 120. The bending support part 163 is located at the end of the wedge-shaped guide part 162 away from the mounting part 161. The bending support part 163 is a cantilever structure. The wedge-shaped guide part 162 has a certain elasticity of vertical floating and can provide elastic support for the movement and installation of the second guide frame 120.

[0040] Please see Figures 1 to 7 On the other hand, this embodiment also provides a telescopic boom. The telescopic boom includes a base boom 200 and a multi-section telescopic boom 300 disposed within the base boom 200, as well as a cable chain device 100 provided above. The multi-section telescopic boom 300 includes a first telescopic boom 310, a second telescopic boom 320, a third telescopic boom 330, and a fourth telescopic boom 340.

[0041] Furthermore, this embodiment also includes aerial work platform machinery, which includes the telescopic boom provided above. The aerial work platform machinery can be selected as an aerial work vehicle.

[0042] It should be noted that, in this application, unless otherwise stated, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] In the description of this application, 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly 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 components; 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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.

[0046] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A cable chain device, characterized in that, It is applied to a telescopic boom, which includes a base boom (200) and multiple telescopic boom sections (300) disposed within the base boom (200). The multiple telescopic boom sections (300) include a first telescopic boom section (310), a second telescopic boom section (320), a third telescopic boom section (330) and a fourth telescopic boom section (340) sequentially mounted from the outside to the inside. The cable chain device (100) includes: The first guide frame (110) is used to be installed inside the fourth telescopic arm (340); The second guide frame (120) is arranged above the first guide frame (110). One end of the second guide frame (120) is used to connect to the tail of the second telescopic arm (320), and the other end is used to extend to the head of the second telescopic arm (320). The first drag chain body (130) has one end set on the basic arm (200) and the other end connected to the end of the second guide frame (120) near the tail of the second telescopic arm (320). The second drag chain body (140) has one end mounted on the first guide frame (110) and the other end connected to the end of the second guide frame (120) away from the tail of the second telescopic joint arm (320). The first guide frame (110) has a guide groove (111) on the side facing the second guide frame (120). The guide groove (111) extends along the length of the first guide frame (110). The width of the groove opening of the guide groove (111) is greater than the width of the second drag chain body (140), and the width of the groove opening of the guide groove (111) is greater than the width of the bottom of the guide groove (111).

2. The cable chain device according to claim 1, characterized in that, The bottom width of the guide groove (111) is fitted with the width of the second drag chain body (140) with a clearance. The width of the guide groove (111) gradually decreases from the opening to the bottom of the groove.

3. The cable chain device according to claim 1, characterized in that, From the opening to the bottom of the guide groove (111), both sides of the guide groove (111) are provided with a bent part (1110) and a straight part (1111) connected in sequence, and the bent part (1110) and the straight part (1111) are connected by a smooth transition.

4. The cable chain device according to claim 1, characterized in that, The cable chain device (100) further includes a limiting frame (150), which is disposed on the first guide frame (110). A guide space is provided above the limiting frame (150) away from the first guide frame (110), and the second guide frame (120) is arranged through the guide space.

5. The cable chain device according to claim 4, characterized in that, The limiting frame (150) includes two limiting plates (151) arranged in alignment along the width direction of the first guide frame (110). The two limiting plates (151) are respectively disposed on both sides of the first guide frame (110). A support roller (152) supporting the second guide frame (120) is provided between the two limiting plates (151). The support roller (152) and the second guide frame (120) are in rolling engagement.

6. The cable chain device according to claim 5, characterized in that, The limiting plate (151) has chamfered portions (1510) on both sides located along the length of the second guide frame (120).

7. The cable chain device according to claim 4, characterized in that, The second guide frame (120) is connected to the second drag chain body (140) at one end, and a guide head (121) is provided on the side of the guide head (121) near the first guide frame (110). The wedge-shaped guide surface (1210) is smoothly connected to the bottom surface of the second guide frame (120) facing the first guide frame (110).

8. The cable chain device according to claim 7, characterized in that, From the head end of the guide head (121) to the second guide frame (120), the width of the guide head (121) gradually decreases.

9. A telescopic boom, characterized in that, It includes a base arm (200) and a multi-section telescopic arm (300) disposed within the base arm (200) and a cable chain device (100) according to any one of claims 1-8.

10. An aerial work platform, characterized in that, Including the telescopic boom as described in claim 9.

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