Folding arm type crane suspension arm with built-in oil cylinder pipeline

Abstract

The utility model discloses a folding arm type crane jib with a built-in oil cylinder pipeline, and relates to the technical field of crane jibs, the folding arm type crane jib comprises a second extension arm and a third extension arm, the second extension arm and the third extension arm are respectively of a cylindrical structure with two open ends, and the third extension arm is slidably connected to the inner bottom of the second extension arm. A pipeline containing gap is reserved between the top of the third extending arm and the inner top of the second extending arm, the inner right end of the second extending arm is connected with the interior of the third extending arm through a first linear driving mechanism, the first linear driving mechanism is connected with a hydraulic pipeline assembly, and the hydraulic pipeline assembly penetrates through the pipeline containing gap. According to the folding arm type crane suspension arm with the built-in oil cylinder pipeline, the third extension arm reciprocates relative to the second extension arm through the first linear driving mechanism mounted in the third extension arm, and a hydraulic flexible circuit penetrates through a pipeline accommodating gap between the third extension arm and the upper part of the second extension arm, so that the external mounting space of the suspension arm can be saved, and the size of the suspension arm is reduced; and the folding arm type crane can work and move in a low space.

Description

TECHNICAL FIELD

[0001] The utility model relates to a crane boom technical field, concretely is a kind of folding arm type crane boom with oil cylinder pipeline built-in. BACKGROUND

[0002] Folding arm type crane is currently widely used, in prior art, the boom of folding arm type crane realizes reciprocating motion with load by external linear drive mechanism, so as to realize the telescopic activity of boom, however, when the number of boom is more, the linear drive mechanism also increases, multiple linear drive mechanisms are externally arranged on boom, which can cause the bulky external structure of boom, and the volume increases, which is contradictory to the main working environment of folding arm type crane, which is low space. SUMMARY

[0003] The utility model solves the technical problems of overcoming the defects of the prior art, and provides a folding arm type crane boom with oil cylinder pipeline built-in, the third arm is reciprocated relative to the second arm by the linear drive mechanism installed in the third arm, the gap for accommodating the pipeline between the third arm and the upper part of the second arm is used to pass the hydraulic soft pipeline, which can save the installation space outside the boom, simplify the external structure of the boom, reduce the volume of the boom, facilitate the working activity of the folding arm type crane in low space, and also avoid damage to the linear drive mechanism caused by collision by embedding the linear drive mechanism, which can effectively solve the problems in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a folding arm type crane boom with oil cylinder pipeline built-in, comprising a second arm and a third arm, the second arm and the third arm are both cylindrical structures with open ends, the third arm is slidably connected to the inner bottom of the second arm, and a gap for accommodating the pipeline is left between the top of the third arm and the inner top of the second arm, the inner right end of the second arm is connected to the inside of the third arm by a linear drive mechanism, and the linear drive mechanism is connected to a hydraulic pipeline assembly, and the hydraulic pipeline assembly passes through the gap for accommodating the pipeline.

[0005] The third arm is reciprocated relative to the second arm by the linear drive mechanism installed in the third arm, the linear drive mechanism is embedded, which can simplify the external structure of the boom and protect the linear drive mechanism, avoid accidental collision and damage to the linear drive mechanism, the hydraulic pipeline assembly connected to the linear drive mechanism passes through the gap for accommodating the pipeline, which can be connected in series with the linear drive mechanism of the previous section arm.

[0006] Further, the linear drive mechanism comprises a hydraulic cylinder, the inner right end of the second arm is movably connected to the fixed end of the hydraulic cylinder, and the telescopic end of the hydraulic cylinder is movably connected to the inside of the third arm. The hydraulic cylinder comprises a cylinder body, a piston and a piston rod, and the extension and contraction of the hydraulic cylinder drives the third arm to reciprocate relative to the second arm.

[0007] Furthermore, the linear drive mechanism 1 further includes a support 1, a movable shaft 1, an end block, a movable shaft 2, and a support 2. The right end of the inner side of the second extension arm is fixedly connected to the support 1, and the support 1 is movably connected to the fixed end of the hydraulic cylinder via the movable shaft 1. The telescopic end of the hydraulic cylinder is fixedly connected to the end block, and the end block is movably connected to the support 2 via the movable shaft 2. The support 2 is installed inside the third extension arm. The support 1 and the movable shaft 1 are used to connect the second extension arm to the fixed end of the hydraulic cylinder, and the end block, the movable shaft 2, and the support 2 are used to connect the telescopic end of the hydraulic cylinder to the third extension arm. Since both ends of the hydraulic cylinder are connected movably, they can effectively protect the hydraulic cylinder from damage caused by radial forces.

[0008] Furthermore, the hydraulic pipeline assembly includes a fixed hydraulic pipeline, a pipe joint, and a hydraulic soft circuit. The cylinder body of the hydraulic cylinder is connected to the left end of the fixed hydraulic pipeline, and the right end of the fixed hydraulic pipeline extends to the outside of the right end of the extension arm. The right end of the fixed hydraulic pipeline is connected to the right end of the hydraulic soft circuit via a pipe joint, and the hydraulic soft circuit passes through the pipeline accommodation gap. The arrangement of the fixed hydraulic pipeline prevents it from being scattered inside the extension arm. The hydraulic soft circuit is a flexible pipeline that can move with the left and right movement of the extension arm.

[0009] Furthermore, the hydraulic circuit assembly further includes a solenoid valve and a hydraulic cylinder serial line. The left end of the hydraulic circuit extends to the outside of the left end of the extension arm and is connected to one end of the hydraulic cylinder serial line via the solenoid valve. The solenoid valve is used to control the on / off of the hydraulic cylinder serial line and the hydraulic circuit.

[0010] Furthermore, the crane also includes a second linear drive mechanism and a mounting bracket. The second linear drive mechanism is mounted on the left end of the second boom via the mounting bracket, and the other end of the hydraulic cylinder serial pipeline is connected to the second linear drive mechanism. The second linear drive mechanism serves as the linear drive mechanism for the preceding boom section and utilizes a hydraulic cylinder serial pipeline, fixed hydraulic pipelines, pipe joints, and hydraulic flexible circuits connected in series with the hydraulic cylinders in the first linear drive mechanism, facilitating the sequential extension or contraction of different boom sections of the knuckle boom crane.

[0011] Furthermore, a locking protection assembly is provided on the left end of the third boom. When the third boom is fully retracted into the second boom, the locking protection assembly is used to secure the left end of the third boom to prevent the third boom from accidentally extending from the second boom during crane movement.

[0012] Furthermore, the locking protection assembly includes a fixing sleeve, a fixing bolt, and a locking lug. The fixing sleeve is sleeved on the left end of the three-arm extension, and its two sides are fixedly connected to the three-arm extension via two fixing bolts. The bottom of the fixing sleeve is fixedly connected to the locking lug. The fixing sleeve and fixing bolt cooperate to install the locking lug. The ear hole on the locking lug can be engaged with an external locking hook, which is used to hook the locking lug onto the locking hook, thereby preventing the three-arm extension from accidentally extending from the second arm extension.

[0013] Compared with the existing technology, the beneficial effects of the folding arm crane boom with built-in oil cylinder pipeline are:

[0014] The third arm is reciprocated relative to the second arm through a linear drive mechanism installed inside the third arm. The pipeline between the third arm and the upper part of the second arm allows the hydraulic circuit to pass through, which can save installation space outside the boom, simplify the external structure of the boom, reduce the volume of the boom, and facilitate the operation of the folding arm crane in a low space. At the same time, the built-in linear drive mechanism can also prevent the linear drive mechanism from being damaged by collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a left-side structural diagram of the present utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 4 For this utility model Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0019] Figure 5 For this utility model Figure 3 A schematic diagram of the partially enlarged structure at point B in the middle;

[0020] In the figure: 1 extending two arms, 2 extending three arms, 3 linear drive mechanism 1, 31 support 1, 32 movable shaft 1, 33 hydraulic cylinder, 34 end block, 35 movable shaft 2, 36 support 2, 4 hydraulic pipeline assembly, 41 fixed hydraulic pipeline, 42 pipe joint, 43 hydraulic soft circuit, 44 solenoid valve, 45 hydraulic cylinder series pipeline, 5 protective plate, 6 linear drive mechanism 2, 7 locking protection assembly, 71 fixing sleeve, 72 fixing bolt, 73 locking ear seat, 8 mounting frame. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] For example 1, please refer to Figures 1 to 5 The utility model provides a technical solution: a folding arm crane boom with built-in oil cylinder pipeline, including an extension arm 1 and an extension arm 2. The extension arm 1 and the extension arm 2 are both cylindrical structures with open ends. The bottom of the extension arm 1 is slidingly connected to the extension arm 2, and a pipeline accommodating gap is left between the top of the extension arm 2 and the top of the extension arm 1. The right end of the extension arm 1 is connected to the inside of the extension arm 2 through a linear drive mechanism 3, and the linear drive mechanism 3 is connected to a hydraulic pipeline assembly 4, and the hydraulic pipeline assembly 4 passes through the pipeline accommodating gap.

[0023] A protective plate 5 is installed on the upper right side of the extension arm 1 , and the protective plate 5 can strengthen and protect the upper right side of the extension arm 1 .

[0024] The third arm 2 moves back and forth relative to the second arm 1 through the linear drive mechanism 3 installed in the third arm 2. The built-in linear drive mechanism 3 can simplify the external structure of the boom and protect the linear drive mechanism 3 to avoid accidental collision and damage to the linear drive mechanism 3. The hydraulic pipeline assembly 4 connected to the linear drive mechanism 3 passes through the pipeline accommodating gap and can be connected in series with the linear drive mechanism of the previous arm.

[0025] Linear drive mechanism 1 (3) includes a hydraulic cylinder 33. The inner right end of the second extension arm (1) is movably connected to the fixed end of the hydraulic cylinder 33, while the telescopic end of the hydraulic cylinder 33 is movably connected to the interior of the third extension arm (2). The hydraulic cylinder 33 comprises a cylinder body, a piston, and a piston rod. The extension and contraction of the hydraulic cylinder 33 drives the third extension arm (2) to reciprocate relative to the second extension arm (1).

[0026] The method of using an external hydraulic source to transport hydraulic oil into the cylinder body of the hydraulic cylinder 33 to drive the hydraulic cylinder 33 to extend and retract adopts the existing technology.

[0027] The linear drive mechanism 1 further includes a support 1 31, a movable shaft 1 32, an end block 34, a movable shaft 2 35, and a support 2 36. The right end of the second extension arm 1 is fixedly connected to the support 1 31, which is movably connected to the fixed end of the hydraulic cylinder 33 via a movable shaft 1 32. The telescopic end of the hydraulic cylinder 33 is fixedly connected to the end block 34, which is movably connected to the support 2 36 via a movable shaft 2 35. The support 2 36 is mounted inside the third extension arm 2. The support 1 31 and the movable shaft 1 32 are used to connect the second extension arm 1 to the fixed end of the hydraulic cylinder 33, while the end block 34, the movable shaft 2 35, and the support 2 36 are used to connect the telescopic end of the hydraulic cylinder 33 to the third extension arm 2. Since both ends of the hydraulic cylinder 33 are connected movably, they can effectively protect the hydraulic cylinder 33 from damage caused by radial forces.

[0028] The hydraulic line assembly 4 includes a fixed hydraulic line 41, a pipe joint 42, and a hydraulic circuit 43. The cylinder body of the hydraulic cylinder 33 is connected to the left end of the fixed hydraulic line 41. The right end of the fixed hydraulic line 41 extends to the outside of the right end of the boom 2. The right end of the fixed hydraulic line 41 is connected to the right end of the hydraulic circuit 43 via the pipe joint 42. The hydraulic circuit 43 passes through the pipe accommodation gap. The arrangement of the fixed hydraulic line 41 prevents it from being scattered inside the boom 2. The hydraulic circuit 43 is a flexible line that can move with the left and right movements of the boom 2.

[0029] For example 2, please refer to Figures 1 to 5 The present invention provides a technical solution: a folding arm crane boom with a built-in oil cylinder pipeline. The structure of this embodiment is roughly the same as that of the first embodiment, except that:

[0030] The hydraulic circuit assembly 4 also includes a solenoid valve 44 and a hydraulic cylinder series line 45. The left end of the hydraulic circuit 43 extends to the outside of the left end of the extension arm 1 and is connected to one end of the hydraulic cylinder series line 45 through the solenoid valve 44. The solenoid valve 44 is used to control the on and off of the hydraulic cylinder series line 45 and the hydraulic circuit 43.

[0031] The jib crane also includes a linear drive mechanism 26 and a mounting bracket 8. The left end of the extended boom 1 is mounted with the linear drive mechanism 26 via the mounting bracket 8. The primary structure of the linear drive mechanism 26 also utilizes a hydraulic cylinder. The other end of the hydraulic cylinder serial line 45 is connected to the cylinder body of the hydraulic cylinder in the linear drive mechanism 26. The linear drive mechanism 26 serves as the linear drive mechanism for the preceding boom section. The hydraulic cylinder serial line 45, fixed hydraulic line 41, pipe joint 42, and hydraulic flexible circuit 43 are connected in series with the hydraulic cylinder 33 in the linear drive mechanism 13, facilitating the sequential extension or contraction of different boom sections of the folding boom crane.

[0032] For example three, please refer to Figures 1 to 5The present invention provides a technical solution: a folding arm crane boom with a built-in oil cylinder pipeline. The structure of this embodiment is roughly the same as that of the second embodiment, except that:

[0033] The crane also includes a locking protection assembly 7, which is installed on the left end of the third extension arm 2. When the third extension arm 2 is fully retracted into the second extension arm 1, the locking protection assembly 7 is required to secure the left end of the third extension arm 2 to prevent the third extension arm 2 from accidentally extending from the second extension arm 1 when the crane is moved.

[0034] The locking protection assembly 7 includes a fixing sleeve 71, a fixing bolt 72, and a locking lug 73. The fixing sleeve 71 is sleeved onto the left end of the triple-extension arm 2. Two fixing bolts 72 securely connect the fixing sleeve 71 to the triple-extension arm 2 on either side. The bottom of the fixing sleeve 71 is fixedly connected to the locking lug 73. The fixing sleeve 71 and the fixing bolt 72 cooperate to mount the locking lug 73. The lug hole on the locking lug 73 engages with an external locking hook, which hooks onto the locking lug 73, preventing the triple-extension arm 2 from accidentally extending from the second extension arm 1.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A folding arm crane boom with a built-in oil cylinder pipeline, comprising a two-arm extension (1) and a three-arm extension (2), wherein the two-arm extension (1) and the three-arm extension (2) are both cylindrical structures with both ends open, characterized in that: The inner bottom of the second arm (1) is slidably connected to the third arm (2), and a pipeline accommodating gap is left between the top of the third arm (2) and the inner top of the second arm (1). The right end of the inner side of the second arm (1) is connected to the inside of the third arm (2) through a linear drive mechanism (3), and the linear drive mechanism (3) is connected to a hydraulic pipeline assembly (4), and the hydraulic pipeline assembly (4) passes through the pipeline accommodating gap.

2. The boom of a knuckle-arm crane with built-in oil cylinder pipeline according to claim 1, characterized in that: The linear drive mechanism (3) includes a hydraulic cylinder (33), the right end of the inner side of the second extension arm (1) is movably connected to the fixed end of the hydraulic cylinder (33), and the telescopic end of the hydraulic cylinder (33) is movably connected to the interior of the third extension arm (2).

3. The boom of a knuckle boom crane with built-in oil cylinder pipeline according to claim 2, characterized in that: The linear drive mechanism (3) further comprises a support (31), a movable shaft (32), an end block (34), a movable shaft (35) and a support (36). The right end of the inner side of the second extension arm (1) is fixedly connected to the support (31). The support (31) is movably connected to the fixed end of the hydraulic cylinder (33) through the movable shaft (32). The telescopic end of the hydraulic cylinder (33) is fixedly connected to the end block (34). The end block (34) is movably connected to the support (36) through the movable shaft (35). The support (36) is installed inside the third extension arm (2).

4. The boom of a knuckle-arm crane with built-in oil cylinder pipeline according to claim 2, characterized in that: The hydraulic pipeline assembly (4) includes a fixed hydraulic pipeline (41), a pipe joint (42), and a hydraulic soft circuit (43). The cylinder body of the hydraulic cylinder (33) is connected to the left end of the fixed hydraulic pipeline (41), the right end of the fixed hydraulic pipeline (41) extends to the outside of the right end of the extension arm (2), and the right end of the fixed hydraulic pipeline (41) is connected to the right end of the hydraulic soft circuit (43) through the pipe joint (42). The hydraulic soft circuit (43) passes through the pipeline accommodating gap.

5. The boom of a knuckle boom crane with built-in oil cylinder pipeline according to claim 4, characterized in that: The hydraulic pipeline assembly (4) further includes a solenoid valve (44) and a hydraulic cylinder series pipeline (45). The left end of the hydraulic soft circuit (43) extends to the outside of the left end of the extension arm (1) and is connected to one end of the hydraulic cylinder series pipeline (45) through the solenoid valve (44).

6. The boom of a knuckle boom crane with built-in oil cylinder pipeline according to claim 5, characterized in that: It also includes a second linear drive mechanism (6) and a mounting frame (8), wherein the left end of the second extension arm (1) is mounted with the second linear drive mechanism (6) via the mounting frame (8), and the other end of the hydraulic cylinder series pipeline (45) is connected to the second linear drive mechanism (6).

7. The boom of a knuckle boom crane with built-in oil cylinder pipeline according to claim 1, characterized in that: It also includes a locking protection component (7), and the left end of the extending triple arm (2) is equipped with a locking protection component (7).

8. A folding arm crane boom with a built-in oil cylinder pipeline according to claim 7, wherein the locking protection assembly (7) includes a fixing sleeve (71), a fixing bolt (72) and a locking ear seat (73), the left end of the extension arm (2) is sleeved with the fixing sleeve (71), the two sides of the fixing sleeve (71) are fixedly connected to the extension arm (2) by two fixing bolts (72), and the bottom of the fixing sleeve (71) is fixedly connected to the locking ear seat (73).

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