Crane telescopic arm bolt device driven by hydraulic cylinder

Abstract

The utility model provides a crane telescopic boom bolt device driven by a hydraulic cylinder, which comprises a telescopic hydraulic cylinder, a sliding mechanism and a bolt mechanism, a crane telescopic boom comprises a basic boom and a plurality of sections of telescopic booms, and the root of each section of telescopic boom is provided with a boom pin; the telescopic hydraulic cylinder comprises a piston rod and a cylinder barrel, the piston rod is connected with the root of the basic arm, the sliding mechanism is installed on the cylinder barrel, and the bolt mechanism is connected to the sliding mechanism; reciprocating movement of the cylinder barrel relative to the piston rod is achieved through the telescopic hydraulic cylinder, the sliding mechanism is driven to act through movement of the cylinder barrel, the sliding mechanism is used for driving the plug pin mechanism to slide to each section of telescopic arm along the cylinder barrel, and the plug pin mechanism is used for achieving locking connection of the cylinder barrel and the telescopic arm. And the telescopic arm is driven by the cylinder barrel to extend or retract. The telescopic hydraulic cylinder has the advantages of increasing effective displacement of the cylinder pin and the pin inserting and pulling device, reducing the stroke of the telescopic hydraulic cylinder, reducing the total weight of a boom system, reducing manufacturing cost and being wide in application range.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, and in particular to a latch device for a telescopic arm of a crane driven by a hydraulic cylinder. Background Art

[0002] The telescopic arm latch device is a mechanism for realizing the extension and retraction of the boom, which is usually placed in the telescopic arm and is mainly composed of a telescopic hydraulic cylinder, an arm pin, a cylinder pin, a pin plug-in device, a detection switch, etc. The traditional structural form is that the cylinder pin, the pin plug-in device, etc. are directly installed on the cylinder barrel of the telescopic hydraulic cylinder. Therefore, the effective displacement of the cylinder pin and the pin plug-in device depends on the stroke of the telescopic hydraulic cylinder, and the front and rear arrangement of the arm pin causes the telescopic hydraulic cylinder to lose a part of the stroke. Therefore, to achieve a telescopic arm with a large arm length, a telescopic hydraulic cylinder with a large stroke must be used. Due to the space limitation in the telescopic arm, the use of a telescopic hydraulic cylinder with a large stroke increases the difficulty of space arrangement, and also increases the overall weight and manufacturing cost of the boom system, and is contrary to the green manufacturing model advocated by the country. Utility Model Content

[0003] In response to the technical problems raised above, a hydraulic cylinder driven crane telescopic arm latch device is provided, which has the characteristics of increasing the effective displacement of the cylinder pin and the latching and pulling pin device, reducing the stroke of the telescopic hydraulic cylinder, reducing the overall weight of the arm system, reducing the manufacturing cost, and having a wide range of applications.

[0004] The technical means adopted by the utility model are as follows:

[0005] A hydraulic cylinder driven crane telescopic arm latch device comprises: a telescopic hydraulic cylinder, a sliding mechanism and a latch mechanism, the crane telescopic arm comprises a basic arm and a multi-section telescopic arm, the root of each section of the telescopic arm is provided with an arm pin for locking and connecting with the adjacent telescopic arm; the telescopic hydraulic cylinder comprises a connected piston rod and a cylinder barrel, the piston rod is connected to the root of the basic arm, the sliding mechanism is installed on the cylinder barrel, and the latch mechanism is connected to the sliding mechanism;

[0006] The telescopic hydraulic cylinder is used to realize the reciprocating movement of the cylinder relative to the piston rod, and the movement of the cylinder drives the sliding mechanism to move. The sliding mechanism is used to drive the latch mechanism to slide along the cylinder to each section of the telescopic arm. The latch mechanism is used to realize the locking connection between the cylinder and the telescopic arm. After the locking connection, the telescopic arm is driven by the cylinder to extend or retract.

[0007] Furthermore, the latch mechanism includes a cylinder pin and an insert pin slider, the insert pin slider is connected to the sliding mechanism and is slidably connected to the cylinder, the cylinder pin is connected to the insert pin slider, and the cylinder and the telescopic arm are locked or unlocked by extending or retracting the cylinder pin.

[0008] Further, the sliding mechanism includes a first mechanism and a second mechanism, the first mechanism includes an arm retracting pulley, an arm extension rope, an upper guide rail, an arm retracting rope and an arm extension pulley, the arm retracting pulley is connected to the root of the cylinder, the arm extension pulley is connected to the head of the cylinder, the upper guide rail is connected to the upper part of the outer wall of the cylinder, and the plug-in pin slider is slidably connected to the upper guide rail; one end of the arm extension rope is connected to the plug-in pin slider, and the other end bypasses the arm extension pulley to connect to the second mechanism; one end of the arm retracting rope is connected to the plug-in pin slider, and the other end bypasses the arm retracting pulley to connect to the second mechanism;

[0009] The second mechanism is connected to the root of the basic arm, and the lower part of the cylinder is slidably connected to the second mechanism.

[0010] Furthermore, the second mechanism includes a fixed support tube, a lower slider and a lower guide rail, the fixed support tube is connected to the root of the basic arm, the lower slider is fixedly connected to the fixed support tube, the lower guide rail is connected to the lower part of the outer wall of the cylinder, and the lower slider is slidably connected to the lower guide rail; the other ends of the arm extension rope and the arm retracting rope are respectively connected to the lower slider by passing through the arm extension pulley and the arm retracting pulley.

[0011] Furthermore, the upper guide rail and the lower guide rail are parallel, and are both parallel to the telescopic direction of the telescopic arm.

[0012] Furthermore, a cylinder guide frame is connected to the root of the basic arm, and the cylinder is slidably connected to the cylinder guide frame.

[0013] The utility model also provides a working method of a hydraulic cylinder driven crane telescopic arm latch device, including the extension and retraction actions of the crane telescopic arm;

[0014] The extension action of the crane telescopic arm includes the following steps:

[0015] S1, retract the cylinder pin to unlock, extend the telescopic hydraulic cylinder, and move the plug-in pin slider to the arm pin position at the root of the fifth arm;

[0016] S2, extend the cylinder pin to lock the cylinder barrel and the fifth arm, and pull down the arm pin at the root of the fifth arm;

[0017] S3, the telescopic hydraulic cylinder extends, and the cylinder barrel drives the fifth arm to extend. When the arm pin of the fifth arm is aligned with the arm pin hole of the head of the fourth arm, the movement stops;

[0018] S4, the arm pin at the root of the fifth boom extends to lock the fifth boom with the fourth boom;

[0019] S5, the retracting cylinder pin is unlocked, the telescopic hydraulic cylinder is retracted, the plug-in pin slider is moved to the arm pin position at the root of the fourth arm, and steps S2 to S5 are repeated to extend all telescopic arms, and the telescopic hydraulic cylinder is retracted to the initial state;

[0020] The retracting action of the crane telescopic arm includes the following steps:

[0021] S01, retract the cylinder pin and unlock it, the telescopic hydraulic cylinder extends, and the plug-in pin slider moves to the arm pin position at the root of the second arm section;

[0022] S02, extend the cylinder pin to lock the cylinder barrel and the second arm, and pull down the arm pin at the root of the second arm;

[0023] S03, the telescopic hydraulic cylinder retracts, and the cylinder barrel drives the second arm to retract. When the arm pin of the second arm is aligned with the arm pin hole at the root of the basic arm, the movement stops;

[0024] S04, the arm pin at the root of the second boom is extended to lock the second boom with the basic arm;

[0025] S05. Repeat steps S01 to S04 to achieve the retraction of all telescopic arms, and then the telescopic hydraulic cylinder retracts to the initial state.

[0026] Compared with the prior art, the utility model has the following advantages:

[0027] 1. Since the utility model uses a mechanism in which the arm extension rope passes through the arm extension pulley installed on the upper part of the cylinder barrel and is connected to the plug-in pin slider and the lower slider installed on the fixed support pipe, the displacement of the plug-in pin slider when the hydraulic cylinder is extended is twice the displacement of the cylinder barrel extension.

[0028] 2. Since the utility model uses a mechanism in which the arm retraction rope passes around the arm retraction pulley installed at the lower part of the cylinder barrel and is connected to the plug-in pin slider and the lower slider installed on the fixed support pipe, the displacement of the plug-in pin slider when the hydraulic cylinder retracts is twice the displacement of the cylinder barrel retraction.

[0029] 3. Since the utility model uses a sliding mechanism consisting of a plug-in pin slider and an upper guide rail, and a sliding mechanism consisting of a fixed support tube, a lower slider and a lower guide rail, the plug-in pin slider can accurately run along the upper guide rail on the cylinder barrel when the hydraulic cylinder extends and retracts.

[0030] 4. Since the utility model uses a wire rope-pulley transmission system, it has high reliability and is easy to maintain, which is conducive to large-scale promotion and use.

[0031] 5. Since the utility model increases the effective displacement of the cylinder pin and the pin insertion and extraction device, reduces the stroke of the telescopic hydraulic cylinder, it is helpful to arrange the pin insertion device in the telescopic arm, making it easier to realize a telescopic arm system with a large arm length.

[0032] 6. Since the utility model reduces the stroke of the telescopic hydraulic cylinder, the overall weight of the telescopic arm is reduced, and the production cost is reduced, which is conducive to the green and low-carbon transformation and high-quality development of the manufacturing industry.

[0033] Based on the above reasons, the utility model can be widely promoted in the fields of boom telescopic and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 It is a structural schematic diagram of the utility model.

[0036] Figure 2 It is a schematic diagram of the extension structure of the telescopic hydraulic cylinder.

[0037] Figure 3 This is a working diagram of the plug-in pin slider moving to the arm pin position at the root of the fifth arm.

[0038] Figure 4 It is a schematic diagram of the alignment work of the arm pin of the fifth arm section and the arm pin hole of the head of the fourth arm section.

[0039] Figure 5 It is a schematic diagram of all telescopic arms extending to work.

[0040] Figure 6 It is a schematic diagram of the alignment of the arm pin of the second arm section with the arm pin hole at the root of the basic arm.

[0041] In the figure: 1. arm retracting pulley; 2. arm pin; 3. arm extension rope; 4. upper guide rail; 5. arm retracting rope; 6. telescopic hydraulic cylinder; 7. arm extension pulley; 8. cylinder guide frame; 9. cylinder pin; 10. plug-in pin slider; 11. fixed support pipe; 12. lower slider; 13. lower guide rail; 14. basic arm; 15. second arm section; 16. third arm section; 17. fourth arm section; 18. fifth arm section; 19. piston rod; 20. cylinder. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] The utility model provides a hydraulic cylinder driven crane telescopic arm latch device and a working method thereof, that is, a hydraulic cylinder driven crane telescopic arm latch and a working method including the telescopic arm latch. The cylinder moves along the cylinder guide frame, the lower slider installed on the fixed support pipe is respectively connected to one end of the arm extension rope and the arm retracting rope, the plug-in pin slider is respectively connected to the other end of the arm extension rope and the arm retracting rope, the cylinder pin and the plug-in pin slider slide along the upper guide rail on the cylinder through the pulley and wire rope mechanism, so that the displacement of the cylinder pin and the plug-in pin slider is twice the cylinder telescopic displacement. The utility model can effectively increase the stroke of the cylinder pin and the plug-in pin slider by using the pulley and wire rope mechanism installed on the cylinder, reduce the size of the telescopic hydraulic cylinder, reduce the cost of the telescopic hydraulic cylinder, reduce the total weight of the telescopic arm system, and facilitate the spatial arrangement of the latch device inside the telescopic arm, and has a wide range of applications.

[0044] like Figure 1-6 As shown, the utility model is a hydraulic cylinder driven crane telescopic arm latch device composed of a retracting arm pulley 1, an arm pin 2, an extending arm rope 3, an upper guide rail 4, a retracting arm rope 5, a telescopic hydraulic cylinder 6, an extending arm pulley 7, a cylinder guide frame 8, a cylinder pin 9, a plug-in pin slider 10, a fixed support pipe 11, a lower slider 12, and a lower guide rail 13. The telescopic hydraulic cylinder 6 is composed of a piston rod 19 and a cylinder 20.

[0045] The piston rod 19 is connected to the root of the basic arm 14, the cylinder 20 is slidably connected to the cylinder guide frame 8, the cylinder guide frame 8 is connected to the root of the basic arm 14, the fixed support pipe 11 is connected to the root of the basic arm 14, and the two ends of the cylinder 20 are respectively connected to the arm retracting pulley 1 and the arm extension pulley 7, wherein the arm retracting pulley 1 is connected to the root of the cylinder 20, and the arm extension pulley 7 is connected to the head of the cylinder 20; the outer wall of the cylinder 20 is respectively connected to the upper guide rail 4 and the lower guide rail 13, wherein the upper guide rail 4 is connected to the upper part of the outer wall of the cylinder 20 , the lower guide rail 13 is connected to the lower outer wall of the cylinder 20; the plug-in pin slider 10 is slidably connected to the upper guide rail 4 on the cylinder 20, the lower slider 12 is fixedly connected to the fixed support tube 11, the lower slider 12 is slidably connected to the lower guide rail 13 on the cylinder 20, the cylinder pin 9 is connected to the plug-in pin slider 10, one end of the arm extension rope 3 is connected to the plug-in pin slider 10, and the other end bypasses the arm extension pulley 7 and connects to the lower slider 12; one end of the arm retracting rope 5 is connected to the plug-in pin slider 10, and the other end bypasses the arm retracting pulley 1 and connects to the lower slider 12. The upper guide rail 4 and the lower guide rail 13 are parallel, and are both parallel to the telescopic direction of the telescopic arm.

[0046] The utility model also provides a working method of a hydraulic cylinder-driven crane telescopic arm latch device to realize the telescopic arm extension and retraction actions of the crane.

[0047] When the telescopic arm is extended, the arm extension action includes the following steps:

[0048] A. Retract the cylinder pin 9 to unlock, extend the telescopic hydraulic cylinder 6, and move the plug-in pin slider 10 to the arm pin 2 position at the root of the fifth arm 18 ( Figure 3 );

[0049] B. Extend the cylinder pin 9 to lock the cylinder barrel 20 with the fifth arm 18, and pull down the arm pin 2 at the root of the fifth arm 18;

[0050] C. The telescopic hydraulic cylinder 6 extends, and the cylinder barrel 20 drives the fifth arm 18 to extend. When the arm pin 2 of the fifth arm 18 is aligned with the arm pin hole at the head of the fourth arm 17, the movement stops ( Figure 4 );

[0051] D. The arm pin 2 at the root of the fifth arm 18 extends to lock the fifth arm 18 with the fourth arm 17;

[0052] E. The retracting cylinder pin 9 is unlocked, the telescopic hydraulic cylinder 6 is retracted, and the plug-in pin slider 10 moves to the arm pin 2 position at the root of the fourth arm 17. The fourth arm 17 is extended according to the above-mentioned fifth arm 18 extension steps, and the remaining telescopic arms are also extended according to the fifth arm 18 extension steps, thereby achieving the extension of all telescopic arms ( Figure 5 ), namely, the extension of the fifth boom 18, the fourth boom 17, the third boom 16, and the second boom 15 is realized in sequence. After all telescopic arms are extended, the telescopic hydraulic cylinder 6 is retracted to the initial state.

[0053] When the telescopic arm is retracted, the retracting action includes the following steps:

[0054] A. Retract the cylinder pin 9 to unlock, extend the telescopic hydraulic cylinder 6, and move the plug-in pin slider 10 to the arm pin 2 position at the root of the second arm 15 ( Figure 5 );

[0055] B. Extend the cylinder pin 9 to lock the cylinder barrel 20 with the second arm 15, and pull down the arm pin 2 at the root of the second arm 15;

[0056] C. The telescopic hydraulic cylinder 6 retracts, and the cylinder barrel 20 drives the second arm 15 to retract. When the arm pin 2 of the second arm 15 is aligned with the arm pin hole at the root of the basic arm 14, the movement stops ( Figure 6 );

[0057] D. The arm pin 2 at the root of the second section arm 15 extends to lock the second section arm 15 with the basic arm 14;

[0058] E. The remaining telescopic arms follow the retraction steps of the second arm 15 to achieve the retraction of all telescopic arms ( Figure 1 ), namely, the retraction of the second boom 15, the third boom 16, the fourth boom 17, and the fifth boom 18 is realized in sequence. After all telescopic arms are retracted, the telescopic hydraulic cylinder 6 is retracted to the initial state.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A hydraulic cylinder driven crane telescopic arm latch device, characterized in that: include: A telescopic hydraulic cylinder (6), a sliding mechanism and a latch mechanism, wherein the telescopic arm of the crane comprises a basic arm (14) and a plurality of telescopic arms, and an arm pin (2) is provided at the root of each telescopic arm for locking and connecting with an adjacent telescopic arm; the telescopic hydraulic cylinder (6) comprises a piston rod (19) and a cylinder barrel (20) connected to each other, the piston rod (19) being connected to the root of the basic arm (14), the sliding mechanism being mounted on the cylinder barrel (20), and the latch mechanism being connected to the sliding mechanism; The telescopic hydraulic cylinder (6) is used to realize reciprocating movement of the cylinder barrel (20) relative to the piston rod (19), and the movement of the cylinder barrel (20) drives the sliding mechanism to move. The sliding mechanism is used to drive the latch mechanism to slide along the cylinder barrel (20) to each section of the telescopic arm. The latch mechanism is used to realize locking connection between the cylinder barrel (20) and the telescopic arm. After the locking connection, the telescopic arm is driven to extend or retract through the cylinder barrel (20).

2. The hydraulic cylinder driven crane telescopic arm latch device according to claim 1, characterized in that: The latch mechanism comprises a cylinder pin (9) and a plug-in pin slider (10); the plug-in pin slider (10) is connected to the sliding mechanism and is slidably connected to the cylinder barrel (20); the cylinder pin (9) is connected to the plug-in pin slider (10); and the cylinder barrel (20) and the telescopic arm are locked or unlocked by extending or retracting the cylinder pin (9).

3. The hydraulic cylinder driven crane telescopic arm latch device according to claim 2, characterized in that: The sliding mechanism comprises a first mechanism and a second mechanism, wherein the first mechanism comprises an arm retracting pulley (1), an arm extension rope (3), an upper guide rail (4), an arm retracting rope (5) and an arm extension pulley (7), wherein the arm retracting pulley (1) is connected to the root of the cylinder (20), the arm extension pulley (7) is connected to the head of the cylinder (20), the upper guide rail (4) is connected to the upper part of the outer wall of the cylinder (20), and the plug-in pin slider (10) is slidably connected to the upper guide rail (4); one end of the arm extension rope (3) is connected to the plug-in pin slider (10), and the other end bypasses the arm extension pulley (7) to connect to the second mechanism; one end of the arm retracting rope (5) is connected to the plug-in pin slider (10), and the other end bypasses the arm retracting pulley (1) to connect to the second mechanism; The second mechanism is connected to the root of the basic arm (14), and the lower part of the cylinder (20) is slidably connected to the second mechanism.

4. The hydraulic cylinder driven crane telescopic arm latch device according to claim 3, characterized in that: The second mechanism comprises a fixed support tube (11), a lower slider (12) and a lower guide rail (13); the fixed support tube (11) is connected to the root of the basic arm (14); the lower slider (12) is fixedly connected to the fixed support tube (11); the lower guide rail (13) is connected to the lower part of the outer wall of the cylinder (20); the lower slider (12) is slidably connected to the lower guide rail (13); the other ends of the arm extension rope (3) and the arm retracting rope (5) are connected to the lower slider (12) by passing through the arm extension pulley (7) and the arm retracting pulley (1) respectively.

5. The hydraulic cylinder driven crane telescopic arm latch device according to claim 4, characterized in that: The upper guide rail (4) and the lower guide rail (13) are parallel and are both parallel to the telescopic direction of the telescopic arm.

6. The hydraulic cylinder driven crane telescopic arm latch device according to claim 1, characterized in that: The root of the basic arm (14) is connected to a cylinder guide frame (8), and the cylinder (20) is slidably connected to the cylinder guide frame (8).

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