Crane telescopic arm bolt device of chain wheel and chain mechanism driven by hydraulic motor

Abstract

The utility model provides a crane telescopic arm bolt device of a chain wheel and chain mechanism driven by a hydraulic motor, which comprises a locking device, the hydraulic motor, a rotating device and a supporting device, a crane telescopic arm comprises a basic arm and a plurality of sections of telescopic arms, and an arm pin is arranged at the root of each section of telescopic arm and is used for being locked and connected with the adjacent telescopic arm; the supporting device is connected with the root of the basic boom, the rotating device is installed on the supporting device, the locking device is connected to the rotating device, the hydraulic motor is connected with the rotating device and used for driving the rotating device to rotate, the rotating device is used for driving the locking device to move to each section of telescopic boom, and the locking device is used for achieving locking connection between the rotating device and the telescopic boom. After locking connection, the hydraulic motor drives the rotating device to drive the telescopic arm to stretch out or retract. The utility model has the characteristics of increasing the effective displacement of the cylinder pin and the plug pin device, reducing the size of the telescopic arm plug pin device, reducing the total weight of the boom system, reducing the manufacturing cost and having wide application range.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, and in particular to a crane telescopic arm latch device of a sprocket chain mechanism driven by a hydraulic motor. 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 control limitations in the telescopic arm, the use of a telescopic hydraulic cylinder with a large stroke increases the difficulty of spatial 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 crane telescopic arm latch device with a hydraulic motor driven sprocket chain mechanism is provided, which has the characteristics of increasing the effective displacement of the cylinder pin and the plug-in pin device, reducing the size of the telescopic arm latch device, reducing the overall weight of the boom 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 pin device for a crane telescopic arm with a sprocket chain mechanism driven by a hydraulic motor comprises: a locking device, a hydraulic motor, a rotating device and a supporting device. The crane telescopic arm comprises a basic arm and a multi-section telescopic arm. An arm pin is provided at the root of each telescopic arm for locking and connecting with an adjacent telescopic arm. The supporting device is connected to the root of the basic arm, the rotating device is installed on the supporting device, the locking device is connected to the rotating device, the hydraulic motor is connected to the rotating device for driving the rotating device to rotate, the rotating device is used to drive the locking device to move to each section of the telescopic arm, and the locking device is used to realize a locking connection between the rotating device and the telescopic arm. After the locking connection, the rotating device is driven by the hydraulic motor to drive the telescopic arm to extend or retract.

[0006] Furthermore, the locking device includes a cylinder pin and a plug-in pin slider, the plug-in pin slider is connected to the rotating device, and the cylinder pin is connected to the plug-in pin slider, and the rotating device and the telescopic arm are locked or unlocked by extending or retracting the cylinder pin.

[0007] Furthermore, the rotating device includes a driving mechanism and a guide rail, the guide rail is installed on the supporting device, the plug-in pin slider is slidably connected to the guide rail, and the driving mechanism is connected to the plug-in pin slider for driving the plug-in pin slider to move along the guide rail.

[0008] Furthermore, the driving mechanism includes a bottom drive sprocket, a telescopic arm chain and a top drive sprocket, the bottom drive sprocket is connected to the bottom of the support device, the top drive sprocket is connected to the top of the support device, the telescopic arm chain bypasses the bottom drive sprocket and the top drive sprocket and is connected to both sides of the plug-in pin slider, and the output end of the hydraulic motor is connected to the bottom drive sprocket.

[0009] Furthermore, the guide rail is parallel to the telescopic direction of the telescopic arm.

[0010] Furthermore, the supporting device adopts a supporting frame.

[0011] The utility model also provides a working method of a crane telescopic arm latch device with a hydraulic motor driving a sprocket chain mechanism, including an arm extension action and an arm retraction action of the crane telescopic arm;

[0012] The extension action of the crane telescopic arm includes the following steps:

[0013] Step 1: Retract the cylinder pin to unlock it, and use the hydraulic motor to drive the bottom drive sprocket and the top drive sprocket to rotate clockwise, driving the plug-in pin slider to move to the arm pin position at the root of the fifth arm;

[0014] Step 2: Extend the cylinder pin to lock the telescopic arm chain with the fifth arm section, and pull down the arm pin at the root of the fifth arm section;

[0015] Step 3: The bottom drive sprocket and the top drive sprocket rotate clockwise, and the telescopic arm chain drives the fifth arm to extend. When the arm pin of the fifth arm is aligned with the arm pin hole at the head of the fourth arm, the movement stops;

[0016] Step 4: The arm pin at the root of the fifth arm is extended to lock the fifth arm with the fourth arm;

[0017] Step 5: Retract the cylinder pin, rotate the bottom drive sprocket and the top drive sprocket counterclockwise, and drive the plug-in pin slider to move to the arm pin position at the root of the fourth arm. Repeat steps 2 to 5 to extend all telescopic arms, and then drive the plug-in pin slider to move to the initial state through the bottom drive sprocket and the top drive sprocket.

[0018] The retracting action of the crane telescopic arm includes the following steps:

[0019] Step 1: Retract the cylinder pin to unlock, the bottom drive sprocket and the top drive sprocket rotate clockwise, and the plug-in pin slider moves to the arm pin position at the root of the second arm;

[0020] Step 2: Extend the cylinder pin to lock the telescopic arm chain with the second arm section, and pull down the arm pin at the root of the second arm section;

[0021] Step 3: The bottom drive sprocket and the top drive sprocket rotate counterclockwise, and the telescopic arm chain 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;

[0022] Step 4: The arm pin at the root of the second arm is extended to lock the second arm with the basic arm;

[0023] Step 5: Repeat steps 1 to 5 to retract all telescopic arms, and then drive the plug-in pin slider to move to the initial state through the bottom drive sprocket and the top drive sprocket.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] 1. Since the utility model uses a hydraulic motor to drive a sprocket chain system instead of a telescopic hydraulic cylinder, the effective displacement of the cylinder pin and the plug-in pin device is increased, making it easier to realize a large-arm long telescopic arm system.

[0026] 2. Since the utility model uses a hydraulic motor to drive a sprocket chain system instead of a telescopic hydraulic cylinder, the total volume of the drive system is reduced, the spatial arrangement of the pin insertion and extraction device in the telescopic arm is convenient, and sufficient construction space is left for future maintenance and repair.

[0027] 3. Since the utility model uses a hydraulic motor as a power element, it can transmit a large torque, has a simple structure, reliable operation, stable performance, fast response speed, and easy maintenance.

[0028] 4. Since the utility model uses a transmission mechanism composed of a sprocket and a chain, it has large transmission power, strong overload capacity, high transmission efficiency and reliability, long service life, and is convenient for wide-scale promotion and use.

[0029] 5. Since the utility model uses a hydraulic motor, a sprocket, and a chain to form a driving system, and the plug-in pin slider and a track form a sliding mechanism, when the hydraulic motor rotates, the plug-in pin slider can accurately run along the track fixed on the support frame.

[0030] 6. Since the utility model uses a hydraulic motor to drive a sprocket chain system instead of a telescopic hydraulic cylinder, the overall weight of the telescopic arm is reduced, and the production cost is reduced, which is conducive to the promotion of green and low-carbon products and sustainable development of the heavy machinery industry.

[0031] 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

[0032] 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.

[0033] Figure 1 It is a structural schematic diagram of the utility model.

[0034] Figure 2 This is a working diagram of the plug-in pin slider moving to the arm pin position at the root of the fifth arm.

[0035] Figure 3 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.

[0036] Figure 4 It is a schematic diagram of all telescopic arms extending to work.

[0037] Figure 5 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.

[0038] In the figure: 1. bottom drive sprocket; 2. arm pin; 3. telescopic arm chain; 4. guide rail; 5. top drive sprocket; 6. cylinder pin; 7. plug-in pin slider; 8. support frame; 9. basic arm; 10. second section arm; 11. third section arm; 12. fourth section arm; 13. fifth section arm. DETAILED DESCRIPTION

[0039] 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.

[0040] The utility model provides a crane telescopic arm latch device with a hydraulic motor driven sprocket chain mechanism and a working method thereof, that is, a crane telescopic arm latch with a hydraulic motor driven sprocket chain mechanism and a working method including the telescopic arm latch. A bottom drive sprocket and a top drive sprocket are respectively installed at both ends of a support frame, and the rotation of the two drive sprockets drives the plug-in pin slider and the cylinder pin installed on the telescopic arm chain to slide up and down along the track to achieve the extension and retraction of each arm section. The utility model uses a bottom drive sprocket, a top drive sprocket, and a telescopic arm chain system installed on the support frame, which can effectively increase the stroke of the cylinder pin and the plug-in pin slider, reduce the size of the telescopic arm latch device, reduce the total weight of the telescopic arm system, reduce the manufacturing cost, and facilitate the spatial arrangement of the latch device inside the telescopic arm, and has a wide range of applications.

[0041] like Figure 1-5 As shown, a hydraulic motor driven sprocket chain mechanism of a crane telescopic arm latch device of the utility model is composed of a bottom drive sprocket 1, an arm pin 2, a telescopic arm chain 3, a guide rail 4, a top drive sprocket 5, a cylinder pin 6, a plug-in pin slider 7, and a support frame 8. The support frame 8 is connected to the root of the basic arm 9, the guide rail 4 is connected to the support frame 8, and the two ends of the support frame 8 are respectively connected to the bottom drive sprocket 1 and the top drive sprocket 5, wherein the bottom drive sprocket 1 is connected to the bottom of the support frame 8, the top drive sprocket 5 is connected to the top of the support frame 8, the plug-in pin slider 7 is slidably connected to the guide rail 4, the cylinder pin 6 is connected to the plug-in pin slider 7, the telescopic arm chain 3 bypasses the bottom drive sprocket 1 and the top drive sprocket 5 and is connected to both sides of the plug-in pin slider 7, and the output end of the hydraulic motor is connected to the bottom drive sprocket 1. The guide rail 4 is parallel to the telescopic direction of the telescopic arm.

[0042] The utility model also provides a working method of a crane telescopic arm latch device with a hydraulic motor driving a sprocket chain mechanism, which realizes the telescopic arm extension and retraction actions of the crane telescopic arm.

[0043] When the telescopic arm is extended, the arm extension action includes the following steps:

[0044] A. Retract the cylinder pin 6 to unlock, and drive the bottom drive sprocket 1 and the top drive sprocket 5 to rotate clockwise through the hydraulic motor, driving the plug-in pin slider 7 to move to the arm pin 2 position at the root of the fifth arm 13 ( Figure 2 );

[0045] B. Extend the cylinder pin 6 to lock the telescopic arm chain 3 with the fifth arm 13, and pull down the arm pin 2 at the root of the fifth arm 13;

[0046] C. The bottom drive sprocket 1 and the top drive sprocket 5 rotate clockwise, and the telescopic arm chain 3 drives the fifth arm 13 to extend. When the arm pin 2 of the fifth arm 13 is aligned with the arm pin hole at the head of the fourth arm 12, the movement stops ( Figure 3 );

[0047] D. The arm pin 2 at the root of the fifth arm 13 extends to lock the fifth arm 13 with the fourth arm 12;

[0048] E. Retract the cylinder pin 6, the bottom drive sprocket 1 and the top drive sprocket 5 rotate counterclockwise, driving the plug-in pin slider 7 to move to the arm pin 2 position at the root of the fourth arm 12, and the fourth arm 12 is extended according to the above-mentioned fifth arm 13 extension steps, and the remaining telescopic arms are also extended according to the fifth arm 13 extension steps, thereby achieving the extension of all telescopic arms ( Figure 4 ), that is, the fifth arm 13, the fourth arm 12, the third arm 11, and the second arm 10 are extended in sequence. After all telescopic arms are extended, the plug-in pin slider 7 is driven to move to the initial state through the bottom drive sprocket 1 and the top drive sprocket 5.

[0049] When the telescopic arm is retracted, the retracting action includes the following steps:

[0050] A. Retract the cylinder pin 6 to unlock, the bottom drive sprocket 1 and the top drive sprocket 5 rotate clockwise, and the plug-in pin slider 7 moves to the arm pin 2 position at the root of the second arm 10 ( Figure 4 );

[0051] B. Extend the cylinder pin 6 to lock the telescopic arm chain 3 with the second arm section 10, and pull down the arm pin 2 at the root of the second arm section 10;

[0052] C. The bottom drive sprocket 1 and the top drive sprocket 5 rotate counterclockwise, and the telescopic arm chain 3 drives the second arm 10 to retract. When the arm pin 2 of the second arm 10 is aligned with the arm pin hole at the root of the basic arm 9, the movement stops ( Figure 5 );

[0053] D. The arm pin 2 at the root of the second arm 10 extends to lock the second arm 10 with the basic arm 9;

[0054] E. The remaining telescopic arms follow the retraction steps of the second arm 10 to achieve the retraction of all telescopic arms ( Figure 1 ), that is, the second section arm 10, the third section arm 11, the fourth section arm 12, and the fifth section arm 13 are extended in sequence. After all telescopic arms are retracted, the plug-in pin slider 7 is driven to move to the initial state through the bottom drive sprocket 1 and the top drive sprocket 5.

[0055] 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 crane telescopic arm latch device with a hydraulic motor driving a sprocket chain mechanism, characterized in that: include: A locking device, a hydraulic motor, a rotating device and a supporting device, wherein the telescopic arm of the crane comprises a basic arm (9) and a plurality of telescopic arms, the root of each telescopic arm is provided with an arm pin (2) for locking and connecting with an adjacent telescopic arm; the supporting device is connected to the root of the basic arm (9), the rotating device is mounted on the supporting device, the locking device is connected to the rotating device, the hydraulic motor is connected to the rotating device and is used to drive the rotating device to rotate, the rotating device is used to drive the locking device to move to each telescopic arm, and the locking device is used to realize the locking connection between the rotating device and the telescopic arm. After the locking connection, the rotating device is driven by the hydraulic motor to drive the telescopic arm to extend or retract.

2. The crane telescopic arm latch device with a hydraulic motor driving a sprocket chain mechanism according to claim 1, characterized in that: The locking device comprises a cylinder pin (6) and a plug-in pin slider (7), wherein the plug-in pin slider (7) is connected to the rotating device, and the cylinder pin (6) is connected to the plug-in pin slider (7), and the rotating device and the telescopic arm are locked or unlocked by extending or retracting the cylinder pin (6).

3. The crane telescopic arm latch device with a hydraulic motor driving a sprocket chain mechanism according to claim 2, characterized in that: The rotating device comprises a driving mechanism and a guide rail (4), wherein the guide rail (4) is mounted on a supporting device, the plug-in pin slider (7) is slidably connected to the guide rail (4), and the driving mechanism is connected to the plug-in pin slider (7) and is used to drive the plug-in pin slider (7) to move along the guide rail (4).

4. The crane telescopic arm latch device with a hydraulic motor driving a sprocket chain mechanism according to claim 3, characterized in that: The driving mechanism comprises a bottom driving sprocket (1), a telescopic arm chain (3) and a top driving sprocket (5); the bottom driving sprocket (1) is connected to the bottom of the supporting device, the top driving sprocket (5) is connected to the top of the supporting device, the telescopic arm chain (3) bypasses the bottom driving sprocket (1) and the top driving sprocket (5) and is connected to both sides of a plug-in pin slider (7); and the output end of the hydraulic motor is connected to the bottom driving sprocket (1).

5. The crane telescopic arm latch device with a hydraulic motor driving a sprocket chain mechanism according to claim 3, characterized in that: The guide rail (4) is parallel to the telescopic direction of the telescopic arm.

6. The crane telescopic arm latch device of the hydraulic motor driven sprocket chain mechanism according to claim 1, 3 or 4, characterized in that: The supporting device adopts a supporting frame (8).

Images