Hoist lifting device for a dynamic compactor

Abstract

The application discloses a hoist lifting device for a dynamic compactor, and relates to the field of dynamic compaction equipment. The hoist lifting device comprises a bottom support, a winding drum assembly, a driving main shaft, a clutch assembly and two driving assemblies. The two driving assemblies are arranged on the two axial sides of the winding drum assembly. On the one hand, the driving assemblies are arranged on the horizontal side of the winding drum assembly, so that the height of the whole machine can be reduced, the gravity center can be lowered, and the stability of lifting can be improved. On the other hand, the driving main shaft of the application cancels the traditional through shaft design, and two half shafts are connected with the two driving assemblies one by one. Then, the power transmission between the half shafts and the winding drum assembly is controlled through the clutch assembly. According to the requirements of different stages such as pulling the hammer, lifting and releasing the hammer, one driving assembly can be started to work or the two driving assemblies can work together, so that the flexibility is high.

Description

Technical Field

[0001] This application relates to the field of dynamic compaction equipment, and more particularly to a winch lifting device for a dynamic compaction machine. Background Technology

[0002] The dynamic compaction machine is an essential piece of engineering equipment for tamping operations, and the winch lifting device is the core of the dynamic compaction machine. The winch lifting device lifts the tamping hammer to a predetermined height and releases the tamping hammer to compact the ground.

[0003] Existing winch lifting devices, such as the mechanical-hydraulic combined winch device disclosed in patent CN202558518U, have the following problems: 1. The hydraulic motor reducer of this patent is arranged parallel to one side of the winch mechanism and located below the drum, resulting in an excessively high overall height, which is not conducive to transportation and assembly, and the high center of gravity leads to poor stability; 2. The hydraulic motor reducers of this patent are all synchronously driven by large gears. The hammer raising and lowering process of the dynamic compaction machine cannot be driven by a single hydraulic motor reducer, which cannot better meet the operational needs of the dynamic compaction machine for hammer pulling and lifting. In addition, the gear transmission often results in broken teeth, and the replacement of the large gear is difficult and costly. Utility Model Content

[0004] This application provides a winch lifting device for a dynamic compaction machine, which can lower the center of gravity to improve stability and can flexibly configure the power as needed.

[0005] This application provides a winch lifting device for a dynamic compaction machine, including a bottom support, a drum assembly, a drive shaft, a clutch assembly, and two drive assemblies;

[0006] The drum assembly is mounted on the bottom support; the drive spindle includes two half shafts, which are respectively mounted on both sides of the drum assembly along the axial direction of the drum assembly. One end of the half shaft is connected to the drum assembly through a clutch assembly, and the other end of the half shaft is rotatably mounted on the bottom support.

[0007] Two drive assemblies are respectively arranged on both sides of the drum assembly along the axial direction of the drum assembly. The two drive assemblies are connected to the two half shafts one by one, and drive the half shafts and the drum assembly to rotate through the drive assemblies.

[0008] Preferably, the drum assembly includes a drum rotatably mounted on a bottom support; annular sleeves are provided at both axial ends of the drum; a clutch assembly is connected to the half shaft and can be radially tightened between the half shaft and the inner circumference of the annular sleeves; a first bearing is provided inside the drum, and one end of the half shaft is connected to the first bearing.

[0009] Preferably, a plurality of first bearings are spaced apart along the axial direction of the half shaft inside the drum, the half shaft passes through the inner ring of the plurality of first bearings, and the outer ring of the first bearings is connected to the inner circumference of the drum.

[0010] Preferably, a first shoulder is provided inside the drum, and a second shoulder is provided on the half shaft. Along the axial direction of the half shaft, the first bearing is located between the first shoulder and the second shoulder.

[0011] Preferably, a third shoulder is provided inside the drum, and a limit baffle is detachably provided on the drum, with the first bearing located between the third shoulder and the limit baffle.

[0012] Preferably, the drum assembly further includes a rope pressing mechanism disposed on the bottom support for pressing the wire rope on the drum; the rope pressing mechanism includes a swing frame, a rope pressing wheel and a rope pressing drive cylinder, one end of the swing frame is hinged to the bottom support, and the rope pressing wheel is rotatably connected to the other end of the swing frame; the two ends of the rope pressing drive cylinder are respectively hinged to the bottom support and the swing frame for driving the rope pressing wheel to move closer to or away from the drum.

[0013] Preferably, it also includes a disc brake assembly, which is connected to the drum and used for braking the drum; the disc brake assembly includes a hydraulic direct-acting brake and a disc brake disc, the hydraulic direct-acting brake is disposed on the bottom support and used to clamp the disc brake disc; the disc brake disc is coaxially fixed on the outer circumference of the drum.

[0014] Preferably, the clutch assembly is configured as a hydraulically driven internally expanding clutch assembly, which is keyed to the half-shaft.

[0015] Preferably, the other end of the half-shaft is rotatably mounted on the bottom support via a second bearing.

[0016] Preferably, the drive assembly includes a hydraulic motor and a reducer; the output end of the hydraulic motor is connected to the input end of the reducer, the reducer is mounted on the bottom support, and the output end of the reducer is connected to the half-shaft key.

[0017] The hoisting device of this application has at least the following beneficial effects:

[0018] The hoisting device of this application includes a bottom support, a drum assembly, a drive spindle, a clutch assembly, and two drive assemblies. The two drive assemblies are respectively arranged on both axial sides of the drum assembly. On the one hand, the drive assemblies are arranged on the horizontal side of the drum assembly, which can reduce the overall height of the machine and lower the center of gravity to improve lifting stability. On the other hand, the drive spindle of this application eliminates the traditional through-shaft design and adopts two half-shafts that are connected to the two drive assemblies one by one. The power transmission between the half-shafts and the drum assembly is controlled by the clutch assembly. It can start one drive assembly to work alone or both drive assemblies to work together according to the needs of different stages such as hammer pulling, lifting, and hammer releasing, which is highly flexible. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0020] Figure 1 This is an isometric drawing of the hoisting device of this application;

[0021] Figure 2 This is a top view of the hoisting device of this application;

[0022] Figure 3 yes Figure 2 AA diagram in the image;

[0023] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0024] The annotations in the attached figures are explained as follows:

[0025] 100. Bottom support;

[0026] 200. Drum assembly; 210. Drum; 211. Annular sleeve; 212. First shoulder; 213. Third shoulder; 220. First bearing; 230. Limiting baffle; 240. Rope pressing mechanism; 241. Swing frame; 242. Rope pressing wheel; 243. Rope pressing drive cylinder; 250. Second bearing;

[0027] 300. Drive spindle; 310. Half shaft; 311. Second shoulder;

[0028] 400. Clutch assembly;

[0029] 500. Drive assembly; 510. Hydraulic motor; 520. Reducer;

[0030] 600. Disc brake assembly; 610. Hydraulic direct-acting brake; 620. Disc brake disc. Detailed Implementation

[0031] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0033] like Figure 1 As shown, this embodiment discloses a winch lifting device for a dynamic compaction machine. The winch lifting device includes a bottom support 100, a drum assembly 200, a drive main shaft 300, a clutch assembly 400, and two drive assemblies 500.

[0034] like Figure 1 As shown, the bottom support 100 is fixedly installed on the ground as the mounting base for each component.

[0035] like Figure 2 As shown, the drum assembly 200 is rotatably positioned in the middle of the bottom support 100, and the tamping hammer is lifted and lowered by rotating the drum assembly 200.

[0036] like Figure 3 As shown, in this embodiment, the drum assembly 200 includes a drum 210, which is rotatably mounted on the bottom support 100, and the axial direction of the drum 210 is horizontal. A wire rope (not shown) has its fixed end connected to the drum 210 and is wound around it. The free end of the wire rope is connected to a rammer (not shown). The rotation of the drum 210 enables the winding and unwinding of the wire rope, thereby lowering and raising the rammer. The drum 210 has annular sleeves 211 at both ends in the axial direction. These sleeves engage with a clutch assembly 400. The clutch assembly 400 tightens or loosens along the radial direction of the drum 210, thereby transmitting power from the half-shaft 310 to the drum 210 or disconnecting power between the half-shaft 310 and the drum 210. The annular sleeves 211 and the drum 210 can be integrally formed.

[0037] like Figure 1 As shown, in some preferred embodiments, the drum assembly 200 further includes a rope pressing mechanism 240 for pressing the wire rope onto the drum 210.

[0038] like Figure 1As shown, the rope pressing mechanism 240 includes a swing frame 241, a rope pressing wheel 242, and a rope pressing drive cylinder 243. The swing frame 241 is located on the horizontal side of the drum 210 along the radial direction of the drum 210, and one end of the swing frame 241 is hinged to the bottom support 100. The rope pressing wheel 242 is rotatably connected to the other end of the swing frame 241, and the axial direction of the rope pressing wheel 242 is parallel to the axial direction of the drum 210. The two ends of the rope pressing drive cylinder 243 are respectively hinged to the bottom support 100 and the swing frame 241. When the rope pressing drive cylinder 243 extends, the rope pressing wheel 242 faces the outer circumference of the drum 210 and presses the wire rope. When the rope pressing drive cylinder 243 retracts, the rope pressing wheel 242 moves away from the outer circumference of the drum 210 and releases the wire rope. In this embodiment, during the winding and unwinding of the wire rope, the pressure wheel 242 always presses down on the wire rope, so that the wire rope fits into the rope groove of the drum 210, thus preventing the rope from becoming tangled and unable to work.

[0039] like Figure 3 As shown, the drive spindle 300 includes two cylindrical half-shafts 310. The two half-shafts 310 are located at opposite axial ends of the drum 210. One end of each half-shaft 310 is coaxially inserted into the interior of the drum 210. The half-shafts 310 are rotatably connected to the interior of the drum 210 via a first bearing 220. Specifically, the half-shafts 310 coaxially pass through the inner ring of the first bearing 220, while the outer ring of the first bearing 220 contacts or connects to the interior of the drum 210. The other end of each half-shaft 310 is rotatably mounted on the bottom support 100 via a second bearing 250 mounted on the bottom support 100.

[0040] like Figure 4 As shown, in some preferred embodiments, there are multiple first bearings 220, which are arranged axially along the half-shaft 310 and located between the half-shaft 310 and the drum 210. In this embodiment, there are two first bearings 220. By setting two or more first bearings 220, the stability of the half-shaft 310 is ensured.

[0041] like Figure 4 As shown, in order to limit the first bearing 220 inside the drum 210, this embodiment provides the following limiting structure for the two first bearings 220 disposed inside the drum 210.

[0042] The first limiting structure, such as Figure 4As shown: A first shoulder 212 is provided inside the drum 210, and a second shoulder 311 is provided on the half shaft 310. Along the axial direction of the half shaft 310, a first bearing 220 is provided between the first shoulder 212 and the second shoulder 311, and the two axial end faces of the first bearing 220 are respectively in contact with the first shoulder 212 and the second shoulder 311. Specifically, the outer ring end face of the first bearing 220 is in contact with the first shoulder 212, and the inner ring end face of the first bearing 220 is in contact with the second shoulder 311. The first shoulder 212 and the second shoulder 311 restrict the position of the first bearing 220 in the axial direction of the half shaft 310.

[0043] The second limiting structure, such as Figure 4 As shown: A third shoulder 213 is provided inside the drum 210. A limit baffle 230 is detachably provided at the axial end of the drum 210. Along the axial direction of the half shaft 310, the second first bearing 220 is located between the third shoulder 213 and the limit baffle 230. Specifically, the axial end face of the outer ring of the second first bearing 220 is in contact with the third shoulder 213 and abuts against the limit baffle 230. The third shoulder 213 and the limit baffle 230 restrict the position of the second first bearing 220 in the axial direction of the half shaft 310.

[0044] like Figure 1 As shown, in this embodiment, the hoisting device further includes a disc brake assembly 600, which is used to brake the drum 210. The disc brake includes a hydraulic direct-acting brake 610 and a disc brake disc 620. The hydraulic direct-acting brake 610 is disposed on the bottom support 100 and is used to clamp the disc brake disc 620 from both sides along the axial direction of the drum 210. The disc brake disc 620 is coaxially fixedly disposed on the outer circumference of the drum 210. Its working principle is as follows: under the drive of an external hydraulic system, the hydraulic direct-acting brake 610 clamps the disc brake disc 620 from both sides along the axial direction of the drum 210. Since the disc brake disc 620 is coaxially fixedly connected to the drum 210, braking of the drum 210 can be achieved. In some preferred embodiments, there are two disc brake assemblies 600, which are respectively disposed at both ends of the drum 210 along the axial direction of the drum 210. After the freefall hammer action is completed, the hydraulic direct-acting brake 610 clamps the disc brake 620, causing the drum 210 to stop rotating, thus preventing the wire rope from continuing to descend and becoming loose, which would result in the wire rope on the drum 210 becoming tangled and unable to operate.

[0045] like Figure 4As shown, the clutch assembly 400 is configured as an existing internal expansion clutch assembly. The internal expansion clutch assembly is connected between the half-shaft 310 and the annular sleeve 211 of the drum 210. The internal expansion clutch assembly can be tightened or loosened in the radial direction of the drum 210 by hydraulic drive. When it is necessary to transmit power to the half-shaft 310, the friction band of the internal expansion clutch assembly is tightened on the inner peripheral wall of the annular sleeve 211. The friction force enables the internal expansion clutch assembly and the drum 210 to rotate synchronously. Conversely, when it is not necessary to transmit power to the half-shaft 310, under the drive of the external hydraulic system, the internal expansion clutch assembly disengages from the annular sleeve 211, thereby disconnecting the power transmission path.

[0046] like Figure 4 As shown, the clutch assembly 400 has a shaft hole through which the half-shaft 310 passes. Keyways are provided on both the inner and outer peripheral walls of the shaft hole and the half-shaft 310. Flat keys are respectively positioned within the keyways of the shaft hole and the half-shaft 310, thus achieving a keyed connection between the clutch assembly 400 and the half-shaft 310. In this embodiment, the half-shaft 310 and the clutch assembly 400 are connected by a flat key. This keyed connection ensures stable torque transmission. When the hammer needs to be lifted, power is transmitted through the clutch assembly 400. When releasing the hammer, the clutch assembly 400 disengages from the drum 210, allowing the hammer to fall freely. At this time, the drive assembly 500 does not participate in the disengagement action, thus preventing impact and idle wear on the drive assembly 500.

[0047] like Figure 3 As shown, there are two drive assemblies 500, which are symmetrically arranged at both ends of the drum 210 about the vertical plane. Each drive assembly 500 includes a hydraulic motor 510 and a reducer 520. The hydraulic motor 510 and the reducer 520 are both mounted on the bottom support 100. The hydraulic motor 510 and the reducer 520 are arranged sequentially along the axial direction of the drum 210. The output end of the hydraulic motor 510 is connected to the input end of the reducer 520, and the output end of the reducer 520 is connected to a half-shaft 310 via a key.

[0048] When it is necessary to control the rotation of the half-shaft 310, the hydraulic motor 510 works, and the power of the hydraulic motor 510 is transmitted through the reducer 520 to drive the half-shaft 310 to rotate.

[0049] The working principle of the hoisting device in this embodiment is as follows:

[0050] Hammer Removal Stage: After the tamping hammer is driven into the ground, the process of removing the hammer from the mud requires a greater pulling force. At this time, the two drive assemblies 500 work together, and the clutch assemblies 400 on both sides of the drum 210 are connected to the half shaft 310 and the drum 210 respectively to transmit power. The two drive assemblies 500 provide a greater lifting force to pull the tamping hammer out of the pit.

[0051] Lifting stage: After the hammer is pulled out of the pit, the adhesion resistance of the pit to the hammer disappears, and the lifting force of the hook decreases. The state of the hammer (free lifting state) can be judged by detecting the pressure change value of the detection system. At this time, the external hydraulic system controls a clutch assembly 400 to release the drum 210 through the valve group, and the drive assembly 500 located on the same side as the clutch assembly 400 also stops working accordingly. This allows the hydraulic system to concentrate pressure to provide power to the other drive assembly 500, realizing high-speed lifting of the hammer on one side.

[0052] Hammer drop phase: After the hammer is raised to the predetermined height, a clutch assembly 400 in working state releases the drum 210, and the drum 210 is unrestrained, thus allowing the hammer to fall freely. After the hammer falls freely, the hydraulic direct-acting brake 610 clamps the disc brake 620, stopping the drum 210 from continuing to rotate, preventing the wire rope from becoming loose due to the wire rope continuing to descend, which would cause the wire rope on the drum 210 to become tangled and unable to work.

[0053] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A winch lifting device for a dynamic compaction machine, characterized in that, It includes a bottom support (100), a drum assembly (200), a drive spindle (300), a clutch assembly (400), and two drive assemblies (500); The drum assembly (200) is mounted on the bottom support (100); The drive spindle (300) includes two half shafts (310). The two half shafts (310) are respectively arranged on both sides of the drum assembly (200) along the axial direction of the drum assembly (200). One end of the half shaft (310) is connected to the drum assembly (200) through the clutch assembly (400), and the other end of the half shaft (310) is rotatably mounted on the bottom support (100). Two drive assemblies (500) are respectively arranged on both sides of the drum assembly (200) along the axial direction of the drum assembly (200). The two drive assemblies (500) are connected to the two half shafts (310) one by one, and drive the half shafts (310) and the drum assembly (200) to rotate through the drive assemblies (500).

2. The hoisting device according to claim 1, characterized in that, The drum assembly (200) includes a drum (210) rotatably mounted on a bottom support (100); both axial ends of the drum (210) are provided with annular sleeves (211); the clutch assembly (400) is connected to the half shaft (310) and can be radially braced between the half shaft (310) and the inner circumference of the annular sleeve (211); A first bearing (220) is provided inside the drum (210), and one end of the half shaft (310) is connected to the first bearing (220).

3. The hoisting device according to claim 2, characterized in that, Multiple first bearings (220) are spaced apart along the axial direction of the half shaft (310) inside the drum (210). The half shaft (310) passes through the inner ring of the multiple first bearings (220), and the outer ring of the first bearings (220) is connected to the inner circumference of the drum (210).

4. The hoisting device according to claim 3, characterized in that, A first shoulder (212) is provided inside the drum (210), and a second shoulder (311) is provided on the half shaft (310). Along the axial direction of the half shaft (310), a first bearing (220) is located between the first shoulder (212) and the second shoulder (311).

5. The hoisting device according to claim 3, characterized in that, A third shoulder (213) is provided inside the drum (210), and a limit baffle (230) is detachably provided on the drum (210). The first bearing (220) is located between the third shoulder (213) and the limit baffle (230).

6. The hoisting device according to any one of claims 2 to 5, characterized in that, The drum assembly (200) also includes a rope clamping mechanism (240) disposed on the bottom support (100) for clamping the wire rope on the drum (210); The rope pressing mechanism (240) includes a swing frame (241), a rope pressing wheel (242), and a rope pressing drive cylinder (243). One end of the swing frame (241) is hinged to the bottom support (100), and the rope pressing wheel (242) is rotatably connected to the other end of the swing frame (241). The two ends of the rope pressing drive cylinder (243) are respectively hinged to the bottom support (100) and the swing frame (241) to drive the rope pressing wheel (242) to move closer to or away from the drum (210).

7. The hoisting device according to any one of claims 2 to 5, characterized in that, It also includes a disc brake assembly (600), which is connected to the drum (210) for braking the drum (210); The disc brake includes a hydraulic direct-acting brake (610) and a disc brake disc (620). The hydraulic direct-acting brake (610) is mounted on the bottom support (100) and is used to clamp the disc brake disc (620). The disc brake disc (620) is coaxially fixed on the outer circumference of the drum (210).

8. The hoisting device according to claim 1, characterized in that, The clutch assembly (400) is configured as a hydraulically driven internally expanding clutch assembly, which is keyed to the half-shaft (310).

9. The hoisting device according to claim 1, characterized in that, The other end of the half shaft (310) is rotatably mounted on the bottom support (100) via the second bearing (250).

10. The hoisting device according to claim 1, characterized in that, The drive assembly (500) includes a hydraulic motor (510) and a reducer (520); the output end of the hydraulic motor (510) is connected to the input end of the reducer (520), the reducer (520) is mounted on the bottom support (100), and the output end of the reducer (520) is keyed to the half shaft (310).

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