A speed-adjustable hydraulic hoist with safety protection function

Abstract

The present invention relates to the technical field of hydraulic hoists, and specifically provides an adjustable speed hydraulic hoist with a safety protection function, comprising a hoisting track, on which a hydraulic hoist is slidably arranged, the speed of the hydraulic hoist on the hoisting track being adjustable, the hydraulic hoist being connected to a hook via a steel cable, a first connecting block and a second connecting block, the second connecting block being rotatable relative to the first connecting block, and an elastic member being arranged at the rotating connection, so that the second connecting block can rotate relative to the first connecting block when the center of gravity of the second connecting block changes, thereby converting the potential energy of the swing of the hook into the kinetic energy stored by the elastic member, thereby effectively reducing the swing amplitude of the hook, reducing the wear of the steel cable and the hook, and avoiding the occurrence of safety accidents.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic hoists, in particular to a speed-adjustable hydraulic hoist with a safety protection function. Background Art

[0002] A hydraulic hoist is a lifting device that uses a hydraulic system as its power source. It is used to lift, drag and move heavy objects in industries such as industry, construction, and marine engineering.

[0003] For example, Chinese patent CN115849183B discloses a chain hydraulic hoist braking device, which includes a quantitative self-unloading pressure-type single-drive distribution mechanism, a self-locking hydraulic drive mechanism, a self-locking hydraulic lifting mechanism and a hoisting bearing mechanism. The driving hydraulic pressure itself is used to control locking and unlocking, and a quantitative self-unloading pressure-type single-drive distribution mechanism is used to achieve rapid switching between two axial directions. In addition, a quantitative pressure relief method is used during the switching process to ensure that a group of motors that are not in the driving state will automatically lock.

[0004] However, the hydraulic hoist brake device in the above scheme will cause the cargo and the steel cable to swing at the moment of locking and unlocking. This swing will aggravate the wear of the steel cable and the hook, and it is also easy for the cargo to collide with other objects and cause economic losses. If the swing is too large, it may even cause unhooking. Summary of the invention

[0005] Based on this, it is necessary to provide an adjustable speed hydraulic hoist with a safety protection function to address the problem that the current hydraulic hoist causes the cargo and the steel cable to swing when locked or unlocked, thereby aggravating the wear of the steel cable and the hook.

[0006] The above purpose is achieved through the following technical solutions:

[0007] An adjustable speed hydraulic hoist with safety protection function, comprising:

[0008] A hoisting track, on which a hydraulic hoist is slidably arranged, and the hydraulic hoist can move along the hoisting track;

[0009] A hook, wherein the hook is connected to the hydraulic hoist through a steel cable, and a buffer component is provided between the hook and the steel cable;

[0010] The buffer assembly comprises a first connecting block and a second connecting block, one end of the first connecting block is fixedly connected to the steel cable, the other end of the first connecting block is rotatably connected to the second connecting block and an elastic member is provided at the rotatable connection, the middle part of the connecting shaft of the hook is ball-connected to the second connecting block, and the second connecting block is provided with a counterweight block that can move in a direction perpendicular to the length of the hoisting track;

[0011] A transmission assembly, wherein the transmission assembly is configured as follows:

[0012] When the hook swings, it pushes the counterweight block to move so as to change the center of gravity of the second connecting block, and the hook drives the second connecting block to rotate so as to store force on the elastic member.

[0013] Furthermore, the transmission assembly includes a double-circle rotating ring, a spiral rod and a sliding frame. The double-circle rotating ring is rotatably connected in the second connecting block and is coaxial with the connecting shaft of the hook. The sliding frame is meshed with the outer periphery of the inner ring of the double-circle rotating ring. The sliding frame can slide along the length direction of the lifting track to drive the rotating ring to rotate. A transmission ring is coaxially arranged below the inner ring of the double-circle rotating ring. The spiral rod is spirally connected to the counterweight block, and one end of the spiral rod is meshed with the transmission ring. A transmission wheel is rotatably arranged in the second connecting block, and the transmission wheel is meshed with the inner periphery of the outer ring of the double-circle rotating ring and the outer periphery of the transmission ring at the same time.

[0014] Furthermore, two abutment rods distributed along the length direction of the lifting track are fixedly provided on the sliding frame, the connecting shaft of the hook is located between the two abutment rods, and an abutment plate is hinged on one end of the two abutment rods close to the connecting shaft of the hook.

[0015] Furthermore, the first connection block is symmetrically provided with one-way snap rings, and the two one-way snap rings are respectively provided with one-way teeth in the same direction, and a clamping plate is fixedly provided at the rotation connection of the second connection block, and when the hook swings, the one-way snap ring cooperates with the clamping plate to limit the release of the elastic member;

[0016] When the hook stops swinging, the one-way clamping ring is separated from the clamping plate to release the restriction on the elastic member.

[0017] Furthermore, a first telescopic rod is provided on the first connecting block, one end of the first telescopic rod is fixed on the first connecting block, and the other end of the first telescopic rod is fixedly provided on the outer periphery of the one-way clamping ring, and the first telescopic rod can drive the one-way clamping ring to approach or move away from the clamping plate.

[0018] Furthermore, clamping plates are symmetrically arranged in the first connecting block, and the clamping plates can move along the length direction of the lifting rail to clamp or move away from the connecting shaft of the hook. When the hook stops swinging, the clamping plates clamp the connecting shaft of the hook and the elastic member is released.

[0019] Furthermore, a second telescopic rod is provided in the first connecting block, one end of the second telescopic rod is fixedly connected in the first connecting block, and the other end of the second telescopic rod is fixedly connected to the clamping plate. The extension and retraction of the second telescopic rod can drive the clamping plate to clamp or move away from the connecting axis of the hook.

[0020] Furthermore, there are multiple steel cables, and the multiple steel cables are parallel to each other.

[0021] Furthermore, a stabilizing plate is provided between the steel cable and the first connecting block.

[0022] Furthermore, the hook is provided with an anti-dropping device.

[0023] The beneficial effects of the present invention are:

[0024] The present invention provides a first connecting block and a second connecting block that can rotate relatively and an elastic member is provided at the rotating connection. When the center of gravity of the second connecting block changes, the second connecting block can rotate relative to the first connecting block, thereby converting the potential energy of the swing of the hook into kinetic energy stored in the elastic member, thereby effectively reducing the swing amplitude of the hook, reducing the wear of the steel cable and the hook, and avoiding the occurrence of safety accidents.

[0025] The present invention provides two one-way clamping rings capable of limiting the one-way rotation of the second connecting block, thereby preventing the elastic member from being released during the process of the second rotating ring storing force on the elastic member.

[0026] The present invention enables the counterweight block to move in a direction perpendicular to the length of the hoisting track, so that the second connecting block can be reused after being reset.

[0027] The present invention provides a clamping plate capable of clamping the hook connecting shaft so that the elastic member can avoid affecting the hook when released.

[0028] The invention provides an anti-drop buckle on the hook to prevent the heavy object from falling off the hook. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of an adjustable speed hydraulic hoist with a safety protection function provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of a first connecting block, a second connecting block and a hook of an adjustable speed hydraulic hoist with a safety protection function provided by an embodiment of the present invention;

[0031] Figure 3 for Figure 2 A cross-sectional view along AA of an adjustable speed hydraulic hoist with a safety protection function provided in an embodiment;

[0032] Figure 4 An exploded view of a first connecting block, a second connecting block and a hook of an adjustable speed hydraulic hoist with a safety protection function provided by an embodiment of the present invention;

[0033] Figure 5A schematic diagram of a second connecting block and a hook of a speed-adjustable hydraulic hoist with a safety protection function provided by an embodiment of the present invention;

[0034] Figure 6 for Figure 5 A cross-sectional view along BB of an adjustable speed hydraulic hoist with a safety protection function provided in an embodiment;

[0035] Figure 7 for Figure 5 An axonometric view of a speed-adjustable hydraulic hoist with a safety protection function provided in an embodiment of the present invention cut along CC;

[0036] Figure 8 A schematic structural diagram of a double-circle rotating ring of a speed-adjustable hydraulic hoist with a safety protection function provided by an embodiment of the present invention;

[0037] Fig. 9 A side view of a transmission ring of a speed-adjustable hydraulic hoist with a safety protection function provided by an embodiment of the present invention;

[0038] Fig.10 A schematic diagram of the internal structure of a second connecting block of an adjustable speed hydraulic hoist with a safety protection function provided in one embodiment of the present invention.

[0039] in:

[0040] 100, hoisting rail; 110, driving motor; 120, sliding part;

[0041] 200, hydraulic hoist; 210, steel cable; 220, stabilizing plate;

[0042] 300, first connecting block; 310, first telescopic rod; 311, one-way clamp; 320, second telescopic rod; 321, clamping plate; 330, elastic member;

[0043] 400, second connecting block; 410, clamping plate; 420, limiting plate; 421, rotating groove; 430, ring sleeve; 440, rotating shaft; 450, counterweight block; 460, ball joint groove; 470, sliding groove;

[0044] 500, double-circle rotating ring; 510, inner ring; 511, gear ring; 520, outer ring; 530, transmission wheel; 540, transmission ring; 541, conical surface; 542, cylindrical surface; 550, spiral rod; 560, sliding frame; 561, rack; 562, abutment rod; 563, abutment plate;

[0045] 600, hook; 610, connecting shaft; 611, articulated ball; 620, anti-dropping buckle. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] Refer to the following Figure 1-Figure 10 The invention is to describe an adjustable speed hydraulic hoist with a safety protection function.

[0050] A speed-adjustable hydraulic hoist with a safety protection function is suitable for lifting and transporting heavy objects, comprising a hoisting track 100, on which a hydraulic hoist 200 is slidably arranged, the hydraulic hoist 200 can move along the hoisting track 100, a driving motor 110 and a sliding member 120 are arranged on the hoisting track 100, the sliding member 120 is connected to the hydraulic hoist 200, the driving motor 110 drives the sliding member 120 to move along the hoisting track 100, and the driving motor 110 can adjust the speed, so that the sliding member 120 drives the hydraulic hoist 200 to move along the hoisting track 100, a hook 600 is connected to the hydraulic hoist 200 through a steel cable 210, the hook 600 is used to connect heavy objects, a buffer component is arranged between the hook 600 and the steel cable 210, and the buffer component is used to reduce the swing of the hook 600.

[0051] It is understandable that when the hydraulic hoist 200 is transporting heavy objects and needs to stop suddenly or accelerate in an emergency, it will cause the hook 600 to swing along the length direction of the lifting rail 100 (similar to the swinging form of a pendulum). The hook 600 will be worn greatly during the swinging. In severe cases, the large swinging may cause the heavy object to become unhooked and cause a safety accident. Therefore, a buffer assembly is arranged between the steel cable 210 and the hook 600 to reduce the swinging of the hook 600, thereby reducing the wear of the hook 600 and avoiding the occurrence of safety accidents.

[0052] The buffer assembly includes a first connecting block 300 and a second connecting block 400, one end of the first connecting block 300 is fixedly connected to the steel cable 210, the other end of the first connecting block 300 is rotatably connected to the second connecting block 400, and an elastic member 330 is provided at the rotatable connection between the first connecting block 300 and the second connecting block 400, one end of the elastic member 330 is fixedly connected to the first connecting block 300, and the other end of the elastic member 330 is fixedly connected to the second connecting block 400, and the elastic member 330 can store force when the second connecting block 400 rotates relative to the first connecting block 300. The second connection block 400 is provided with a counterweight block 450 that can move in a direction perpendicular to the length of the hoisting track 100. At the same time, a hinge ball 611 is fixedly provided in the middle part of the connecting shaft 610 of the hook 600, and a ball connection groove 460 is provided on the second connection block 400. The hinge ball 611 in the middle of the connecting shaft 610 of the hook 600 is connected in the ball connection groove 460. The second connection block 400 is also provided with a transmission component, and the transmission component is configured as follows: when the hook 600 swings, the transmission component can push the counterweight block 450 to move, so that the second connection block 400 The center of gravity shifts, and when the hook 600 drives the second connecting block 400 to swing, the center of gravity of the second connecting block 400 changes, so that the swinging direction of the hook 600 shifts and gradually begins to swing along an elliptical trajectory. At the same time, the second connecting block 400 begins to rotate under the action of the shifted center of gravity and the hook 600. The second connecting block 400 rotates relative to the first connecting block 300 to store force on the elastic member 330, and gradually converts the potential energy of the swing of the hook 600 into kinetic energy stored by the elastic member 330. The swing amplitude of the hook 600 gradually decreases, and finally stops swinging.

[0053] It should be noted that the elastic member 330 may be a torsion spring or a coil spring.

[0054] By providing the first connecting block 300 and the second connecting block 400 which can rotate relative to each other and providing an elastic member 330 at the rotating connection, when the center of gravity of the second connecting block 400 changes, the second connecting block 400 can rotate relative to the first connecting block 300, thereby converting the potential energy of the swing of the hook 600 into kinetic energy stored by the elastic member 330, thereby effectively reducing the swing amplitude of the hook 600, reducing the wear of the hook 600, and avoiding the occurrence of safety accidents.

[0055] Specifically, the transmission assembly in this embodiment includes a double-circle rotating ring 500, a spiral rod 550 and a sliding frame 560. The structure of the double-circle rotating ring 500 is as follows: Figure 8 As shown, the double-circle rotating ring 500 includes an inner ring 510 and an outer ring 520, the inner ring 510 is fixedly connected to the outer ring 520, a gear ring 511 is fixedly arranged on the outer circumference of the inner ring 510, the double-circle rotating ring 500 is rotatably arranged in the second connecting block 400, and the double-circle rotating ring 500 is coaxial with the connecting shaft 610 of the hook 600, as shown in FIG. Fig.10 As shown, a ring sleeve 430 is provided in the second connection block 400, and a transmission ring 540 is sleeved on the outer circumference of the ring sleeve 430. At the same time, the inner ring 510 of the double-circle rotating ring 500 is also sleeved on the ring sleeve 430, but the transmission ring 540 is located below the double-circle rotating ring 500. A rack 561 is provided on the sliding frame 560, and the rack 561 is meshed with the gear ring 511 on the inner ring 510 of the double-circle rotating ring 500. The sliding frame 560 can slide along the length direction of the hoisting track 100, thereby driving the double-circle rotating ring 500 to rotate. A transmission wheel 530 is rotatably provided in the second connection block 400, and a rotating shaft 440 is provided in the second connection block 400. The transmission wheel 530 is rotatably connected to the rotating shaft 440, and the transmission wheel 530 is meshed with the inner circumference of the outer ring 520 of the double-circle rotating ring 500 and the outer circumference of the transmission ring 540 at the same time. The screw rod 550 is screwed to the counterweight block 450 . A limit plate 420 is disposed in the second connection block 400 . The limit plate 420 is perpendicular to the second connection block 400 . A rotation groove 421 is formed on the limit plate 420 . The screw rod 550 meshes with the transmission ring 540 after passing through the rotation groove 421 .

[0056] When the hook 600 swings, the connecting shaft 610 of the hook 600 will swing in the opposite direction of the swinging direction of the hook 600, and the connecting shaft 610 will push the sliding frame 560 to slide, and the gear on the sliding frame 560 will drive the double-circle rotating ring 500 to rotate, and the inner circumference of the outer ring 520 of the double-circle rotating ring 500 will drive the transmission wheel 530 to rotate, and the transmission wheel 530 will drive the transmission ring 540 to rotate, and the transmission ring 540 will drive the spiral rod 550 to rotate around its own axis, so that the counterweight block 450 moves in a direction perpendicular to the length of the lifting rail 100, thereby changing the center of gravity position of the second connecting block 400.

[0057] The outer circumference of the transmission ring 540 has two parts, upper and lower. Fig. 9 As shown, the upper portion of the outer periphery of the transmission ring 540 is a conical surface 541, and the lower portion of the transmission ring 540 is a cylindrical surface 542, the cylindrical surface 542 is meshed with the outer periphery of the transmission wheel 530, and the end of the screw rod 550 that meshes with the transmission ring 540 is a conical end, that is, the conical end of the screw rod 550 is meshed with the conical surface 541 of the transmission ring 540, thereby achieving a transmission effect.

[0058] It should be noted that the use of the transmission ring 540 and the double-ring rotating ring 500 to drive the spiral rod 550 to rotate has the following effect: the diameter of the outer ring 520 is larger than that of the inner ring 510, and the outer ring 520 is driven to rotate by the inner ring 510, the outer ring 520 drives the transmission wheel 530, and the transmission wheel 530 drives the transmission ring 540 to drive the spiral rod 550 to rotate. In other words, when the connecting shaft 610 of the hook 600 pushes the sliding frame 560 to slide a very small distance, the outer ring 520 can drive the transmission wheel 530 to drive the transmission ring 540 to rotate a larger angle, so that the spiral rod 550 rotates a large number of circles, so that the counterweight block 450 can move a longer distance, thereby preventing the hook 600 from swinging significantly.

[0059] If the inner ring 510 of the double-circle rotating ring 500 is directly used to drive the transmission ring 540 to rotate, the transmission ring 540 rotates at a smaller angle within the same swinging time of the hook 600, and the transmission ring 540 drives the spiral rod 550 to rotate at a smaller number of circles, which makes the counterweight 450 move a shorter distance. That is, when the hook 600 swings at the same angle, the rotation angle of the transmission ring 540 driven by the outer ring 520 of the double-circle rotating ring 500 is greater than the rotation angle of the transmission ring 540 directly driven by the inner ring 510 of the double circle, so that the counterweight 450 moves a longer distance when the hook 600 swings at a smaller angle at the beginning, so as to convert the swing potential energy of the hook 600 into the kinetic energy of the elastic member 330 in advance, while when the inner ring 510 is driving, the hook 600 needs to swing at a larger angle before the counterweight 450 moves a longer distance.

[0060] More specifically, in order to facilitate the sliding of the sliding frame 560 in the second connecting block 400, as shown in FIG. Fig.10 As shown, a slide groove 470 is provided in the second connecting block 400, and the slide groove 470 extends along the length direction of the lifting rail 100, and the sliding frame 560 is slidably set in the slide groove 470, and two abutment rods 562 distributed along the length direction of the lifting rail 100 are fixedly set on the sliding frame 560, and the connecting shaft 610 of the hook 600 is located between the two abutment rods 562, and the two abutment rods 562 are hinged on one end of the connecting shaft 610 of the hook 600 to have an abutment plate 563, and the abutment plate 563 is close to the connecting shaft 610 of the hook 600. When the hook 600 swings, the connecting shaft 610 of the hook 600 pushes one of the abutment rods 562, and the abutment rod 562 pushes the sliding frame 560 to slide, and the sliding frame 560 drives the double-circle rotating ring 500 to rotate through the rack 561, and the double-circle rotating ring 500 drives the transmission ring 540 to rotate, thereby moving the counterweight block 450 in the second connecting block 400.

[0061] It should be noted that there are two counterweight blocks 450 in the present invention, the two counterweight blocks 450 are symmetrically arranged, and there are also two spiral rods 550. When the transmission ring 540 rotates, the transmission ring 540 drives the two spiral rods 550 to rotate, and the rotation directions of the two spiral rods 550 are opposite so that the two counterweight blocks 450 move in the same direction.

[0062] In a further embodiment, two one-way snap rings 311 are symmetrically arranged in the first connection block 300, and one-way teeth with the same direction are arranged in the two one-way snap rings 311 respectively. A clamping plate 410 is fixedly arranged on the second connection block 400. When the second connection block 400 rotates relative to the first connection block 300, the two one-way snap rings 311 are close to the clamping plate 410. When the clamping plate 410 rotates, it contacts the two one-way snap rings 311. The two one-way snap rings 311 restrict the one-way rotation of the clamping plate 410, that is, restrict the one-way rotation of the second connection block 400. Rotate, thereby preventing the second connecting block 400 from rotating in the opposite direction and releasing the elastic member 330 when the elastic member 330 accumulates force. Only when the hook 600 no longer swings but is in a relatively static state, the two counterweight blocks 450 on the second connecting block 400 are reset, and the two one-way snap rings 311 are disengaged from the contact with the clamping plate 410, thereby releasing the restriction on the second connecting block 400, and the second connecting block 400 rotates in the opposite direction to release the elastic member 330. At this time, releasing the elastic member 330 will not affect the hook 600.

[0063] It should be noted that when the second connection block 400 of the present invention swings in the opposite direction of the hook 600, the rotation direction of the second connection block 400 relative to the first connection block 300 does not change, that is, when the hook 600 swings in the opposite direction, the counterweight block 450 in the second connection block 400 moves in the opposite direction, but the swing direction of the hook 600 is also opposite, so the rotation direction of the second connection block 400 does not change. Therefore, it is only necessary to control the second connection block 400 to rotate in one direction to prevent the elastic member 330 from being released prematurely.

[0064] Specifically, in order to facilitate the movement of the two one-way snap rings 311, two first telescopic rods 310 are arranged on the first connecting block 300, one end of the first telescopic rod 310 is fixed in the first connecting block 300, and the other end of the first telescopic rod 310 is fixed on the one-way snap ring 311. When the first telescopic rod 310 is extended, the one-way snap ring 311 is pushed to contact the clamping plate 410, and when the first telescopic rod 310 is shortened, the one-way snap ring 311 is driven to separate from the clamping plate 410.

[0065] In a further embodiment, two clamping plates 321 are symmetrically arranged in the first connection block 300. The two clamping plates 321 can move along the length direction of the track to clamp or move away from the connecting shaft 610 of the hook 600. When the hook 600 stops swinging from the swinging state and is ready to release the elastic member 330, the two clamping plates 321 can tightly clamp the connecting shaft 610 of the hook 600, thereby preventing the elastic member 330 from affecting the hook 600 during the release process. When the elastic member 330 is completely released, the two clamping plates 321 move away from the connecting shaft 610 of the hook 600 to prepare for releasing the elastic member 330 after the hook 600 swings next time.

[0066] Specifically, two second telescopic rods 320 are arranged in the first connecting block 300, one end of the second telescopic rod 320 is fixed on the first connecting block 300, and the other end of the second telescopic rod 320 is fixedly connected to the clamping plate 321. When the second telescopic rod 320 is extended or retracted, it can drive the clamping plate 321 to clamp and move away from the connecting shaft 610 of the hook 600.

[0067] In a further embodiment, the present invention includes multiple steel cables 210 , and the multiple steel cables 210 are parallel to each other.

[0068] In a further embodiment, a stabilizing plate 220 is fixedly disposed between the steel cable 210 and the first connecting block 300 . The stabilizing plate 220 can stabilize the hook 600 . The stabilizing plate 220 enhances the connection strength between the steel cable 210 and the first connecting block 300 .

[0069] In a further embodiment, an anti-drop buckle 620 is also provided on the hook 600, one end of the anti-drop buckle 620 is rotatably connected to one end of the opening of the hook 600, and a torsion spring is provided at the rotating connection, and the other end of the anti-drop buckle 620 abuts against the other end of the opening of the hook 600. The anti-drop buckle 620 can prevent heavy objects from being detached from the hook.

[0070] The specific working process of the adjustable speed hydraulic hoist with safety protection function provided by the present invention is described in combination with the above embodiments:

[0071] Hoisting:

[0072] The anti-tripping buckle 620 on the hook 600 is opened, and a heavy object is hung on the hook 600. The anti-tripping buckle 620 is reset under the action of the torsion spring to close the opening of the hook 600 to prevent the heavy object from being tripped.

[0073] Speed ​​regulation:

[0074] After the speed of the driving motor 110 and the hydraulic hoist 200 is adjusted, the heavy object is lifted and transported to the designated location.

[0075] When stopping or slowing down suddenly:

[0076] If an emergency situation occurs during the transportation process and the movement of the hydraulic hoist 200 needs to be stopped or slowed down immediately, the hook 600 will still move forward under the action of inertia, and the hook 600 will start to swing. Since the middle part of the connecting shaft 610 of the hook 600 is connected to the second connecting block 400, the connecting shaft 610 of the hook 600 will swing backward, and the connecting shaft 610 of the hook 600 will push the abutment rod 562 on the sliding frame 560, and the abutment rod 562 will push the sliding frame 560 to slide, and the rack 561 on the sliding frame 560 will contact the gear ring 51 of the inner ring 510 of the double-circle rotating ring 500. 1, thereby driving the inner ring 510 of the double-circle rotating ring 500 to rotate. Since the inner ring 510 and the outer ring 520 of the double-circle rotating ring 500 are fixedly connected, the outer ring 520 rotates synchronously. When the outer ring 520 rotates, it drives the transmission wheel 530 to rotate, and the transmission wheel 530 drives the transmission ring 540 to rotate. The conical surface 541 on the upper part of the transmission ring 540 meshes with the conical ends of the two screw rods 550, thereby driving the two screw rods 550 to rotate. The rotation directions of the two screw rods 550 are opposite, and the two screw rods 550 respectively drive the two counterweights 450 to move in the same direction.

[0077] Due to the movement of the two counterweights 450, the center of gravity of the second connecting block 400 changes, thereby changing the original swinging direction of the hook 600. At this time, the hook 600 begins to rotate around an elliptical trajectory, and at the same time, the second connecting block 400 rotates relative to the first connecting block 300. The first telescopic rod 310 on the first connecting block 300 brings a one-way snap ring 311 into contact with the clamping plate 410 on the second connecting block 400, and the elastic member 330 begins to accumulate force. From the time the elastic member 330 begins to accumulate force to before it stops, the one-way snap ring 311 limits the one-way rotation of the second connecting block 400. As the hook 600 rotates After the swinging potential energy is gradually converted into the kinetic energy stored in the elastic member 330, the hook 600 stops swinging, and the second telescopic rod 320 begins to extend to clamp the connecting shaft 610 of the hook 600 with the clamping plate 321. After clamping, the first telescopic rod 310 drives the one-way clamping ring 311 away from the clamping plate 410, and the second connecting block 400 is no longer restricted. The elastic member 330 is released, and the clamping plate can prevent the elastic member 330 from affecting the hook 600 when it is released. After the elastic member 330 is released, the clamping plate is reset under the action of the second telescopic rod 320, thereby preparing for the release of the elastic member 330 after the hook 600 swings next time.

[0078] When starting or accelerating suddenly:

[0079] If an emergency situation occurs during the transportation process and the movement of the hydraulic hoist 200 needs to be started immediately or accelerated, the hook 600 will still move backwards under the action of inertia, and the hook 600 begins to swing. The direction of the swing is opposite to the direction when suddenly stopping or decelerating. In this case, the working order of each structure is the same as when suddenly stopping or decelerating. The difference is that the moving direction of the counterweight block 450 in the second connecting block 400 changes, but the rotation direction of the second connecting block 400 relative to the first connecting block 300 is the same, which will not be elaborated here.

[0080] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An adjustable speed hydraulic hoist with safety protection function, characterized in that: include: A hoisting track, on which a hydraulic hoist is slidably arranged, and the hydraulic hoist can move along the hoisting track; A hook, wherein the hook is connected to the hydraulic hoist through a steel cable, and a buffer component is provided between the hook and the steel cable; The buffer assembly comprises a first connecting block and a second connecting block, one end of the first connecting block is fixedly connected to the steel cable, the other end of the first connecting block is rotatably connected to the second connecting block and an elastic member is provided at the rotatable connection, the middle part of the connecting shaft of the hook is ball-connected to the second connecting block, and the second connecting block is provided with a counterweight block that can move in a direction perpendicular to the length of the hoisting track; A transmission assembly, wherein the transmission assembly is configured as follows: When the hook swings, it pushes the counterweight block to move to change the center of gravity of the second connecting block, and the hook drives the second connecting block to rotate to store force on the elastic member; The transmission assembly comprises a double-circle rotating ring, a spiral rod and a sliding frame, the double-circle rotating ring is rotatably connected in the second connecting block and is coaxial with the connecting shaft of the hook, the sliding frame is meshed with the outer periphery of the inner ring of the double-circle rotating ring, the sliding frame can slide along the length direction of the hoisting track to drive the rotating ring to rotate, a transmission ring is coaxially arranged below the inner ring of the double-circle rotating ring, the spiral rod is spirally connected to the counterweight block, one end of the spiral rod is meshed with the transmission ring, a transmission wheel is rotatably arranged in the second connecting block, and the transmission wheel is meshed with the inner periphery of the outer ring of the double-circle rotating ring and the outer periphery of the transmission ring at the same time; One-way snap rings are symmetrically arranged in the first connection block, and one-way teeth with the same direction are arranged in the two one-way snap rings respectively. A clamping plate is fixedly arranged at the rotation connection of the second connection block. When the hook swings, the one-way snap ring cooperates with the clamping plate to limit the release of the elastic member. When the hook stops swinging, the one-way clamping ring is separated from the clamping plate to release the restriction on the elastic member.

2. The adjustable speed hydraulic hoist with safety protection function according to claim 1 is characterized in that: Two abutment rods distributed along the length direction of the hoisting track are fixedly arranged on the sliding frame, the connecting shaft of the hook is located between the two abutment rods, and an abutment plate is hinged on one end of the two abutment rods close to the connecting shaft of the hook.

3. The adjustable speed hydraulic hoist with safety protection function according to claim 1 is characterized in that: The first connecting block is provided with a first telescopic rod, one end of which is fixed on the first connecting block, and the other end of which is fixed on the outer periphery of the one-way clamping ring. The first telescopic rod can drive the one-way clamping ring to approach or move away from the clamping plate.

4. The adjustable speed hydraulic hoist with safety protection function according to claim 1 is characterized in that: Clamps are symmetrically arranged in the first connecting block, and the clamps can move along the length direction of the lifting rail to clamp or move away from the connecting shaft of the hook. When the hook stops swinging, the clamps clamp the connecting shaft of the hook and the elastic member is released.

5. The adjustable speed hydraulic hoist with safety protection function according to claim 4 is characterized in that: A second telescopic rod is arranged in the first connecting block, one end of the second telescopic rod is fixedly connected in the first connecting block, and the other end of the second telescopic rod is fixedly connected to the clamping plate. The extension and retraction of the second telescopic rod can drive the clamping plate to clamp or move away from the connecting shaft of the hook.

6. The adjustable speed hydraulic hoist with safety protection function according to claim 1 is characterized in that: There are multiple steel cables, and the multiple steel cables are parallel to each other.

7. The adjustable speed hydraulic hoist with safety protection function according to claim 1 is characterized in that: A stabilizing plate is arranged between the steel cable and the first connecting block.

8. The adjustable speed hydraulic hoist with safety protection function according to claim 1, characterized in that: The hook is provided with an anti-dropping buckle.

Images