A hoist convenient for adjusting cargo platform

Abstract

The present invention discloses a hoist that is convenient for adjusting a cargo platform, which belongs to the technical field of hoist devices, comprises a frame and a cargo platform that can be lifted and lowered relative to the frame, the cargo platform being driven to rise and fall by a traction unit, and support frames are provided on both sides of the top of the cargo platform, one end of the traction unit is connected to the support frame, and a rotating shaft is provided on the top of the support frame; a rocker arm is installed at one end of the horizontal axis extending into a limit rod, and the cooperation between the rocker arm and the protrusion can drive the horizontal axis to rotate, which is conducive to leveling the inclined cargo platform, through this method, even if the cargo platform is in a tilted state, it will not affect the cooperation between the rocker arm and the protrusion, thereby being able to stably drive the horizontal axis to rotate, and a plurality of protrusions are installed in the height direction of the limit rod, and the cooperation between the rocker arm and the plurality of protrusions can be gradually leveled, thereby making the overall process more stable and controllable.

Description

Technical Field

[0001] The present invention relates to the technical field of hoist devices, and in particular to a hoist with a convenient cargo platform adjustment. Background Art

[0002] With the rapid development of the logistics and warehousing industry, the construction of high-bay warehouses for cargo storage is becoming more and more widespread. Elevators have become key equipment for cargo entering and leaving high-bay warehouses. The efficiency and trouble-free working time of elevators have become the key to the energy efficiency of high-bay warehouses.

[0003] Chinese patent CN219098635U discloses a chain hoist, which synchronously drives a lifting platform to move up and down along a fixed frame through a first lifting drive device and a second lifting drive device. The lifting platform is used to carry a trolley and input and output the trolley, so that there will be no movement deviation on both sides of the lifting platform, and the lifting platform will not be tilted.

[0004] The above-mentioned device maintains the horizontal state of the lifting platform by synchronously driving the chains on both sides. However, after long-term use, the chains on both sides of the lifting platform may deform in different situations, resulting in different lengths of the chains on both sides. In this case, the lifting platform may still tilt. In summary, the above-mentioned device still has room for improvement.

[0005] Therefore, it is necessary to provide a hoist that is easy to adjust the cargo platform to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a hoist that is easy to adjust the cargo platform, so as to solve the problem that the existing device proposed in the above background technology maintains the horizontal state of the lifting platform by synchronously driving the chains on both sides, but after long-term use, the chains on both sides of the lifting platform may deform in different situations, thereby causing the lifting platform to tilt.

[0007] Based on the above ideas, the present invention provides the following technical solutions: a hoist that is convenient for adjusting a cargo platform, comprising a frame and a cargo platform that can be raised and lowered relative to the frame, the cargo platform being driven to rise and fall by a traction unit, support frames being provided on both sides of the top of the cargo platform, one end of the traction unit being connected to the support frame, a rotating shaft being provided on the top of the support frame, an end of the traction unit close to the cargo platform being connected around the rotating shaft, a pressure block being provided on the rotating shaft, a stop block that cooperates with the pressure block being slidably mounted on the support frame, the stop block being on one side of the pressure block and in contact with the pressure block;

[0008] A sleeve is rotatably provided on the support frame, the sleeve passes through the stopper and is threadedly connected to the stopper, a driving assembly is provided at the sleeve, and a limiting rod that cooperates with the driving assembly is fixedly provided on the frame. When the cargo platform tilts, the driving assembly can be connected to the sleeve, so that the driving assembly can drive the sleeve to rotate during the process of moving upward along the limiting rod;

[0009] The driving assembly includes a horizontal axis arranged in the sleeve, and a card block is elastically connected to the horizontal axis. A plurality of card slots cooperating with the card block are evenly opened on the inner wall of the sleeve. The end of the card block extending into the slot is an inclined surface. A rocker arm is fixedly provided on the end of the horizontal axis extending into the interior of the limit rod, and a plurality of protrusions cooperating with the rocker arm are fixedly provided on one side wall of the inner side of the limit rod.

[0010] As a further solution of the present invention: a pull rod is provided in the horizontal axis, the pull rod is located at one end of the horizontal axis away from the limit rod and is elastically connected to the horizontal axis, an annular recess is provided on the outer peripheral wall of the pull rod, a conical pressing sleeve is fixed on the recess, and the end of the clamping block away from the sleeve is in the recess and on one side of the pressing sleeve.

[0011] As a further solution of the present invention: a box body is fixedly provided on the inner side surface of the support frame, a magnetic plate is fixedly provided on one end of the pull rod located inside the box body, and an electromagnet is fixedly provided on the inner end surface of the box body. When the electromagnet is in an energized state, the side of the electromagnet opposite to the magnetic plate has different magnetic poles.

[0012] As a further solution of the present invention: the support frame is provided with a through hole for the sleeve to pass through.

[0013] As a further solution of the present invention: a protrusion is elastically connected to the inner wall of the through hole, and a plurality of grooves matching the protrusions are opened on the outer peripheral wall of the sleeve, and one end of the protrusion located inside the groove is a spherical structure.

[0014] As a further solution of the present invention: detection units for detecting whether the cargo platform is tilted are installed on both sides of the bottom of the cargo platform, and the detection units are electrically connected to the electromagnet.

[0015] As a further solution of the present invention: the horizontal shaft is rotatably connected to the box body, and a torsion unit is sleeved at the end position of the horizontal shaft, and the two ends of the torsion unit are respectively connected to the outer wall of the horizontal shaft and the inner wall of the box body.

[0016] As a further solution of the present invention: a mounting hole is provided at one end of the horizontal axis away from the limiting rod, the pull rod slides in the mounting hole, and a tension spring is provided between the inner end surface of the mounting hole and the pull rod.

[0017] As a further solution of the present invention: a sleeve is fixedly mounted on the rotating shaft, and the pressing block is fixed to the outer peripheral wall of the sleeve.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: this device installs a rocker arm at one end of the horizontal axis extending into the limit rod, and the cooperation between the rocker arm and the protrusion can drive the horizontal axis to rotate, which is beneficial to leveling the tilted cargo platform. In this way, even if the cargo platform is in a tilted state, it will not affect the cooperation between the rocker arm and the protrusion, so that the horizontal axis can be driven to rotate stably. In addition, multiple protrusions are installed in the height direction of the limit rod, and the cooperation between the rocker arm and the multiple protrusions can gradually level the tilted cargo platform, making the overall process more stable and controllable. In addition, through the cooperation between the pressure block and the stop block, the cargo platform can be adjusted more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a front view of the present invention;

[0022] Figure 3 It is a schematic diagram of the connection structure between the traction unit and the cargo platform of the present invention;

[0023] Figure 4 It is a schematic diagram of the limiting rod and the protrusion structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the pressing plate structure of the present invention;

[0025] Figure 6 It is a schematic structural diagram of the detection unit of the present invention;

[0026] Figure 7 It is a schematic diagram of the internal structure of the horizontal axis and the sleeve of the present invention;

[0027] Figure 8 This invention Figure 6 A schematic diagram of the enlarged structure at point A;

[0028] Figure 9 This invention Figure 7 A schematic diagram of the enlarged structure at point B;

[0029] Figure 10 It is a schematic diagram of the cooperation between the card block and the card slot of the present invention.

[0030] In the figure: 1. Frame; 2. Limit rod; 201. Protrusion; 3. Cargo platform; 301. Support frame; 4. Traction unit; 5. Rocker arm; 6. Stop block; 7. Rotating shaft; 701. Pressure block; 702. Pulley; 8. Box body; 9. Pressure plate; 10. Slider; 11. Pressure sensor; 12. Horizontal axis; 13. Pull rod; 1301. Magnetic plate; 14. Electromagnet; 15. Torsion unit; 16. Sleeve; 1601. Slot; 17. Press sleeve; 1701. Conical surface; 18. Protrusion; 19. Block; 1901. Guide block; 1902. Inclined surface. DETAILED DESCRIPTION

[0031] like Figures 1-10 As shown, a hoist that is convenient for adjusting the cargo platform includes a hoist, which includes a frame 1 and a cargo platform 3 arranged in the frame 1 and capable of being raised and lowered relative to the frame 1. Specifically, the cargo platform 3 can be driven up and down by a traction unit 4, and the traction unit 4 is a structure such as a chain, a wire rope or a synchronous belt. A cargo picking and placing mechanism is provided on the cargo platform 3, and the cargo picking and placing mechanism can be a roller conveyor line or a telescopic fork, etc. The hoist is a common equipment on the market, and the specific structure and working principle of the hoist are not described here.

[0032] Support frames 301 are welded on both sides of the top of the cargo platform 3, and the end of the traction unit 4 close to the cargo platform 3 is connected to the support frame 301 to drive the cargo platform 3 to move;

[0033] Further, refer to Figure 1-Figure 3 As shown, in order to connect the traction unit 4 with the support frame 301, the present solution is provided with a rotating shaft 7 at the top of the support frame 301, and the rotating shaft 7 rotates with the support frame 301, and a sleeve is fixedly provided on the rotating shaft 7, and a pressure block 701 is fixedly provided on the outer peripheral wall of the sleeve, and a stopper 6 that cooperates with the pressure block 701 is slidably installed on the support frame 301, and the stopper 6 is on one side of the pressure block 701 and contacts with the pressure block 701. Preferably, the traction unit 4 in the present solution adopts a synchronous belt structure, and a pulley 702 is fixedly provided at the position near both ends of the rotating shaft 7, and the end of the synchronous belt close to the cargo platform 3 is wrapped around the outside of the pulley 702 and fixedly connected to the pulley 702. Through this structure, when the limit on the rotating shaft 7 is released, the rotating shaft 7 can be pulled to rotate by the synchronous belt.

[0034] Reference Figures 1-9As shown, the support frame 301 is provided with a sleeve 16 that cooperates with the stop block 6. Specifically, the sleeve 16 passes through the support frame 301 and rotates with the support frame 301 through a bearing, and the sleeve 16 passes through the stop block 6 and is threadedly connected to the stop block 6. A driving assembly is provided at the sleeve 16, and a limit rod 2 that cooperates with the driving assembly is fixedly provided on the frame 1. When the cargo platform 3 tilts, the driving assembly can be connected to the sleeve 16, so that the driving assembly can drive the sleeve 16 to rotate during the upward movement along the limit rod 2, and then drive the stop block 6 to move in the direction away from the rotating shaft 7 through the sleeve 16. In this process, since the stop block 6 loses its limit on the pressure block 701, the synchronous belt can pull the rotating shaft 7 to rotate. Since the synchronous belt is loosened from the pulley 702, the originally raised side of the cargo platform 3 can deflect downward, which is conducive to the cargo platform 3 returning to a horizontal state.

[0035] The drive assembly includes a transverse shaft 12 disposed in a sleeve 16. The transverse shaft 12 is coaxial with the sleeve 16, and a clamping block 19 is elastically connected to the transverse shaft 12. Figure 7-10 As shown, the inner wall of the sleeve 16 is evenly provided with a plurality of slots 1601 that match the block 19. Figure 10 As can be seen in the figure, the end of the block 19 extending into the slot 1601 is a slope 1902. Through this structure, the horizontal shaft 12 can only drive the sleeve 16 to rotate in one direction. Figure 3-Figure 6 As shown, the cross-section of the limit rod 2 is a U-shaped structure, and the end of the horizontal axis 12 extending into the interior of the limit rod 2 is fixedly provided with a rocker arm 5. In the initial state, the rocker arm 5 is in a horizontal state, and a plurality of protrusions 201 cooperating with the rocker arm 5 are fixedly provided on one side wall of the interior of the limit rod 2. Through this structure, when the cargo platform 3 moves upward, one end of the rocker arm 5 can fit with the bottom of the protrusion 201. As the cargo platform 3 continues to move upward, the protrusion 201 can drive the rocker arm 5 to deflect. During this process, if the block 19 cooperates with the slot 1601, it can drive the sleeve 16 to rotate through the horizontal axis 12, thereby prompting the stop block 6 to gradually move away from the pressure block 701.

[0036] Reference Figure 3-Figure 10As shown, a pull rod 13 is provided in the horizontal shaft 12, and the pull rod 13 is located at one end of the horizontal shaft 12 away from the limit rod 2 and is elastically connected to the horizontal shaft 12, so that the pull rod 13 can move along the axial direction of the horizontal shaft 12, and an annular recess is provided on the outer peripheral wall of the pull rod 13, and a conical pressing sleeve 17 is fixedly provided on the recess, and the end of the block 19 away from the sleeve 16 is in the recess and on one side of the pressing sleeve 17. In actual use, when the pull rod 13 is pulled to move relative to the sleeve 16, the block 19 can be lifted by the pressing sleeve 17, so that one end of the block 19 can be inserted into the slot 1601, so that the horizontal shaft 12 can drive the sleeve 16 to rotate.

[0037] Combine Figure 4-10 As shown, a box body 8 is fixedly provided on the inner side surface of the support frame 301, and the box body 8 is coaxially arranged with the pull rod 13. One end of the pull rod 13 passes through the sleeve 16 and is located in the box body 8, and a magnetic plate 1301 is fixedly provided on the end of the pull rod 13 located inside the box body 8. An electromagnet 14 is fixedly provided on the inner end surface of the box body 8. When the electromagnet 14 is in an energized state, the side of the electromagnet 14 opposite to the magnetic plate 1301 has different magnetic poles.

[0038] In actual use, detection units can be installed on both sides of the bottom of the cargo platform 3. When one side of the cargo platform 3 tilts upward, the detection unit on this side can control the electromagnet 14 on the same side to be in an energized state. The suction force of the electromagnet 14 on the magnetic plate 1301 can pull the pull rod 13, so that the pressing sleeve 17 can squeeze the card block 19. When one end of the card block 19 is inserted into the card slot 1601, the horizontal shaft 12 can drive the sleeve 16 to rotate in one direction.

[0039] When the synchronous belt (the synchronous belt is located on the side of the pulley 702 close to the block 6) pulls the cargo platform 3 to move upward, the end of the horizontal shaft 12 extending into the limit rod 2 can move upward relative to the limit rod 2, referring to Figure 3As shown, when the rocker arm 5 at the end of the transverse axis 12 moves to the protrusion 201, the protrusion 201 blocks the rocker arm 5, so that the end of the rocker arm 5 close to the protrusion 201 can deflect downward. In this process, the rocker arm 5 can drive the transverse axis 12 to rotate a certain angle, and the transverse axis 12 drives the sleeve 16 to rotate a certain angle through the cooperation between the block 19 and the slot 1601. Since the sleeve 16 and the block 6 are threadedly connected, the sleeve 16 can drive the block 6 to move in the direction away from the pressure block 701 when it rotates. Since one end of the synchronous belt is wound around the pulley 702, when the block 6 moves away from the pressure block 701, the synchronous belt approaches the cargo platform 3. A part of it will be loosened from the pulley 702, so that the side of the cargo platform 3 that was originally tilted upward can be deflected downward. After the rocker arm 5 passes the protrusion 201, the rocker arm 5 can return to a horizontal state. As the rocker arm 5 passes through multiple protrusions 201 in turn, the side of the cargo platform 3 that was tilted upward can continue to deflect downward. When the cargo platform 3 is in a horizontal state, the detection unit controls the electromagnet 14 to be in a power-off state. At this time, the pressure sleeve 17 is separated from the block 19, so that one end of the block 19 moves out of the slot 1601. In this state, the horizontal axis 12 cannot drive the sleeve 16 to rotate, and the block 6 and the pressure block 701 remain stable.

[0040] To sum up, this device installs a rocker arm 5 at one end of the horizontal axis 12 that extends into the limit rod 2. The cooperation between the rocker arm 5 and the protrusion 201 can drive the horizontal axis 12 to rotate, which is beneficial to leveling the inclined cargo platform 3. In this way, even if the cargo platform 3 is in a tilted state, it will not affect the cooperation between the rocker arm 5 and the protrusion 201, so that the horizontal axis 12 can be driven to rotate stably. In addition, multiple protrusions 201 are installed in the height direction of the limit rod 2. The cooperation between the rocker arm 5 and the multiple protrusions 201 can gradually level the inclined cargo platform 3, making the overall process more stable and controllable. In addition, through the cooperation between the pressure block 701 and the stop block 6, the cargo platform 3 can be adjusted more smoothly.

[0041] like Figure 3-Figure 10 As shown, bases are fixedly provided on both sides of the top of the support frame 301, and the ends of the rotating shaft 7 pass through the base and rotate with the base through bearings. A plurality of guide rods are fixedly provided on the support frame 301, and the guide rods pass through the stop block 6 and slide with the stop block 6 to limit the rotation of the stop block 6. Through this structure, the stop block 6 can be driven to move when the sleeve 16 rotates.

[0042] The pulley 702 is hinged with a pressure plate 9. In actual use, the end of the synchronous belt close to the cargo platform 3 can be directly fixedly connected to the pulley 702, or the pressure plate 9 can be rotated to press the pressure plate 9 against the outside of the synchronous belt, and then the pressure plate 9 is fixedly connected to the pulley 702. The synchronous belt can also be fixed in this way.

[0043] A mounting hole is provided at one end of the horizontal axis 12 away from the limit rod 2, and the pull rod 13 slides in the mounting hole, and a tension spring is provided between the inner end surface of the mounting hole and the pull rod 13, and the part of the horizontal axis 12 located inside the box body 8 is sleeved with a bearing, and the bearing is located between the horizontal axis 12 and the box body 8, so as to maintain the stability of the horizontal axis 12, and a torsion unit 15 is sleeved at the end position of the horizontal axis 12, and the torsion unit 15 can be a torsion spring or a coil spring, and the two ends of the torsion unit 15 are respectively connected to the outer wall of the horizontal axis 12 and the inner wall of the box body 8. In this way, the rocker arm 5 can maintain a horizontal state in the initial state.

[0044] Reference Figure 9 As shown, the horizontal shaft 12 is provided with a mounting groove that cooperates with the block 19. The mounting groove is a "cross" structure, so that the block 19 is set along the diameter direction of the horizontal shaft 12. Guide blocks 1901 are fixedly provided on both sides of the block 19. The guide blocks 1901 slide in the mounting groove, and a limiting spring is provided between the top surface of the mounting groove and the guide block 1901 to achieve elastic cooperation between the block 19 and the horizontal shaft 12. Figure 9 As can be seen in the figure, the outer wall of the pressing sleeve 17 is a tapered surface 1701, which is conducive to squeezing the block 19.

[0045] In order to improve the stability between the sleeve 16 and the support frame 301, this solution provides a through hole on the support frame 301 for the sleeve 16 to pass through, and a protrusion 18 is elastically connected to the inner wall of the through hole through a spring, and a plurality of grooves matching the protrusion 18 are provided on the outer peripheral wall of the sleeve 16. The grooves are distributed in a circular array along the circumference of the sleeve 16, and the end of the protrusion 18 located inside the groove is a spherical structure. In this way, the sleeve 16 and the support frame 301 can be kept stable, and when the horizontal axis 12 drives the sleeve 16 to rotate, one end of the protrusion 18 can be moved out of the groove.

[0046] Reference Figure 6 As shown, as one of the embodiments of the detection unit, a frame can be fixedly installed at the bottom of the support frame 301, and a slider 10 is elastically connected to one end of the frame through a limit spring. The slider 10 slides in the frame, and a pressure sensor 11 is installed at one end face of the frame near the slider 10. The pressure sensor 11 is electrically connected to the electromagnet 14. When one side of the support frame 301 tilts upward, the slider 10 can slide downward and squeeze the pressure sensor 11, thereby prompting the electromagnet 14 to be energized. Of course, in actual use, whether the cargo platform 3 is tilted can also be detected by using structures such as inclination sensors or electronic levels. Since this is a mature technical means, it will not be elaborated here.

Claims

1. A lifting machine for facilitating the adjustment of a cargo platform, comprising a frame and a cargo platform capable of being raised and lowered relative to the frame, the cargo platform being raised and lowered by a traction unit, with support frames provided on both sides of the top of the cargo platform, one end of the traction unit being connected to the support frames, characterized in that: A rotating shaft is provided on the top of the support frame, and one end of the traction unit close to the cargo platform is connected to the rotating shaft. A pressure block is provided on the rotating shaft, and a stopper matched with the pressure block is slidably installed on the support frame. The stopper is located on one side of the pressure block and in contact with the pressure block. A sleeve is rotatably provided on the support frame, the sleeve passes through the stopper and is threadedly connected to the stopper, a driving assembly is provided at the sleeve, and a limiting rod that cooperates with the driving assembly is fixedly provided on the frame. When the cargo platform tilts, the driving assembly can be connected to the sleeve, so that the driving assembly can drive the sleeve to rotate during the process of moving upward along the limiting rod; The driving assembly includes a horizontal axis arranged in the sleeve, and a card block is elastically connected to the horizontal axis. A plurality of card slots cooperating with the card block are evenly opened on the inner wall of the sleeve. The end of the card block extending into the slot is an inclined surface. A rocker arm is fixedly provided on the end of the horizontal axis extending into the interior of the limit rod, and a plurality of protrusions cooperating with the rocker arm are fixedly provided on one side wall of the inner side of the limit rod.

2. The elevator with easy cargo platform adjustment according to claim 1, characterized in that: A pull rod is provided in the horizontal axis, which is located at one end of the horizontal axis away from the limit rod and is elastically connected to the horizontal axis. An annular recess is provided on the outer peripheral wall of the pull rod, and a conical pressing sleeve is fixed on the recess. The end of the clamping block away from the sleeve is in the recess and on one side of the pressing sleeve.

3. The elevator with easy cargo platform adjustment according to claim 2, characterized in that: A box body is fixedly provided on the inner side surface of the support frame, a magnetic plate is fixedly provided on one end of the pull rod located inside the box body, and an electromagnet is fixedly provided on the inner end surface of the box body. When the electromagnet is in an energized state, the side of the electromagnet opposite to the magnetic plate has different magnetic poles.

4. The elevator with easy cargo platform adjustment according to claim 1, characterized in that: The support frame is provided with a through hole for the sleeve to pass through.

5. The elevator with easy cargo platform adjustment according to claim 4, characterized in that: A protrusion is elastically connected to the inner wall of the through hole, and a plurality of grooves matching with the protrusion are opened on the outer peripheral wall of the sleeve. One end of the protrusion located inside the groove is a spherical structure.

6. The elevator with easy cargo platform adjustment according to claim 3, characterized in that: Detection units for detecting whether the cargo platform is tilted are installed on both sides of the bottom of the cargo platform, and the detection units are electrically connected to the electromagnet.

7. The elevator with easy cargo platform adjustment according to claim 3, characterized in that: The transverse shaft is rotatably connected to the box body, and a torsion unit is sleeved at the end position of the transverse shaft, and two ends of the torsion unit are respectively connected to the outer wall of the transverse shaft and the inner wall of the box body.

8. The elevator with easy cargo platform adjustment according to claim 2, characterized in that: A mounting hole is provided at one end of the horizontal axis away from the limiting rod. The pull rod slides in the mounting hole, and a tension spring is provided between the inner end surface of the mounting hole and the pull rod.

9. The elevator with easy cargo platform adjustment according to claim 1, characterized in that: A sleeve is fixedly sleeved on the rotating shaft, and the pressing block is fixed on the outer peripheral wall of the sleeve.

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