A lifting device

Abstract

The present invention relates to a lifting device, comprising a shell, a drum pivotally connected in the shell, a control circuit board and a guide rod; a spiral groove is provided on the outer surface of the drum, and a cable that can be retracted is contained in the spiral groove; an arc-shaped guide block is slidably provided on the guide rod, and a first protrusion group and a second protrusion group that can mesh with the spiral groove and press against the cable are provided on the surface of the guide block at intervals along the axial direction, the first protrusion group includes a plurality of first arc-shaped protrusions, the second protrusion group includes a plurality of second arc-shaped protrusions, and the guide block is provided with a guide block through hole at the position where the first arc-shaped protrusion adjacent to the second protrusion group is located, the arc-shaped surface of the first arc-shaped protrusion relative to the guide block is a surface of a U-shaped structure with an inward-recessed cross section, and the arc-shaped surface of the second arc-shaped protrusion relative to the guide block is a surface of an inverted U-shaped structure with an outward-convex cross section. The invention utilizes different protrusions on the guide block to ensure smooth cable retraction and release, convenient use, and improved work efficiency.

Description

Technical Field

[0001] The invention relates to the field of hoisting, in particular to a hoisting device. Background Art

[0002] The lifting equipment starts a vertical or vertical and horizontal working stroke after picking up the materials, unloads after reaching the destination, and then travels empty to the material picking location to complete a working cycle, and then performs a second lifting or transportation. It is an important tool and equipment for alleviating heavy physical labor and improving labor productivity. In the existing lifting equipment, there is a process of retracting and releasing the lifting rope during the lifting process, and the retraction and release of the lifting rope is synchronized with the drum. Due to the coordination problem between the lifting rope and the drum, jamming often occurs, resulting in an unsmooth lifting process. Summary of the invention

[0003] In view of the existing deficiencies, the present invention provides a lifting device.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a lifting device comprises a shell with an accommodating cavity, the shell is pivotally connected to a drum driven by a bidirectional motor in the accommodating cavity, and the shell is also provided with a control circuit board in the accommodating cavity; the outer surface of the drum is provided with a spiral groove, and the spiral groove accommodates a cable that can be retracted and released as the drum rotates and the end of which passes through the shell, the depth of the spiral groove is not less than the radius of the cable, and the width is not greater than the diameter of the cable; the shell is also provided with a guide rod parallel to the axial direction of the drum in the accommodating cavity, and a guide block is slidably provided on the guide rod, the guide block is an arc-shaped guide block slidably provided on the outer wall of the drum, and the guide block is a inferior arc-shaped guide block, and the guide block is axially spaced on the surface corresponding to the drum and can engage with the spiral groove. A first protrusion group and a second protrusion group that can press against the cable, the first protrusion group includes a plurality of first arc-shaped protrusions that are evenly spaced along the axial direction of the guide block, the second protrusion group includes a plurality of second arc-shaped protrusions that are evenly spaced along the axial direction of the guide block, the guide block is provided with a guide block through hole at the position of the first arc-shaped protrusion adjacent to the second protrusion group, the axial center line of the guide block through hole is parallel to the line connecting the two ends of the arc-shaped structure of the guide block, the arc-shaped surface of the first arc-shaped protrusion relative to the guide block is the surface of the U-shaped structure with a concave cross-section, and the arc-shaped surface of the second arc-shaped protrusion relative to the guide block is the surface of the inverted U-shaped structure with a convex cross-section; the spacing between the first arc-shaped protrusions in the first protrusion group and the spacing between the second arc-shaped protrusions in the second protrusion group are the same as the spacing between the first protrusion group and the second protrusion group.

[0005] Preferably, an inner shell is installed at the lower portion of the accommodating cavity, the roller is pivotally connected in the inner shell, the bidirectional motor is installed outside the inner shell, and a U-shaped bracket connected to the top of the inner shell and opening upward is provided at the upper portion of the accommodating cavity, the open end of the U-shaped bracket passes through the top of the shell and is connected to a mounting seat, and the control circuit board is arranged on the U-shaped bracket; the cable passes through the inner shell and the shell in turn and is connected with a hook at the end.

[0006] Preferably, the inner shell is provided with an inner shell notch matching the sliding of the guide block, and the two ends of the guide rod are correspondingly connected to the two ends of the inner shell notch.

[0007] Preferably, two guide rods are arranged in parallel, and two ends of the arc-shaped structure of the guide block are correspondingly slidably arranged on the two guide rods.

[0008] Preferably, a shell through hole for the cable to pass through is provided at the lower portion of the shell, and the shell through hole is in a strip shape and its length matches the length of the drum.

[0009] Preferably, a power adapter electrically connected to the control circuit board is also provided in the accommodating cavity.

[0010] Preferably, an LED lamp electrically connected to the control circuit board is also arranged in the accommodating cavity.

[0011] Preferably, a metering module is provided on the control circuit board, and the metering module includes a counter for counting the number of forward and reverse rotations of the bidirectional motor and a tension sensor for sensing the weight of the product lifted by the cable.

[0012] The beneficial effects of the present invention are as follows: the present invention utilizes different protrusions on the guide block to ensure smooth cable retraction and release, avoids the occurrence of jamming problems, is easy to use, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0014] Figure 2 is a schematic diagram of the decomposed structure of an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the external structure of the guide block in an embodiment of the present invention;

[0016] Figure 4 is a schematic structural diagram of the inner surface of the guide block in an embodiment of the present invention;

[0017] Figure 5 is a schematic diagram of the structure of an embodiment of the present invention without the housing;

[0018] Figure 6Schematic diagram of the connection structure of the drum and the cable according to an embodiment of the present invention;

[0019] Figure 7 2 is a schematic structural diagram of a roller according to an embodiment of the present invention;

[0020] Names and serial numbers of parts in the figure: 1-shell 10-accommodating cavity 11-shell through hole 2-bidirectional motor 3-roller 30-spiral groove 4-control circuit board 40-power adapter 41-LED lamp 5-cable 50-hook 6-guide rod 7-guide block 70-first arc-shaped protrusion 71-second arc-shaped protrusion 72-guide block through hole 8-inner shell 80-inner shell notch 9-U-shaped bracket 90-mounting seat. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the purpose, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in conjunction with the accompanying drawings and embodiments below for a clear and complete description. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. In addition, the directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", etc., are only referenced to the directions of the attached diagrams. The directional terms used are for better and clearer explanation and understanding of the present invention, rather than indicating or implying the orientation that the present invention must have, and therefore cannot be understood as limitations on the present invention.

[0022] Embodiments of the present invention Figures 1 to 7As shown in the figure, a lifting device includes a shell 1 with a accommodating cavity 10 therein. The accommodating cavity 10 in the shell 1 is convenient for installing various components therein and protects the components therein. At this time, the shell 1 can adopt an integrated structure, and then a mounting port is provided on the integrated structure. For the convenience of installation, the shell 1 includes a front shell and a rear shell that are engaged with each other to form an accommodating cavity 10, which facilitates production and assembly, and is also convenient for timely repair and replacement of components in the shell 1 when problems occur. The shell 1 is pivotally connected to a roller 3 driven by a bidirectional motor 2 in the accommodating cavity 10, that is, the roller 3 can rotate relative to the shell 1, and its rotation is performed in the accommodating cavity 10. At this time, the roller 3 is pivotally connected in the shell 1. It is achieved through a rotating shaft, which is installed in the shell 1. One end of the rotating shaft can be pivoted on the shell 1 through a bearing, and the other end is fixedly connected to the output shaft of the bidirectional motor 2. At the same time, the roller 3 is fixedly sleeved on the rotating shaft. In this way, when the bidirectional motor 2 is started, the rotation of its output shaft drives the rotating shaft to rotate, and the rotating shaft drives the roller 3 to rotate. The shell 1 is also provided with a control circuit board 4 in the accommodating cavity 10, which is used to control the operation of electrical equipment such as the bidirectional motor 2, which means that the control circuit board 4 is electrically connected to the bidirectional motor 2 or other electrical equipment. At the same time, a wireless communication module can be arranged on it, and then the wireless communication module is used to communicate with the smart terminal or remote control, and then remote control operation is performed through the remote control, or on the smart terminal The corresponding APP can be used on the end to remotely control and monitor the lifting device. A cloud system can also be set up between the smart terminal and the device to control it more effectively and conveniently through the cloud system. At the same time, a metering module is set on the control circuit board 4, and the metering module includes a counter for counting the number of forward and reverse rotations of the bidirectional motor 2 and a tension sensor for sensing the weight of the product lifted by the cable 5. The counter can be realized by using a counting circuit to remind people that the cable needs to be replaced after a certain number of uses to ensure safe use. The tension sensor is used to sense the weight of the lifted items on the cable to avoid overload lifting. At the same time, a display screen and an alarm unit can be set outside the shell 1 to display the corresponding The detected parameters enable people to intuitively understand the condition of the lifting device, and give an alarm when it is overloaded, thus avoiding the occurrence of danger; the outer surface of the drum 3 is provided with a spiral groove 30, and the spiral groove 30 contains a cable 5 which can be retracted and released as the drum 3 rotates and the end of which passes through the shell 1. The spiral groove 30 is used to store the cable 5, and the cable 5 is also a lifting rope, which is installed in the spiral groove 30 and is wound around the outside of the drum 3 along the direction of the spiral groove 30. At this time, the depth of the spiral groove 30 is not less than the radius of the cable 5, and the width is not greater than the diameter of the cable 5, so that the cable 5 can be conveniently stored in the spiral groove 30. When not in use, the cable 5 can be pressed tightly in the spiral groove 30. When in use, as the drum 3 rotates,The cable 5 can be easily retracted and released, and the smoothness of the retraction and release of the cable 5 is maintained. The cable 5 passes through the shell 1 through a shell through hole 11 provided at the lower part of the shell 1 for the cable 5 to pass through. The shell through hole 11 is in a strip shape and its length matches the length of the drum 3, so that the cable 5 can also move in the same direction as the axial direction of the drum 3, avoiding the edge of the shell through hole 11 from having an adverse effect on the cable; the shell 1 is also provided with a guide rod 6 parallel to the axial direction of the drum 3 in the accommodating cavity 10, and a guide block 7 is slidably provided on the guide rod 6, which determines that the sliding direction of the guide block 7 is the same as the axial direction of the drum 3, so that the guide block 7 can move along the axial direction of the outer wall of the drum 3 when the drum 3 rotates, and the guide block 7 is arc-shaped and slidably provided on the outside of the drum 3 The guide block 7 is provided on the wall, and the arc shape of the guide block 7 matches the shape of the outer wall of the drum 3. In order to ensure the sliding direction of the guide block 7, two guide rods 6 are provided in parallel. The two ends of the arc structure of the guide block 7 are correspondingly slid on the two guide rods 6. At this time, the guide block 7 is a guide block with an inferior arc shape, which is convenient for the installation and sliding of the guide block 7 on the outer wall of the drum 3. The guide block 7 is provided with a first protrusion group and a second protrusion group that can mesh with the spiral groove 30 and can press against the cable 5 at axial intervals on the surface corresponding to the drum 3. The first protrusion group includes a plurality of first arc protrusions 70 arranged at equal intervals along the axial direction of the guide block 7, and the second protrusion group includes a plurality of second arc protrusions 71 arranged at equal intervals along the axial direction of the guide block 7. The guide block 7 is relative to the drum 3. The corresponding surface is its inner surface, that is, the first protrusion group and the second protrusion group are arranged on both sides of the inner surface of the guide block 7, one side is the first protrusion group, and the other side is the second protrusion group, and each protrusion group contains a plurality of protrusions, which match the guide block 7 and are protrusions with the same arc structure as the guide block 7. The spacing between each protrusion is the same, and each protrusion can be correspondingly inserted into the spiral groove 30 on the outer wall of the drum 3 to press or release the cable 5 accommodated in the spiral groove 30, so as to facilitate the retraction and release of the cable 5 and ensure smooth lifting. The guide block 7 is provided with a guide block through hole 72 at the position of the first arc-shaped protrusion 70 adjacent to the second protrusion group, and the axial center line of the guide block through hole 72 is parallel to the connecting line at both ends of the arc structure of the guide block 7. That is to say, the axial direction of the guide block through hole 72 is parallel to the direction of the chord of the guide block 7. Elliptical ports are formed at both ends of the guide block through hole 72 on the guide block 7. The cable 5 passes through the guide block through hole 72. At both ends of the guide block through hole 72, the cable 5 can abut against the hole wall of the guide block through hole 72, thereby increasing the contact area between the two, facilitating the movement of the cable 5 with the guide block 7, and also avoiding damage to the cable 5 by the sharp edge. The arc surface of the first arc protrusion 70 opposite to the guide block 7 is a surface with a concave U-shaped structure in cross section, that is, the bottom surface of the first arc protrusion 70 is connected to the inner surface of the guide block 7, and the top surface of the first arc protrusion 70, that is, the arc surface opposite to the guide block 7, is facing the spiral groove 30.When the protrusion is engaged in the spiral groove 30, due to its U-shaped structure, there is a movable space between the two. The cable 5 stored in the spiral groove 30 reduces the pressure exerted by the protrusion on it, and can move conveniently in the movable space. At the same time, the first arc-shaped protrusions 70 are arranged in parallel and at intervals, and the guide block through hole 72 is arranged at a position adjacent to the second arc-shaped protrusion 71. In this way, during use, the multiple first arc-shaped protrusions 70 remove the pressure on the cable 5 to be released, and when it moves to the position where the guide block through hole 72 is located, it can be easily released from the spiral groove 30, thereby maintaining smooth lifting. Similarly, the arc surface of the second arc-shaped protrusion 71 opposite to the guide block 7 is a surface with an outwardly convex inverted U-shaped structure in cross section. Similarly, when the protrusion is engaged in the spiral groove, due to its outwardly convex inverted U-shaped structure, the space between the two is reduced, and the cable 5 stored in the spiral groove 30 is subjected to the pressure exerted by the protrusion, and can be well stored in the spiral groove 30. At the same time, the second arc-shaped protrusions 71 are arranged in parallel and spaced apart. In this way, during use, the multiple second arc-shaped protrusions 71 squeeze the cables 5 to be stored in turn to ensure that the cables 5 can be completely stored in the spiral groove 30, which is convenient for the next release and avoids the problem of jamming during the storage and release of the cables 5; the spacing between the first arc-shaped protrusions 70 in the first protrusion group and the spacing between the second arc-shaped protrusions 71 in the second protrusion group are the same as the spacing between the first protrusion group and the second protrusion group.

[0023] Further improvements such as Figures 1 to 6As shown in, an inner shell 8 is installed at the lower part of the accommodating cavity 10, the drum 3 is pivotally connected in the inner shell 8, and the bidirectional motor 2 is installed outside the inner shell 8. The setting of the inner shell 8 fixes the drum 3 and the cable 5 in the spiral groove 30 of the drum 3 in the inner shell 8, maintains the compactness and integrity of the structure, and can also avoid adverse effects on each other. At this time, the inner shell 8 is provided with an inner shell notch 80 that matches the sliding of the guide block 7, and the two ends of the guide rod 7 are correspondingly connected to the two ends of the inner shell notch 80. The inner shell notch 80 makes it convenient for the guide block 7 to drive the cable 5 to move. At the same time, the guide rod 6 can not only guide but also support the inner shell 8 to enhance the structural strength of the inner shell 8. The upper part of the accommodating cavity 10 is provided with a A U-shaped bracket 9, the open end of which passes through the top of the shell 1 and is connected to a mounting seat 90. The U-shaped bracket 9 is connected to the mounting seat 90 by a pin, and the mounting seat 90 is used to install the device where it is needed. The pin can be a fixed pin and a movable pin for use. The mounting seat 90 is provided with corresponding hooks and through holes. The fixed pin is first hung on the hook, and then the movable pin is passed through another hook or through hole to connect and fix the U-shaped bracket and the mounting seat, which is convenient for disassembly and assembly. The control circuit board is arranged on the U-shaped bracket; the cable 5 passes through the inner shell 8 and the shell 1 in turn and is connected to a hook 50 at the end. The hook 50 is used to hang the objects to be lifted. At this time, the hook 50 can be a spring hook for easy use.

[0024] Further improvements such as Figure 2 and Figure 5 As shown in the figure, a power adapter 40 electrically connected to the control circuit board 4 is also arranged in the accommodating cavity 10, which is convenient to use, ensures safety and saves energy.

[0025] Further improvements such as Figure 2 and Figure 5 As shown in the figure, the accommodating cavity 10 is also provided with an LED lamp 41 electrically connected to the control circuit board 4. The LED lamp 41 facilitates the use of the device in dim light. The LED lamp 41 is arranged on the inner bottom surface of the shell 1. A through hole is arranged on the bottom surface of the shell 1. The LED lamp cover is installed in the through hole. At the same time, the LED lamp is integrated on the circuit board to form an LED lamp board, which is convenient for production and installation.

[0026] It should be understood that those skilled in the art may make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A lifting device, characterized in that : It comprises a shell with an accommodating cavity, the shell is pivotally connected to a roller driven by a bidirectional motor in the accommodating cavity, and the shell is also provided with a control circuit board in the accommodating cavity; the outer surface of the roller is provided with a spiral groove, and the spiral groove accommodates a cable that can be retracted and released as the roller rotates and the end of which passes through the shell, the depth of the spiral groove is not less than the radius of the cable, and the width is not greater than the diameter of the cable; the shell is also provided with a guide rod parallel to the axial direction of the roller in the accommodating cavity, and a guide block is slidably provided on the guide rod, the guide block is an arc-shaped guide block slidably provided on the outer wall of the roller, and the guide block is a inferior arc-shaped guide block, and the guide block is provided with a first convex block that can mesh with the spiral groove and can press on the cable at intervals along the axial direction on the surface corresponding to the roller A protrusion group and a second protrusion group, the first protrusion group includes a plurality of first arc-shaped protrusions arranged at equal intervals along the axial direction of the guide block, the second protrusion group includes a plurality of second arc-shaped protrusions arranged at equal intervals along the axial direction of the guide block, the guide block is provided with a guide block through hole at the position of the first arc-shaped protrusion adjacent to the second protrusion group, the axial center line of the guide block through hole is parallel to the line connecting the two ends of the arc-shaped structure of the guide block, the arc-shaped surface of the first arc-shaped protrusion relative to the guide block is the surface of the U-shaped structure with a concave cross-section, and the arc-shaped surface of the second arc-shaped protrusion relative to the guide block is the surface of the inverted U-shaped structure with a convex cross-section; the spacing between the first arc-shaped protrusions in the first protrusion group and the spacing between the second arc-shaped protrusions in the second protrusion group are the same as the spacing between the first protrusion group and the second protrusion group.

2. The lifting device according to claim 1, characterized in that : An inner shell is installed at the lower part of the accommodating cavity, the roller is pivotally connected in the inner shell, the bidirectional motor is installed outside the inner shell, and a U-shaped bracket connected to the top of the inner shell and opening upward is provided at the upper part of the accommodating cavity, the open end of the U-shaped bracket passes through the top of the shell and is connected to a mounting seat, and the control circuit board is arranged on the U-shaped bracket; the cable passes through the inner shell and the shell in turn and is connected with a hook at the end.

3. The lifting device according to claim 2, characterized in that The inner shell is provided with an inner shell notch matching the sliding of the guide block, and the two ends of the guide rod are correspondingly connected to the two ends of the inner shell notch.

4. The lifting device according to claim 1, characterized in that : Two guide rods are arranged in parallel, and the two ends of the guide block arc structure are correspondingly slidably arranged on the two guide rods.

5. The lifting device according to claim 1, characterized in that The lower part of the shell is provided with a shell through hole through which the cable passes, and the shell through hole is in a strip shape and its length matches the length of the drum.

6. The lifting device according to claim 1, characterized in that : A power adapter electrically connected to the control circuit board is also arranged in the accommodating cavity.

7. The lifting device according to claim 1, characterized in that : An LED lamp electrically connected to the control circuit board is also arranged in the accommodating cavity.

8. The lifting device according to claim 1, characterized in that : A metering module is provided on the control circuit board, and the metering module includes a counter for counting the number of forward and reverse rotations of the bidirectional motor and a tension sensor for sensing the weight of the product lifted by the cable.

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