Electric hoist with limiting structure

Abstract

The utility model discloses an electric hoist with a limiting structure. The electric hoist comprises a box body, a hoisting mechanism and the limiting mechanism, mounting plates in bilateral symmetry are arranged at the upper end of the box body; the hoisting mechanism comprises a rotating column, a bobbin, a rope and a hook, the rotating column is rotationally connected between the left inner wall and the right inner wall of the box body, the bobbin is fixedly connected to the middle of the rotating column, the rope is arranged outside the bobbin, and the hook is arranged at the lower end of the rope; the limiting mechanism is arranged in the box body, the limiting mechanism and the hoisting mechanism are installed in a matched mode, an elastic rope is arranged at the lower end of the box body, the lower end of the elastic rope is fixedly connected with a control switch group, and the input end of the control switch group is electrically connected with an external power source. The rope is prevented from exceeding the limit, the safety of lifting operation is ensured, meanwhile, the rope can be taken back on the bobbin more uniformly, and the application effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of electric hoists, in particular to an electric hoist with a limiting structure. Background Art

[0002] Electric hoist is a special lifting equipment, installed on overhead crane and gantry crane. Electric hoist has the characteristics of small size, light weight, simple operation and convenient use. It is used in industrial and mining enterprises, warehouses, docks and other places. Electric hoist has compact structure, and the motor axis is perpendicular to the drum axis. Electric hoist adopts worm gear transmission device. Its disadvantages are: large length and width, bulky structure, low mechanical efficiency, difficult processing, etc. The hydraulic system is double-controlled, and the overflow regulating valve and magnetic contact pressure gauge can accurately control the pressure. The electrical control department adopts low voltage control to increase the safety of the control system;

[0003] The traditional electric hoist with limit structure uses a limiter to limit the rotation of the motor, so that the electric hoist stops, thereby preventing the occurrence of over-limit and ensuring the safety of the operation;

[0004] The traditional electric hoist with a limiting structure has the following problems: the limiting method is relatively simple by limiting the rope inside the electric hoist, and the rope cannot be evenly retracted onto the bobbin when it is retracted. Therefore, we propose an electric hoist with a limiting structure. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide an electric hoist with a limiting structure, so as to limit the rope in the electric hoist and prevent the rope from exceeding the limit, thereby ensuring the safety of the lifting operation. At the same time, the rope can be retracted more evenly on the drum, and the application effect is better, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric hoist with a limiting structure, comprising a box body, a lifting mechanism and a limiting mechanism;

[0007] Box body: The upper end of the box body is provided with a left-right symmetrical mounting plate;

[0008] Lifting mechanism: It includes a rotating column, a bobbin, a rope and a hook. The rotating column is rotatably connected between the left and right inner walls of the box body. The middle part of the rotating column is fixedly connected with the bobbin. The outside of the bobbin is provided with a rope, and the lower end of the rope is provided with a hook.

[0009] Limiting mechanism: It is arranged inside the box. The limiting mechanism is installed in conjunction with the lifting mechanism to limit the rope in the electric hoist, prevent the rope from exceeding the limit, ensure the safety of the lifting operation, and at the same time make the retraction of the rope on the drum more uniform and the application effect better.

[0010] Furthermore, an elastic rope is provided at the lower end of the box body, and a control switch group is fixedly connected to the lower end of the elastic rope. The input end of the control switch group is electrically connected to an external power supply to provide electrical connection for various electrical appliances.

[0011] Furthermore, the lifting mechanism also includes motor 1, which is arranged at the left end of the box body, the right end of the output shaft of motor 1 is fixedly connected to the left end of the rotating column, and the input end of motor 1 is electrically connected to the output end of the control switch group to provide lifting drive.

[0012] Furthermore, the limiting mechanism includes a rectangular groove, a screw rod, a large gear, a slider and a pinion. The upper end of the interior of the box body is provided with a rectangular groove, the interior of the rectangular groove is rotatably connected with a screw rod, the upper end of the screw rod is threadedly connected with a slider, the right end of the screw rod is fixedly connected with a large gear, and the right end of the rotating column is provided with a pinion. The large gear and the pinion are meshed and connected to achieve limiting.

[0013] Furthermore, the limiting mechanism also includes a telescopic rod, a spring and an insertion strip. A sliding groove is opened at the upper end of the slider, and the bottom wall of the sliding groove is fixedly connected with a front-to-rear symmetrical telescopic rod. Springs are respectively sleeved on the outside of the telescopic rod. The insertion strip is slidably connected to the inside of the sliding groove, and the upper side of the telescopic end of the telescopic rod is fixedly connected to the lower end of the insertion strip to provide telescoping.

[0014] Furthermore, the limiting mechanism also includes a rectangular box, an electric push rod, a push block and a socket. A rectangular box is provided at the right end of the upper surface of the rectangular groove, an electric push rod is provided at the upper end of the rectangular box, the telescopic end of the electric push rod is fixedly connected to the push block, and a socket is provided at the right end of the upper surface of the rectangular groove. The insertion strip and the push block are both installed in cooperation with the socket. The input end of the electric push rod is electrically connected to the output end of the control switch group to provide limiting drive.

[0015] Furthermore, it also includes a rope guiding mechanism, which includes a second motor, a threaded rod, a U-shaped slider and a roller. A support bar is provided at the lower end of the interior of the box, the threaded rod is rotatably connected to the interior of the support bar, the upper end of the threaded rod is threadedly connected to the U-shaped slider, the rear end of the U-shaped slider is slidably connected to the interior of the support bar, the front end of the U-shaped slider is rotatably connected to the roller through a pin shaft, the outer arc surface of the roller contacts the surface of the rope, the second motor is arranged at the lower end of the right side surface of the box, the left end of the output shaft of the second motor is fixedly connected to the right end of the threaded rod, and the input end of the second motor is electrically connected to the output end of the control switch group to achieve more uniform retraction of the rope.

[0016] Compared with the prior art, the beneficial effects of the utility model are: the electric hoist with a limiting structure has the following advantages:

[0017] 1. First, install the box at the required lifting position through the mounting plate, and then adjust the control switch group to make motor one run. The output shaft of motor one drives the rotating column to rotate, and the rotation of the rotating column drives the bobbin to rotate, and then lower the rope. At the same time, the control switch group is adjusted to make motor one rotate counterclockwise to retract the rope. When the rope is contracting, the rope is contracted in one place. By controlling the switch group, motor two runs, and the output shaft of motor two drives the threaded rod to rotate, and then drives the threaded U-shaped slider to move left and right, so that the roller contacts the rope, and moves the rope left and right when retracting, and retracts the rope evenly on the bobbin, so that the rope can be retracted more evenly on the bobbin, and the application effect is better.

[0018] 2. When lowering, the rotation of the rotating column drives the small gear to rotate, and the rotation of the small gear drives the meshing large gear to rotate, which in turn drives the screw rod to rotate. The rotation of the screw rod drives the threaded slider to move to the right. When the slider moves to the rightmost end of the screw rod, when the insert moves to the lower end of the socket, the insert pops out and connects with the socket under the rebound action of the telescopic rod and the spring, and the insert stops the movement of the slider, and then the screw rod rotates. The screw rod stops rotating to stop the large gear, and the large gear stops the meshing small gear from rotating, so that the rope stops moving downward, thereby realizing the rope limit locking, and then the goods are placed on the hook, and then the control switch group is adjusted, the electric push rod operates, the telescopic end of the electric push rod moves downward, and then drives the push block to move downward, so that the push block pushes the insert out, so that the insert is separated from the socket, and the rope in the electric hoist is limited to avoid the rope exceeding the limit, thereby ensuring the safety of the lifting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0021] Figure 3 This is an enlarged structural diagram of the utility model at A;

[0022] Figure 4 This is an enlarged structural diagram of point B of the utility model.

[0023] In the figure: 1 box, 2 lifting mechanism, 21 motor 1, 22 rotating column, 23 bobbin, 24 rope, 25 hook, 3 rope guide mechanism, 31 motor 2, 32 threaded rod, 33 U-shaped slider, 34 roller, 4 limit mechanism, 401 rectangular groove, 402 screw rod, 403 large gear, 404 slider, 405 telescopic rod, 406 spring, 407 insert, 408 rectangular box, 409 electric push rod, 410 push block, 411 jack, 412 small gear, 5 mounting plate, 6 elastic rope, 7 control switch group. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 , this embodiment provides a technical solution: an electric hoist with a limiting structure, comprising a box body 1, a lifting mechanism 2 and a limiting mechanism 4;

[0026] Box body 1: A left-right symmetrical mounting plate 5 is provided at its upper end, an elastic rope 6 is provided at its lower end, a control switch group 7 is fixedly connected to the lower end of the elastic rope 6, and an input end of the control switch group 7 is electrically connected to an external power supply;

[0027] Lifting mechanism 2: It includes a rotating column 22, a bobbin 23, a rope 24 and a hook 25. The rotating column 22 is rotatably connected between the left and right inner walls of the box body 1. The middle part of the rotating column 22 is fixedly connected with the bobbin 23. The outside of the bobbin 23 is provided with a rope 24. The lower end of the rope 24 is provided with a hook 25. The lifting mechanism 2 also includes a motor 21. The motor 21 is arranged at the left end of the box body 1. The right end of the output shaft of the motor 21 is fixedly connected to the left end of the rotating column 22. The input end of the motor 21 is electrically connected to the output end of the control switch group 7. First, the box body 1 is installed at the required lifting position through the mounting plate 5. Then, by adjusting the control switch group 7, the motor 21 is operated, and the output shaft of the motor 21 drives the rotating column 22 to rotate. The rotation of the rotating column 22 drives the bobbin 23 to rotate, and then the rope 24 is lowered;

[0028] The limiting mechanism 4 is arranged inside the box body 1, and the limiting mechanism 4 is installed in cooperation with the lifting mechanism 2. The limiting mechanism 4 includes a rectangular groove 401, a screw rod 402, a large gear 403, a slider 404 and a small gear 412. The upper end of the box body 1 is provided with a rectangular groove 401, and the inner part of the rectangular groove 401 is rotatably connected with the screw rod 402, and the upper end of the screw rod 402 is threadedly connected with the slider 404, and the right end of the screw rod 402 is fixedly connected with the large gear 403, and the right end of the rotating column 22 is provided with a small gear 412, and the large gear 403 is meshed with the small gear 412. The limiting mechanism 4 also includes a telescopic rod 405, a spring 406 and an insert The upper end of the slider 404 is provided with a slide groove, and the bottom wall of the slide groove is fixedly connected with a front-to-rear symmetrical telescopic rod 405, and the outer part of the telescopic rod 405 is respectively sleeved with a spring 406, and the insertion strip 407 is slidably connected to the inside of the slide groove, and the upper side of the telescopic end of the telescopic rod 405 is fixedly connected to the lower end of the insertion strip 407, and the limiting mechanism 4 also includes a rectangular box 408, an electric push rod 409, a push block 410 and a socket 411. The right end of the upper surface of the rectangular groove 401 is provided with a rectangular box 408, and the upper end of the rectangular box 408 is provided with an electric push rod 409. The telescopic end of the electric push rod 409 is fixedly connected with a push block 410, and the rectangular groove 401 A socket 411 is provided at the right end of the upper surface, and the inserting strip 407 and the pushing block 410 are both installed in cooperation with the socket 411. The input end of the electric push rod 409 is electrically connected to the output end of the control switch group 7. When lowering, the rotating column 22 rotates to drive the small gear 412 to rotate, and the small gear 412 rotates to drive the meshing large gear 403 to rotate, thereby driving the screw rod 402 to rotate, and the screw rod 402 rotates to drive the threaded slider 404 to move to the right. When the slider 404 moves to the rightmost end of the screw rod 402, when the inserting strip 407 moves to the lower end of the socket 411, the inserting strip 407 is resilient under the rebound effect of the telescopic rod 405 and the spring 406. The plug strip 407 pops out and plugs into the socket 411, and the plug strip 407 stops the slider 404 from moving, thereby causing the screw rod 402 to rotate. The screw rod 402 stops rotating, causing the large gear 403 to stop rotating, and the large gear 403 stops the meshing small gear 412 from rotating, thereby stopping the rope 24 from moving downward, thereby achieving the limit locking of the rope 24, and then placing the goods on the hook 25, and then by regulating the control switch group 7, the electric push rod 409 operates, and the telescopic end of the electric push rod 409 moves downward, thereby driving the push block 410 to move downward, so that the push block 410 pushes the plug strip 407 out, so that the plug strip 407 is separated from the socket 411;

[0029] The rope guide mechanism 3 includes a motor 21, a threaded rod 32, a U-shaped slider 33 and a roller 34. A support bar is provided at the lower end of the box body 1. The threaded rod 32 is rotatably connected to the inside of the support bar. The upper end of the threaded rod 32 is threadedly connected to the U-shaped slider 33. The rear end of the U-shaped slider 33 is slidably connected to the inside of the support bar. The front end of the U-shaped slider 33 is rotatably connected to the roller 34 through a pin shaft. The outer arc surface of the roller 34 contacts the surface of the rope 24. The motor 21 is arranged at the lower end of the right side of the box body 1. The left end of the output shaft of the motor 21 is connected to the threaded rod 32. The right end of the rod 32 is fixedly connected, and the input end of the motor 2 31 is electrically connected to the output end of the control switch group 7. At the same time, the control switch group 7 is regulated, and the motor 1 21 rotates counterclockwise to retract the rope 24. When the rope 24 is contracting, the rope 24 is located in one place for contraction. By controlling the switch group 7 and operating the motor 2 31, the output shaft of the motor 2 31 drives the threaded rod 32 to rotate, and then drives the threaded U-shaped slider 33 to move left and right, so that the roller 34 contacts the rope 24, and the rope 24 moves left and right when being retracted, and the rope 24 is evenly retracted on the bobbin 23.

[0030] The working principle of an electric hoist with a limiting structure provided by the utility model is as follows: first, the box body 1 is installed at the required lifting position through the mounting plate 5, and then the control switch group 7 is adjusted to operate the motor 21, and the output shaft of the motor 21 drives the rotating column 22 to rotate, and the rotating column 22 drives the wire drum 23 to rotate, and then the rope 24 is lowered. When lowering, the rotating column 22 rotates to drive the small gear 412 to rotate, and the small gear 412 rotates to drive the meshing large gear 403 to rotate, and then drives the screw rod 402 to rotate, and the screw rod 402 rotates to drive the threaded slider 404 to move to the right. When the slider 404 moves to the rightmost end of the screw rod 402, when the insertion strip 407 moves to the lower end of the socket 411, the insertion strip 407 is ejected and plugged into the socket 411 under the rebound action of the telescopic rod 405 and the spring 406, and the insertion strip 407 stops the slider 404 from moving, thereby causing the screw rod 402 to rotate, and the screw rod 402 stops The large gear 403 is stopped from rotating, and the large gear 403 stops the meshing small gear 412 from rotating, thereby stopping the rope 24 from moving downward, thereby realizing the limit locking of the rope 24, and then placing the goods on the hook 25, and then by regulating the control switch group 7, the electric push rod 409 operates, the telescopic end of the electric push rod 409 moves downward, and then drives the push block 410 to move downward, so that the push block 410 pushes out the insertion strip 407, so that the insertion strip 407 is separated from the socket 411, and at the same time, the control switch group 7 is regulated, and the motor 1 21 rotates counterclockwise to retract the rope 24. When the rope 24 is contracted, the rope 24 is located in one place for contraction, and by controlling the switch group 7, the motor 2 31 is operated, and the output shaft of the motor 2 31 drives the threaded rod 32 to rotate, thereby driving the threaded U-shaped slider 33 to move left and right, so that the roller 34 contacts the rope 24, and the rope 24 moves left and right when it is retracted, and the rope 24 is evenly retracted on the bobbin 23.

[0031] It is worth noting that the motor 1 21 and the motor 2 31 disclosed in the above embodiments, the motor 1 21 can be selected as 5Ik12RGU-CF, the motor 2 31 can be selected as KS-370, and the control switch group 7 is provided with switch buttons corresponding to the motor 1 21 and the motor 2 31 for controlling their switching operation.

[0032] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electric hoist with a limiting structure, characterized in that: It comprises a box body (1), a lifting mechanism (2) and a limiting mechanism (4); Box body (1): a left-right symmetrical mounting plate (5) is provided at the upper end thereof; The lifting mechanism (2) comprises a rotating column (22), a bobbin (23), a rope (24) and a hook (25). The rotating column (22) is rotatably connected between the left and right inner walls of the box body (1). The bobbin (23) is fixedly connected to the middle of the rotating column (22). The outside of the bobbin (23) is provided with a rope (24). The lower end of the rope (24) is provided with a hook (25). The limiting mechanism (4) is arranged inside the box body (1), and the limiting mechanism (4) is installed in coordination with the lifting mechanism (2).

2. The electric hoist with a limiting structure according to claim 1, characterized in that: An elastic rope (6) is provided at the lower end of the box body (1), and a control switch group (7) is fixedly connected to the lower end of the elastic rope (6), and an input end of the control switch group (7) is electrically connected to an external power supply.

3. The electric hoist with a limiting structure according to claim 2, characterized in that: The lifting mechanism (2) further comprises a motor 1 (21), wherein the motor 1 (21) is arranged at the left end of the box body (1), the right end of the output shaft of the motor 1 (21) is fixedly connected to the left end of the rotating column (22), and the input end of the motor 1 (21) is electrically connected to the output end of the control switch group (7).

4. The electric hoist with a limiting structure according to claim 2, characterized in that: The limiting mechanism (4) comprises a rectangular groove (401), a screw rod (402), a large gear (403), a slider (404) and a small gear (412); the upper end of the box body (1) is provided with a rectangular groove (401); the inside of the rectangular groove (401) is rotatably connected with the screw rod (402); the upper end of the screw rod (402) is threadedly connected with the slider (404); the right end of the screw rod (402) is fixedly connected with the large gear (403); the right end of the rotating column (22) is provided with a small gear (412); the large gear (403) is meshedly connected with the small gear (412).

5. The electric hoist with a limiting structure according to claim 4, characterized in that: The limiting mechanism (4) further comprises a telescopic rod (405), a spring (406) and an insertion strip (407); a slide groove is provided at the upper end of the slider (404); a front-rear symmetrical telescopic rod (405) is fixedly connected to the bottom wall of the slide groove; springs (406) are respectively sleeved on the outside of the telescopic rod (405); the insertion strip (407) is slidably connected to the inside of the slide groove; and the upper side of the telescopic end of the telescopic rod (405) is fixedly connected to the lower end of the insertion strip (407).

6. The electric hoist with a limiting structure according to claim 5, characterized in that: The limiting mechanism (4) further comprises a rectangular box (408), an electric push rod (409), a push block (410) and a socket (411); the rectangular box (408) is provided at the right end of the upper surface of the rectangular groove (401); the electric push rod (409) is provided at the upper end of the rectangular box (408); the push block (410) is fixedly connected to the telescopic end of the electric push rod (409); the socket (411) is provided at the right end of the upper surface of the rectangular groove (401); the insertion strip (407) and the push block (410) are both mounted in cooperation with the socket (411); the input end of the electric push rod (409) is electrically connected to the output end of the control switch group (7).

7. The electric hoist with a limiting structure according to claim 2, characterized in that: The invention also comprises a rope guiding mechanism (3), wherein the rope guiding mechanism (3) comprises a second motor (31), a threaded rod (32), a U-shaped slider (33) and a roller (34); a support bar is provided at the lower end of the box body (1); the threaded rod (32) is rotatably connected to the inside of the support bar; the upper end of the threaded rod (32) is threadedly connected to the U-shaped slider (33); the rear end of the U-shaped slider (33) is slidably connected to the inside of the support bar; the front end of the U-shaped slider (33) is rotatably connected to the roller (34) via a pin shaft; the outer arc surface of the roller (34) contacts the surface of the rope (24); the second motor (31) is arranged at the lower end of the right side surface of the box body (1); the left end of the output shaft of the second motor (31) is fixedly connected to the right end of the threaded rod (32); the input end of the second motor (31) is electrically connected to the output end of the control switch group (7).

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