Protective explosion-proof electric chain hoist for hoisting

Abstract

The utility model discloses a protective explosion-proof electric chain hoist for hoisting, which is characterized in that a support is fixedly mounted at one end of the bottom of an explosion-proof hoist, and a push switch is fixedly mounted in the middle of one end of the bottom of the support. After an object is lifted to a certain height, an extrusion block is extruded, and a push switch is pressed to start, so that a driving motor is controlled, the object does not continue to rise after reaching the certain height, equipment damage caused by collision between the lifted object and the hoist due to too high rising is prevented, and the use safety of the equipment is improved; and the movable rod plays a role in guiding the movement of the extrusion block, so that the extrusion block is not inclined and jammed when being pressed up, and the elastic soft cushion plays a role in buffering protection, so that the extrusion block does not generate violent impact on the push switch, and meanwhile, the elastic soft cushion pushes the extrusion block to reset.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof hoists, in particular to a protective explosion-proof chain electric hoist for lifting. Background Art

[0002] The explosion-proof electric hoist is a light and small lifting equipment with light weight, small size and large lifting capacity. The exposed explosion-proof parts of the hoist are made of special spark-free materials, and the explosion-proof performance is safe and reliable. When the factory is filled with explosive mixtures, it is a beneficial tool for improving working conditions and increasing labor productivity under the premise of ensuring safety. It is an essential mechanical equipment for production. The explosion-proof electric hoist is suitable for non-mining working faces of Class I explosion-proof coal mines and for Class II explosion-proof places with explosive gas mixtures composed of flammable gases or steam and air of levels IIA, IIB, and IIC, and temperature groups T1-T4. The working environment temperature is -25℃ to 40℃. It is suitable for indoor use. When used outdoors, protective devices are required.

[0003] However, the current explosion-proof hoist lacks a limit control protection mechanism. After the object is suspended and lifted to a certain height, the worker is on the ground and cannot accurately control the position at the height, which can easily cause the object to rise too high and collide with the explosion-proof hoist, causing damage to the equipment. Therefore, the utility model provides a protective explosion-proof chain electric hoist for lifting to meet people's needs. Utility Model Content

[0004] The utility model provides a protective explosion-proof chain electric hoist for lifting, which can effectively solve the problem that the explosion-proof hoist proposed in the above background technology lacks a protection mechanism for limit control. After the object is suspended and lifted to a certain height, the worker is located on the ground and has inaccurate control of the position at the height, which can easily cause the object to rise too high and collide with the explosion-proof hoist, causing damage to the equipment.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protective explosion-proof chain electric hoist for lifting, comprising an explosion-proof hoist, a driving motor fixedly mounted on one end of the explosion-proof hoist, a hook mounted on the top of the explosion-proof hoist, a lifting chain mounted in the middle of the explosion-proof hoist, a lifting hook fixedly connected to the bottom end of the lifting chain, a bracket fixedly mounted on one end of the bottom of the bracket, a press switch fixedly mounted on the middle of one end of the bottom of the bracket, movable rods symmetrically penetrated and mounted on both sides of one end of the bottom of the bracket, the tops of the two movable rods are fixedly connected to limited position circular blocks, the surfaces of the middle parts of the two movable rods are wrapped with elastic soft pads, and an extrusion block is fixedly connected between the bottom ends of the two movable rods;

[0006] Positioning frames are symmetrically fixedly installed at both ends of the top of the explosion-proof hoist, a mounting groove is opened in the middle of the positioning frame, a fixing frame is fitted on the top of the positioning frame, a positioning block is fixedly connected to the bottom end of the middle of the fixing frame, and splicing blocks are symmetrically fixedly connected at both ends of the fixing frame, mounting bolts are fixedly installed on the top and bottom of the splicing block, and a buffer pad is fixedly bonded to the surface of the splicing block.

[0007] Preferably, the two movable rods are symmetrically distributed on both sides of the push switch, the diameter of the limiting circle is larger than the diameter of the movable rod, and the signal output end of the push switch is connected to the signal input end of the drive motor.

[0008] Preferably, the top and bottom ends of the elastic cushion are connected to the bracket and the extrusion block respectively, and the extrusion block is located directly below the push switch, with a gap between the top end of the extrusion block and the bottom end of the push switch.

[0009] Preferably, the positioning block is movably embedded in the interior of the installation slot, the splicing block is fixedly connected to the fixing frame by means of mounting bolts, and the splicing blocks and buffer pads at both ends of the two fixing frames fit together.

[0010] Preferably, a mounting bracket is fixedly mounted on the top of the lifting hook, and a contact ring plate is fixedly connected to the top end of the mounting bracket.

[0011] Preferably, the lifting chain moves through the middle of the mounting frame and the contact ring plate in sequence, and the distance between the extrusion block and the lifting chain is the same as the distance between the contact ring plate and the lifting chain.

[0012] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention has a scientific and reasonable structure and is safe and convenient to use:

[0013] 1. It is equipped with a bracket, a push switch, a movable rod, a limit circle, an elastic pad and an extrusion block. Through the coordinated use of the elastic pad and the extrusion block, the lifting height of the object is monitored. After the object is lifted to a certain height, the extrusion block is squeezed, and the push switch is pressed to start, which controls the drive motor so that the object does not continue to rise after reaching a certain height, preventing the lifted object from rising too high and colliding with the hoist to cause damage to the equipment, thereby improving the safety of the equipment. The movable rod guides the movement of the extrusion block, so that the extrusion block will not be skewed or stuck when it is lifted and pressed, and the elastic pad plays a buffering and protective role, so that the extrusion block will not have a violent impact on the push switch, and the elastic pad will push the extrusion block to reset.

[0014] 2. A positioning frame, an installation slot, a positioning card block, a fixing frame, a splicing block, a mounting bolt and a buffer pad are provided. The positioning frame and the positioning card block are used in conjunction to position and install the fixing frame so that it is located on the top of the explosion-proof hoist. Then the splicing blocks and buffer pads at both ends extend outward, blocking both sides of the explosion-proof hoist. The splicing blocks and buffer pads are spliced ​​and coordinated with each other to provide buffering protection for the explosion-proof hoist. When the explosion-proof hoist is pulled forward, the splicing blocks and buffer pads will first collide with foreign objects on the travel path to prevent the explosion-proof hoist from directly colliding violently with external mechanisms when it moves to the end. The buffer pads will buffer and absorb the impact force generated during contact, thereby improving safety in use.

[0015] 3. A mounting frame and a contact ring plate are provided. By using the mounting frame and the contact ring plate in conjunction with each other, the accuracy of contact with the extrusion block is improved. When the lifting chain rotates during lifting, a certain position of the contact ring plate is always located below the extrusion block, thereby improving the accuracy of control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0017] In the attached figure:

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the installation structure of the mounting bracket of the utility model;

[0020] Figure 3 This is a schematic diagram of the installation structure of the positioning card block of the utility model;

[0021] Figure 4 This is a schematic diagram of the installation structure of the push switch of the utility model;

[0022] Numbers in the figure: 1. Explosion-proof hoist; 2. Driving motor; 3. Hook; 4. Lifting chain; 5. Lifting hook; 6. Bracket; 7. Press switch; 8. Movable rod; 9. Limiting circle block; 10. Elastic cushion; 11. Extrusion block; 12. Positioning frame; 13. Mounting slot; 14. Positioning block; 15. Fixing frame; 16. Splicing block; 17. Mounting bolt; 18. Buffer pad; 19. Mounting frame; 20. Contact ring plate. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0024] Example: Figure 1-4 As shown, the utility model provides a technical solution, a protective explosion-proof chain electric hoist for lifting, including an explosion-proof hoist 1, one end of the explosion-proof hoist 1 is fixedly installed with a driving motor 2, the top of the explosion-proof hoist 1 is installed with a hook 3, the middle of the explosion-proof hoist 1 is installed with a lifting chain 4, the bottom end of the lifting chain 4 is fixedly connected with a lifting hook 5, one end of the bottom of the explosion-proof hoist 1 is fixedly installed with a bracket 6, the middle of one end of the bottom of the bracket 6 is fixedly installed with a press switch 7, and the two sides of the bottom end of the bracket 6 are symmetrically penetrated with movable rods 8. The tops of the two movable rods 8 are fixedly connected with limited position circular blocks 9, and the two movable rods 8 are symmetrically distributed on both sides of the press switch 7. The diameter of the limit circular blocks 9 is larger than the diameter of the movable rods 8. The signal output end of the press switch 7 is connected to the signal input end of the driving motor 2, the surface of the middle part of the two movable rods 8 is wrapped with an elastic soft pad 10, and an extrusion block 11 is fixedly connected between the bottom ends of the two movable rods 8. The top and bottom ends of the pad 10 are connected to the bracket 6 and the extrusion block 11 respectively. The extrusion block 11 is located just below the press switch 7. A gap is left between the top of the extrusion block 11 and the bottom end of the press switch 7. Through the cooperation of the elastic soft pad 10 and the extrusion block 11, the height of the object lifting is monitored. After the object is lifted to a certain height, the extrusion block 11 is squeezed, and the press switch 7 is pressed to start, which controls the drive motor 2 so that the object does not continue to rise after reaching a certain height, preventing the lifted object from rising too high and colliding with the hoist to cause damage to the equipment, thereby improving the safety of the equipment. The movable rod 8 guides the movement of the extrusion block 11, so that the extrusion block 11 will not be skewed or stuck when it is pressed. The elastic soft pad 10 plays a buffering and protective role, so that the extrusion block 11 will not produce a violent impact on the press switch 7, and the elastic soft pad 10 will push the extrusion block to reset.

[0025] The two ends of the top of the explosion-proof hoist 1 are symmetrically fixed with positioning frames 12, and a mounting groove 13 is opened in the middle of the positioning frame 12. A fixing frame 15 is fitted on the top of the positioning frame 12, and a positioning block 14 is fixedly connected to the bottom end of the middle of the fixing frame 15. The two ends of the fixing frame 15 are symmetrically fixed with splicing blocks 16, and the top and bottom of the splicing blocks 16 are fixedly installed with mounting bolts 17. A buffer pad 18 is fixedly bonded to the surface of the splicing block 16. The positioning block 14 is movably embedded in the interior of the mounting groove 13. The splicing block 16 is fixedly connected to the fixing frame 15 by the mounting bolts 17. The splicing blocks 16 and the buffer pads 18 at both ends of the two fixing frames 15 fit each other. By cooperating with the positioning frame 12 and the positioning card block 14, the fixing frame 15 is positioned and installed so that it is located at the top of the explosion-proof hoist 1, and then the splicing blocks 16 and the buffer pads 18 at both ends extend outward to block the two sides of the explosion-proof hoist 1. The splicing blocks 16 and the buffer pads 18 are spliced ​​and matched with each other, which plays a buffering and protective role for the explosion-proof hoist 1. When the explosion-proof hoist 1 is pulled and moved, the splicing blocks 16 and the buffer pads 18 will first collide with foreign objects on the travel path, preventing the explosion-proof hoist 1 from directly colliding violently with external mechanisms when moving to the end. The buffer pads 18 will buffer and absorb the impact force generated during the contact, thereby improving safety in use;

[0026] A mounting bracket 19 is fixedly installed on the top of the lifting hook 5, and a contact ring plate 20 is fixedly connected to the top of the mounting bracket 19. The lifting chain 4 moves in sequence through the middle of the mounting bracket 19 and the contact ring plate 20. The distance between the extrusion plate 11 and the lifting chain 4 is the same as the distance between the contact ring plate 20 and the lifting chain 4. Through the coordinated use of the mounting bracket 19 and the contact ring plate 20, the accuracy of the contact with the extrusion block 11 is improved. When the lifting chain 4 rotates during lifting, a certain position of the contact ring plate 20 is always located below the extrusion block 11, thereby improving the accuracy of control.

[0027] The working principle and usage process of the utility model are as follows: first, the staff takes two fixing brackets 15 and places them on the top of the explosion-proof hoist 1 from two directions respectively, and the positioning block 14 is movably inserted into the inside of the mounting groove 13, which plays a role in positioning and stabilizing the fixing bracket 15, so that the fixing bracket 15 is spliced ​​and installed on the top of the positioning frame 12, and the two ends of the fixing bracket 15 extend outward, so that the splicing blocks 16 and the buffer pads 18 at both ends extend to both sides of the explosion-proof hoist 1, and the two ends of the two fixing brackets 15 correspond to each other, so that the splicing blocks 16 and the buffer pads 18 at both ends are spliced ​​and fit with each other, intercepting and blocking on both sides of the explosion-proof hoist 1, and then the staff uses the hook 3 to fix the explosion-proof hoist 1 on the driving and traction equipment;

[0028] The external driving traction equipment pulls the explosion-proof hoist 1 to move it above the object that needs to be lifted. The driving motor 2 starts and controls the explosion-proof hoist 1, so that the lifting chain 4 is lengthened downward, and the object is hung by the lifting hook 5. The driving motor 2 reels the lifting chain 4, which can pull the object upward. The mounting frame 19 is fixed to the top of the lifting hook 5, so that the contact ring plate 20 rises together with it. The contact ring plate 20 surrounds the outside of the lifting chain 4. When the position of the lifting chain 4 is deflected, the position of the contact ring plate 20 remains unchanged until the contact ring plate 20 contacts the extrusion block 11 and continues to rise, squeezing and pushing the extrusion block 11. The moving rod 8 and the extrusion block 11 rise synchronously, the elastic cushion 10 is compressed, and the extrusion block 11 presses the bottom end of the press switch 7. The press switch 7 controls the drive motor 2 to stop running and no longer pulls the object up. Then the external driving traction equipment will pull the explosion-proof hoist 1 to move, so that the suspended objects are transported to the predetermined position. If there is a foreign object on the travel track of the explosion-proof hoist 1 or it travels to the end of the traction device, the splicing block 16 and the buffer pad 18 will first contact and collide with the foreign object. The buffer pad 18 absorbs the impact caused by the collision. The splicing block 16 and the buffer pad 18 protect the explosion-proof hoist 1 so that it will not directly collide with foreign objects.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A protective explosion-proof chain electric hoist for lifting, comprising an explosion-proof hoist (1), characterized in that: A driving motor (2) is fixedly installed at one end of the explosion-proof hoist (1), a hook (3) is installed at the top of the explosion-proof hoist (1), a lifting chain (4) is installed in the middle of the explosion-proof hoist (1), and a lifting hook (5) is fixedly connected to the bottom end of the lifting chain (4). A bracket (6) is fixedly installed at one end of the bottom of the explosion-proof hoist (1), a push switch (7) is fixedly installed in the middle of one end of the bottom of the bracket (6), and movable rods (8) are symmetrically installed on both sides of the bottom end of the bracket (6), and the tops of the two movable rods (8) are fixedly connected to limited position circular blocks (9), the surfaces of the middle parts of the two movable rods (8) are wrapped with elastic soft pads (10), and an extrusion block (11) is fixedly connected between the bottom ends of the two movable rods (8); Positioning frames (12) are symmetrically fixedly installed at both ends of the top of the explosion-proof hoist (1), a mounting groove (13) is provided in the middle of the positioning frame (12), a fixing frame (15) is fitted on the top of the positioning frame (12), a positioning block (14) is fixedly connected to the bottom end of the middle of the fixing frame (15), and splicing blocks (16) are symmetrically fixedly connected at both ends of the fixing frame (15), mounting bolts (17) are fixedly installed on the top and bottom of the splicing block (16), and a buffer pad (18) is fixedly bonded to the surface of the splicing block (16).

2. The protective explosion-proof electric chain hoist for lifting according to claim 1, characterized in that: The two movable rods (8) are symmetrically distributed on both sides of the push switch (7); the diameter of the limiting circular block (9) is larger than the diameter of the movable rod (8); and the signal output end of the push switch (7) is connected to the signal input end of the drive motor (2).

3. The protective explosion-proof electric chain hoist for lifting according to claim 1, characterized in that: The top and bottom ends of the elastic cushion (10) are connected to the bracket (6) and the extrusion block (11) respectively. The extrusion block (11) is located directly below the push switch (7). A gap is left between the top end of the extrusion block (11) and the bottom end of the push switch (7).

4. The protective explosion-proof electric chain hoist for lifting according to claim 1, characterized in that: The positioning block (14) is movably embedded in the interior of the mounting groove (13); the splicing block (16) is fixedly connected to the fixing frame (15) via a mounting bolt (17); and the splicing blocks (16) and the buffer pads (18) at both ends of the two fixing frames (15) fit together.

5. The protective explosion-proof electric chain hoist for lifting according to claim 1, characterized in that: A mounting frame (19) is fixedly mounted on the top of the lifting hook (5), and a contact ring plate (20) is fixedly connected to the top of the mounting frame (19).

6. The protective explosion-proof electric chain hoist for lifting according to claim 5, characterized in that: The lifting chain (4) moves through the middle of the mounting frame (19) and the contact ring plate (20) in sequence, and the distance between the extrusion block (11) and the lifting chain (4) is the same as the distance between the contact ring plate (20) and the lifting chain (4).

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