Explosion-proof electric hoist

Abstract

The utility model provides an explosion-proof type electric hoist which comprises a moving frame matched with an I-shaped steel rail, a lifting driving mechanism and a lifting sling, the lifting driving mechanism and the lifting sling are arranged on the lower side of the moving frame, the lifting driving mechanism comprises a lifting winding drum and a winding drum driving motor, and the lifting winding drum is connected with the lifting sling through a steel wire rope. The lifting appliance comprises a lifting mechanism connected with a heavy object and a first pulley yoke connected with the steel wire rope, a second pulley yoke corresponding to the first pulley yoke is arranged on the lower side of the movable frame, at least two groups of movable pulleys are arranged on the first pulley yoke, and a plurality of fixed pulleys are arranged on the second pulley yoke; a steel wire rope led out of the lifting winding drum sequentially winds around the movable pulleys and the fixed pulleys and is fixedly connected with the second pulley yoke. According to the anti-explosion electric hoist, the first pulley yoke and the second pulley yoke are arranged, a single steel wire rope led out of the lifting winding drum is adjusted into a plurality of lifting points to be connected with a lifting sling, and the stability of the structure is effectively improved.

Description

Technical Field

[0001] The utility model relates to a hoisting device, specifically an explosion-proof electric hoist. Background Art

[0002] An explosion-proof electric hoist is a light and small hoisting device, which has the advantages of light self-weight, small volume and large hoisting capacity. In order to achieve the explosion-proof effect, the exposed explosion-proof parts of the explosion-proof electric hoist are usually made of special non-sparking materials. At present, there are many explosion-proof electric hoists on the market. For example, the chain electric hoist with explosion-proof effect disclosed in Chinese Patent CN217627352U, and a European-style explosion-proof electric hoist disclosed in Chinese Patent CN210001517U, etc. However, the steel wire ropes and chains of these electric hoists are directly connected to the lifting appliances, and the stability during the lifting process is relatively poor.

[0003] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an explosion-proof electric hoist.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An explosion-proof electric hoist includes a moving frame that cooperates with an I-beam track, a lifting drive mechanism and a lifting appliance arranged on the lower side of the moving frame. The lifting drive mechanism includes a lifting drum and a drum drive motor. The lifting drum and the lifting appliance are connected by a steel wire rope. The lifting appliance includes a lifting connection mechanism for connecting with a heavy object and a first pulley frame for connecting with the steel wire rope. A second pulley frame is arranged corresponding to the first pulley frame on the lower side of the moving frame. At least two groups of movable pulleys are arranged on the first pulley frame, and several fixed pulleys are arranged on the second pulley frame. The steel wire rope led out from the lifting drum sequentially passes around each movable pulley and fixed pulley and is fixedly connected to the second pulley frame.

[0007] The first pulley frame includes a front mounting plate and a rear mounting plate. At least three groups of connecting shafts are arranged between the front mounting plate and the rear mounting plate. The connecting shafts are arranged in two rows, one above the other. Among them, at least one connecting shaft is located on the lower side, and the other connecting shafts are located on the upper side. The connecting shafts in the upper row are connected to the movable pulleys one by one, and the connecting shaft on the lower side is connected to the lifting connection mechanism.

[0008] Both sides of the front mounting plate and the rear mounting plate are respectively connected by connecting seats. Each connecting shaft is located between the two connecting seats. The connecting seats are provided with through holes corresponding to the steel wire rope, and the steel wire rope is arranged through the through holes during the winding process.

[0009] The second pulley frame includes a front side plate and a rear side plate, which are connected by a number of connecting columns. The connecting column on the upper side is connected to the moving frame. The connecting columns on both sides are respectively connected to the ends of the hoisting drum and the steel wire rope. The connecting column in the middle is rotatably connected to the fixed pulley.

[0010] The moving frame includes a traveling motor, a front connecting plate and a rear connecting plate. Traveling wheels are respectively arranged on the front connecting plate and the rear connecting plate. The traveling wheels are tangent to the upper surface of the lower flange of the I-beam track. One of the traveling wheels is drivingly connected to the traveling motor.

[0011] Notches are respectively arranged on both sides of the front connecting plate and the rear connecting plate. First guide wheels are arranged in the notches. The first guide wheels are tangent to the side surface of the lower flange of the I-beam track.

[0012] A guide frame is arranged on the lower side of the hoisting drum. A number of second guide wheels are arranged in the guide frame. The gap between two adjacent second guide wheels forms a channel for the steel wire rope to pass through.

[0013] A contact switch is arranged on the upper side of the first pulley frame. A contact plate is arranged on the lower side of the guide frame corresponding to the contact switch.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows. The explosion-proof electric hoist provided by the present utility model adjusts the single steel wire rope led out by the hoisting drum to be connected to the hoisting sling through multiple suspension points by setting the first pulley frame and the second pulley frame, effectively improving the stability of the structure. Specifically, the steel wire rope led out by the hoisting drum winds around the pulleys of the first pulley frame and the second pulley frame. The stability of the connection structure between the steel wire rope and the sling is increased through the pulley design, and further the stability during the hoisting process is increased. Description of the Drawings

[0015] Figure 1 is the schematic structural diagram (one) of the present utility model.

[0016] Figure 2 is the schematic structural diagram (two) of the present utility model.

[0017] In the figure: 1. I-beam track; 2. Moving frame; 201. Traveling motor; 202. Front connecting plate; 203. Traveling wheel; 204. First guide wheel; 3. Hoisting drive mechanism; 301. Hoisting drum; 302. Drum drive motor; 4. Hoisting sling; 5. First pulley frame; 501. Front mounting plate; 502. Rear mounting plate; 503. Connecting seat; 504. Contact switch; 6. Second pulley frame; 7. Guide frame; 8. Steel wire rope. Detailed Embodiments

[0018] The technical solutions of the present utility model will be further described in detail below through specific embodiments.

[0019] In the description of the utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. "Installation", "provided with", "connection", etc. can adopt conventional means in the prior art, such as: integral setting, snap-in installation, welded connection, adhesive connection, bolt connection, etc. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances, and suitable connection, setting or installation methods can be selected in the prior art.

[0020] As Figure 1-2 shown, an explosion-proof electric hoist includes a moving frame 2 cooperating with an I-beam track 1, a hoisting drive mechanism 3 and a hoisting sling 4 provided on the lower side of the moving frame 2. The hoisting drive mechanism 3 includes a hoisting drum 301 and a drum drive motor 302. A steel wire rope 8 is connected between the hoisting drum 301 and the hoisting sling 4. The sling includes a hanging mechanism connected to a heavy object and a first pulley frame 5 connected to the steel wire rope 8. A second pulley frame 6 is provided corresponding to the first pulley frame 5 on the lower side of the moving frame 2. At least two groups of movable pulleys are provided on the first pulley frame 5, and a number of fixed pulleys are provided on the second pulley frame 6. The steel wire rope 8 led out from the hoisting drum 301 sequentially passes around each movable pulley and fixed pulley and is fixedly connected to the second pulley frame 6.

[0021] By providing the first pulley frame and the second pulley frame, the single steel wire rope led out from the hoisting drum is adjusted to be connected to the hoisting sling at multiple hanging points, effectively improving the stability of the structure. Specifically, the steel wire rope led out from the hoisting drum passes around the pulleys of the first pulley frame and the second pulley frame. Through the pulley design, the stability of the connection structure between the steel wire rope and the sling is increased, and further the stability during the hoisting process is increased.

[0022] In one embodiment, the first pulley frame 5 includes a front mounting plate 501 and a rear mounting plate 502. At least three groups of connecting shafts are provided between the front mounting plate 501 and the rear mounting plate 502. The connecting shafts are arranged in two rows up and down. Among them, at least one connecting shaft is located on the lower side, and the other connecting shafts are located on the upper side. The connecting shafts in the upper row are respectively connected to the movable pulleys one by one, and the connecting shafts on the lower side are connected to the hanging mechanism. Specifically, the pulley is rotatably connected to the connecting shaft, and the specific installation method of the pulley adopts the installation method of the prior art.

[0023] In one embodiment, both sides of the front mounting plate 501 and the rear mounting plate 502 are respectively connected through connecting seats 503. Each connecting shaft is located between the two connecting seats 503. The connecting seats 503 are provided with through holes corresponding to the steel wire ropes 8, and the steel wire ropes 8 are arranged to pass through the through holes during the winding process.

[0024] In one embodiment, the second pulley frame 6 includes a front side plate and a rear side plate, which are connected through a plurality of connecting columns. The connecting column located on the upper side is connected to the moving frame 2. The connecting columns located on both sides are respectively connected to the ends of the hoisting drum 301 and the steel wire ropes 8. The connecting column located in the middle is rotatably connected to the fixed pulley. Specifically, during the hoisting process, the upper and lower parts of the first pulley frame and the second pulley frame are basically aligned.

[0025] In one embodiment, the moving frame 2 includes a traveling motor 201, a front connecting plate 202 and a rear connecting plate. Traveling wheels 203 are respectively arranged on the front connecting plate 202 and the rear connecting plate. The traveling wheels 203 are tangent to the upper surface of the lower flange of the I-beam track 1. One of the traveling wheels 203 is in transmission connection with the traveling motor 201. During use, the traveling wheels are driven by the motor to move along the I-beam track.

[0026] In one embodiment, notches are respectively arranged on both sides of the front connecting plate 202 and the rear connecting plate. First guide wheels 204 are arranged in the notches. The first guide wheels 204 are tangent to the side surface of the lower flange of the I-beam track 1, and the guiding effect of the guide wheels is used to improve the stability of the movement of the moving frame.

[0027] In one embodiment, a guide frame 7 is arranged on the lower side of the hoisting drum 301. A plurality of second guide wheels are arranged in the guide frame 7. The gaps between adjacent second guide wheels form channels for the steel wire ropes 8 to pass through, further constraining and guiding the steel wire ropes to improve the stability of the structure. Specifically, the guide frame is fixedly connected to the outer shell of the hoisting drum.

[0028] In one embodiment, a contact switch 504 is arranged on the upper side of the first pulley frame 5. The contact switch is the control switch of the hoisting motor, controlling the opening and closing of the hoisting motor. A contact plate is arranged on the lower side of the guide frame 7 corresponding to the contact switch 504. When the contact head of the contact switch abuts against the contact plate, the hoisting motor stops working to avoid collision during continued upward movement. Specifically, the control circuit and the connection circuit of the contact switch both adopt existing technologies and are not improved.

[0029] The above embodiments can be combined with each other.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. An explosion-proof electric hoist, comprising a moving frame that cooperates with an I-beam track, a lifting drive mechanism arranged on the lower side of the moving frame, and a lifting sling. The lifting drive mechanism includes a lifting drum and a drum drive motor. The lifting drum and the lifting sling are connected by a steel wire rope. It is characterized in that: The sling includes a lifting mechanism connected to the heavy object and a first pulley frame connected to the wire rope. A second pulley frame is arranged on the lower side of the movable frame corresponding to the first pulley frame. At least two sets of movable pulleys are arranged on the first pulley frame, and a plurality of fixed pulleys are arranged on the second pulley frame. The wire rope led out from the lifting drum is successively wound around each movable pulley and fixed pulley and fixedly connected to the second pulley frame.

2. The explosion-proof electric hoist according to claim 1, wherein: The first pulley frame includes a front mounting plate and a rear mounting plate, and at least three groups of connecting shafts are arranged between the front mounting plate and the rear mounting plate. The connecting shafts are arranged in two rows, upper and lower, wherein at least one connecting shaft is located on the lower side, and the other connecting shafts are located on the upper side. The row of connecting shafts on the upper side is connected to the movable pulleys one by one, and the connecting shafts on the lower side are connected to the lifting mechanism.

3. The explosion-proof electric hoist according to claim 2, wherein: The front mounting plate and the rear mounting plate are connected at both sides by connecting seats respectively, each connecting shaft is located between the two connecting seats, and the connecting seats are provided with through holes corresponding to the steel wire ropes, and the steel wire ropes pass through the through holes during the rope winding process.

4. The explosion-proof electric hoist according to claim 3, characterized in that: The second pulley frame includes a front side plate and a rear side plate, which are connected by a number of connecting columns. The connecting column on the upper side is connected to the movable frame, the connecting columns on both sides are respectively connected to the lifting drum and the ends of the wire rope, and the connecting column in the middle is rotatably connected to the fixed pulley.

5. The explosion-proof electric hoist according to claim 4, characterized in that: The mobile frame includes a travel motor, a front connecting plate and a rear connecting plate. The front connecting plate and the rear connecting plate are respectively provided with travel wheels, which are tangent to the upper surface of the lower wing plate of the I-beam track. One of the travel wheels is drivingly connected to the travel motor.

6. The explosion-proof electric hoist according to claim 5, characterized in that: Notches are respectively arranged on both sides of the front connecting plate and the rear connecting plate, and first guide wheels are arranged in the notches. The first guide wheels are tangent to the side surfaces of the lower wing plates of the I-beam rails.

7. The explosion-proof electric hoist according to claim 6, characterized in that: A guide frame is arranged at the lower side of the lifting drum, and a plurality of second guide wheels are arranged inside the guide frame. The gap between two adjacent second guide wheels forms a channel for accommodating the wire rope to pass through.

8. The explosion-proof electric hoist according to claim 7, characterized in that: A contact switch is arranged on the upper side of the first pulley frame, and a contact plate is arranged on the lower side of the guide frame corresponding to the contact switch.

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