Forced braking device for crown block

Abstract

The utility model relates to the technical field of crown blocks, and discloses a crown block forced braking device which comprises a forced braking device body, and the forced braking device body comprises a base. The dustproof structure can prevent dust or foreign matter from falling onto the brake shoe, so that the brake shoe can be protected, a ventilation opening and a dustproof assembly connected to the ventilation opening are arranged in the dustproof structure, and the dustproof assembly comprises a frame and a dustproof net connected into the frame. Heat generated when the hydraulic electromagnet works and heat generated by friction between the brake shoe and the brake wheel can be conveniently dissipated to the external environment through the ventilation opening, the dustproof net can prevent dust and foreign matter from falling onto the brake shoe, meanwhile, the dustproof net cannot prevent heat dissipation, and therefore the service life of the forced braking device can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of overhead cranes, in particular to an overhead crane forced braking device. Background Art

[0002] Overhead cranes, also known as bridge cranes, are a type of lifting equipment used horizontally above workshops, warehouses, and material yards to lift materials. With their ends resting on tall concrete columns or metal supports, their bridge-like shape allows them to fully utilize the space beneath the bridge for lifting operations, unhindered by ground-based equipment. With their exceptional load capacity, large spans, flexible operation, safety, space-saving design, and economical and maintenance-friendly features, bridge cranes have become indispensable equipment for all types of heavy-load handling and lifting operations. Overhead crane braking refers to the function of the overhead crane (bridge crane) to decelerate, stop, or maintain the hoisting mechanism, trolley, and carriage mechanisms during operation through the use of brakes.

[0003] Patent publication number CN214465703U discloses a crane brake device comprising a bracket, on which a left brake arm, a right brake arm, and a hydraulic electromagnet are arranged, from left to right, in sequence. A brake wheel and brake shoe are disposed between the left and right brake arms. The output shaft of the hydraulic electromagnet is hingedly connected to a lever plate, which is connected to the right brake arm and a screw. The right brake arm is provided with a spring frame, which contains a pull rod and a spring. The other end of the pull rod is connected to the left brake arm, and the other end of the screw is hingedly connected to the left brake arm. The lever plate is provided with a mounting hole, in which a sleeve is fitted, and a pin is fitted within the sleeve, which connects the screw. This significantly reduces wear on the lever plate mounting hole caused by the pin connecting the lever plate and the screw, thereby increasing the service life of the lever plate, reducing the number of crane brake failures, and avoiding safety hazards.

[0004] However, the braking device in the above technology still has the following problems:

[0005] The braking device improves the connection method of the pin connecting the lever plate and the screw, which can increase the service life of the lever plate. At the same time, braking is performed by the hydraulic electromagnet to achieve the purpose of forced braking. When the forced braking device brakes the overhead crane, friction will occur between the brake shoe and the brake wheel. When the forced braking device is working, if dust or foreign matter adheres to the friction surface of the brake shoe, the original friction coefficient will be changed. The abnormal change in friction force will directly affect the braking effect, making the braking process not smooth enough and may even cause brake failure. In addition, it will accelerate the wear of the brake shoe, which will bring safety hazards and economic losses. Utility Model Content

[0006] (1) Technical problems solved

[0007] In view of the deficiencies of the prior art, the utility model provides a forced braking device for an overhead crane, which prevents dust or foreign matter from falling onto the brake shoe.

[0008] (2) Technical solution

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a forced braking device for an overhead crane, comprising a forced braking device body, the forced braking device body comprising a base, and a dustproof structure installed on the forced braking device body.

[0010] Preferably, the dustproof structure includes a dustproof cover connected to the base, the dustproof cover is composed of two parts on the left and right sides, the bottom outer side of the dustproof cover is connected with a flange ring around, the flange ring is provided with a connecting hole, and the corresponding base is provided with a fixing hole corresponding to the connecting hole, and the front and rear walls of the dustproof cover are provided with a through hole.

[0011] Preferably, a groove is provided at the contact surface where the right part of the dust cover contacts the left part, and a protrusion matching the groove is connected to the contact surface of the corresponding left part.

[0012] Preferably, mounting ears are connected to the tops of the left and right parts of the dust cover near the grooves and protrusions.

[0013] Preferably, ventilation holes are provided on the top and left and right side walls of the dust cover, and dustproof components are connected to the ventilation holes.

[0014] Preferably, the dustproof assembly includes a frame and a dustproof net connected to the frame.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This type of overhead crane forced braking device is provided with a dustproof structure, which can prevent dust or foreign matter from falling onto the brake shoe, thereby protecting the brake shoe.

[0018] 2. This type of overhead crane forced braking device, by providing ventilation holes and dust-proof nets on the dust-proof structure, does not affect the heat dissipation of the forced braking device body and can prevent dust and foreign matter from falling onto the brake shoe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a forced braking device for an overhead crane according to the present utility model;

[0020] Figure 2 This is a structural diagram of the main body of a forced braking device in a forced braking device for an overhead crane according to the present invention;

[0021] Figure 3 This is a schematic structural diagram of a dustproof structure in a forced braking device of an overhead crane according to the present invention;

[0022] Figure 4 This is a kind of forced braking device of overhead crane Figure 3 Schematic diagram of the structure enlarged at point A in the middle.

[0023] In the figure: 1. Forced braking device body; 2. Base; 3. Dustproof structure; 4. Dust cover; 5. Flange ring; 6. Connection hole; 7. Fixing hole; 8. Through hole; 9. Groove; 10. Protrusion; 11. Mounting ear; 12. Ventilation port; 13. Dustproof component; 14. Frame; 15. Dustproof net. DETAILED DESCRIPTION

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

[0025] Example

[0026] like Figure 1 As shown, a forced braking device for an overhead crane includes a forced braking device body 1 , the forced braking device body 1 includes a base 2 , and a dustproof structure 3 is installed on the forced braking device body 1 .

[0027] Specifically, dust or foreign matter has a great impact on the braking effect and service life of the brake shoe. By setting up the dustproof structure 3, the dustproof structure 3 can prevent dust or foreign matter from falling onto the brake shoe, thereby protecting the brake shoe.

[0028] like Figure 2 and Figure 3 As shown, the dustproof structure 3 includes a dust cover 4 connected to the base 2, and the dust cover 4 is composed of two parts, a left part and a right part. The outer side of the bottom of the dust cover 4 is connected with a flange ring 5, and a connecting hole 6 is provided on the flange ring 5. The corresponding base 2 is provided with a fixing hole 7 corresponding to the connecting hole 6, and the front and rear walls of the dust cover 4 are provided with a through hole 8.

[0029] Specifically, the dust cover 4 can cover the forced braking device body 1, and the dust cover 4 can prevent dust or foreign matter from falling onto the brake shoe. The dust cover 4 is composed of two parts, left and right. During installation, first place a part of the dust cover 4 on the base 2, and then place the other part of the remaining dust cover 4 next to the front part on the base 2 to form a complete dust cover 4. Due to the presence of the brake wheel, such a setting can facilitate the installation of the dust cover 4. By providing a flange ring 5 connected to the outer side of the bottom of the dust cover 4, the dust cover 4 can be conveniently connected to the base 2. At the same time, due to the presence of the flange ring 5, the dust cover 4 can be placed more stably on the base 2. By opening a connecting hole 6 on the flange ring 5 and a corresponding fixing hole 7 on the base 2, the dust cover 4 can be conveniently fixed above the base 2 using fixing tools such as bolts and nuts. By opening a through hole 8 on the front and rear walls of the dust cover 4, the through hole 8 can facilitate the placement of the brake wheel.

[0030] like Figure 3 and Figure 4 As shown, a groove 9 is provided at the contact surface between the right and left parts of the dust cover 4 , and a protrusion 10 matching the groove 9 is connected to the contact surface of the corresponding left part.

[0031] Specifically, at the contact surface of the left and right parts of the dust cover 4, a groove 9 is opened on one side of the dust cover 4, and a protrusion 10 matching the groove 9 is connected to the dust cover 4 on the other side. By setting the groove 9 and the protrusion 10, when the dust cover 4 is placed, the left and right parts of the dust cover 4 can be placed in matching positions, so that the left and right parts of the dust cover 4 will not be placed crooked. Through the cooperation of the groove 9 and the protrusion 10, no cracks will be left at the contact surface of the left and right parts of the dust cover 4, and no dust or foreign matter will fall from here onto the brake shoe.

[0032] like Figure 3 and Figure 4 As shown, mounting ears 11 are connected to the tops of the left and right parts of the dust cover 4 near the groove 9 and the protrusion 10.

[0033] Specifically, when the forced braking device body 1 performs a braking operation on the overhead crane, vibration will be generated. By providing a mounting ear 11 and connecting two mounting ears 11 together, the left and right parts of the dust cover 4 will not be cracked, thereby making the dust cover 4 more firmly installed on the base 2. When in use, the two mounting ears 11 can be connected with bolts and nuts, or with ropes, etc. There are various connection methods, and the illustrations are for reference only.

[0034] like Figure 1 、 Figure 2 and Figure 4As shown, ventilation holes 12 are provided on the top and left and right side walls of the dust cover 4 , and dustproof components 13 are connected to the ventilation holes 12 .

[0035] Specifically, when the forced braking device body 1 brakes the overhead crane, the hydraulic electromagnet generates heat when it works, and the friction between the brake shoe and the brake wheel generates heat. By setting the ventilation port 12, the heat generated by the hydraulic electromagnet when it works and the heat generated by the friction between the brake shoe and the brake wheel can be conveniently dissipated to the external environment, thereby protecting the forced braking device body 1. By setting a dustproof component 13 at the ventilation port 12, the dustproof component 13 can prevent dust and foreign matter from falling onto the brake shoe. At the same time, the dustproof component 13 will not affect the heat dissipation of the forced braking device body 1.

[0036] like Figure 3 As shown, the dustproof assembly 13 includes a frame 14 and a dustproof net 15 connected to the frame 14 .

[0037] Specifically, by setting up a dustproof component 13 including a frame 14 and a dustproof net 15 connected to the frame 14, wherein the frame 14 facilitates connecting the dustproof component 13 to the vent 12, the dustproof net 15 can prevent dust and foreign matter from falling onto the brake shoe, and the dustproof net 15 can also ventilate and dissipate heat.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A forced braking device for an overhead crane, comprising a forced braking device body (1), wherein the forced braking device body (1) comprises a base (2), and is characterized in that: A dustproof structure (3) is installed on the forced braking device body (1); The dustproof structure (3) includes a dustproof cover (4) connected to the base (2), the dustproof cover (4) is composed of two parts, the left and right parts are spliced ​​together, the outer sides of the bottom of the dustproof cover (4) are connected with a flange ring (5), the flange ring (5) is provided with a connecting hole (6), and the corresponding base (2) is provided with a fixing hole (7) corresponding to the connecting hole (6), and the front and rear walls of the dustproof cover (4) are provided with a through hole (8).

2. The forced braking device for an overhead crane according to claim 1, characterized in that: A groove (9) is provided at the contact surface between the right part and the left part of the dust cover (4), and a protrusion (10) matching the groove (9) is connected to the contact surface of the corresponding left part.

3. The forced braking device for an overhead crane according to claim 1, characterized in that: Mounting ears (11) are connected to the tops of the left and right parts of the dust cover (4) near the groove (9) and the protrusion (10).

4. The forced braking device for an overhead crane according to claim 1, characterized in that: The top and left and right side walls of the dust cover (4) are each provided with a ventilation opening (12), and the ventilation opening (12) is connected to a dustproof assembly (13).

5. The forced braking device for an overhead crane according to claim 4, characterized in that: The dustproof component (13) comprises a frame (14) and a dustproof net (15) connected inside the frame (14).

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