A crane drum pressure loss brake safety locking device

Abstract

The utility model discloses a crane drum pressure -loss braking safety locking device belongs to crane drum technical field, and its technical scheme main points include drum body and pivot, both sides of drum body are provided with locking mechanism, the inside of locking mechanism is provided with the clamping mechanism, the clamping mechanism includes a plurality of clamping blocks, slot, magnetic attraction strip and fixed ring, the slot is set up in the inside of fixed ring, the clamping block mobilely inserts in the inside of slot, has solved the inconvenient replacement of the easy wearing parts of the safety locking structure of the brake friction piece, locking dog, spring, pin shaft in the brake safety locking structure inside, after wearing, the replacement is more time -consuming and labor -intensive, and the maintenance efficiency of crane is influenced, and then influence crane normal use, especially in the actual situation of the tight construction period, possibly lead to the problem of the chain loss such as engineering delay, lease cost increase.

Description

Technical Field

[0001] This utility model relates to the field of crane drum technology, and in particular to a crane drum underpressure braking safety locking device. Background Technology

[0002] The crane drum pressure loss braking safety locking device is a safety protection device installed on the crane drum. Its core function is to quickly lock the drum rotation in the event of system pressure loss, such as power interruption, insufficient hydraulic or air pressure, or abnormal working conditions, to prevent the heavy object from falling accidentally and to ensure the safety of equipment and personnel.

[0003] The drum of a winch needs to be relatively long and have a large installation space. The brake disc is usually installed on one side of the drum. During braking, the end of the drum is subjected to greater force, which makes the overall force on the drum uneven and affects the stability of the drum.

[0004] The existing patent (publication number: CN211946062U) discloses a safety brake for a crane drum. If braking is required, the brake caliper is activated to clamp the brake disc and brake the drum. Since the brake disc is installed in the middle of the drum, the space required for installation can be reduced to a certain extent. At the same time, it avoids uneven force on the drum as a whole, thus effectively improving the stability of the drum.

[0005] To address the aforementioned issues, existing patents offer solutions. However, the easily worn components of the safety locking structure for the under-pressure braking of some existing crane drums are inconvenient to replace. After the brake friction pads, locking claws, springs, and pins inside the safety locking structure are worn, replacement is time-consuming and labor-intensive, affecting the crane's maintenance efficiency and consequently its normal operation. Especially in situations with tight deadlines, this can lead to a chain of losses such as project delays and increased rental costs.

[0006] To address this, a crane drum underpressure braking safety locking device is proposed. Utility Model Content

[0007] The purpose of this utility model is to provide a crane drum underpressure braking safety locking device, which can solve the problem that the easily worn parts of the existing crane drum underpressure braking safety locking structure are inconvenient to replace. After the brake friction pads, locking claws, springs and pins inside the braking safety locking structure are worn, the replacement is time-consuming and laborious, which affects the maintenance efficiency of the crane and thus affects the normal use of the crane. Especially in the actual situation of tight construction period, it may lead to a chain of losses such as project delays and increased rental costs.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a crane drum underpressure braking safety locking device, comprising a drum body and a rotating shaft, wherein locking mechanisms are provided on both sides of the drum body, and a locking mechanism is provided inside the locking mechanism; the locking mechanism includes a plurality of locking blocks, slots, magnetic strips and fixing rings, wherein the slots are opened inside the fixing rings, the locking blocks are movably inserted into the slots, the magnetic strips are embedded in the inner wall of the slots, the surface of the locking blocks is magnetically attracted to the magnetic strips, and the fixing rings are sleeved on the surface of the rotating shaft.

[0009] Preferably, the locking mechanism includes a locking ring, several slots and two brackets, the brackets being fixedly connected to the locking ring on the side closest to the locking ring, and the slots being formed on the inner wall of the locking ring.

[0010] Preferably, the bottom of the locking ring is provided with a fixing plate, and the bottom of the bracket is fixedly connected to the top of the fixing plate.

[0011] Preferably, the top of the fixing plate is provided with mounting holes, and the number of mounting holes is several and symmetrically distributed inside the fixing plate.

[0012] Preferably, the front and rear sides of the top of the fixed plate are fixedly connected to the support columns, and the top of the two support columns are fixedly connected to the support ring, and the rotating shaft is rotatably connected inside the support ring.

[0013] Preferably, the two fixed rings are fixedly connected to the limiting rings on opposite sides, and the limiting rings are internally threaded with limiting screws. The limiting screws are a number and symmetrically distributed inside the limiting rings, and the inner wall of the limiting rings is in contact with the surface of the rotating shaft.

[0014] Preferably, the rotating shaft has a limiting hole inside for use with a limiting screw, and the limiting screw extends into the limiting hole.

[0015] Preferably, the fixing ring, the retaining block, and the locking ring are all made of maraging steel.

[0016] Preferably, the surfaces of the fixing ring, the locking block, and the locking ring are all coated with an anti-oxidation layer, and the anti-oxidation layer is made of nickel-chromium-aluminum-yttrium coating.

[0017] Preferably, the surface of the antioxidant layer is coated with a wear-resistant layer, and the wear-resistant layer is made of WC composite coating.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This application sets up a locking mechanism, in which the fixing ring rotates synchronously with the rotating shaft. When the pressure is lost, the locking block is overcome by the centrifugal force and the magnetic attraction strip is overcome, so it is thrown out of the slot and locked into the slot to achieve locking. It is fixed to the rotating shaft by the limiting ring and the limiting screw. After disassembly, the locking block can be quickly pulled out and replaced. The fixing ring, locking block and locking ring made of martensitic aging steel are combined with an anti-oxidation layer and a wear-resistant layer to improve durability.

[0020] 2. This application sets up a locking mechanism, which consists of a locking ring, a slot and a bracket. The bracket is fixed to the fixed plate to ensure stable locking. The support column and the support ring support the rotating shaft and the drum body to rotate smoothly. The locking mechanism solves the problem of inconvenient replacement of vulnerable parts. Attached Figure Description

[0021] Figure 1 This is an overall structural diagram of the crane drum underpressure braking safety locking device of this utility model;

[0022] Figure 2 This is a three-dimensional connection diagram of the bracket and the fixing plate in this utility model;

[0023] Figure 3 This is a three-dimensional connection diagram of the fixing ring and the limiting ring in this utility model;

[0024] Figure 4 This is a cross-sectional view of the fixing ring in this utility model;

[0025] Figure 5 This is a three-dimensional connection diagram of the locking mechanism in this utility model;

[0026] Figure 6 This is a three-dimensional connection diagram of the support ring and the support column in this utility model;

[0027] Figure 7 This is a three-dimensional structural diagram of the rotating shaft of this utility model;

[0028] Figure 8 This is a cross-sectional view of the card block in this utility model.

[0029] In the diagram, 1. Roller body; 2. Shaft; 3. Locking mechanism; 301. Locking ring; 302. Slot; 303. Bracket; 4. Fixing plate; 5. Support column; 6. Engaging mechanism; 601. Locking block; 602. Slot; 603. Magnetic strip; 604. Fixing ring; 7. Limiting ring; 8. Mounting hole; 9. Limiting screw; 10. Support ring; 11. Limiting hole; 12. Anti-oxidation layer; 13. Wear-resistant layer. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-8 The present invention provides the following technical solution:

[0032] A crane drum underpressure braking safety locking device includes a drum body 1 and a rotating shaft 2. Locking mechanisms 3 are provided on both sides of the drum body 1. The locking mechanisms 3 are provided with a locking mechanism 6 inside. The locking mechanism 6 includes a plurality of locking blocks 601, slots 602, magnetic strips 603 and fixing rings 604. The slots 602 are opened inside the fixing rings 604. The locking blocks 601 are movably inserted into the slots 602. The magnetic strips 603 are embedded in the inner wall of the slots 602. The surface of the locking blocks 601 is magnetically attracted to the magnetic strips 603. The fixing rings 604 are sleeved on the surface of the rotating shaft 2.

[0033] In this embodiment: the device is fixed by external bolts passing through the mounting holes 8 of the fixing plate 4. When the hydraulic system of the crane loses pressure or power is interrupted, the drum body 1 and the rotating shaft 2 rotate rapidly due to the weight of the load. The fixing ring 604 rotates synchronously at high speed with the rotating shaft 2. The internal locking block 601 is thrown out of the slot 602 by centrifugal force, overcomes the magnetic attraction of the magnetic strip 603, and locks into the slot 302 of the locking ring 301, forming a mechanical lock and achieving braking. When replacing the locking block 601, the limiting screw 9 of the limiting ring 7 is removed to make it exit the limiting hole 11 of the rotating shaft 2. The fixing ring 604 can then be pulled out from inside the locking ring 301, and the locking block 601 can be removed for replacement. The support column 5 and the support ring 10 stably support the rotating shaft. Shaft 2 facilitates the rotation of the drum body 1 and the rotating shaft 2. The fixing ring 604, the locking block 601, and the locking ring 301 are made of martensitic aging steel with a nickel-chromium-aluminum-yttrium anti-oxidation layer 12 and a WC composite wear-resistant layer 13 on the surface. They are resistant to impact friction and oxidation corrosion, ensuring long-term reliability. This solves the problem that the easily worn parts of the safety locking structure of the drum of some existing cranes are inconvenient to replace. After the brake friction pads, locking claws, springs, and pins inside the safety locking structure are worn, the replacement is time-consuming and laborious, which affects the maintenance efficiency of the crane and thus affects the normal use of the crane. Especially in the case of tight construction schedules, it may lead to a chain of losses such as project delays and increased rental costs.

[0034] Specifically, such as Figure 5As shown, the locking mechanism 3 includes a locking ring 301, several slots 302 and two brackets 303. The brackets 303 are fixedly connected to the locking ring 301 on the side near the locking ring 301, and the slots 302 are formed on the inner wall of the locking ring 301.

[0035] Specifically, such as Figure 2 As shown, a fixing plate 4 is provided at the bottom of the locking ring 301, and the bottom of the bracket 303 is fixedly connected to the top of the fixing plate 4.

[0036] Specifically, such as Figure 2 As shown, the top of the fixing plate 4 is provided with mounting holes 8, and there are several mounting holes 8 symmetrically distributed inside the fixing plate 4.

[0037] Specifically, such as Figure 1 and Figure 6 As shown, support columns 5 are fixedly connected to the front and rear sides of the top of the fixed plate 4, and a support ring 10 is fixedly connected between the tops of the two support columns 5. The rotating shaft 2 is rotatably connected inside the support ring 10.

[0038] In this embodiment: the locking mechanism 3 is fixed to the fixing plate 4 by the bracket 303 to improve the locking stability; the mounting hole 8 of the fixing plate 4 facilitates the fixing of the device; the support column 5 and the support ring 10 provide stable support for the rotating shaft 2, ensuring smooth rotation; the overall structure is compact and firmly installed, enhancing the reliability of the device.

[0039] Specifically, such as Figure 1 and Figure 3 As shown, the two fixed rings 604 are fixedly connected to the limit rings 7 on opposite sides. The limit rings 7 are connected to the internal threads of the limit screws 9. There are several limit screws 9 and they are symmetrically distributed inside the limit rings 7. The inner wall of the limit rings 7 is in contact with the surface of the rotating shaft 2.

[0040] Specifically, such as Figure 3 and Figure 7 As shown, the inside of the rotating shaft 2 is provided with a limiting hole 11 that is used in conjunction with the limiting screw 9, and the limiting screw 9 extends into the inside of the limiting hole 11.

[0041] In this embodiment: the limiting ring 7, together with the limiting screw 9 and the limiting hole 11 of the rotating shaft 2, realizes a stable connection between the fixing ring 604 and the rotating shaft 2, preventing relative slippage; the fixing ring 604 and the rotating shaft 2 can be separated by removing the limiting screw 9, which provides convenience for the replacement of vulnerable parts and reduces maintenance time.

[0042] Specifically, such as Figure 4 and Figure 5 As shown, the fixing ring 604, the locking block 601, and the locking ring 301 are all made of maraging steel.

[0043] Specifically, such as Figure 8 As shown, the surfaces of the fixing ring 604, the locking block 601 and the locking ring 301 are all coated with an anti-oxidation layer 12, which is made of nickel-chromium-aluminum-yttrium coating.

[0044] Specifically, such as Figure 8 As shown, the surface of the anti-oxidation layer 12 is coated with a wear-resistant layer 13, which is made of WC composite coating.

[0045] In this embodiment: the martensitic aging steel material ensures the high strength and toughness of the fixing ring 604, the locking block 601 and the locking ring 301, and withstands braking impact; the nickel-chromium-aluminum-yttrium anti-oxidation layer 12 resists oxidation corrosion; and the WC composite wear-resistant layer 13 reduces wear, ensuring the long-term stable operation of the fixing ring 604, the locking block 601 and the locking ring 301.

[0046] Working principle: Using the mounting holes 8 on the top of the fixing plate 4, external bolts can be passed through the mounting holes 8 to fix the device in the installation position. When the crane's hydraulic system loses pressure or power is interrupted, the drum body 1 and the rotating shaft 2 will rotate rapidly due to the weight of the load. At this time, the fixing ring 604 rotates synchronously at high speed with the rotating shaft 2. The internal locking block 601 is thrown out of the slot 602 under centrifugal force. The locking block 601 overcomes the magnetic attraction of the magnetic strip 603 and moves outward, eventually locking into the groove 302 inside the locking ring 301. Due to the tight contact between the locking block 601 and the groove 302, a mechanical lock is formed. At this time, the locking block 601 can no longer be attracted back into the slot 602 by the magnetic strip 603. 2. This achieves braking and locking of the drum body 1 and the rotating shaft 2. The locking mechanism 3 is fixed to the fixed plate 4 by two brackets 303 to ensure the stability of the locking process. When the locking block 601 needs to be replaced, first remove the limiting screw 9 inside the limiting ring 7. The limiting screw 9 is removed from the limiting hole 11 of the rotating shaft 2. At this time, the fixed ring 604 can be pulled out from inside the locking ring 301, and then the easily worn locking block 601 can be pulled out from the slot 602 for replacement. At the same time, the pillars 5 on the front and rear sides of the top of the fixed plate 4 and the top support ring 10 provide stable support for the rotating shaft 2, ensuring that the drum body 1 and the rotating shaft 2 can rotate stably. 4. The locking block 601 and the locking ring 301 are made of martensitic aging steel, which has high strength and good toughness, and can withstand the impact and friction during braking. The surfaces of the fixing ring 604, locking block 601, and locking ring 301 are first sprayed with a nickel-chromium-aluminum-yttrium coating as an anti-oxidation layer 12, which can effectively resist oxidation and corrosion during braking and daily use, and extend the service life of the components. The surface of the anti-oxidation layer 12 is then sprayed with a WC composite coating as a wear-resistant layer 13, which further improves the wear resistance of the fixing ring 604, locking block 601, and locking ring 301, reduces the wear of the locking block 601 when it engages with the slot 302 and during relative movement, and ensures the stability of the fixing ring 604, locking block 601, and locking ring. The 301 design ensures long-term reliable operation and solves the problem of inconvenient replacement of easily worn parts in the safety locking structure of some existing crane drums under pressure braking systems. Replacement of worn brake friction pads, locking claws, springs, and pins within the safety locking structure is time-consuming and labor-intensive, affecting crane maintenance efficiency and consequently impacting normal crane operation. This can lead to a chain reaction of losses, especially in tight project schedules, potentially causing project delays and increased rental costs. It should be noted that the drum body 1 is a well-established and publicly available technology, and any content not described in detail in this specification is prior art known to those skilled in the art and will not be elaborated upon here.

[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A crane drum pressure loss brake safety locking device, comprising a drum body (1) and a rotating shaft (2), characterized in that: Locking mechanisms (3) are provided on both sides of the roll body (1), and locking mechanisms (6) are provided inside the locking mechanisms (3); the locking mechanisms (6) include several locking blocks (601), slots (602), magnetic strips (603) and fixing rings (604). The slots (602) are opened inside the fixing rings (604), the locking blocks (601) are movably inserted into the slots (602), the magnetic strips (603) are embedded in the inner wall of the slots (602), the surface of the locking blocks (601) is magnetically attracted to the magnetic strips (603), and the fixing rings (604) are sleeved on the surface of the rotating shaft (2).

2. A safety locking device for a crane drum in case of pressure loss according to claim 1, characterized in that The locking mechanism (3) includes a locking ring (301), several slots (302) and two brackets (303). The brackets (303) are fixedly connected to the locking ring (301) on the side near the locking ring (301), and the slots (302) are formed on the inner wall of the locking ring (301).

3. A safety locking device for a crane drum in case of loss of pressure according to claim 2, characterized in that: The bottom of the locking ring (301) is provided with a fixing plate (4), and the bottom of the bracket (303) is fixedly connected to the top of the fixing plate (4).

4. A safety locking device for a crane drum in case of loss of pressure according to claim 3, characterized in that: The top of the fixing plate (4) is provided with mounting holes (8), and there are several mounting holes (8) symmetrically distributed inside the fixing plate (4).

5. The safety locking device for the pressure loss braking of a crane drum according to claim 3, characterized in that: The front and rear sides of the top of the fixed plate (4) are fixedly connected to the support column (5), and the top of the two support columns (5) are fixedly connected to the support ring (10). The rotating shaft (2) is rotatably connected inside the support ring (10).

6. The safety locking device for the crane drum pressure loss braking according to claim 1, characterized in that: The two fixed rings (604) are fixedly connected to the limit ring (7) on opposite sides. The limit ring (7) is connected to the internal thread of the limit screw (9). The limit screw (9) is a number and is symmetrically distributed inside the limit ring (7). The inner wall of the limit ring (7) is in contact with the surface of the rotating shaft (2).

7. A safety locking device for a crane drum in case of loss of pressure according to claim 6, characterized in that: The rotating shaft (2) has a limiting hole (11) inside which it is used in conjunction with the limiting screw (9), and the limiting screw (9) extends into the limiting hole (11).

8. The safety locking device for the pressure loss braking of a crane drum according to claim 2, characterized in that: The fixing ring (604), the locking block (601), and the locking ring (301) are all made of maraging steel.

9. A crane drum underpressure braking safety locking device according to claim 2, characterized in that: The surfaces of the fixing ring (604), the locking block (601) and the locking ring (301) are all coated with an anti-oxidation layer (12), which is made of nickel-chromium-aluminum-yttrium coating.

10. A crane drum underpressure braking safety locking device according to claim 9, characterized in that: The surface of the antioxidant layer (12) is coated with a wear-resistant layer (13), and the wear-resistant layer (13) is made of WC composite coating.

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