Lifting cylinder with double-brake function

Abstract

The utility model discloses a hoisting cylinder with a double-brake function, which comprises support beams I which are symmetrically arranged, a support beam II and a support beam III which are symmetrically and fixedly arranged between the two support beams I, support seats arranged on the upper surface of the support beam II, a roll shaft rotationally arranged between the two support seats, and side covers symmetrically and fixedly arranged on the surface of the roll shaft, a rope outlet winding drum is fixedly arranged between the two side covers, a support is fixedly installed on the upper surface of the third supporting beam, and double-brake mechanisms used for braking the roller shafts are symmetrically arranged between the support and the third supporting beam. The roller shaft is subjected to primary braking through the braking plate and the braking ring, and then the roller shaft is subjected to secondary braking through meshing of the ratchet and the ratchet wheel, so that the safety of workers during follow-up maintenance or dismounting and hoisting of heavy objects can be greatly improved, excessive damage to the ratchet cannot be caused, and the use state of the follow-up ratchet is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of crane component technology, and in particular to a crane cylinder with dual braking function. Background Technology

[0002] A crane is a multi-action lifting machine used for vertically lifting and horizontally moving heavy objects, widely used in construction, logistics, ports, and other industries. The crane drum is a crucial load-bearing component of the crane, enabling the lifting or movement of heavy objects. The drum design directly affects the crane's load-bearing capacity, safety, and service life. Drums are widely used in tower cranes, crawler cranes, and bridge cranes, providing storage, release, support, and protection for wire ropes. When the drum's drive motor malfunctions and loses control, the lifted load will cause the drum to rotate, potentially resulting in the load impacting the ground and posing a hazard to both the drum and workers.

[0003] A search revealed that utility model patent document CN212151439U discloses a crane drum, including a bracket, a drum body rotatably connected to the bracket, and drum edges fixedly connected to both ends of the drum body. Several gear teeth are arranged radially around the axis of the drum edge on the outer peripheral wall of the drum edge, with locking grooves formed between adjacent gear teeth. Mounting frames are provided on both sides of the bracket along the vertical direction. A fixing block for vertical movement of the mounting frame is slidably connected to the side of the mounting frame facing the drum body. A stop block for insertion into the locking groove is fixedly connected to the end of the fixing block away from the mounting frame. A drive mechanism for driving the fixing block to slide on the mounting frame is provided. The advantages of this utility model are: when the drum brakes abnormally, the drive mechanism is activated, and the fixing block moves downwards, thereby locking the stop block into the locking groove on the outer peripheral wall of the drum edge. The stop block limits the movement of the drum edge, preventing it from rotating immediately, thus locking the drum body in place with a good locking effect.

[0004] When the crane drum is braked and locked, a stop block is used to engage with the locking groove on the drum. However, when the drum brakes abnormally, the drum will rotate rapidly. At this time, it is difficult for the stop block to enter the locking groove. If it is forced to enter, it will cause great damage to the stop block. Utility Model Content

[0005] The purpose of this invention is to provide a lifting cylinder with dual braking function, which uses a dual braking mechanism to brake and lock the roller shaft and the rope drum, thereby effectively improving the braking effect.

[0006] The present invention adopts the following technical solution:

[0007] A lifting cylinder with dual braking function includes symmetrically arranged support beams 1, support beams 2 and 3 symmetrically fixed between the two support beams 1, support seats are installed on the upper surface of support beams 2, rollers are rotatably arranged between the two support seats, side covers are symmetrically fixed on the surface of the rollers, a rope drum is fixed between the two side covers, a bracket is fixedly installed on the upper surface of support beams 3, and a dual braking mechanism for braking the rollers is symmetrically arranged between the bracket and support beams 3.

[0008] Optionally, the dual braking mechanism includes an electric push rod, a ratchet, and symmetrically arranged brake rings. The fixed end of the upper electric push rod is fixedly installed on the upper lower surface of the bracket, and the fixed end of the lower electric push rod is fixedly installed on the upper surface of the support beam three by bolts.

[0009] Optionally, the ratchet is fixedly mounted on the circumferential surface of the roller shaft, and two brake rings are respectively mounted on both sides of the ratchet and fixed to the roller shaft.

[0010] Optionally, a support plate is fixedly installed at the outer end of the piston rod of the electric push rod, and a brake plate is symmetrically arranged on the support plate relative to the outer side of the brake ring, with the position of the brake plate corresponding to the position of the brake ring.

[0011] Optionally, the surface of the brake plate relative to the brake ring is set as an arc surface, and the diameter of the arc surface of the brake plate is adapted to the diameter of the brake ring.

[0012] Optionally, the brake plate has several guide shafts linearly arranged relative to the outer surface of the support plate and fixed to the brake plate. The guide shafts pass through the support plate and are slidably engaged. A plug is provided on the outer end face of the guide shaft.

[0013] Optionally, a number of brake springs, which are sleeved on the circumference of the guide shaft, are fixedly connected between the support plate and the brake plate.

[0014] Optionally, an arc-shaped brake strip is fixedly installed on the arc surface of the brake plate, and the cross section of the arc-shaped brake strip is trapezoidal.

[0015] Optionally, an annular brake groove is formed on the circumferential surface of the brake ring. The cross-section of the annular brake groove is trapezoidal, which is adapted to the arc-shaped brake strip.

[0016] Optionally, a base is provided between the two brake plates, the base is fixed to the support plate, a connecting plate is fixedly provided on the outer surface of the base, and ratchet teeth that mesh with the ratchet are fixedly provided on the outer surface of the connecting plate.

[0017] In summary, this utility model has the following beneficial effects:

[0018] 1. In this utility model, when the motor driving the roller shaft to rotate malfunctions, the load lifted by the rope drum tends to move downwards. The descent of the load will cause the rope drum to rotate, and the motor loses control over the roller shaft. At this time, the electric push rod is activated, which drives the brake plate to approach the brake ring. At this time, the brake ring is rotating, and the arc-shaped brake strip will gradually contact the annular brake groove. Through friction, the brake ring is forced to slow down its rotation. With the drive of the electric push rod, the brake ring stops moving.

[0019] 2. In this utility model, the cross-sections of the arc-shaped brake bar and the annular brake groove are both trapezoidal, which can effectively increase the contact area, improve the friction effect, shorten the braking time, and prevent the lifted heavy objects from hitting the ground.

[0020] 3. In this utility model, the roller shaft is braked once by the brake plate and brake ring, and then the roller shaft is braked a second time by the meshing of the ratchet and ratchet wheel. This can greatly improve the safety of workers when they are repairing or disassembling and lifting heavy objects, and will not cause too much damage to the ratchet, thus ensuring the ratchet's condition for subsequent use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the rope delivery drum of this utility model;

[0023] Figure 3 This is a schematic diagram of the dual braking mechanism of this utility model. Figure 1 ;

[0024] Figure 4 This is a schematic diagram of the dual braking mechanism of this utility model. Figure 2 ;

[0025] Figure 5 This is a schematic diagram of the dual braking mechanism of this utility model. Figure 3 ;

[0026] Figure 6 This is a cross-sectional view of the dual braking mechanism of this utility model;

[0027] Figure 7 In this utility model Figure 6 A magnified view of the details at point A.

[0028] In the diagram, 1. Support beam one; 11. Support beam two; 12. Support beam three; 13. Brake; 2. Support seat; 3. Rope reel drum; 31. Side cover; 4. Double braking mechanism; 41. Electric push rod; 42. Support plate; 43. Brake plate; 431. Arc-shaped brake bar; 44. Ratchet; 45. Brake ring; 451. Annular brake groove; 46. Brake spring; 47. Guide shaft; 48. Base; 49. Connecting plate; 491. Ratchet; 51. Roller shaft. Detailed Implementation

[0029] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0030] Please see Figure 1-7 The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0031] like Figure 1-2 As shown, a lifting cylinder with dual braking function includes symmetrically arranged support beams 1, and support beams 11 and 12 are symmetrically fixed between the two support beams 1.

[0032] Support seats 2 are bolted to the upper surface of support beam 21. A roller 51 is rotatably mounted between the two support seats 2. Side covers 31 are symmetrically fixed to the surface of the roller 51. A rope drum 3 is fixed between the two side covers 31. The rotation of the roller 51 drives the side covers 31 to move, which in turn drives the rope drum 3 to rotate.

[0033] A bracket 13 is fixedly installed on the upper surface of the support beam 3 12 by bolts. A double braking mechanism 4 for braking the roller shaft 51 is symmetrically arranged between the bracket 13 and the support beam 3 12.

[0034] like Figure 1-2 As shown, in this utility model, a bearing is installed inside the support base 2, the outer ring of the bearing is fixed to the support base 2, and the inner ring of the bearing is fixed to the roller shaft 51.

[0035] like Figure 3-4 As shown, in this utility model, the dual braking mechanism 4 includes an electric push rod 41, a ratchet 44, and symmetrically arranged brake rings 45.

[0036] The fixed end of the upper electric actuator 41 is fixedly installed on the upper lower surface of the bracket 13 by bolts, and the fixed end of the lower electric actuator 41 is fixedly installed on the upper surface of the support beam 12 by bolts. The two electric actuators 41 are positioned correspondingly and are located on the same vertical plane.

[0037] The ratchet 44 is fixedly mounted on the circumferential surface of the roller 51, and two brake rings 45 are respectively mounted on both sides of the ratchet 44 and fixed to the roller 51.

[0038] like Figure 3-4 As shown, in this utility model, a support plate 42 is fixedly provided at the outer end of the piston rod of the electric push rod 41. A brake plate 43 is symmetrically provided on the outer side of the support plate 42 relative to the brake ring 45. The position of the brake plate 43 corresponds to the position of the brake ring 45. The surface of the brake plate 43 relative to the brake ring 45 is set as an arc surface, and the diameter of the arc surface of the brake plate 43 is adapted to the diameter of the brake ring 45.

[0039] The brake plate 43 has several guide shafts 47 linearly arranged relative to the outer surface of the support plate 42. The guide shafts 47 are fixed to the brake plate 43, pass through the support plate 42 and are slidably engaged, and the outer end face of the guide shaft 47 is provided with a plug to prevent the guide shaft 47 from detaching from the support plate 42.

[0040] Several brake springs 46, which are sleeved on the circumference of the guide shaft 47, are fixedly connected between the support plate 42 and the brake plate 43.

[0041] like Figure 4 and Figure 7 As shown, in this utility model, an arc-shaped brake strip 431 is fixedly provided on the arc surface of the brake plate 43. The cross-section of the arc-shaped brake strip 431 is trapezoidal. An annular brake groove 451 is provided on the circumferential surface of the brake ring 45. The cross-section of the annular brake groove 451 is trapezoidal and is adapted to the arc-shaped brake strip 431.

[0042] Specifically, when the motor driving the roller shaft 51 malfunctions, the load lifted by the rope drum 3 tends to move downwards. The descent of the load will cause the rope drum 3 to rotate, and the motor will lose control of the roller shaft 51. At this time, the electric push rod 41 is activated, which drives the brake plate 43 to approach the brake ring 45. At this time, the brake ring 45 is rotating, and the arc-shaped brake strip 431 will gradually come into contact with the annular brake groove 451. Through friction, the brake ring 45 is forced to slow down its rotation. With the drive of the electric push rod 41, the brake ring 45 stops moving. At this time, the brake spring 46 generates compression, so that the arc-shaped brake strip 431 fits tightly against the annular brake groove 451.

[0043] Furthermore, the cross-sections of the arc-shaped brake strip 431 and the annular brake groove 451 are both trapezoidal, which can effectively increase the contact area, improve the friction effect, shorten the braking time, and prevent the lifted heavy objects from hitting the ground.

[0044] like Figure 5 As shown, in this embodiment, a base 48 is provided between the two brake plates 43. The base 48 is fixed to the support plate 42 by bolts. A connecting plate 49 is fixedly provided on the outer surface of the base 48 by bolts. A ratchet tooth 491 that meshes with the ratchet 44 is fixedly provided on the outer surface of the connecting plate 49.

[0045] Specifically, after the roller shaft 51 stops rotating by the brake plate 43, the ratchet 491 is not engaged with the ratchet 44, and the brake spring 46 can still be compressed. Then, the electric push rod 41 continues to push the support plate 42 towards the roller shaft 51, so that the ratchet 491 engages with the ratchet 44. After the ratchet 44 engages with the ratchet 491, the roller shaft 51 cannot rotate. At this time, the lifted heavy object can be disassembled or the motor can be repaired.

[0046] Furthermore, the roller shaft 51 is braked once by the brake plate 43 and the brake ring 45, and then the roller shaft 51 is braked a second time by the meshing of the ratchet 491 and the ratchet 44. This can greatly improve the safety of the staff when they are doing maintenance or disassembling and lifting heavy objects, and will not cause too much damage to the ratchet 491, thus ensuring the subsequent use of the ratchet 491.

[0047] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0048] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0049] The foregoing description illustrates and describes several preferred embodiments of this application. However, as previously stated, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A lifting drum having a dual braking function, characterized in that: It includes a symmetrically arranged support beam 1, a support beam 2 and a support beam 3 symmetrically fixed between the two support beam 1s, a support seat installed on the upper surface of the support beam 2, a roller shaft rotatably arranged between the two support seats, side covers symmetrically fixed on the surface of the roller shaft, a rope delivery drum fixed between the two side covers, a bracket fixedly installed on the upper surface of the support beam 3, and a double braking mechanism for braking the roller shaft symmetrically arranged between the bracket and the support beam 3.

2. A lifting drum having dual braking function according to claim 1, characterized in that: The dual braking mechanism includes an electric push rod, a ratchet, and symmetrically arranged brake rings. The fixed end of the upper electric push rod is fixedly installed on the upper lower surface of the bracket, and the fixed end of the lower electric push rod is fixedly installed on the upper surface of the support beam three by bolts.

3. A lifting drum having dual braking function according to claim 2, characterized in that: The ratchet is fixedly mounted on the circumference of the roller shaft, and two brake rings are respectively mounted on both sides of the ratchet and fixed to the roller shaft.

4. The dual braking function hoisting drum of claim 2, wherein: A support plate is fixedly installed at the outer end of the piston rod of the electric push rod. A brake plate is symmetrically arranged on the support plate relative to the outer side of the brake ring, and the position of the brake plate corresponds to the position of the brake ring.

5. A lifting column having dual braking functionality according to claim 4, characterised in that: The surface of the brake plate relative to the brake ring is set as an arc surface, and the diameter of the arc surface of the brake plate is matched with the diameter of the brake ring.

6. A lifting column having dual braking capability according to claim 4 wherein: The brake plate has several guide shafts linearly arranged relative to the outer surface of the support plate, which are fixed to the brake plate. The guide shafts pass through the support plate and slide together. The outer end face of the guide shaft is provided with a plug.

7. A lifting column having dual braking functionality according to claim 6, characterised in that: Several brake springs, sleeved on the circumference of the guide shaft, are fixedly connected between the support plate and the brake plate.

8. The dual braking function hoisting drum of claim 4, wherein: An arc-shaped brake strip is fixedly installed on the arc surface of the brake plate, and the cross section of the arc-shaped brake strip is trapezoidal.

9. A lifting column having dual braking functionality according to claim 8, characterised in that: The brake ring has an annular brake groove on its circumference. The cross-section of the annular brake groove is trapezoidal, which is compatible with the arc-shaped brake strip.

10. The dual braking function hoisting drum of claim 4, wherein: A base is provided between the two brake plates. The base is fixed to the support plate. A connecting plate is fixedly provided on the outer surface of the base. A ratchet tooth that meshes with the ratchet is fixedly provided on the outer surface of the connecting plate.

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