Brake for revolving platform of crane

Abstract

The invention provides a crane revolving platform brake, and relates to the technical field of brakes, the crane revolving platform brake comprises a shell, the shell is mounted on the outer side of a crane case, the bottom of the case is rotatably mounted above a revolving platform, and a driving motor for rotary driving is fixedly mounted at the upper end of the shell through a fixing seat; a transmission shaft is rotationally installed in the shell, a driving gear used for being meshed with a rotary table gear is fixedly installed at the lower end of the transmission shaft, and a braking assembly used for braking the transmission shaft is installed on one side of the shell; liquid is discharged through a hydraulic groove and enters an annular groove, so that a plurality of locking clamping seats are ejected outwards to be matched and locked with locking clamping grooves, secondary movement of the transmission shaft in the follow-up stopping process is avoided, and after the crane stops rotating, the locking clamping seats can be locked in a matched mode. And angle locking is carried out on the lifting wall, so that passive rotation caused by external interference on the lifting wall is avoided, and the safety of the crane in the using process can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of brakes, and in particular to a crane slewing platform brake. Background Art

[0002] Cranes require a slewing platform to freely adjust their rotation angle during use. To improve safety, a brake is required to slowly stop the crane during rotation. Patent publication number CN216306555U describes a brake specifically for an external brake for an excavator slewing reducer. The brake comprises a brake housing, a brake piston, a cylindrical helical compression spring, a friction plate, a friction lining, a connecting shaft, a hexagon socket screw, a flange, and a pin. The brake housing is connected to the reducer assembly and serves as the brake base. The flange is connected to the brake housing via a pin and hexagon socket screw, and the slewing motor is mounted on the flange. One end of the connecting shaft is connected to the slewing motor output shaft and the other end is connected to the slewing reducer sun gear. The friction plate is connected to the brake housing, and the friction lining is connected to the connecting shaft. A cylindrical helical compression spring is positioned between the brake piston and the flange. This design allows for the connection of a slewing motor without a built-in brake to a slewing reducer, expanding the range of slewing motors available for the slewing reducer assembly. The brake boasts a compact structure and small size, high braking reliability, strong scalability, and low maintenance and manufacturing costs.

[0003] The existing brake can slow down and brake the rotating structure during use. However, after the braking is completed, because the crane has a large structure and is generally used for outdoor operations, after the existing brake completes the braking of the slewing platform, it will be disturbed by outdoor factors such as strong wind environment. If the lifting arm on the crane is at a high place, it will push the lifting arm, and then cause rotation between the slewing platform and the lifting arm, causing a safety hazard. For this reason, the present application designs a crane slewing platform brake that can lock the current rotation angle after braking is completed to prevent the lifting arm from moving after stopping rotation. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a crane slewing platform brake, which solves the problem that after the existing brake completes the deceleration braking, the lifting arm will be pushed by strong winds to cause rotation and cause safety hazards.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A crane slewing platform brake comprises a shell, which is mounted on the outside of a crane chassis, the bottom of the chassis is rotatably mounted above the slewing platform, a driving motor for rotational drive is fixedly mounted on the upper end of the shell through a fixing seat, a transmission shaft is rotatably mounted inside the shell, a driving gear for engaging with the slewing platform gear is fixedly mounted on the lower end of the transmission shaft, a braking assembly for braking the transmission shaft is mounted on one side of the shell, a locking assembly for locking the transmission shaft is provided on the lower side of the shell, a limiting ring is provided on the bottom of the shell, and the limiting ring is located on the shaft body of the transmission shaft.

[0006] Preferably, a rotating cavity is opened inside the shell, and a first rotating disk and a second rotating disk are rotatably installed in the middle of the rotating cavity. The surfaces of the first rotating disk and the second rotating disk are respectively provided with a plurality of docking holes and docking shafts, and the docking holes and docking shafts are interlaced and docked.

[0007] Preferably, the upper end of the first rotating disk is connected to the output end of the driving motor, the lower end of the second rotating disk is connected to the transmission shaft, a bearing is provided on the lower side of the rotating cavity, and the transmission shaft body is located inside the bearing.

[0008] Preferably, a gear ring is fixedly mounted on the inner wall of the lower side of the rotating cavity, a stabilizing gear column is provided on the transmission shaft body, and a plurality of planetary gears are provided between the stabilizing gear column and the gear ring, and the plurality of planetary gears are all located on the lower side of the rotating cavity.

[0009] Preferably, the brake assembly includes a limit plate, which is fixedly mounted on the upper side of the rotating cavity, a plurality of brake springs are provided at the lower end of the limit plate, and a brake disc is provided at the lower end of the brake spring; An annular cover is fixedly installed on the upper side of the rotating cavity and below the limit plate, a connecting frame is installed on the outer side of the brake disc, a hydraulic groove is opened inside the annular cover, and a plurality of sealing pistons are movably provided in the hydraulic groove. The upper ends of the plurality of sealing pistons are fixedly connected to the connecting frame, and the lower ends of the plurality of sealing pistons are commonly provided with a sealing plate.

[0010] Preferably, an expansion seat is fixedly installed on the outside of the shell, and a first channel and a second channel are opened at the bottom of the expansion seat. A liquid inlet channel is opened on the upper side of the first channel, and the liquid inlet channel is connected in series with the hydraulic tank. The lower ends of the first channel and the second channel are both equipped with connecting pipe seats.

[0011] Preferably, a support spring is installed on the inner wall of the first channel, a limit lever is movably installed inside the first channel, one end of the limit lever is fixedly connected to the support spring, and an interactive groove is provided on the rod body of the limit lever.

[0012] Preferably, the locking assembly includes an annular groove, which is provided inside the limiting ring, and a plurality of supports are fixedly installed inside the annular groove, and a connecting rod is movably provided inside each of the supports, and a pressure plate and a locking card seat are respectively installed at both ends of the connecting rod, and a plurality of locking card slots are provided on the shaft body of the transmission shaft, and the locking card slots are locked with the locking card seat; A limiting sleeve is provided on the inner wall of the support, and a return spring is installed between the limiting sleeve and the corresponding connecting rod.

[0013] Preferably, a first flow channel is opened on one side of the annular groove, a second flow channel is opened on one side of the liquid inlet channel, a series pipe is installed between the first flow channel and the second flow channel, and a one-way solenoid valve is fixedly installed on the outside of the first flow channel.

[0014] Preferably, a seating groove is provided on one side of the expansion seat, a push rod is installed inside the seating groove, a penetrating rod is fixedly installed on the push rod output shaft, the second flow channel passes through one side of the liquid inlet channel, the penetrating rod is movably arranged inside the second flow channel, a through hole is provided on the upper side of the penetrating rod body, and a guide hole is provided on the lower side of the penetrating rod body.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The first rotating disk can be driven to rotate by starting the driving motor, and its power can be transmitted to the second rotating disk by using a plurality of docking holes and docking shafts. The above structure can make the present application avoid interference with the internal structure by using the docking holes and docking shafts during braking. When the second rotating disk rotates, it can drive the transmission shaft to rotate inside the bearing. The engagement between a plurality of planetary gears and the stabilizing gear column and the gear ring can improve the rotation performance of the transmission shaft and make the driving gear more stable during rotation. The rotation of the driving gear can cooperate with the free rotation of the chassis with the upper gear disk of the turntable.

[0016] 2. During use, each connecting pipe seat is connected to the corresponding pipeline to facilitate the control of the crane. Liquid is introduced through the first channel to push the limit lever to move to one side, so that during the contraction of the support spring, the interactive groove allows the second channel and the liquid inlet channel to communicate with each other, so that liquid can be added to the second channel. The above structure can ensure that the liquid inside the hydraulic tank will not flow back due to the brake spring after the subsequent liquid addition is completed, thereby preventing the application from suddenly braking due to backflow during the rotation of the transmission shaft, thereby improving the stability of the application during operation. Similarly, as the liquid is discharged, the brake disc will contact the first rotating disc under the pressure of the brake spring, thereby realizing active braking operation, avoiding the problem that the transmission shaft will continue to rotate after the subsequent drive motor is turned off, and improving the accuracy of the crane rotation; When liquid is added to the hydraulic tank, as the liquid increases, the sealing piston will move upward under the pressure of the liquid. During this process, the liquid is continuously input through the external pressure pump, so that the liquid pressure is greater than the pressure of the brake spring, thereby separating the brake disc from the first rotating disc, and then cooperating with the drive motor to realize the rotation of the lower transmission shaft to facilitate subsequent angle rotation. When the liquid is discharged from the hydraulic tank, there is no external pressure at this time, and the liquid is quickly discharged outward through the pressure of the brake spring itself. At the same time, the sealing piston will reset downward and make the brake disc contact the first rotating disc downward and brake, thereby realizing rapid braking operation.

[0017] 3. The liquid discharged through the hydraulic groove enters the annular groove, and the liquid pressure is used to pressurize the pressure plate to push the connecting rod, thereby causing several locking seats to be ejected outward. Since the rotation speed of the transmission shaft will decrease when the liquid is discharged, the locking seat can be ejected outward to cooperate with the several locking slots on the transmission shaft body to perform a locking operation, thereby avoiding secondary movement of the transmission shaft during the subsequent stopping process. Through the above structure, the present application can lock the angle of the crane after it stops rotating to avoid the situation where the lifting wall is passively rotated due to external interference, thereby improving the safety of the crane during use.

[0018] 4. By starting the push rod to adjust the position of the penetrating rod in the second flow channel and the liquid inlet channel, the guide hole is connected to one end of the liquid inlet channel. The guide hole is in an inverted L shape, so that the liquid can flow into the second flow channel, the series pipe, the first flow channel quickly and sequentially under the pressure of the brake spring, and finally into the annular groove to increase the pressure of the lower structure. Through the above structure, the present application can trigger the locking function when braking, avoiding the hollow period that causes secondary movement of the lifting arm, and when rotating again, the one-way solenoid valve can actively discharge the liquid in the annular groove to release the locking operation; In the present application, the one-way solenoid valve is connected to the liquid storage tank through a hose, so that the subsequent liquid enters the first channel and the second channel, thereby allowing the liquid to circulate, which is more suitable for being set in a crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the installation structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention from another perspective; Figure 4 It is a schematic diagram of the top structure of the present invention; Figure 5 yes Figure 4 Schematic diagram of the cross-section structure at AA in the middle; Figure 6 yes Figure 5 A schematic diagram of the structure is enlarged in the middle; Figure 7 yes Figure 5 The enlarged structural diagram at b is shown in FIG. Figure 8 It is a schematic diagram of the front structure of the present invention; Figure 9 yes Figure 8 Schematic diagram of the cross-sectional structure at the middle BB; Figure 10 yes Figure 9 The enlarged structural diagram at c in the middle; Figure 11 yes Figure 8 Schematic diagram of the cross-sectional structure at CC.

[0020] In the figure: 1. housing; 101. fixing seat; 102. rotating cavity; 103. gear ring; 104. planetary gear; 2. turntable; 3. chassis; 4. drive motor; 5. brake assembly; 501. expansion seat; 5011. first channel; 5012. second channel; 5013. liquid inlet channel; 502. limit plate; 5021. brake spring; 503. annular cover; 5031. hydraulic groove; 5032. sealing piston; 5033. connecting frame; 504. brake disc; 505. connecting pipe seat; 506. support spring; 507. limit lever; 5071. interactive groove; 6. locking assembly; 60 1. First flow channel; 6011. One-way solenoid valve; 602. Second flow channel; 603. Series pipe; 604. Mounting groove; 605. Push rod; 606. Through rod; 6061. Through hole; 6062. Guide hole; 607. Annular groove; 608. Support; 6081. Limit sleeve; 6082. Return spring; 609. Connecting rod; 6091. Pressure plate; 6092. Locking seat; 7. First rotating disk; 701. Docking hole; 8. Second rotating disk; 801. Docking shaft; 9. Transmission shaft; 901. Locking slot; 10. Bearing; 11. Stabilizing gear column; 12. Driving gear; 13. Limiting ring. DETAILED DESCRIPTION

[0021] The following will be combined with 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.

[0022] like Figures 1 to 11As shown, a crane slewing platform brake includes a shell 1, which is installed on the outside of the crane chassis 3, and the bottom of the chassis 3 is rotatably installed above the slewing table 2. The upper end of the shell 1 is fixedly installed with a drive motor 4 for rotational drive through a fixed seat 101, and a transmission shaft 9 is rotatably installed inside the shell 1. The lower end of the transmission shaft 9 is fixedly installed with a drive gear 12 for engaging with the gear of the slewing table 2. A brake assembly 5 for braking the transmission shaft 9 is installed on one side of the shell 1, and a locking assembly 6 for locking the transmission shaft 9 is provided on the lower side of the shell 1. A limit ring 13 is provided at the bottom of the shell 1 and the limit ring 13 is located on the shaft body of the transmission shaft 9.

[0023] In this embodiment, a rotating cavity 102 is formed inside the housing 1. A first rotating disk 7 and a second rotating disk 8 are rotatably mounted in the middle of the rotating cavity 102. A plurality of docking holes 701 and docking shafts 801 are provided on the surfaces of the first rotating disk 7 and the second rotating disk 8, respectively. The docking holes 701 and the docking shafts 801 are interlaced and docked. The upper end of the first rotating disk 7 is connected to the output end of the driving motor 4 , and the lower end of the second rotating disk 8 is connected to the transmission shaft 9 . A bearing 10 is provided on the lower side of the rotating cavity 102 , and the body of the transmission shaft 9 is located inside the bearing 10 .

[0024] Among them, a ring gear 103 is fixedly installed on the inner wall of the lower side of the rotating cavity 102, a stabilizing gear column 11 is provided on the shaft body of the transmission shaft 9, and several planetary gears 104 are provided between the stabilizing gear column 11 and the ring gear 103. The several planetary gears 104 are all located on the lower side of the rotating cavity 102.

[0025] By starting the driving motor 4, the first rotating disk 7 can be driven to rotate, and its power can be transmitted to the second rotating disk 8 by using a plurality of docking holes 701 and a docking shaft 801. The above structure can make the present application use the docking holes 701 and the docking shaft 801 to interlace and dock during the braking process to avoid interference with the internal structure. When the second rotating disk 8 rotates, it can drive the transmission shaft 9 to rotate inside the bearing 10. The engagement between a plurality of planetary gears 104, the stabilizing gear column 11 and the gear ring 103 can improve the rotation performance of the transmission shaft 9 and make the driving gear 12 more stable during rotation. The rotation of the driving gear 12 can cooperate with the free rotation of the chassis 3 with the gear disk on the upper side of the turntable 2.

[0026] In this embodiment, the brake assembly 5 includes a limit plate 502, which is fixedly mounted on the upper side of the rotating cavity 102. A plurality of brake springs 5021 are provided at the lower end of the limit plate 502, and a brake disc 504 is provided at the lower end of the brake spring 5021. An annular cover 503 is fixedly installed on the upper side of the rotating cavity 102 and below the limit plate 502. A connecting frame 5033 is installed on the outside of the brake disc 504. A hydraulic groove 5031 is opened inside the annular cover 503. A number of sealing pistons 5032 are movably provided in the hydraulic groove 5031. The upper ends of the sealing pistons 5032 are fixedly connected to the connecting frame 5033, and the lower ends of the sealing pistons 5032 are commonly provided with a sealing plate.

[0027] It should be noted that an expansion seat 501 is fixedly installed on the outside of the shell 1, and a first channel 5011 and a second channel 5012 are provided at the bottom of the expansion seat 501. A liquid inlet channel 5013 is provided on the upper side of the first channel 5011. The liquid inlet channel 5013 is connected in series with the hydraulic groove 5031, and a connecting pipe seat 505 is installed at the lower end of the first channel 5011 and the second channel 5012.

[0028] In the specific setting, a support spring 506 is installed on the inner wall of the first channel 5011, and a limit lever 507 is movably installed inside the first channel 5011. One end of the limit lever 507 is fixedly connected to the support spring 506, and an interactive groove 5071 is opened on the rod body of the limit lever 507.

[0029] During use, each connecting pipe seat 505 is connected to the corresponding pipeline to facilitate the control of the crane. Liquid is introduced through the first channel 5011, which can push the limit lever 507 to move to one side, so that during the contraction of the support spring 506, the interactive groove 5071 allows the second channel 5012 and the liquid inlet channel 5013 to communicate with each other, so that liquid can be added to the second channel 5012. The above structure can ensure that after the subsequent liquid addition is completed, the liquid inside the hydraulic tank 5031 will not flow back due to the brake spring 5021, thereby preventing the application from suddenly braking due to backflow during the rotation of the transmission shaft 9, thereby improving the stability of the application during operation. Similarly, as the liquid is discharged, the brake disc 504 will contact the first rotating disc 7 under the pressure of the brake spring 5021, thereby realizing active braking operation, avoiding the problem that the transmission shaft 9 will continue to rotate after the subsequent drive motor 4 is turned off, and improving the accuracy of the crane rotation; When liquid is added to the hydraulic tank 5031, as the liquid increases, the sealing piston 5032 will move upward under the pressure of the liquid. During this process, the liquid is continuously input through the external pressure pump, so that the liquid pressure is greater than the pressure of the brake spring 5021, thereby separating the brake disc 504 from the first rotating disc 7, and then cooperating with the drive motor 4 to drive the lower transmission shaft 9 to rotate for subsequent angles. When the liquid is discharged from the hydraulic tank 5031, there is no external pressure at this time, and the liquid is quickly discharged outward through the pressure of the brake spring 5021 itself. At the same time, the sealing piston 5032 will reset downward and make the brake disc 504 contact the first rotating disc 7 downward and brake, thereby realizing a rapid braking operation.

[0030] In this embodiment, the locking assembly 6 includes an annular groove 607, which is provided inside the limiting ring 13. A plurality of supports 608 are fixedly installed inside the annular groove 607. A connecting rod 609 is movably provided inside each support 608. A pressure plate 6091 and a locking seat 6092 are respectively installed at both ends of the connecting rod 609. The shaft body of the transmission shaft 9 is provided with a plurality of locking slots 901, which are locked with the locking seat 6092. A limiting sleeve 6081 is provided on the inner wall of the support 608 , and a return spring 6082 is installed between the limiting sleeve 6081 and the corresponding connecting rod 609 .

[0031] The liquid discharged through the hydraulic groove 5031 enters the annular groove 607, and the liquid pressure is used to pressurize the pressure plate 6091 to push the connecting rod 609, thereby causing several locking seats 6092 to be pushed outward. Since the rotation speed of the transmission shaft 9 will decrease when the liquid is discharged, the locking seat 6092 is pushed outward at this time to cooperate with the several locking slots 901 on the shaft body of the transmission shaft 9 to perform a locking operation, thereby avoiding subsequent secondary movement of the transmission shaft 9 during the stopping process. Through the above structure, the present application can lock the angle of the crane after it stops rotating to avoid the situation where the lifting wall is passively rotated due to external interference, thereby allowing the present application to improve the safety of the crane during use.

[0032] In this application, a first flow channel 601 is opened on one side of the annular groove 607, a second flow channel 602 is opened on one side of the liquid inlet channel 5013, a series pipe 603 is installed between the first flow channel 601 and the second flow channel 602, and a one-way solenoid valve 6011 is fixedly installed on the outside of the first flow channel 601; A seating groove 604 is provided on one side of the expansion seat 501, a push rod 605 is installed inside the seating groove 604, a through rod 606 is fixedly installed on the output shaft of the push rod 605, the second flow channel 602 passes through one side of the liquid inlet channel 5013, the through rod 606 is movably arranged inside the second flow channel 602, a through hole 6061 is provided on the upper side of the through rod 606, and a guide hole 6062 is provided on the lower side of the through rod 606.

[0033] In order to realize the discharge operation of the hydraulic groove 5031, the position of the penetrating rod 606 in the second flow channel 602 and the liquid inlet channel 5013 is adjusted by starting the push rod 605, so that the guide hole 6062 is connected to one end of the liquid inlet channel 5013. The guide hole 6062 is an inverted L shape, so that the liquid can flow into the second flow channel 602, the series pipe 603, the first flow channel 601 in sequence under the pressure of the brake spring 5021, and finally enter the annular groove 607 to increase the pressure of the lower structure. Through the above structure, the present application can cooperate to trigger the locking function when braking, avoiding the hollow period and causing secondary movement of the lifting arm, and when rotating again, the one-way solenoid valve 6011 can actively discharge the liquid in the annular groove 607 to realize the unlocking operation.

[0034] In the present application, the one-way solenoid valve 6011 is connected to the liquid storage tank through a hose, so that the subsequent liquid can enter the first channel 5011 and the second channel 5012, thereby allowing the liquid to circulate, which is more suitable for being set in a crane.

[0035] The working principle of the crane slewing platform brake: During use, liquid is first introduced through the first channel 5011, which pushes the limit lever 507 to move to one side. As the support spring 506 contracts, the interactive groove 5071 allows the second channel 5012 and the liquid inlet channel 5013 to communicate with each other, allowing liquid to be added to the second channel 5012 and enter the hydraulic groove 5031. When liquid is added to the hydraulic tank 5031, as the liquid increases, the sealing piston 5032 moves upward under the pressure of the liquid. During this process, liquid is continuously input through an external pressure pump, making the liquid pressure greater than the pressure of the brake spring 5021, thereby separating the brake disc 504 from the first rotating disc 7. The drive motor 4 then drives the lower transmission shaft 9 to rotate, thereby adjusting the angle of the crane. When braking is required, the position of the through rod 606 in the second flow channel 602 and the liquid inlet channel 5013 is adjusted by starting the push rod 605, so that the guide hole 6062 is connected to one end of the liquid inlet channel 5013. The guide hole 6062 is in an inverted L shape, so that the liquid can flow quickly into the annular groove 607 under the pressure of the brake spring 5021. At the same time, the sealing piston 5032 will reset downward and make the brake disc 504 contact the first rotating disc 7 downward and brake, thereby realizing a rapid braking operation, and making the locking seat 6092 ejected outward to cooperate with the several locking slots 901 on the shaft body of the transmission shaft 9 for locking operation.

[0036] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A crane slewing platform brake, comprising a housing (1), characterized in that: The housing (1) is mounted on the outside of the crane chassis (3), and the bottom of the chassis (3) is rotatably mounted above the turntable (2). A driving motor (4) for rotational driving is fixedly mounted on the upper end of the housing (1) through a fixing seat (101). A transmission shaft (9) is rotatably mounted inside the housing (1), and a driving gear (12) for meshing with the gear of the turntable (2) is fixedly mounted on the lower end of the transmission shaft (9). A braking assembly (5) for braking the transmission shaft (9) is mounted on one side of the housing (1), and a locking assembly (6) for locking the transmission shaft (9) is provided on the lower side of the housing (1). A limiting ring (13) is provided on the bottom of the housing (1), and the limiting ring (13) is located on the shaft body of the transmission shaft (9).

2. The crane slewing platform brake according to claim 1, characterized in that: A rotating cavity (102) is provided inside the housing (1), and a first rotating disk (7) and a second rotating disk (8) are rotatably mounted in the middle of the rotating cavity (102). Surfaces of the first rotating disk (7) and the second rotating disk (8) are respectively provided with a plurality of docking holes (701) and docking shafts (801), and the docking holes (701) and the docking shafts (801) are interlaced and docked.

3. The crane slewing platform brake according to claim 2, characterized in that: The upper end of the first rotating disk (7) is connected to the output end of the driving motor (4), and the lower end of the second rotating disk (8) is connected to the transmission shaft (9). A bearing (10) is provided on the lower side of the rotating cavity (102), and the shaft body of the transmission shaft (9) is located inside the bearing (10).

4. The crane slewing platform brake according to claim 2, characterized in that: A gear ring (103) is fixedly mounted on the inner wall of the lower side of the rotating cavity (102); a stabilizing gear column (11) is provided on the shaft of the transmission shaft (9); a plurality of planetary gears (104) are provided between the stabilizing gear column (11) and the gear ring (103); and the plurality of planetary gears (104) are all located on the lower side of the rotating cavity (102).

5. The crane slewing platform brake according to claim 1, characterized in that: The brake assembly (5) comprises a limit plate (502), the limit plate (502) being fixedly mounted on the upper side of the rotating cavity (102), a plurality of brake springs (5021) being provided at the lower end of the limit plate (502), and a brake disc (504) being provided at the lower end of the brake spring (5021); An annular cover (503) is fixedly installed on the upper side of the rotating cavity (102) and below the limit plate (502); a connecting frame (5033) is installed on the outer side of the brake disc (504); a hydraulic groove (5031) is opened inside the annular cover (503); a plurality of sealing pistons (5032) are movably provided in the hydraulic groove (5031); the upper ends of the plurality of sealing pistons (5032) are fixedly connected to the connecting frame (5033); and the lower ends of the plurality of sealing pistons (5032) are commonly provided with a sealing plate.

6. The crane slewing platform brake according to claim 5, characterized in that: An expansion seat (501) is fixedly mounted on the outer side of the housing (1); a first channel (5011) and a second channel (5012) are provided at the bottom of the expansion seat (501); a liquid inlet channel (5013) is provided on the upper side of the first channel (5011); the liquid inlet channel (5013) is connected in series with the hydraulic tank (5031); and a pipe connecting seat (505) is installed at the lower ends of both the first channel (5011) and the second channel (5012).

7. The crane slewing platform brake according to claim 6, characterized in that: A support spring (506) is installed on the inner wall of the first channel (5011), and a limit lever (507) is movably installed inside the first channel (5011). One end of the limit lever (507) is fixedly connected to the support spring (506), and the body of the limit lever (507) is provided with an interactive groove (5071).

8. The crane slewing platform brake according to claim 7, characterized in that: The locking assembly (6) includes an annular groove (607), the annular groove (607) is provided inside the limiting ring (13), a plurality of supports (608) are fixedly installed inside the annular groove (607), a connecting rod (609) is movably provided inside each of the supports (608), a pressure plate (6091) and a locking seat (6092) are respectively installed at both ends of the connecting rod (609), the shaft body of the transmission shaft (9) is provided with a plurality of locking slots (901), and the locking slots (901) are locked with the locking seat (6092); A limiting sleeve (6081) is provided on the inner wall of the support (608), and a return spring (6082) is installed between the limiting sleeve (6081) and the corresponding connecting rod (609).

9. The crane slewing platform brake according to claim 8, characterized in that: A first flow channel (601) is provided on one side of the annular groove (607), a second flow channel (602) is provided on one side of the liquid inlet channel (5013), a series pipe (603) is installed between the first flow channel (601) and the second flow channel (602), and a one-way solenoid valve (6011) is fixedly installed on the outside of the first flow channel (601).

10. The crane slewing platform brake according to claim 9, characterized in that: A placement groove (604) is provided on one side of the expansion seat (501), a push rod (605) is installed inside the placement groove (604), a through rod (606) is fixedly installed on the output shaft of the push rod (605), the second flow channel (602) passes through one side of the liquid inlet channel (5013), the through rod (606) is movably arranged inside the second flow channel (602), a through hole (6061) is provided on the upper side of the through rod (606), and a guide hole (6062) is provided on the lower side of the through rod (606).

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