Brake speed reducer of tower crane

Abstract

The utility model belongs to the technical field of engineering machinery, and discloses a brake speed reducer of a tower crane. The brake speed reducer of the tower crane comprises a front cover plate and a rear cover plate, the front cover plate and the rear cover plate are fixedly installed through bolts, a base is further fixedly installed below the front cover plate and the rear cover plate, a driving motor is fixedly installed in the center of the rear cover plate, one end of a transmission rod is fixedly installed at the output end of the driving motor, and the other end of the transmission rod is fixedly connected with the base. And the other end of the transmission rod extends inwards into the rear cover plate. According to the brake speed reducer of the tower crane, through the design of the auxiliary speed reduction assembly, the speed reduction effect of the speed reducer is improved, impact borne by the speed reducer in the running process is reduced, the service life of elements in the speed reducer is prolonged to a certain degree, rapid disassembly in the overhauling process is facilitated, and therefore the overhauling efficiency is improved to a certain degree.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engineering machinery, concretely is a tower crane brake speed reducer. BACKGROUND

[0002] The speed reducer is an independent component composed of gear transmission, worm transmission and gear-worm transmission enclosed in a rigid shell, commonly used as a speed reduction transmission device between a prime mover and a working machine, which matches the rotational speed and transmits torque between the prime mover and the working machine or actuator, and is widely used in modern machinery.

[0003] The current speed reducer has some problems in operation. When the speed reducer is running, a large impact force may be generated, which affects the service life of the internal components, and lacks certain auxiliary brake components to cooperate with the speed reduction. Therefore, there is an urgent need for a tower crane brake speed reducer to solve the above problems in the market. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of tower crane brake speed reducers, the problem raised in background technology is solved.

[0005] To achieve the above object, the utility model is realized by the following technical scheme: a kind of tower crane brake speed reducer, including front cover plate and rear cover plate, front cover plate and rear cover plate are fixedly installed between by bolt, the bottom of the front cover plate and rear cover plate is also fixedly installed with base, the center position of the rear cover plate is fixedly installed with driving motor, the output end of the driving motor is fixedly installed with one end of transmission rod, and the other end of transmission rod extends to the rear cover plate inward, the inner wall of the rear cover plate is rotatably connected with mounting disc by bearing, the mounting disc is also fixedly installed with transmission rod;

[0006] Three mounting rods are fixedly installed on the mounting disc, and three mounting rods are rotatably connected with planetary gear by bearing, the inner wall of the rear cover plate is fixedly installed with inner tooth ring, three planetary gears are engaged with inner tooth ring, the transmission rod is also fixedly installed with sun gear, the sun gear is located between three planetary gears, the sun gear is engaged with three planetary gears by gear teeth, the rear cover plate is also provided with planet carrier, and the three ports of planet carrier are respectively inserted with corresponding mounting rod, the rear cover plate is provided with auxiliary speed reduction assembly.

[0007] Preferably, the auxiliary deceleration assembly comprises a circular ring arranged in the rear cover plate, an insertion rod fixedly connected to the outer side of the circular ring, an insertion adapter fixedly installed on the outer side of the inner gear ring and corresponding to the position of the insertion rod, the insertion rod and the insertion adapter being inserted, an annular groove being formed in the circular ring, and a hydraulic cylinder one fixedly connected to the opposite inner walls of the annular groove.

[0008] Preferably, the auxiliary deceleration assembly further comprises a controller fixedly installed in a mounting groove on the circular ring, a hydraulic cylinder two fixedly connected to the outer side of each port of the planet carrier, and a friction plate two fixedly connected to the output end of the hydraulic cylinder two, the friction plate two being located in the annular groove and being in contact with the corresponding friction plate one.

[0009] Preferably, the front cover plate is rotatably connected to a connector through a bearing, and the connector is fixedly installed on the corresponding end face of the transmission rod.

[0010] Preferably, the planet carrier is triangular.

[0011] Preferably, the friction plate two is made of wear-resistant ceramic composite material.

[0012] By adopting the foregoing technical scheme, the utility model has the advantages of:

[0013] The tower crane brake decelerator improves the deceleration effect of the decelerator, reduces the impact on the decelerator during operation, prolongs the service life of the elements in the decelerator to a certain extent, facilitates quick disassembly during maintenance, and improves the maintenance efficiency to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the front view structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the utility model Figure 2 A-A sectional structure;

[0017] Figure 4 It is a schematic diagram of the utility model Figure 3 A enlarged structure at the position A;

[0018] Figure 5 It is a schematic diagram of the bottom view structure of the utility model;

[0019] Figure 6 It is a schematic diagram of the utility Figure 5 C-C sectional structure.

[0020] Fig. 1, front cover plate; 2, rear cover plate; 3, base; 4, drive motor; 5, transmission rod; 6, mounting disc;

[0021] 61, mounting rod; 62, planetary gear; 63, inner ring gear; 64, sun gear; 65, planet carrier;

[0022] 7, auxiliary deceleration assembly; 71, circular ring; 72, insertion rod; 73, insertion device; 74, annular groove; 75, hydraulic cylinder one; 76, friction plate one; 77, controller; 78, hydraulic cylinder two; 79, friction plate two;

[0023] 8, connector. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Please refer to Figures 1-6 The present application provides a technical solution: a tower crane brake decelerator, comprising a front cover plate 1 and a rear cover plate 2, the front cover plate 1 and the rear cover plate 2 are fixedly installed through bolts, and a base 3 is further fixedly installed below the front cover plate 1 and the rear cover plate 2. A drive motor 4 is fixedly installed at the center position of the rear cover plate 2, one end of a transmission rod 5 is fixedly installed at the output end of the drive motor 4, and the other end of the transmission rod 5 extends inwardly into the rear cover plate 2. An inner wall of the rear cover plate 2 is rotatably connected with a mounting disc 6 through a bearing, and the mounting disc 6 is further fixedly installed with the transmission rod 5.

[0026] The drive motor 4 and the transmission rod 5 provide power for the decelerator, and the rear cover plate 2 and the front cover plate 1 are connected through bolts for quick disassembly design, which is convenient for subsequent maintenance. The mounting disc 6 can rotate in the rear cover plate 2, and the corresponding position in the rear cover plate 2 is provided with a bearing, and the driving force of the mounting disc 6 is driven by the transmission rod 5.

[0027] The mounting disc 6 is fixedly provided with three mounting rods 61, each of which is rotatably connected with a planetary gear 62 through a bearing, the inner wall of the rear cover plate 2 is fixedly provided with an inner ring gear 63, each of the three planetary gears 62 is in mesh with the inner ring gear 63, the transmission rod 5 is further fixedly provided with a sun gear 64, the sun gear 64 is located between the three planetary gears 62, the sun gear 64 is in mesh with the three planetary gears 62 through the teeth, the rear cover plate 2 is further provided with a planet carrier 65, and the three ports of the planet carrier 65 are respectively inserted with the corresponding mounting rods 61, the rear cover plate 2 is provided with an auxiliary speed reduction assembly 7, the auxiliary speed reduction assembly 7 comprises a circular ring 71, the circular ring 71 is arranged in the rear cover plate 2, the outer side of the circular ring 71 is fixedly connected with a plug rod 72, the outer side of the inner ring gear 63 is fixedly provided with a plug-in device 73 at the position corresponding to the plug rod 72, the plug rod 72 is inserted with the plug-in device 73, the circular ring 71 is provided with an annular groove 74, the opposite inner walls of the annular groove 74 are fixedly connected with hydraulic cylinders one 75, the output ends of the two hydraulic cylinders one 75 are fixedly provided with friction plates one 76, the auxiliary speed reduction assembly 7 further comprises a controller 77, the controller 77 is fixedly arranged in the mounting groove of the circular ring 71, the outer sides of the three ports of the planet carrier 65 are fixedly connected with hydraulic cylinders two 78, and the output ends of the hydraulic cylinders two 78 are fixedly connected with friction plates two 79, the friction plates two 79 are located in the annular groove 74 and are in contact with the corresponding friction plates one 76.

[0028] The driving force of the sun gear 64 comes from the transmission rod 5, when the transmission rod 5 drives the sun gear 64, the sun gear 64 will drive the planetary gear 62 to rotate, when the planetary gear 62 rotates, it will rotate along the path in the inner ring gear 63, thereby achieving the effect of speed reduction, the rotating planetary gear 62 will drive the planet carrier 65 to rotate, the circular ring 71 is limited by the plug-in device 73 on the inner ring gear 63 through the plug rod 72, it should be noted that the number of plug-in devices 73 and plug rods 72 is four, the hydraulic cylinders one 75 act on the friction plates one 76 to move relatively and contact with the friction plates two 79, it should be noted that the hydraulic cylinders one 75 and the hydraulic cylinders two 78 are controlled by the controller 77, the output end of the hydraulic cylinders two 78 drives the friction plates two 79 to move into the annular groove 74, the hydraulic cylinders one 75 act on the contact force of the friction plates one 76 and the friction plates two 79, when the force is light, the friction coefficient is small, the effect of auxiliary speed reduction is small, when the force is heavy, the friction coefficient is large, the effect of auxiliary speed reduction is large, the controller 77 is a common control element.

[0029] The connector 8 is rotatably connected with the transmission rod 5 through a bearing.

[0030] The connector 8 is connected with an external component.

[0031] The planet carrier 65 is triangular.

[0032] The friction plate two 79 is a wear-resistant ceramic composite material.

[0033] Working principle: when the tower crane brake reducer works, the output end of the driving motor 4 transmits power to the transmission rod 5, so that the transmission rod 5 rotates, when the transmission rod 5 rotates, the mounting disc 6 rotates, the sun gear 64 on the transmission rod 5 also rotates at the same time, the sun gear 64 drives the planetary gear 62 to rotate, the outer meshing teeth of the planetary gear 62 mesh with the inner meshing teeth of the inner tooth ring 63, so as to realize the effect of speed reduction, when the planetary gear 62 rotates, the planet carrier 65 will rotate, the output end of the hydraulic cylinder two 78 on the planet carrier 65 will be controlled by the controller 77 to push the friction plate two 79 outward, and move the friction plate two 79 to the annular groove 74, the output end of the hydraulic cylinder one 75 controls the upper and lower surfaces of the friction plate one 76 and the friction plate two 79 to contact, so as to complete the secondary speed reduction.

[0034] It should be noted that, in the present text, relational terms such as first and second and the like can merely be used to distinguish one entity or action from another, without necessarily requiring or implying that there is any such actual relationship or order between or among the entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0035] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A tower crane brake retarder comprising a front cover plate (1) and a rear cover plate (2), characterized in that: The front cover plate (1) and the rear cover plate (2) are fixedly installed by bolts, the lower part of the front cover plate (1) and the rear cover plate (2) is also fixedly installed with a base (3), the center position of the rear cover plate (2) is fixedly installed with a driving motor (4), one end of the output end of the driving motor (4) is fixedly installed with a transmission rod (5), and the other end of the transmission rod (5) extends inwardly into the rear cover plate (2), the inner wall of the rear cover plate (2) is rotatably connected with a mounting disc (6) through a bearing, and the mounting disc (6) is also fixedly installed with the transmission rod (5); Three mounting rods (61) are fixedly installed on the mounting disc (6), and each of the three mounting rods (61) is rotatably connected with a planetary gear (62) through a bearing, an inner gear ring (63) is fixedly installed on the inner wall of the rear cover plate (2), each of the three planetary gears (62) is engaged with the inner gear ring (63), a sun gear (64) is also fixedly installed on the transmission rod (5), the sun gear (64) is located between the three planetary gears (62), the sun gear (64) is engaged with the three planetary gears (62) through the teeth, and a planet carrier (65) is also arranged in the rear cover plate (2), and three ports of the planet carrier (65) are respectively inserted into the corresponding mounting rods (61).

2. A tower crane brake retarder according to claim 1, characterised in that: The auxiliary speed reduction assembly (7) comprises a circular ring (71), the circular ring (71) is arranged in the rear cover plate (2), the outer side of the circular ring (71) is fixedly connected with a plug rod (72), the outer side of the inner gear ring (63) and the position corresponding to the plug rod (72) are fixedly installed with a plug-in device (73), the plug rod (72) is inserted into the plug-in device (73), and an annular groove (74) is formed in the circular ring (71), the opposite inner walls of the annular groove (74) are fixedly connected with hydraulic cylinders one (75), and the output ends of the two hydraulic cylinders one (75) are fixedly installed with friction plates one (76).

3. A tower crane brake retarder according to claim 2, characterised in that: The auxiliary speed reduction assembly (7) further comprises a controller (77), the controller (77) is fixedly installed in a mounting groove on the circular ring (71), the outer sides of the three ports of the planet carrier (65) are fixedly connected with hydraulic cylinders two (78), the output ends of the hydraulic cylinders two (78) are fixedly connected with friction plates two (79), and the friction plates two (79) are located in the annular groove (74) and are in contact with the corresponding friction plates one (76).

4. A tower crane brake retarder according to claim 3, characterised in that: The connector (8) is rotatably connected with the transmission rod (5) through a bearing.

5. A tower crane brake retarder according to claim 4, characterised in that: The planet carrier (65) is triangular.

6. A tower crane brake retarder according to claim 5, characterised in that: The friction plates two (79) are made of wear-resistant ceramic composite material.

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