Rotary speed reducer of tower crane

Abstract

The utility model belongs to the technical field of tower crane speed reducers, and particularly relates to a rotary speed reducer of a tower crane. Comprising a fixing plate, a driving motor is installed on the fixing plate, and a speed adjusting assembly convenient to maintain is arranged between the fixing plate and the output end of the driving motor in a matched mode. Through the design of the variable gear set, a traditional speed reducer has the capacity of different output speeds, the overall flexibility is improved, the power change of the motor is reduced, and the motor is better protected; through the design of the maintenance cover, a worker can replace the easily damaged output rod more quickly and conveniently, and the output rod can be replaced by simply pulling out the output rod; the overall working efficiency is greatly improved, the staying time of workers at the high position of the tower crane is shortened, and the danger of the workers is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of tower crane reducers, and in particular relates to a tower crane rotary reducer. Background Art

[0002] Tower cranes are large-scale operating equipment at construction sites, which are mainly used to transport building materials vertically in high-rise building construction. The tower crane reducer is an important component of the tower crane. It mainly plays the role of reducing the speed and increasing the torque, converting the high speed of the motor into the appropriate speed and torque required by the tower crane working mechanism.

[0003] During the use of the tower crane, the reducer needs to be regularly maintained and inspected, including checking the condition of the lubricating oil, the wear of the gears, etc.; during construction and maintenance, the traditional reducer only has one set of directional gear sets inside, and the speed change effect is fixed. The speed can only be adjusted by controlling the change in the power of the motor, which is more power-consuming; in addition, when maintaining the reducer, the output end of the reducer needs to be removed, and during the removal process, the entire casing needs to be disassembled, which is more cumbersome and the workers' operation time is longer, which invisibly increases the overall danger; in response to the above problems, a more convenient and flexible tower crane slewing reducer is proposed. Utility Model Content

[0004] In order to solve the problems existing in the background technology, the utility model provides a tower crane slewing reducer; the reducer has a certain speed adjustment capability and is more efficient in maintenance.

[0005] The utility model provides a tower crane slewing reducer, comprising a fixed plate, a driving motor is installed on the fixed plate, and a speed regulating assembly convenient for maintenance is provided between the fixed plate and the output end of the driving motor; the speed regulating assembly convenient for maintenance comprises a lower protective shell fixedly installed on the fixed plate, an upper protective shell is provided on the lower protective shell, a bearing 1 and a bearing 2 are symmetrically provided in the lower protective shell and the upper protective shell, a speed change gear set is provided between the bearing 1 and the bearing 2, a bracket is fixedly installed on the fixed plate, an electric hydraulic rod is fixedly installed on the bracket, the movable end of the electric hydraulic rod is slidably connected with the speed change gear set, the output end of the driving motor is fixedly connected with the speed change gear set, a maintenance cover is hingedly connected on a side of the upper protective shell away from the driving motor, a slot is provided in the bearing 2 on a side away from the driving motor, an output rod is rotatably connected between the lower protective shell, the upper protective shell and the maintenance cover, a limiting strip is provided on the output rod corresponding to the slot, the limiting strip and the slot fit each other, and the output rod is plug-connected with the speed change gear set.

[0006] Furthermore, the speed change gear set includes a transmission rod 1 located between bearing 1 and a transmission rod 2 located between bearing 2, a sleeve is connected to the outer surface of the transmission rod 1, gear 1 and gear 2 are fixedly installed outside the sleeve, a plurality of connecting rods are fixedly installed between gear 1 and gear 2, a slide groove is provided on gear 2, a traction rod is slidably connected in the slide groove, the movable end of the electric hydraulic rod is fixedly connected to the traction rod, gear 3 and gear 4 are fixedly installed on the transmission rod 2, gear 1 and gear 3 are meshed with each other, and gear 2 and gear 4 are meshed with each other.

[0007] Furthermore, the transmission rod 1 is fixedly connected to the output end of the driving motor, and the transmission rod 2 is plug-connected to the output rod.

[0008] Furthermore, the transmission rod 1 is rotatably connected to the lower protective shell and the upper protective shell.

[0009] Furthermore, the traction rod is rotatably connected to the lower protective shell and the upper protective shell.

[0010] Furthermore, a plurality of bolts are provided between the upper protective shell and the lower protective shell.

[0011] Furthermore, a limiting ring is fixedly mounted on the output rod, and a limiting groove is provided on the maintenance cover corresponding to the limiting ring, and the limiting groove and the limiting ring are fitted with each other.

[0012] Beneficial effects of the utility model:

[0013] The utility model uses the design of a variable gear set to enable the traditional reducer to have different output speeds, thereby increasing overall flexibility, reducing power changes to the motor, and providing better protection for the motor.

[0014] The design of the maintenance cover enables workers to replace easily damaged output rods more quickly and conveniently by simply pulling them out. The overall work efficiency is greatly improved, which reduces the time workers spend at high altitudes on the tower crane and reduces the danger to workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front and top stereoscopic view of a tower crane slewing reducer of the utility model.

[0016] Figure 2 The utility model is a partial cross-sectional view of a tower crane slewing reducer after the maintenance cover is opened.

[0017] Figure 3 It is a front view schematic diagram of a tower crane slewing reducer after the upper protective shell is removed according to the utility model.

[0018] Figure 4It is a rear view schematic diagram of a tower crane slewing reducer after the upper protective shell is removed according to the utility model.

[0019] Figure 5 The utility model is a schematic diagram of a speed change gear set of a tower crane slewing reducer.

[0020] Figure 6 The utility model is a schematic diagram of an output rod of a tower crane slewing reducer.

[0021] Figure 7 The utility model is a schematic diagram of a maintenance cover of a tower crane slewing reducer.

[0022] As shown in the figure:

[0023] 1. Fixed plate, 2. Driving motor, 3. Lower protective shell, 4. Upper protective shell, 5. Bearing 1, 6. Bearing 2, 7. Bracket, 8. Electric hydraulic rod, 9. Maintenance cover, 10. Output rod, 11. Limit strip, 12. Transmission rod 1, 13. Transmission rod 2, 14. Sleeve, 15. Gear 1, 16. Gear 2, 17. Connecting rod, 18. Slide, 19. Drawbar, 20. Gear 3, 21. Gear 4, 22. Bolt, 23. Limit ring, 24. Limit groove. DETAILED DESCRIPTION

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

[0025] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0026] Please see all instructions drawings:

[0027] A tower crane slewing reducer comprises a fixed plate 1, a driving motor 2 is mounted on the fixed plate 1, and a speed regulating component convenient for maintenance is provided between the fixed plate 1 and the output end of the driving motor 2;

[0028] A speed regulating assembly convenient for maintenance comprises a lower protective shell 3 fixedly mounted on a fixed plate 1, an upper protective shell 4 is arranged on the lower protective shell 3, bearings 1 5 and 2 6 are symmetrically arranged in the lower protective shell 3 and the upper protective shell 4, a speed gear set is arranged between the bearings 1 5 and 2 6, a bracket 7 is fixedly mounted on the fixed plate 1, an electric hydraulic rod 8 is fixedly mounted on the bracket 7, a movable end of the electric hydraulic rod 8 is slidably connected to the speed gear set, an output end of the drive motor 2 is fixedly connected to the speed gear set, a maintenance cover 9 is hingedly connected to a side of the upper protective shell 4 away from the drive motor 2, a card slot is arranged in the bearing 2 6 on the side away from the drive motor 2, an output rod 10 is rotatably connected between the lower protective shell 3, the upper protective shell 4 and the maintenance cover 9, a limiting strip 11 is arranged on the output rod 10 corresponding to the card slot, the limiting strip 11 and the card slot fit each other, and the output rod 10 is plug-connected to the speed gear set;

[0029] From the above description, it can be seen that a speed gear set is arranged between the lower protective shell 3 and the upper protective shell 4. When the drive motor 2 works normally, the kinetic energy transmitted by the speed gear set makes the output rod 10 have a certain rotation rate. The design of bearing 1 5 and bearing 2 6 makes the friction force of the rotating rod body smaller when rotating; when performing maintenance, the worker only needs to open the maintenance cover 9, and the maintenance cover 9 and the lower protective shell 3 are fixed with threads; the old output rod 10 is taken out, and then the new output rod 10 is inserted into the bearing 2 6, and the limit strip 11 corresponds to the slot in the bearing 2 6, so that the output rod 10 has a stable output environment.

[0030] As a technical optimization scheme of the utility model, the speed gear set includes a transmission rod 12 located between the bearing 1 5 and a transmission rod 2 13 located between the bearing 2 6. The transmission rod 12 is connected with a sleeve 14 on the outer surface, and the sleeve 14 rotates with the transmission rod 12; a gear 15 and a gear 2 16 are fixedly installed on the outer surface of the sleeve 14, and the sleeve 14 drives the gear 15 and the gear 2 16 to rotate; a plurality of connecting rods 17 are fixedly installed between the gear 15 and the gear 2 16, a slide groove 18 is provided on the gear 2 16, and a traction rod 19 is slidably connected in the slide groove 18, and the movable end of the electric hydraulic rod 8 is fixedly connected to the traction rod 19, and a gear 3 20 and a gear 4 21 are fixedly installed on the transmission rod 2 13, and the gear 15 and the gear 3 20 are meshed with each other, and the gear 2 16 and the gear 4 21 are meshed with each other;

[0031] From the above description, it can be seen that by the movement of the electric hydraulic rod 8, the traction rod 19 is moved, so that gear 1 15 and gear 2 16 can be synchronously moved laterally, and either gear 15 and gear 3 20 are meshed with each other, or gear 2 16 and gear 4 21 are meshed with each other. Different transmission rates can be achieved through the meshing between different gears.

[0032] As a technical optimization solution of the utility model, the transmission rod 12 is fixedly connected to the output end of the driving motor 2, and the transmission rod 2 13 is plug-connected to the output rod 10;

[0033] From the above description, it can be known that the driving motor 2 can drive the transmission rod 12 to rotate, the transmission rod 12 makes the transmission rod 2 13 rotate through the speed change gear set, and the transmission rod 2 13 can drive the output rod 10 to rotate.

[0034] As a technical optimization solution of the utility model, the transmission rod 12 is rotatably connected with the lower protective shell 3 and the upper protective shell 4;

[0035] From the above description, it can be seen that the transmission rod 12 is located between the lower protective shell 3 and the upper protective shell 4. When the upper protective shell 3 is removed, the transmission rod 12 can also be removed and replaced.

[0036] As a technical optimization solution of the utility model, the traction rod 19 is rotatably connected with the lower protective shell 3 and the upper protective shell 4;

[0037] It can be seen from the above description that the traction rod 19 is located between the lower protective shell 3 and the upper protective shell 4. When the upper protective shell 4 is removed, the traction rod 19 can also be removed and replaced.

[0038] As a technical optimization solution of the utility model, a plurality of bolts 22 are provided between the upper protective shell 4 and the lower protective shell 3;

[0039] It can be known from the above description that the upper protective shell 4 and the lower protective shell 3 can be firmly connected by the bolts 22 .

[0040] As a technical optimization solution of the utility model, a limit ring 23 is fixedly installed on the output rod 10, and a limit groove 24 is provided on the maintenance cover 9 corresponding to the limit ring 23, and the limit groove 24 and the limit ring 23 fit each other;

[0041] From the above description, it can be seen that the limit ring 23 is arranged on each output rod 10, which can limit the insertion depth of the output rod 10. At the same time, when the maintenance cover 9 is covered, the limit groove 24 in the maintenance cover 9 is stuck on the limit ring 23, so that the output rod 10 has a stable working environment.

[0042] Working principle:

[0043] When performing maintenance, workers only need to open the maintenance cover 9, which is fixed to the lower protective shell 3 with threads; take out the old output rod 10, and then insert the new output rod 10 into the bearing 2 6, and the limit strip 11 corresponds to the slot in the bearing 2 6, so that the output rod 10 has a stable output environment; through the movement of the electric hydraulic rod 8, the traction rod 19 is moved, so that gear 1 15 and gear 2 16 can be synchronously moved laterally, or gear 1 15 and gear 3 20 are meshed with each other, or gear 2 16 and gear 4 21 are meshed with each other, and different transmission rates can be achieved through the meshing between different gears.

[0044] The above describes the utility model and its implementation methods, which are not restrictive. The specific implementation method is only one of the implementation methods of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it, without departing from the purpose of the invention of the utility model, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the utility model.

Claims

1. A tower crane slewing reducer, comprising a fixed plate, on which a drive motor is mounted, characterized in that: A speed regulating assembly for easy maintenance is provided between the fixed plate and the output end of the drive motor; the speed regulating assembly for easy maintenance includes a lower protective shell fixedly installed on the fixed plate, an upper protective shell is provided on the lower protective shell, bearings 1 and 2 are symmetrically provided in the lower protective shell and the upper protective shell, a speed gear set is provided between the bearings 1 and 2, a bracket is fixedly installed on the fixed plate, an electric hydraulic rod is fixedly installed on the bracket, the movable end of the electric hydraulic rod is slidably connected to the speed gear set, the output end of the drive motor is fixedly connected to the speed gear set, a maintenance cover is hingedly connected to the side of the upper protective shell away from the drive motor, a slot is provided in the bearing 2 on the side away from the drive motor, an output rod is rotatably connected between the lower protective shell, the upper protective shell and the maintenance cover, a limit strip is provided on the output rod corresponding to the slot, the limit strip and the slot fit each other, and the output rod is plug-connected to the speed gear set.

2. A tower crane slewing reducer according to claim 1, characterized in that: The speed gear set includes a transmission rod 1 located between bearing 1 and a transmission rod 2 located between bearing 2, a sleeve is connected to the outer surface of the transmission rod 1, gear 1 and gear 2 are fixedly installed outside the sleeve, a plurality of connecting rods are fixedly installed between gear 1 and gear 2, a slide groove is provided on gear 2, a traction rod is slidably connected in the slide groove, the movable end of the electric hydraulic rod is fixedly connected to the traction rod, gear 3 and gear 4 are fixedly installed on the transmission rod 2, gear 1 and gear 3 are meshed with each other, and gear 2 and gear 4 are meshed with each other.

3. A tower crane slewing reducer according to claim 2, characterized in that: The transmission rod 1 is fixedly connected to the output end of the driving motor, and the transmission rod 2 is plug-connected to the output rod.

4. A tower crane slewing reducer according to claim 3, characterized in that: The transmission rod 1 is rotatably connected with the lower protective shell and the upper protective shell.

5. The tower crane slewing reducer according to claim 3, characterized in that: The traction rod is rotatably connected with the lower protective shell and the upper protective shell.

6. The tower crane slewing reducer according to claim 1, characterized in that: A plurality of bolts are arranged between the upper protective shell and the lower protective shell.

7. The tower crane slewing reducer according to claim 1, characterized in that: A limiting ring is fixedly mounted on the output rod, and a limiting groove is provided on the maintenance cover corresponding to the limiting ring, and the limiting groove and the limiting ring are fitted with each other.

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