Reducing mechanism and telescopic boom crane

Abstract

The utility model discloses a speed reducing mechanism and a telescopic boom crane. The speed reducing mechanism comprises a box body, an input shaft, an output shaft, a first speed reducing gear assembly and a second speed reducing gear assembly, and the first speed reducing gear assembly and the second speed reducing gear assembly are both rotationally connected into the box body; the input end of the first reduction gear assembly is connected with the input shaft, and the output end of the first reduction gear assembly is connected with the second reduction gear assembly through a connecting gear. The second reduction gear assembly comprises a second large gear and two second small gears meshed with the second large gear. According to the transmission system, the two second pinions are meshed with the second large gear at the same time, the number of teeth meshed at the same time is increased, the transmission stability is improved, loads can be dispersed, the bearing capacity of the gears is improved, the structural strength of all the gears of the second reduction gear assembly is improved, and the reliability of the whole transmission system is improved. In addition, the speed reducing mechanism is arranged in one box body, so that the occupied space is effectively saved, and the structure is more compact.

Description

Technical Field

[0001] The utility model relates to the technical field of relevant equipment of a power exchange station, in particular to a speed reduction mechanism and a telescopic boom crane. Background Art

[0002] A power exchange station is an energy station that provides charging and rapid replacement of power batteries for electric vehicles. It centrally stores, charges, and uniformly distributes a large number of batteries through a centralized charging station, and provides battery replacement services for electric vehicles in the battery distribution station. In the power exchange station, a crane plays an important role. It is mainly used for the handling, hoisting, and unloading of new energy batteries, and for the replacement and maintenance of new energy batteries in the power exchange station, greatly improving the work efficiency and accuracy.

[0003] However, in the existing cranes of power exchange stations, generally, a wire rope is used to lift a spreader. The wire rope is wound around a reel, and the reel is rotated by a motor to perform the operations of taking in and paying out the wire rope. The motor and the reel are connected through a speed reducer. Generally, there is only one contact point between the existing speed reducer and the reel, resulting in poor structural strength of the speed reducer, which will affect the normal operation of the equipment after long-term use.

[0004] In addition, most of the existing power exchange station structures adopt a container structure. Most of the cranes are large in volume, occupying a large space when installed in a container, resulting in a large volume of the container, which virtually increases the transportation difficulty, as well as the material and transportation costs. Summary of the Utility Model

[0005] One of the purposes of the utility model is to provide a speed reduction mechanism to solve the problems of low structural strength and large occupied space existing in the speed reducers of existing lifting devices in power exchange stations.

[0006] Another purpose of the utility model is to provide a telescopic boom crane to solve the problems of low structural strength and large occupied space existing in the existing lifting devices in power exchange stations.

[0007] To solve the above problems, one of the purposes of the utility model is realized as follows:

[0008] A speed reduction mechanism, comprising: a box body, an input shaft, an output shaft, a first speed reduction gear assembly, and a second speed reduction gear assembly. The first speed reduction gear assembly and the second speed reduction gear assembly are both rotatably connected in the box body;

[0009] The input end of the first speed reduction gear assembly is connected to the input shaft, and the output end of the first speed reduction gear assembly is connected to the second speed reduction gear assembly through a connecting gear;

[0010] The second reduction gear assembly includes a second large gear and two second small gears, and the two second small gears mesh with the second large gear.

[0011] Wherein, the first reduction gear assembly includes a first input member and a first output member meshing with the first input member, the axial direction of the first output member is perpendicular to the axial direction of the first input member, and the first input member is coaxially arranged on the input shaft.

[0012] Wherein, the first input member includes a first bevel pinion, the first output member includes a first bevel gear meshing with the first bevel pinion, and the first bevel pinion is coaxially and fixedly sleeved on the input shaft.

[0013] Wherein, a first transmission shaft is fixedly connected at the central axis of the first output member, the connecting gear is coaxially and fixedly connected to the first transmission shaft, and the connecting gear meshes with the two second small gears.

[0014] Wherein, the height of the side of the box body where the second large gear is installed is less than the height of the side of the box body where the first output member is installed.

[0015] Wherein, the output shaft is coaxially and fixedly connected to the second large gear.

[0016] To solve the above problems, the second object of the present utility model is achieved as follows:

[0017] A telescopic boom crane includes the above reduction mechanism, and further includes:

[0018] A connecting frame;

[0019] A telescopic frame, slidably connected to the connecting frame;

[0020] A load lifting device, connected to a lifting appliance through a steel wire rope to adjust the lifting of the lifting appliance. The load lifting device includes a lifting frame slidably connected to the telescopic frame and a wire reel for winding the steel wire rope. The reduction mechanism is arranged in the lifting frame, and the wire reel is coaxially and fixedly connected to the output shaft of the reduction mechanism;

[0021] A driving motor, fixedly connected to the input shaft of the reduction mechanism.

[0022] Wherein, the connecting frame includes a first guide rail and a sliding frame slidably connected to the first guide rail. The telescopic frame is slidably connected to the sliding frame, and the sliding direction of the telescopic frame is perpendicular to the sliding direction of the sliding frame.

[0023] Among them, the connection structures between the sliding frame and the first guide rail, between the telescopic frame and the sliding frame, and between the hanging frame and the telescopic frame all adopt a transmission structure of gear and rack meshing.

[0024] Among them, the hanging frame has a rectangular box structure.

[0025] The beneficial effects of the present utility model are:

[0026] In the present utility model, the number of the second small gears is two, and the two second small gears are simultaneously meshed with the second large gear, so that there are two meshing points between the second large gear and the second small gear, that is, there are two contact points, increasing the number of simultaneously meshed teeth and improving the transmission smoothness. The two second small gears are simultaneously meshed with the second large gear, which can disperse the load, improve the bearing capacity of the gears, increase the structural strength of each gear of the second reduction gear assembly, enable it to bear a greater load, and can improve the reliability of the entire transmission system. In addition, the two-stage reduction structure can enable the reduction mechanism to have a larger reduction ratio and can provide a larger torque.

[0027] In addition, the present utility model installs the reduction mechanism in a box body, effectively saving the occupied space, making the structure more compact, and enabling the structure to be flattened. After combining it with the connecting frame, telescopic frame, lifting device, and driving motor, the entire structure is compact and flattened, reducing the occupied space in terms of height. When installed in a container, the volume of the container can be reduced, and the material cost is virtually reduced. In addition, the modular detachable connection structures of the reduction mechanism, connecting frame, telescopic frame, and lifting device can disassemble each module for transportation during transportation, reducing the transportation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0029] Figure 1 is a schematic structural diagram of the reduction mechanism of the present utility model;

[0030] Figure 2 is a schematic structural diagram of the reduction mechanism after removing the box body;

[0031] Figure 3 is an external view of the reduction mechanism of the present utility model;

[0032] Figure 4 is a schematic structural diagram of the telescopic boom crane of the present utility model;

[0033] Figure 5 is a schematic partial structural diagram of the telescopic boom crane.

[0034] DESCRIPTION OF THE REFERENCE NUMERALS

[0035] 1. Reduction mechanism; 11. Housing; 12. Input shaft; 13. Output shaft; 14. First reduction gear assembly; 141. First bevel pinion; 142. First bevel gear; 15. Second reduction gear assembly; 151. Second pinion; 152. Second gear; 16. Connecting gear; 17. First transmission shaft; 2. Connecting frame; 21. First guide rail; 22. Sliding frame; 23. Sliding seat; 24. First motor; 25. Shaft rod; 3. Telescopic frame; 31. Telescopic arm; 32. Second motor; 4. Hoisting device; 41. Hanger; 42. Reeling cylinder; 421. Wire groove; 43. Third motor; 44. Fixed pulley; 5. Driving motor; 6. Suspension hook; 7. Steel wire rope; 8. Planetary reducer; 91. Rack; 92. Gear. Specific embodiments

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Many specific details are set forth in the following description in order to fully understand the present invention, but the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0037] Embodiment 1:

[0038] As Figures 1 - 3 shown, a reduction mechanism 1 of the present invention includes: a housing 11, an input shaft 12, an output shaft 13, a first reduction gear assembly 14, and a second reduction gear assembly 15. The first reduction gear assembly 14 and the second reduction gear assembly 15 are both rotatably connected in the housing 11. The input end of the first reduction gear assembly 14 is connected to the input shaft 12, and the output end of the first reduction gear assembly 14 is connected to the second reduction gear assembly 15 through a connecting gear 16. The second reduction gear assembly 15 includes a second gear 152 and two second pinions 151. The two second pinions 151 are meshed with the second gear 152.

[0039] As Figure 1 , Figure 2As shown, in the present utility model, the number of the second pinions 151 is two. The two second pinions 151 are simultaneously meshed with the second large gear 152, so that there are two meshing points between the second large gear 152 and the second pinions 151, that is, there are two contact points, increasing the number of teeth meshed simultaneously and improving the smoothness of transmission. The two second pinions 151 are simultaneously meshed with the second large gear 152, which can disperse the load, improve the load-bearing capacity of the gears, increase the structural strength of each gear of the second reduction gear assembly 15, enabling it to bear a greater load, and can improve the reliability of the entire transmission system. In addition, the two-stage reduction structure can enable the reduction mechanism 1 to have a larger reduction ratio and can provide a larger torque.

[0040] In this embodiment, the first reduction gear assembly 14 includes a first input member and a first output member meshed with the first input member. The axial direction of the first output member is perpendicular to the axial direction of the first input member. The first input member is coaxially arranged on the input shaft 12, and the input shaft 12 is horizontally arranged. In one embodiment, the first input member may include a worm, and the first output member may include a turbine. Through the transmission structure of the cooperation between the worm and the turbine, a right-angle transmission for speed reduction can be achieved; in another embodiment, the first input member may also include a first bevel pinion 141, and the first output member may also include a first bevel gear 142 meshed with the first bevel pinion 141. While achieving a right-angle transmission for speed reduction, the transmission efficiency can be improved and the bearing capacity between the gears can be enhanced. In this embodiment, the second structure is adopted, that is: the first input member includes a first bevel pinion 141, the first output member includes a first bevel gear 142 meshed with the first bevel pinion 141, and the first bevel pinion 141 is coaxially and fixedly sleeved on the input shaft 12. In this embodiment, regarding the large gear and the small gear, by comparing the diameters of the addendum circles, the diameter of the addendum circle of the large gear is greater than the diameter of the addendum circle of the small gear.

[0041] As Figure 1 、 Figure 2As shown in the figure, a first transmission shaft 17 is fixedly connected to the central axis of the first output member. A connecting gear 16 is coaxially and fixedly connected to the first transmission shaft 17. The connecting gear 16 meshes with two second pinions 151. In this embodiment, the input shaft 12 is horizontally arranged, and the central axis of the first bevel pinion 141 is on the same straight line as the central axis of the input shaft 12. A first transmission shaft 17 is fixedly connected to the central axis of the first bevel gear 142, that is, the first transmission shaft 17 is coaxially and fixedly arranged through the central axis of the first bevel gear 142. The central axis of the first transmission shaft 17 is vertically arranged, and the central axis of the first transmission shaft 17 is perpendicular to the central axis of the input shaft 12. The central axis of the first transmission shaft 17 and the central axis of the input shaft 12 are in the same vertical plane, which can make the structure of the speed reducer more compact. The first bevel gear 142 and the connecting gear 16 are respectively arranged on both sides of the first transmission shaft 17 in the axial direction. The diameter of the addendum circle of the connecting gear 16 is smaller than the diameter of the first bevel gear 142, and the diameter of the addendum circle of the connecting gear 16 is the same as the diameter of the addendum circle of the second pinion 151.

[0042] As Figure 1 , Figure 3 shown in the figure, wherein, the height of the side of the box body 11 where the second large gear 152 is installed is smaller than the height of the side of the first output member (i.e., the first bevel gear 142) of the box body 11. In this embodiment, the box body 11 is in an L-shaped closed box structure. Axial ends of the first transmission shaft 17 are respectively rotationally connected to the upper and lower sides of the box body 11 through bearings. Shafts are fixedly arranged through the central axes of the two second pinions 151, and the two shafts are rotationally connected to the box body 11 through bearings.

[0043] The output shaft 13 is coaxially and fixedly connected to the second large gear 152. One axial end of the output shaft 13 is fixedly connected to the end face of one axial end of the second large gear 152. In this embodiment, the output shaft 13 is vertically arranged, the bottom end of the output shaft 13 is fixedly connected to the top end of the second large gear 152, and the second large gear 152 is rotationally connected to the box body 11. The top end of the output shaft 13 is used to connect the wire reel 42. In the present utility model, the speed reduction mechanism 1 is arranged in the L-shaped box body 11, and the wire reel 42 can be arranged at a low position outside the box body 11 to make the structure more compact. The cooperation of the two second pinions 151 and the connecting gear 16 can increase the horizontal distance and can accommodate a wire reel 42 with a larger outer diameter.

[0044] Embodiment 2:

[0045] As Figure 4 , Figure 5 shown in the figure, a telescopic boom crane of the present utility model includes the speed reduction mechanism 1 of Embodiment 1, and further includes a connecting frame 2, a telescopic frame 3, a hoisting device 4, and a driving motor 5.

[0046] Among them, in order to be able to adjust the spreader in multiple directions, the connecting frame 2 includes a first guide rail 21 and a sliding frame 22 slidably connected to the first guide rail 21. The telescopic frame 3 is slidably connected to the sliding frame 22, and the sliding direction of the telescopic frame 3 is perpendicular to the sliding direction of the sliding frame 22, enabling the telescopic boom crane to extend and adjust in two perpendicular directions (i.e., the X-axis direction and the Y-axis direction). It can be adjusted in multiple directions by one crane, simplifying the structure and saving space on the premise of realizing multi-directional adjustment. In this embodiment, the first guide rail 21 includes two parallel and oppositely arranged rail bars, and the sliding frame 22 is slidably connected between the two rail bars of the first guide rail 21. On both sides of the upper part of the sliding frame 22 along the direction perpendicular to the axial direction of the first guide rail 21, sliding seats 23 are fixedly connected. Rollers are rotatably connected to the sliding seats 23, and sliding grooves for slidably cooperating with the rollers are formed in the corresponding rail bars. A first motor 24 is arranged between the two sliding seats 23. The output shaft of the first motor 24 is fixedly connected to a double-shaft output reduction gearbox. The two output shafts of the double-shaft output reduction gearbox are respectively connected to the corresponding sliding seats 23 through shaft rods 25. One end of the shaft rod 25 is connected to the output shaft of the first motor 24 through a universal coupling, and the other end of the shaft rod 25 is connected to the sliding seat 23 through a universal coupling, which can ensure that the first motor 24 can stably drive the sliding frame 22 to slide. The connection structure between the sliding frame 22 and the first guide rail 21 adopts a transmission structure in which a gear 92 meshes with a rack 91. Specifically, a gear is rotatably connected to the sliding seat 23, the gear 92 is connected to the corresponding shaft rod 25 through a universal coupling, and a rack 91 for meshing with the gear 92 is arranged on the corresponding rail bar of the first guide rail 21. The axial direction of the rack 91 is parallel to the axial direction of the first guide rail 21, so that the rotation of the two gears 92 can be adjusted simultaneously with the simplest structure, making the transmission structure more compact and the transmission structure more stable.

[0047] As Figure 4 , Figure 5 shown, the telescopic frame 3 is slidably connected to the connecting frame 2. The sliding direction of the telescopic frame 3 is perpendicular to the sliding direction of the sliding frame 22. In this embodiment, the telescopic frame 3 includes two parallel telescopic arms 31. A plurality of rollers are rotatably connected to both sides of the telescopic frame 3 perpendicular to its sliding direction, and sliding grooves for slidably cooperating with the rollers are formed on each telescopic arm. The connection structure between the telescopic frame 3 and the sliding frame 22 adopts a transmission structure in which a gear 92 meshes with a rack 91, increasing the smoothness of the transmission. Specifically, a rack 91 is fixedly arranged on one of the telescopic arms. The axial direction of the rack 91 is parallel to the axial direction of the telescopic arm. A gear 92 for meshing with the rack 91 is rotatably connected to the corresponding side of the sliding frame 22, and a second motor 32 is installed on the sliding frame 22. The second motor 32 drives the gear 92 to rotate through a reducer.

[0048] The hoisting device 4 is connected to the lifting appliance 6 through a steel wire rope 7 to adjust the lifting of the lifting appliance 6. The hoisting device 4 includes a hanging bracket 41 slidably connected to the telescopic frame 3 and a wire reel 42 for winding the steel wire rope 7 (as Figure 3 shown). The reduction mechanism 1 is arranged inside the hanging bracket 41. The wire reel 42 is coaxially and fixedly connected to the output shaft 13 of the reduction mechanism 1. The lifting appliance 6 can adopt the lifting appliance in the prior art and does not belong to the innovation point of the present utility model. In this embodiment, the housing 11 of the reduction mechanism 1 has an L-shaped housing structure. The height of the side of the housing 11 where the second large gear 152 is installed is less than the height of the side of the first output member (i.e., the first conical large gear 142) of the housing 11, that is, the top surface of the side of the housing 11 where the second large gear 152 is installed is lower than the top surface of the side of the first output member of the housing 11. In this embodiment, the top surface of the side of the housing 11 where the second large gear 152 is installed is called the high surface of the housing 1, and the top surface of the side of the first output member of the housing 11 is called the low surface of the housing 1. The wire reel 42 is arranged on the low surface of the housing 11 of the reduction mechanism 1. The bottom end of the wire reel 42 is fixedly connected to the top end of the output shaft 13. The central axis of the wire reel 42 is vertically arranged. Four wire grooves 421 are axially formed in the wire reel 42, and each wire groove 421 is correspondingly wound with a steel wire rope 7. In this embodiment, four fixed pulleys 44 are rotatably connected at the four corners inside the hanging bracket 41. One end of the steel wire rope 7 is fixedly connected to the corresponding wire groove 421 of the wire reel 42. After the other end is wound around the corresponding wire groove 421 for multiple turns, it bypasses the corresponding fixed pulley 44 and is fixedly connected to the lifting appliance 6. In the present utility model, multiple wire grooves 421 are formed in the wire reel 42 to wind multiple steel wire ropes. The winding of multiple steel wire ropes is realized through one wire reel, replacing the existing structural design that requires multiple wire reels to wind multiple steel wire ropes, reducing the number of transmission structures, realizing the simultaneous adjustment of the winding and unwinding of multiple steel wire ropes, achieving the consistency of the winding and unwinding of multiple steel wire ropes, and the reduction of components also effectively saves the occupied space and makes the structure more compact. The driving motor 5 is fixedly connected to the input shaft 12 of the reduction mechanism 1. In this embodiment, the driving motor 5 is fixedly connected to the input shaft 12 of the reduction mechanism 1 through a planetary speed reducer 8, and the planetary speed reducer 8 is a standard planetary speed reducer in the prior art. The hanging bracket 41 has a rectangular box structure. The driving motor 5, the reduction mechanism 1, the wire reel 42, and the fixed pulley 44 of the first embodiment are all arranged inside the box structure, which not only makes the structure more compact and effectively saves space, but also is beautiful. Through the combination of the reduction mechanism 1, the connecting frame 2, the telescopic frame 3, the hoisting device 4, and the driving motor 5, the present utility model realizes the compression of the entire device in the height space.

[0049] As Figure 4As shown, rollers are rotatably connected to the opposite sides of the hanger 41, and sliding grooves for slidably connecting with the rollers are formed in the telescopic arms 31 on the corresponding sides of the telescopic frame 3. The connection structure between the hanger 41 and the telescopic frame 3 adopts a transmission structure in which a gear 92 meshes with a rack 91. Specifically, a rack 91 is fixedly arranged on another telescopic arm 31, the axial direction of the rack 91 is parallel to the axial direction of the telescopic arm 31, a third motor 43 is fixedly installed on the outer side of the hanger 41, and the third motor 43 is connected through a speed reducer to a gear 92 for meshing with the rack 91 of another telescopic arm 31. In the present utility model, by adjusting the sliding of each structure through the meshing of the gear 92 and the rack 91, the sliding can be made more stable, and the problem of oil leakage in the hydraulic cylinder drive can be avoided. In addition, between the first guide rail 21 and the sliding frame 22, between the sliding frame 22 and the telescopic frame 3, and between the telescopic frame 3 and the hanger 41 of the present application, sliding cooperation is realized through rollers and sliding grooves, and transmission connection is realized through the meshing of the gear 92 and the rack 91. The combination of the two realizes the detachable modular connection between each structure, so that each module can be separated first and then transported, reducing the transportation difficulty and transportation cost.

[0050] Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

Claims

1. A speed reduction mechanism, characterized in that, Comprising: A box body, an input shaft, an output shaft, a first reduction gear assembly, and a second reduction gear assembly. The first reduction gear assembly and the second reduction gear assembly are both rotatably connected within the box body; The input end of the first reduction gear assembly is connected to the input shaft, and the output end of the first reduction gear assembly is connected to the second reduction gear assembly through a connecting gear; The second reduction gear assembly includes a second large gear and two second small gears. The number of the second small gears is two, and the two second small gears mesh with the second large gear.

2. The reduction mechanism according to claim 1, wherein The first reduction gear assembly includes a first input member and a first output member meshing with the first input member. The axial direction of the first output member is perpendicular to the axial direction of the first input member, and the first input member is coaxially arranged on the input shaft.

3. A speed reduction mechanism according to claim 2, characterized in that, The first input member includes a first conical pinion, and the first output member includes a first conical gear meshing with the first conical pinion. The first conical pinion is coaxially and fixedly sleeved on the input shaft.

4. A speed reduction mechanism according to claim 2, characterized in that, A first transmission shaft is fixedly connected at the central axis of the first output member. The connecting gear is coaxially and fixedly connected to the first transmission shaft, and the connecting gear meshes with the two second small gears.

5. A speed reduction mechanism according to claim 2, characterized in that, The height of the second large gear installation side of the box body is less than the height of the first output member installation side of the box body.

6. The reduction mechanism according to claim 1, characterized in that The output shaft is coaxially and fixedly connected to the second large gear.

7. A telescopic boom crane, characterized in that, Comprising the reduction mechanism according to any one of claims 1-6, further comprising: A connecting frame; A telescopic frame, slidably connected to the connecting frame; 41 A hoisting device, connected to a spreader through a steel wire rope to adjust the lifting of the spreader. The hoisting device includes a hanging frame slidably connected to the telescopic frame and a wire reel for winding the steel wire rope. The reduction mechanism is arranged within the hanging frame, and the wire reel is coaxially and fixedly connected to the output shaft of the reduction mechanism; A driving motor, fixedly connected to the input shaft of the reduction mechanism.

8. A telescopic boom crane according to claim 7, characterized in that, The connecting frame includes a first guide rail and a sliding frame slidably connected to the first guide rail. The telescopic frame is slidably connected to the sliding frame, and the sliding direction of the telescopic frame is perpendicular to the sliding direction of the sliding frame.

9. The telescopic boom crane according to claim 8, wherein The connection structure between the sliding frame and the first guide rail, the connection structure between the telescopic frame and the sliding frame, and the connection structure between the hanging frame and the telescopic frame all adopt a transmission structure of a gear meshing with a rack.

10. A telescopic boom crane according to claim 7, characterized in that, The hanging frame has a rectangular box structure.

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