Compact lifting motor of electric hoist

Abstract

The utility model belongs to the technical field of electric hoists, and relates to a compact type lifting motor of an electric hoist, which comprises a lifting motor and a gear box, the lifting motor comprises a motor cylinder and a rotor shaft, and an input gear and an output gear which are in transmission connection are arranged in the gear box. An input gear shaft of the input gear and an output gear shaft of the output gear are rotationally connected to the gearbox, an input spline is formed at the front end of the rotor shaft, an output spline is formed at the rear end of the output gear shaft, and the end of the rotor shaft extends into the gearbox and is in transmission connection with the input gear through the input spline. And the rear end part of the output gear shaft extends out of the gear box and is in transmission connection with the winding drum through an output spline. The compact lifting motor of the electric hoist provided by the utility model is simpler and more compact in structure, smaller in occupied space, good in transmission performance and high in strength.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric hoists and relates to a compact lifting motor of the electric hoist. Background Art

[0002] Wire rope electric hoist has the advantages of compact structure, light weight, small size, strong versatility of parts, and easy operation. It is widely used in loading and unloading heavy objects, mechanical welding, installation and movement of mechanical equipment, etc. The lifting mechanism of the electric hoist includes a wire rope drum and a lifting motor that drives the wire rope drum. The lifting motor drives the wire rope drum to rotate, and then retracts and releases the wire rope to lift the heavy objects.

[0003] The hoisting motor needs to be used with a reduction gearbox. The existing transmission structure is: the rotor shaft of the hoisting motor is connected to the input shaft of the gearbox through a coupling, and the output shaft of the gearbox is connected to the drum shaft of the drum through a coupling. The above structure causes the space occupied by the existing hoisting motor, especially the axial space, to be too large, affecting the compactness of the electric hoist. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a compact lifting motor for an electric hoist, which has a simpler and more compact structure, occupies less space, has good transmission performance and high strength.

[0005] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0006] A compact lifting motor for an electric hoist comprises a lifting motor and a gear box, wherein the lifting motor comprises a motor barrel and a rotor shaft, wherein an input gear and an output gear which are transmission-connected are arranged in the gear box, wherein the input gear shaft of the input gear and the output gear shaft of the output gear are rotationally connected to the gear box respectively, an input spline is formed at the front end of the rotor shaft, and an output spline is formed at the rear end of the output gear shaft, an end of the rotor shaft extends into the gear box and is transmission-connected to the input gear via the input spline, and the rear end of the output gear shaft extends out of the gear box and is transmission-connected to a reel via the output spline.

[0007] In the above-mentioned compact lifting motor of an electric hoist, an intermediate gear is arranged in the gear box, and the intermediate gear is respectively connected to the input gear and the output gear in a transmission manner, and the intermediate gear shaft of the intermediate gear is rotatably connected to the gear box.

[0008] In the above-mentioned compact lifting motor of an electric hoist, the gear box includes a front shell and a rear shell, and multiple pairs of bearing seats are arranged on the inner sides of the front shell and the rear shell. Multiple pairs of bearings are assembled in the bearing seats, and the two ends of the input gear shaft, the intermediate gear shaft, and the output gear shaft are respectively assembled in corresponding bearings.

[0009] In the above-mentioned compact lifting motor of an electric hoist, the input gear includes an input large gear and an input small gear arranged on the input gear shaft, the intermediate gear includes an intermediate large gear and an intermediate small gear arranged on the intermediate gear shaft, the input large gear meshes with the input spline for transmission, the input small gear meshes with the intermediate large gear for transmission, and the intermediate small gear meshes with the output gear for transmission. Of course, according to actual needs, more intermediate gears can be set to perform more levels of reduction transmission; or, without setting intermediate gears, the input small gear and the output gear are directly meshed for transmission to perform two-stage reduction transmission.

[0010] In the above-mentioned compact lifting motor of an electric hoist, the lifting motor and the gear box are arranged in an "F" shape, and the rotor shaft, input gear shaft, intermediate gear shaft, output gear shaft and the drum shaft of the drum are arranged in parallel.

[0011] In the above-mentioned compact lifting motor of an electric hoist, a front end cover is arranged between the lifting motor and the gear box, and the two ends of the front end cover are fixedly connected to the motor barrel and the gear box respectively.

[0012] In the above-mentioned compact lifting motor of an electric hoist, the front end of the front cover is provided with a front connecting end, and the rear end is provided with a rear connecting end, the front connecting end is fixedly connected to the gear box by a plurality of fasteners, and the rear connecting end is fixedly connected to the motor barrel by a plurality of fasteners. Further, the fasteners are circumferentially distributed bolts.

[0013] In the above-mentioned compact lifting motor of an electric hoist, the front connecting end and the rear connecting end are arranged in parallel, and a plurality of connecting ribs are arranged between the front connecting end and the rear connecting end, and the connecting ribs are connected to the rear side surface of the front connecting end, the front side surface of the rear connecting end, and the outer peripheral surface of the front end cover. Furthermore, an accommodation space for bolt installation is formed between the connecting ribs.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model provides a compact lifting motor for an electric hoist. A coupling is not used. Splines are directly arranged on the rotor shaft and the output gear shaft, and the splines are respectively connected to the input gear and the drum. Compared with the lifting motor of the traditional electric hoist, the lifting motor of the utility model has a simpler and more compact structure, occupies less space, and has good transmission performance and high strength.

[0016] 2. The utility model further improves the connection structure of the lifting motor and the gear box. In order to match the transmission connection structure between the rotor shaft and the input gear, a new front cover connection structure is designed. Compared with the structure of the existing electric hoist, the front cover of the utility model connects the lifting motor and the gear box into a whole, forming an integrated three-in-one lifting mechanism, making the lifting mechanism structure of the electric hoist more compact and with higher structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 It is an axial cross-sectional view of the utility model;

[0019] Figure 3 This is the transmission structure diagram of the utility model;

[0020] Figure 4 It is a three-dimensional diagram of the front end cover of the utility model;

[0021] Figure numerals: 1. lifting motor; 2. gear box; 3. motor barrel; 4. rotor shaft; 5. input gear; 6. output gear; 7. input gear shaft; 8. output gear shaft; 9. input spline; 10. output spline; 11. intermediate gear; 12. intermediate gear shaft; 13. input large gear; 14. input small gear; 15. intermediate large gear; 16. intermediate small gear; 17. front end cover; 18. front connecting end; 19. rear connecting end; 20. fastener; 21. connecting rib. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings. Figure 1-4 :

[0023] A compact lifting motor for an electric hoist comprises a lifting motor 1 and a gear box 2, wherein the lifting motor 1 comprises a motor barrel 3 and a rotor shaft 4, wherein the gear box 2 is provided with an input gear 5 and an output gear 6 which are transmission-connected, wherein an input gear shaft 7 of the input gear 5 and an output gear shaft 8 of the output gear 6 are rotationally connected to the gear box 2 respectively, an input spline 9 is formed at the front end of the rotor shaft 4, and an output spline 10 is formed at the rear end of the output gear shaft 8, an end of the rotor shaft 4 extends into the gear box 2 and is transmission-connected to the input gear 5 through the input spline 9, and a rear end of the output gear shaft 8 extends outside the gear box 2 and is transmission-connected to the reel through the output spline 10.

[0024] Compare with Figure 2 When working, the rotor shaft 4 of the lifting motor 1 rotates, driving the input gear 5 to rotate through the input spline 9. The input gear 5 drives the output gear 6 to rotate after the reduction transmission, and the output gear shaft 8 and the output spline 10 rotate accordingly, and finally drives the drum to rotate to retract and release the wire rope to realize the lifting of heavy objects.

[0025] Compare with Figure 3 The transmission structure of the gearbox 2 of this embodiment adopts a three-stage reduction structure: an intermediate gear 11 is arranged in the gearbox 2, and the intermediate gear 11 is respectively connected to the input gear 5 and the output gear 6, and the intermediate gear shaft 12 of the intermediate gear 11 is rotatably connected to the gearbox 2; the input gear 5 includes an input large gear 13 and an input small gear 14 arranged on the input gear shaft 7, and the intermediate gear 11 includes an intermediate large gear 15 and an intermediate small gear 16 arranged on the intermediate gear shaft 12, the input large gear 13 is meshed with the input spline 9 for transmission, the input small gear 14 is meshed with the intermediate large gear 15 for transmission, and the intermediate small gear 16 is meshed with the output gear 6 for transmission. The transmission process is: the input spline 9 rotates with the rotor shaft 4, and drives the input large gear 13 meshing therewith to rotate, the input large gear 13 drives the input gear shaft 7 and the input pinion 14 to rotate simultaneously, the input pinion 14 drives the intermediate large gear 15 meshing therewith to rotate, the intermediate large gear 15 drives the intermediate gear shaft 12 and the intermediate pinion 16 to rotate simultaneously, the intermediate pinion 16 drives the output gear 6 meshing therewith to rotate, and the output gear 6 drives the output gear shaft 8 and the output spline 10 to rotate simultaneously.

[0026] Furthermore, the gearbox 2 includes a front housing and a rear housing, and multiple pairs of bearing seats are arranged on the inner sides of the front housing and the rear housing. Multiple pairs of bearings are assembled in the bearing seats, and the two ends of the input gear shaft 7, the intermediate gear shaft 12, and the output gear shaft 8 are respectively assembled in the corresponding bearings.

[0027] In this example, the Figure 1The lifting motor and the gear box 2 are arranged in an "F" shape, and the rotor shaft 4, the input gear shaft 7, the intermediate gear shaft 12, the output gear shaft 8 and the drum shaft of the drum are arranged in parallel.

[0028] A front end cover 17 is provided between the hoisting motor 1 and the gear box 2, and the two ends of the front end cover 17 are respectively fixedly connected to the motor barrel 3 and the gear box 2. In this embodiment, the hoisting motor and the gear box 2 are connected as a whole through the front end cover 17, forming an integrated three-in-one hoisting mechanism (hoisting motor, gear box 2 and output structure three-in-one).

[0029] Compare with Figure 4 The front end of the front cover 17 is provided with a front connecting end 18 and the rear end is provided with a rear connecting end 19. The front connecting end 18 is fixedly connected to the gear box 2 through a plurality of fasteners 20, and the rear connecting end 19 is fixedly connected to the motor barrel 3 through a plurality of fasteners 20. Further, the fasteners 20 are circumferentially distributed bolts.

[0030] Preferably, the front connecting end 18 and the rear connecting end 19 are arranged in parallel, and a plurality of connecting ribs 21 are arranged between the front connecting end 18 and the rear connecting end 19, and the connecting ribs 21 are integrally connected with the rear side surface of the front connecting end 18, the front side surface of the rear connecting end 19 and the outer peripheral surface of the front end cover 17. Furthermore, an accommodation space for bolt installation is formed between the connecting ribs 21.

[0031] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A compact lifting motor for an electric hoist, comprising a lifting motor (1) and a gear box (2), wherein the lifting motor (1) comprises a motor barrel (3) and a rotor shaft (4), wherein an input gear (5) and an output gear (6) in transmission connection are arranged in the gear box (2), wherein an input gear shaft (7) of the input gear (5) and an output gear shaft (8) of the output gear (6) are respectively rotatably connected to the gear box (2), and wherein: An input spline (9) is formed at the front end of the rotor shaft (4), and an output spline (10) is formed at the rear end of the output gear shaft (8). The end of the rotor shaft (4) extends into the gear box (2) and is transmission-connected to the input gear (5) via the input spline (9), and the rear end of the output gear shaft (8) extends out of the gear box (2) and is transmission-connected to the reel via the output spline (10).

2. The compact lifting motor of an electric hoist according to claim 1, characterized in that: An intermediate gear (11) is arranged in the gear box (2), and the intermediate gear (11) is respectively transmission-connected to the input gear (5) and the output gear (6), and an intermediate gear shaft (12) of the intermediate gear (11) is rotationally connected to the gear box (2).

3. The compact lifting motor of an electric hoist according to claim 2, characterized in that: The input gear (5) comprises an input large gear (13) and an input small gear (14) arranged on an input gear shaft (7); the intermediate gear (11) comprises an intermediate large gear (15) and an intermediate small gear (16) arranged on an intermediate gear shaft (12); the input large gear (13) meshes with the input spline (9) for transmission, the input small gear (14) meshes with the intermediate large gear (15) for transmission, and the intermediate small gear (16) meshes with the output gear (6) for transmission.

4. The compact lifting motor of an electric hoist according to claim 1, characterized in that: The lifting motor (1) and the gear box (2) are arranged in an "F" shape, and the rotor shaft (4), the input gear shaft (7), the intermediate gear shaft (12), the output gear shaft (8) and the reel shaft of the reel are arranged in parallel.

5. The compact lifting motor of an electric hoist according to claim 1, characterized in that: A front end cover (17) is provided between the lifting motor (1) and the gear box (2), and two ends of the front end cover (17) are fixedly connected to the motor barrel (3) and the gear box (2) respectively.

6. The compact lifting motor of an electric hoist according to claim 5, characterized in that: The front end of the front cover (17) is provided with a front connecting end (18) at the front end and a rear connecting end (19) at the rear end; the front connecting end (18) is fixedly connected to the gear box (2) via a plurality of fasteners (20), and the rear connecting end (19) is fixedly connected to the motor cylinder (3) via a plurality of fasteners (20).

7. The compact lifting motor of an electric hoist according to claim 6, characterized in that: The front connecting end (18) and the rear connecting end (19) are arranged in parallel, and a plurality of connecting ribs (21) are arranged between the front connecting end (18) and the rear connecting end (19), and the connecting ribs (21) are integrally connected with the rear side surface of the front connecting end (18), the front side surface of the rear connecting end (19) and the outer peripheral surface of the front end cover (17).

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