Compact operation motor of electric hoist

Abstract

The utility model belongs to the technical field of electric hoists, and relates to a compact operation motor of an electric hoist, which comprises an operation motor and a gear box, the operation motor comprises a motor cylinder and a rotor shaft, the gear box comprises a box body and a gear set arranged in the box body, the motor cylinder is connected with the box body through a connecting piece, and the rotor shaft is connected with the motor cylinder. The connecting piece comprises a front end cover, a connecting body and a box cover which are integrally cast and formed, the front end cover is fixedly connected with the motor cylinder through a fastener, the box cover is fixedly connected with the box body through a fastener, a spline is formed at the front end part of the rotor shaft, and the end part of the rotor shaft extends into the gear box and is in transmission connection with the gear set through the spline. The compact operation 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 operating 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 components, and easy operation. It is widely used in loading and unloading heavy objects, mechanical welding, installation and movement of mechanical equipment, etc. The operating mechanism of the electric hoist includes a number of running wheels and a running motor that drives the running wheels. The running motor drives the running wheels to rotate, thereby driving the electric hoist to reciprocate.

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

[0004] The utility model aims at the deficiencies of the prior art and provides a compact operating 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 running motor for an electric hoist comprises a running motor and a gear box, wherein the running motor comprises a motor barrel and a rotor shaft, the gear box comprises a box body and a gear set arranged in the box body, the motor barrel is connected to the box body by a connecting piece, the connecting piece comprises a front end cover, a connecting body and a box cover which are integrally cast, the front end cover is fixedly connected to the motor barrel by fasteners, the box cover is fixedly connected to the box body by fasteners, a spline is formed on the front end portion of the rotor shaft, the end of the rotor shaft extends into the gear box and is transmission-connected to the gear set by the spline.

[0007] In the above-mentioned compact running motor of an electric hoist, the fasteners are circumferentially distributed bolts.

[0008] In the above-mentioned compact running motor of an electric hoist, the gear set includes an input gear and an intermediate gear arranged on a first gear shaft, and an output gear arranged on a second gear shaft, the first gear shaft and the second gear shaft are rotatably connected to a gear box, the input gear is meshed with a spline for transmission, the intermediate gear is meshed with an output gear for transmission, and the number of teeth of the intermediate gear is less than that of the input gear and the output gear. According to actual needs, more levels of reduction transmission structure can also be set.

[0009] In the above-mentioned compact running motor of an electric hoist, the input gear is assembled on the first gear shaft through a flat key, the intermediate gear and the first gear shaft are an integrated structure, and the output gear is assembled on the second gear shaft through a flat key. The second gear shaft passes through the gear box and is connected to the travel wheel of the electric hoist.

[0010] In the above-mentioned compact running motor of an electric hoist, a plurality of pairs of bearing seats are arranged in the gear box, a plurality of pairs of bearings are assembled in the bearing seats, and both ends of the first gear shaft and the second gear shaft are respectively assembled in corresponding bearings.

[0011] In the above-mentioned compact running motor of an electric hoist, preferably, the rotor shaft and the second gear shaft are coaxially arranged, and the first gear shaft is arranged parallel to the rotor shaft and the second gear shaft.

[0012] In the above-mentioned compact running motor of an electric hoist, the front end cover and the box cover are arranged in parallel and are respectively located at two ends of the connecting body.

[0013] In the above-mentioned compact running motor of an electric hoist, a plurality of reinforcing ribs are arranged between the front end cover and the box cover, and the reinforcing ribs are connected to the rear side of the front end cover, the front side of the box cover and the outer peripheral surface of the connecting body. Further, an accommodation space for bolt installation is formed between the connecting ribs. Preferably, the reinforcing ribs are arranged perpendicular to the outer peripheral surface of the connecting body.

[0014] In the above-mentioned compact running motor of an electric hoist, a mounting flange is provided at the front end of the box body, and a connecting plate is provided between the mounting flange and the box body. Preferably, the connecting plate is provided in a radial direction.

[0015] In the above-mentioned compact running motor of an electric hoist, the connecting piece is made of HT250 high-strength cast iron.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model provides a compact running motor for an electric hoist, wherein the front end cover of the motor and the cover of the gear box are cast into one piece, forming an integrated running drive mechanism. At the same time, the utility model does not use a coupling, but directly sets a spline on the rotor shaft, which is connected to the gear set in the gear box through the spline. Compared with the running motor of the traditional electric hoist, the running motor of the utility model has a simpler and more compact structure, occupies less space, and has good transmission performance and high strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 It is an axial cross-sectional view of the utility model;

[0020] Figure 3 This is the transmission structure diagram of the utility model;

[0021] Figure 4 It is a three-dimensional diagram of the connector of the utility model;

[0022] Figure numerals: 1. running motor; 2. gear box; 3. motor barrel; 4. rotor shaft; 5. box body; 6. front end cover; 7. connecting body; 8. box cover; 9. fastener; 10. spline; 11. first gear shaft; 12. input gear; 13. intermediate gear; 14. second gear shaft; 15. output gear; 16. strengthening ribs; 17. mounting flange; 18. connecting plate. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings. Figure 1-4 :

[0024] A compact running motor 1 of an electric hoist comprises a running motor 1 and a gear box 2, wherein the running motor 1 comprises a motor barrel 3 and a rotor shaft 4, the gear box 2 comprises a box body 5 and a gear set arranged in the box body 5, the motor barrel 3 is connected to the box body 5 through a connecting piece, the connecting piece comprises an integrally cast front end cover 6, a connecting body 7 and a box cover 8, the front end cover 6 is fixedly connected to the motor barrel 3 through a fastener 9, the box cover 8 is fixedly connected to the box body 5 through the fastener 9, a spline 10 is formed on the front end portion of the rotor shaft 4, the end of the rotor shaft 4 extends into the gear box 2 and is transmission-connected to the gear set through the spline 10.

[0025] Compare with Figure 1 and attached Figure 2 In this embodiment, the running motor 1 and the gear box 2 are connected together through a connecting piece with a specific structure to form an integrated running drive mechanism. When working, the rotor shaft 4 of the running motor 1 rotates, drives the gear set through the spline 10, and outputs to the walking wheel after reduction transmission, driving the electric hoist to run on the track.

[0026] In this embodiment, the fasteners 9 are circumferentially distributed bolts.

[0027] Compare with Figure 3The specific structure of the gear set in this embodiment is: the gear set includes an input gear 12 and an intermediate gear 13 arranged on the first gear shaft 11, and an output gear 15 arranged on the second gear shaft 14, the first gear shaft 11 and the second gear shaft 14 are rotatably connected to the gear box 2, the input gear 12 is meshed with the spline 10 for transmission, the intermediate gear 13 is meshed with the output gear 15 for transmission, and the number of teeth of the intermediate gear 13 is less than that of the input gear 12 and the output gear 15. This embodiment adopts a two-stage reduction transmission structure: the spline 10 rotates with the rotor shaft 4 and drives the input gear 12 meshed with it to rotate, the input gear 12 drives the first gear shaft 11 and the intermediate gear 13 to rotate simultaneously, the intermediate gear 13 drives the output gear 15 meshed with it to rotate, and the output gear 15 drives the second gear shaft 14 to rotate simultaneously to output power.

[0028] Furthermore, the input gear 12 is assembled on the first gear shaft 11 through a flat key, the intermediate gear 13 and the first gear shaft 11 are an integrated structure, and the output gear 15 is assembled on the second gear shaft 14 through a flat key. The second gear shaft 14 passes through the gear box 2 and is connected to the travel wheel of the electric hoist.

[0029] Preferably, the rotor shaft 4 and the second gear shaft 14 are coaxially arranged, and the first gear shaft 11 is arranged parallel to the rotor shaft 4 and the second gear shaft 14 .

[0030] Furthermore, the gear box 2 is provided with a plurality of pairs of bearing seats, and the bearing seats are equipped with a plurality of pairs of bearings, and both ends of the first gear shaft 11 and the second gear shaft 14 are respectively assembled in corresponding bearings.

[0031] Compare with Figure 4 The front end cover 6 and the box cover 8 are arranged in parallel and are respectively located at two ends of the connecting body 7.

[0032] Furthermore, in order to enhance the structural strength of the connector 7, a plurality of reinforcing ribs 16 are provided between the front end cover 6 and the box cover 8, and the reinforcing ribs 16 are integrally connected with the rear side of the front end cover 6, the front side of the box cover 8 and the outer peripheral surface of the connector 7. Furthermore, an accommodation space for bolt installation is formed between the connecting ribs. Preferably, the reinforcing ribs 16 are arranged perpendicular to the outer peripheral surface of the connector 7.

[0033] Furthermore, in order to facilitate the installation of the driving mechanism, a mounting flange 17 is provided at the front end of the housing 5, and a connecting plate 18 is provided between the mounting flange 17 and the housing 5. Preferably, the connecting plate 18 is provided radially.

[0034] Preferably, the connecting piece is made of HT250 high-strength cast iron.

[0035] 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 running motor for an electric hoist, comprising a running motor (1) and a gear box (2), wherein the running motor (1) comprises a motor barrel (3) and a rotor shaft (4), and the gear box (2) comprises a housing (5) and a gear set arranged in the housing (5), characterized in that: The motor barrel (3) is connected to the housing (5) via a connecting piece, and the connecting piece includes a front end cover (6), a connecting body (7) and a housing cover (8) which are integrally cast. The front end cover (6) is fixedly connected to the motor barrel (3) via a fastener (9), and the housing cover (8) is fixedly connected to the housing (5) via a fastener (9). A spline (10) is formed at the front end of the rotor shaft (4), and the end of the rotor shaft (4) extends into the gear box (2) and is transmission-connected to the gear set via the spline (10).

2. The compact running motor of an electric hoist according to claim 1, characterized in that: The gear set comprises an input gear (12) and an intermediate gear (13) arranged on a first gear shaft (11), and an output gear (15) arranged on a second gear shaft (14); the first gear shaft (11) and the second gear shaft (14) are rotatably connected to a gear box (2); the input gear (12) is meshed with a spline (10) for transmission; the intermediate gear (13) is meshed with the output gear (15) for transmission; the number of teeth of the intermediate gear (13) is smaller than that of the input gear (12) and the output gear (15).

3. The compact running motor of an electric hoist according to claim 2, characterized in that: The input gear (12) is assembled on the first gear shaft (11) via a flat key, the intermediate gear (13) and the first gear shaft (11) are an integrated structure, the output gear (15) is assembled on the second gear shaft (14) via a flat key, the second gear shaft (14) passes through the gear box (2) and is drivingly connected to the travel wheel of the electric hoist.

4. The compact running motor of an electric hoist according to claim 2, characterized in that: The rotor shaft (4) and the second gear shaft (14) are coaxially arranged, and the first gear shaft (11) is arranged parallel to the rotor shaft (4) and the second gear shaft (14).

5. The compact running motor of an electric hoist according to claim 1, characterized in that: The front end cover (6) and the box cover (8) are arranged in parallel and are respectively located at two ends of the connecting body (7).

6. The compact running motor of an electric hoist according to claim 5, characterized in that: A plurality of reinforcing ribs (16) are arranged between the front end cover (6) and the box cover (8), and the reinforcing ribs (16) are integrally connected with the rear side of the front end cover (6), the front side of the box cover (8) and the outer peripheral surface of the connecting body (7).

7. The compact running motor of an electric hoist according to claim 5, characterized in that: A mounting flange (17) is provided at the front end of the box body (5), and a connecting plate (18) is provided between the mounting flange (17) and the box body (5).

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