A reducer output shaft protection device

Abstract

The utility model discloses a speed reducer output shaft protection device, including protection cylinder, the both ends fixed connection flange disc of protection cylinder, the both ends in protection cylinder are connected with the pivot through bearing respectively, and the pivot one end projects protection cylinder outside and forms the output end, and the other end is in protection cylinder, and forms the slot of connection with speed reducer output shaft, the bottom between speed reducer output shaft and slot forms and has the buffer gap. The utility model will the external force that speed reducer output shaft received through protection cylinder, flange disc and buffer gap is converted to protection device and speed reducer shell to reduce the damage risk of speed reducer, and sets up multiple oil seal structure, effectively prevented the single oil seal failure of speed reducer output shaft accelerated wear, can also prevent the lubricating oil in speed reducer and leak and pollute the environment.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and in particular to a protection device for the output shaft of a speed reducer. Background Technology

[0002] When an electric motor outputs power, it is usually connected to a load via a speed reducer to achieve high torque output. However, in the harsh working environment of cement mixing and other mixing fields, various types of dust are frequently present. Dust enters the speed reducer through the gap between the output shaft and the speed reducer housing, increasing its wear and reducing its service life. Furthermore, during the mixing process, the impact of the mixing blades on the mixing material, such as stones, will directly transmit the reaction force to the speed reducer's output shaft. This causes the speed reducer's output shaft to bear the entire load, making it prone to deformation and damage. Since speed reducers are relatively expensive, a protective structure is needed to protect the speed reducer's output shaft and prevent it from being damaged prematurely. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model proposes a gearbox output shaft protection device.

[0004] The objective of this utility model is achieved through the following technical solution: A reducer output shaft protection device includes a protective cylinder with connecting flanges fixed at both ends. Inside the protective cylinder, two shafts are connected to each other via bearings. One end of the shaft extends out of the protective cylinder and forms an output end, while the other end is inside the protective cylinder and forms a slot for connection with the reducer output shaft. A buffer gap is formed between the reducer output shaft and the bottom of the slot.

[0005] In a further improvement, the end face of the flange protrudes to form a limiting ring or is recessed to form a limiting groove; the reducer housing and the load housing connected to the flange are provided with a limiting groove that matches the limiting ring or an annular protrusion that corresponds to the limiting groove.

[0006] In a further improvement, an annular protrusion is formed on the reducer housing, and a limiting groove that mates with the annular protrusion is formed on the connecting flange that is connected to the reducer housing; a protective cavity is also formed in the middle of the mating end face of the reducer housing.

[0007] In a further improvement, oil seals are installed on the outer side of each bearing, and an oil reservoir is formed between the oil seal and the bearing.

[0008] In a further improvement, a first connecting key is formed inside the slot to connect with the output shaft of the reducer, and a second connecting key is formed at the output end to connect with the load.

[0009] A further improvement is that the bearing is a tapered roller bearing.

[0010] In a further improvement, the connecting flanges at both ends of the protective cylinder are connected to the reducer housing and the load respectively by bolts.

[0011] In a further improvement, the oil storage chamber is connected to an oil outlet, and a plug is fixed inside the oil outlet.

[0012] As a further improvement, the outer side of the protective cylinder is fixed with several reinforcing ribs along the circumferential direction.

[0013] As a further improvement, a retaining ring for axial positioning is fixed on the rotating shaft, and the flange and the reducer housing are sealed with adhesive.

[0014] The beneficial effects of this utility model are as follows: 1. This utility model transfers the external force on the output shaft of the reducer to the protective device and the reducer housing through the protective cylinder, flange and buffer gap, thereby reducing the risk of reducer damage.

[0015] 2. The multi-oil seal structure effectively prevents accelerated wear of the reducer output shaft caused by the failure of a single oil seal.

[0016] 3. A radial limiting structure is set for the flange, reducer housing, and load housing to facilitate further bearing of radial loads and make docking and positioning more convenient.

[0017] 4. A protective chamber and an oil reservoir are provided to effectively prevent the lubricating oil of the reducer from leaking out and polluting the environment. Attached Figure Description

[0018] The present invention will be further described with reference to the accompanying drawings, but the content of the drawings does not constitute any limitation on the present invention.

[0019] Figure 1 A three-dimensional cross-sectional view of the output shaft protection device for the speed reducer; Figure 2 A cross-sectional schematic diagram of the connection between the reducer output shaft protection device and the reducer; Figure 3 This is a three-dimensional structural diagram showing the connection between the reducer output shaft protection device and the reducer and motor.

[0020] The components include: protective cylinder 1, reinforcing rib 101, flange 2, limiting protrusion ring 201, limiting groove 202, bearing 3, rotating shaft 4, output end 401, second connecting key 402, reducer output shaft 5, slot 6, buffer gap 601, first connecting key 602, oil seal 7, oil storage chamber 8, oil outlet 801, plug 802, reducer housing 9, annular protrusion 901, protective cavity 902, and retaining ring 10. Detailed Implementation

[0021] To make the purpose, technical solution and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and examples.

[0022] Example 1 like Figures 1-3 The illustrated reducer output shaft protection device includes a protective cylinder 1. Flanges 2, connecting the load housing and the reducer housing 9, are fixed to both ends of the protective cylinder 1. The flanges 2 are bolted to the load housing and the reducer housing 9. Inside the protective cylinder 1, two rotating shafts 4 are connected to each end via tapered roller bearings. One end of the rotating shaft 4 extends out of the protective cylinder 1 to form an output end 401 connected to the load, while the other end is inside the protective cylinder 1, forming a slot 6 for connection to the reducer output shaft 5. This fixed connection between the protective cylinder 1 and the load housing and reducer housing 9 ensures that the radial load received by the load is primarily borne by the load housing and the reducer housing, thereby reducing the radial load force transmitted to the reducer output shaft 5. Furthermore, to reduce the circumferential load force, a buffer gap 601 is formed between the reducer output shaft 5 and the bottom of the slot 6. This buffer gap 601 creates a buffer space, ensuring that the radial load is also primarily borne by the protective device and the reducer housing, further reducing the load force on the reducer output shaft 5. This significantly reduces the total load on the output shaft 5 of the reducer, thereby extending its service life.

[0023] Meanwhile, the protective cylinder 1 can effectively prevent mud, sand, dust and other contaminants from entering the reducer, thereby reducing the wear of mud, sand and dust on the reducer output shaft 5.

[0024] To further prevent dirt and sand from entering, oil seals 7 are installed on the outer side of bearings 3, forming an oil reservoir 8 between the oil seals 7 and bearings 3. This oil seal provides a seal, preventing dust and dirt from entering the reducer output shaft protection device through the gaps. Combined with the reducer's own oil seal, this triple oil seal dustproof system effectively avoids the problem of dust and other contaminants easily entering the reducer and causing wear if a single oil seal fails.

[0025] The slot 6 has a first connecting key 602 that connects to the output shaft 5 of the reducer, and the output end 401 has a second connecting key 402 that connects to the load, thereby realizing the transmission connection.

[0026] To further enhance the stability of the connection, a limiting ring 201 is formed by a protrusion on the end face of one flange 2, and a limiting groove 202 is formed by a recess in the other flange 2; an annular protrusion 901 is formed on the reducer housing 9 to which the flange 2 is mated, which cooperates with the limiting groove 202; a limiting groove is formed on the housing of the load to cooperate with the limiting ring 201.

[0027] This interlocking structure further achieves radial constraint, reducing the radial load on the reducer output shaft 5.

[0028] Several reinforcing ribs 101 are fixed circumferentially on the outer side of the protective cylinder 1 to strengthen the structure.

[0029] A retaining ring 10 for axial limiting is fixed on the rotating shaft 4.

[0030] To prevent lubricating oil from leaking out of the reducer due to a malfunction, the flange and reducer housing are sealed with adhesive, and a protective cavity 902 is formed in the middle of the mating end face of the reducer housing 9. In this way, if lubricating oil leaks from the reducer, it will enter the protective cavity and be sealed between the reducer housing and the reducer output shaft protection device. Furthermore, the two oil storage chambers 8 form a secondary and tertiary oil storage structure respectively to further prevent lubricating oil leakage and environmental pollution.

[0031] When the agitator is upright, the oil seal opening faces the reducer; when the agitator is horizontal, the oil seal opening faces the load end.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the essence and scope of the technical solution of this utility model.

Claims

1. A reducer output shaft protection device, comprising a protective cylinder (1), wherein connecting flanges (2) are respectively fixed at both ends of the protective cylinder (1), characterized in that, The protective cylinder (1) has a rotating shaft (4) connected to both ends of the cylinder by bearings (3). One end of the rotating shaft (4) extends out of the protective cylinder (1) and forms an output end (401), while the other end is inside the protective cylinder (1) and forms a slot (6) for connection with the output shaft (5) of the reducer. A buffer gap (601) is formed between the output shaft (5) of the reducer and the bottom of the slot (6).

2. The reducer output shaft protection device as described in claim 1, characterized in that, The end face of the flange (2) has a protrusion forming a limiting protrusion ring (201) or a concave groove forming a limiting groove (202); the reducer housing (9) and the load housing connected to the flange (2) have a limiting groove that matches the limiting protrusion ring (201) or an annular protrusion (901) that corresponds to the limiting groove (202).

3. The reducer output shaft protection device as described in claim 2, characterized in that, The reducer housing (9) has an annular protrusion (901) formed on it, and the connecting flange (2) that is connected to the reducer housing (9) has a limiting groove (202) that matches the annular protrusion (901) formed on it; a protective cavity (902) is also formed in the middle of the mating end face of the reducer housing (9).

4. The reducer output shaft protection device as described in claim 1, characterized in that, Oil seals (7) are installed on the outside of each bearing (3), and an oil storage cavity (8) is formed between the oil seal (7) and the bearing (3).

5. The reducer output shaft protection device as described in claim 1, characterized in that, The slot (6) has a first connecting key (602) that connects to the output shaft (5) of the reducer, and the output end (401) has a second connecting key (402) that connects to the load.

6. The reducer output shaft protection device as described in claim 1, characterized in that, The bearing (3) is a tapered roller bearing.

7. The reducer output shaft protection device as described in claim 1, characterized in that, The connecting flanges (2) at both ends of the protective cylinder (1) are connected to the reducer housing (9) and the load respectively by bolts.

8. The reducer output shaft protection device as described in claim 4, characterized in that, The oil storage chamber (8) is connected to an oil outlet (801), and a plug (802) is fixed inside the oil outlet (801).

9. The reducer output shaft protection device as described in claim 1, characterized in that, The outer side of the protective cylinder (1) is fixed with several reinforcing ribs (101) along the circumferential direction.

10. The reducer output shaft protection device as described in claim 1, characterized in that, A retaining ring (10) for axial positioning is fixed on the rotating shaft (4); the flange (2) and the reducer housing (9) are sealed with glue at the joint.

Images