Speed reducer unit, driving device and cleaning equipment

Abstract

The utility model provides a speed reducer unit, a driving device and cleaning equipment. The speed reducer unit comprises a first speed reducer, a second speed reducer and a third speed reducer, the second speed reducer is provided with a second input shaft and a second output shaft; the transmission part comprises a first transmission wheel and a second transmission wheel in transmission connection with the first transmission wheel, and the first transmission wheel is connected to the first output shaft; the overload protection part is connected to the periphery of the second input shaft, the second transmission wheel is rotatably arranged on the periphery of the overload protection part, the overload protection part is provided with a first friction surface, the second transmission wheel is provided with a second friction surface, and the first friction surface and the second friction surface are matched to generate friction force; the speed reducer unit has a power output state in which the first friction surface and the second friction surface are relatively static to generate friction force and an overload protection state in which the first friction surface and the second friction surface rotate relatively. According to the technical scheme, the problem that in the prior art, when a speed reducer unit is overloaded, clamping stagnation and damage are prone to occurring is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, in particular to a reducer unit, a driving device and a cleaning device. Background Art

[0002] In the prior art, cleaning equipment is generally used to clean the motor end cover, and the material frame containing the motor end cover is installed on the guide rail. The chain is wound around the sprocket, and the motor drives the sprocket to rotate through the reduction unit. The chain can be used to drive the material frame to move on the guide rail.

[0003] The reduction gear unit includes a driving reduction gear and a load reduction gear. The motor drives the driving reduction gear to operate. The driving reduction gear drives the load reduction gear to operate through a transmission chain. The load reduction gear then drives the chain to rotate through a sprocket, and the chain drives the material frame to move on the guide rail. Among them, the chain and / or sprocket used to drive the material frame to move is prone to jamming and other faults. It is difficult for the staff to stop the motor in time. The motor continues to drive the reduction gear unit to operate, and the load reduction gear continues to output power, which will cause the load reduction gear to jam and be damaged, and even cause damage to the entire reduction gear unit. Utility Model Content

[0004] In view of this, the utility model proposes a reduction gear unit, a driving device and a cleaning device, so as to solve the problem that the reduction gear unit in the prior art is prone to jamming and damage when overloaded.

[0005] The utility model provides a reduction gear unit, comprising: a first reduction gear, having a first input shaft and a first output shaft; a second reduction gear, having a second input shaft and a second output shaft; a transmission part, comprising a first transmission wheel and a second transmission wheel transmission-connected with the first transmission wheel, the first transmission wheel being connected to the first output shaft; an overload protection part, connected to the outer periphery of the second input shaft, the second transmission wheel being rotatably arranged on the outer periphery of the overload protection part, the overload protection part having a first friction surface, the second transmission wheel having a second friction surface, the first friction surface cooperates with the second friction surface to generate friction force, the reduction gear unit has a power output state in which the first friction surface and the second friction surface are relatively stationary and generate friction force, and an overload protection state in which the first friction surface and the second friction surface are relatively rotated.

[0006] In this way, no power can be input into the second reducer to cut off the power output of the reducer unit, thereby avoiding jamming and damage to the second reducer, thereby protecting the reducer unit and the motor.

[0007] In a preferred embodiment, the overload protection part includes: a transmission member connected to the outer periphery of the second input shaft, the transmission member includes a first sleeve and a second sleeve that are connected and have successively decreasing outer diameters, the second transmission wheel is located at the outer periphery of the second sleeve and has a clearance fit with the second sleeve; a friction member is located between the first sleeve and the second transmission wheel; a pre-tightening member is connected to the first sleeve or the second sleeve, at least a part of the pre-tightening member is located on the side of the second transmission wheel away from the friction member, and the pre-tightening member is used to press the second transmission wheel and the friction member against the first sleeve.

[0008] In this way, when the second reducer drives the material frame to operate normally, the second transmission wheel can drive the first sleeve to rotate through the friction component to drive the second input shaft to rotate, thereby realizing the power output of the second reducer; when the chain and / or sprocket used to drive the material frame to move has a jam or other fault, the second transmission wheel can rotate relative to the second sleeve, thereby realizing no power input to the second reducer, so as to cut off the power output of the reducer group when overloaded, thereby avoiding jamming and damage to the second reducer.

[0009] In a preferred embodiment, the pre-tightening component is connected to the second sleeve, and the pre-tightening component is located on a side of the second transmission wheel away from the friction component.

[0010] In this way, friction can be generated between the second transmission wheel and the friction member and between the first sleeve and the friction member, and the second transmission wheel and the friction member can be prevented from falling off the second sleeve.

[0011] In a preferred embodiment, the pre-tightening component is located on the outer circumference of the second sleeve and is threadedly connected to the second sleeve.

[0012] In this way, installation of the prestressing member is facilitated.

[0013] In a preferred embodiment, the overload protection unit further includes an elastic member located at the outer periphery of the second sleeve, and the elastic member is located between the preload component and the second transmission wheel.

[0014] In this way, a preload force can be provided to ensure that the second transmission wheel and the friction member are in abutment with each other, and that the first sleeve and the friction member are in abutment with each other.

[0015] In a preferred embodiment, the overload protection unit includes two elastic members, which are disc springs, and the two disc springs are arranged face to face.

[0016] In this way, a greater preload can be provided.

[0017] In a preferred embodiment, the first transmission wheel and the second transmission wheel are connected by a transmission chain.

[0018] In this way, the power transmission between the first driving wheel and the second driving wheel can be achieved.

[0019] In a preferred embodiment, the transmission member is in interference fit with the second input shaft. A first groove is provided on the second input shaft, and a second groove is provided on the transmission member. The speed reduction unit further includes a limiting member, and both the first groove and the second groove are in limiting cooperation with the limiting member.

[0020] In this way, the connection between the transmission member and the second input shaft can be achieved, so that the transmission member and the second input shaft can rotate synchronously.

[0021] According to another aspect of the present invention, a driving device is provided, which includes a motor and the above-mentioned speed reduction unit, and the power output shaft of the motor is drivingly connected to the first input shaft.

[0022] According to another aspect of the present invention, a cleaning device is provided, which includes the above-mentioned driving device and a conveying device, and the second output shaft is connected to the input shaft of the conveying device.

[0023] As can be seen from the above solution, when a driving force is input to the first input shaft, the first input shaft can drive the second driving wheel to rotate successively through the first output shaft and the first driving wheel. The second friction surface of the second driving wheel cooperates with the first friction surface of the overload protection part to generate a frictional force, so that the second driving wheel drives the overload protection part to rotate, and then the overload protection part drives the second input shaft to rotate, so that the second output shaft outputs a rotational torque to drive the chain for conveying the material frame to rotate, thereby enabling the speed reduction unit to achieve power output; when a failure such as jamming occurs in the chain and / or sprocket for driving the material frame to move, the overload protection part, the second input shaft and the second output shaft stop rotating under the action of the failure. At this time, even if the motor does not stop in time, the motor drives the second driving wheel to rotate successively through the first input shaft, the first output shaft and the first driving wheel. Since the first friction surface and the second friction surface can rotate relative to each other, the first driving wheel can drive the second driving wheel to rotate on the overload protection part. In this way, it is possible to achieve no power input to the second speed reducer to cut off the power output of the speed reduction unit, thereby avoiding jamming and damage of the second speed reducer, and further protecting the speed reduction unit and the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following will make the above and other features and advantages of the present invention clearer to those of ordinary skill in the art by referring to the preferred embodiments of the present invention described in detail with reference to the drawings, in which:

[0025] Figure 1 is a schematic structural diagram of a driving device according to an exemplary embodiment of the present invention;

[0026] Figure 2 is Figure 1Schematic diagram of the speed reduction unit of the driving device;

[0027] Figure 3 For Figure 2 Schematic exploded view of the second speed reducer and the overload protection part of the speed reduction unit.

[0028] In the above-mentioned drawings, the following reference numerals are used:

[0029] 10. First speed reducer;

[0030] 11. First input shaft;

[0031] 12. First output shaft;

[0032] 20. Second speed reducer;

[0033] 21. Second input shaft;

[0034] 22. Second output shaft;

[0035] 31. First transmission wheel;

[0036] 32. Second transmission wheel;

[0037] 33. Transmission chain;

[0038] 51. First friction surface;

[0039] 52. Second friction surface;

[0040] 53. Transmission member;

[0041] 531. First sleeve;

[0042] 532. Second sleeve;

[0043] 54. Friction member;

[0044] 55. Preloading member;

[0045] 56. Elastic member;

[0046] 57. First groove;

[0047] 58. Second groove;

[0048] 70. Motor. Detailed implementation manners

[0049] To make the objectives, technical solutions and advantages of the present utility model clearer, the following examples are given to further elaborate on the present utility model in detail.

[0050] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in combination with the embodiments.

[0051] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0052] In the present utility model, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are usually in reference to the direction shown in the drawings, or in reference to the component itself in the vertical, perpendicular or gravitational direction; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation terms do not limit the present utility model.

[0053] As Figures 1 to 3 shown, an embodiment of the present utility model provides a speed reduction unit. The speed reduction unit includes a first speed reducer 10, a second speed reducer 20, a transmission part and an overload protection part. Among them, the first speed reducer 10 has a first input shaft 11 and a first output shaft 12; the second speed reducer 20 has a second input shaft 21 and a second output shaft 22; the transmission part includes a first transmission wheel 31 and a second transmission wheel 32 that is in transmission connection with the first transmission wheel 31, and the first transmission wheel 31 is connected to the first output shaft 12; the overload protection part is connected to the outer periphery of the second input shaft 21, the second transmission wheel 32 is rotatably arranged on the outer periphery of the overload protection part, the overload protection part has a first friction surface 51, the second transmission wheel 32 has a second friction surface 52, the first friction surface 51 and the second friction surface 52 cooperate to generate frictional force, and the speed reduction unit has a power output state in which the first friction surface 51 and the second friction surface 52 are relatively stationary and generate frictional force, and an overload protection state in which the first friction surface 51 and the second friction surface 52 rotate relative to each other.

[0054] In the above technical solution, a driving force is input to the first input shaft 11. The first input shaft 11 can drive the second driving wheel 32 to rotate in sequence through the first output shaft 12 and the first driving wheel 31. The second friction surface 52 of the second driving wheel 32 cooperates with the first friction surface 51 of the overload protection part to generate frictional force, so that the second driving wheel 32 drives the overload protection part to rotate. Then, the overload protection part drives the second input shaft 21 to rotate, so that the second output shaft 22 outputs a rotational torque to drive the chain for conveying the material frame to rotate, thereby enabling the speed reduction unit to achieve power output. When a fault such as jamming occurs in the chain and / or sprocket for driving the material frame to move, the overload protection part, the second input shaft 21 and the second output shaft 22 stop rotating under the action of the fault. At this time, even if the motor does not stop in time, the motor drives the second driving wheel 32 to rotate in sequence through the first input shaft 11, the first output shaft 12 and the first driving wheel 31. Since the first friction surface 51 and the second friction surface 52 can rotate relative to each other, the first driving wheel 31 can drive the second driving wheel 32 to rotate on the overload protection part. In this way, no power is input to the second speed reducer 20, the power output of the speed reduction unit can be cut off, the second speed reducer 20 can be prevented from being jammed and damaged, and the speed reduction unit and the motor can be protected accordingly.

[0055] Furthermore, through the above settings, the service life of the speed reduction unit can be extended, the labor intensity of workers can be reduced, the maintenance cost can be saved, and the equipment safety can be improved.

[0056] It should be noted that in the embodiments of the present invention, when a fault such as jamming occurs in the chain and / or sprocket for driving the material frame to move, the load force received by the second output shaft 22 will increase, resulting in an increase in the load force on the second input shaft 21. When the static frictional force generated between the first friction surface 51 and the second friction surface 52 is difficult to overcome the load force received by the second input shaft 21, the second friction surface 52 rotates relative to the first friction surface 51, the second driving wheel 32 rotates relative to the overload protection part, and the second input shaft 21 stops rotating. When the second speed reducer 20 drives the material frame to operate normally, the second driving wheel 32 drives the overload protection part to rotate through the static frictional force between the first friction surface 51 and the second friction surface 52, so as to drive the second input shaft 21 to rotate.

[0057] Such as Figure 1 and Figure 3As shown, in the embodiment of the utility model, the overload protection part includes: a transmission member 53, connected to the outer periphery of the second input shaft 21, the transmission member 53 includes a first sleeve 531 and a second sleeve 532 that are connected and have outer diameters that decrease successively, the second transmission wheel 32 is located at the outer periphery of the second sleeve 532 and has a clearance fit with the second sleeve 532; a friction member 54, located between the first sleeve 531 and the second transmission wheel 32; a pre-tightening member 55, connected to the first sleeve 531 or the second sleeve 532, at least part of the pre-tightening member 55 is located on the side of the second transmission wheel 32 away from the friction member 54, and the pre-tightening member 55 is used to press the second transmission wheel 32 and the friction member 54 against the first sleeve 531.

[0058] Through the above arrangement, friction can be generated between the second transmission wheel 32 and the friction member 54 and between the first sleeve 531 and the friction member 54. In this way, when the second reducer 20 drives the material frame to operate normally, the second transmission wheel 32 can drive the first sleeve 531 to rotate through the friction member 54, so as to drive the second input shaft 21 to rotate, thereby realizing the power output of the second reducer 20; when the chain and / or sprocket used to drive the material frame to move has a jam or other fault, the second transmission wheel 32 can rotate relative to the second sleeve 532, thereby realizing no power input to the second reducer 20, so as to cut off the power output of the reducer group when overloaded, thereby avoiding jamming and damage to the second reducer 20.

[0059] It should be noted that, in the embodiment of the present invention, the side of the friction member 54 facing the second transmission wheel 32 forms the first friction surface 51 , and the side of the second transmission wheel 32 facing the friction member 54 forms the second friction surface 52 .

[0060] It should be noted that, in the embodiment of the present invention, the friction coefficient of the friction member 54 can be obtained through multiple tests, as long as the chain and / or sprocket used to drive the material frame to move does not have any faults such as jamming (during normal operation), the second transmission wheel 32 can drive the second input shaft 21 to rotate through the transmission member 53; when the chain and / or sprocket used to drive the material frame to move has any faults such as jamming (when overloaded), the second transmission wheel 32 can rotate relative to the transmission member 53.

[0061] Preferably, in the embodiment of the present invention, the friction member 54 is a friction plate, and the friction plate is clearance-matched with the second sleeve 532 .

[0062] like Figure 3As shown in the figure, in the embodiment of the present utility model, the pre-tightening member 55 is connected to the second sleeve 532, and the pre-tightening member 55 is located on the side of the second transmission wheel 32 away from the friction member 54. In this way, the pre-tightening member 55 can press the second transmission wheel 32 and the friction member 54 against the first sleeve 531, so that frictional forces can be generated between the second transmission wheel 32 and the friction member 54 and between the first sleeve 531 and the friction member 54, and the second transmission wheel 32 and the friction member 54 can be prevented from falling off the second sleeve 532.

[0063] As Figure 3 shown in the figure, in the embodiment of the present utility model, the pre-tightening member 55 is located on the outer periphery of the second sleeve 532 and is threadedly connected to the second sleeve 532. In this way, it is convenient to install the pre-tightening member 55, and the pressure between the second transmission wheel 32 and the friction member 54 and between the first sleeve 531 and the friction member 54 can also be adjusted, so as to adjust the frictional forces between the second transmission wheel 32 and the friction member 54 and between the first sleeve 531 and the friction member 54.

[0064] Preferably, in the embodiment of the present utility model, the pre-tightening member 55 is a nut, and the outer periphery of the second sleeve 532 is provided with an external thread that cooperates with the nut.

[0065] As Figure 3 shown in the figure, in the embodiment of the present utility model, the overload protection portion further includes an elastic member 56 located on the outer periphery of the second sleeve 532, and the elastic member 56 is located between the pre-tightening member 55 and the second transmission wheel 32. In this way, the elastic member 56 can provide a pre-tightening force to ensure that the second transmission wheel 32 abuts against the friction member 54 and to ensure that the first sleeve 531 abuts against the friction member 54.

[0066] As Figure 3 shown in the figure, in the embodiment of the present utility model, the overload protection portion includes two elastic members 56, the elastic members 56 are disc springs, and the two disc springs are arranged face to face. In this way, a greater pre-tightening force can be provided.

[0067] As Figure 1 and Figure 2 shown in the figure, in the embodiment of the present utility model, the first transmission wheel 31 and the second transmission wheel 32 are drivingly connected by a transmission chain 33. In this way, power transmission between the first transmission wheel 31 and the second transmission wheel 32 can be achieved.

[0068] Preferably, in the embodiment of the present utility model, both the first transmission wheel 31 and the second transmission wheel 32 are sprockets.

[0069] As Figure 1 and Figure 3As shown in the figure, in the embodiment of the present utility model, the transmission member 53 is in interference fit with the second input shaft 21. A first groove 57 is provided on the second input shaft 21, and a second groove 58 is provided on the transmission member 53. The speed reduction unit further includes a limiting member, and both the first groove 57 and the second groove 58 are in limiting cooperation with the limiting member. In this way, the connection between the transmission member 53 and the second input shaft 21 can be realized, so that the transmission member 53 and the second input shaft 21 can rotate synchronously.

[0070] Preferably, in the embodiment of the present utility model, the limiting member is a flat key.

[0071] Preferably, as Figure 3 shown, in the embodiment of the present utility model, the second groove 58 penetrates from one end of the transmission member 53 to the other end of the transmission member 53 along the axis of the first sleeve 531, and the first groove 57 penetrates to the end face of the second input shaft 21 along the axis of the second input shaft 21. In this way, it is convenient to install the flat key.

[0072] As Figure 1 shown, the embodiment of the present utility model provides a driving device, which includes a motor 70 and the above-mentioned speed reduction unit. The power output shaft of the motor 70 is drivingly connected to the first input shaft 11.

[0073] Preferably, in the embodiment of the present utility model, the motor 70 is a three-phase asynchronous motor.

[0074] The above driving device has all the advantages of the above-mentioned speed reduction unit, which will not be elaborated here.

[0075] The embodiment of the present utility model provides a cleaning device, which includes the above-mentioned driving device and a conveying device. The second output shaft 22 is connected to the input shaft of the conveying device.

[0076] It should be noted that in the embodiment of the present utility model, the cleaning device is mainly used for cleaning the motor end cover.

[0077] The above cleaning device has all the advantages of the above-mentioned driving device, which will not be elaborated here.

[0078] As can be seen from the above solution, for the speed reducer unit proposed according to the present utility model, when a driving force is input to the first input shaft, the first input shaft can drive the second transmission wheel to rotate successively through the first output shaft and the first transmission wheel. The second friction surface of the second transmission wheel cooperates with the first friction surface of the overload protection part to generate frictional force, so that the second transmission wheel drives the overload protection part to rotate. Then, the overload protection part drives the second input shaft to rotate, so that the second output shaft outputs a rotational torque to drive the chain for conveying the material frame to rotate, thereby enabling the speed reducer unit to achieve power output. When a fault such as jamming occurs in the chain and / or sprocket for driving the material frame to move, the overload protection part, the second input shaft and the second output shaft stop rotating under the action of the fault. At this time, even if the motor does not stop in time, the motor drives the second transmission wheel to rotate successively through the first input shaft, the first output shaft and the first transmission wheel. Since the first friction surface and the second friction surface can rotate relative to each other, the first transmission wheel can drive the second transmission wheel to rotate on the overload protection part. In this way, it is possible to achieve no power input to the second speed reducer to cut off the power output of the speed reducer unit, thereby avoiding jamming and damage of the second speed reducer, and further protecting the speed reducer unit and the motor.

[0079] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A speed reduction unit, characterized in that, Comprising: A first speed reducer (10) having a first input shaft (11) and a first output shaft (12); A second speed reducer (20) having a second input shaft (21) and a second output shaft (22); A transmission part including a first transmission wheel (31) and a second transmission wheel (32) drivingly connected to the first transmission wheel (31), the first transmission wheel (31) being connected to the first output shaft (12); An overload protection part connected to the outer periphery of the second input shaft (21), the second transmission wheel (32) being rotatably provided on the outer periphery of the overload protection part, the overload protection part having a first friction surface (51), the second transmission wheel (32) having a second friction surface (52), the first friction surface (51) and the second friction surface (52) cooperating to generate a frictional force, the speed reducer unit having a power output state in which the first friction surface (51) and the second friction surface (52) are relatively stationary and generate a frictional force, and an overload protection state in which the first friction surface (51) and the second friction surface (52) rotate relative to each other.

2. The speed reducer unit according to claim 1, wherein The overload protection part includes: A transmission member (53) connected to the outer periphery of the second input shaft (21), the transmission member (53) including a first sleeve (531) and a second sleeve (532) connected to each other and having sequentially decreasing outer diameters, the second transmission wheel (32) being located on the outer periphery of the second sleeve (532) and having a clearance fit with the second sleeve (532); A friction member (54) located between the first sleeve (531) and the second transmission wheel (32); A pre-tightening member (55) connected to the first sleeve (531) or the second sleeve (532), at least a part of the pre-tightening member (55) being located on a side of the second transmission wheel (32) facing away from the friction member (54), the pre-tightening member (55) being used to press the second transmission wheel (32) and the friction member (54) against the first sleeve (531).

3. The speed reducer unit according to claim 2, characterized in that, The pre-tightening member (55) is connected to the second sleeve (532), and the pre-tightening member (55) is located on a side of the second transmission wheel (32) facing away from the friction member (54).

4. The speed reducer unit according to claim 3, characterized in that, The pre-tightening member (55) is located on the outer periphery of the second sleeve (532) and is threadedly connected to the second sleeve (532).

5. The speed reducer unit according to claim 2, wherein, The overload protection part further includes an elastic member (56) located on the outer periphery of the second sleeve (532), the elastic member (56) being located between the pre-tightening member (55) and the second transmission wheel (32).

6. The speed reducer unit according to claim 5, characterized in that, The overload protection part includes two of the elastic members (56), the elastic members (56) being disc springs, and the two disc springs being arranged face to face.

7. The speed reducer unit according to any one of claims 2 to 6, characterized in that The first transmission wheel (31) and the second transmission wheel (32) are drivingly connected by a transmission chain (33).

8. The speed reducer unit according to any one of claims 2 to 6, characterized in that, The transmission member (53) is in interference fit with the second input shaft (21). A first groove (57) is provided on the second input shaft (21), and a second groove (58) is provided on the transmission member (53). The speed reduction unit further includes a limiting member, and both the first groove (57) and the second groove (58) are in limiting cooperation with the limiting member.

9. A driving device, characterized in that, It includes a motor (70) and the speed reduction unit according to any one of claims 1 to 8, and a power output shaft of the motor (70) is drivingly connected to the first input shaft (11).

10. A cleaning device, characterized in that, It includes the driving device according to claim 9 and a conveying device, and the second output shaft (22) is connected to an input shaft of the conveying device.

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