Commutator cleaning device for a direct current motor, finishing machine, machining system and cleaning method

Abstract

The present application relates to a kind of DC motor commutator cleaning device, finisher, processing system and cleaning method, comprising: the air pipe and flow sleeve of cooperation use;Air pipe, for the flow of high pressure airflow;Flow sleeve, it is equipped in the air outlet end of air pipe and has hollow cavity with air pipe communication;At least a part of DC motor commutator is adapted to extend into the hollow cavity of flow sleeve;And the inner cavity wall of hollow cavity and the outer wall of DC motor commutator adapted to extend into the hollow cavity form radial gap, to make high pressure airflow be sprayed to the outer wall of DC motor commutator through radial gap.This application not only can effectively guarantee the clearance of slot and the gap of the surface of DC motor commutator, and the cleaning effect of foreign matter in the gap, and in this process, compressed air is effectively utilized to clean foreign matter, so the utilization rate of energy for overall cleaning process can be improved to reduce the energy consumption in overall cleaning process.

Description

DC motor commutator cleaning device, precision lathe, machining system and cleaning method Technical Field

[0001] This invention relates to the field of motor processing technology, and more specifically, to a DC motor commutator cleaning device, a precision lathe, a processing system, and a cleaning method. Background Technology

[0002] In order to reduce motor operating noise and extend carbon brush life during the manufacturing process of DC brushed motors, the commutator surface needs to be precision machined. A large amount of copper shavings are generated during the machining process. Most of the copper shavings are sucked away during precision machining, but a small amount of copper shavings remain in the commutator's pole slots. The copper shavings left in the slots may move due to centrifugal force or other forces during motor operation, which may cause short circuits between poles. Short circuits between poles have a certain impact on motor performance.

[0003] Currently, the commonly used processes in the industry are to use a brush to remove the commutator after precision turning, and to use compressed air for conventional purging.

[0004] Among them, the brush cleaning method is difficult to clean completely due to the influence of the thickness and hardness of the brush bristles, and the copper shavings left in the brush bristles also cause secondary pollution; while the conventional compressed air blowing method is difficult to remove the copper shavings (hereinafter referred to as foreign objects) in the commutator slot, and can only blow the foreign objects on the surface of the commutator, while requiring a large amount of compressed air, which wastes a lot of energy. Summary of the Invention

[0005] The first objective of this invention is to provide a DC motor commutator cleaning device to solve the technical problem of increasing the diversity of washing modes.

[0006] A second objective of this invention is to provide a precision washing machine to solve the technical problem of increasing the diversity of washing modes.

[0007] A third objective of this invention is to provide a DC motor commutator processing system to solve the technical problem of improving the diversity of washing modes.

[0008] The fourth objective of this invention is to provide a method for cleaning a DC motor commutator to address the technical problem of increasing the diversity of washing modes.

[0009] The DC motor commutator cleaning device of the present invention is implemented as follows:

[0010] A DC motor commutator cleaning device, comprising:

[0011] The air duct is used to circulate high-pressure airflow.

[0012] A flow guide sleeve, disposed at the outlet end of an air guide pipe and having a hollow cavity communicating with the air guide pipe; at least a portion of a DC motor commutator is adapted to extend into the hollow cavity of the flow guide sleeve; and

[0013] A radial gap is formed between the inner wall of the hollow cavity and the outer wall of the DC motor commutator adapted to extend into the hollow cavity, so that the high-pressure airflow is sprayed onto the outer wall of the DC motor commutator through the radial gap.

[0014] In an optional embodiment of the present invention, the radial gap between the inner wall of the hollow cavity and the outer wall of the DC motor commutator adapted to extend into the hollow cavity is 0.02 to 6.0 mm.

[0015] In an optional embodiment of the present invention, the radial gap formed between the inner wall of the hollow cavity and the outer wall of the DC motor commutator adapted to extend into the hollow cavity is 0.1 to 2.0 mm.

[0016] In an optional embodiment of the present invention, a high-pressure zone and a clean zone are formed in the hollow cavity by a high-pressure airflow; wherein

[0017] The high-pressure zone is formed at the location where the guide sleeve connects to the air guide pipe;

[0018] The clean zone is formed at the junction of the guide sleeve and the DC motor commutator; and

[0019] Define the cross-sectional area of ​​the high-voltage zone as Sin and the cross-sectional area of ​​the clean zone as Sout; and

[0020] Sin: Sout > 1.3.

[0021] In an optional embodiment of the present invention, the flow guide sleeve includes a rigid sleeve connected to the air guide tube and a soft sleeve built into the rigid sleeve for accommodating at least a portion of the DC motor commutator.

[0022] In an optional embodiment of the present invention, the DC motor commutator cleaning device further includes a first support for clamping the support guide sleeve and a second support for clamping the DC motor; and

[0023] The first support and / or the second support are further connected to a moving drive mechanism to cause relative movement between the first support and the second support.

[0024] In an optional embodiment of the present invention, the DC motor commutator cleaning device further includes an ion discharge needle with one end adapted to be inserted into the hollow cavity of the flow guide sleeve; the ion discharge needle is connected to an ion generator.

[0025] The precision turning machine for the DC motor commutator of this invention is implemented as follows:

[0026] A DC motor commutator precision machining machine includes: a DC motor commutator cleaning device, a precision machining structure located before the DC motor commutator cleaning device, and an image detection structure located after the DC motor commutator cleaning device.

[0027] The DC motor commutator processing system of the present invention is implemented as follows:

[0028] A DC motor commutator machining system includes: a DC motor commutator precision turning machine.

[0029] The DC motor commutator cleaning method of the present invention is implemented as follows:

[0030] A method for cleaning a DC motor commutator, using the aforementioned DC motor commutator cleaning device; comprising:

[0031] Step S1: The DC motor commutator and the guide sleeve move in opposite directions so that the DC motor commutator is gradually inserted into the hollow cavity of the guide sleeve.

[0032] Step S2: High-pressure airflow is introduced into the air guide tube. The high-pressure airflow enters the guide sleeve and is finally sprayed onto the outer wall of the DC motor commutator through the radial gap between the inner wall of the hollow cavity and the outer wall of the DC motor commutator.

[0033] Step S3: The DC motor commutator and the guide sleeve move out of phase so that the DC motor commutator gradually separates from the hollow cavity of the guide sleeve until the DC motor commutator is completely separated from the guide sleeve, at which point the high-pressure airflow is cut off.

[0034] In an optional embodiment of the present invention, in step S3, when the DC motor commutator and the guide sleeve move out of phase, a pulsed high-pressure airflow is formed in the guide sleeve.

[0035] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: The DC motor commutator cleaning device, precision lathe, processing system and cleaning method of the present invention, when the DC motor commutator and the guide sleeve move towards each other so that the DC motor commutator is gradually inserted into the hollow cavity of the guide sleeve, and then high-pressure airflow is introduced into the air guide tube, when the pressure in the air guide tube reaches a certain level instantaneously, the high-pressure airflow can only flow through the radial gap between the inner wall of the hollow cavity and the outer wall of the DC motor commutator due to the restriction of the guide sleeve, thereby spraying towards the gaps on the surface of the DC motor commutator and the slots of the DC motor commutator. When a foreign object is stuck in the slot, it blocks the flow of airflow at that point, thereby forming a pressure difference on the front and back sides of the foreign object. Due to the pressure difference, the foreign object moves to the side with lower pressure, thereby achieving the effect of removing the foreign object. This process not only effectively ensures the cleaning of foreign objects in the slots and surface gaps of the DC motor commutator, but also effectively utilizes compressed air to clean the foreign objects, thus improving overall energy utilization and reducing energy consumption during the overall cleaning process. Attached Figure Description

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] Figure 1 shows a schematic diagram of the overall structure of the DC motor commutator corresponding to the DC motor commutator cleaning device provided in an embodiment of the present invention.

[0038] Figure 2 shows a schematic diagram of the DC motor commutator cleaning device provided in an embodiment of the present invention;

[0039] Figure 3 shows a schematic diagram of the cooperation state between the guide sleeve and the air guide pipe of the DC motor commutator cleaning device provided in an embodiment of the present invention;

[0040] Figure 4 shows a schematic diagram of the cooperation state between the guide sleeve and the DC motor commutator of the DC motor cleaning device provided in an embodiment of the present invention.

[0041] Figure 5 shows a schematic diagram of the DC motor commutator just extending into the inlet end of the guide sleeve corresponding to the DC motor commutator cleaning device provided in the embodiment of the present invention.

[0042] Figure 6 shows a schematic diagram of the DC motor commutator cleaning device provided in the embodiment of the present invention when the DC motor commutator extends a certain distance into the guide sleeve.

[0043] Figure 7 shows a sectional view along line A of Figure 6;

[0044] Figure 8 shows a cross-sectional view along direction B of Figure 6;

[0045] Figure 9 shows a schematic diagram of the cooperation between the ion discharge needle and the guide sleeve of the DC motor commutator cleaning device provided in an embodiment of the present invention;

[0046] Figure 10 shows a schematic diagram of the structure of the DC motor commutator precision lathe provided in an embodiment of the present invention.

[0047] In the diagram: 1. Air guide pipe; 2. First support seat; 3. Guide sleeve; 31. Hard sleeve; 32. Soft sleeve; 4. Second support seat; 5. Linear screw module; 6. Guide rail assembly; 7. DC motor commutator; 7. Electrode; 72. Gap; 8. Ion discharge needle; 9. Flow direction of high-pressure airflow F. Detailed Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0049] Example 1:

[0050] Referring to Figures 1 to 9, this embodiment provides a DC motor commutator cleaning device, including: a cooperating air guide pipe 1 and a flow guide sleeve 3. The air guide pipe 1 is used to circulate high-pressure airflow; the flow guide sleeve 3 is located at the air outlet of the air guide pipe 1 and has a hollow cavity communicating with the air guide pipe 1; at least a portion of the DC motor commutator 7 is adapted to extend into the hollow cavity of the flow guide sleeve 3. Based on this, the high-pressure airflow entering the air guide pipe 1 flows into the flow guide sleeve 3 and is then sprayed onto the DC motor commutator 7 extending into the flow guide sleeve 3.

[0051] It should be noted that the shape of the hollow cavity of the flow guide sleeve 3 in this embodiment is adapted to the DC motor commutator 7, so that the DC motor commutator 7 can be inserted into the hollow cavity of the flow guide sleeve 3, either partially or entirely. In other words, considering that the DC motor commutator 7 commonly used in conventional technology is a cylindrical structure, the hollow cavity of the flow guide sleeve 3 in this embodiment is also a cylindrical structure.

[0052] Based on the above structure, in this embodiment, the hollow cavity of the guide sleeve 3 and the DC motor commutator 7 form a clearance fit structure. More specifically, a radial gap is formed between the inner wall of the hollow cavity and the outer wall of the DC motor commutator 7, which is suitable for extending into the hollow cavity, so that the high-pressure airflow is sprayed onto the outer wall of the DC motor commutator 7 through the radial gap. In this structure, the guide sleeve 3 in this embodiment restricts and guides the flow direction F of the high-pressure airflow used to clean the DC motor commutator 7, so that the high-pressure airflow can be effectively blown into the slot of the pole piece 71 of the DC motor commutator 7 to achieve the effect of removing foreign objects in the slot.

[0053] More specifically, considering the need to effectively ensure the removal of foreign matter from the outer wall of the DC motor commutator 7 by the high-pressure airflow in this embodiment, the radial gap between the inner diameter D of the inner wall of the hollow cavity and the outer diameter d of the outer wall of the DC motor commutator 7 suitable for extending into the hollow cavity is 0.02–6.0 mm, with a more preferred gap range of 0.1–2.0 mm. It should be noted that, for the DC motor commutator cleaning device of this embodiment, the specific dimensions of the guide sleeve 3 and the size of the hollow cavity inside the guide sleeve 3 are not absolutely limited. In actual use, an appropriate selection is made based on the dimensions of different DC motor commutators 7, as long as the fit gap between the DC motor commutator 7 and the guide sleeve 3 falls within the aforementioned gap range.

[0054] In other words, the DC motor commutator cleaning device of this embodiment only needs to be configured with the corresponding guide sleeve 3 according to the DC motor commutator 7 of different specifications and sizes, while the air duct 1 is universal, thus improving the overall applicability of the cleaning device.

[0055] Next, it should be noted that the DC motor commutator cleaning device of this embodiment also includes a first support 2 for clamping and supporting the guide sleeve 3 and a second support 4 for clamping and supporting the DC motor; and the first support 2 and / or the second support 4 are also connected to a moving drive mechanism to cause relative movement between the first support 2 and the second support 4. It should be noted that a clamping structure is also provided between the first support 2 and the guide sleeve 3 to securely clamp the guide sleeve 3 onto the first support 2. This clamping structure is not absolutely limited in this embodiment; it can be achieved by setting a locking screw on the first support 2 to lock the clamping hole on the first support 2 that clamps the guide sleeve 3. Similarly, a clamping structure is also provided between the second support 4 and the DC motor to securely clamp the DC motor onto the second support 4. This clamping structure is not absolutely limited in this embodiment; it can be achieved by setting a locking screw on the second support 4 to lock the clamping hole on the second support 4 that clamps the DC motor.

[0056] In this embodiment, the DC motor commutator 7 needs to be inserted into the guide sleeve 3 during the cleaning process, and then removed from the guide sleeve 3 after cleaning. Therefore, based on this usage requirement, it is necessary to enable the DC motor commutator 7 and the guide sleeve 3 to move towards and away from each other, so as to achieve the above-mentioned cleaning requirement by switching between the two movement modes. In this case, this embodiment may be configured with a moving drive mechanism to realize the linear movement of the first support 2 and the second support 4, so that the first support 2 and the second support 4 generate relative movement; or the corresponding moving drive mechanism may be configured only in the first support 2 or the second support 4. This embodiment does not make an absolute limitation on this.

[0057] Referring to the accompanying drawings, the drawings of this embodiment only illustrate the case where the second support 4 is equipped with a corresponding moving drive mechanism. Furthermore, it is necessary to further explain that in this embodiment, the guide sleeve 3 and the corresponding DC motor commutator 7 can form a horizontally aligned structure for cleaning foreign objects, which is the structure shown in the accompanying drawings. In this case, the moving drive mechanism of the second support 4 is used to achieve the horizontal reciprocating motion of the second support 4. In fact, in this embodiment, the guide sleeve 3 and the corresponding DC motor commutator 7 can also form a vertically aligned structure perpendicular to the horizontal for cleaning foreign objects. In this case, the moving drive mechanism of the second support 4 is used to achieve the vertical reciprocating motion of the second support 4. Both of these cases satisfy the usage requirements of this embodiment. Regardless of the structure, as long as the coaxial distribution between the hollow cavities of the DC motor commutator 7 and the guide sleeve 3 is satisfied, it is acceptable. The moving drive mechanism used in this embodiment can be a linear screw module 5 in conjunction with a guide rail assembly 6. The linear screw module 5 generates the power for the linear movement of the second support 4 by limiting the movement trajectory of the second support 4 through the guide rail assembly.

[0058] In one optional embodiment, the guide sleeve 3 includes a rigid sleeve 31 connected to the air guide tube 1 and a flexible sleeve 32 built into the rigid sleeve 31 for accommodating at least a portion of the DC motor commutator 7. By using a flexible sleeve 32 that directly engages with the DC motor commutator 7, wear on the outer wall of the DC motor commutator 7 during foreign matter cleaning can be reduced.

[0059] Furthermore, in another optional implementation, for foreign objects in the slots 72 of the pole pieces 71 of the DC motor commutator 7, when the foreign objects (not limited to copper shavings) are attracted by static electricity, the structure of this embodiment can be further improved as follows: the DC motor commutator cleaning device further includes an ion discharge needle 8 with one end adapted to be inserted into the hollow cavity of the guide sleeve 3; the ion discharge needle 8 is connected to an ion generator, which can effectively solve the problem of adsorption or secondary electrostatic adsorption caused by static electricity. Of course, the ion discharge needle 8 here can also be replaced by an ion fan, which is not absolutely limited in this embodiment. That is to say, any structure that can remove static electricity can be set in this embodiment. This embodiment uses the ion discharge needle 8 as an example based on the simplicity of the structure and the controllability of cost.

[0060] Finally, it should be noted that the specific implementation principle of the DC motor commutator cleaning device in this embodiment is as follows: When the DC motor commutator 7 and the guide sleeve 3 move towards each other so that the DC motor commutator 7 is gradually inserted into the hollow cavity of the guide sleeve 3, a high-pressure airflow is introduced into the air pipe 1. When the pressure in the air pipe 1 reaches a certain level instantaneously, the high-pressure airflow can only flow through the radial gap between the inner wall of the hollow cavity and the outer wall of the DC motor commutator 7 due to the restriction of the guide sleeve 3. This airflow is then sprayed onto the gap 72 on the surface of the DC motor commutator 7 and the slot of the DC motor commutator 7. When a foreign object is stuck in the slot, it blocks the flow of airflow at that point, thereby creating a pressure difference on the front and back sides of the foreign object. Due to the pressure difference, the foreign object moves towards the side with lower pressure, thus achieving the effect of removing the foreign object. This means that a high-pressure zone and a clean zone will be formed in the hollow cavity by the high-pressure airflow; the high-pressure zone is formed at the part where the guide sleeve 3 connects to the air guide pipe 1; the clean zone is formed at the part where the guide sleeve 3 is fitted with the DC motor commutator 7. Based on this, the cross-sectional area of ​​the high-pressure zone is defined as Sin, and the cross-sectional area of ​​the clean zone is defined as Sout; in order to ensure a significant pressure difference between the high-pressure zone and the clean zone, thereby effectively ensuring the cleaning effect on foreign objects, Sin: Sout > 1.3.

[0061] In summary, the specific method by which the DC motor commutator cleaning device of this embodiment performs the cleaning operation on the DC motor commutator 7 is as follows:

[0062] The DC motor commutator 7 moves towards the guide sleeve 3 under the action of the second support 4 and the moving drive mechanism. When the DC motor commutator 7 moves to the inlet end of the guide sleeve 3, a high-pressure airflow is introduced into the air pipe 1 through the control of the solenoid valve. When the pressure in the air pipe 1 reaches a certain level, the high-pressure airflow can only flow through the radial gap between the inner wall of the hollow cavity and the outer wall of the DC motor commutator 7 due to the restriction of the guide sleeve 3. This airflow is sprayed onto the gap 72 on the surface of the DC motor commutator 7 and the slot of the DC motor commutator 7, thus removing foreign objects from the slot of the pole piece 71 of the DC motor commutator 7. During this process, the DC motor commutator 7 slowly and continuously moves a certain distance S within the guide sleeve 3, forming a "snow-shoveling" motion to purge foreign objects. When it reaches the set position S, the movement direction of the DC motor commutator 7 is switched, and the solenoid valve switches on and off at a certain frequency, causing the airflow to form a certain pulse impact on the slot of the DC motor commutator 7. When the DC motor commutator 7 moves to the inlet end of the guide sleeve 3, the solenoid valve controls the high-pressure airflow to cut off the high-pressure airflow. In the above process, assuming that for some reason the foreign object is stuck in the commutator slot in one direction, and the blocking pressure is insufficient to move the foreign object, when a pulse high and low pressure impact is applied, the stuck foreign object will be loosened by the high and low pressure impact and thus be carried away again. According to the verification of multiple experiments, the foreign object removal effect is better when the high and low pressure difference is greater than 0.3MPa. It should also be noted that the distance S in the above process is determined by the size of the slot of the DC motor commutator 7 and the length of the DC motor commutator 7, which determines the relative displacement distance S between the DC motor commutator 7 and the guide sleeve 3. When the slot is smaller, the air resistance is higher and the pressure change is more obvious, so the displacement distance S needs to be increased. Conversely, the displacement distance S can be appropriately reduced, but the value of S should be greater than 0.

[0063] Example 2:

[0064] Referring to Figure 10, based on the DC motor commutator cleaning device of Embodiment 1, this embodiment provides a DC motor commutator precision machining machine, including: the DC motor commutator cleaning device of Embodiment 1, a precision machining structure 100 disposed in front of the DC motor commutator cleaning device 200, and an image detection structure 300 disposed in the rear of the DC motor commutator cleaning device 200.

[0065] In this embodiment, both the precision machining structure 100 and the image detection structure 300 can adopt the mature and widely used structures in the prior art. This embodiment does not make any improvements, so the structures of these two parts will not be described in detail.

[0066] Example 3:

[0067] Based on the DC motor commutator precision turning machine of Embodiment 2, this embodiment provides a DC motor commutator processing system, including: the DC motor commutator precision turning machine of Embodiment 2.

[0068] Example 4:

[0069] Based on the DC motor commutator cleaning device of Embodiment 1, this embodiment provides a DC motor commutator 7 cleaning method, using the DC motor commutator cleaning device of Embodiment 1. Specifically, the DC motor commutator 7 cleaning method of this embodiment includes:

[0070] Step S1: The DC motor commutator 7 and the guide sleeve 3 move in opposite directions so that the DC motor commutator 7 is gradually inserted into the hollow cavity of the guide sleeve 3.

[0071] Step S2: High-pressure airflow is introduced into the air guide tube 1. The high-pressure airflow enters the guide sleeve 3 and is finally sprayed onto the outer wall of the DC motor commutator 7 through the radial gap between the inner wall of the hollow cavity and the outer wall of the DC motor commutator 7.

[0072] Step S3: The DC motor commutator 7 and the guide sleeve 3 move out of phase so that the DC motor commutator 7 gradually separates from the hollow cavity of the guide sleeve 3, until the DC motor commutator 7 is completely separated from the guide sleeve 3, at which point the high-pressure airflow is cut off.

[0073] It is also necessary to explain in the above process that when the DC motor commutator 7 and the guide sleeve 3 move out of phase in step S3, a pulsed high-pressure airflow is formed in the guide sleeve 3.

[0074] In detail, the DC motor commutator 7 moves in the direction of the guide sleeve 3. When the DC motor commutator 7 moves to the inlet end of the guide sleeve 3, a high-pressure airflow is introduced into the air pipe 1 through the control of the solenoid valve. When the pressure in the air pipe 1 reaches a certain level, the high-pressure airflow can only flow through the radial gap between the inner wall of the hollow cavity and the outer wall of the DC motor commutator 7 due to the restriction of the guide sleeve 3. This airflow is then sprayed onto the gap 72 on the surface of the DC motor commutator 7 and the slot of the DC motor commutator 7 to remove foreign objects from the slot of the pole piece 71 of the DC motor commutator 7. During this process, the DC motor commutator 7 slowly and continuously moves a certain distance S inside the guide sleeve 3, forming a "snow-shoveling" action to blow away foreign objects. When it moves to the set position S, the movement direction of the DC motor commutator 7 is switched, and the solenoid valve switches on and off at a certain frequency, allowing the airflow to form a certain pulse impact on the slot of the DC motor commutator 7. When the DC motor commutator 7 moves to the inlet end of the guide sleeve 3, the solenoid valve controls the high-pressure airflow to cut off the high-pressure airflow.

[0075] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0076] In the description of this invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0077] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0079] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0080] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A DC motor commutator cleaning device, characterized in that, include: The air duct is used to circulate high-pressure airflow. A flow guide sleeve, which is located at the outlet end of the air guide tube and has a hollow cavity communicating with the air guide tube; At least a portion of the DC motor commutator is adapted to extend into the hollow cavity of the guide sleeve; a radial gap is formed between the inner wall of the hollow cavity and the outer wall of the DC motor commutator adapted to extend into the hollow cavity, so that high-pressure airflow is sprayed onto the outer wall of the DC motor commutator through the radial gap; a high-pressure zone and a clean zone are formed in the hollow cavity by the high-pressure airflow; the high-pressure zone is formed at the part where the guide sleeve connects to the air guide pipe; the clean zone is formed at the part where the guide sleeve and the DC motor commutator are fitted together; the cross-sectional area of ​​the high-pressure zone is defined as Sin, and the cross-sectional area of ​​the clean zone is defined as Sout; and Sin: Sout > 1.3; the guide sleeve includes a rigid sleeve connected to the air guide pipe and a flexible sleeve built into the rigid sleeve for accommodating at least a portion of the DC motor commutator.

2. The DC motor commutator cleaning device according to claim 1, characterized in that, The radial clearance between the inner wall of the hollow cavity and the outer wall of the DC motor commutator suitable for extending into the hollow cavity is 0.02 to 6.0 mm.

3. The DC motor commutator cleaning device according to claim 2, characterized in that, The radial gap between the inner wall of the hollow cavity and the outer wall of the DC motor commutator suitable for extending into the hollow cavity is 0.1 to 2.0 mm.

4. The DC motor commutator cleaning device according to claim 1, characterized in that, The DC motor commutator cleaning device further includes a first support for clamping the support guide sleeve and a second support for clamping the DC motor; and the first support and / or the second support are also connected to a moving drive mechanism to make the first support and the second support move relative to each other.

5. The DC motor commutator cleaning device according to claim 1, characterized in that, The DC motor commutator cleaning device also includes an ion discharge needle with one end adapted to be inserted into the hollow cavity of the guide sleeve; the ion discharge needle is connected to an ion generator.

6. A precision turning machine for a DC motor commutator, characterized in that, include: The DC motor commutator cleaning device as described in any one of claims 1 to 5, the precision machining structure located in front of the DC motor commutator cleaning device, and the image detection structure located in the rear of the DC motor commutator cleaning device.

7. A DC motor commutator processing system, characterized in that, Including the DC motor commutator precision lathe as described in claim 6.

8. A method for cleaning a DC motor commutator, characterized in that, The cleaning device for a DC motor commutator as described in any one of claims 1 to 5 includes: Step S1: The DC motor commutator and the guide sleeve move towards each other so that the DC motor commutator is gradually inserted into the hollow cavity of the guide sleeve; Step S2: High-pressure airflow is introduced into the air guide tube, the high-pressure airflow enters the guide sleeve and is finally sprayed onto the outer wall of the DC motor commutator through the radial gap between the inner wall of the hollow cavity and the outer wall of the DC motor commutator; Step S3: The DC motor commutator and the guide sleeve move away from each other so that the DC motor commutator gradually detaches from the hollow cavity of the guide sleeve, until the DC motor commutator is completely detached from the guide sleeve and the high-pressure airflow is cut off.

9. The DC motor commutator cleaning method according to claim 8, characterized in that, In step S3, when the DC motor commutator and the guide sleeve move out of phase, a pulsed high-pressure airflow is formed in the guide sleeve.

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