Automatic drainage direct-drive grinding head motor
By setting an inlet hole and a drain groove on the shaft of the direct-drive grinding head motor, and combining it with a suction pump, the automatic discharge of liquids and mixtures is achieved, which solves the problem of oil seal hardening caused by liquid accumulation, extends the service life of the motor, and reduces the maintenance frequency.
Patent Information
- Application Number
- CN202422635014.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-10-30
AI Technical Summary
Existing direct-drive grinding head motors cannot effectively prevent the accumulation of liquids and mixtures, leading to hardening and failure of oil seals, shortening the motor's service life, and requiring frequent maintenance.
Design an automatic draining direct-drive grinding head motor. By opening a liquid inlet hole and a liquid draining groove on the rotating shaft, combined with a seal and a squeegee cover, the automatic discharge of liquids and mixtures is achieved, and a suction pump is used to remove them from the motor.
It effectively prevents the accumulation of liquids and mixtures inside the motor, avoids oil seal hardening, extends the motor's service life, and reduces maintenance requirements.
Smart Images
Figure CN223540364U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, specifically to a direct-drive grinding head motor capable of automatic liquid drainage. Background Technology
[0002] A direct-drive grinding head motor is a special type of direct-drive motor that can be directly connected to the grinding head equipment to directly drive the grinding head. This design eliminates the reduction mechanism, such as gearboxes and pulleys, found in traditional motor drive systems, thus simplifying the mechanical structure.
[0003] Existing direct-drive grinding head motors use drainage channels and outlets drilled in the front end cover to achieve waterproofing and drainage. The outlets are located on the outer wall, making them difficult to block effectively and easily causing the outlet to become the inlet.
[0004] The drainage channel has size limitations due to the space required for the rotating parts and the outer diameter of the front cover. If the drainage channel is too small, it is prone to blockage and failure; if the drainage channel is too large, it will cause insufficient rigidity and strength of the bearing housing and vibration.
[0005] In summary, existing direct-drive grinding head motors have consistently failed to effectively prevent the entry of liquids such as water, as well as mixtures of liquids with dust and debris. This results in liquids and mixtures remaining inside the motor, frequently causing the oil seal rubber used for sealing to harden and fail, leading to water ingress. Consequently, the motor malfunctions, shortens its lifespan, and necessitates frequent replacement and repair. Utility Model Content
[0006] In order to overcome at least one of the technical problems existing in the prior art, this utility model provides an automatic draining direct-drive grinding head motor, which can automatically drain liquids and mixtures, prevent them from accumulating in the motor, avoid oil seal hardening and failure, improve the service life of the motor, and reduce the maintenance of the motor.
[0007] An automatic draining direct-drive grinding head motor includes a motor body, a front cover and a rear cover correspondingly installed at the front and rear ends of the motor body, and a rotatable shaft installed inside the motor body. A sealing element is sleeved between the front cover and the shaft. A rotatable squeegee is sleeved at the front end of the front cover. The two ends of the shaft extend to the front cover and the rear cover respectively. The front end of the shaft is sleeved and fixed to the squeegee. The shaft can drive the squeegee to rotate. A draining channel is provided axially inside the shaft. At least one inlet hole is provided radially on the shaft between the sealing element and the squeegee. The inlet hole communicates with the draining channel. A draining groove corresponding to and communicating with the inlet hole is also provided on the outer wall of the shaft.
[0008] In some embodiments, there are two inlet holes and two outlet grooves, which are alternately opened on the outer walls of both sides of the rotating shaft. One inlet hole and outlet groove is located at the end near the seal, and the other inlet hole and outlet groove is located at the end near the squeegee cap.
[0009] In some embodiments, one drainage groove is formed along the forward rotation direction of the shaft, and the other drainage groove is formed along the reverse rotation direction of the shaft.
[0010] In some embodiments, the drainage groove is U-shaped.
[0011] In some embodiments, the seal is a skeleton oil seal.
[0012] In some embodiments, at least one waterproof protrusion is provided on the outer wall of the front end of the front end cover. The diameter of the waterproof protrusion is larger than the diameter of the front end of the front end cover, and an annular gap is formed between the splatter cover and the waterproof protrusion to allow the splatter cover to rotate.
[0013] In some embodiments, the drain channel is a blind hole, and the rear end of the drain channel passes through the rotating shaft axially.
[0014] Additional aspects and advantages of this invention will continue to be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of this invention. Attached Figure Description
[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0016] Figure 1 This is a three-dimensional structural diagram of this application;
[0017] Figure 2 yes Figure 1 A schematic diagram of the partially split structure;
[0018] Figure 3 yes Figure 2 A further breakdown of the structure;
[0019] Figure 4 yes Figure 3 Enlarged view of point A in the middle;
[0020] Figure 5 This is a cross-sectional planar structural diagram of this application;
[0021] Figure 6 yes Figure 5 Enlarged view of point B in the middle;
[0022] Figure 7 This is a cross-sectional three-dimensional structural diagram of this application;
[0023] Figure 8 Figure 7 Enlarged view of point C in the middle;
[0024] Figure 9 This is a schematic diagram of the connection structure between the rotating shaft and the seal.
[0025] Figure label:
[0026] Motor body 1;
[0027] Front cover 2, waterproof protrusion ring 200;
[0028] Rear cover 3;
[0029] Rotating shaft 4, drain channel 400, inlet hole 401, drain groove 402;
[0030] 5. Sealing component; 6. Flush cover. Detailed Implementation
[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0032] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0033] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0035] Reference Figures 1-9 An automatic draining direct-drive grinding head motor includes a motor body 1, a front cover 2 and a rear cover 3 correspondingly installed at the front and rear ends of the motor body 1, and a rotatable shaft 4 installed inside the motor body 1. The rear cover 3 is also called a fan cover. A sealing element 5 is sleeved between the front cover 2 and the shaft 4 to prevent liquids, dust, or debris from flowing along the shaft 4 towards the rear cover 3. A rotatable squeegee 6, also called a mounting base or grinding wheel base, is sleeved at the front end of the front cover 2 and can be used to mount grinding wheels or tools on the end face. The two ends of the shaft 4 extend through the front cover 2 and the rear cover 3 respectively. Outside the end cap 3, the front end of the rotating shaft 4 is sleeved and fixed to the fly cover 6. The rotating shaft 4 can drive the fly cover 6 to rotate. A drain channel 400 is provided axially inside the rotating shaft 4. At least one inlet hole 401 is provided radially on the rotating shaft 4 between the sealing member 5 and the fly cover 6. The inlet hole 401 is connected to the drain channel 400 and is set vertically. A drain groove 402 corresponding to and connected to the position of the inlet hole 401 is also provided on the outer wall of the rotating shaft 4, which facilitates the liquid to enter the inlet hole 401 smoothly and then be discharged to the outside of the motor through the drain channel 400.
[0036] The motor converts electrical energy into mechanical energy to drive the rotation of the shaft 4, the squeegee cover 6, and the grinding wheel. During operation, water or cutting fluid is sprayed onto the workpiece and the squeegee cover 6 to cool, suppress dust, improve machining quality and efficiency, and extend the life of the grinding wheel. Therefore, some liquids and dust may enter the cavity between the seal 5 and the squeegee cover 6 through the annular gap between the front cover 2 and the squeegee cover 6. Because this application has a drain groove 402, a liquid inlet 401, and a drain channel 400 on the rotating shaft 4, when the rotating shaft 4 rotates, the liquid in the chamber will be discharged to the outside of the motor through the drain groove, the liquid inlet 401, and the drain channel 400. The drain channel 400 can also be used as a cleaning channel. A rotary joint can be connected to the rotating shaft 4 located outside the rear end cover 3. The rotary joint is connected to the drain channel 400 and the suction pump respectively. When the suction pump works, the liquid and dust in the chamber can be sucked out, avoiding the hardening and failure of the seal 5 after being soaked in liquid, thus increasing the service life of the motor. This application can automatically discharge liquid and mixture, preventing them from accumulating in the motor, avoiding the hardening and failure of the oil seal, improving the service life of the motor, and reducing the maintenance of the motor.
[0037] In some embodiments, there are two liquid inlet holes 401 and two liquid drain grooves 402. The two liquid inlet holes 401 and two liquid drain grooves 402 are alternately opened on the outer walls of both sides of the rotating shaft 4. One liquid inlet hole 401 and liquid drain groove is located at the end near the seal 5, and the other liquid inlet hole 401 and liquid drain groove is located at the end near the squeegee cover 6. The two liquid inlet holes 401 and liquid drain grooves 402 can be used to adapt to the longitudinal installation state of the squeegee cover 6 of the motor facing upward or downward, and can also drain the liquid inside when the rotating shaft 4 rotates forward or backward.
[0038] In some embodiments, one drainage groove 402 is opened along the forward rotation direction of the rotating shaft 4, and another drainage groove 402 is opened along the reverse rotation direction of the rotating shaft 4; this further facilitates that the liquid inside can be discharged when the rotating shaft 4 rotates forward or reverse.
[0039] In some embodiments, the drain groove 402 is U-shaped, which facilitates the liquid to converge towards the inlet hole 401 and then be discharged from the drain channel 400 to the outside of the motor.
[0040] In some embodiments, the seal 5 is a skeleton oil seal; skeleton oil seals are widely used in various mechanical equipment due to their advantages such as simple structure, light weight, convenient installation, good sealing performance, long service life, convenient disassembly and inspection, and economical price.
[0041] In some embodiments, a plurality of waterproof protrusions 200 are provided on the front outer wall of the front end of the front end cover 2. The diameter of the waterproof protrusions 200 is larger than the front diameter of the front end cover 2, reducing the probability of liquid entering. The structure of the waterproof protrusions 200 combined with the squeegee cover 6 is also commonly referred to as a labyrinth structure. An annular gap is formed between the squeegee cover 6 and the waterproof protrusions 200 to allow the squeegee cover 6 to rotate.
[0042] In some embodiments, the drain channel 400 is a blind hole, and the rear end of the drain channel 400 extends axially through the rotating shaft 4 to facilitate liquid outflow. The blind hole structure can prevent liquid from entering from the front end of the rotating shaft 4.
[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.
Claims
1. An automatic draining direct-drive grinding head motor, comprising a motor body, a front end cover and a rear end cover correspondingly installed at the front and rear ends of the motor body, a rotatable shaft installed inside the motor body, a sealing element sleeved between the front end cover and the shaft, and a rotatable squeegee cover sleeved at the front end of the front end cover, characterized in that: The two ends of the rotating shaft extend to the front and rear covers respectively. The front end of the rotating shaft is fixedly connected to the squeegee cover. The rotating shaft can drive the squeegee cover to rotate. A drain channel is provided axially inside the rotating shaft. At least one inlet hole is provided radially on the rotating shaft between the seal and the squeegee cover. The inlet hole is connected to the drain channel. A drain groove corresponding to and connected to the inlet hole is also provided on the outer wall of the rotating shaft.
2. The automatic draining direct-drive grinding head motor as described in claim 1, characterized in that: There are two liquid inlet holes and two liquid outlet grooves, which are staggered on the outer walls of both sides of the rotating shaft. One of the liquid inlet holes and the liquid outlet groove is located at the end near the seal, and the other liquid inlet hole and the liquid outlet groove is located at the end near the squeegee cover.
3. The automatic draining direct-drive grinding head motor as described in claim 2, characterized in that: One drainage groove is opened in the forward direction of the rotating shaft, and the other drainage groove is opened in the reverse direction of the rotating shaft.
4. The automatic draining direct-drive grinding head motor as described in claim 3, characterized in that: The drainage groove is U-shaped.
5. The automatic draining direct-drive grinding head motor as described in claim 1, characterized in that: The seal is a skeleton oil seal.
6. The automatic draining direct-drive grinding head motor as described in claim 4 or 5, characterized in that: At least one waterproof protrusion is provided on the front outer wall of the front end cover. The diameter of the waterproof protrusion is larger than the front diameter of the front end cover. An annular gap is formed between the fly cover and the waterproof protrusion to allow the fly cover to rotate.
7. The automatic draining direct-drive grinding head motor as described in claim 1, characterized in that: The drainage channel is a blind hole, and the rear end of the drainage channel passes through the rotating shaft along the axial direction.