A size head mechanism of a motor spindle
By designing a large-head and small-head mechanism, the large end of the drive shaft forms an axial limit with the shaft hole of the drive motor reducer. Combined with the plane bearing to isolate the rotating parts, the problem of spindle axial movement is solved, achieving efficient cleaning and stable equipment operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI VITHY FILTER SYST CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-07-07
AI Technical Summary
The existing connection between the motor spindle and the drive unit lacks a reliable limiting mechanism, which makes the spindle prone to erratic movement, affecting cleaning efficiency and equipment lifespan.
It adopts a large-head and small-head type mechanism, with the large end diameter of the transmission shaft being larger than the shaft hole of the drive motor reducer. Combined with a plane bearing, it isolates the rotating parts from the fixed parts, forming an axial limit, and transmits torque stably through a key or spline connection.
It effectively prevents spindle movement, reduces friction and wear, ensures cleaning efficiency and equipment life, and enables continuous cleaning.
Smart Images
Figure CN224469480U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fully automatic filter technology, and in particular to a large and small head type mechanism for motor spindle. Background Technology
[0002] In fully automatic filters and other equipment, the rotation of the motor drives the scraper assembly through the spindle. The scraper assembly fits tightly against the inner surface of the filter screen to scrape away impurities. This process requires extremely high stability from the spindle, which directly affects the cleaning efficiency and equipment lifespan. Therefore, the connection between the spindle and the drive device, as well as the design of the limiting structure, are particularly critical.
[0003] In existing technologies, motor spindles mostly adopt a constant diameter structure. When they mate with the shaft hole of the drive motor reducer, axial positioning is usually achieved only by a simple shoulder or clearance fit, lacking a reliable limiting mechanism. In actual operation, due to the frictional rotational force generated by the contact between the scraper and the filter screen, the spindle is prone to axial movement, causing the spindle to detach from the scraper assembly, resulting in a scraping blind zone. This not only reduces cleaning efficiency but also causes overpressure damage to the filter screen due to impurity accumulation, affecting the normal operation of subsequent processes. At the same time, during the spindle movement, the rotating end of the spindle directly contacts and rubs against the fixed reducer base, which easily aggravates the wear of both and may even damage the reducer shaft hole, shortening the overall service life of the equipment. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a large and small head type mechanism for motor spindle, which has the effects of preventing spindle from moving upward, reducing friction and damage, and achieving continuous cleaning.
[0005] The above-mentioned utility model objective is achieved through the following technical solution:
[0006] A type of large and small head mechanism for motor spindle includes a large and small head drive shaft, wherein one end of the large and small head drive shaft is provided with a small end and the other end is provided with a large end;
[0007] The small end of the drive shaft is inserted into the shaft hole of the drive motor reducer;
[0008] The large end diameter of the drive shaft is larger than the diameter of the shaft hole of the drive motor reducer, and it is located outside the shaft hole of the drive motor reducer;
[0009] A plane bearing is provided at the large end of the drive shaft to isolate the drive motor reducer from the shaft end face of the large end of the drive shaft.
[0010] The above technical solution forms a transmission shaft with a large and small head structure. The axial positioning is achieved by using the diameter difference between the large end of the transmission shaft and the shaft hole of the drive motor reducer. At the same time, the rotating parts and the fixed parts are isolated by the plane bearing, which prevents the main shaft from moving upward and reduces friction and wear.
[0011] As a further technical solution of this utility model: the small end of the transmission shaft is connected to the shaft hole of the drive motor reducer by a key or spline.
[0012] Through the above technical solution, the small end of the drive shaft and the shaft hole of the drive motor reducer are connected by a key or spline, which can stably transmit torque, ensure efficient power transmission, and facilitate assembly and maintenance.
[0013] As a further technical solution of this utility model: the planar bearing is a thrust type planar bearing, the inner ring of the planar bearing is in contact with the end face of the large end of the transmission shaft, and the outer ring of the planar bearing is fixed to the drive motor reducer.
[0014] The above technical solution clarifies that the plane bearing is a thrust type and limits its installation method, which can effectively bear the axial load of the motor spindle, further improve the isolation effect and reduce rotational friction, and ensure the stable operation of the mechanism.
[0015] As a further technical solution of this utility model: a connecting section is provided at the end of the large end of the transmission shaft that is far away from the small end of the transmission shaft.
[0016] By using the above technical solution, a connecting section is set at the large end of the drive shaft, providing a structural basis for subsequent connection of other functional components (such as scraper assemblies), thereby enhancing the expandability and adaptability of the mechanism.
[0017] As a further technical solution of this utility model: the connecting section is connected to a scraper assembly.
[0018] Through the above technical solution, the connecting section is connected to the scraper assembly, so that the scraper assembly can rotate synchronously with the drive shaft, realizing the cleaning function of the target object (such as the filter screen) and expanding the practical application value of the mechanism.
[0019] In summary, this utility model has at least one of the following beneficial technical effects:
[0020] 1. This utility model discloses a large-small head type mechanism for motor spindle. Through the structural design of the large-small head transmission shaft (the small end is inserted into the reducer shaft hole, and the large end has a diameter larger than the shaft hole and is equipped with a plane bearing), it can achieve axial positioning of the spindle to prevent upward movement, reduce friction and wear, avoid the accumulation of impurities and the risk of overpressure of the filter screen caused by the detachment of the scraper assembly, and achieve continuous cleaning.
[0021] 2. This utility model discloses a large and small head type mechanism for motor spindle, which achieves a balance between stable torque transmission and convenient assembly and maintenance by connecting the small end of the transmission shaft to the reducer shaft hole via a key or spline connection.
[0022] 3. This utility model discloses a large-head and small-head type mechanism for motor spindle, which achieves efficient linkage between drive structure and functional execution component through the cooperation of the large end connecting section of drive shaft and scraper assembly, thus expanding the practical application scenarios of the mechanism. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of the large and small head type mechanism of the motor spindle of this utility model in the cylinder.
[0024] Figure 2 This is a front view of a motor spindle with a large and small head type mechanism according to the present invention.
[0025] Reference numerals: 1. Reducer drive shaft; 2. Small end of drive shaft; 3. Large end of drive shaft; 4. Drive motor reducer; 5. Surface bearing; 6. Connecting section; 7. Scraper assembly; 8. Filter screen; 9. Cylinder. Detailed Implementation
[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0027] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0029] Reference Figure 1 and Figure 2 This utility model discloses a motor spindle with a large and small head mechanism. The mechanism is set inside the cylinder 9 and includes a large and small head drive shaft 1. The large and small head drive shaft 1 is a shaft with different diameters at both ends. One end of the large and small head drive shaft 1 is a small end 2 with a smaller diameter, and the other end is a large end 3 with a larger diameter. The diameter of the large end 3 is greater than that of the small end 2.
[0030] The small end 2 of the drive shaft and the shaft hole of the drive motor reducer 4 are fitted with a clearance fit. After the small end 2 of the drive shaft is inserted into the shaft hole, it is circumferentially fixed by a key connection (the key is adapted to the keyway on the small end 2 of the drive shaft and the inner wall of the shaft hole) or a spline connection (the outer circle of the small end meshes with the tooth groove on the inner wall of the shaft hole), thereby stably transmitting the torque output by the drive motor reducer 4 to the large and small head drive shaft 1. The above connection avoids power slippage through rigid fit, ensuring that the scraper assembly and the drive shaft operate synchronously; moreover, the key and spline are standardized structures, easy to position and assemble, and easy to replace later, taking into account both the stability of power transmission and the convenience of installation and maintenance.
[0031] The diameter of the large end 3 of the drive shaft is larger than the diameter of the shaft hole of the drive motor reducer 4, and it is set outside the shaft hole of the drive motor reducer 4 to form an axial limiting structure to prevent the main shaft from moving upward.
[0032] A thrust-type thrust bearing 5 (such as a thrust ball bearing) is provided at the large end 3 of the drive shaft. The thrust bearing 5 includes an inner ring, an outer ring, and rolling elements (such as steel balls) located between the two. The inner ring of the thrust bearing 5 is in contact with the end face of the large end 3 of the drive shaft, and its outer ring is fixedly connected to the end face of the housing of the drive motor reducer 4 by bolts or end cap clamping. This thrust bearing 5 can not only bear the axial load of the motor spindle, but also isolate the rotating large end 3 of the drive shaft from the drive motor reducer 4 through the rolling elements, reduce wear on both through rolling friction, and protect the reducer housing and the end face of the shaft.
[0033] Reference Figure 2 A connecting section 6 is provided at the end of the large end 3 of the drive shaft away from the small end 2 of the drive shaft. This connecting section 6 can be fixedly connected to the scraper assembly 7, so that the scraper assembly 7 rotates synchronously with the drive shaft to achieve the cleaning function of the target object (such as the filter screen 8).
[0034] The working process of the large and small head type mechanism for motor spindle of this utility model is as follows:
[0035] When the drive motor reducer 4 starts, power is transmitted to the small end 2 of the drive shaft via a keyed or splined connection, causing the entire drive shaft 1 to rotate. Because the large end 3 of the drive shaft has a larger diameter than the shaft hole of the drive motor reducer 4, it is always confined to the outside of the shaft hole during rotation, forming a stable axial limit. Simultaneously, the inner ring of the thrust-type flat bearing 5 rotates synchronously with the large end 3 of the drive shaft, while the outer ring is fixed to the drive motor reducer 4. Through the rolling action of the rolling elements, the axial load is converted into rolling friction, effectively reducing the frictional resistance between the large end 3 of the drive shaft and the drive motor reducer 4. When the large end 3 of the drive shaft rotates, the connecting section 6 drives the scraper assembly 7 to rotate synchronously. The blades of the scraper assembly 7 contact the surface of the filter screen 8, achieving efficient cleaning through rotational motion.
[0036] The implementation principle of this utility model is as follows: Through the differentiated design of the large and small end drive shaft 1, the difference in diameter between the large end 3 of the drive shaft and the shaft hole of the drive motor reducer 4 forms a physical limit, fundamentally solving the problem of axial movement of the main shaft; the thrust type flat bearing 5, through the separate fixing of the inner and outer rings, transforms the contact between the rotating part and the fixed part from sliding friction to rolling friction, significantly reducing energy loss and extending the service life of the parts; the small end 2 of the drive shaft adopts a key connection or spline connection, transmitting torque through side extrusion, taking into account both power transmission stability and ease of assembly and maintenance; the connecting section 6 of the large end 3 of the drive shaft serves as a functional expansion interface, which can be linked with the scraper assembly 7 and other actuators to achieve real-time cleaning of the filter screen 8.
[0037] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.
Claims
1. A mechanism for a motor spindle with varying head size, characterized in that, It includes a large-diameter drive shaft (1), one end of which is provided with a small end (2) and the other end is provided with a large end (3); The small end (2) of the drive shaft is inserted into the shaft hole of the drive motor reducer (4); The diameter of the large end (3) of the transmission shaft is larger than the diameter of the shaft hole of the drive motor reducer (4), and it is located outside the shaft hole of the drive motor reducer (4); The large end (3) of the drive shaft is provided with a flat bearing (5) to isolate the drive motor reducer (4) and the shaft end face of the large end (3) of the drive shaft.
2. The large and small head type mechanism for a motor spindle according to claim 1, characterized in that, The small end (2) of the transmission shaft is connected to the shaft hole of the drive motor reducer (4) by a key or spline.
3. The large and small head type mechanism for a motor spindle according to claim 1, characterized in that, The planar bearing (5) is a thrust type planar bearing. The inner ring of the planar bearing (5) is in contact with the end face of the large end (3) of the transmission shaft, and the outer ring of the planar bearing (5) is fixed to the drive motor reducer (4).
4. The large and small head type mechanism for a motor spindle according to claim 1, characterized in that, A connecting section (6) is provided at the end of the large end (3) of the drive shaft away from the small end (2).
5. The large and small head type mechanism for a motor spindle according to claim 4, characterized in that, The connecting section (6) is connected to a scraper assembly (7).