A motor structure without stopping oil

Abstract

The present application relates to the technical field of motor lubrication maintenance, in particular to a motor structure for oiling without stopping, comprising a motor body, a main shaft rod and an oiling box group arranged on one side or both sides of the motor body, the oiling box group comprising a main box body, a rotating disc, an eccentric sleeve block, a paddle, a slip ring sleeve and a guide ring, the rotating disc rotates synchronously with the main shaft rod and drives the paddle to move around the eccentric sleeve block, so that the oil transfer chamber formed between adjacent paddles produces periodic oil suction and oil pressing actions, and the lubricating grease is continuously delivered to the bearing chamber and the main shaft support part through the oiling hole. The main box body is provided with an oil filling port and a detachable shaft seal, which meets the needs of oil supplementing, sealing, waste oil cleaning and maintenance. The structure can realize oil supplementing without stopping under the running state of the motor, has the effect of pressure boosting and delivery, effectively improves the bearing lubrication reliability, reduces wear and tear, and prolongs the service life of the motor.

Description

Technical Field

[0001] This invention relates to the field of motor lubrication and maintenance technology, specifically to a motor structure that allows for oil injection without stopping the machine. Background Technology

[0002] Motors operating under high load, high speed, dusty or high temperature conditions require higher standards for continuous lubrication, reliable sealing, and easy maintenance. Inadequate lubrication management can directly affect the stable operation and service life of the entire machine.

[0003] Most existing motors still rely on periodic shutdowns for grease application or cover removal for oil replenishment. After a period of operation, production must be paused and lubrication performed manually, increasing maintenance costs and disrupting production flow, particularly impacting continuous production lines. While some equipment has external grease fittings, grease is typically forced into internal channels manually, resulting in limited delivery pressure. When bearings are rotating at high speeds or have small internal clearances, grease may not fully penetrate critical friction areas, leading to inadequate lubrication despite the addition of oil. Furthermore, the long-term accumulation of old grease, impurities, and wear particles within the cavities can degrade lubrication performance, increase temperature rise, and even cause bearing noise and damage. Additionally, some structural seals are difficult to disassemble and reassemble, making subsequent cleaning of waste oil and replacement of seals cumbersome and limiting daily maintenance efficiency.

[0004] In view of this, we have studied and improved the existing problems to provide a motor structure that allows for oil injection without stopping the machine, in order to solve the current problems and improve the practical value of the technology. Summary of the Invention

[0005] This invention aims to solve the problem of gradual grease loss in bearings and spindle support parts of existing motor equipment during long-term operation. Traditional grease replenishment methods usually require stopping the machine, removing the cover, and manual grease replenishment, which has low maintenance efficiency and can easily affect the continuous operation of the production line during the shutdown process. At the same time, some static grease filling structures have insufficient grease replenishment pressure, making it difficult for grease to effectively enter the interior of high-speed bearings, which can easily lead to problems such as insufficient lubrication, accelerated wear, and reduced service life. This invention provides a motor structure that allows for grease replenishment without stopping the machine, thereby solving the shortcomings of the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A motor structure for non-stop oil injection includes a motor body and a main shaft arranged at the output end of the motor body. Oil injection box assemblies are provided on one or both sides of the motor body. Each oil injection box assembly includes a main box, a turntable, an eccentric sleeve, a blade, and a slip ring and guide ring fixed inside the main box. The eccentric sleeve is fixed inside the main box and has a bearing chamber coaxially arranged with the main shaft. A ball bearing fitted onto the surface of the main shaft is fixedly installed inside the bearing chamber. The outer periphery of the eccentric sleeve is offset from the axis of the main shaft. The guide ring is coaxially arranged with the outer periphery of the eccentric sleeve. The turntable surface has several connecting pins evenly distributed along the circumference. The turntable is fixedly fitted onto the surface of the main shaft and rotatably mounted inside the main box. One end of the blade is rotatably fitted onto the surface of the connecting pins and slides against the inner side of the slip ring, while the other end slides against the outer periphery of the eccentric sleeve. An oil injection hole communicating with the bearing chamber is opened on the bottom surface of the eccentric sleeve. By rotating the main shaft to drive the turntable and blades, a dynamic oil delivery mechanism can be formed, continuously replenishing grease to the bearing area during equipment operation, thus achieving maintenance without stopping the machine.

[0007] In a preferred embodiment, the blades are further configured such that: the blades have an arc-shaped curved plate structure, with both ends of the blades slidingly abutting against the inner side of the slip ring sleeve and the outer periphery of the eccentric sleeve block, respectively; and both sides of the blades slidingly abutting against the inner side of the main housing and one side of the turntable, respectively. Several independent oil delivery chambers are formed between adjacent blades. Through the linkage between the eccentric contour and the blades, each oil delivery chamber generates periodic volume changes during rotation, forming oil suction and oil pressure actions, thereby improving the continuity of oil delivery.

[0008] In a preferred embodiment, the main housing surface is further configured such that a filling port is provided, which is a one-way valve structure for injecting grease. This one-way oil inlet prevents grease backflow and blocks external impurities from entering, resulting in a more stable internal oil storage state.

[0009] In a preferred embodiment, the eccentric sleeve is further configured such that its outer periphery deviates from the center of the bearing chamber, and the deviation direction is far from the filling port. The oil filling hole is located at the farthest point from the center of the bearing chamber on the surface of the eccentric sleeve and penetrates the eccentric sleeve radially. By reasonably setting the eccentric direction and oil outlet position, the pressure delivery efficiency of the oil delivery chamber can be improved, allowing the grease to enter the bearing area more smoothly.

[0010] In a preferred embodiment, the slip ring is further configured as follows: the slip ring sleeve is a polytetrafluoroethylene ring structure, and its top end has a through hole corresponding to and communicating with the filling port. By using a low-friction, oil-resistant material, the sliding resistance of the propeller blades can be reduced, and the wear resistance and long-term operational stability can be improved.

[0011] In a preferred embodiment, the turntable is further configured such that a plurality of annularly distributed ball bearings are provided on one side of the turntable for sliding or rolling contact with the surface of the motor body end shell, thereby providing support and guidance for the turntable. This rolling support method reduces off-center friction on the turntable and improves rotational stability.

[0012] In a preferred embodiment, the main housing surface is further configured such that a shaft seal is arranged coaxially with the main shaft, the shaft seal being sleeved on the outer periphery of the main shaft and employing a detachable installation structure. This structure prevents internal oil leakage and the entry of external impurities during operation, while facilitating disassembly and cleaning of waste oil, aged grease, and replacement of seals during maintenance.

[0013] In a preferred embodiment, the oil injection box assembly is further configured as follows: two assemblies are arranged on both sides of the motor body, respectively, for synchronously replenishing oil lubrication to the bearings or support parts at both ends of the main shaft. This dual-sided oil supply structure can meet the lubrication needs of equipment operating under high load or for extended periods of continuous operation.

[0014] The beneficial effects achieved by this invention are as follows: 1. By setting up an oil filling box assembly, a filling port, and a rotary table and paddle linkage oil supply structure driven by the main shaft, the lubricating grease can be replenished while the motor is running continuously. The bearings and support parts can be continuously supplied with oil without stopping the machine and disassembling the equipment, thereby reducing maintenance downtime and improving the continuous operation efficiency of production equipment. It is especially suitable for long-cycle operation conditions.

[0015] 2. In this invention, an eccentric sleeve block and several blades form a variable volume oil delivery chamber, which generates periodic oil suction and pressure actions during the rotation of the turntable. This allows the grease to be delivered under positive pressure from the oil storage area to the oil injection hole and bearing area. Compared with the traditional static grease replenishment method, this can improve the efficiency and coverage of grease entering the bearing, and improve the lubrication reliability under high speed or high load conditions.

[0016] 3. In this invention, by setting a shaft seal at the main housing and adopting a detachable installation structure, it ensures that the seal is leak-proof, dustproof, and impurity-proof during operation, while facilitating subsequent disassembly and maintenance. It can promptly clean up accumulated waste oil, aged grease, and wear impurities, and quickly replace the seals, thereby reducing maintenance difficulty and extending the overall service life of the lubrication mechanism. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the oil filling box assembly according to an embodiment of the present invention; Figure 3 This is an exploded view of the oil filling box assembly according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of the main box body according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the turntable and paddle structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the back structure of the turntable and paddle blades according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the surface structure of an eccentric sleeve block according to an embodiment of the present invention.

[0018] Figure label: 100. Motor body; 110. Main shaft; 200. Oil filling box assembly; 210. Main box body; 220. Turntable; 230. Eccentric sleeve block; 240. Paddle blade; 250. Slip ring sleeve; 260. Guide ring; 211. Filling port; 212. Shaft seal; 221. Connecting pin; 222. Ball bearing; 231. Bearing chamber; 232. Ball bearing; 233. Oil hole; 241. Sliding pin; 242. Sliding ball. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0020] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0021] The following describes, with reference to the accompanying drawings, a motor structure for non-stop oil injection provided by some embodiments of the present invention.

[0022] Combination Figures 1-7 As shown, the present invention provides a motor structure for non-stop oil injection, including a motor body 100 and a main shaft 110 arranged at the output end of the motor body 100. The motor body 100 can be an industrial motor, a geared motor, a servo motor, or other power equipment with a rotating output shaft. The main shaft 110 is driven to rotate by the motor body 100 to output power and serves as a linkage drive component of the oil injection mechanism of the present invention.

[0023] As attached Figures 1 to 3 As shown, the motor body 100 is provided with an oil filling box assembly 200 on one or both sides. The oil filling box assembly 200 is used to continuously replenish grease to the support part or bearing area of ​​the main shaft 110 during motor operation. By setting up an independent external oil filling box assembly 200, lubrication maintenance can be completed without disassembling the motor body 100, thereby improving the continuous operation capability of the equipment.

[0024] As attached Figures 2 to 4As shown, the oil filling box assembly 200 includes a main box body 210, a turntable 220, an eccentric sleeve block 230, a paddle 240, and a slip ring sleeve 250 and a guide ring 260 fixed inside the main box body 210. The main box body 210 is a closed cavity structure used to form an oil storage space and support internal transmission components. The main box body 210 can be made of a metal shell or a high-strength engineering plastic shell to meet long-term sealing and mechanical strength requirements.

[0025] As attached Figure 2 and Figure 3 As shown, the surface of the main housing 210 is provided with a filling port 211, which is preferably a one-way valve structure, for replenishing grease into the main housing 210 by an external grease gun or grease injection device. The one-way valve structure can prevent grease backflow and prevent external impurities from entering, so as to maintain a stable oil storage state inside the main housing 210.

[0026] As attached Figure 3 As shown, a shaft seal 212, coaxially arranged with the main spindle 110, is detachably installed at the center of the main housing 210. The shaft seal 212 is sleeved on the outer circumference of the main spindle 110. The shaft seal 212 can be a rubber sealing ring, a skeleton oil seal, or a composite sealing structure, used to prevent internal grease from leaking out and to prevent dust, moisture, and particulate matter from entering the oil filling box assembly 200, thereby improving the overall sealing reliability.

[0027] As attached Figure 2 , Figure 4 and Figure 7 As shown, the eccentric sleeve 230 is fixed inside the main housing 210. A bearing chamber 231, coaxially aligned with the main shaft 110, is provided inside the eccentric sleeve 230. A ball bearing 232, sleeved on the surface of the main shaft 110, is fixedly installed inside the bearing chamber 231. The ball bearing 232 ensures stable support for the main shaft 110 during high-speed rotation and reduces rotational friction resistance. The outer circumferential surface of the eccentric sleeve 230 is eccentrically positioned relative to the axis of the main shaft 110, creating an offset between its outer contour and the rotation center of the main shaft 110, allowing the subsequent blades 240 to undergo volumetric changes.

[0028] As attached Figure 7 As shown, the bottom surface of the eccentric sleeve 230 is provided with an oil injection hole 233, one end of which communicates with the inner side of the bearing chamber 231. Preferably, the oil injection hole 233 is located at the farthest point from the center of the bearing chamber 231 on the surface of the eccentric sleeve 230, and penetrates radially through the eccentric sleeve 230, so as to introduce pressurized grease into the working area of ​​the ball bearing 232 and the support position of the main shaft 110.

[0029] As attached Figure 2 , Figure 5 and Figure 6As shown, the turntable 220 is fixedly sleeved on the surface of the main shaft 110 and rotates synchronously with the main shaft 110. The turntable 220 is rotatably mounted inside the main housing 210, and its surface is provided with several connecting pins 221 evenly distributed in a circumferential direction. Each connecting pin 221 is used to form a rotatable connection with the corresponding blade 240, so that the blade 240 will generate a linked oscillation when the turntable 220 rotates.

[0030] As attached Figure 6 As shown, a number of ball bearings 222 are arranged in a ring on one side of the turntable 220. Each ball bearing 222 slides or rolls against the surface of the end shell of the motor body 100, providing support and guidance for the turntable 220. This structure can reduce the eccentric friction during the rotation of the turntable 220, improve the rotational smoothness, and reduce long-term wear.

[0031] As attached Figure 2 , Figure 5 and Figure 6 As shown, there are multiple blades 240, arranged at intervals along the circumference. Preferably, each blade 240 has an arc-shaped curved plate structure, with one end rotatably fitted onto the surface of the connecting pin 221, and the other end slidingly abutting against the outer periphery of the eccentric sleeve block 230. Both sides of each blade 240 slide against the inner side of the main housing 210 and one side of the turntable 220, respectively, forming several independent oil-transporting chambers between adjacent blades 240.

[0032] As attached Figure 5 and Figure 6 As shown, the propeller blade 240 has a sliding pin 241 and a sliding ball 242 on both sides. The sliding pin 241 is slidably sleeved on the inner side of the guide ring 260, and the sliding ball 242 slides or rolls against one side of the turntable 220. The guide ring 260 is coaxially arranged with the outer circumferential surface of the eccentric sleeve block 230, which can form a circumferential guide limit for the sliding pin 241, so that the movement trajectory of one end of the propeller blade 240 remains stable. The sliding ball 242 can reduce the contact friction between the propeller blade 240 and the turntable 220, reduce wear, and improve the smoothness of operation.

[0033] As attached Figures 2 to 4 As shown, the slip ring sleeve 250 is fixed inside the main housing 210, and is preferably a polytetrafluoroethylene (PTFE) ring structure. The top of the slip ring sleeve 250 has a through hole corresponding to and communicating with the filling port 211, allowing grease injected through the filling port 211 to enter the working area of ​​the propeller 240. PTFE material has a low coefficient of friction and good oil resistance, which can improve the sliding fit life of the propeller 240.

[0034] Working principle and usage process of this invention: During equipment installation, the oil filling box assembly 200 is fixed to one or both sides of the motor body 100, so that the main shaft 110 passes through the main housing 210, the eccentric sleeve 230, and the bearing chamber 231 inside. The ball bearing 232 is sleeved on the surface of the main shaft 110 to ensure stable support when the main shaft 110 rotates at high speed. The shaft seal 212 on the surface of the main housing 210 fits against the outer circumference of the main shaft 110, which can prevent the leakage of internal lubricating grease and prevent external dust, moisture, and other impurities from entering the oil filling box assembly 200. Furthermore, the internal waste oil can be cleaned by disassembling the shaft seal 212.

[0035] Before the equipment is put into operation, grease can be added to the main housing 210 through the filling port 211. Because the filling port 211 adopts a one-way valve structure, backflow is prevented after the grease is forced in, ensuring stable storage of the grease within the working cavity formed by the slip ring sleeve 250, eccentric sleeve block 230, turntable 220, and various blades 240, providing an oil source for subsequent oil replenishment without stopping the machine. Internal waste oil can be replaced by disassembling the shaft seal 212 and simultaneously adding oil.

[0036] When the motor body 100 starts, the main shaft 110 rotates synchronously, driving the turntable 220, which is fixedly sleeved on its surface, to rotate as well. During the rotation of the turntable 220, each connecting pin 221 moves in a circular motion, thereby driving several blades 240 to revolve around the eccentric sleeve 230 and oscillate on the surface of the connecting pins 221. Under the limiting action of the guide ring 260 and the sliding pin 241, one end of the blade 240 slides against the inner side of the slip ring sleeve 250, and the other end slides against the outer circumference of the eccentric sleeve 230. Since the outer circumference of the eccentric sleeve 230 is eccentrically arranged relative to the axis of the main shaft 110, one end of the blade 240 will continuously undergo angular changes and radial displacement during rotation.

[0037] Several independent oil delivery chambers are formed between adjacent blades 240. When the turntable 220 rotates, the volume of each oil delivery chamber periodically increases and decreases. When a chamber is connected to the filling port 211, the increased volume creates an oil suction effect, drawing grease from the oil storage area into the chamber. When a chamber is connected to the oil hole 233, the decreased volume creates a positive pressure pushing effect, pressing the grease along a predetermined path to the oil filling hole 233 on the bottom surface of the eccentric sleeve block 230. Since the oil filling hole 233 is connected to the inside of the bearing chamber 231, the pressurized grease can continuously enter the working area of ​​the ball bearing 232 and the support part of the main shaft 110, realizing dynamic oil replenishment lubrication during motor operation.

[0038] During oil transfer, the sliding pin 241 slides and guides the propeller 240 inside the guide ring 260, keeping the trajectory of one end of the propeller 240 stable. The sliding ball 242 rolls or slides against one side of the turntable 220, reducing the resistance and wear of the propeller 240. Several balls 222 on one side of the turntable 220 contact the end shell surface of the motor body 100, providing rotational support for the turntable 220, reducing off-center load friction, and improving overall operational stability.

[0039] When two oil filling box groups 200 are arranged on both sides of the motor body 100, oil can be added to the bearings or support positions at both ends of the main shaft 110, which is especially suitable for motor equipment that operates continuously for a long time or under high load conditions.

[0040] In summary, this invention utilizes the rotational power of the main shaft 110 to drive the turntable 220 and the paddle 240 to form a volumetric oil delivery structure, continuously pressurizing and delivering lubricating grease to the bearing area without stopping the machine. This eliminates the need for disassembly and shutdown for maintenance, effectively reducing the risk of bearing wear due to lack of lubrication, extending the service life of the motor, and improving the reliability of continuous equipment operation.

[0041] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A motor structure for continuous oil injection, comprising a motor body (100) and a main shaft (110) arranged at the output end of the motor body (100), characterized in that, The motor body (100) is provided with an oil filling box assembly (200) on one or both sides. The oil filling box assembly (200) includes a main box (210), a turntable (220), an eccentric sleeve (230), a blade (240), and a slip ring sleeve (250) and a guide ring (260) fixed inside the main box (210). The eccentric sleeve (230) is fixed inside the main housing (210) and a bearing chamber (231) coaxially arranged with the main shaft (110) is provided inside the eccentric sleeve (230). A ball bearing (232) sleeved on the surface of the main shaft (110) is fixedly installed inside the bearing chamber (231). The outer periphery of the eccentric sleeve (230) is offset from the axis of the main shaft (110), and the guide ring (260) is coaxially arranged with the outer periphery of the eccentric sleeve (230). The turntable (220) has several connecting pins (221) evenly distributed in a circumferential direction on its surface. The turntable (220) is fixedly sleeved on the surface of the main shaft (110) and rotatably installed on the inner side of the main box (210). One end of the paddle (240) is rotatably sleeved on the surface of the connecting pin (221) and slides against the inner side of the slip ring sleeve (250).

2. The motor structure for non-stop oil injection according to claim 1, characterized in that, The other end of the blade (240) slides against the outer periphery of the eccentric sleeve (230), and a sliding pin (241) and a sliding ball (242) are respectively provided on both sides. The sliding pin (241) is slidably sleeved on the inner side of the guide ring (260), and the sliding ball (242) slides against one side of the turntable (220). An oil injection hole (233) is opened on the bottom surface of the eccentric sleeve (230), and one end of the oil injection hole (233) is connected to the inner side of the bearing chamber (231).

3. The motor structure for non-stop oil injection according to claim 1, characterized in that, The blade (240) has an arc-shaped curved plate structure, and the two ends of the blade (240) slide against the inner side of the slip ring sleeve (250) and the outer periphery of the eccentric sleeve block (230) respectively. The two sides of the blade (240) slide against the inner side of the main box (210) and the side of the turntable (220) respectively. An independent chamber structure is formed between adjacent blades (240). During the rotation of the turntable (220), the volume of each chamber changes to carry out positive pressure oil delivery.

4. The motor structure for non-stop oil injection according to claim 1, characterized in that, The main housing (210) has a filling port (211) on its surface. The filling port (211) is a one-way valve structure for injecting grease. The outer periphery of the eccentric sleeve (230) is offset from the center of the bearing chamber (231) and the offset direction is away from the filling port (211). The oil injection hole (233) is located at the farthest end of the surface of the eccentric sleeve (230) from the center of the bearing chamber (231) and penetrates the eccentric sleeve (230) radially.

5. The motor structure for non-stop oil injection according to claim 1, characterized in that, The slip ring sleeve (250) is a polytetrafluoroethylene ring structure, and the top end of the slip ring sleeve (250) is provided with a through hole corresponding to and communicating with the filling port (211).

6. The motor structure for non-stop oil injection according to claim 1, characterized in that, The turntable (220) has a number of ring-shaped balls (222) on one side, which are used to slide against the end shell surface of the motor body (100) to support the rotation of the turntable (220).

7. The motor structure for non-stop oil injection according to claim 1, characterized in that, The main housing (210) is detachably mounted with a shaft seal (212) arranged coaxially with the main shaft (110). The shaft seal (212) is sleeved on the outer periphery of the main shaft (110) to prevent the leakage of oil from the inside of the oil injection box assembly (200) and the entry of external impurities.

8. The motor structure for non-stop oil injection according to claim 1, characterized in that, The eccentric sleeve (230) is fixedly connected to the main box (210), and the inner ring of the ball bearing (232) is fixedly fitted with the main shaft (110), and the outer ring is fixedly fitted with the bearing chamber (231) to ensure that the turntable (220) operates synchronously and stably when the main shaft (110) rotates.

9. The motor structure for non-stop oil injection according to claim 1, characterized in that, The oil injection box assembly (200) is configured in two parts, respectively arranged on both sides of the motor body (100), for synchronous oil replenishment and lubrication of the support parts at both ends of the main shaft (110).

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