Servo motor with self-lubricating structure

Abstract

The utility model discloses a servo motor with a self-lubricating structure, which relates to the technical field of servo motors, and is characterized in that the servo motor comprises a motor shell, a gear box is arranged in the motor shell, a gear set is arranged in the gear box, and the gear set comprises output teeth for outputting power outwards and an output shaft arranged on the output teeth. An oil storage tank used for storing lubricating oil is arranged in the gearbox, the outer portion of the oil storage tank is communicated with an oil feeding hose used for oiling the gear set, a pushing and shooting mechanism used for pressurizing the lubricating oil is further arranged, and a transmission assembly is arranged between the pushing and shooting mechanism and the output shaft. The oil storage tank for storing the lubricating oil and the oil conveying hose for conveying the lubricating oil are arranged in the gear box, and the transmission assembly and the push shooting mechanism are matched, so that the output shaft triggers the push shooting mechanism through the transmission assembly during rotating output; and therefore, lubricating oil in the oil storage tank is quantitatively pushed out by the pushing and shooting mechanism to lubricate the gear set, and the stability of the overall output precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of servo motors, and particularly relates to a servo motor with a self-lubricating structure. Background Art

[0002] A servo motor is a motor that can accurately control the rotation angle of a drive shaft. It forms a gear set with a high transmission ratio through a gear combination with different tooth ratios arranged inside, and then makes the rotation angle of the output shaft accurately controllable. Since there is meshing transmission between multiple gears in the gear set of the servo motor, in order to ensure its stable transmission, lubricating oil needs to be added between the gears. However, the servo motor is assembled compactly, which is often not conducive to market disassembly for lubrication and maintenance. This makes the transmission smoothness between the gear sets decrease after long-term use, and it is easy to cause the control output accuracy to deteriorate.

[0003] In view of this, a design or technical improvement is proposed to solve the above problems.

[0004] The above content is only used to assist in understanding the technical solution of the utility model, and does not represent an admission that the above content is the closest prior art. Content of the Utility Model

[0005] The purpose of the utility model is to solve the above deficiencies and provide a servo motor with a self-lubricating structure.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A servo motor with a self-lubricating structure includes a motor housing. A gearbox is arranged inside the motor housing, and a gear set is arranged in the gearbox. The gear set includes an output gear for outputting power and an output shaft arranged on the output gear. A fuel storage tank for storing lubricating oil is arranged in the gearbox, and an oil supply hose for lubricating the gear set is communicated with the outside of the fuel storage tank; A pushing mechanism for pressurizing the lubricating oil is further arranged on the fuel storage tank, and a transmission component is arranged between the pushing mechanism and the output shaft; The output shaft drives the pushing mechanism through the transmission component, so that the pushing mechanism applies pressure to the lubricating oil.

[0008] Further, the pushing mechanism includes an oil pushing plate that seals and slides in the fuel storage tank and a gas pushing component that is communicated with the fuel storage tank for supplying gas into the fuel storage tank. The gas pushing component and the lubricating oil are respectively located on both sides of the oil pushing plate.

[0009] Further, the gas pushing component includes a piston cylinder communicated with the fuel storage tank, a piston plate that seals and slides in the piston cylinder, and a first spring arranged between the piston plate and the side wall of the piston cylinder; One-way valves are arranged on the piston cylinder and between the piston cylinder and the fuel storage tank.

[0010] Further, a piston rod that is slidably inserted through the piston cylinder is provided on the side of the piston plate away from the first spring. The transmission assembly includes a movable shaft rotatably arranged between the output shaft and the piston cylinder through a ratchet, a convex block arranged on the ratchet, and a ratchet plate rotatably arranged on the output shaft and adapted to the ratchet. When the movable shaft rotates one circle, the convex block pushes against the piston rod once.

[0011] Further, a second spring is provided between the ratchet plate and the outer surface of the output shaft, and a limiting plate fixed to the outer surface of the output shaft for limiting the ratchet plate is provided on the side of the ratchet plate away from the second spring.

[0012] Further, a plurality of micropores for dripping lubricating oil are evenly arranged on the oil delivery hose.

[0013] Compared with the prior art, the beneficial effects of this solution are as follows: In the present utility model, an oil storage tank for storing lubricating oil and an oil delivery hose for delivering lubricating oil are provided inside the gearbox, and in cooperation with the transmission assembly and the injection mechanism, when the output shaft rotates and outputs, the transmission assembly triggers the injection mechanism, so that the injection mechanism quantitatively pushes out the lubricating oil in the oil storage tank to lubricate the gear set, ensuring the stability of the overall output accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The schematic diagrams in the specification that form a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0015] Figure 1 is a front three-dimensional schematic diagram of the present utility model;

[0016] Figure 2 is a sectional schematic diagram of the motor housing in the present utility model;

[0017] Figure 3 is an internal structure schematic diagram of the motor housing in the present utility model;

[0018] Figure 4 is a cooperation schematic diagram between the transmission assembly and the injection mechanism in the present utility model;

[0019] Figure 5 is a cooperation schematic diagram between the output shaft and the ratchet in the present utility model;

[0020] Figure 6 is a partial structure schematic diagram of the output shaft in the present utility model;

[0021] Figure 7 is a schematic diagram of the injection mechanism in the present utility model;

[0022] Figure 8It is a schematic structural diagram of the air-pushing component in the present utility model;

[0023] Figure 9 It is a schematic cross-sectional view of the piston cylinder in the present utility model;

[0024] Figure 10 It is a schematic structural diagram of the oil delivery hose in the present utility model.

[0025] In the figure: 1. Motor housing; 11. Gearbox; 12. Output gear; 13. Output shaft; 2. Oil storage tank; 21. Oil delivery hose; 3. Oil pushing plate; 4. Piston cylinder; 41. Piston plate; 42. First spring; 43. Check valve; 5. Piston rod; 51. Ratchet; 52. Movable shaft; 53. Convex block; 54. Ratchet plate; 6. Second spring; 61. Limiting plate; 7. Micro holes. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] As Figures 1-10 shown, a servo motor with a self-lubricating structure includes a motor housing 1. A gearbox 11 is arranged inside the motor housing 1. A gear set is arranged in the gearbox 11. The gear set includes an output gear 12 for outputting power externally and an output shaft 13 arranged on the output gear 12. An oil storage tank 2 for storing lubricating oil is arranged in the gearbox 11. An oil delivery hose 21 for lubricating the gear set is communicated externally with the oil storage tank 2; A pushing mechanism for pressurizing the lubricating oil is further arranged on the oil storage tank 2. A transmission assembly is arranged between the pushing mechanism and the output shaft 13; The output shaft 13 drives the pushing mechanism through the transmission assembly, so that the pushing mechanism applies pressure to the lubricating oil.

[0028] The servo motor is connected to the internal motor through the gear set, thereby increasing the output torque and making the rotation angle of the output shaft 13 controllable, thereby realizing a precise action process. However, the internal lubrication effect of the gear set will decrease after a long period of operation. In order to ensure the output accuracy, an oil storage tank 2 is provided inside the gear box 11, and a certain amount of lubricating oil is poured into the interior. The lubricating oil can be transported to the gear set through the oil delivery hose 21 and lubricated, and the transportation process is controllable. When the output shaft 13 outputs power to the outside, it will be transmitted to the ejection mechanism through the transmission assembly, so that the ejection mechanism delivers the lubricating oil inside the oil storage tank 2 to the gear set in a single extremely small amount through the oil delivery hose 21. In this way, after the output shaft 13 outputs power for a certain period of time, the delivered lubricating oil will gradually and evenly cover the gear set, completing an overall lubrication, thereby achieving the effect of regular automatic maintenance.

[0029] In one embodiment, the ejection mechanism includes an oil pushing plate 3 that slides in a sealed manner in the oil storage tank 2 and an air pushing assembly that is connected to the oil storage tank 2 and is used to deliver air to the oil storage tank 2. The air pushing assembly and the lubricating oil are respectively located on both sides of the oil pushing plate 3. A plurality of groups of micro-holes 7 for dripping the lubricating oil are evenly distributed on the oil delivery hose 21. The oil delivery hose 21 can be adaptively designed according to different arrangements of the gear set inside the gear box 11, so that the micro-holes 7 are aligned with various parts of the gear set to facilitate the spreading of the lubricating oil. Air is delivered into the oil storage tank 2 through the air pushing assembly, so that the oil pushing plate 3 slides, and then the lubricating oil on one side thereof is pushed into the oil delivery hose 21, so that the lubricating oil drips from the micro-holes 7 onto the gear set. In conjunction with the operation of the gear set, the lubricating oil will automatically and evenly spread over the entire gear set.

[0030] In one embodiment, the air thrust assembly includes a piston cylinder 4 connected to the oil tank 2, a piston plate 41 sealingly sliding in the piston cylinder 4, and a first spring 42 arranged between the piston plate 41 and the side wall of the piston cylinder 4; a one-way valve 43 is arranged on the piston cylinder 4 and between the piston cylinder 4 and the oil tank 2, and a piston rod 5 slidingly connected with the piston cylinder 4 is arranged on the side of the piston plate 41 away from the first spring 42, and the transmission assembly includes a movable shaft 52 rotatably arranged between the output shaft 13 and the piston cylinder 4 through the ratchet 51, a protrusion 53 arranged on the ratchet 51, and a ratchet plate 54 rotatably arranged on the output shaft 13 and adapted to the ratchet 51; when the movable shaft 52 rotates one circle, the protrusion 53 pushes the piston rod 5 once.

[0031] The setting form of the ratchet 51 is determined according to the actual use situation of the servo motor, and it can be set correspondingly on both sides of the output shaft 13 or set once. When the use scenario of the output shaft 13 only requires single-direction angle rotation control, the ratchet 51 and the oil pushing plate 3 can be set once. When the output shaft 13 needs to be used for a wider angle rotation, the ratchet 51 and the oil storage tank 2 can be set on both sides of the output shaft 13, so as to ensure that the output shaft 13 can drive the injection mechanism to inject the lubricating oil in the oil storage tank 2 when rotating. The specific working principle is that when the output shaft 13 rotates, the ratchet plate 54 at its upper end drives the ratchet 51 to rotate unidirectionally, so that the movable shaft 52 drives the convex block 53 to rotate. When the convex block 53 rotates one circle, it will engage with the piston rod 5, and then push the piston plate 41 to slide in the piston cylinder 4 through the piston rod 5. Then, air is sent into the oil storage tank 2 through the one-way valve 43 between the piston cylinder 4 and the oil storage tank 2, so that the oil pushing plate 3 slides, and a certain amount of lubricating oil in the oil storage tank 2 is pushed out. When the convex block 53 disengages from the piston cylinder 4, the piston plate 41 resets under the action of the first spring 42, and air is replenished into the piston cylinder 4 through the one-way valve 43 on the piston cylinder 4, and then the second air supply can be carried out. Through multiple air supplies, the lubricating oil drips onto the gear set in extremely small amounts successively until the complete lubrication effect is achieved.

[0032] In an embodiment, a second spring 6 is arranged between the ratchet plate 54 and the outer surface of the output shaft 13. A limiting plate 61 fixed on the outer surface of the output shaft 13 for limiting the ratchet plate 54 is arranged on the side of the ratchet plate 54 away from the second spring 6. When the output shaft 13 rotates unidirectionally, the ratchet plate 54 pushes the ratchet 51 to rotate. When the output shaft 13 rotates reversely, the ratchet 51 will engage with the ratchet plate 54 and rotate towards the output shaft 13 side, so that the second spring 6 is compressed, and thus the ratchet 51 will not be driven to rotate reversely. When the ratchet plate 54 disengages from the ratchet 51, the second spring 6 will push the ratchet plate 54 to reset, and the ratchet plate 54 will not rotate excessively through the limiting plate 61. Through the cooperation of this structure, the output shaft 13 will only drive the ratchet 51 to rotate unidirectionally during the reciprocating rotation output.

[0033] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A servo motor with a self-lubricating structure, comprising a motor housing (1), wherein a gear box (11) is arranged inside the motor housing (1), wherein a gear set is arranged inside the gear box (11), wherein the gear set comprises an output tooth (12) for outputting power to the outside and an output shaft (13) arranged on the output tooth (12), wherein: An oil storage tank (2) for storing lubricating oil is arranged inside the gear box (11), and an oil delivery hose (21) for oiling the gear set is connected to the outside of the oil storage tank (2); The oil storage tank (2) is also provided with a push mechanism for pressurizing the lubricating oil, and a transmission assembly is provided between the push mechanism and the output shaft (13); The output shaft (13) transmits power to the ejection mechanism through the transmission assembly, so that the ejection mechanism applies pressure to the lubricating oil.

2. The servo motor with a self-lubricating structure according to claim 1, characterized in that: The ejection mechanism comprises an oil pushing plate (3) which slides in a sealed manner in the oil storage tank (2) and an air pushing component which is connected to the oil storage tank (2) and is used to deliver air into the oil storage tank (2). The air pushing component and the lubricating oil are respectively located on both sides of the oil pushing plate (3).

3. The servo motor with a self-lubricating structure according to claim 2, characterized in that: The air push assembly comprises a piston cylinder (4) connected to an oil storage tank (2), a piston plate (41) sealingly sliding in the piston cylinder (4), and a first spring (42) arranged between the piston plate (41) and a side wall of the piston cylinder (4); A one-way valve (43) is provided on the piston cylinder (4) and between the piston cylinder (4) and the oil storage tank (2).

4. The servo motor with a self-lubricating structure according to claim 3, characterized in that: A piston rod (5) slidably connected to the piston cylinder (4) is arranged on the side of the piston plate (41) away from the first spring (42); the transmission assembly comprises a movable shaft (52) rotatably arranged between the output shaft (13) and the piston cylinder (4) through a ratchet (51), a convex block (53) arranged on the ratchet (51), and a ratchet plate (54) rotatably arranged on the output shaft (13) and adapted to the ratchet (51); When the movable shaft (52) rotates one circle, the protrusion (53) pushes against the piston rod (5) once.

5. The servo motor with a self-lubricating structure according to claim 4, characterized in that: A second spring (6) is arranged between the ratchet plate (54) and the outer surface of the output shaft (13), and a limiting plate (61) fixed on the outer surface of the output shaft (13) for limiting the position of the ratchet plate (54) is arranged on the side of the ratchet plate (54) away from the second spring (6).

6. The servo motor with a self-lubricating structure according to any one of claims 1 to 5, characterized in that: The oil delivery hose (21) is evenly provided with a plurality of groups of micro holes (7) for dripping lubricating oil.

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