Speed reducer gear with self-lubricating structure

Abstract

The utility model discloses a speed reducer gear with self -lubricating structure, including gear body, be provided with sealed oil injection subassembly on the gear body, sealed oil injection subassembly is used for adding lubricating oil to the gear body, the utility model discloses a comprehensive sealing structure has been built through sealed oil injection subassembly, effectively solved the core problem of lubricating oil leakage of current self -lubricating gear non -running state, the annular storage groove of gear body front is as oil storage core, and its slot is realized primary seal through the sealing plate, and the sealing plate is closely locked with gear body through four fastening bolts, and the overall connection stability is ensured, and the elastic sealing rubber strip of inlaying in the annular sealing groove of sealing plate back is formed secondary seal with the annular storage groove slot edge, can adaptive paste slot, fill up tiny gap, and extrusion oil discharge component realizes oil supply with the centrifugal force of gear's own rotation, and completely get rid of the dependence of prior art to small oil pump etc. external power component.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer gear technology, specifically a speed reducer gear with a self-lubricating structure. Background Technology

[0002] With the continuous development of the speed reducer industry, more and more companies are using speed reducers. Speed ​​reducers are used in conjunction with gears. During use, the speed reducer gears need to be lubricated and protected after rotating for a long time. Since the gears do not have self-lubricating facilities, they need to be lubricated manually.

[0003] According to application number CN202123121949.1, a self-lubricating reducer gear is disclosed, including a gear body, a gear reinforcement structure on the outer wall of the gear body, a self-lubricating structure inside the gear body, the self-lubricating structure including a guide groove, a tooth hole at one end of the guide groove, an oil reservoir at the other end of the guide groove, a bearing hole inside the gear body, external gear teeth on the outer wall of the gear body, and an electroplating protective structure on the outer wall of the gear body.

[0004] The gear reducer gears in the above case achieve self-supply of lubricating oil by setting up structures such as oil reservoirs and guide channels, but there are still key technical shortcomings: First, there is a lack of reliable sealing structure. When the gear is not running, the lubricating oil in the oil reservoir is prone to leakage due to gravity or external vibration, resulting in excessive oil loss and frequent oil replenishment. Second, some self-lubricating gears have small oil storage capacity and the oil supply structure depends on external power, such as a small oil pump. This not only increases the size of the equipment and manufacturing cost, but also makes it easy for the oil supply to be interrupted due to the failure of the power components. Therefore, we provide a gear reducer gear with a self-lubricating structure. Utility Model Content

[0005] The purpose of this invention is to provide a reducer gear with a self-lubricating structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a reducer gear with a self-lubricating structure, comprising a gear body, wherein a sealing oil injection component is provided on the gear body, the sealing oil injection component is used to add lubricating oil into the gear body and to seal the lubricating oil, and a squeezing oil discharge component is provided on the gear body, the squeezing oil discharge component is used to discharge the lubricating oil stored in the gear body.

[0007] Preferably, the sealing oil filling assembly includes an annular storage groove, which is formed on the front side of the gear body. A sealing plate is provided on the front side of the gear body, and four fastening bolts threadedly connected to the gear body are provided on the front side of the sealing plate. A filling cap is threadedly connected to the front side of the sealing plate at a position corresponding to the annular storage groove.

[0008] Preferably, the extrusion oil discharge assembly includes an arc-shaped sealing block, and the number of arc-shaped sealing blocks is several and they are respectively arranged inside the annular storage groove. Two oil discharge ports communicating with the annular storage groove are opened on the surface of the gear body and at the positions corresponding to the arc-shaped sealing blocks. Several baffles are installed on the inner wall of the oil discharge ports.

[0009] Preferably, a movable block is installed on the side of the arc-shaped sealing block near the partition, and a fixed groove is provided inside the gear body at the position corresponding to the movable block, and a sealing ring is installed on the inner wall of the fixed groove.

[0010] Preferably, the movable block extends through the annular storage groove, the fixing groove, and the sealing ring in sequence on the side near the sealing ring and extends to the outside of the fixing groove. A detachable stop block is provided on the side of the movable block away from the arc-shaped sealing block, and a fixing bolt that is threadedly connected to the movable block is provided in the groove on the side of the stop block away from the movable block.

[0011] Preferably, a piston is installed on the surface of the movable block and inside the fixed groove, a buffer spring is provided on the surface of the movable block and inside the fixed groove, two positioning blocks are installed on the side of the arc-shaped sealing block near the buffer spring, and a positioning groove is provided on the inner wall of the annular storage groove corresponding to the position of the positioning block.

[0012] Preferably, the front of the sealing plate has an installation port that communicates with the gear body, and the back of the sealing plate has an annular sealing groove corresponding to the position of the annular storage groove. An elastic sealing strip is embedded inside the annular sealing groove, and the back of the elastic sealing strip is tightly fitted to the edge of the annular storage groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model constructs an all-around sealing structure through a sealing oil injection component, effectively solving the core problem of lubricating oil leakage in the non-operating state of existing self-lubricating gears. The annular storage groove on the front of the gear body serves as the core of oil storage. Its groove opening achieves primary sealing through a sealing plate. The sealing plate is tightly locked to the gear body by four fastening bolts to ensure overall connection stability. The elastic sealing strip embedded in the annular sealing groove on the back of the sealing plate forms a secondary seal with the edge of the annular storage groove opening. It can adaptively fit the groove opening and fill tiny gaps. The oil discharge component utilizes the centrifugal force of the gear's own rotation to supply oil, completely eliminating the dependence on external power components such as small oil pumps in existing technologies. When the gear is running, the centrifugal force drives the arc-shaped sealing block in the annular storage groove to move along the groove, causing the moving block to compress the buffer spring in the fixed groove, thereby opening the oil discharge port and accurately delivering the oil to the gear meshing surface through the oil discharge port. After the gear stops rotating, the buffer spring elastically resets, pulling the arc-shaped sealing block and the moving block back to their original positions, automatically closing the oil discharge channel.

[0015] 2. The annular storage tank of this utility model adopts an annular structure surrounding the gear body. Compared with the small oil storage tank of traditional self-lubricating gears, the single oil storage capacity is increased, which can significantly extend the oil replenishment cycle and reduce the interference of downtime oil replenishment on continuous production. The positioning block on the side of the arc-shaped sealing block slides with the positioning groove on the inner wall of the annular storage tank, which can strictly limit the movement trajectory of the arc-shaped sealing block and avoid uneven oil supply caused by centrifugal force deviation. Several baffles on the inner wall of the oil outlet can play a role in diverting and stabilizing the discharged lubricating oil, preventing excessive oil output and waste, ensuring that the meshing surface is always covered with a uniform and stable oil film, and reducing tooth surface wear, pitting and other faults. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the gear body and sealing plate of this utility model after disassembly;

[0018] Figure 3 This is a three-dimensional structural cross-sectional view of the present invention;

[0019] Figure 4 This is a three-dimensional structural diagram of the oil extrusion and discharge assembly of this utility model;

[0020] Figure 5 This is a structural cross-sectional view of the front view of this utility model.

[0021] In the diagram: 1. Gear body; 2. Sealing oil filling assembly; 21. Annular storage tank; 22. Sealing plate; 23. Fastening bolt; 24. Fluid filling cap; 3. Extrusion oil discharge assembly; 31. Arc-shaped sealing block; 32. Oil discharge port; 33. Partition plate; 34. Moving block; 35. Fixed groove; 36. Sealing ring; 37. Stop block; 38. Fixed bolt; 39. Piston; 310. Buffer spring; 311. Positioning block; 312. Positioning groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 A reducer gear with a self-lubricating structure includes a gear body 1, with an installation port on the front for mounting the input shaft. The gear body 1 is made of alloy steel.

[0024] A sealing oil injection assembly 2 is provided on the gear body 1. The sealing oil injection assembly 2 is used to add lubricating oil into the gear body 1 and to seal the lubricating oil. The sealing oil injection assembly 2 includes an annular storage groove 21, which is opened on the front side of the gear body 1. The annular storage groove 21 serves as the core storage cavity for lubricating oil, holding a sufficient amount of lubricating oil. A sealing plate 22 is provided on the front side of the gear body 1. The back side of the sealing plate 22 is in contact with the front side of the gear body 1. The planar sealing structure of the sealing plate 22 is simple and reliable. After being locked by fastening bolts 23, it fits tightly with the gear body 1. The sealing plate 22 is made of aluminum alloy. The front side of the sealing plate 22 has four threads that connect to the gear body 1. The fastening bolt 23 and the sealing plate 22 are threadedly connected to the liquid filling cap 24 on the front side corresponding to the position of the annular storage groove 21. The liquid filling cap 24 can be opened by rotating to facilitate the addition of lubricating oil into the annular storage groove 21. The front side of the sealing plate 22 has an installation port that communicates with the gear body 1. The back side of the sealing plate 22 has an annular sealing groove corresponding to the position of the annular storage groove 21. An elastic sealing strip is embedded in the annular sealing groove. The back side of the elastic sealing strip is tightly fitted to the edge of the groove of the annular storage groove 21. The elastic sealing strip fills the tiny gap between the sealing plate 22 and the groove of the annular storage groove 21 to form a secondary seal and block the leakage path of lubricating oil. It is made of nitrile rubber.

[0025] The gear body 1 is equipped with an oil extrusion and discharge assembly 3, which is used to discharge the lubricating oil stored in the gear body 1. The oil extrusion and discharge assembly 3 includes several arc-shaped sealing blocks 31, which are respectively disposed inside the annular storage groove 21. The arc-shaped sealing blocks 31 are used to open and close the oil discharge ports 32. The arc-shaped sealing blocks 31 are made of tin bronze. The side of the arc-shaped sealing block 31 near the inner wall of the annular storage groove 21 is in contact with the inner wall of the annular storage groove 21. Two oil discharge ports 32 are opened on the surface of the gear body 1 at the positions corresponding to the arc-shaped sealing blocks 31, which are connected to the annular storage groove 21. The oil discharge ports 32 connect the annular storage groove 21 and the gear meshing surface, accurately delivering the extruded lubricating oil to the gear surface that needs lubrication. Several baffles 33 are installed on the inner wall of the oil drain port 32. The baffles 33 serve to divert and stabilize the flow of lubricating oil in the oil drain port 32, preventing the oil from being sprayed out rapidly due to centrifugal force. They disperse the concentrated lubricating oil into a uniform oil flow, ensuring that a continuous and uniform oil film is formed on the gear surface. The baffles 33 are fixedly connected to the oil drain port 32 by welding. The baffles 33 are made of 316 stainless steel plate. A movable block 34 is installed on the side of the arc-shaped sealing block 31 near the baffles 33. The movable block 34 is made of alloy steel and is fixedly connected to the arc-shaped sealing block 31 by welding. A fixing groove 35 is opened inside the gear body 1 at the position corresponding to the movable block 34. A sealing ring 36 is installed on the inner wall of the fixing groove 35. The sealing ring 36 seals the movable block 34. 4. The gap between the fixed groove 35 and the annular storage groove 21 prevents the lubricating oil in the annular storage groove 21 from seeping into the fixed groove 35. The sealing ring 36 is made of nitrile rubber. The side of the moving block 34 near the sealing ring 36 passes through the annular storage groove 21, the fixed groove 35 and the sealing ring 36 in sequence and extends to the outside of the fixed groove 35. A detachable stop block 37 is provided on the side of the moving block 34 away from the arc-shaped sealing block 31. The side of the stop block 37 near the moving block 34 is in contact with the moving block 34. The stop block 37 limits the maximum movement distance of the moving block 34. The stop block 37 is made of stainless steel. A fixing bolt 38 that is threadedly connected to the moving block 34 is provided in the groove on the side of the stop block 37 away from the moving block 34. By providing the fixing bolt 38, the stop block 37 can be removed periodically as needed. To prevent oil from getting on the stop block 37, a piston 39 is installed on the surface of the movable block 34 and inside the fixed groove 35. The surface of the piston 39 slides in contact with the inner wall of the fixed groove 35, and the piston 39 fits tightly against the inner wall of the fixed groove 35. The auxiliary sealing ring 36 enhances the sealing effect of the fixed groove 35 and bears the elastic force of the buffer spring 310, ensuring that the reset force of the buffer spring 310 on the movable block 34 is uniform. The piston 39 is made of low carbon steel wrapped with nitrile rubber. The buffer spring 310 is installed on the surface of the movable block 34 and inside the fixed groove 35. The movable block 34 connects the arc-shaped sealing block 31 and the stop block 37, transmitting centrifugal force and the reset force of the buffer spring 310, driving the piston 39 to slide in the fixed groove 35, assisting in sealing. When the gear stops rotating...The buffer spring 310 provides a reset force, pulling the moving block 34 and the arc-shaped sealing block 31 back to their original positions, sealing the oil drain port 32. The buffer spring 310 is made of spring steel. Two positioning blocks 311 are installed on the side of the arc-shaped sealing block 31 near the buffer spring 310. The positioning blocks 311 are fixedly connected to the arc-shaped sealing block 31 by welding. The positioning blocks 311 are made of alloy steel. A positioning groove 312 is formed on the inner wall of the annular storage groove 21 at the position corresponding to the positioning blocks 311. The side of the positioning block 311 near the positioning groove 312 penetrates the positioning groove 312 and extends into it, sliding in contact with the inner wall of the positioning groove 312. The positioning block 311 is embedded in the positioning groove 312, restricting the sliding direction of the arc-shaped sealing block 31 and preventing it from shifting radially along the annular storage groove 21. The sliding fit clearance is small, ensuring accurate movement of the arc-shaped sealing block 31 and avoiding incomplete sealing of the oil drain port 32.

[0026] When gears are under light load and low speed, such as in small conveyors with a rated speed of 500-1000 r / min, the elastic coefficient of the buffer spring 310 is 5-15 N / mm. When gears are under medium load and medium speed, such as in ordinary machine tools with a speed of 1000-2000 r / min, the elastic coefficient of the buffer spring 310 is 15-30 N / mm. When gears are under heavy load and high speed, such as in construction machinery with a rated speed of 2000-3000 r / min, the elastic coefficient of the buffer spring 310 is 30-50 N / mm. High speeds require large centrifugal forces, necessitating a larger elastic coefficient to buffer impacts. Therefore, the appropriate buffer spring 310 can be selected based on the operating conditions.

[0027] When using, first confirm that the gear body 1 is in a stopped state. Use a tool to unscrew the liquid filling cap 24 on the front of the sealing plate 22, and add lubricating oil suitable for the reducer, such as industrial gear oil, into the annular storage tank 21 along the liquid filling port. Stop adding when the oil level reaches 2 / 3 or 3 / 4 of the volume of the annular storage tank 21, and then screw the liquid filling cap 24 back onto the sealing plate 22.

[0028] When the reducer starts, the gear body 1 begins to rotate with the input shaft. The rotation of the gear body 1 generates centrifugal force, which acts on the arc-shaped sealing block 31 in the annular storage groove 21. When the centrifugal force is greater than the elastic force of the buffer spring 310 in the fixed groove 35, the arc-shaped sealing block 31 slides along the inner wall of the annular storage groove 21. At this time, the positioning block 311 on the arc-shaped sealing block 31 slides synchronously in the positioning groove 312. At the same time, the arc-shaped sealing block 31 drives the connected moving block 34 to move. The piston 39 on the surface of the moving block 34 slides along the inner wall of the fixed groove 35, compressing the buffer spring 310.

[0029] During the sliding process of the arc-shaped sealing block 31, the arc-shaped sealing block 31 separates from the oil drain port 32, thereby opening the oil drain port 32 and allowing the oil to flow towards the oil drain port 32. The lubricating oil is discharged through the oil drain port 32 and flows through several baffles 33 on the inner wall. The baffles 33 divide the concentrated oil flow into a uniform oil jet, avoiding oil splashing and waste due to centrifugal force impact. Finally, the lubricating oil is accurately delivered to the meshing surface of the gear body 1 to form a continuous and uniform oil film, thereby achieving friction lubrication.

[0030] When the gear speed is different, the centrifugal force changes synchronously, which can automatically adapt to the lubrication requirements. When the reducer load increases and the gear speed increases, the centrifugal force increases, the sliding distance of the arc-shaped sealing block 31 is longer, the opening of the oil outlet 32 ​​increases, and the oil discharge volume increases synchronously to meet the lubrication requirements of high-load meshing. When the load decreases and the speed decreases, the centrifugal force weakens, the elasticity of the buffer spring 310 is partially reset, the sliding distance of the arc-shaped sealing block 31 is shortened, the oil discharge volume is reduced, and lubricating oil waste is avoided.

[0031] When the reducer stops and the gear body 1 stops rotating, the centrifugal force disappears, the compressed buffer spring 310 in the fixed groove 35 releases its elasticity, pulling the moving block 34 back to the direction of the annular storage groove 21. The moving block 34 simultaneously drives the arc-shaped sealing block 31 back to its original position until the arc-shaped sealing block 31 re-seals the oil drain port 32, blocking the connection between the annular storage groove 21 and the outside world.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reducer gear with a self-lubricating structure, characterized in that: The gear body (1) is provided with a sealing oil injection assembly (2), which is used to add lubricating oil into the gear body (1) and to seal the lubricating oil. The gear body (1) is provided with a squeezing oil discharge assembly (3), which is used to discharge the lubricating oil stored in the gear body (1).

2. The reducer gear with a self-lubricating structure according to claim 1, characterized in that: The sealing oil filling assembly (2) includes an annular storage groove (21), which is opened on the front of the gear body (1). A sealing plate (22) is provided on the front of the gear body (1). Four fastening bolts (23) that are threaded to the gear body (1) are provided on the front of the sealing plate (22). A liquid filling cap (24) is threaded on the front of the sealing plate (22) at the position corresponding to the annular storage groove (21).

3. The reducer gear with a self-lubricating structure according to claim 2, characterized in that: The extrusion oil discharge assembly (3) includes an arc-shaped sealing block (31). The number of arc-shaped sealing blocks (31) is several and they are respectively arranged inside the annular storage groove (21). Two oil discharge ports (32) that communicate with the annular storage groove (21) are opened on the surface of the gear body (1) at the position corresponding to the arc-shaped sealing block (31). Several partitions (33) are installed on the inner wall of the oil discharge port (32).

4. The reducer gear with a self-lubricating structure according to claim 3, characterized in that: The arc-shaped sealing block (31) has a movable block (34) installed on the side near the partition (33). The gear body (1) has a fixed groove (35) inside and corresponding to the movable block (34). A sealing ring (36) is installed on the inner wall of the fixed groove (35).

5. The reducer gear with a self-lubricating structure according to claim 4, characterized in that: The movable block (34) passes through the annular storage groove (21), the fixing groove (35) and the sealing ring (36) in sequence on the side near the sealing ring (36) and extends to the outside of the fixing groove (35). A detachable stop block (37) is provided on the side of the movable block (34) away from the arc-shaped sealing block (31). A fixing bolt (38) that is threadedly connected to the movable block (34) is provided in the groove of the stop block (37) away from the movable block (34).

6. The reducer gear with a self-lubricating structure according to claim 5, characterized in that: A piston (39) is installed on the surface of the movable block (34) and inside the fixed groove (35). A buffer spring (310) is provided on the surface of the movable block (34) and inside the fixed groove (35). Two positioning blocks (311) are installed on the side of the arc-shaped sealing block (31) near the buffer spring (310). A positioning groove (312) is provided on the inner wall of the annular storage groove (21) at the position corresponding to the positioning block (311).

7. The reducer gear with a self-lubricating structure according to claim 2, characterized in that: The front of the sealing plate (22) is provided with an installation port that communicates with the gear body (1). The back of the sealing plate (22) is provided with an annular sealing groove corresponding to the position of the annular storage groove (21). An elastic sealing strip is embedded inside the annular sealing groove. The back of the elastic sealing strip is tightly fitted to the edge of the groove of the annular storage groove (21).

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