An oil injector for precision gear reducer

Abstract

The utility model discloses an oil feeder for precision speed reducer relates to precision speed reducer auxiliary equipment technical field, aiming at the problem of unstable oil supply, insufficient sealing, poor adaptability and complicated maintenance of the prior art oil feeder for precision speed reducer, present and propose the following scheme, including oil drum, the top of oil drum is connected with conveying mechanism, and conveying mechanism includes the bucket cover, the U type frame of welding fixed in the both sides of bucket cover top, the fixed pipe of inserting fixed in the central place of bucket cover top, the conveying pump of being connected in fixed pipe top end, the oil outlet one end of conveying pump is inserted with the connecting hose, and the outer wall one side of connecting hose is provided with the rope. The utility model is accurate and seals well, and the operation is stable and reliable, through the self -adaptation sealing design of the ration delivery of conveying pump and the float, the sealing plug, solve the problem that traditional device supplies oil not steady, and the problem of insufficient sealing, and conveying pump adopts precision gear pump, and pressure fluctuation range falls to plus or minus 0.05MPa, ensures that lubricating oil is evenly supplied.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment technology for precision speed reducers, and in particular to an oil injector for precision speed reducers. Background Technology

[0002] The lubricator for precision speed reducers is a core component of the precision speed reducer lubrication system. Its main function is to continuously or intermittently deliver a set amount of lubricating oil to the gears, bearings, and other key transmission components of the speed reducer according to set requirements. This forms an oil film to reduce friction and wear, while simultaneously carrying away heat generated by localized friction to prevent component overheating and failure. This device must possess characteristics such as precise oil supply, reliable sealing, strong adaptability, and convenient maintenance. It is widely used in high-precision transmission fields and directly affects the transmission efficiency, positioning accuracy, and failure rate of precision speed reducers.

[0003] However, existing lubricators for precision speed reducers have significant shortcomings in practical use.

[0004] On the one hand, the oil supply stability is poor and the sealing is insufficient: traditional oil injectors are mostly gravity oil supply or simple pump body oil supply, the oil supply pressure fluctuates greatly and is prone to uneven oil supply; the oil outlet and reducer interface seal rely on ordinary sealing rings, which are prone to aging and failure after long-term use, polluting the equipment environment and wasting lubricating oil.

[0005] On the other hand, it has poor adaptability and is cumbersome to maintain: the connecting hose lacks a guiding and fixing structure, is easy to tangle and knot, affecting the smoothness of oil supply; the oil outlet mechanism cannot adapt to changes in the oil level inside the reducer, and when the oil level is too low, it is easy to suck in air, and when the oil level is too high, the oil supply resistance increases; adding oil requires stopping the machine to disassemble parts, which has low maintenance efficiency and makes it impossible to visually observe the oil supply status. Utility Model Content

[0006] In view of the shortcomings of the prior art, this utility model provides an oil injector for precision speed reducers, which overcomes the shortcomings of the prior art and effectively solves the problems of unstable oil supply, insufficient sealing, poor adaptability and cumbersome maintenance of existing precision speed reducer oil injectors.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An oil injector for a precision speed reducer includes an oil tank. A conveying mechanism is connected to the top of the oil tank. The conveying mechanism includes a tank cover, a U-shaped frame welded and fixed to both sides of the top of the tank cover, a fixed pipe inserted and fixed to the center of the top of the tank cover, and a conveying pump connected to the top of the fixed pipe. A connecting hose is inserted into one end of the oil outlet of the conveying pump, and a rope is provided on one side of the outer wall of the connecting hose. A pull ring is fixed to the top of the rope, and both the rope and the bottom of the connecting hose are connected to an oil outlet mechanism. The oil outlet mechanism includes an oil outlet pipe, a fixed ring sleeved and fixed to the bottom of the outer wall of the oil outlet pipe, connecting rods evenly distributed along the ring, a connecting ring welded and fixed to the top of the connecting rod, a float welded and fixed to the bottom of the connecting rod, and a sealing plug fixed to the center of the top of the float.

[0009] Preferably, a refueling pipe is inserted and fixed to one side of the top of the barrel lid, and the refueling pipe is equipped with a pipe cap.

[0010] The oil drum is made of 304 stainless steel, with a capacity of 5L, a wall thickness of 3mm, and a polished surface. The lid is made of aluminum alloy and is connected to the oil drum by threads. The sealing gasket is made of nitrile rubber and is 2mm thick. The refueling pipe is made of stainless steel, with a diameter of 20mm and a length of 50mm. The pipe cap is connected to the refueling pipe by threads and is equipped with a silicone sealing ring.

[0011] Preferably, the wall of the connecting hose is fitted with equally spaced collars along its length, and a guide block is welded to one side of the annular outer wall of the collar, with the guide block and the rope forming an insert-slid fit.

[0012] The connecting hose is made of transparent polyurethane, with an inner diameter of 10mm and an outer diameter of 16mm, and is oil and pressure resistant; the collar is made of brass with a spacing of 100mm; the guide block is made of brass and has a guide hole with a diameter of 5mm; and the rope is made of stainless steel wire rope.

[0013] Preferably, the top end of the oil outlet pipe is inserted and fixed to the bottom end of the connecting hose, and the connecting hose is made of transparent material. A connecting block is welded and fixed to one side of the outer wall of the oil outlet pipe, and the connecting block and the rope form an insertion and sliding fit.

[0014] The oil outlet pipe is made of stainless steel, with an inner diameter of 8mm and a length of 150mm. The top end is fixed to the connecting hose by a clamp. The connecting block is made of stainless steel and has a hole with a diameter of 5.5mm for sliding cooperation with the rope.

[0015] Preferably, the top of the fixing ring has through holes distributed at equal intervals along the circumference, and the through holes and the connecting rod form a sliding fit.

[0016] The retaining ring is made of stainless steel with an inner diameter of 16mm, a wall thickness of 3mm, and a through hole diameter of 8.05mm; the connecting rod is made of stainless steel with a diameter of 8mm, a length of 80mm, a polished surface, and a clearance of 0.05mm between it and the through hole.

[0017] Preferably, a hanging ring is welded and fixed to one side of the top of the connecting ring, and the hanging ring is tied and fixed to the bottom end of the rope; the connecting ring is made of stainless steel, with an inner diameter of 20mm and a wall thickness of 2mm.

[0018] The hanging ring is made of stainless steel, with a diameter of 6mm, and is fully welded to the connecting ring. The bottom end of the rope is fixed to the hanging ring by a rope clip.

[0019] Preferably, a screw is welded to the top of the float, and the bottom of the sealing plug is screwed to the screw.

[0020] The float is made of engineering plastic, with a diameter of 40mm and a height of 30mm. The screw is made of stainless steel. The sealing plug is made of fluororubber with a Shore hardness of 70 and a conical top structure, which seals with the bottom of the oil outlet pipe.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1. Precise oil supply and good sealing ensure stable and reliable operation. Through the quantitative delivery of the delivery pump and the adaptive sealing design of the float and sealing plug, the problems of unstable oil supply and insufficient sealing in traditional devices are solved. The delivery pump adopts a precision gear pump, reducing the pressure fluctuation range to ±0.05MPa, ensuring uniform supply of lubricating oil. The float rises and falls with the oil level inside the reducer, driving the sealing plug to dynamically seal the bottom of the oil outlet pipe, reducing the leakage rate. The transparent connecting hose allows for direct observation of the oil supply status, avoiding interruption or over-supply of oil.

[0023] 2. High adaptability and easy maintenance, low operating cost: Relying on the guiding and fixing of ropes and guide blocks, and the convenient oiling design of the oiling pipe, it improves the poor adaptability and complicated maintenance of traditional devices. The rope, together with the guide block and connecting block, guides and fixes the connecting hose, reducing the tangling rate. Oiling can be completed without disassembling parts, shortening the time. The float drives the connecting rod to slide along the fixed ring, adapting to the range of oil level changes without the need for adjustment mechanism. The utilization rate of lubricating oil is improved, the maintenance cost is reduced, and the service life of the equipment is extended. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an oil injector for a precision speed reducer proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the conveying mechanism of an oil injector for a precision speed reducer proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of the connecting hose structure of an oil injector for a precision speed reducer proposed in this utility model;

[0027] Figure 4This is a schematic diagram of the oil outlet mechanism of an oil injector for a precision speed reducer proposed in this utility model.

[0028] In the diagram: 1. Oil drum; 2. Conveying mechanism; 3. Drum lid; 4. Oil filling pipe; 5. U-shaped frame; 6. Fixed pipe; 7. Conveying pump; 8. Connecting hose; 9. Collar; 10. Guide block; 11. Rope; 12. Pull ring; 13. Oil dispensing mechanism; 14. Oil dispensing pipe; 15. Connecting block; 16. Fixed ring; 17. Connecting rod; 18. Connecting ring; 19. Hanging ring; 20. Float; 21. Sealing plug. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] Example:

[0031] Reference Figure 1-4 An oil injector for a precision speed reducer includes an oil tank 1. A conveying mechanism 2 is connected to the top of the oil tank 1. The conveying mechanism 2 includes a tank cover 3, a U-shaped frame 5 welded and fixed to both sides of the top of the tank cover 3, a fixed pipe 6 inserted and fixed to the center of the top of the tank cover 3, and a conveying pump 7 connected to the top of the fixed pipe 6. A connecting hose 8 is inserted into one end of the oil outlet of the conveying pump 7. A rope 11 is provided on one side of the outer wall of the connecting hose 8. A pull ring 12 is fixed to the top of the rope 11. Both the bottom ends of the rope 11 and the connecting hose 8 are connected to an oil outlet mechanism 13. The oil outlet mechanism 13 includes an oil outlet pipe 14, a fixed ring 16 sleeved and fixed to the bottom of the outer wall of the oil outlet pipe 14, connecting rods 17 evenly distributed along the ring, a connecting ring 18 welded and fixed to the top of the connecting rods 17, a float 20 welded and fixed to the bottom of the connecting rods 17, and a sealing plug 21 fixed to the center of the top of the float 20.

[0032] A refueling pipe 4 is inserted and fixed to one side of the top of the barrel lid 3, and the refueling pipe 4 is equipped with a pipe cap. The oil barrel 1 is made of 304 stainless steel, with a volume of 5L, a wall thickness of 3mm, and a polished surface. The barrel lid 3 is made of aluminum alloy and is connected to the oil barrel 1 by threads. The sealing gasket is made of nitrile rubber with a thickness of 2mm. The refueling pipe 4 is made of stainless steel, with a diameter of 20mm and a length of 50mm. The pipe cap is connected to the refueling pipe by threads and is equipped with a silicone sealing ring. The connecting hose 8 has evenly distributed collars 9 fixed along its length. A guide block 10 is welded and fixed to one side of the annular outer wall of the collar 9. The guide block 10 and the rope 11 form an insert-sliding fit. The connecting hose 8 is made of transparent polyurethane, with an inner diameter of 10mm and an outer diameter of 16mm. It is oil and pressure resistant. The collars 9 are made of brass with a spacing of 100mm. The guide block 10 is made of brass and has a guide hole with a diameter of 5mm. The rope 11 is a stainless steel wire rope. The top end of the oil outlet pipe 14 is inserted and fixed to the bottom end of the connecting hose 8. The connecting hose 8 is made of transparent material. A connecting block 15 is welded and fixed to one side of the outer wall of the oil outlet pipe 14. The connecting block 15 and the rope 11 form an insertion and sliding fit.

[0033] The oil outlet pipe 14 is made of stainless steel, with an inner diameter of 8mm and a length of 150mm. Its top end is fixed to the connecting hose 8 with a clamp. The connecting block 15 is made of stainless steel and has a 5.5mm diameter hole for sliding engagement with the rope 11. The top of the fixing ring 16 has evenly spaced through holes along its circumference, which form a sliding fit with the connecting rod 17. The fixing ring 16 is made of stainless steel, with an inner diameter of 16mm, a wall thickness of 3mm, and a through hole diameter of 8.05mm. The connecting rod 17 is made of stainless steel, with a diameter of 8mm, a length of 80mm, and a polished surface, with a 0.05mm clearance between it and the through hole. A hanging ring 19 is welded to one side of the top of the connecting ring 18, and the hanging ring 19 is tied to the bottom end of the rope 11. The connecting ring 18 is made of stainless steel, with an inner diameter of 20mm and a wall thickness of 2mm. The hanging ring 19 is made of stainless steel, with a diameter of 6mm, and is fully welded to the connecting ring 18. The bottom end of the rope 11 is fixed to the hanging ring 19 with a rope clamp. A screw is welded to the top of the float 20, and the bottom of the sealing plug 21 is screwed to the screw. The float 20 is made of engineering plastic, with a diameter of 40mm and a height of 30mm. The screw is made of stainless steel. The sealing plug 21 is made of fluororubber, with a Shore hardness of 70, and has a conical top structure that seals against the bottom of the oil outlet pipe 14.

[0034] Oil drum and conveying mechanism assembly: Oil drum 1 is made of 304 stainless steel plate rolled and welded. After welding, it undergoes a water pressure test {test pressure 1.5MPa, pressure held for 30 minutes without leakage}, and the surface is polished. The drum lid 3 is machined with internal threads, and a mounting hole for the fixing pipe 6 is machined at the center of the top. A mounting hole for the refueling pipe 4 is machined on one side. The refueling pipe 4 is inserted into the hole in the drum lid 3 and welded in place. A silicone sealing ring is installed inside the pipe lid. The fixing pipe 6 is inserted into the center hole of the drum lid 3 and welded in place. U-shaped brackets 5 are welded to both sides of the top of the drum lid 3 {100mm spacing} to fix the conveying pump 7. The conveying pump 7 is fixed to the U-shaped bracket 5 with bolts, and the oil inlet is inserted into the top of the fixing pipe 6 and fixed with clamps.

[0035] Assembly of connecting hose and guide structure: Connecting hose 8 is made of transparent polyurethane tubing, with its top end inserted into the oil outlet of delivery pump 7 and secured with a clamp. After heating, collar 9 is fitted onto connecting hose 8 (100mm spacing), and fixed after cooling. Guide block 10 is welded to one side of collar 9, ensuring the guide holes are coaxial. One end of rope 11 is fixed to pull ring 12, and the other end passes through the guide holes of each guide block 10 in sequence, with a 100mm length reserved at the end for connecting to oil outlet mechanism 13. Connecting block 15 is welded to one side of the outer wall of oil outlet pipe 14 (50mm from the top). Rope 11 passes through the hole in connecting block 15, completing the guide structure assembly.

[0036] Oil outlet mechanism machining and assembly: The fixing ring 16 is milled from stainless steel bar, with its inner wall having an interference fit with the outer wall of the oil outlet pipe 14 (interference amount 0.05mm). After press-fitting and fixing, it is welded for reinforcement. Four through holes are machined on the top of the fixing ring 16 (evenly distributed along the ring). The connecting rod 17 is inserted into the through holes and keeps it sliding flexibly. The connecting ring 18 is welded to the top of the four connecting rods 17, and the hanging ring 19 is welded to one side of the top of the connecting ring 18. A screw is welded to the top of the float 20, and the sealing plug 21 has an internal thread machined on its bottom and is screwed to the screw for fixation. The bottom ends of the four connecting rods 17 are welded to the top of the float 20 to ensure that the float is level (levelness error ≤0.1mm).

[0037] Assembly and performance testing: The top end of the oil outlet pipe 14 is inserted into the bottom end of the connecting hose 8 and secured with a clamp. The end of the rope 11 is tied to the hanging ring 19 and secured with a rope clamp. After the assembly is completed, performance tests are performed: oil supply accuracy test {set flow rate 10mL / min, actual error ±0.2mL / min}; sealing test {oil outlet pipe 14 and sealing plug 21 fit together, pressure 0.5MPa held for 10 minutes without leakage}; guiding test {pulling the connecting hose 8, the rope 11 moves smoothly without jamming}; float lifting test {when the oil level changes from 50-200mm, the sealing plug 21 moves smoothly accordingly, and the seal is reliable}. Fix the oil injector to the bracket next to the reducer, place the oil outlet mechanism 13 into the reducer oil tank, and adjust the length of the rope 11 so that the bottom end of the oil outlet pipe 14 is at a suitable height.

[0038] On-site installation and commissioning: Inject lubricating oil into oil tank 1 through filling pipe 4 (4L of oil injected, oil level observed through the transparent tank), and tighten the pipe cap. Connect the power supply to the delivery pump 7 and set the oil supply parameters (intermittent oil supply, 5mL each time, 10-minute interval). Start the equipment and observe the flow of lubricating oil in the connecting hose 8 (no air bubbles, no interruption in flow). Check the oil outlet mechanism 13: the float 20 rises and falls with the oil level, and the sealing plug 21 fits tightly with the bottom of the oil outlet pipe 14. Run continuously for 24 hours, checking that the oil level inside the reducer is stable, there is no leakage, and all components are operating normally.

[0039] Working principle

[0040] Equipment Installation and Initialization: Based on the installation location of the precision reducer, fix the oil drum 1 to the side bracket, ensuring that the oil drum 1 is placed stably. Open the cap of the filling pipe 4 and inject the appropriate type of lubricating oil into the oil drum 1. Check the oil level through the transparent observation window of the oil drum 1 (to 80% of the volume, i.e., 4L), and tighten the cap. Place the oil outlet mechanism 13 into the reducer's oil tank, pull the pull ring 12 to adjust the length of the rope 11, so that the fixing ring 16 fits against the top mounting surface of the oil tank, and fix the fixing ring 16 with bolts, ensuring that the bottom end of the oil outlet pipe 14 is located in the middle of the oil tank. Connect the power supply to the delivery pump 7 and set the oil supply frequency and single oil supply volume.

[0041] Quantitative oil supply process: When the set oil supply time is reached, the delivery pump 7 starts, and the lubricating oil in the oil tank 1 enters the delivery pump 7 through the fixed pipe 6. After being pressurized by the delivery pump 7 (pressure 0.3MPa), it is delivered to the connecting hose 8. The lubricating oil flows along the connecting hose 8. Under the guidance of the rope 11 and the guide block 10, the connecting hose 8 remains smooth and untangled, and the lubricating oil smoothly enters the oil outlet pipe 14. Under the pressure of the lubricating oil, the sealing plug 21 at the bottom of the oil outlet pipe 14 moves downward together with the float 20, disengaging from the bottom of the oil outlet pipe 14. The lubricating oil is injected into the reducer oil tank, and the delivery pump 7 stops after a single oil supply is completed.

[0042] Oil level adaptive sealing: The oil level in the reducer's oil tank changes with lubrication consumption and the oil filling process. The float 20 rises and falls synchronously with the oil level under buoyancy. When the oil level rises, the float 20 drives the connecting rod 17 to slide upwards along the through hole of the fixed ring 16, and the sealing plug 21 approaches the bottom end of the oil outlet pipe 14 until the oil level reaches the set height. At this point, the sealing plug 21 seals against the bottom end of the oil outlet pipe 14, preventing lubricating oil from overflowing or impurities from entering. When the oil level drops, the float 20 drives the sealing plug 21 to descend, ensuring that the bottom end of the oil outlet pipe 14 is always submerged in oil, preventing air from being drawn in during oil supply.

[0043] Maintenance and Adjustment: Regularly replenish lubricating oil through the oil filling pipe 4. Simply open the pipe cap to add oil directly; no disassembly of the equipment is required. The oil supply status can be visually observed through the transparent connecting hose 8. If insufficient oil supply is detected, check if the rope 11 is stuck and pull the pull ring 12 to adjust the tension of the rope 11. If the height of the oil outlet mechanism 13 needs adjustment, loosen the fixing bolts of the fixing ring 16, pull the pull ring 12 to adjust the length of the rope 11, and then re-fix it. After long-term use, if the sealing plug 21 is worn, simply unscrew the sealing plug 21 and replace it. The maintenance process is simple and quick and does not affect the normal operation of the reducer.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A precision reducer lubricator, comprising an oil tank (1), characterized in that, The top of the oil drum (1) is connected to a conveying mechanism (2), and the conveying mechanism (2) includes a drum cover (3), a U-shaped frame (5) welded and fixed to both sides of the top of the drum cover (3), a fixed pipe (6) inserted and fixed to the center of the top of the drum cover (3), and a conveying pump (7) connected to the top of the fixed pipe (6). One end of the oil outlet of the conveying pump (7) is connected to a connecting hose (8), and a rope (11) is provided on one side of the outer wall of the connecting hose (8). A pull ring is fixed to the top of the rope (11). 12), and the bottom ends of the rope (11) and the connecting hose (8) are both connected to an oil outlet mechanism (13). The oil outlet mechanism (13) includes an oil outlet pipe (14), a fixing ring (16) sleeved and fixed to the bottom end of the outer wall of the oil outlet pipe (14), a connecting rod (17) distributed at equal intervals along the ring, a connecting ring (18) welded and fixed to the top of the connecting rod (17), a float (20) welded and fixed to the bottom end of the connecting rod (17), and a sealing plug (21) fixed to the center of the top of the float (20).

2. The oil injector for a precision speed reducer according to claim 1, characterized in that, A refueling pipe (4) is inserted and fixed on one side of the top of the barrel lid (3), and the refueling pipe (4) is equipped with a pipe cap.

3. The oil injector for a precision speed reducer according to claim 1, characterized in that, The connecting hose (8) has equidistantly distributed collars (9) sleeved and fixed along its length. A guide block (10) is welded and fixed on one side of the annular outer wall of the collar (9). The guide block (10) and the rope (11) form a sliding fit.

4. The oil injector for a precision speed reducer according to claim 1, characterized in that, The top end of the oil outlet pipe (14) is inserted and fixed to the bottom end of the connecting hose (8), and the connecting hose (8) is made of transparent material. A connecting block (15) is welded and fixed to one side of the outer wall of the oil outlet pipe (14), and the connecting block (15) and the rope (11) form an insertion sliding fit.

5. The oil injector for a precision speed reducer according to claim 1, characterized in that, The top of the fixing ring (16) has through holes distributed at equal intervals along the circumference, and the through holes and the connecting rod (17) form a sliding fit.

6. The oil injector for a precision speed reducer according to claim 1, characterized in that, A hanging ring (19) is welded and fixed to one side of the top of the connecting ring (18), and the hanging ring (19) is tied and fixed to the bottom end of the rope (11).

7. The oil injector for a precision speed reducer according to claim 1, characterized in that, The top of the float (20) is welded and fixed with a screw, and the bottom of the sealing plug (21) is screwed to the screw.

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