RV reducer with butter nozzle

Abstract

The utility model relates to a RV speed reducer with butter nozzle, it includes the oil channel of setting in needle tooth shell inside and install on the butter nozzle of oil channel, and the oil channel includes the first oil channel through the first oil channel of oil outlet location between the first cycloidal gear and second bearing of setting in needle tooth shell lateral wall, and the oil inlet of first oil channel is provided with the screw hole, and the butter nozzle includes butter nozzle body, and the one -way valve is built -in in butter nozzle body. The RV speed reducer integrates butter nozzle on RV speed reducer, and through the direct butt joint of butter gun with butter nozzle, has realized the quick lubrication maintenance to RV speed reducer inside. First oil channel is oblique design, can guide the greasy even cover in the friction pair surface in combination with gravity effect, improves lubrication efficiency. Through setting up third oil channel, can lubricate along needle tooth pin length direction two sections simultaneously, further improved lubrication efficiency. The one -way valve is built -in in butter nozzle, can effectively prevent the impurity of outside from entering the oil channel, avoids the abrasion of component because of pollution.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, specifically to an RV speed reducer with a grease nipple. Background Technology

[0002] The RV reducer is a precision transmission mechanism composed of a planetary gear reduction mechanism and a cycloidal pinwheel reduction mechanism. It features a compact structure, large transmission ratio, low vibration, and low noise. This device employs a two-stage reduction design: the first stage is an involute planetary gear reduction, and the second stage achieves differential transmission through the eccentric motion of the cycloidal pinwheel and crankshaft, combining high precision, large transmission ratio, high rigidity, and low vibration characteristics. Existing RV reducers suffer from the following technical drawbacks: 1. Traditional lubrication methods require disassembling the outer casing, resulting in low maintenance efficiency; 2. Frequent disassembly and assembly can easily damage seals, affecting reducer accuracy; 3. Rapid lubrication is difficult to achieve in field or high-altitude operating environments. The RV reducer used by the applicant in the production process is vertically mounted, with the power output end located at the top. To achieve rapid maintenance of the reducer, it is necessary to design an RV reducer based on this usage method that facilitates internal lubrication maintenance. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an RV reducer with a grease nipple, which integrates the grease nipple into the RV reducer and allows for rapid lubrication and maintenance of the RV reducer by directly connecting the grease gun to the grease nipple.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: An RV reducer with grease nipples includes a pin gear housing and an input disc and an output disc disposed at both ends of the pin gear housing. A first bearing and a second bearing are respectively disposed between the input disc and the pin gear housing. A planetary gear reduction mechanism and a cycloidal pinwheel reduction mechanism are disposed inside the pin gear housing, wherein the cycloidal pinwheel reduction mechanism is located on the side closer to the input disc. The reducer also includes an oil passage disposed inside the pin gear housing and grease nipples mounted on the oil passage. The oil passage includes a first oil passage that runs through the side wall of the pin gear housing. The oil outlet of the first oil passage is located between the first cycloidal pinwheel and the second bearing. A threaded hole is provided at the oil inlet of the first oil passage. The grease nipple includes a grease nipple body, the oil outlet end of which is provided with an external thread corresponding to the threaded hole; the inside of the grease nipple body is provided with an oil inlet channel, a main channel and an oil outlet channel in sequence from the oil inlet end to the oil outlet end, wherein the main channel is hourglass shaped and a conical spring is provided on the side of the main channel near the oil outlet channel, and a ball is provided at the small end of the conical spring; several sub-channels are provided on the side wall of the grease nipple body on the side where the conical spring is provided in the main channel and between the oil outlet channel.

[0005] In one embodiment of this utility model, a third oil passage is also provided inside the needle tooth shell. The third oil passage is connected to the first oil passage through the second oil passage, and the oil outlet of the third oil passage is located between the first cycloidal wheel and the second cycloidal wheel.

[0006] In one embodiment of this utility model, the first oil passage is inclined from the outside to the inside, with its oil inlet end far away from the first cycloidal wheel and its oil outlet end close to the first cycloidal wheel.

[0007] In one embodiment of this utility model, the included angle between the first oil passage and the first cycloidal wheel is 15°-30°.

[0008] In one embodiment of this utility model, a spacer is provided between the first cycloidal wheel and the second cycloidal wheel, and the oil outlet of the third oil passage avoids the pin mounting groove for mounting pin pins on the inner wall of the pin housing and is located between adjacent pin pins.

[0009] In one embodiment of this utility model, a stepped platform is provided on the inner wall of the needle tooth shell, and the first bearing and the second bearing are restricted to the outside of the stepped platform.

[0010] In one embodiment of this utility model, an oil seal is provided between the needle tooth housing and the output disc on the outside of the second bearing.

[0011] In one embodiment of this utility model, the grease nipple body is a rotating body with cylindrical ends and an outer diameter smaller than the middle outer diameter. The oil inlet channel and the oil outlet channel are cylindrical, wherein the oil inlet channel has the same diameter as one end of the main channel, and the oil outlet channel has a smaller diameter than the other end of the main channel. The conical spring is inserted into the main channel.

[0012] In one embodiment of this utility model, the ball is fixed on a conical spring; the diameter of the ball is larger than the diameter of the drain hole in the middle of the main channel; and the oil inlet end of the grease nipple body is provided with an external thread.

[0013] In one embodiment of this utility model, multiple grease nipples are evenly arranged around the circumference of the needle tooth shell.

[0014] The beneficial effects of adopting the above technical solution are as follows: This utility model provides an RV reducer with grease nipples, integrating the grease nipples directly onto the RV reducer. A grease gun can be used to directly connect to the grease nipples, enabling rapid lubrication and maintenance of the RV reducer's internal components. The inclined design of the first oil passage, combined with gravity, guides the grease to evenly cover the friction pair surfaces, improving lubrication efficiency. By providing a third oil passage, lubrication can be performed simultaneously in two sections along the length of the pin teeth, further enhancing lubrication efficiency.

[0015] The grease nipple features a cleverly designed structure with a built-in one-way valve composed of a conical spring and ball bearings. This effectively prevents external impurities from entering the oil passages, avoiding component wear caused by contamination. By designing separate channels, the conical spring is prevented from reducing the grease passage cross-section during compression, allowing the grease to smoothly enter the oil passages of the needle tooth housing. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0018] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of the first cycloidal wheel, the second cycloidal wheel, and the spacer in this utility model.

[0020] Figure 5 This is a cross-sectional structural diagram of the grease nipple in this utility model.

[0021] Figure 6 This is a schematic diagram of the internal structure of the grease nipple in this utility model.

[0022] The components include: 1. Needle housing, 101. Step, 2. Needle pin, 3. First cycloidal wheel, 4. Second cycloidal wheel, 5. Spacer, 6. Input shaft, 7. Input gear, 8. Planetary gear, 9. Input disc, 10. Output disc, 11. First bearing, 12. Second bearing, 13. Oil seal, 14. First oil passage, 15. Second oil passage, 16. Third oil passage, 17. Threaded hole, 18. Grease nipple body, 19. Oil inlet channel, 20. Main channel, 2001. Leakage hole, 21. Oil outlet channel, 22. Sub-channel, 23. Ball bearing, 24. Conical spring, 25. Magnetic cover. Detailed Implementation

[0023] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be clearly and completely described below in conjunction with specific embodiments.

[0024] like Figures 1-6The illustrated RV reducer with grease fittings includes a pin housing 1 and an input disc 9 and an output disc 10 disposed at both ends of the pin housing 1. A first bearing 11 and a second bearing 12 are respectively disposed between the input disc 9 and the output disc 10 and the pin housing 1. A planetary gear reduction mechanism and a cycloidal pinwheel reduction mechanism are disposed within the pin housing 1, with the cycloidal pinwheel reduction mechanism located closer to the input disc 9 and the planetary gear reduction mechanism located further away from the input disc 9. An input gear 7 on the input shaft 6 meshes with three planetary gears 8 evenly arranged around the input shaft 6. The planetary gears 8 drive the cycloidal pinwheel reduction mechanism via a crankshaft. After speeding up, power is output through the output disc 10. The cycloidal pinwheel reduction mechanism includes a first cycloidal wheel 3 and a second cycloidal wheel 4 disposed between the first bearing 11 and the second bearing 12, wherein the second cycloidal wheel 4 is disposed close to the first bearing 11 and the first cycloidal wheel 3 is disposed close to the second bearing 12. The reducer also includes an oil passage disposed inside the pin gear housing 1 and a grease nipple mounted on the oil passage. The oil passage includes a first oil passage 14 that runs through the side wall of the pin gear housing 1. The oil outlet of the first oil passage 14 is located between the first cycloidal wheel 3 and the second bearing 12 of the cycloidal pinwheel reduction mechanism. A threaded hole 17 is provided at the oil inlet of the first oil passage 14. The grease nipple includes a grease nipple body 18, the oil outlet end of which is provided with an external thread corresponding to the threaded hole 17; the grease nipple body 18 has an oil inlet channel 19, a main channel 20 and an oil outlet channel 21 arranged sequentially from the oil inlet end to the oil outlet end inside, wherein the main channel 20 is hourglass-shaped, and a conical spring 24 under a certain compression state is provided on the side of the main channel 20 near the oil outlet channel 21, the small end of the conical spring 24 is located on the inner side, and the small end is provided with a ball 23 corresponding to the reduced diameter of the middle of the drain hole 2001; a number of sub-channels 22 are provided on the side wall of the main channel 20 where the conical spring 24 is provided and the oil outlet channel 21.

[0025] As a further improvement, a third oil passage 16 is also provided inside the needle housing 1. The third oil passage 16 is connected to the first oil passage 14 through the second oil passage 15. The oil outlet of the third oil passage 16 is located between the first cycloidal wheel 3 and the second cycloidal wheel 4. The second cycloidal wheel 4 is located on the side of the first cycloidal wheel 3 closer to the input disk 9. As a further optimization, the first oil passage 14 is inclined from the outside to the inside, with its oil inlet end away from the first cycloidal wheel 3 and its oil outlet end close to the first cycloidal wheel 3. Figure 1 As shown, in this embodiment, the RV reducer is vertically arranged, and the first oil passage 14 is inclined in a vertical plane along the radial direction of the pin tooth housing 1. The included angle between the first oil passage 14 and the first cycloidal wheel 3 is 15°-30°.

[0026] This utility model provides an RV reducer with an integrated grease nipple. The grease nipple is directly connected to the RV reducer via a grease gun through threads, enabling rapid lubrication and maintenance of the RV reducer's internal components. The first oil passage 14 features an optimized angled design, which, combined with the gravity of the grease, guides the grease to evenly cover the friction pair surface, improving lubrication efficiency. By providing a third oil passage 16, lubrication can be performed simultaneously in two sections along the length of the pin 2, further enhancing lubrication efficiency.

[0027] The grease nipple features a cleverly designed structure with a built-in one-way valve composed of a conical spring 24 and a ball bearing 23. This effectively prevents external impurities from entering the oil passages, avoiding component wear caused by contamination. As the conical spring 24 compresses, the gaps on it gradually decrease. By incorporating a branch channel 22, the cross-sectional area of ​​the grease passage is prevented from decreasing due to compression, allowing the grease to smoothly enter the oil passages of the needle gear housing 1. This RV reducer simplifies the lubrication and maintenance process, significantly improves equipment maintainability, enhances operational stability, and significantly reduces the failure rate.

[0028] As a further optimization, the included angle between the first oil passage 14 and the first cycloidal wheel 3 is 22.5°±5°.

[0029] like Figure 2 As shown, specifically, a spacer 5 is provided between the first cycloidal wheel 3 and the second cycloidal wheel 4. The inner wall of the needle tooth housing 1 is provided with a plurality of needle tooth mounting grooves evenly arranged circumferentially. The needle tooth mounting groove is provided with a needle tooth pin 2 that cooperates with the cycloidal wheel. The oil outlet of the third oil passage 16 avoids the needle tooth mounting groove for mounting the needle tooth pin 2 on the inner wall of the needle tooth housing 1 and is located between adjacent needle tooth pins 2.

[0030] A step 101 is provided on the inner wall of the needle housing 1, and the first bearing 11 and the second bearing 12 are restricted to the outside of the step 101. An oil seal 13 is provided between the needle housing 1 and the output disk 10 on the outside of the second bearing 12.

[0031] like Figure 5 and Figure 6As shown, the grease nipple body 18 is a rotating body with cylindrical ends and outer diameters at both ends smaller than the outer diameter at the middle. The oil inlet channel 19 and oil outlet channel 21 are cylindrical, with the oil inlet channel 19 having the same diameter as one end of the main channel 20 and being flush-jointed. The diameter of the oil outlet channel 21 is smaller than the diameter at the other end of the main channel 20. The portion of the main channel 20 located between the drain hole 2001 and the oil outlet channel 21 is conical, with its inner diameter larger than the small end diameter of the conical spring 24 and its outer diameter matching the outer end diameter of the conical spring 24, thus allowing the large end of the conical spring 24 to be locked within the main channel 20. The large end diameter of the main channel 20 near the oil outlet channel 21 is slightly larger than the diameter of the oil outlet channel 21 to facilitate the smooth installation of the conical spring 24. When installing the conical spring 24, the portion of the conical spring 24 with a diameter larger than that of the oil outlet channel 21 is squeezed and deformed before being squeezed into the main channel 20 from the oil outlet channel 21. Afterward, the conical spring 24 returns to its original shape.

[0032] Preferably, the ball bearing 23 is fixed on the conical spring 24; the diameter of the ball bearing 23 is larger than the diameter of the drain hole 2001 in the middle of the main channel 20; and the oil inlet end of the grease nipple body 18 is provided with an external thread.

[0033] Preferably, multiple butter nozzles are evenly arranged around the circumference of the needle tooth shell 1; in this embodiment, three nozzles are provided.

[0034] Preferably, the grease nipple is made of stainless steel, and the inner walls of its internal oil inlet channel 19, main channel 20, oil outlet channel 21 and branch channel 22 are plated with copper to reduce flow resistance.

[0035] In addition, a rotating protective cap or a magnetic cap 25 with internal threads is provided at the oil inlet end of the grease nipple body 18 to prevent dust from entering the grease nipple. Preferably, the outer diameter of the rotating protective cap or magnetic cap 25 is the same as the outer diameter of the middle part of the grease nipple body 18.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An RV reducer with a grease nipple, comprising a pin gear housing (1) and an input disc (9) and an output disc (10) disposed at both ends of the pin gear housing (1), wherein a first bearing (11) and a second bearing (12) are respectively disposed between the input disc (9) and the output disc (10) and the pin gear housing (1), and a planetary gear reduction mechanism and a cycloidal pinwheel reduction mechanism are disposed inside the pin gear housing (1), wherein the cycloidal pinwheel reduction mechanism is located on the side closer to the input disc (9), characterized in that: It also includes an oil passage provided inside the needle tooth housing (1) and a grease nipple installed on the oil passage. The oil passage includes a first oil passage (14) that runs through the side wall of the needle tooth housing (1). The oil outlet of the first oil passage (14) is located between the first cycloidal wheel (3) and the second bearing (12). A threaded hole (17) is provided at the oil inlet of the first oil passage (14). The grease nipple includes a grease nipple body (18), the oil outlet end of the grease nipple body (18) is provided with an external thread corresponding to the threaded hole (17); the inside of the grease nipple body (18) is provided with an oil inlet channel (19), a main channel (20) and an oil outlet channel (21) in sequence from the oil inlet end to the oil outlet end, wherein the main channel (20) is hourglass shaped, and a conical spring (24) is provided on the side of the main channel (20) near the oil outlet channel (21), and a ball (23) is provided at the small end of the conical spring (24); a number of sub-channels (22) are provided on the side wall of the grease nipple body (18) on the side where the conical spring (24) is provided on the main channel (20) and between the oil outlet channel (21).

2. The RV reducer with a grease nipple according to claim 1, characterized in that: The needle tooth shell (1) is also provided with a third oil passage (16), which is connected to the first oil passage (14) through the second oil passage (15). The oil outlet of the third oil passage (16) is located between the first cycloidal wheel (3) and the second cycloidal wheel (4).

3. An RV reducer with a grease nipple according to claim 2, characterized in that: The first oil passage (14) is inclined from the outside to the inside, with its oil inlet end far away from the first cycloidal wheel (3) and its oil outlet end close to the first cycloidal wheel (3).

4. An RV reducer with a grease nipple according to claim 3, characterized in that: The angle between the first oil passage (14) and the first cycloidal wheel (3) is 15°-30°.

5. An RV reducer with a grease nipple according to claim 4, characterized in that: A spacer (5) is provided between the first cycloidal wheel (3) and the second cycloidal wheel (4). The oil outlet of the third oil passage (16) avoids the pin tooth mounting groove of the pin tooth pin (2) on the inner wall of the pin tooth shell (1) and is located between adjacent pin tooth pins (2).

6. An RV reducer with a grease nipple according to claim 1, characterized in that: A step (101) is provided on the inner wall of the needle tooth shell (1), and the first bearing (11) and the second bearing (12) are restricted to the outside of the step (101).

7. An RV reducer with a grease nipple according to claim 6, characterized in that: An oil seal (13) is provided between the needle housing (1) and the output disk (10) on the outside of the second bearing (12).

8. An RV reducer with a grease nipple according to any one of claims 1-7, characterized in that: The grease nipple body (18) is a rotating body with cylindrical ends and an outer diameter smaller than the middle outer diameter. The oil inlet channel (19) and oil outlet channel (21) are cylindrical. The oil inlet channel (19) has the same diameter as one end of the main channel (20), and the oil outlet channel (21) has a smaller diameter than the other end of the main channel (20). The conical spring (24) is inserted into the main channel (20).

9. An RV reducer with a grease nipple according to claim 8, characterized in that: The ball (23) is fixed on the conical spring (24); the diameter of the ball (23) is larger than the diameter of the drain hole (2001) in the middle of the main channel (20); the oil inlet end of the grease nipple body (18) is provided with an external thread.

10. An RV reducer with a grease nipple according to claim 9, characterized in that: The butter nozzles are evenly arranged around the circumference of the needle shell (1).

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