CN221097354U

CN221097354U - Medical RV speed reducer

Info

Publication number: CN221097354U
Application number: CN202323237127.9U
Authority: CN
Inventors: 邓勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-11-28
Filing date: 2023-11-28
Publication date: 2024-06-07
Anticipated expiration: 2033-11-28

Abstract

The utility model provides a medical RV reducer, which comprises an output flange, a sun gear arranged at the center of the output flange, and a planet wheel arranged inside the output flange and surrounding the sun gear, wherein a gear ring is integrally formed at the inner side of the output flange, the planet wheel is simultaneously meshed with the sun gear and the gear ring, the sun gear comprises a mandrel and a tooth sleeve sleeved at the outer side of the mandrel, a connecting spline is integrally formed at the outer side of the mandrel, a spline groove is formed at the inner side of the tooth sleeve, the connecting spline is embedded in the spline groove, a fixed baffle is integrally formed at the rear end of the mandrel and is abutted against the rear end of the tooth sleeve, a movable baffle is connected at the front end of the mandrel in a threaded manner, and the movable baffle is abutted against the front end of the tooth sleeve. When the sun gear is broken, a user only needs to reversely rotate the movable baffle, so that the movable baffle can be separated from the top of the mandrel, and the tooth sleeve with the gear teeth arranged on the outer side can be replaced. The replacement of the entire sun gear by the replacement of the toothed sleeve reduces the material consumption.

Description

Medical RV speed reducer

Technical Field

The utility model relates to a speed reducer, in particular to a medical RV speed reducer.

Background

Currently, chinese patent publication No. CN210265739U discloses an RV reducer, which includes a sun gear and planetary gears meshed with the sun gear, where the planetary gears are distributed around the sun gear along a circumferential direction of the sun gear. The RV reducer further comprises an input shaft, and the input shaft and the sun gear are of an integrated structure. The RV reducer further comprises a crankshaft, the planet gears are connected with the corresponding crankshaft, and the planet gears and the crankshaft are of split structures. The planet wheel is provided with meshing internal teeth, the circumferential side surface of the crankshaft is provided with meshing external teeth, and the meshing internal teeth are matched with the meshing external teeth so as to realize connection of the planet wheel and the corresponding crankshaft. However, when the RV reducer is used in the european and american market, the strength of the euler is generally slightly high and the force is often output violently, so that the teeth of the sun gear are likely to be broken. After the gear teeth of the sun gear are broken, maintenance personnel need to detach and replace the whole sun gear, and the defect of more material waste exists.

Disclosure of Invention

In view of this, it is an object of the present utility model to provide a medical RV retarder having the advantage of less material consumption in the repair of damaged sun gears.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides a medical RV speed reducer, is in including output flange, setting output flange central point put the sun gear, setting are in output flange is inside and around the planet wheel of sun gear, output flange's inboard integrated into one piece has the ring gear, the planet wheel mesh simultaneously in the sun gear with the ring gear, the sun gear includes the dabber, overlaps to be established the tooth cover in the dabber outside, the outside integrated into one piece of dabber has the connection spline, spline groove has been seted up to the inboard of tooth cover, the connection spline is inlayed and is established in the spline groove, the rear end integrated into one piece of dabber has fixed stop, fixed stop with the rear end of tooth cover offsets and contacts, the front end threaded connection of dabber has movable baffle, movable baffle with the front end of tooth cover offsets tightly.

Through the technical scheme, when the gear teeth on the outer side of the sun gear are broken, a user only needs to reversely rotate the movable baffle, so that the movable baffle can be separated from the top of the mandrel, and the gear sleeve with the gear teeth on the outer side can be replaced. The replacement of the entire sun gear by the replacement of the toothed sleeve reduces the material consumption. The connecting spline arranged on the outer side of the mandrel is matched with the spline groove arranged on the inner side of the tooth sleeve, so that the circumferential relative rotation between the mandrel and the rack can be limited, and the transmission efficiency between the mandrel and the tooth sleeve can be effectively improved. The fixed baffle is matched with the movable baffle, so that the axial sliding of the tooth sleeve can be limited, and the sun gear can normally operate.

Preferably, the height of the connecting spline is gradually reduced from the front end of the output flange to the rear end of the output flange, and the groove depth of the spline groove is gradually reduced from the front end of the output flange to the rear end of the output flange.

Through the technical scheme, the height of the connecting spline is gradually reduced from the front end of the output flange to the rear end of the output flange, the groove depth of the spline groove is gradually reduced from the front end of the output flange to the rear end of the output flange, so that the connecting spline can be conveniently inserted into the spline groove when the mandrel is combined with the tooth sleeve, and the gap between the connecting spline and the spline groove is gradually reduced along with continuous deep penetration of the connecting spline, and when the outer side of the connecting spline is completely abutted against the inner side of the spline groove, the mandrel and the tooth sleeve are combined. Along with the continuous spline groove that stretches into of connecting spline, connecting spline and spline groove can constantly correct the relative position of dabber and tooth cover for the combined process of dabber and rack becomes more convenient and swift.

Preferably, the rear end of the connecting spline is provided with a first chamfer, the rear end of the spline groove is provided with a second chamfer, and a welding seam is formed between the first chamfer and the second chamfer through welding.

Through the technical scheme, the connection strength between the mandrel and the tooth sleeve is further improved through the welding seam. And when the gear needs to be replaced, the limiting effect of the welding seam on the mandrel and the tooth sleeve can be relieved only by heating the welding seam. The welding seam is located between the first chamfer and the second chamfer, so that the welding seam is high in strength and can be connected with the mandrel and the tooth sleeve more effectively.

Preferably, the rear end of the movable baffle is provided with a storage ring groove, and the welding seam is protruded and extends into the storage ring groove.

Through above-mentioned technical scheme, the welding seam of so setting not only can be with dabber and tooth cover stable connection, still be difficult for causing the influence to the assembly process of sun gear.

Preferably, a front end ring groove is formed in the inner side of the front end of the output flange, a front end snap spring is arranged in the front end ring groove and is in contact with the front end of the sun gear, a rear end ring groove is formed in the inner side of the rear end of the output flange, a rear end snap spring is arranged in the rear end ring groove, and the rear end snap spring is in contact with the rear end of the sun gear.

Through above-mentioned technical scheme, front end jump ring and rear end jump ring mutually support, can stabilize spacingly to the sun gear for be difficult for taking place axial relative movement between sun gear and the output flange.

Preferably, the connecting spline is far away from the end part of the fixed baffle plate and is provided with a first L-shaped connecting groove, the first L-shaped connecting groove penetrates through the outer wall of the connecting spline, the tooth sleeve is far away from the end part of the fixed baffle plate and is provided with a second L-shaped connecting groove, the second L-shaped connecting groove penetrates through the inner wall of the tooth sleeve and is communicated with the first L-shaped connecting groove, the connecting plate further comprises a connecting sheet, and two ends of the connecting sheet are respectively clamped and arranged in the first L-shaped connecting groove and the second L-shaped connecting groove.

Through above-mentioned technical scheme, the connection piece can carry out spacing with dabber and tooth cover, and then further promotes the joint strength between dabber and the tooth cover.

Preferably, the direction of the first L-shaped connecting groove is opposite to the direction of the second L-shaped connecting groove.

Through above-mentioned technical scheme, the orientation of L type spread groove is opposite with the orientation of L type spread groove two, so be difficult for taking place circumference relative rotation between dabber and the tooth cover.

Drawings

FIG. 1 is a schematic diagram of an embodiment;

FIG. 2 is a schematic structural view of a sun gear;

fig. 3 is an enlarged view of a portion a of fig. 2;

Fig. 4 is a partial schematic view of a sun gear.

Reference numerals: 1. an output flange; 2. a sun gear; 21. a mandrel; 22. a tooth sleeve; 3. a planet wheel; 4. a gear ring; 5. a connecting spline; 6. spline grooves; 7. a fixed baffle; 8. a movable baffle; 9. chamfering I; 10. chamfering II; 11. welding seams; 12. a storage ring groove; 13. a front ring groove; 14. a front end clamp spring; 15. a rear end ring groove; 16. a rear end clip spring; 17. an L-shaped connecting groove I; 18. an L-shaped connecting groove II; 19. and a connecting sheet.

Detailed Description

The following detailed description of the utility model is provided in connection with the accompanying drawings to facilitate understanding and grasping of the technical scheme of the utility model.

A medical RV reducer, as shown in figures 1 to 4, comprises an output flange 1, a sun gear 2 arranged at the center of the output flange 1, and a planet gear 3 arranged inside the output flange 1 and surrounding the sun gear 2. The inner side of the output flange 1 is integrally formed with a gear ring 4, and the planet gears 3 are simultaneously meshed with the sun gear 2 and the gear ring 4.

The sun gear 2 comprises a mandrel 21 and a tooth sleeve 22 sleeved outside the mandrel 21. The outer side of the mandrel 21 is integrally formed with a connecting spline 5, and the height of the connecting spline 5 gradually decreases from the front end of the output flange 1 to the rear end of the output flange 1. The spline grooves 6 are formed in the inner side of the tooth sleeve 22, and the groove depth of the spline grooves 6 gradually decreases from the front end of the output flange 1 to the rear end of the output flange 1. The connecting spline 5 is embedded in the spline groove 6, and when the outer wall of the connecting spline 5 is tightly attached to the inner wall of the spline groove 6, the front end and the rear end of the connecting spline 5 are respectively flush with the front end and the rear end of the spline groove 6.

The rear end of the connecting spline 5 is provided with a first chamfer 9, the rear end of the spline groove 6 is provided with a second chamfer 10, and a welding seam 11 is formed between the first chamfer 9 and the second chamfer 10 through welding and is used for fixing the mandrel 21 and the tooth sleeve 22.

An L-shaped connecting groove I17 is formed in the end portion, far away from the fixed baffle 7, of the connecting spline 5, and the L-shaped connecting groove I17 penetrates through the outer wall of the connecting spline 5. The end of the tooth sleeve 22 far away from the fixed baffle 7 is provided with an L-shaped connecting groove II 18, and the L-shaped connecting groove II 18 penetrates through the inner wall of the tooth sleeve 22 and is communicated with the L-shaped connecting groove I17. In this embodiment, the first L-shaped connecting slot 17 is oriented opposite to the second L-shaped connecting slot 18. The connecting piece 19 is also included, and two ends of the connecting piece 19 are respectively clamped in the first L-shaped connecting groove 17 and the second L-shaped connecting groove 18.

The rear end of the mandrel 21 is integrally formed with a fixed baffle 7, and the fixed baffle 7 is abutted against the rear end of the tooth sleeve 22. The front end of the mandrel 21 is connected with a movable baffle plate 8 in a threaded manner, and the movable baffle plate 8 is abutted against the front end of the tooth sleeve 22. The rear end of the movable baffle plate 8 is provided with a storage ring groove 12, and the welding line 11 protrudes and stretches into the storage ring groove 12.

The front end annular groove 13 is formed in the inner side of the front end of the output flange 1, the front end annular groove 13 is provided with the front end clamping spring 14, the front end clamping spring 14 is abutted against the front end of the sun gear 2, the rear end annular groove 15 is formed in the inner side of the rear end of the output flange 1, the rear end clamping spring 16 is arranged in the rear end annular groove 15, and the rear end clamping spring 16 is abutted against the rear end of the sun gear 2.

Of course, the above is only a typical example of the utility model, and other embodiments of the utility model are also possible, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of the utility model claimed.

Claims

1. The utility model provides a medical RV speed reducer, includes output flange (1), sets up sun gear (2) of output flange (1) central point put, set up output flange (1) is inside and around planet wheel (3) of sun gear (2), the inboard integrated into one piece of output flange (1) has ring gear (4), planet wheel (3) simultaneously mesh in sun gear (2) and ring gear (4), characterized by: sun gear (2) are in including dabber (21), cover tooth cover (22) in dabber (21) outside, the outside integrated into one piece of dabber (21) has connecting spline (5), spline groove (6) have been seted up to the inboard of tooth cover (22), connecting spline (5) are inlayed and are established in spline groove (6), the rear end integrated into one piece of dabber (21) has fixed stop (7), fixed stop (7) with the rear end of tooth cover (22) is in contact, the front end threaded connection of dabber (21) has movable baffle (8), movable baffle (8) with the front end of tooth cover (22) is in tight contact.

2. The medical RV reducer of claim 1, wherein: the height of the connecting spline (5) gradually decreases from the front end of the output flange (1) to the rear end of the output flange (1), and the groove depth of the spline groove (6) gradually decreases from the front end of the output flange (1) to the rear end of the output flange (1).

3. The medical RV reducer of claim 1, wherein: the rear end of the connecting spline (5) is provided with a first chamfer (9), the rear end of the spline groove (6) is provided with a second chamfer (10), and a welding seam (11) is formed between the first chamfer (9) and the second chamfer (10) through welding.

4. A medical RV speed reducer according to claim 3, characterized in that: the rear end of the movable baffle plate (8) is provided with a storage ring groove (12), and the welding seam (11) protrudes and stretches into the storage ring groove (12).

5. The medical RV reducer of claim 1, wherein: front end annular groove (13) has been seted up to the front end inboard of output flange (1), be provided with front end clamping spring (14) in front end annular groove (13), front end clamping spring (14) with the front end of sun gear (2) is in contact, rear end annular groove (15) has been seted up to the rear end inboard of output flange (1), be provided with rear end clamping spring (16) in rear end annular groove (15), rear end clamping spring (16) with the rear end of sun gear (2) is inconsistent.

6. The medical RV reducer of claim 1, wherein: the connecting spline (5) is far away from the end of the fixed baffle (7) is provided with an L-shaped connecting groove I (17), the L-shaped connecting groove I (17) penetrates through the outer wall of the connecting spline (5), the tooth sleeve (22) is far away from the end of the fixed baffle (7) is provided with an L-shaped connecting groove II (18), the L-shaped connecting groove II (18) penetrates through the inner wall of the tooth sleeve (22) and is communicated with the L-shaped connecting groove I (17), the connecting plate also comprises a connecting sheet (19), and two ends of the connecting sheet (19) are respectively clamped in the L-shaped connecting groove I (17) and the L-shaped connecting groove II (18).

7. The medical RV reducer of claim 6, wherein: the direction of the L-shaped connecting groove I (17) is opposite to the direction of the L-shaped connecting groove II (18).