CN219221168U - Improved roller speed reducer - Google Patents

Abstract

The utility model discloses an improved roller speed reducer, which relates to the technical field of speed reducers, and comprises a fixed seat, a planet wheel, an output wheel, a crossed roller group, a mounting seat and an input shaft, wherein a third roller is arranged in the input shaft, and both ends of the third roller are tapered; the outer part of the input shaft is sleeved with a planetary gear, and the surface of the planetary gear is fixedly connected with a second roller; the inner side of the input shaft is provided with a bearing sleeve, a fixed bearing is sleeved in an inner cavity of the bearing sleeve, and a ball bearing is arranged between the bearing sleeve and the fixed bearing. According to the improved roller speed reducer, the two ends of the third roller are arranged to be conical in a chamfering mode, so that the contact area between the two ends of the third roller and the bearing sleeve and the planet wheel is reduced, the friction force generated between the two ends of the third roller and other parts is reduced, the mechanical abrasion is effectively reduced, and the service life is prolonged.

Description

Improved roller speed reducer

Technical Field

The utility model relates to the technical field of speed reducers, in particular to an improved roller speed reducer.

Background

With the development of transmission technology, the field of mechanical transmission has put forward higher and higher requirements on the precision requirement, bearing capacity and service life of a speed reducer. The existing transmission speed change mechanism generally adopts gear transmission, turbine worm transmission, chain wheel and chain transmission and the like. The gearing may employ external or internal tooth engagement. The external teeth are meshed, the number of the meshed teeth is small, the transmission torque is generally increased only by increasing the modulus of the gear, and the mechanism required by large-speed-ratio output is large. The internal engagement adopts the principle of small tooth difference, and can simultaneously have multi-tooth engagement, but the interference of the internal and external teeth in the transmission restricts the number of the engagement teeth, and the ultra-large torque is difficult to output. The sprocket transmission adopts the meshing of sprocket and chain to transmit power, adopts the mode of many rows of chains, many rows of teeth, but its speed ratio is little, can't realize big speed ratio transmission.

The utility model patent with the application number of 201510217930.7 discloses a roller speed reducer, which comprises an eccentric sleeve, a planet wheel, an output wheel and a fixed seat, wherein the planet wheel is sleeved on the eccentric sleeve, the output wheel and the fixed seat are respectively sleeved at two ends of the planet wheel, the planet wheel is in transmission connection with the output wheel, a first roller is arranged between the planet wheel and the fixed seat, U-shaped grooves are formed in the outer side of the planet wheel and the inner side of the fixed seat, the number of the U-shaped grooves of the fixed seat is more than that of the second roller, and the number of the U-shaped grooves of the planet wheel is equal to that of the second roller. The roller speed reducer realizes the large-speed-ratio variable-speed transmission of the planet wheel and the eccentric shaft by combining the principle of small-tooth-difference gear transmission, so that the speed reducer has the advantages of small volume, large speed ratio, high speed-changing precision and high rigidity. The transmission ratio of the roller reducer is adjusted by changing the number of the first rollers, and the transmission of the torsion magnitude of the roller reducer is adjusted by changing the diameter magnitude of the first rollers. The first roller is arranged in the U-shaped groove of the fixing seat and the planet wheel, so that friction and collision of the radial acting force of the planet wheel and the fixing seat can be relieved.

However, after the technology is improved, certain defects still exist, firstly, the second roller is arranged between the planet wheel and the output wheel, the situation of falling and shifting easily occurs after long-time use, the end part of the third roller for supporting rotation is of a plane design, so that the friction is large, the two ends are easily worn greatly, the inner space of the whole roller speed reducer is basically free from gaps, lubricating oil cannot be reserved among various parts in a large amount, the used metal materials are more, and certain influence is caused on mass production, so that an improved roller speed reducer is provided on the basis of the technical scheme of the patent.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides an improved roller reducer, which solves the problems that the second roller provided in the background art is arranged between a planet wheel and an output wheel, is easy to fall off and shift after long-time use, and the end part of a third roller for supporting rotation is designed to be a plane, so that the friction is large, the two ends are easy to generate large abrasion, the inner space of the whole roller reducer basically has no gap, lubricating oil cannot be reserved among a large number of parts, and the used metal materials are also more, so that the mass production can be influenced to a certain extent.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: an improved roller speed reducer comprises a fixed seat, a planet wheel, an output wheel, a crossed roller group, a mounting seat and an input shaft, wherein a third roller is arranged in the input shaft, and both ends of the third roller are tapered;

the outer part of the input shaft is sleeved with a planetary gear, and the surface of the planetary gear is fixedly connected with a second roller;

the inner side of the input shaft is provided with a bearing sleeve, a fixed bearing is sleeved in an inner cavity of the bearing sleeve, and a ball bearing is arranged between the bearing sleeve and the fixed bearing.

Optionally, the output wheel cup joints in the outside of planet wheel, the post groove with second roller looks adaptation is seted up to the inner wall of output wheel.

Optionally, the outside of output wheel is installed and is crossed roller group, the externally mounted of output wheel has the mount pad, the bottom of mount pad is provided with the fixing base.

Optionally, the planet wheel and the second roller are integrally formed.

Optionally, the second roller is sleeved to the inner cavity of the column groove.

Optionally, grooves matched with the shapes of the third rollers are formed in the inner side of the planet wheel and the outer side of the bearing sleeve, and the two sides of the third rollers extend into the grooves in the planet wheel and the bearing sleeve respectively.

Optionally, a thread groove is formed in the inner wall of the fixed bearing.

The utility model provides an improved roller reducer, which has the following beneficial effects:

1. this modified roller reducer sets up the both ends of third roller into the taper shape through the mode that adopts the chamfer, and then keeps off the chamfer on ring and the planet wheel on the chamfer that keeps off the ring with the bearing housing at third roller both ends, forms 45 degrees angle contact between to form the rotating friction, and then reduce the frictional force that third roller both ends and other parts produced, effectually reduced mechanical wear, increase of service life.

2. According to the improved roller speed reducer, the planet wheel and the second roller are integrally formed and designed, so that the second roller is fixedly connected to the surface of the planet wheel, the material of the second roller can be reduced, the improved second roller is only half of the material used in the prior art, meanwhile, the second roller cannot be separated from the planet wheel, the stability of the improved second roller is greatly improved, meanwhile, the inner space of the whole roller speed reducer is increased through the matching of the planet wheel, the input shaft and the ball bearing, the small inner space style of the roller speed reducer in the traditional design is avoided, the processing material can be saved through the special large gap in the roller speed reducer, the production cost is reduced, the roller speed reducer has key significance for mass production and enterprise cost reduction, more lubricating substances can be added, more lubricating substances can be stored, the mechanical abrasion of the roller speed reducer is further reduced, and the service life is prolonged.

3. The screw thread groove is formed in the inner wall of the fixed bearing, so that when the fixed bearing is connected with the shaft to rotate, the screw thread groove can generate air flow to form air circulation, heat generated by friction is taken away, and the heat volatilization speed can be increased. Thus, the high fatigue wear of parts due to the temperature can be reduced, and the service life of the roller reducer can be prolonged.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is a schematic diagram of the input shaft of the present utility model;

FIG. 4 is a schematic diagram of a planet of the present utility model;

FIG. 5 is a schematic diagram of another embodiment of the present utility model;

fig. 6 is a schematic cross-sectional view of another embodiment of the present utility model.

In the figure: 1. a fixing seat; 2. a planet wheel; 3. an output wheel; 4. a set of intersecting rollers; 5. a mounting base; 6. a second roller; 7. a third roller; 8. an input shaft; 9. a ball bearing; 10. fixing a bearing; 11. a bearing sleeve; 12. column groove, 13, screw groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Embodiment one:

referring to fig. 1-4, the utility model provides an improved roller reducer, which comprises a fixed seat 1, a planet wheel 2, an output wheel 3, a crossed roller group 4, a mounting seat 5 and an input shaft 8, wherein a third roller 7 is arranged in the input shaft 8, both ends of the third roller 7 are conical by adopting a chamfering mode, grooves matched with the shape of the third roller 7 are formed in the inner side of the planet wheel 2 and the outer side of a bearing sleeve 11, both sides of the third roller 7 extend into the grooves in the planet wheel 2 and the bearing sleeve 11 respectively, the contact area between both ends of the third roller 7 and the bearing sleeve 11 and the planet wheel 2 is reduced, and further friction force generated between both ends of the third roller 7 and other parts is reduced, so that mechanical abrasion is effectively reduced, and the service life is prolonged.

Through forming 45 degrees angle contact between the chamfer baffle rings on the third roller 7 both ends and the bearing housing 11 and the chamfer baffle rings on the planet wheel 2, thereby forming rotating friction, and then reducing the friction force generated by the third roller 7 both ends and other parts, effectively reducing mechanical abrasion and prolonging the service life.

The outside of output wheel 3 is installed and is crossed roller group 4, and the outside of output wheel 3 is installed mount pad 5, and the bottom of mount pad 5 is provided with fixing base 1.

Embodiment two:

referring to fig. 1 to 4, the second embodiment differs from the first embodiment in that: the planet wheel 2 is sleeved outside the input shaft 8, and the surface of the planet wheel 2 is fixedly connected with a second roller 6.

The output wheel 3 is sleeved outside the planet wheel 2, and a column groove 12 matched with the second roller 6 is formed in the inner wall of the output wheel 3.

The second roller 6 is sleeved into the inner cavity of the column groove 12. The planet wheel 2 and the second roller 6 are integrally formed, and the planet wheel 2 and the second roller 6 are integrally formed, so that the second roller 6 is fixedly connected with the surface of the planet wheel 2, the material of the second roller 6 can be reduced, the improved second roller 6 is only half of the material used in the prior art, meanwhile, the second roller 6 cannot be separated from the planet wheel 2, and the stability of the planet wheel is greatly improved.

Embodiment III:

referring to fig. 1-2 and 5-6, the third embodiment differs from the first embodiment in that: the inboard of input shaft 8 is provided with bearing housing 11, and fixed bearing 10 has been cup jointed to the inner chamber of bearing housing 11, and installs ball bearing 9 between bearing housing 11 and the fixed bearing 10, changes the position of ball bearing on the traditional roller reduction gear, changes the overall arrangement of upper and lower both sides installation into with ball bearing 9 installation at whole roller reduction gear middle part.

Meanwhile, through the matching use of the planet gears 2, the input shaft 8 and the ball bearings 9, the inner space of the whole roller reducer is increased through special design layout, the roller reducer is not in a small inner space style of the roller reducer which is designed conventionally any more, processing materials can be saved through special large gaps in the roller reducer, production cost is reduced, the roller reducer has key significance for mass production and enterprise cost reduction, more lubricating substances can be added into the inner space, more lubricating substances can be stored, mechanical abrasion of the roller reducer is further reduced, and service life is prolonged.

Because the inner wall of the fixed bearing 10 is hollow, the inner wall of the fixed bearing 10 is provided with the thread groove 13, when the fixed bearing 10 is connected with a shaft for rotation, the thread groove 13 can generate air flow to form air circulation, heat generated by friction is taken away, and the heat volatilization speed can be accelerated. Therefore, fatigue abrasion of parts due to overhigh temperature is reduced, and the service life of the roller speed reducer can be prolonged.

The last points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed;

secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other under the condition of no conflict;

finally: the foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims (7)

1. An improved roller reducer, comprising a fixed seat (1), characterized in that: the novel planetary gear transmission device is characterized by further comprising a planetary gear (2), an output gear (3), a crossed roller group (4), a mounting seat (5) and an input shaft (8), wherein a third roller (7) is arranged in the input shaft (8), and two ends of the third roller (7) are tapered;

the planetary gear (2) is sleeved outside the input shaft (8), and a second roller (6) is fixedly connected to the surface of the planetary gear (2);

the inner side of the input shaft (8) is provided with a bearing sleeve (11), a fixed bearing (10) is sleeved in an inner cavity of the bearing sleeve (11), and a ball bearing (9) is arranged between the bearing sleeve (11) and the fixed bearing (10).

2. An improved roller reducer as defined in claim 1, wherein: the output wheel (3) is sleeved outside the planet wheel (2), and a column groove (12) matched with the second roller (6) is formed in the inner wall of the output wheel (3).

3. An improved roller reducer as defined in claim 1, wherein: the output wheel (3) is provided with a crossed roller group (4) on the outer side, the output wheel (3) is provided with a mounting seat (5) on the outer side, and the bottom of the mounting seat (5) is provided with a fixing seat (1).

4. An improved roller reducer as defined in claim 1, wherein: the planet wheel (2) and the second roller (6) are integrally formed.

5. An improved roller reducer according to claim 2, wherein: the second roller (6) is sleeved on the inner cavity of the column groove (12).

6. An improved roller reducer as defined in claim 1, wherein: grooves matched with the shapes of the third rollers (7) are formed in the inner side of the planet wheel (2) and the outer side of the bearing sleeve (11), and the two sides of the third rollers (7) extend into the grooves of the planet wheel (2) and the bearing sleeve (11) respectively.

7. An improved roller reducer as defined in claim 1, wherein: a thread groove (13) is formed in the inner wall of the fixed bearing (10).

Images