CN211975833U

CN211975833U - Totally-enclosed hollow RV speed reducer

Info

Publication number: CN211975833U
Application number: CN202020455384.7U
Authority: CN
Inventors: 纪仕飞; 顾京君
Original assignee: NANTONG ZHENKANG MACHINERY CO Ltd; Nantong Zhenkang Welding Electromachinery Co ltd
Current assignee: NANTONG ZHENKANG MACHINERY CO Ltd; Nantong Zhenkang Welding Electromachinery Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-11-20
Anticipated expiration: 2030-03-31

Abstract

The utility model provides a fully-sealed hollow RV reducer, relating to the technical field of RV reducers, comprising a pin gear shell, an output shaft, a sealing flange, a second input shaft and a through pipe; the sealing flange is fixed on the through hole of the pin gear shell, the wire passing pipe is fixed on the output shaft, and a first O-shaped sealing ring is arranged between the wire passing pipe and the output shaft; the second input shaft is a hollow type, the wire passing pipe is arranged in the second input shaft in a penetrating mode, and a first framework sealing ring is arranged between the second input shaft and the wire passing pipe. The volume and the weight of the utility model are increased by only 10 percent to 15 percent, and the characteristics of small volume and light weight of the speed reducer are maintained; when the cable is used, the second input shaft and the belt pulley are connected only by using screws, the belt is installed after the motor is fixed, and the cable penetrates through the cable passing pipe, so that the cable is very simple to install; the fully-sealed hollow RV speed reducer is oil-tight and oil-tight in normal operation, the body of the fully-sealed hollow RV speed reducer is filled with grease, the grease does not need to be added and replaced, and the maintenance of the speed reducer is omitted.

Description

Totally-enclosed hollow RV speed reducer

Technical Field

The utility model relates to a RV speed reducer technical field especially relates to a cavity type RV speed reducer in totally enclosed formula.

Background

The RV speed reducer is a novel speed reducer developed on the basis of cycloidal pin gear transmission, has the advantages of high rigidity, high precision, large torque, high transmission efficiency and the like, and has smaller volume and larger overload capacity compared with simple cycloidal pin gear planetary transmission. In the transmission mechanism of the japanese robot, the RV reducer has gradually replaced pure cycloidal-pin planetary transmission and harmonic transmission to a great extent.

The hollow RV reducer is an RV reducer having a hollow structure, and is mainly composed of a pin gear case 01, a cycloid gear 08, an eccentric shaft 03, and the like, as shown in fig. 1. When the speed reducer is used, grease is required to be filled for lubricating a transmission mechanism, and the grease flows to the outside of the speed reducer from gaps among the angular contact ball bearing 07, the cycloid wheel 08, the output shaft 03, the output shaft cover 09 and gaps among the planet wheel 011 and the duplicate gear 010 respectively. Two problems are brought about when the speed reducer is used: firstly, a cavity capable of sealing grease is required to be designed for mounting the speed reducer; and secondly, the servo motor is convenient to install in the cavity designed according to the requirement. Therefore, what is needed is a fully sealed hollow RV reducer that solves the above problems and achieves grease sealing.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cavity type RV speed reducer in totally enclosed formula, its size is little, light in weight, uses the belt pulley to fix on the gear shaft during installation to connect the motor through the belt, need not to consider that the grease is sealed, add and change, install very simply and need not to maintain.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a fully-sealed hollow RV reducer comprises a pin gear shell, an output shaft, a sealing flange, a second input shaft and a through pipe; the sealing flange is fixed on the through hole of the pin gear shell, the pipeline is fixed on the output shaft, and a first O-shaped sealing ring is arranged between the pipeline and the output shaft; the second input shaft is the cavity type, just the spool wears to establish in the second input shaft, install first skeleton seal circle between second input shaft and the spool.

Through adopting above-mentioned technical scheme, when the totally enclosed formula cavity type RV speed reducer was used, the second input shaft was connected with actuating mechanism, the cable from the wire tube pass can, the installation is very simple and convenient. Under the sealing action of the first O-shaped sealing ring and the first framework sealing ring, grease in the inner cavity of the speed reducer is prevented from flowing outwards, and the fully-sealed hollow RV speed reducer is ensured to be oil-tight and oil-tight in normal operation; and because the totally enclosed formula cavity type RV speed reducer body has been filled with grease, so need not add and change the grease again during the use, remove the maintenance to the speed reducer from.

Furthermore, a second O-shaped sealing ring for sealing the end face is arranged between the sealing flange and the pin gear shell.

Through adopting above-mentioned technical scheme, the second O type sealing washer carries out end face seal to between sealing flange and the pin gear shell, and the sealed effect when further guaranteeing the use of totally enclosed formula cavity type RV speed reducer avoids taking place oil leak, oil impregnate phenomenon, and its simple structure, the effect is obvious.

Furthermore, a deep groove ball bearing is arranged between the sealing flange and the second input shaft, and a second framework sealing ring is arranged on the outer side of the deep groove ball bearing.

Through adopting above-mentioned technical scheme, deep groove ball bearing not only can bear great load, can play certain dustproof grease proofing function moreover, and second skeleton seal circle can further guarantee sealed effect, prevents that the grease from overflowing from deep groove ball bearing, plays fine sealed effect, and its simple structure and effect are obvious.

Furthermore, a plurality of screw holes are formed in the end face, far away from the output shaft, of the second input shaft, and the axial direction of each screw hole is the same as that of the second input shaft.

Through adopting above-mentioned technical scheme, when the input installation drive motor, use with screw complex screw fixed belt pulley on the second input shaft, use belt connection belt pulley and drive motor, realize the transmission between drive motor and the second input shaft and be connected, convenient saving trouble. And the belt pulley passes through the screw installation on the second input shaft, when needing to obtain different reduction ratio, only need change the different belt pulleys of external diameter can, flexible operation and simple.

Furthermore, a plurality of tension springs arranged along the radial direction of the first O-shaped sealing ring and/or the second O-shaped sealing ring are arranged in the inner circumference array of the first O-shaped sealing ring and/or the second O-shaped sealing ring, and the tension springs are embedded in the first O-shaped sealing ring and/or the second O-shaped sealing ring.

Through adopting above-mentioned technical scheme, inlay the tension spring who establishes in first O type sealing washer and/or second O type sealing washer and exert along its radial extrusion force to first O type sealing washer and/or second O type sealing washer, effectively improve the life and the sealed effect of first O type sealing washer and/or second O type sealing washer, its simple structure and effect are obvious.

Further, the first O-shaped sealing ring and/or the second O-shaped sealing ring are ethylene propylene diene monomer sealing rings.

By adopting the technical scheme, the ethylene propylene diene monomer sealing ring has the advantages of excellent aging resistance, corrosion resistance, high elasticity and the like, and the service life and the use effect can be effectively ensured by using the ethylene propylene diene monomer sealing ring as the first O-shaped sealing ring and/or the second O-shaped sealing ring, so that the service life of the whole fully-sealed hollow RV reducer is prolonged, and the effect is obvious.

Further, the outer wall of the first framework sealing ring is annularly provided with an outer flange, and the inner wall of the second input shaft is provided with an inner ring groove matched with the outer flange.

Through adopting above-mentioned technical scheme, under the block effect of outer flange and inner ring groove, effectively improve the leakproofness between first skeleton seal circle and the second input shaft, avoid taking place oil leak, oil seepage phenomenon, and then guarantee the holistic life and the result of use of totally enclosed cavity type RV speed reducer, its simple structure, easy to assemble and effect are obvious.

Furthermore, an inner flange is annularly arranged on the inner wall of the first framework sealing ring, and an outer ring groove matched with the inner flange is arranged on the outer wall of the through pipe.

Through adopting above-mentioned technical scheme, under the block effect of inner flange and outer annular groove, effectively improve the leakproofness between first skeleton seal circle and the lead wire pipe, avoid taking place oil leak, oil seepage phenomenon, and then guarantee holistic life and the result of use of totally enclosed formula cavity RV speed reducer, its simple structure, easy to assemble and effect are obvious.

To sum up, the utility model discloses following beneficial effect has:

1. during installation, the fully-sealed hollow RV reducer is connected with the second input shaft and the belt pulley only by using screws, a belt is installed after the motor is fixed, and a cable passes through the cable tube, so that the installation is very simple;

2. when the fully-sealed hollow RV speed reducer is in operation, the fully-sealed hollow RV speed reducer does not leak and seep oil in normal operation;

3. when the fully-sealed type hollow RV speed reducer is normally used, the body of the fully-sealed type hollow RV speed reducer is filled with grease, and the grease does not need to be added and replaced, so that the maintenance of the speed reducer is avoided;

4. different reduction ratios are obtained according to the use requirements, and the belt pulleys with different outer diameters can be replaced, so that the operation is flexible and simple;

5. the volume and the weight of the fully-sealed hollow RV reducer are increased by only 10-15%, and the characteristics of small volume and light weight of the reducer are maintained.

Drawings

Fig. 1 is a schematic overall structure diagram of a hollow RV reducer in the prior art;

FIG. 2 is a schematic diagram of the overall structure of a fully sealed hollow RV reducer;

FIG. 3 is an enlarged view of portion A and portion B of FIG. 2;

fig. 4 is an enlarged view of a portion C in fig. 2.

In the figure, 01, a needle gear shell; 02. a skeleton sealing ring; 03. an output shaft; 04. an eccentric shaft; 05. oil sealing; 06. a tapered roller bearing; 07. angular contact ball bearings; 08. a cycloid wheel; 09. an output shaft cover; 010. a duplicate gear; 011. a planet wheel; 012. a first input shaft; 11. a second O-ring seal; 12. sealing the flange; 121. a first screw; 13. a deep groove ball bearing; 14. a second skeleton sealing ring; 15. a second input shaft; 151. a screw hole; 152. an inner ring groove; 16. a first skeleton seal ring; 161. an outer flange; 162. an inner flange; 17. a first O-ring seal; 171. a cavity; 172. a tension spring; 18. a through pipe; 181. an outer ring groove; 182. a second screw.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

A fully-sealed hollow RV reducer is shown in figures 1 and 2 and comprises a needle gear shell 01, a framework sealing ring 02, an output shaft 03, an eccentric shaft 04, an oil seal 05, a tapered roller bearing 06, an angular contact ball bearing 07, a cycloid wheel 08, an output shaft 03 cover, a planet wheel 011 and the like, wherein the basic structure of the fully-sealed hollow RV reducer is the same as that of the hollow RV reducer in figure 1, and redundant description is omitted for the prior art. As shown in fig. 2, different from the hollow RV reducer in fig. 1, the fully-sealed hollow RV reducer of the present invention further includes a second O-ring 11, a sealing flange 12, a deep groove ball bearing 13, a second skeleton sealing ring 14, a second input shaft 15, a first skeleton sealing ring 16, a first O-ring 17, and a through pipe 18. Wherein, the second input shaft 15 is hollow, the through-wire tube 18 is arranged in the second input shaft 15 for the cable to pass through, and the through-wire tube 18 is fixedly arranged on the output shaft 03 through the second screw 182,

as shown in fig. 2, the sealing flange 12 is fixed to the through hole of the pin gear housing 01 by a first screw 121, and a second O-ring 11 for sealing the end face of the sealing flange 12 is installed between the sealing flange 12 and the pin gear housing 01, so as to ensure the sealing performance between the sealing flange 12 and the pin gear housing 01. A deep groove ball bearing 13 is arranged between the sealing flange 12 and the second input shaft 15, and a second framework sealing ring 14 is arranged on one side, far away from the output shaft 03, of the deep groove ball bearing 13, so that grease is prevented from overflowing from the deep groove ball bearing 13, and a good sealing effect is achieved. A first skeleton seal 16 is installed between the second input shaft 15 and the through pipe 18, and the first skeleton seal 16 seals grease to prevent the grease in the inner cavity such as the cycloid gear 08 from flowing out. And a first O-shaped sealing ring 17 is further installed between the through pipe 18 and the output shaft 03 for sealing, and grease in the inner cavity of the speed reducer is prevented from flowing outwards in the same way.

As shown in fig. 2, in the present embodiment, the first O-ring 17 and the second O-ring 11 are both epdm rubber sealing rings, which have excellent aging resistance, corrosion resistance and high elasticity, and effectively ensure the sealing effect of the first O-ring 17 and the second O-ring 11 when in use. In addition, as shown in fig. 2 and 3, a plurality of cavities 171 are circumferentially arranged in an array in each of the first O-ring 17 and the second O-ring 11, and a tension spring 172 is embedded in each cavity 171 and radially arranged along the O-ring. Under tension spring 172's tension effect, effectively guarantee first O type sealing washer 17 and second O type sealing washer 11's sealing performance, improve its life, guarantee promptly the utility model discloses a life and result of use.

In this embodiment, in order to ensure the sealing effect of the first skeleton seal 16 on the communication pipe 18 and the second input shaft 15, as shown in fig. 2 and 4, an outer flange 161 is annularly provided on the outer wall of the first skeleton seal 16, an inner flange 162 is annularly provided on the inner wall, an inner annular groove 152 is provided on the inner wall of the second input shaft 15 to be engaged with the outer flange 161, and an outer annular groove 181 is provided on the outer wall of the communication pipe 18 to be engaged with the inner flange 162. Thus, under the clamping action of the outer flange 161 and the inner annular groove 152 and the clamping action of the inner flange 162 and the outer annular groove 181, the sealing effect of the first framework sealing ring 16 can be effectively improved, and oil leakage and oil seepage can be avoided.

In order to facilitate connection between the input end and the transmission motor, as shown in fig. 2 and 4, a plurality of screw holes 151 are provided on an end surface of the second input shaft 15 away from the output shaft 03, and an axial direction of the screw holes 151 is the same as an axial direction of the second input shaft 15. When input installation drive motor, use with screw 151 complex screw fixed belt pulley on second input shaft 15, use belt connection belt pulley and drive motor, realize the transmission between drive motor and the second input shaft 15 and connect, it is extremely convenient. When different reduction ratios are required, only the belt pulleys with different outer diameters need to be replaced, and the operation is flexible and simple.

The utility model discloses a theory of operation and application method:

the full sealing of the hollow RV reducer is realized under the sealing action of the first O-shaped sealing ring 17, the second O-shaped sealing ring 11, the first skeleton sealing ring 16, the second skeleton sealing ring 14, the sealing flange 12 and the like. Because the totally-sealed hollow RV speed reducer body is filled with grease, the grease does not need to be added and replaced, and the maintenance of the speed reducer is avoided; and the phenomena of oil leakage and oil seepage can not occur during operation and use, thereby being convenient for users to use. Meanwhile, when the transmission motor is installed at the input end, only the belt wheel is fixed by using screws to install the belt, and when different reduction ratios are required, only the belt wheel with different outer diameters is required to be replaced.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the invention as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a totally enclosed cavity type RV speed reducer, includes pin gear shell (01) and output shaft (03), its characterized in that: the sealing flange (12), the second input shaft (15) and the through pipe (18) are further included; the sealing flange (12) is fixed on a through hole of the needle gear shell (01), the through pipe (18) is fixed on the output shaft (03), and a first O-shaped sealing ring (17) is arranged between the through pipe (18) and the output shaft (03); second input shaft (15) are the cavity type, just in second input shaft (15) are worn to establish in through line pipe (18), install first skeleton sealing washer (16) between second input shaft (15) and through line pipe (18).

2. The fully-sealed hollow RV reducer according to claim 1, characterized in that: and a second O-shaped sealing ring (11) for sealing the end face is arranged between the sealing flange (12) and the needle gear shell (01).

3. The fully-sealed hollow RV reducer according to claim 2, characterized in that: be equipped with deep groove ball bearing (13) between sealing flange (12) and second input shaft (15), the deep groove ball bearing (13) outside is equipped with second skeleton sealing washer (14).

4. The fully-sealed hollow RV reducer according to any of claims 1-3, characterized in that: and a plurality of screw holes (151) are formed in the end face, far away from the output shaft (03), of the second input shaft (15), and the axial direction of each screw hole (151) is the same as that of the second input shaft (15).

5. The fully-sealed hollow RV reducer according to claim 2, characterized in that: the inner circumference array of the first O-shaped sealing ring (17) and/or the second O-shaped sealing ring (11) is provided with a plurality of tension springs (172) arranged along the radial direction of the first O-shaped sealing ring and/or the second O-shaped sealing ring, and the tension springs (172) are embedded in the first O-shaped sealing ring (17) and/or the second O-shaped sealing ring (11).

6. The fully-sealed hollow RV reducer according to claim 2 or 5, characterized in that: the first O-shaped sealing ring (17) and/or the second O-shaped sealing ring (11) are ethylene propylene diene monomer sealing rings.

7. The fully-sealed hollow RV reducer according to claim 1, characterized in that: the outer wall of the first framework sealing ring (16) is annularly provided with an outer flange (161), and the inner wall of the second input shaft (15) is provided with an inner ring groove (152) matched with the outer flange (161).

8. The fully-sealed hollow RV reducer according to claim 7, characterized in that: an inner flange (162) is annularly arranged on the inner wall of the first framework sealing ring (16), and an outer ring groove (181) matched with the inner flange (162) is arranged on the outer wall of the through pipe (18).