CN210461550U

CN210461550U - Small worm gear speed reducer

Info

Publication number: CN210461550U
Application number: CN201920655193.2U
Authority: CN
Inventors: 王来继
Original assignee: Wang Laiji
Current assignee: Wang Laiji
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-05-05
Anticipated expiration: 2029-05-08

Abstract

The utility model provides a small-size worm gear speed reducer machine relates to speed reducer technical field, has solved the technical problem that the processing of small-size speed reducer machine who uses on ectoskeleton robot and various robotic arm is complicated, the cost is high. The small worm and gear speed reducer comprises an output assembly and an input assembly, wherein the output assembly is in transmission connection with equipment to be driven, and the input assembly is in transmission connection with a driving device; the speed reduction assembly is arranged between the output assembly and the input assembly and used for reducing the rotating speed of the driving device to the required rotating speed and then transmitting the rotating speed to the output assembly, and the speed reduction assembly can perform 90-degree rotation twice on the transmission direction of the driving device; the speed reduction assembly comprises a driving bevel gear, a worm bevel gear pair, a turbine straight gear pair and an inner gear ring. The utility model has the characteristics of small, the weight is light, simple structure, cost are low.

Description

Small worm gear speed reducer

Technical Field

The utility model belongs to the technical field of the speed reducer technique and specifically relates to a small-size worm gear speed reducer is related to.

Background

The reducer is an independent part consisting of gear transmission, worm transmission and gear-worm transmission enclosed in a rigid shell, and is commonly used as a speed reduction transmission device between a prime mover and a working machine. The function of matching the rotation speed and transmitting the torque between the prime mover and the working machine or the actuating mechanism is very extensive in modern machinery.

The applicant has found that the prior art has at least the following technical problems:

the speed reducer on the market at present has various defects and deficiencies, such as:

(1) large size and heavy weight (not used on small equipment, such as exoskeleton robot)

Most of the speed reducers on the market at present are large in size and heavy in weight, and cannot be used or are used in a compromise mode in the field of a plurality of mechanical devices (particularly portable devices), so that the size of the devices is increased, and the appearance of the devices is heavy; the reducer is larger in size under a large transmission ratio range.

(2) Small size, high cost, complex processing and high requirements for technology and equipment

In China, a plurality of devices also use speed reducers with small volume (such as harmonic speed reducers, planetary gear speed reducers and the like), but the devices have complicated structures, high manufacturing cost and high cost, are sold to markets by thousands of yuan or even ten thousand yuan, have high prices naturally, and the speed reducers used on some high-end devices are imported.

(3) Single structure of anti-reversion (90 degree structure is not applicable in some fields)

a. Turbine worm anti-reversion

At present, most of anti-reverse speed reducers are of a worm and gear structure, and due to the structural characteristics of the worm and gear, worm and gear speed reducers on the market are of a 90-degree structure (the axial direction of a motor is vertical to the axial direction of the speed reducer), so that the anti-reverse speed reducers are not suitable for occasions.

b. Motor brake anti-reversion

In order to achieve the purpose of reverse rotation prevention, a brake device is added on a motor of some speed reducers, so that the size and the cost of the motor are increased, and the speed reducers are not smooth to control.

(4) The structure is complicated, for example, the number of single parts in the planetary gear reducer is large, and the planetary gear reducer cannot be assembled by non-professionals.

In recent times, the field of machines replacing human work is increasing, more and smaller machine devices (such as mechanical arms, small robots and the like) are needed, and the size of a reducer for power transmission and change is smaller, and the transmission is more stable. At present, some relatively good speed reducers such as a harmonic speed reducer and a planetary gear speed reducer are most commonly used, are also known as small-size transmission stability, and are only high in manufacturing cost, high in price and complex in structure.

This patent is mainly to the speed reducer that ectoskeleton robot and various robotic arm used, research and develop a small-size speed reducer that processing is simple, the cost is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a small-size worm gear speed reducer to solve the technical problem that the processing of the small-size speed reducer who uses on ectoskeleton robot and various robotic arm that exists among the prior art is complicated, the cost is high.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a small worm gear speed reducer, which comprises an output assembly and an input assembly, wherein the output assembly is in transmission connection with equipment to be driven, and the input assembly is in transmission connection with a driving device;

the speed reducing assembly is arranged between the output assembly and the input assembly and used for reducing the rotating speed of the driving device to the required rotating speed and then transmitting the rotating speed to the output assembly, and the speed reducing assembly can be used for steering the driving direction of the driving device for two times by 90 degrees.

As a further improvement of the utility model, the speed reducer still includes the base and sets up shell on the base, the shell top is uncovered, input assembly rotates and wears to establish on the base, output assembly rotates and sets up the uncovered side in shell top, the speed reduction subassembly sets up in the shell.

As a further improvement of the utility model, the speed reduction subassembly includes drive bevel gear, worm bevel gear pair, turbine straight-teeth gear pair and ring gear, drive bevel gear sets up input assembly is terminal, worm bevel gear pair sets up drive bevel gear top, turbine straight-teeth gear pair sets up worm bevel gear pair side, bevel gear in the worm bevel gear pair with drive bevel gear meshing connects and carries out 90 degrees transmission and turns to, worm on the worm bevel gear pair with turbine meshing in the turbine straight-teeth gear pair connects and carries out 90 degrees transmission and turns to, straight-teeth gear in the turbine straight-teeth gear pair with the ring gear meshing connects, the ring gear sets up on the output assembly.

As a further improvement of the utility model, the transmission ratio between the worm bevel gear pair and the turbine straight gear pair is 1: 50; the transmission ratio between the turbine straight gear pair and the inner gear ring is 1: 4.

As a further improvement of the present invention, the output assembly is an annular shell, the annular gear is disposed on the inner wall of the annular shell, the outer diameter of the annular shell is equal to the inner diameter of the outer shell, and the annular shell is connected to the outer shell through a rotation structure or a sliding structure.

As a further improvement of the present invention, the rotation structure includes an edge the first rolling groove provided in the circumferential direction of the inner wall of the housing, an edge the second rolling groove provided in the circumferential direction of the outer wall of the annular housing, a plurality of balls provided in the second rolling groove.

As a further improvement of the utility model, the top of the annular shell is provided with an output fixing plate.

As a further improvement of the utility model, a fixed station is arranged on the outer wall of the shell.

As a further improvement of the utility model, two ends of the worm bevel gear pair are respectively and rotatably connected to a worm support plate vertically arranged on the base; the turbine straight gear pair is rotatably connected to be vertically arranged on the base, and a support sleeve is arranged on the outer side of the turbine support shaft and below the turbine straight gear pair.

As a further improvement of the present invention, the drive bevel gear and the base are provided with a bushing therebetween.

Compared with the prior art, the utility model following beneficial effect has:

1. the speed reducer provided by the utility model has the advantages that under the condition of ensuring the rigid requirements of transmission ratio, torsion, axial radial stress, precision and the like, the speed reducer realizes the effects of overall volume reduction, component reduction and simple and reliable structure by using the speed reducing component which turns for 90 degrees twice while realizing large transmission ratio speed reduction;

2. the utility model provides a speed reducer is connected through the worm meshing in the turbine straight-gear pair and the worm bevel gear pair, and the worm is in the input side, and the worm is located the output side, both adopted turbine worm mechanism, add bevel gear on the basis of the turbine worm characteristics and changed the transmission direction, changed the structure of original 90 (motor axial and speed reducer axial are perpendicular) into parallel concentric structure (motor and speed reducer axial are on a straight line), solved the speed reducer and had the function of preventing reversing, must input and the output shaft between the requirement of must 90, make the utility model discloses a speed reducer can all use in many fields;

3. the utility model provides a speed reducer has the characteristics that the cost is low, and this speed reducer simple structure accessory is few to stick processing is simple and need not the conventional processing factory of special equipment and just can process.

4. The utility model provides a speed reducer still has stable in structure, characteristics of dependable performance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a small worm gear reducer of the present invention;

fig. 2 is a schematic perspective view of the small worm gear reducer of the present invention when viewed from the base;

fig. 3 is a schematic view of the three-dimensional structure of the small worm gear reducer with the output fixing plate removed;

fig. 4 is a top view of the small worm gear reducer of the present invention with the output fixing plate removed;

FIG. 5 is the AA view of FIG. 4;

FIG. 6 is view BB of FIG. 4;

fig. 7 is an explosion structure schematic diagram of the small worm gear reducer of the present invention;

fig. 8 is a schematic perspective view of a speed reduction assembly in the small worm gear speed reducer of the present invention;

fig. 9 is a schematic perspective view of a reinforcing support plate in the small worm gear reducer of the present invention;

fig. 10 is a schematic perspective view of a fixing table in the small worm gear reducer of the present invention.

FIG. 1, base; 2. a housing; 3. a speed reduction assembly; 31. a drive bevel gear; 32. a worm bevel gear pair; 321. a bevel gear; 322. a worm; 33. a turbine straight gear pair; 331. a turbine; 332. a spur gear; 34. an inner gear ring; 4. an annular shell; 5. a rotating structure; 51. a first roll groove; 52. a second roll groove; 53. a ball bearing; 6. an output fixing plate; 7. a fixed table; 8. a worm support plate; 9. a turbine support shaft; 91. a support sleeve; 10. a bushing; 100. and reinforcing the support plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 and 2, the utility model provides a small worm gear speed reducer, which comprises an output assembly and an input assembly, wherein the output assembly is in transmission connection with a device to be driven, and the input assembly is in transmission connection with a driving device; the speed reducing device further comprises a speed reducing assembly 3 which is arranged between the output assembly and the input assembly and used for reducing the rotating speed of the driving device to the required rotating speed and then transmitting the rotating speed to the output assembly, and the speed reducing assembly 3 is the speed reducing assembly 3 capable of performing 90-degree rotation twice on the transmission direction of the driving device.

Through adopting the speed reduction subassembly that has to turn to and slow down the function, can realize big drive ratio deceleration for the speed reducer realizes that whole volume reduces, the weight alleviates, simple structure is reliable effect.

As shown in fig. 3, as an alternative embodiment, the speed reducer further includes a base 1 and a housing 2 disposed on the base 1, a top of the housing 2 is open, the input assembly is rotatably disposed on the base 1, the output assembly is rotatably disposed on an open side of the top of the housing 2, and the speed reduction assembly 3 is disposed in the housing 2. The shell 2 is of an integral structure and plays a role in supporting and fixing.

As shown in fig. 4-6, the speed reduction assembly includes a driving bevel gear 31, a worm bevel gear pair 32, a worm straight gear pair 33 and internal teeth 34, the driving bevel gear 31 is disposed at the end of the input assembly, the worm bevel gear pair 32 is disposed above the driving bevel gear 31, the worm straight gear pair 33 is disposed beside the worm bevel gear pair 32, a bevel gear 321 in the worm bevel gear pair 32 is engaged with the driving bevel gear 31 and performs 90-degree transmission and steering, a worm 322 on the worm bevel gear pair 32 is engaged with a worm gear 331 in the worm straight gear pair 33 and performs 90-degree transmission and steering, a straight gear 332 in the worm straight gear pair 33 is engaged with an internal gear 34, and the internal gear 34 is disposed on the output assembly. The worm bevel gear pair 32 is a structure integrating a worm 322 and a bevel gear 321, and the bevel gear 321 is meshed with the driving bevel gear 31; the turbine straight gear pair 33 is an integral structure of the turbine 331 and the straight gear 332; the inner gear ring 34 is of a straight-tooth structure, and straight teeth on the inner gear ring 34 are meshed with a straight gear 332 of the turbine straight gear pair 33. The transmission between the driving bevel gear 31 and the worm bevel gear pair 32 is changed in transmission direction through meshing of two 90-degree bevel gears (originally, axial transmission is changed into radial transmission). The worm 322 and the worm wheel 331 are driven by the anti-reversion and the increase of the transmission ratio (1: 50 is selected in the utility model), and the worm wheel and the worm with different transmission ratios can be replaced according to different requirements of the transmission ratio at the later stage.

It should be noted that the utility model discloses in, drive arrangement is the motor, and the vertical setting of output shaft of motor, terminal and input assembly one end are connected, and input assembly's the other end is connected with the speed reduction subassembly transmission, and speed reduction subassembly carries out the rotational speed that motor input was come and transmits through output assembly after the reduction ratio reduces to wait on the drive device. The utility model discloses in, the output shaft of motor with the utility model discloses well speed reducer's axial is parallel concentric structure on same straight line.

As an alternative embodiment, the transmission ratio between the worm bevel gear pair 32 and the worm spur gear pair 33 is 1: 50; the transmission ratio between the turbine spur gear pair 33 and the inner gear ring 34 is 1: 4. Of course, other transmission ratio technical schemes can be replaced according to actual requirements. Thereby spur gear 332 and ring gear 34 meshing because the number of teeth is different drive ratio is different (the utility model discloses in select for use the gear ratio be 1: 4), later stage can be according to the drive ratio demand different and change spur gear 332 and ring gear 34 of different numbers of teeth.

As shown in fig. 7, as an alternative embodiment, the output assembly is an annular shell 4, an inner gear ring 34 is arranged on the whole inner wall of the annular shell 4, the outer diameter of the annular shell 4 is equal to the inner diameter of the outer shell 2, and the annular shell 4 is connected with the outer shell 2 through a rotating structure 5 or a sliding structure. Through the rotating structure 5, the annular shell 4 can coaxially rotate relative to the shell 2, the output shaft of the motor is connected with the input assembly for power transmission, the input assembly transmits power to the bevel gear 321 through the driving bevel gear 32 at the top of the input assembly, the bevel gear 321 and the worm 322 are of a coaxial structure, the rotation of the bevel gear 321 drives the worm 322 to rotate, the rotation of the worm 322 drives the worm gear 331 to rotate, the rotation of the worm gear 331 drives the spur gear 332 to rotate, the rotation of the spur gear 332 drives the inner gear 34 to rotate, the rotation of the inner gear 34 drives the annular shell 4 integrally formed with the inner gear to rotate, and the rotation of the annular shell 4 can drive a device to be driven connected with. The fixing and matching of the outer shell 2 and the annular shell 4 are also various and can be changed according to the requirements of actual conditions, and the annular shell 4 is mainly ensured to be limited and can rotate relative to the outer shell 2.

Specifically, in an alternative embodiment, the rotating structure 5 includes a first rolling groove 51 circumferentially disposed along the inner wall of the outer casing 2, a second rolling groove 52 circumferentially disposed along the outer wall of the annular casing 4, and a plurality of balls 53 rolling in the first rolling groove 51 and the second rolling groove 52. The first and second rolling

grooves

51 and 52 are each a semi-circular arc shaped groove, and the ring housing 4 is rotated relative to the housing 2 by the balls 53 when the ring gear 34 is driven. The second rolling grooves 52 outside the ring-shaped housing 4 and the first rolling grooves 51 inside the housing 2 are combined with balls 53 to form a bearing-like structure. If the device is subjected to excessive axial force due to radial force, the rotating structure 5 can be replaced by a sliding structure (a ball is eliminated, and a bush or a clamping groove is added) so as to ensure that larger axial force and radial force are used.

Further, an output fixing plate 6 is provided on the top of the annular housing 4. The device to be driven is mounted on the output fixing plate 6.

In order to install and fix the speed reducer, a fixing table 7 is arranged on the outer wall of the shell 2. As shown in fig. 1 and 2, the final assembly of the speed reducer is completed, but the fixing structure for fixing the speed reducer is not limited to the fixing table 7, the structure of the fixing table 7 is not limited, and different forms of fixing tables 7 may be designed according to the actual use environment.

The external fixing mode is more diversified, and the external fixing mode can be realized by punching holes on the end face of the shell 2 and fixing the external fixing mode by adding a fixing table 7 as shown in figures 1 and 10. The fixing method of the output assembly is many, and as shown in fig. 7, can be added to output the fixing plate 6 and punch corresponding holes.

As an alternative embodiment, as shown in fig. 8, two ends of the worm bevel gear pair 32 are respectively and rotatably connected to the worm support plate 8 vertically arranged on the base 1; specifically, the worm 322 and the bevel gear 321 are of a coaxial structure, two ends of a worm support shaft on the worm bevel gear pair 32 are fixed on the worm support plate 8, the worm 322 and the bevel gear 321 are rotatably arranged on the worm support shaft, the turbine straight gear pair 33 is rotatably connected to a turbine support shaft 9 vertically arranged on the base 1, and a support sleeve 91 is arranged on the outer side of the turbine support shaft 9 below the turbine straight gear pair 33. The support sleeve 91 serves to position and lubricate the spur gear set 33 of the turbine.

A bushing 10 is provided between the drive bevel gear 31 and the base 1. The bushing 10 ensures lubrication and fixation of the drive bevel gear 31.

As shown in fig. 9, it should be noted that if the reinforcing plate 100 is added when the load of the whole equipment is large (the position and form of the reinforcing plate 100 are freely changed). In an alternative embodiment, the reinforcing plate 100 is L-shaped and includes a first side and a second side, the first side is horizontally disposed, the end of the first side is fixedly connected to the top of the turbine supporting shaft 9, and the second side is vertically disposed, and the lower end of the second side is fixedly mounted on the base 1. As shown in fig. 10, the first side is connected to the turbine support shaft 9 and extends toward the top of the worm bevel gear pair 32, and the second side is fitted in the space between the worm bevel gear pair 32 and the ring gear 34.

The reinforcing support plate 100 mainly has the fixing function, the annular ring 34 and the output fixing plate 6 can be integrally processed when the annular shell 4 is processed, and the output fixing plate 6 can be fixed on the annular shell 4 by screws or can be welded.

The utility model provides a theory of operation of speed reducer:

the motor is directly connected with the driving bevel gear 31, the driving bevel gear 31 drives the worm bevel gear pair 32, the worm bevel gear pair 32 drives the turbine straight gear pair 33, the turbine straight gear pair 33 drives the inner gear ring 34, and the power is output by the annular shell 4.

The utility model provides a speed reducer solves the problem that the existing speed reducer is too large in size and high in cost, and the speed reducer which is high in quality and low in price can be used in the fields of robots, mechanical arms and mechanical intellectualization, and particularly, the speed reducer of the utility model realizes the effects of reducing the whole size, reducing the weight and having simple and reliable structure by using the speed reducing component which turns 90 degrees twice under the rigid requirements of ensuring the transmission ratio, the torsion, the axial radial stress, the precision and the like, and simultaneously realizing the speed reduction of the large transmission ratio; the utility model provides a speed reducer is connected through the worm meshing in the turbine straight-gear pair and the worm bevel gear pair, and the worm is in the input side, and the worm is located the output side, both adopted turbine worm mechanism, add bevel gear on the basis of the turbine worm characteristics and changed the transmission direction, changed the structure of original 90 (motor axial and speed reducer axial are perpendicular) into parallel concentric structure (motor and speed reducer axial are on a straight line), solved the speed reducer and had the function of preventing reversing, must input and the output shaft between the requirement of must 90, make the utility model discloses a speed reducer can all use in many fields; the utility model provides a speed reducer has the characteristics that the cost is low, and this speed reducer simple structure accessory is few to stick processing is simple and need not the conventional processing factory of special equipment and just can process. The utility model provides a speed reducer still has stable in structure, characteristics of dependable performance.

It should be noted that the utility model provides a speed reducer can reach different drive ratios through changing the gear of different models (the bigger is the drive ratio the volume corresponding increase, when using under the environment of big load, can strengthen the reinforcement, for example add support, strengthening rib, change big modulus gear etc. can add bush or bearing etc. and improve the lubrication in all rotatory positions, improve life, the annular shell of output assembly part and the connected mode between the shell can change the form, for example change the rolling friction form of bearing for the sliding friction increases the atress condition, the shell can increase the mounting hole and the mount table of fixing usefulness, each part equipment can be for separating the concatenation mode or integral in the speed reducer.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A small-sized worm gear speed reducer is characterized by comprising an output assembly and an input assembly, wherein the output assembly is in transmission connection with equipment to be driven, and the input assembly is in transmission connection with a driving device;

2. The small-sized worm and gear speed reducer according to claim 1, wherein the speed reducer further comprises a base and a housing arranged on the base, the top of the housing is open, the input assembly is rotatably arranged on the base in a penetrating manner, the output assembly is rotatably arranged on the side of the open top of the housing, and the speed reducer is arranged in the housing.

3. The small-sized worm and gear speed reducer according to claim 2, wherein the speed reduction assembly comprises a drive bevel gear, a worm bevel gear pair, a turbine straight gear pair and an inner gear ring, the drive bevel gear is arranged at the tail end of the input assembly, the worm bevel gear pair is arranged above the drive bevel gear, the turbine straight gear pair is arranged beside the worm bevel gear pair, a bevel gear in the worm bevel gear pair is meshed with the drive bevel gear and is connected with the drive bevel gear to perform 90-degree transmission steering, a worm on the worm bevel gear pair is meshed with a turbine in the turbine straight gear pair and is connected with the turbine in the turbine straight gear pair to perform 90-degree transmission steering, a straight gear in the turbine straight gear pair is meshed with the inner gear ring and is connected with the inner gear ring, and the inner gear ring is arranged on the output assembly.

4. The small-sized worm and gear speed reducer according to claim 3, wherein the transmission ratio between the worm bevel gear pair and the turbine spur gear pair is 1: 50; the transmission ratio between the turbine straight gear pair and the inner gear ring is 1: 4.

5. The small-sized worm and gear speed reducer according to claim 3 or 4, wherein the output assembly is an annular shell, the inner gear ring is arranged on the whole inner wall of the annular shell, the outer diameter of the annular shell is equal to the inner diameter of the outer shell, and the annular shell and the outer shell are connected through a rotating structure or a sliding structure.

6. The small worm and gear reducer according to claim 5, wherein the rotating structure comprises a first rolling groove circumferentially arranged along the inner wall of the housing, a second rolling groove circumferentially arranged along the outer wall of the annular housing, and a plurality of balls rolling in the first rolling groove and the second rolling groove.

7. The small worm and gear reducer according to claim 5, wherein an output fixing plate is arranged at the top of the annular shell.

8. The small-sized worm and gear speed reducer according to claim 2, wherein a fixing table is arranged on the outer wall of the housing.

9. The small-sized worm and gear speed reducer according to claim 3, wherein two ends of the worm bevel gear pair are respectively and rotatably connected to a worm support plate vertically arranged on the base; the turbine straight gear pair is rotatably connected to be vertically arranged on the base, and a support sleeve is arranged on the outer side of the turbine support shaft and below the turbine straight gear pair.

10. The small worm gear reducer according to claim 3, wherein a bushing is provided between the drive bevel gear and the base.