CN216111962U - Gear transmission mechanism and rotary equipment - Google Patents

Abstract

The utility model discloses a gear transmission mechanism and a rotary device, comprising: a driven gear; the output shaft is provided with a flange plate; the driving gear is arranged on the output shaft and is meshed with the driven gear, and the power of the output shaft is transmitted to the driven gear by the driving gear; the backlash eliminating mechanism comprises a backlash eliminating gear and an elastic component, wherein the backlash eliminating gear is arranged on an output shaft and is arranged between a driving gear and a flange plate, the backlash eliminating gear is meshed with a driven gear, the elastic component is arranged between the flange plate and the backlash eliminating gear, the backlash eliminating gear rotates around the output shaft to be staggered with the driving gear by a certain angle, and the tooth surface of the driving gear and the tooth surface of the backlash eliminating gear are respectively attached to the tooth surfaces of two sides of a tooth groove of the driven gear. The device adopts the scheme that the double gears are installed in a staggered mode to eliminate the tooth gaps, and the structure is simplified by rearranging the tooth gap eliminating mechanism, so that the device can be applied to the pinion, and the problems of high cost and difficulty in arrangement in the prior art are solved.

Description

Gear transmission mechanism and rotary equipment

Technical Field

The utility model is used in the field of mechanical transmission, and particularly relates to a gear transmission mechanism and rotary equipment.

Background

The backlash of the gears affects the transmission precision of the reciprocating rotation, and when the transmission precision is required to be less than 10 arc minutes, the reduction or elimination of the backlash needs to be considered to ensure the precision. If need reduce the backlash through the mode of processing, it is higher to the machining precision requirement, difficult realization. If a double-gear backlash elimination scheme is adopted, the gear needs to be enlarged to accommodate an extension spring or a torsion spring, so that the whole device is complex in structure, large in size and difficult to arrange, and cannot be used for a pinion side generally.

In addition, the rotary equipment has wide application in the production of the automobile industry, such as various positioning machines, rotary tables, rotary drums and the like, and the workpieces are often required to rotate between two or more positions, so that certain requirements are required on the in-place precision. When the load is great, the slewing equipment needs to increase the gear pair amplification torque, the slewing precision is influenced by the gear pair backlash, high-precision positioning cannot be realized, extra positioning components (such as bolts and the like) are needed, and the positioning mode can only perform auxiliary positioning at a limited working position, so that the use flexibility is greatly influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve at least one technical problem in the prior art and provides a gear transmission mechanism and a rotary device.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

in a first aspect, a gear assembly includes:

a driven gear;

the output shaft is provided with a flange plate;

a driving gear installed at the output shaft and engaged with the driven gear, the driving gear transmitting power of the output shaft to the driven gear;

the backlash eliminating mechanism comprises a backlash eliminating gear and an elastic component, wherein the backlash eliminating gear is arranged on the output shaft and is arranged between the driving gear and the flange plate, the backlash eliminating gear is meshed with the driven gear, the elastic component is arranged between the flange plate and the backlash eliminating gear, the backlash eliminating gear rotates around the output shaft to be staggered with the driving gear by a certain angle, and the tooth surface of the driving gear and the tooth surface of the backlash eliminating gear are respectively attached to the tooth surfaces of two sides of the tooth groove of the driven gear.

With reference to the first aspect, in certain implementation manners of the first aspect, the elastic component includes a pressure spring, a first pressure spring supporting structure is disposed on an end surface of the flange plate, which is close to the backlash eliminating gear, a second pressure spring supporting structure is disposed on an end surface of the backlash eliminating gear, which is close to the flange plate, and the pressure spring is supported between the first pressure spring supporting structure and the second pressure spring supporting structure along a tangential direction of the backlash eliminating gear.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the first pressure spring support structure includes a first fixed block, a second fixed block, and a pressure plate, the first fixed block and the second fixed block are both mounted on an end surface of the flange, a groove extending tangentially along the backlash eliminating gear is formed between the first fixed block and the second fixed block, the pressure plate is located at one end of the groove, two ends of the pressure plate are connected to the first fixed block and the second fixed block, the pressure spring is disposed in the groove, and one end of the pressure spring abuts against the pressure plate.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the pressure plate is connected with the first fixing block and the second fixing block through screws.

With reference to the first aspect and the foregoing implementations, in certain implementations of the first aspect, the pressure plate is provided with a guide shaft extending into the pressure spring.

With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, the second pressure spring support structure includes a stopper, and the other end of the pressure spring abuts against the stopper.

With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, the pressure spring, the first pressure spring support structure, and the second pressure spring support structure form an elastic assembly, a plurality of elastic assemblies are disposed between the flange plate and the backlash eliminating gear, and the elastic assemblies are uniformly distributed around an axis of the output shaft.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the method further includes:

and the output shaft is connected with the output end of the servo motor through the flange plate.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, an output end of the servo motor is provided with a speed reducer, and the flange is connected to the speed reducer.

In a second aspect, a slewing device comprises the gear transmission mechanism according to any one of the implementations of the first aspect.

One of the above technical solutions has at least one of the following advantages or beneficial effects: the backlash eliminating mechanism utilizes an elastic component arranged between the flange plate and the backlash eliminating gear, the backlash eliminating gear and the driving gear are automatically staggered by a certain angle through the elastic component, the driving gear and the backlash eliminating gear are respectively attached to the tooth surfaces on two sides of the tooth socket of the driven gear, and backlash is completely eliminated and can be automatically compensated.

This device uses the scheme that the tooth clearance was eliminated in the installation of double gear dislocation, through rearranging the tooth clearance mechanism that disappears, simplifies the structure, through set up elastomeric element between ring flange and the tooth clearance gear that disappears, makes it can apply to the pinion, has solved the problem that prior art cost is higher, arrange the difficulty.

This scheme uses elastomeric element to make double gear dislocation installation eliminate the tooth clearance, realizes the transmission of slewing equipment high accuracy, and positioning accuracy only depends on motor and speed reducer precision, if uses high accuracy servo motor and speed reducer, and the precision is steerable about 1 arc minute, need not to add locating component and can realize the accurate positioning of optional position, has improved equipment flexibility and use flexibility greatly. Meanwhile, the gear can properly reduce the machining precision and save the cost.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of one embodiment of the gear system of the present invention;

FIG. 2 is a schematic structural view of an anti-backlash mechanism of the embodiment shown in FIG. 1;

FIG. 3 is a schematic view of a multiple resilient assembly arrangement of the embodiment shown in FIG. 1;

FIG. 4 is a schematic structural view of one embodiment of the gear rotating apparatus of the present invention;

figure 5 is a side view of the structure of one embodiment shown in figure 4.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the utility model, the meaning of "a plurality" is one or more, the meaning of "a plurality" is more than two, and the terms of "more than", "less than", "more than" and the like are understood to exclude the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the present invention, unless otherwise specifically limited, the terms "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and for example, may be directly connected or indirectly connected through an intermediate; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.

Referring to fig. 1, an embodiment of the present invention provides a gear transmission mechanism, which includes a driven gear 1, an output shaft 2, a driving gear 3, and a backlash eliminating mechanism 4, wherein the output shaft 2 is provided with a flange 21 for connecting with a motor or a reducer. The driving gear 3 is mounted on the output shaft 2 and engaged with the driven gear 1, and the power of the output shaft 2 is transmitted to the driven gear 1 from the driving gear 3 and then output from the driven gear 1.

Referring to fig. 1 and 2, the backlash eliminating mechanism 4 includes a backlash eliminating gear 41 and an elastic member, the backlash eliminating gear 41 is mounted on the output shaft 2 and disposed between the driving gear 3 and the flange 21, and the backlash eliminating gear 41 is engaged with the driven gear 1, that is, both the driving gear 3 and the backlash eliminating gear 41 are mounted on the output shaft 2 and engaged with the driven gear 1. The backlash elimination gear 41 is different from the drive gear 3 in that it is rotatable with respect to the output shaft 2. The elastic member is arranged between the flange 21 and the backlash eliminating gear 41, and the backlash eliminating gear 41 rotates around the output shaft 2 to be staggered with the driving gear 3 by a certain angle, and the tooth surface of the driving gear 3 and the tooth surface of the backlash eliminating gear 41 are respectively attached to the tooth surfaces on both sides of the tooth space of the driven gear 1.

The backlash eliminating mechanism 4 utilizes an elastic component arranged between the flange 21 and the backlash eliminating gear 41 to automatically stagger the backlash eliminating gear 41 and the driving gear 3 by a certain angle through the elastic component, so that the driving gear 3 and the backlash eliminating gear 41 are respectively attached to the two side tooth surfaces of the tooth space of the driven gear 1, complete elimination of the backlash is realized, and automatic compensation can be realized. The transmission precision is improved by eliminating the backlash, the backlash eliminating mechanism 4 can realize high-precision transmission by matching with a high-precision servo motor speed reducer, and meanwhile, the gear can properly reduce the processing precision and save the cost.

The device adopts the scheme of removing the tooth clearance by mounting the double gears in a staggered manner, simplifies the structure by rearranging the tooth clearance removing mechanism 4, and arranges an elastic component between the flange plate 21 and the tooth clearance removing gear 41, so that the elastic component can be applied to a pinion, and the problems of higher cost and difficult arrangement in the prior art are solved.

The elastic component may be a tension spring, a compression spring, a torsion spring, a spring sheet, or the like, in some embodiments, referring to fig. 1 and fig. 2, the elastic component includes a compression spring 42, a space is left between the flange 21 and the backlash eliminating gear 41, the flange 21 is provided with a first compression spring support structure on a side end surface close to the backlash eliminating gear 41, the backlash eliminating gear 41 is provided with a second compression spring support structure on a side end surface close to the flange 21, and the compression spring 42 is supported between the first compression spring support structure and the second compression spring support structure along a tangential direction of the backlash eliminating gear 41. The pressure spring 42 pushes the second pressure spring support structure, and then pushes the backlash elimination gear 41 to rotate around the output shaft 2 by an angle slightly staggered with the driving gear 3. During meshing transmission, the tooth surface of the driving gear 3 and the tooth surface of the backlash eliminating gear 41 are respectively attached to the tooth surfaces on two sides of the tooth space of the driven gear 1, so that the backlash is completely eliminated, and automatic compensation is realized through the change of the spring expansion amount. The present embodiment can be applied to a pinion by using the compression spring 42 which is easy to manufacture, and the problems of increasing the precision of the gear/using a tension spring or a torsion spring, which is high in cost, and difficult to arrange are avoided.

Further, referring to fig. 2 and 3, the first pressure spring support structure includes a first fixed block 43, a second fixed block 44, and a pressure plate 45, the first fixed block 43 and the second fixed block 44 are both fixedly mounted on the end surface of the flange 21, a groove 46 extending along the tangential direction of the backlash eliminating gear 41 is formed between the first fixed block 43 and the second fixed block 44, the pressure plate 45 is located at one end of the groove 46, two ends of the pressure plate 45 are connected to the first fixed block 43 and the second fixed block 44, the pressure spring 42 is disposed in the groove 46, and one end of the pressure spring 42 abuts against the pressure plate 45. The first pressure spring supporting structure forms a groove 46 which limits the pressure spring 42 through the first fixing block 43, the second fixing block 44 and the pressing plate 45, and further combines the anti-backlash gear 41 and the flange 21 at two sides, so that the pressure spring 42 can be prevented from falling off in the working process.

Further, referring to fig. 2 and 3, end faces of the first fixing block 43 and the second fixing block 44 are exposed to a gap between the anti-backlash gear 41 and the flange 21, and the pressing plate 45 is connected to the end faces of the first fixing block 43 and the second fixing block 44 by screws. On one hand, the assembly of the pressure spring 42 between the anti-backlash gear 41 and the flange 21 is facilitated, and on the other hand, the adjustment compression amount of the pressure spring 42 can be changed through an adjusting screw.

In some embodiments, to better provide a stop and guide for compression spring 42, pressure plate 45 is provided with a guide shaft 47 extending into compression spring 42, see fig. 3.

Referring to fig. 2 and 3, the second pressure spring supporting structure comprises a stopper 48, the stopper 48 extends from the end face of the backlash eliminating gear 41 to the direction of the flange 21 to provide a supporting position for the pressure spring 42, and the other end of the pressure spring 42 abuts against the stopper 48, so that force transmission from the flange 21 to the backlash eliminating gear 41 is realized.

In some embodiments, referring to fig. 3, in order to ensure the balance of the force applied to the anti-backlash gear 41, avoid the anti-backlash gear 41 deviating from the axis of the output shaft 2, and improve the stability of the rotation of the anti-backlash gear 41, the pressure spring 42, the first pressure spring support structure, and the second pressure spring support structure form an elastic assembly, and a plurality of elastic assemblies are arranged between the flange 21 and the anti-backlash gear 41, and are uniformly distributed around the axis of the output shaft 2. The plurality of elastic members provide more balanced forces to the backlash elimination gear 41 in the circumferential direction and urge the backlash elimination gear 41 to rotate around the output shaft 2 at an angle slightly offset from the drive gear 3.

Referring to fig. 1, in some embodiments, the gear transmission mechanism further includes a servo motor 5, and the output shaft 2 is connected to an output end of the servo motor 5 through a flange 21.

Further, the gear transmission mechanism further comprises a speed reducer 6, the speed reducer 6 is connected to the output end of the servo motor 5, and the flange 21 is connected with the speed reducer.

The device is powered by a servo motor 5, can be transmitted to an output shaft 2 through a speed reducer or directly connected with the output shaft 2, the output shaft 2 is connected with a motor or the speed reducer through a flange 21, and power is transmitted to a driving gear 3 through the output shaft 2 and then transmitted to a driven gear 1 for output.

Referring to fig. 4 and 5, an embodiment of the present invention further provides a slewing device, including a gear transmission mechanism in any one of the above embodiments of the base assembly 7 and the frame assembly 8, wherein the driven gear 1 adopts a slewing bearing. Wherein, servo motor 5, speed reducer and carousel bearing are installed on base subassembly 7, and servo motor 5 provides power, can transmit to output shaft 2 through the speed reducer, and output shaft 2 passes through ring flange 21 and links to each other with the speed reducer, and driving gear 3 meshes with carousel bearing outer gear ring mutually. The power is transmitted to the driving gear 3 from the output shaft 2 and then transmitted to the turntable bearing for output. The frame assembly 8 is installed on the turntable bearing, and the clamp and the workpiece are placed on two sides of the frame assembly 8 and can rotate along with the turntable bearing. The anti-backlash gear 41 is urged to rotate around the output shaft 2 by an angle slightly offset from the drive gear 3 by an elastic member provided between the drive gear 3 and the flange 21. When the gear is in meshing transmission with the outer gear ring of the turntable bearing, the tooth surface of the driving gear 3 and the tooth surface of the backlash eliminating gear 41 are respectively attached to the tooth surfaces at two sides of the tooth groove of the outer gear ring, the backlash is completely eliminated, automatic compensation is realized through the change of the spring expansion amount, and the rotation precision is improved.

This scheme uses elastomeric element to make double gear dislocation installation eliminate the tooth clearance, realizes the transmission of slewing equipment high accuracy, and positioning accuracy only depends on motor and speed reducer precision, if uses high accuracy servo motor 5 and speed reducer, and the precision is steerable about 1 arc minute, need not to add locating component and can realize the accurate positioning of optional position, has improved equipment flexibility and use flexibility greatly. Meanwhile, the gear can properly reduce the machining precision and save the cost.

In the description herein, references to the description of the term "example," "an embodiment," or "some embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The utility model is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the utility model, and such equivalent modifications or substitutions are included in the scope of the claims of the present application.

Claims (10)

1. A gear assembly, comprising:

a driven gear;

the output shaft is provided with a flange plate;

a driving gear installed at the output shaft and engaged with the driven gear, the driving gear transmitting power of the output shaft to the driven gear;

the backlash eliminating mechanism comprises a backlash eliminating gear and an elastic component, wherein the backlash eliminating gear is arranged on the output shaft and is arranged between the driving gear and the flange plate, the backlash eliminating gear is meshed with the driven gear, the elastic component is arranged between the flange plate and the backlash eliminating gear, the backlash eliminating gear rotates around the output shaft to be staggered with the driving gear by a certain angle, and the tooth surface of the driving gear and the tooth surface of the backlash eliminating gear are respectively attached to the tooth surfaces of two sides of the tooth groove of the driven gear.

2. The gear transmission mechanism according to claim 1, wherein the elastic member comprises a compression spring, the flange plate is provided with a first compression spring support structure at a side end face close to the backlash eliminating gear, the backlash eliminating gear is provided with a second compression spring support structure at a side end face close to the flange plate, and the compression spring is supported between the first compression spring support structure and the second compression spring support structure along a tangential direction of the backlash eliminating gear.

3. The gear transmission mechanism according to claim 2, wherein the first pressure spring support structure includes a first fixed block, a second fixed block, and a pressure plate, the first fixed block and the second fixed block are both mounted on the end face of the flange, a groove extending tangentially along the anti-backlash gear is formed between the first fixed block and the second fixed block, the pressure plate is located at one end of the groove, both ends of the pressure plate are connected to the first fixed block and the second fixed block, the pressure spring is disposed in the groove, and one end of the pressure spring abuts against the pressure plate.

4. The gear transmission of claim 3, wherein the pressure plate is connected to the first and second fixed blocks by screws.

5. A gear transmission according to claim 3, wherein the pressure plate is provided with a guide shaft extending into the pressure spring.

6. A gear transmission according to claim 3, wherein the second compression spring support structure includes a stop against which the other end of the compression spring bears.

7. The gear transmission of claim 2, wherein said compression spring, said first compression spring support structure and said second compression spring support structure form a spring assembly, and a plurality of said spring assemblies are disposed between said flange plate and said anti-backlash gear, said plurality of said spring assemblies being evenly distributed about an axis of said output shaft.

8. The gear transmission mechanism according to any one of claims 1 to 7, further comprising:

and the output shaft is connected with the output end of the servo motor through the flange plate.

9. The gear transmission mechanism according to claim 8, wherein the output end of the servo motor is provided with a speed reducer, and the flange is connected with the speed reducer.

10. A rotary apparatus comprising the gear assembly of claim 8 or 9.

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