CN114378363A

CN114378363A - Self-adaptive anti-backlash gear box and circular sawing machine

Info

Publication number: CN114378363A
Application number: CN202210095495.5A
Authority: CN
Inventors: 林正华; 刘卫东; 蒋万春; 陈晶; 林健; 黄福生; 刘炳照
Original assignee: Fujian Hengda New Materials Co ltd
Current assignee: Fujian Hengda New Materials Co ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2022-04-22
Anticipated expiration: 2042-01-27
Also published as: CN114378363B

Abstract

The invention provides a self-adaptive anti-backlash gear box and a circular sawing machine, wherein the self-adaptive anti-backlash gear box comprises a gear box body, a power input assembly, a variable speed transmission assembly, a power output assembly and a self-adaptive anti-backlash assembly, wherein an input driving wheel, a gear of the variable speed transmission assembly, an output gear and a gear of the self-adaptive anti-backlash assembly are all helical gears, the power output assembly drives the gear of the self-adaptive anti-backlash assembly and utilizes a helical tooth angle to extrude the self-adaptive anti-backlash assembly to move along a first direction while outputting power, when the extrusion force applied to a buffer assembly reaches a first threshold value, the buffer assembly provides a reverse reaction force to an anti-backlash main shaft, and under the action of the reaction force and the helical tooth angle, the anti-backlash main shaft reversely rotates along the helical tooth angle direction, so that the gear of the self-adaptive anti-backlash assembly is reversely meshed on the input driving wheel. The invention can solve the problem that the gear box in the prior art cannot be completely meshed due to the influence of gear machining precision and circular runout, and backlash is generated.

Description

Self-adaptive anti-backlash gear box and circular sawing machine

Technical Field

The invention relates to the field of gear transmission, in particular to a self-adaptive anti-backlash gear box and a circular sawing machine.

Background

The existing gear boxes on the market at present are provided with gear side gaps according to actual technical production capacity, the center distance of a processed box body has errors, the gear processing also has errors, the temperature can be increased when the transmission is stressed, the gears are heated and expanded, and the like, so that the gear set cannot be free of gaps. But in some precision machining, the cutting precision of the cutter is higher only by requiring the main shaft to have no clearance, the smoothness is better, and the service life of the cutter is longer by avoiding vibration.

The side clearance of the gear can be reduced by increasing the machining precision of the gear and the box body, but in order to prevent the gear from locking due to thermal expansion and cold contraction, the side clearance of 0.03-0.08 mm is always reserved. Meanwhile, the processing equipment and the price for high-precision full-grinding gears are too high, so that anti-backlash gears need to be developed.

The gap eliminating structure on the market is unstable, the service life is short, the effect is not good, the wheel gap eliminating structure reduces the side gap in a gear dislocation mode, but the jumping side gap generated by gear decentraction is reserved, the problem of no gap is not thoroughly solved, the side gap is enlarged after a period of use and abrasion, the reverse gap between positive rotation and negative rotation is not eliminated, the gap is adjusted again inconvenient, and the maintenance cost of a person is increased.

Disclosure of Invention

Aiming at the technical problems, the invention provides a self-adaptive anti-backlash gear box and a circular sawing machine, which aim to solve the problem that the gear box in the prior art cannot be completely meshed due to the influence of gear machining precision and circular runout to generate backlash.

To achieve the above object, the present invention provides an adaptive anti-backlash gearbox, comprising: a gear housing; the power input assembly is arranged in the gear box body and comprises an input shaft, an input driving wheel and a belt pulley, the input shaft is arranged on the gear box body through a first bearing, one end of the input shaft is connected with the belt pulley, the other end of the input shaft is sleeved with the input driving wheel, and the input driving wheel and the input shaft synchronously rotate and are used for outputting power input by the belt pulley; the gear of the variable-speed transmission assembly is meshed with the input driving wheel and is used for outputting the power input by the power input assembly after changing the speed; the power output assembly is arranged in the gearbox body and comprises an output gear, and the output gear is meshed with the gear of the variable speed transmission assembly and is used for outputting the power input by the variable speed transmission assembly after the speed is changed; the self-adaptive anti-backlash assembly is arranged in the gearbox body and comprises an anti-backlash main shaft and a buffer assembly, wherein the first end of the anti-backlash main shaft is fixed on the gearbox body through a second bearing, the buffer assembly is arranged at the second end of the anti-backlash main shaft, a gear of the self-adaptive anti-backlash assembly is meshed with an output gear of the power output assembly, and a gear of the self-adaptive anti-backlash assembly is meshed with the input driving wheel; the input driving wheel, the gear of the variable speed transmission assembly, the output gear and the gear of the self-adaptive anti-backlash assembly are all helical gears with helical tooth angles, the power output assembly drives the gear of the self-adaptive anti-backlash assembly and utilizes the helical tooth angles to extrude the self-adaptive anti-backlash assembly to move along a first direction while outputting power, when extrusion force received by the buffer assembly reaches a first threshold value, the buffer assembly provides reaction force along a second direction for the anti-backlash main shaft, and under the action of the reaction force and the helical tooth angles, the anti-backlash main shaft can reversely rotate along the direction of the helical tooth angles, so that the gear of the self-adaptive anti-backlash assembly is reversely meshed on the input driving wheel, and the first direction is opposite to the second direction.

Preferably, the buffer assembly is a flexible pushing device.

Preferably, the self-adaptive backlash elimination assembly further comprises a backlash elimination pinion and a backlash elimination bull gear, the backlash elimination pinion and the backlash elimination bull gear are sleeved and fixed on the backlash elimination main shaft, the backlash elimination pinion is meshed with the output gear, and the backlash elimination pinion is used for transmitting the reaction force output by the power output assembly to the backlash elimination bull gear; the backlash elimination large gear is meshed with the input driving wheel, and the backlash elimination large gear is used for eliminating backlash of the reaction of the output gear of the power output assembly and the meshing of the input driving wheel.

Preferably, the buffer assembly comprises: the hydraulic piston, the hydraulic seal ring, the hydraulic cylinder, the pipe joint and the pressure sensor are arranged on the gear box body, one end of the anti-backlash main shaft is arranged on the gear box body through a third bearing, and the other end of the anti-backlash main shaft is movably arranged on the hydraulic cylinder through a fourth bearing; the hydraulic piston is movably arranged in the hydraulic cylinder, and is connected with the anti-backlash main shaft through the fourth bearing; the hydraulic sealing ring is fixed on the hydraulic piston; the hydraulic cylinder is fixed on the gear box body, the hydraulic piston moves up and down in the hydraulic cylinder, and an oil line pipe fitting is installed at the upper end of the hydraulic cylinder; the pipe joint is fixed on the hydraulic cylinder and used for installing an oil supply pipe and a pressure sensor; the pressure sensor is fixed on the pipe joint and used for transmitting oil pressure data to the numerical control system; when the power output assembly outputs power, the backlash eliminating pinion of the self-adaptive backlash eliminating assembly is driven, the self-adaptive backlash eliminating assembly is extruded by the aid of the angle of the helical teeth to move along a first direction, when extrusion force applied to the buffer assembly reaches a first threshold value, oil pressure acting force in the pipe joint pushes the hydraulic piston to move along a second direction, reaction force is provided for the backlash eliminating main shaft, and under the action of the reaction force and the angle of the helical teeth, the backlash eliminating main shaft can rotate reversely along the direction of the angle of the helical teeth, so that the backlash eliminating gear of the self-adaptive backlash eliminating assembly is reversely meshed on the input driving wheel.

Preferably, the buffer assembly comprises a pushing piston, a bearing sleeve and a spring, the bearing sleeve is fixed on the gear box body, the pushing piston is movably arranged in the bearing sleeve, the spring is arranged between the bearing sleeve and the pushing piston, and the pushing piston and the anti-backlash main shaft are fixed through a fifth bearing; when the power output assembly outputs power, the backlash eliminating pinion of the self-adaptive backlash eliminating assembly is driven, the self-adaptive backlash eliminating assembly is extruded by the aid of the angle of the helical teeth to move along a first direction, when extrusion force applied to the buffer assembly reaches a first threshold value, the elastic pressure of the spring pushes the pushing piston to move along a second direction, reaction force is provided for the backlash eliminating main shaft, and under the action of the reaction force and the angle of the helical teeth, the backlash eliminating main shaft can rotate reversely along the direction of the angle of the helical teeth, so that a backlash eliminating gear of the self-adaptive backlash eliminating assembly is reversely meshed on the input driving wheel.

Preferably, the variable-speed transmission assembly comprises a transmission shaft, a transmission pinion and a transmission gearwheel, the transmission shaft is mounted on the gearbox body through a sixth bearing, the transmission pinion and the transmission gearwheel are fixedly sleeved on the transmission shaft, and the transmission gearwheel is meshed with the input driving wheel and is used for transmitting power input by the input driving wheel to the transmission pinion after changing speed; the drive pinion is meshed with the output gear for transmitting power to the output gear.

Preferably, the power output assembly further includes an output shaft mounted on the gear housing through a seventh bearing, and the output gear is sleeved and fixed on the output shaft, and is engaged with the transmission pinion, so as to transmit the power of the transmission pinion to the output shaft as the output power after changing the speed.

Preferably, the slag removing device further comprises a slag removing assembly, wherein the slag removing assembly comprises a transmission shaft, a bearing seat, a belt pulley, a rotating shaft, a bevel gear, a universal joint, a steel brush seat, a steel brush shaft and a steel wire brush, the transmission shaft is mounted on the bearing seat through an eighth bearing, the first end of the transmission shaft is connected with the input shaft to serve as a power source, and the second end of the transmission shaft is fixed on the belt pulley and used for transmitting the power of the input shaft to the belt pulley so as to enable the belt pulley to rotate; the bearing seat is fixed on the gear box body; the belt wheel is arranged on the transmission shaft and the rotating shaft, the belt is sleeved on the belt wheel, and power is output to the bevel gear from the transmission shaft through the belt; the bevel gear is arranged on the rotating shaft and the universal joint and used for outputting the power of the rotating shaft to the universal joint in a direction of rotating 90 degrees; the universal joint is arranged on the bevel gear and the steel brush shaft and is used for transmitting the power output by the rotating shaft to the steel brush shaft; the steel brush seat is fixed on the gearbox body, the steel brush shaft is arranged on the steel brush seat through a ninth bearing, the first end, located on one side of the steel brush seat, of the steel brush shaft is connected with the universal joint, the second end, located on the other side of the steel brush seat, of the steel brush shaft is fixedly connected with the steel wire brush, and the steel brush shaft is used for transmitting power output by the universal joint to the steel wire brush to enable the steel wire brush to rotate; and the steel wire brush rotates along with the steel brush shaft and contacts the element to be cleaned so as to clean residues on the element to be cleaned in the rotating process.

Preferably, the element to be cleaned is a saw blade.

The present invention also provides a circular sawing machine, comprising: an adaptive anti-backlash gearbox as described above.

Compared with the prior art, the anti-backlash mechanism is provided with four groups of transmission shafts, all the gear sets adopt an oblique gear structure with oblique tooth angles, the anti-backlash main shaft is utilized to connect the input shaft and the output shaft, and the buffer assembly (which is a flexible pushing device) is added at one end of the anti-backlash main shaft, so that the anti-backlash main shaft rotates reversely under the combined action of the oblique tooth angles and the reverse acting force provided by the buffer assembly to enable the anti-backlash gearwheel on the anti-backlash main shaft to be meshed with the input driving wheel of the input shaft, and the problem of combined backlash caused by machining errors or abrasion of various parts such as gears, bearings and the like is solved.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a top view of an adaptive anti-backlash gearbox according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line JJ of FIG. 1;

FIG. 3 is a schematic diagram of a portion of the structure of the adaptive anti-backlash gearbox of FIG. 1;

FIG. 4 is a top view of a portion of the adaptive anti-backlash gearbox of FIG. 3;

FIG. 5 is a schematic cross-sectional view of the first embodiment taken along line AA in FIG. 4;

FIG. 6 is a schematic cross-sectional view of the first embodiment taken along line BB of FIG. 4;

FIG. 7 is a schematic cross-sectional view of a second embodiment of an adaptive anti-backlash gearbox of the present invention;

FIG. 8 is a schematic cross-sectional view of a second embodiment of an adaptive anti-backlash gearbox of the present invention;

FIG. 9 is a schematic view of a slag removal assembly disposed in an adaptive anti-backlash gearbox in accordance with an embodiment of the present invention;

fig. 10 is a schematic sectional view taken along the line KK in fig. 9.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-6, fig. 1 is a top view of an adaptive anti-backlash gearbox according to an embodiment of the present invention;

FIG. 2 is a schematic sectional view taken along line JJ of FIG. 1. FIG. 3 is a schematic view of a portion of the structure of the adaptive anti-backlash gearbox of FIG. 1; FIG. 4 is a top view of a portion of the adaptive anti-backlash gearbox of FIG. 3; FIG. 5 is a schematic cross-sectional view of the first embodiment taken along line AA in FIG. 4; fig. 6 is a schematic cross-sectional view of the first embodiment along the line BB in fig. 4. As shown in fig. 1, the present invention provides an adaptive anti-backlash gearbox, wherein the adaptive anti-backlash gearbox 1000 comprises a gearbox housing 100, a power input assembly 1001, a variable transmission assembly 1002, a power output assembly 1003, and an adaptive anti-backlash assembly 1004. The gear housing 100 is a housing structure.

The power input assembly 1001 is mounted in the gear box 100, the power input assembly 1001 includes an input shaft 1, an input driving wheel 2 and a belt pulley 3, the input shaft 1 is mounted on the gear box 100 through a first bearing 101, one end of the input shaft 1 is connected with the belt pulley 3, the other end of the input shaft 1 is sleeved with the input driving wheel 2, and the input driving wheel 2 and the input shaft 1 rotate synchronously to output power input by the belt pulley 3. The speed change transmission assembly 1002 is installed in the gear box body 100, and a gear of the speed change transmission assembly 1002 is engaged with the input driving wheel 2 to change the speed of the power input by the power input assembly 1001 and then output the power. The power output assembly 1003 is installed in the gear box 100, the power output assembly 1003 includes an output gear 22, and the output gear 22 is engaged with the gear of the speed change transmission assembly 1002 to output the power input by the speed change transmission assembly 1002 after speed change. The adaptive anti-backlash assembly 1004 is mounted in the gear box 100, the adaptive anti-backlash assembly 1004 includes an anti-backlash spindle 41 and a buffer assembly, a first end 411 of the anti-backlash spindle 41 is fixed on the gear box 100 through a second bearing 400, the buffer assembly is disposed at a second end 412 of the anti-backlash spindle 41, a gear of the adaptive anti-backlash assembly 1004 is meshed with the output gear 22 of the power output assembly 1003, and a gear of the adaptive anti-backlash assembly 1004 is meshed with the input driving wheel 2. Wherein, the input driving wheel 2, the gear of the variable speed transmission assembly 1002, the output gear 22 and the gear of the adaptive backlash elimination assembly 1004 are all helical gears, the power output assembly 1003 outputs power, simultaneously, transmits the gear of the adaptive backlash elimination assembly 1004 and utilizes the helical tooth angle to press the adaptive backlash elimination assembly 1004 to move along a first direction D1, if a gap exists between the gears, when the pressing force applied to the buffer assembly reaches a first threshold value, the buffer assembly provides a reaction force along a second direction D2 to the backlash elimination spindle 41, under the action of the reaction force and the helical tooth angle, the backlash elimination spindle 41 reversely rotates along the helical tooth angle direction, so that the gear of the adaptive backlash elimination assembly 1004 reversely engages on the input driving wheel 2 to eliminate the gap between the gears, the first direction D1 is opposite the second direction D2.

As shown in fig. 6, the adaptive backlash elimination assembly 1004 further includes a backlash elimination pinion 42 and a backlash elimination bull gear 43, the backlash elimination pinion 42 and the backlash elimination bull gear 43 are both sleeved and fixed on the backlash elimination spindle 41, the backlash elimination pinion 42 is engaged with the output gear 22, and the backlash elimination pinion 42 is used for transmitting the reaction force output by the output shaft 21 of the power output assembly 1003 to the backlash elimination bull gear 42; the backlash elimination gearwheel 43 is meshed with the input driving wheel 2, and the backlash elimination gearwheel 43 is used for eliminating backlash of the reaction of the output gear 22 of the power output assembly 1003 with the meshing of the input driving wheel 2.

With continuing reference to fig. 1, fig. 5 and fig. 6, in the present embodiment, the buffering assembly includes: the hydraulic control device comprises a hydraulic piston 45, a hydraulic sealing ring 46, a hydraulic cylinder 47, a pipe joint 48 and a pressure sensor 49, wherein one end 411 of the anti-backlash main shaft 41 is mounted on the gear box body 100 through a third bearing 400, and the other end 412 is movably mounted on the hydraulic cylinder 47 through a fifth bearing 410; the hydraulic piston 45 is movably mounted in the hydraulic cylinder 47, and meanwhile, the hydraulic piston 45 is connected with the anti-backlash main shaft 41 through the fourth bearing 410; the hydraulic seal ring 46 is fixed on the hydraulic piston 45; the hydraulic cylinder 47 is fixed on the gear box body 100, the hydraulic piston 45 moves up and down in the hydraulic cylinder 47, and an oil pipe fitting is installed at the upper end of the hydraulic cylinder 47; the pipe joint 48 is fixed on the hydraulic cylinder 47 and is used for installing a fuel supply pipe and a pressure sensor 49; the pressure sensor 49 is fixed to the pipe joint 48 for transmitting oil pressure data to the numerical control system. The power output assembly 1003 outputs power after changing the speed of the power output by the speed change transmission assembly, and simultaneously transmits the backlash elimination pinion 42 of the adaptive backlash elimination assembly and utilizes the helical tooth angle to press the adaptive backlash elimination assembly to move along the first direction D1, when the pressing force applied to the buffer assembly reaches a first threshold value, the oil pressure acting force in the pipe joint 48 pushes the hydraulic piston 45 to move along the second direction D2, a reaction force is provided for the backlash elimination spindle 41, and under the action of the reaction force and the helical tooth angle, the backlash elimination spindle 41 reversely rotates along the direction of the helical tooth angle, so that the gear of the adaptive backlash elimination assembly reversely engages with the input driving wheel 2 to eliminate the backlash between the gears.

Referring to fig. 7 and 8, fig. 7 is a schematic cross-sectional view of a second embodiment of the adaptive anti-backlash gearbox of the present invention; FIG. 8 is a schematic cross-sectional view of a second embodiment of the adaptive anti-backlash gearbox of the present invention. In this embodiment, the buffer assembly includes a pushing piston 31, a bearing sleeve 32 and a spring 33, the bearing sleeve 32 is fixed on the gear housing 100, the pushing piston 31 is movably disposed in the bearing sleeve 32, the spring 33 is disposed between the bearing sleeve 32 and the pushing piston 31, and the pushing piston 31 and the anti-backlash main shaft 41' are fixed by a fifth bearing.

When the output gear 22 'of the power output assembly outputs power after changing the speed of the power output by the speed change transmission assembly, the backlash eliminating pinion 42' of the adaptive backlash eliminating assembly is transmitted and the adaptive backlash eliminating assembly is pressed by the oblique tooth angle to move along the first direction D1, when the pressing force applied to the buffer assembly reaches a first threshold value, the elastic pressure of the spring 33 pushes the push piston 31 to move along the second direction D2, a reaction force is provided for the backlash eliminating main shaft 41 ', and under the action of the reaction force and the oblique tooth angle, the backlash eliminating main shaft 41' reversely rotates along the direction of the oblique tooth angle, so that the backlash eliminating bull gear 43 'of the adaptive backlash eliminating assembly reversely engages with the input driving wheel 2'.

In addition, an expansion sleeve can be arranged on the anti-backlash main shaft 41', so that the basic backlash of the shaft can be further eliminated.

In this embodiment, the spring 33 pushes the push piston 31, and the push piston 31 pushes the anti-backlash main shaft 41 ', because the anti-backlash shaft is also provided with the expansion sleeve, the basic backlash of the shaft is eliminated, and because the gear set adopts a bevel gear structure, the anti-backlash pinion 42 ' is tightly attached to the output gear 22 '. When the input shaft rotates, the backlash eliminating pinion 42 ' is driven by the output gear 22 ' to rotate, and when the input shaft rotates to an angle and combined backlash occurs, under the action of the spring 33, the whole self-adaptive backlash eliminating assembly moves backwards by a small distance to enable the backlash eliminating pinion 42 ' to be always attached to the output gear 22 ', so that the whole self-adaptive backlash eliminating assembly can rotate slightly under the action of the angle of the inclined teeth of the output gear 22 ' until the backlash is completely eliminated. The backlash after the gear is worn after working for a period of time is automatically eliminated by the same way.

Further, please refer to fig. 2, fig. 3, fig. 5 and fig. 6, the variable-speed transmission assembly 1002 includes a transmission shaft 11, a transmission pinion 12 and a transmission gearwheel 13, the transmission shaft 11 is mounted on the gear housing 100 through a sixth bearing, the transmission shaft 11 is fixedly sleeved on the transmission pinion 12 and the transmission gearwheel 13, the transmission gearwheel 13 is engaged with the input driving wheel 2 to transmit the power input by the input driving wheel 2 to the transmission pinion 12 after changing the speed, and the transmission pinion 12 is engaged with the output gearwheel to transmit the power to the output gearwheel 22.

The power output assembly 1003 includes an output shaft 21 and an output gear 22, the output shaft 21 is mounted on the gear housing 100 through a seventh bearing, and the output gear 22 is fixed to the output shaft 21 in a sleeved manner, and is engaged with the transmission pinion 12 to change the speed of the power of the transmission pinion 12 and transmit the power to the output shaft 21 as output power.

Referring to fig. 9 and 10, fig. 9 is a schematic view illustrating a slag removal assembly disposed in an adaptive anti-backlash gearbox according to an embodiment of the present invention; fig. 10 is a schematic sectional view taken along the line KK in fig. 9. The self-adaptive clearance-eliminating gearbox further comprises a slag-removing assembly, wherein the slag-removing assembly comprises a transmission shaft 59, a bearing seat 60, a belt pulley 57, a rotating shaft 56, a bevel gear 55, a universal joint 54, a steel brush seat 51, a steel brush shaft 52 and a steel wire brush 53, the transmission shaft 59 is mounted on the bearing seat 60 through an eighth bearing 501, and the eighth bearing is a built-in bearing of the bearing seat 60. A first end of the transmission shaft 59 is connected to the input shaft 1 as a power source, and a second end of the transmission shaft 59 is fixed to the pulley 57 to transmit the power of the input shaft 1 to the pulley 57, so as to rotate the pulley 57. The bearing housing 60 is fixed to the gear housing 100. The pulley 57 is installed on the transmission shaft 59 and the rotating shaft 56, and the belt 58 is sleeved on the pulley 57, so that the power is output from the transmission shaft 59 to the bevel gear 55 through the belt 58. The bevel gear 55 is mounted on the rotating shaft 56 and the universal joint 54 to output the power of the rotating shaft 56 to the universal joint 54 in a direction of rotating 90 degrees. The universal joint 54 is mounted on the bevel gear 55 and the steel brush shaft 52, and is used for transmitting the power output by the rotating shaft 56 to the steel brush shaft 52. The steel brush holder 51 is fixed to the gear housing 100. The steel brush shaft 52 is mounted on the steel brush holder 51 through a ninth bearing, a first end of the steel brush shaft 52 located at one side of the steel brush holder 51 is connected to the universal joint 54, a second end of the steel brush shaft 52 located at the other side of the steel brush holder 51 is fixedly connected to the wire brush 53, and the steel brush shaft 52 is used for transmitting power output by the universal joint 54 to the wire brush 53 to enable the wire brush 53 to rotate. The wire brush 53 rotates with the steel brush shaft 52, contacting the member to be cleaned 61, to clean the residue on the member to be cleaned 61 during the rotation. Wherein the element to be cleaned 61 is for example a saw blade.

In addition, the invention also provides a circular sawing machine which comprises the self-adaptive anti-backlash gear box. When the circular sawing machine is used for cutting, the self-adaptive anti-backlash gear box can eliminate the side clearance which cannot be completely engaged due to the influence of the machining precision of the gear and the circular runout, so that the saw blade 61 cannot shake or shake when cutting a workpiece, and the machining precision can be ensured.

However, the invention is not limited thereto, and the adaptive anti-backlash gear box can also be applied to other jigs in the cutting industry, such as vertical and horizontal milling heads. Or an automatic and accurate feeding and discharging arm applied to the field of mechanical arms. Or in the field of transmission, such as a gantry mill feeding gearbox.

In summary, the invention provides a backlash eliminating device, which comprises four sets of transmission shafts, all the gear sets adopt a helical gear structure with helical tooth angles, an input shaft and an output shaft are connected by a backlash eliminating main shaft, and a buffer assembly (the buffer assembly is a flexible pushing device) is added at one end of the backlash eliminating main shaft, so that the backlash eliminating main shaft rotates reversely under the combined action of the helical tooth angles and a reverse acting force provided by the buffer assembly to engage a backlash eliminating gearwheel on the backlash eliminating main shaft with an input driving wheel of the input shaft, thereby solving the problem of combined backlash caused by machining errors or abrasion of various parts such as gears, bearings and the like.

The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. Furthermore, the technical features mentioned in the different embodiments of the present invention described above may be combined with each other as long as they do not conflict with each other. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.

Claims

1. An adaptive anti-backlash gearbox, comprising:

a gear housing;

the power input assembly is arranged in the gear box body and comprises an input shaft, an input driving wheel and a belt pulley, the input shaft is arranged on the gear box body through a first bearing, one end of the input shaft is connected with the belt pulley, the other end of the input shaft is sleeved with the input driving wheel, and the input driving wheel and the input shaft synchronously rotate and are used for outputting power input by the belt pulley;

the gear of the variable-speed transmission assembly is meshed with the input driving wheel and is used for outputting the power input by the power input assembly after changing the speed;

the power output assembly is arranged in the gearbox body and comprises an output gear, and the output gear is meshed with the gear of the variable speed transmission assembly and is used for outputting the power input by the variable speed transmission assembly after the speed is changed; and

the self-adaptive anti-backlash assembly is arranged in the gearbox housing and comprises an anti-backlash main shaft and a buffer assembly, wherein the first end of the anti-backlash main shaft is fixed on the gearbox housing through a second bearing, the buffer assembly is arranged at the second end of the anti-backlash main shaft, a gear of the self-adaptive anti-backlash assembly is meshed with an output gear of the power output assembly, and a gear of the self-adaptive anti-backlash assembly is meshed with the input driving wheel;

the input driving wheel, the gear of the variable speed transmission assembly, the output gear and the gear of the self-adaptive anti-backlash assembly are all helical gears with helical tooth angles, the power output assembly drives the gear of the self-adaptive anti-backlash assembly and utilizes the helical tooth angles to extrude the self-adaptive anti-backlash assembly to move along a first direction while outputting power, when extrusion force received by the buffer assembly reaches a first threshold value, the buffer assembly provides reaction force along a second direction for the anti-backlash main shaft, and under the action of the reaction force and the helical tooth angles, the anti-backlash main shaft can reversely rotate along the direction of the helical tooth angles, so that the gear of the self-adaptive anti-backlash assembly is reversely meshed on the input driving wheel, and the first direction is opposite to the second direction.

2. The adaptive anti-backlash gearbox of claim 1, wherein said damping assembly is a flexible thrust device.

3. The self-adaptive backlash eliminating gearbox of claim 1, wherein the self-adaptive backlash eliminating assembly further comprises a backlash eliminating pinion and a backlash eliminating gearwheel, the backlash eliminating pinion and the backlash eliminating gearwheel are sleeved and fixed on the backlash eliminating main shaft, the backlash eliminating pinion is meshed with the output gear, and the backlash eliminating pinion is used for transmitting a reaction force output by the power output assembly to the backlash eliminating gearwheel; the backlash elimination large gear is meshed with the input driving wheel, and the backlash elimination large gear is used for eliminating backlash of the reaction of the output gear of the power output assembly and the meshing of the input driving wheel.

4. The adaptive anti-backlash gearbox of claim 3, wherein said damping assembly comprises: the hydraulic piston, the hydraulic seal ring, the hydraulic cylinder, the pipe joint and the pressure sensor are arranged on the gear box body, one end of the anti-backlash main shaft is arranged on the gear box body through a third bearing, and the other end of the anti-backlash main shaft is movably arranged on the hydraulic cylinder through a fourth bearing; the hydraulic piston is movably arranged in the hydraulic cylinder, and is connected with the anti-backlash main shaft through the fourth bearing; the hydraulic sealing ring is fixed on the hydraulic piston; the hydraulic cylinder is fixed on the gear box body, the hydraulic piston moves up and down in the hydraulic cylinder, and an oil line pipe fitting is installed at the upper end of the hydraulic cylinder; the pipe joint is fixed on the hydraulic cylinder and used for installing an oil supply pipe and a pressure sensor; the pressure sensor is fixed on the pipe joint and used for transmitting oil pressure data to the numerical control system;

when the power output assembly outputs power, the backlash eliminating pinion of the self-adaptive backlash eliminating assembly is driven, the self-adaptive backlash eliminating assembly is extruded by the aid of the angle of the helical teeth to move along a first direction, when extrusion force applied to the buffer assembly reaches a first threshold value, oil pressure acting force in the pipe joint pushes the hydraulic piston to move along a second direction, reaction force is provided for the backlash eliminating main shaft, and under the action of the reaction force and the angle of the helical teeth, the backlash eliminating main shaft can rotate reversely along the direction of the angle of the helical teeth, so that the backlash eliminating gear of the self-adaptive backlash eliminating assembly is reversely meshed on the input driving wheel.

5. The adaptive anti-backlash gearbox of claim 3, wherein the damping assembly comprises a thrust piston, a bearing housing and a spring, the bearing housing is fixed on the gearbox casing, the thrust piston is movably arranged in the bearing housing, the spring is arranged between the bearing housing and the thrust piston, and the thrust piston and the anti-backlash main shaft are fixed through a fifth bearing;

when the power output assembly outputs power, the backlash eliminating pinion of the self-adaptive backlash eliminating assembly is driven, the self-adaptive backlash eliminating assembly is extruded by the aid of the angle of the helical teeth to move along a first direction, when extrusion force applied to the buffer assembly reaches a first threshold value, the elastic pressure of the spring pushes the pushing piston to move along a second direction, reaction force is provided for the backlash eliminating main shaft, and under the action of the reaction force and the angle of the helical teeth, the backlash eliminating main shaft can rotate reversely along the direction of the angle of the helical teeth, so that a backlash eliminating gear of the self-adaptive backlash eliminating assembly is reversely meshed on the input driving wheel.

6. The adaptive backlash eliminating gearbox of claim 3, wherein the speed change transmission assembly comprises a transmission shaft, a transmission pinion and a transmission gearwheel, the transmission shaft is mounted on the gearbox housing through a sixth bearing, the transmission pinion and the transmission gearwheel are fixedly sleeved on the transmission shaft, and the transmission gearwheel is engaged with the input driving wheel and is used for transmitting power input by the input driving wheel to the transmission pinion after changing the speed of the power; the drive pinion is meshed with the output gear for transmitting power to the output gear.

7. The adaptive backlash elimination gearbox of claim 6, wherein the power take-off assembly further comprises an output shaft mounted to the gearbox housing through a seventh bearing, the output gear being fixedly sleeved on the output shaft and being engaged with the drive pinion for transmitting the power of the drive pinion to the output shaft as the output power after changing the speed of the drive pinion.

8. The adaptive anti-backlash gearbox of claim 1, further comprising a slag removal assembly comprising a drive shaft, a bearing mount, a pulley, a shaft, a bevel gear, a universal joint, a steel brush mount, a steel brush shaft, and a wire brush, wherein,

the transmission shaft is mounted on the bearing seat through an eighth bearing, the first end of the transmission shaft is connected with the input shaft to serve as a power source, and the second end of the transmission shaft is fixed on the belt wheel and used for transmitting the power of the input shaft to the belt wheel so as to enable the belt wheel to rotate;

the bearing seat is fixed on the gear box body;

the belt wheel is arranged on the transmission shaft and the rotating shaft, the belt is sleeved on the belt wheel, and power is output to the bevel gear from the transmission shaft through the belt;

the bevel gear is arranged on the rotating shaft and the universal joint and used for outputting the power of the rotating shaft to the universal joint in a direction of rotating 90 degrees;

the universal joint is arranged on the bevel gear and the steel brush shaft and is used for transmitting the power output by the rotating shaft to the steel brush shaft;

the steel brush seat is fixed on the gear box body;

the steel brush shaft is mounted on the steel brush seat through a ninth bearing, a first end, located on one side of the steel brush seat, of the steel brush shaft is connected with the universal joint, a second end, located on the other side of the steel brush seat, of the steel brush shaft is fixedly connected with the steel wire brush, and the steel brush shaft is used for transmitting power output by the universal joint to the steel wire brush so as to enable the steel wire brush to rotate; and

the steel wire brush rotates along with the steel brush shaft and contacts with the element to be cleaned so as to clean residues on the element to be cleaned in the rotating process.

9. The adaptive anti-backlash gearbox of claim 8, wherein said element to be cleaned is a saw blade.

10. A circular saw machine, characterized in that the circular saw machine comprises: the adaptive anti-backlash gearbox of any one of claims 1 to 9.