CN113958671A - Self-adaptive speed-regulating transmission device - Google Patents

Abstract

The invention discloses an adaptive speed-adjusting transmission device. One end of the transmission shaft is formed as a transmission end, the other end of the transmission shaft is formed as a driving end, and the driving end is provided with a driving disc and a thrust piece; The other end of the output shaft is formed as an output end, and the driven end is provided with a driven disc; the transmission assembly includes an adjustment frame and at least two adjustment balls, and the at least two adjustment balls are both hinged to the circumferential direction of the adjustment frame through the hinge assembly ; At least two adjustment balls are clamped between the drive plate and the driven plate; the adjustment frame is coaxially arranged with the drive plate and the driven plate; the adjustment frame is used to move close to or away from the drive plate under the action of external force to drive the adjustment ball It swings around the axis of the transmission shaft; the thrust piece is used to apply a thrust to the drive disc to press the drive disc against the at least two adjusting balls. The radius of the contact point between the spherical surface of the adjusting ball and the driving disc and the driven disc can be adjusted, so the transmission ratio can be adjusted.

Description

Self-adaptive speed-regulating transmission device

Technical Field

The invention relates to the technical field of mechanical transmission, in particular to a transmission device capable of self-adaptive speed regulation.

Background

At present, in a transmission structure, a power transmission shaft is generally used for driving a driven output shaft to output power, the transmission ratio between the two is generally fixed and cannot be adjusted according to actual needs, so that under the condition of fixed transmission ratio, the transmission ratio is discontinuously changed through gear transmission, the speed is easy to shake when changed, and the stability of the transmission structure is influenced.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a transmission device with self-adaptive speed regulation, the transmission of a transmission shaft and an output shaft can be realized through a driving disk and a driven disk by a transmission component, the contact point radius of the spherical surface of an adjusting ball of the transmission component and the driving disk and the driven disk can be adjusted, and the transmission ratio can be adjusted.

The purpose of the invention is realized by adopting the following technical scheme:

a transmission device capable of self-adaptive speed regulation comprises a transmission shaft, an output shaft and a transmission assembly, wherein one end of the transmission shaft is formed into a transmission end, the other end of the transmission shaft is formed into a driving end, and the driving end is provided with a driving disc and a thrust piece; one end of the output shaft is formed into a driven end, the other end of the output shaft is formed into an output end, and the driven end is provided with a driven disc; the transmission assembly comprises an adjusting frame and at least two adjusting balls, and the at least two adjusting balls are hinged to the circumferential direction of the adjusting frame through a hinge assembly; the at least two adjusting balls are uniformly distributed around the circumference of the central axis of the adjusting frame at intervals; the at least two adjusting balls are clamped between the driving disc and the driven disc; the adjusting frame is coaxially arranged with the driving disc and the driven disc; the adjusting frame is used for moving close to or far away from the driving disc under the action of external force so as to drive the adjusting ball to swing around the axis of the transmission shaft; the thrust piece is used for applying a thrust force to the driving disc so as to enable the driving disc to be pressed on the at least two adjusting balls.

Furthermore, the hinge assembly comprises a hinge shaft and two brackets, and one ends of the two brackets are respectively hinged to two axial ends of the adjusting frame; the hinged shaft penetrates through the adjusting ball, and two ends of the hinged shaft extend out of two ends of the adjusting ball and are respectively hinged to the two supports.

Furthermore, the end part of the bracket is provided with a roller which is hinged with the bracket; the roller is matched with the adjusting frame in a rolling manner.

Furthermore, the transmission assembly further comprises an adjusting shaft, one end of the adjusting shaft is connected to the adjusting frame, and the other end of the adjusting shaft penetrates through the driven disc and penetrates through the output shaft to extend out of the output end; the part of the adjusting shaft extending out of the output end is formed into an adjusting end, and the adjusting end can drive the adjusting shaft to move along the axial direction when being stressed.

Further, the adjusting end is provided with an external thread section; the output end is provided with an internal thread section; the external thread section is in threaded fit with the internal thread section.

Furthermore, the outer surface of the output end is provided with a plurality of friction blocks and friction cylinders, and the friction blocks are fixedly connected to the outer surface of the output end and are circumferentially distributed around the central axis of the output shaft; the friction blocks are used for moving along the radial direction of the output shaft when the output shaft rotates; the friction cylinder is sleeved outside the friction blocks and is in friction fit with the friction blocks when the output end rotates.

Furthermore, the sleeve is sleeved on the outer surface of the output end, and a plurality of friction struts are arranged outside the sleeve; the friction block is provided with an insertion hole; the friction blocks are sleeved outside the sleeve, so that the friction supports are inserted into the insertion holes of the friction blocks.

Furthermore, the thrust piece comprises an installation cylinder and a plurality of elastic sheets, the installation cylinder is sleeved outside the transmission shaft, and one end of each elastic sheet is connected to the end part of the installation cylinder; the other end of the elastic sheet is abutted against the driving disc.

Further, the thrust piece also comprises a thrust bearing, and the thrust bearing is sleeved outside the transmission shaft and is abutted to the mounting cylinder.

Further, the flexure strip includes first linkage segment and second linkage segment, the one end of first linkage segment connect in an installation section of thick bamboo, the other end of first linkage segment connect in the one end of second linkage segment, the other end of second linkage segment is kept away from first linkage segment slope and with driving-disc butt.

Compared with the prior art, the invention has the beneficial effects that: the driving disk and the driven disk can be driven by the plurality of adjusting balls of the transmission assembly, when the adjusting frame moves on the axis, the adjusting balls can deflect by a certain angle, so that the circumferential radius of the contact point of the adjusting balls and the rotating plane of the driving disk is increased or decreased, and the circumferential radius of the rotating plane of the contact point of the adjusting balls and the driven disk is decreased or increased, so that the transmission ratio between the driving disk and the driven disk is changed.

Drawings

FIG. 1 is a cross-sectional view of a transmission of the present invention;

FIG. 2 is a schematic view of a partially exploded structure of the transmission of the present invention;

FIG. 3 is an exploded view of the drive shaft of the transmission of the present invention;

FIG. 4 is an exploded view of the output shaft of the transmission of the present invention;

FIG. 5 is a schematic structural view of the transmission assembly of the present invention;

FIG. 6 is a partial schematic view of the transmission assembly of the present invention;

FIG. 7 is a partial schematic view of the transmission assembly of the present invention;

FIG. 8 is a schematic structural view of the operating principle of the transmission of the present invention;

FIG. 9 is a schematic structural view of the operating principle of the transmission of the present invention;

fig. 10 is a schematic view of the operating principle of the transmission of the present invention.

In the figure: 10. a drive shaft; 11. a drive disc; 121. mounting the cylinder; 122. an elastic sheet; 123. a thrust bearing; 20. an output shaft; 21. a driven plate; 22. a friction block; 221. inserting holes; 23. a friction cylinder; 24. a sleeve; 241. a friction strut; 30. a transmission assembly; 31. an adjusting bracket; 32. adjusting the ball; 33. hinging a shaft; 34. a support; 341. a roller; 35. an adjustment shaft; 351. an external threaded section.

Detailed Description

The invention will be further described with reference to the accompanying drawings and the detailed description below:

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

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

An adaptive speed-adjusting transmission device as shown in fig. 1-10 comprises a transmission shaft 10, an output shaft 20 and a transmission assembly 30, wherein one end of the transmission shaft 10 is formed as a transmission end which can be connected with an external power structure, and the other end of the transmission shaft 10 is formed as a driving end at which a driving disc 11 and a thrust piece are arranged. One end of the output shaft 20 is formed as a driven end, the other end of the output shaft 20 is formed as an output end, and the driven end is provided with a driven disc 21.

The transmission assembly 30 comprises an adjusting bracket 31 and at least two adjusting balls 32, wherein the at least two adjusting balls 32 are hinged to the circumferential direction of the adjusting bracket 31 through a hinge assembly, and the at least two adjusting balls 32 are uniformly distributed around the circumference of the central axis of the adjusting bracket 31 at intervals, so that the at least two adjusting balls 32 can be uniformly distributed on the circumferential direction of the adjusting bracket 31, and the at least two adjusting balls 32 are clamped between the driving disc 11 and the driven disc 21; the transmission force between the driving disc 11 and the driven disc 21 is made smoother.

The adjusting frame 31 is arranged coaxially with the driving disc 11 and the driven disc 21; the adjusting bracket 31 is used for moving close to or far away from the driving disc 11 under the action of external force so as to drive the adjusting ball 32 to swing around the axis of the transmission shaft 10; the thrust member is used to apply a thrust force to the driving disk 11 to press the driving disk 11 against the at least two adjusting balls 32.

Specifically, the specific operation principle of the transmission assembly 30 is shown in fig. 8, 9 and 10: the driving disk 11 is in spline fit with the driving end of the transmission shaft 10, so that the rotating speed of the transmission shaft 10 and the rotating speed of the driving disk 11 are both omega₁(ii) a In addition, the driven disc 21 is connected with the output shaft 20 through a flat key, so that the rotating speeds of the driven disc 21 and the output shaft 20 are both omega₂The thrust member can provide enough extrusion force F to the driving disk 11, so that no slip occurs between the adjusting ball 32 and the driving disk 11 and the driven disk 21, and the driving disk 11 rotates along with the transmission shaft 10, so that the adjusting ball 32 and the driving disk 11 rotate around the hinge assembly under the action of static friction force, and the rotation speed is omega₀。

During normal driving of the transmission assembly 30, see fig. 9, the circumferential radius r of the plane of rotation of the contact point of the adjusting ball 32 and the drive disk 11₁Radius r of the circumference of the plane of rotation of the contact point of the adjusting ball 32 with the driven disk 21₂Equal, so that the adjusting balls 32 contact the two contact points O of the driving disk 11 and the driven disk 21₁，O₂All have the linear velocity of omega₁Xr, drive speed ω of disc 11₁With the rotational speed omega of the driven disc 21₂I.e. equal, the transmission ratio i between the driving disc 11 and the driven disc 21 in the transmission assembly 30 is 1: 1;

when the transmission assembly 30 is under-actuated, referring to fig. 8, the adjusting bracket 31 can be adjusted to drive the adjusting bracket 31 to move close to the driving disc 11, the adjusting bracket 31 deflects to the left by an angle phi, and the contact point O of the adjusting ball 32 and the driving disc 11 is at this moment₁Radius r of the circumference of the plane of rotation₁Increasing, adjusting the contact point O of the ball 32 with the driven disk 21₂Radius r of the circumference of the plane of rotation₂Reduced, the drive disk 11 drives the adjusting ball 32 to rotate around the hinge axis, the contact point O₁Linear velocity of₁X R, the rotating speed of the steel ball rotating around the hinge shaft is omega₀And ω is₀＝ω₁×R/r₁While the adjusting ball 32 drives the driven disk 21 to rotate, the contact point O₂Linear velocity of₀×r₂At this time, the rotation speed of the output shaft 20 is ω_{2, and}ω₂＝(ω₀×r₂)/R＝((ω₁×R/r₁)×r₂)/R＝ω₁×r₂/r₁since r1 > r2, ω is₂＜ω₁The transmission ratio i is ω₁/ω₂＝r₁/r₂＞1。

When the transmission assembly 30 is overdriven, referring to fig. 10, the adjusting bracket 31 is driven to move close to the driving disk 11, the adjusting bracket 31 deflects to the right hand by an angle phi, and the contact point O of the adjusting ball 32 and the driving disk 11 is formed₁Radius r of the circumference of the plane of rotation₁Reduce, adjust the ball 32 and driven disk 21 contact point O₂Radius r of contact circumference between planes of rotation₂The rotation speed of the output shaft 20 is increased to be omega₂＝ω₁×r₂/r₁At this time, since r₁＜r₂Therefore ω is₂＞ω₁The transmission ratio i is ω₁/ω₂＝r₁/r₂＜1。

It should be noted that, since the driving disk 11 and the driven disk 21 can be driven by the plurality of adjusting balls 32 of the driving assembly 30, when the adjusting bracket 31 moves on the axis, the adjusting balls 32 can swing by a certain angle, so that the circumferential radius at the contact point of the adjusting balls 32 and the rotation plane of the driving disk 11 increases or decreases, and the circumferential radius at the contact point of the adjusting balls 32 and the driven disk 21 decreases or increases, thereby realizing the change of the transmission ratio between the driving disk 11 and the driven disk 21, and since the deflection angle of the adjusting bracket 31 is continuously changed, the transmission ratio between the driving disk 11 and the driven disk 21 is also continuously changed, so that the stepless speed change between the driving disk 11 and the driven disk 21 can be realized, and the condition of shaking occurring when the speed is changed under the condition of fixing the transmission ratio is avoided, and the speed change is more gradual.

Further, the hinge assembly in this embodiment includes a hinge shaft 33 and two brackets 34, one ends of the two brackets 34 are respectively hinged to two axial ends of the adjusting bracket 31, the hinge shaft 33 penetrates through the adjusting ball 32, and two ends of the hinge shaft 33 extend from two ends of the adjusting ball 32 and are respectively hinged to the two brackets 34.

On the basis of the structure, the adjusting balls 32 can be respectively hinged on the two brackets 34 through the hinge shafts 33, and then the two brackets 34 are hinged on the adjusting frame 31 as a mounting base, so that when the adjusting balls 32 move along the axial direction of the adjusting frame 31, the adjusting balls 32 can drive the hinge shafts 33 to deflect in the axial direction, the circumferential radius of the rotating plane at the contact point of the adjusting balls 32 and the driving disc 11 is increased or decreased, the circumferential radius of the rotating plane at the contact point of the adjusting balls 32 and the driven disc 21 is decreased or increased, the transmission ratio between the driving disc 11 and the driven disc 21 is changed, and the mounting structure of the adjusting balls 32 is relatively stable.

Further, a roller 341 may be hinged to an end of the bracket 34; the roller 341 is in rolling fit with the adjusting frame 31, so that when the adjusting frame 31 moves along the axial direction, the roller 341 can be in rolling fit with the adjusting frame 31, the deflection of the bracket 34 is facilitated, and the deflection is smoother.

Further, the transmission assembly 30 further includes an adjusting shaft 35, one end of the adjusting shaft 35 is connected to the adjusting bracket 31, the other end of the adjusting shaft 35 penetrates through the driven plate 21 and is inserted into the output shaft 20 to extend from the output end, a portion of the adjusting shaft 35 extending from the output end is formed as an adjusting end, and the adjusting end can drive the adjusting shaft 35 to move in the axial direction when being stressed.

When the adjusting frame 31 is adjusted to move axially, the adjusting end can be manually driven by a person, and the adjusting shaft 35 is driven to reciprocate axially, so that manual operation is facilitated.

Specifically, the external thread section 351 may be arranged at the adjusting end, the internal thread section is arranged at the output end, the external thread section 351 and the internal thread section are in thread fit, when the adjusting frame 31 is adjusted to move axially, the adjusting end can be rotated, the external thread section 351 at the adjusting end and the internal thread section are in thread fit, and axial movement can be realized in the rotating process, so that the thread fit can limit the axial movement of the adjusting shaft 35, and only when a human hand rotates, the adjusting shaft can move.

Of course, on the basis of the structure without the external thread section 351 and the internal thread section, the adjusting shaft 35 can directly slide in the output shaft 20, can be pushed by a hand to slide when sliding is needed, and can be fixed by an external connecting piece when sliding is not needed.

In addition, the internal thread section arranged at the output end can be formed by a nut structure arranged at the output end.

Further, referring to fig. 4, the outer surface of the output end may be further provided with a plurality of friction blocks 22 and a friction cylinder 23, the plurality of friction blocks 22 are fixedly connected to the outer surface of the output end, and the plurality of friction blocks 22 may be circumferentially distributed around the central axis of the output shaft 20. The plurality of friction blocks 22 are movable in a radial direction of the output shaft 20 when the output shaft 20 rotates, and the friction cylinder 23 is fitted around the plurality of friction blocks 22 and frictionally engages with the friction blocks 22 when the output shaft rotates.

On the basis of the structure, when the speed of the output shaft 20 is too fast, the friction blocks 22 can move outwards along the radial direction of the output shaft 20 under the action of the centrifugal force of the output shaft 20, at the moment, the friction blocks 22 can be in friction contact with the inner wall of the friction cylinder 23, the surface friction of the output shaft 20 is increased, certain resistance is provided for the output shaft 20, the output shaft 20 is further decelerated, the output speed of the output shaft 20 is prevented from being too fast, and therefore the rotating speed is relatively stable.

Specifically, a friction plate may be provided on the inner wall of the friction cylinder 23 to be frictionally engaged with the friction block 22.

Further, the outer surface of the output end is sleeved with a sleeve 24, the sleeve 24 can be fixed on the key groove of the output end through a flat key, and after the sleeve 24 is assembled, nut structures can be arranged at two ends of the sleeve 24 for further fixing.

Specifically, a plurality of friction support columns 241 are arranged outside the sleeve 24, and insertion holes 221 are correspondingly arranged on the friction blocks 22; the friction blocks 22 are sleeved outside the sleeve 24, so that the friction supports 241 are inserted into the insertion holes 221 of the friction blocks 22, and thus, the friction supports 241 can be slidably inserted into the insertion holes 221 of the friction blocks 22, when the output shaft 20 rotates, centrifugal force can drive the friction blocks 22 to move in the radial direction, and the friction supports 241 can slide in the insertion holes 221 to guide the friction blocks 22 to move stably in the radial direction, so that the friction blocks 22 are prevented from being disengaged from the output shaft 20, and the radial movement structure is stable.

Of course, the friction block 22 may be directly connected to the outer surface of the output shaft 20 through an elastic block without the sleeve 24, and the friction block may be spread by centrifugal force and frictionally engaged with the friction cylinder 23.

Further, referring to fig. 3 and 5, the thrust member includes a mounting tube 121 and a plurality of elastic pieces 122, the mounting tube 121 is sleeved outside the transmission shaft 10, one end of each of the elastic pieces 122 is connected to an end of the mounting tube 121, and the other end of each of the elastic pieces 122 abuts against the driving disc 11, when the thrust member is assembled, the mounting tube 121 can be sleeved outside the transmission shaft 10, and the elastic pieces 122 are clamped between the driving disc 11 and the mounting tube 121 in a compressed state, so that the driving disc 11 can be driven to abut against the adjusting balls 32 by the elastic stress provided by the elastic pieces 122, and the adjusting balls 32 abut against the driven disc 21, thereby realizing transmission. In addition, because the elastic stress provided by the elastic piece 122 has flexibility, the transmission structure is more flexible, and the occurrence of the blocking condition in the transmission process is reduced.

Further, thrust spare still includes thrust bearing 123, thrust bearing 123 suit is outside transmission shaft 10 and with installation section of thick bamboo 121 butt, when the assembly, a plurality of flexure strips 122 can be suit between driving-disc 11 and installation section of thick bamboo 121, through thrust bearing 123 and installation section of thick bamboo 121, make flexure strip 122 compressed and produce certain deformation, transmit the certain extrusion force of driving-disc 11, transmission shaft 10 rotates output more nimble, and the thrust that provides is more stable.

More specifically, the elastic piece 122 includes a first connection section and a second connection section, one end of the first connection section is connected to the mounting tube 121, the other end of the first connection section is connected to one end of the second connection section, and the other end of the second connection section is away from the first connection section and inclines and abuts against the driving disc 11, so that the second connection section can be abutted against the driving disc 11 in an inclined state, and the application surface is larger than the application surface of the straight line top pressure, and the applied elastic force is more stable.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.

Claims (10)

1. A transmission device for self-adaptive speed regulation, characterized in that it comprises a transmission shaft, an output shaft and a transmission assembly, one end of the transmission shaft is formed as a transmission end, and the other end of the transmission shaft is formed as a driving end, so The drive end is provided with a drive disc and a thrust piece; one end of the output shaft is formed as a driven end, the other end of the output shaft is formed as an output end, and the driven end is provided with a driven disc; the transmission assembly It includes an adjusting frame and at least two adjusting balls, and the at least two adjusting balls are both hinged on the circumference of the adjusting frame through a hinge assembly; the at least two adjusting balls are evenly spaced around the circumference of the central axis of the adjusting frame ; the at least two adjusting balls are clamped between the driving disc and the driven disc; the adjusting frame is coaxially arranged with the driving disc and the driven disc; the adjusting frame is used for Under the action of external force, it moves close to or away from the drive disc, so as to drive the adjusting ball to swing around the axis of the transmission shaft; the thrust member is used to apply a thrust to the drive disc to press the drive disc against the axis of the drive shaft. on the at least two adjustment balls. 2 . The self-adaptive speed regulation transmission device according to claim 1 , wherein the hinge assembly comprises a hinge shaft and two brackets, and one end of the two brackets is respectively hinged to the axial direction of the adjustment frame. 3 . two ends; the hinge shaft is threaded into the adjusting ball, and the two ends of the hinge shaft are protruded from the two ends of the adjusting ball and are hinged on two brackets respectively. 3 . The self-adaptive speed-adjusting transmission device according to claim 2 , wherein a roller is hinged on the end of the bracket; and the roller is in rolling fit with the adjusting frame. 4 . 4 . The transmission device for adaptive speed regulation according to claim 1 , wherein the transmission assembly further comprises an adjustment shaft, one end of the adjustment shaft is connected to the adjustment frame, and the other end of the adjustment shaft is connected to the adjustment frame. 5 . Passing through the driven plate and passing through the output shaft to protrude from the output end; the part of the adjusting shaft protruding from the output end is formed as an adjusting end, and the adjusting end can drive the adjusted end when it is under force. The adjusting shaft moves in the axial direction. 5. The transmission device for adaptive speed regulation according to claim 4, wherein the adjusting end is provided with an outer thread segment; the output end is provided with an inner thread segment; the outer thread segment is connected with the inner thread segment. Threaded segment thread fit. 6 . The self-adaptive speed-regulated transmission device according to claim 1 , wherein the outer surface of the output end is provided with a plurality of friction blocks and a friction cylinder, and the plurality of friction blocks are fixedly connected to the The outer surface of the output end is distributed circumferentially around the central axis of the output shaft; a plurality of friction blocks are used to move along the radial direction of the output shaft when the output shaft rotates; the friction cylinder is sleeved outside the plurality of friction blocks and is When the output end rotates, it frictionally fits with the friction block. 7 . The self-adaptive speed-adjusting transmission device according to claim 6 , wherein a sleeve is sleeved on the outer surface of the output end, and a plurality of friction struts are arranged outside the sleeve; Mounting holes; a plurality of friction blocks are sheathed outside the sleeve so that the plurality of friction struts are inserted into the insertion holes of the plurality of friction blocks. 8 . The self-adaptive speed-adjusting transmission device according to claim 1 , wherein the thrust member comprises a mounting cylinder and a plurality of elastic sheets, and the mounting cylinder is sleeved outside the transmission shaft. 9 . , one end of the plurality of elastic sheets is connected to the end of the mounting cylinder; the other end of the elastic sheets is abutted on the drive disk. 9 . The self-adaptive speed regulation transmission device according to claim 8 , wherein the thrust member further comprises a thrust bearing, and the thrust bearing is sleeved on the outside of the transmission shaft and abuts with the mounting cylinder. 10 . 10. The transmission device for adaptive speed regulation according to claim 8, wherein the elastic sheet comprises a first connecting section and a second connecting section, and one end of the first connecting section is connected to the mounting barrel , the other end of the first connection segment is connected to one end of the second connection segment, and the other end of the second connection segment is inclined away from the first connection segment and abuts against the drive disk.

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