CN106239258A - A kind of worm-cam indexing mechanism - Google Patents
A kind of worm-cam indexing mechanism Download PDFInfo
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- CN106239258A CN106239258A CN201510979540.3A CN201510979540A CN106239258A CN 106239258 A CN106239258 A CN 106239258A CN 201510979540 A CN201510979540 A CN 201510979540A CN 106239258 A CN106239258 A CN 106239258A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 20
- 230000033001 locomotion Effects 0.000 claims abstract description 91
- 230000000284 resting effect Effects 0.000 claims abstract description 46
- 238000009826 distribution Methods 0.000 claims abstract description 3
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 230000001133 acceleration Effects 0.000 claims description 7
- 241000237858 Gastropoda Species 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
- B23Q16/02—Indexing equipment
- B23Q16/022—Indexing equipment in which only the indexing movement is of importance
Abstract
A kind of worm-cam indexing mechanism, including worm-cam and roller dish, worm-cam includes worm screw and the cam being installed on worm screw, and the outside of this cam offers conduit, and this conduit is in the shape of a spiral；This roller dish is provided with multiple roller, the plurality of roller is along the circumferentially-spaced distribution of roller dish, this roller is for moving in conduit, and this conduit is sequentially provided with engaging-in section, first section of resting, sinusoidal accelerated motion section, movement at the uniform velocity section, sinusoidal retarded motion section, second section of resting and nibble out section from one end to the other end.The present invention can with the mass motion performance of hoisting mechanism, and avoid roller engaging-in nibble out conduit time produce and interfere.
Description
Technical field
The present invention relates to a kind of worm-cam indexing mechanism.
Background technology
Conventional worm-cam indexing mechanism, its composition specifically include that worm-cam, roller dish,
Roller, roller is equidistantly arranged on the radial circumference of roller dish.Worm-cam is provided with conduit,
Conduit then can be divided into and rests conduit and motion conduit.During work, have two rollers all the time with conduit
Engage each other.When worm-cam is driven in rotation in original place, if roller is engaged in and rests conduit,
Roller dish transfixion；If roller is engaged in motion conduit, roller dish promotes in the engagement of conduit
Lower generation gyration；The most just the intermittent movement (rotation) of roller dish can be realized.
Because intermittent movement (rotation) is respond well, above-mentioned worm-cam indexing mechanism is applied
Extensively, the tool magazine that is such as applied in machining equipment, index table etc..
While it is true, for keeping roller and conduit good engagement relation operationally, conduit shape
Shape is complicated, processing difficulties, to have produced once at present worm-cam and conduit thereof, it is necessary to make
With apparatus expensive, the five-axis robot machine of processor complexity, processing cost is high, it is difficult to great Liang Sheng
Produce.
For manufacturing difficulty, this is not enough, also occurs in that some methods improved, such as by worm screw
The conduit bottom surface semicircular in shape curved surface of cam, the roller with conduit with motion matching relationship is also adopted
Contour structures with semicircle sphere.So, when the conduit of machining worm cam, only need to use
There is the cutter collocation four-shaft processor of semicircle cutting edge.Therefore, improvement knot is used
Structure, worm-cam 1 is easy to manufacture quickly, is suitable to produce in a large number and can reduce production cost.So
And, the most the curve movement of worm-cam not being improved, exercise performance has much room for improvement.
Meanwhile, roller easily produces interference engaging-in with when nibbling out conduit.
Summary of the invention
For the deficiencies in the prior art, the purpose of the present invention is intended to provide a kind of worm-cam to divide
Degree mechanism, the mass motion performance of hoisting mechanism, and avoid roller engaging-in nibble out conduit time
Produce and interfere.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of worm-cam indexing mechanism, including worm-cam and roller dish, worm-cam includes
Worm screw and the cam being installed on worm screw, the outside of this cam offers conduit, and this conduit is spiral shell
Rotation shape；This roller dish is provided with multiple roller, and the plurality of roller is along circumferentially-spaced point of roller dish
Cloth, this roller is for moving in conduit:
This conduit is sequentially provided with engaging-in section from one end, first section of resting, sinusoidal accelerates to the other end
Motor segment, movement at the uniform velocity section, sinusoidal retarded motion section, second section of resting and nibble out section, this is nibbled
The section of entering and the groove width nibbling out section are all higher than the width of this roller, this first section of resting, sinusoidal acceleration
The groove width of motor segment, movement at the uniform velocity section, sinusoidal retarded motion section and second section of resting is equal to this
The width of roller, and when roller is positioned at this first section of resting, sinusoidal accelerated motion section, constant speed
Motor segment, sinusoidal retarded motion section and second rest intrasegmental part time, roller be centrally located at this groove
On the centrage in road；
Set this engaging-in section, first section of resting, sinusoidal accelerated motion section, movement at the uniform velocity section, just
String retarded motion section, second section of resting and nibble out section and be respectively as follows: θ around the rotational angle of Z axis4、θ3、θ2、θ1、θ5、θ6And θ7, and θ5=θ2、θ6=θ3、θ7=θ4；Its
In this Z axis be the rotating shaft of this cam；
Meanwhile, the rotational angle θ of conduit motor segment is set0, this conduit motor segment includes sine
Accelerated motion section, movement at the uniform velocity section and sinusoidal retarded motion section；Conduit sine accelerated motion section exists
The displacement of Z-direction is h1；Conduit sine retarded motion section is h in the displacement of Z-direction2；
The centre-to-centre spacing of adjacent rollers is H；The radius of roller centre circle is R；Roller number is N；Snail
Bar cam is D with the centre-to-centre spacing of roller dish；
With the central point of worm-cam as initial point, (r, θ, z), θ is to set up cylindrical coordinate system O
The conduit centrage anglec of rotation about the z axis；
This conduit centrage of engaging-in section meets below equation in the projection of Z-direction:
Z (θ)=-R sin{2 π/N-arcsin [z (θ+2 π)/R] }, θ=[-(θ0/2+θ3+θ4),-(θ0
/2+θ3)]…(1)
The conduit centrage of this first section of resting meets below equation in the projection of Z-direction:
Z (θ)=-H/2, θ=[-(θ0/2+θ3),-θ0/2]…(2)
The conduit centrage of this sine accelerated motion section meets in the projection of Z-direction with lower section
Journey:
Z (θ)=-H/2+h1·{(θ+θ0/2)/θ2-sin[π(θ+θ0/2)/θ2]/π }, θ=[-θ0/2,-θ0
/2+θ2]…(3)
The conduit centrage of this constant speed motor segment meets below equation in the projection of Z-direction:
Z (θ)=-H/2+h1+(H-h1-h2)(θ+θ0/2-θ2)/(θ0-2θ2), θ=[-θ0/2+θ2,θ0/2-
θ2]…(4)
The conduit centrage of this sine retarded motion section meets in the projection of Z-direction with lower section
Journey:
Z (θ)=H/2-h2·{(θ0/2-θ)/θ2-sin[π(θ0/2-θ)/θ2]/π }, θ=[θ0/2-θ2,
θ0/2]…(5)
The conduit centrage of this second section of resting meets below equation in the projection of Z-direction:
Z (θ)=H/2, θ=[θ0/2,θ0/2+θ3]…(6)
This is nibbled out the conduit centrage of section and meets below equation in the projection of Z-direction:
Z (θ)=R sin{2 π/N+arcsin [z (θ+2 π)/R] }, θ=[θ0/2+θ3,θ0/2+θ3+θ4]
…(7)
This conduit centrage meets below equation in the projection of the radial section of this cam:
R (θ)=D-R cos{arcsin [z (θ)/R] } ... (8)
Wherein, r is that conduit centrage point in the projection of this cam radial section is to Z axis
Distance；
And, θ1、θ2、θ3、θ4For positive number；θ0=θ1+2θ2；θ0+θ3=2 π；
H=2 R sin (π/N)；
h1=h2=2 θ2·H/(θ0-θ2)。
Further, the radial section semicircular in shape of this conduit.
Further, the side of this roller is arc surface, this arc surface for this conduit inside
Wall contacts.
The beneficial effects of the present invention is:
Compared to prior art, the worm-cam indexing mechanism of the present invention, its worm-cam uses
The correction movement at the uniform velocity curve that movement at the uniform velocity and sinusoidal acceleration motion combine, mechanism is whole
In motor process, both without rigid shock also without soft impulse, stable movement, speed is high, indexing
Accurately, the mass motion performance of hoisting mechanism；And, the design of conduit has taken into full account roller
When engaging-in nibbling out with the position relationship of conduit, it is to avoid produce and interfere.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 to Fig. 4 is the worm-cam structural representation three different operating states；
Fig. 5 is the structural representation (demonstrating conduit centrage) of worm-cam；
Fig. 6 is the conduit centrage 111 perspective view at cam radial section；
Fig. 7 is the displacement schematic diagram with polar radius r of the Z-direction of conduit centrage 111；
Fig. 8 is movement velocity and the accelerating curve schematic diagram of roller；
Wherein: 1, worm-cam；101, worm screw；102, cam；11, conduit；111、
Conduit centrage；11ab, engaging-in section；11bc, first section of resting；11cd, sinusoidal acceleration are transported
Dynamic section；11de, movement at the uniform velocity section；11ef, sinusoidal retarded motion section；11fg, second rest
Section；11gh, nibble out section；2, roller dish；21, roller；L, the width of roller；H, phase
The centre-to-centre spacing of adjacent two rollers；The radius of R, roller centre circle；D, worm-cam and roller dish
Centre-to-centre spacing.
Detailed description of the invention
Below, in conjunction with accompanying drawing and detailed description of the invention, the present invention is described further:
As shown in Figures 1 to 6, the worm-cam indexing mechanism of the present invention, including worm-cam 1
With roller dish 2, worm-cam 1 includes worm screw 101 and the cam 102 being installed on worm screw 101,
The outside of this cam 102 offers conduit 11, and this conduit 11 is in the shape of a spiral；Set on this roller dish 2
Have multiple roller 21, the plurality of roller 21 along the circumferentially-spaced distribution of roller dish 2, this roller 21
For moving in conduit 11；
This conduit 11 is sequentially provided with engaging-in section of 11ab, first section of resting from one end to the other end
11bc, sinusoidal accelerated motion section 11cd, movement at the uniform velocity section 11de, sinusoidal retarded motion section 11ef,
Second section of resting 11fg and nibble out a section 11gh, this engaging-in section of 11ab and nibble out the groove of section 11gh
The wide width being all higher than this roller 21, therefore, this roller 21 is engaging-in and nibble out this conduit
When 11, can not contact with conduit 11, so that worm-cam 1 will not promote this roller dish
2 motions, this first section of resting 11bc, sinusoidal accelerated motion section 11cd, movement at the uniform velocity section 11de,
The groove width of sinusoidal retarded motion section 11ef and the second section of resting 11fg is equal to this roller 21
Width L, and when roller 21 be positioned at this first section of resting 11bc, sinusoidal accelerated motion section 11cd,
Movement at the uniform velocity section 11de, sinusoidal retarded motion section 11ef and the inside of the second section of resting 11fg
Time, roller 21 is centrally located on the conduit centrage 111 of conduit 11；
Set this engaging-in section of 11ab, the first section of resting 11bc, sinusoidal accelerated motion section 11cd,
Movement at the uniform velocity section 11de, sinusoidal retarded motion section 11ef, the second section of resting 11fg and nibble out section
11gh is respectively as follows: θ around the rotational angle of Z axis4、θ3、θ2、θ1、θ5、θ6And θ7, and θ5=θ2、θ6=θ3、θ7=θ4；Wherein this Z axis is the rotating shaft of this cam 102
(in the present embodiment, θ4、θ3、θ2、θ1、θ5、θ6And θ7It is respectively this engaging-in section
11ab, the first section of resting 11bc, sinusoidal accelerated motion section 11cd, movement at the uniform velocity section 11de,
Sinusoidal retarded motion section 11ef, conduit corresponding with nibbling out section 11gh for the second section of resting 11fg
Centrage 111 is around the rotational angle of Z axis)；
Meanwhile, the rotational angle θ of conduit motor segment is set0(in the present embodiment, θ0For conduit
Conduit centrage 111 corresponding to motor segment is around the rotational angle of Z axis), this conduit motor segment
Including sinusoidal accelerated motion section 11cd, movement at the uniform velocity section 11de, sinusoidal retarded motion section 11ef；
Conduit sine accelerated motion section 11cd is h in the displacement of Z-direction1；Conduit sine slows down and transports
Dynamic section is h in the displacement of Z-direction2；The centre-to-centre spacing of adjacent rollers 21 is that (conduit moves H
Section is also H in the displacement of Z-direction)；The radius of roller 21 center circle is R；Roller 21
Number is N；Worm-cam 1 is D with the centre-to-centre spacing of roller dish 2；
With the central point of worm-cam 1 as initial point, being axially Z axis, this initial point is positioned on Z axis,
This Z axis is the rotating shaft of this cam 102, and (r, θ, z), θ is conduit to set up cylindrical coordinate system O
Centrage 111 anglec of rotation about the z axis；
This conduit centrage of engaging-in section meets below equation in the projection of Z-direction:
Z (θ)=-R sin{2 π/N-arcsin [z (θ+2 π)/R] }, θ=[-(θ0/2+θ3+θ4),-(θ0
/2+θ3)]…(1)
The conduit centrage of this first section of resting meets below equation in the projection of Z-direction:
Z (θ)=-H/2, θ=[-(θ0/2+θ3),-θ0/2]…(2)
The conduit centrage of this sine accelerated motion section meets in the projection of Z-direction with lower section
Journey:
Z (θ)=-H/2+h1·{(θ+θ0/2)/θ2-sin[π(θ+θ0/2)/θ2]/π }, θ=[-θ0/2,-θ0
/2+θ2]…(3)
The conduit centrage of this constant speed motor segment meets below equation in the projection of Z-direction:
Z (θ)=-H/2+h1+(H-h1-h2)(θ+θ0/2-θ2)/(θ0-2θ2), θ=[-θ0/2+θ2,θ0/2-
θ2]…(4)
The conduit centrage of this sine retarded motion section meets in the projection of Z-direction with lower section
Journey:
Z (θ)=H/2-h2·{(θ0/2-θ)/θ2-sin[π(θ0/2-θ)/θ2]/π }, θ=[θ0/2-θ2,
θ0/2]…(5)
The conduit centrage of this second section of resting meets below equation in the projection of Z-direction:
Z (θ)=H/2, θ=[θ0/2,θ0/2+θ3]…(6)
This is nibbled out the conduit centrage of section and meets below equation in the projection of Z-direction:
Z (θ)=R sin{2 π/N+arcsin [z (θ+2 π)/R] }, θ=[θ0/2+θ3,θ0/2+θ3+θ4]
…(7)
This conduit centrage meets below equation in the projection of the radial section of this cam:
R (θ)=D-R cos{arcsin [z (θ)/R] } ... (8)
Wherein, r is that conduit centrage point in the projection of this cam radial section is to Z axis
Distance (hereafter r being referred to as polar radius)；
And, θ1、θ2、θ3、θ4For positive number；θ0=θ1+2θ2；θ0+θ3=2 π；
H=2 R sin (π/N)；
h1=h2=2 θ2·H/(θ0-θ2)。
The worm-cam indexing mechanism of the present invention, its worm-cam uses movement at the uniform velocity and sine to add
Speed motion combine correction movement at the uniform velocity curve, mechanism in whole motor process, both without
Rigid shock is also without soft impulse, stable movement, and speed is high, and indexing is accurately；And, conduit
Design taken into full account roller when engaging-in nibbling out with the position relationship of conduit, it is to avoid produce dry
Relate to.
In the drawings, a is the starting point of engaging-in section of 11ab, and b is that the terminal of engaging-in section of 11ab (is simultaneously
The starting point of the first section of resting 11bc), c is that the terminal of the first section of resting 11bc is (simultaneously for just
The starting point of string accelerated motion section 11cd), d is that the terminal of sinusoidal accelerated motion section 11cd is (same
Time be movement at the uniform velocity section 11de starting point), e be movement at the uniform velocity section 11de terminal (simultaneously
For the starting point of sinusoidal retarded motion section 11ef, f is that the terminal of sinusoidal retarded motion section 11ef is (same
Time be the starting point of the second section of resting 11fg), g be the terminal of the second section of resting 11fg (simultaneously
For nibbling out the starting point of section 11gh), h is the terminal nibbling out section 11gh.
For more preferably explanation, preferred embodiments below takes: θ0=3 pi/2s, θ2=pi/2, θ3=π
/ 2, θ4=3 π/4.Substitute into equation (1)-(7), obtain:
Z (θ)=-R sin{2 π/N-arcsin [z (θ+2 π)/R] }, θ=[-2 π ,-5 π
/4]…(1’)
Z (θ)=-H/2, θ=[-5 π/4 ,-3 π/4] ... (2 ')
Z (θ)=-H/2+ (H/4) { (3 pi/2+2 θ)/π-sin (3 pi/2+2 θ)/π }, θ
=[-3 π/4 ,-π/4] ... (3 ')
Z (θ)=H θ/π, when θ=[-π/4, π/4] ... (4 ')
Z (θ)=H/2-(H/4) { (3 pi/2-2 θ)/π-sin (3 pi/2-2 θ)/π }, works as θ
=[π/4, π/4,3] ... (5 ')
Z (θ)=H/2, θ=[3 π/4, π/4,5] ... (6 ')
Z (θ)=R sin{2 π/N+arcsin [z (θ+2 π)/R] }, as θ=[5 π/4,2 π] ...
(7’)
According to equation (1 ')-(7 ') and (8), obtain conduit centrage 111 at Z axis
The curve of projection, the most together with reference to Fig. 7.
Operationally, roller 21 enters conduit 11 through engaging-in section of 11ab and arrives first section of resting
11bc；Roller 21 and conduit 11 are when the first section of resting 11bc cooperating, although worm screw
Cam encloses and turns about the Z axis, but roller dish 2 is the most static does not turns round, therefore, roller dish 2 point
Spend, brake, position and typically carry out in first section of resting；Then, roller 21 just sequentially enters
String accelerated motion section 11cd, movement at the uniform velocity section 11de and sinusoidal retarded motion section 11ef, at Z
Direction of principal axis takes turns doing sinusoidal acceleration accelerated motion, movement at the uniform velocity, sinusoidal acceleration retarded motion；
Enter the second section of resting 11fg, at this moment, relative first section of resting 11bc, roller dish 2 afterwards
Have turned through minute of angle: a 2 π/N；Last roller 21 leaves conduit 11 from nibbling out a section 11gh.
As shown in Figure 7, when being in the first section of resting 11bc and the second section of resting 11fg, conduit center
The displacement of the Z-direction of line 111 does not changes with the change of anglec of rotation θ with polar radius r,
So, roller 21 and conduit 11 are when the section of resting is intermeshed, although worm-cam 1 is around Z
Axle rotates, but roller 21 transfixion, roller dish 2 is the most static not to turn round.Therefore, whole machine
Structure is braked in the section of resting, indexes and positions, it is possible to produces good segmentation and drives into effect.
As shown in Figure 8, acceleration A is finite value, and not sudden change, and therefore, mechanism is whole
In individual motor process, both without rigid shock also without soft impulse, stable movement, speed is high, point
Accurately (the A curve in Fig. 8 is the accelerating curve that roller 21 moves to degree, and V curve is roller 21
The rate curve of motion).
It addition, equation (1 ') and (7 ') have taken into full account that roller 21 is when engaging-in nibbling out and groove
The position relationship in road 11, is effectively prevented from producing and interferes.
Further, the radial section semicircular in shape of this conduit 11, so at machining worm cam
Conduit 11 time, need to be with the four-shaft processor of arranging in pairs or groups of the cutter with semicircle cutting edge only
Can.Therefore, worm-cam 1 is easy to manufacture quickly, is suitable to produce in a large number and can reduce produce into
This.
Further, the side of this roller 21 is arc surface, and this arc surface is used for and this conduit 11
Medial wall contacts.
It will be apparent to those skilled in the art that can technical scheme as described above and structure
Think, make other various corresponding changes and deformation, and all these changes and deformation
Within all should belonging to the protection domain of the claims in the present invention.
Claims (3)
1. a worm-cam indexing mechanism, including worm-cam and roller dish, worm-cam bag
Including worm screw and the cam being installed on worm screw, the outside of this cam offers conduit, this conduit in
Helical form；This roller dish is provided with multiple roller, and the plurality of roller is circumferentially-spaced along roller dish
Distribution, this roller is for moving in conduit, it is characterised in that:
This conduit is sequentially provided with engaging-in section from one end, first section of resting, sinusoidal accelerates to the other end
Motor segment, movement at the uniform velocity section, sinusoidal retarded motion section, second section of resting and nibble out section, this is nibbled
The section of entering and the groove width nibbling out section are all higher than the width of this roller, this first section of resting, sinusoidal acceleration
The groove width of motor segment, movement at the uniform velocity section, sinusoidal retarded motion section and second section of resting is equal to this
The width of roller, and when roller is positioned at this first section of resting, sinusoidal accelerated motion section, constant speed
Motor segment, sinusoidal retarded motion section and second rest intrasegmental part time, roller be centrally located at this groove
On the centrage in road；
Set this engaging-in section, first section of resting, sinusoidal accelerated motion section, movement at the uniform velocity section, just
String retarded motion section, second section of resting and nibble out section and be respectively as follows: θ around the rotational angle of Z axis4、θ3、θ2、θ1、θ5、θ6And θ7, and θ5=θ2、θ6=θ3、θ7=θ4；Its
In this Z axis be the rotating shaft of this cam；
Meanwhile, the rotational angle θ of conduit motor segment is set0, this conduit motor segment includes sine
Accelerated motion section, movement at the uniform velocity section and sinusoidal retarded motion section；Conduit sine accelerated motion section exists
The displacement of Z-direction is h1；Conduit sine retarded motion section is h in the displacement of Z-direction2；
The centre-to-centre spacing of adjacent rollers is H；The radius of roller centre circle is R；Roller number is N；Snail
Bar cam is D with the centre-to-centre spacing of roller dish；
With the central point of worm-cam as initial point, (r, θ, z), θ is to set up cylindrical coordinate system O
The conduit centrage anglec of rotation about the z axis；
This conduit centrage of engaging-in section meets below equation in the projection of Z-direction:
Z (θ)=-R sin{2 π/N-arcsin [z (θ+2 π)/R] }, θ=[-(θ0/2+θ3+θ4),-(θ0
/2+θ3)]…(1)
The conduit centrage of this first section of resting meets below equation in the projection of Z-direction:
Z (θ)=-H/2, θ=[-(θ0/2+θ3),-θ0/2]…(2)
The conduit centrage of this sine accelerated motion section meets in the projection of Z-direction with lower section
Journey:
Z (θ)=-H/2+h1·{(θ+θ0/2)/θ2-sin[π(θ+θ0/2)/θ2]/π }, θ=[-θ0/2,-θ0
/2+θ2]…(3)
The conduit centrage of this constant speed motor segment meets below equation in the projection of Z-direction:
Z (θ)=-H/2+h1+(H-h1-h2)(θ+θ0/2-θ2)/(θ0-2θ2), θ=[-θ0/2+θ2,θ0/2-
θ2]…(4)
The conduit centrage of this sine retarded motion section meets in the projection of Z-direction with lower section
Journey:
Z (θ)=H/2-h2·{(θ0/2-θ)/θ2-sin[π(θ0/2-θ)/θ2]/π }, θ=[θ0/2-θ2,
θ0/2]…(5)
The conduit centrage of this second section of resting meets below equation in the projection of Z-direction:
Z (θ)=H/2, θ=[θ0/2,θ0/2+θ3]…(6)
This is nibbled out the conduit centrage of section and meets below equation in the projection of Z-direction:
Z (θ)=R sin{2 π/N+arcsin [z (θ+2 π)/R] }, θ=[θ0/2+θ3,θ0/2+θ3+θ4]
…(7)
This conduit centrage meets below equation in the projection of the radial section of this cam:
R (θ)=D-R cos{arcsin [z (θ)/R] } ... (8)
Wherein, r is that conduit centrage point in the projection of this cam radial section is to Z axis
Distance；
And, θ1、θ2、θ3、θ4For positive number；θ0=θ1+2θ2；θ0+θ3=2 π；
H=2 R sin (π/N)；
h1=h2=2 θ2·H/(θ0-θ2)。
2. worm-cam indexing mechanism as claimed in claim 1, it is characterised in that this conduit
Radial section semicircular in shape.
3. worm-cam indexing mechanism as claimed in claim 1, it is characterised in that this roller
Side be arc surface, this arc surface is for contacting with this conduit medial wall.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979540.3A CN106239258B (en) | 2015-12-21 | 2015-12-21 | A kind of worm-cam indexing mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979540.3A CN106239258B (en) | 2015-12-21 | 2015-12-21 | A kind of worm-cam indexing mechanism |
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| CN106239258A true CN106239258A (en) | 2016-12-21 |
| CN106239258B CN106239258B (en) | 2018-08-03 |
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ID=57626821
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| CN201510979540.3A Active CN106239258B (en) | 2015-12-21 | 2015-12-21 | A kind of worm-cam indexing mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108747582A (en) * | 2018-08-02 | 2018-11-06 | 中国有色(沈阳)泵业有限公司 | A kind of accurate easy continuous division device |
| TWI653120B (en) | 2017-11-28 | 2019-03-11 | 陳國明 | Indexing drive device of turntable |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3572175A (en) * | 1969-03-03 | 1971-03-23 | Gleason Works | Indexing mechanism |
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| CN102712068A (en) * | 2009-10-16 | 2012-10-03 | 韦斯有限公司 | Rotary indexing table |
| CN203936711U (en) * | 2014-05-14 | 2014-11-12 | 简雪赺 | Gear hobbing cam numerical control scale-division dish |
| CN104148953A (en) * | 2014-07-14 | 2014-11-19 | 武汉市黄陂新隆建筑机械有限公司 | Ultrahigh-precision positioning rotary worktable with zero-clearance cam and worm transmission effect |
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| GB1367066A (en) * | 1971-08-17 | 1974-09-18 | Thorn Electrical Ind Ltd | Drive mechanism |
| JPH0639038B2 (en) * | 1988-01-14 | 1994-05-25 | 大塚カム株式会社 | Indexing device |
| CN2092633U (en) * | 1991-02-24 | 1992-01-08 | 常州电池厂 | Worm cam drive |
| CN2127755Y (en) * | 1991-08-08 | 1993-03-03 | 山东省诸城锻压机床厂 | Worm-cam intermittent dividing mechanism |
| US5176240A (en) * | 1992-03-05 | 1993-01-05 | Overton Corporation | Indexing machine with roller cam drive |
| CN2301578Y (en) * | 1997-07-16 | 1998-12-23 | 诸城市福利综合加工厂 | Power transmission mechanism |
| CN2388416Y (en) * | 1999-08-17 | 2000-07-19 | 南京造币厂 | High-speed dividing worm cam box |
| CN200942471Y (en) * | 2006-07-18 | 2007-09-05 | 潭子精密机械股份有限公司 | Entering force shaft and outputting turret improved structure for intermittent separator |
| CN101245840A (en) * | 2008-03-21 | 2008-08-20 | 天津大学 | Coaxial cam link lever high-speed dividing mechanism |
| CN102712068A (en) * | 2009-10-16 | 2012-10-03 | 韦斯有限公司 | Rotary indexing table |
| CN203936711U (en) * | 2014-05-14 | 2014-11-12 | 简雪赺 | Gear hobbing cam numerical control scale-division dish |
| CN104148953A (en) * | 2014-07-14 | 2014-11-19 | 武汉市黄陂新隆建筑机械有限公司 | Ultrahigh-precision positioning rotary worktable with zero-clearance cam and worm transmission effect |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI653120B (en) | 2017-11-28 | 2019-03-11 | 陳國明 | Indexing drive device of turntable |
| CN108747582A (en) * | 2018-08-02 | 2018-11-06 | 中国有色(沈阳)泵业有限公司 | A kind of accurate easy continuous division device |
| CN108747582B (en) * | 2018-08-02 | 2024-04-05 | 中国有色(沈阳)泵业有限公司 | Accurate simple continuous indexing device |
Also Published As
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|---|---|
| CN106239258B (en) | 2018-08-03 |
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