CN106239258B - A kind of worm-cam indexing mechanism - Google Patents
A kind of worm-cam indexing mechanism Download PDFInfo
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- CN106239258B CN106239258B CN201510979540.3A CN201510979540A CN106239258B CN 106239258 B CN106239258 B CN 106239258B CN 201510979540 A CN201510979540 A CN 201510979540A CN 106239258 B CN106239258 B CN 106239258B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 20
- 238000009826 distribution Methods 0.000 claims abstract description 4
- 230000000284 resting effect Effects 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000001133 acceleration Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000035939 shock Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Escalators And Moving Walkways (AREA)
Abstract
A kind of worm-cam indexing mechanism, including worm-cam and roller disk, worm-cam include worm screw and the cam that is installed on worm screw, offer conduit on the outside of the cam, the conduit is in the shape of a spiral；The roller disk is equipped with multiple rollers, circumferentially-spaced distribution of multiple roller along roller disk, the roller for being moved in conduit, the conduit be equipped with successively from one end to the other end engaging-in section, first rest section, sinusoidal accelerate section, movement at the uniform velocity section, sinusoidal retarded motion section, second rest and section and nibble out section.The present invention can with the mass motion performance of hoisting mechanism, and avoid roller it is engaging-in nibble out conduit when generate interference.
Description
Technical field
The present invention relates to a kind of indexing means more particularly to a kind of worm-cam indexing mechanisms.
Background technology
Common worm-cam indexing mechanism, composition include mainly：Worm-cam, roller disk, roller, roller are equidistant
On the radial circumference of roller disk.Worm-cam be equipped with conduit, conduit can then be divided into rest conduit and movement conduit.Work
When making, there are two rollers to be intermeshed always with conduit.When worm-cam is driven to rotate in situ, stop if roller is engaged in
It has a rest conduit, roller disk is stationary；If roller is engaged in movement conduit, roller disk generates revolution fortune in the case where the engagement of conduit pushes
It is dynamic；The intermittent movement (rotation) of roller disk just can be realized in this way.
Because intermittent movement (rotation) works well, above-mentioned worm-cam indexing mechanism is widely used, such as applied to
Tool magazine, index table in machining equipment etc..
Nevertheless, to keep roller and the good engagement relationship of conduit at work, channel shape is complicated, and processing is tired
Difficulty will produce once complete worm-cam and its conduit at present, it is necessary to expensive, processing program complexity the five-axis robot using equipment
Machine, high processing costs, it is difficult to mass production.
For manufacture it is difficult this is insufficient, also there are methods of some improvement, such as by the conduit bottom surface of worm-cam
Semicircular in shape curved surface has the contour structures that the roller of movement matching relationship also uses semicircle spherical surface with conduit.In this way, adding
When the conduit of work worm-cam, the cutter collocation four-shaft processor with semicircle cutting edge need to be only used.Therefore, it uses
Improve structure, the manufacture of worm-cam 1 is easy that quickly, suitable for mass production and production cost can be reduced.However, thus no pair
The curve movement of worm-cam is improved, and movenent performance is to be improved.Meanwhile roller is produced engaging-in with easy when nibbling out conduit
Raw interference.
Invention content
In view of the deficiencies of the prior art, the purpose of the present invention is intended to provide a kind of worm-cam indexing mechanism, elevator
The mass motion performance of structure, and avoid roller it is engaging-in nibble out conduit when generate interference.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of worm-cam indexing mechanism, including worm-cam and roller disk, worm-cam include worm screw and are installed in snail
Cam on bar offers conduit on the outside of the cam, and the conduit is in the shape of a spiral；The roller disk is equipped with multiple rollers, this is more
A roller is along the circumferentially-spaced distribution of roller disk, and the roller in conduit for moving：
The conduit be equipped with successively from one end to the other end engaging-in section, first rest section, sinusoidal accelerate section, movement at the uniform velocity
Section, sinusoidal retarded motion section, second, which are rested, section and nibbles out section, this engaging-in section and nibbles out the groove width of section and is all higher than the width of the roller
Degree, this first rest section, it is sinusoidal accelerate section, movement at the uniform velocity section, sinusoidal retarded motion section and second rest section groove width it is equal
It first rests section, sinusoidal section, movement at the uniform velocity section, the sine of accelerating equal to the width of the roller, and when roller is located at this and subtracts
Fast motor segment and second rest intersegmental part when, roller center be located on the center line of the conduit；
Set this engaging-in section, first rest section, sinusoidal accelerate section, movement at the uniform velocity section, sinusoidal retarded motion section, second
It rests and section and nibbles out section and be respectively around the rotational angle of Z axis：θ4、θ3、θ2、θ1、θ5、θ6And θ7, and θ5=θ2、θ6=θ3、θ7
=θ4；Wherein the Z axis is the shaft of the cam；
Meanwhile setting the rotational angle θ of conduit motor segment0, which includes sinusoidal accelerated motion section, constant speed fortune
Dynamic section and sinusoidal retarded motion section；It is h that conduit sine, which accelerates section in the displacement of Z-direction,1；Conduit sine retarded motion section
It 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；Worm screw
The centre-to-centre spacing of cam and roller disk is D；
Using the central point of worm-cam as origin, establish cylindrical coordinate system O (r, θ, z), θ be conduit center line about the z axis
Rotation angle；
Engaging-in section of the conduit center line meets following equation in the projection of Z-direction：
Z (θ)=- Rsin { 2 π/N-arcsin [z (+2 π of θ)/R] }, θ=[- (θ0/2+θ3+θ4),-(θ0/2+θ3)]…
(1)
The first conduit center line for resting section meets following equation in the projection of Z-direction：
Z (θ)=- H/2, θ=[- (θ0/2+θ3),-θ0/2]…(2)
The conduit center line that the sine accelerates section meets following equation in the projection of Z-direction：
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 center line of the constant speed motor segment meets following 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 center line of the sine retarded motion section meets following equation in the projection of Z-direction：
Z (θ)=H/2-h2·{(θ0/2-θ)/θ2-sin[π(θ0/2-θ)/θ2]/π }, θ=[θ0/2-θ2,θ0/2]…(5)
The second conduit center line for resting section meets following equation in the projection of Z-direction：
Z (θ)=H/2, θ=[θ0/2,θ0/2+θ3]…(6)
The conduit center line for nibbling out section meets following equation in the projection of Z-direction：
Z (θ)=Rsin { 2 π/N+arcsin [z (+2 π of θ)/R] }, θ=[θ0/2+θ3,θ0/2+θ3+θ4]…(7)
The conduit center line meets following equation in the projection of the radial section of the cam：
R (θ)=D-Rcos { arcsin [z (θ)/R] } ... (8)
Wherein, r is distance of point of the conduit center line in the projection of the cam radial section to Z axis；
Moreover, θ1、θ2、θ3、θ4For positive number；θ0=θ1+2θ2；θ0+θ3=2 π；
H=2Rsin (π/N)；
h1=h2=2 θ2·H/(θ0-θ2)。
Further, the radial section semicircular in shape of the conduit.
Further, the side of the roller is arc surface, and the arc surface with the conduit madial wall for contacting.
The beneficial effects of the present invention are：
Compared with the prior art, worm-cam indexing mechanism of the invention, worm-cam is using movement at the uniform velocity and sine
The amendment movement at the uniform velocity curve that acceleration movement is combined, mechanism is in entire motion process, both without rigid shock or without flexibility
Impact, stable movement, speed is high, and indexing is accurate, the mass motion performance of hoisting mechanism；Moreover, the design of conduit fully considers
Roller avoids generating interference in engaging-in nibble out and the position relationship of conduit.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 to Fig. 4 is structural schematic diagram of the worm-cam in three different working conditions；
Fig. 5 is the structural schematic diagram (showing conduit center line) of worm-cam；
Fig. 6 is perspective view of the conduit center line 111 in cam radial section；
Fig. 7 is the schematic diagram of the displacement and polar radius r of the Z-direction of conduit center line 111；
Fig. 8 is the movement velocity and accelerating curve schematic diagram of roller；
Wherein：1, worm-cam；101, worm screw；102, cam；11, conduit；111, conduit center line；11ab, engaging-in section；
11bc, first rest section；11cd, sinusoidal accelerated motion section；11de, movement at the uniform velocity section；11ef, sinusoidal retarded motion section；11fg、
Second rests section；11gh, section is nibbled out；2, roller disk；21, roller；L, the width of roller；H, the centre-to-centre spacing of two neighboring roller；
R, the radius of roller centre circle；D, the centre-to-centre spacing of worm-cam and roller disk.
Specific implementation mode
In the following, in conjunction with attached drawing and specific implementation mode, the present invention is described further：
As shown in Figures 1 to 6, worm-cam indexing mechanism of the invention, including worm-cam 1 and roller disk 2, worm screw is convex
Wheel 1 includes worm screw 101 and the cam 102 being installed on worm screw 101, and the outside of the cam 102 offers conduit 11, the conduit 11
In the shape of a spiral；The roller disk 2 is equipped with multiple rollers 21, and multiple roller 21 is along the circumferentially-spaced distribution of roller disk 2, the roller
21 for the movement in conduit 11；
The conduit 11 be equipped with successively from one end to the other end engaging-in section of 11ab, first rest a section 11bc, sinusoidal accelerate
Section 11cd, movement at the uniform velocity section 11de, sinusoidal retarded motion section 11ef, second, which are rested, section 11fg and nibbles out a section 11gh, this engaging-in section
11ab and the groove width for nibbling out section 11gh are all higher than the width of the roller 21, and therefore, the roller 21 is engaging-in and nibble out the conduit 11
When, can not be contacted with conduit 11, to make worm-cam 1 will not push the roller disk 2 move, this first rest a section 11bc,
Sine accelerate section 11cd, movement at the uniform velocity section 11de, sine retarded motion section 11ef and second rest section 11fg groove width it is equal
Equal to the width L of the roller 21, and when roller 21 be located at this first rest a section 11bc, sinusoidal accelerate section 11cd, constant speed
Motor segment 11de, sine retarded motion section 11ef and second rest section 11fg inside when, roller 21 center be located at conduit 11
Conduit center line 111 on；
Set the engaging-in section of 11ab, first rest a section 11bc, sinusoidal accelerate section 11cd, movement at the uniform velocity section 11de, just
String retarded motion section 11ef, second, which are rested, section 11fg and to nibble out section 11gh and is respectively around the rotational angle of Z axis：θ4、θ3、θ2、
θ1、θ5、θ6And θ7, and θ5=θ2、θ6=θ3、θ7=θ4；Wherein the Z axis be the cam 102 shaft (in the present embodiment, θ4、
θ3、θ2、θ1、θ5、θ6And θ7The respectively engaging-in section of 11ab, first rest a section 11bc, sinusoidal accelerate section 11cd, movement at the uniform velocity
Section 11de, sinusoidal retarded motion section 11ef, second rest section 11fg conduit center lines 111 corresponding with section 11gh is nibbled out around Z
The rotational angle of axis)；
Meanwhile setting the rotational angle θ of conduit motor segment0(in the present embodiment, θ0For in the corresponding conduit of conduit motor segment
Heart line 111 surrounds the rotational angle of Z axis), the conduit motor segment include it is sinusoidal accelerate section 11cd, movement at the uniform velocity section 11de,
Sinusoidal retarded motion section 11ef；It is h that conduit sine, which accelerates section 11cd in the displacement of Z-direction,1；Conduit sine retarded motion
Section is h in the displacement of Z-direction2；The centre-to-centre spacing of adjacent rollers 21 is H (conduit motor segment is also H in the displacement of Z-direction)；
The radius of 21 center circle of roller is R；21 numbers of roller are N；The centre-to-centre spacing of worm-cam 1 and roller disk 2 is D；
Using the central point of worm-cam 1 as origin, axial is Z axis, which is located on Z axis, which is the cam 102
Shaft, establish cylindrical coordinate system O (r, θ, z), θ is the rotation angle of conduit center line 111 about the z axis；
Engaging-in section of the conduit center line meets following equation in the projection of Z-direction：
Z (θ)=- Rsin { 2 π/N-arcsin [z (+2 π of θ)/R] }, θ=[- (θ0/2+θ3+θ4),-(θ0/2+θ3)]…
(1)
The first conduit center line for resting section meets following equation in the projection of Z-direction：
Z (θ)=- H/2, θ=[- (θ0/2+θ3),-θ0/2]…(2)
The conduit center line that the sine accelerates section meets following equation in the projection of Z-direction：
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 center line of the constant speed motor segment meets following 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 center line of the sine retarded motion section meets following equation in the projection of Z-direction：
Z (θ)=H/2-h2·{(θ0/2-θ)/θ2-sin[π(θ0/2-θ)/θ2]/π }, θ=[θ0/2-θ2,θ0/2]…(5)
The second conduit center line for resting section meets following equation in the projection of Z-direction：
Z (θ)=H/2, θ=[θ0/2,θ0/2+θ3]…(6)
The conduit center line for nibbling out section meets following equation in the projection of Z-direction：
Z (θ)=Rsin { 2 π/N+arcsin [z (+2 π of θ)/R] }, θ=[θ0/2+θ3,θ0/2+θ3+θ4]…(7)
The conduit center line meets following equation in the projection of the radial section of the cam：
R (θ)=D-Rcos { arcsin [z (θ)/R] } ... (8)
Wherein, r is that r (is hereafter known as by the distance of conduit the center line point in the projection of the cam radial section to Z axis
Polar radius)；
Moreover, θ1、θ2、θ3、θ4For positive number；θ0=θ1+2θ2；θ0+θ3=2 π；
H=2Rsin (π/N)；
h1=h2=2 θ2·H/(θ0-θ2)。
The worm-cam indexing mechanism of the present invention, worm-cam are combined using movement at the uniform velocity and sinusoidal acceleration movement
Amendment move at the uniform velocity curve, mechanism is in entire motion process, both without rigid shock or without soft impulse, stable movement, speed
Degree is high, and indexing is accurate；Moreover, the design of conduit has fully considered that roller in engaging-in nibble out and the position relationship of conduit, avoids
Generate interference.
A is the starting point of engaging-in section of 11ab in the figure, terminal that b is engaging-in section of 11ab (while being first to rest section 11bc's
Starting point), c is the first terminal (while be the sinusoidal starting point for accelerating section 11cd) for resting section 11bc, and d is sinusoidal accelerated motion
The terminal (while being the starting point of movement at the uniform velocity section 11de) of section 11cd, terminal that e be movement at the uniform velocity section 11de (while subtracting for sine
The starting point of fast motor segment 11ef, terminal that f the is sinusoidal retarded motion section 11ef starting point of section 11fg (while resting for second), g
Rest the terminal (while to nibble out the starting point of section 11gh) of section 11fg for second, h is the terminal for nibbling out section 11gh.
More preferably to illustrate, preferred embodiments below takes：θ0=3 pi/2s, θ2=pi/2, θ3=pi/2, θ4=3 π/4.Substitute into equation
(1)-(7), obtain：
Z (θ)=- Rsin { 2 π/N-arcsin [z (+2 π of θ)/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) { (+2 θ of 3 pi/2)/π-sin (+2 θ of 3 pi/2)/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) { (- 2 θ of 3 pi/2)/π-sin (- 2 θ of 3 pi/2)/π }, when θ=[π/4 π/4,3] ... (5 ')
Z (θ)=H/2, θ=[π/4 3 π/4,5] ... (6 ')
Z (θ)=Rsin { 2 π/N+arcsin [z (+2 π of θ)/R] }, when θ=[π of 5 π/4,2] ... (7 ')
According to equation (1 ')-(7 ') and (8), the curve that conduit center line 111 is projected in Z axis is obtained, please reference chart together
7。
At work, roller 21, which through engaging-in section of 11ab enters conduit 11 and reaches first, rests a section 11bc；Roller 21 and conduit
11 first rest section 11bc cooperatings when, turned about the Z axis although worm-cam encloses, roller disk 2 is then static not to turn round, because
This, the indexing of roller disk 2, braking, positioning generally rest section first and carry out；Then, roller 21 sequentially enters sinusoidal acceleration fortune
Dynamic section 11cd, movement at the uniform velocity section 11de and sinusoidal retarded motion section 11ef take turns doing sinusoidal acceleration in Z-direction and accelerate fortune
Dynamic, movement at the uniform velocity, sinusoidal acceleration retarded motion；A section 11fg is rested into second, at this moment, opposite first rests section later
11bc, roller disk 2 have turned through a minute of angle：2π/N；Last roller 21 leaves conduit 11 from a section 11gh is nibbled out.
As shown in Figure 7, in first rest section 11bc and second rest section 11fg when, the Z-direction of conduit center line 111
Displacement do not change with the variation of rotation angle θ with polar radius r, so, roller 21 and conduit 11 are nibbled mutually resting section
It when conjunction, is turned about the Z axis although worm-cam 1 encloses, roller 21 is stationary, and roller disk 2 is also static not to turn round.Therefore, entirely
Mechanism is braked, indexed and is positioned resting section, can be generated good segmentation and be driven into effect.
As shown in Figure 8, acceleration A is finite value, and is not mutated, therefore, mechanism in entire motion process, both without
Rigid shock is also without soft impulse, and stable movement, speed is high, and indexing is accurate, and (the A curves in Fig. 8 are the acceleration that roller 21 moves
It writes music line, V curves are the rate curve that roller 21 moves).
In addition, equation (1 ') has fully considered that roller 21, with the position relationship of conduit 11, has in engaging-in nibble out with (7 ')
It avoids to effect generating interference.
Further, the radial section semicircular in shape of the conduit 11 only needs in this way in the conduit 11 of machining worm cam
With the cutter collocation four-shaft processor with semicircle cutting edge.Therefore, the manufacture of worm-cam 1 is easy quick, is suitable for
Mass production simultaneously can reduce production cost.
Further, the side of the roller 21 is arc surface, and the arc surface with 11 madial wall of conduit for contacting.
It will be apparent to those skilled in the art that technical solution that can be as described above and design, make various other
Corresponding change and deformation, and all these changes and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (3)
1. a kind of worm-cam indexing mechanism, including worm-cam and roller disk, worm-cam includes worm screw and is installed in worm screw
On cam, offer conduit on the outside of the cam, the conduit is in the shape of a spiral；The roller disk is equipped with multiple rollers, multiple
Roller is along the circumferentially-spaced distribution of roller disk, and the roller in conduit for moving, it is characterised in that：
The conduit be equipped with successively from one end to the other end engaging-in section, first rest section, it is sinusoidal accelerate section, movement at the uniform velocity section,
Sinusoidal retarded motion section, second, which are rested, section and nibbles out section, this engaging-in section and nibbles out the groove width of section and is all higher than the width of the roller, should
First rest section, it is sinusoidal accelerate section, movement at the uniform velocity section, sinusoidal retarded motion section and second rest section groove width be equal to this
The width of roller, and when roller be located at this first rest section, sinusoidal accelerate section, movement at the uniform velocity section, sinusoidal retarded motion
Section and second rest intersegmental part when, roller center be located on the center line of the conduit；
Set this engaging-in section, first rest section, sinusoidal accelerate section, movement at the uniform velocity section, sinusoidal retarded motion section, second rest
It section and nibbles out section and is respectively around the rotational angle of Z axis：θ4、θ3、θ2、θ1、θ5、θ6And θ7, and θ5=θ2、θ6=θ3、θ7=θ4；
Wherein the Z axis is the shaft of the cam；
Meanwhile setting the rotational angle θ of conduit motor segment0, which includes sinusoidal accelerated motion section, movement at the uniform velocity section
With sinusoidal retarded motion section；It is h that conduit sine, which accelerates section in the displacement of Z-direction,1；Conduit sine retarded motion section is in Z
The displacement of axis direction is h2；The centre-to-centre spacing of adjacent rollers is H；The radius of roller centre circle is R；Roller number is N；Worm-cam
Centre-to-centre spacing with roller disk is D；
Using the central point of worm-cam as origin, cylindrical coordinate system O (r, θ, z) is established, θ is the rotation of conduit center line about the z axis
Angle；
Engaging-in section of the conduit center line meets following equation in the projection of Z-direction：
Z (θ)=- Rsin { 2 π/N-arcsin [z (+2 π of θ)/R] }, θ=[- (θ0/2+θ3+θ4),-(θ0/2+θ3)]…(1)
The first conduit center line for resting section meets following equation in the projection of Z-direction：
Z (θ)=- H/2, θ=[- (θ0/2+θ3),-θ0/2]…(2)
The conduit center line that the sine accelerates section meets following equation in the projection of Z-direction：
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 center line of the constant speed motor segment meets following 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 center line of the sine retarded motion section meets following equation in the projection of Z-direction：
Z (θ)=H/2-h2·{(θ0/2-θ)/θ2-sin[π(θ0/2-θ)/θ2]/π }, θ=[θ0/2-θ2,θ0/2]…(5)
The second conduit center line for resting section meets following equation in the projection of Z-direction：
Z (θ)=H/2, θ=[θ0/2,θ0/2+θ3]…(6)
The conduit center line for nibbling out section meets following equation in the projection of Z-direction：
Z (θ)=Rsin { 2 π/N+arcsin [z (+2 π of θ)/R] }, θ=[θ0/2+θ3,θ0/2+θ3+θ4]…(7)
The conduit center line meets following equation in the projection of the radial section of the cam：
R (θ)=D-Rcos { arcsin [z (θ)/R] } ... (8)
Wherein, r is distance of point of the conduit center line in the projection of the cam radial section to Z axis；
Moreover, θ1、θ2、θ3、θ4For positive number；θ0=θ1+2θ2；θ0+θ3=2 π；
H=2Rsin (π/N)；
h1=h2=2 θ2·H/(θ0-θ2)。
2. worm-cam indexing mechanism as described in claim 1, which is characterized in that the radial section semicircular in shape of the conduit.
3. worm-cam indexing mechanism as described in claim 1, which is characterized in that the side of the roller is arc surface, the circle
Cambered surface with the conduit madial wall for contacting.
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| CN201510979540.3A CN106239258B (en) | 2015-12-21 | 2015-12-21 | A kind of worm-cam indexing mechanism |
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| CN201510979540.3A CN106239258B (en) | 2015-12-21 | 2015-12-21 | A kind of worm-cam indexing mechanism |
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| CN106239258B true CN106239258B (en) | 2018-08-03 |
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| 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 |
| 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 |
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| JPH0639038B2 (en) * | 1988-01-14 | 1994-05-25 | 大塚カム株式会社 | Indexing device |
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| 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 |
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|---|---|
| CN106239258A (en) | 2016-12-21 |
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Application publication date: 20161221 Assignee: Science City (Guangzhou) Finance Leasing Co.,Ltd. Assignor: GUANGZHOU HAOZHI INDUSTRIAL Co.,Ltd. Contract record no.: X2020980004919 Denomination of invention: A worm cam indexing mechanism Granted publication date: 20180803 License type: Exclusive License Record date: 20200813 |
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