CN105485255B - Double pitch worm retarder with Niemann worm wheel tooth - Google Patents
Double pitch worm retarder with Niemann worm wheel tooth Download PDFInfo
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- CN105485255B CN105485255B CN201510520663.0A CN201510520663A CN105485255B CN 105485255 B CN105485255 B CN 105485255B CN 201510520663 A CN201510520663 A CN 201510520663A CN 105485255 B CN105485255 B CN 105485255B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
- F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
- F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/08—Profiling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/08—Profiling
- F16H55/0846—Intersecting-shaft arrangement of the toothed members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Gear Transmission (AREA)
- Gears, Cams (AREA)
Abstract
The present invention provides the double pitch worm retarders with Niemann worm wheel tooth, Niemann worm wheel tooth, which has, can reduce gear teeth backlash, obtains top load transmission capacity by increasing tooth bearing, enhances gear-tooth strength and quickly form the improved structure of oil film, to be suitble to do top load, efficient retarder.This should be attributed to the fact that bidentate has bidentate away from type Niemann worm tooth shape away from type Niemann worm shaft, wherein, the gear teeth of gear unit have multiple ridges and multiple slots, center line from the gear teeth of gear unit is different from the thickness of the center line of the gear teeth from gear unit to second flank of tooth to first flank of tooth, first flank of tooth and second flank of tooth of the gear teeth of odd indexed have equal radius of curvature and pressure angle, and first flank of tooth of the even number serial number gear teeth and second flank of tooth has equal radius of curvature and pressure angle.
Description
Invention field
The present invention relates to the double pitch worm retarders with Niemann worm wheel tooth.Also, more specifically, the present invention relates to
And double pitch worm retarder, the Niemann scroll bar gear teeth therein have can reduce gear teeth backlash, by increase the gear teeth contact
Face obtains top load transmission capacity, enhancing gear-tooth strength and the improvement structure that life of product is improved by quickly forming heavy oil film,
Thus it is suitble to do high load capacity and efficient Large Reducer, because bidentate has bidentate away from type Niemann snail away from type Niemann worm shaft
Bar tooth form, in bidentate away from type Niemann worm tooth shape, from the center line of the gear teeth to first flank of tooth with the center line from the gear teeth to the
Two flank of tooth it is of different size, first flank of tooth of the gear teeth of odd indexed has equal radius of curvature and pressure with second flank of tooth
Angle, and first flank of tooth of the gear teeth of even-numbered has equal radius of curvature and pressure angle with second flank of tooth.
Background technique
Generally, the gap between the gear teeth is processed for smoothness rotation, because if two gear teeth are with identical
Size, they can be stuck and cannot rotate glibly.Correspondingly, the gear teeth are classified as input the gear teeth and export the gear teeth, and defeated
The fine movement that the gear teeth are generated by gap out is referred to as " backlash ", and appears in all gear assemblies.
Recently, new high-tech industry includes the machine and part that semiconductor field needs to have high-precision and efficiency.Due to
Extremely complex and accurate operation, gear assembly have the gear teeth for mutually fine rotating engagement, and gear assembly is used to precision
Machine and part, and these gear assemblies inevitably endure backlash.However, normal backlash can with abnormal backlash,
Gap caused by abnormal backlash is worn by wheel between cog increases, and wears and caused by the lasting use of gear assembly.
Therefore, in order to solve abnormal clearance issues, that is, the gap for the gear teeth being engaged with each other in gear assembly is widened
Problem, since the abnormal backlash that abrasion generates is controlled continuously by bidentate away from the gear teeth for providing different lead, to reduce
Gap keeps normal backlash however, the gear teeth in precision machinery and component are only used for very accurate and exquisite part, so
It is quite to be restricted, and bidentate is away from there are no transported away from the worm component for a small amount of precision machinery and component using bidentate
Retarder is used as ordinary gear component, retarder is for high speed rotation to be converted into low speed rotation by motor.
Further, worm reducer, worm screw group are made of intermeshing worm shaft and worm gear, compared to common retarder
Ordinary gear component, worm screw group is from initial manufacture to completing to need careful calculating and exquisite machining, so being more difficult
With need high precision and the bidentate of exquisite technology away from.Therefore, when with bidentate away from when, in worm reducer operational process not
Need accurate adjustment backlash.
It is, bidentate is commonly used in lathe, semiconductor tester and process equipment away from worm gear type, it is simply used for
Limited part in the precision machinery of the states such as Japan, Germany, Switzerland manufacture.And the part for some lathes of South Korea, but
Know, no manufacturer has developed, sells or be commercialized the specific products that bidentate is used for retarder away from worm screw.
It to bidentate is that " deceleration of control backlash as accurate as possible is double away from the relevant prior art of worm reducer as one
Lead worm screw ", the Korean patent No. of applicant (2010,10,04) are 10-0986802 comprising: bidentate away from worm shaft,
By keeping size of the central tooth of worm thread part away from, small lead and large pitch different, make the ridge thickness edge of worm thread part
Predetermined direction increases；Bidentate is away from worm gear, and threaded portion has and central tooth of the bidentate away from worm shaft same pattern is away from, small lead
And large pitch, and engaged with bidentate away from worm shaft；Accurate adjustment shell is installed on one of bidentate away from worm shaft in rotary manner
Side, so that bidentate is rotated and moved linearly on the motor drive shaft of motor away from worm shaft；Motor is installed on bidentate away from worm shaft
The other side, and be spaced apart with bidentate away from worm shaft, so that bidentate can move linearly away from worm shaft along motor drive shaft；And for accommodating
Cabinet of the bidentate away from worm shaft and worm gear.Therefore, it by executing rotation adjustment in accurate adjustment shell, critically and constantly adjusts
Abnormal backlash of the bidentate away from worm shaft and worm gear is possible, wherein rotation of abnormal backlash when using bidentate away from worm shaft
It is generated in linear motion, can cause to wear and increases gap.
As another to bidentate away from the relevant prior art of worm reducer, " tooth is controlled by thin plate precision as far as possible
The deceleration double pitch worm of gap ", Korean patent No. are 10-0986802 (2010,10,04) comprising: bidentate away from worm shaft,
Its ridge thickness increases along predetermined direction, by make central tooth away from size be equal to it is facing with each other in the worm thread portion with ridge and slot
Ridge center between distance, the size of small lead be equal to left tooth while and a ridge baseline intersection point and left tooth while and next ridge
Baseline the distance of intersection point and the size of large pitch be equal to a ridge baseline right tooth side and next ridge baseline
Distance between the intersection point of the baseline of right tooth side and next ridge；Bidentate is away from worm gear, and threaded portion has and bidentate is away from worm shaft
The central tooth of same pattern is engaged with bidentate away from worm shaft away from, small lead and large pitch；Motor is pacified in a coupled manner
The side of axis loaded on bidentate away from worm screw, and be spaced apart with bidentate away from worm shaft, so that bidentate can be moved away from worm shaft along motor drive shaft
It is dynamic；Cabinet, for accommodating bidentate away from worm shaft and worm gear.Thin plate is pacified in a manner of with shell by taper needle bearing
The other side of axis loaded on bidentate away from worm screw；And multiple thin plates have different thickness, overlap each other, and are configured in case
Between two faces of the shell of body and thin plate.
However, in such devices, the tooth form of worm gear be it is trapezoidal, trapezoidal is the tooth form of common worm gear, and worm gear with
Line contact-type engagement, so big load cannot be transmitted.Further, the pressure angle of contact surface is right angle, so lubricant is extruded
And oil film is removed, and therefore, and contact portion is easy to damage.
Further, when the gear teeth are intermeshed, it is difficult to the backlash between each worm shaft addendum flank is controlled, in this way when backlash is too small
When, lubricate insufficient, gear tooth friction increase.Further, when backlash is excessive, gear teeth meshing is poor and gear is easy breakage.
It is aforementioned to be merely intended to help to understand background of the invention, and be not intended to the expression present invention and fall into those skilled in the art
Within the scope of the known the relevant technologies of member.
Invention is summarized
Therefore, the present invention is the mesh made after considering the above problem occurred in the related technology, and of the invention
Be propose double pitch worm retarder, have improve structure Niemann worm wheel tooth, can be easy to suitably adjust
Backlash, transmitting big load easier than existing general worm gear are easy to reinforce gear-tooth strength, are easy quickly to form oil film, and lead to
It crosses production bidentate to accurately control size away from the tooth form of worm shaft and worm gear, in the tooth form, ridge thickness is along pre-
Determine direction increase, in Niemann wheel flute profile, the flank of tooth is different from center line to side with the thickness from center line to the other side,
And the gear teeth thickness between two flank of tooth is sequentially increased by one towards another face.
In order to achieve the above object, according to an aspect of the invention, there is provided double leads with the Niemann turbine gear teeth
Worm reducer, comprising: bidentate is away from Niemann worm shaft, from gear teeth center line to first flank of tooth and from gear teeth center line to second
The flank of tooth it is of different size, first flank of tooth of the gear teeth of odd indexed has equal radius of curvature and pressure angle with second flank of tooth,
The equal radius of curvature and pressure angle that first flank of tooth of the gear teeth of even number serial number has, and the second of the gear teeth of odd indexed
Second flank of tooth of the flank of tooth and the gear teeth of even number serial number has equal radius curve and pressure angle；And bidentate is away from worm gear, with
The gear teeth of the bidentate away from Niemann worm shaft rotate engagement, wherein in bidentate away from Niemann worm shaft, the radius of curvature of second flank of tooth and
Pressure angle is bigger than the pressure angle of the radius of curvature sum of first flank of tooth, and first flank of tooth and second flank of tooth of the gear teeth are circular, and
And it is bigger than from center line to the thickness of first flank of tooth from center line to the thickness of second flank of tooth.
In the gear teeth, from gear teeth center line, the pressure angle of second flank of tooth may be bigger than the pressure angle of first flank of tooth, Yi Jiqi
Pressure angle, the odd indexed gear teeth of the pressure angle of first flank of tooth of the gear teeth of number sequence number, first flank of tooth of the gear teeth of even number serial number
Second flank of tooth pressure angle and the pressure angles of second flank of tooth of the even number serial number gear teeth can be equal respectively.
The pressure angle of first flank of tooth and second flank of tooth may be in the range of 21 to 23 degree.
According to each axial angle modulus of the gear teeth, the radius of curvature of each tooth form can satisfy the range listed in following table.
| Modulus (Ma) | The range (R) of radius of curvature (mm) |
| Ma1~Ma2 | R8~R11 |
| Ma2~Ma3 | R11~R15 |
| Ma3~Ma4 | R15~R19 |
| Ma4~Ma5 | R19~R25 |
| Ma5~Ma6 | R25~R29 |
| Ma6~Ma7 | R29~R35 |
| Ma7~Ma8 | R35~R39 |
| Ma8~Ma9 | R39~R45 |
| Ma9~Ma10 | R45~R49 |
| Ma10~Ma11 | R49~R55 |
| Ma11~Ma12 | R55~R59 |
| Ma12~Ma13 | R59~R65 |
| Ma13~Ma14 | R65~R69 |
| Ma14~Ma15 | R69~R75 |
| Ma15~Ma16 | R75~R80 |
According to each axial angle modulus of the gear teeth, the bidentate of each tooth form away from variable range can satisfy and listed in following table
Range.
| Modulus (Ma) | Bidentate away from variable range (mm) |
| Ma1~Ma2 | 0.01~0.25 |
| Ma2~Ma3 | 0.25~0.35 |
| Ma3~Ma4 | 0.35~0.4 |
| Ma4~Ma5 | 0.4~0.5 |
| Ma5~Ma6 | 0.5~0.6 |
| Ma6~Ma7 | 0.6~0.7 |
| Ma7~Ma8 | 0.7~0.8 |
| Ma8~Ma9 | 0.8~0.9 |
| Ma9~Ma10 | 0.9~1.0 |
| Ma10~Ma11 | 1.0.~1.1 |
| Ma11~Ma12 | 1.1~1.2 |
| Ma12~Ma13 | 1.2~1.3 |
| Ma13~Ma14 | 1.3~1.4 |
| Ma14~Ma15 | 1.4~1.5 |
| Ma15~Ma16 | 1.5~1.6 |
Bidentate can be SCM415 away from the material of Niemann worm shaft.
The height of teeth root of the gear teeth be both greater than or equal to the gear teeth height of teeth top.
Since the center line from the gear teeth is different from the thickness of the center line from the gear teeth to second flank of tooth to first flank of tooth, and
Thickness defined by two flank of tooth increases in a second direction, so the backlash for the gear teeth being engaged with each other can be easily adjusted.
Further, which includes bidentate away from Niemann worm shaft, and there are two the Niemann worm tooths of the female flank of tooth for tool
Shape；Bidentate is away from worm gear, with general tooth form, and introduces and contacts with the line of worm shaft, still, when bidentate of the invention is away from snail
When bar axis is engaged with bidentate away from turbine, the mutual face contact of the gear teeth is introduced, so the ability of transmitting load is improved, efficiency is obtained
To raising, so the retarder is suitble to do top load, efficient worm speed-down equipment.
Further, according to the present invention, the end portion width of the gear teeth is bigger than the end portion width of common tooth form or involute profile, institute
It is improved with the intensity of the gear teeth.Further, due to the design feature of face contact type Niemann worm tooth shape, interface pressure angle forms curved
Bent contact surface, so being retained in lubricant on the flank of tooth in worm thread portion without being extruded, and oil film being capable of quick shape
At.In addition, being capable of forming heavy oil film compared with the threaded portion of existing worm screw.
Further, the use due to bidentate away from worm gear, accurate size Control are possible.
Brief Description Of Drawings
When considered in conjunction with the accompanying drawings, above and other objects of the present invention, feature and other advantages can be by following
Detailed description is more clearly understood that, in which:
Fig. 1 shows the structure for being equipped with the retarding device of bidentate of the invention away from type Niemann worm shaft.And
Fig. 2 is the enlarged drawing of gear tooth portions of the invention.
Detailed description of the invention
Double pitch worm retarder with Niemann worm wheel tooth of the invention has the ability of excellent transmitting load, and
Intensity is improved, so it is suitble to the retarder for doing top load, efficient retarding device and retarding device to be used in here
Illustratively.
Referring to Fig.1 with 2, according to an embodiment of the invention, the double pitch worm retarder with Niemann worm wheel tooth includes:
Bidentate is away from Niemann worm shaft 10, from center line L1, L2, L3 and L4 of the gear teeth 110,120,130 and 140 to first flank of tooth and
Two flank of tooth it is of different size, first flank of tooth and second flank of tooth of the gear teeth of odd indexed have equal radius of curvature R and pressure
First flank of tooth at angle, the gear teeth of even number serial number has equal radius of curvature and pressure angle, the radius of curvature and pressure of second flank of tooth
Power angle is greater than the radius of curvature and pressure angle of first flank of tooth, first flank of tooth and second flank of tooth be it is circular, from center line L1, L2,
The thickness of L3 and L4 to second flank of tooth is greater than from center line L1, L2, L3 and L4 to the thickness of first flank of tooth, and by first flank of tooth
The thickness limited jointly with second flank of tooth increases in a second direction；And bidentate is away from worm gear 20, with the gear teeth 110,120,130 and
140 rotation engagements..
In detail, gear unit 100 has multiple gear teeth, and the gear teeth have multiple ridges and multiple slots, and retouch in following
In stating, it is referred to as first and the third gear teeth 110 and 130 corresponding to the gear teeth that ridge is odd-numbered line, and corresponding to ridge is even number line
The gear teeth be referred to as second and fourth round tooth 120 and 140.
The radius of curvature and pressure angle of first flank of tooth of the tooth 130 of first flank of tooth and third gear of first gear tooth 110
Equal (θ 1=θ 5, R1=R5) and first gear tooth 110 second flank of tooth and third gear teeth 130 second flank of tooth tool
There are equal radius of curvature and pressure angle (θ 2=θ 6, R2=R6).
First flank of tooth of second gear teeth 120 has equal radius of curvature and pressure with first flank of tooth of fourth round tooth 140
Second flank of tooth of second flank of tooth and fourth round tooth 140 of angle (θ 3=θ 7, R3=R7) and second gear teeth has equal curvature
Radius and pressure angle (θ 4=θ 8, R4=R8).
In gear unit 100 of the invention, the of first, second, third and fourth gear teeth 110,120,130 and 140
The pressure angle of two flank of tooth (7 < θ 8 of θ 1 < θ 2, θ 3 < θ 4, θ 5 < θ 6, θ) bigger than the pressure angle of first flank of tooth and first, the
Two, the radius of curvature of second flank of tooth of third and fourth gear teeth 110,120,130 and 140 is bigger than the radius of curvature of first flank of tooth
(R1 < R2, R3 < R4, R5 < R6, R7 < R8).
In first, second, third and fourth gear teeth 110,120,130 and 140, from center line L1, L2, L3 and L4 to
The thickness ratio of one side is thicker (t2 > t1, t4 > t3, t6 > t5, t8 > t7) to the second flank of tooth thickness.
The modified tooth pitch of gear unit 100 of the invention, the i.e. gear teeth as defined by first flank of tooth and second flank of tooth
Thickness be sequentially increased (the big small tooth pitch of tooth pitch >) from the first side to second side.
However, the centre tooth of the gear teeth 110,120,130 and 140 is away from width having the same (A=B=C).Center line L1,
L2, L3 and L4 be for measure the centre tooth of the gear teeth 110,120,130 and 140 away from vertical reference line.
That is, in gear unit 100 of the invention, the wheel of thickness < second defined by two flank of tooth of first gear teeth 110
The two of thickness < fourth round tooth 140 defined by two flank of tooth of the thickness < third gear teeth 130 defined by two flank of tooth of tooth
Center line L1, L2, L3 of thickness defined by a flank of tooth (T1 < T2 < T3 < T4) and the gear teeth 110,120,130 and 140 and
Gap between L4 is identical.
Further, in gear unit 100 of the invention, as described above, from center line L1, L2, L3 and L4 to the second tooth
The thickness in face is bigger than the thickness to first flank of tooth.That is, second flank of tooth of first flank of tooth of second gear teeth 120 than first gear teeth 110
First flank of tooth of thickness, the third gear teeth is thicker than second flank of tooth of second gear teeth 120 and first flank of tooth of fourth round tooth 140 is than
Second flank of tooth of three gear teeth 130 is thick (t1 < t2, t2 < t3, t3 < t4, t4 < t5, t5 < t6, t6 < t7, t7 < t8).
The pressure angle of first flank of tooth and second flank of tooth is in the range of 21 to 23 degree.
First flank of tooth and second flank of tooth of the gear teeth 110,120,130 and 140 are respectively opposite each other and the gear teeth 110,120,
130 and 140 flank of tooth be it is circular, when so that gear unit being engaged with worm gear, the flank of tooth of the gear teeth introduces mutual face contact.
First flank of tooth and second flank of tooth of the odd indexed gear teeth and the even number serial number gear teeth are respectively provided with equal radius of curvature
And pressure angle.
In the gear teeth 110,120,130 and 140, height of teeth root is that the distance from trench bottom to pitch circle is equal to or more than tooth top
Height, that is, the distance between top surface and pitch circle (h1 >=h2) and height of teeth root can be 1.25 times of modulus and compare height of teeth top
Greatly.
The reference number " 13 " that do not list above indicates that motor 13 rotates bidentate away from worm shaft 10.
The most stable using SCM415, SCM415 is that the special steel and this material for bidentate away from worm shaft 10 remove
There is high rigidity, also there is strong shock resistance and high tensile.
In worm gear, including bidentate is away from worm gear 20, as described above, threaded portion of the bidentate away from worm gear 20 is manufactured into bidentate
Away from Niemann worm, and PCD (pitch diameter) does not refer to nodel line, is manufactured by the nodal section that big tooth pitch and small tooth pitch intersect with each other.
Variable gear away from bidentate away from variable range and radius of curvature it is as shown in Table 1 below.
[table 1]
In table 1, modulus is classified based on axial angle, and has different R and bidentate away from variable.
The range that the R of the tooth form with each modulus is listed in table 1, when R is less than R8, radius of curvature is too small, and is difficult to
Reduced with the intensity that gear hob processes tooth and the gear teeth, so being difficult to apply to top load, efficient retarder.On the contrary,
When R is greater than R80, that processes the gear hob of the gear teeth is also sized to proportional increase, is used in combination this makes it difficult to install gear wheel hobboing cutter
Gear wheel hobboing cutter manufactures the gear teeth.
In addition, radius of curvature is determined by axial angle modulus in gear unit 100, and according to each axial angle modulus, tooth
Away from changing in the range of 0.01~1.6 millimeter.
In table 1, modulus is classified based on axial angle, and has different R and bidentate away from variable.
Bidentate is away from 0.01~1.6 millimeter of range, but when bidentate is away from than lower limit (0.01 millimeter) more hour, just not
It is that a bidentate is almost identical as ordinary gear away from gear, so being difficult to generate bidentate away from effect (accurate dimension control action)
Adjust backlash, or when bidentate is away from greatly, the thickness change of ridge is excessive, so tooth form is difficult to engage than upper limit value (1.6 millimeters).
However, due to the contact surface in tooth form be it is circular, the pressure angle of contact surface maintains 21~23 ° of identical water
On flat, but bidentate is proportional to modulus value away from variable.
It is circular since the gear teeth of the invention have valuable two flank of tooth, and is in Niemann worm, bidentate is away from worm gear
With general tooth form and lead-in contact, but when bidentate is engaged with bidentate away from worm gear away from worm shaft, which introduces face and connects
Touching, so the ability of transmitting load obtains improving and efficiency is improved；Therefore, which is suitble to require top load and efficiently
The worm reducer of rate.
Further, according to the present invention, in bidentate away from Niemann worm tooth shape, due to the center line from the gear teeth to first flank of tooth
There is different width from the center line from the gear teeth to second flank of tooth, first flank of tooth and second flank of tooth of the odd indexed gear teeth have
Equal R and pressure angle, and first flank of tooth of the even number serial number gear teeth and second flank of tooth have equal R and pressure angle, the gear teeth
Backlash is reduced.
Further, according to the present invention, the end portion width of the gear teeth is bigger than the end portion width of common tooth form or involute profile, institute
It is improved with the intensity of the gear teeth.Further, since the design feature of face contact type Niemann worm tooth shape, interface pressure angle causes to be bent
Contact surface, so lubricant is retained on gear unit 100 without being extruded, and oil film can be formed quickly.In addition, with
Gear unit 100 with existing worm shaft is compared, and heavy oil film is capable of forming, and accurate numerical control may be implemented.
Although a preferred embodiment of the present invention has been described with illustration purpose, those skilled in the art should
Understand, various modifications, increase and replacement are possible without departing from scope and spirit of the present invention disclosed in appended claims
's.
Claims (4)
1. the double pitch worm retarder with Niemann worm wheel tooth, comprising:
Bidentate is away from Niemann worm shaft (10), from gear teeth center line to first flank of tooth and from the gear teeth (110,120,130,140)
Heart line (L1, L2, L3, L4) is of different size to second flank of tooth, and first flank of tooth of the gear teeth of odd indexed has equal curvature
Radius and pressure angle, and second flank of tooth of the gear teeth of odd indexed has equal radius of curvature and pressure angle, even number serial number
The gear teeth the equal radius of curvature and pressure angle that has of first flank of tooth, and second flank of tooth and idol of the gear teeth of odd indexed
Second flank of tooth of the gear teeth of number sequence number is respectively provided with equal radius of curvature and pressure angle；
Bidentate is engaged away from worm gear (20) with the gear teeth (110,120,130,140) rotation,
Wherein, in the bidentate away from Niemann worm shaft (10), the radius of curvature and pressure angle of second flank of tooth are than described
The radius of curvature and pressure angle of one flank of tooth are big；
First flank of tooth and second flank of tooth of the gear teeth (110,120,130,140) are configured to have circle curvature, and
And it is opposite each other based on center line (L1, L2, L3, L4), so that the gear teeth flank of tooth generates face contact when engaging with worm gear (20)；
Width ratio from the center line (L1, L2, L3, L4) to described second flank of tooth is from the center line (L1, L2, L3, L4)
The width that width is big and first flank of tooth and second flank of tooth limit to first flank of tooth increases in a second direction
Greatly；
According to the different axial angle moduluses of the gear teeth (110,120,130,140), the radius of curvature of tooth form and bidentate away from
Variable range meets the range that following table is listed.
2. retarder according to claim 1, wherein first flank of tooth of the gear teeth and the pressure of second flank of tooth
Power angle is in the range of 21 to 23 degree.
3. retarder according to claim 1, wherein a kind of material of the bidentate away from Niemann worm shaft is SCM415.
4. retarder according to claim 1, wherein the height of teeth root of the gear teeth is greater than or equal to the tooth top of the gear teeth
It is high.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20140109053 | 2014-08-21 | ||
| KR10-2014-0109053 | 2014-08-21 | ||
| KR10-2014-0137009 | 2014-10-10 | ||
| KR1020140137009A KR101521791B1 (en) | 2014-08-21 | 2014-10-10 | Dual lead type cavex worm reduction apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105485255A CN105485255A (en) | 2016-04-13 |
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| CN102672283A (en) * | 2012-01-07 | 2012-09-19 | 河南科技大学 | Offset worm and wormwheel transmission designing and manufacturing method |
| CN103032520A (en) * | 2013-01-04 | 2013-04-10 | 江苏天宏自动化科技有限公司 | Dual-lead worm wheel and worm mechanism |
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| KR20120056374A (en) * | 2010-11-25 | 2012-06-04 | 오택춘 | Decelerate of dual lead worm with double shrink disk |
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| CN103032520A (en) * | 2013-01-04 | 2013-04-10 | 江苏天宏自动化科技有限公司 | Dual-lead worm wheel and worm mechanism |
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