CN210770042U - Rotary part driven by rolling body - Google Patents
Rotary part driven by rolling body Download PDFInfo
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- CN210770042U CN210770042U CN201920910121.8U CN201920910121U CN210770042U CN 210770042 U CN210770042 U CN 210770042U CN 201920910121 U CN201920910121 U CN 201920910121U CN 210770042 U CN210770042 U CN 210770042U
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Abstract
The utility model relates to a by rolling element driven gyration part, at least including the worm wheel with rolling element on the worm wheel, the worm wheel can be connected with the body of rod meshing, wherein: under the condition that the rolling body rotates around the center of the worm wheel, the rolling body transmits mechanical force to the rod body in a manner of being in partial line contact with the rod body, and rotation without return error is formed. The utility model discloses a set up first rolling element and second rolling element and make first rolling element and second rolling element on the worm wheel can effectively get rid of the sideshake that exists in the transmission, normal transmission and good lubrication have been guaranteed, and through the mode with first rolling element and second rolling element dislocation, return stroke error in the transmission has been eliminated, noise and heat in the work of having avoided, and aggravate the wearing and tearing problem of worm wheel and/or worm, the stability of worm wheel and worm has been guaranteed and life has been promoted.
Description
Technical Field
The utility model relates to the field of mechanical equipment, especially, relate to a revolving part by rolling element driven.
Background
The worm transmission is used for occasions with two crossed shafts, large transmission ratio, small transmission power or intermittent work, has the advantages of stable transmission, low noise, small impact load, self-locking property and the like, and is widely applied to industries such as national defense, metallurgy, shipbuilding, construction, chemical engineering and the like as an important transmission mode in mechanical transmission. However, the common worm drive generally has the following significant disadvantages:
in order to form a lubricating oil film between meshed tooth profiles and avoid the clamping caused by the friction and the thermal expansion of the gear teeth, a gap is required to be reserved between two non-working tooth profiles of conjugate teeth of the common worm drive, and the gap is called a tooth side gap, which is called a backlash for short. This backlash is normally used to store lubricating oil and to compensate for thermal variations, elastic deformations, manufacturing and mounting errors, etc. which occur in the drive in order to ensure proper meshing of the worm gear and the drive. However, in a transmission requiring forward and reverse rotation, the presence of backlash causes backlash shock and affects the smoothness of the gear transmission.
The wear of the common worm transmission is easy to occur in the transmission process, and the reason is that the relative movement speed of the transmission pair at the conjugate tooth surface is always greater than the circumferential speed of the worm or the circumferential speed of the worm wheel, so that the relative speed of the contact point at any position is not zero and is always in a sliding friction state, namely, the meshing gears have a larger relative sliding speed, the wear, the heat and the energy consumption of the tooth surface can be caused, and the friction loss power of the common worm transmission is large, the transmission efficiency is low, the tooth surface wear is fast, and the precision life is low.
Chinese patent (publication No. CN203585070U) discloses a plane envelope worm gear transmission slewing bearing, which comprises a worm gear outer ring, an inner ring, a taper pin, a plug, a steel ball, a spacer, a choke and a sealing strip, wherein the outer peripheral surface of the worm gear outer ring is provided with an outer annular arc groove, a through hole is formed in a plane perpendicular to the outer peripheral surface of the outer ring, the choke is arranged in the through hole, the outer peripheral surface of the inner ring is provided with the outer annular arc groove, the inner peripheral surface of the outer ring is provided with an inner annular arc groove, the inner annular arc groove and the outer annular arc groove are mutually matched to form a raceway for the running of the ball, the inner ring is provided with a pin hole and a plug hole, the plug is provided with a through. The patent improves the transmission efficiency and the bearing capacity, reduces the vibration and the noise during the operation, is easy to manufacture, and more easily realizes the precise processing and the hardening grinding which completely accord with the meshing principle. However, this patent has at least the following drawbacks: the problem of large transmission backlash exists in the patent, so that a large return error exists, noise and heat can be generated during work, and the problems of abrasion and abrasion of a worm wheel and/or a worm are aggravated; the existence of the meshing clearance in the patent can cause larger accumulated error, and the transmission precision, the position precision and the dynamic response characteristic of the whole system are seriously influenced; the sliding friction between the tooth surfaces of the transmission meshing gear inevitably has the problem of serious tooth surface abrasion, and has certain functional defects. Therefore, the present invention provides a rotary member driven by rolling elements, which overcomes the deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
To the deficiency of the prior art, the utility model provides a by rolling element driven gyration part, at least include the worm wheel with rolling element on the worm wheel, the worm wheel can be connected with body of rod meshing the rolling element winds under the axis pivoted condition of worm wheel, the rolling element according to with the mode of body of rod local line contact is with mechanical force transmission extremely the body of rod to form the rotation of no return stroke error, wherein: the rolling bodies at least comprise a first rolling body and a second rolling body, and the first rolling body and the second rolling body are in line contact with the local part of the rod body respectively according to a staggered distribution mode.
According to a preferred embodiment, the worm wheel comprises at least a first worm wheel and a second worm wheel, wherein: the first rolling element is arranged on the first worm wheel, and the second rolling element is arranged on the second worm wheel.
According to a preferred embodiment, the first rolling elements are arranged on the first worm wheel in a circumferentially distributed manner, and the second rolling elements are arranged on the second worm wheel in a circumferentially distributed manner, wherein: when the first worm wheel and the second worm wheel together form the worm wheel, the first rolling elements and the second rolling elements are provided on the worm wheel so as to be circumferentially staggered.
According to a preferred embodiment, a spiral path is provided on the rod, and at any time when the rod rotates, the first rolling element and the second rolling element always abut against the inside of the spiral path, and the first rolling element is engaged with a first tooth surface of the spiral path, and the second rolling element is engaged with a second tooth surface of the spiral path.
According to a preferred embodiment, the worm wheel is provided with a rotating shaft, wherein: under the condition that the rod body rotates and the screw channel exerts radial force and tangential force on the rolling body, the rolling body rotates under the action of the radial force, and the worm wheel rotates around the axis of the worm wheel in a mode that the tangential force is transmitted to the worm wheel through the rotating shaft.
According to a preferred embodiment, when a plurality of the rolling elements are simultaneously subjected to respective radial forces, the rolling elements near the axial middle portion of the rod body are subjected to a greater radial force than the rolling elements near the axial ends of the rod body.
According to a preferred embodiment, when a plurality of the rolling elements are simultaneously subjected to respective radial forces, the tangential force applied to the rolling elements near the axial middle portion of the rod body is smaller than the tangential force applied to the rolling elements near the axial ends of the rod body.
According to a preferred embodiment, the shank is provided with a thread, which is able to form the screw channel.
According to a preferred embodiment, the lead angle of one side of the thread is arranged to vary continuously, and the thread having the same lead angle is arranged on both sides of the raceway in the case where the rolling elements are in contact with the raceway.
According to a preferred embodiment, in the case where the rolling element is a rolling cone, a line of contact of the rolling element with the raceway tooth surface is a straight line.
The utility model discloses have one or more in following beneficial technological effect at least:
(1) the utility model discloses a set up first rolling element and second rolling element and make first rolling element and second rolling element on the worm wheel can effectively get rid of the sideshake that exists in the transmission, normal transmission and good lubrication have been guaranteed, and through the mode with first rolling element and second rolling element dislocation, return stroke error in the transmission has been eliminated, noise and heat in the work of having avoided, and aggravate the wearing and tearing problem of worm wheel and/or worm, the stability of worm wheel and worm has been guaranteed and life has been promoted.
(2) The utility model discloses a set up rolling element and spiral shell way and make the rolling element drive the body of rod and rotate according to the mode with spiral shell way local line contact, sliding friction between the meshing surface of traditional transmission converts the rolling friction between the meshing surface into, very big reduction the frictional force between the meshing surface, thereby make the user can need not consider the teeth of a cogwheel friction expansion of generating heat and the dead problem of card, namely the user need not set up the meshing side gap and die in order to prevent the teeth of a cogwheel card, the accumulative error that the meshing gap leads to has been avoided, entire system's transmission precision has been promoted greatly, position accuracy and dynamic response characteristic.
(3) The utility model discloses an adopt first rolling element and second rolling element staggered arrangement in the transmission, wherein the meshing of the first flank of tooth of first rolling element and screw channel, second rolling element and the contact of the second flank of tooth of screw channel make rolling element and screw channel flank of tooth remain the contact throughout to realize not having the transmission of side gap and having the automatic gap function that disappears, avoided the more serious problem of flank of tooth wearing and tearing effectively.
Drawings
FIG. 1 is a simplified structural connection schematic of a side view of a rotating member driven by rolling elements according to the present invention;
FIG. 2 is a simplified connection diagram of the driving rod and the worm wheel according to the present invention; and
fig. 3 is a simplified structural connection diagram of the first rolling element and the second rolling element according to the present invention.
List of reference numerals
1: the worm wheel 2: rolling element 3: rod body
11: first worm wheel 12: second worm wheel 13: first rolling element
14: second rolling element 15: rotating shaft 31: screw way
32: thread 33: first tooth face 34: second flank
Detailed Description
As shown in fig. 1, a revolving part driven by rolling elements at least comprises a worm wheel 1 and rolling elements 2 on the worm wheel 1, the worm wheel 1 can be meshed with a rod 3, wherein: in the case where the rolling element 2 rotates around the axis of the worm wheel 1, the rolling element 2 transmits mechanical force to the rod 3 in such a manner as to be in partial line contact with the rod 3, and rotation without return error is formed.
Preferably, when the worm wheel 1 rotates, the first worm wheel 11 and the second worm wheel 12 in the worm wheel 1 can partially make line contact with the rod 3 and drive the first rolling body 13 and the second rolling body 14 to rotate around the axis of the worm wheel 1, while the first rolling body 13 is engaged with the first tooth surface 33 of the screw path 31, and the second rolling body 14 is engaged with the second tooth surface 34 of the screw path 31.
Preferably, the first rolling body 13 and the second rolling body 14 on the worm wheel 1 can effectively remove side clearances existing in transmission, so that normal transmission and good lubrication are ensured, return errors in transmission are eliminated by arranging the first rolling body 13 and the second rolling body 14 in a staggered manner, noise and heat generated in work are avoided, the problems of abrasion and scratch of the worm wheel 1 and/or the worm 3 are aggravated, the stability of the worm wheel 1 and the worm 3 is ensured, and the service life is prolonged.
Preferably, the local line contact means: when the rolling elements are engaged with the threads, "60% to 90% or more" in contact relationship with each other takes a contact manner of line contact.
Preferably, the rolling bodies 2 are exchangeable and made of a softer alloy, such as a copper alloy; the rod body 3 is made of harder material and is made of nitriding alloy steel.
According to a preferred embodiment, the worm wheel 1 comprises at least a first worm wheel 11 and a second worm wheel 12, wherein: the first worm wheel 11 is provided with first rolling bodies 13 and the second worm wheel 12 is provided with second rolling bodies 14.
Preferably, the first worm wheel 11 and the second worm wheel 12 can be fixedly connected with each other by means of adhesive compounding and/or welding.
According to a preferred embodiment, as shown in fig. 3, the first rolling elements 13 are arranged on the first worm wheel 11 in a circumferentially evenly distributed manner, and the second rolling elements 14 are arranged on the second worm wheel 12 in a circumferentially evenly distributed manner, wherein: when the first worm wheel 11 and the second worm wheel 12 together form the worm wheel 1, the first rolling elements 13 and the second rolling elements 14 are provided on the worm wheel 1 so as to be circumferentially offset.
Preferably, the utility model discloses an adopt first rolling element 13 and the dislocation of second rolling element 14 to arrange in the transmission, wherein first rolling element 13 and the meshing of the first flank of tooth 33 of screw way, second rolling element 14 and the meshing of screw way second flank of tooth 34 make rolling element 2 and the contact of keeping all the time of screw way flank of tooth to realize not having the transmission of backlash and have the automatic gap function that disappears, avoided the more serious problem of flank of tooth wearing and tearing effectively.
According to a preferred embodiment, the rod 3 is provided with a channel 31, and at any time when the rod 3 rotates, the first rolling element 13 and the second rolling element 14 always abut against the channel 31, and the first rolling element 13 is engaged with a first tooth surface 33 of the channel 31, and the second rolling element 14 is engaged with a second tooth surface 34 of the channel 31.
According to a preferred embodiment, as shown in fig. 2, a worm wheel 1 is provided with a rotating shaft 15, and rolling bodies 2 are provided on the rotating shaft 15, wherein: when the rod 3 rotates and the raceway 31 applies a radial force and a tangential force to the rolling elements 2, the rolling elements 2 rotate by the radial force, and the worm wheel 1 rotates around the axis of the worm wheel 1 in such a manner that the tangential force is transmitted to the worm wheel 1 through the rotary shaft 15.
Preferably, the radial force is a force in a direction in which the force bearing point of the rolling body 2 points to the center of the rolling body 2, and the tangential force is a force in a direction in which the force bearing point of the rolling body 2 extends tangentially.
Preferably, the shaft 22 may be a rotating shaft so that the relative sliding between the engaging surfaces is substantially entirely converted into relative rolling, thereby reducing friction and improving transmission efficiency.
More preferably, the shaft 22 may be a lightweight slewing bearing of the conventional prior art in the art.
According to a preferred embodiment, in the case where a plurality of rolling elements 2 are simultaneously subjected to respective radial forces, the rolling elements 2 near the axial middle position of the rod 3 are subjected to a greater radial force than the rolling elements 2 near the axial ends of the rod 3.
According to a preferred embodiment, in the case where a plurality of rolling elements 2 are simultaneously subjected to respective radial forces, the tangential force to which the rolling elements 2 are subjected is smaller near the axial middle of the rod 3 than the tangential force to which the rolling elements 2 are subjected near the axial ends of the rod 3.
According to a preferred embodiment, the rod 3 is provided with a thread 32, the thread 32 being able to form a channel 31, the thread 32 being distributed in a uniform pitch in the direction from the axial ends to the axial centre of the rod 3, and the depth of the channel 31 being the same.
According to a preferred embodiment, the lead angle of one side of the thread 32 is arranged to vary continuously, and in case the rolling elements 2 are in contact with the raceway 31, both sides of the raceway 31 are provided with threads 32 having the same lead angle.
Preferably, both ends of the rod body 3 can be provided with a threaded end cover, and the radius of the threaded end cover is larger than that of the rod body 3. Preferably, a sealing ring and a dust ring are arranged on the screw end cover to prevent air leakage from the rod body 3 and prevent external dust from mixing into the box body, so that the friction force between the rod body 3 and the rolling body 2 is increased.
According to a preferred embodiment, in the case where the rolling body 2 is a rolling cone, the contact line of the rolling body 2 with the tooth surface of the raceway 31 is a straight line, and the contact line is perpendicular to the axis of the rod 3.
Preferably, in the case that the rolling elements 2 are rolling cones, the thread 32 can reduce the meshing clearance between the rolling cones and the screw channel 31 in a manner of increasing and/or decreasing the rate of change of the lead angle, and thus, the accumulated error caused by the meshing clearance is avoided.
Preferably, the solving formula for the contact line may be:
when theta is equal to 0, pi]Then, the obtained contact line is the contact line meshed with the first tooth surface of the worm, and the contact line is formed by the roller surface corresponding to the corresponding position when theta is epsilon [ -pi, 0]The contact line determined is the contact line meshing with the second flank of the worm.
Preferably, the utility model discloses a set up rolling element 2 and screw channel 31 and make rolling element 2 drive the body of rod 3 and rotate according to the mode with screw channel 31 local line contact, sliding friction between the meshing surface of traditional transmission converts the rolling friction between the meshing surface into, very big reduction the frictional force between the meshing surface, thereby make the user can need not consider the teeth of a cogwheel friction expansion of generating heat and the dead problem of card, the user need not set up the meshing side gap in order to prevent the teeth of a cogwheel card dead, the accumulative error that the meshing gap leads to has been avoided, entire system's transmission precision, position accuracy and dynamic response characteristic have been promoted greatly.
It should be noted that the above-mentioned embodiments are exemplary, and those skilled in the art can devise various solutions in light of the present disclosure, which are also within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present specification and drawings are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.
Claims (10)
1. Revolving part driven by rolling bodies, comprising at least a worm wheel (1) and rolling bodies (2) on said worm wheel (1), characterized in that,
the worm wheel (1) can be meshed with a rod body (3), and under the condition that the rolling body (2) rotates around the axis of the worm wheel (1), the rolling body (2) transmits mechanical force to the rod body (3) in a manner of being in partial line contact with the rod body (3) and forms rotation without return error, wherein:
the rolling bodies (2) at least comprise a first rolling body (13) and a second rolling body (14), and the first rolling body (13) and the second rolling body (14) are in partial line contact with the rod body (3) in a staggered distribution mode.
2. Revolving part driven by rolling bodies according to claim 1, characterized in that the worm wheel (1) comprises at least a first worm wheel (11) and a second worm wheel (12), wherein:
the first rolling element (13) is arranged on the first worm wheel (11), and the second rolling element (14) is arranged on the second worm wheel (12).
3. A revolving unit driven by rolling bodies according to claim 2, characterized in that the first rolling bodies (13) are arranged in a circumferentially distributed manner on the first worm wheel (11) and the second rolling bodies (14) are arranged in a circumferentially distributed manner on the second worm wheel (12), wherein:
when the first worm wheel (11) and the second worm wheel (12) together form the worm wheel (1), the first rolling elements (13) and the second rolling elements (14) are arranged on the worm wheel (1) so as to be circumferentially offset.
4. Revolving unit driven by a rolling element according to claim 3, characterized in that the rod (3) is provided with a raceway (31),
at any time when the rod (3) rotates, the first rolling element (13) and the second rolling element (14) always abut against the inside of the screw channel (31), and
the first rolling element (13) meshes with a first flank (33) of the spiral (31), and the second rolling element (14) meshes with a second flank (34) of the spiral (31).
5. Revolving part driven by rolling bodies according to claim 4, characterized in that the worm wheel (1) is provided with a rotation shaft (15), wherein:
under the condition that the rod body (3) rotates and the screw channel (31) exerts radial force and tangential force on the rolling body (2), the rolling body (2) rotates under the action of the radial force and
the worm wheel (1) rotates around the axis of the worm wheel (1) in a mode that the tangential force is transmitted to the worm wheel (1) through the rotating shaft (15).
6. A revolving unit driven by a rolling body according to claim 1, characterized in that, in case a plurality of rolling bodies (2) are simultaneously subjected to respective radial forces, the rolling bodies (2) near the axial middle of the rod (3) are subjected to a radial force greater than the radial forces to which the rolling bodies (2) near the axial ends of the rod (3) are subjected.
7. A revolving unit driven by a rolling element according to claim 6, characterized in that, in case a plurality of rolling elements (2) are simultaneously subjected to respective radial forces, the tangential forces to which the rolling elements (2) are subjected close to the axial middle of the rod (3) are smaller than the tangential forces to which the rolling elements (2) are subjected close to the axial ends of the rod (3).
8. A revolving unit driven by a rolling element according to claim 4, characterized in that the rod (3) is provided with a thread (32), which thread (32) is able to form the track (31).
9. A revolving part driven by a rolling element according to claim 8, characterized in that the lead angle of one side of the thread (32) is arranged to vary continuously, and in the case of contact of the rolling element (2) with the track (31), the thread (32) is arranged with the same lead angle on both sides of the track (31).
10. A revolving unit driven by a rolling element according to claim 9, characterized in that the contact line of the rolling element (2) with the flank of the raceway (31) is straight in the case of a rolling cone for the rolling element (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920910121.8U CN210770042U (en) | 2019-06-17 | 2019-06-17 | Rotary part driven by rolling body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920910121.8U CN210770042U (en) | 2019-06-17 | 2019-06-17 | Rotary part driven by rolling body |
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| CN210770042U true CN210770042U (en) | 2020-06-16 |
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| CN201920910121.8U Active CN210770042U (en) | 2019-06-17 | 2019-06-17 | Rotary part driven by rolling body |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153981A (en) * | 2021-05-18 | 2021-07-23 | 成都理工大学 | Worm and worm gear transmission device with zero clearance |
| CN113153980A (en) * | 2021-05-18 | 2021-07-23 | 成都理工大学 | Split type worm and drive mechanism thereof |
| CN113175499A (en) * | 2021-05-18 | 2021-07-27 | 成都理工大学 | Worm wheel with spherical roller and transmission mechanism thereof |
| CN113175500A (en) * | 2021-05-18 | 2021-07-27 | 成都理工大学 | Ball roller worm gear and worm transmission device and system |
-
2019
- 2019-06-17 CN CN201920910121.8U patent/CN210770042U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153981A (en) * | 2021-05-18 | 2021-07-23 | 成都理工大学 | Worm and worm gear transmission device with zero clearance |
| CN113153980A (en) * | 2021-05-18 | 2021-07-23 | 成都理工大学 | Split type worm and drive mechanism thereof |
| CN113175499A (en) * | 2021-05-18 | 2021-07-27 | 成都理工大学 | Worm wheel with spherical roller and transmission mechanism thereof |
| CN113175500A (en) * | 2021-05-18 | 2021-07-27 | 成都理工大学 | Ball roller worm gear and worm transmission device and system |
| CN113153981B (en) * | 2021-05-18 | 2022-04-08 | 成都理工大学 | Worm and worm gear transmission device with zero clearance |
| CN113175500B (en) * | 2021-05-18 | 2022-04-08 | 成都理工大学 | Ball roller worm gear and worm transmission device and system |
| CN113175499B (en) * | 2021-05-18 | 2022-04-08 | 成都理工大学 | Worm wheel with spherical roller and transmission mechanism thereof |
| CN113153980B (en) * | 2021-05-18 | 2022-04-08 | 成都理工大学 | Split type worm and drive mechanism thereof |
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