CN112963460B - Rolling coupler - Google Patents
Rolling coupler Download PDFInfo
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- CN112963460B CN112963460B CN202110228070.2A CN202110228070A CN112963460B CN 112963460 B CN112963460 B CN 112963460B CN 202110228070 A CN202110228070 A CN 202110228070A CN 112963460 B CN112963460 B CN 112963460B
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- rectangular
- cross block
- socket
- steel ball
- cross
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- 238000005096 rolling process Methods 0.000 title claims abstract description 48
- 230000008878 coupling Effects 0.000 claims abstract description 53
- 238000010168 coupling process Methods 0.000 claims abstract description 53
- 238000005859 coupling reaction Methods 0.000 claims abstract description 53
- 210000000078 claw Anatomy 0.000 claims abstract description 49
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 33
- 239000010959 steel Substances 0.000 claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 238000003780 insertion Methods 0.000 claims description 2
- 241000282472 Canis lupus familiaris Species 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000033001 locomotion Effects 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
- Transmission Devices (AREA)
Abstract
The present disclosure provides a rolling coupling comprising a driving socket, a cross block, a steel ball and a driven socket; the cross block is arranged between the driving socket and the driven socket, rectangular convex claws or rectangular grooves are arranged at two ends of the cross block, the rectangular grooves or rectangular convex claws are correspondingly arranged on the parts of the driving socket and the driven socket, which are matched with the cross block, the steel ball raceway groove is arranged between the rectangular convex claws and the vertical surfaces of the rectangular grooves, steel balls are arranged in the steel ball raceway groove, and the cross block is guided to move according to the guide of the rectangular convex claws and the rectangular grooves. Therefore, the rolling coupling changes the rotation friction into the rolling friction, has small friction force, overcomes the defects of the Oldham coupling, makes up the error between the transmission shafts, and has high transmission precision and good stability; the device is suitable for transmission equipment of high-grade numerical control machines, precision equipment and detection instruments, and the requirements of use occasions are met without improving the precision of related parts.
Description
Technical Field
The invention relates to the field of mechanical couplings, in particular to a rolling coupling.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Couplings are used for coupling between two shaft ends to transmit torque and motion. Couplings can be divided into two broad categories, rigid couplings and elastic couplings. A rigid coupling can transmit the correct transmission ratio but, because it has no elastic elements, it transmits both shock and vibration as well as torque. The rigid coupling is divided into a fixed rigid coupling and a movable rigid coupling; the former has higher requirement on the coaxiality of the two shafts, otherwise, great additional stress is generated in the coupler and parts connected with the coupler; the latter allows for some misalignment of the axes due to movement of the intermediate rigid part. The elastic coupling has an elastic intermediate element, so that the elastic coupling can reduce the load change and impact of a driven shaft by the elastic element, and can also compensate different axial degrees of intersection of the two shafts caused by the deformation of the shafts during manufacturing, assembling and working, but the elastic coupling can hardly compensate the different axial degrees of parallel and staggered two shafts. Therefore, the couplings with various structures have own advantages and disadvantages, and the couplings with different structures can be selected and used only according to different working conditions.
In practice, for two-axis connection with large parallel phase dislocation and different axiality errors, a cross-shaped sliding block coupler is usually preferentially selected and matched, and other types of couplers can not be used as the power; however, for the connection of two shafts which are staggered in parallel and have different axialities or have larger error of the axialities and require precision or have higher rotating speed, the defects of the Oldham coupling are also very obvious and mainly expressed in the following aspects: (1) a gap exists between the sliding parts, so that the transmission precision is not high; (2) The friction force between the sliding parts is increased along with the increase of the transmission torque, and the transmission efficiency is low; (3) The crosshead shoe rotates and moves simultaneously in the operation process, has slow response and is not suitable for high-speed rotation; (4) Lubrication is required between the sliding parts and it is often not easy to ensure good lubrication. Therefore, the Oldham coupling is not suitable for continuous, long-term operation.
Because the crosshead shoe shaft coupling has the defects, so far, two shafts which are staggered in parallel and have larger error and higher precision or rotating speed are connected, and a more ideal shaft coupling is not available. However, the coupling of two shafts which are staggered in parallel and have larger errors and higher precision or rotating speed is more suitable for high-grade numerical control machines, precision equipment and detecting instruments, and because the coupling cannot compensate for the larger errors of the two coupling shafts, the coupling has to be compensated by adopting a mode of improving the precision of related parts again and again, so that more unnecessary manufacturing cost is greatly increased.
Disclosure of Invention
In order to solve the above problems, the present disclosure provides a rolling coupling. The coupling changes the rotation friction into rolling friction, has small friction, overcomes the defects of the Oldham coupling, makes up the error between transmission shafts, and has high transmission precision and good stability; the device is suitable for transmission equipment of high-grade numerical control machines, precision equipment and detection instruments, and the requirements of use occasions are met without improving the precision of related parts.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
one or more embodiments provide a rolling coupling comprising a driving socket 1, a cross 2, a steel ball 3, and a driven socket 4;
the driving socket 1 is connected with a driving shaft of the transmission equipment, and the driven socket 4 is connected with a driven shaft of the transmission equipment; the cross block 2 is arranged between the driving socket 1 and the driven socket 4, both ends of the cross block 2 are respectively provided with a rectangular convex claw or a rectangular groove, and the rectangular convex claws or the rectangular grooves at both ends of the cross block 2 are mutually vertical; correspondingly, one end of the driving socket 1, which is matched with the cross block 2, is provided with a corresponding rectangular groove or a corresponding rectangular convex claw, and one end of the driven socket 4, which is matched with the cross block 2, is also provided with a corresponding rectangular groove or a corresponding rectangular convex claw; the rectangular grooves or rectangular claws of the driving socket 1 and the driven socket 4 are in direct-insertion fit with the rectangular claws or rectangular grooves matched with the cross block 2;
a gap is reserved between the rectangular convex claw or the rectangular groove of the driving socket 1 or the driven socket 4 and the corresponding rectangular groove or the rectangular convex claw at the two ends of the cross block 2 when the rectangular convex claw or the rectangular groove is matched, steel ball raceway grooves are respectively arranged on the contact vertical surfaces of the rectangular convex claw and the rectangular groove which are matched, and a steel ball 3 is arranged in each steel ball raceway groove to guide the cross block 2 to move according to the guide of the rectangular convex claw and the rectangular groove.
Furthermore, the section of the steel ball raceway groove is formed by three sections of circular arcs, and the radius of the circular arcs on two sides of the steel ball raceway groove is larger than that of the steel ball 3. Therefore, the steel ball 3 is in contact with the ball raceway groove at only two points, and the friction force is small.
Furthermore, two ends of the cross block 2 are provided with rectangular convex claws, and the symmetrical surfaces of the rectangular convex claws are superposed with the axis of the cross block 2.
Furthermore, two ends of the cross block 2 are rectangular grooves, and the symmetry plane of the rectangular grooves is overlapped with the axis of the cross block 2.
Furthermore, one end of the cross block 2 is a rectangular convex claw, the other end of the cross block is a rectangular groove, and the symmetrical surfaces of the rectangular convex claw and the rectangular groove are overlapped with the axis of the cross block 2.
Furthermore, the symmetrical surfaces of the rectangular convex claws at the two ends of the cross block 2 are perpendicular to each other.
Furthermore, the symmetrical surfaces of the rectangular grooves at the two ends of the cross block 2 are perpendicular to each other.
Furthermore, the symmetrical surfaces of the rectangular convex claws and the rectangular grooves at the two ends of the cross block 2 are perpendicular to each other.
Compared with the prior art, this disclosed beneficial effect does:
according to the rolling coupling, the rolling bodies are embedded between the cross block and the driving socket and between the cross block and the driven socket, so that the cross block moves in a rolling friction mode, and the friction force is small; when necessary, pretightening force can be applied to the rolling bodies to eliminate transmission gaps, the defects of the Oldham coupling are completely overcome, not only can the parallel phase error and the non-coaxial error be compensated, but also the transmission precision is high and the stability is good; when the device is used for transmission of high-grade numerical control machine tools, precision equipment and detector devices, the use requirement is not required to be met by improving the precision of related parts.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and do not constitute a limitation thereof.
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic view of a rolling coupling of the present disclosure;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a left side schematic view of FIG. 1;
FIG. 4 isbase:Sub>A schematic sectional view A-A of FIG. 1;
FIG. 5 is a three-dimensional schematic illustration of a rolling coupling of the present disclosure;
FIG. 6 is an exploded schematic view of FIG. 5;
FIG. 7 is a three-dimensional schematic view of a dog cross at both ends of a rolling coupling according to the present disclosure;
FIG. 8 is a schematic view of another form of rolling coupling of the present disclosure;
FIG. 9 is a top view of FIG. 8;
FIG. 10 is a left side schematic view of FIG. 8;
FIG. 11 is a three-dimensional schematic view of another form of rolling coupling of the present disclosure;
FIG. 12 is a three-dimensional schematic view of a cross block with grooves at both ends of a rolling coupling according to the present disclosure;
FIG. 13 is a three-dimensional view of a rolling coupling with a male end pawl and a female end cross;
fig. 14 is a partially enlarged schematic view of an assembly state of a steel ball, a longitudinal rolling groove and a transverse rolling groove of the rolling coupling.
The rolling device comprises a driving socket 1, a cross block 2, a steel ball 3, a driven socket 4, a longitudinal rolling groove 5 and a transverse rolling groove 6.
Detailed Description
The present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments in the present disclosure may be combined with each other. The embodiments will be described in detail below with reference to the accompanying drawings.
Embodiments of the present disclosure provide a rolling coupling, as shown in fig. 1 to 7. The rolling coupling comprises a driving socket 1, a cross block 2, a steel ball 3 and a driven socket 4, wherein the driving socket 1 and the driven socket 4 are respectively connected with a driving shaft and a driven shaft of a transmission device, the cross block 2 is arranged between the driving socket 1 and the driven socket 4, rectangular convex claws or rectangular grooves are respectively arranged at two ends of the cross block 2, and the rectangular convex claws or the rectangular grooves at two ends of the cross block 2 are mutually vertical to form a cross shape and are called as a cross block; a rectangular groove or a rectangular convex claw is arranged at one end of the driving socket 1 matched with the cross block 2, a rectangular groove or a rectangular convex claw is also arranged at one end of the driven socket 4 matched with the cross block 2, a gap is reserved between the surfaces of the matched rectangular convex claw and the rectangular groove, a steel ball 3 is arranged between the vertical surfaces of the matched rectangular convex claw and the rectangular groove, longitudinal rolling grooves 5 or transverse rolling grooves 6 are respectively arranged on the vertical surfaces of the matched rectangular convex claw and the rectangular groove, and the longitudinal rolling grooves 5 or the transverse rolling grooves 6 on the matched rectangular convex claw are vertical to the transverse rolling grooves 6 on the rectangular groove or the longitudinal rolling grooves 5, namely the axes of the rolling grooves at two sides of any steel ball are vertically distributed; the cross block 2 can move along the direction of the rectangular convex claw and the rectangular groove; because the rolling bodies are embedded between the cross block 2 and the driving socket 1 and the driven socket 4, the movement of the cross block 2 is a rolling friction pair.
Therefore, the present structure overcomes the following drawbacks of the oldham coupling: (1) a gap exists between the sliding parts, and the transmission precision is not high; (2) The friction force between the sliding parts is increased along with the increase of the transmission torque, and the transmission efficiency is low; (3) The crosshead shoe rotates and moves simultaneously in the operation process, has slow response and is not suitable for high-speed rotation; (4) Lubrication is needed between sliding parts, and continuous and long-time operation is not suitable.
Preferably, as shown in fig. 14, the steel ball 3 is placed in the steel ball raceway grooves of the cross block 2, the driving socket 1 and the driven socket 4, the section of the steel ball raceway groove is formed by three sections of circular arcs, and the radius R of the circular arcs at two sides of the steel ball guide groove is larger than the radius R of the steel ball 3, so that the steel ball 3 is in two-point contact with the steel ball raceway grooves; so as to apply pretightening force and improve the transmission precision. Therefore, the cross block rolling coupler can make up for parallel phase dislocation different shaft errors in a larger range, and meets the requirement of precise or high-rotating-speed two-shaft coupling; the problem of high-grade digit control machine tool, precision equipment and detecting instrument's hub connection is solved.
Preferably, as shown in fig. 5, 6 and 7, the two ends of the cross block 2 are in a rectangular claw structure, the symmetrical surfaces of the rectangular claws at the two ends pass through the axis of the cross block 2, and the symmetrical surfaces of the rectangular claws at the two ends are perpendicular to each other; the manufacturing process is good and the cost is low.
Preferably, as shown in fig. 11 and 12, two ends of the cross block 2 are in a rectangular groove structure, the symmetric planes of the rectangular grooves at the two ends pass through the axis of the cross block 2, and the symmetric planes of the rectangular grooves at the two ends are perpendicular to each other; high rigidity and large bearing torque.
Preferably, as shown in fig. 13, one end of the cross block 2 is in a rectangular convex claw structure, the other end of the cross block is in a rectangular groove structure, the symmetry planes of the rectangular convex claw and the rectangular groove cross the axis of the cross block 2, and the symmetry planes of the rectangular convex claw and the rectangular groove are perpendicular to each other; the installation is convenient, is suitable for more equipment.
It is worth mentioning that, the rolling body is embedded between the cross block and the driving socket and the driven socket, the movement of the cross block is rolling friction, the friction force is small, and when necessary, pretightening force can be applied to the rolling body to eliminate the transmission gap, thereby completely overcoming the defect of the cross sliding block coupling.
The same and similar parts in the various embodiments in this specification may be referred to each other.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (7)
1. A rolling shaft coupling is characterized by comprising a driving socket (1), a cross block (2), a steel ball (3) and a driven socket (4);
the driving socket (1) is connected with a driving shaft of the transmission equipment, and the driven socket (4) is connected with a driven shaft of the transmission equipment; the cross block (2) is arranged between the driving socket (1) and the driven socket (4), rectangular convex claws or rectangular grooves are respectively arranged at two ends of the cross block (2), and the rectangular convex claws or the rectangular grooves at two ends of the cross block (2) are perpendicular to each other; correspondingly, one end of the driving socket (1) matched with the cross block (2) is provided with a corresponding rectangular groove or a corresponding rectangular convex claw, and one end of the driven socket (4) matched with the cross block (2) is also provided with a corresponding rectangular groove or a corresponding rectangular convex claw; the rectangular grooves or rectangular convex claws of the driving socket (1) and the driven socket (4) are in direct insertion matching with the rectangular convex claws or the rectangular grooves matched with the cross block (2);
when the rectangular convex claws or the rectangular grooves of the driving socket (1) or the driven socket (4) are matched with the corresponding rectangular grooves or the rectangular convex claws at the two ends of the cross block (2), gaps are reserved between contact surfaces, the contact vertical surfaces of the matched rectangular convex claws and the rectangular grooves are respectively provided with a steel ball raceway groove, a steel ball (3) is arranged in each steel ball raceway groove, and the cross block (2) is guided to move according to the guide of the rectangular convex claws and the rectangular grooves;
the cross section of the steel ball raceway groove is formed by three sections of circular arcs, the radius of the circular arcs on two sides of the steel ball raceway groove is larger than that of the steel ball (3), and the steel ball (3) is in two-point contact with the steel ball raceway groove.
2. Rolling coupling in accordance with claim 1, characterized in that the cross-piece (2) has rectangular prongs at both ends, the symmetry plane of which coincides with the axis of the cross-piece (2).
3. Rolling coupling in accordance with claim 1, characterized in that the cross-piece (2) has rectangular recesses at both ends, the symmetry plane of which coincides with the axis of the cross-piece (2).
4. Rolling coupling in accordance with claim 1, characterized in that the cross block (2) has rectangular claws at one end and rectangular recesses at the other end, the planes of symmetry of the claws and recesses coinciding with the axis of the cross block (2).
5. Rolling coupling in accordance with claim 2, characterized in that the symmetry planes of the rectangular dogs at both ends of the cross block (2) are perpendicular to each other.
6. Rolling coupling according to claim 3, characterised in that the symmetry planes of the rectangular recesses at both ends of the cross-piece (2) are perpendicular to each other.
7. Rolling coupling according to claim 3, characterised in that the symmetry planes of the rectangular claws and the rectangular recesses at both ends of the cross block (2) are perpendicular to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110228070.2A CN112963460B (en) | 2021-03-02 | 2021-03-02 | Rolling coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110228070.2A CN112963460B (en) | 2021-03-02 | 2021-03-02 | Rolling coupler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112963460A CN112963460A (en) | 2021-06-15 |
| CN112963460B true CN112963460B (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110228070.2A Active CN112963460B (en) | 2021-03-02 | 2021-03-02 | Rolling coupler |
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| Country | Link |
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| CN (1) | CN112963460B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234583A (en) * | 2022-07-18 | 2022-10-25 | 浙矿重工股份有限公司 | Cross coupling with ball pair |
| CN116518677A (en) * | 2023-06-14 | 2023-08-01 | 湖南华通粉体设备科技有限公司 | Novel powder drying equipment |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH476228A (en) * | 1966-07-08 | 1969-07-31 | Luxembourg Brev Participations | Elastic coupling of two rotating shafts |
| JPS57114032A (en) * | 1980-12-29 | 1982-07-15 | Hiroshi Teramachi | Torque transfer type bearing block |
| CN2916245Y (en) * | 2006-06-27 | 2007-06-27 | 梁剑辉 | Fork-joint type universal ball coupling |
| US7985140B2 (en) * | 2008-10-03 | 2011-07-26 | Ford Global Technologies | Zero-lash Oldham coupling |
| CN103591158A (en) * | 2013-11-28 | 2014-02-19 | 青岛科技大学 | Three-fork-lever double-faced steel ball type constant-angular-velocity universal coupling |
| CN106321675A (en) * | 2015-06-30 | 2017-01-11 | 韩永亮 | Universal coupling |
| JP2018021570A (en) * | 2016-08-01 | 2018-02-08 | Ntn株式会社 | Constant-velocity universal joint |
| CN206429561U (en) * | 2016-12-21 | 2017-08-22 | 昆山泰润斯自动化科技有限公司 | A kind of high rigidity sliding cross coupling |
| CN207049219U (en) * | 2017-07-31 | 2018-02-27 | 天津龙创恒盛实业有限公司 | Corrosion-resistant flexible sliding cross coupling |
| CN107514432A (en) * | 2017-10-09 | 2017-12-26 | 青岛科技大学 | A ball type tripod universal joint |
| CN208364625U (en) * | 2018-06-05 | 2019-01-11 | 重庆市灵龙自动化设备有限公司 | Shaft coupling |
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2021
- 2021-03-02 CN CN202110228070.2A patent/CN112963460B/en active Active
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| CN112963460A (en) | 2021-06-15 |
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