CN110091203B - Fast-assembling type lead screw prestretches structure - Google Patents
Fast-assembling type lead screw prestretches structure Download PDFInfo
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- CN110091203B CN110091203B CN201910451675.0A CN201910451675A CN110091203B CN 110091203 B CN110091203 B CN 110091203B CN 201910451675 A CN201910451675 A CN 201910451675A CN 110091203 B CN110091203 B CN 110091203B
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- bearing
- lead screw
- box
- bearing box
- spigot
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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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0003—Arrangements for preventing undesired thermal effects on tools or parts of the machine
- B23Q11/0007—Arrangements for preventing undesired thermal effects on tools or parts of the machine by compensating occurring thermal dilations
-
- 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
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
Abstract
The invention discloses a quick-assembly type lead screw pre-stretching structure which comprises a bearing seat fixedly arranged on a machine tool, a lead screw and a supporting bearing fixed on the lead screw, wherein a bearing box is arranged between the bearing seat and the supporting bearing, the bearing box is contacted with an outer ring of the supporting bearing, the outer side of the supporting bearing is axially compressed, the end surface of an inner ring at the other end of the supporting bearing is axially compressed by an inner ring of a pressing bearing sleeved on the lead screw, and the inner ring of the pressing bearing is axially compressed by a nut screwed on the lead screw; the gasket includes a plurality of sectorial sub-gaskets, and all sub-gaskets can enclose into a circular ring form packing ring in order to form the gasket, sub-gasket's inboard has a plurality of breach, the size of breach must make all sub-gaskets follow when bearing box's radial is drawn close and is pasted on bearing box, ejecting screw and locking screw just are located in the breach. The invention has convenient assembly and disassembly and good pretensioning effect on the lead screw.
Description
Technical Field
The invention belongs to the technical field of numerical control machines, and particularly relates to a quick-mounting type lead screw pre-stretching structure.
Background
The lead screw is used as a precision part in a numerical control machine tool, the machining precision of the numerical control machine tool is directly concerned, and the lead screw can generate thermal elongation deformation due to the thermal influence generated in high-speed work, so that the lead screw needs to be stretched to a certain degree in advance during installation so as to reduce the thermal elongation during work as much as possible and ensure the motion precision and rigidity of a transmission part.
Disclosure of Invention
The invention aims to solve the technical problems and provides a quick-assembly type lead screw pre-stretching structure which can be quickly assembled and disassembled and has a good lead screw pre-stretching effect.
The technical scheme of the invention is as follows: a quick-assembly type lead screw pre-stretching structure comprises a bearing seat fixedly mounted on a machine tool, a lead screw and a supporting bearing fixed on the lead screw, wherein a bearing box is mounted between the bearing seat and the supporting bearing, the bearing box is in contact with an outer ring of the supporting bearing, the outer side of the supporting bearing is axially compressed, a gap is reserved between the bearing seat and the bearing box, an ejection screw penetrating through the gap is arranged between the bearing box and the bearing seat, the bearing box extrudes the outer ring of the supporting bearing outwards, and a gasket is arranged between the bearing seat and the bearing box;
the bearing box is of a barrel-shaped structure, an inner spigot formed by inward flanging is arranged at the bottom end opening of the bearing box, an outer spigot formed by outward flanging is arranged at the top end opening of the bearing box, the bearing box is embedded into the bearing seat from the end face of the bearing seat, the outer spigot and the end face of the bearing seat form the gap, the ejection screw is screwed in from the end face of the outer spigot, penetrates through the gap and then abuts against the end face of the bearing seat, and the locking screw penetrates through the end face of the outer spigot and is screwed in the bearing seat; the support bearing is coaxially embedded into the barrel-shaped structure of the bearing box, the end face of the outer ring of one end of the support bearing is contacted with the inner spigot, the end face of the outer ring of the other end of the support bearing is pressed by an outer ring of a press bearing which is coaxially inserted into the bearing box, the outer ring of the press bearing is fixedly connected with the bearing box, the end face of the inner ring of the other end of the support bearing is axially pressed by an inner ring of the press bearing which is sleeved on the screw rod, and the inner ring of the press bearing is axially pressed by a nut which is screwed on the screw rod;
the gasket includes a plurality of sectorial sub-gaskets, and all sub-gaskets can enclose into a ring form packing ring in order to form the gasket, the inboard of sub-gasket has a plurality of breach, the size of breach must make all sub-gaskets follow when bearing box's radial is drawn close and is pasted on bearing box, ejecting screw and locking screw just are located in the breach.
Further, the sub-gaskets are two identical semicircular arc-shaped sheet bodies.
Further, the support bearing includes a pair disposed in series.
Further, the outer ring of the pressure bearing comprises a cylindrical pipe section, an outward-turned outer spigot is arranged at one end of the cylindrical pipe section, the cylindrical pipe section is inserted into the bearing box, and the outer spigot of the cylindrical pipe section is tightly attached to the end face of the bearing box.
Furthermore, the outer spigot of the cylindrical pipe section is tightly attached to the end face of the bearing box and connected through a bolt.
Furthermore, the end face of the ejection screw is of a plane structure.
Further, the inner ring of the press bearing and the outer ring of the press bearing are integrally formed.
Furthermore, the inner ring of the press bearing and the outer ring of the press bearing are connected into a whole through a plurality of connecting rods, and the connecting rods are arranged between the inner ring of the press bearing and the outer ring of the press bearing along the radial direction.
Furthermore, one end of the inner ring of the pressure bearing, which is far away from the support bearing, is also provided with an inward-turned inner spigot, and the surface of an inner hole of the inner spigot is provided with a screw hole matched with the thread of the end part of the lead screw.
Furthermore, a plurality of U-shaped notches are formed in the outer circumferential surface of one end, away from the supporting bearing, of the outer ring of the pressing bearing.
The invention has the beneficial effects that: the invention optimizes the pre-stretching structure of the lead screw, makes specific limitation description on the structure of the original bearing seat, the original bearing box, the original outer ring of the pressing bearing and the original inner ring of the pressing bearing, and correspondingly optimizes the corresponding connection and installation modes of the ejection screw and the locking screw, so that the whole structure is more compact, and the axial stretching force can be better applied to the lead screw through the supporting bearing. Meanwhile, the invention also adopts a detachable fast-assembly structure which is divided into a plurality of sections from the middle of the adjusting pad (gasket), preferably a symmetrical two-piece structure, and changes the original screw round hole on the gasket into an open gap, thereby realizing the purpose of inserting the gasket (sub-gasket) from two sides, avoiding the sealing gasket structure of the original structure, and thus thoroughly avoiding the following problems: after the required gap size is measured, parts such as a bearing inner ring pressing sleeve, a bearing outer ring pressing cover, a bearing box and the like need to be disassembled, and then a ground closed structure ring adjusting pad needs to be assembled, so that a series of complicated operations are required. The improved gasket is well measured, the gasket can be easily put in from two sides after being ground according to the size without disassembling parts such as a bearing seat, a bearing box, an outer ring of a pressing bearing, an inner ring of the pressing bearing and the like, the improvement is not large, but the effect of improving the assembly speed is remarkably.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an exploded view of the present invention.
FIG. 3 is a schematic end view of an integrated structure of an outer ring of a pressure bearing and an inner ring of a pressure bearing.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1, a quick-assembly type lead screw pre-stretching structure comprises a bearing seat 8 fixedly mounted on a machine tool, a lead screw, and a support bearing 5 fixed on the lead screw, wherein a bearing box 1 is mounted between the bearing seat 8 and the support bearing 5, the bearing box 1 is in contact with the outer ring of the support bearing 5, the outer side of the support bearing 5 is axially compressed, a gap 9 is reserved between the bearing seat 8 and the bearing box 1, an ejection screw penetrating through the gap 9 is arranged between the bearing box 1 and the bearing seat 8, the bearing box 1 extrudes the outer ring of the support bearing 5 to the outside, and a gasket 2 is arranged between the bearing seat 8 and the bearing box 1. Crucially, as shown in fig. 2, the bearing box 1 of this embodiment is a barrel-shaped structure, the bottom port of the bearing box has an inner spigot formed by inward flanging, the top port of the bearing box has an outer spigot formed by outward flanging, the bearing box 1 is embedded into the bearing seat 8 from the end surface of the bearing seat 8, the outer spigot and the end surface of the bearing seat 8 form the gap 9, the ejector screw is screwed in from the end surface of the outer spigot and penetrates through the gap 9 to be pressed against the end surface of the bearing seat 8, and the locking screw 10 is screwed in the bearing seat 8 through the end surface of the outer spigot; the support bearing 5 is coaxially embedded into the barrel-shaped structure of the bearing box 1, the outer ring end face of one end of the support bearing 5 is in contact with the inner spigot, the outer ring end face of the other end of the support bearing 5 is pressed by a press bearing outer ring 7 coaxially inserted into the bearing box 1, the press bearing outer ring 7 is fixedly connected with the bearing box 1, the inner ring end face of the other end of the support bearing 5 is axially pressed by a press bearing inner ring 6 sleeved on the lead screw, and the press bearing inner ring 6 is axially pressed by a nut 3 screwed on the lead screw.
The gasket 2 comprises a plurality of fan-shaped sub-gaskets 11, all the sub-gaskets 11 can enclose a circular gasket to form the gasket 2, the inner side of each sub-gasket 11 is provided with a plurality of gaps 901, the size of each gap 901 needs to enable the ejection screws and the locking screws to be just positioned in the gaps 901 when all the sub-gaskets 11 are close to each other along the radial direction of the bearing box 1 and are attached to the bearing box 1, and the gaps 901 are preferably made into a semicircular shape. In practical implementation, the sub-gaskets 11 are two identical semicircular arc-shaped sheet bodies so as to be assembled and disassembled most conveniently. The support bearing 5 comprises a pair of support bearings which are arranged in series, so that the stretchability can be improved, and the stability and the reliability of the screw during rotation can be ensured.
In a specific embodiment, the outer ring 7 of the pressure bearing comprises a cylindrical pipe section, an outward-turned outer spigot is arranged at one end of the cylindrical pipe section, the cylindrical pipe section is inserted into the bearing box 1, and the outer spigot of the cylindrical pipe section is tightly attached to the end surface of the bearing box 1, so that the end surface of the outer ring of the support bearing 5 can be better pressed, and can be fixedly connected with the bearing box 1, so that the integral installation is convenient, for example, during assembly, the outer spigot of the cylindrical pipe section is tightly attached to the end surface of the bearing box 1 through bolts, and the assembly is simplified.
The end face of the ejection screw is of a plane structure so as to be better contacted with the bearing seat 8 and separated from the bearing seat in a jacking mode. In addition, the inner ring 6 of the press bearing and the outer ring 7 of the press bearing are integrally formed, so that the installation is more convenient, and the inner ring and the outer ring of the support bearing 5 can be respectively tightly propped through an integral part. In order to achieve this integral mounting effect, the inner ring 6 and the outer ring 7 are integrally connected by a plurality of connecting rods 12, and the connecting rods 12 are radially arranged between the inner ring 6 and the outer ring 7. On the basis of the structure, furthermore, one end of the inner ring 6 of the press bearing, which is far away from the support bearing 5, is also provided with an inward-turned inner spigot, and the surface of an inner hole of the inner spigot is provided with a screw hole matched with the thread at the end part of the lead screw, namely, the inner ring 6 of the press bearing and the outer ring 7 of the press bearing can be integrally and directly connected onto the lead screw, and axially pressed together with the nut 3, so that the double-insurance effect of double-axis fixation is achieved. Meanwhile, the outer circumferential surface of one end of the outer ring 7 of the press bearing, which is far away from the support bearing 5, is provided with a plurality of U-shaped notches, so that when the integrated structure of the inner ring 6 of the press bearing and the outer ring 7 of the press bearing is screwed on the screw rod, the screw rod can be rotated by a [ shaped wrench, and the screw rod is convenient to assemble and disassemble.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. A quick-assembly type lead screw pre-stretching structure comprises a bearing seat (8) fixedly mounted on a machine tool, a lead screw and a supporting bearing (5) fixed on the lead screw, wherein a bearing box (1) is mounted between the bearing seat (8) and the supporting bearing (5), the bearing box (1) is in contact with the outer ring of the supporting bearing (5), the outer side of the supporting bearing (5) is axially compressed, a gap (9) is reserved between the bearing seat (8) and the bearing box (1), an ejection screw (4) penetrating through the gap (9) is arranged between the bearing box (1) and the bearing seat (8), the outer ring of the supporting bearing (5) is extruded outwards by the bearing box (1), and a gasket (2) is arranged between the bearing seat (8) and the bearing box (1); the method is characterized in that:
the bearing box (1) is of a barrel-shaped structure, an inner spigot formed by inward flanging is arranged at the bottom end opening of the bearing box, an outer spigot formed by outward flanging is arranged at the top end opening of the bearing box, the bearing box (1) is embedded into the bearing seat (8) from the end surface of the bearing seat (8), the outer spigot and the end surface of the bearing seat (8) form the gap (9), the ejection screw (4) is screwed in from the end surface of the outer spigot, penetrates through the gap (9) and then abuts against the end surface of the bearing seat (8), and the locking screw (10) penetrates through the end surface of the outer spigot and is screwed into the bearing seat (8); the support bearing (5) is coaxially embedded into the barrel-shaped structure of the bearing box (1), the outer ring end face of one end of the support bearing (5) is contacted with the inner spigot, the outer ring end face of the other end of the support bearing (5) is pressed by a press bearing outer ring (7) coaxially inserted into the bearing box (1), the press bearing outer ring (7) is fixedly connected with the bearing box (1), the inner ring end face of the other end of the support bearing (5) is axially pressed by a press bearing inner ring (6) sleeved on a lead screw, the press bearing inner ring (6) is axially pressed by a nut (3) screwed on the lead screw, the press bearing inner ring (6) and the press bearing outer ring (7) are connected into a whole through a plurality of connecting rods, the connecting rods are arranged between the press bearing inner ring (6) and the press bearing outer ring (7) along the radial direction, one end of the press bearing inner ring (6) departing from the support bearing (5) is also provided with an inner spigot which is turned inwards, the surface of an inner hole of the inner spigot is provided with a screw hole matched with the thread at the end part of the lead screw;
gasket (2) include a plurality of sectorial sub-gaskets (11), and all sub-gaskets (11) can enclose into a circular ring form packing ring in order to form gasket (2), the inboard of sub-gasket (11) has a plurality of breach, the size of breach must make all sub-gaskets (11) follow when radially drawing close of bearing box (1), ejecting screw (4) and locking screw (10) just are located in the breach.
2. The quick-assembling lead screw pre-stretching structure as claimed in claim 1, wherein: the sub-gaskets (11) are two identical semicircular arc-shaped sheet bodies.
3. The quick-assembling lead screw pre-stretching structure as claimed in claim 1, wherein: the support bearing (5) comprises a pair arranged in series.
4. The quick-assembling lead screw pre-stretching structure as claimed in claim 1, wherein: the outer ring (7) of the pressure bearing comprises a cylindrical pipe section, wherein one end of the cylindrical pipe section is provided with an outward-turned outer spigot, the cylindrical pipe section is inserted into the bearing box (1), and the outer spigot of the cylindrical pipe section is tightly attached to the end face of the bearing box (1).
5. The quick-assembling lead screw pre-stretching structure as claimed in claim 4, wherein: the outer spigot of the cylindrical pipe section is tightly attached to the end surface of the bearing box (1) and connected through bolts.
6. The quick-assembling lead screw pre-stretching structure as claimed in claim 1, wherein: the end face of the ejection screw (4) is of a plane structure.
7. The quick-assembling lead screw pre-stretching structure as claimed in claim 1, wherein: the inner ring (6) of the press bearing and the outer ring (7) of the press bearing are integrally formed.
8. The quick-assembling lead screw pre-tensioning structure as claimed in claim 1 or 7, wherein: the outer ring (7) of the pressure bearing is also provided with a plurality of U-shaped notches on the outer circumferential surface of one end deviating from the support bearing (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910451675.0A CN110091203B (en) | 2019-05-28 | 2019-05-28 | Fast-assembling type lead screw prestretches structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910451675.0A CN110091203B (en) | 2019-05-28 | 2019-05-28 | Fast-assembling type lead screw prestretches structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110091203A CN110091203A (en) | 2019-08-06 |
| CN110091203B true CN110091203B (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910451675.0A Active CN110091203B (en) | 2019-05-28 | 2019-05-28 | Fast-assembling type lead screw prestretches structure |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113478273A (en) * | 2021-05-25 | 2021-10-08 | 津上精密机床（浙江）有限公司 | Mounting structure and method for reducing thermal deflection of turret machine |
| CN116021322B (en) * | 2023-03-29 | 2023-06-16 | 湖南中大创远数控装备有限公司 | Ball screw prestretching structure convenient for secondary assembly, machine tool and method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203390636U (en) * | 2013-05-03 | 2014-01-15 | 重庆九源机械有限公司 | Lead screw pre-stretching structure |
| CN204512150U (en) * | 2015-02-09 | 2015-07-29 | 乐利财 | Novel gasket |
| CN106321603B (en) * | 2016-11-02 | 2018-10-23 | 苏州热工研究院有限公司 | A kind of sun gasket of nuclear power station steam-water pipe suspension and support |
| CN206246499U (en) * | 2016-12-16 | 2017-06-13 | 尹兵兵 | Excavator bucket spindle exempts to tear axle fast assembling-disassembling pad open |
| CN206500915U (en) * | 2017-03-06 | 2017-09-19 | 常州铸鼎机械有限公司 | The pre-stretching structure of Ball Bearing Lead Screw Fit |
| CN207777615U (en) * | 2018-01-25 | 2018-08-28 | 呼伦贝尔金新化工有限公司 | A kind of combination dock gasket seal |
| CN208681088U (en) * | 2018-07-28 | 2019-04-02 | 重庆宏钢数控机床有限公司 | Bearing block for lead screw pre-stretching |
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