CN217344461U - Numerical control machine tool upright post screw pair supporting structure - Google Patents
Numerical control machine tool upright post screw pair supporting structure Download PDFInfo
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- CN217344461U CN217344461U CN202220147128.0U CN202220147128U CN217344461U CN 217344461 U CN217344461 U CN 217344461U CN 202220147128 U CN202220147128 U CN 202220147128U CN 217344461 U CN217344461 U CN 217344461U
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Abstract
The utility model discloses a vice bearing structure of digit control machine tool stand lead screw, including ball screw pair, upper end bearing frame and lower extreme bearing frame, the vice upper end of ball screw is equipped with the upper end bearing frame, and the vice lower extreme of ball screw is equipped with the lower extreme bearing frame, and the ball screw is vice including lead screw and nut seat, and the lead screw is established in the nut seat, and the upper end of lead screw is installed in the upper end bearing frame, and the lower extreme of lead screw is installed in the lower extreme bearing frame. By adopting the technical scheme, the convenient and practical numerical control machine tool stand column screw pair supporting structure is manufactured. The structure of the upper-end precise angular contact ball bearing and the lower-end precise thrust angular contact ball bearing assembly is adopted, so that the bearing capacity of the lead screw pair is increased, and the service life of a machine tool can be effectively prolonged. The bearing adopts an installation mode of fixing one end and free the other end, so that the phenomenon of bearing rotation clamping stagnation caused by the heated extension of the screw rod during processing can be effectively avoided; and the requirement on the machining precision of the size in the vertical direction is reduced, and the manufacturing cost is saved.
Description
Technical Field
The utility model relates to a digit control machine tool field, in particular to vice bearing structure of digit control machine tool stand lead screw.
Background
With the continuous development of intelligent manufacturing, the requirements on the machine tool as an industrial master machine are higher and higher. The upright post is a carrier of a main spindle box of a core component of the horizontal processing machine tool and is mainly used for realizing the movement of the main spindle box in the Y-axis direction; therefore, the bearing capacity, the running precision and the stability of the upright column directly influence the processing performance of the machine tool. At present, the transmission structure of the upright column mainly adopts a ball screw pair form.
The supporting structure of the upright post lead screw pair mainly adopts a combined structure that a precise angular contact ball bearing is used at the upper end and a high-precision composite bearing is used at the lower end. The combined structure can meet the requirement of precision, but the bearing capacity is relatively limited, and the condition that the lower end bearing is damaged already occurs in the using process of a user; if the structure is still adopted, only the high-precision composite bearing with larger specification can be selected to meet the bearing requirement, so that the cost is increased, and the competitiveness of the machine tool is reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a convenient and practical's vice bearing structure of digit control machine tool stand lead screw.
The utility model provides a vice bearing structure of digit control machine tool stand lead screw, including ball screw pair, upper end bearing frame and lower extreme bearing frame, the vice upper end of ball screw is equipped with the upper end bearing frame, the vice lower extreme of ball screw is equipped with the lower extreme bearing frame, the ball screw is vice including lead screw and nut seat, the lead screw is established in the nut seat, install in the upper end bearing frame the upper end of lead screw, install in the lower extreme bearing frame the lower extreme of lead screw.
In the above scheme, the upper end of the lead screw comprises an upper end bearing mounting step, an upper end bearing mounting section and an upper end bearing retainer groove, the upper end bearing mounting step is provided with the upper end bearing mounting section, the upper end bearing mounting section is provided with the upper end bearing retainer groove, the upper end bearing mounting section is provided with the precision angular contact bearing, an inner ring at the lower end of the precision angular contact bearing is positioned and fixed by the upper end bearing mounting step, and the bottom of the upper end bearing seat is provided with an upper end positioning pin.
In the scheme, the bearing retainer ring is arranged in the groove of the bearing retainer ring at the upper end and is used for positioning and fixing the inner ring at the upper end of the precision angular contact ball bearing.
In the above scheme, the lower end of the lead screw comprises a lower end bearing mounting step, a lower end bearing mounting section and a thread section, wherein the lower end bearing mounting step is provided with the lower end bearing mounting section, the thread section is provided with the lower end bearing mounting section, the lower end bearing mounting section is provided with the high-precision angular contact thrust ball bearing, the lower end of the lower end bearing seat is fixed with a bearing seat cover plate, and the bottom of the lower end bearing seat is provided with a lower end positioning pin.
In the above scheme, a bearing seat flange is arranged on the lower end bearing seat, a sealing ring groove is arranged in the bearing seat flange, and a sealing ring is arranged in the sealing ring groove.
In the scheme, the locking nut is installed at the thread section, and the locking nut positions and fixes the high-precision angular contact thrust ball bearing through the washer.
In the scheme, the middle part of the lower end bearing seat is provided with the sealing end cover.
The utility model has the advantages and beneficial effects that: the utility model provides a convenient and practical's vice bearing structure of digit control machine tool stand lead screw. The screw pair supporting bearing of the scheme adopts the upper end precision angular contact ball bearing and the structure of the lower end high precision thrust angular contact ball bearing assembly, so that the bearing capacity of the screw pair is increased, and the service life of a machine tool can be effectively prolonged. The bearing adopts a mounting mode of fixing one end and free the other end, so that the phenomenon of rotation clamping stagnation of the bearing caused by the fact that the lead screw is heated and extended during processing can be effectively avoided; and the requirement on the machining precision of the size in the vertical direction is reduced, and the manufacturing cost is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic view of the present invention;
FIG. 2 is an enlarged schematic view of portion A;
fig. 3 is an enlarged schematic view of part B.
In the figure: 1. the device comprises a ball screw pair 11, a screw 12, a nut seat 101, an upper end bearing mounting step 102, an upper end bearing mounting section 103, an upper end bearing retainer groove 104, a lower end bearing mounting step 105, a lower end bearing mounting section 106, a thread section 2, an upper end bearing seat 3, a lower end bearing seat 4, a precision angular contact bearing 5, an upper end positioning pin 6, a bearing retainer 7, a high-precision thrust angular contact ball bearing 8, a bearing seat cover plate 9, a lower end positioning pin 10, a bearing seat flange 13, a sealing ring 14, a locking nut 15, a gasket 16 and a sealing end cover
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the utility model relates to a vice bearing structure of digit control machine tool stand screw, including ball screw pair 1, upper end bearing frame 2 and lower end bearing frame 3, 1 upper ends of ball screw pair are equipped with upper end bearing frame 2, 1 lower extreme of ball screw pair is equipped with lower end bearing frame 3, ball screw pair 1 includes lead screw 11 and nut seat 12, lead screw 11 is established in nut seat 12, install in upper end bearing frame 2 the upper end of lead screw 11, install in lower end bearing frame 3 the lower extreme of lead screw 11, lead screw 11's rotation can convert nut seat 12 along lead screw 11's linear motion into.
As shown in fig. 2, the upper end of the lead screw includes an upper end bearing mounting step 101, an upper end bearing mounting section 102 and an upper end bearing retainer groove 103, the upper end bearing mounting step 101 is provided with the upper end bearing mounting section 102, the upper end bearing mounting section 102 is provided with the upper end bearing retainer groove 103, the upper end bearing mounting section 102 is provided with the precision angular contact bearing 4, the inner ring at the lower end of the precision angular contact bearing 4 is positioned and fixed by the upper end bearing mounting step 101, and the bottom of the upper end bearing seat 2 is provided with an upper end positioning pin 5. And a bearing retainer ring 6 is arranged in the upper end bearing retainer ring groove 103 and is used for positioning and fixing the inner ring at the upper end of the precision angular contact ball bearing 4.
As shown in fig. 3, the lower end of the screw rod includes a lower end bearing mounting step 104, a lower end bearing mounting section 105, and a threaded section 106, the lower end bearing mounting step 104 is provided with the lower end bearing mounting section 105, the threaded section 106 is provided below the lower end bearing mounting section 105, and the lower end bearing mounting section 105 is provided with the high-precision angular contact thrust ball bearing 7, in this example, 3 high-precision angular contact thrust ball bearings 7 are adopted and are sequentially mounted from top to bottom; a bearing seat cover plate 8 is fixed at the lower end of the lower end bearing seat 3, and a lower end positioning pin 9 is installed at the bottom of the lower end bearing seat 3. A bearing seat flange 10 is fixed on the lower end bearing seat 3, a sealing ring groove is arranged in the bearing seat flange 10, and a sealing ring 13 is arranged in the sealing ring groove. And a locking nut 14 is arranged at the threaded section 106, and the locking nut 14 positions and fixes the high-precision angular contact thrust ball bearing 7 through a washer 15. The middle part of the lower end bearing seat 3 is provided with a sealing end cover 16.
Function of the ball screw pair 1: the main part of the transmission mechanism of the upright post converts the rotary motion of the servo motor into linear motion, thereby realizing the motion of the spindle box in the Y-axis direction.
Function of the upper end bearing block 2: supporting a precise angular contact bearing to ensure the rotation precision of the bearing;
the lower bearing pedestal 3 functions as follows: supporting a high-precision angular contact thrust ball bearing assembly, and ensuring the rotation precision of a bearing assembly;
function of the precision angular contact bearing 4: the upper end of the ball screw pair is supported, and various acting forces transmitted by the upright post, the main spindle box and the like are borne, so that the friction of the screw during rotation is reduced, and the rotation precision of the screw is ensured;
function of the upper end positioning pin 5: the positioning device is used for positioning the upper end bearing block during installation, and ensures the position precision of the upper end bearing block in the repeated dismounting process;
function of the bearing retainer 6: and fixing the upper bearing inner ring of the precision angular contact bearing.
The high-precision angular contact thrust ball bearing 7 has the following functions: the upper end of the ball screw pair is supported, and various acting forces transmitted by the upright post, the main spindle box and the like are borne, so that the friction of the screw during rotation is reduced, and the rotation precision of the screw is ensured;
function of the bearing seat cover plate 8: the interior of the bearing seat at the lower end is protected, and scrap iron, cutting fluid and the like are prevented from entering;
the lock lower end positioning pin 9 functions: the positioning device is used for positioning the lower end bearing block during installation, and ensures the position precision of the lower end bearing block in the repeated dismounting process;
function of the bearing seat flange 10: positioning the outer ring of the uppermost high-precision angular contact thrust ball bearing;
function of the seal ring 13: the entering of dust and the like is prevented, so that the precision of the high-precision angular contact thrust ball bearing is influenced;
the function of the tightening nut 14 is: the high-precision angular contact thrust ball bearing assembly is kept fixed, and a certain pre-tightening force is applied to the bearing assembly;
the function of the washer 15: positioning the inner ring of the lowermost high-precision angular contact thrust ball bearing;
the role of the sealing end cap 16 is: the precision of the high-precision angular contact thrust ball bearing is prevented from being influenced by the entering of dust and the like.
Mounting a precision angular contact ball bearing on a bearing mounting section of a lead screw part at the upper end of a ball screw pair, positioning and fixing an inner ring at the lower part of a bearing by a bearing mounting step, and positioning and fixing an inner ring at the upper part of the bearing by a bearing retainer ring; and (3) the upper end part of the screw rod part of the ball screw pair is installed into an installation hole of an upper end bearing seat together with the fixed bearing.
Installing a sealing ring into a sealing ring groove of a bearing seat flange; and then a bearing group consisting of a bearing seat flange and 3 high-precision angular contact thrust ball bearings, a gasket and a lock nut are sequentially arranged on the part of the screw rod at the lower end of the ball screw pair, the lock nut applies a certain pretightening force to the bearing group through the gasket, and the gasket positions and fixes the inner ring of the lowest bearing. The lower end of the screw rod part of the ball screw pair is installed into an installation hole of a lower end bearing block together with a fixed bearing group; and then fixing the bearing seat flange, the sealing end cover and the bearing seat cover plate on the lower end bearing seat in sequence.
After the ball screw pair meets the precision requirement through correction, the upper end nut seat and the lower end nut seat are fixed on the stand column, and the nut seats are respectively positioned by the upper end positioning pin and the lower end positioning pin, so that the mounting of the ball screw pair supporting assembly is completed. The rotation of the servo motor can be transmitted to the screw part of the ball screw pair by using the belt wheel assembly or the coupling as a medium, and if the main spindle box and the like are connected to the nut seat of the ball screw pair, the linear motion of the main spindle box in the Y-axis direction can be realized.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a vice bearing structure of digit control machine tool stand lead screw which characterized in that, includes ball screw pair, upper end bearing frame and lower extreme bearing frame, the vice upper end of ball screw is equipped with the upper end bearing frame, the vice lower extreme of ball screw is equipped with the lower extreme bearing frame, the ball screw is vice including lead screw and nut seat, the lead screw is established in the nut seat, install in the upper end bearing frame the upper end of lead screw, the lower extreme of lead screw is installed in the lower extreme bearing frame.
2. The upright post screw pair supporting structure for the numerical control machine tool according to claim 1, wherein the upper end of the screw comprises an upper end bearing mounting step, an upper end bearing mounting section and an upper end bearing retainer groove, the upper end bearing mounting step is provided with the upper end bearing mounting section, the upper end bearing mounting section is provided with the upper end bearing retainer groove, the upper end bearing mounting section is provided with a precision angular contact bearing, the inner ring at the lower end of the precision angular contact bearing is positioned and fixed by the upper end bearing mounting step, and the bottom of the upper end bearing seat is provided with an upper end positioning pin.
3. The upright screw pair supporting structure of the numerical control machine tool as claimed in claim 2, wherein a bearing retainer ring is arranged in the groove of the bearing retainer ring at the upper end, and is used for positioning and fixing the inner ring at the upper end of the precision angular contact ball bearing.
4. The upright post screw pair supporting structure of a numerical control machine tool as claimed in claim 1, wherein the lower end of the screw rod comprises a lower end bearing mounting step, a lower end bearing mounting section and a screw thread section, the lower end bearing mounting step is provided with the lower end bearing mounting section, the lower end bearing mounting section is provided with the screw thread section, the lower end bearing mounting section is provided with a high-precision angular contact thrust ball bearing, the lower end of the lower end bearing seat is fixed with a bearing seat cover plate, and the bottom of the lower end bearing seat is provided with a lower end positioning pin.
5. The upright post screw pair supporting structure of a numerical control machine tool as claimed in claim 4, wherein a bearing seat flange is arranged on the lower end bearing seat, a sealing ring groove is arranged in the bearing seat flange, and a sealing ring is arranged in the sealing ring groove.
6. The upright screw pair supporting structure of the numerical control machine tool as claimed in claim 4, wherein a locking nut is mounted at the threaded section, and the locking nut positions and fixes the high-precision angular contact thrust ball bearing through a washer.
7. The upright screw pair supporting structure of the numerical control machine tool as claimed in claim 4, wherein a sealing end cover is installed in the middle of the lower end bearing seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220147128.0U CN217344461U (en) | 2022-01-19 | 2022-01-19 | Numerical control machine tool upright post screw pair supporting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220147128.0U CN217344461U (en) | 2022-01-19 | 2022-01-19 | Numerical control machine tool upright post screw pair supporting structure |
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| CN217344461U true CN217344461U (en) | 2022-09-02 |
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| CN202220147128.0U Active CN217344461U (en) | 2022-01-19 | 2022-01-19 | Numerical control machine tool upright post screw pair supporting structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114290085A (en) * | 2022-01-19 | 2022-04-08 | 帕马(上海)机床有限公司 | A support structure for a column screw pair of a CNC machine tool |
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- 2022-01-19 CN CN202220147128.0U patent/CN217344461U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114290085A (en) * | 2022-01-19 | 2022-04-08 | 帕马(上海)机床有限公司 | A support structure for a column screw pair of a CNC machine tool |
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