CN218487840U - Large gantry ball screw supporting mechanism - Google Patents
Large gantry ball screw supporting mechanism Download PDFInfo
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- CN218487840U CN218487840U CN202122994406.4U CN202122994406U CN218487840U CN 218487840 U CN218487840 U CN 218487840U CN 202122994406 U CN202122994406 U CN 202122994406U CN 218487840 U CN218487840 U CN 218487840U
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- seat
- lead screw
- ball screw
- roller
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Abstract
The utility model provides a large-scale longmen ball screw rod supporting mechanism, relates to and supports apparatus technical field, including lead screw and threaded connection drive the seat above that, the below of lead screw is equipped with the supporting seat side by side, drives the groove of dodging of seting up the supporting seat on the seat, rotates side by side on the supporting seat and installs a plurality of groups support piece, and every group support piece includes that two are along the support that transversely sets up side by side change the roller, supports the axis of changeing the roller and the axis parallel arrangement of lead screw, and two support change the roller and offset with the lead screw friction. The utility model provides a device in the conventional art all be along its moving direction increase follow-up supporting component on removing the seat, this mode can only realize removing the lead screw of seat shift position department not in flagging state, but the lead screw section that is in removal seat both sides still is in flagging state, can't realize the stable support to the lead screw, has reduced work efficiency's problem.
Description
Technical Field
The utility model relates to a support apparatus technical field, concretely relates to large-scale longmen ball screw rod supporting mechanism.
Background
For machine tools with large stroke such as gantry machining centers and the like, screw transmission is used in large quantities at present, two ends of a screw are supported by a bearing and a bearing seat under common conditions, a nut is provided with a ball matched with a screw thread of a screw rod, the nut is connected with a moving part through a nut seat, and when a driving motor drives the screw rod to rotate, the screw thread can drive the nut to do reciprocating linear motion along the axis of the screw rod. Under the condition of long stroke of the ball screw, the screw nut does reciprocating linear motion along the axis of the ball screw, and a support bearing cannot be arranged in the middle. Due to the long and thin structure of the screw rod, the longer the screw rod is, the worse the rigidity is, and under the action of self-weight and rotational inertia force, the higher the bending deformation is, even the vibration is generated, the transmission precision and the service life of the ball screw rod can be seriously influenced when the ball screw rod works, and the inconvenience is brought to people when the ball screw rod is used. In order to apply the ball screw to a large stroke to improve the accuracy of the ball screw, the rigidity of the ball screw is generally increased by increasing the diameter of the ball screw, which not only increases the size of the structure, but also increases the cost, and the cost performance of the method is poor. A ball screw drive with auxiliary support is therefore proposed.
The technical scheme includes that the device comprises two linear guide rails which are parallel to a lead screw and are arranged below the lead screw, sliding blocks which can slide along the linear guide rails are respectively matched on the linear guide rails, two opposite ends of the linear guide rails are respectively fixed with a stop block which blocks the sliding blocks, a lead screw supporting part which supports the lead screw is fixed on the sliding block, a nut seat is fixed on a lead screw nut, a permanent magnet A is fixed on the nut seat, the nut seat is positioned between the two sliding blocks, a permanent magnet B is respectively fixed on the two sliding blocks, the different poles of the permanent magnet A and the different poles of the permanent magnet B are opposite when the nut seat moves to the position above the sliding blocks, and the magnetic force follow-up ball lead screw supporting device for the gantry machining center is simple in structure, free of rigid connection between the two supporting points and independent in operation, solves the problem of high-speed impact supported by the large-stroke lead screw, and meets the requirement of high-speed operation of a large-stroke machine tool.
The prior device gradually exposes the defects of the technology along with the use, and mainly shows the following aspects:
the existing device is a supporting component which is added with follow-up motion along the moving direction of the moving seat, the mode can only realize that a screw rod at the moving position of the moving seat is not in a drooping state, but screw rod sections at two sides of the moving seat are still in the drooping state, stable support of the screw rod cannot be realized, and the working efficiency is reduced.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides a large-scale longmen ball screw rod supporting mechanism for the device of solving among the conventional art all is along its moving direction increase follow-up supporting component on removing the seat, and this mode can only realize removing the lead screw of seat shift position department not in flagging state, but is still in flagging state in the lead screw section that removes the seat both sides, can't realize the stable support to the lead screw, has reduced work efficiency's problem.
In order to achieve the above object, the utility model provides a following technical scheme:
a large gantry ball screw supporting mechanism comprises a screw and a driving seat in threaded connection with the screw, wherein a supporting seat is arranged below the screw in parallel, an avoiding groove for avoiding the supporting seat is formed in the driving seat, a plurality of groups of supporting pieces are arranged on the supporting seat in parallel in a rotating mode, each group of supporting pieces comprises two supporting rotating rollers which are transversely arranged in parallel, the axes of the supporting rotating rollers and the axis of the screw are arranged in parallel, and the two supporting rotating rollers and the screw are in friction and abut against each other.
As an optimized scheme, the opposite inner walls of the avoidance groove are in sliding friction with the supporting seat through the guide piece.
As an optimized scheme, the guide piece includes along the moving direction rigid coupling of driving seat in guide rail on the supporting seat lateral wall, be equipped with the guide slot on the guide rail, keep away on the inner wall in groove the rigid coupling have retrain in the conducting strip in the guide slot.
As an optimized scheme, the supporting seat is fixedly arranged on the frame.
As an optimized scheme, an installation plate is fixedly connected to the side wall, close to the bottom, of the supporting seat, and the installation plate is fixed to the rack through fixing bolts.
As an optimized scheme, the supporting seat comprises a box shell, the upper end part of the box shell is provided with an opening, the supporting rotary roller is rotatably arranged inside the box shell, and the peripheral wall of the supporting rotary roller above the supporting rotary roller is higher than the opening of the box shell.
As an optimized scheme, two support rods are fixedly connected in the box shell in parallel corresponding to each support roller, and the end parts of the support rollers are rotatably arranged on the support rods.
As an optimized proposal, the opposite end surfaces of the supporting rotary rollers arranged on the box shell are also provided with V-shaped avoiding grooves communicated with the openings.
Compared with the prior art, the beneficial effects of the utility model are that:
through lieing in the supporting seat of lead screw below side by side, realized utilizing the supporting seat to be in support state to the lead screw all the time, can effectually overcome the lead screw because of the length overlength, lead to flagging phenomenon to take place to having seted up on the drive seat and having dodged the groove, realize that it can not obstruct it along the lead screw at the reciprocating motion in-process, the supporting seat has guaranteed the stability of removal in-process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of a side view state of the present invention.
In the figure: 1-a lead screw; 2-a driving seat; 3-avoidance groove; 4-a support seat; 5-supporting the roller; 6-V-shaped avoidance grooves; 7-a guide rail; 8-conducting bars; 9-mounting a plate; 10-a frame; 11-fixing the bolt.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only used as examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 and 2, the large gantry ball screw supporting mechanism comprises a screw rod 1 and a driving seat 2 connected to the screw rod by screw thread, a supporting seat 4 is arranged below the screw rod 1 in parallel, an avoiding groove 3 for avoiding the supporting seat 4 is formed in the driving seat 2, a plurality of groups of supporting pieces are installed on the supporting seat 4 in parallel in a rotating mode, each group of supporting pieces comprises two supporting rollers 5 which are arranged in parallel in the transverse direction, the axis of each supporting roller 5 is parallel to the axis of the screw rod 1, and the two supporting rollers 5 are in friction and offset with the screw rod 1.
The purpose of the supporting rollers 5 is to reduce the friction between the screw 1 and the support 4.
The opposite inner wall of the avoidance groove 3 is in sliding friction with the support seat 4 through a guide.
The guide piece comprises a guide rail 7 fixedly connected to the side wall of the supporting seat 4 along the moving direction of the driving seat 2, a guide groove is formed in the guide rail 7, and a guide strip 8 constrained in the guide groove is fixedly connected to the inner wall of the avoidance groove 3.
The supporting seat 4 is fixedly installed on the frame 10.
The side wall of the supporting seat 4 close to the bottom is fixedly connected with a mounting plate 9, and the mounting plate 9 is fixed on a rack 10 through a fixing bolt 11.
The supporting seat 4 comprises a box shell, an opening is formed in the upper end of the box shell, the supporting roller 5 rotates and is installed inside the box shell, and the peripheral wall of the supporting roller 5 above the supporting roller is higher than the opening of the box shell.
Two support rods are fixedly connected in the box shell in parallel corresponding to each support roller 5, and the end parts of the support rollers 5 are rotatably arranged on the support rods.
The opposite end surface of the box shell installation supporting roller 5 is also provided with a V-shaped avoiding groove 6 communicated with the opening.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (8)
1. The utility model provides a large-scale longmen ball screw rod supporting mechanism which characterized in that: including lead screw (1) and threaded connection drive seat (2) above that, the below of lead screw (1) is equipped with supporting seat (4) side by side, drive and seted up on seat (2) and dodge groove (3) of dodging of supporting seat (4), rotate side by side on supporting seat (4) and install a plurality of support piece of group, every group support piece includes that two supports along transversely setting up side by side change roller (5), support change the axis of roller (5) with the axis parallel arrangement of lead screw (1), two support change roller (5) with lead screw (1) friction offsets.
2. The large gantry ball screw support mechanism of claim 1, wherein: the relative inner wall of the avoiding groove (3) is in sliding friction with the supporting seat (4) through a guide piece.
3. The large gantry ball screw support mechanism of claim 2, wherein: the guide piece include along the moving direction rigid coupling of driving seat (2) in guide rail (7) on supporting seat (4) lateral wall, be equipped with the guide slot on guide rail (7), keep away on the inner wall in groove (3) the rigid coupling have retrain in gib (8) in the guide slot.
4. The large gantry ball screw support mechanism of claim 1, wherein: the supporting seat (4) is fixedly arranged on the frame (10).
5. The large gantry ball screw support mechanism of claim 4, wherein: the supporting seat (4) is fixedly connected with a mounting plate (9) on the side wall close to the bottom, and the mounting plate (9) is fixed on the rack (10) through a fixing bolt (11).
6. The large gantry ball screw support mechanism of claim 1, wherein: the supporting seat (4) comprises a box shell, an opening is formed in the upper end of the box shell, the supporting rotary roller (5) is rotatably installed inside the box shell, and the peripheral wall of the supporting rotary roller (5) above the supporting rotary roller is higher than the opening of the box shell.
7. The large gantry ball screw support mechanism of claim 6, wherein: the supporting and rotating roller box is characterized in that two supporting rods are fixedly connected in the box shell in parallel corresponding to each supporting and rotating roller (5), and the end parts of the supporting and rotating rollers (5) are rotatably arranged on the supporting rods.
8. The large gantry ball screw support mechanism of claim 7, wherein: and the opposite end surfaces of the box shell, which are provided with the supporting rotary rollers (5), are also provided with V-shaped avoiding grooves (6) communicated with the openings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122994406.4U CN218487840U (en) | 2021-12-01 | 2021-12-01 | Large gantry ball screw supporting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122994406.4U CN218487840U (en) | 2021-12-01 | 2021-12-01 | Large gantry ball screw supporting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218487840U true CN218487840U (en) | 2023-02-17 |
Family
ID=85183415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122994406.4U Active CN218487840U (en) | 2021-12-01 | 2021-12-01 | Large gantry ball screw supporting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218487840U (en) |
-
2021
- 2021-12-01 CN CN202122994406.4U patent/CN218487840U/en active Active
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