CN211175256U

CN211175256U - Screw rod assembly structure

Info

Publication number: CN211175256U
Application number: CN201921066674.6U
Authority: CN
Inventors: 廖艺龙; 朱家坤; 林承纬
Original assignee: Shenzhen Jiujiuben Automation Equipment Co ltd
Current assignee: Shenzhen Jiujiuben Automation Equipment Co ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-08-04
Anticipated expiration: 2029-07-09

Abstract

The utility model discloses a lead screw subassembly structure, it includes: the bearing comprises a bearing seat, a bearing arranged in the bearing seat, a screw rod penetrating through the bearing, a gland and a check ring, wherein the gland and the check ring are sleeved on the screw rod and used for limiting the bearing in the bearing seat; the lead screw is sleeved with a first lantern ring and a second lantern ring which can slide and contact with two sides of the bearing, the gland and the retainer ring are respectively sleeved on the peripheries of the first lantern ring and the second lantern ring, the lead screw is further spirally provided with a first precision nut and a second precision nut, and the first precision nut and the second precision nut are respectively positioned on two sides of the first lantern ring and the second lantern ring, so that the first lantern ring and the second lantern ring are pushed to slide by adjusting the positions of the first precision nut and the second precision nut relative to the lead screw so as to adjust the contact position of the lead screw and the bearing, the pre-stretching of the lead screw is enhanced, the axial gap can be eliminated through the pre-stretching, the rigidity of the lead screw pair is increased, the elastic deformation between the bearing and the lead screw is reduced, the higher precision is achieved, and the fault tolerance is increased.

Description

Screw rod assembly structure

The technical field is as follows:

the utility model relates to a lead screw subassembly structure.

Background art:

the screw rod is an ideal product for converting rotary motion into linear motion or converting linear motion into rotary motion.

The screw is the most commonly used transmission element on tool machinery and precision machinery, and its main function is to convert rotary motion into linear motion or convert torque into axial repeated acting force, and has the characteristics of high precision, reversibility and high efficiency. The lead screw is widely used in various industrial equipments and precision instruments due to its small frictional resistance.

At present, the lead screw assembly on the market adopts the fixed mounting mode mostly, and such mounting mode makes the lead screw be fixed unadjustable with the bearing contact point, can make the lead screw with producing the clearance between the bearing, leads to letting the bearing not hard up easily, and the produced pretension effect is not very good like this, and the installation makes the life of bearing shorten like this simultaneously to the precision that influences the lead screw follows the lathe precision. Because the contact point between the screw and the bearing is fixed and can not be adjusted, the mounting precision and the processing precision of the screw are required to be very high, and the cost is increased.

In view of the above, the present inventors propose the following.

The utility model has the following contents:

an object of the utility model is to overcome prior art not enough, provide a lead screw subassembly structure.

In order to solve the technical problem, the utility model discloses a following technical scheme: this lead screw subassembly structure includes: the bearing comprises a bearing seat, a bearing arranged in the bearing seat, a screw rod penetrating through the bearing, a gland and a check ring, wherein the gland and the check ring are sleeved on the screw rod and used for limiting the bearing in the bearing seat; the utility model discloses a bearing, including the lead screw, the lead screw is last to be equipped with the first lantern ring and the second lantern ring that slidable and contact with this bearing both sides, gland and retaining ring are located this first lantern ring and second lantern ring periphery respectively to the cover, and still spiral installation has first accurate nut and the accurate nut of second on this lead screw, and this first accurate nut and the accurate nut of second are located this first lantern ring and second lantern ring both sides respectively to it promotes the contact position of first lantern ring and second lantern ring slip with adjustment lead screw and bearing to drive through the position of the relative lead screw of the accurate nut of regulation first accurate nut and second.

Further, in the above technical solution, an installation cavity for assembling the bearing is formed in the bearing seat; a convex part is formed on the side edge of the gland, extends into the mounting cavity and is in contact with the bearing.

Further, in the above technical solution, the number of the bearings is two, and the bearings are tightly attached together.

Further, in the above technical solution, one side of the first collar protrudes out of the side surface of the gland and contacts with the first precision nut.

Further, in the above technical solution, one side of the second collar protrudes out of the side surface of the retainer ring and contacts with the second precision nut.

Further, in the above technical solution, a window is disposed on the bearing seat, and the second precision nut is exposed at the window; the first precision nut is exposed at the outer side of the bearing seat.

Further, in the above technical solution, a plurality of axial grooves are respectively arranged outside the first precision nut and the second precision nut.

Further, in the above technical solution, a gap is formed between the inner wall of the gland and the periphery of the first collar.

Further, in the above technical solution, a gap is formed between the inner wall of the retaining ring and the periphery of the second collar.

Furthermore, in the above technical scheme, the bearing seat is locked with the gland and the retainer ring through screws.

After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: the utility model discloses an adjust the position of the relative lead screw of first accurate nut and the relative lead screw of second accurate nut and promote first lantern ring and second lantern ring and slide, with the position of the relative lead screw of adjustment bearing, reach the purpose of the contact position of adjustment lead screw and bearing, the pretension of lead screw has been strengthened to such mounting means, can eliminate the axial clearance through pretension, increase the rigidity of lead screw pair, reduce the bearing, elastic deformation between the lead screw, reach higher precision, simultaneously because the lead screw can be adjusted with the bearing contact point, require lead screw installation accuracy and lead screw machining precision to reduce relatively, thereby reduce cost; also increased the fault-tolerant rate simultaneously, even there is the harmfulness of other work pieces when making the lead screw installation, the utility model discloses can also keep good operating condition, the order the utility model discloses extremely strong market competition has.

Description of the drawings:

fig. 1 is a perspective view of the present invention;

fig. 2 is a perspective view of another perspective of the present invention;

fig. 3 is a cross-sectional view of the present invention;

fig. 4 is an exploded perspective view of the present invention.

The specific implementation mode is as follows:

the present invention will be further described with reference to the following specific embodiments and accompanying drawings.

As shown in fig. 1-4, a screw assembly structure is provided, which includes: the bearing comprises a bearing seat 1, a bearing 2 arranged in the bearing seat 1, a screw rod 3 arranged in the bearing 2 in a penetrating way, a gland 4 sleeved on the screw rod 3 and used for limiting the bearing 2 in the bearing seat 1 and a retainer ring 5; the screw rod 3 is sleeved with a first collar 6 and a second collar 7 which can slide and contact with two sides of the bearing 2, the gland 4 and the retainer ring 5 mainly limit the moving stroke of the bearing 2 in the bearing seat 1, and the first collar 6 and the second collar 7 respectively contact with two sides of the bearing 2, so that the bearing 2 is positioned in the bearing seat 1 and cannot move. The gland 4 and the retainer ring 5 are respectively sleeved on the peripheries of the first lantern ring 6 and the second lantern ring 7, a first precise nut 8 and a second precise nut 9 are further spirally mounted on the screw rod 3, and the first precise nut 8 and the second precise nut 9 are respectively positioned on two sides of the first lantern ring 6 and the second lantern ring 7, so that the first lantern ring 6 and the second lantern ring 7 are pushed to slide to adjust the contact position of the screw rod and the bearing by adjusting the positions of the first precise nut 8 and the second precise nut 9 relative to the screw rod 3. When the utility model is installed, the second precise nut 9, the second sleeve ring 7, the retainer ring 5, the bearing 2 and the first sleeve ring 6 are sequentially installed on the screw rod 3, the gland 4 and the first precise nut 8 are arranged in the bearing seat 1, at the moment, the first sleeve ring 6 and the second sleeve ring 7 are respectively contacted with the two sides of the bearing 2, so that the bearing 2 is positioned in the bearing seat 1, the first precise nut 8 and the second precise nut 9 are both fixed on the screw rod 3 in a spiral way and are respectively positioned at the two sides of the first sleeve ring 6 and the second sleeve ring 7, so as to force the first sleeve ring 6 and the second sleeve ring 7 to respectively closely contact with the two sides of the bearing 2, thereby ensuring that the bearing 2 is stably installed on the bearing seat 1 and stably sleeved on the screw rod 3, and further pushing the first sleeve ring 6 and the second sleeve ring 7 to slide by adjusting the positions of the first precise nut 8 and the second precise nut 9 relative to the screw rod 3, the installation mode enhances the pretension of the lead screw, axial clearance can be eliminated through the pretension, the rigidity of the lead screw pair is increased, the elastic deformation between the bearing and the lead screw is reduced, higher precision is achieved, and meanwhile, as the contact point of the lead screw and the bearing can be adjusted, the required lead screw installation precision and the lead screw processing precision are relatively reduced, so that the cost is reduced; also increased the fault-tolerant rate simultaneously, even there is the harmfulness of other work pieces when making the lead screw installation, the utility model discloses can also keep good operating condition, the order the utility model discloses extremely strong market competition has.

The bearing seat 1 is mounted on a machine base 10.

An installation cavity for assembling the bearing 2 is formed in the bearing seat 1; the side of the gland 4 is formed with a protrusion 41, and the protrusion 41 extends into the mounting cavity and contacts the bearing 2.

The number of the bearings 2 is two, and the bearings are tightly attached together, so that the stability and the precision of the operation of the screw rod are ensured.

One side of the first collar 6 protrudes out of the side of the gland 4 and is in contact with a first precision nut 8; one side of the second sleeve ring 7 protrudes out of the side of the retainer ring 5 and is in contact with a second precision nut 9; the positions of the first collar 6 and the second collar 7 are thereby adjusted by screwing the first precision nut 8 and the second precision nut 9.

A window 11 is arranged on the bearing seat 1, and the second precision nut 9 is exposed out of the window 11; the first precision nut 8 is exposed outside the bearing block 1.

The first precision nut 8 and the second precision nut 9 are externally provided with a plurality of axial grooves so as to drive the first precision nut 8 and the second precision nut 9 to rotate.

A gap is formed between the inner wall of the gland 4 and the periphery of the first collar 6, and a gap is formed between the inner wall of the retainer ring 5 and the periphery of the second collar 7, so that the first collar 6 and the second collar 7 are not obstructed by the gland 4 and the retainer ring 5 when moving.

And the bearing seat 1, the gland 4 and the retainer ring 5 are locked by screws.

To sum up, the utility model discloses an adjust the position of the relative lead screw 3 of first accurate nut 8 and second accurate nut 9 and promote first lantern ring 6 and second lantern ring 7 and slide to the position of the relative lead screw of adjustment bearing, reach the purpose of the contact position of adjustment lead screw and bearing, the pretension of lead screw has been strengthened to such mounting means, can eliminate the axial clearance through pretension, increase the rigidity of lead screw pair, reduce the bearing, the elastic deformation between the lead screw, reach higher precision, simultaneously because the lead screw can be adjusted with the bearing contact point, require lead screw installation precision and lead screw machining precision to reduce relatively, thereby reduce cost; also increased the fault-tolerant rate simultaneously, even there is the harmfulness of other work pieces when making the lead screw installation, the utility model discloses can also keep good operating condition, the order the utility model discloses extremely strong market competition has.

Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.

Claims

1. A screw assembly structure, comprising: the bearing comprises a bearing seat (1), a bearing (2) arranged in the bearing seat (1), a screw rod (3) arranged in the bearing (2) in a penetrating mode, a gland (4) sleeved on the screw rod (3) and used for limiting the bearing (2) in the bearing seat (1) and a retainer ring (5); the method is characterized in that:

the lead screw is characterized in that a first lantern ring (6) and a second lantern ring (7) which can slide and are in contact with the two sides of the bearing (2) are sleeved on the lead screw (3), a gland (4) and a retainer ring (5) are respectively sleeved on the peripheries of the first lantern ring (6) and the second lantern ring (7), a first precise nut (8) and a second precise nut (9) are further spirally mounted on the lead screw (3), and the first precise nut (8) and the second precise nut (9) are respectively located on the two sides of the first lantern ring (6) and the two sides of the second lantern ring (7), so that the position of the first precise nut (8) and the second precise nut (9) relative to the lead screw (3) is adjusted to push the first lantern ring (6) and the second lantern ring (7) to slide so as to adjust the contact position of the lead screw and the bearing.

2. A screw assembly structure as claimed in claim 1, wherein: an installation cavity for assembling the bearing (2) is formed in the bearing seat (1); a convex part (41) is formed on the side edge of the gland (4), and the convex part (41) extends into the mounting cavity and is in contact with the bearing (2).

3. A screw assembly structure as claimed in claim 1, wherein: the number of the bearings (2) is two, and the bearings are tightly attached together.

4. A screw assembly structure as claimed in claim 1, wherein: one side of the first lantern ring (6) protrudes out of the side of the gland (4) and is in contact with the first precision nut (8).

5. The screw assembly structure of claim 4, wherein: one side of the second lantern ring (7) protrudes out of the side face of the retainer ring (5) and is in contact with a second precision nut (9).

6. A screw assembly structure according to any one of claims 1 to 5, wherein: a window (11) is arranged on the bearing seat (1), and the second precision nut (9) is exposed out of the window (11); the first precision nut (8) is exposed to the outer side of the bearing seat (1).

7. The screw assembly structure of claim 6, wherein: and a plurality of axial grooves are formed in the outer parts of the first precision nut (8) and the second precision nut (9).

8. The screw assembly structure of claim 6, wherein: a gap is formed between the inner wall of the gland (4) and the periphery of the first lantern ring (6).

9. A screw assembly structure as claimed in claim 8, wherein: a gap is formed between the inner wall of the retainer ring (5) and the periphery of the second lantern ring (7).

10. The screw assembly structure of claim 6, wherein: the bearing seat (1) is locked with the gland (4) and the retainer ring (5) through screws.