CN212251010U - Non-contact limiting buffer device - Google Patents
Non-contact limiting buffer device Download PDFInfo
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- CN212251010U CN212251010U CN202020716752.9U CN202020716752U CN212251010U CN 212251010 U CN212251010 U CN 212251010U CN 202020716752 U CN202020716752 U CN 202020716752U CN 212251010 U CN212251010 U CN 212251010U
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- nut
- limiting
- permanent magnet
- buffering
- assembly
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Abstract
The utility model provides a spacing buffer of non-contact, include: the nut assembly (1), the screw rod (2) and the buffering and limiting assembly (3); the nut component (1) is in screw transmission on the lead screw (2), and the buffering and limiting component (3) is arranged at the end part of the lead screw (2); wherein the nut assembly (1) comprises: a nut permanent magnet (1-1) and a nut (1-3); the buffering and limiting assembly (3) comprises: a limiting shell (3-1), a limiting block (3-2) and a limiting permanent magnet (3-4); the limiting shell (3-1), the limiting block (3-2) and the limiting permanent magnet (3-4) are sleeved from outside to inside in sequence; one end, facing the buffering and limiting component (3), of a nut (1-3) in the nut component (1) is provided with the nut permanent magnet (1-1). Because the same magnetic pole repulsion principle is adopted for limiting, vibration and noise caused by collision contact are avoided.
Description
Technical Field
The utility model belongs to the technical field of stop device, concretely relates to spacing buffer of non-contact.
Background
The limiting buffer device is widely applied to preventing the screw pair from being separated from the screw pair due to overlarge extending/retracting stroke of the screw pair in the transmission working process of the screw pair.
In the transmission and operation process of the screw pair, the conventional stroke limit modes are mainly contact, and two types are commonly used, namely torsion limit and axial limit. The structure of the torsion limiting device is that a limiting boss is arranged on a limiter, the limiter bears impact torque, and the design difficulty of a tail end buffer structure is high; the axial is spacing, and its structure is comparatively complicated, bears the axial force, and the relative sliding friction between stopper and the nut easily causes "the wedge phenomenon" in spacing the twinkling of an eye.
No matter which kind of spacing mode of adoption, when the nut in the screw pair moved to the stroke end, often can directly strike the stopper, owing to be the rigid contact, can lead to the life-span reduction of relevant part on the one hand, on the other hand also can bring great impact and vibrations. Therefore, the buffering effect of the limiting device of the screw pair in the prior art is not ideal.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the non-contact limiting buffer device solves the problem that a limiting device of a lead screw pair in the prior art is not ideal in buffering effect.
The utility model discloses a scheme:
the utility model provides a spacing buffer of non-contact, include: the nut component 1, the lead screw 2 and the buffering and limiting component 3; the nut component 1 is in screw transmission on the lead screw 2, and the buffering and limiting component 3 is arranged at the end part of the lead screw 2; wherein the content of the first and second substances,
the nut component 1 includes: a nut permanent magnet 1-1 and a nut 1-3; the buffering and limiting assembly 3 comprises: a limiting shell 3-1, a limiting block 3-2 and a limiting permanent magnet 3-4; the limiting shell 3-1, the limiting block 3-2 and the limiting permanent magnet 3-4 are sequentially sleeved from outside to inside;
one end, facing the buffering and limiting component 3, of the nut 1-3 in the nut component 1 is provided with the nut permanent magnet 1-1.
Optionally, the nut component 1 further includes: an elastic element I1-2; the buffering and limiting assembly 3 further comprises: elastic elements II 3-3;
the nut permanent magnet 1-1 and the elastic element I1-2 are sleeved in the nut 1-3, and the elastic element I1-2 is far away from the buffering limiting component 3;
the elastic element II 3-3 is sleeved in the limiting block 3-2, and the elastic element II 3-3 is far away from the nut component 1.
Optionally, the nut 1-3 is connected with the nut permanent magnet 1-1 through a key way, and the nut permanent magnet 1-1 is in screw transmission on the screw rod 2 along with the nut 1-3.
Optionally, the limiting block 3-2 is connected with the limiting permanent magnet 3-4 through a key groove.
Optionally, the buffering and limiting assembly 3 further includes: 3-5 of a sliding bush;
the sliding bush 3-5 is sleeved on the elastic element II 3-3, the limiting permanent magnet 3-4 and the screw rod 2.
Optionally, the buffering and limiting assembly 3 further includes: 3-6 of a lock pin;
the lock pin 3-6 penetrates through the limiting shell 3-1, the limiting block 3-2 and the screw rod 2.
Optionally, the nut component 1 further includes: 1-4 parts of a locking piece;
the locking piece 1-4 is used for connecting the nut permanent magnet 1-1 and the nut 1-3.
The utility model has the advantages that:
the non-contact limiting buffer device provided by the utility model has novel design and compact structure; the work is stable and reliable; the installation is convenient, and the maneuverability is good. Compared with the traditional structure, the technology is a non-contact structure, the limit is carried out by adopting the principle that the same magnetic poles repel, the design is novel, the limit has elasticity due to the action of the elastic element, the axial impact is relieved, and the vibration and the noise caused by collision contact are avoided. Its outstanding advantages can bring huge economic and social benefits.
Drawings
Fig. 1 is a schematic structural diagram of a non-contact limiting and buffering device according to an embodiment of the present invention;
fig. 2 is an exploded view of a non-contact type position limiting buffer device according to an embodiment of the present invention;
fig. 3 is a front view partially cross-sectional view of a non-contact type limiting buffer device according to an embodiment of the present invention;
fig. 4 is a partial schematic view of a non-contact type limiting buffer device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a nut according to an embodiment of the present invention;
description of reference numerals:
1-a nut assembly; 2-a lead screw; 3, buffering and limiting components;
1-nut permanent magnet; 1-2-elastic element i; 1-3-a nut;
1-4-a locking member; 3-1-a limit housing; 3-2-a limiting block;
3-elastic element ii; 3-4-spacing permanent magnet; 3-5-sliding bush;
3-6-locking pin.
Detailed Description
The non-contact limiting and buffering device provided by the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments:
fig. 1 is a schematic structural view of a non-contact limiting buffer device provided by an embodiment of the present invention, and fig. 2 is an exploded view of the non-contact limiting buffer device provided by an embodiment of the present invention, as shown in fig. 1 and 2, the present invention provides a non-contact limiting buffer device.
The following drawings take a non-contact limiting buffer device of a ball screw pair as an example for reference. The designer can design the magnetic force and the elastic range according to different requirements.
Spacing buffer of non-contact includes: the nut assembly comprises a nut assembly 1, a lead screw 2 and a buffering and limiting assembly 3, wherein the nut assembly 1 consists of a nut 1-3, an elastic element I1-2, a nut permanent magnet 1-1 and a locking piece 1-4; the buffering and limiting assembly 3 comprises a limiting permanent magnet 3-4, a sliding bush 3-5, an elastic element II 3-3, a limiting block 3-2, a limiting shell 3-1 and a lock pin 3-6.
Fig. 5 is a schematic structural diagram of a nut according to an embodiment of the present invention, as shown in fig. 1 and fig. 2, in a transmission process of a ball screw assembly, a nut assembly 1 moves axially along a screw 2, when the nut assembly 1 moves to a position near a buffering limiting assembly 3, a nut permanent magnet 1-1 installed in a nut 1-3 (a schematic part diagram is shown in fig. 5) and a limiting permanent magnet 3-3 installed in the buffering limiting assembly 3 use the principle that like poles of permanent magnets repel each other, and a non-contact limiting function functions.
Fig. 3 is a partial sectional view of a non-contact type limiting buffer device according to an embodiment of the present invention, as shown in fig. 2 and fig. 3, in order to achieve a stable limiting effect, a certain impact buffering function is required to be configured, when the nut rotation speed is gradually increased, an elastic element i 1-2 in a nut assembly 1 is compressed to absorb a part of axial impact, and the buffering effect is achieved first, when the nut rotation speed is higher, the compressed elastic element i 1-2 pushes a nut permanent magnet 1-1 to advance, at this time, a limiting permanent magnet 3-4 compresses an elastic element ii 3-3, and finally, the axial movement is stably limited by a limiting block 3-2, wherein the elastic element ii 3-3 is installed between the limiting permanent magnet 3-4 and the limiting block 3-2, and is fixed by a limiting shell 3-1 and a lock pin 3-6, the limiting permanent magnets 3-4 axially move at the end part of the lead screw 2 through the sliding bushings 3-5.
Fig. 4 is a schematic view of a non-contact type limiting and buffering device according to an embodiment of the present invention, as shown in fig. 4, a nut 1-3 is provided with a locking member 1-4, which is provided to adjust the installation position of the nut permanent magnet 1-1 according to the pretightening force of the elastic element i 1-2, and to prevent the nut permanent magnet 1-1 from being disengaged due to an excessive resilience of the elastic element i 1-2; meanwhile, in order to avoid harmful abrasion between the permanent magnet and the elastic element, two bosses (position I in figure 4) are arranged on the nut permanent magnet 1-1 in the circumferential direction to ensure that the nut permanent magnet rotates along with the nut 1-3 and moves axially; two bosses (4I in the figure) are arranged on the limiting permanent magnets 3-5 in the circumferential direction to limit the rotary motion and ensure the axial displacement of the permanent magnets.
In summary, when the nuts 1-3 are operated to the end of the stroke, the principle that like poles of the permanent magnets repel each other is utilized to generate acting force and reacting force, so that the direct impact between the acting force and the reacting force is avoided, and the aim of buffering is achieved by utilizing the action of the spring force.
The above-mentioned embodiments are intended to illustrate the present invention, but not to limit the present invention, and any modifications and changes made to the present invention are within the spirit of the present invention and the scope of the claims.
Claims (7)
1. A non-contact limit buffer device, comprising: the nut assembly (1), the screw rod (2) and the buffering and limiting assembly (3); the nut component (1) is in screw transmission on the lead screw (2), and the buffering and limiting component (3) is arranged at the end part of the lead screw (2); wherein the content of the first and second substances,
the nut assembly (1) comprises: a nut permanent magnet (1-1) and a nut (1-3); the buffering and limiting assembly (3) comprises: a limiting shell (3-1), a limiting block (3-2) and a limiting permanent magnet (3-4); the limiting shell (3-1), the limiting block (3-2) and the limiting permanent magnet (3-4) are sleeved from outside to inside in sequence;
one end, facing the buffering and limiting component (3), of a nut (1-3) in the nut component (1) is provided with the nut permanent magnet (1-1).
2. The non-contact spacing cushioning device according to claim 1, characterized in that said nut assembly (1) further comprises: an elastic element I (1-2); the buffering and limiting assembly (3) further comprises: an elastic element II (3-3);
the nut permanent magnet (1-1) and the elastic element I (1-2) are sleeved in the nut (1-3), and the elastic element I (1-2) is far away from the buffering and limiting component (3);
the elastic element II (3-3) is sleeved in the limiting block (3-2), and the elastic element II (3-3) is far away from the nut component (1).
3. The non-contact limit buffer device according to claim 2, wherein the nut (1-3) is in keyway connection with the nut permanent magnet (1-1), and the nut permanent magnet (1-1) is in screw transmission with the nut (1-3) on the screw rod (2).
4. The non-contact limit buffer device according to claim 3, wherein the limit block (3-2) and the limit permanent magnet (3-4) are in keyway connection.
5. The non-contact spacing buffer device according to claim 4, characterized in that said spacing buffer assembly (3) further comprises: a sliding bush (3-5);
the sliding bush (3-5) is sleeved on the elastic element II (3-3), the limiting permanent magnet (3-4) and the lead screw (2).
6. The non-contact spacing buffer device according to claim 5, characterized in that said spacing buffer assembly (3) further comprises: a lock pin (3-6);
the lock pin (3-6) penetrates through the limiting shell (3-1), the limiting block (3-2) and the lead screw (2) to be arranged.
7. The non-contacting spacing buffer according to claim 2, characterized in that said nut assembly (1) further comprises: a locking member (1-4);
the locking piece (1-4) is used for connecting the nut permanent magnet (1-1) and the nut (1-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020716752.9U CN212251010U (en) | 2020-04-30 | 2020-04-30 | Non-contact limiting buffer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020716752.9U CN212251010U (en) | 2020-04-30 | 2020-04-30 | Non-contact limiting buffer device |
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| Publication Number | Publication Date |
|---|---|
| CN212251010U true CN212251010U (en) | 2020-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020716752.9U Active CN212251010U (en) | 2020-04-30 | 2020-04-30 | Non-contact limiting buffer device |
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| CN (1) | CN212251010U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464617A (en) * | 2021-07-09 | 2021-10-01 | 中汽创智科技有限公司 | Buffer device |
| CN114802671A (en) * | 2022-04-28 | 2022-07-29 | 武汉理工大学 | Axial vibration reduction device and system for shaftless rim propeller |
-
2020
- 2020-04-30 CN CN202020716752.9U patent/CN212251010U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464617A (en) * | 2021-07-09 | 2021-10-01 | 中汽创智科技有限公司 | Buffer device |
| CN114802671A (en) * | 2022-04-28 | 2022-07-29 | 武汉理工大学 | Axial vibration reduction device and system for shaftless rim propeller |
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