A screw nut transmission assembly with built-in mechanical damping

Abstract

The utility model relates to the technical field of transmission components, and in particular to a screw-nut transmission component with built-in mechanical damping. Its technical solution includes: a screw, a nut threadedly connected to the screw, characterized in that a bearing inner ring is installed at one end of the screw, the bearing inner ring is interference-fitted with the screw, a bearing outer ring is rotatably installed outside the bearing inner ring, a plurality of rolling bodies are rotatably installed between the bearing inner ring and the bearing outer ring, two damping plates are installed between the bearing inner ring and the bearing outer ring, and the damping plates are interference-fitted with the bearing inner ring and the bearing outer ring. The utility model is achieved by interference-fitting the damping plate with the bearing inner ring and the bearing outer ring. The damping plate ensures that the screw and the bearing inner ring can rotate under a certain torque. The damping plate is used to provide damping for the screw, and there is no need to specially develop a mechanical damping or electromagnetic damping device to meet the damping effect, and the cost of the damper is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission components, in particular to a screw nut transmission component with self-contained mechanical damping. Background Art

[0002] During the transmission process of the screw and nut, various factors (such as assembly error, processing accuracy, etc.) may cause unstable transmission, vibration and impact. Damping force can help absorb these vibrations and impacts, protect mechanism components, reduce noise, and extend the life of the equipment. Damping force can make the movement of the screw and nut smoother during high-speed movement or load changes, and avoid the mechanism from losing control due to sudden changes in speed or load. After stopping the movement, if there is no damping force, due to the gap and friction of the thread, the mechanism may have a small, unconscious sliding, that is, creeping phenomenon. Damping force can help eliminate or reduce this phenomenon and ensure the accuracy of positioning. Therefore, in the linear motion mechanism driven by the screw and nut, a certain damping force is often required during the transmission process.

[0003] The existing method of increasing damping requires the special development of mechanical damping or electromagnetic damping devices to meet the damping effect, and the individual damping devices are complex, unstable, and costly. Summary of the invention

[0004] The utility model aims to solve the problems existing in the background technology and to provide a stable and low-cost screw-nut transmission assembly with mechanical damping.

[0005] The technical solution of the utility model is: a screw-nut transmission assembly with built-in mechanical damping, comprising a screw and a nut threadedly connected to the screw, a bearing inner ring being installed at one end of the screw, the bearing inner ring being interference fit with the screw, a bearing outer ring being rotatably installed on the outer side of the bearing inner ring, a plurality of rolling bodies being rotatably installed between the bearing inner ring and the bearing outer ring, two damping plates being installed between the bearing inner ring and the bearing outer ring, the damping plates being interference fit with the bearing inner ring and the bearing outer ring.

[0006] Optionally, the rolling body may be a ball or a roller.

[0007] Optionally, a retaining ring is rotatably mounted on the plurality of rolling elements, and the retaining ring holds the rolling elements in a correct position so that the rolling elements can roll correctly between the inner ring of the bearing and the outer ring of the bearing.

[0008] Optionally, the damping plate is located on the upper and lower sides of the bearing inner ring and the bearing outer ring, and the damping plate is in a circular ring shape that fits the bearing inner ring and the bearing outer ring.

[0009] Optionally, the damping plate is made of a material with a certain elasticity, and the damping plate ensures that the screw rod and the inner ring of the bearing can rotate under a certain torque.

[0010] Optionally, the outer ring of the bearing inner ring is provided with a smooth first inner groove, and the rolling body is located inside the first inner groove.

[0011] Optionally, a smooth second inner groove is provided in the inner ring of the outer ring of the bearing, and the rolling element is located in the second inner groove.

[0012] Compared with the prior art, the utility model has the following beneficial technical effects:

[0013] Two damping plates are installed between the inner ring and the outer ring of the bearing, and the damping plates are interference fit with the inner ring and the outer ring of the bearing. The damping plates are made of a material with a certain elasticity, and the damping plates ensure that the screw and the inner ring of the bearing can rotate under a certain torque. The damping plates provide damping for the screw, and there is no need to specially develop mechanical damping or electromagnetic damping devices to meet the damping effect, and the cost of the damper is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural schematic diagram of an embodiment of the utility model is given;

[0015] Figure 2 A schematic diagram of the position of the rolling element of the utility model is given;

[0016] Figure 3 A structural schematic diagram of the bearing inner ring and the bearing outer ring of the utility model is given.

[0017] Figure numerals: 1, screw rod; 2, nut; 3, bearing inner ring; 301, first inner groove; 4, bearing outer ring; 401, second inner groove; 5, rolling element; 501, retaining ring; 6, damping plate. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Example

[0020] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0022] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0024] like Figure 1-3 As shown, the utility model proposes a screw nut transmission assembly with mechanical damping, comprising a screw 1, a nut 2 threadedly connected to the screw 1, a bearing inner ring 3 installed at one end of the screw 1, and the bearing inner ring 3 and the screw 1 are interference fit, which can prevent the bearing inner ring 3 and the screw 1 from slipping. A bearing outer ring 4 is rotatably installed on the outer side of the bearing inner ring 3, and a plurality of rolling bodies 5 are rotatably installed between the bearing inner ring 3 and the bearing outer ring 4. The rolling bodies 5 can be balls or rollers. A retaining ring 501 is rotatably installed on the plurality of rolling bodies 5, and the retaining ring 501 keeps the rolling bodies 5 in the correct position so that the rolling bodies 5 can roll correctly between the bearing inner ring 3 and the bearing outer ring 4. The retaining ring 501 can help disperse the load applied to the rolling bodies 5, which helps to improve the load-bearing capacity and service life of the damper. The design of the retaining ring 501 can guide the rolling bodies 5 to move smoothly between the bearing inner ring 3 and the bearing outer ring 4, which helps to reduce noise and vibration and improve the running stability of the damper. Under high-speed rotation or extreme load conditions, the rolling elements 5 may gather toward the axial center of the bearing inner ring 3 due to centrifugal force. The retaining ring 501 helps prevent this from happening and ensures that the damper works properly.

[0025] Two damping plates 6 are installed between the bearing inner ring 3 and the bearing outer ring 4, and the damping plates 6 are interference fit with the bearing inner ring 3 and the bearing outer ring 4. The damping plates 6 are located on the upper and lower sides of the bearing inner ring 3 and the bearing outer ring 4, and the damping plates 6 are annular and fit with the bearing inner ring 3 and the bearing outer ring 4. The damping plates 6 are made of a material with a certain elasticity, and the damping plates 6 ensure that the screw 1 and the bearing inner ring 3 can rotate under a certain torque.

[0026] The outer ring of the bearing inner ring 3 is provided with a smooth first inner groove 301, and the rolling body 5 is located inside the first inner groove 301. The inner ring of the bearing outer ring 4 is provided with a smooth second inner groove 401, and the rolling body 5 is located in the second inner groove 401. The first inner groove 301 and the second inner groove 401 ensure that the rolling body 5 can roll along a predetermined track during movement, thereby reducing friction and wear and improving the accuracy of the damper.

[0027] Working principle: when in use, fix the outer ring 4 of the bearing, then pull the nut 2, and under the action of the two damping plates 6 between the inner ring 3 and the outer ring 4 of the bearing, damping is provided for the screw rod 1, thereby achieving a motion effect with damping.

[0028] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A screw-nut transmission assembly with mechanical damping, comprising a screw (1) and a nut (2) threadedly connected to the screw (1), characterized in that: A bearing inner ring (3) is installed at one end of the screw rod (1), the bearing inner ring (3) and the screw rod (1) are interference fit, a bearing outer ring (4) is rotatably installed outside the bearing inner ring (3), a plurality of rolling bodies (5) are rotatably installed between the bearing inner ring (3) and the bearing outer ring (4), two damping plates (6) are installed between the bearing inner ring (3) and the bearing outer ring (4), and the damping plates (6) are interference fit with the bearing inner ring (3) and the bearing outer ring (4).

2. A screw-nut transmission assembly with mechanical damping according to claim 1, characterized in that: The rolling element (5) is any one of a ball and a roller.

3. A screw-nut transmission assembly with mechanical damping according to claim 1, characterized in that: A retaining ring (501) is rotatably mounted on the plurality of rolling bodies (5), and the retaining ring (501) retains the rolling bodies (5) in the correct position, so that the rolling bodies (5) can roll correctly between the bearing inner ring (3) and the bearing outer ring (4).

4. A screw-nut transmission assembly with mechanical damping according to claim 1, characterized in that: The damping plate (6) is located on the upper and lower sides of the bearing inner ring (3) and the bearing outer ring (4), and the damping plate (6) is in the shape of a ring that fits the bearing inner ring (3) and the bearing outer ring (4).

5. The screw-nut transmission assembly with self-contained mechanical damping according to claim 1, characterized in that: The damping plate (6) is made of a material with a certain elasticity, and the damping plate (6) ensures that the screw rod (1) and the bearing inner ring (3) can rotate under the influence of torsion.

6. A screw-nut transmission assembly with mechanical damping according to claim 1, characterized in that: The outer ring of the bearing inner ring (3) is provided with a smooth first inner groove (301), and the rolling body (5) is located inside the first inner groove (301).

7. A screw-nut transmission assembly with self-contained mechanical damping according to claim 1, characterized in that: A smooth second inner groove (401) is provided in the inner ring of the bearing outer ring (4), and the rolling body (5) is located in the second inner groove (401).

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