POM horizontal axis rubber ring assembly based on taper cooperation and pre-tightening adjustment

Abstract

The utility model discloses a POM horizontal shaft rubber ring assembly based on taper cooperation and pre -tightening adjustment, including inner rubber ring and outer rubber ring, the outer rubber ring is inserted in the horizontal shaft seat, the inner rubber ring sets up on one end of horizontal shaft, the inner rubber ring is also inserted in the outer rubber ring, the outer surface of inner rubber ring is shaped with second taper surface, the inner surface of outer rubber ring is shaped with first taper surface, the second taper surface is pasted on first taper surface, when horizontal shaft installation, the second taper surface of inner rubber ring moves along the first taper surface of outer rubber ring, the utility model discloses through the outer rubber ring sleeve and is connected on the outer surface of inner rubber ring, makes inner rubber ring after being subjected to the axial force of horizontal shaft, makes inner rubber ring along the taper direction and be pressed into the outer rubber ring, and the outer rubber ring keeps apart inner rubber ring, makes inner rubber ring not appear thermal expansion and cold shrinkage phenomenon with the change of temperature.

Description

Technical Field

[0001] This utility model relates to the technical field, specifically to a POM horizontal shaft rubber ring assembly based on tapered fit and pre-tightening adjustment. Background Technology

[0002] The cross shaft rubber rings of model helicopters are mostly made of POM material, usually with a straight hole structure, and the rubber ring and the cross shaft are tightly fitted on the outer circle. The clamping force depends on a single dimensional tolerance. POM (polyoxymethylene) has obvious thermal expansion and contraction characteristics. When the temperature changes, the dimensions will deviate significantly, resulting in inconsistent clamping force of the cross shaft. This leads to poor consistency in assembly within the same batch. Therefore, a cross shaft rubber ring assembly is needed to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a POM horizontal shaft rubber ring assembly based on tapered fit and pre-tightening adjustment. The outer rubber ring is sleeved on the outer surface of the inner rubber ring, so that when the inner rubber ring is subjected to the axial force of the horizontal shaft, the inner rubber ring is pressed into the outer rubber ring along the tapered direction. The outer rubber ring separates the inner rubber ring, so that the inner rubber ring is not affected by thermal expansion and contraction due to temperature changes.

[0004] This utility model provides the following technical solution: a POM horizontal shaft rubber ring assembly based on tapered fit and pre-tightening adjustment, comprising an inner rubber ring and an outer rubber ring, characterized in that: the outer rubber ring is inserted into the horizontal shaft seat, the inner rubber ring is disposed on one end of the horizontal shaft, and the inner rubber ring is also inserted into the outer rubber ring; a second conical surface is formed on the outer surface of the inner rubber ring, and a first conical surface is formed on the inner surface of the outer rubber ring; the second conical surface is attached to the first conical surface; when the horizontal shaft is installed, the second conical surface of the inner rubber ring moves along the first conical surface of the outer rubber ring.

[0005] To guide the connection between the inner and outer rubber rings, a sleeve portion is formed on the inner surface of the outer rubber ring, which is located on the narrow opening side of the first conical surface. An insertion portion is formed on the outer surface of the inner rubber ring, which is located on the narrow opening side of the second conical surface. The insertion portion is inserted into the sleeve portion.

[0006] To enhance the locking force between the inner and outer rubber rings, the first and second conical surfaces have the same taper, ranging from 3° to 6°.

[0007] In order to insert and fix the horizontal shaft inside the inner rubber ring, the outer surface of the outer rubber ring is a straight cylindrical outer wall, and the inner surface of the inner rubber ring is a straight cylindrical inner wall.

[0008] A shim is provided between the horizontal shaft and the inner rubber ring to adjust the clamping force between them.

[0009] To facilitate adjustment of the clamping force, the thickness of the shim is 0.1 mm.

[0010] To prevent deformation of the gasket, the force of the horizontal shaft is stably transmitted to the inner rubber ring. The gasket is made of stainless steel or hard plastic.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are: (1) By fitting the outer rubber ring onto the outer surface of the inner rubber ring, the inner rubber ring is pressed into the outer rubber ring along the tapered direction after being subjected to the axial force of the transverse shaft. (2) The outer rubber ring separates the inner rubber ring, so that the inner rubber ring is not affected by thermal expansion and contraction due to temperature changes; (3) The tapered inner rubber ring is subjected to force, resulting in radial contraction, which further clamps the horizontal shaft; (4) By setting shims between the horizontal shaft and the inner rubber ring, the number of shims can be adjusted to finely adjust the clamping force. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of the assembly structure of the outer rubber ring and the inner rubber ring of this utility model; Figure 2 This is a cross-sectional view of the assembly structure of the outer rubber ring and the inner rubber ring of this utility model; Figure 3 This is a three-dimensional view of the inner rubber ring of this utility model; Figure 4 This is a cross-sectional view of the inner rubber ring of this utility model; Figure 5 This is a perspective view of the outer rubber ring of this utility model; Figure 6 This is a cross-sectional view of the outer rubber ring of this utility model; In the figure: 1. Outer rubber ring; 11. Sleeve part; 12. First transition part; 13. First conical surface; 14. Straight cylinder outer wall; 2. Inner rubber ring; 21. Insertion part; 22. Second transition part; 23. Second conical surface; 24. Straight cylinder inner wall. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figures 1 to 6This utility model provides a technical solution: a POM horizontal shaft rubber ring assembly based on tapered fit and pre-tightening adjustment, including an inner rubber ring 2 and an outer rubber ring 1. The outer rubber ring 1 is inserted into the horizontal shaft seat, and there is no compression between the outer rubber ring 1 and the horizontal shaft seat. The inner rubber ring 2 is set on one end of the horizontal shaft and is also inserted into the outer rubber ring 1. A second conical surface 23 is formed on the outer surface of the inner rubber ring 2, and a first conical surface 13 is formed on the inner surface of the outer rubber ring 1. The first conical surface 13 provides a guide conical surface for the inner rubber ring 2 and isolates the influence of external temperature changes on the clamping force. The second conical surface 23 fits against the first conical surface 13. When the horizontal shaft is installed, the second conical surface 23 of the inner rubber ring 2 moves along the first conical surface 13 of the outer rubber ring 1 to form a tapered contact. The pressure plate of the horizontal shaft machine applies a forced axial force, so that the inner rubber ring 2 is pressed into the outer rubber ring 1 along the tapered direction. The inner rubber ring 2 undergoes radial contraction due to the tapered force, further clamping the horizontal shaft.

[0015] like Figure 4 and Figure 6 As shown, a sleeve portion 11 is formed on the inner surface of the outer rubber ring 1. The sleeve portion 11 is located on the narrow opening side of the first conical surface 13. An insertion portion 21 is formed on the outer surface of the inner rubber ring 2. The insertion portion 21 is located on the narrow opening side of the second conical surface 23. The insertion portion 21 is inserted into the sleeve portion 11 to guide the connection between the inner rubber ring 2 and the outer rubber ring 1.

[0016] like Figure 2 As shown, the first conical surface 13 and the second conical surface 23 have the same taper, ranging from 3° to 6°, so that the two are in conical contact under the compression of the horizontal axis.

[0017] The outer surface of the outer rubber ring 1 is a straight cylindrical outer wall 14. The outer diameter of the straight cylindrical outer wall 14 is 0.1 mm smaller than the mounting hole of the horizontal shaft seat, so it is not squeezed by the hole wall and therefore does not change with temperature. The inner surface of the inner rubber ring 2 is a straight cylindrical inner wall 24. The horizontal shaft is inserted into the straight cylindrical inner wall 24. The diameter of the hole in the straight cylindrical inner wall 24 is lightly tight-fitting with the diameter of the horizontal shaft. The diameter of the hole in the straight cylindrical inner wall 24 is 0.02 mm larger than the diameter of the horizontal shaft.

[0018] A shim is provided between the horizontal shaft and the inner rubber ring 2. The shim is made of stainless steel or hard plastic. The axial clamping force is adjusted by the number of shims. The more shims there are, the deeper the inner rubber ring 2 is pressed, the stronger the taper locking, and the greater the clamping force. The clamping force is adjusted by increasing or decreasing the number of shims.

[0019] The thickness of the shims is uniformly 0.1mm, allowing for further fine-tuning of the clamping force.

[0020] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A POM horizontal shaft rubber ring assembly based on tapered fit and preload adjustment, comprising an inner rubber ring and an outer rubber ring, characterized in that: The outer rubber ring is inserted into the horizontal shaft seat, and the inner rubber ring is set on one end of the horizontal shaft. The inner rubber ring is also inserted into the outer rubber ring. A second conical surface is formed on the outer surface of the inner rubber ring, and a first conical surface is formed on the inner surface of the outer rubber ring. The second conical surface is attached to the first conical surface. When the horizontal shaft is installed, the second conical surface of the inner rubber ring moves along the first conical surface of the outer rubber ring.

2. The POM cross-axis rubber ring assembly based on taper cooperation and pre-tightening adjustment according to claim 1, characterized in that: The inner surface of the outer rubber ring is also formed with a sleeve portion, which is located on the narrow opening side of the first conical surface. The outer surface of the inner rubber ring is formed with an insertion portion, which is located on the narrow opening side of the second conical surface. The insertion portion is inserted into the sleeve portion.

3. The POM transverse shaft rubber ring assembly based on tapered fit and preload adjustment according to claim 1, characterized in that: The first and second conical surfaces have the same taper, ranging from 3° to 6°.

4. The POM transverse shaft rubber ring assembly based on tapered fit and preload adjustment according to claim 1, characterized in that: The outer surface of the outer rubber ring is a straight cylindrical outer wall, and the inner surface of the inner rubber ring is a straight cylindrical inner wall.

5. A POM transverse shaft rubber ring assembly based on tapered fit and preload adjustment according to claim 1, characterized in that: A gasket is provided between the horizontal shaft and the inner rubber ring.

6. The POM cross-axis rubber ring assembly based on taper cooperation and pre-tightening adjustment according to claim 5, characterized in that: The thickness of the gasket is 0.1 mm.

7. The POM cross-axis rubber ring assembly based on taper cooperation and pre-tightening adjustment according to claim 5, characterized in that: The gasket is made of stainless steel or hard plastic.

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