Anti-falling elastic cylindrical pin

Abstract

The utility model discloses an anti-falling elastic cylindrical pin, and relates to the technical field of elastic cylindrical pins. The pin comprises an elastic cylindrical pin body, a plurality of barb structures are arranged on the outer wall of the elastic cylindrical pin body, and the barb structures protrude towards the outer side of the elastic cylindrical pin body; the barb structures are obliquely arranged relative to the axial direction of the elastic cylindrical pin body, and the direction of the barb structures is opposite to the insertion direction of the elastic cylindrical pin body during installation. The barb structure is arranged on the outer wall of the elastic cylindrical pin body, the barb structure is obliquely arranged relative to the axial direction of the elastic cylindrical pin body, and the direction of the barb structure is opposite to the insertion direction of the elastic cylindrical pin body when the elastic cylindrical pin body is installed, so that the movement of the elastic cylindrical pin body towards the outer side of the planet carrier can be better limited; therefore, the elastic cylindrical pin body is effectively prevented from falling off, the use reliability of the elastic cylindrical pin body is greatly improved, and the use stability and reliability of the planet carrier and the speed reducer are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field, and particularly relates to an anti-drop elastic cylindrical pin. Background Art

[0002] In a speed reducer, a planetary gear is installed in cooperation with a star wheel frame through a fixed pin shaft, and an elastic cylindrical pin is used to limit the axial position of the fixed pin shaft to prevent the fixed pin shaft from falling off during operation.

[0003] For example, Chinese Utility Model CN202883987U discloses a single-side plate cantilever type planetary frame structure of a planetary gear reducer. The outer diameter of the planetary gear shaft is fitted into the planetary shaft hole, and the pin holes on the planetary gear shaft and the planetary frame bracket correspond one by one. An elastic cylindrical pin is inserted into the pin hole for positioning, so that the planetary gear shaft and the planetary frame bracket are integrated.

[0004] Due to the harsh operating environment of construction machinery, high vibration, and large temperature changes, the elastic cylindrical pins of the fixed pin shaft and the planetary gear frame of the speed reducer fall off during use, and then the planetary gear and the fixed pin shaft fall off, resulting in damage to the planetary mechanism of the speed reducer and the speed reducer. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an anti-drop elastic cylindrical pin. By arranging a barbed structure on the outer wall of the elastic cylindrical pin body, the falling off of the elastic cylindrical pin body is avoided, and the problem that the existing elastic cylindrical pin falls off during use, resulting in damage to the planetary mechanism and the speed reducer, is solved.

[0006] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] The utility model provides an anti-drop elastic cylindrical pin, which includes an elastic cylindrical pin body. A plurality of barbed structures are arranged on the outer wall of the elastic cylindrical pin body, and the barbed structures protrude towards the outside of the elastic cylindrical pin body. Among them, the barbed structures are inclined relative to the axial direction of the elastic cylindrical pin body, and the orientation is opposite to the insertion direction when the elastic cylindrical pin body is installed.

[0008] As a preferred technical solution of the utility model, the inclination angle of the barbed structure relative to the axial direction of the elastic cylindrical pin body is 15° - 75°.

[0009] As a preferred technical solution of the utility model, the number of the barbed structures is two or more.

[0010] As a preferred technical solution of the utility model, the number of the barbed structures is two, and the two barbed structures are symmetrically arranged with respect to the opening direction of the side wall of the elastic cylindrical pin body.

[0011] As a preferred technical solution of the present utility model, the shape of the barb structure is circular arc, square, wedge or triangle.

[0012] As a preferred technical solution of the present utility model, the barb structure and the elastic cylindrical pin body are of an integral structure.

[0013] The present utility model has the following beneficial effects:

[0014] By arranging a plurality of barb structures on the outer wall of the elastic cylindrical pin body, the barb structures protrude towards the outside of the elastic cylindrical pin body, the barb structures are inclined relative to the axial direction of the elastic cylindrical pin body, and the orientation is opposite to the insertion direction when the elastic cylindrical pin body is installed, the movement of the elastic cylindrical pin body towards the outside of the planet carrier can be better limited, thereby effectively avoiding the situation of the elastic cylindrical pin body falling off, greatly improving the use reliability of the elastic cylindrical pin body, and ensuring the use stability and reliability of the planet carrier and the reducer.

[0015] Of course, it is not necessary for any product implementing the present utility model to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is the front view and left view of an anti-drop elastic cylindrical pin of the present utility model;

[0018] Figure 2 It is a schematic structural diagram of the elastic cylindrical pin body and the planet carrier;

[0019] Figure 3 For Figure 2 The enlarged schematic structural diagram of part A in

[0020] In the drawings, the list of components represented by each reference numeral is as follows:

[0021] 1 - elastic cylindrical pin body, 2 - planet carrier, 3 - pin shaft, 4 - planet gear, 101 - barb structure, 102 - opening. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0024] Please refer to Figure 1 As shown, the present invention is an anti-detachment elastic cylindrical pin, which includes an elastic cylindrical pin body 1. The elastic cylindrical pin body 1 has an axially arranged opening 102, so that the cross-sectional shape of the elastic cylindrical pin body 1 forms a C-shaped structure.

[0025] A plurality of barbs structures 101 are arranged on the outer wall of the elastic cylindrical pin body 1, and the barbs structures 101 protrude towards the outside of the elastic cylindrical pin body 1. The number of barbs structures 101 is two or more. Taking the number of barbs structures 101 in the figure as two as an example, the two barbs structures 101 are symmetrically arranged with respect to the opening direction of the opening 102 on the side wall of the elastic cylindrical pin body 1.

[0026] Among them, the barbs structure 101 and the elastic cylindrical pin body 1 are of an integral structure. For example, for the existing elastic cylindrical pins on the market, the barbs structure 101 is machined on the elastic cylindrical pin by an extrusion machine. The shape of the barbs structure 101 is arc-shaped, square, wedge-shaped or triangular. The inclination angle α of the barbs structure 101 relative to the axial direction of the elastic cylindrical pin body 1 is 15° to 75°, to avoid the situation of insufficient tension due to insufficient angle and the fracture of the barbs structure 101 when the elastic cylindrical pin body 1 is knocked in when the angle is too large.

[0027] Moreover, the barbs structure 101 is inclined relative to the axial direction of the elastic cylindrical pin body 1, and the orientation is opposite to the insertion direction when the elastic cylindrical pin body 1 is installed.

[0028] Specifically, as Figure 2 and 3As shown, the planet gear 4 is installed on the planet carrier 2 through a pin shaft 3, bearings, etc. The planet carrier 2 and the pin shaft 3 are provided with pin holes. After the pin holes on the planet carrier 2 and the pin shaft 3 are aligned, the elastic cylindrical pin body 1 is inserted from the pin hole of the planet carrier 2 into the pin hole of the pin shaft 3. Due to the inclined setting of the barb structure 101, a check effect is generated on the elastic cylindrical pin body 1, thus effectively avoiding the situation of the elastic cylindrical pin body 1 falling off and greatly improving the use reliability of the elastic cylindrical pin body.

[0029] And, as Figure 3 shown, after the elastic cylindrical pin body 1 is inserted, the distance L between the barb structure 101 and the port of the insertion end of the pin hole of the planet carrier 2 is greater than 5 mm, ensuring that the barb structure 101 can be fully inserted into the pin hole of the planet carrier 2 and having a certain tolerance distance.

[0030] At the same time, the distance L is less than half of the contact surface length between the elastic cylindrical pin body 1 and the pin hole of the planet carrier 2, so that the whole elastic cylindrical pin body 1 has sufficient contact area with the pin hole of the planet carrier 2, thereby further ensuring the fixing effect and use reliability of the elastic cylindrical pin body 1.

[0031] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] The above-disclosed preferred embodiments of the present invention are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. The present specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An anti-dropping elastic cylindrical pin, characterized in that: It includes an elastic cylindrical pin body (1), and a plurality of barbed structures (101) are arranged on the outer wall of the elastic cylindrical pin body (1), and the barbed structures (101) protrude outward from the elastic cylindrical pin body (1). Among them, the barbed structure (101) is inclined relative to the axial direction of the elastic cylindrical pin body (1), and the orientation is opposite to the insertion direction when the elastic cylindrical pin body (1) is installed.

2. The elastic dowel pin for preventing falling off according to claim 1, wherein The inclination angle of the barbed structure (101) relative to the axial direction of the elastic cylindrical pin body (1) is 15° to 75°.

3. An anti-detachment elastic cylindrical pin according to claim 1 or 2, characterized in that, The number of the barbed structures (101) is two or more.

4. The elastic dowel pin for preventing falling off according to claim 3, wherein, The number of the barbed structures (101) is two, and the two barbed structures (101) are symmetrically arranged with respect to the opening direction of the side wall of the elastic cylindrical pin body (1).

5. An anti-detachment elastic cylindrical pin according to claim 1 or 2 or 4, characterized in that, The shape of the barbed structure (101) is arc-shaped, square, wedge-shaped or triangular.

6. An anti-detachment elastic cylindrical pin according to claim 1 or 2 or 4, characterized in that, The barbed structure (101) and the elastic cylindrical pin body (1) are of an integral structure.

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