PTFE (Polytetrafluoroethylene) lining positioning structure

Abstract

The utility model discloses a PTFE (Polytetrafluoroethylene) lining positioning structure, which relates to the technical field of lining positioning and comprises an end cover and a shaft sleeve, a PTFE lining body is mounted on the outer side of the end cover, a plurality of outer pin holes are formed in the outer side of the end cover, a plurality of inner pin holes are formed in the inner side of the PTFE lining body, the outer pin holes are matched with the inner pin holes, and the shaft sleeve is sleeved with the PTFE lining body. The PTFE bushing has the advantages that after the PTFE bushing body is embedded on the outer side of the end cover, the pin is wedged into the outer pin hole and the inner pin hole through knocking, the PTFE bushing body can be guaranteed not to loosen under the condition of abrasion and heating, the pin is a'wedged 'part of the PTFE bushing, and the PTFE bushing body can be prevented from loosening due to the pin, so that the PTFE bushing body can be prevented from loosening, and the service life of the PTFE bushing body is prolonged, and the service life of the PTFE bushing body is prolonged. And almost no space is occupied.

Description

Technical Field

[0001] The utility model relates to the technical field of bushing positioning, in particular to a PTFE bushing positioning structure. Background Art

[0002] As a ring sleeve that acts as a cushion, the bushing is of great significance in the use of machinery. The use of bushings can effectively prevent component damage. During the maintenance process, there is no need to replace parts, only the bushing needs to be replaced, which can save costs to a great extent.

[0003] At present, after the existing PTFE bushing is installed, after the machine has been running for a long time, the gap between the shaft sleeve and the bushing is very small. When the shaft sleeve rotates, friction will cause the bushing to heat up. The PTFE bushing will become soft after heating, which can easily cause the bushing to fall off the end cover. For this reason, we propose a PTFE bushing positioning structure. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a PTFE bushing positioning structure, which solves the problems raised in the above background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a PTFE bushing positioning structure, including an end cover and a shaft sleeve, a PTFE bushing body is installed on the outer side of the end cover, a plurality of outer pin holes are opened on the outer side of the end cover, a plurality of inner pin holes are opened on the inner side of the PTFE bushing body, the outer pin holes cooperate with the inner pin holes, and pins are inserted into the inner sides of the outer pin holes and the inner pin holes.

[0006] Preferably, a plurality of positioning blocks are fixedly mounted on the outer side of the end cover, and a plurality of positioning grooves are provided inside the bottom of the PTFE bushing body, and the positioning grooves cooperate with the positioning blocks.

[0007] Preferably, a first chamfer is provided at the bottom of the inner side of the PTFE bushing body, and the first chamfer cooperates with the end cover.

[0008] Preferably, a side groove is formed on one side of the pin.

[0009] Preferably, a wear-resistant layer is provided on the outer side of the PTFE bushing body.

[0010] Preferably, a second chamfer is provided at the top of one side of the positioning block, and a third chamfer is provided at the bottom of the PTFE bushing body and on both sides of the positioning groove, and the second chamfer matches the third chamfer.

[0011] The utility model provides a PTFE bushing positioning structure, which has the following beneficial effects:

[0012] 1. The PTFE bushing positioning structure is to install the PTFE bushing body on the outside of the end cover, and then wedge the pin into the outer pin hole and the inner pin hole by knocking, so as to ensure that the PTFE bushing body will not loosen even if there is wear and heat. Since the pin is "wedged" into part of the PTFE bushing, it takes up almost no space. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a top view of the PTFE bushing body of the utility model;

[0015] Figure 3 This is a top view of the end cover of the utility model;

[0016] Figure 4 This is a schematic diagram of the end cover of the utility model;

[0017] Figure 5 This is a cross-sectional view of the PTFE bushing body of the utility model;

[0018] Figure 6 For this utility model Figure 1 A in the enlarged view;

[0019] Figure 7 For this utility model Figure 1 Enlarged view of point B in .

[0020] In the figure: 1, end cover; 2, shaft sleeve; 3, PTFE bushing body; 4, outer pin hole; 5, inner pin hole; 6, pin; 7, positioning block; 8, positioning groove; 9, first chamfer; 10, side groove; 11, wear-resistant layer; 12, second chamfer; 13, third chamfer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] See also Figures 1 to 7The utility model provides a technical solution: a PTFE bushing positioning structure, including an end cover 1 and a shaft sleeve 2, a PTFE bushing body 3 is installed on the outer side of the end cover 1, a plurality of outer pin holes 4 are opened on the outer side of the end cover 1, a plurality of inner pin holes 5 are opened on the inner side of the PTFE bushing body 3, the outer pin holes 4 cooperate with the inner pin holes 5, pins 6 are inserted in the inner side of the outer pin holes 4 and the inner pin holes 5, a side groove 10 is opened on one side of the pin 6, wherein the PTFE bushing body 3 and the end cover 1 are The installation method is inlay installation, in which the diameter of the pin 6 is slightly larger than the diameter of the outer pin hole 4 and the inner pin hole 5. During installation, the pin 6 needs to be inserted into the outer pin hole 4 and the inner pin hole 5 by knocking. Then, after the installation is completed, the pin 6 will be "wedged" into part of the PTFE bushing body 3, saving space. At the same time, the PTFE bushing is fixed to ensure that it will not fall off during the initial running-in operation. The function of the side groove 10 is to facilitate the removal of the pin 6 from the outer pin hole 4 and the inner pin hole 5.

[0023] A plurality of positioning blocks 7 are fixedly installed on the outer side of the end cover 1, and a plurality of positioning grooves 8 are opened inside the bottom of the PTFE bushing body 3, and the positioning grooves 8 cooperate with the positioning blocks 7, wherein the positioning blocks 7 and the positioning grooves 8 are used to facilitate the positioning of the installed PTFE bushing body 3 and the end cover 1 to ensure that the outer pin hole 4 and the inner pin hole 5 cooperate. A first chamfer 9 is provided at the bottom of the inner side of the PTFE bushing body 3, and the first chamfer 9 cooperates with the end cover 1, and the function of the first chamfer 9 is to facilitate the installation and connection of the PTFE bushing body 3 and the end cover 1.

[0024] A wear-resistant layer 11 is provided on the outer side of the PTFE bushing body 3, wherein the function of the wear-resistant layer 11 is to improve the wear resistance of the PTFE bushing body 3, a second chamfer 12 is provided on the top of one side of the positioning block 7, and a third chamfer 13 is provided on the bottom of the PTFE bushing body 3 and on both sides of the positioning groove 8, and the second chamfer 12 cooperates with the third chamfer 13, wherein the function of the second chamfer 12 and the third chamfer 13 is to facilitate the positioning when the PTFE bushing body 3 and the end cover 1 are connected.

[0025] In summary, when using the PTFE bushing positioning structure, it is only necessary to install the PTFE bushing body 3 and the end cover 1. During installation, the positioning groove 8 cooperates with the positioning block 7 to ensure the accuracy of the positioning and cooperation of the outer pin hole 4 and the inner pin hole 5 after the PTFE bushing body 3 is installed. After the installation of the PTFE bushing body 3 is completed, the pin 6 is inserted into the outer pin hole 4 and the inner pin hole 5, and then the pin 6 is knocked with a tool to wedge it into the PTFE bushing body 3 to complete the installation. With the pin 6 installed, when the machine is running, the shaft sleeve 2 rotates and rubs against the wear-resistant layer 11 on the outside of the PTFE bushing body 3, and the PTFE bushing body 3 will not loosen or fall off even if the temperature rises.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A PTFE bushing positioning structure, comprising an end cover (1) and a shaft sleeve (2), characterized in that: A PTFE bushing body (3) is installed on the outer side of the end cover (1), a plurality of outer pin holes (4) are opened on the outer side of the end cover (1), a plurality of inner pin holes (5) are opened on the inner side of the PTFE bushing body (3), the outer pin holes (4) cooperate with the inner pin holes (5), and pins (6) are inserted into the inner pin holes (4) and the inner pin holes (5).

2. A PTFE bushing positioning structure according to claim 1, characterized in that: A plurality of positioning blocks (7) are fixedly mounted on the outer side of the end cover (1), and a plurality of positioning grooves (8) are provided inside the bottom of the PTFE bushing body (3), wherein the positioning grooves (8) cooperate with the positioning blocks (7).

3. A PTFE bushing positioning structure according to claim 1, characterized in that: A first chamfer (9) is provided at the bottom of the inner side of the PTFE bushing body (3), and the first chamfer (9) cooperates with the end cover (1).

4. A PTFE bushing positioning structure according to claim 1, characterized in that: A side groove (10) is formed on one side of the pin (6).

5. The PTFE bushing positioning structure according to claim 1, characterized in that: The outer side of the PTFE bushing body (3) is provided with a wear-resistant layer (11).

6. A PTFE bushing positioning structure according to claim 2, characterized in that: A second chamfer (12) is provided at the top of one side of the positioning block (7), and third chamfers (13) are provided at the bottom of the PTFE bushing body (3) and on both sides of the positioning groove (8), and the second chamfer (12) cooperates with the third chamfer (13).

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