Flange type oil-free bushing

Abstract

The utility model relates to the technical field of oil-free linings, in particular to a flange type oil-free lining. A flange type oil-free bushing comprises a flange, a mounting cylinder, an oil-free bushing body and the like, the mounting cylinder is fixedly connected to the flange, the oil-free bushing body is mounted in the mounting cylinder, a round hole is formed in the middle of the flange, the diameter of the round hole is smaller than the outer diameter of the oil-free bushing body and larger than the inner diameter of the oil-free bushing body, and a pressing cover is arranged on the right side of the mounting cylinder. Four locking screws are arranged on the pressing cover in the circumferential direction at intervals. According to the utility model, the sealing ring is firstly arranged in the mounting cylinder, then the oil-free bushing is arranged in a close-fitting manner, then the sealing ring is arranged, and finally the pressing cover is arranged and is fixed by the locking screw, so that the two sides of the oil-free bushing are fixed, the oil-free bushing cannot fall off under a vertical or heavy load condition, and the sealing ring can provide buffering for axial impact, so that the service life of the oil-free bushing is prolonged. And dust can be prevented from entering the oil-free bushing from the two sides, the oil-free bushing is prevented from being damaged, and the using stability and reliability of the oil-free bushing are improved.

Description

Technical Field

[0001] This utility model relates to the field of oil-free bushing technology, and in particular to a flange-type oil-free bushing. Background Technology

[0002] Oil-free bushings, as a type of self-lubricating bearing, have significant advantages in actual operation. They do not require additional lubricating oil and can achieve excellent lubrication results solely through the solid lubricant they contain.

[0003] In the installation process, existing oil-free bushings are typically press-fitted into the mounting sleeve using a tight fit method. Furthermore, grooves are machined into the inner holes on both sides of the mounting sleeve for installing O-rings. Generally, the oil-free bushing relies primarily on the tight fit to achieve a secure connection with the mounting sleeve, while the retaining rings serve to assist in securing the bushing.

[0004] However, when used vertically or under heavy loads, the retaining ring is prone to deformation due to overload. Once the retaining ring deforms, it is highly likely that the retaining ring and the oil-free bushing will come out of the mounting sleeve, thus affecting the normal operation of the entire device. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a flange-type oil-free bushing.

[0006] An oil-free flange bushing includes a flange, a mounting sleeve, an oil-free bushing, a clamping cap, and locking screws. The mounting sleeve is fixedly connected to the flange, and the oil-free bushing is installed inside the mounting sleeve. A circular hole is opened in the middle of the flange. The diameter of the circular hole is smaller than the outer diameter of the oil-free bushing and larger than the inner diameter of the oil-free bushing. A clamping cap is provided on the right side of the mounting sleeve, and four locking screws are arranged circumferentially on the clamping cap.

[0007] Optionally, the flange and the mounting sleeve are integrally formed.

[0008] Optionally, the oil-free bushing and the mounting sleeve are installed using an interference fit.

[0009] Optionally, the clamping cap is detachably connected to the mounting sleeve via four locking screws.

[0010] Optionally, it also includes sealing rings, with two sealing rings spaced apart inside the mounting cylinder, the two sealing rings being located on the left and right sides of the oil-free bushing, respectively.

[0011] Optionally, the sealing ring is made of elastic rubber or polytetrafluoroethylene, which has good elasticity and wear resistance and can fit tightly against the inner wall of the mounting cylinder.

[0012] Optionally, the locking screw is an internal hex screw, which is tightened and loosened using an internal hex wrench.

[0013] Optionally, the flange, mounting sleeve, and clamping cap are all made of high-strength metal materials, possessing sufficient strength and rigidity.

[0014] Optionally, the outer wall of the mounting cylinder is treated with a friction coating.

[0015] Optionally, the inner wall of the oil-free bushing (2) is polished to achieve a surface roughness of Ra0.8 or less.

[0016] This utility model has the following advantages: By first installing a sealing ring inside the mounting cylinder, then tightly fitting and installing the oil-free bushing, then installing another sealing ring, and finally installing the pressure cap and fixing it with locking screws, the oil-free bushing is fixed on both sides. In this way, the oil-free bushing will not come out under vertical or heavy load conditions, and the sealing ring can provide a buffer for axial impact and prevent dust from entering the oil-free bushing from both sides, avoiding damage to it, thus improving the stability and reliability of the oil-free bushing. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is an exploded three-dimensional structural diagram of the present invention.

[0019] Figure 3 This is a three-dimensional structural cross-sectional view of the present invention.

[0020] In the attached diagram: 001: Flange, 1: Mounting sleeve, 2: Oil-free bushing, 3: Pressure cap, 4: Locking screw, 5: Sealing ring. Detailed Implementation

[0021] References to embodiments herein mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] Example: A flange-type oil-free bushing, such as Figures 1-3As shown, the device includes a flange 001, a mounting cylinder 1, an oil-free bushing 2, a clamping cap 3, and locking screws 4. The mounting cylinder 1 is fixedly connected to the flange 001. The oil-free bushing 2 is installed inside the mounting cylinder 1. A circular hole is opened in the middle of the flange 001. The diameter of the circular hole is smaller than the outer diameter of the oil-free bushing 2 and larger than the inner diameter of the oil-free bushing 2. The clamping cap 3 is provided on the right side of the mounting cylinder 1. Four locking screws 4 are arranged circumferentially on the clamping cap 3. Four threaded holes are opened circumferentially on the right side of the mounting cylinder 1. The four locking screws 4 can be screwed into the four threaded holes respectively.

[0023] The flange 001 and the mounting cylinder 1 are integrally formed, ensuring the stability of their connection and providing a reliable mounting base for the oil-free bushing 2.

[0024] The oil-free bushing 2 is installed with the mounting cylinder 1 by an interference fit, which ensures that the oil-free bushing 2 is circumferentially fixed in the mounting cylinder 1, prevents it from rotating during operation, and improves the working stability of the oil-free bushing.

[0025] The clamping cap 3 is detachably connected to the mounting cylinder 1 by four locking screws 4. This detachable structure facilitates the installation, removal and maintenance of the oil-free bushing 2.

[0026] like Figure 2 and Figure 3 As shown, it also includes a sealing ring 5. Two sealing rings 5 ​​are arranged at intervals inside the mounting cylinder 1. The two sealing rings 5 ​​are located on the left and right sides of the oil-free bushing 2, respectively. The sealing rings 5 ​​are used to seal the gap between the oil-free bushing 2 and the mounting cylinder 1 to prevent dust, moisture and other impurities from entering.

[0027] The sealing ring 5 is made of elastic rubber or polytetrafluoroethylene, which has good elasticity and wear resistance. It can fit tightly against the inner wall of the mounting cylinder 1, effectively preventing impurities from entering. It can also adapt to the slight deformation of the oil-free bushing 2 during operation, maintaining a stable sealing effect.

[0028] The locking screw 4 is an internal hex screw, which is tightened and loosened using an internal hex wrench. This facilitates installation and disassembly in a limited space, and the tightening torque is controllable, ensuring the reliability of the connection.

[0029] The flange 001, the mounting cylinder 1, and the clamping cover 3 are all made of high-strength metal materials, with sufficient strength and rigidity to withstand the load and impact during operation, ensuring the normal operation of the entire device.

[0030] The outer wall of the mounting cylinder 1 is treated with friction to facilitate the handling of the mounting cylinder 1 by the staff.

[0031] The inner wall of the oil-free bushing 2 is polished to a surface roughness of Ra0.8 or less, in order to reduce the coefficient of friction with the mounting components.

[0032] Working principle: First, the operator installs one of the sealing rings 5 ​​into the interior of the mounting cylinder 1. Since the diameter of the circular hole in the middle of the flange 001 is smaller than the outer diameter of the oil-free bushing 2 but larger than its inner diameter, and the inner and outer diameters of the sealing ring 5 are the same as those of the oil-free bushing 2, this prevents the sealing ring 5 from falling out from one side of the flange 001 during installation. The operator then tightly installs the oil-free bushing 2 into the interior of the mounting cylinder 1, and then installs the other sealing ring 5 from both sides. After blocking the oil-free bushing 2, the clamping cover 3 is finally installed from the right side of the mounting cylinder and fixed with the locking screw 4 to complete the installation. The oil-free bushing 2 is now fixed on both sides. The oil-free bushing 2 is not only fixed by tight fitting with the mounting cylinder 1. Under vertical use or heavy load conditions, the oil-free bushing 2 will not come off. At the same time, the sealing ring 5 not only provides a certain buffering effect for the axial impact of the oil-free bushing 2, but also prevents dust from entering the oil-free bushing 2 from both sides, avoiding damage to the oil-free bushing 2.

[0033] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. A flange-type oil-free bushing, characterized in that, include: Flange (001); Mounting cylinder (1), the mounting cylinder (1) is fixedly connected to the flange (001); Oil-free bushing (2), the oil-free bushing (2) is installed inside the mounting cylinder (1), and a round hole is opened in the middle of the flange (001). The diameter of the round hole is smaller than the outer diameter of the oil-free bushing (2) and larger than the inner diameter of the oil-free bushing (2). A clamping cap (3) is provided on the right side of the mounting cylinder (1); and Locking screws (4): Four locking screws (4) are arranged circumferentially on the pressure cover (3). Four threaded holes are opened circumferentially on the right side of the mounting cylinder (1). The four locking screws (4) can be screwed into the four threaded holes respectively.

2. A flange-type oil-free bushing according to claim 1, characterized in that, The flange (001) and the mounting cylinder (1) are integrally formed.

3. A flange-type oil-free bushing according to claim 2, characterized in that, The oil-free bushing (2) and the mounting sleeve (1) are installed by an interference fit.

4. A flange-type oil-free bushing according to claim 3, characterized in that, The clamping cap (3) is detachably connected to the mounting cylinder (1) by four locking screws (4).

5. A flange-type oil-free bushing according to claim 4, characterized in that, Also includes: The sealing ring (5) is provided in the installation cylinder (1) with two sealing rings (5) spaced apart. The two sealing rings (5) are located on the left and right sides of the oil-free bushing (2) respectively. The inner and outer diameters of the sealing rings (5) are the same as those of the oil-free bushing (2).

6. A flange-type oil-free bushing according to claim 5, characterized in that, The sealing ring (5) is made of elastic rubber or polytetrafluoroethylene, which has good elasticity and wear resistance and can fit tightly against the inner wall of the mounting cylinder (1).

7. A flange-type oil-free bushing according to claim 6, characterized in that, The locking screw (4) is an internal hexagon screw, which is tightened and loosened using an internal hexagon wrench.

8. A flange-type oil-free bushing according to claim 7, characterized in that, The flange (001), the mounting cylinder (1), and the clamping cover (3) are all made of high-strength metal materials and have sufficient strength and rigidity.

9. A flange-type oil-free bushing according to claim 8, characterized in that, The outer wall of the mounting cylinder (1) is treated with friction.

10. A flange-type oil-free bushing according to claim 9, characterized in that, The inner wall of the oil-free bushing (2) is polished, and the surface roughness reaches Ra0.8 or less.

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