Four-axis robot knuckle bearing capable of preventing oil leakage

Abstract

The utility model belongs to the technical field of bearing manufacturing, and discloses a four-axis robot knuckle bearing capable of preventing oil leakage. Comprising an inner ring; the outer ring is sleeved on the periphery of the inner ring; the roller channel is communicated with the inner ring and the outer ring; the mounting groove is formed in the surface of the outer ring and allows the roller to enter the roller channel; the mounting block is matched with the mounting groove and is detachably and fixedly connected with the mounting groove; and the mounting block is communicated with an equipment oil cavity for mounting the knuckle bearing. Oil entering the bearing cavity from the equipment oil cavity can only flow back to the equipment oil cavity from the gap between the mounting block and the mounting groove without leaking to the outside, so that oil gas is completely prevented from leaking outwards from the mounting block, and the safety and the reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing manufacturing, in particular to an oil leakage-proof four-axis robot joint bearing. Background Art

[0002] Cross roller bearings are widely used in the joints of industrial robots due to their high rigidity, high precision, ability to withstand radial, axial loads and overturning moments. The inner and outer rings of this bearing are integral structures, and a gap for installing rollers needs to be opened in the inner ring during assembly; since this type of spherical bearing has a large number of inner ring mounting holes and the inner ring structure is a special-shaped part, it is difficult to realize the structure of opening a wedge groove on the inner ring end face to install rollers like ordinary cross roller bearings.

[0003] Currently, if Figure 1 The figure shows the existing spherical bearing. The commonly used structure is to open a cylindrical roller notch on the outer diameter of the outer ring, and a cylindrical plug is set in the notch. The cylindrical plug is fixed by installing a tapered pin on the end face. This structure is simple to process and easy to implement, but because one side of the bearing end face is connected to the oil cavity of the installation part, there is oil pressure and air pressure in the oil cavity, and the oil will enter the inside of the bearing; if there is no reliable oil seal installed on the cylindrical plug and the tapered pin, air and oil will leak out from the gap between the cylindrical plug and the plug hole and the tapered pin and the tapered pin hole, which will cause a lot of inconvenience to assembly and later maintenance. Utility Model Content

[0004] The utility model aims to solve the above problems and provide a four-axis robot joint bearing which has a simple structure and prevents oil leakage.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an oil-leakage-proof four-axis robot joint bearing, comprising:

[0006] an inner circle;

[0007] An outer ring, sleeved on the outer circumference of the inner ring;

[0008] A roller channel connecting the inner ring and the outer ring;

[0009] Mounting grooves are provided on the outer ring surface for the rollers to enter the roller channels; and

[0010] The mounting block matches the mounting groove, and the two are detachably fixedly connected; the mounting block is communicated with the oil cavity of the equipment where the spherical bearing is mounted.

[0011] According to the utility model, further, it also includes a skeleton oil seal installed on the other side surface of the outer ring.

[0012] According to the utility model, further, the mounting groove and the mounting block are detachably connected by screws.

[0013] According to the utility model, further, the roller channel is arranged obliquely.

[0014] According to the utility model, further, the installation groove is provided on a side close to the inner diameter of the outer ring rib.

[0015] According to the utility model, further, the installation groove is a U-shaped wedge groove, the opening of which passes through one side surface of the outer ring and serves as an entrance for installing the roller, and the installation block is a U-shaped wedge matching therewith and used to close the U-shaped wedge groove.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The oil that enters the bearing cavity from the equipment oil cavity can only flow back to the equipment oil cavity from the gap between the mounting block and the mounting groove, and will not leak to the outside, completely preventing oil and gas from leaking out from the mounting block, improving its safety and reliability. At the same time, it reduces the installation of oil seals on the mounting block and the mounting groove, saving installation time.

[0018] 2. The existing plugging hole at the outer diameter of the bearing outer ring and the cylindrical plugging and tapered pin used to plug the plugging hole are eliminated, and the installation of the roller can also be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a four-axis robot joint bearing in the prior art;

[0020] Figure 2 This is a schematic structural diagram of an oil-leakage-proof four-axis robot joint bearing of the utility model;

[0021] Figure 3 for Figure 1 AA cross-sectional structure schematic diagram.

[0022] In the figure: 1-outer ring, 2-inner ring, 3-mounting block, 4-screw, 5-roller channel, 6-skeleton oil seal, 7-mounting groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 2 and 3As shown, an oil-leakage-proof four-axis robot joint bearing in the embodiment of the utility model comprises an inner ring 2 and an outer ring 1 sleeved on the outer periphery of the inner ring 2, a mounting groove 7 is provided on the surface of the outer ring 1, one end of the mounting groove 7 is connected with the roller channel 5, and the other end of the roller channel 5 is connected with the bearing raceway, the roller is put in from the open end of the mounting groove 7, and enters the bearing raceway through the roller channel 5 to achieve the installation of the roller; wherein, the width of the mounting groove 7 matches the outer diameter of the roller, ensuring that the roller can be smoothly installed in the bearing raceway; the roller channel 5 is tilted to facilitate the roller to smoothly enter the bearing raceway, and the existing plugging hole at the outer diameter of the bearing outer ring and the cylindrical plugging and taper pin used to plug the plugging hole are cancelled, and the installation of the roller can also be achieved. Preferably, the mounting groove 7 is provided on the side close to the inner diameter of the outer ring rib, shortening the path of the roller entering the bearing raceway and improving the installation efficiency.

[0025] In order to prevent the oil in the bearing channel from leaking from the mounting groove 7, a mounting block 3 matching the mounting groove 7 is provided, and the mounting block 3 is detachably fixedly connected to the mounting groove 7. Preferably, the mounting block 3 is detachably fixedly connected to the mounting groove 7 by screws 4. The mounting block 3 is connected to the oil cavity of the equipment on which the spherical bearing is installed. A skeleton oil seal 6 is installed on the other end face of the outer ring 1. By pressing the skeleton oil seal 6, the oil leakage is prevented, and the oil entering the bearing cavity from the equipment oil cavity can only flow back to the oil cavity of the equipment through the gap between the mounting block 3 and the mounting groove 7, and will not leak to the outside.

[0026] The utility model does not need to consider the oil seal problem of the mounting block 3, and the end face of the outer ring 1 does not have a pin hole and does not need to consider the oil leakage problem of the pin hole, thus saving installation time and reducing the later maintenance cost of the enterprise.

[0027] During turning and grinding, rollers need to be installed on the bearing raceway. Before installing the rollers, it is necessary to loosen the screws 4, remove the mounting block 3 embedded in the mounting groove 7, and then put the rollers into the mounting groove 7. The rollers follow the roller channel into the bearing raceway to complete the installation of one roller, and the remaining rollers are installed in the bearing raceway in turn to complete the installation of all rollers; after the rollers are installed, the mounting block 3 is reinstalled into the mounting groove 7, and finally the mounting block 3 is fixed in the mounting groove 7 by the screws 4, so that the bearing assembly can be successfully completed.

[0028] In this embodiment, the installation groove 7 is a U-shaped wedge groove, the opening of which passes through one side surface of the outer ring 1 and serves as an entrance for installing the roller, and the installation block 3 is a U-shaped wedge matched therewith, which is used to close the U-shaped wedge groove. The U-shaped structure has a regular shape, which is convenient for batch processing and production, and improves the convenience of processing and production.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil-leakage-proof four-axis robot joint bearing, characterized in that: include, an inner circle; An outer ring, sleeved on the outer circumference of the inner ring; A roller channel connecting the inner ring and the outer ring; Mounting grooves are provided on the outer ring surface for the rollers to enter the roller channels; and The mounting block matches the mounting groove, and the two are detachably fixedly connected; the mounting block is communicated with the oil cavity of the equipment where the spherical bearing is mounted.

2. The oil-leakage-proof four-axis robot joint bearing according to claim 1, characterized in that: It also includes a skeleton oil seal installed on the other side surface of the outer ring.

3. The oil-leakage-proof four-axis robot joint bearing according to claim 1, characterized in that: The mounting groove and the mounting block are detachably connected via screws.

4. The oil-leakage-proof four-axis robot joint bearing according to claim 1, characterized in that: The roller channel is arranged obliquely.

5. An oil-leakage-proof four-axis robot joint bearing according to any one of claims 1 to 4, characterized in that: The mounting groove is arranged on a side close to the inner diameter of the outer ring rib.

6. An oil-leakage-proof four-axis robot joint bearing according to any one of claims 1 to 4, characterized in that: The installation groove is a U-shaped wedge groove, the opening of which passes through one side surface of the outer ring and serves as an entrance for installing the roller. The installation block is a U-shaped wedge matched therewith and is used to close the U-shaped wedge groove.

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