Maintenance-free self-lubricating device for outdoor heavy-load low-speed sliding pair

Abstract

The invention relates to the field of antenna cars, in particular to a maintenance-free self-lubricating device for an outdoor heavy-load low-speed sliding pair. A spiral oil line is located at the contact position of the shaft face of a main shaft and a shaft hole of a copper shaft sleeve, an oil storage cavity is located at the axis of the upper end of the main shaft, the spiral oil line and the oil storage cavity are communicated through a connecting hole, an oil guide felt rope and an oil seepage stud are arranged in the connecting hole, an internal through hole is formed in the oil seepage stud, and the oil seepage stud is installed at the tail end of the connecting hole to press the oil guide felt rope. A sealing nut is installed at the upper end of the oil storage cavity to seal and protect the whole oil storage cavity.

Description

Technical Field

[0001] The present invention relates to the field of antenna vehicles, and particularly to a maintenance-free self-lubricating device for outdoor heavy-load low-speed sliding pairs. Background Art

[0002] The overall external dimensions required by the compatibility of the transportation mode of the antenna vehicle should be as small as possible, and the antenna array surface should be upright at a high position and the windproof radius should be as large as possible during operation. This contradiction has existed for a long time in the design of mobile radars and still exists today. Generally, a motion mechanism is used in the design to realize the conversion of the attitude of the antenna vehicle. The core component of the motion mechanism is the kinematic pair. Due to the particularity of the operation of the antenna vehicle, especially for mobile radars used in outdoor environments, they are in high-temperature, high-humidity, or salt-fog environments for a long time, and the environment is harsh. For rotating pairs such as the windproof leg rotating shaft and the array pitching rotating shaft on the antenna vehicle, their working frequency is low, they operate discontinuously (within a small angle range), and at the same time, the load is large, which poses special requirements for design and maintenance.

[0003] Currently, rolling pairs are used in the design to solve the problem of easy jamming caused by occasional use during long-term outdoor storage. Grease is selected as the lubricating material. This design has a high cost, high requirements for machining accuracy, and high requirements for the sealing of kinematic pairs. At the same time, the internal cavity of the rolling bearing will produce a cavity effect with the change of the external temperature, causing water accumulation inside the cavity. In the case of occasional use, the bearing will rust inside and cause the failure of the kinematic pair. When a large amount of grease is filled inside the bearing, the long-term effectiveness and replacement of the grease become new problems. Summary of the Invention

[0004] In view of the deficiencies of the existing design, the present invention provides a maintenance-free self-lubricating device for heavy-load low-speed sliding pairs in outdoor environments. The device includes a main shaft, an oil wick rope, an oil seepage stud, a closing nut, and a breather valve. The main shaft is provided with an oil storage cavity. The lubricating oil in the oil storage cavity automatically flows to the rotating surface along the spiral oil line under the action of the oil wick rope, ensuring good lubrication of the kinematic pair. The present invention effectively solves the long-term protection problem of heavy-load low-speed sliding pairs in outdoor environments.

[0005] The technical solution of the present invention is: an outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device, which includes a base, a main shaft, a locking nut, a copper bushing and a rotating member. The rotating member is hinged to the base through the main shaft, and the main shaft is fixed to the base by the locking nut. It is characterized in that: the copper bushing is installed in the shaft hole of the rotating member, and the rotating member forms a rotating surface with the main shaft as the center; the main shaft is provided with spiral oil grooves and an oil storage cavity by itself. An oil guiding felt rope, an oil seeping stud and a closing nut are integrated on the upper part of the main shaft, and a breather valve is arranged on the closing nut; the spiral oil grooves are located at the contact part between the shaft surface of the main shaft and the shaft hole of the copper bushing, and the oil storage cavity is located at the axis of the upper end of the main shaft. The spiral oil grooves and the oil storage cavity are communicated through a connecting hole. The oil guiding felt rope and the oil seeping stud are arranged in the connecting hole. An internal through hole is arranged inside the oil seeping stud. The oil seeping stud is installed at the end of the connecting hole to press the oil guiding felt rope. The closing nut is installed at the upper end of the oil storage cavity to seal and protect the entire oil storage cavity.

[0006] According to the outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device described above, it is characterized in that: it further includes a copper gasket, and the copper gasket is installed on the upper and lower shaft hole end faces of the base.

[0007] According to the outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device described above, it is characterized in that: it further includes a protective cover, and the protective cover protects the entire kinematic pair.

[0008] According to the outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device described above, it is characterized in that: 2 to 4 groups of connecting holes are provided, and an oil guiding felt rope and an oil seeping stud are arranged on each group of connecting holes.

[0009] According to the outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device described above, it is characterized in that: 3 groups of connecting holes are provided.

[0010] According to the outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device described above, it is characterized in that: the internal through hole is 1 mm to 3 mm.

[0011] The beneficial effects of the present invention are: adopting a self-lubricating design, selecting a lubricating oil with good fluidity relative to the grease, and using the gravity of the lubricating oil itself, the capillary phenomenon of the felt, and the differential pressure balance delay mechanism of the breathable film to realize the long-term maintenance-free self-lubricating function of the sliding bearing, thereby improving the environmental adaptability of the sliding pair and reducing the maintenance intensity and frequency of maintenance personnel. At the same time, the design has good derivativeness, and its principle can be applied to other outdoor environments and kinematic pairs, and it also has good effects. Description of the Drawings

[0012] Figure 1 It is a composition diagram of an outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device.

[0013] Figure 2 It is an external shape diagram of the main shaft.

[0014] Figure 3 Structural diagram of the main shaft assembly

[0015] Figure 4 is Figure 3 Oil wire sectional view

[0016] Figure 5 is Figure 3 Sectional view of the II connecting hole

[0017] Figure 6 is Figure 3 Sectional view at the A - A position

[0018] Figure 7 End face view of the permeating nut

[0019] Figure 8 Sectional view of the permeating nut

[0020] Explanation of reference numerals in the drawings: Base 1, main shaft 2, spiral oil wire 21, oil storage cavity 22, connecting hole 23, oil guiding felt rope 3, oil permeating stud 4, internal through hole 41, closing nut 5, breather valve 6, locking nut 7, copper gasket 8, copper bushing 9, protective cover 10, rotating member 11 Specific implementation mode

[0021] The present invention will be further described below in conjunction with the drawings and embodiments

[0022] As Figures 1 to 3 shown, a kind of outdoor heavy - duty low - speed sliding pair maintenance - free self - lubricating device of the present invention includes a base 1, a main shaft 2, a locking nut 7, a copper gasket 8, a copper bushing 9, a protective cover 10 and a rotating member 11. The rotating member 11 is hinged to the base 1 through the main shaft 2, and the main shaft 2 is fixed to the base 1 by the locking nut 7. The copper gasket 8 is installed on the upper and lower shaft hole end faces of the base 1, and its function is to reduce the end face contact friction between the rotating member and the base. The copper bushing 9 is installed in the shaft hole of the rotating member 11, and the rotating member 11 forms a rotating surface with the main shaft 2 as the center. A protective cover 10 can also be arranged on the upper part of the base 1 of the present invention, and the protective cover 10 protects the entire kinematic pair, and the kinematic pair includes the connection and contact parts between the main shaft 2 and the base 1 and the rotating member 11

[0023] As Figures 1 to 3As shown, the main shaft 2 is provided with spiral oil grooves 21 and an oil storage cavity 22 by itself. The upper part of the main shaft 2 integrates an oil guiding felt rope 3, an oil seepage stud 4, and a closing nut 5. A breather valve 6 is arranged on the closing nut 5. The spiral oil grooves 21 are located at the contact part between the shaft surface of the main shaft 2 and the shaft hole of the copper bushing 9. The oil storage cavity 22 is located at the upper end axis of the main shaft 2. The spiral oil grooves 21 and the oil storage cavity 22 are communicated through a connecting hole 23. The oil guiding felt rope 3 and the oil seepage stud 4 are arranged in the connecting hole 23. The oil seepage stud 4 is installed at the end of the connecting hole 23 to press the oil guiding felt rope 3. The closing nut 5 is installed at the upper end of the oil storage cavity 22 to seal and protect the entire oil storage cavity 22. The breather valve 6 is arranged on the closing nut 5 to keep the internal air pressure consistent with the atmospheric pressure.

[0024] As Figure 7 shown, the present invention is provided with 3 groups of connecting holes 23, and an oil guiding felt rope 3 and an oil seepage stud 4 are arranged on each group of connecting holes 23. The present invention can set the number of groups of connecting holes 23 according to actual needs, generally taking 2 to 4 groups.

[0025] As Figure 8 described, an internal through hole 41 is arranged inside the oil seepage stud 4 of the present invention. The internal through hole 41 is set according to the lubrication requirements. Generally, the size of the internal through hole 41 is 1 mm to 3 mm.

[0026] As Figure 2 shown, the main shaft 2 is an integrated body of an outdoor heavy-duty sliding pair maintenance-free self-lubricating device. In addition to the shaft connection function, it is also an integrated base for other functional components and provides an oil storage function. Under the action of its own gravity and the capillary action of the oil guiding felt rope 3, the lubricating oil automatically flows along the spiral oil grooves 21 to the relatively dry copper bushing 9, thereby realizing the self-lubrication of the rotating surface. By adjusting the pressing degree of the oil seepage nut 4 on the oil guiding felt rope 3 and selecting an oil seepage nut with a suitable specification, etc., the control of the lubricating oil amount on the shaft surface is realized. The combination of the two and the oil storage cavities 22 with different specifications work together to realize the maintenance-free self-lubrication function of the sliding pair with different maintenance cycles (one month, three months, six months, and one year). The closing nut 5 prevents the lubricating oil from splashing out and protects the oil from being contaminated by dust and other liquids. The breather valve 6 keeps the air pressure in the oil storage cavity 22 basically consistent with the atmosphere. After the oil seeps out, it can prevent a negative pressure from being formed in the oil storage cavity 22, thereby ensuring the smooth progress of the self-lubrication function. The balance of the breather valve 6 with the atmosphere has a certain delay. When the temperature changes violently (at this time, the contact surface has relatively high requirements for lubrication protection), a relatively high pressure is maintained in the oil storage cavity 22, which is equivalent to automatic pressurization to increase the lubrication condition of the rotating surface.

[0027] The outdoor heavy-duty sliding pair maintenance-free self-lubricating device of the present invention is applicable to the long-term lubrication and protection problems of heavy-duty and low-speed moving pairs in outdoor environments. Especially for moving pairs that are stationary for a long time or move occasionally, it can achieve self-lubrication and protection functions for a relatively long period, and has a good protection effect. With a self-lubricating design, lubricating oil with better fluidity than grease is selected. By utilizing the capillary phenomenon of felt, the gravity of the lubricating oil itself, and the air-permeable membrane pressure difference balance delay mechanism, the long-term self-lubrication function of the moving pair is realized, thereby improving the environmental adaptability of the equipment and reducing the maintenance frequency and intensity of the equipment. This design has good derivativeness. By using the basic principle of this design (i.e., one property and three mechanisms: one property refers to the good fluidity of the lubricating oil; the three mechanisms refer to the pressure difference mechanism formed by the gravity of the lubricating oil itself, the capillary effect of the oil guide felt rope, and the air-permeable membrane pressure difference balance delay mechanism), it can be applied to the outdoor protection of other parts, including moving pairs or non-moving pairs with high protection requirements, such as rust prevention treatment for the internal joint parts of outdoor assemblies, and can also achieve good results.

Claims

1. An outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device, comprising a base, a main shaft, a locking nut, a copper bushing and a rotating member. The rotating member is hinged to the base through the main shaft, and the main shaft is fixed to the base by the locking nut; It is characterized in that: The copper bushing is installed in the shaft hole of the rotating member, and the rotating member forms a rotating surface with the main shaft as the center; the main shaft is provided with spiral oil grooves and an oil storage cavity by itself. An oil guide felt rope, an oil seeping stud and a sealing nut are integrated on the upper part of the main shaft, and a breather valve is arranged on the sealing nut; the spiral oil grooves are located at the contact part between the shaft surface of the main shaft and the shaft hole of the copper bushing, and the oil storage cavity is located at the axis at the upper end of the main shaft. The spiral oil grooves and the oil storage cavity are communicated through a connecting hole. The oil guide felt rope and the oil seeping stud are arranged in the connecting hole. An internal through hole is arranged inside the oil seeping stud. The oil seeping stud is installed at the end of the connecting hole to compress the oil guide felt rope. The sealing nut is installed at the upper end of the oil storage cavity to provide closed protection for the entire oil storage cavity.

2. The outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device according to claim 1, It is characterized in that: It further includes a copper gasket, and the copper gasket is installed on the end faces of the upper and lower shaft holes of the base.

3. The outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device according to claim 1, It is characterized in that: It further includes a protective cover, and the protective cover provides protection for the entire kinematic pair.

4. The outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device according to claim 1, It is characterized in that: 2 to 4 groups of connecting holes are provided, and an oil guide felt rope and an oil seeping stud are arranged on each group of connecting holes.

5. The outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device according to claim 4, It is characterized in that: 3 groups of connecting holes are provided.

6. The outdoor heavy-duty low-speed sliding pair maintenance-free self-lubricating device according to claim 1, It is characterized in that: The internal through hole is 1 mm to 3 mm.

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