A self-lubricating rotating arm

Abstract

The invention discloses a self-lubricating swivel arm, comprising a swivel arm sleeve and a swivel arm, wherein the swivel arm sleeve is tubular, the swivel arm is inserted and movably arranged in the swivel arm sleeve, an oil storage groove arranged in a threaded shape is provided on the inner wall of the swivel arm sleeve, and the oil storage groove is connected to the upper and lower end surfaces of the swivel arm sleeve; further comprising a limit plate and an annular oil seal, the limit plate is cylindrical, sleeved and fixed on the swivel arm, an annular oil storage groove and a radial oil storage groove are provided on the lower end surface of the limit plate, the radial oil storage groove is connected to the inner wall and the outer wall of the limit plate, and is connected to the annular oil storage groove; the annular oil storage groove is connected to the oil storage groove, and is configured as follows: after the lubricating grease is injected through the oil filling port, it can spirally rise through the oil storage groove and enter the annular oil storage groove and the radial oil storage groove; the annular oil seal sleeve is arranged on the limit plate and is threadedly connected to the limit plate. The invention stores lubricating grease through the oil storage groove, the annular oil storage groove and the radial oil storage groove, and the oil storage groove is arranged in a ring shape on the outer periphery of the swivel arm, so the oil storage capacity is large and the lubrication effect is good.

Description

Technical Field

[0001] The invention relates to a mechanical structure, in particular to a self-lubricating rotating arm. Background Art

[0002] The swivel arm structure is one of the commonly used structures in engineering. Its end is connected to the component to realize the axial rotation of the component. It has the characteristics of simple structure and easy operation. However, when this structure is used in an open-air environment, the swivel arm shaft and the swivel arm sleeve need to be regularly disassembled and lubricated with grease to prevent rust and locking between the swivel arm shaft and the swivel arm sleeve, which will affect the normal use in the later stage.

[0003] The inner surface of the arm sleeve and the bottom surface of the limit plate of the traditional arm structure are both smooth. The lubricating grease applied during the installation of the structure will be consumed after a period of use. At that time, the arm shaft and the arm sleeve will be in direct contact, generating a large contact friction force, affecting the normal rotation of the component. If the arm structure is placed outdoors for a long time and the rotation frequency is low, the structure will not be lubricated regularly, and rust and lock will occur, affecting the normal use of the structure.

[0004] In view of this, it is urgent to improve the existing rotating arm structure so that it is suitable for use in harsh outdoor environments and has the characteristics of good lubrication effect and long service life. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the lubricating grease in the existing rotating arm structure will be consumed after a period of use, and it is easy to rust and lock.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is to provide a self-lubricating tumbler, comprising a tumbler sleeve and a tumbler, wherein the tumbler sleeve is tubular, the tumbler is inserted and movably arranged in the tumbler sleeve, and an oil storage groove arranged in a threaded shape is provided on the inner wall of the tumbler sleeve, and the oil storage groove is connected to the upper and lower end surfaces of the tumbler sleeve;

[0007] It also includes a limiting plate and an annular oil seal, wherein the limiting plate is cylindrical, mounted on and fixed to the rotating arm, and an annular oil storage groove and a radial oil storage groove are provided on the lower end surface of the limiting plate, and the radial oil storage groove is connected to the inner wall and the outer wall of the limiting plate, and is connected to the annular oil storage groove;

[0008] The annular oil storage groove is connected to the oil storage tank and is configured as follows: after the lubricating grease is injected through the oil filling port, it can spirally rise through the oil storage groove and enter the annular oil storage groove and the radial oil storage groove; the annular oil seal sleeve is arranged on the limit plate and is threadedly connected to the limit plate.

[0009] In the above scheme, it also includes an end oil seal, a first external thread is provided on the outer peripheral surface of the lower end of the rotating arm sleeve, and a first internal thread adapted to the first external thread is provided on the end oil seal, and the end oil seal is arranged on the rotating arm sleeve by the matching screwing of the first internal thread and the first external thread.

[0010] In the above scheme, a stepped through hole is provided in the end oil seal, the first internal thread is arranged on the inner wall of the large diameter of the stepped through hole, and the lower end of the rotating arm is penetrated in the small diameter of the stepped through hole.

[0011] In the above solution, the step surface of the step through hole presses the lower end surface of the rotating arm sleeve.

[0012] In the above scheme, the rotating arm sleeve is provided with an oil filling port connected to the oil storage tank, and a plug is provided in the oil filling port.

[0013] In the above solution, a base is provided on the rotating arm sleeve, and a connecting through hole is provided on the base.

[0014] In the above scheme, the cross-sections of the oil storage groove, the annular oil storage groove and the radial oil storage groove are all V-shaped.

[0015] In the above scheme, a second external thread is provided on the outer circumferential surface of the limit plate, and a second internal thread matching the second external thread is provided on the inner side surface of the annular oil seal. The annular oil seal is arranged on the limit plate by screwing the second internal thread and the second external thread together.

[0016] Compared with the prior art, the present invention stores lubricating grease through an oil storage tank, an annular oil storage tank and a radial oil storage tank, and the oil storage tank is arranged in a ring shape on the outer periphery of the swing arm. On the one hand, it can reduce contact wear, and on the other hand, it can evenly supply lubricating grease to the swing arm, with a large oil storage capacity and good lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a longitudinal cross-sectional view of the rotating arm sleeve of the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of the limiting plate in the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the annular oil seal in the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the end oil seal in the present invention;

[0022] Figure 6 It is a schematic diagram of the structure of the plug in the present invention;

[0023] Figure 7 A schematic diagram of filling the oil storage tank with oil according to the present invention;

[0024] Figure 8 It is the intention of the present invention to seal the oil storage tank by a plug. DETAILED DESCRIPTION

[0025] The present invention provides a self-lubricating rotating arm, which can effectively solve the problem that the lubricating grease of the existing rotating arm structure will be exhausted after a period of use and will easily rust and lock. The present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] like Figures 1 to 6 As shown, the present invention provides a self-lubricating pivot arm, including a pivot arm sleeve 10 and a pivot arm 20. The pivot arm sleeve 10 is cylindrical, and the pivot arm 20 is inserted and movably arranged in the pivot arm sleeve 10. An oil storage groove 11 arranged in a threaded shape is provided on the inner wall of the pivot arm sleeve 10, and the two ends of the oil storage groove 11 are respectively connected to the upper and lower end surfaces of the pivot arm sleeve 10. The cross-section of the oil storage groove 11 is V-shaped, and a large amount of lubricating grease can be stored. Since the oil storage groove 11 circumferentially surrounds the pivot arm 20, the lubricating grease can be evenly supplied to the outer wall of the pivot arm 20. The lubrication is sufficient and uniform, and the pivot arm 20 can be effectively prevented from rusting and locking.

[0027] The upper part of the rotating arm 20 is fitted with and welded with a limit plate 30. The limit plate 30 is cylindrical, and an annular oil storage groove 31 and a radial oil storage groove 32 are provided on the lower end surface of the limit plate 30. The radial oil storage groove 32 is connected to the inner wall and the outer wall of the limit plate 30, and is connected to the annular oil storage groove 31. Through the annular oil storage groove 31 and the radial oil storage groove 32, on the one hand, more lubricating butter can be stored. On the other hand, when the lubricating butter is full, it overflows through the annular oil storage groove 31 and the radial oil storage groove 32, which can be used as a reference for the amount of lubricating butter added. In order to prevent the lubricating butter from leaking, an annular oil seal 40 for sealing is provided on the limit plate 30. The annular oil seal 40 is sleeved on the limit plate 30 and is threadedly connected to the limit plate 30.

[0028] An end oil seal 50 is provided at the lower end of the swing arm sleeve 10, which also plays a sealing role to prevent the lubricating grease from leaking. A first external thread 12 is provided on the outer peripheral surface of the lower end of the swing arm sleeve 10, and a first internal thread 51 adapted to the first external thread 12 is provided on the end oil seal 50. The end oil seal 50 is arranged on the swing arm sleeve 10 by the first internal thread 51 and the first external thread 12 being screwed together.

[0029] Preferably, a second external thread 33 is provided on the outer peripheral surface of the limit plate 30, and a second internal thread 41 adapted to the second external thread 33 is provided on the inner side surface of the annular oil seal 40. The annular oil seal 40 is arranged on the limit plate 30 by the second internal thread 41 and the second external thread 33 being screwed together.

[0030] A stepped through hole is provided in the end oil seal 50, and a first internal thread 51 is provided on the inner wall of the large diameter of the stepped through hole, and the lower end of the swing arm 20 is inserted into the small diameter of the stepped through hole. The stepped surface 52 of the stepped through hole presses the lower end surface of the swing arm sleeve 10, thereby achieving its sealing function. Preferably, a sealing element such as a sealing ring can be added to the stepped surface 52 to enhance the sealing effect, with a simple structure and reliable sealing.

[0031] The outer wall of the rotating arm sleeve 10 is provided with an oil filling port 13 connected to the oil storage tank 11, and a cock 60 is provided in the oil filling port 13. The cock 60 includes a plug 61 and a handle 62. The outer peripheral surface of the plug 61 is provided with an external thread, and the inner wall of the oil filling port 13 is provided with an internal thread. The plug 61 is threadedly connected to the oil filling port 13.

[0032] A base 70 is provided on the rotating arm sleeve 10, and a connecting through hole 71 is provided on the base 70 for fixing the base 70. The self-lubricating rotating arm can be installed at a designated position through the base 70 to exert its function.

[0033] The self-lubricating rotating arm provided by the present invention is suitable for outdoor open-air places and can adapt to different climatic conditions. The present invention saves the process of regularly disassembling and applying lubricating grease through the self-lubrication of its rotating parts, has the characteristics of simple structure, strong applicability, easy operation, etc., solves the difficult problems in the disassembly, assembly, lubrication and maintenance of large rotating arm structures, and has the following advantages compared with the prior art:

[0034] (1) The self-lubricating swivel arm structure provided by the present invention is relatively simple. By providing the annular oil storage grooves 31 and radial oil storage grooves 32 that are staggered in the circumferential and radial directions at the bottom of the limit plate 30, the limit plate 30 and the swivel arm sleeve 10 can be lubricated and maintained without disassembly and assembly, thereby saving the number of lubrication maintenance personnel.

[0035] (2) The self-lubricating swivel arm can realize self-lubrication of the contact part with the swivel arm 20. By arranging different oil storage tanks inside the swivel arm sleeve 10 and at the bottom of the limit plate 30, the storage of lubricating grease at the contact part between the swivel arm sleeve 10 and the swivel arm 20 is realized, thereby realizing self-lubrication, which greatly improves the lubrication life of the swivel arm 20 and the swivel arm sleeve 10 after applying lubricating grease once;

[0036] (3) The self-lubricating swivel arm has strong applicability and is suitable for outdoor deployment and a variety of harsh climate environments. The sealed storage of lubricating grease can extend the working life of the lubricating grease, save the subsequent maintenance costs, and greatly extend the lubrication maintenance cycle.

[0037] like Figures 7-8 As shown, the embodiment of the present invention includes the following parts:

[0038] Limiting plate and annular oil seal processing:

[0039] The limiting plate 30 is annular, and its inner diameter is slightly larger than the outer diameter of the rotating arm 20. Its upper end surface is welded to the rotating arm 20, and its lower end surface is provided with interlaced annular oil storage grooves 31 and radial oil storage grooves 32 for storing the lubricating grease required for the rotating arm 20 to achieve self-lubrication.

[0040] The cross-section of the annular oil storage groove 31 and the radial oil storage groove 32 is in an inverted "V" shape. When the rotating arm 20 drives the limit plate 30 to rotate, lubricating grease can be automatically applied to the friction sliding area between the limit plate 30 and the top of the rotating arm sleeve 10. The outside of the limit plate 30 is sealed by the annular oil seal 40.

[0041] Processing of arm sleeve and end oil seal:

[0042] The arm sleeve 10 is a tubular structure, the inner diameter of which is slightly larger than the outer diameter of the arm 20, and the outer diameter of which is slightly larger than the outer diameter of the limit plate 30. The oil storage groove 11 of the arm sleeve 10 runs through from the bottom surface to the top surface thereof and is arranged in a spiral manner. The depth of the oil storage groove 11 is the same as the outer diameter of the annular oil storage groove 31 at the bottom of the limit plate 30. The cross section of the oil storage groove 11 is in a side "V" shape. The oil storage groove 11 of this structure can form a larger contact area between the arm 20 and the lubricating grease, and the lubrication effect is good.

[0043] An oil filling port 13 communicating with the oil storage tank 11 is provided in the middle of the swing arm sleeve 10. The lubricating grease stored inside the self-lubricating swing arm is injected through the oil filling port 13. A plug 60 is connected to the inner thread of the oil filling port 13. To prevent the lubricating grease from leaking out, an end oil seal 50 is provided at the bottom of the swing arm sleeve 10.

[0044] Structural assembly:

[0045] After the processing of the limiting plate 30 and the rotating arm sleeve 10 is completed, the rotating arm sleeve 10 is welded to the base 70, and the limiting plate 30 is welded to the rotating arm 20. After the welding is completed, the rotating arm 20 is inserted into the rotating arm sleeve 10, and the bottom surface of the limiting plate 30 is tightly attached to the top surface of the rotating arm sleeve 10.

[0046] Add grease:

[0047] Before filling the lubricating grease, it is necessary to open the annular oil seal 40 outside the limit plate 30, the cock 60 in the middle of the swing arm sleeve 10 and the end oil seal 50 at the bottom of the swing arm sleeve 10, and inject the high-pressure lubricating grease into the swing arm sleeve 10 through the oil filling port 13 using the grease gun 80, so that the inside of the oil storage tank 11 is filled with lubricating grease. When lubricating grease overflows from the bottom of the swing arm sleeve 10, install and tighten the end oil seal 50;

[0048] Continue to inject lubricating grease, the lubricating grease spirally rises through the oil storage tank 11 and enters the annular oil storage tank 31 and the radial oil storage tank 32. When lubricating grease overflows from the annular oil storage tank 31 and the radial oil storage tank 32 at the bottom of the limit plate 30, install the annular oil seal 40 and stop injecting lubricating grease. Finally, install and tighten the plug 60 in the oil filling port 13 on the swing arm sleeve 10, pressurize the lubricating grease in the oil storage tank 11 to form a self-lubricating environment, rotate the swing arm 20, and lubricate each contact surface.

[0049] Compared with the prior art, the present invention stores lubricating grease through an oil storage tank, an annular oil storage tank and a radial oil storage tank, and the oil storage tank is arranged in a ring shape on the outer periphery of the swing arm. On the one hand, it can reduce contact wear, and on the other hand, it can evenly supply lubricating grease to the swing arm, with a large oil storage capacity and good lubrication effect.

[0050] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention.

Claims

1. A self-lubricating tumbler, comprising a tumbler sleeve and a tumbler, wherein the tumbler sleeve is tubular, and the tumbler is inserted and movably arranged in the tumbler sleeve, characterized in that: The inner wall of the rotating arm sleeve is provided with an oil storage groove arranged in a threaded shape, and the oil storage groove is connected to the upper and lower end surfaces of the rotating arm sleeve; It also includes a limiting plate and an annular oil seal, wherein the limiting plate is cylindrical, mounted on and fixed to the upper part of the rotating arm, the upper end surface of the limiting plate is welded to the rotating arm, and the lower end surface of the limiting plate is provided with annular oil storage grooves and radial oil storage grooves which are staggered in circumferential and radial directions, and the radial oil storage grooves are connected to the inner wall and the outer wall of the limiting plate, and are connected to the annular oil storage groove; The annular oil storage tank is connected to the oil storage tank, and is configured such that after the lubricating grease is injected through the oil filling port, it can spirally rise through the oil storage tank and enter the annular oil storage tank and the radial oil storage tank; the annular oil seal sleeve is arranged on the limit plate and is threadedly connected to the limit plate; The depth of the oil storage groove is the same as the outer diameter of the annular oil storage groove on the lower end surface of the limiting plate; the cross-sections of the oil storage groove, the annular oil storage groove and the radial oil storage groove are all V-shaped; It also includes an end oil seal, wherein a first external thread is provided on the outer peripheral surface of the lower end of the rotating arm sleeve, and a first internal thread matching the first external thread is provided on the end oil seal, and the end oil seal is arranged on the rotating arm sleeve through the matching screwing of the first internal thread and the first external thread; A stepped through hole is provided in the end oil seal, the first internal thread is arranged on the inner wall of the large diameter of the stepped through hole, the lower end of the rotating arm is penetrated in the small diameter of the stepped through hole; the stepped surface of the stepped through hole presses the lower end surface of the rotating arm sleeve.

2. A self-lubricating rotating arm according to claim 1, characterized in that: The rotating arm sleeve is provided with an oil filling port connected to the oil storage tank, and a cock is provided in the oil filling port.

3. The self-lubricating rotating arm according to claim 1, characterized in that: The rotating arm sleeve is provided with a base, and the base is provided with a connecting through hole.

4. The self-lubricating rotating arm according to claim 1, characterized in that: A second external thread is provided on the outer circumferential surface of the limiting plate, a second internal thread matched with the second external thread is provided on the inner side surface of the annular oil seal, and the annular oil seal is arranged on the limiting plate by screwing the second internal thread and the second external thread together.

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