Self-lubricating transmission shaft

Abstract

The utility model discloses a self-lubricating transmission shaft which comprises two shaft rods, one shaft rod is detachably connected with a transmission rod, the other shaft rod is detachably connected with a transmission sleeve, and the transmission rod is connected with the transmission sleeve through a spline. The two shaft rods are sleeved with first positioning sleeves respectively, annular grooves are formed in the first positioning sleeves, the two shaft rods are further sleeved with oil storage tanks, one ends of the oil storage tanks are fixedly connected with connecting sleeves, the connecting sleeves are in threaded connection with the interiors of the annular grooves, the oil storage tanks are provided with a plurality of oil outlet holes communicated with the connecting sleeves, and the connecting sleeves are provided with first through holes. A second through hole communicating with the annular groove is formed in the first positioning sleeve, and one end of the second through hole extends to the inner wall of the first positioning sleeve. The oil storage tanks are mounted on the two shaft rods, so that the two shaft rods can be self-lubricated at the same time.

Description

Technical Field

[0001] This utility model relates to the field of transmission shaft technology, specifically a self-lubricating transmission shaft. Background Technology

[0002] Traditional drive shafts are prone to shortened lifespan due to friction and wear under high-speed, heavy-load conditions, requiring frequent lubrication or complete replacement, resulting in high costs and downtime for maintenance, impacting efficiency. Current self-lubricating technologies mostly rely on external oil supply systems or one-time lubricating coatings, failing to achieve long-term maintenance-free operation; and repairs after wear typically require replacing the entire shaft, which is uneconomical. Therefore, an innovative design that combines self-lubrication, wear resistance, and partial replaceability is urgently needed. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model provides a self-lubricating drive shaft to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] A self-lubricating drive shaft includes two shafts, one of which is detachably connected to a drive rod, and the other shaft is detachably connected to a drive sleeve. The drive rod and the drive sleeve are connected by a spline. Each shaft is fitted with a first positioning sleeve, which has a first positioning hole. One first positioning sleeve abuts against the drive rod, and the other first positioning sleeve abuts against the drive sleeve. Opposite ends of the two first positioning sleeves are provided with sleeves, inside which a first rotary bearing is installed and rotatably connected to the shaft. The first positioning sleeve has an annular groove on its outer side. A circular oil reservoir is also fitted on each shaft, with an annular oil storage cavity inside. One end of the oil reservoir is fixedly connected to a connecting sleeve with an annular cross-section. The connecting sleeve is threaded into the annular groove, and the first rotary bearing is located inside the connecting sleeve. The oil reservoir has several oil outlet holes communicating with the connecting sleeve. The connecting sleeve has a first through hole, and the first positioning sleeve has a second through hole communicating with the annular groove. One end of the second through hole extends to the inner wall of the first positioning sleeve.

[0006] Preferably, the opposite ends of the two shafts are provided with second positioning holes, the opposite ends of the transmission rod and the transmission sleeve are provided with mounting grooves to accommodate the insertion of the shafts, and the transmission rod and the transmission sleeve are provided with third positioning holes communicating with the mounting grooves. The transmission rod and the transmission sleeve are respectively fixed to the two shafts by bolts.

[0007] With the above technical solution, when installing the transmission rod and transmission sleeve, the shaft is first inserted into its respective mounting slot, and then the transmission rod and transmission sleeve are fixed to their respective shafts with bolts. This also makes it easy to disassemble and replace the transmission rod and transmission sleeve.

[0008] Preferably, a second positioning sleeve is fitted on the opposite ends of the two shafts. The second positioning sleeve is rotatably connected to the shaft through a second rotary bearing, and a fourth positioning hole is provided on the second positioning sleeve.

[0009] The above technical solution allows the two shafts to be fixed in the desired position using the second positioning sleeve, thus further stabilizing the shafts.

[0010] Preferably, the transmission rod has a third through hole communicating with the mounting groove thereon, and the transmission sleeve has a fourth through hole communicating with the mounting groove thereon.

[0011] Through the above technical solution, the lubricating oil on one side will penetrate from the mounting groove into the third through hole and then along the third through hole into the transmission sleeve. The lubricating oil on the other side will penetrate from the mounting groove into the fourth through hole and then along the fourth through hole into the transmission rod, thereby adding lubricating oil to the spline connection of the transmission rod and the transmission sleeve.

[0012] Preferably, the side wall of the oil storage tank is provided with an oil filling port, and an end cap is threadedly connected to the oil filling port. The outer wall of the end cap is provided with a sealing ring.

[0013] With the above technical solution, lubricating oil can be added to the oil tank by opening the end cap and adding the oil inlet, while the end cap and sealing ring can prevent lubricating oil leakage.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The transmission rod and transmission sleeve are detachably connected to the two shafts, making it easy to replace the transmission rod and transmission sleeve. When a certain part is worn, only the damaged part needs to be replaced, which reduces maintenance costs.

[0016] One end of the oil reservoir is connected to the first positioning sleeve. The lubricating oil in the oil reservoir enters the connecting sleeve through the oil outlet hole, and then enters the second through hole in the first positioning sleeve through the first through hole on the connecting sleeve. The lubricating oil then permeates to the shaft through the second through hole, thus adding lubricating oil to the shaft and achieving self-lubrication. By installing oil reservoirs on both shafts, both shafts can be lubricated simultaneously. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram showing the oil tank after it has been separated from one of the first positioning sleeves.

[0019] Figure 3 This is a schematic diagram showing the oil tank after it has separated from the other first positioning sleeve.

[0020] Figure 4 This is a cross-sectional view of the present invention;

[0021] Figure 5 for Figure 4 A magnified view of a portion of the image;

[0022] In the diagram: 1-shaft, 2-transmission rod, 3-transmission sleeve, 4-first positioning sleeve, 5-first positioning hole, 6-sleeve, 7-first rotary bearing, 8-annular groove, 9-oil reservoir, 10-connecting sleeve, 11-oil outlet, 12-first through hole, 13-second through hole, 14-second positioning hole, 15-third positioning hole, 16-second positioning sleeve, 17-fourth positioning hole, 18-third through hole, 19-fourth through hole, 20-end cap. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Please see Figures 1-5 A self-lubricating drive shaft includes two shafts 1, one of which is detachably connected to a drive rod 2, and the other is detachably connected to a drive sleeve 3. The drive rod 2 and the drive sleeve 3 are connected by a spline. Specifically, each of the two shafts 1 has a second positioning hole 14 at its opposite end, and the opposite ends of the drive rod 2 and the drive sleeve 3 have mounting grooves to accommodate the insertion of the shaft 1. Both the drive rod 2 and the drive sleeve 3 have a third positioning hole 15 communicating with the mounting grooves. The two shafts are inserted into the mounting grooves of the drive rod 2 and the drive sleeve 3, respectively, and then the drive rod and the drive sleeve are fixed to the two shafts 1 by bolts. Because the drive rod and the drive sleeve are splined, when one shaft rotates, the other shaft will also rotate. When the drive rod or the drive sleeve wears out, only the damaged part needs to be replaced, reducing maintenance costs.

[0026] Two shafts 1 are respectively fitted with first positioning sleeves 4, each with a first positioning hole 5. The first positioning sleeves 4 are fixed to external equipment to support the shafts 1. One first positioning sleeve 4 abuts against the transmission rod 2, and the other abuts against the transmission sleeve 3. Sleeves 6 are located at opposite ends of the two first positioning sleeves 4. First rotary bearings 7 are installed inside the sleeves 6 and are rotatably connected to the shafts 1 through the first rotary bearings 7, allowing the shafts 1 to rotate within the first positioning sleeves 4. The first positioning sleeves 4 are located outside the sleeves 6 and have... The annular groove 8 and the two shafts 1 are also fitted with a circular oil storage tank 9. The oil storage tank 9 has an annular oil storage cavity. One end of the oil storage tank 9 is fixedly connected to a connecting sleeve 10 with an annular cross section. The connecting sleeve 10 is threaded into the annular groove 8, and the first rotary bearing 7 is located inside the connecting sleeve 10. The oil storage tank 9 has several oil outlet holes 11 that communicate with the connecting sleeve. The connecting sleeve 10 has a first through hole 12. The first positioning sleeve 4 has a second through hole 13 that communicates with the annular groove. One end of the second through hole 13 extends to the inner wall of the first positioning sleeve 4. Since one end of the oil reservoir 9 is connected to the first positioning sleeve 4, the lubricating oil in the oil reservoir 9 enters the connecting sleeve 10 through the oil outlet 11, and enters the second through hole 13 in the first positioning sleeve 4 through the first through hole 12 on the connecting sleeve 10. Thus, it permeates to the shaft 1 through the second through hole 13 to add lubricating oil to the shaft 1 and achieve self-lubrication. By installing oil reservoirs 9 on both shafts 1, both shafts 1 can be lubricated at the same time.

[0027] A second positioning sleeve 16 is fitted onto the opposite ends of both shafts 1. The second positioning sleeve 16 is rotatably connected to the shaft 1 via a second rotary bearing. A fourth positioning hole 17 is provided on the second positioning sleeve 16. The two shafts 1 can be fixed in the required position by the second positioning sleeve 16, so that the shafts 1 can be further stabilized.

[0028] The oil reservoir 9 has an oil inlet on its side wall, and an end cap 20 is threaded onto the oil inlet. The outer wall of the end cap 20 is equipped with a sealing ring. By opening the end cap 20, lubricating oil can be added to the oil reservoir 9 through the oil inlet. The end cap 20 and the sealing ring prevent lubricating oil leakage.

[0029] Example 2

[0030] Based on Embodiment 1, the transmission rod 2 is provided with a third through hole 18 communicating with its mounting groove, and the transmission sleeve 3 is provided with a fourth through hole 19 communicating with its mounting groove. When lubricating oil permeates from the oil reservoir 9 onto the shaft 1, the lubricating oil will enter the mounting grooves of the transmission rod 2 and the transmission sleeve 3 along the shaft 1. Lubricating oil on one side will permeate from the mounting groove of the transmission rod 2 into the third through hole 18 and then along the third through hole 18 into the transmission sleeve 3, while lubricating oil on the other side will permeate from the mounting groove of the transmission sleeve 3 into the fourth through hole 19 and then along the fourth through hole 19 into the transmission rod 2, thereby adding lubricating oil to the spline connection of the transmission rod 2 and the transmission sleeve 3.

[0031] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-lubricating drive shaft, characterized in that: It includes two shafts (1), one of which is detachably connected to a transmission rod (2), and the other shaft (1) is detachably connected to a transmission sleeve (3). The transmission rod (2) and the transmission sleeve (3) are connected by a spline. Two first positioning sleeves (4) are respectively fitted on the two shafts (1). The first positioning sleeves (4) have first positioning holes (5). One of the first positioning sleeves (4) abuts against the transmission rod (2), and the other first positioning sleeve (4) abuts against the transmission sleeve (3). The opposite ends of the two first positioning sleeves (4) are provided with sleeves (6). A first rotary bearing (7) is installed in the sleeve (6) and is rotatably connected to the shaft (1) through the first rotary bearing (7). The first positioning sleeve (4) is provided with an annular groove (8) on the outside of the sleeve (6). A circular oil tank is also fitted on the two shafts (1). (9) The oil storage tank (9) is provided with an annular oil storage cavity. One end of the oil storage tank (9) is fixedly connected to a connecting sleeve (10) with an annular cross section. The connecting sleeve (10) is threaded into the annular groove (8), and the first rotary bearing (7) is located inside the connecting sleeve (10). The oil storage tank (9) is provided with several oil outlet holes (11) communicating with the connecting sleeve. The connecting sleeve (10) is provided with a first through hole (12). The first positioning sleeve (4) is provided with a second through hole (13) communicating with the annular groove. One end of the second through hole (13) extends to the inner wall of the first positioning sleeve (4).

2. The self-lubricating drive shaft according to claim 1, characterized in that: The two shafts (1) are provided with second positioning holes (14) at their opposite ends. The transmission rod (2) and the transmission sleeve (3) are provided with mounting grooves to accommodate the insertion of the shafts (1) at their opposite ends. The transmission rod (2) and the transmission sleeve (3) are provided with third positioning holes (15) that communicate with the mounting grooves. The transmission rod (2) and the transmission sleeve (3) are respectively fixed to the two shafts (1) by bolts.

3. A self-lubricating drive shaft according to claim 2, characterized in that: The two shafts (1) are fitted with second positioning sleeves (16) at opposite ends. The second positioning sleeves (16) are rotatably connected to the shafts (1) through the second rotary bearing. The second positioning sleeves (16) are provided with a fourth positioning hole (17).

4. A self-lubricating drive shaft according to claim 3, characterized in that: The transmission rod (2) has a third through hole (18) communicating with the mounting groove thereon, and the transmission sleeve (3) has a fourth through hole (19) communicating with the mounting groove thereon.

5. A self-lubricating drive shaft according to claim 4, characterized in that: The oil storage tank (9) has an oil inlet on its side wall, and an end cap (20) is threaded onto the oil inlet. The outer wall of the end cap (20) is provided with a sealing ring.

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