Small-size roller needle bearing with bolt shaft

Abstract

The utility model discloses a small-size roller needle bearing with a bolt shaft. Relates to the technical field of bearings. Which comprises a bearing part and a bolt part, the bolt part is adaptively sleeved on the inner side of the bearing part, and is characterized in that an axial oil duct and a radial oil duct are arranged on the inner side of the bolt part, an insertion hole is formed in the end face of one end, located on the inner side of the bearing part, of the bolt part, one end of the axial oil duct is communicated with the insertion hole, and the other end of the radial oil duct is communicated with the bearing part. The other end of the axial oil duct is communicated with one end of the radial oil duct, and the other end of the radial oil duct is communicated with the outer wall of the bolt part and points to the bearing part; an oil injection block is inserted in the insertion hole, an oil injection channel and a cleaning channel are arranged on the oil injection block, the oil injection channel can be communicated with the axial oil channel, and the cleaning channel is only communicated with the oil injection channel. The oil injection channel can be cleaned through the cleaning channel, and it is ensured that no deteriorated lubricating oil is conveyed to the bearing part.

Description

Technical Field

[0001] This application relates to the field of bearing technology, specifically to a small-sized bolted shaft roller needle bearing. Background Technology

[0002] Bolted roller bearings are precision mechanical components. The bolted shaft allows for quick and easy installation of the bearing on the equipment frame plane. Existing bolted roller bearings typically use needle rollers or single / double-row cylindrical rollers as rolling elements, and their full complement structure can withstand relatively heavy radial loads.

[0003] Chinese patent document CN216642814U discloses a bolt-type support shaft roller bearing, specifically disclosing a rotating bolt; one side of the rotating bolt has an outer ring, another side has a retaining ring, the retaining ring has a dustproof ring, and a rotating roller is provided between the rotating bolt and the outer ring; the top of the inner part of the outer ring has an oil reservoir. This utility model adds an oil reservoir structure inside the outer ring. By injecting grease into the oil reservoir, when the roller bearing rotates at high speed, the roller bearing will generate high temperature under high speed, causing the grease to flow through the oil outlet to the transmission roller, thereby filling the inside of the roller bearing with grease.

[0004] However, the aforementioned patents do not allow for cleaning of the oil inlet and oil reservoir, which results in a large amount of deteriorated lubricating oil remaining in the oil inlet or oil reservoir after prolonged use or multiple oiling, thus affecting the lubrication effect. Utility Model Content

[0005] To overcome the problem that existing bearings cannot clean the oil inlet and oil reservoir of lubricating oil, this application provides a small-sized bolted shaft roller needle bearing.

[0006] This application adopts the following technical solution: a small-sized bolted shaft roller needle bearing, including a bearing part and a bolt part, wherein the bolt part is adaptedly sleeved on the inner side of the bearing part, characterized in that the inner side of the bolt part is provided with an axial oil passage and a radial oil passage, one end face of the bolt part located on the inner side of the bearing part is provided with a insertion hole, one end of the axial oil passage communicates with the insertion hole, the other end of the axial oil passage communicates with one end of the radial oil passage, and the other end of the radial oil passage communicates with the outer wall of the bolt part and points towards the bearing part;

[0007] An oil injection block is inserted into the socket. The oil injection block has an oil injection channel and a cleaning channel. The oil injection channel can communicate with the axial oil passage, and the cleaning channel is only connected to the oil injection channel.

[0008] Optionally, the oil injection channel and the cleaning channel are symmetrically arranged on both sides of the axis of the oil injection block. One end of the oil injection channel located inside the oil injection block is connected to the other end of the cleaning channel located inside the oil injection block. The oil injection channel extends along the axial direction of the oil injection block and penetrates the oil injection block, while the cleaning channel extends along the axial direction of the oil injection block but does not penetrate the oil injection block.

[0009] Optionally, the insertion hole is an internal hexagonal hole, the outer wall of the oil injection block fits against the inner wall of the insertion hole, and the depth of the insertion hole is less than the thickness of the oil injection block.

[0010] Optionally, the end of the bolt is further provided with a limiting sleeve, the limiting sleeve being coaxially arranged with the insertion hole, the oil injection block being inserted into the insertion hole through the limiting sleeve, and the outer wall of the oil injection block being in contact with the inner wall of the limiting sleeve;

[0011] Both the outer wall of the limiting sleeve and the outer wall of the oil injection block are provided with a threaded hole. A locking nut can be screwed into the two threaded holes. When the locking nut is screwed into the two threaded holes, the oil injection channel is connected to the axial oil passage.

[0012] Optionally, a plug cap is screwed into the oil injection channel, and a plug rod is provided in the cleaning channel. The plug cap and the oil injection channel, and the plug rod and the cleaning channel are both connected by threads.

[0013] The plug cap is used to seal the end of the oil injection channel, and the plug rod is used to seal the internal space of the cleaning channel.

[0014] Optionally, the length of the plug rod is not less than the length of the cleaning channel, and the outer wall of the plug rod fits against the inner wall of the portion of the cleaning channel extending axially along the oil injection block.

[0015] Optionally, a dust cover is provided at both ends of the bearing portion, and the limiting sleeve passes through the dust cover and is located on the outside of the bearing portion.

[0016] Compared to existing technologies, this application can clean the oil injection channel through a cleaning channel, ensuring that no deteriorated lubricating oil is delivered to the bearing section. Furthermore, this application achieves rapid switching between oil injection and cleaning operations by adjusting the insertion angle of the oil injection block, thereby improving operational efficiency and reliability. Attached Figure Description

[0017] Figure 1 This is an illustrative three-dimensional representation of the present application. Figure 1 ;

[0018] Figure 2 This is an illustrative three-dimensional representation of the present application. Figure 2 ;

[0019] Figure 3 This is a reference diagram of the explosion state of this application;

[0020] Figure 4 This is a reference diagram showing the explosion state of the bolt section;

[0021] Figure 5 This is a cross-sectional view of the internal structure of the bolt section. Figure 1 It also shows the oil filling status;

[0022] Figure 6 This is a cross-sectional view of the internal structure of the bolt section. Figure 2 The cleaning status is also displayed.

[0023] In the diagram: 1. Bearing section; 10. Dust cover plate; 2. Bolt section; 21. Axial oil passage; 22. Radial oil passage; 23. Insertion hole; 3. Oil injection block; 31. Oil injection channel; 32. Cleaning channel; 33. Plug cap; 34. Plug rod; 4. Limit sleeve; 41. Threaded hole; 42. Locking nut. Detailed Implementation

[0024] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] like Figure 1-6 As shown, a small-sized bolted shaft roller needle bearing includes a bearing part 1 and a bolt part 2. The bolt part 2 is fitted inside the bearing part 1. This fit makes the entire bearing structure compact and can adapt to the installation requirements of small size. This arrangement can firmly connect the bolt part 2 and the bearing part 1, ensuring the stability of their relative positions during operation and thus ensuring normal operation of the bearing.

[0026] Furthermore, the bolt portion 2 is provided with an axial oil passage 21, a radial oil passage 22, and a socket 23. The axial oil passage 21 is located inside the bolt portion 2 and extends along the axial direction of the bolt portion 2. The radial oil passage 22 is also located inside the bolt portion 2 and is arranged in the radial direction of the bolt portion 2. One end of the axial oil passage 21 communicates with the socket 23, and the other end of the axial oil passage 21 communicates with one end of the radial oil passage 22. One end of the radial oil passage 22 is connected to the axial oil passage 21, and the other end of the radial oil passage 22 communicates with the outer wall of the bolt portion 2 and points towards the bearing portion 1. In this way, the socket 23, the axial oil passage 21, and the radial oil passage 22 form a continuous lubricating oil flow channel.

[0027] An insertion hole 23 is located on the end face of the bolt portion 2, inside the bearing portion 1. The insertion hole 23 is an internal hexagonal hole. An oil injection block 3 is fitted inside the insertion hole 23. A limiting sleeve 4 is also provided at the end of the bolt portion 2. The limiting sleeve 4 is coaxially arranged with the insertion hole 23. The oil injection block 3 can be inserted into the insertion hole 23 through the limiting sleeve 4. The outer wall of the oil injection block 3 fits against the inner wall of the limiting sleeve 4. In this way, the limiting sleeve 4 and the insertion hole 23 can reliably limit the oil injection block 3. Furthermore, the oil injection block 3 is provided with an oil injection channel 31 and a cleaning channel 32. The oil injection channel 31 and the cleaning channel 32 are symmetrically arranged on both sides of the axis of the oil injection block 3. The end of the oil injection channel 31 inside the oil injection block 3 is connected to the end of the cleaning channel 32 inside the oil injection block 3. The cleaning channel 32 is only connected to the oil injection channel 31 and is not connected to the axial oil passage 21 or the radial oil passage 22. The oil injection channel 31 extends axially along and through the oil injection block 3, while the cleaning channel 32 extends axially along but does not penetrate the oil injection block 3. The function of the oil injection channel 31 is to inject lubricating oil into the axial oil passage 21 (at this time, the oil injection channel 31 and the axial oil passage 21 are in a state of mutual communication), and the cleaning channel 32 is used to clean the oil injection channel 31 when needed (at this time, the oil injection channel 31 and the axial oil passage 21 are in a state of disconnection). The outer wall of the oil injection block 3 fits against the inner wall of the insertion hole 23 to ensure that the oil does not leak from the gap between them.

[0028] Since the oil injection channel 31 does not coincide with the axis of the oil injection block 3, and the oil injection block 3 is hexagonal, when the oil injection block 3 is inserted into the insertion hole 23 in different directions, the oil injection channel 31 may or may not be connected to the axial oil passage 21. Furthermore, by providing a threaded hole 41 on both the outer wall of the limiting sleeve 4 and the outer wall of the oil injection block 3, the insertion of the oil injection block 3 is marked. That is, when the two threaded holes 41 coincide, the oil injection channel 31 is in a state of mutual communication with the axial oil passage 21. At this time, the locking nut 42 can be screwed into the two threaded holes 41 to achieve the locking effect of the oil injection block 3. In this way, the lubricating oil delivery operation can be stably carried out. Specifically, when lubricating oil is injected through the oil injection channel 31, the lubricating oil will sequentially pass through the axial oil passage 21 and the radial oil passage 22 to reach the bearing part 1, providing lubrication for the bearing part 1.

[0029] When the oil passage needs to be cleaned, first unscrew the locking nut 42 and then pull out the oil injection block 3. Then rotate the oil injection block 3 and insert it into the insertion hole 23. At this time, the oil injection channel 31 cannot be connected with the axial oil passage 21. In this way, the cleaning fluid can be injected into the oil injection channel 31 through the cleaning channel 32, thereby cleaning the oil injection channel 31. This prevents the lubricating oil in the oil injection channel 31, which is far away from the bearing part 1, from being injected into the axial oil passage 21 after deterioration, thus ensuring the reliable quality of the lubricating oil delivered to the bearing part 1.

[0030] A plug cap 33 is screwed into the oil injection channel 31, and a plug rod 34 is installed in the cleaning channel 32. The plug cap 33 and the oil injection channel 31, and the plug rod 34 and the cleaning channel 32, are both connected by threads. The plug cap 33 is used to seal the end of the oil injection channel 31, and the plug rod 34 is used to seal the internal space of the cleaning channel 32. The plug cap 33 and the plug rod 34 prevent dust and impurities from entering the oil injection channel 31 when no oil injection or cleaning operation is performed, ensuring the cleanliness of the oil injection channel 31. The length of the plug rod 34 is not less than the length of the cleaning channel 32, and the outer wall of the plug rod 34 fits against the inner wall of the portion of the cleaning channel 32 extending axially along the oil injection block 3. This prevents lubricating oil from being injected into the cleaning channel 32 during oil injection, reducing the difficulty of subsequent cleaning operations. A dust cover 10 is provided at both ends of the bearing part 1, and a limiting sleeve 4 passes through the dust cover 10 and is located on the outside of the bearing part 1. The dust cover 10 can prevent dust and debris from entering the bearing part 1, protect the internal parts of the bearing part 1, and extend the service life of the bearing part 1.

[0031] The implementation principle of this application is as follows: the oil injection block 3 is inserted into the insertion hole 23 at different rotation angles, so that the oil injection channel 31 on the oil injection block 3 and the axial oil passage 21 can be in a state of mutual communication or separation, thereby realizing the rapid switching between the oil injection state and the cleaning state, ensuring that the oil injection operation and the cleaning operation do not interfere with each other. In this way, lubricating oil can be delivered to the bearing part 1 through the oil injection channel 31, and cleaning fluid can be delivered to the oil injection channel 31 through the cleaning fluid. This ensures that the oil injection channel 31 is in a clean state before the lubricating oil is injected, preventing the lubricating oil in the oil injection channel 31 from being delivered to the bearing part 1 after it has deteriorated.

[0032] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A small-sized bolted roller needle bearing, comprising a bearing portion (1) and a bolt portion (2), wherein the bolt portion (2) is adaptedly sleeved on the inner side of the bearing portion (1), characterized in that, The inner side of the bolt part (2) is provided with an axial oil passage (21) and a radial oil passage (22). The end face of the bolt part (2) located inside the bearing part (1) is provided with a socket (23). One end of the axial oil passage (21) is connected to the socket (23), and the other end of the axial oil passage (21) is connected to one end of the radial oil passage (22). The other end of the radial oil passage (22) is connected to the outer wall of the bolt part (2) and points towards the bearing part (1). An oil injection block (3) is inserted into the insertion hole (23). The oil injection block (3) is provided with an oil injection channel (31) and a cleaning channel (32). The oil injection channel (31) can communicate with the axial oil passage (21), and the cleaning channel (32) is only connected to the oil injection channel (31).

2. The small-sized bolt-driven needle roller bearing according to claim 1, characterized in that, The oil injection channel (31) and the cleaning channel (32) are symmetrically arranged on both sides of the axis of the oil injection block (3). One end of the oil injection channel (31) located inside the oil injection block (3) is connected to the other end of the cleaning channel (32) located inside the oil injection block (3). The oil injection channel (31) extends along the axial direction of the oil injection block (3) and penetrates the oil injection block (3). The cleaning channel (32) extends along the axial direction of the oil injection block (3) but does not penetrate the oil injection block (3).

3. A small-sized bolt-driven needle roller bearing according to claim 2, characterized in that, The insertion hole (23) is an internal hexagonal hole, the outer wall of the oil injection block (3) is in contact with the inner wall of the insertion hole (23), and the depth of the insertion hole (23) is less than the thickness of the oil injection block (3).

4. A small-sized bolted shaft roller needle bearing according to claim 3, characterized in that, The end of the bolt part (2) is also provided with a limiting sleeve (4). The limiting sleeve (4) is coaxially arranged with the insertion hole (23). The oil injection block (3) can be inserted into the insertion hole (23) through the limiting sleeve (4). The outer wall of the oil injection block (3) is in contact with the inner wall of the limiting sleeve (4). Both the outer wall of the limiting sleeve (4) and the outer wall of the oil injection block (3) are provided with a threaded hole (41). A locking nut (42) can be screwed into the two threaded holes (41). When the locking nut (42) is screwed into the two threaded holes (41), the oil injection channel (31) is connected to the axial oil passage (21).

5. A small-sized bolted shaft roller needle bearing according to claim 2, characterized in that, A plug cap (33) is screwed into the oil injection channel (31), and a plug rod (34) is provided in the cleaning channel (32). The plug cap (33) and the oil injection channel (31) are connected by threads, and the plug rod (34) and the cleaning channel (32) are connected by threads. The plug cap (33) is used to seal the end of the oil injection channel (31), and the plug rod (34) is used to seal the internal space of the cleaning channel (32).

6. A small-sized bolted shaft roller needle bearing according to claim 5, characterized in that, The length of the plug rod (34) is not less than the length of the cleaning channel (32), and the outer wall of the plug rod (34) is in contact with the inner wall of the portion of the cleaning channel (32) extending axially along the oil injection block (3).

7. A small-sized bolted shaft roller needle bearing according to claim 4, characterized in that, The bearing part (1) is provided with a dust cover (10) at both ends, and the limiting sleeve (4) passes through the dust cover (10) and is located on the outside of the bearing part (1).

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