Inner-ring-free single-system needle bearing convenient to lubricate

Abstract

The utility model discloses an inner-ring-free single-system needle roller bearing convenient to lubricate, which relates to the technical field of needle roller bearings and comprises an outer ring, a retainer and a needle roller body, an upper circular truncated cone is arranged at the top of the needle roller body, a lower circular truncated cone is arranged at the bottom of the needle roller body, a lubricating ring is arranged at the top of the outer ring, and a self-flowing lubricating hole is arranged at the bottom of the lubricating ring. Self-flowing lubricating pipes are arranged at the bottoms of the multiple self-flowing lubricating holes, one ends of the self-flowing lubricating pipes are connected with one side of an arc-shaped lubricating groove body, and the arc-shaped lubricating groove body is located on one side of the upper circular truncated cone The lubricating ring is arranged at the top of the outer ring, the upper circular truncated cone and the lower circular truncated cone are arranged at the top and the bottom of the roller pin body respectively, the self-flowing lubricating pipe is arranged on the self-flowing lubricating hole in the bottom of the lubricating ring, and the arc-shaped lubricating groove body located on one side of the upper circular truncated cone is formed in one end of the self-flowing lubricating pipe. Lubricating liquid flowing out of the arc-shaped lubricating groove body drips on the side wall of the upper circular truncated cone body and flows downwards along the side wall of the upper circular truncated cone body to lubricate the roller pin body.

Description

Technical Field

[0001] The utility model relates to the technical field of needle roller bearings, in particular to a single-series needle roller bearing without an inner ring which is easy to lubricate. Background Art

[0002] Needle roller bearings are roller bearings with cylindrical rollers. The rollers are thin and long relative to their diameter. Such rollers are called needle rollers. Despite their small cross-section, the bearings still have a high load-bearing capacity. Needle roller bearings are equipped with thin and long rollers, so the radial structure is compact. When the inner diameter size and load capacity are the same as other types of bearings, the outer diameter is the smallest. They are particularly suitable for support structures with limited radial installation dimensions.

[0003] Existing needle roller bearings often have insufficient lubricity. During use, the insufficient lubricity can easily lead to bearing failure, thereby reducing the service life of the bearing. In order to solve this technical problem, Chinese patent CN 215333974U discloses a self-lubricating needle roller bearing, including an outer ring, a retaining frame is arranged on the inner side of the outer ring, and a plurality of needle rollers used in conjunction with the retaining frame are arranged on the inner side of the outer ring. The outer ring is a hollow structure, and lubricating liquid is arranged in the hollow layer of the outer ring. A plurality of liquid outlet pipes are arranged on the inner wall of the outer ring, and corresponding ends of the plurality of liquid outlet pipes are connected to lubricating pipes, the surface walls of the plurality of lubricating pipes are provided with a plurality of through holes, and lubricating cotton balls are sleeved on the plurality of lubricating pipes. The patent allows the lubricant to enter the lubrication tube through the outlet tube when the needle roller rotates in the cage, and then the lubricant soaks the lubricating cotton ball through the through hole. When the needle roller rotates in the cage, it rubs against the lubricating cotton ball, thereby applying the lubricant to the needle roller to enhance the lubricity of the needle roller. Moreover, the needle roller can also be continuously coated with lubricant while working to improve its lubrication performance.

[0004] In the above patent, the needle roller needs to contact the lubricating cotton ball for lubrication. Even if the lubricating cotton ball is elastic, it will generate a certain friction resistance, which will affect the smoothness of the needle roller's rotation in the long run. Therefore, the utility model proposes a single-series needle roller bearing without inner ring that is easy to lubricate to solve the shortcomings of the prior art. Utility Model Content

[0005] In view of the above problems, the purpose of the utility model is to provide a single-series needle roller bearing without an inner ring which is easy to lubricate, by arranging a lubrication ring on the top of the outer ring, and then arranging an upper conical body and a lower conical body on the top and bottom of the needle roller body respectively, and then arranging a gravity lubrication tube on the gravity lubrication hole at the bottom of the lubrication ring, and arranging an arc-shaped lubrication groove body on one side of the upper conical body at one end of the gravity lubrication tube, the lubricating liquid flowing out of the arc-shaped lubrication groove body drops on the side wall of the upper conical body and flows down along the side wall of the upper conical body to lubricate the needle roller body.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A single-series needle roller bearing without an inner ring that is easy to lubricate, comprises an outer ring, a retaining frame and a needle roller body, a retaining frame is provided on the inner side of the outer ring, a mounting groove is provided on the retaining frame, a plurality of mounting grooves are provided in a ring array along the inner side of the retaining frame, needle roller bodies are provided in the plurality of mounting grooves, an upper frustum body is provided on the top of the needle roller body, a lower frustum body is provided on the bottom of the needle roller body, a lubrication ring is provided on the top of the outer ring, the lower end of the lubrication ring extends to the inside of the annular cavity of the outer ring, a self-flowing lubrication hole is provided on the bottom of the lubrication ring, a plurality of self-flowing lubrication holes are provided, a plurality of self-flowing lubrication holes are provided, and a self-flowing lubrication tube is provided at the bottom of the plurality of self-flowing lubrication holes, an arc-shaped lubrication groove body is provided inside the annular cavity of the outer ring, one end of the self-flowing lubrication tube is connected to one side of the arc-shaped lubrication groove body, and the arc-shaped lubrication groove body is located on one side of the upper frustum body.

[0008] A further improvement is that a liquid injection port is provided on one side of the top of the lubricating ring, and a sealing cover is threadedly connected to the liquid injection port.

[0009] A further improvement is that a collecting annular groove is provided at the lower part of the annular cavity of the outer ring, and a discharge port is provided on the outer wall of the outer ring, and the discharge port is connected to the inside of the collecting annular groove.

[0010] A further improvement is that the self-flowing lubrication pipe includes a straight pipe and an inclined pipe, the upper end of the straight pipe is connected to the self-flowing lubrication hole, the lower end of the self-flowing lubrication hole is provided with an inclined pipe, one end of the inclined pipe is connected to the arc-shaped lubrication groove body, and the bottom of the arc-shaped lubrication groove body is provided with a dripping port.

[0011] A further improvement is that a ring plate is rotatably provided at the lower part of the arc-shaped lubrication groove body, the ring plate is provided with docking holes corresponding to the self-flow lubrication holes and having a matching size, and connecting rods are symmetrically provided on the top of the ring plate.

[0012] A further improvement is that a revolving groove is provided on the top of the lubricating ring, a control ring is provided in the revolving groove, and the upper end of the connecting rod is connected to the bottom of the control ring.

[0013] The beneficial effects of the utility model are as follows: the utility model arranges a lubrication ring on the top of the outer ring, and then arranges an upper conical body and a lower conical body on the top and bottom of the needle roller body respectively, and then arranges a gravity lubrication tube on the gravity lubrication hole at the bottom of the lubrication ring, and arranges an arc-shaped lubrication groove body at one end of the gravity lubrication tube and located on one side of the upper conical body. The lubricating liquid in the lubrication ring will enter the gravity lubrication tube through the gravity lubrication hole and then enter the arc-shaped lubrication groove body, and then the lubricating liquid flowing out of the arc-shaped lubrication groove body will drop on the side wall of the upper conical body and flow down along the side wall of the upper conical body to lubricate the needle roller body. Since the needle roller body can rotate on the retaining frame, different surfaces of the needle roller body will enter the arc-shaped lubrication groove body in turn, and the position will be lubricated. The entire lubrication process is non-contact lubrication, so it will not affect the running smoothness and stability of the needle roller body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the positional relationship between the arc-shaped lubrication groove body and the needle roller body of the utility model;

[0017] Figure 4 This is a schematic diagram of the installation structure of the arc-shaped lubrication groove and the lubrication ring of the utility model;

[0018] Figure 5 This is a schematic diagram of the internal structure of the lubrication ring of the utility model;

[0019] Figure 6 This is a top view schematic diagram of the self-flowing lubrication hole structure of the utility model;

[0020] Figure 7 This is a top view schematic diagram of the installation structure of the arc-shaped lubrication groove body of the utility model;

[0021] Figure 8 For this utility model Figure 7 A schematic diagram of the structure enlargement in the middle;

[0022] Fig. 9 This is a schematic diagram of the drip outlet structure of the utility model.

[0023] Among them: 1. Outer ring; 2. Cage; 3. Needle roller body; 4. Mounting groove; 5. Upper frustum body; 6. Lower frustum body; 7. Lubrication ring; 8. Gravity lubrication hole; 9. Gravity lubrication tube; 901. Straight tube; 902. Oblique tube; 10. Arc-shaped lubrication groove body; 11. Liquid filling port; 12. Collecting ring groove; 13. Discharge port; 14. Drip port; 15. Ring plate; 16. Docking hole; 17. Connecting rod; 18. Rotating groove; 19. Control ring. DETAILED DESCRIPTION

[0024] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0025] according to Figure 1-9 As shown, this embodiment proposes a single-series needle roller bearing without an inner ring which is easy to lubricate, comprising an outer ring 1, a retaining frame 2 and a needle roller body 3. The retaining frame 2 is provided on the inner side of the outer ring 1, and a mounting groove 4 is provided on the retaining frame 2. The mounting groove 4 is provided in a plurality of groups in a ring array along the inner side of the retaining frame 2, and needle roller bodies 3 are provided in the plurality of mounting grooves 4. An upper truncated cone body 5 is provided on the top of the needle roller body 3, and a lower truncated cone body 6 is provided on the bottom of the needle roller body 3. A lubrication ring 7 is provided on the top of the outer ring 1, and the lower end of the lubrication ring 7 extends to the inside of the annular cavity of the outer ring 1. A self-flowing lubrication hole 8 is provided on the bottom of the lubrication ring 7. There are a plurality of self-flowing lubrication holes 8, and a self-flowing lubrication tube 9 is provided on the bottom of the plurality of self-flowing lubrication holes 8. An arc-shaped lubrication groove body 10 is provided inside the annular cavity of the outer ring 1, and one end of the self-flowing lubrication tube 9 is connected to one side of the arc-shaped lubrication groove body 10, and the arc-shaped lubrication groove body 10 is located on one side of the upper truncated cone body 5. When lubricating the single-series needle roller bearing without inner ring that is easy to lubricate of the utility model, the lubricating liquid in the lubricating ring 7 enters into the interior of the plurality of arc-shaped lubricating grooves 10 from the gravity lubrication hole 8 and the gravity lubrication tube 9. Since the arc-shaped lubricating grooves 10 are arranged on one side of the upper frustum body 5, and the upper frustum body 5 is arranged on the top of the needle roller body 3, the lubricating liquid coming out from the bottom of the arc-shaped lubricating grooves 10 will drip onto one side wall of the upper frustum body 5, and then slide down along the slope surface of the upper frustum body 5 to lubricate the side wall of the needle roller body 3. During the process, since the needle roller body 3 will rotate, the lubricating liquid coming out from the arc-shaped lubrication grooves 10 will realize comprehensive lubrication of the side wall of the needle roller body 3.

[0026] A liquid injection port 11 is provided on one side of the top of the lubricating ring 7, and a sealing cover is threadedly connected to the liquid injection port 11. The liquid injection port 11 is provided to fill the lubricating ring 7 with lubricating liquid.

[0027] A collecting annular groove 12 is provided at the lower part of the annular cavity of the outer ring 1, and a discharge port 13 is provided on the outer wall of the outer ring 1, and the discharge port 13 is connected to the inside of the collecting annular groove 12. The collecting annular groove 12 can collect the residual lubricating liquid lubricating along the side wall of the needle roller body 3, and the collected residual lubricating liquid is discharged from the entire needle roller bearing through the discharge port 13.

[0028] The self-flowing lubricating pipe 9 includes a straight pipe 901 and an inclined pipe 902. The upper end of the straight pipe 901 is connected to the self-flowing lubricating hole 8. The lower end of the self-flowing lubricating hole 8 is provided with an inclined pipe 902. One end of the inclined pipe 902 is connected to the arc-shaped lubricating groove 10. The bottom of the arc-shaped lubricating groove 10 is provided with a dripping port 14. By configuring the self-flowing lubricating pipe 9 to consist of the straight pipe 901 and the inclined pipe 902, it is convenient for the lubricating liquid to smoothly enter the arc-shaped lubricating groove 10.

[0029] A ring plate 15 is rotatably arranged at the lower part of the arc-shaped lubrication groove body 10, and a docking hole 16 corresponding to the self-flowing lubrication hole 8 and having a matching size is arranged on the ring plate 15, and a connecting rod 17 is symmetrically arranged on the top of the ring plate 15. A revolving groove 18 is arranged on the top of the lubrication ring 7, and a control ring 19 is arranged in the revolving groove 18, and the upper end of the connecting rod 17 is connected to the bottom of the control ring 19. By setting the ring plate 15, the docking hole 16, the connecting rod 17, the revolving groove 18 and the control ring 19, the flow rate of the lubricating liquid entering the self-flowing lubrication pipe 9 can be controlled. By rotating the control ring 19 to drive the ring plate 15 to rotate, the larger the overlap between the docking hole 16 and the self-flowing lubrication hole 8, the greater the flow rate, and vice versa.

[0030] The utility model arranges a lubrication ring 7 at the top of the outer ring, and then arranges an upper conical body 5 and a lower conical body 6 at the top and bottom of the needle roller body 3 respectively, and then arranges a gravity lubrication tube 9 on the gravity lubrication hole 8 at the bottom of the lubrication ring, and arranges an arc-shaped lubrication groove body 10 located on one side of the upper conical body 5 at one end of the gravity lubrication tube 9. The lubricating liquid in the lubrication ring 7 will enter the gravity lubrication tube 9 through the gravity lubrication hole 8 and then enter the arc-shaped lubrication groove body 10. Then, the lubricating liquid flowing out of the arc-shaped lubrication groove body 10 drops on the side wall of the upper conical body 5 and flows down along the side wall of the upper conical body 5 to lubricate the needle roller body 3. Since the needle roller body 3 can rotate on the retaining frame 2, different surfaces of the needle roller body 3 will enter the arc-shaped lubrication groove body 10 in turn, and the positions will be lubricated. The entire lubrication process is non-contact lubrication, so it will not affect the running smoothness and stability of the needle roller body 3.

[0031] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A single-line needle roller bearing without an inner ring that is easy to lubricate, comprising an outer ring (1), a cage (2) and a needle roller body (3), wherein the inner side of the outer ring (1) is provided with a cage (2), and the cage (2) is provided with a mounting groove (4), and the mounting groove (4) is provided with a plurality of groups in a circular array along the inner side of the cage (2), and the plurality of groups of the mounting grooves (4) are all provided with a needle roller body (3), characterized in that: An upper truncated cone body (5) is provided at the top of the needle roller body (3), a lower truncated cone body (6) is provided at the bottom of the needle roller body (3), a lubrication ring (7) is provided at the top of the outer ring (1), the lower end of the lubrication ring (7) extends to the inside of the annular cavity of the outer ring (1), a self-flowing lubrication hole (8) is provided at the bottom of the lubrication ring (7), a plurality of self-flowing lubrication holes (8) are provided, and a self-flowing lubrication tube (9) is provided at the bottom of the plurality of self-flowing lubrication holes (8), an arc-shaped lubrication groove body (10) is provided inside the annular cavity of the outer ring (1), one end of the self-flowing lubrication tube (9) is connected to one side of the arc-shaped lubrication groove body (10), and the arc-shaped lubrication groove body (10) is located on one side of the upper truncated cone body (5).

2. The single-line needle roller bearing without inner ring that is easy to lubricate according to claim 1 is characterized in that: A liquid injection port (11) is provided on one side of the top of the lubricating ring (7), and a sealing cover is threadedly connected to the liquid injection port (11).

3. The single-line needle roller bearing without inner ring that is easy to lubricate according to claim 1 is characterized in that: A collecting annular groove (12) is provided at the lower part of the annular cavity of the outer ring (1), and a discharge port (13) is provided on the outer wall of the outer ring (1), wherein the discharge port (13) is connected to the inside of the collecting annular groove (12).

4. The single-line needle roller bearing without inner ring that is easy to lubricate according to claim 1 is characterized in that: The self-flowing lubrication pipe (9) comprises a straight pipe (901) and an inclined pipe (902); the upper end of the straight pipe (901) is connected to the self-flowing lubrication hole (8); the lower end of the self-flowing lubrication hole (8) is provided with an inclined pipe (902); one end of the inclined pipe (902) is connected to an arc-shaped lubrication groove body (10); and a dripping port (14) is provided at the bottom of the arc-shaped lubrication groove body (10).

5. The single-line needle roller bearing without inner ring that is easy to lubricate according to claim 1 is characterized in that: A ring plate (15) is rotatably provided at the lower part of the arc-shaped lubrication groove body (10), and the ring plate (15) is provided with docking holes (16) corresponding to the self-flowing lubrication holes (8) in one-to-one correspondence and with a size that matches the size, and a connecting rod (17) is symmetrically provided at the top of the ring plate (15).

6. The single-line needle roller bearing without inner ring that is easy to lubricate according to claim 5, characterized in that: The top of the lubricating ring (7) is provided with a revolving groove (18), a control ring (19) is provided in the revolving groove (18), and the upper end of the connecting rod (17) is connected to the bottom of the control ring (19).

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