Needle bearing

Abstract

The utility model relates to the technical field of bearings, in particular to a needle bearing which comprises a mounting ring, and the inner side of the mounting ring is of an annular structure and is evenly and rotationally connected with a plurality of needle rollers. The mounting ring is fixedly arranged on the inner wall of the roller pin, the fan-shaped blocks are fixedly arranged on the inner wall of the mounting ring, the inner ends of the fan-shaped blocks are in lap joint with the outer wall of the roller pin, the cavity is formed in the fan-shaped blocks, an arc-shaped strip is arranged on the upper side of the interior of the cavity, and the lap joint strip is fixedly arranged on the lower side of the interior of the cavity; the roller pin assembly further comprises a connecting block arranged between the middles of every two adjacent roller pins, a cavity is formed in the upper side of the interior of each connecting block and keeps communicating with the cavity, and the outer wall of each connecting block is in lap joint with the outer wall of the corresponding roller pin. And the arranged connecting blocks are matched with the fan-shaped blocks, when the roller pins are abraded, stable supporting of the roller pins can be guaranteed all the time by combining the communication relation between the cavities and the cavities and utilizing displacement of the rubber blocks, it is guaranteed that the roller pins are evenly stressed, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of bearings, and more particularly to a needle roller bearing. Background Technology

[0002] Needle roller bearings are roller bearings with cylindrical rollers. Relative to their diameter, the rollers are slender. Despite their small cross-section, the bearings still possess high load-bearing capacity. Their radial structure is compact; when the inner diameter and load capacity are the same as other types of bearings, the outer diameter is the smallest, making them particularly suitable for support structures where radial installation space is limited. Because the needle rollers in a needle roller bearing are relatively long axially, if wear occurs near the axial ends of the needle rollers during use, the corresponding needle rollers are prone to tilting. This results in uneven axial force on the needle rollers, increased wear, and a reduced service life. Therefore, we propose a needle roller bearing... Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the present invention provides a needle roller bearing that can effectively solve the problem that the needle rollers of the existing needle roller bearings are too long axially. During use, if wear occurs at the two ends of the needle rollers near the axial direction, the corresponding needle rollers are prone to tilting. At this time, the axial force on the needle rollers is uneven, which reduces the service life of the needle roller bearing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A needle roller bearing includes a mounting ring, wherein the inner side of the mounting ring has a ring-shaped structure and a plurality of needle rollers are uniformly rotatably connected thereto.

[0006] In addition, a plurality of sector-shaped blocks are fixedly disposed on the inner wall of the mounting ring, the inner end of the sector-shaped blocks overlaps with the outer wall of the needle roller, and a cavity is opened in the sector-shaped blocks. An arc-shaped strip is disposed on the upper side of the cavity, and an overlapping strip is fixedly installed on the lower side of the cavity. The upper outer wall of the overlapping strip overlaps with the lower outer wall of the arc-shaped strip.

[0007] It also includes a connecting block disposed between the middle of two adjacent needle rollers, wherein a cavity is provided on the upper side of the connecting block, the cavity is in communication with the cavity body, and the outer wall of the connecting block overlaps with the outer wall of the needle roller.

[0008] Preferably, the mounting ring has a mounting groove on its inner side, and overlapping holes are formed on the inner walls of both sides of the mounting groove. It also includes overlapping shafts fixedly mounted on the outer walls of both ends of the needle roller. The overlapping shafts are mounted on the inner walls of the overlapping holes, and the overlapping shafts are rotatably connected to the overlapping holes.

[0009] Preferably, the device further includes multiple connecting holes formed on the upper outer wall of the sector block, all of which are in communication with the cavity. It also includes a connecting pipe fixedly connected to the connecting block, which is in communication with the interior of the cavity. The connecting holes are in communication with the connecting pipe through connecting grooves formed on the mounting ring.

[0010] Preferably, the connecting block is made of rubber, and arc-shaped surfaces are formed on the outer walls of both sides of the connecting block, with the outer walls of the arc-shaped surfaces overlapping the outer walls of the needle rollers.

[0011] Preferably, it further includes a movable cavity located on the lower side inside the connecting block, in which a rubber block is movably connected. The outer wall of the rubber block slides into the inner wall of the movable cavity, and when the rubber block moves outward, the outer wall of the corresponding arc-shaped surface moves towards the outer wall of the needle roller.

[0012] Preferably, a rubber layer is provided between the chamber and the middle of the movable chamber.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention, through the combination of a connecting block and a sector block, ensures stable support for the rollers when wear occurs, by utilizing the connection between the cavity and the chamber and the displacement of the rubber block, thus ensuring uniform stress and improving the service life of the bearing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the needle roller bearing of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall exploded structure of the needle roller bearing of the present invention;

[0018] Figure 3 This is a schematic cross-sectional view of the mounting ring structure of the present invention;

[0019] Figure 4 This is a front view of the inner wall of the mounting ring of the present invention, specifically the needle roller section.

[0020] Figure 5 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0021] Figure 6This is a schematic diagram of the cross-sectional structure of the sector block in this invention.

[0022] Drawing number explanation:

[0023] 100. Mounting ring; 101. Mounting groove; 102. Overlap hole; 103. Connecting groove;

[0024] 200, needle roller; 210, overlapping shaft;

[0025] 300. Connecting block; 301. Chamber; 302. Movable cavity; 303. Arc-shaped surface; 310. Connecting pipe; 320. Rubber block;

[0026] 400, sector block; 401, connecting hole; 402, cavity; 410, arc strip; 420, overlap strip. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] The following description is intended to disclose the invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0029] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this invention and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this invention.

[0030] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0031] See attached document Figure 1-6As shown, a needle roller bearing includes a mounting ring 100. Multiple needle rollers 200 are rotatably connected to the inner side of the mounting ring 100 in a ring-shaped structure. The inner end of each needle roller 200 is smaller than the inner diameter of the mounting ring 100 to ensure normal operation of the needle rollers 200. To ensure the relative fixation of the needle rollers 200, a mounting groove 101 is provided on the inner side of the mounting ring 100, and overlapping holes 102 are provided on the inner walls of both sides of the mounting groove 101. The device includes overlapping shafts 210 fixedly installed on the outer walls of both ends of the needle roller 200. The overlapping shafts 210 are installed on the inner wall of the overlapping hole 102 and are rotatably connected to the overlapping hole 102. The needle roller 200 is set in the mounting groove 101, and the overlapping shafts 210 are fixedly connected to the ends of the needle roller 200. The overlapping shafts 210 are positioned inside the overlapping hole 102 and can rotate within the overlapping hole 102 to ensure the normal rotation and use of the needle roller 200.

[0032] Furthermore, to ensure the fixed relative position of the needle rollers 200, even if the needle rollers 200 wear down after a period of use, causing a difference in their diameter and affecting their use, this application also includes multiple sector blocks 400 fixedly disposed on the inner wall of the mounting ring 100. The inner end of the sector block 400 overlaps with the outer wall of the needle roller 200. It also includes a connecting block 300 disposed between the middle of two adjacent needle rollers 200, and the outer wall of the connecting block 300 overlaps with the outer wall of the needle roller 200. Specifically, in order to ensure the stability of the needle rollers 200 during use, to be precise, to ensure that the needle rollers 200 can still rotate stably even when they are worn.

[0033] Specifically, through the contact between the inner end outer wall of the sector block 400 and the outer wall of the needle roller 200, the connecting block 300 is made of rubber, and the outer walls of both sides of the connecting block 300 are provided with arc-shaped surfaces 303. The outer walls of the arc-shaped surfaces 303 overlap with the outer walls of the needle roller 200, and the overlap relationship between the arc-shaped surfaces 303 and the outer walls of the needle roller 200 can ensure the structural stability of the needle roller 200 during use.

[0034] After a period of use, the outer wall of the needle roller 200 will wear. To ensure that the bearing can still be used normally under such circumstances, a cavity 402 is provided inside the sector block 400. An arc-shaped strip 410 is provided on the upper side of the cavity 402, and an overlapping strip 420 is fixedly installed on the lower side of the cavity 402. The upper outer wall of the overlapping strip 420 overlaps with the lower outer wall of the arc-shaped strip 410. The inner outer wall of the aforementioned sector block 400 overlaps with the outer wall of the needle roller 200. When the needle roller 200 wears, its radial dimension will decrease. In this case, the lower outer wall of the sector block 400 will move towards one side of the needle roller 200. Since the sector block 400 is also made of rubber, the lower side of the sector block 400 will move towards one side of the needle roller 200. At this time, the space inside the cavity 402 will increase.

[0035] Furthermore, in this application, a chamber 301 is formed on the upper side of the connecting block 300, which is in communication with the cavity 402. It also includes multiple connecting holes 401 formed on the upper outer wall of the sector block 400, all of which are in communication with the cavity 402. Additionally, a connecting pipe 310 is fixedly connected to the connecting block 300, and is in communication with the interior of the chamber 301. The connecting holes 401 are in communication with the connecting pipe 310 through connecting grooves 103 formed on the mounting ring 100. When the inner end of the sector block 400 moves towards the needle roller 200, it ensures stable support for the needle roller 200. Furthermore, in conjunction with the connection holes 401 being in communication with the connecting pipe 310 through the connecting grooves 103, and the connecting pipe 310 being in communication with the interior of the chamber 301, gas in the chamber 301 enters the interior of the cavity 402, correspondingly reducing the space within the chamber 301.

[0036] Furthermore, it also includes a movable cavity 302 located on the lower side inside the connecting block 300, with a rubber block 320 movably connected within the movable cavity 302. A rubber layer is provided between the middle of the chamber 301 and the movable cavity 302. When the space inside the chamber 301 shrinks, the air pressure inside the chamber 301 also decreases due to the rubber layer between the chamber 301 and the movable cavity 302. At this time, under the action of the air pressure inside the movable cavity 302, the rubber layer and the rubber block 320 fixedly connected to the inner end of the rubber layer will move upward synchronously.

[0037] Furthermore, in this application, due to the sliding fit between the inner wall of the movable cavity 302 of the outer wall of the rubber block 320 and the outer wall of the corresponding arc surface 303 moving towards the outer wall of the needle roller 200 when the rubber block 320 moves outward, the outer wall of the corresponding arc surface 303 moves towards the outer wall of the needle roller 200. When the rubber block 320 moves upward, the outer wall of the rubber block 320 and the inner wall of the movable cavity 302 overlap. Because the inner wall of the movable cavity 302 is set in an inclined state, when the corresponding rubber block 320 moves upward, it will drive the connecting block 300 to move closer to the positions of the needle rollers 200 on both sides, thereby achieving stable support for the needle roller 200 and ensuring the stability of the needle roller 200 structure.

[0038] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from the stated principles.

Claims

1. A needle roller bearing, characterized in that, include: Mounting ring (100), the inner side of which has a ring structure and is uniformly connected to multiple needle rollers (200). In addition, a plurality of sector blocks (400) are fixedly disposed on the inner wall of the mounting ring (100), the inner end of the sector block (400) overlaps with the outer wall of the needle roller (200), and a cavity (402) is opened in the sector block (400), an arc strip (410) is provided on the upper side of the cavity (402), and an overlapping strip (420) is fixedly installed on the lower side of the cavity (402), the upper outer wall of the overlapping strip (420) overlaps with the lower outer wall of the arc strip (410); It also includes a connecting block (300) disposed between the middle of two adjacent needle rollers (200), wherein a chamber (301) is provided on the upper side inside the connecting block (300), the chamber (301) is in communication with the cavity (402), and the outer wall of the connecting block (300) overlaps with the outer wall of the needle roller (200).

2. The needle roller bearing according to claim 1, characterized in that: The mounting ring (100) has a mounting groove (101) on its inner side, and overlapping holes (102) are provided on the inner walls of both sides of the mounting groove (101). It also includes overlapping shafts (210) fixedly installed on the outer walls of both ends of the needle roller (200). The overlapping shafts (210) are installed on the inner walls of the overlapping holes (102), and the overlapping shafts (210) are rotatably connected to the overlapping holes (102).

3. A needle roller bearing according to claim 2, characterized in that: It also includes multiple connecting holes (401) opened on the upper outer wall of the sector block (400), all of which are in communication with the cavity (402), and a connecting pipe (310) fixedly connected to the connecting block (300), the connecting pipe (310) being in communication with the interior of the cavity (301), and the connecting holes (401) being in communication with the connecting pipe (310) through connecting grooves (103) opened on the mounting ring (100).

4. A needle roller bearing according to claim 3, characterized in that: The connecting block (300) is made of rubber, and arc-shaped surfaces (303) are provided on the outer walls of both sides of the connecting block (300). The outer wall of the arc-shaped surface (303) overlaps with the outer wall of the needle roller (200).

5. A needle roller bearing according to claim 4, characterized in that: It also includes a movable cavity (302) located on the lower side inside the connecting block (300), in which a rubber block (320) is movably connected. The inner wall of the movable cavity (302) of the rubber block (320) slides in fit with the outer wall of the movable cavity (302), and when the rubber block (320) moves outward, the outer wall of the corresponding arc surface (303) moves towards the outer wall of the needle roller (200).

6. A needle roller bearing according to claim 5, characterized in that: A rubber layer is provided between the middle of the chamber (301) and the movable chamber (302).

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