Non-standard needle roller bearings

Abstract

The present invention provides a non-standard needle roller bearing, comprising an outer ring and a plurality of needle rollers, the needle rollers being cylindrical and further comprising a core shaft, the core shaft being inserted into the outer ring and forming a raceway with the core shaft for the plurality of needle rollers to roll on, the needle rollers being fully loaded in the raceway and capable of axially sliding along the surface of the core shaft, retaining rings being provided on both sides of the core shaft, the two retaining rings being respectively abutted against the two axial ends of the outer ring, and the inner edges of the retaining rings being radially extended toward the core shaft, the retaining rings being capable of axially limiting the needle rollers in accordance with the axial position of the outer ring, and an oil passage being formed between the axial ends of the outer ring and the retaining rings. In response to the deficiencies of the prior art, the present invention provides a non-standard needle roller bearing, wherein the outer ring and needle rollers are capable of small axial motion relative to the inner ring and having high stability.

Description

Technical Field

[0001] The invention relates to a non-standard needle roller bearing. Background Art

[0002] The turntable divider is a device that achieves intermittent motion of the output shaft through a cam. The turntable divider is usually also provided with an input shaft and a needle roller bearing. During operation, the output shaft first drives the cam to rotate, and then the rotation of the cam drives the output shaft to rotate. The shape of the cam is used to make it transmit to the output shaft only when it rotates to a part of the angle during rotation, thereby achieving the effect of making the output shaft move intermittently. The needle roller bearing includes an outer ring, an inner ring and a needle roller, which are respectively connected to the turntable divider body and the output shaft through the outer ring and the inner ring to provide rotating support. Under some working conditions, the turntable divider requires its output shaft to perform a certain range of axial motion relative to the turntable divider body. The existing technology usually sets a movable part on the turntable divider and connects the outer ring through the movable part, but such a setting will increase the processing difficulty and stability of the turntable divider body. Therefore, it is necessary to start from the bearing and design the corresponding non-standard needle roller bearing. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a non-standard needle roller bearing, the outer ring and the needle roller of which can perform a small axial movement relative to the inner ring and have strong stability.

[0004] To achieve the above-mentioned purpose, the present invention provides a non-standard needle roller bearing, comprising an outer ring, a core shaft and a plurality of needle rollers. The core shaft is inserted into the outer ring and forms a raceway with the core shaft for the rolling of the plurality of needle rollers. The needle rollers can slide axially along the surface of the core shaft. Snap rings are provided on both sides of the core shaft. The two snap rings are respectively abutted against the two axial ends of the outer ring, and the inner edge of the snap ring extends radially toward the core shaft. The snap ring can form an axial limit for the needle roller corresponding to the axial position of the outer ring.

[0005] The advantages of adopting the above technical solution are: an outer ring, a core shaft and several needle rollers are set, the core shaft replaces the inner ring, and a sliding raceway for several needle rollers is formed between the core shaft and the outer ring, and the needle rollers can be axially slid relative to the core shaft surface, so that under the working condition that the output shaft needs to make a certain range of axial movement relative to the turntable divider body, the outer ring and the needle rollers can move axially relative to the core shaft, without the need to set additional movable parts on the turntable divider to connect with the outer ring, thereby reducing the processing difficulty of the turntable divider body; on this basis, sliding retaining rings are set on both sides of the core shaft, so that the retaining rings and the two axial ends of the outer ring The inner ring of the retaining ring is abutted and extended radially toward the core axis to form a certain cover on the raceway, thereby limiting the needle roller within the axial width of the outer ring to ensure the stability of operation; finally, an oil passage is formed between the axial end of the outer ring and the retaining ring, so that the lubricating oil in the turntable divider can smoothly enter and exit the bearing through the oil passage to ensure the lubrication of the bearing. The oil passage is set between the axial end of the outer ring and the retaining ring so that the lubricating oil can enter from one end of the bearing corresponding to the needle roller, and then leave from the other end of the bearing corresponding to the needle roller, so as to completely lubricate the raceway and needle roller.

[0006] The present invention can be further configured as follows: a limiting groove is provided on the core shaft, the limiting groove is annularly arranged with the center coinciding with the axis of the core shaft, a limiting block is provided in the limiting groove, and the limiting block can form an elastic guide sliding of the retaining ring.

[0007] Through further settings, a limit groove is set on the core shaft, and the limit block in the limit groove forms an elastic guided sliding fit with the retaining ring to prevent radial movement or tilting of the retaining ring, and the retaining ring is pressed against the retaining ring through elastic force, further ensuring the stability of operation.

[0008] The present invention may be further configured as follows: the retaining ring axially extends in a direction away from the outer ring to form a cylindrical portion, and the cylindrical portion is slidably mounted on the limiting block.

[0009] By further arranging, a cylinder is provided on the retaining ring, and the cylinder is slidably sleeved on the limit block to form a guided sliding fit between the retaining ring and the limit block.

[0010] The present invention may be further configured as follows: an elastic member is provided between the retaining ring and the limiting block.

[0011] Through further arrangement, an elastic member is provided between the retaining ring and the limit block, and cooperates with the cylinder to form an elastic guided sliding fit between the limit block and the retaining ring, and enables the limit block to elastically press the retaining ring onto the outer ring through the elastic member.

[0012] The present invention can be further configured as follows: an inner edge of the retaining ring and the core shaft are spaced apart.

[0013] Through further settings, on the basis of the guided sliding of the retaining ring cylinder and the limit block, the inner edge of the retaining ring is set to have a gap with the core shaft, so that the core shaft will not affect the retaining ring during rotation, further ensuring stability.

[0014] The present invention can be further configured as follows: mounting grooves are provided on both sides of the core shaft corresponding to the outer ring, the mounting grooves can be used to position components that promote axial movement of the core shaft, and the mounting grooves are provided close to the retaining ring.

[0015] Through further settings, mounting grooves for positioning components that promote axial movement of the core shaft are provided on both sides of the core shaft corresponding to the outer ring, and the mounting grooves are provided at a position close to the retaining ring. Such a setting can limit the retaining ring by the component that promotes axial movement of the core shaft, thereby forming an abutment fit between the retaining ring and the axial end of the outer ring.

[0016] The present invention can be further configured as follows: a plurality of oil grooves connecting the inner and outer sides of the outer ring are provided at the axial end of the outer ring, the oil passage is composed of the oil grooves, the oil grooves are radially extended, and the plurality of oil grooves are arranged at intervals along the circumferential direction of the outer ring end.

[0017] Through further arrangement, the oil channel is formed by the oil groove, and the oil groove is radially extended and arranged at the axial end of the outer ring at intervals in the circumferential direction. The processing difficulty is small, and there is no requirement for the relative position of the retaining ring and the outer ring end, which facilitates processing and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of Embodiment 1 of the present invention;

[0019] Figure 2 This is embodiment 1 of the present invention Figure 1 Enlarged view of part a;

[0020] Figure 3 Schematic diagram of the cooperation between the axial end of the outer ring and the needle roller in the first embodiment of the present invention;

[0021] Figure 4 Schematic diagram of the structure of the outer ring in embodiment 1 of the present invention;

[0022] Figure 5 This is a structural diagram of embodiment 2 of the present invention;

[0023] Figure 6 This is the second embodiment of the present invention Figure 5 Enlarged view of part b;

[0024] Among them: outer ring 1; end 11; oil groove 12; core shaft 2; limit groove 21; limit block 22; mounting groove 23; needle roller 3; raceway 4; retaining ring 5; cylinder 51; elastic member 52. DETAILED DESCRIPTION

[0025] An embodiment of a non-standard needle roller bearing of the present invention is as follows Figure 1-4 As shown: it includes an outer ring 1, a core shaft 2 and several needle rollers 3, the needle rollers 3 are columnar, the core shaft 2 is inserted into the outer ring 1 and forms a raceway 4 for the needle rollers 3 to roll, the needle rollers 3 are fully loaded in the raceway, and the needle rollers 3 can slide axially along the surface of the core shaft 2, and retaining rings 5 are provided on both sides of the core shaft 2. The two retaining rings 5 are respectively abutted against the two axial ends 11 of the outer ring 1, and the inner edge of the retaining ring 5 is radially extended toward the core shaft 2, and the inner edge of the retaining ring 5 and the core shaft 2 are spaced apart. The retaining ring 5 can form an axial limit for the needle roller 3 corresponding to the axial position of the outer ring 1, and an oil passage is formed between the axial end of the outer ring 1 and the retaining ring 5.

[0026] A limiting groove 21 is provided on the core shaft 2, and the limiting groove 21 is annularly arranged with the center coinciding with the axis of the core shaft 2. A limiting block 22 is provided in the limiting groove 21, and the limiting block 22 can form an elastic guided sliding of the retaining ring 5. The retaining ring 5 extends axially in the direction away from the outer ring 1 to form a barrel 51, and the barrel 51 is slidably mounted on the limiting block 22. An elastic member 52 is provided between the retaining ring 5 and the limiting block 22.

[0027] The outer ring 1 is provided with a plurality of oil grooves 12 at the axial end 11 thereof, which are connected to the inner and outer sides of the outer ring 1. The oil passage is formed by the oil grooves 12. The oil grooves 12 are radially extended, and the plurality of oil grooves 12 are arranged at intervals along the circumferential direction of the end 11 of the outer ring 1.

[0028] In this embodiment, the outer ring 1 and the core shaft 2 are respectively connected to the turntable divider body and the output shaft of the turntable divider, and the output shaft can also be directly constituted by the core shaft 2. Due to the characteristic that the needle roller 3 can slide axially along the surface of the core shaft 2, when the turntable divider is running, the outer ring 1 and the needle roller 3 are stationary, and the core shaft 2 moves axially. The setting of the retaining ring 5 can limit the position of the needle roller 3 relative to the outer ring 1 to ensure stability.

[0029] The second embodiment of a non-standard needle roller bearing of the present invention is as follows Figure 5-6 As shown, the difference between it and embodiment 1 is as follows: in this embodiment, the limit groove 21 and the limit block 22 for guiding the sliding of the retaining ring are not provided, and the core shaft 2 is provided with mounting grooves 23 on both sides corresponding to the outer ring 1. The mounting grooves 23 can be used for positioning the components in the turntable divider that promote the axial movement of the core shaft 2, and the mounting grooves 23 are provided near the retaining ring 5. The component of the turntable divider used to promote the axial movement of the core shaft is positioned in the mounting groove 23 near the retaining ring 5, and the retaining ring 5 can be pressed against the outer ring 1 by the component, so that the retaining ring 5 also limits the needle roller 3.

[0030] The above example is only one preferred specific example of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A non-standard needle roller bearing, comprising an outer ring and a plurality of needle rollers, wherein the needle rollers are cylindrical, characterized in that: The cam is secured to the outer surface of the drive shaft and is adapted to engage the drive means for movement of the drive means relative to the outer surface of the drive means.

2. The non-standard needle roller bearing according to claim 1, characterized in that: The inner edge of the retaining ring and the core shaft are spaced apart.

3. The non-standard needle roller bearing according to claim 2, characterized in that: The core shaft is provided with mounting grooves on both sides corresponding to the outer ring. The mounting grooves can be used to position components that promote axial movement of the core shaft, and the mounting grooves are provided close to the retaining ring.

4. The non-standard needle roller bearing according to claim 1, 2 or 3, characterized in that: The outer ring is provided with a plurality of oil grooves at the axial end thereof, which are connected to the inner and outer sides of the outer ring. The oil passage is formed by the oil grooves. The oil grooves are radially extended, and the plurality of oil grooves are arranged at intervals along the circumferential direction of the outer ring end.

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