Guide rail bearing combined by rolling needle bearing and plane bearing

Abstract

The utility model relates to a guide rail bearing combined by a needle roller bearing and a plane bearing, and aims to solve the problems that the noise of the conventional similar product is large, the conventional similar product is arranged in an outer ring in a manner of clamping the needle roller bearing by a group of plane bearings on two sides, and the stability needs to be further improved. The axial load and the radial load are designed for the technical problem to be increased. A roller pin plane bearing assembly is fixedly arranged at one end of a fixing pin of the guide rail bearing; the roller pin plane bearing assembly is characterized in that the roller pin plane bearing assembly comprises a first plane bearing, a roller pin bearing, a second plane bearing and an outer ring, the roller pin bearing is arranged in the middle of the inner diameter of the outer ring, step grooves are symmetrically formed in the two sides of the inner diameter of the outer ring, and the first plane bearing and the second plane bearing are symmetrically arranged in the step grooves in the two sides of the outer ring; the first plane bearing, the needle bearing, the second plane bearing and the outer ring are connected into a whole and fixed to one end of the fixing pin through a connecting screw of the fixing pin, and the other end of the fixing pin is provided with an internal thread or an external thread.

Description

Technical Field

[0001] The utility model relates to a guide rail bearing, which is a guide rail bearing composed of a needle roller bearing and a plane bearing. Background Art

[0002] Bearings are components that fix and reduce the load friction coefficient during mechanical transmission. When other parts move relative to each other on the shaft, they are used to reduce the friction coefficient during power transmission and keep the center position of the shaft fixed. According to the different friction properties of the moving elements, bearings can be divided into two categories: rolling bearings and sliding bearings. Among them, some guide bearings are used for linear reciprocating sliding of parts on the track; such as the application number 201510022786.1 disclosed in the Chinese patent literature, the authorization announcement date is 2017.02.22, and the invention name is "Guide Slider Bearing and Its Processing Technology". However, the above-mentioned products and similar products are noisy, and rarely use a set of plane bearings on each side to clamp the needle roller plane bearing in the outer ring. Its stability needs to be further improved, and the axial load and radial load need to be increased. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the utility model is to provide a guide rail bearing with a combination of needle roller and plane bearings in the art, so as to solve the technical problems of the existing similar products, such as high noise, less use of a set of plane bearings on each side to clamp the needle roller plane bearings in the outer ring, and further improvement of its stability, and increase of axial load and radial load. The purpose is achieved through the following technical solutions.

[0004] A guide rail bearing with a combination of needle roller and plane bearings, a needle roller plane bearing assembly is fixedly arranged at one end of the fixing pin of the guide rail bearing; the key points of its structural design are that the needle roller plane bearing assembly includes a first plane bearing, a needle roller bearing, a second plane bearing and an outer ring, the needle roller bearing is arranged in the middle of the inner diameter of the outer ring, the inner diameter of the outer ring is symmetrically provided with step grooves on both sides, the first plane bearing and the second plane bearing are symmetrically arranged in the step grooves on both sides of the outer ring, the first plane bearing, the needle roller bearing, the second plane bearing and the outer ring are connected as a whole and fixed to one end of the fixing pin through the connecting screw of the fixing pin, and the other end of the fixing pin is provided with an internal thread or an external thread. Thus, the guide rail bearing increases the axial load and radial load, improves its stability and reduces noise.

[0005] The first plane bearing and the second plane bearing are respectively provided with cylindrical rollers or steel balls which are equidistantly distributed in a circular shape.

[0006] The needle roller plane bearing assembly is fixed to the fixing pin through a limiting ring at the fixing pin on one side of the first plane bearing in cooperation with a connecting screw, or the protrusion at the limiting ring is replaced with a limiting hexagonal nut or a clamp in cooperation with a connecting screw to fix to the fixing pin, or is directly fixed to the T-shaped fixing pin. This ensures that the first plane bearing, the needle roller bearing, and the second plane bearing are fixedly installed on the fixing pin.

[0007] The connecting screw at the fixing pin on one side of the second plane bearing is connected and fixed to the fixing pin through a fixing cover. The above is a structural embodiment of fixing the fixing cover and the connecting screw to the fixing pin.

[0008] The outer shell of the needle roller bearing is interference-set in the groove at the middle of the inner diameter of the outer ring, and the inner diameter of the needle roller bearing is sleeved and fits the outer diameter of the fixing pin.

[0009] The central axis of the fixing pin is eccentrically arranged with respect to the central axis of the connecting screw, so that the eccentric position can be adjusted easily by the eccentrically arranged connecting screw.

[0010] The outer diameters of the first plane bearing, the needle bearing and the second plane bearing of the fixing pin are increased in a step-by-step manner. The above structure facilitates the step-by-step installation and fixing of the first plane bearing, the needle bearing and the second plane bearing.

[0011] The first plane bearing of the fixing pin is provided with a sleeve on the outer diameter of the fixing pin, and the first plane bearing is on the same horizontal axis as the second plane bearing through the sleeve. The above structure further improves the stability of the first plane bearing, the needle bearing and the second plane bearing installed in a stepped manner.

[0012] A V-shaped or arc-shaped groove is arranged in the middle of the outer ring, and an oil groove is arranged at the bottom of the groove.

[0013] The utility model has reasonable structural design, convenient production, use and installation, good stability, low noise, various structural forms and long service life, and especially improved axial load and radial load; it is suitable for use as a guide bearing of a combination of needle roller and plane bearings, and is a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional structural schematic diagram of the first embodiment of the utility model.

[0015] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure.

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the second embodiment of the utility model.

[0017] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure.

[0018] Figure 5 It is a schematic cross-sectional structural diagram of embodiment 3 of the present utility model.

[0019] Figure 6 It is a schematic cross-sectional structural diagram of embodiment 4 of the present utility model.

[0020] Serial numbers and names of the accompanying drawings: 1. Fixing pin, 2. First plane bearing, 3. Needle roller bearing, 4. Second plane bearing, 5. Fixing cover, 6. Connecting screws, 7. Outer ring, 8. Limiting hexagonal nut, 9. Clamp, 10. Sleeve. Implementation

[0021] Now, in conjunction with the accompanying drawings, the structure and use of the utility model are further described. Figure 1-Figure 6 As shown, a needle roller plane bearing assembly is fixedly arranged at one end of the fixing pin 1 of the guide rail bearing; the needle roller plane bearing assembly comprises a first plane bearing 2, a needle roller bearing 3, a second plane bearing 4 and an outer ring 7, the needle roller bearing is arranged in the middle of the inner diameter of the outer ring, and step grooves are symmetrically arranged on both sides of the inner diameter of the outer ring, the first plane bearing and the second plane bearing are symmetrically arranged in the step grooves on both sides of the outer ring, the first plane bearing, the needle roller bearing, the second plane bearing and the outer ring are connected as a whole and fixed to one end of the fixing pin by the connecting screw 6 of the fixing pin, or the connecting screw is fixed to the fixing pin by the fixing cover 5, and the other end of the fixing pin is provided with an internal thread or an external thread. A V-shaped or arc-shaped groove is arranged in the middle of the outer ring, and an oil groove is arranged at the bottom of the groove.

[0022] The first plane bearing and the second plane bearing are respectively provided with cylindrical rollers or steel balls distributed in a circular pattern and at equal intervals; the needle roller plane bearing assembly is fixed to the fixing pin through a limit ring at the fixing pin on one side of the first plane bearing and a connecting screw. Figure 3-Figure 4 The second embodiment shown, and Figure 5 In the third embodiment shown, the protrusion at the limit ring is replaced by a limit hexagonal nut 8 or a clamp 9 which is fixed to the fixing pin in cooperation with the connecting screw, or is directly fixed to the T-shaped fixing pin; the outer shell of the needle roller bearing is interference-set in the groove in the middle of the inner diameter of the outer ring, and the inner diameter of the needle roller bearing is inserted into the outer diameter of the fixing pin.

[0023] The central axis of the fixing pin is eccentrically arranged with respect to the central axis of the connecting screw; Figure 6 In the fourth embodiment shown, the outer diameters of the first plane bearing, the needle bearing and the second plane bearing of the fixing pin are increased in steps. At the same time, a sleeve 10 is provided on the outer diameter of the fixing pin at the first plane bearing of the fixing pin, and the first plane bearing is on the same horizontal axis with the second plane bearing through the sleeve.

[0024] In summary, the guide bearing has a step groove on each of the two planes of the outer ring of the bearing, a plane bearing is installed in each step groove, and a needle bearing is installed in the outer ring hole. The middle of the fixing pin is convex, and the A head at one end of the fixing pin is provided with an internal thread or an external thread, with centering and eccentricity, and is fixed on the small slider; the B head at the other end of the fixing pin is provided with an internal thread, and the outer diameter is matched with the inner hole of the needle bearing with a small amount of clearance, with centering and eccentricity. The fixing cover is provided with an inner hole, a large flat surface attached to one end of the plane bearing, and a small outer circle. The end face of the small outer circle is attached to the end face of the B head of the fixing pin, and the length of the small outer circle is controlled according to the axial clearance requirements. Finally, the two plane bearings are locked by connecting the internal thread of the B head of the fixing pin through the inner hole of the fixing cover with a connecting screw. The guide bearing composed of the above-mentioned needle roller and plane bearings has increased axial load and radial load compared with ordinary guide bearings.

Claims

1. A guide rail bearing composed of a needle roller and a plane bearing, wherein a needle roller and a plane bearing assembly is fixedly provided at one end of a fixing pin (1) of the guide rail bearing; characterized in that The needle roller plane bearing assembly comprises a first plane bearing (2), a needle roller bearing (3), a second plane bearing (4) and an outer ring (7), wherein the needle roller bearing is arranged in the middle of the inner diameter of the outer ring, step grooves are symmetrically arranged on both sides of the inner diameter of the outer ring, the first plane bearing and the second plane bearing are symmetrically arranged in the step grooves on both sides of the outer ring, the first plane bearing, the needle roller bearing, the second plane bearing and the outer ring are connected as a whole and are fixed to one end of the fixing pin by a connecting screw (6) of the fixing pin (1), and the other end of the fixing pin is provided with an internal thread or an external thread.

2. The guide rail bearing of the combination of needle roller bearing and plane bearing according to claim 1, characterized in that The first plane bearing (2) and the second plane bearing (4) are respectively provided with cylindrical rollers or steel balls which are distributed in a circular and equidistant manner.

3. The guide rail bearing of the combination of needle roller bearing and plane bearing according to claim 1, characterized in that The needle roller plane bearing assembly is fixed to the fixing pin through a limiting ring at the fixing pin (1) on one side of the first plane bearing (2) in cooperation with a connecting screw (6), or the protrusion at the limiting ring is replaced with a limiting hexagonal nut (8) or a clamp (9) in cooperation with a connecting screw to fix to the fixing pin, or is directly fixed to a T-shaped fixing pin.

4. The guide rail bearing of the combination of needle roller and plane bearings according to claim 1, characterized in that A connecting screw (6) at a fixing pin (1) on one side of the second plane bearing (4) is connected and fixed to the fixing pin via a fixing cover (5).

5. The guide rail bearing of the combination of needle roller and plane bearings according to claim 1, characterized in that The outer shell of the needle roller bearing (3) is interference-fitted into a groove in the middle of the inner diameter of the outer ring (7), and the inner diameter of the needle roller bearing is sleeved and fits into the outer diameter of the fixing pin (1).

6. The guide rail bearing of the combination of needle roller and plane bearings according to claim 1, characterized in that The central axis of the fixing pin (1) and the central axis of the connecting screw (6) are eccentrically arranged.

7. The guide rail bearing of the combination of needle roller and plane bearings according to claim 1, characterized in that The outer diameters of the first plane bearing (2), the needle bearing (3) and the second plane bearing (4) of the fixing pin (1) are increased in a step-like manner.

8. The guide rail bearing of the combination of needle roller bearing and plane bearing according to claim 7, characterized in that A bushing (10) is provided on the outer diameter of the fixing pin at the first plane bearing (2) of the fixing pin (1), and the first plane bearing is located on the same horizontal axis as the second plane bearing (4) through the bushing.

9. The guide rail bearing of the combination of needle roller and plane bearings according to claim 1, characterized in that A V-shaped or arc-shaped groove is provided in the middle of the outer ring (7), and an oil groove is provided at the bottom of the groove.

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