Auxiliary tool for grease injection of roller and needle bearing

Abstract

The utility model discloses an auxiliary tool for grease injection of a roller needle bearing, the roller needle bearing comprises an outer ring, an inner ring, and a plurality of needle rollers and a bearing retainer ring assembly which are arranged between the outer ring and the inner ring, and the bearing retainer ring assembly comprises a first bearing retainer ring and a second bearing retainer ring which are arranged at two axial ends of the inner ring; the auxiliary tool comprises a grease injection shaft, the grease injection shaft is arranged in the inner ring in a penetrating mode and abuts against the first bearing check ring, a grease injection channel communicated with the grease inlet channel is formed in the grease injection shaft, and a grease injection opening communicated with the grease injection channel is formed in the end, away from the first bearing check ring, of the grease injection shaft; and the fixing nut is used for fixing the grease injection shaft on the inner ring, and the fixing nut is in threaded connection with the grease injection shaft and abuts against the second bearing check ring. According to the auxiliary tool for grease injection of the roller needle bearing, the grease injection efficiency can be improved, and the lubricating effect of a bearing is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing technical field, especially a kind of auxiliary tool for grease injection of roller needle bearing. BACKGROUND

[0002] In conventional roller needle bearing assembly, operator will generally manually spread lubricating grease evenly in bearing interior, to complete bearing assembly, manually grease injection is inefficient, and cannot guarantee that grease enters bearing, and bearing lubrication effect cannot be judged. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a kind of auxiliary tool for grease injection of roller needle bearing, improve bearing grease injection efficiency, guarantee bearing lubrication effect.

[0004] Based on the above problems, the technical scheme provided by the utility model is:

[0005] The auxiliary tool for grease injection of roller needle bearing, the roller needle bearing includes outer ring, inner ring and multiple needle and bearing retainer assembly arranged between the outer ring and the inner ring, the bearing retainer assembly includes first bearing retainer and second bearing retainer arranged at the axial both ends of the inner ring, the inner ring is equipped with multiple grease injection channels communicated to the needle in radial direction, and the auxiliary tool includes:

[0006] Grease injection shaft, which is arranged in the inner ring and abuts against the first bearing retainer, the grease injection shaft is equipped with grease injection channel communicated to the grease injection channel, and the end of the grease injection shaft away from the first bearing retainer is equipped with grease injection port communicated to the grease injection channel;

[0007] Fixed nut, which is used to fix the grease injection shaft on the inner ring, the fixed nut is threadedly connected with the grease injection shaft and abuts against the second bearing retainer.

[0008] In some embodiments, the grease injection shaft includes fixed part, light pole part and threaded part connected in sequence along axial direction, the fixed part abuts against the first bearing retainer, the fixed nut is threadedly connected with the threaded part, and the grease injection port is arranged at the end of the threaded part.

[0009] In some embodiments, the grease injection channel includes main channel extending from the threaded part to the light pole part and multiple branch channels arranged radially along the light pole part, and the multiple branch channels communicate the multiple grease injection channels with the main channel.

[0010] In some embodiments, gasket is arranged between the fixed part and the first bearing retainer.

[0011] In some of the embodiments, the outer diameter of the gasket is greater than or equal to the diameter of the middle circle of the first bearing retainer.

[0012] In some of the embodiments, the outer diameter of the fixed nut is greater than or equal to the diameter of the middle circle of the second bearing retainer.

[0013] In some of the embodiments, the outer periphery of the fixed portion is provided with two first planar cutting portions arranged oppositely.

[0014] In some of the embodiments, the outer periphery of the fixed nut is provided with two second planar cutting portions arranged oppositely.

[0015] The middle circle in the above technical solution refers to a virtual circle at the middle position of the circular ring.

[0016] Compared with the prior art, the utility model has the advantages of:

[0017] (1) The grease injection channel is injected with grease through the grease injection port, and then the grease enters the bearing interior through the grease inlet channel of the inner ring, so that the bearing can be fully lubricated, the lubrication effect of the bearing is ensured, and the production efficiency is improved.

[0018] (2) The structure of the grease injection shaft can ensure the sealing performance between the grease injection shaft and the bearing, and improve the grease injection effect.

[0019] (3) The gasket arranged between the grease injection shaft and the first bearing retainer can further ensure the air tightness between the grease injection shaft and the bearing, avoid the grease from leaking out of the grease injection shaft, and improve the grease injection effect.

[0020] (4) The diameter of the gasket / fixed nut is set according to the size of the first bearing retainer / second bearing retainer, so that the bearing retainer assembly is prevented from being pulled out during the grease injection, and the stability of the bearing structure during the grease injection is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0022] Figure 1 It is a structure schematic view of the auxiliary tooling embodiment of the utility model for the grease injection of the roller needle bearing.

[0023] Figure 2 It is a sectional structure schematic view of the grease injection shaft in the embodiment of the utility model.

[0024] Figure 3 It is a top view of the grease injection shaft in the embodiment of the utility model.

[0025] Figure 4 This is a schematic diagram of the structure of the fixing nut in an embodiment of this utility model;

[0026] in:

[0027] 100. Outer ring;

[0028] 200. Inner ring; 201. Fat inlet channel;

[0029] 300. First bearing retaining ring;

[0030] 400. Second bearing retaining ring;

[0031] 500. Bearing seal ring;

[0032] 600, needle roller;

[0033] 1. Grease injection shaft; 1-1. Fixing part; 1-1a. First plane cutting part; 1-2. Polished part; 1-3. Threaded part; 1-4. Grease injection port; 1-5. Main channel; 1-6. Branch channel;

[0034] 2. Fixing nut; 2-1. Second plane cutting part;

[0035] 3. Washers. Detailed Implementation

[0036] The above solution will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrating the present invention and are not intended to limit the scope of the present invention. The implementation conditions used in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0037] like Figure 1 As shown in the figure, an embodiment of the present invention is provided, which provides an auxiliary tooling for grease injection of roller needle bearings. The roller needle bearing includes an outer ring 100, an inner ring 200, and a plurality of needle rollers 600 and a bearing retainer assembly disposed between the outer ring 100 and the inner ring 200. The bearing retainer assembly includes a first bearing retainer 300 and a second bearing retainer 400 arranged at both ends of the axial direction of the inner ring 200. Bearing seals 500 are respectively provided between the first bearing retainer 300, the second bearing retainer 400 and the outer ring 100. A plurality of grease inlet channels 201 communicating with the needle rollers 600 are provided in the radial direction of the inner ring 200.

[0038] The auxiliary tooling includes a grease injection shaft 1 and a fixing nut 2 that locks the grease injection shaft 1 onto the roller needle bearing.

[0039] The grease injection shaft 1 is arranged in the inner ring 200 and abuts against the first bearing retainer 300. A grease injection channel is arranged in the grease injection shaft 1 and communicates with the grease injection channels 201. A grease injection opening 1-4 is arranged at the end of the grease injection shaft 1 away from the first bearing retainer 300. The fixing nut 2 is threadedly connected with the grease injection shaft 1 and abuts against the second bearing retainer 400.

[0040] As shown in Figure 2 The grease injection shaft 1 comprises a fixing portion 1-1, a light pole portion 1-2 and a threaded portion 1-3 connected in sequence along the axial direction. The outer diameters of the fixing portion 1-1, the light pole portion 1-2 and the threaded portion 1-3 are gradually reduced. The fixing portion 1-1 abuts against the first bearing retainer 300. The fixing nut 2 is threadedly connected with the threaded portion 1-3. The grease injection opening 1-4 is arranged at the end of the threaded portion 1-3.

[0041] In order to improve the air tightness between the grease injection shaft 1 and the bearing and avoid the grease flowing out from the gap between the fixing portion 1-1 and the bearing, a gasket 3 is arranged between the fixing portion 1-1 and the first bearing retainer 300. The gasket 3 is arranged at the lower part of the light pole portion 1-2. The length of the light pole portion 1-2 is slightly smaller than the sum of the axial lengths of the bearing and the gasket 3, so as to ensure that the fixing nut 2 is screwed and abuts against the second bearing retainer 400.

[0042] In order to avoid the abrasion of the bearing, the above-mentioned grease injection shaft 1, the fixing nut 2 and the gasket 3 are all made of brass with small hardness.

[0043] In order to avoid the first bearing retainer 300 and the second bearing retainer 400 from being pulled out during the grease injection and the grease from flowing out from the light pole portion 1-2 and failing to enter the bearing, the outer diameter of the gasket 3 is greater than or equal to the diameter of the middle circle (the virtual circle at the middle position of the circular ring) of the first bearing retainer 300. The outer diameter of the fixing nut 2 is greater than or equal to the diameter of the middle circle of the second bearing retainer 400, i.e. the gasket 3 can abut against the middle position of the first bearing retainer 300 and the fixing nut 2 can abut against the middle position of the second bearing retainer 400.

[0044] The grease injection channel comprises a main channel 1-5 extending from the threaded portion 1-3 to the light pole portion 1-2 and a plurality of branch channels 1-6 arranged radially along the light pole portion 1-2. The plurality of branch channels 1-6 communicate the plurality of grease injection channels 201 with the main channel 1-5. The grease injected through the grease injection opening 1-4 can enter the inside of the bearing through the main channel 1-5, the branch channels 1-6 and the grease injection channels 201.

[0045] As shown in Figure 3 In order to facilitate the fixing of the auxiliary tool on the bench vice for the grease injection operation, two first planar cutting portions 1-1a are arranged at the outer periphery of the fixing portion 1-1.

[0046] As shown in Figure 4As shown, in order to facilitate the operation of the fixing nut 2, the outer periphery of the fixing nut 2 is provided with two second planar cutting parts 2-1 arranged oppositely.

[0047] The working principle of the utility model is:

[0048] The fixed part 1-1 of the grease injection shaft 1 is clamped on the vice, the gasket 3 is sleeved on the lower part of the polished rod part 1-2 and abuts against the fixed part 1-1, the inner ring 200 of the roller needle bearing is sleeved on the outer periphery of the polished rod part 1-2 and is located above the gasket 3, then the fixing nut 2 is screwed on the threaded part 1-3 and abuts against the second bearing retainer 400, at this time, the gasket 3 abuts against the first bearing retainer 300, finally, the grease injection port of the threaded part 1-3 injects grease into the grease injection channel, when grease overflows at the bearing sealing ring 500, the grease injection is completed.

[0049] In summary, the auxiliary tooling has simple structure, is convenient to install, can improve the grease injection efficiency and ensure the lubricating effect of the bearing.

[0050] The above examples are only for illustrating the technical concept and characteristics of the utility model, the purpose is to enable the person skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model. Any equivalent transformation or modification according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.

Claims

1. An auxiliary tool for grease injection of a roller needle bearing, the roller needle bearing comprising an outer ring, an inner ring, and a plurality of needles and a bearing retainer assembly disposed between the outer ring and the inner ring, the bearing retainer assembly comprising a first bearing retainer and a second bearing retainer arranged at axial both ends of the inner ring, the inner ring being provided with a plurality of grease injection passages communicating to the needles in a radial direction, characterized in that, The auxiliary tooling includes: A grease injection shaft is arranged in the inner ring and abuts against the first bearing retainer, and the grease injection shaft is internally provided with a grease injection channel communicated with the grease injection channels, and an end of the grease injection shaft away from the first bearing retainer is provided with a grease injection port communicated with the grease injection channel; A fixing nut is used for fixing the grease injection shaft on the inner ring, and the fixing nut is threadedly connected with the grease injection shaft and abuts against the second bearing retainer.

2. The auxiliary tool for grease injection of a roller needle bearing according to claim 1, characterized in that: The grease injection shaft includes a fixing portion, a polished rod portion and a threaded portion connected in sequence in the axial direction, the fixing portion abuts against the first bearing retainer, the fixing nut is threadedly connected with the threaded portion, and the grease injection port is arranged at an end of the threaded portion.

3. The auxiliary tool for grease injection of a roller needle bearing according to claim 2, characterized in that: The grease injection channel includes a main channel extending from the threaded portion to the polished rod portion and a plurality of branch channels arranged in the radial direction of the polished rod portion, and the plurality of branch channels communicate the plurality of grease injection channels with the main channel.

4. The auxiliary tool for grease injection of a roller needle bearing according to claim 2, characterized in that: A gasket is arranged between the fixing portion and the first bearing retainer.

5. The auxiliary tool for grease injection of a roller needle bearing according to claim 4, characterized in that: An outer diameter of the gasket is greater than or equal to a diameter of the middle circle of the first bearing retainer.

6. The auxiliary tool for grease injection of a roller needle bearing according to claim 5, characterized in that: An outer diameter of the fixing nut is greater than or equal to a diameter of the middle circle of the second bearing retainer.

7. The auxiliary tool for grease injection of a roller needle bearing according to claim 2, characterized in that: An outer periphery of the fixing portion is provided with two first planar cutting portions arranged oppositely.

8. The auxiliary tool for grease injection of a roller needle bearing according to claim 1, characterized in that: An outer periphery of the fixing nut is provided with two second planar cutting portions arranged oppositely.

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