Bearing positioning structure of electric grinder

Abstract

The utility model relates to the field of electric grinders, in particular to a bearing positioning structure of an electric grinder, which comprises an axle box, an output shaft, a rear bearing, a front bearing, a retainer ring for a rear shaft, a retainer ring for a front shaft, a bearing gland, a sleeve and an elastic compression component. The rear bearing is arranged at the rear end of the output shaft and fixed to the rear end face through the rear shaft check ring, the rear bearing is arranged close to a step at a bearing hole, the front bearing is arranged at the front end of the output shaft and fixed to the rear end face through the front shaft check ring, and the sleeve is located in the shaft box and arranged between the rear bearing and the front bearing. The bearing gland is screwed into the axle box in a threaded mode and presses the outer ring of the front bearing, the elastic pressing assembly is clamped in the axle box and located on the front side of the front bearing, the supporting performance of the axle box on the output shaft and the reliability of the bearing are improved, and the service life of the whole machine is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of electric grinders, in particular to a bearing positioning structure of an electric grinder. Background Art

[0002] The output shaft of the existing electric grinder is mostly installed into the axle box from the back to the front and fixed at the tail to compress the bearing. In the current scheme, when the machine is working, the output shaft will be subjected to axial force. Since the limit step is in the front and the locking structure is in the back, the locking thread is easy to loosen under the vibration of the axle box and the backward axial force, resulting in insufficient compression force of the bearing. The bearing can move slightly in the axle box, which is not conducive to the bearing supporting the output shaft and is prone to failure. Therefore, in order to solve the deficiencies in the existing technology, a simple-structured electric grinder bearing positioning structure needs to be designed. Utility Model Content

[0003] The utility model provides a bearing positioning structure for an electric grinder to solve the problems of the prior art.

[0004] The purpose of the utility model can be achieved through the following technical solutions: a bearing positioning structure of an electric grinder includes: an axle box, an output shaft, a rear bearing, a front bearing, a retaining ring for the rear shaft, a retaining ring for the front shaft, a bearing cover, a sleeve and an elastic clamping assembly, the rear end of the output shaft is arranged in the axle box, and a step is provided at the bearing hole on the right side of the axle box, the rear bearing is arranged at the rear end of the output shaft and the rear end face is fixed by the retaining ring for the rear shaft, the rear bearing is arranged close to the step at the bearing hole, the front bearing is arranged at the front end of the output shaft and the rear end face is fixed by the retaining ring for the front shaft, the sleeve is located in the axle box and placed between the rear bearing and the front bearing, the bearing cover is threaded into the interior of the axle box and presses the outer ring of the front bearing, and the elastic clamping assembly is clamped in the axle box and located on the front side of the front bearing.

[0005] As a further improvement, the elastic clamping assembly includes an elastic corrugated retaining ring and an elastic retaining ring for a hole, wherein the elastic retaining ring for the hole is disposed at the front side of the elastic corrugated retaining ring, and the elastic retaining ring for the hole is clamped in a groove of the axle box.

[0006] As a further improvement, an annular groove is provided on the rear side of the bearing cover, and a gasket is provided in the annular groove.

[0007] As a further improvement, a straight groove is provided on the bearing cover.

[0008] Compared with the prior art, the bearing positioning structure of the electric grinder of the utility model has the following beneficial effects:

[0009] The threaded bearing cover is screwed into the bearing to press the front bearing outer ring. The two bearing outer rings are tightly fixed in the axle box under the pressure of the bearing cover and the support of the sleeve. The rear bearing is supported by a rigid step at the bearing hole, and is combined with an elastic corrugated gasket at the front end and an elastic retaining ring for the hole. This solves the problem that the clamping structure of the electric grinder is easily loosened due to vibration and backward axial force after long-term use, resulting in insufficient bearing clamping force and premature bearing failure. This improves the support of the axle box to the output shaft, the reliability of the bearing, and the life of the entire machine, making it more competitive in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of the utility model

[0011] Figure 2 This is a structural diagram of the bearing gland position 1 in the utility model

[0012] Figure 3 This is a structural diagram of the bearing gland position 2 in the utility model

[0013] In the figure, 1-axle box, 11-step at the bearing hole, 12-groove, 2-output shaft, 3-rear bearing, 4-front bearing, 5-rear axle retaining ring, 6-front axle retaining ring, 7-bearing cover, 71-slot, 72-annular groove, 73-washer, 8-sleeve, 9-elastic clamping assembly, 91-elastic corrugated retaining ring, 92-elastic retaining ring for hole. DETAILED DESCRIPTION

[0014] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0015] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] Below is a combination of the embodiments and the attached Figures 1 to 3 , the technical solution of the utility model is further elaborated.

[0017] Example 1

[0018] A bearing positioning structure of an electric grinder, comprising: an axle box 1, an output shaft 2, a rear bearing 3, a front bearing 4, a rear axle retaining ring 5, a front axle retaining ring 6, a bearing pressure cover 7, a sleeve 8 and an elastic clamping component 9, wherein the rear end of the output shaft 2 is arranged in the axle box 1, and a step 11 at the bearing hole is provided on the right side of the axle box 1, the rear bearing 3 is arranged at the rear end of the output shaft 2 and the rear end face is fixed by the rear axle retaining ring 5, the rear bearing 3 is arranged close to the step 11 at the bearing hole, the front bearing 4 is arranged at the front end of the output shaft 2 and the rear end face is fixed by the front axle retaining ring 6, the sleeve 8 is located in the axle box 1 and is placed between the rear bearing 3 and the front bearing 4, the bearing pressure cover 7 is screwed into the interior of the axle box 1 and presses the outer ring of the front bearing 4, and the elastic clamping component 9 is clamped in the axle box 1 and is located on the front side of the front bearing 4.

[0019] As a further preferred embodiment, the elastic clamping assembly 9 includes an elastic corrugated retaining ring 91 and an elastic retaining ring for a hole 92 , wherein the elastic retaining ring for a hole 92 is disposed at the front side of the elastic corrugated retaining ring 91 , and the elastic retaining ring for a hole 92 is clamped in the groove 12 of the axle box 1 .

[0020] As a further preferred embodiment, an annular groove 72 is provided on the rear side of the bearing cover 7, and a gasket 73 is provided in the annular groove 72, so that the preload stability is increased by the gasket 73.

[0021] As a further preferred embodiment, the bearing cover 7 is provided with a straight groove 71 to facilitate screwing in and out of the bearing cover 7 .

[0022] like Figure 1 to Figure 3 As shown, the use principle of the utility model is: during the assembly process of the product, the rear bearing 3 is pressed to the bearing position of the output shaft 2 and fixed at the rear end face with the rear shaft retaining ring 5, the outer ring is supported by the sleeve 8 between the rear bearing 3 and the front bearing 4, and then the output shaft 2 equipped with the rear bearing 3 is pressed in from the front end of the axle box 1 until the outer ring of the rear bearing 3 contacts the step 11 at the bearing hole at the rear end of the axle box 1, and then the threaded bearing cover 7 is screwed in to tighten the outer ring of the front bearing 4. At this time, the outer rings of the two bearings are tightly fixed in the axle box 1 under the pressure of the bearing cover 7 and the support of the sleeve 8, and an elastic corrugated washer 91 and an elastic retaining ring 92 for the hole are added at the front end to further increase stability and prevent the bearing cover 7 from loosening during operation.

[0023] When the machine is working, the output shaft 2 will receive an upward force, and there will be a backward force in the axial direction. At this time, the backward axial force will be transmitted by the bearing and sleeve to the step 11 at the bearing hole on the axle box. Since this step provides rigid support for the bearing, the problem of loosening of the rear-end clamping structure is avoided. When the machine is working, the output shaft 2 will rotate at high speed, and the main machine will have high-frequency vibration. After the outer ring of the bearing is pressed by the threaded bearing gland 7, in order to prevent the thread from loosening, the outer elastic wave washer and the hole elastic retaining ring will continue to apply downward pressure to the bearing gland to prevent the bearing from shaking due to insufficient gland clamping force; it ensures that the outer ring of the bearing is tightly fixed in the axle box to provide better support for the output shaft and avoid premature failure caused by bearing movement.

[0024] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A bearing positioning structure for an electric grinder, characterized in that: include: An axle box, an output shaft, a rear bearing, a front bearing, a retaining ring for the rear shaft, a retaining ring for the front shaft, a bearing cover, a sleeve and an elastic clamping assembly. The rear end of the output shaft is arranged in the axle box, and a step is provided at the bearing hole on the right side of the axle box. The rear bearing is arranged at the rear end of the output shaft and the rear end face is fixed by a retaining ring for the rear shaft. The rear bearing is arranged close to the step at the bearing hole, the front bearing is arranged at the front end of the output shaft and the rear end face is fixed by a retaining ring for the front shaft. The sleeve is located in the axle box and placed between the rear bearing and the front bearing. The bearing cover is threaded into the interior of the axle box and presses the outer ring of the front bearing. The elastic clamping assembly is clamped in the axle box and is located on the front side of the front bearing.

2. The bearing positioning structure of an electric grinder according to claim 1, characterized in that: The elastic clamping assembly comprises an elastic corrugated retaining ring and an elastic retaining ring for a hole. The elastic retaining ring for the hole is arranged at the front side of the elastic corrugated retaining ring, and the elastic retaining ring for the hole is clamped in the groove of the axle box.

3. The bearing positioning structure of an electric grinder according to claim 1, characterized in that: An annular groove is arranged at the rear side of the bearing gland, and a gasket is arranged in the annular groove.

4. The bearing positioning structure of an electric grinder according to claim 1, characterized in that: The bearing cover is provided with a slot.

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