阅读说明：本技术 一种轴承组件单元及电锤 (Bearing assembly unit and electric hammer ) 是由 王乃明 于 2020-07-20 设计创作，主要内容包括：本发明所公开了一种轴承组件单元,包括轴承外圈和轴承内圈,轴承外圈的高度高于轴承内圈的高度,轴承外圈的内壁设置有外圈沟道,轴承内圈的外壁设置有内圈沟道,外圈沟道和内圈沟道相对包合而成轴承沟道；轴承外圈和轴承内圈之间设置有保持架,保持架上设置有若干滚珠,滚珠可滚动的保持于轴承沟道上。由于轴承外圈的高度增加,替代了现有技术的粉末冶金壳体,因此轴承制造精度能够大幅度提升,有效提高了轴承的装配效率,另外由于轴承组件单元与轴的接触方式为点接触,相对比于现有技术摩擦力减小,大大降低了电锤工作时的冲击和振动,从而有效降低了电锤工作时的温度,提高了电锤的使用寿命。(The invention discloses a bearing assembly unit, which comprises a bearing outer ring and a bearing inner ring, wherein the height of the bearing outer ring is higher than that of the bearing inner ring; a retainer is arranged between the bearing outer ring and the bearing inner ring, a plurality of balls are arranged on the retainer, and the balls can be kept on the bearing channel in a rolling manner. Because the high increase of bearing inner race has replaced prior art's powder metallurgy casing, therefore bearing manufacturing accuracy can promote by a wide margin, has effectively improved the assembly efficiency of bearing, because the contact mode of bearing subassembly unit and axle is the point contact in addition, reduces compared with prior art frictional force, greatly reduced the impact and the vibration of electric hammer during operation to effectively reduced the temperature of electric hammer during operation, improved the life of electric hammer.)

1. The bearing assembly unit is characterized by comprising a bearing outer ring (1) and a bearing inner ring (2), wherein the height of the bearing outer ring (1) is higher than that of the bearing inner ring (2), an outer ring channel is arranged on the inner wall of the bearing outer ring (1), an inner ring channel is arranged on the outer wall of the bearing inner ring (2), and the outer ring channel and the inner ring channel are oppositely included to form a bearing channel (3);

a retainer (4) is arranged between the bearing outer ring (1) and the bearing inner ring (2), a plurality of balls (5) are arranged on the retainer (4), and the balls (5) can be kept on the bearing channel (3) in a rolling manner.

2. Bearing assembly unit according to claim 1, characterized in that the bearing cup (1) comprises two oppositely arranged side faces, the bearing cup (1) extending in height in the direction of one of the side faces.

3. Bearing assembly unit according to claim 1, wherein the inner wall of the bearing outer ring (1) is further provided with a boss (6) for clamping the bearing inner ring (2).

4. Bearing assembly unit according to claim 1, wherein the cage (4) is made of a nylon material.

5. The bearing assembly unit of claim 1, wherein the inner race channel and the outer race channel are both offset grooves.

6. An electric hammer comprising a bearing assembly unit, characterized in that the bearing assembly unit is a bearing assembly unit according to any one of claims 1-5.

Technical Field

The invention relates to the technical field of bearings, in particular to a bearing assembly unit and an electric hammer.

Background

Electric hammers are a class of electric drills used primarily for drilling holes in concrete, floor slabs, brick walls and stone. Because the electric hammer output shell space is limited, the bearing in the electric hammer generally adopts a needle bearing, when the bearing is assembled, the whole needle bearing needs to be pressed into the powder metallurgy machine shell in an interference manner, because the wall thickness of the needle bearing is ultrathin, the rigidity is weaker, meanwhile, the manufacturing precision of the powder metallurgy shell is poorer, after the needle bearing is pressed into the powder metallurgy shell in the interference manner, a bearing roller way is seriously deformed, so that the bearing precision is completely destroyed, in addition, because the needle bearing is in line contact with the shaft during the matching work, the friction is larger, therefore, greater impact and vibration can be generated when the electric hammer works, so that the temperature of the electric hammer is higher during the work, and the service life is unstable.

Therefore, how to improve the assembly efficiency of the bearing, reduce the temperature of the electric hammer during operation, and improve the service life of the electric hammer is a technical problem that needs to be solved urgently by those skilled in the art.

Disclosure of Invention

In view of this, the present invention provides a bearing assembly unit, which can improve the assembly efficiency of the bearing, effectively reduce the temperature of the electric hammer during operation, and improve the service life of the electric hammer.

Another object of the present invention is to provide an electric hammer.

In order to achieve the purpose, the invention provides the following technical scheme:

a bearing assembly unit comprises a bearing outer ring and a bearing inner ring, wherein the height of the bearing outer ring is higher than that of the bearing inner ring, an outer ring channel is arranged on the inner wall of the bearing outer ring, an inner ring channel is arranged on the outer wall of the bearing inner ring, and the outer ring channel and the inner ring channel are oppositely included to form a bearing channel;

and a retainer is arranged between the bearing outer ring and the bearing inner ring, a plurality of balls are arranged on the retainer, and the balls can be kept on the bearing channel in a rolling manner.

Preferably, the bearing outer ring comprises two oppositely arranged side surfaces, and the height of the bearing outer ring extends towards the direction of one of the side surfaces.

Preferably, the inner wall of the bearing outer ring is also provided with a boss for clamping the bearing inner ring.

Preferably, the retainer is made of nylon material.

Preferably, the inner ring channel and the outer ring channel are offset grooves.

An electric hammer comprising a bearing assembly unit as claimed in any preceding claim.

According to the technical scheme, the bearing assembly unit comprises a bearing outer ring and a bearing inner ring, wherein the height of the bearing outer ring is higher than that of the bearing inner ring, an outer ring channel is arranged on the inner wall of the bearing outer ring, an inner ring channel is arranged on the outer wall of the bearing inner ring, and the outer ring channel and the inner ring channel are oppositely included to form the bearing channel; a retainer is arranged between the bearing outer ring and the bearing inner ring, a plurality of balls are arranged on the retainer, and the balls can be kept on the bearing channel in a rolling manner. Because the high increase of bearing inner race has replaced prior art's powder metallurgy casing, therefore bearing manufacturing accuracy can promote by a wide margin, has effectively improved the assembly efficiency of bearing, because the contact mode of bearing subassembly unit and axle is the point contact in addition, reduces compared with prior art frictional force, greatly reduced the impact and the vibration of electric hammer during operation to effectively reduced the temperature of electric hammer during operation, improved the life of electric hammer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of a bearing assembly unit disclosed in an embodiment of the present invention.

Wherein, each part name is as follows:

1-bearing outer ring, 2-bearing inner ring, 3-bearing channel, 4-retainer, 5-ball and 6-boss.

Detailed Description

In view of the above, the core of the present invention is to provide a bearing assembly unit, which can improve the assembly efficiency of a bearing, effectively reduce the temperature of an electric hammer during operation, and improve the service life of the electric hammer.

The invention also provides an electric hammer.

In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings and the detailed description.

As shown in fig. 1, a bearing assembly unit disclosed in the embodiment of the present invention includes a bearing outer ring 1 and a bearing inner ring 2, wherein the height of the bearing outer ring 1 is higher than that of the bearing inner ring 2, an outer ring channel is arranged on the inner wall of the bearing outer ring 1, an inner ring channel is arranged on the outer wall of the bearing inner ring 2, and the outer ring channel and the inner ring channel are oppositely included to form a bearing channel 3; a retainer 4 is arranged between the bearing outer ring 1 and the bearing inner ring 2, a plurality of balls 5 are arranged on the retainer 4, and the balls 5 can be kept on the bearing channel 3 in a rolling manner. Because the high increase of bearing inner race 1 has replaced prior art's powder metallurgy casing, therefore bearing manufacturing accuracy can promote by a wide margin, has effectively improved the assembly efficiency of bearing, because the contact mode of bearing subassembly unit and axle is the point contact in addition, reduces compared with prior art frictional force, greatly reduced the impact and the vibration of electric hammer during operation to effectively reduced the temperature of electric hammer during operation, improved the life of electric hammer.

Compared with the needle roller bearing in the prior art, the bearing assembly unit disclosed by the embodiment of the invention has the advantages that the temperature of the electric hammer during operation is reduced by 10-20 ℃, and the service life of the electric hammer is prolonged by more than 1 time.

With continued reference to fig. 1, in the bearing assembly unit disclosed in the embodiment of the present invention, the bearing outer ring 1 includes two side surfaces disposed oppositely, wherein the height of the bearing outer ring 1 extends toward one of the side surfaces.

In order to clamp the bearing inner ring 2 and ensure the stability of the bearing inner ring 2, in the bearing assembly unit disclosed by the embodiment of the invention, the inner wall of the bearing outer ring 1 is also provided with a boss 6 for clamping the bearing inner ring 2.

In the bearing assembly unit disclosed by the embodiment of the invention, the retainer 4 is made of a high-temperature-resistant, high-strength and high-toughness nylon material.

Furthermore, in order to obtain the maximum rated dynamic load and the minimum friction torque, the inner ring channel and the outer ring channel disclosed by the embodiment of the invention both adopt a design mode of deviating from the groove.

The embodiment of the invention also discloses an electric hammer which comprises the bearing assembly unit, wherein the bearing assembly unit is the bearing assembly unit disclosed in any one of the embodiments.

Since the electric hammer adopts the bearing assembly unit disclosed in the above embodiments, the electric hammer has the technical advantages of the bearing assembly unit, and further description thereof is omitted in this application.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.