CN210978232U

CN210978232U - Swing rod bearing

Info

Publication number: CN210978232U
Application number: CN201922100593.XU
Authority: CN
Inventors: 林文焕
Original assignee: WENLING BAIBANG ELECTRIC TOOL FITTING FACTORY
Current assignee: WENLING BAIBANG ELECTRIC TOOL FITTING FACTORY
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-07-10
Anticipated expiration: 2029-11-29

Abstract

The utility model provides a swing rod bearing, it includes the bearing core, overlaps the bearing shell outside the bearing core, presss from both sides the holder between bearing core and bearing shell, is equipped with the ball on the holder, is equipped with the pendulum rod on the bearing shell, be equipped with on the bearing core with the direct clearance fit's of jackshaft installation through-hole, be equipped with the oil storage tank on the interior anchor ring of installation through-hole. The mode that the mounting through hole is directly matched with the intermediate shaft is equivalent to the mode that a needle bearing between the mounting through hole and the intermediate shaft is omitted, so that the damage phenomenon of the needle bearing is effectively avoided; meanwhile, the cost of the needle bearing is saved, and the overall cost of the swing rod bearing is greatly reduced; the needle bearing is omitted, so that the aperture of the mounting through hole on the bearing core can be smaller, namely the wall thickness of the mounting through hole of the bearing core is increased, and the structural strength of the bearing core is enhanced; wherein, the setting of oil storage tank has replaced bearing in other words, guarantees the stability and the smoothness nature of jackshaft motion, and overall structure is stronger, and is difficult for destroying.

Description

Swing rod bearing

Technical Field

The utility model relates to a bearing field, in particular to swing rod bearing.

Background

A wobble shaft bearing is a common component in power tools. The traditional swing rod bearing basically comprises a bearing core, a bearing shell, balls clamped between the bearing core and the bearing shell, a retainer and other structures, wherein a swing rod is arranged on the bearing shell, an intermediate shaft can be inserted into the bearing core, and the intermediate shaft is in movable fit with the bearing core through a needle bearing.

The invention discloses an electric hammer with the publication number of CN104802137B, which comprises a machine body, a motor, a rotating sleeve assembly, an air cylinder assembly and a middle shaft assembly, wherein the motor is meshed with a first-stage wheel of the middle shaft assembly through a motor shaft gear so as to drive a middle shaft to rotate, a swing rod bearing is arranged in the middle shaft assembly, and the air cylinder assembly can reciprocate in an inner hole of the swing sleeve through swing of a swing rod of the swing rod bearing. Wherein, in order to guarantee the stability and the smooth degree of jackshaft and swing rod bearing cooperation motion, swing rod bearing passes through bearing and jackshaft movablely cooperation.

Traditionally, all can install bearing in the bearing core of swing rod bearing in order to guarantee that the motion jackshaft rotates steadily, but have violent vibration in the use of electric hammer instrument, small and exquisite bearing is damaged easily, and it is troublesome to change.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a swing rod bearing, its cooperation with the jackshaft need not bearing and has guaranteed the steady of motion equally, still practices thrift the cost.

In order to solve the technical problem, the technical scheme of the utility model is that: the swing rod bearing comprises a bearing core, a bearing shell sleeved outside the bearing core, and a retainer clamped between the bearing core and the bearing shell, wherein balls are arranged on the retainer, a swing rod is arranged on the bearing shell, an installation through hole in direct clearance fit with an intermediate shaft is arranged on the bearing core, and an oil storage tank is arranged on the inner ring surface of the installation through hole.

Through the technical scheme, the mode that the installation through hole is directly matched with the intermediate shaft is equivalent to the mode that a needle bearing between the installation through hole and the intermediate shaft is omitted, so that the damage phenomenon of the needle bearing is effectively avoided; meanwhile, the cost of the needle bearing is saved, and the overall cost of the swing rod bearing is greatly reduced; the needle bearing is omitted, so that the aperture of the mounting through hole on the bearing core can be smaller, namely the wall thickness of the mounting through hole of the bearing core is increased, and the structural strength of the bearing core is enhanced; in addition, the worker also omits the assembly step of the needle bearing when assembling; wherein, the setting of oil storage tank has replaced bearing in other words, guarantees the stability and the smoothness nature of jackshaft motion in the mounting hole, and overall structure is stronger, and is difficult for destroying.

Preferably, the length direction of oil storage tank sets up along the axis of installation through-hole, the oil storage tank is a plurality of and circumference evenly distributed in the interior anchor ring of installation through-hole.

Through the technical scheme, the oil in the oil storage tank can uniformly provide lubrication for the intermediate shaft, so that the stability of movement is ensured.

Preferably, the oil storage tank is an annular groove, the axis of the annular groove coincides with the axis of the mounting through hole, and the annular groove is a plurality of and is uniformly distributed along the axis of the mounting through hole at intervals.

Through above-mentioned technical scheme, when the jackshaft rotated, fluid can flow along with the jackshaft, effectively reduced the phenomenon that fluid leaks away.

Preferably, the oil storage tank is spirally arranged around the axis of the mounting through hole on the inner ring surface of the mounting through hole.

Through above-mentioned technical scheme, fluid in the oil storage tank can also carry out axial spiral along with the rotation of jackshaft and flow, and lubricated effect is better.

Preferably, the number of the oil storage grooves arranged in a spiral mode is two, and the spiral directions of the two oil storage grooves are opposite.

Through above-mentioned technical scheme, fluid in the oil storage tank can make a round trip to flow along with two positive and negative helices when the jackshaft moves, improves lubricated effect.

The utility model discloses technical effect mainly embodies in following aspect:

1. the mode that the mounting through hole is directly matched with the intermediate shaft is equivalent to the mode that a needle bearing between the mounting through hole and the intermediate shaft is omitted, so that the damage phenomenon of the needle bearing is effectively avoided;

2. the cost of a needle bearing is saved, and the overall cost of the swing rod bearing is greatly reduced;

3. the wall thickness of the mounting through hole of the bearing core is thickened, so that the structural strength of the bearing core is enhanced;

4. the oil in the oil storage tank can uniformly provide lubrication for the intermediate shaft, and the stability of motion is ensured.

Drawings

FIG. 1 is a schematic structural diagram according to a first embodiment;

FIG. 2 is a schematic cross-sectional view of the first embodiment;

FIG. 3 is a schematic cross-sectional view of the second embodiment;

FIG. 4 is a schematic sectional view showing a third embodiment;

FIG. 5 is a schematic sectional view of the fourth embodiment.

Reference numerals: 1. a bearing core; 2. a bearing housing; 3. a holder; 4. a ball bearing; 5. a swing rod; 6. mounting a through hole; 7. and an oil storage tank.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and grasped.

Embodiment one, a swing rod bearing:

the swing rod bearing shown in the attached figures 1 and 2 comprises a bearing core 1, a bearing shell 2 sleeved outside the bearing core 1, and a retainer 3 clamped between the bearing core 1 and the bearing shell 2, wherein balls 4 are arranged on the retainer 3, a swing rod 5 is arranged on the bearing shell 2, an installation through hole 6 in direct clearance fit with an intermediate shaft is arranged on the bearing core 1, and an oil storage tank 7 is arranged on the inner ring surface of the installation through hole 6. Wherein, the length direction of oil storage tank 7 sets up along the axis of mounting hole 6, and oil storage tank 7 is a plurality of and circumference evenly distributed in the interior anchor ring of mounting hole 6. The mode that the mounting through hole 6 is directly matched with the intermediate shaft is equivalent to the mode that a needle bearing between the mounting through hole and the intermediate shaft is omitted, so that the damage phenomenon of the needle bearing is effectively avoided; meanwhile, the cost of a needle bearing is saved, and the overall cost of the bearing of the swing rod 5 is greatly reduced; because the needle bearing is omitted, the aperture of the mounting through hole 6 on the bearing core 1 can be smaller, which is equivalent to thickening the wall thickness of the mounting through hole 6 of the bearing core 1, and is beneficial to enhancing the structural strength of the bearing core 1; in addition, the worker also omits the assembly step of the needle bearing when assembling; wherein, the setting of oil storage tank 7 has replaced bearing equivalently, guarantees the stability and the smoothness nature of jackshaft motion in mounting hole 6, and overall structure is stronger, and is difficult for destroying.

Embodiment two, a swing rod bearing:

referring to fig. 3, the difference between the second embodiment and the first embodiment is that the oil storage tank 7 is an annular groove, the axis of the annular groove coincides with the axis of the mounting through hole 6, and the annular grooves are a plurality of annular grooves and are uniformly arranged at intervals along the axis of the mounting through hole 6. When the intermediate shaft rotates, the oil can flow along with the intermediate shaft, and the phenomenon of oil leakage is effectively reduced.

Embodiment three, a swing rod bearing:

referring to fig. 4, the third embodiment is different from the first embodiment in that an oil reservoir 7 is spirally provided around the axis of a mounting through-hole 6 at the inner circumferential surface of the mounting through-hole 6. The oil liquid in the oil storage tank 7 can also flow spirally along with the rotation of the intermediate shaft in the axial direction, so that the lubricating effect is better.

Embodiment four, a swing rod bearing:

referring to fig. 5, the fourth embodiment is different from the first embodiment in that the number of the oil reservoirs 7 spirally arranged is two, and the spiral directions of the two oil reservoirs 7 are opposite. When the intermediate shaft moves, oil in the oil storage tank 7 can flow back and forth along with the positive and negative spiral lines, so that the lubricating effect is improved.

Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.

Claims

1. The utility model provides a swing rod bearing, includes bearing core (1), overlaps bearing shell (2) outside bearing core (1), presss from both sides holder (3) between bearing core (1) and bearing shell (2), is equipped with ball (4) on holder (3), is equipped with pendulum rod (5), characterized by on bearing shell (2): be equipped with on bearing core (1) with the direct clearance fit's of jackshaft installation through-hole (6), be equipped with oil storage tank (7) on the interior anchor ring of installation through-hole (6).

2. The swing rod bearing of claim 1, wherein: the length direction of oil storage tank (7) sets up along the axis of mounting hole (6), oil storage tank (7) are a plurality of and circumference evenly distributed in the interior anchor ring of mounting hole (6).

3. The swing rod bearing of claim 1, wherein: the oil storage tank (7) is an annular groove, the axis of the annular groove coincides with the axis of the mounting through hole (6), and the annular groove is a plurality of and is uniformly distributed along the axis of the mounting through hole (6) at intervals.

4. The swing rod bearing of claim 1, wherein: the oil storage tank (7) is spirally arranged around the axis of the mounting through hole (6) on the inner ring surface of the mounting through hole (6).

5. The swing rod bearing of claim 4, wherein: the number of the oil storage tanks (7) arranged in a spiral way is two, and the spiral directions of the two oil storage tanks (7) are opposite.