CN216981704U

CN216981704U - Power head shaft of brushless motor for grass pushing

Info

Publication number: CN216981704U
Application number: CN202220018605.3U
Authority: CN
Inventors: 贝国生
Original assignee: Ningbo Wansheng Intelligent Technology Co ltd
Current assignee: Ningbo Wansheng Intelligent Technology Co ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-07-15
Anticipated expiration: 2032-01-04

Abstract

The utility model relates to a power head shaft of a grass-pushing brushless motor, which comprises a shaft body extending along the length direction, and is characterized in that: the shaft body is provided with a motor mounting section which is arranged towards one end of the shaft body; the outer peripheral wall of the shaft body is provided with a flat position axially extending from one end face to the other end, so that one end of the shaft body is provided with a flat position section on which the wind supply impeller is arranged, and the flat position section is provided with a clamp spring groove; the periphery of motor installation section is equipped with the straight line annular knurl structure, can dispel the heat the cooling and make motor life longer to the motor of installing above that, and the power head axle can realize reliable moment of torsion and stability.

Description

Power head shaft of brushless grass pushing motor

Technical Field

The utility model relates to the technical field of weeding machine accessories, in particular to a power head shaft of a grass-pushing brushless motor.

Background

With the development of economy and the improvement of the living standard of people and the continuous enhancement of awareness of people on environmental protection and environmental greening, the planting area of landscaping is continuously enlarged in all countries in the world, wherein the lawn industry is the fastest developing part in the whole landscaping industry, and particularly occupies a considerable proportion in urban construction.

The grass pusher is a hand-push type grass mower which consists of a cutter head, a power head, a traveling wheel, a traveling mechanism, a blade, a handrail and a control part, wherein the power head is used as a power output mechanism of the grass pusher and is used for driving the blade to rotate at a high speed so as to cut a lawn, and the working efficiency of the grass pusher is greatly improved.

However, because the motor rotates at a high speed, more heat can be generated in the working process of the grass mower, and if the motor is not cooled in time, the motor is easily damaged, and the service life of the power head is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a power head shaft of a grass-pushing brushless motor, which can radiate heat and cool a motor mounted on the power head shaft so as to prolong the service life of the motor.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a push away careless brushless motor power head axle, includes the axle body that extends along length direction, its characterized in that: the shaft body is provided with a motor mounting section which is arranged towards one end of the shaft body; and the outer peripheral wall of the shaft body is provided with a flat position axially extending from one end face to the other end, so that one end of the shaft body is provided with a flat position section on which the air supply impeller is arranged, and the flat position section is provided with a clamp spring groove.

In order to avoid the iron core of motor to warp when the motor is installed to motor installing section facial make-up, the periphery of motor installing section is equipped with straight line annular knurl structure. The inner hole cooperation of the whole iron core of straight line annular knurl structure and motor, the tooth embedding iron core's of straight line back can realize reliable moment of torsion and stability, compares with the plain noodles cooperation, and its power scope of impressing is stable, can not cause the deformation of iron core to the reliability has been improved to the batch assembly.

In order to facilitate circumferential fixing of the output connecting section and the transmission structure so as to stably transmit torque, the other end of the shaft body is provided with the output connecting section, and the outer peripheral wall of the output connecting section is provided with a key groove extending axially. The length of the key groove is designed according to actual requirements, and can be equal to or unequal to the length of the output connecting section.

In order to facilitate the connection of the locking output connecting section and the transmission structure, a counter bore is arranged at the end part of the other end of the shaft body, and internal threads are arranged on the peripheral wall of the counter bore. The design of the counter bore has two functions: firstly, play the guide effect when locking screw connects the internal thread, make things convenient for the smooth and easy screw in of screw, secondly when the cylindrical grinder pushes up each step of centre bore grinding, it can avoid the internal screw thread tooth mouth top.

In order to smoothly press the parts onto the shaft body, at least one end part of the shaft body is provided with a chamfer structure. The chamfer structure can guide the parts, so that the parts can be smoothly pressed into the shaft body.

In order to install the bearing and enable the shaft body to rotate more stably, the flat section and the motor installation section are provided with a first bearing installation area therebetween, and the other end of the shaft body and the motor installation section are provided with a second bearing installation area therebetween.

Further, a first grinding wheel overrun groove which is used for connecting the first bearing mounting area and the motor mounting section is formed in the shaft body. The first grinding wheel overrun groove can prevent the phenomenon of corner cleaning during cylindrical grinding, so that the end face of the bearing can be completely attached to the end face of the journal after the bearing is pressed in, and the stability of the bearing in the running process is improved.

The outer diameter of the first bearing mounting area is smaller than that of the motor mounting section, the cross section of the first grinding wheel overrun groove comprises an inclined section and an arc section, one end of the inclined section is connected with the first bearing mounting area, the other end of the inclined section is connected with the arc section in a tangent mode, and the inclined section is gradually inclined inwards from one end to the other end; the arc section is arched towards the first grinding wheel overrun groove, and the other end of the arc section is connected with the motor mounting section in a tangent mode. The design can make things convenient for the cylindrical grinding processing in first bearing installation region to guarantee that axle body length dimension is not destroyed, thereby improve the precision and the power transmission performance of axle. Cross-section refers to a vertical length or axial section or profile.

And a shaft collar connected with the other end of the motor mounting section is arranged on the shaft body, and a second grinding wheel overrun groove is formed in the shaft body between the shaft collar and the second bearing mounting area. The design of the collar enables locating the bearing mounted in the second bearing mounting region. The second grinding wheel overrun groove can prevent the phenomenon of non-angle cleaning during cylindrical grinding, so that the end face of the bearing can be completely attached to the end face of the shaft neck after the bearing is pressed in, and the stability of the bearing in the operation process is improved.

Further, the outer diameter of the motor mounting section is 25 +/-0.06 mm, the outer diameter of the first bearing mounting area is 12 +/-0.08 mm, and the outer diameter of the second bearing mounting area is 25 +/-0.08 mm.

Compared with the prior art, the utility model has the advantages that: the flat section capable of installing the air supply impeller on the shaft body is arranged on the shaft body, and the air impeller is positioned through the clamp spring arranged in the clamp spring groove, so that the axial movement of the air impeller on the shaft body is prevented, the air impeller arranged on the flat section blows air to the motor arranged on the motor installation section after rotating along with the shaft body, the heat dissipation and cooling are carried out on the motor, the damage to the motor can be avoided, the service life of the motor is prolonged, and the service life of the power head is prolonged; through the hole cooperation that sets up straight line annular knurl structure and the whole iron core of motor in the periphery at motor installation section, behind the tooth embedding iron core's of straight line hole, can realize reliable moment of torsion and stability, compare with the plain noodles cooperation, its impressing force scope is stable, can not cause the deformation of iron core to the reliability has been improved to the assembly in batches.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is an enlarged view at B in fig. 1.

Detailed Description

The utility model is described in further detail below with reference to the following examples of the drawings.

As shown in FIGS. 1-2, it is a preferred embodiment of the present invention.

The grass-pushing brushless motor power head shaft in the embodiment, as shown in fig. 1, includes a shaft body 100 extending along the length direction, and the shaft body 100 is provided with a motor mounting section 1 arranged to be biased to one end thereof; the outer peripheral wall of the shaft body 100 is provided with a flat portion 21 extending axially from one end face to the other end, so that one end of the shaft body 100 is provided with a flat portion 2 on which the wind impeller can be mounted, and the flat portion 2 is provided with a snap spring groove 22. During the use, install the jump ring in jump ring groove 22, and install fan wheel on flat section 2, make fan wheel stably locate flat section and can not be at the axial float on axle body 100 to make the fan wheel of installing in flat section 2 blow to the motor of installing in motor installation section 1 after rotating along with axle body 100, in order to cool down the motor dispels the heat, thereby can avoid the motor to damage, the life of extension motor, and then the life of extension unit head.

As shown in fig. 1 and 2, the other end of the shaft body 100 is provided with an output connecting section 3, and the outer peripheral wall of the output connecting section 3 is provided with an axially extending key groove 31, so that the output connecting section 3 is circumferentially fixed with the transmission structure to stably transmit torque. In this embodiment, the length of the key groove 31 is smaller than the length of the output connecting section 3. The other end tip center of axle body 100 is equipped with counter bore 32, is equipped with internal thread 33 on this counter bore 32's the perisporium to be connected with transmission structure through threaded connection structure locking output connection section 3, and the design of counter bore 32 has two effects: firstly, play the guide effect when locking screw connects internal thread 33, make things convenient for smooth and easy screw in of screw, secondly when the centre bore grinding of cylindrical grinding top each step, top can avoid the tooth mouth of internal thread 33.

In order to facilitate smooth pressing of the components into the shaft body 100, as shown in fig. 1, the shaft body 100 is provided with chamfer structures 4 at both end portions thereof. The chamfered structure 4 can guide the component and smoothly press the component into the shaft body 100.

In order to facilitate the installation of the bearing and to make the rotation of the shaft body 100 more stable, as shown in fig. 1, a first bearing installation region 51 is provided between the flat position section 2 and the motor installation section 1, and a second bearing installation region 52 is provided between the other end of the shaft body 100 and the motor installation section 1. In this embodiment, the outer diameter Φ 1 of the motor mounting section is 25 ± 0.06mm, the outer diameter Φ 2 of the first bearing mounting region 51 is 12 ± 0.08mm, and the outer diameter Φ 3 of the second bearing mounting region 52 is 25 ± 0.08 mm.

As shown in fig. 1, the shaft body 100 is provided with a first grinding wheel overrun groove 61 for engaging the first bearing mounting area 51 with the motor mounting section 1. The first grinding wheel overrun groove 61 can ensure that the phenomenon of corner cleaning is avoided during cylindrical grinding, so that the end face of the bearing can be completely attached to the end face of the shaft neck after the bearing is pressed in, and the stability of the bearing in the running process is improved. The outer diameter of the first bearing mounting area 51 is smaller than that of the motor mounting section 1, the cross section of the first grinding wheel overrun groove 61 comprises an inclined section 611 and an arc section 612, one end of the inclined section 611 is connected with the first bearing mounting area 51, the other end of the inclined section 611 is connected with the arc section 612 in a tangent mode, and the inclined section 611 gradually inclines inwards from one end to the other end; the arc section 612 is arched towards the inside of the first grinding wheel overrun groove 61, and the other end of the arc section 612 is connected with the motor mounting section 1 in a tangent mode. (see FIG. 3). This design facilitates the outer edge grinding of the first bearing mounting region 51 and ensures that the length dimension of the shaft body 100 is not damaged.

As shown in fig. 1, the shaft body 100 is provided with a collar 7 engaged with the other end of the motor mounting section 1, and a second grinding wheel overrun groove 62 is formed in the shaft body 100 between the collar 7 and the second bearing mounting region 52. The design of the collar 7 enables locating the bearing mounted in the second bearing mounting region 52. The second grinding wheel overrun groove 62 can ensure that no corner cleaning phenomenon is generated during cylindrical grinding, so that the end face of the bearing can be completely attached to the end face of the shaft neck after the bearing is pressed in, and the stability of the bearing in the running process is improved.

As shown in fig. 1, the motor mounting section 1 is provided with a straight knurling structure 11 on the outer circumference. The inner hole cooperation of the whole iron core of straight line annular knurl structure 11 and motor, the tooth embedding iron core's of straight line back can realize reliable moment of torsion and stability, compares with the plain noodles cooperation, and its impressing force scope is stable, can not cause the deformation of iron core to the reliability has been improved to the batch assembly.

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the utility model, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims

1. A push away careless brushless motor power head axle, includes axle body (100) that extends along length direction, its characterized in that: the shaft body (100) is provided with a motor mounting section (1) which is arranged towards one end of the shaft body; moreover, a flat position (21) axially extending from one end face to the other end is formed on the outer peripheral wall of the shaft body (100), so that one end of the shaft body (100) is provided with a flat position section (2) on which a wind supply impeller is arranged, and a clamp spring groove (22) is formed in the flat position section (2); the periphery of the motor mounting section (1) is provided with a straight knurling structure (11).

2. The grass-pushing brushless motor power head shaft as claimed in claim 1, characterized in that: the other end of the shaft body (100) is provided with an output connecting section (3), and the outer peripheral wall of the output connecting section (3) is provided with an axially extending key groove (31).

3. The grass-pushing brushless motor power head shaft as claimed in claim 2, characterized in that: the other end of the shaft body (100) is provided with a counter bore (32), and the peripheral wall of the counter bore (32) is provided with internal threads (33).

4. The brushless motor powerhead shaft of claim 2, wherein: at least one end part of the shaft body (100) is provided with a chamfer structure (4).

5. The brushless motor drive head shaft of any one of claims 1-4, wherein: the motor is characterized in that a first bearing mounting area (51) is arranged between the flat position section (2) and the motor mounting section (1), and a second bearing mounting area (52) is arranged between the other end of the shaft body (100) and the motor mounting section (1).

6. The grass-pushing brushless motor power head shaft as claimed in claim 5, wherein: the shaft body (100) is provided with a first grinding wheel overtravel groove (61) for connecting the first bearing mounting area (51) and the motor mounting section (1).

7. The grass-pushing brushless motor power head shaft as claimed in claim 6, wherein: the outer diameter of the first bearing mounting area (51) is smaller than that of the motor mounting section (1), the cross section of the first grinding wheel overrun groove (61) comprises an inclined section (611) and an arc section (612), one end of the inclined section (611) is connected with the first bearing mounting area (51), the other end of the inclined section is connected with the arc section (612) in a tangent mode, and the inclined section (611) is gradually inclined inwards from one end to the other end; the arc section (612) is arched towards the first grinding wheel overrun groove (61), and the other end of the arc section (612) is connected with the motor mounting section (1) in a tangent mode.

8. The brushless motor powerhead shaft of claim 5, wherein: the shaft body (100) is provided with a shaft collar (7) connected with the other end of the motor mounting section (1), and a second grinding wheel overtravel groove (62) is formed in the shaft body (100) between the shaft collar (7) and the second bearing mounting area (52).

9. The brushless motor powerhead shaft of claim 5, wherein: the outer diameter of the motor mounting section is 25 +/-0.06 mm, the outer diameter of the first bearing mounting area (51) is 12 +/-0.08 mm, and the outer diameter of the second bearing mounting area (52) is 25 +/-0.08 mm.