CN213717747U

CN213717747U - Bearing support mechanism and motor

Info

Publication number: CN213717747U
Application number: CN202023156994.6U
Authority: CN
Inventors: 金利明; 秦云峰; 胡计涛
Original assignee: Kingclean Electric Co Ltd; Jiangsu Kingclean Intelligent Appliance Co Ltd
Current assignee: Kingclean Electric Co Ltd; Jiangsu Kingclean Intelligent Appliance Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-07-16
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a bearing supporting mechanism, including the bearing room that is used for installing the motor bearing, the inner wall of bearing room is equipped with many spinal branchs of complex number brace rod, many spinal branchs of complex number brace rod are followed inner wall circumferencial direction evenly distributed, the brace rod with the outer lane interference fit of motor bearing, the brace rod is rectangular form, the radical of brace rod with the ratio of bearing room diameter is 1.3/mm-3/mm. The utility model has the advantages that the supporting ribs are uniformly distributed in the circumferential direction of the bearing chamber, and the supporting ribs and the outer ring of the motor bearing are in interference fit, so that the running reliability of the motor under the working conditions of high power and frequent start and stop is improved, the use requirement is met, and the service life of the motor is prolonged; the supporting ribs are provided with tips facing the outer ring of the motor bearing, so that the motor bearing can be tightly held when the motor bearing is arranged in the bearing chamber, and the motor bearing is more stably loaded in the gear box; the inlet of the bearing chamber is formed with a chamfer with smooth transition so as to facilitate the installation of the motor bearing.

Description

Bearing support mechanism and motor

Technical Field

The utility model relates to the technical field of electric machines, in particular to bearing supporting mechanism.

Background

Generally, the motor of the garden electrical appliance runs under the working conditions of high power and frequent start and stop, so that the motor is required to have stable reliability and is not easy to lose efficacy. Generally, a bearing chamber of a light hole mechanism is in transition fit with a bearing outer ring of the motor, glue is used for fixation, a motor shaft and a mandrel are in gear transmission, and the transmission ratio is generally 4.6-6.5.

However, such a bearing support mechanism has problems such as unstable reliability and easy failure after unbalanced load or increased switching frequency, and thus cannot meet the use requirements. Especially, after the glue is failed, the matching state of the motor bearing and the bearing chamber is unstable, and the motor bearing and the bearing chamber are easy to deform after the friction occurs between the motor bearing and the bearing chamber, so that the motor is failed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the above-mentioned defect among the prior art, provide a bearing supporting mechanism and motor that the reliability is stable, difficult inefficacy.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: the utility model provides a bearing supporting mechanism, is including the bearing room that is used for installing the motor bearing, the inner wall of bearing room is equipped with many spinal branchs of complex number, many spinal branchs of complex number are followed inner wall circumferencial direction evenly distributed, the spinal branchs with the outer lane interference fit of motor bearing, the spinal branchs is rectangular form, the radical of spinal branchs and the ratio of bearing room diameter is 1.3/mm-3/mm.

Furthermore, the support rib is provided with a tip towards the outer ring of the motor bearing, and when the motor bearing is installed in the bearing chamber, the tip deforms to hold the motor bearing tightly.

Furthermore, the support rib extends along the axial direction of the bearing chamber, and the length h of the support rib is 8.0-9.0 mm.

Furthermore, the supporting ribs protrude out of the inner wall of the bearing chamber, and the protruding height d is 0.03-0.06 mm.

Further, the bearing chamber is provided with 40-90 support ribs.

Further, the cross section of the supporting rib is basically triangular, trapezoidal or semicircular.

Furthermore, a chamfer with smooth transition is formed at the inlet of the bearing chamber, and the angle of the chamfer is 15-25 degrees.

Furthermore, an adhesive is supplemented between the outer ring of the motor bearing and the bearing chamber for fixing.

Furthermore, the bearing chamber is arranged on the gear box, the supporting rib and the gear box are integrated, and the supporting rib and the gear box are formed by injection molding.

The motor is provided with the bearing support mechanism, and the bearing support mechanism is arranged at the load end of the motor.

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

supporting ribs are uniformly distributed in the circumferential direction of the bearing chamber, and the supporting ribs are in interference fit with the outer ring of the motor bearing, so that the running reliability of the motor under the working conditions of high power and frequent start and stop is improved, the use requirement is met, and the service life of the motor is prolonged; the supporting ribs are provided with tips facing the outer ring of the motor bearing, so that the motor bearing can be tightly held when the motor bearing is arranged in the bearing chamber, and the motor bearing is more stably loaded in the gear box; the inlet of the bearing chamber is provided with a chamfer with smooth transition, which is convenient for the installation of the motor bearing.

Drawings

Fig. 1 is a schematic mechanism diagram of the bearing support mechanism of the present invention.

Fig. 2 is a schematic mechanism diagram of the support rib of the bearing support mechanism of the present invention.

Fig. 3 is a sectional view of the motor of the present invention.

Fig. 4 is a schematic connection diagram of the motor shaft, the rotor assembly, the motor bearing and the first gear of the motor of the present invention.

Wherein:

1. a gear case; 2. a bearing chamber; 20. chamfering; 21. an inner wall; 3. supporting ribs; 30. a tip; 4. a motor housing;

5. a motor bearing; 6. a rotor assembly; 7. a stator assembly; 8. a motor shaft; 9. a first gear; 10. a second gear;

11. a first thrust bearing; 12. a swash plate; 13. a second thrust bearing; 14. a load end; 15. a mandrel; 1a, a bottom plate.

Detailed Description

The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length h", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1, the utility model discloses a bearing support mechanism of embodiment, including the bearing room 2 that is used for installing motor bearing 5, the inner wall 21 of bearing room 2 is equipped with many spinal branchs of complex number brace rod 3, and many spinal branchs of complex number brace rod 3 are along 21 circumferencial direction evenly distributed of inner wall, brace rod 3 and motor bearing 5's outer lane interference fit, the brace rod is rectangular form, the root number of brace rod with the ratio of bearing room diameter is 1.3/mm-3/mm. The bearing support mechanism is applied to the motor, when the motor operates, the load is transmitted to the bearing support mechanism through the motor bearing, and the support rib 3 bears the load in the operation process of the motor, so that the stability of the motor is improved, and the motor can stably operate under the working condition of high power and frequent start and stop.

The supporting rib 3 is provided with a tip 30 towards the outer ring of the motor bearing 5, when the motor bearing 5 is installed in the bearing chamber 2, the tip 30 deforms to hold the motor bearing 5 tightly, and the shape of the tip 30 can be a circular arc shape as shown in fig. 2, or other shapes. The tips 30 may be continuously provided between the plurality of support ribs 3 or may be provided at intervals. The cross section of the support rib 3 is triangular, trapezoidal, semicircular or other shapes, the support rib 3 extends along the axial direction of the bearing chamber 2, and the length h of the support rib 3 is 8.0-9.0 mm. Preferably, the length h of the support rib 3 is 8.5 mm. The supporting ribs 3 protrude from the inner wall 21 of the bearing chamber 2 and protrude towards the axial direction of the bearing chamber 2, and the protruding height d is 0.03-0.06 mm.

In a specific application scene, the diameter of the opening of the bearing chamber 2 ranges from 29.98 mm to 30.06mm, 40 to 90 support ribs 3 are arranged in the bearing chamber 2, and a proper number of support ribs 3 can be arranged according to the size of the bearing chamber 2.

A chamfer 20 with smooth transition is formed at the inlet of the bearing chamber 2, and the angle of the chamfer 20 is between 15 and 25 degrees, so that the motor bearing 5 is conveniently installed in the bearing chamber 2. The bearing chamber 2 is special-shaped, the bearing chamber 2 is arranged on the gear box 1, and the supporting ribs 3 and the gear box 1 are integrated and are formed through injection molding. The bearing chamber 2 and the outer ring of the motor bearing 5 are fixed together by adhesive, so that the motor bearing 5 can be more stably arranged in the bearing chamber 2.

An electric motor having the bearing support mechanism described above has a load end 14 with the bearing support mechanism disposed at the load end of the motor. The motor also comprises a motor shell 4, a rotor assembly 6 and a stator assembly 7 which are arranged in the motor shell 4, and a motor shaft 8 which is fixedly connected with the rotor assembly 6, wherein the motor shell 4 is fixedly connected with the gear box 1.

Motor bearing 5 cover is established on motor shaft 8, and motor shaft 8's end still overlaps and is equipped with first gear 9, and motor bearing 5 sets up between first gear 9 and rotor subassembly 6. The first gear 9 is engaged with a second gear 10 fitted around the spindle 15, the second gear 10 is disposed in the gear case 1, and a first thrust bearing 11 is disposed between the second gear 10 and a bottom plate 1a of the gear case 1. A swash plate 12 is sleeved on a gear shaft of the second gear 10, and a second thrust bearing 13 is sleeved on the swash plate 12. The spindle 15, the swash plate 12 and the second thrust bearing 13 are all arranged in the gearbox 1, wherein the spindle 15 partly extends out of the gearbox 1.

When the motor works, the rotor assembly 6 rotates, the first gear 9 on the motor shaft 8 drives the second gear 10 on the mandrel 15 to rotate, power is output through the matching of the first thrust bearing 11, the second thrust bearing 13, the swash plate 12 and the mandrel 15, and according to the force interaction, the stress characteristics of gear meshing and the working mode, the load is known to be in a pulsating mode and is transmitted to the motor shaft 8 through the first gear 9, and the load is finally transmitted to the support rib 3 and is borne by the support rib 3 in the motor running process due to the fact that the support rib 3 is fixed and supported by the motor bearing 5 sleeved on the motor shaft 8, so that the stability of the motor is improved, the motor can stably run under the working condition of high power and frequent start and stop, the failure is not easy to occur, the use requirement is met, and the service life of the motor is prolonged; meanwhile, the motor can adapt to different load strengths and has strong adaptability.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a bearing supporting mechanism, is including bearing chamber (2) that are used for installing motor bearing (5), its characterized in that, inner wall (21) of bearing chamber (2) are equipped with many spinal branchs brace rod (3) of plural number, many spinal branchs brace rod (3) of plural number are followed inner wall (21) circumferencial direction evenly distributed, brace rod (3) with the outer lane interference fit of motor bearing (5), brace rod (3) are rectangular form, the radical of brace rod (3) with the ratio of bearing chamber (2) diameter is 1.3 root/mm-3 root/mm.

2. The bearing support mechanism according to claim 1, characterized in that the support rib (3) is provided with a tip (30) towards the outer ring of the motor bearing (5), and when the motor bearing (5) is installed in the bearing chamber (2), the tip (30) is deformed to clasp the motor bearing (5).

3. Bearing support mechanism according to claim 1, characterized in that the support rib (3) extends axially along the bearing chamber (2), the length h of the support rib (3) being 8.0-9.0 mm.

4. Bearing support mechanism according to claim 1, characterized in that the support ribs (3) protrude from the inner wall (21) of the bearing chamber (2) by a height d of 0.03-0.06 mm.

5. Bearing support mechanism according to claim 1, characterized in that the bearing chamber (2) is provided with 40-90 support ribs (3).

6. Bearing support mechanism according to claim 1, characterized in that the cross-section of the support ribs (3) is substantially triangular or trapezoidal or semicircular.

7. Bearing support mechanism according to claim 1, characterized in that the bearing chamber (2) is formed with a smoothly transitioning chamfer (20) at the entrance, the angle of the chamfer (20) being 15-25 °.

8. The bearing support mechanism according to claim 1, characterized in that an adhesive is additionally arranged between the outer ring of the motor bearing (5) and the bearing chamber (2) for fixing.

9. The bearing support mechanism according to claim 8, characterized in that the bearing chamber (2) is opened in the gear box (1), the support rib (3) and the gear box (1) are an integral mechanism, and the support rib (3) and the gear box (1) are formed by injection molding.

10. An electric machine having a bearing support mechanism according to any of claims 1 to 9, wherein the bearing support mechanism is mounted at a load end (14) of the electric machine.