Support and motor using same

Abstract

The utility model discloses a support and a motor using the same, the support comprises a support body and a limiting boss, and the support body is provided with a positioning boss matched with a gear shaft; the positioning boss is of an open-loop structure; the limiting boss is installed at the end, away from the support body, of the positioning boss and provided with an annular inner side face in contact fit with the gear shaft. The limiting boss is additionally arranged on the basis of an original support, the size of the contact face of the gear shaft and the support is increased through contact fit of the annular inner side face of the limiting boss to the gear shaft, and therefore abrasion caused by deviation of the gear shaft due to overlarge one-way external force can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of servo motors, in particular to a bracket and a motor using the bracket. Background Art

[0002] Micro stepper motors are widely used in the existing market and are often used in household electrical appliances such as air conditioners and fans, which require life tests on the motors.

[0003] The gear support structure of the existing motor is as follows Figure 1 As shown, it has the following disadvantages:

[0004] In order to avoid interference with the gear wheel, the positioning boss 3 on the gear bracket for positioning the gear shaft is usually a semicircular boss. When the motor is not installed vertically, the contact surface is small when the bracket performs unilateral positioning and guiding on the gear shaft, and the force on both sides is uneven. When the gear shaft is subjected to uneven force, it will wear against the gear shaft hole of the cover plate. If it runs for too long, the gear shaft will cause serious wear and deformation, resulting in oil leakage during the operation of the motor, which will further cause the related products to fail to operate normally.

[0005] Therefore, it is necessary to design a gear bracket that can reduce the wear of the gear shaft. Utility Model Content

[0006] In order to solve the technical problems in the prior art that when the motor is not installed vertically, the gear shaft is subjected to uneven force and the gear shaft is severely worn and deformed, the utility model provides a bracket and a motor using the bracket to solve the above problems.

[0007] The utility model proposes a bracket for installing and positioning a gear, comprising a bracket body and a limiting boss, wherein the bracket body has a positioning boss matched with a gear shaft; the positioning boss is an open-loop structure; the limiting boss is installed at one end of the positioning boss away from the bracket body, and is provided with an annular inner side surface contacting and matching with the gear shaft.

[0008] Furthermore, an end of the limiting boss away from the positioning boss has an oil storage groove, and the oil storage groove cooperates with the gear to form an oil storage cavity.

[0009] Furthermore, one end of the limiting boss away from the oil storage tank is provided with a chamfer.

[0010] Furthermore, the inner circumferential surface of the oil storage tank is a conical surface that expands and extends from the inner side of the annular shape toward the end surface.

[0011] Furthermore, the cross section of the annular inner side surface is circular.

[0012] Furthermore, the cross section of the annular inner side surface is a polygon.

[0013] Furthermore, the cross section of the inner side surface of the ring is a regular polygon.

[0014] Furthermore, the inner diameter of the limiting boss is the same as the inner diameter of the positioning boss.

[0015] Furthermore, the limiting boss and the positioning boss are integrally formed.

[0016] Furthermore, an end surface of the positioning boss away from the limiting boss is provided with a chamfer.

[0017] Furthermore, the height A of the limiting boss is 1 mm to 1.5 mm.

[0018] Furthermore, the end surface distance B between the limiting boss and the gear located below the limiting boss is 0.2 mm to 0.3 mm.

[0019] The utility model also provides a motor, comprising the bracket mentioned above.

[0020] The beneficial effects of the utility model are:

[0021] (1) The utility model adds a limiting boss on the basis of the original bracket, and increases the size of the contact surface between the gear shaft and the bracket through the contact cooperation of the annular inner side of the limiting boss with the gear shaft, thereby effectively avoiding the wear of the gear shaft caused by the displacement of the gear shaft due to excessive unidirectional external force.

[0022] (2) The utility model sets an oil storage tank on the limiting boss, so that there is always grease between the gear and the gear shaft to fill the gap and reduce the noise generated by the collision between the gear and the gear shaft. The presence of grease can also be transmitted to the meshing between the teeth to reduce the gear noise when the motor is running. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a stereogram of a bracket in the prior art;

[0025] Figure 2 It is a stereogram of a specific implementation of the bracket of the utility model;

[0026] Figure 3 It is a schematic diagram of the assembly of the bracket and the fixing plate assembly of the utility model;

[0027] Figure 4 It is a schematic diagram of the bottom structure of the bracket of the utility model;

[0028] Figure 5 It is a front view of a specific embodiment of the bracket of the utility model;

[0029] Figure 6 It is a cross-sectional view of the position limiting boss portion of the bracket of the utility model;

[0030] Figure 7 It is a schematic diagram of the matching relationship between the bracket and the gear of the utility model;

[0031] Figure 8 It is a schematic diagram of the top structure of a specific implementation of the bracket of the utility model.

[0032] In the figure, 1, bracket body, 2, limiting boss, 201, annular inner side, 3, positioning boss, 4, gear shoulder frame, 5, positioning column, 6, upper countersunk hole, 7, lower countersunk hole, 8, interference gear, 9, oil storage tank, 10, oil storage cavity, 11, chamfer, 12, gear shaft, 13, fixed plate assembly. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] Embodiment 1

[0035] A bracket for mounting and positioning a gear, comprising a bracket body 1, which is the same as the traditional structure, such as Figure 2 As shown, the bracket body 1 is provided with a gear shoulder 4, a positioning column 5, a positioning boss 3, an upper countersunk hole 6 and a lower countersunk hole 7. In the utility model, the side of the bracket body 1 facing the cover plate assembly is the upper side, and the opposite side is the lower side. The gear shoulder 4, the positioning boss 3 and the upper countersunk hole 6 are all arranged on the upper side of the bracket body 1, and the positioning column 5 and the lower countersunk hole 7 are arranged on the lower side of the bracket body 1. The gear shoulder 4 is located at the outer edge of the bracket body 1 and is used to limit the cover plate assembly. The positioning column 5 is used to cooperate with the positioning hole on the fixed plate assembly 13 for positioning. The upper countersunk hole 6 and the lower countersunk hole 7 are coaxial. The upper countersunk hole 6 cooperates with the output shaft, and the lower countersunk hole 7 cooperates with the rotating shaft of the rotor assembly. The positioning boss 3 cooperates with the gear shaft 12. The positioning boss 3 is an open ring structure, that is, a semicircular ring with a notch. The notch part is to avoid the adjacent interference gear 8.

[0036] The utility model adds a limiting boss 2 on the basis of the traditional bracket, and the limiting boss 2 is installed on the end of the positioning boss 3 away from the bracket body 1, and is provided with an annular inner side surface 201 that contacts and cooperates with the gear shaft 12. When the motor is not installed vertically, the annular inner side surface 201 can position and guide the gear shaft 12 in any direction of the circumference (such as Figure 3 As shown), avoid uneven force. Figure 2 and Figure 6It can be seen that the limiting boss 2 is located above the positioning boss 3 and also above the interference gear 8. Therefore, the limiting boss 2 does not need to consider the interference problem and can be designed as a closed-loop structure. The setting of the annular inner side surface 201 solves the problem of uneven force on the positioning boss 3 due to the unilateral limit. On the one hand, it increases the fixing points of the bracket, increases the connection stability, makes the motor run more smoothly, and reduces noise. On the other hand, by increasing the size of the contact surface between the gear shaft 12 and the bracket, the support of the gear shaft 12 is effectively improved, and the damage to the gear shaft 12 caused by uneven force and internal stress during gear operation is reduced.

[0037] The limiting boss 2 and the positioning boss 3 are preferably integrally formed, and the upper end of the positioning boss 3 is butted against the contact end surface of the limiting boss 2, and the two are integrated into a boss structure with an annular upper portion and a notch at the lower portion.

[0038] like Figure 3 As shown, the cross section of the annular inner side surface 201 in this embodiment is circular, that is, the inner circumference of the limiting boss 2 is annular, and the limiting boss 2 is in surface contact with the gear shaft 12. The circular inner circumference can effectively reduce the friction damage of the edges to the gear shaft 12. The inner diameter of the limiting boss 2 is preferably the same as the inner diameter of the positioning boss 3.

[0039] In a further design, the end of the limiting boss 2 away from the positioning boss 3 has an oil storage tank 9, and the oil storage tank 9 cooperates with the gear to form an oil storage cavity 10. The oil storage tank 9 can play a role in gear lubrication during subsequent operation, such as Figure 6 and Figure 7 As shown, the end of the gear has a chamfer, and the chamfer and the oil storage tank 9 form an oil storage chamber 10. The oil storage chamber 10 can always have grease between the gear and the gear shaft 12 to fill the gap and reduce the sound generated by the collision between the gear and the shaft. The presence of grease can also be transmitted to the meshing between the teeth to reduce the gear noise when the motor is running. Preferably, the inner peripheral surface of the oil storage tank 9 is a conical surface that expands and extends from the annular inner side surface 201 to the end surface.

[0040] Embodiment 2

[0041] The difference between this embodiment and the first embodiment is that the cross section of the annular inner side surface 201 is a polygon, that is, the inner circumference of the limiting boss 2 is a polygon. At this time, the limiting boss 2 is in line contact with the gear shaft 12. To ensure structural symmetry, the cross section of the annular inner side surface 201 is preferably a regular polygon. Figure 8 As shown, the inner circumferential surface of the limiting boss 2 is a regular hexagon, and the oil storage tank 9 is also the inner side surface of the regular hexagon. It can accommodate more grease while limiting the position, ensuring the stability of the gear shaft 12 while being better lubricated by grease, thereby achieving noise reduction.

[0042] Embodiment 3

[0043] On the basis of Example 1 or Example 2, Figure 6 and Figure 7 As shown, the end of the limiting boss 2 away from the oil storage tank 9 is provided with a chamfer 11, which is convenient for installation and effectively prevents the bracket and the gear shaft 12 from colliding with each other during installation, thereby avoiding damage to the appearance of the bracket. On the other hand, it is convenient for parts manufacturing and demoulding to improve efficiency.

[0044] Similarly, a chamfer 11 is provided on an end surface of the positioning boss 3 away from the limiting boss 2 .

[0045] To ensure the strength of the limiting boss 2, the height of the limiting boss 2 cannot be too small. To avoid interference during assembly, the height of the limiting boss 2 cannot be too large. As a preferred embodiment, Figure 5 As shown, the height A of the limiting boss 2 is 1 mm to 1.5 mm.

[0046] The limiting boss 2 is located above the positioning boss 3, and an interference gear 8 is provided at the notch of the positioning boss 3. The interference gear 8 refers to a gear that interferes with the positioning boss 3 and causes the notch of the positioning boss 3. Therefore, the interference gear 8 is located below the limiting boss 2. In order to avoid the gear from getting stuck after the whole machine is riveted, it is preferred that Figure 6 As shown, the end surface distance B between the limiting boss 2 and the gear located below the limiting boss 2 is 0.2 mm to 0.3 mm.

[0047] Embodiment 4

[0048] A motor comprises the above-mentioned bracket. The motor can be applied to high-end equipment and can reduce the noise of the high-end equipment using the stepper motor.

[0049] In the description of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0051] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A bracket for mounting and positioning a gear, characterized in that: include: The support body (1) has a positioning boss (3) that cooperates with the gear shaft (12); the positioning boss (3) is an open-loop structure; The limiting boss (2) is mounted on an end of the positioning boss (3) away from the bracket body (1), and is provided with an annular inner side surface (201) that contacts and cooperates with the gear shaft (12).

2. The bracket according to claim 1, characterized in that: An end of the limiting boss (2) away from the positioning boss (3) is provided with an oil storage groove (9), and the oil storage groove (9) cooperates with the gear to form an oil storage cavity (10).

3. The bracket according to claim 2, characterized in that: The end of the limiting boss (2) away from the oil storage tank (9) is provided with a chamfer (11).

4. The bracket according to claim 2, characterized in that: The inner peripheral surface of the oil storage groove (9) is a conical surface that expands and extends from the annular inner side surface (201) toward the end surface.

5. The bracket according to claim 1, characterized in that: The cross section of the annular inner side surface (201) is circular.

6. The bracket according to claim 1, characterized in that: The cross section of the annular inner side surface (201) is a polygon.

7. The bracket according to claim 6, characterized in that: The cross section of the annular inner side surface (201) is a regular polygon.

8. The bracket according to claim 5, characterized in that: The inner diameter of the limiting boss (2) is the same as the inner diameter of the positioning boss (3).

9. The bracket according to claim 1, characterized in that: The limiting boss (2) and the positioning boss (3) are integrally formed.

10. The bracket according to claim 1, characterized in that: The end surface of the positioning boss (3) away from the limiting boss (2) is provided with a chamfer (11).

11. The bracket according to claim 1, characterized in that: The height A of the limiting boss (2) is 1 mm to 1.5 mm.

12. The bracket according to claim 1, characterized in that: The end surface distance B between the limiting boss (2) and the gear located below the limiting boss (2) is 0.2 mm to 0.3 mm.

13. A motor, characterized in that: Comprising the stent according to any one of claims 1-12.

Images