Small motor casing

Abstract

The utility model provides a small motor casing, and belongs to the technical field of motors. The problem that the position of an existing motor is inconvenient to adjust is solved. The small motor shell comprises a machine barrel, an end cover fixed at the upper end of the machine barrel and a bottom plate arranged below the machine barrel, a plurality of bolt holes vertically penetrate through the bottom plate, a positioning barrel coaxially arranged with the machine barrel is fixed at the lower end of the machine barrel, and the positioning barrel is located between the bottom plate and the machine barrel; external threads are arranged on the positioning barrel, a first threaded hole for the positioning barrel to be screwed in is formed in the bottom plate, a through hole vertically penetrates through the bottom wall of the first threaded hole, a second threaded hole right opposite to the through hole vertically penetrates through the bottom wall of the positioning barrel, a screw is arranged in the through hole, the rod part of the screw is screwed in the second threaded hole, and the head part of the screw is tightly pressed on the bottom plate. The small motor casing is convenient for position adjustment.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors and relates to a small motor, in particular to a small motor casing. Background Art

[0002] An electric motor is a device that converts electrical energy into mechanical energy. Its structure is as disclosed in the Chinese Patent Library, an electric control structure of a motor for a sewing machine (application number: 201820689187.4), which includes a bottom plate, the top surface of which is fixedly connected to one end of a motor body, a top cover is provided on the other end of the motor body, the top cover is fixed to the other end surface of the motor body by a first bolt, and a rotating shaft is provided at the center of the other end surface of the motor body, a fixing hole is provided at the corner of the bottom plate, a first groove is provided at the center of the bottom surface of the bottom plate, a mounting plate is provided in the first groove, the mounting plate is fixed in the first groove by a second bolt, and a second groove is provided at the center of the mounting plate, a claw-type rubber sleeve is fixedly provided in the second groove, the claw-type rubber sleeve includes a connecting rib and a connecting claw, and a strip positioning hole is also provided on the mounting plate.

[0003] The above-mentioned motor is fixed on the mounting surface by means of a bottom plate. During actual installation, the motor may be slightly forward or backward after installation. In this case, it is necessary to add a gasket or grind the mounting surface for adjustment, which is inconvenient to operate. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a small motor casing which is convenient for adjusting the position height.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a small motor casing, including a barrel, an end cover fixed to the upper end of the barrel and a bottom plate arranged below the barrel, and a plurality of bolt holes are vertically penetrated on the bottom plate, characterized in that a positioning barrel coaxially arranged with the barrel is fixed to the lower end of the barrel, and the positioning barrel is located between the bottom plate and the barrel; the positioning barrel is provided with an external thread, and a threaded hole 1 for the positioning barrel to be screwed into the bottom plate is provided, a through hole is vertically penetrated on the bottom wall of the threaded hole 1, and a threaded hole 2 arranged opposite to the through hole is vertically penetrated on the bottom wall of the positioning barrel, a screw is provided in the through hole, the screw rod is screwed into the threaded hole 2, and the screw head is pressed tightly against the bottom plate.

[0006] During actual installation, the bottom plate cooperates with the bolts and bolt holes to stably position the motor as a whole on the mounting table.

[0007] When the height of the motor needs to be adjusted, first unscrew the screw, then slightly turn the barrel to move the motor to the required position, and then re-screw the screw to lock the motor stably on the base plate. In other words, the present application only needs to turn the screw and the barrel to adjust the position height of the motor, without the need for external components or machining, so as to effectively reduce the difficulty of adjustment, and has the advantages of convenience and ease of use.

[0008] In the above-mentioned small motor housing, the barrel includes a barrel and a boss formed on the bottom surface of the barrel. The boss is annular and coaxial with the barrel, and the inner hole of the boss is connected to the inner cavity of the barrel. The boss is between the positioning barrel and the barrel, and the positioning barrel is fixedly connected to the boss. The motor shaft is vertically arranged in the barrel, and the lower end of the shaft extends into the boss, and a bearing is arranged in the boss to support the shaft rotation on the boss. In actual products, the stator and rotor components of the motor are both arranged in the barrel.

[0009] The lower bearing of the motor is arranged outside the boss so that there is a certain distance between the bearing and the inner cavity of the cylinder, which is beneficial to the heat dissipation of the bearing and prolongs its service life.

[0010] In the above-mentioned small motor casing, the upper end of the boss is trapezoidal, and the outer diameter of the upper end of the boss gradually increases from top to bottom, so that the boss can more stably support the cylinder and ensure the overall positioning strength and stability of the motor.

[0011] In the above-mentioned small motor casing, the barrel is a cast integral part.

[0012] In the above-mentioned small motor housing, the inner hole of the boss is a stepped hole, which is composed of small holes and large holes continuously distributed from top to bottom. The above-mentioned bearing is in the large hole, and the upper end of the outer ring of the bearing is pressed on the bottom wall of the large hole. The inner hole of the boss is set as a stepped hole, so that the bearing can be pressed into place at one time, which is convenient for assembly.

[0013] In the above-mentioned small motor casing, the boss and the positioning barrel are welded and fixedly connected.

[0014] In the above-mentioned small motor housing, an annular groove coaxial with the cylinder is provided on the bottom surface of the boss, and a convex ring matching the annular groove is formed on the top surface of the positioning barrel, and the convex ring is inserted into the annular groove. The convex ring cooperates with the annular groove to guide and pre-position the positioning barrel installation, which is convenient for subsequent positioning.

[0015] In the above-mentioned small motor housing, the axial cross section of the annular groove is L-shaped, and the convex ring is pressed on the bottom surface of the outer ring of the bearing. The convex ring is used for both installation guidance and pre-positioning of the positioning barrel and axial limiting of the bearing, that is, in this application, the convex ring has a dual-purpose effect, which simplifies the structure and facilitates assembly.

[0016] Compared with the prior art, this small motor casing has the following advantages:

[0017] 1. The present application can adjust the motor position height by simply turning the screws and the barrel, without the need for external components or machining, thereby effectively reducing the difficulty of adjustment, and has the advantages of being easy and convenient to use.

[0018] 2. The convex ring is used for installation guidance and pre-positioning of the positioning barrel, and is also used for axial limiting of the bearing. That is, in this application, the convex ring has a dual purpose effect, which simplifies the structure and facilitates assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of a small electric motor casing.

[0020] Figure 2 It is a schematic cross-sectional view of a small electric motor casing.

[0021] Figure 3 yes Figure 2 A magnified schematic diagram of center A.

[0022] Figure 4 It is a structural diagram of a positioning barrel.

[0023] In the figure, 1, barrel; 1a, cylinder body; 1b, boss; 1b1, small hole; 1b2, annular groove; 2, end cover; 3, bottom plate; 3a, bolt hole; 3b, through hole; 3c, threaded hole one; 4, positioning barrel; 4a, convex ring; 4b, threaded hole two; 5, screw; 6, rotating shaft; 7, bearing; 7a, outer ring. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1 As shown, the casing of the small motor includes a barrel 1, an end cover 2 fixed to the upper end of the barrel 1, and a bottom plate 3 arranged below the barrel 1.

[0026] in,

[0027] A plurality of bolt holes 3 a are vertically penetrated through the bottom plate 3 . In actual products, the length of the bottom plate 3 extends radially along the barrel 1 , and the bolt holes 3 a are arranged around the bottom plate 3 .

[0028] like Figures 2 to 4As shown, a positioning barrel 4 coaxially arranged with the barrel 1 is fixed at the lower end of the barrel 1, and the positioning barrel 4 is located between the bottom plate 3 and the barrel 1. The positioning barrel 4 is provided with an external thread, and the bottom plate 3 is provided with a threaded hole 1 3c for the positioning barrel 4 to be screwed in, and a through hole 3b is vertically penetrated on the bottom wall of the threaded hole 1 3c. The upper end of the positioning barrel 4 is open, and a threaded hole 2 4b arranged opposite to the through hole 3b is vertically penetrated on the bottom wall of the positioning barrel 4. A screw 5 is arranged in the through hole 3b, and the rod of the screw 5 is screwed into the threaded hole 2 4b, and the head of the screw 5 is pressed tightly against the bottom plate 3.

[0029] During actual installation, the bottom plate 3 cooperates with the bolt holes 3a to stably position the entire motor on the mounting platform.

[0030] When the height of the motor needs to be adjusted, first unscrew the screw 5, then slightly rotate the barrel 1 to move the motor to the required position, and then re-screw the screw 5 to stably lock the motor on the base plate 3. In other words, the present application only needs to rotate the screw 5 and the barrel 1 to adjust the position height of the motor, without the need for external components or machining, so as to effectively reduce the difficulty of adjustment, and has the advantages of convenience and ease of use.

[0031] In this embodiment,

[0032] like Figure 2 As shown, the structure of the barrel 1 is as follows: the barrel 1 includes a barrel 1a and a boss 1b formed on the bottom surface of the barrel 1a, the boss 1b is annular and coaxial with the barrel 1a, and the inner hole of the boss 1b is connected to the inner cavity of the barrel 1a. The boss 1b is between the positioning barrel 4 and the barrel 1a, and the positioning barrel 4 is fixedly connected to the boss 1b. The rotating shaft 6 of the motor is vertically arranged in the barrel 1a, and the lower end of the rotating shaft 6 extends into the boss 1b, and the boss 1b is provided with a bearing 7 that supports the rotating shaft 6 on the boss 1b. In the actual product, the stator and rotor assemblies of the motor are both arranged in the barrel 1a, and the lower side bearing 7 of the motor is arranged outside the boss 1b, so that there is a certain distance between the bearing 7 and the inner cavity of the barrel 1a, which is conducive to the heat dissipation of the bearing 7 and prolongs the service life. Further explanation, the upper end of the boss 1b is trapezoidal, and the outer diameter of the upper end of the boss 1b gradually increases from top to bottom, so that the boss 1b can more stably support the barrel 1a, ensuring the overall positioning strength and stability of the motor. Preferably, the barrel 1 is a cast integral part.

[0033] like Figure 2 and Figure 3As shown, the inner hole of the boss 1b is a stepped hole, which is composed of small holes 1b1 and large holes that are continuously distributed from top to bottom. The above-mentioned bearing 7 is in the large hole. The bearing 7 is a common ball bearing 7. The bearing 7 includes an inner ring and an outer ring 7a, and the upper end of the outer ring 7a of the bearing 7 is pressed on the bottom wall of the large hole. The inner hole of the boss 1b is set as a stepped hole, so that the bearing 7 can be pressed into place at one time, which is convenient for assembly. In the actual product, the inner ring and outer ring 7a of the bearing 7 are respectively fixed to the rotating shaft 6 and the boss 1b by interference fit.

[0034] The boss 1b and the positioning barrel 4 are welded and fixedly connected. To further explain, the boss 1b is provided with an annular groove 1b2 coaxial with the cylinder 1a on the bottom surface, and a convex ring 4a matching the annular groove 1b2 is formed on the top surface of the positioning barrel 4, and the convex ring 4a is inserted into the annular groove 1b2. The convex ring 4a cooperates with the annular groove 1b2 to guide and pre-position the positioning barrel 4 for subsequent positioning.

[0035] Furthermore, the axial cross section of the annular groove 1b2 is L-shaped, and the convex ring 4a is pressed on the bottom surface of the outer ring 7a of the bearing 7. The convex ring 4a is used for both installation guidance and pre-positioning of the positioning barrel 4 and axial limiting of the bearing 7, that is, in the present application, the convex ring 4a has a dual-purpose effect, which simplifies the structure and facilitates assembly.

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A small motor casing, comprising a barrel (1), an end cover (2) fixed to the upper end of the barrel (1), and a bottom plate (3) arranged below the barrel (1), wherein a plurality of bolt holes (3a) are vertically penetrated through the bottom plate (3), characterized in that: A positioning barrel (4) coaxially arranged with the barrel (1) is fixed at the lower end of the barrel (1), and the positioning barrel (4) is located between the bottom plate (3) and the barrel (1); the positioning barrel (4) is provided with an external thread, the bottom plate (3) is provided with a threaded hole (3c) for the positioning barrel (4) to be screwed into, a through hole (3b) vertically penetrates the bottom wall of the threaded hole (3c), a threaded hole (4b) vertically penetrates the bottom wall of the positioning barrel (4) and is arranged opposite to the through hole (3b), a screw (5) is provided in the through hole (3b), the rod of the screw (5) is screwed into the threaded hole (4b), and the head of the screw (5) is tightly pressed against the bottom plate (3).

2. The small motor housing according to claim 1, characterized in that: The barrel (1) comprises a barrel (1a) and a boss (1b) formed on the bottom surface of the barrel (1a); the boss (1b) is annular and coaxial with the barrel (1a), and the inner hole of the boss (1b) is connected to the inner cavity of the barrel (1a); the boss (1b) is located between the positioning barrel (4) and the barrel (1a), and the positioning barrel (4) is fixedly connected to the boss (1b); the rotating shaft (6) of the motor is vertically arranged in the barrel (1a), the lower end of the rotating shaft (6) extends into the boss (1b), and a bearing (7) is provided in the boss (1b) for supporting the rotating shaft (6) rotatably on the boss (1b).

3. The small motor housing according to claim 2, characterized in that: The upper end of the boss (1b) is trapezoidal, and the outer diameter of the upper end of the boss (1b) gradually increases from top to bottom.

4. The small motor housing according to claim 2 or 3, characterized in that: The barrel (1) is a cast one-piece part.

5. The small motor housing according to claim 2 or 3, characterized in that: The inner hole of the boss (1b) is a stepped hole, which is composed of small holes (1b1) and a large hole that are continuously distributed from top to bottom. The bearing (7) is located in the large hole, and the upper end of the outer ring (7a) of the bearing (7) is pressed against the bottom wall of the large hole.

6. The small motor housing according to claim 2 or 3, characterized in that: The boss (1b) and the positioning barrel (4) are fixedly connected by welding.

7. The small motor housing according to claim 6, characterized in that: An annular groove (1b2) coaxial with the cylinder (1a) is formed on the bottom surface of the boss (1b), and a convex ring (4a) matching the annular groove (1b2) is formed on the top surface of the positioning barrel (4), and the convex ring (4a) is inserted into the annular groove (1b2).

8. The small motor housing according to claim 7, characterized in that: The axial cross section of the annular groove (1b2) is L-shaped, and the convex ring (4a) is pressed against the bottom surface of the outer ring (7a) of the bearing (7).

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