Front end cover connecting structure of small motor

Abstract

The utility model relates to the technical field of motor equipment, and discloses a front end cover connecting structure of a small motor, which comprises a motor casing and a front end cover, the front end cover is provided with a convex spigot, the motor casing is internally provided with a concave spigot matched with the convex spigot, the side wall of the convex spigot is provided with a convex block, the inner wall of the concave spigot is provided with a mounting groove corresponding to the convex block, and the convex spigot is provided with a through hole. The lower end of the installation groove extends towards one side to form a clamping groove capable of containing the protruding block. The boss of the front end cover is matched with the clamping groove of the motor shell, so that the front end cover is connected with the motor shell, the shell does not need to be thickened or a flange surface is not added at the end part of the shell, a connecting bolt is omitted, the processing cost and the weight of the small motor are reduced, and the small motor is convenient to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the technical field of motor equipment, in particular to a front end cover connection structure of a small motor. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. Small motors are widely used in medical devices because of their small size. A motor generally includes a housing and a rotor installed in the housing. A motor front cover is installed at the front end of the housing to protect the inside of the motor body.

[0003] However, at present, most motor housings and front end covers are connected by bolts, which requires the design of bolt holes on the motor housing. One way is to set the bolt holes by increasing the thickness of the housing, and the other way is to increase the flange surface corresponding to the end cover at the end of the housing to ensure the position of the bolt holes. However, both methods increase the weight of the housing and the processing cost of small motors. In addition, the bolt connection method also has the disadvantage of inconvenient installation and disassembly. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a front end cover connection structure for a small motor, which has a simple structure, reduces the overall weight of the motor, saves costs, and is easy to install and disassemble.

[0005] The purpose of the utility model is achieved through the following technical scheme: a front end cover connection structure of a small motor, including a motor casing and a front end cover, the front end cover is provided with a convex stopper, the motor casing is provided with a concave stopper matching with the convex stopper, the side wall of the convex stopper is provided with a boss, the inner wall of the concave stopper is provided with an installation groove corresponding to the boss, and the lower end of the installation groove extends to one side with a slot matching with the boss.

[0006] The principle of the utility model is as follows: when installing the front end cover, align the boss of the front end cover with the mounting groove of the casing and vertically install it into the casing, so that the boss is placed in the mounting groove, and the convex stopper and the concave stopper have a small tolerance for clearance fit, so that the motor casing and the front end cover can bite and connect with each other, and the front end cover is screwed manually or with a tightening tool so that the boss is inserted into the slot, and a pre-tightening force is generated by squeezing between the casing slot and the boss, thereby realizing the connection between the front end cover and the motor casing; when disassembly is required, the front end cover can be taken out after the boss exits the slot by screwing it in the opposite direction.

[0007] Furthermore, the upper end surface of the boss and the upper end surface of the slot are arranged inclined.

[0008] Furthermore, more than two bosses and mounting grooves are respectively arranged along the circumference of the convex stopper and the concave stopper.

[0009] Furthermore, an anti-loosening pad is provided between the motor housing and the front end cover, and the anti-loosening pad is provided with a groove corresponding to the installation groove.

[0010] Furthermore, the material of the anti-loosening gasket is one of silicone rubber, nitrile rubber, hydrogenated nitrile rubber, fluorine rubber, fluorosilicone rubber, EPDM rubber, chloroprene rubber, butyl rubber, acrylic rubber, natural rubber, and polyurethane rubber.

[0011] Furthermore, there is at least one anti-loosening pad.

[0012] Furthermore, a contact surface between the anti-loosening pad and the motor housing is provided with a protrusion, and an upper end surface of the motor housing is provided with a positioning groove matching the protrusion.

[0013] Furthermore, the end surface of the front end cover is also provided with a mounting hole.

[0014] The beneficial effects of the utility model are: 1. The front end cover is installed and connected to the motor casing by matching the boss of the front end cover with the slot in the motor casing, without thickening the casing or adding a flange surface at the end of the casing, thus eliminating the need for connecting bolts, reducing the processing cost and weight of small motors, and facilitating installation and disassembly; 2. An anti-loosening gasket is arranged between the motor casing and the front end cover, and a pre-tightening force is generated between the anti-loosening gasket and the mating surface to prevent the front end cover from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the motor housing in the utility model;

[0018] Figure 3 It is a structural schematic diagram of the front end cover in the utility model;

[0019] Figure 4 It is a schematic diagram of the front end cover in another viewing angle of the present invention.

[0020] In the figure: 1. front cover; 1001. mounting hole; 1002. convex stopper; 1003. boss; 2. anti-loosening pad; 2001. groove; 3. motor housing; 3001. mounting slot; 3002. slot; 3003. concave stopper. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0022] like Figures 1 to 4 As shown, a front end cover connection structure of a small motor includes a motor housing 3 and a front end cover 1, the front end cover 1 is provided with a convex stop 1002, the motor housing 3 is provided with a concave stop 3003 that cooperates with the convex stop 1002, the side wall of the convex stop 1002 is provided with a boss 1003, the inner wall of the concave stop 3003 is provided with a mounting groove 3001 corresponding to the boss 1003, and the lower end of the mounting groove 3001 extends to one side with a slot 3002 that cooperates with the boss 1003.

[0023] In the present utility model, if Figure 2 As shown, the slot 3002 at the lower end of the mounting slot 3001 can be extended in the clockwise direction or in the counterclockwise direction. In order to adapt to actual production, it is preferably set in the clockwise direction. The height of the slot 3002 matches the height of the boss 1003, so that the boss 1003 can form a good match with the slot 3002 to generate a warning force to prevent the front cover 1 from loosening out of the slot 3002.

[0024] When installing the front end cover 1, align the boss 1003 of the front end cover 1 with the installation groove 3001 of the casing and vertically install it into the casing, so that the boss 1003 is placed in the installation groove 3001, and the convex stop 1002 and the concave stop 3003 have a small tolerance for clearance fit, so that the motor casing 3 and the front end cover 1 can bite and connect with each other, manually or by using a tightening tool to screw the front end cover 1, so that the boss 1003 is stuck in the slot 3002, and the casing slot 3002 and the boss 1003 are squeezed to generate a pre-tightening force, so that the front end cover 1 is connected to the motor casing 3; when it needs to be disassembled, the boss 1003 can be removed after exiting the slot 3002 by screwing the front end cover 1 in the opposite direction. The connection method of the utility model saves bolts, reduces the weight and processing cost of the motor, and does not need to install and disassemble multiple connecting bolts, which is simpler and more convenient to use.

[0025] In order to ensure the tightening force between the front end cover 1 and the casing and increase the contact area between the front end cover 1 and the casing after installation, the upper end surface of the boss 1003 and the upper end surface of the slot 3002 are inclined, specifically, they are inclined downward in the tightening direction. To ensure the tightening effect, the upper end surface of the boss 1003 and the upper end surface of the slot 3002 have the same inclination, and the circumferential length of the slot 3002 is longer than that of the boss 1003. When screwing the front end cover 1, the more the boss 1003 rotates inwardly into the slot 3002, the tighter the boss 1003 and the slot 3002 fit together, forming a better warning force.

[0026] More than two bosses 1003 and mounting grooves 3001 are respectively arranged circumferentially along the convex stop 1002 and the concave stop 3003. Specifically, 2, 3, 4, 5, etc., may be arranged respectively. To ensure the connection stability, it is preferred that the bosses 1003 and the mounting grooves 3001 are evenly arranged along the circumferential direction. When the number of the bosses 1003 and the mounting grooves 3001 is 2, the bosses 1003 and the mounting grooves 3001 are respectively arranged relatively to each other; in the present embodiment, 3 bosses 1003 and 3001 are correspondingly arranged, which are respectively evenly arranged circumferentially along the convex stop 1002 and the concave stop 3003, thereby ensuring the stable connection between the front end cover 1 and the motor housing 3, and avoiding the increase of processing costs due to too many arrangements.

[0027] like Figure 1 As shown, an anti-loosening pad 2 is also provided between the motor housing 3 and the front end cover 1. The anti-loosening pad 2 is provided with a groove corresponding to the installation groove 3001, so that the boss 1003 can be aligned and placed when the front end cover 1 is installed. The anti-loosening pad 2 is a silicone rubber anti-loosening pad, a nitrile rubber anti-loosening pad, a hydrogenated nitrile rubber anti-loosening pad, a fluorine rubber anti-loosening pad, a fluorosilicone rubber anti-loosening pad, an EPDM rubber anti-loosening pad, a chloroprene rubber anti-loosening pad, a butyl rubber anti-loosening pad, an acrylic rubber anti-loosening pad, a natural rubber anti-loosening pad, or a polyurethane rubber anti-loosening pad. Specifically, the number of the anti-loosening pads 2 is at least 1, and a certain pre-tightening force is generated by elastic deformation after the front end cover 1 is pressed.

[0028] In order to more accurately position the anti-loosening pad 2, a protrusion is provided on the contact surface between the anti-loosening pad 2 and the motor housing 3, and a positioning groove matching the protrusion is provided on the upper end surface of the motor housing 3 (not shown in the figure). When placing the anti-loosening pad 2, accurate positioning can be achieved through the cooperation of the protrusion and the positioning groove, which saves time and makes the anti-loosening pad 2 not easy to loosen and the connection more stable.

[0029] like Figure 1 , Figure 3 As shown, in order to facilitate the screwing of the front end cover 1, the end surface of the front end cover 1 is further provided with a mounting hole 1001. At this time, the tightening tool can be screwed on the front end cover 1, which is convenient for operation.

[0030] When installing the front cover 1, first place the 2 anti-loosening pads on the upper end surface of the motor housing 3, so that the groove on the anti-loosening pad 2 corresponds to the installation groove 3001 on the motor housing 3, and then align the boss 1003 of the front cover 1 with the installation groove 3001 of the motor housing 3, and vertically install the front cover 1 into the housing. Since the slot 3002 of the motor housing 3 and the boss 1003 of the front cover 1 have the same angle of inclination, after the front cover 1 is tightened clockwise through the installation hole 1001 on the end plate by using the tightening tool, the slot 3002 and the boss 1003 will be squeezed to generate a pre-tightening force. At this time, the 2 anti-loosening pads are squeezed by the front cover 1 and the housing to produce elastic deformation and also generate a certain pre-tightening force. These two pre-tightening forces will prevent the front cover 1 from loosening. When disassembling the front cover 1, insert the tightening tool into the installation hole 1001, and loosen it counterclockwise to achieve the disassembly of the front plate, which is simple and convenient to operate. The front end cover 1 connection structure of the small motor is characterized in that a mounting hole 1001 is further provided on the end surface of the front end cover 1.

[0031] It should be understood that the embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make any various changes and modifications to the present invention, and these equivalent forms are also limited by the claims attached to this application.

Claims

1. A front end cover connection structure of a small motor, comprising a motor housing (3) and a front end cover (1), characterized in that: The front end cover (1) is provided with a convex stop (1002), a concave stop (3003) matching with the convex stop (1002) is provided in the motor housing (3), a boss (1003) is provided on the side wall of the convex stop (1002), a mounting groove (3001) corresponding to the boss (1003) is formed on the inner wall of the concave stop (3003), and a clamping groove (3002) matching with the boss (1003) is extended to one side at the lower end of the mounting groove (3001).

2. A front end cover connection structure of a small motor according to claim 1, characterized in that: The upper end surface of the boss (1003) and the upper end surface of the slot (3002) are arranged to be inclined.

3. A front end cover connection structure of a small motor according to claim 1 or 2, characterized in that: More than two bosses (1003) and mounting grooves (3001) are respectively arranged along the circumference of the convex stopper (1002) and the concave stopper (3003).

4. A front end cover connection structure of a small motor according to claim 1 or 2, characterized in that: An anti-loosening pad (2) is also provided between the motor housing (3) and the front end cover (1), and the anti-loosening pad (2) is provided with a groove corresponding to the installation groove (3001).

5. A front end cover connection structure of a small motor according to claim 4, characterized in that: The anti-loosening pad (2) is a kind of silicone rubber anti-loosening pad, nitrile rubber anti-loosening pad, hydrogenated nitrile rubber anti-loosening pad, fluorine rubber anti-loosening pad, fluorosilicone rubber anti-loosening pad, EPDM rubber anti-loosening pad, chloroprene rubber anti-loosening pad, butyl rubber anti-loosening pad, acrylic rubber anti-loosening pad, natural rubber anti-loosening pad, polyurethane rubber anti-loosening pad.

6. The front end cover connection structure of a small motor according to claim 4, characterized in that: There is at least one anti-loosening pad (2).

7. The front end cover connection structure of a small motor according to claim 4, characterized in that: The contact surface between the anti-loosening pad (2) and the motor housing (3) is provided with a protrusion, and the upper end surface of the motor housing (3) is provided with a positioning groove matching the protrusion.

8. A front end cover connection structure of a small motor according to claim 1, 2, 5, 6 or 7, characterized in that: A mounting hole (1001) is also provided on the end surface of the front end cover (1).

9. The front end cover connection structure of a small motor according to claim 3, characterized in that: A mounting hole (1001) is also provided on the end surface of the front end cover (1).

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