CN203251174U - Stepper motor with waterproof function - Google Patents

Abstract

The utility model relates to the technical field of stepping motors, in particular to a stepping motor with waterproof function. This waterproof stepper motor is equipped with a rubber ring, a friction seal, a rubber seal bowl, a metal retaining ring, a helical compression spring, a pressure positioning ring and a large friction seal between the shaft and the end cover. Sleeved on the output shaft, the front end of the rubber ring is provided with a friction seal, the outer circle of the rubber ring is provided with a helical compression spring, and both ends of the helical compression spring are provided with metal retaining rings, and the cavity of the end cover is provided with The rubber sealing bowl is provided with a large frictional sealing sheet at the front end of the rubber sealing bowl. A special stepper motor end cover with a high-protection mechanical seal ring is installed at the outlet shaft of the end cover. The mechanical protection seal ring seals the rotating shaft of the motor. In addition, the connection between the end cover and the casing of the stepper motor is sealed. Effective protection design, so as to improve the protection level of the stepping motor, realize the waterproof function of the stepping motor, and achieve the deep water working function of the stepping motor.

Description

Stepper motor with waterproof function

technical field

The utility model relates to an end cover of a stepping motor, in particular to a stepping motor with waterproof function.

Background technique

At present, stepper motors are widely used in industries such as automatic control, stage lighting, textile machinery, medical equipment, and mechanical processing. Due to the high machining accuracy and small step angle of stepper motors, they are high-precision motors and require relatively high environmental conditions. high. With the development of applied science and technology, some chemical industries with harsh environmental conditions, underwater monitoring instruments, etc. also need to use high-precision stepper motors, because the protection level of the current stepper motor mechanical structure is not high, as shown in Figure 1 As shown, its structure does not have a waterproof structure, so if the current stepper motor is used in a harsh environment, water vapor and corrosive gases will often enter the motor from the shaft and end cover of the motor, causing the internal parts of the motor to be corroded , the rotor magnet of the motor is oxidized, resulting in a decrease in motor performance, a stuck rotor, a reduction in the insulation level of the motor coil, and a breakdown or short circuit inside the coil, etc. Big loss. Especially there is no stepper motor working in deep water both at home and abroad. How to improve the protection level of the stepping motor so that the stepping motor can work in deep water is an urgent problem to be solved.

In the prior art, it is found that most of the water or water vapor basically penetrates into the motor at the connection between the shaft of the stepping motor and the connection between the end cover and the casing of the stepping motor at home and abroad, especially The problem of water seepage in the rotating shaft cannot be solved well, and the seepage in other places can be solved with corresponding anti-seepage measures. Therefore, solving the problem of water infiltration at the shaft outlet of the stepping motor and the connection between the end cover and the casing and taking corresponding measures will greatly improve the protection level of the stepping motor and enable the stepping motor to be used in harsh environments. Among them, such as chemical industry, field operation, deep underwater work and so on.

Contents of the invention

The technical problem to be solved by the utility model is: the protection level of the current stepping motor is low, does not have various specific protective measures, and cannot work in deep water areas or in various liquids, and a stepping motor with waterproof function is provided .

In order to overcome the defects in the background technology, the technical solution adopted by the utility model to solve the technical problems is: the overall structure includes the casing, the output shaft and the end cover, and a rubber ring and a friction seal are arranged between the output shaft and the end cover. sheet, rubber sealing bowl, metal retaining ring, helical compression spring, pressure positioning ring and large friction sealing sheet. The rubber ring is tightly sleeved on the output shaft. A helical compression spring is provided on the top, and metal retaining rings are provided at both ends of the helical compression spring. A rubber sealing bowl is provided in the cavity of the end cover, and a large frictional sealing sheet is provided at the front end of the rubber sealing bowl.

According to another embodiment of the present invention, it further includes that at least one rubber sealing ring is provided between the casing and the end cover.

According to another embodiment of the present invention, a sealant layer is further provided between the casing and the end cover.

The beneficial effects of the utility model are: the utility model adopts a mechanical sealing device with high waterproof performance at the end cover of the stepping motor, and a sealing device between the end cover and the casing. This structure changes the existing stepping motor. There is no high-protection conventional structure at the rotating shaft of the input motor. A special stepping motor end cover with a high-protection mechanical seal ring is installed at the shaft of the end cover. The mechanical protection sealing ring seals the rotating shaft of the motor. The connection between the end cover and the casing is effectively protected, so as to improve the protection level of the stepper motor, realize the waterproof function of the stepper motor, and achieve the deep water working function of the stepper motor. The utility model has the advantages of advanced design structure, scientific, reasonable and reliable protective sealing structure, and good manufacturability. It is a new type of stepping motor protection structure, which can be applied to various stepping motor structures and has a wide range of applications.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the structural representation of existing stepper motor;

Fig. 2 is a structural representation of the utility model;

Fig. 3 is a schematic diagram of the sealing structure in Fig. 2;

Fig. 4 is a schematic diagram of another sealing structure in Fig. 2;

Fig. 5 is a schematic diagram of another sealing structure in Fig. 2

Figure 6 is a schematic diagram of another sealing structure in Figure 2

Among them: 1. Exit shaft, 2. Rubber ring, 3. End cover, 4. Friction seal, 5. Rubber seal bowl, 6. Metal retaining ring, 7. Helical compression spring, 8. Seepage-proof surface, 9. Friction Anti-seepage surface, 10, pressure positioning ring, 11, wipe sealing sheet, 12, sealant layer, 13, casing, 14, rubber sealing ring.

Detailed ways

As shown in Figure 2 and Figure 3, this stepper motor with waterproof function includes a casing 13, one end of the casing 13 is provided with an end cover 3, the end cover 3 is connected to the output shaft 1, and the output shaft 1 and the end cover 3 There are rubber rings 2, friction sealing sheets 4, rubber sealing bowls 5, metal retaining rings 6, helical compression springs 7, pressure positioning rings 10 and large friction sealing sheets 11, and these components form a sealing ring assembly.

The rubber ring 2 is tightly sleeved on the output shaft 1. When the motor shaft rotates, it is relatively fixed and has an interference fit. Water cannot enter the interior of the mechanical seal from the anti-seepage surface 8 of the output shaft 1 and the rubber ring 2, which plays a waterproof role.

The front end of the rubber ring 2 is provided with a friction sealing sheet 4, the outer circle of the rubber ring 2 is provided with a helical compression spring 7, and the two ends of the helical compression spring 7 are provided with a metal retaining ring 6, and the cavity of the end cover 3 is provided with The rubber sealing bowl 5, the front end of the rubber sealing bowl 5 is provided with a large friction sealing sheet 11. The rubber sealing bowl 5 and the end cover 3 are relatively static, and the contact surface between the rubber sealing bowl 5 and the end cover 3 is an interference and anti-seepage matching surface, which plays a waterproof role.

The end faces of the friction sealing sheet 4 and the large friction sealing sheet 11 are in contact with each other to form a frictional anti-seepage surface 9 between the friction sealing sheet 4 and the large friction sealing sheet 11. Generate pressure, which can generate an appropriate pressure on the large friction sealing plate 11, so that the friction and anti-seepage surface 9 between the friction sealing plate 4 and the large friction sealing plate 11 is tightly attached, and the friction sealing plate 4 is rubbed when the output shaft 1 rotates Following the rotation, the large friction sealing sheet 11 does not move, and the friction sealing sheet 4 and the large friction sealing sheet 11 rotate relatively, but the friction and anti-seepage surface 9 is under pressure, and water cannot enter the motor from the friction and anti-seepage surface 9. It plays a waterproof role, thus forming a rotary mechanical seal. This structure makes it impossible for water and liquid to enter the interior of the motor from the outside of the motor, especially when the output shaft 1 rotates, water and liquid cannot enter the interior of the motor from the outside of the motor, thereby producing a sealing protection for the motor. The pressure positioning ring 10 can adjust the pressure of the helical compression spring 7, and can control the frictional seepage-proof surface 9 to prevent water seepage in the deep water working state, so as to achieve the anti-seepage and waterproof effect of the stepping motor, and can work in deep water.

As shown in FIG. 4 and FIG. 5 , at least one rubber sealing ring 14 is provided between the casing 13 and the end cover 3 , and the rubber sealing ring 14 makes the casing 13 and the end cover 3 achieve anti-leakage effect.

As shown in FIG. 6 , a sealant layer 12 can also be provided between the casing 13 and the end cover 3 , so that the casing 13 and the end cover 3 can achieve the anti-leakage effect.

The utility model adopts the design of a mechanical seal device with high waterproof performance at the end cover of the stepping motor and the sealing device between the end cover and the casing. Conventional structure of protection, a special stepper motor end cover with a high-protection mechanical seal ring is installed at the shaft of the end cover, and the mechanical protection seal ring seals the motor rotating shaft Effective protection design is carried out at the connection of the stepper motor, so as to improve the protection level of the stepper motor, realize the waterproof function of the stepper motor, and achieve the deep water working function of the stepper motor. The utility model has the advantages of advanced design structure, scientific, reasonable and reliable protective sealing structure, good manufacturability, etc. It is a new type of stepping motor protective structure, and its application range is wide.

Claims (3)

1. stepping motor with water-proof function, comprise casing (13), casing (13) one ends are provided with end cap (3), connect shaft (1) in the end cap (3), it is characterized in that: between shaft (1) and end cap (3), be provided with rubber ring (2), friction sealed (4), rubber sealing cup (5), metal collar (6), spiral compression spring (7), pressure centring ring (10) and large friction sealed (11), described rubber ring (2) closely is sheathed on the shaft (1), the front end of rubber ring (2) is provided with friction sealed (4), the cylindrical of rubber ring (2) is provided with spiral compression spring (7), and the two ends of spiral compression spring (7) are provided with metal collar (6), be provided with rubber sealing cup (5) in the die cavity of described end cap (3), the front end of rubber sealing cup (5) is provided with large friction sealed (11).

2. the stepping motor with water-proof function as claimed in claim 1 is characterized in that: be provided with 1 rubber seal (14) between described casing (13) and the end cap (3) at least.

3. the stepping motor with water-proof function as claimed in claim 1 is characterized in that: be provided with sealant layer (12) between described casing (13) and the end cap (3).

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