Circulating pump for cooling laser welding machine

Abstract

The utility model relates to a circulating pump for cooling a laser welding machine, which comprises a pump machine, a direct current motor and an impeller, the pump machine is connected with the direct current motor, a containing cavity is arranged in the pump machine, the impeller is arranged in the containing cavity, an annular scroll flow channel is formed between the radial edge of the impeller and the cavity wall of the containing cavity, and the impeller is fixed with a rotating shaft of the direct current motor. The pump machine is provided with a pump inlet and a pump outlet which are communicated with the scroll flow channel. According to the circulating pump for cooling the laser welding machine, the direct-current motor can supply energy to the pump machine, compared with a one-way asynchronous motor in the prior art, the circulating efficiency of the direct-current motor is higher, the pump machine is internally provided with the containing cavity, the impeller is located in the containing cavity, the impeller can rotate at a high speed, and the impeller rotating at the high speed can obtain energy; liquid obtains energy once when passing through the impeller once in the flow channel by means of the longitudinal vortex, the size of the circulating pump can be optimized through the matching effect of the pump machine, the direct current motor and the impeller, and the efficiency of the circulating pump is improved.

Description

Technical Field

[0001] This utility model relates to the field of laser welding machines, and in particular to a circulating pump for cooling laser welding machines. Background Technology

[0002] During the operation of an electric welding machine, losses in the windings and core generate a significant amount of heat. This heat needs to be dissipated promptly to prevent overheating and insulation damage, which could then affect the machine's normal operation. Therefore, existing welding machines typically include cooling devices. The power circulation device for the traditional electric welding machine water tank cooling system is a water pump. Traditional electric welding machine water-cooled systems use two types of circulating pumps: diaphragm pumps, typically powered by DC motors, and vortex pumps, typically powered by single-phase asynchronous motors. During operation, diaphragm pumps suffer from low head and short lifespan due to the pressure limitations of the diaphragm, while vortex pumps, powered by single-phase asynchronous motors, are large, expensive, inefficient, consume a lot of power, and are noisy. Utility Model Content

[0003] Therefore, it is necessary to provide a circulating pump for cooling laser welding machines that can optimize the pump's size and improve its efficiency.

[0004] A circulating pump for cooling a laser welding machine includes a pump, a DC motor, and an impeller. The pump is connected to the DC motor. The pump has a receiving cavity, and the impeller is located inside the receiving cavity. The radial edge of the impeller forms an annular vortex flow channel between itself and the cavity wall of the receiving cavity. The impeller is fixed to the rotating shaft of the DC motor. The pump has a pump inlet and a pump outlet that communicate with the vortex flow channel.

[0005] In the circulating pump for cooling a laser welding machine provided in this application, the pump is connected to a DC motor, which provides power to the pump. Compared with the existing unidirectional asynchronous motor, the DC motor has higher circulation efficiency. At the same time, with the same output power, the DC motor circulating pump requires less input power than the unidirectional asynchronous motor circulating pump. The pump has a receiving cavity, and the impeller is located in the receiving cavity. The impeller can rotate at high speed and obtain energy. The radial edge of the impeller and the cavity wall of the receiving cavity form an annular vortex flow channel. The liquid obtains energy once every time it passes through the impeller in the flow channel by longitudinal vortex. The impeller is fixed to the shaft of the DC motor. The pump has a pump inlet and a pump outlet that communicate with the vortex flow channel. Through the cooperation of the pump, DC motor and impeller, the volume of the circulating pump can be optimized and the efficiency of the circulating pump can be improved.

[0006] In one embodiment, a gas-liquid separation chamber is provided on the side of the pump, the vortex flow channel is connected to the gas-liquid separation chamber through the liquid outlet, the pump outlet is located on the side of the gas-liquid separation chamber opposite to the liquid outlet, and the cross-sectional area of ​​the gas-liquid separation chamber is larger than the cross-sectional area of ​​the liquid outlet.

[0007] In one embodiment, the pump outlet is located at the top of the pump.

[0008] In one embodiment, a suction chamber is provided on the side of the pump, the vortex flow channel is connected to the suction chamber through a liquid inlet, the cross-sectional area of ​​the suction chamber is larger than the cross-sectional area of ​​the liquid inlet, and the pump inlet is opened on one side of the suction chamber.

[0009] In one embodiment, the impeller includes a plurality of blades disposed at a radial edge, the plurality of blades being arranged circumferentially along the impeller.

[0010] In one embodiment, both the pump outlet and the pump inlet are located at the top of the pump.

[0011] In one embodiment, a partition tongue is provided between the pump inlet and the pump outlet, and the radial edge of the impeller is adjacent to the partition tongue.

[0012] In one embodiment, the pump includes a pump body and a pump cover. The pump body is fixedly connected to the DC motor. A stepped surface is formed at one end of the pump body near the pump cover. The impeller is disposed on the stepped surface. The pump body cover is disposed on the stepped surface to form the receiving cavity.

[0013] In one embodiment, a groove is formed on the side of the pump cover near the pump body, the groove and the stepped surface share the receiving cavity, and the shaft portion of the DC motor extends into the groove.

[0014] In one embodiment, a flexible fixing bracket is pressed onto the outside of the DC motor or the pump body. The flexible fixing bracket is used to fix the DC motor or the pump body to the surface to be installed. The inside of the flexible fixing bracket is a rigid component, and the outside is a flexible component that wraps around the rigid component. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0016] Figure 1 A schematic diagram of a circulating pump for cooling a laser welding machine provided in an embodiment of this application;

[0017] Figure 2 A schematic diagram of a circulating pump for cooling a laser welding machine provided in an embodiment of this application;

[0018] Figure 3 A schematic diagram of a circulating pump for cooling a laser welding machine provided in an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of the structure of a flexible fixed bracket for cooling a laser welding machine, provided in one embodiment of this application.

[0020] Reference numerals: 10 for circulating pump for cooling laser welding machine; 20 for pump motor; 21 for receiving cavity; 22 for pump inlet; 23 for pump outlet; 24 for partition tongue; 25 for pump body; 26 for pump cover; 30 for DC motor; 31 for rotating shaft; 40 for impeller; 41 for blade; 50 for vortex flow channel; 60 for gas-liquid separation chamber; 70 for suction chamber; 80 for flexible fixed support. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] Laser equipment can handle a variety of materials, enabling applications such as laser cutting, laser welding, laser marking, and laser engraving. Due to its high precision and ease of operation, laser equipment is increasingly widely used in various home and commercial settings. During prolonged operation, laser generators continuously generate high temperatures. Excessive operating temperature of the laser tube can cause irreversible damage, leading to reduced laser output power and affecting the quality of processing. Furthermore, prolonged operation at excessively high temperatures significantly shortens the lifespan of the laser tube. Because the laser tube is a core component and replacement is costly, a high-efficiency water-cooling circulation system is typically added to the laser generator to control the temperature and ensure sustained, reliable operation. The circulation pump uses the force exerted by the rotating impeller 40 on the liquid, transferring kinetic energy by applying impulse in the direction of liquid movement. The impeller 40 of the circulation pump is a uniformly thick disc with numerous radial blades 41 on both sides of its outer edge. A uniform cross-section annular flow channel is located on the pump casing corresponding to the blade 41. This channel is divided into suction and discharge sections by a tongue 24, which are connected to the pump's suction and discharge pipes, respectively. When the liquid inside the pump rotates with the impeller 40, it generates centrifugal force, propelling it outward into the annular flow channel within the pump casing. Constrained by the channel's shape, it is forced to flow back, re-entering the next blade passage from the root of blade 41. Therefore, the trajectory of the liquid between the blade 41 and the annular flow channel is a forward spiral for the stationary pump casing and a backward spiral for the rotating impeller 40. The liquid can continuously enter the space between the blades 41 to acquire energy until it is finally discharged from the outlet. In the heat exchanger, the internal circulating water exchanges energy with the external circulating water. The cooled water returns to the water tank and, passing through a filter and pump, carries away heat from the laser cavity, thus cooling the laser. Subsequently, the heated water flows back to the heat exchanger to exchange energy with the external circulating water again. Traditional water-cooled systems for welding machines use two types of circulating pumps: diaphragm pumps, typically powered by DC motors, and vortex pumps, typically powered by single-phase asynchronous motors. During operation, diaphragm pumps suffer from low head and short lifespan due to pressure limitations on the diaphragm, while vortex pumps, powered by single-phase asynchronous motors, are characterized by large size, high cost, low efficiency, high power consumption, and high noise levels.

[0026] refer to Figure 1 , Figure 2 and Figure 3To address the aforementioned issues, this application provides a circulating pump 10 for cooling a laser welding machine, comprising a pump 20, a DC motor 30, and an impeller 40. The pump 20 is connected to the DC motor 30. The pump 20 has a receiving cavity 21, and the impeller 40 is located within the receiving cavity 21. An annular vortex flow channel 50 is formed between the radial edge of the impeller 40 and the cavity wall of the receiving cavity 21. The impeller 40 is fixed to the rotating shaft 31 of the DC motor 30. The pump 20 has a pump inlet 22 and a pump outlet 23 that communicate with the vortex flow channel 50.

[0027] The circulating pump 10 for cooling a laser welding machine includes a pump 20, a DC motor 30, and an impeller 40. The pump 20 is connected to the DC motor 30, which powers the pump 20. The pump 20 can be a centrifugal water pump. The pump 20 plays a crucial role in the cooling circulation system. In some embodiments, the circulating pump is powered by the DC motor 30. Compared to the existing unidirectional asynchronous motor, the DC motor 30 has higher circulation efficiency. Furthermore, with the same output power, the DC motor 30 circulating pump requires less input power than the unidirectional asynchronous motor circulating pump. For example, with a 160W input power, the volume of the unidirectional asynchronous motor in the circulating pump module is approximately φ120×140 (mm); if the DC motor 30 is used, with the same input power, the volume of the DC motor 30 in the circulating pump module is approximately φ80×80 (mm), a 64% reduction compared to the traditional unidirectional asynchronous motor. This demonstrates that using the DC motor 30 instead of the traditional unidirectional asynchronous motor effectively reduces the amount of material needed for parts production and optimizes costs. In some embodiments, the pump body 25 can also be intelligently controlled, specifically through rapid response program control via a PCBA control board (printed circuit board), achieving more precise temperature control and preventing overheating of critical components. Simultaneously, the circulating pump 10 used to cool the laser welding machine provides a stable water flow, ensuring a constant and reliable flow rate, maintaining the constant laser wavelength, and thus extending the lifespan of the laser welding machine and achieving its optimal performance. In some embodiments, the pump 20 has a receiving cavity 21, within which the impeller 40 is located. The impeller 40 accelerates the fluid radially outward from the center of rotation, transferring energy from the motor driving the pump to the pumped liquid. When the outward movement of the liquid is restricted by the pump casing, the velocity reached by the impeller 40 is converted into pressure. In some embodiments, the impeller 40 is eccentrically mounted in the pump 20. When the impeller 40 rotates, water is thrown outward by the impeller 40, and due to centrifugal force, the water forms a closed water ring of equal thickness, similar in shape to the pump 20. The upper inner surface of the water ring is tangent to the hub of the impeller 40, and the lower inner surface of the water ring is in contact with the tip of the blade 41. At this time, a crescent-shaped space is formed between the impeller 40 hub and the water ring, and this space is further divided by the impeller 40 into several small chambers equal in number to the blades 41. If we take the upper 0° of the impeller 40 as the starting point, then during the first 180° of the impeller 40's rotation, the volume of the small chambers gradually increases, the pressure continuously decreases, and they are connected to the intake port on the intake and exhaust plate. When the pressure in the small chamber is lower than the pressure in the container being pumped, according to the principle of gas pressure balance, the gas being pumped is continuously drawn into the small chamber, which is the intake process. When the intake is complete, it is isolated from the intake port, the volume of the small chamber gradually decreases, and the pressure continuously increases, which is the compression process. When the compressed gas reaches the exhaust pressure ahead of schedule, it is exhausted from the auxiliary exhaust valve in advance.When the gas pressure is greater than the exhaust pressure, the compressed gas is discharged from the exhaust port. During the continuous operation of the pump, the processes of intake, compression, and exhaust are continuously performed, thereby achieving the purpose of continuous pumping. The impeller 40 can rotate at high speed, and the high-speed rotating impeller 40 can gain energy. An annular vortex flow channel 50 is formed between the radial edge of the impeller 40 and the cavity wall of the receiving cavity 21. The liquid gains energy once each time it passes through the impeller 40 in the flow channel by relying on the longitudinal vortex. In some embodiments, the impeller 40 is divided into a vortex impeller 40 or a groove impeller 40. In some embodiments, the impeller 40 is fixed to the shaft 31 of the DC motor 30. The pump 20 has a pump inlet 22 and a pump outlet 23 that communicate with the vortex flow channel 50. Through the coordinated action of the pump 20, the DC motor 30, and the impeller 40, the volume of the circulating pump can be optimized and the efficiency of the circulating pump can be improved.

[0028] See Figure 1 , Figure 2 and Figure 3 A gas-liquid separation chamber 60 is provided on the side of the pump 20. The vortex flow channel 50 is connected to the gas-liquid separation chamber 60 through the liquid outlet. The pump outlet 23 is located on the side of the gas-liquid separation chamber 60 opposite to the liquid outlet. The cross-sectional area of ​​the gas-liquid separation chamber 60 is larger than the cross-sectional area of ​​the liquid outlet. In some embodiments, the pump 20 can be configured as a self-priming pump 20. Due to its special structure, the self-priming circulating pump 20 only needs to be filled with liquid once before the first start after installation. After the circulating pump stops running, a certain amount of liquid will remain in the pump 20. When the pump 20 is restarted, due to the rotation of the impeller 40, the air and liquid in the suction pipe are fully mixed and discharged into the gas-liquid separation chamber 60. The gas in the upper part of the gas-liquid separation chamber 60 overflows, and the liquid in the lower part returns to the impeller 40 to mix with the remaining air in the suction pipe again until all the gas in the pump and suction pipe is discharged, completing the self-priming and normal liquid delivery. In some embodiments, the pump outlet 23 is located at the top of the pump 20, and a suction chamber 70 is provided on the side of the pump 20. The vortex flow channel 50 communicates with the suction chamber 70 through the liquid inlet. The cross-sectional area of ​​the suction chamber 70 is larger than that of the liquid inlet. The pump inlet 22 is opened on one side of the suction chamber 70. The circulating pump has excellent sealing and leak-proof performance. The pump chamber can completely isolate the liquid and the motor, ensuring sealing and reliability. In some embodiments, the impeller 40 includes a plurality of blades 41 disposed on the radial edge, and the plurality of blades 41 are arranged circumferentially along the impeller 40. In one embodiment, the impeller 40 may be configured with 5 radial edge blades 41, and in another embodiment, the impeller 40 may also be configured with 6 radial edge blades 41. The size and shape of the blades 41 may be configured to be the same or symmetrical structure, so as to better generate energy during the rotation of the impeller 40. The circumferential arrangement of the plurality of blades 41 along the impeller 40 is conducive to the consistency of the rotation trajectory of the blades 41.

[0029] See Figure 1 , Figure 2 and Figure 3Both the pump outlet 23 and the pump inlet 22 are located at the top of the pump 20. The pump inlet 22 serves as the outlet of the pump 20, allowing liquid to flow in through the pump inlet 22 and out through the pump outlet 23. A partition tongue 24 is provided between the pump inlet 22 and the pump outlet 23. The radial edge of the impeller 40 is adjacent to the partition tongue 24. The partition tongue 24 is a fluid dynamic element installed between the various stages of the impeller 40 in the pump 20. When the liquid is acted upon by the first-stage impeller 40, the partition tongue 24 separates the pressure between the impellers 40, ensuring a more even distribution of power and pressure when acting on the second-stage impeller 40, thereby improving the overall pump efficiency. Furthermore, the partition tongue 24 prevents liquid agitation, improving pump stability. Specifically, the partition tongue 24 separates the pressure of each stage of the impeller 40, ensuring a more even distribution of power and pressure when acting on the next stage impeller 40. This reduces the operating pressure of each stage of the impeller 40, decreases pump energy consumption, and improves pump efficiency. Meanwhile, the tongue 24 prevents fluid from churning within the impeller 40, thereby reducing the disturbance force and turbidity eddies caused by the fluid inside the pump to the impeller 40, ensuring stable pump flow and head, and improving pump operation stability. The tongue 24 also reduces fluid vibration and noise within the pump, lowering operating noise and vibration, making the entire pump more stable and quiet during operation. In some embodiments, the pump 20 includes a pump body 25 and a pump cover 26. The pump body 25 is fixedly connected to the DC motor 30. A stepped surface is formed at one end of the pump body 25 near the pump cover 26. The pump body 25 is the main outer casing of the pump, typically made of cast iron, steel plate, or steel castings, used to house and support other components. The pump body 25, also called the pump casing, is the main body of the pump, providing support and fixation, and is connected to the bearing mounting bracket. It consists of three main parts: the liquid suction section, the impeller 40 operating space, and the liquid discharge section. The main function of the pump body 25 is to support and fix other pump components, while connecting to the bearing mounting bracket to ensure normal operation and structural stability of the pump. In addition, the pump body 25 is typically provided with an inlet and an outlet for the inflow and outflow of liquid, thereby completing the pump's conveying task. The impeller 40 is located on a stepped surface, and the pump body 25 is covered on the stepped surface to form a receiving cavity 21. A groove is formed on the side of the pump cover 26 near the pump body 25, and the groove and the stepped surface share the receiving cavity 21. The shaft 31 of the DC motor 30 extends into the groove. The pump cover 26 is a cover installed on the pump body 25 and forms part of the housing. The main functions of the pump cover 26 include sealing, support, and inlet / outlet ports. After installation, the pump cover 26 can prevent fluid leakage. The support function means that the pump cover 26 can support other components of the pump, providing support and fixation. The inlet / outlet ports refer to the inlets and outlets on the pump cover 26, which can introduce fluid into the pump or discharge it from the pump 20. In some embodiments, the pump cover 26 can be made of metal or plastic, and its shape is not fixed, such as square, round, or rectangular, and it is positioned by threads, bolts, or wire clamps.

[0030] See Figure 4 In some embodiments, a flexible fixing bracket 80 is pressed onto the outer side of the DC motor 30 or the pump body 25. The flexible fixing bracket 80 is used to fix the DC motor 30 or the pump body 25 to the mounting surface, and has the functions of fixing, supporting and positioning, thereby optimizing the structure of the circulating pump 10 used for cooling the laser welding machine and improving the efficiency of the circulating pump. Specifically, the interior of the flexible fixing bracket 80 is a rigid component, and the exterior is a flexible component that wraps around the rigid component. Compared with the traditional water cooling system of the electric welding machine that uses a single-phase asynchronous motor circulating pump with integrated fan blades, the large diameter and large inertia of the fan blades cause vibration in addition to wind noise during operation, which is transmitted to other parts of the machine through the fixing bolts, thus causing noise. In the circulating pump 10 for cooling the laser welding machine provided in this solution, the use of the flexible fixing bracket 80 can reduce and avoid noise caused by vibration during pump operation. In one embodiment, the flexible fixing bracket 80 is made of a metal skeleton wrapped with rubber material. Specifically, the metal skeleton inside the flexible fixing bracket 80 can ensure the strength of the mounting bracket, while the outer rubber can effectively absorb vibrations during operation and effectively reduce noise. In addition, due to the good toughness of the rubber material, the axial position of the fixing bracket can be adjusted by using a certain force, thereby improving the installation flexibility of the circulating pump 10 used to cool the laser welding machine.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A circulating pump for cooling a laser welding machine, characterized in that, The device includes a pump, a DC motor, and an impeller. The pump is connected to the DC motor. The pump has a accommodating cavity, and the impeller is located inside the accommodating cavity. The radial edge of the impeller forms an annular vortex flow channel between itself and the cavity wall of the accommodating cavity. The impeller is fixed to the rotating shaft of the DC motor. The pump has a pump inlet and a pump outlet that communicate with the vortex flow channel.

2. The circulating pump for cooling a laser welding machine according to claim 1, characterized in that, A gas-liquid separation chamber is provided on the side of the pump. The vortex flow channel is connected to the gas-liquid separation chamber through the liquid outlet. The pump outlet is located on the side of the gas-liquid separation chamber opposite to the liquid outlet. The cross-sectional area of ​​the gas-liquid separation chamber is larger than the cross-sectional area of ​​the liquid outlet.

3. The circulating pump for cooling a laser welding machine according to claim 2, characterized in that, The pump outlet is located at the top of the pump.

4. The circulating pump for cooling a laser welding machine according to claim 1, characterized in that, The pump has a suction chamber on its side, and the vortex flow channel is connected to the suction chamber through the liquid inlet. The cross-sectional area of ​​the suction chamber is larger than that of the liquid inlet, and the pump inlet is located on one side of the suction chamber.

5. The circulating pump for cooling a laser welding machine according to claim 1, characterized in that, The impeller includes a plurality of blades disposed on the radial edge, the plurality of blades being arranged circumferentially along the impeller.

6. The circulating pump for cooling a laser welding machine according to claim 1, characterized in that, Both the pump outlet and the pump inlet are located at the top of the pump.

7. The circulating pump for cooling a laser welding machine according to claim 6, characterized in that, A partition tongue is provided between the pump inlet and the pump outlet, and the radial edge of the impeller is adjacent to the partition tongue.

8. The circulating pump for cooling a laser welding machine according to claim 1, characterized in that, The pump includes a pump body and a pump cover. The pump body is fixedly connected to the DC motor. A stepped surface is formed at one end of the pump body near the pump cover. The impeller is disposed on the stepped surface. The pump body cover is disposed on the stepped surface to form the accommodating cavity.

9. The circulating pump for cooling a laser welding machine according to claim 8, characterized in that, A groove is formed on the side of the pump cover near the pump body, and the groove and the stepped surface share the receiving cavity. The shaft portion of the DC motor extends into the groove.

10. The circulating pump for cooling a laser welding machine according to claim 8, characterized in that, A flexible fixing bracket is pressed onto the outside of the DC motor or the pump body. The flexible fixing bracket is used to fix the DC motor or the pump body to the surface to be installed. The inside of the flexible fixing bracket is a rigid component, and the outside is a flexible component that wraps around the rigid component.

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