Steel ball suction device

Abstract

The utility model discloses a steel ball aspirator, including handle and exhaust pipe, be equipped with first pipeline intercommunication exhaust pipe and positive pressure gas source in handle, and one end of exhaust pipe both ends opening is connected with the gun head, and the inside of gun head is equipped with second pipeline intercommunication exhaust pipe, and the end face of gun head away from exhaust pipe is equipped with a plurality of with second pipeline intercommunication for adsorbing pinhole, the flow resistance of one end opening of exhaust pipe and gun head connection is greater than the flow resistance of another end opening, the diameter of second pipeline is greater than the maximum inner diameter of exhaust pipe, and the minimum inner diameter of exhaust pipe is greater than the pinhole inner diameter, and the both ends of second pipeline gradually reduce to the middle inner diameter, and the pinhole communicates with the minimum place of second pipeline inner diameter. The utility model can utilize positive pressure gas source to realize batch steel ball fast and accurate positioning and catch, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to bearing assembly auxiliary tools, and in particular to a steel ball suction device. Background Technology

[0002] A common structure for motorcycle steering mechanisms (bearings) involves the engagement of steel balls and steel bearings (steering rings). During assembly, a specific number of steel balls are manually inserted one by one into pre-set raceways within the steering ring, and grease is applied to the balls for lubrication and initial securing.

[0003] This traditional manual assembly method has the following significant drawbacks: Low assembly efficiency: Operators need to pick up and place a large number of small steel balls one by one, which takes a long time and becomes a bottleneck process on the production line.

[0004] Prone to errors: Manual placement can easily result in missing or extra steel balls, affecting product quality and bearing operational stability.

[0005] Positional accuracy is difficult to guarantee: the uniformity of the steel balls distributed in the ball track depends entirely on the operator's skill level, resulting in poor consistency.

[0006] Tool limitations: While tools that utilize negative pressure to pick up small parts exist, positive pressure air sources are more common and readily available in many industrial settings. Specialized tools utilizing positive pressure air sources for batch picking and precise positioning of steel balls are currently lacking. Summary of the Invention

[0007] Purpose of the utility model: The purpose of this utility model is to provide a steel ball suction device that uses a positive pressure air source to quickly and accurately position and grab a large number of steel balls.

[0008] Technical solution: The steel ball suction device of this utility model includes a handle and an exhaust pipe. The handle has a first pipe that connects the exhaust pipe and a positive pressure air source. The exhaust pipe has openings at both ends, one of which is connected to a gun head. The gun head has a second pipe that connects to the exhaust pipe. The end face of the gun head away from the exhaust pipe has multiple fine holes that connect to the second pipe for adsorbing steel balls. The flow resistance at the opening of the exhaust pipe connected to the gun head is greater than the flow resistance at the opening of the other end.

[0009] Through structural design, the flow resistance at one end of the exhaust pipe connected to the nozzle (end B) is intentionally made greater than that at the other end (end A). When positive pressure gas is introduced, according to the principle of "competitive pressure relief," most of the gas will preferentially be discharged at high speed from end A, which has lower flow resistance. This generates a high-speed jet at end A and also causes the airflow towards the nozzle to be "captured," thus significantly reducing the pressure in the second pipe inside the nozzle and forming a stable negative pressure zone, allowing the fine pores to adsorb steel balls. This design converts the commonly available positive pressure gas source into the negative pressure suction required at the nozzle end face, eliminating the need for an additional negative pressure device. It solves the key technical problem of achieving adsorption function under positive pressure environment. This device has a simple structure and low cost.

[0010] Preferably, the diameter of the second pipe is larger than the maximum inner diameter of the exhaust pipe, and the minimum inner diameter of the exhaust pipe is larger than the inner diameter of the fine hole.

[0011] The fact that the diameter of the second pipe is larger than the maximum inner diameter of the exhaust pipe allows the airflow to diffuse and slow down as it enters the nozzle from the exhaust pipe, while avoiding additional throttling resistance at the interface, ensuring that low pressure is effectively transmitted throughout the entire cavity. The entire second pipe acts as a buffer chamber, allowing sufficient space for the small amount of positive pressure gas entering from the exhaust pipe to mix thoroughly with the external air entering from the orifice before being drawn into the exhaust pipe and discharged from the other end, thus maintaining the dynamic balance of the entire cycle. The fact that the minimum inner diameter of the exhaust pipe is larger than the inner diameter of the orifice ensures that the orifice is the point of greatest flow resistance in the entire path from the gas source to the adsorption point (orifice). This fundamentally strengthens the condition of "competitive pressure relief," meaning that the total flow resistance at end B of the exhaust pipe is greater than the flow resistance at end A, which is the fundamental guarantee for generating significant negative pressure suction. The combination of these two factors optimizes the pressure distribution and flow field within the system, making the suction stronger and more stable.

[0012] Preferably, the inner diameter of the second pipe gradually decreases from both ends toward the middle, and the fine hole is connected to the point where the inner diameter of the second pipe is the smallest.

[0013] The second pipe is designed as a Venturi tube-like structure with large ends and a small middle. When the gas flowing into this cavity due to the suction effect of end A flows through the "throat" in the middle, according to Bernoulli's principle, the flow velocity will increase and the static pressure will drop to the minimum. The fine holes for adsorbing steel balls are opened at the "throat" position with the smallest inner diameter and the lowest static pressure, which can amplify the negative pressure effect and improve the adsorption force of the fine holes on the steel balls.

[0014] Preferably, the opening of the exhaust pipe at the end away from the nozzle is provided with a regulating valve for adjusting the flow resistance.

[0015] By providing the regulating valve, the flow resistance at end A can be changed more conveniently. According to the competitive pressure relief model, adjusting the flow resistance at end A directly regulates the competitive relationship of pressure relief capability between end A and end B (the gun tip end), and further adjusts the magnitude of the negative pressure at end B, which in turn can adjust the suction force of the fine pores on the steel ball. This enables the same tool to flexibly adapt to the suction requirements of steel balls of different sizes or weights, or compensate for fluctuations in air source pressure, achieving adjustable suction force and wide adaptability to working conditions, and greatly improving the practical value of the tool.

[0016] As a preference, the inner diameter of the opening at the end of the exhaust pipe connected to the gun tip is smaller than the inner diameter of the opening at the other end.

[0017] By making the inner diameter of the opening (end B) at the end of the exhaust pipe connected to the gun tip physically smaller than the inner diameter of the opening (end A) at the other end, the condition that the flow resistance at end B is greater than the flow resistance at end A can be directly established from the source. This design simplifies the system's dependence on competitive pressure relief conditions, and can more stably and reliably ensure the generation of negative pressure even when it is inconvenient to install a regulating valve or the internal structure of the gun tip has slight changes.

[0018] As a preference, the total cross-sectional area of all fine pores is smaller than the cross-sectional area of the opening of the exhaust pipe at the end away from the gun tip.

[0019] The total cross-sectional area of all fine pores is the only passage area for external air to enter the gun tip, while the cross-sectional area of port A is the main passage area for gas discharge. Defining "the total cross-sectional area of fine pores < the cross-sectional area of port A" ensures that the resistance of gas flowing into the system is greater than the resistance of gas flowing out of the system, ensures that negative pressure can be generated at the gun tip, and avoids the problem of insufficient suction force or failure caused by the excessive total area of the fine pores.

[0020] As a preference, the handle is located closer to the port where the exhaust pipe is connected to the gun tip.

[0021] As a preference, the handle is provided with a self-resetting switch for controlling the communication of the first pipeline.

[0022] Using the self-resetting switch to control the communication state of the first pipeline can control whether positive pressure gas enters the exhaust pipe, and further control whether negative pressure is generated at the gun tip, which can realize the operation of "suction on pressing, stop on releasing" and improve the convenience of operation.

[0023] As a preference, the gun tip is in threaded connection with the exhaust pipe.

[0024] The threaded connection has the advantages of reliable connection, good sealing performance and convenient disassembly and assembly, ensuring that the entire device can work stably and is easy to disassemble and assemble.

[0025] As a preference, the arrangement of the plurality of fine pores matches the shape of the steel ball groove to be placed on the steel tile.

[0026] This setup ensures that once the steel ball is attracted, its spatial position coincides with the predetermined installation position on the workpiece, avoiding the secondary adjustment required by traditional manual or general-purpose suction tools and improving work efficiency.

[0027] Beneficial effects: By connecting the nozzle to one end of the exhaust pipe and ensuring that the flow resistance at the end connected to the nozzle is greater than that at the other end, the gas from the positive pressure source will preferentially exit from the end not connected to the nozzle, thereby generating negative pressure at the nozzle end. This allows the positive pressure device to be used to draw in steel balls, making it easier to obtain a positive pressure device and reducing costs. Furthermore, the arrangement of the fine holes on the nozzle matches the groove for the steel balls to be placed on the steel tile, allowing all steel balls to be drawn in a single operation, enabling complete installation in one go and greatly improving construction efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a cross-sectional view of the present invention. Detailed Implementation

[0029] As shown in the figure, the steel ball suction device of this utility model includes a handle 1 and an exhaust pipe 2. The handle 1 has a first pipe that connects the exhaust pipe 2 and a positive pressure air source. The exhaust pipe 2 has openings at both ends, and one end is connected to a nozzle 3. The nozzle 3 has a second pipe 4 that connects to the exhaust pipe 2. The end face of the nozzle 3 away from the exhaust pipe 2 has multiple fine holes 5 that connect to the second pipe 4 for adsorption. The flow resistance at one end of the exhaust pipe 2 connected to the nozzle 3 is greater than the flow resistance at the other end.

[0030] The handle 1 can be designed in a shape that is easy to grip and tilted backward (with the nozzle 3 facing forward). The specific configuration can be chosen according to actual needs. The handle 1 has an axially penetrating first pipe, one end of which is connected to a positive pressure air source, and the other end to an exhaust pipe 2. A self-resetting switch 6 can also be installed on the handle 1 to control the connection status of the first pipe. The self-resetting switch 6 can be a conventional spring switch, with a through hole matching the first pipe. When the self-resetting switch 6 is not pressed, it blocks the first pipe, preventing its connection. Pressing the switch places its internal through hole into the first pipe, allowing the first pipe to connect. Thus, the connection of the first pipe can be flexibly controlled through the self-resetting switch 6. The handle 1 can be positioned near the nozzle 3.

[0031] The exhaust pipe 2 can be a cylindrical pipe or other shapes. The exhaust pipe 2 is open at both ends, with one end connected to a nozzle 3 and the other open for exhaust. For ease of description, the open end will be referred to as end A, and the end connected to the nozzle 3 as end B. This device primarily uses "competitive pressure relief" to generate negative pressure at end B from a positive pressure source. This means the flow resistance at end B must be greater than that at end A, causing gas to be more likely to exit from end A, thus generating negative pressure at end B. While connecting the nozzle 3 to end B would normally increase the flow resistance at that end, to further ensure "competitive pressure relief," the inner diameter of end A can be set larger than that of end B to further reduce the flow resistance at end A. Alternatively, a flow resistance regulating valve can be installed at the opening of end A to flexibly adjust the flow resistance at end A, thereby controlling the flow rate of gas exiting from end A, and consequently controlling the flow rate of gas flowing to end B, and thus controlling the magnitude of the negative pressure generated at end B. Besides these methods, the roughness of the inner wall of the exhaust pipe 2 can also be adjusted to change the flow resistance at both ends.

[0032] The nozzle 3 can be cylindrical, with a chamfer at the end near the exhaust pipe 2. Inside the nozzle 3 is a cylindrical second pipe 4, connecting the exhaust pipe 2 to multiple fine holes 5 located on the end face of the nozzle 3 away from the exhaust pipe 2. The diameter of the second pipe 4 is larger than the maximum inner diameter of the exhaust pipe 2, meaning it is necessarily larger than the inner diameter of the exhaust pipe 2 at end B. This slows down the gas entering the second pipe 4 from the exhaust pipe 2, allowing for smooth mixing with the external air drawn in through the fine holes 5, thus maintaining a stable dynamic equilibrium within the second pipe 4. Simultaneously, the inner diameter of the fine holes 5 is much smaller than the minimum inner diameter of the exhaust pipe 2, effectively increasing the flow resistance at end B, making it easier for the gas to flow towards the less resistant end A, thereby generating negative pressure at end B. The total cross-sectional area of ​​all the fine holes 5 is smaller than the cross-sectional area of ​​the opening at end A, further ensuring that the flow resistance at end B is greater than that at end A.

[0033] In addition to being cylindrical, the second pipe 4 can also be designed as two sections with a larger diameter that gradually decreases towards the middle. The position with the smallest diameter is closer to the outer end face of the nozzle 3 (the end face where the fine hole 5 is set). In this way, the second pipe 4 is equivalent to a Venturi tube, and its smallest diameter is equivalent to the throat. The fine hole 5 is connected to the smallest diameter of the second pipe 4, which is to say, it is connected to the throat. Based on the Venturi effect, a greater negative pressure can be generated at the throat, increasing the suction force of the fine hole 5.

[0034] The gun head 3 and the exhaust pipe 2 can be connected by threads. The arrangement of the fine holes 5 at the outer end of the gun head 3 matches the shape of the groove where the steel ball is to be placed in the steel tile. Different gun heads 3 can be set to match different specifications of steel tiles. In this way, the gun head 3 can pick up the steel ball through the fine holes 5 and put it directly into the corresponding groove of the steel tile without having to place them one by one, which greatly improves work efficiency.

Claims

1. A steel ball suction device, characterized in that: Includes a handle (1) and an exhaust pipe (2). The handle (1) has a first pipe that connects the exhaust pipe (2) and a positive pressure air source. The exhaust pipe (2) has openings at both ends, and one of the ports is connected to a nozzle (3). The nozzle (3) has a second pipe (4) that connects to the exhaust pipe (2). The end face of the nozzle (3) away from the exhaust pipe (2) has multiple fine holes (5) that connect to the second pipe (4) for adsorption. The flow resistance at one end of the exhaust pipe (2) and the nozzle (3) is greater than the flow resistance at the other end.

2. The steel ball suction device according to claim 1, characterized in that: The diameter of the second pipe (4) is greater than the maximum inner diameter of the exhaust pipe (2), and the minimum inner diameter of the exhaust pipe (2) is greater than the inner diameter of the fine hole (5).

3. The steel ball suction device according to claim 1, characterized in that: The inner diameter of the second pipe (4) gradually decreases from both ends toward the middle, and the fine hole (5) is connected to the point where the inner diameter of the second pipe (4) is the smallest.

4. The steel ball suction device according to claim 1, characterized in that: The opening at the end of the exhaust pipe (2) away from the nozzle (3) is provided with a regulating valve for adjusting the flow resistance.

5. The steel ball suction device according to claim 1, characterized in that: The inner diameter of the opening at one end of the exhaust pipe (2) connected to the nozzle (3) is smaller than the inner diameter of the opening at the other end.

6. The steel ball suction device according to claim 1, characterized in that: The total cross-sectional area of ​​all the fine holes (5) is less than the cross-sectional area of ​​the exhaust pipe (2) at the end away from the nozzle (3).

7. The steel ball suction device according to claim 1, characterized in that: The handle (1) is closer to the port where the exhaust pipe (2) connects to the nozzle (3).

8. The steel ball suction device according to claim 1, characterized in that: The handle (1) is provided with a self-resetting switch (6) for controlling the connection of the first pipeline.

9. The steel ball suction device according to claim 1, characterized in that: The gun head (3) is threadedly connected to the exhaust pipe (2).

10. The steel ball suction device according to claim 1, characterized in that: The arrangement of the multiple fine holes (5) matches the shape of the groove where the steel ball is to be placed on the steel tile.

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