Suction-type lock attaching unit

Abstract

The utility model relates to screw installation technical field, concretely is a kind of adsorption type lock unit, including base and install the intelligent electric screwdriver on base, still include negative pressure unit, drive unit and buffer unit, the negative pressure unit is installed on base, and screw is adsorbed on the bit head of intelligent electric screwdriver by generating negative pressure;The drive unit is installed on base, for pushing intelligent electric screwdriver to move up and down, and the screw on bit head is sent to the installation site to be waited for;The buffer unit is installed on base, for absorbing the kinetic energy when intelligent electric screwdriver moves down. By setting drive unit consisting of air cylinder, push rod and first spring, and independent buffer unit consisting of guide rod, second spring and press block, double buffering mechanism is formed. The design can effectively absorb the kinetic energy when electric screwdriver is pressed down, so that it contacts workpiece in a flexible way, greatly reduces the risk of screw falling or workpiece damage caused by rigid impact.

Description

Technical Field

[0001] This utility model relates to the field of screw installation technology, and in particular to an adsorption-type locking unit. Background Technology

[0002] In the field of automated assembly, screw fastening is a crucial process. Traditional automatic screw fastening machines typically use either air-blowing or suction-type feeding. Air-blowing machines use airflow to deliver screws to the screwdriver bit, offering high speed, but they are prone to jamming and screw flipping problems with small or irregularly shaped screws. Suction-type machines, on the other hand, use negative pressure to directly attach the screw to the electric screwdriver bit before transporting it to the fastening position. This method is more adaptable to a wider range of screws and offers higher reliability.

[0003] However, existing suction-type locking units still present some technical challenges. First, during the process of moving the screw with the electric screwdriver to the workpiece surface, if the downward pressure is too fast or there is a hard collision with the workpiece, the screw can easily fall off the bit or scratch the workpiece surface. Second, controlling the negative pressure suction force is crucial: if the suction force is too weak, the screw is likely to fall off during movement; if the suction force is too strong, not only is energy wasted, but the screw may also be too tightly held onto the bit, affecting subsequent tightening operations. Furthermore, ensuring good alignment and sealing between the bit and the suction tube throughout the electric screwdriver's up-and-down stroke to prevent accidental screw detachment during transfer is also a problem requiring careful design.

[0004] Therefore, the core technical problem that urgently needs to be solved in this field is: how to design an adsorption-type locking unit that can achieve flexible and buffered downward pressure of the electric screwdriver to prevent collision and screw fall-off, while accurately controlling and displaying the adsorption force to ensure the reliability and stability of the screw transfer process. Utility Model Content

[0005] The main objective of this invention is to provide an adsorption-type locking unit to solve the problems raised in related technologies.

[0006] To achieve the above objectives, according to one aspect of the present invention, an adsorption-type locking unit is provided, comprising a base and a smart electric screwdriver mounted on the base, and further comprising:

[0007] A negative pressure unit, which is mounted on the base, generates negative pressure to attract screws to the bit of the smart electric screwdriver;

[0008] A drive unit, mounted on a base, is used to move the intelligent electric screwdriver up and down to deliver the screw on the screwdriver head to the part to be installed.

[0009] A buffer unit, mounted on the base, is used to absorb the kinetic energy of the intelligent electric screwdriver as it moves downwards.

[0010] Furthermore, a guide rail is fixedly provided vertically in the center of the front of the base, a slider is slidably provided on the guide rail, and an electric screwdriver mounting base is fixedly provided on the slider. The electric screwdriver mounting base is used to install a smart electric screwdriver.

[0011] Furthermore, the negative pressure unit includes a straw, an air tube, and a pressure gauge. The straw is fixedly installed on the bottom front of the base via a straw mounting bracket, and the pressure gauge is installed on the top front of the base. The pressure gauge and the straw are connected via the air tube.

[0012] Furthermore, the drive unit includes a cylinder fixedly mounted on the base, a push rod fixedly connected to the piston rod of the cylinder, a lower retaining ring fixedly sleeved below the outer ring of the push rod, an upper retaining ring slidably sleeved above the push rod, and a first spring provided between the upper retaining ring and the lower retaining ring.

[0013] Furthermore, the buffer unit includes a guide rod fixedly disposed on the upper surface of the straw mounting base, a second spring being sleeved on the outer ring of the guide rod, and a pressure block being fixedly disposed on the top of the second spring.

[0014] Furthermore, the pressure block is slidably sleeved on the guide rod.

[0015] Furthermore, a limiting plate is fixedly provided at the position of the electric screwdriver mounting base opposite the pressure block, and a limiting hole for accommodating the guide rod is opened at the position of the limiting plate opposite the guide rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Achieves flexible buffering and precise alignment during the screw-on process: By setting up a drive unit consisting of a cylinder, push rod, and first spring, and an independent buffer unit consisting of a guide rod, second spring, and pressure block, a dual buffering mechanism is formed. This design effectively absorbs the kinetic energy when the electric screwdriver is pressed down, allowing it to contact the workpiece in a flexible manner, greatly reducing the risk of screw loosening or workpiece damage due to rigid collisions. At the same time, the cooperation between the guide rod and the upper limit hole of the limit plate ensures precise alignment when the electric screwdriver mounting base is pressed down, further improving operational stability.

[0018] 2. Provides visualized and precise negative pressure control: By setting a negative pressure unit including a pressure gauge, the operator can monitor the negative pressure value of the screw in real time. This allows the output negative pressure of the air compressor to be precisely adjusted to a critical value that is just enough to reliably attract the screw without being too high. This ensures that the screw will not fall off due to insufficient suction during delivery, while also avoiding energy waste and potential over-tightening of the screw and screw bit, achieving a balance between high efficiency and energy saving.

[0019] 3. Ensures the continuity and reliability of the screw delivery path: By rationally designing the vertical stroke of the electric screwdriver, the lower end of the bit remains inside the suction tube even when it reaches its highest position. This design provides a continuous closed or semi-closed environment for the bit and screw after they are attracted, effectively preventing the screw from accidentally falling off the top of the suction tube due to external interference during the vertical transfer phase, thus improving the continuity and reliability of the entire fastening action. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the entire utility model. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the entire utility model. Figure 2 .

[0022] Figure label:

[0023] 1. Base; 2. Guide rail; 3. Slider; 4. Intelligent electric screwdriver; 5. Screwdriver bit; 6. Electric screwdriver mounting base; 7. Suction tube mounting base; 8. Suction tube; 9. Air tube; 10. Pressure gauge; 11. Lower retaining ring; 12. Upper retaining ring; 13. First spring; 14. Push rod; 15. Cylinder; 16. Guide rod; 17. Pressure block; 18. Second spring; 19. Limiting plate; 20. Limiting hole. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0025] This embodiment provides an adsorption-type fastening unit, mainly used for the automatic picking up and tightening of screws on automated production lines, such as... Figure 1 As shown, the unit mainly includes a base 1, and an intelligent electric screwdriver 4, a negative pressure unit, a drive unit, and a buffer unit installed on the base 1.

[0026] The base 1 serves as the supporting structure for the entire unit. A guide rail 2 is fixedly mounted vertically at the center of its front side. A slider 3 slides along the guide rail 2, allowing for smooth up-and-down movement. An electric screwdriver mounting base 6 is fixedly mounted on the slider 3, used to clamp and secure the intelligent electric screwdriver 4. Therefore, the intelligent electric screwdriver 4 can move precisely up and down linearly relative to the base 1 along with the slider 3 and the mounting base 6.

[0027] The negative pressure unit is responsible for generating suction force to pick up screws. This unit includes a suction tube 8, an air tube 9, and a pressure gauge 10. The suction tube 8 is fixedly mounted on the bottom front of the base 1 via a suction tube mounting base 7, with its opening facing upwards, directly opposite the bit 5 of the intelligent electric screwdriver 4. The pressure gauge 10 is mounted on the top front of the base 1 and is connected to the suction tube 8 via the air tube 9. The air inlet of the pressure gauge 10 is connected to an external air compressor (not shown in the figure). When the air compressor starts, a negative pressure (vacuum) is generated at the port of the suction tube 8, thereby attracting the screws below the suction tube 8. The function of the pressure gauge 10 is to display the current negative pressure value in real time, allowing the operator to accurately adjust the negative pressure generated by the air compressor to a suitable value that reliably attracts screws without wasting energy.

[0028] The drive unit provides power for the up-and-down movement of the intelligent electric screwdriver 4. This unit mainly includes a cylinder 15 fixedly mounted on the base 1. A push rod 14 is fixedly connected to the end of the piston rod of the cylinder 15. A lower retaining ring 11 is fixedly fitted below the outer ring of the push rod 14, and an upper retaining ring 12 is slidably fitted above it. The upper retaining ring 12 is fixedly connected to the base 1, while the lower retaining ring 11 is fixedly connected to the electric screwdriver mounting base 6. A first spring 13 is fitted between the upper retaining ring 12 and the lower retaining ring 11. The push rod 14 passes through the center of the first spring 13, and the two ends of the first spring 13 are respectively fixedly pressed against the upper retaining ring 12 and the lower retaining ring 11.

[0029] When the piston rod of cylinder 15 extends, it pushes push rod 14 downward. Push rod 14, through lower retaining ring 11, drives electric screwdriver mounting base 6 and the entire intelligent electric screwdriver 4 to move downward along guide rail 2. During this process, the first spring 13 is stretched, and its elasticity acts as a buffer, absorbing some kinetic energy and making the downward movement of intelligent electric screwdriver 4 smoother and gentler. Conversely, when the piston rod of cylinder 15 retracts, it pulls push rod 14 upward, compressing the first spring 13, which also acts as a buffer, allowing intelligent electric screwdriver 4 to rise smoothly.

[0030] It is important to note that the vertical travel of the intelligent electric screwdriver 4 is precisely controlled. When it moves to its highest position, the lower end of its bit 5 remains inserted inside the suction tube 8. This design ensures that the screw being attracted is always surrounded or shielded by the suction tube 8, preventing it from falling off from above. When the intelligent electric screwdriver 4 moves to its lowest position, the lower end of the bit 5 extends completely out of the suction tube 8, allowing the screw to be smoothly screwed into the threaded hole of the workpiece.

[0031] The buffer unit is a secondary buffer mechanism independent of the drive unit, mainly used to absorb the remaining kinetic energy of the intelligent electric screwdriver 4 at the end of its downward stroke. Figure 2As shown, the unit includes a guide rod 16 fixedly mounted on the upper surface of the straw mounting base 7. A second spring 18 is sleeved around the outer ring of the guide rod 16. A pressure block 17 is fixedly connected to the top of the second spring 18, and the pressure block 17 is slidably sleeved on the guide rod 16. In order to ensure that the pressure block 17 can only move axially along the guide rod 16 without deflection, the upper surface of the pressure block 17 should be lower than the top of the guide rod 16 when the second spring 18 is in its natural extension state.

[0032] A limiting plate 19 is fixedly installed on the electric screwdriver mounting base 6, directly opposite the pressure block 17. The limiting plate 19 has a limiting hole 20 that matches the diameter of the guide rod 16. When the electric screwdriver mounting base 6 moves downwards to near the end of its stroke, the limiting plate 19 first contacts and presses down on the pressure block 17. As the electric screwdriver mounting base 6 continues to move downwards, the pressure block 17 is forced to move downwards along the guide rod 16, compressing the second spring 18. The second spring 18 absorbs the kinetic energy of the electric screwdriver mounting base 6 and the intelligent electric screwdriver 4 it carries through its elasticity, thereby greatly slowing down its downward movement and creating a soft landing effect. This not only protects the screw from falling off due to impact but also prevents the bit 5 of the intelligent electric screwdriver 4 from being damaged by a hard collision with the workpiece. Simultaneously, the guide rod 16 inserts into the limiting hole 20; this fit ensures that the electric screwdriver mounting base 6 maintains good alignment during the pressing process and does not wobble.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An adsorption-type locking unit, comprising a base (1) and a smart electric screwdriver (4) mounted on the base (1), characterized in that, Also includes: The negative pressure unit is installed on the base (1) and generates negative pressure to attract the screw to the bit (5) of the smart electric screwdriver (4); The drive unit is mounted on the base (1) and is used to push the intelligent electric screwdriver (4) up and down to deliver the screw on the screwdriver bit (5) to the part to be installed. A buffer unit is installed on the base (1) to absorb the kinetic energy of the intelligent electric screwdriver (4) when it moves downward.

2. The adsorption-type locking unit according to claim 1, characterized in that, The base (1) has a guide rail (2) fixedly mounted vertically in the center of the front side. A slider (3) is slidably mounted on the guide rail (2). An electric screwdriver mounting seat (6) is fixedly mounted on the slider (3). The electric screwdriver mounting seat (6) is used to install a smart electric screwdriver (4).

3. The adsorption-type locking unit according to claim 2, characterized in that, The negative pressure unit includes a straw (8), an air tube (9) and a pressure gauge (10). The straw (8) is fixedly installed on the bottom front of the base (1) via a straw mounting seat (7). The pressure gauge (10) is installed on the top front of the base (1). The pressure gauge (10) is connected to the straw (8) via the air tube (9).

4. The adsorption-type locking unit according to claim 1, characterized in that, The drive unit includes a cylinder (15) fixedly mounted on a base (1). A push rod (14) is fixedly connected to the piston rod of the cylinder (15). A lower retaining ring (11) is fixedly sleeved below the outer ring of the push rod (14), and an upper retaining ring (12) is slidably sleeved above it. A first spring (13) is provided between the upper retaining ring (12) and the lower retaining ring (11).

5. The adsorption-type locking unit according to claim 3, characterized in that, The buffer unit includes a guide rod (16) fixedly disposed on the upper surface of the straw mounting base (7), and a second spring (18) is sleeved on the outer ring of the guide rod (16), and a pressure block (17) is fixedly disposed on the top of the second spring (18).

6. The adsorption-type locking unit according to claim 5, characterized in that, The pressure block (17) is slidably sleeved on the guide rod (16).

7. The adsorption-type locking unit according to claim 6, characterized in that, The electric screwdriver mounting base (6) is fixedly provided with a limiting plate (19) at the position opposite to the pressure block (17), and the limiting plate (19) is provided with a limiting hole (20) for accommodating the guide rod (16) at the position opposite to the guide rod (16).

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