Automatic screw locking machine for switches and sockets

Abstract

The present invention relates to the technical field of screw locking machines, and in particular to an automatic screw locking machine for switches and sockets, comprising an electric push rod, a round rod, a round ring, a silicone ring and a tightening assembly; an electric push rod is fixedly connected to a connecting block; a plurality of round rods are fixedly connected to the telescopic end of the electric push rod, and the round rods are sealed and slidably connected to a cylinder; a round ring is commonly connected between all the round rods, and the round ring is in contact with the cylinder; a silicone ring is fixedly connected to the lower side of the ring, and the silicone ring is in contact with the cylinder; in the process of transferring the screw, the screw can be stably fixed by the negative pressure of the cylinder and the cylinder limit, and the screw can be prevented from falling off due to the inertia force and other external forces generated by rapid start and stop. In the process of inserting the screw into a deep hole, the silicone ring and the screwdriver cooperate to keep the screw moving vertically downward to the bottom of the deep hole, so that the screw can be stably screwed into the deep hole of the socket, and skewness can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of screw locking machines, and more particularly to an automatic screw locking machine for switches and sockets. Background Art

[0002] During the assembly process of switches and sockets, deep-hole screw locking operations face special challenges. For screws that do not have magnetic properties, a vacuum screw locking machine is required. The device uses vacuum adsorption to transport the screws to the upper part of the deep hole. However, since the outer diameter of the suction nozzle end is too large, it cannot penetrate deep into the hole. The screw can only be released at the hole mouth and allowed to fall freely to the bottom of the hole. When the screwdriver is then inserted into the hole to tighten it, the inner diameter of the deep hole is only slightly larger than the maximum outer diameter of the screw, and there is a lack of a guide device during the falling process, which makes it difficult for the screw to maintain a vertical position. This unconstrained falling method can easily cause the screw to deflect when entering the hole, ultimately affecting the structural stability after tightening.

[0003] In summary, this application proposes an automatic screw locking machine for switches and sockets to improve the technical problems mentioned above. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art vacuum screw locking machine that the outer diameter of the suction nozzle is too large to penetrate deep holes, resulting in a lack of guidance when the screws fall freely and are easily deflected, thus affecting the structural stability after tightening, the present invention provides an automatic screw locking machine for switches and sockets.

[0005] Technical solution:

[0006] Disclosed is an automatic screw locking machine for switches and sockets, comprising a connecting block, a cylinder and a pipe; the connecting block is fixedly connected to the cylinder; the cylinder is connected to the pipe; the machine also comprises an electric push rod, a round rod, a ring, a silicone ring and a tightening assembly; the connecting block is fixedly connected to the electric push rod; a plurality of round rods are fixedly connected to the telescopic end of the electric push rod, and the round rods are in sealed sliding connection with the cylinder; a ring is commonly connected between all the round rods, and the ring is in contact with the cylinder; a silicone ring is fixedly connected to the lower side of the ring, and the silicone ring is in contact with the cylinder; a groove is provided on the lower side of the silicone ring; the cylinder is connected to the tightening assembly, and the tightening assembly is used to tighten the screws.

[0007] In addition, it is particularly preferred that in the above-mentioned automatic screw locking machine for switches and sockets, the tightening assembly includes an electric push rod 2, a motor, a screwdriver and a ring 2; the electric push rod 2 is fixedly connected to the connecting block 1; the telescopic end of the electric push rod 2 is fixedly connected to the motor; the screwdriver is fixedly connected to the output end of the motor, and the lower end of the screwdriver is located on the inner side of the cylinder; the ring 2 is sealed and rotatably connected to the cylinder, and the ring 2 is sealed and slidingly connected to the screwdriver.

[0008] In addition, it is particularly preferred that, in the above-mentioned automatic screw locking machine for switches and sockets, the outer diameter of the lower part of the silicone ring is smaller than the outer diameter of the upper part; and a gap is formed between the cylinder and the silicone ring.

[0009] In addition, it is particularly preferred that the above-mentioned automatic screw locking machine for switches and sockets also includes a protective component, which includes a circular ring three, a connecting block two and a spring one; the lower ends of all round rods are commonly fixed with a circular ring three, and the circular ring three is in contact with the circular ring one; the circular ring three is slidingly connected with a connecting block two, and the connecting block two is fixed to the circular ring one; the connecting block two is fixed with a spring one, and the spring one is fixed to the circular ring three.

[0010] In addition, it is particularly preferred that the above-mentioned automatic screw locking machine for switches and sockets also includes an auxiliary component, which includes a linkage block, a round rod two and a spring two; a round hole is opened on the round ring one; the connecting block two is slidably connected to the round rod two, the round rod two passes through the round hole on the round ring one, and the lower end of the round rod two is fixed to the silicone ring; the upper end of the round rod two is fixed to the spring two, and the spring two is fixed to the connecting block two; the linkage block is fixed to the round rod two, and the end of the linkage block is provided with a slope; the round ring three is provided with an inclined portion, and the inclined portion cooperates with the linkage block.

[0011] In addition, it is particularly preferred that in the above-mentioned automatic screw locking machine for switches and sockets, the linkage block and the inclined portion are both made of wear-resistant material.

[0012] In addition, it is particularly preferred that, in the above-mentioned automatic screw locking machine for switches and sockets, the surface of the linkage block is set to be a smooth surface.

[0013] In addition, it is particularly preferred that, in the above-mentioned automatic screw locking machine for switches and sockets, a second groove is provided at a position on the upper side of the silicone ring corresponding to the second round rod.

[0014] In addition, it is particularly preferred that, in the above-mentioned automatic screw locking machine for switches and sockets, an air pressure sensor is provided in the cylinder.

[0015] In addition, it is particularly preferred that in the above-mentioned automatic screw locking machine for switches and sockets, a chamfer is provided on the lower side of the cylinder.

[0016] Beneficial effects:

[0017] 1. During the screw transfer process, the cylinder negative pressure and cylinder limit can stably fix the screw to prevent the screw from falling off due to the inertia force and other external forces generated by rapid start and stop. During the screw insertion into the deep hole, the silicone ring and screwdriver cooperate to keep the screw moving vertically downward to the bottom of the deep hole, so that the screw can be stably screwed into the deep hole of the socket to avoid skew.

[0018] Second, by setting the outer diameter of the lower part of the silicone ring smaller than the outer diameter of the upper part, a gap is formed between the upper part of the silicone ring and the cylinder, providing space for the silicone ring to deform, preventing the screw from pressing the silicone ring against the inner wall of the cylinder, thereby avoiding the problem of difficulty in movement and shortening the service life;

[0019] 3. Under the cooperation of the circular ring 3 and the connecting block 2, in the initial stage of screwing the screw into the deep hole thread, the silicone ring can still suck the screw tightly, providing a straightening effect for the screw, which is beneficial to improve the stability of the screw-in operation;

[0020] Fourth, when the connecting block 2 slides inside the circular ring 3, it can also cooperate with the linkage block to drive the circular rod 2 to move upward, so that the circular rod 2 can easily lift the silicone ring from the end, which is beneficial to reducing the stress and deformation degree of the silicone ring when it is separated from the screw, and is beneficial to increasing the life of the silicone ring;

[0021] 5. By providing a second groove on the silicone ring, the silicone ring can be prevented from being crushed. At the same time, the side of the silicone ring close to the second round rod can be more easily tilted upward, thereby making it easier for the silicone ring to detach from the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shows a schematic structural diagram of the automatic screw locking machine for switches and sockets of the present invention;

[0023] Figure 2 A cross-sectional view of the automatic screw locking machine for switches and sockets according to the present invention is shown;

[0024] Figure 3 Shown is a schematic structural diagram of the silicone ring of the present invention;

[0025] Figure 4 Shows a front view of the silicone ring of the present invention;

[0026] Figure 5 Shows a schematic structural diagram of the protection assembly of the present invention;

[0027] Figure 6 An exploded view of a first perspective of the protection assembly of the present invention is shown;

[0028] Figure 7 A second perspective exploded view of the protection assembly of the present invention is shown;

[0029] Figure 8 Shows a schematic diagram of the installation position of the silicone ring of the present invention;

[0030] Figure 9 A first structural schematic diagram of the connecting portion of the present invention is shown;

[0031] Figure 10 A second structural schematic diagram of the connecting portion of the present invention is shown.

[0032] In the figure: 1-connecting block 1, 2-cylinder, 3-pipe, 4-electric push rod 1, 5-round rod 1, 6-round ring 1, 7-silicone ring, 8-screw, 201-electric push rod 2, 202-motor, 203-screwdriver, 204-round ring 2, 205-round ring 3, 206-connecting block 2, 207-spring 1, 208-linkage block, 209-round rod 2, 2010-spring 2, 91-groove 1, 92-gap, 93-inclined part, 94-groove 2, 95-connecting part. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0034] Example 1

[0035] A switch socket automatic screw locking machine, such as Figure 1-Figure 7 As shown, it includes a connecting block 1, a cylinder 2 and a pipe 3; the connecting block 1 is bolted to the cylinder 2; the cylinder 2 is connected to and fixed with the pipe 3; it also includes an electric push rod 4, a round rod 5, a ring 6, a silicone ring 7 and a tightening assembly; the connecting block 1 is bolted to the electric push rod 4; the telescopic end of the electric push rod 4 is fixedly connected to two round rods 5, the round rods 5 are sealed and slidably connected to the cylinder 2, and the round rods 5 are set to a smooth material; all the round rods 5 are commonly connected to a ring 6, and the ring 6 is in contact with the cylinder 2; the lower side of the ring 6 is fixedly connected to the silicone ring 7, and the silicone ring 7 is in contact with the cylinder 2; the lower side of the silicone ring 7 is provided with a groove 91; the cylinder 2 is connected to the tightening assembly.

[0036] The tightening assembly includes an electric push rod 201, a motor 202, a screwdriver 203 and a ring 204; the electric push rod 201 is bolted to the connecting block 1; the telescopic end of the electric push rod 201 is fixedly connected to the motor 202; the output end of the motor 202 is fixedly connected to the screwdriver 203, and the lower end of the screwdriver 203 is located on the inner side of the cylinder 2, and the screwdriver 203 is used to drive the screw 8 to rotate; the ring 204 is sealed and rotatably connected to the cylinder 2, and the ring 204 is sealed and slidably connected to the screwdriver 203.

[0037] The outer diameter of the lower part of the silicone ring 7 is smaller than the outer diameter of the upper part; a gap 92 is formed between the cylinder 2 and the silicone ring 7 to provide a deformation space for the silicone ring 7.

[0038] It also includes a protection component, which includes a circular ring 3 205, a connecting block 206 and a spring 1 207; the lower ends of all round rods 1 5 are fixedly connected to the circular ring 3 205, and the circular ring 3 205 is in contact with the circular ring 1 6, and the circular ring 3 205 is set to a metal material; the circular ring 3 205 is slidably connected to the connecting block 206, and the connecting block 206 is fixedly connected to the circular ring 1 6; the connecting block 206 is fixedly connected to the spring 1 207, and the spring 1 207 is fixedly connected to the circular ring 3 205.

[0039] First, the connecting block 1 is fixedly installed on the external robotic arm, the external air pump is connected to the pipe 3, the screw 8 is initially placed in the external screw disk, and the connecting block 1 and the parts on it are driven by the external robotic arm to move, so that the cylinder 2 moves to the top of the screw 8, and then the cylinder 2 is controlled by the external robotic arm to move downward, as shown in FIG. Figure 3As shown, the screw 8 is inserted into the inner side of the cylinder 2 and is in close contact with the silicone ring 7. At this time, the outer ring surface of the screw 8 is in close contact with the inner wall of the cylinder 2. The screw 8 is positioned in a vertical state through the cylinder 2. After the upper side of the screw 8 is in close contact with the silicone ring 7, a sealed space is formed inside the cylinder 2. Then, the external air pump sucks air into the pipe 3, so that the air in the cylinder 2 is discharged through the pipe 3, and the sealed space inside the cylinder 2 is in a negative pressure state, thereby sucking the screw 8 tightly to the lower end of the cylinder 2. In this process, the silicone ring 7 will be pressed against the upper side of the screw 8 and squeeze out the air in the groove 91, so that the silicone ring 7 is sucked tightly to the upper side of the screw 8, and then the external robotic arm is used to carry The movable connecting block 1 and the parts thereon move, so that the cylinder 2 moves to the top of the deep hole of the socket, and then the connecting block 1 and the parts thereon are driven downward by the external mechanical arm, so that the screw 8 is inserted into the upper part of the deep hole, and the lower end of the cylinder 2 contacts the socket. In the process of transferring the screw 8 from the screw disk to the deep hole of the socket, the screw 8 can be stably fixed under the negative pressure suction and the limiting effect of the cylinder 2, so as to prevent the screw 8 from falling off due to the inertia force generated by rapid start and stop, the machine vibration force and other external interference forces. Then, the electric push rod 201 drives the motor 202 to move downward, and the motor 202 drives the screwdriver 203 to move in the ring 204. The screwdriver 203 is moved downwardly by the electric push rod 201, so that the lower end of the screwdriver 203 is inserted into the upper end of the screw 8. Then the electric push rod 104 drives the round rod 105 to move downwardly, the round rod 105 drives the circular ring 106 to move downwardly, the circular ring 107 drives the silicone ring 7 to move downwardly, and the silicone ring 7 drives the screw 8 to move downwardly. The screwdriver 203 is controlled to move downwardly by the electric push rod 201, so that the screw 8 and the screwdriver 203 move downwardly synchronously to the bottom of the deep hole. In this process, under the suction force of the silicone ring 7 and the limiting effect of the screwdriver 203, the screw 8 can keep moving vertically downward to the bottom of the deep hole. The motor 202 is started, the motor 202 drives the screwdriver 203 to rotate, and the screwdriver 203 drives the circular ring 204 When the screw 8 is inserted into the deep hole, the silicone ring 7 and the screwdriver 203 cooperate with each other to keep the screw 8 moving vertically downward to the bottom of the deep hole, so that the screw 8 can be stably screwed into the deep hole of the socket to avoid skew.

[0040] Parameter analysis: Screw 8 is set to M6x20mm round head screw, made of 316L stainless steel; the screw head diameter D =10mm, cross slot width w =3mm (center area), mass m=0.02kg; outer diameter of silicone ring D outer=10mm, inner diameter D inner=4mm (avoid cross groove), ring width b =3mm; Silicone ring material: high elastic silicone (hardness Shore A30), elastic modulus E≈1MPa; 316L stainless steel surface roughness Ra =0.8 μ m, friction coefficient μ =0.4 (conservative value).

[0041] The calculation formula for the effective adsorption area of ​​the silicone ring is:

[0042]

[0043] The formula for calculating the screw gravity is:

[0044]

[0045] The calculation formula for the effective adsorption force of the silicone ring is:

[0046]

[0047] The maximum static friction calculation formula is:

[0048]

[0049]

[0050] Conclusion: The silicone ring can stably absorb the screw.

[0051] When the screw 8 is pressed against the silicone ring 7, the silicone ring 7 will deform adaptively and press against the inner wall of the cylinder 2. As a result, when the silicone ring 7 is subsequently moved out of the cylinder 2, a relatively large friction force will be generated between the silicone ring 7 and the cylinder 2. This will not only interfere with the movement of the silicone ring 7, but also the additional friction force during the sliding process of the silicone ring 7 will reduce its service life. Therefore, the outer diameter of the lower part of the silicone ring 7 is set to be smaller than the upper outer diameter, such as Figure 4 As shown, the upper part of the silicone ring 7 contacts the inner wall of the cylinder 2 to provide a sealing effect, and a gap 92 is formed between the lower part of the silicone ring 7 and the cylinder 2. After the silicone ring 7 is squeezed by the screw 8, the lower part of the silicone ring 7 can be deformed toward the gap 92, which effectively avoids the problem of the silicone ring 7 being tightly pressed against the inner wall of the cylinder 2. When in use, by setting the outer diameter of the lower part of the silicone ring 7 smaller than the outer diameter of the upper part, a gap 92 is formed between the lower part of the silicone ring 7 and the cylinder 2, providing space for the silicone ring 7 to deform, and avoiding the screw 8 from pressing the silicone ring 7 against the inner wall of the cylinder 2, thereby avoiding the problems of difficulty in movement and reduced service life.

[0052] When the screw 8 is screwed into the deep hole, the screwdriver 203 drives the screw 8 to rotate, the screw 8 drives the silicone ring 7 to rotate, the silicone ring 7 drives the circular ring 1 6 to rotate, the circular ring 1 6 drives the connecting block 2 206 to perform a circular motion in the circular ring 3 205, and compresses the spring 1 207. When the connecting block 206 moves to the extreme position, the connecting block 206 cannot continue to perform a circular motion, so that the circular ring 1 6 and the silicone ring 7 cannot continue to rotate, and the screw 8 continues to rotate and disengages from the silicone ring 7. That is, under the cooperation of the circular ring 3 205 and the connecting block 2 206, in the initial stage when the screw 8 is screwed into the deep hole thread, the silicone ring 7 can still tighten the screw 8, provide a straightening effect for the screw 8, and help improve the stability of the screwing-in operation of the screw 8.

[0053] Example 2

[0054] On the basis of Example 1, Figure 5-Figure 7 As shown, it also includes an auxiliary component, which includes a linkage block 208, a second round rod 209 and a second spring 2010; a round hole is opened on the circular ring 6; the second round rod 209 is slidably connected to the connecting block 206, and the second round rod 209 passes through the round hole on the circular ring 6, and the lower end of the second round rod 209 is fixedly connected to the silicone ring 7; the upper end of the second round rod 209 is fixedly connected to the second spring 2010, and the second spring 2010 is fixedly connected to the connecting block 206; the second round rod 209 is fixedly connected to the linkage block 208, and the end of the linkage block 208 is provided with an inclined surface; the circular ring 3 205 is provided with an inclined portion 93, and the inclined portion 93 cooperates with the linkage block 208 to drive the linkage block 208 to move upward.

[0055] The linkage block 208 and the inclined portion 93 are both made of wear-resistant materials to increase their service life.

[0056] The surface of the linkage block 208 is set to be smooth to reduce friction.

[0057] When the silicone ring 7 is separated from the screw 8 by relative rotation, the silicone ring 7 will be subjected to a horizontal torsional force, which will cause irreversible deformation in the long run, causing interference with the subsequent tightening operation and reducing its service life. At this time, the electric push rod 1 4 can also be used to control the silicone ring 7 to move upward, and the silicone ring 7 and the screw 8 are separated by a vertical pulling force. During this process, the silicone ring 7 will be subjected to a relatively large pulling force to overcome the negative pressure. Therefore, in the initial stage of screw 8 being screwed into the deep hole, the connecting block 206 drives the parts thereon to perform a circular motion, so that the inclined surface of the linkage block 208 contacts the inclined portion 93. At this time, the linkage block 208 is limited by the inclined portion 93, so that the linkage block 208 performs a circular motion. When the screw 8 is in the air, the second round rod 209 is pressed against the second round rod 209, and the second round rod 209 is pressed against the second round rod 209. ...

[0058] Example 3

[0059] On the basis of Example 2, Figure 5-10 As shown, a second groove 94 is provided on the upper side of the silicone ring 7 at a position corresponding to the second round rod 209 to provide a deformation space for the silicone ring 7 .

[0060] An air pressure sensor is provided inside the cylinder 2 for monitoring the air pressure in the space inside the cylinder 2. If the air pressure is detected to be too high during the process of transferring the screw 8, it indicates that the screw 8 has fallen off.

[0061] The lower side of the cylinder 2 is provided with a chamfer to make it easier to insert the screw 8 into the cylinder 2 .

[0062] like Figure 8 As shown, for the convenience of description, the upper end of the connection position between the silicone ring 7 and the round rod 209 is called the connecting portion 95. The connecting portion 95 is close to the lower side of the ring 1 6. When the round rod 209 drives the silicone ring 7 to move upward, the connecting portion 95 will be stuck in the circular hole of the ring 1 6, thereby causing the silicone ring 7 to be crushed. Therefore, Figure 10 As shown, a groove 24 is provided at the position of the silicone ring 7 corresponding to the round rod 209, and the connecting portion 95 is away from the lower side of the round ring 1 6, providing a deformation avoidance space for the connecting portion 95. When the round rod 209 drives the silicone ring 7 to move upward, the connecting portion 95 will not be stuck in the round hole of the round ring 1 6, thereby avoiding the silicone ring 7 from being crushed.

[0063] After the groove 2 94 is opened on the silicone ring 7 , when the round rod 209 pulls the silicone ring 7 upward, the groove 2 94 can also provide space for the silicone ring 7 to deform and tilt, so that the side of the silicone ring 7 close to the round rod 209 can be more easily tilted upward, thereby making it easier for the silicone ring 7 to detach from the screw 8.

[0064] The above embodiments are provided to persons familiar with the art for implementing or using the present invention. Personnel familiar with the art may make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the scope of protection of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. An automatic screw locking machine for a switch socket, comprising a connecting block (1), a cylinder (2) and a pipe (3); the connecting block (1) is fixedly connected to the cylinder (2); the cylinder (2) is connected to the pipe (3); the characteristics are: The invention also includes an electric push rod (4), a round rod (5), a round ring (6), a silicone ring (7) and a tightening assembly; the electric push rod (4) is fixedly connected to the connecting block (1); a plurality of round rods (5) are fixedly connected to the telescopic end of the electric push rod (4), and the round rods (5) are sealed and slidably connected to the cylinder (2); a round ring (6) is commonly connected between all the round rods (5), and the round ring (6) is in contact with the cylinder (2); a silicone ring (7) is fixedly connected to the lower side of the round ring (6), The silicone ring (7) contacts the cylinder (2); a groove (91) is provided on the lower side of the silicone ring (7); a tightening assembly is connected to the cylinder (2), and the tightening assembly is used to tighten the screw (8); a protection assembly is also included, and the protection assembly includes a ring (205), a connecting block (206) and a spring (207); the lower ends of all the round rods (5) are fixedly connected to the ring (205), and the ring (205) contacts the ring (6); the ring (205) slides on the ring The connecting block 2 (206) is connected, and the connecting block 2 (206) is fixedly connected to the circular ring 1 (6); the connecting block 2 (206) is fixedly connected to the spring 1 (207), and the spring 1 (207) is fixedly connected to the circular ring 3 (205); an auxiliary component is also included, and the auxiliary component includes a linkage block (208), a round rod 2 (209) and a spring 2 (2010); a round hole is opened on the circular ring 1 (6); the connecting block 2 (206) is slidably connected to the round rod 2 (209), and the round rod 2 ( 209) passes through the circular hole on the circular ring one (6), and the lower end of the circular rod two (209) is fixedly connected to the silicone ring (7); the upper end of the circular rod two (209) is fixedly connected to the spring two (2010), and the spring two (2010) is fixedly connected to the connecting block two (206); the circular rod two (209) is fixedly connected to the linkage block (208), and the end of the linkage block (208) is provided with an inclined surface; the circular ring three (205) is provided with an inclined portion (93), and the inclined portion (93) cooperates with the linkage block (208).

2. According to the switch socket automatic screw locking machine of claim 1, its characteristics are: The tightening assembly comprises an electric push rod 2 (201), a motor (202), a screwdriver (203) and a circular ring 2 (204); the electric push rod 2 (201) is fixedly connected to the connecting block 1 (1); the telescopic end of the electric push rod 2 (201) is fixedly connected to the motor (202); the output end of the motor (202) is fixedly connected to the screwdriver (203), and the lower end of the screwdriver (203) is located inside the cylinder (2); the circular ring 2 (204) is connected to the cylinder (2) in a sealed rotatable manner, and the circular ring 2 (204) and the screwdriver (203) are in a sealed sliding connection.

3. According to the switch socket automatic screw locking machine of claim 2, its characteristics are: The outer diameter of the lower portion of the silicone ring (7) is smaller than the outer diameter of the upper portion; a gap (92) is formed between the cylinder (2) and the silicone ring (7).

4. The automatic screw locking machine for switches and sockets according to claim 1, characterized in that: The linkage block (208) and the inclined portion (93) are both made of wear-resistant material.

5. The automatic screw locking machine for switches and sockets according to claim 1, characterized in that: The surface of the linkage block (208) is set to a smooth surface.

6. The automatic screw locking machine for switches and sockets according to claim 5, characterized in that: A second groove (94) is provided on the upper side of the silicone ring (7) at a position corresponding to the second round rod (209).

7. The automatic screw locking machine for switches and sockets according to claim 6, characterized in that: An air pressure sensor is provided in the cylinder (2).

8. An automatic screw locking machine for switches and sockets according to any one of claims 1 to 7, characterized in that: The lower side of the cylinder (2) is provided with a chamfer.

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