A kind of automatic locking mechanism of one-slot stop screw

Abstract

The utility model discloses a kind of automatic locking of linear slot stop screw mechanism, the upper surface of base is slidably installed with first sliding seat and second sliding seat, the upper surface of first sliding seat is installed with servo motor, the end of servo motor output shaft is connected with torsion sensor through shaft coupling, the output shaft of torsion sensor is connected with connecting shaft through shaft coupling;The upper surface of second sliding seat is installed with two sleeve plates, the inside of two sleeve plates is provided with a batch head, the upper surface of second sliding seat is installed with first fixed seat, and the end of connecting shaft is connected with batch head by penetrating first fixed seat, blow nail pipe is connected between two sleeve plates, and the end of two sleeve plates away from first fixed seat is rotatably installed with screw bird mouth by torsion spring. It can be automatically fed, automatically align linear slot direction, automatically lock, and torque detection automatically detects whether screw reaches specified torque when locking.

Description

Technical Field

[0001] This utility model relates to the field of automatic locking device technology, and in particular to an automatic locking mechanism for slotted stop screws. Background Technology

[0002] A stop screw, also known as a stop bolt or brake bolt, is a mold accessory used in conjunction with a bolt rod. It is primarily used to control the mold opening stroke between the fixed mold base plate, runner ejector plate, and fixed mold platen in a three-plate mold. By being placed on the parting surface of the mold, it helps to achieve miniaturization in mold design. Stop screws are characterized by high hardness, good toughness, excellent wear resistance, and excellent heat resistance. These properties make them particularly suitable for precision molds and can significantly extend the service life of the mold, especially in high-temperature operating environments, effectively controlling the thermal deformation of precision molds. Therefore, stop screws play a vital role in mold manufacturing and industrial production.

[0003] Currently, most screw fastening technologies on the market are designed for ordinary hex socket screws or Phillips head screws (capped screws), while the fastening technology for slotted head screws still relies on manual operation. Because slotted head screws do not have nuts, automatic feeding, orientation, and slot location are all difficult, resulting in low efficiency and difficulty in controlling the tightening force. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic screw fastening mechanism for slotted screws that automatically feeds, automatically aligns the slot, automatically fastens, and automatically detects whether the screw has reached the specified torque during fastening. This mechanism effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] An automatic locking mechanism for slotted stop screws includes a base. A first sliding seat and a second sliding seat are slidably mounted on the upper surface of the base. A servo motor is fixedly mounted on the upper surface of the first sliding seat. A torque sensor is fixedly mounted on the first sliding seat to the left of the servo motor. The end of the output shaft of the servo motor is connected to the torque sensor via a coupling. The output shaft of the torque sensor is connected to a connecting shaft via a coupling. The second sliding seat is located to the left of the first sliding seat. Two sleeve plates are fixedly mounted on the upper surface of the second sliding seat. Y-shaped grooves are formed on the sides of the two sleeve plates that are close to each other. When the two sleeve plates are closed, the two Y-shaped grooves on the two sleeve plates combine to form a Y-shaped cavity. The Y-shaped cavity consists of two channels: channel a is the channel in the same direction as the output shaft of the servo motor, and channel b... The first sliding seat is at a horizontal angle to channel a and is connected to channel a. A screwdriver bit is slidably connected inside channel a. A first fixed seat is installed on the upper surface of the second sliding seat and on the right side of the sleeve plate. The left end of the connecting shaft passes through the first fixed seat and is connected to the screwdriver bit. A blowpipe is fixedly connected between the two sleeve plates and is connected to channel b. A screw beak is rotatably installed on the left end of each of the two sleeve plates by a torsion spring. A groove is also opened on the side of the two screw beaks that are close to each other. When the two screw beaks are aligned, the grooves on them form a channel. The inner diameter of this channel gradually decreases from right to left and is connected to and coaxial with channel a. A first telescopic cylinder is installed on the upper surface of the base. The end of the telescopic cylinder is connected to the first sliding seat. An elastic connection mechanism is provided between the first sliding seat and the first fixed seat.

[0007] Preferably, the elastic connection mechanism includes a second fixed seat mounted on the upper surface of the first sliding seat, a first sliding rod connected to the outer surface of the second fixed seat, and the end of the first sliding rod extending to the other side of the first fixed seat. A first spring is sleeved on the outer surface of the first sliding rod, and the two ends of the first spring abut against the second fixed seat and the first fixed seat, respectively.

[0008] Preferably, a second telescopic cylinder is installed on the upper surface of the second sliding seat, and a limit sleeve is installed on the left end of the piston rod of the second telescopic cylinder, and the limit sleeve is sleeved on the outside of the two screw beaks.

[0009] Preferably, the piston rod end of the first telescopic cylinder is connected to a second slide rod, a guide plate is installed on the outer surface of the first sliding seat, and the end of the second slide rod extends through to the other side of the guide plate. A second spring is sleeved on the outer surface of the second slide rod and located on the right side of the guide plate. When the piston rod of the first telescopic cylinder extends, the second spring is first squeezed until the elastic force of the second spring is sufficient to push the first sliding seat. When the first sliding seat cannot move to the left, if the piston rod of the first telescopic cylinder continues to extend, the second spring continues to deform to play a protective role.

[0010] Preferably, a screw arrival sensor is provided inside the two sleeve plates and on the side wall of channel b.

[0011] Preferably, a buffer seat is installed on the left side of the second sliding seat, and a guide block is installed on the outer surface of the buffer seat.

[0012] Preferably, after the two screw-beak pieces are combined, the left end of the combined screw-beak piece is tapered.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) This utility model realizes automatic feeding and precise guidance of slotted stop screws through the innovative Y-shaped channel sleeve plate and the openable screw beak structure; the mechanism is driven by a servo motor and combined with a torque sensor for real-time feedback, which can automatically find the slot direction of the screw and accurately control the final torque of the fastening process. This closed-loop control system fundamentally eliminates human interference, ensures that the fastening force of each screw is uniform and meets the process specifications, thereby greatly improving the reliability and consistency of the product.

[0015] (2) The multiple buffer protection mechanism set in this utility model effectively improves the safety and stability of the equipment operation. The elastic connection mechanism between the first sliding seat and the first fixed seat, and the second spring structure between the first telescopic cylinder and the first sliding seat together constitute a progressive buffer system. When the locking is obstructed or an accidental overload occurs, the system can absorb the impact energy through the deformation of the spring to avoid rigid collision, thereby reliably protecting the surface of the processed product and its threaded hole from damage, and at the same time extending the service life of the core components of the mechanism. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a front view structural diagram of the present utility model;

[0018] Figure 3 This is a top view of the structure of this utility model;

[0019] Figure 4 This is a partial structural schematic diagram of the present invention;

[0020] Figure 5 This is a schematic diagram of the screw-bird beak structure in this utility model.

[0021] In the diagram: 100, base; 101, first sliding seat; 102, second sliding seat; 103, servo motor; 104, torque sensor; 105, connecting shaft; 106, first fixed seat; 107, sleeve plate; 108, screwdriver bit; 109, blown nail tube; 110, screw beak; 111, first telescopic cylinder; 200, elastic connecting mechanism; 201, second fixed seat; 202, first sliding rod; 203, first spring; 300, second telescopic cylinder; 301, limit sleeve; 400, second sliding rod; 401, second spring; 402, guide plate; 500, screw arrival sensor; 600, buffer seat; 601, guide block. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] like Figures 1-4 As shown, an automatic locking mechanism for a slotted stop screw includes a base 100. A first sliding seat 101 and a second sliding seat 102 are slidably mounted on the upper surface of the base 100. A servo motor 103 is fixedly mounted on the upper surface of the first sliding seat 101. A torque sensor 104 is fixedly mounted on the first sliding seat 101 and located to the left of the servo motor 103. The end of the output shaft of the servo motor 103 is connected to the torque sensor 104 via a coupling. The output shaft of the torque sensor 104 is connected to a connecting shaft 105 via a coupling. The second sliding seat 102 is located to the left of the first sliding seat 101. Two sleeve plates 107 are fixedly installed on the upper surface of the second sliding seat 102. Y-shaped grooves are opened on the side of the two sleeve plates 107 that are close to each other. When the two sleeve plates 107 are closed, the two Y-shaped grooves on the two sleeve plates 107 combine to form a Y-shaped cavity. The Y-shaped cavity consists of two channels. Channel a is the same as the direction indicated by the output shaft of the servo motor 103. Channel b has a horizontal angle with channel a and is connected to channel a. A bit 108 is slidably connected in channel a. A first fixed seat 106 is installed on the upper surface of the second sliding seat 102 and on the right side of the sleeve plate 107. The left end of the connecting shaft 105 passes through the first fixed seat 106 and is connected to the bit 108.

[0024] like Figure 1 , Figures 4-5As shown, a blown nail tube 109 is fixedly connected between the two sleeve plates 107. The blown nail tube 109 communicates with channel b. A screw beak 110 is rotatably installed on the left end of each of the two sleeve plates 107 via a torsion spring. A groove is also opened on the side of the two screw beaks 110 that are close to each other. After the two screw beaks 110 are aligned, the grooves on them form a channel. The inner diameter of this channel gradually decreases from right to left and communicates with and is coaxial with channel a. A first telescopic cylinder 111 is installed on the upper surface of the base 100. The end of the telescopic end of the first telescopic cylinder 111 is connected to the first sliding seat 101. An elastic connection mechanism 200 is provided between the first sliding seat 101 and the first fixed seat 106.

[0025] like Figure 1 , Figure 3 , Figure 5 As shown, after the two screw beaks 110 are combined, the left end of the combined body of the two screw beaks 110 is tapered.

[0026] Since the two screw beaks 110 are distributed vertically, to prevent the two screw beaks 110 from tilting downwards due to gravity, which would cause the conveying path of the slotted stop screw to bend, the second telescopic cylinder 300 drives the limiting sleeve 301 to move to the right. The limiting sleeve 301 then limits the two screw beaks 110, preventing them from tilting downwards. When the bit 108 carries the slotted stop screw into the two screw beaks 110, the bit 108 supports the upper screw beak 110 to limit it. At this time, the second telescopic cylinder 300 can be activated to move the limiting sleeve 301 in the opposite direction, so that it no longer limits the screw beak 110. At this time, the two screw beaks 110 are slowly opened, allowing the slotted stop screw to be accurately conveyed to the screw hole to be installed.

[0027] like Figures 1-4 As shown, the elastic connection mechanism 200 includes a second fixed seat 201 mounted on the upper surface of the first sliding seat 101. A first sliding rod 202 is connected to the outer surface of the second fixed seat 201, and the end of the first sliding rod 202 extends to the other side of the first fixed seat 106. A first spring 203 is sleeved on the outer surface of the first sliding rod 202, and the two ends of the first spring 203 abut against the second fixed seat 201 and the first fixed seat 106 respectively. A second telescopic cylinder 300 is mounted on the upper surface of the second sliding seat 102. A limit sleeve 301 is mounted on the left end of the piston rod of the second telescopic cylinder 300, and the limit sleeve 301 is sleeved on the outside of the two screw beaks 110.

[0028] The flexible connecting mechanism 200 provides a buffer space between the first sliding seat 101 and the second sliding seat 102, preventing product damage due to excessive impact.

[0029] Specifically, when the first sliding seat 101 moves to the left, it first compresses the first spring 203 until the elastic force of the first spring 203 is sufficient to push the second sliding seat 102. When the second sliding seat 102 can no longer move to the left, if the first sliding seat 101 continues to move to the left, the first spring 203 continues to deform to play a protective and buffering role, effectively preventing the product from being damaged due to excessive impact force.

[0030] like Figures 1-3 As shown, the piston rod end of the first telescopic cylinder 111 is connected to a second slide rod 400, a guide plate 402 is installed on the outer surface of the first sliding seat 101, and the end of the second slide rod 400 extends through to the other side of the guide plate 402. A second spring 401 is sleeved on the outer surface of the second slide rod 400 and located on the right side of the guide plate 402.

[0031] When the piston rod of the first telescopic cylinder 111 extends, it first compresses the second spring 401 until the elastic force of the second spring 401 is sufficient to push the first sliding seat 101. When the first sliding seat 101 cannot move to the left, if the piston rod of the first telescopic cylinder 111 continues to extend, the second spring 401 continues to deform to cooperate with the elastic connection mechanism 200 to play a double protection role.

[0032] like Figure 4 As shown, screw arrival sensors 500 are provided inside the two sleeve plates 107 and on the side wall of channel b.

[0033] By setting the screw arrival sensor 500, it is possible to monitor whether the slotted stop screw has entered the screw beak 110, thus avoiding the situation of missing screws.

[0034] like Figure 1 , Figure 4 As shown, a buffer seat 600 is installed on the left side of the second sliding seat 102, and a guide block 601 is installed on the outer surface of the buffer seat 600.

[0035] By setting the buffer seat 600 and the guide block 601, the end of the screw beak 110 can be prevented from directly contacting the product surface, thus avoiding bending damage and the inability to be pried open.

[0036] The working process of this utility model is as follows:

[0037] In use, workers pour the bagged slotted screws into the vibratory feeder (not shown in the diagram), a common feeding device on the market. The vibratory feeder removes screws that do not conform to the required orientation. Screws in the correct orientation are fed into the two screw beaks 110 by air pressure through the blowpipe 109. The first telescopic cylinder 111 drives the screwdriver bit 108 to approach the screw and is driven by the servo motor 103 to reverse and align the slotted screw. Then, the first telescopic cylinder 111 drives the screwdriver bit 108 to push the screw out of the two screw beaks 110, while the servo motor 103 drives the screwdriver bit 108 to push the screw out of the two screw beaks 110. The forward rotation screws the slotted stop screw into the product's threaded hole. When the torque sensor 104 detects that the torque value has reached the set value, the servo motor 103 stops rotating, and the first telescopic cylinder 111 drives the bit 108 to retract. The process continues until the next slotted stop screw is within the two screw beaks 110, thus achieving automatic feeding, automatic slot orientation alignment, and automatic fastening. During fastening, torque detection automatically checks whether the screw has reached the specified torque, significantly improving efficiency, reducing waste caused by screws falling, and offering simple and convenient operation. It takes less than 3 seconds to drive a screw, greatly improving the screw-driving pass rate. Torque detection eliminates the influence of human factors, making the product more reliable.

[0038] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of this utility model. Therefore, any modifications, equivalent changes, or improvements made in accordance with the claims of this utility model shall still fall within the scope of this utility model.

Claims

1. An automatic locking mechanism for a slotted stop screw, characterized in that, Includes a base (100), on which a first sliding seat (101) and a second sliding seat (102) are slidably mounted. A servo motor (103) is fixedly mounted on the upper surface of the first sliding seat (101). A torque sensor (104) is fixedly mounted on the first sliding seat (101) and located to the left of the servo motor (103). The end of the output shaft of the servo motor (103) is connected to the torque sensor (104) through a coupling. The output shaft of the torque sensor (104) is connected to a connecting shaft (105) through a coupling. The second sliding seat (102) is located to the left of the first sliding seat (101). Two sleeve plates (107) are fixedly installed on the upper surface of the second sliding seat (102). The two sleeve plates (107) are provided with Y-shaped grooves on the side close to each other. When the two sleeve plates (107) are closed, the two Y-shaped grooves on the two sleeve plates (107) combine to form a Y-shaped cavity. The Y-shaped cavity is composed of two channels. Channel a is the same as the direction indicated by the output shaft of the servo motor (103). Channel b has a horizontal angle with channel a and is connected to channel a. A bit (108) is slidably connected in channel a. A first fixed seat (106) is installed on the upper surface of the second sliding seat (102) and on the right side of the sleeve plate (107). The left end of the connecting shaft (105) passes through the first fixed seat (106) and is connected to the bit (108). A blown nail tube (109) is fixedly connected between the two sleeve plates (107). The blown nail tube (109) is connected to channel b. A screw beak (110) is installed on the left end of each of the two sleeve plates (107) by a torsion spring. A groove is also opened on the side of the two screw beaks (110) that are close to each other. After the two screw beaks (110) are joined together, the grooves on them form a channel. The inner diameter of this channel gradually decreases from right to left and is connected to channel a and coaxial. The upper surface of the base (100) is equipped with a first telescopic cylinder (111), the end of the telescopic cylinder (111) is connected to the first sliding seat (101), and an elastic connection mechanism (200) is provided between the first sliding seat (101) and the first fixed seat (106).

2. The automatic locking mechanism for a slotted stop screw according to claim 1, characterized in that: The elastic connection mechanism (200) includes a second fixed seat (201) mounted on the upper surface of the first sliding seat (101). The outer surface of the second fixed seat (201) is connected to a first slide rod (202), and the end of the first slide rod (202) extends to the other side of the first fixed seat (106). A first spring (203) is sleeved on the outer surface of the first slide rod (202), and the two ends of the first spring (203) abut against the second fixed seat (201) and the first fixed seat (106) respectively.

3. The automatic locking mechanism for a slotted stop screw according to claim 2, characterized in that: The upper surface of the second sliding seat (102) is equipped with a second telescopic cylinder (300), and the piston rod of the second telescopic cylinder (300) is equipped with a limit sleeve (301) at the left end, and the limit sleeve (301) is sleeved on the outside of the two screw beaks (110).

4. The automatic locking mechanism for a slotted stop screw according to claim 3, characterized in that: The piston rod end of the first telescopic cylinder (111) is connected to a second slide rod (400). A guide plate (402) is installed on the outer surface of the first sliding seat (101), and the end of the second slide rod (400) extends to the other side of the guide plate (402). A second spring (401) is sleeved on the outer surface of the second slide rod (400) and located on the right side of the guide plate (402). When the piston rod of the first telescopic cylinder (111) extends, it first squeezes the second spring (401) until the elastic force of the second spring (401) is sufficient to push the first sliding seat (101). When the first sliding seat (101) cannot move to the left, if the piston rod of the first telescopic cylinder (111) continues to extend, the second spring (401) continues to deform to play a protective role.

5. The automatic locking mechanism for a slotted stop screw according to claim 1, characterized in that: Screw arrival sensors (500) are provided inside the two sleeve plates (107) and on the side wall of the b channel.

6. The automatic locking mechanism for a slotted stop screw according to claim 5, characterized in that, A buffer seat (600) is installed on the left side of the second sliding seat (102), and a guide block (601) is installed on the outer surface of the buffer seat (600).

7. The automatic locking mechanism for a slotted stop screw according to claim 1, characterized in that: When the two screw beaks (110) are combined, the left end of the combined body of the two screw beaks (110) is conical.

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