Automatic assembling machine for fire alarm base

Abstract

The utility model discloses an automatic assembling machine for a fire alarm base, and belongs to the field of automation equipment. The utility model relates to an automatic assembling machine for a base of a fire alarm, which comprises a rack, a base feeding device, a base circulating device, a nut press-fitting device, a terminal mounting device and a screw screwing device, wherein the clamping jaw mechanism between the nut press-fitting station and the terminal installation station comprises a pneumatic clamping jaw and a turn-over air cylinder, the turn-over design is achieved on the base circulation device, nut positive pressing can be achieved on the nut press-fitting face of a base, and terminal installation and screw screwing actions are sequentially completed after turn-over. The structure of the automatic assembling machine for the fire alarm base is simpler; moreover, the nut press-fitting device, the terminal mounting device and the screw screwing device are all provided with rotary positioning seats, so that the base body can be controlled to rotate to switch the assembly positions, and automatic assembly of the base with multiple groups of assembly positions can be met.

Description

Technical Field

[0001] This utility model relates to an automated assembly equipment, and more specifically, to an automatic assembly machine for fire alarm bases. Background Technology

[0002] Figure 1 This is an existing type of fire alarm base, which can be used to install alarm buttons and audible and visual alarms. The fire alarm base mainly consists of a base body 101 and multiple conductive terminals 103 mounted on the base body 101. The structural feature is that six conductive terminals 103 are centrally symmetrically distributed on the base body 101, and each conductive terminal 103 is fixed with a nut 102 and a screw 104. Furthermore, the nuts 102 and screws 104 are located on the front and back sides of the base body 101, respectively. Generally, the nuts 102 are first pressed into the nut mounting groove on the back of the base body 101, and then the base body 101 is flipped to the front to install the conductive terminals 103 and screws 104.

[0003] With the rapid development of automation technology, the use of automated assembly equipment to replace manual assembly has become an inevitable trend. This is especially true for fire alarm bases, where traditional manual assembly is extremely inefficient, labor-intensive, and prone to problems such as missing or loose screws. While many automated assembly machines exist for similar products, such as the product base spring sheet assembly-waxing production line disclosed in patent publication CN116117514A, which includes a product feeding mechanism, a product conveying track, a nut assembly mechanism, a spring sheet assembly mechanism, a screw assembly mechanism, a product flipping mechanism, and a wax sealing mechanism, the product feeding mechanism is connected to one end of the product conveying track, and the other end of the product conveying track is connected to the wax sealing mechanism via the product flipping mechanism. The nut assembly mechanism, spring sheet assembly mechanism, and screw assembly mechanism are sequentially arranged along the product conveying track. This patent application enables nut back pressure, spring sheet installation, and screw tightening, achieving automated assembly of the spring sheet (i.e., conductive terminal) on the base. However, in order to reduce the base flipping action, it requires a complex nut back pressure design, which increases the structural complexity of the nut assembly process; in addition, the base product it is designed for only requires two centrally symmetrically set spring plates, and there is no need to adjust the angle of the base. Therefore, this device is not suitable for assembling the fire alarm base with multiple centrally symmetrically distributed conductive terminals.

[0004] Based on the aforementioned problems with existing technologies, it is necessary to design a dedicated automatic assembly machine to meet the assembly requirements of the fire alarm base. Summary of the Invention

[0005] 1. Technical problem to be solved by the utility model

[0006] The purpose of this utility model is to overcome the above-mentioned shortcomings of the existing technology and provide an automatic assembly machine for fire alarm bases. By adopting the technical solution of this utility model, a flipping design is implemented on the base transfer device, which can achieve positive pressure on the nut pressing surface of the base. After flipping, the terminal installation and screw tightening actions are completed in sequence. There is no need to use a complex nut back pressure design, which makes the structure of the automatic assembly machine for fire alarm bases simpler and the assembly work more stable and efficient. Furthermore, rotating positioning seats are provided on the nut pressing device, terminal installation device and screw tightening device, which can control the rotation of the base body to switch the assembly position, and can meet the automated assembly of bases with multiple assembly positions.

[0007] 2. Technical Solution

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0009] This utility model discloses an automatic assembly machine for fire alarm bases, comprising a frame, a base feeding device, a base transfer device, a nut pressing device, a terminal mounting device, and a screw tightening device. The nut pressing device, terminal mounting device, and screw tightening device are sequentially arranged on the frame, forming nut pressing stations, terminal mounting stations, and screw tightening stations in sequence. The base transfer device is located on the frame and situated to one side of the nut pressing device, terminal mounting device, and screw tightening device. The base feeding device is located at the station preceding the nut pressing station. The base transfer device sequentially transfers the base body from the base feeding device between the nut pressing station, terminal mounting station, and screw tightening station.

[0010] The base transfer device has a gripper mechanism corresponding to each station. The gripper mechanism for transferring the base body between the nut pressing station and the terminal mounting station includes a pneumatic gripper and a flipping cylinder. The pneumatic gripper is mounted on the flipping cylinder and is used to flip the base body from the nut pressing surface to the terminal mounting surface.

[0011] The nut pressing device includes a nut feeding mechanism, a nut gripping and pressing mechanism, and a nut pressing and positioning mechanism. The nut feeding mechanism has a nut positioning seat. The nut pressing and positioning mechanism has a first rotating positioning seat that can be rotated in a controlled manner. The nut gripping and pressing mechanism has a nut gripping slide that can be moved up and down in a controlled manner and can move between the nut positioning seat and the first rotating positioning seat. The base transfer device places the base body on the first rotating positioning seat with the nut pressing surface facing up. The nut gripping slide is used to grip the nut on the nut positioning seat and press it into the nut mounting groove of the base body.

[0012] The terminal mounting device includes a terminal feeding mechanism, a terminal gripping mechanism, and a terminal mounting positioning mechanism. The terminal feeding mechanism has a terminal positioning seat, the terminal mounting positioning mechanism has a second rotating positioning seat that can be rotated in a controlled manner, and the terminal gripping mechanism has a terminal gripping plate that can be moved up and down in a controlled manner and can move between the terminal positioning seat and the second rotating positioning seat. The base transfer device places the base body with the terminal mounting surface facing upward on the second rotating positioning seat. The terminal gripping plate is used to grip the conductive terminals on the terminal positioning seat and place them in the terminal slot of the base body.

[0013] The screw tightening device includes a screw feeding mechanism, a screw gripping mechanism, a screw tightening mechanism, and a screw tightening positioning mechanism. The screw feeding mechanism has a screw positioning seat. The screw tightening positioning mechanism has a third rotating positioning seat capable of controlled rotation. The screw gripping mechanism has a screw gripping block capable of controlled up-and-down movement and moving between the screw positioning seat and the third rotating positioning seat. The base transfer device places the base body on the third rotating positioning seat with the terminal mounting surface facing upwards. The screw gripping block is used to grip the screw on the screw positioning seat and move it to the screw hole of the base body. The screw tightening mechanism has an electric screwdriver for tightening the screw to a nut on the back of the base body.

[0014] Furthermore, the base loading device includes a lower frame, and a pushing and storing mechanism, a discharging mechanism, and a direction adjustment mechanism respectively disposed on the lower frame. The discharging mechanism is disposed on one side of the pushing and storing mechanism and is used to receive stacks of base bodies conveyed by the pushing and storing mechanism. The direction adjustment mechanism includes a support platform, a pallet assembly, a discharging track, a lifting cylinder, and a servo motor. The discharging mechanism is connected to the discharging track and is used to convey stacks of base bodies one by one onto the discharging track. A support platform is disposed above the other end of the discharging track. The support platform has through holes through which the base bodies can pass. The pallet assembly is disposed on the support platform and is used to place the base bodies on the pallet assembly after they pass through the through holes of the support platform, so that the base transfer device can grasp and transfer the base bodies. The servo motor is mounted on the drive end of the lifting cylinder and can be driven by the lifting cylinder to move the servo motor from the lower end of the discharging track to the upper part of the support platform, so as to drive the base bodies to rotate and change direction.

[0015] Furthermore, the base transfer device also includes a longitudinal transfer mechanism and a transverse transfer mechanism for driving the movement of each gripper mechanism. The longitudinal transfer mechanism is provided in at least two sets at intervals along the transfer direction of the base body. Each set of the longitudinal transfer mechanism includes a fixed seat, a longitudinal slide, a longitudinal drive cylinder, and a lifting cylinder. The fixed seat is fixedly installed on the frame. The longitudinal slide is slidably mounted on the fixed seat along the transfer direction perpendicular to the base body. The longitudinal drive cylinder is mounted on the fixed seat, and its drive end is connected to the longitudinal slide. The lifting cylinder is mounted on the longitudinal slide. The transverse transfer mechanism includes a lifting platform, a transverse drive cylinder, and a transverse slide rod. The lifting platform is fixedly installed on the drive end of the lifting cylinder of each set of the longitudinal transfer mechanism. The transverse slide rod is slidably mounted on the lifting platform along the transfer direction of the base body. The transverse drive cylinder is mounted on the lifting platform, and its drive end is connected to the transverse slide rod. Each set of gripper mechanisms is installed on the transverse slide rod at equal intervals.

[0016] Furthermore, in the nut pressing device, the nut feeding mechanism further includes a nut vibratory plate and a nut conveying slide, the nut vibratory plate being connected to the nut positioning seat via the nut conveying slide; the nut gripping and pressing mechanism further includes a nut pressing bracket, a lifting seat plate, a pressing cylinder, and a slide side-shifting cylinder, the lifting seat plate being slidably mounted on the upper part of the nut pressing bracket via guide columns, the pressing cylinder being mounted on the top of the nut pressing bracket and connected to the lifting seat plate, the nut gripping slide being horizontally slidably mounted on the lower part of the lifting seat plate, the slide side-shifting cylinder being mounted on one side of the lifting seat plate and connected to the nut gripping slide, and a nut gripping pressure pin being provided on the lower side of the nut gripping slide; the nut pressing and positioning mechanism further includes a nut pressing seat and a first rotating motor, the first rotating positioning seat being rotatably mounted on the nut pressing seat, the first rotating motor being drively connected to the first rotating positioning seat and used to drive the first rotating positioning seat to rotate to switch the assembly position.

[0017] Furthermore, in the terminal mounting device, the terminal feeding mechanism further includes a terminal vibratory feeder and a terminal conveying slide, the terminal vibratory feeder being connected to the terminal positioning seat via the terminal conveying slide; the terminal gripping mechanism further includes a terminal gripping fixing plate, a side-shifting slide plate, a side-shifting drive cylinder, and a lifting gripping cylinder, the side-shifting slide plate being horizontally slidably mounted on the terminal gripping fixing plate, the side-shifting drive cylinder being mounted on one side of the terminal gripping fixing plate and connected to the side-shifting slide plate, the terminal gripping plate being vertically slidably mounted on the side-shifting slide plate, the lifting gripping cylinder being mounted on the upper part of the side-shifting slide plate and connected to the terminal gripping plate, and a terminal gripping head being provided on the lower side of the terminal gripping plate; the terminal mounting and positioning mechanism further includes a terminal mounting seat and a second rotary motor, the second rotary positioning seat being rotatably mounted on the terminal mounting seat, the second rotary motor being drively connected to the second rotary positioning seat and used to drive the second rotary positioning seat to rotate to switch the assembly position.

[0018] Furthermore, the terminal positioning seat has a terminal positioning groove, and the terminal positioning seat is mounted on the terminal steering cylinder. The terminal steering cylinder drives the terminal positioning seat to rotate to change the installation direction of the conductive terminal. One side of the terminal positioning seat is also provided with a positioning protrusion and a stop block that positions and cooperates with the positioning protrusion. The terminal steering cylinder is mounted on the drive end of the retraction cylinder, and the retraction cylinder drives the terminal positioning seat to move along the conveying direction of the terminal conveying slide.

[0019] Furthermore, in the screw tightening device, the screw feeding mechanism further includes a screw vibratory feeder and a screw conveying slide, the screw vibratory feeder being connected to the screw positioning seat via the screw conveying slide; the screw gripping mechanism further includes a screw gripping fixing plate, a sliding plate, a sliding drive cylinder, and a screw gripping cylinder, the sliding plate being horizontally mounted on the screw gripping fixing plate, the sliding drive cylinder being mounted on one side of the screw gripping fixing plate and connected to the sliding plate, the screw gripping cylinder being fixed on the sliding plate, and the screw gripping block being connected to the drive end of the screw gripping cylinder via a mounting plate; the screw tightening mechanism further includes a screw gripping mechanism. The screw-tightening mechanism also includes a horizontal plate, a lifting slide, and a screw-tightening cylinder. The lifting slide is slidably mounted on the horizontal plate. The screw-tightening cylinder is mounted on the upper part of the horizontal plate and connected to the lifting slide via a guide rod. The guide rod is equipped with a preload spring for keeping the lifting slide in a depressed state. The electric screwdriver is mounted on the lifting slide. The screw-tightening positioning mechanism also includes a screw-tightening seat and a third rotary motor. The third rotary positioning seat is rotatably mounted on the screw-tightening seat. The third rotary motor is driven by the third rotary positioning seat and is used to drive the third rotary positioning seat to rotate to switch the assembly position.

[0020] Furthermore, after the screw-tightening station, there is a testing station, where a testing device is installed on the frame.

[0021] Furthermore, the detection device includes a detection base, a floating positioning plate, a central guide block, a probe, a pressing cylinder, a pressure plate, an elastic support block, and a buffer spring. The central guide block is mounted on the detection base, the floating positioning plate is guided on the central guide block, the elastic support block is located between the detection base and the floating positioning plate, the probe is vertically mounted on the detection base, the buffer spring acts on the probe to keep the probe in an upward elastic trend, and the upper end of the probe passes through the floating positioning plate. The pressing cylinder is fixedly mounted above the floating positioning plate, and the pressure plate is mounted on the driving end of the pressing cylinder.

[0022] 3. Beneficial effects

[0023] Compared with existing known technologies, the technical solution provided by this utility model has the following beneficial effects:

[0024] (1) This utility model discloses an automatic assembly machine for fire alarm bases, comprising a frame, a base feeding device, a base transfer device, a nut pressing device, a terminal mounting device, and a screw tightening device. The nut pressing device, terminal mounting device, and screw tightening device are sequentially arranged on the frame, forming a nut pressing station, a terminal mounting station, and a screw tightening station in sequence on the frame. The base transfer device is located on the frame and on one side of the nut pressing device, terminal mounting device, and screw tightening device. The base feeding device is located at the station before the nut pressing station. The base transfer device transfers the base body in the base feeding device sequentially between the nut pressing station, the terminal mounting station, and the screw tightening station. The base transfer device has a gripper mechanism corresponding to each station, wherein the gripper mechanism is used to transfer the base body... The gripper mechanism that transfers the body between the nut pressing station and the terminal installation station includes pneumatic grippers and a flipping cylinder. By implementing a flipping design on the base transfer device, positive pressure can be applied to the nut pressing surface of the base. After flipping, the terminal installation and screw tightening actions are completed sequentially. This eliminates the need for a complex nut back pressure design, making the structure of the automatic fire alarm base assembly machine simpler and the assembly work more stable and efficient. Furthermore, the nut pressing positioning mechanism has a first rotating positioning seat that can be rotated under control, the terminal installation positioning mechanism has a second rotating positioning seat that can be rotated under control, and the screw tightening positioning mechanism has a third rotating positioning seat that can be rotated under control. These mechanisms can control the rotation of the base body to switch assembly positions, enabling automated assembly of bases with multiple assembly positions.

[0025] (2) The present invention provides an automatic assembly machine for fire alarm bases. The base feeding device includes a lower frame, a pushing and storing mechanism, a discharging mechanism and a direction adjustment mechanism respectively provided on the lower frame. The direction adjustment mechanism includes a support platform, a tray assembly, a discharging track, a lifting cylinder and a servo motor. During the base feeding process, the direction of the base body can be automatically adjusted to ensure that the base body can enter the next assembly process in the correct direction, which helps to ensure the normal operation of the subsequent assembly process. At the same time, it can reduce the orientation requirements of the base placed in the pushing and storing mechanism.

[0026] (3) The automatic assembly machine for fire alarm base of this utility model includes a base transfer device that further includes a longitudinal transfer mechanism and a transverse transfer mechanism for driving each gripper mechanism to move. The longitudinal transfer mechanism can drive each gripper mechanism to move longitudinally and vertically, and the transverse transfer mechanism can drive each gripper mechanism to move laterally along the base transfer direction, thereby realizing the synchronous transfer of bases at each workstation and making the base transfer action stable and efficient.

[0027] (4) The automatic assembly machine for fire alarm base of this utility model adopts nut vibrating plate feeding for nut pressing device and uses nut gripping pressure pin of nut gripping pressing mechanism to realize nut gripping and assembly. The structure is simple and compact, and the nut pressing is stable and reliable.

[0028] (5) The automatic assembly machine for fire alarm base of this utility model adopts terminal vibratory feeder for terminal installation device and uses terminal gripping head of terminal gripping mechanism to grip and install conductive terminals. The structure is compact and the operation is stable. In addition, the terminal positioning seat can rotate to change the installation direction of conductive terminals, which facilitates the arrangement of terminal vibratory feeder and ensures the compactness of structure. At the same time, the adjustment of the direction of conductive terminals can make gripping and installation more convenient, ensuring the stability and reliability of terminal installation. In addition, during the process of the terminal positioning seat driving the conductive terminals to rotate, the terminal positioning seat can be moved along the conveying direction of terminal conveying slide by the return cylinder, which ensures the stability and positioning accuracy of the conductive terminal rotation action.

[0029] (6) The automatic assembly machine for fire alarm base of this utility model uses a screw vibrating plate for feeding and uses the screw gripping block of the screw gripping mechanism to grip and hold the screw, which makes it convenient to accurately rotate the screw using the screw gripping mechanism and ensures the stable connection between the screw and the nut.

[0030] (7) The present invention provides an automatic assembly machine for fire alarm bases, which has a testing station after the screw-tightening station. The testing station is equipped with a testing device installed on the frame, which can test the assembled fire alarm bases to avoid omissions or incomplete assembly, and ensure the product qualification rate.

[0031] (8) The present invention provides an automatic assembly machine for fire alarm bases. Its testing device includes a testing fixed seat, a floating positioning plate, a central guide block, a probe, a pressing cylinder, a pressure plate, an elastic support block, and a buffer spring. During testing, the pressing cylinder drives the pressure plate to press down the assembled base, and the probe contacts the screw to generate a downward movement for testing. The structure is simple and compact, and the testing is accurate and reliable. Attached Figure Description

[0032] Figure 1 This is a structural diagram of an existing fire alarm base;

[0033] Figure 2 This is a three-dimensional structural diagram of an automatic assembly machine for a fire alarm base according to the present invention.

[0034] Figure 3 This is a three-dimensional structural diagram of an automatic assembly machine for a fire alarm base according to this utility model from another angle;

[0035] Figure 4 This is a schematic diagram of the base feeding device in this utility model;

[0036] Figure 5 This is a schematic diagram of the cooperative structure of the discharge mechanism and the direction adjustment mechanism of the base feeding device in this utility model;

[0037] Figure 6 This is a schematic diagram of an automatic assembly machine for fire alarm bases according to this utility model, omitting the base feeding device;

[0038] Figure 7 This is a schematic diagram of the base transfer device in this utility model;

[0039] Figure 8 This is a schematic diagram of the nut pressing device in this utility model;

[0040] Figure 9 This is a schematic diagram of the structure of the terminal mounting device of this utility model;

[0041] Figure 10 for Figure 9 A magnified schematic diagram of the local structure at point K;

[0042] Figure 11 This is a partial structural schematic diagram of the terminal mounting device of this utility model;

[0043] Figure 12 This is a schematic diagram of the screw tightening device in this utility model;

[0044] Figure 13 This is a three-dimensional structural diagram of the detection device in this utility model;

[0045] Figure 14 This is a cross-sectional view of the detection device in this utility model.

[0046] Explanation of the labels in the diagram:

[0047] 101. Base body; 102. Nut; 103. Conductive terminal; 104. Screw;

[0048] 1. Rack;

[0049] 2. Base feeding device; 21. Lower frame; 22. Pushing and balancing storage mechanism; 22a. Storage space; 22-1. Upper frame; 22-2. Push plate; 22-3. Drive motor; 22-4. Lead screw; 22-5. Lead screw nut; 22-6. Side conveyor belt; 22-7. Discharge baffle; 22-8. Single stack pushing mechanism; 23. Discharge mechanism; 23-1. Drop plate; 23-2. Primary baffle assembly; 23-3. Secondary baffle assembly; 23-4. Receiving cylinder; 23-5. Pushing cylinder; 24. Direction adjustment mechanism; 24-1. Support platform; 24-2. Pallet assembly; 24-3. Discharge track; 24-4. Lifting cylinder; 24-5. Servo motor;

[0050] 3. Base transfer device; 31. Longitudinal movement mechanism; 31-1. Fixed seat; 31-2. Longitudinal slide; 31-3. Longitudinal drive cylinder; 31-4. Lifting cylinder; 32. Lateral movement mechanism; 32-1. Lifting platform; 32-2. Lateral drive cylinder; 32-3. Lateral slide bar; 33. Grip mechanism; 33-1. Pneumatic gripper; 33-2. Grip mounting seat; 33-3. Flipping cylinder;

[0051] 4. Nut pressing device; 4-1. Nut vibratory plate; 4-2. Nut conveying slide; 4-3. Nut positioning seat; 4-4. Nut pressing bracket; 4-5. Lifting seat plate; 4-5a. Guide column; 4-6. Pressing cylinder; 4-7. Nut gripping slide; 4-7a. Nut gripping pressure pin; 4-8. Slide side shifting cylinder; 4-9. Nut pressing seat; 4-10. First rotating positioning seat; 4-11. First rotating motor;

[0052] 5. Terminal mounting device; 5-1. Terminal vibratory feeder; 5-2. Terminal conveying slide; 5-3. Terminal positioning seat; 5-3a. Positioning protrusion; 5-3b. Side stop; 5-3c. Intermediate stop; 5-4. Terminal steering cylinder; 5-5. Retracting cylinder; 5-6. Terminal gripping fixing plate; 5-7. Side-shifting slide plate; 5-8. Side-shifting drive cylinder; 5-9. Terminal gripping plate; 5-9a. Terminal gripping head; 5-10. Lifting gripping cylinder; 5-11. Terminal mounting seat; 5-12. Second rotating positioning seat; 5-13. Second rotating motor;

[0053] 6. Screw tightening device; 6-1. Screw vibratory feeder; 6-2. Screw conveying slide; 6-3. Screw positioning seat; 6-4. Screw gripping fixing plate; 6-5. Sliding plate; 6-6. Sliding drive cylinder; 6-7. Screw gripping cylinder; 6-8. Mounting plate; 6-9. Screw gripping block; 6-10. Horizontal plate; 6-11. Lifting slide; 6-12. Tightening lifting cylinder; 6-13. Preload spring; 6-14. Electric screwdriver; 6-15. Screw tightening seat; 6-16. Third rotary motor;

[0054] 7. Detection device; 7-1. Detection fixing seat; 7-2. Floating positioning plate; 7-3. Central guide block; 7-4. Probe; 7-5. Pressing cylinder; 7-6. Pressure plate; 7-7. Elastic support block; 7-8. Buffer spring. Detailed Implementation

[0055] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0056] [Example]

[0057] This embodiment uses Figure 1 Taking the assembly of the fire alarm base shown as an example, the base body 101 of the fire alarm base has a square structure with a circular through hole in the center, which can be used for positioning by the structure of the base body 101 itself; the base body 101 has multiple terminal mounting slots, and conductive terminals 103 are fixedly installed using nuts 102 and screws 104 respectively. (Refer to...) Figure 2 and Figure 3 As shown, this embodiment of an automatic fire alarm base assembly machine includes a frame 1, a base feeding device 2, a base transfer device 3, a nut pressing device 4, a terminal mounting device 5, and a screw tightening device 6. The nut pressing device 4, terminal mounting device 5, and screw tightening device 6 are sequentially arranged on the frame 1, forming a nut pressing station, a terminal mounting station, and a screw tightening station in sequence on the frame 1. The base transfer device 3 is located on the frame 1 and on one side of the nut pressing device 4, terminal mounting device 5, and screw tightening device 6. The base feeding device 2 is located at the station before the nut pressing station, and the base transfer device 3 sequentially transfers the base body 101 within the base feeding device 2 between the nut pressing station, the terminal mounting station, and the screw tightening station. Wherein:

[0058] like Figure 6 and Figure 7As shown, the base transfer device 3 has gripper mechanisms 33 corresponding to each workstation. The gripper mechanisms 33 used to transfer the base body 101 between the nut pressing station and the terminal installation station include pneumatic grippers 33-1 and flipping cylinders 33-3. The pneumatic grippers 33-1 are mounted on the flipping cylinders 33-3 to flip the base body 101 from the nut pressing surface to the terminal installation surface. The pneumatic grippers 33-1 of the other gripper mechanisms 33 are all mounted via gripper mounting seats 33-2. This allows for the flipping of the base body 101 between the nut pressing station and the terminal installation station, enabling positive pressure on the nut pressing surface of the base, and sequentially completing terminal installation and screw tightening actions after flipping. This eliminates the need for a complex nut back pressure design, simplifying the structure of the automatic fire alarm base assembly machine and making the assembly work more stable and efficient.

[0059] like Figure 8 As shown, the nut pressing device 4 includes a nut feeding mechanism, a nut gripping and pressing mechanism, and a nut pressing and positioning mechanism. The nut feeding mechanism has a nut positioning seat 4-3. The nut pressing and positioning mechanism has a first rotating positioning seat 4-10 capable of controlled rotation. The nut gripping and pressing mechanism has a nut gripping slide 4-7 capable of controlled up-and-down movement and moving between the nut positioning seat 4-3 and the first rotating positioning seat 4-10. The base transfer device 3 places the base body 101 with the nut pressing surface facing upward on the first rotating positioning seat 4-10. The nut gripping slide 4-7 grips the nut 102 on the nut positioning seat 4-3 and presses it into the nut mounting groove of the base body 101. In this way, positive pressure pressing of the nut is achieved. After assembly at one assembly position of the base body 101, the first rotating positioning seat 4-10 can be used to rotate the base body 101 by a set angle to switch to other assembly positions.

[0060] like Figure 9As shown, the terminal mounting device 5 includes a terminal feeding mechanism, a terminal gripping mechanism, and a terminal mounting positioning mechanism. The terminal feeding mechanism has a terminal positioning seat 5-3, the terminal mounting positioning mechanism has a second rotating positioning seat 5-12 capable of controlled rotation, and the terminal gripping mechanism has a terminal gripping plate 5-9 capable of controlled up-and-down movement and moving between the terminal positioning seat 5-3 and the second rotating positioning seat 5-12. The base transfer device 3 places the base body 101 with the terminal mounting surface facing upward on the second rotating positioning seat 5-12. The terminal gripping plate 5-9 is used to grip the conductive terminal 103 on the terminal positioning seat 5-3 and place it in the terminal slot of the base body 101. Similarly, after installing the conductive terminal 103 at one assembly position of the base body 101, the second rotating positioning seat 5-12 can be used to rotate the base body 101 by a set angle to switch to other assembly positions. The conductive terminal 103 is positioned in the corresponding terminal mounting slot on the base body 101, and the mounting hole on the conductive terminal 103 is aligned with the nut.

[0061] like Figure 12 As shown, the screw tightening device 6 includes a screw feeding mechanism, a screw gripping mechanism, a screw tightening mechanism, and a screw tightening positioning mechanism. The screw feeding mechanism has a screw positioning seat 6-3. The screw tightening positioning mechanism has a third rotating positioning seat capable of controlled rotation. The screw gripping mechanism has a screw gripping block 6-9 capable of controlled up-and-down movement and moving between the screw positioning seat 6-3 and the third rotating positioning seat. The base transfer device 3 places the base body 101 with the terminal mounting surface facing upward on the third rotating positioning seat. The screw gripping block 6-9 grips the screw 104 on the screw positioning seat 6-3 and moves it to the screw hole of the base body 101. The screw tightening mechanism has an electric screwdriver 6-14 for tightening the screw 104 to the nut 102 on the back of the base body 101. During the screw tightening process, the screw gripping mechanism can fix the screw 104, keeping the screw 104 vertically above the corresponding nut 102, ensuring the tightening accuracy of the electric screwdriver 6-14. After installing screw 104 at one assembly position of the base body 101, the third rotating positioning seat can be used to drive the base body 101 to rotate at a set angle and switch to other assembly positions.

[0062] The fire alarm base automatic assembly machine described above is equipped with rotating positioning seats on the nut pressing device 4, terminal mounting device 5 and screw tightening device 6. These seats can control the rotation of the base body 101 to switch the assembly position, thus enabling the automated assembly of bases with multiple assembly positions.

[0063] Reference Figure 4 and Figure 5As shown, in this embodiment, the aforementioned base loading device 2 includes a lower frame 21, and a pushing and storing mechanism 22, a discharging mechanism 23, and a direction adjustment mechanism 24 respectively disposed on the lower frame 21. The discharging mechanism 23 is disposed on one side of the pushing and storing mechanism 22 and is used to receive the stack of base bodies 101 conveyed by the pushing and storing mechanism 22. The direction adjustment mechanism 24 includes a support platform 24-1, a pallet assembly 24-2, a discharging track 24-3, a lifting cylinder 24-4, and a servo motor 24-5. The discharging mechanism 23 is connected to the discharging track 24-3 and is used to convey the stack of base bodies 101 one by one onto the discharging track 24-3. The other end of the discharging track 24-3 is provided with a support platform 24-1, and the support platform 24-1 has a... The base body 101 has a through hole through which it passes. The pallet assembly 24-2 is disposed on the support platform 24-1. After the base body 101 passes through the through hole of the support platform 24-1, the base body 101 is placed on the pallet assembly 24-2 so that the base transfer device 3 can grasp and transfer the base body 101. The pallet assembly 24-2 consists of a pallet and a pallet cylinder. Two sets can be arranged opposite each other on the support platform 24-1. The pallet cylinder drives the pallet to extend and retract. During the lifting of the base body 101, the pallet moves outward so that the through hole of the support platform 24-1 is fully opened. When the pallet cylinder drives the pallet to move inward, the pallet can partially block the through hole of the support platform 24-1. At this time, the base body 101 can be supported on the pallet. The servo motor 24-5 is mounted on the drive end of the lifting cylinder 24-4, and can be driven by the lifting cylinder 24-4 to move the servo motor 24-5 from the lower end of the discharge track 24-3 to the upper part of the support platform 24-1, thereby rotating the base body 101 to change its direction. This ensures that the base body 101 can enter the next assembly process in the correct direction, which helps to ensure the normal operation of subsequent assembly processes, and at the same time reduces the orientation requirements of the base placed in the pushing and balancing storage mechanism 22.

[0064] catch Figure 4 and Figure 5As shown, in this embodiment, the aforementioned pushing and storing mechanism 22 includes an upper frame 22-1, a push plate 22-2, a drive motor 22-3, a lead screw 22-4, a lead screw nut 22-5, a side-shifting conveyor belt 22-6, a discharge baffle 22-7, and a single-stack pushing mechanism 22-8. The upper frame 22-1 is fixed on the upper platform of the lower frame 21, and its surroundings are enclosed by baffles to form a storage space 22a. The push plate 22-2 is located inside the storage space 22a and can move towards the lateral conveyor belt 22-6 within the storage space 22a. Specifically, a lead screw 22-4 is provided on one side of the upper frame 22-1, and a lead screw nut 22-5 is threaded onto the lead screw 22-4. The push plate 22-2 is connected to the lead screw nut 22-5, and the drive motor 22-3 is connected to the lead screw 22-4. When the drive motor 22-3 drives the lead screw 22-4 to rotate, the lead screw nut 22-5 drives the push plate 22-2 to move axially along the lead screw 22-4. The push plate 22-2 can be used to push the stacked base bodies 101 towards the lateral conveyor belt 22-6, while ensuring the neat arrangement of the base bodies 101. The side conveyor belt 22-6 is located at the bottom of one side of the storage space 22a. It can move stacks of base bodies 101 toward the discharge baffle 22-7. The single stack pushing mechanism 22-8 is located on the rear side of the discharge baffle 22-7. It mainly consists of a pushing cylinder and a pushing plate. It can push a stack of base bodies 101 from the side conveyor belt 22-6 into the discharge baffle 22-7. The aforementioned discharge mechanism 23 includes a discharge plate 23-1, a primary baffle assembly 23-2, a secondary baffle assembly 23-3, a receiving cylinder 23-4, and a pushing cylinder 23-5. The discharge plate 23-1 is located below the discharge baffle 22-7. The primary baffle assembly 23-2 and the secondary baffle assembly 23-3 are arranged vertically on the discharge plate 23-1. The receiving cylinder 23-4 is located directly below the discharge port of the discharge plate 23-1. The discharge mechanism 23-5 can be achieved through the alternating extension and retraction of the primary baffle assembly 23-2 and the secondary baffle assembly 23-3. The stacked base bodies 101 within the material baffle 22-7 gradually fall, and with the help of the receiving cylinder 23-4, the base bodies 101 can be placed one by one onto one end of the discharge track 24-3. The push-out cylinder 23-5 is located on the opposite side of the direction adjustment mechanism 24. Using the push-out cylinder 23-5, the base bodies 101 can be pushed along the discharge track 24-3 to the bottom of the support platform 24-1. Then, the direction adjustment mechanism 24 pushes the base bodies 101 to the top of the support platform 24-1 and adjusts them to the correct assembly direction. Whether the orientation of the base body 101 on the support platform 24-1 is correct can be detected by a photoelectric sensor or a vision sensor, thereby controlling whether the servo motor 24-5 needs to rotate 90° to change the assembly direction.

[0065] Reference Figure 6 and Figure 7As shown, in this embodiment, the aforementioned base transfer device 3 further includes a longitudinal transfer mechanism 31 and a transverse transfer mechanism 32 for driving each gripper mechanism 33 to move. The longitudinal transfer mechanism 31 is provided in at least two sets at intervals along the transfer direction of the base body 101. Each set of longitudinal transfer mechanisms 31 includes a fixed seat 31-1, a longitudinal transfer slide 31-2, a longitudinal transfer drive cylinder 31-3, and a lifting cylinder 31-4. The fixed seat 31-1 is fixedly installed on the frame 1. The longitudinal transfer slide 31-2 is slidably disposed on the fixed seat 31-1 along the transfer direction perpendicular to the base body 101. The longitudinal transfer drive cylinder 31-3 is installed on the fixed seat 31-1, and the drive end of the longitudinal transfer drive cylinder 31-3 is connected to the longitudinal transfer slide 31-2. The lifting cylinder 31-4 is installed on the longitudinal transfer slide 31-2. The transverse movement mechanism 32 includes a lifting platform 32-1, a transverse movement drive cylinder 32-2, and a transverse movement slide bar 32-3. The lifting platform 32-1 is fixedly mounted on the drive end of the lifting cylinder 31-4 of each set of longitudinal movement mechanisms 31. The transverse movement slide bar 32-3 is slidably mounted on the lifting platform 32-1 along the flow direction of the base body 101. The transverse movement drive cylinder 32-2 is mounted on the lifting platform 32-1, and its drive end is connected to the transverse movement slide bar 32-3. Each set of gripper mechanisms 33 is mounted on the transverse movement slide bar 32-3 at equal intervals. The distance between adjacent gripper mechanisms 33 is equal to the distance between each assembly station. The travel distance of the transverse movement drive cylinder 32-2 is greater than the distance between adjacent gripper mechanisms 33, which enables synchronous rotation of the base at each station, resulting in stable and efficient base transfer.

[0066] Reference Figure 8As shown, in the nut pressing device 4, the nut feeding mechanism also includes a nut vibratory plate 4-1 and a nut conveying slide 4-2. The nut vibratory plate 4-1 is connected to the nut positioning seat 4-3 through the nut conveying slide 4-2. The nuts 102 in the nut vibratory plate 4-1 are arranged and conveyed to the nut positioning seat 4-3 through the nut conveying slide 4-2. The nut gripping and pressing mechanism also includes a nut pressing bracket 4-4, a lifting seat plate 4-5, a pressing cylinder 4-6, and a slide side-shifting cylinder 4-8. The lifting seat plate 4-5 is slidably mounted on the upper part of the nut pressing bracket 4-4 via guide posts 4-5a. The pressing cylinder 4-6 is mounted on the top of the nut pressing bracket 4-4 and connected to the lifting seat plate 4-5. The nut gripping slide 4-7 is horizontally slidably mounted on the lower part of the lifting seat plate 4-5. The slide side-shifting cylinder 4-8 is mounted on one side of the lifting seat plate 4-5 and connected to the nut gripping slide 4-7. A nut gripping pressure pin 4-7a is also provided on the lower side of the nut gripping slide 4-7. The shifting cylinder 4-8 can drive the nut gripping pin 4-7a to move horizontally between the nut positioning seat 4-3 and the first rotating positioning seat 4-10. When the nut gripping pin 4-7a is above the nut positioning seat 4-3, the pressing cylinder 4-6 can drive the nut gripping pin 4-7a to move downward and insert into the nut center hole on the nut positioning seat 4-3, thereby gripping the nut 102. After the nut gripping pin 4-7a drives the nut 102 to move above the first rotating positioning seat 4-10, the pressing cylinder 4-6 drives the nut gripping pin 4-7a and the nut 102 to press down together, pressing the nut 102 into the nut groove of the base body 101. The nut pressing and positioning mechanism also includes a nut pressing seat 4-9 and a first rotating motor 4-11. The first rotating positioning seat 4-10 has a positioning structure of a useful positioning base body 101. The first rotating positioning seat 4-10 is rotatably mounted on the nut pressing seat 4-9. The first rotating motor 4-11 is connected to the first rotating positioning seat 4-10 for transmission, and is used to drive the first rotating positioning seat 4-10 to rotate to switch the assembly position. Figure 1 As shown, there are three pairs of conductive terminals on the base body 101. Therefore, by driving the first rotating positioning seat 4-10 to rotate by a certain angle through the first rotating motor 4-11, an assembly position can be switched. By repeating the above nut pressing process, the pressing of all nuts can be completed.

[0067] Reference Figure 9As shown, in the terminal mounting device 5, the terminal feeding mechanism also includes a terminal vibratory plate 5-1 and a terminal conveying slide 5-2. The terminal vibratory plate 5-1 is connected to the terminal positioning seat 5-3 through the terminal conveying slide 5-2. The conductive terminals 103 in the terminal vibratory plate 5-1 can be neatly arranged and conveyed to the terminal positioning seat 5-3 through the terminal conveying slide 5-2 for the terminal gripping mechanism to grip. The terminal gripping mechanism also includes a terminal gripping fixing plate 5-6, a side-shifting slide plate 5-7, a side-shifting drive cylinder 5-8, and a lifting gripping cylinder 5-10. The side-shifting slide plate 5-7 is horizontally slidably mounted on the terminal gripping fixing plate 5-6. The side-shifting drive cylinder 5-8 is mounted on one side of the terminal gripping fixing plate 5-6 and connected to the side-shifting slide plate 5-7. The terminal gripping plate 5-9 is vertically slidably mounted on the side-shifting slide plate 5-7. The lifting gripping cylinder 5-10 is mounted on the upper part of the side-shifting slide plate 5-7 and connected to the terminal gripping plate 5-9. A terminal gripping head 5-9 is also provided on the lower side of the terminal gripping plate 5-9. a. The lateral shift drive cylinder 5-8 can drive the gripping head 5-9a to move between the terminal positioning seat 5-3 and the second rotating positioning seat 5-12. When the gripping head 5-9a moves above the terminal positioning seat 5-3, the lifting gripping cylinder 5-10 can drive the gripping head 5-9a to move downward to grip the conductive terminal 103 on the terminal positioning seat 5-3. Then, the lateral shift drive cylinder 5-8 drives the conductive terminal 103 to move above the second rotating positioning seat 5-12, and the lifting gripping cylinder 5-10 drives the gripping head 5-9a to move downward to place the conductive terminal 103 on the base body 101. The terminal mounting and positioning mechanism also includes a terminal mounting seat 5-11 and a second rotating motor 5-13. The second rotating positioning seat 5-12 is rotatably mounted on the terminal mounting seat 5-11. The second rotating motor 5-13 is driven by the second rotating positioning seat 5-12 and is used to drive the second rotating positioning seat 5-12 to rotate to switch the assembly position. The positioning structure and rotation control of the second rotating positioning seat 5-12 are similar to those of the first rotating positioning seat 4-10 described above.

[0068] like Figure 10 and Figure 11As shown, in this embodiment, the terminal positioning seat 5-3 has a terminal positioning groove. The terminal positioning seat 5-3 is mounted on the terminal steering cylinder 5-4. The terminal steering cylinder 5-4 drives the terminal positioning seat 5-3 to rotate to change the installation direction of the conductive terminal 103. The terminal positioning seat 5-3 is also provided with a positioning protrusion 5-3a and a stop block that positions and cooperates with the positioning protrusion 5-3a on one side. The terminal steering cylinder 5-4 is mounted on the drive end of the retraction cylinder 5-5. The retraction cylinder 5-5 drives the terminal positioning seat 5-3 to move along the conveying direction of the terminal conveying slide 5-2. The terminal positioning seat 5-3 can rotate to change the installation direction of the conductive terminal 103, facilitating the arrangement of the terminal vibratory feeder and ensuring the compactness of the structure. Simultaneously, adjusting the direction of the conductive terminal 103 makes it easier to grip and install, ensuring the stability and reliability of the terminal installation. Furthermore, during the rotation of the conductive terminal driven by the terminal positioning seat 5-3, the retracting cylinder 5-5 can move the terminal positioning seat 5-3 along the conveying direction of the terminal conveying slide 5-2, ensuring the stability and positioning accuracy of the conductive terminal's rotation. Specifically, the aforementioned nut pressing device 4, terminal mounting device 5, and screw tightening device 6 can all adopt a dual-station design, meaning that two conductive terminals 103 can be assembled at a time. Taking the terminal mounting device 5 as an example, there are two terminal positioning seats 5-3. Side blocks 5-3b are provided on both sides of each terminal positioning seat 5-3, and a middle block 5-3c is provided between the two terminal positioning seats 5-3. The side blocks 5-3b and the middle block 5-3c prevent the conductive terminal 103 from moving during the rotation of the terminal positioning seat 5-3. They also cooperate with the positioning protrusion 5-3a to accurately position the terminal positioning seat 5-3, ensuring the accurate positioning of the conductive terminal 103. To avoid interference between the terminal positioning seat 5-3 and the terminal conveying slide 5-2 during rotation, a retraction cylinder 5-5 is used to move the terminal positioning seat 5-3 slightly away from the terminal conveying slide 5-2, thus ensuring stable rotation of the terminal positioning seat 5-3.

[0069] Reference Figure 12As shown, in the screw tightening device 6, the screw feeding mechanism further includes a screw vibratory feeder 6-1 and a screw conveying slide 6-2. The screw vibratory feeder 6-1 is connected to the screw positioning seat 6-3 via the screw conveying slide 6-2. The screws in the screw vibratory feeder 6-1 are neatly arranged via the screw conveying slide 6-2 and conveyed to the screw positioning seat 6-3. The screw gripping mechanism further includes a screw gripping fixing plate 6-4, a sliding plate 6-5, a sliding drive cylinder 6-6, and a screw gripping cylinder 6-7. The sliding plate 6-5 is horizontally mounted on the screw gripping fixing plate 6-4. The sliding drive cylinder 6-6 is mounted on one side of the screw gripping fixing plate 6-4 and connected to the sliding plate 6-5. The screw gripping cylinder 6-7 is fixed on the sliding plate 6-5. The screw gripping block 6-9 is connected to the drive end of the screw gripping cylinder 6-7 via a mounting plate 6-8. The sliding drive cylinder 6-6 can drive the screw gripping block 6-9. Block 6-9 moves between screw positioning seat 6-3 and third rotating positioning seat. When screw gripping block 6-9 moves above screw positioning seat 6-3, screw gripping cylinder 6-7 drives screw gripping block 6-9 to move down and grip screw 104 on screw positioning seat 6-3. Then, sliding drive cylinder 6-6 drives screw 104 to move above third rotating positioning seat, and screw gripping cylinder 6-7 drives screw 104 to the assembly position of base body 101 and stops to position screw 104 for subsequent screw tightening. The screw tightening mechanism also includes a horizontal plate 6-10, a lifting slide 6-11, and a screw tightening cylinder 6-12. The lifting slide 6-11 is slidably mounted on the horizontal plate 6-10. The screw tightening cylinder 6-12 is mounted on the upper part of the horizontal plate 6-10 and is connected to the lifting slide 6-11 via a guide rod. The guide rod is equipped with a preload spring 6-13 for keeping the lifting slide 6-11 in a depressed state. An electric screwdriver 6-14 is mounted on the lifting slide 6-11. The screw tightening cylinder 6-12 drives the electric screwdriver 6-14 to move downward and contact the upper cap of the screw 104. At this time, the screw tightening cylinder 6-12 further drives the lifting slide 6-11 to move downward, so that the preload spring 6-13 is compressed and generates elastic pressure on the electric screwdriver 6-14. The screw can be tightened by starting the electric screwdriver 6-14. The screw tightening and positioning mechanism also includes a screw tightening seat 6-15 and a third rotary motor 6-16. The third rotary positioning seat is rotatably mounted on the screw tightening seat 6-15, and the third rotary motor 6-16 is connected to the third rotary positioning seat for driving the third rotary positioning seat to rotate and switch the assembly position. The positioning structure and rotation control of the third rotary positioning seat are similar to those of the second rotary positioning seat 5-12 described above.

[0070] like Figure 6As shown, the automatic fire alarm base assembly machine of this embodiment has a testing station after the screw-tightening station. The testing station is equipped with a testing device 7 mounted on the frame 1, which can test the assembled fire alarm base to prevent omissions or improper assembly, thus ensuring the product's pass rate. See details... Figure 13 and Figure 14 As shown, the aforementioned detection device 7 includes a detection fixed base 7-1, a floating positioning plate 7-2, a central guide block 7-3, a probe 7-4, a pressing cylinder 7-5, a pressure plate 7-6, an elastic support block 7-7, and a buffer spring 7-8. The central guide block 7-3 is mounted on the detection fixed base 7-1, the floating positioning plate 7-2 is guided on the central guide block 7-3, and the elastic support block 7-7 is located between the detection fixed base 7-1 and the floating positioning plate 7-2. The elastic support block 7-7 can be made of rubber or the like, so that the floating positioning plate 7-2 can move downward after being pressed. The probe 7-4 is vertically mounted on the detection fixed base 7-1, and the buffer spring 7-8 acts on the probe 7-4 to keep the probe 7-4 maintaining an upward elastic tendency. The upper end of the probe 7-4 passes through the floating positioning plate 7-2. The pressing cylinder 7-5 is fixedly mounted above the floating positioning plate 7-2, and the pressure plate 7-6 is mounted on the drive end of the pressing cylinder 7-5. The base transfer device 3 transfers the assembled base from the third rotating positioning seat to the floating positioning plate 7-2. Then, the pressing cylinder 7-5 drives the pressure plate 7-6 to move downwards and press down on the base. At this time, the floating positioning plate 7-2 moves downwards under pressure, and the probe 7-4 can extend into the nut hole on the back of the base and contact the end of the screw. If there is any omission or improper assembly, the corresponding probe 7-4 will not press down or will press down only slightly, which can be identified by a photoelectric sensor or a vision sensor. This detection device 7 has a simple and compact structure and provides accurate and reliable detection.

[0071] Other components not mentioned in this embodiment are similar to existing technologies. For example, it also includes a control system, which can be a PLC controller. The actions of each mechanism can be coordinated by corresponding sensors detecting the corresponding position signals. The control system automatically controls the entire fire alarm base automatic assembly machine according to the action requirements of the aforementioned mechanisms. This part is similar to existing technologies and is not the main innovation of this utility model, so it will not be described in detail here.

[0072] This utility model discloses an automatic fire alarm base assembly machine. By implementing a flipping design on the base transfer device, it can achieve positive pressure on the nut pressing surface of the base. After flipping, the terminal installation and screw tightening actions are completed sequentially. It eliminates the need for a complex nut back pressure design, making the structure of the automatic fire alarm base assembly machine simpler and the assembly work more stable and efficient. Furthermore, the nut pressing device, terminal installation device, and screw tightening device are all equipped with rotating positioning seats, which can control the rotation of the base body to switch the assembly position, and can meet the automated assembly of bases with multiple assembly positions.

[0073] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An automatic assembly machine for fire alarm bases, comprising a frame (1), a base feeding device (2), a base transfer device (3), a nut pressing device (4), a terminal mounting device (5), and a screw tightening device (6), wherein the nut pressing device (4), the terminal mounting device (5), and the screw tightening device (6) are sequentially arranged on the frame (1), forming a nut pressing station, a terminal mounting station, and a screw tightening station in sequence on the frame (1), wherein the base transfer device (3) is arranged on the frame (1) and located on one side of the nut pressing device (4), the terminal mounting device (5), and the screw tightening device (6), wherein the base feeding device (2) is arranged at the station before the nut pressing station, and the base body (101) in the base feeding device (2) is sequentially transferred between the nut pressing station, the terminal mounting station, and the screw tightening station by the base transfer device (3); Its features are: The base transfer device (3) has a gripper mechanism (33) corresponding to each station. The gripper mechanism (33) for transferring the base body (101) between the nut pressing station and the terminal mounting station includes a pneumatic gripper (33-1) and a flipping cylinder (33-3). The pneumatic gripper (33-1) is mounted on the flipping cylinder (33-3) and is used to flip the base body (101) from the nut pressing surface to the terminal mounting surface. The nut pressing device (4) includes a nut feeding mechanism, a nut gripping and pressing mechanism, and a nut pressing and positioning mechanism. The nut feeding mechanism has a nut positioning seat (4-3). The nut pressing and positioning mechanism has a first rotating positioning seat (4-10) that can be rotated in a controlled manner. The nut gripping and pressing mechanism has a nut gripping slide (4-7) that can be moved up and down in a controlled manner and move between the nut positioning seat (4-3) and the first rotating positioning seat (4-10). The base transfer device (3) places the base body (101) with the nut pressing surface facing up on the first rotating positioning seat (4-10). The nut gripping slide (4-7) is used to grip the nut (102) on the nut positioning seat (4-3) and press it into the nut mounting groove of the base body (101). The terminal mounting device (5) includes a terminal feeding mechanism, a terminal gripping mechanism and a terminal mounting positioning mechanism. The terminal feeding mechanism has a terminal positioning seat (5-3). The terminal mounting positioning mechanism has a second rotating positioning seat (5-12) that can be rotated in a controlled manner. The terminal gripping mechanism has a terminal gripping plate (5-9) that can be moved up and down in a controlled manner and move between the terminal positioning seat (5-3) and the second rotating positioning seat (5-12). The base transfer device (3) places the base body (101) with the terminal mounting surface facing up on the second rotating positioning seat (5-12). The terminal gripping plate (5-9) is used to grip the conductive terminal (103) on the terminal positioning seat (5-3) and place it in the terminal slot of the base body (101). The screw tightening device (6) includes a screw feeding mechanism, a screw gripping mechanism, a screw tightening mechanism, and a screw tightening positioning mechanism. The screw feeding mechanism has a screw positioning seat (6-3). The screw tightening positioning mechanism has a third rotating positioning seat that can be rotated in a controlled manner. The screw gripping mechanism has a screw gripping block (6-9) that can be moved up and down in a controlled manner and move between the screw positioning seat (6-3) and the third rotating positioning seat. The base transfer device (3) places the base body (101) with the terminal mounting surface facing up on the third rotating positioning seat. The screw gripping block (6-9) is used to grip the screw (104) on the screw positioning seat (6-3) and move it to the screw hole of the base body (101). The screw tightening mechanism has an electric screwdriver (6-14) for tightening the screw (104) to the nut (102) on the back of the base body (101).

2. The automatic assembly machine for fire alarm bases according to claim 1, characterized in that: The base loading device (2) includes a lower frame (21), and a pushing and storing mechanism (22), a discharging mechanism (23), and a direction adjustment mechanism (24) respectively disposed on the lower frame (21). The discharging mechanism (23) is disposed on one side of the pushing and storing mechanism (22) and is used to receive stacks of base bodies (101) conveyed by the pushing and storing mechanism (22). The direction adjustment mechanism (24) includes a support platform (24-1), a pallet assembly (24-2), a discharging track (24-3), a lifting cylinder (24-4), and a servo motor (24-5). The discharging mechanism (23) is connected to the discharging track (24-3) and is used to convey stacks of base bodies (101) one by one to the discharging track (24-3). A support platform (24-1) is provided above the other end. The support platform (24-1) has a through hole through which the base body (101) can pass. The pallet assembly (24-2) is provided on the support platform (24-1) and is used to place the base body (101) on the pallet assembly (24-2) after the base body (101) passes through the through hole of the support platform (24-1) so that the base transfer device (3) can grab and transfer the base body (101). The servo motor (24-5) is installed on the drive end of the lifting cylinder (24-4) and can be driven by the lifting cylinder (24-4) to move the servo motor (24-5) from the lower end of the discharge track (24-3) to the upper part of the support platform (24-1) to drive the base body (101) to rotate and change direction.

3. The automatic assembly machine for fire alarm bases according to claim 1, characterized in that: The base transfer device (3) further includes a longitudinal transfer mechanism (31) and a transverse transfer mechanism (32) for driving the movement of each gripper mechanism (33). The longitudinal transfer mechanism (31) is provided in at least two sets at intervals along the transfer direction of the base body (101). Each set of the longitudinal transfer mechanism (31) includes a fixed seat (31-1), a longitudinal transfer slide (31-2), a longitudinal transfer drive cylinder (31-3), and a lifting cylinder (31-4). The fixed seat (31-1) is fixedly installed on the frame (1). The longitudinal transfer slide (31-2) is slidably disposed on the fixed seat (31-1) along the transfer direction perpendicular to the base body (101). The longitudinal transfer drive cylinder (31-3) is installed on the fixed seat (31-1), and the drive end of the longitudinal transfer drive cylinder (31-3) is connected to the longitudinal transfer slide (31-4). The lifting cylinder (31-4) is connected to the longitudinal sliding block (31-2). The transverse mechanism (32) includes a lifting platform (32-1), a transverse driving cylinder (32-2), and a transverse sliding rod (32-3). The lifting platform (32-1) is fixedly installed on the driving end of the lifting cylinder (31-4) of each group of longitudinal mechanisms (31). The transverse sliding rod (32-3) is slidably installed on the lifting platform (32-1) along the flow direction of the base body (101). The transverse driving cylinder (32-2) is installed on the lifting platform (32-1), and the driving end of the transverse driving cylinder (32-2) is connected to the transverse sliding rod (32-3). Each group of gripper mechanisms (33) is installed on the transverse sliding rod (32-3) at equal intervals.

4. The automatic assembly machine for fire alarm bases according to claim 1, characterized in that: In the nut pressing device (4), the nut feeding mechanism further includes a nut vibratory plate (4-1) and a nut conveying slide (4-2). The nut vibratory plate (4-1) is connected to the nut positioning seat (4-3) through the nut conveying slide (4-2). The nut gripping and pressing mechanism further includes a nut pressing bracket (4-4), a lifting seat plate (4-5), a pressing cylinder (4-6), and a slide side-shifting cylinder (4-8). The lifting seat plate (4-5) is slidably mounted on the upper part of the nut pressing bracket (4-4) through a guide post (4-5a). The pressing cylinder (4-6) is mounted on the top of the nut pressing bracket (4-4) and connected to the lifting seat plate (4-5). The nut gripping and pressing mechanism further includes a nut pressing bracket (4-4), a lifting seat plate (4-5), a pressing cylinder (4-6), and a slide side-shifting cylinder (4-8). The slide block (4-7) is horizontally slidably installed on the lower part of the lifting seat plate (4-5). The slide block side-shifting cylinder (4-8) is installed on one side of the lifting seat plate (4-5) and connected to the nut gripping slide block (4-7). The lower side of the nut gripping slide block (4-7) is also provided with a nut gripping pressure pin (4-7a). The nut pressing and positioning mechanism also includes a nut pressing seat (4-9) and a first rotating motor (4-11). The first rotating positioning seat (4-10) is rotatably installed on the nut pressing seat (4-9). The first rotating motor (4-11) is drivenly connected to the first rotating positioning seat (4-10) and is used to drive the first rotating positioning seat (4-10) to rotate to switch the assembly position.

5. The automatic assembly machine for fire alarm bases according to claim 1, characterized in that: In the terminal mounting device (5), the terminal feeding mechanism further includes a terminal vibratory feeder (5-1) and a terminal conveying slide (5-2). The terminal vibratory feeder (5-1) is connected to the terminal positioning seat (5-3) through the terminal conveying slide (5-2). The terminal gripping mechanism further includes a terminal gripping fixing plate (5-6), a side-shifting slide plate (5-7), a side-shifting drive cylinder (5-8), and a lifting gripping cylinder (5-10). The side-shifting slide plate (5-7) is horizontally slidably mounted on the terminal gripping fixing plate (5-6). The side-shifting drive cylinder (5-8) is mounted on one side of the terminal gripping fixing plate (5-6) and connected to the side-shifting slide plate (5-7). The terminal gripping mechanism... The plate (5-9) is slidably mounted on the side-moving slide plate (5-7). The lifting gripping cylinder (5-10) is mounted on the upper part of the side-moving slide plate (5-7) and connected to the terminal gripping plate (5-9). The lower side of the terminal gripping plate (5-9) is also provided with a terminal gripping head (5-9a). The terminal mounting and positioning mechanism also includes a terminal mounting seat (5-11) and a second rotating motor (5-13). The second rotating positioning seat (5-12) is rotatably mounted on the terminal mounting seat (5-11). The second rotating motor (5-13) is connected to the second rotating positioning seat (5-12) for driving the second rotating positioning seat (5-12) to rotate to switch the assembly position.

6. The automatic assembly machine for fire alarm bases according to claim 5, characterized in that: The terminal positioning seat (5-3) has a terminal positioning groove. The terminal positioning seat (5-3) is mounted on the terminal steering cylinder (5-4). The terminal steering cylinder (5-4) drives the terminal positioning seat (5-3) to rotate to change the installation direction of the conductive terminal (103). The terminal positioning seat (5-3) is also provided with a positioning protrusion (5-3a) and a stop block that positions and cooperates with the positioning protrusion (5-3a) on one side. The terminal steering cylinder (5-4) is mounted on the drive end of the retraction cylinder (5-5). The retraction cylinder (5-5) drives the terminal positioning seat (5-3) to move along the conveying direction of the terminal conveying slide (5-2).

7. The automatic assembly machine for fire alarm bases according to claim 1, characterized in that: In the screw tightening device (6), the screw feeding mechanism further includes a screw vibratory plate (6-1) and a screw conveying slide (6-2). The screw vibratory plate (6-1) is connected to the screw positioning seat (6-3) through the screw conveying slide (6-2). The screw gripping mechanism further includes a screw gripping fixing plate (6-4), a sliding plate (6-5), a sliding drive cylinder (6-6), and a screw gripping cylinder (6-7). The sliding plate (6-5) is horizontally mounted on the screw gripping fixing plate (6-4). The sliding drive cylinder (6-6) is mounted on one side of the screw gripping fixing plate (6-4) and connected to the sliding plate (6-5). The screw gripping cylinder (6-7) is fixed on the sliding plate (6-5). The screw gripping block (6-9) is connected to the drive end of the screw gripping cylinder (6-7) through a mounting plate (6-8). The screw tightening machine The structure also includes a horizontal plate (6-10), a lifting slide (6-11), and a screw-lifting cylinder (6-12). The lifting slide (6-11) is slidably mounted on the horizontal plate (6-10). The screw-lifting cylinder (6-12) is mounted on the upper part of the horizontal plate (6-10) and connected to the lifting slide (6-11) via a guide rod. The guide rod is provided with a preload spring (6-13) for keeping the lifting slide (6-11) in a depressed state. The electric screwdriver (6-14) is mounted on the lifting slide (6-11). The screw-tightening positioning mechanism also includes a screw-tightening seat (6-15) and a third rotary motor (6-16). The third rotary positioning seat is rotatably mounted on the screw-tightening seat (6-15). The third rotary motor (6-16) is drivenly connected to the third rotary positioning seat and is used to drive the third rotary positioning seat to rotate to switch the assembly position.

8. The automatic assembly machine for fire alarm bases according to any one of claims 1 to 7, characterized in that: After the screw-tightening station, there is a testing station, where a testing device (7) is installed on the frame (1).

9. The automatic assembly machine for fire alarm bases according to claim 8, characterized in that: The detection device (7) includes a detection base (7-1), a floating positioning plate (7-2), a central guide block (7-3), a probe (7-4), a pressing cylinder (7-5), a pressure plate (7-6), an elastic support block (7-7), and a buffer spring (7-8). The central guide block (7-3) is mounted on the detection base (7-1), the floating positioning plate (7-2) is guided and positioned on the central guide block (7-3), and the elastic support block (7-7) is positioned on the detection base (7-1). Between 7-1) and the floating positioning plate (7-2), the probe (7-4) is vertically mounted on the detection fixing seat (7-1), the buffer spring (7-8) acts on the probe (7-4) to keep the probe (7-4) in an upward elastic trend, and the upper end of the probe (7-4) passes through the floating positioning plate (7-2); the pressing cylinder (7-5) is fixedly mounted above the floating positioning plate (7-2), and the pressure plate (7-6) is mounted on the driving end of the pressing cylinder (7-5).

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