Automatic pressing and riveting device for spring bolt assembly

Abstract

The utility model relates to an automatic rivet pressing device for a spring bolt assembly. The rivet pressing machine comprises a tool jig and a rivet pressing unit, the rivet pressing unit is composed of a vibration disc, a feeding pipe, a first sliding table air cylinder, a rivet clamping hand and a rivet pressing air cylinder, a cylinder rod of the rivet pressing air cylinder is fixedly provided with an ejector rod, the ejector rod is located on the upper side of the tool jig and right faces a rivet hole in a spring bolt assembly, and a pipeline capable of allowing rivets to circulate is communicated between the discharging end of the vibration disc and the feeding pipe. The rivet clamping hand can be driven by the first sliding table air cylinder to move between the lower portion of the feeding pipe and the lower portion of the rivet pressing air cylinder in a reciprocating mode, the rivet clamping hand can clamp rivets falling from the feeding pipe, and the rivet pressing air cylinder can press the rivets on the rivet clamping hand into workpieces in the tool jig under the rivet pressing air cylinder. According to the automatic rivet pressing machine, rivets can be automatically supplied, workpieces can be automatically pressed and riveted, a large amount of labor cost is saved, the production precision and the yield are improved, and meanwhile the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a lock manufacturing equipment, and more particularly to an automatic riveting device for a lock tongue assembly. Background Technology

[0002] The lock on the security door has a retractable bolt 1, and a pull rod 2 is fixedly connected to the inner end of the bolt (see attached). Figure 5 The position of the lever is controlled by the mechanical mechanism inside the lock, and the state of the bolt is switched by pushing and pulling the lever. The bolt and lever are generally fixed together by a plug-in joint, with rivets driven into the plug joint. In the current lock manufacturing industry, the traditional processing method for the riveting process after the bolt and lever are plugged in is: drilling holes in the bolt and lever assembly using a bench drill, manually placing the rivets, and then pressing the rivets with a punch press. This processing method has drawbacks such as low processing efficiency, many steps, high labor costs, poor drilling accuracy, and high operational safety risks. Summary of the Invention

[0003] This utility model provides an automatic riveting device for a latch assembly; it solves the problems of low processing efficiency, high labor costs, poor drilling accuracy, and high operational safety risks in the existing riveting process of the latch and pull rod.

[0004] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: an automatic riveting device for a latch assembly, comprising: a tooling fixture and a riveting machine unit, wherein the tooling fixture is used to clamp and fix the assembly of the latch and the pull rod, the latch and pull rod assembly needs to have rivet holes pre-drilled, and ensure that the rivet holes are vertically upward; the riveting machine unit consists of a vibratory plate, a vertically arranged feed pipe, a horizontally arranged first slide cylinder, a rivet gripper, and a vertically downward arranged riveting cylinder, wherein the cylinder rod of the riveting cylinder A top rod is fixed on the upper side of the tooling fixture and is directly opposite the rivet hole on the locking tongue assembly. The discharge end of the vibratory feeder is connected to the feed pipe through a pipe that allows rivets to flow through. The rivet gripper can reciprocate between the lower part of the feed pipe and the lower part of the riveting cylinder under the drive of the first slide cylinder. The rivet gripper can clamp the rivets falling from the feed pipe. The riveting cylinder can press the rivets on the rivet gripper into the workpiece in the tooling fixture directly below.

[0005] The operating principle of this utility model is as follows: the vibratory feeder can continuously supply rivets to the feed pipe through the pipeline. When the first slide cylinder pushes the rivet clamp to move below the feed pipe, the rivets falling from the feed pipe can be caught by the rivet clamp. Then the rivet clamp can transfer the rivets to the upper part of the tooling fixture, so that the rivets are aligned with the rivet holes on the workpiece. Then the pressing cylinder located above pushes the top rod to descend, which can press the rivets on the rivet clamp into the workpiece. After the riveting is completed, the pressing cylinder and the first slide cylinder reset one after the other, and the next action is repeated.

[0006] Furthermore, the rivet clamp includes a base plate, a first clamping plate, and a second clamping plate fixed on the slide of the first slide cylinder. The upper surfaces of the three are set at the same height. The two clamping plates are vertically rotatably connected to the base plate. The base plate is provided with an elastic element that can drive the two clamping plates to approach each other, so that the base plate and the two clamping plates can be tightly spliced ​​together. A clamping hole for clamping rivets is formed on the splice seam of the two clamping plates. In normal operation, the rivet clamp is in a clamped state, with its upper surface flat and its height close to the lower opening of the feed tube. When the first slide cylinder drives the clamping hole on the rivet clamp to align with the feed tube, the rivet will automatically fall and get stuck in the clamping hole. Then, the first slide cylinder pushes the clamping hole to move directly below the riveting cylinder. During the movement, the upper surface of the base plate is close to the lower end of the feed tube throughout the process to prevent the rivet inside the feed tube from falling further. During the pressing of the riveting cylinder, the rivet and the push rod will generate outward force on the side wall of the clamping hole, that is, the first clamping plate and the second clamping plate, thereby pushing the two clamping plates to adaptively flip outward until the rivet is completely disengaged. After the riveting cylinder resets, the elastic element will push the two clamping plates to clamp and reset.

[0007] Furthermore, both the first and second clamping plates are provided in pairs, stacked vertically on the same pivot axis. This arrangement ensures that during the rivet pressing down, the two clamping plates on the upper side separate first, while the two clamping plates on the lower side remain clamped, providing a certain clamping, positioning, and guiding effect for the rivet.

[0008] Furthermore, the tooling fixture comprises a fixed base, a clamping block, a contact block, and two horizontally extending connecting rods within the fixed base. The clamping block and the contact block are fixed to the two ends of the connecting rods. A return spring is provided between the contact block and the fixed base, and the fixed base has a workpiece positioning groove. When the return spring is compressed, the clamping block moves away from the workpiece positioning groove, thus the tooling fixture is in a relaxed state, and the workpiece can freely enter and exit the workpiece positioning groove. Conversely, when the return spring is released, the clamping block tends to move closer to the workpiece positioning groove and exerts a clamping effect on the workpiece within the workpiece positioning groove, thus the tooling fixture is in a tightened state.

[0009] Therefore, this utility model has the following characteristics compared with the prior art: 1. This utility model can automatically supply rivets and press-fit workpieces, saving a lot of labor costs, improving production accuracy and yield, and improving production efficiency. Attached Figure Description

[0010] Appendix Figure 1 This is a structural schematic diagram of the riveting machine unit;

[0011] Appendix Figure 2 This is a schematic diagram of the riveting machine unit after some of the baffles have been removed;

[0012] Appendix Figure 3 This is a partial view of the riveting machine unit;

[0013] Appendix Figure 4 These are two diagrams showing the states where a rivet can clamp onto a hand;

[0014] Appendix Figure 5 This is a structural diagram of the tooling fixture. Detailed Implementation

[0015] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0017] Example 1: See Figure 1 , Figure 2 and Figure 5An automatic riveting device for a latch assembly includes: a tooling fixture 200 and a riveting machine unit 100. The tooling fixture is used to clamp and fix the assembly of the latch 1 and the pull rod 2. The latch and pull rod assembly needs to have rivet holes pre-drilled, ensuring that the rivet holes are vertically upward. The riveting machine unit consists of a vibratory feeder, a base 110, a vertically arranged feed pipe 120, a horizontally arranged first slide cylinder 130, a rivet gripper 140, and a vertically downward-facing riveting cylinder 150. The base is equipped with a positioning plate 111 for fixing the feed pipe, and the first slide cylinder and the riveting machine unit are connected. All riveting cylinders are fixed on the base. The riveting cylinder is specifically a booster cylinder. A push rod 151 is fixed on the cylinder rod of the riveting cylinder. The push rod is located on the upper side of the tooling fixture and is directly opposite the rivet hole on the locking tongue assembly. A pipe 160 for rivets to flow through is connected between the discharge end of the vibratory plate and the feed pipe. The rivet gripper can move back and forth between the lower part of the feed pipe and the lower part of the riveting cylinder under the drive of the first slide cylinder. The rivet gripper can clamp the rivets falling from the feed pipe. The riveting cylinder can press the rivets on the rivet gripper into the workpiece in the tooling fixture directly below.

[0018] The operating principle of this embodiment is as follows: the vibratory feeder can continuously supply rivets to the feed pipe through the pipeline. The vibratory feeder is a mature existing technology, and its automatic sorting and feeding principle and specific structure will not be described in detail here. When the first slide cylinder pushes the rivet clamp to move below the feed pipe, the rivets falling from the feed pipe can be caught by the rivet clamp. Then the rivet clamp can transfer the rivets to the upper part of the tooling fixture, so that the rivets are aligned with the rivet holes on the workpiece. Then the pressing cylinder located above pushes the top rod to descend, which can press the rivets on the rivet clamp into the workpiece. After the riveting is completed, the pressing cylinder and the first slide cylinder reset one after the other, and the next action is repeated.

[0019] See Figure 4 The rivet clamp includes a base plate 141, a first clamping plate 142, and a second clamping plate 143 fixed on the slide of the first slide cylinder. The upper surfaces of the three are set at the same height. The two clamping plates are vertically rotatably connected to the base plate. Torsion springs are provided at the two rotation shafts to drive the two clamping plates to approach each other, so that the base plate and the two clamping plates can be tightly spliced ​​together. A clamping hole 144 for clamping rivets is formed on the splice seam of the two clamping plates. In normal operation, the rivet clamp is in a clamped state, with its upper surface flat and its height close to the lower opening of the feed tube. When the first slide cylinder aligns the clamping hole on the rivet clamp with the feed tube, the rivet automatically falls and gets stuck in the clamping hole. Then, the first slide cylinder pushes the clamping hole to move directly below the riveting cylinder. During this movement, the upper surface of the base plate remains close to the lower end of the feed tube to prevent the rivet inside the feed tube from falling further. During the downward pressing of the riveting cylinder, the rivet and the push rod exert outward force on the sidewalls of the clamping hole, i.e., the first and second clamping plates, thereby pushing the two clamping plates to adaptively flip outward (see Appendix). Figure 3(Continue until the rivet is completely dislodged. After the riveting cylinder resets, the elastic element will push the two clamping plates to clamp and reset.)

[0020] See Figure 3 The first and second clamping plates each have two pieces, which are stacked vertically on the same axis of rotation. This arrangement ensures that during the rivet pressing down, the two clamping plates on the upper side separate first, while the two clamping plates on the lower side remain clamped, providing a certain clamping, positioning, and guiding effect for the rivet.

[0021] See Figure 1 The piston rod of the riveting cylinder is connected to a mounting base 152 for fixing the push rod. A proximity sensor 153 is provided on the side of the mounting base. The proximity sensor is used to detect the status of the mounting base. If the mounting base falls off, the proximity sensor will sound an alarm.

[0022] See Figure 4 The substrate has an extension plate 145 extending towards one side of the clamping hole, and the extension plate is at the same height as the upper surface of the substrate. The main function of the extension plate is to fix the clamping position of the two clamping plates, because the two clamping plates will abut against the sides of the extension plate when clamped.

[0023] See Figure 5 The fixture 200 comprises a fixed base 210, a clamping block 220, a contact block 230, and two horizontally extending connecting rods 240 within the fixed base. The clamping block and the contact block are fixed to the two ends of the connecting rods. A return spring 250 is provided between the contact block and the fixed base. The fixed base has a workpiece positioning groove 260. When the return spring is compressed, the clamping block moves away from the workpiece positioning groove, thus the fixture is in a relaxed state, and the workpiece can freely enter and exit the workpiece positioning groove. Conversely, when the return spring is released, the clamping block tends to move closer to the workpiece positioning groove and exerts a clamping effect on the workpiece within the workpiece positioning groove, thus the fixture is in a tightened state.

[0024] See Figure 2 The first slide cylinder includes a cylinder body 131, a slide 132, an inner limit block 133, and an outer limit block 134.

[0025] This invention can be modified in many ways, as will be apparent to those skilled in the art, and such modifications are not considered to depart from the scope of this invention. All such modifications that are obvious to those skilled in the art are included within the scope of these claims.

Claims

1. An automatic riveting device for a latch assembly, characterized in that, include: The tooling fixture and riveting machine unit consist of a vibratory feeder, a vertically arranged feed pipe, a horizontally arranged first slide cylinder, a rivet gripper, and a vertically downward-facing riveting cylinder. A push rod is fixed on the cylinder rod of the riveting cylinder. The push rod is located on the upper side of the tooling fixture and is directly opposite the rivet hole on the locking tongue assembly. A pipe for rivets to flow through is connected between the discharge end of the vibratory feeder and the feed pipe. The rivet gripper can reciprocate between the lower part of the feed pipe and the lower part of the riveting cylinder under the drive of the first slide cylinder. The rivet gripper can clamp the rivets falling from the feed pipe. The riveting cylinder can press the rivets on the rivet gripper into the workpiece in the tooling fixture directly below.

2. The automatic riveting device for the latch assembly according to claim 1, characterized in that: The rivet clamp includes a base plate, a first clamping plate, and a second clamping plate fixed on the slide of the first slide cylinder. The upper surfaces of the three are set at the same height. The two clamping plates are vertically rotatably connected to the base plate. The base plate is provided with an elastic element that can drive the two clamping plates to approach each other, so that the base plate and the two clamping plates can be tightly spliced ​​together. A clamping hole for clamping rivets is formed on the splice seam of the two clamping plates.

3. The automatic riveting device for the latch assembly according to claim 2, characterized in that: Both the first clamping plate and the second clamping plate are provided in pairs, and are stacked vertically on the same axis of rotation.

4. The automatic riveting device for the latch assembly according to claim 1, characterized in that: The end of the cylinder rod of the riveting cylinder is connected to a mounting base for fixing the push rod, and a proximity sensor is provided on the side of the mounting base.

5. The automatic riveting device for the latch assembly according to claim 2, characterized in that: The substrate has an extension plate extending toward one side of the clamping hole, and the extension plate is at the same height as the upper surface of the substrate.

6. The automatic riveting device for the latch assembly according to claim 1, characterized in that: The tooling fixture comprises a fixed base, a clamping block, a contact block, and two horizontal connecting rods passing through the fixed base. The clamping block and the contact block are fixed to the two ends of the connecting rods. A return spring is provided between the contact block and the fixed base. The fixed base is provided with a workpiece positioning groove.

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