A jewelry chain cutting machine

Abstract

The utility model discloses a jewelry chain cutting machine, including frame, frame is equipped with the bearing mechanism for bearing the jewelry chain of cutting, frame is fixed with the fixed knife, and the fixed knife is equipped with first cutting part, and first cutting part includes first straight part and first inclined part, and the frame is equipped with the drive mechanism that can reciprocating linear motion of output end, and the output end of drive mechanism is equipped with the moving knife, and the moving knife is equipped with second cutting part, and second cutting part includes second straight part and second inclined part, and the frame is fixed with the guide frame, and the guide frame is equipped with the material guiding hole that passes through up and down, and the frame is equipped with the feeding mechanism of material guiding hole feeding, and the output end of drive mechanism is equipped with the elastic strip. The elastic strip is contacted with the jewelry chain from the material guiding hole first relative to the moving knife, and the elastic strip cooperates with first inclined part and makes part jewelry chain bend, and then the jewelry chain below first straight part moves to the decoration body and leans on first straight part, and first straight part and second straight part can align the chain body and cut the chain body.

Description

Technical Field

[0001] This utility model relates to the technical field of jewelry chain processing devices, specifically to a jewelry chain cutting machine. Background Technology

[0002] Jewelry chains, including bracelets worn on the wrist and necklaces worn around the neck, satisfy people's feelings and pursuit of beauty. Among jewelry chains, beaded chains and wave chains have become increasingly popular styles in recent years. Structurally, beaded chains and wave chains are largely similar, including a chain body and decorative elements strung on the chain body, with several decorative elements arranged at intervals. The inventor discovered that in the production of beaded chains and wave chains, longer jewelry chains need to be cut into shorter chains according to a preset length requirement. Manual cutting is time-consuming and labor-intensive; if automatic cutting equipment is used, if the spacing between adjacent decorative elements on the entire chain is slightly different, the cutting blade of the equipment may cut into the decorative elements, requiring the jewelry chain to be reworked. There is an urgent need for a jewelry chain cutting machine that can prevent decorative elements from being cut and ensure that the chain body is not cut. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a jewelry chain cutting machine that can prevent the decorative part from being cut off and ensure that the chain is cut off.

[0004] To solve the above-mentioned technical problems, this utility model includes a frame, which is provided with a support mechanism for supporting the jewelry chain to be cut. Its structural features are as follows: the frame is fixedly equipped with a fixed blade, which has a first cutting section. The first cutting section includes a first straight section and a first inclined section located above the first straight section. The first straight section and the first inclined section have an acute-angled inner angle. The frame is provided with a drive mechanism whose output end can perform reciprocating linear motion. The output end of the drive mechanism is equipped with a moving blade, which can move closer to and away from the fixed blade through the output end of the drive mechanism. The moving blade has a second cutting section, which includes a first... The machine frame has two straight sections and a second inclined section located below the second straight section. The second straight section and the second inclined section have an acute-angled inner angle. The frame is fixed with a guide frame, which has a through guide hole. The guide hole is located between the first cutting section and the second cutting section in the moving direction of the output end of the drive mechanism. The frame is equipped with a feeding mechanism that can transport the jewelry chain on the carrying mechanism toward the guide hole. The output end of the drive mechanism is equipped with an elastic strip for contacting the jewelry chain and bringing the jewelry chain closer to the first inclined section. The elastic strip is located between the guide hole and the second cutting section in the moving direction of the output end of the drive mechanism.

[0005] With the above structure, the feeding mechanism conveys the jewelry chain to be cut from top to bottom through the guide hole, ensuring the accuracy of the chain's position. After conveying a preset length of jewelry chain through the guide hole, the chain remains suspended. The drive mechanism actuates the output end, causing the elastic bar and moving blade on the output end to move towards the guide hole and fixed blade. The elastic bar first contacts the chain, moving against it. Part of the chain gradually approaches the first cutting section. Under the obstruction of the first cutting section and the elastic pressure from the elastic bar, the suspended chain changes its posture, gradually moving closer to the first inclined section. The chain near the cutting point undergoes vertical displacement. The junction of the first straight section and the first inclined section abuts against the chain between the decorative element above and below the cutting point. The first straight section of the fixed blade abuts against the decorative element below the cutting point, preventing it from excessively shifting upwards. As the elastic bar and the moving blade continue to move, the elastic bar prevents pressure deformation on the jewelry chain and avoids damage to itself through its own elastic deformation function. The second straight part of the moving blade cooperates with the first straight part of the fixed blade to cut the chain. When the first straight part abuts against the decorative part below the cut point of the jewelry chain, as the second straight part approaches the first straight part, the second inclined part abuts against the decorative part located below the cut point of the jewelry chain and, through its own shape, slightly lowers the decorative part and the jewelry chain below the elastic bar. That is, the movement of the second inclined part overcomes the elastic force of the elastic bar, thereby slightly changing the posture of the jewelry chain held against by the elastic bar, ensuring that the second and first straight parts cut on the chain and not on the decorative part.

[0006] Furthermore, the drive mechanism includes a first motor mounted on a frame. A bearing is eccentrically mounted on the output end of the first motor. A sliding frame, serving as the output end, is slidably connected to the frame. The sliding frame has an elongated hole for contacting the outer surface of the bearing. There are clearance intervals on both sides of the elongated hole to the outer surface of the bearing. These clearance intervals are used to prevent the bearing from moving horizontally in the left-right direction when it eccentrically swings relative to the output end of the first motor. By setting up the drive mechanism, the first motor drives the bearing eccentrically mounted on its output end to swing around the axis of the first motor's output end. When the bearing swings, it abuts against the elongated hole, causing the sliding frame, serving as the output end, to reciprocate linearly in the front-back direction. This allows the moving blade and elastic strip to move closer to and further away from the fixed blade and the jewelry chain from the guide hole in the front-back linear direction.

[0007] Furthermore, the feeding mechanism includes a second motor mounted on a frame. The frame is rotatably connected to a first rotating shaft and a second rotating shaft. The second motor is driven and connected to the first rotating shaft. The first rotating shaft is equipped with a feeding wheel, and the outer surface of the feeding wheel is circumferentially provided with several protrusions. A stop gap is formed between two circumferentially adjacent protrusions to accommodate a single decorative object. The second rotating shaft is equipped with an abutment wheel, which prevents the decorative object from dislodging from the stop gap when the feeding wheel rotates. By setting up the feeding mechanism, the second motor drives the first rotating shaft to rotate, and the feeding wheel on the first rotating shaft rotates along with the first rotating shaft. Two circumferentially adjacent protrusions can accommodate a single decorative object. The abutment wheel also rotates when in contact with the moving decorative object, reducing wear on the decorative object. The abutment wheel prevents a single decorative object from falling out of the stop gap. The feeding wheel and the abutment wheel cooperate to complete the directional feeding of the jewelry chain.

[0008] Furthermore, the frame is equipped with a collection box for collecting the jewelry chains after they have been cut by the fixed and moving blades. By setting up the collection box, the cut jewelry chains can be collected in a targeted manner, ensuring a clean working environment and reducing the collection workload for the workers.

[0009] Furthermore, the frame is equipped with a clamping mechanism capable of holding the jewelry chain from the feeding wheel and the abutment wheel. The frame is also equipped with a support roller. The clamping mechanism can hold the jewelry chain before it is cut and place the cut jewelry chain on the support roller. By setting up the clamping mechanism and the support roller, when the cut jewelry chain is long, the clamping mechanism holds the jewelry chain as material before cutting. The cut jewelry chain can remain in the clamping state, and then the clamping mechanism places the cut, longer jewelry chain on the support roller. This prevents several long jewelry chains from piling up together and getting tangled, making it difficult for operators to separate them one by one, thus improving the convenience of the overall operation.

[0010] Furthermore, the clamping mechanism includes two upper arms hinged to the frame, and a third rotating shaft rotatably connected to the lower part of the two arms. The third rotating shaft is fixedly mounted on a mounting base, and the mounting base is equipped with pneumatic fingers. The pneumatic fingers have a first clamping end and a second clamping end that can move closer to and further away from each other. The first clamping end and the second clamping end are each equipped with a clamping fixture. The clamping fixture includes a fixture frame, and the fixture frame is equipped with two clamping blocks arranged vertically at intervals. The clamping fixtures on the first clamping end and the second clamping end are symmetrically arranged. The frame is equipped with a first drive assembly for driving the arms to swing so that the pneumatic fingers approach the bearing roller. The frame is equipped with a posture adjustment assembly, which can drive the third rotating shaft to rotate so that the front and rear ends of the jewelry chain clamped by the clamping fixture are located on the front and rear sides of the bearing roller, respectively. The frame is equipped with a second drive assembly for driving the bearing roller to approach and move away from the third rotating shaft along its own axial direction. By setting up a clamping mechanism, after the feeding wheel and the abutment wheel convey the jewelry chain as material from top to bottom, the two clamping fixtures on the pneumatic fingers can clamp the jewelry chain from opposite sides, ensuring the stability of the clamping. The pneumatic fingers and clamping fixtures can also clamp the jewelry chain at two points in the vertical direction. After the jewelry chain is cut, the first drive component drives the support arm to swing, the third rotating shaft and the clamping fixtures move closer to the carrier roller, and the attitude adjustment component drives the third rotating shaft to rotate. The attitude of the pneumatic fingers, clamping fixtures and the jewelry chain being clamped changes. The front and rear ends of the jewelry chain being clamped are located on the front and rear sides of the carrier roller, respectively, and the jewelry chain is in an inverted U-shape and located above the carrier roller. Finally, the pneumatic fingers move the first clamping end and the second clamping end away from each other, thereby releasing the jewelry chain, which can fall smoothly onto the carrier roller. By setting a second drive component, the second drive component moves the carrier roller away from the pneumatic fingers and clamping fixture on the third rotating shaft before the third rotating shaft approaches the carrier roller. After the pneumatic fingers and clamping fixture move into place, the second drive component drives the carrier roller to approach the pneumatic fingers and clamping fixture. This ensures that the carrier roller and the pneumatic fingers and clamping fixture have a small vertical distance, thereby ensuring that the carrier roller reliably supports the falling jewelry chain and preventing interference between the carrier roller and the pneumatic fingers and clamping fixture.

[0011] Furthermore, the attitude adjustment assembly includes a pull rod hinged to the upper part of the frame, and a cross arm hinged to the lower part of the pull rod. The side of the cross arm away from the pull rod is fixed to a third rotating shaft. The pull rod can pull the cross arm upward when the third rotating shaft approaches the support roller. By setting the attitude adjustment assembly, when the first drive assembly drives the support arm to swing, the pull rod pulls the cross arm upward, thereby rotating the third rotating shaft. This adjusts the attitude of the pneumatic fingers and the clamping fixture, so that the jewelry chain clamped by the clamping fixture is in an inverted U-shape, and the jewelry chain has an attitude that can stably overlap the support roller.

[0012] Furthermore, a baffle is hinged to the side of the frame near the bearing roller. The frame is equipped with a micro switch that can contact the downward-falling baffle. The micro switch is connected to the first drive assembly and the second drive assembly. By setting up the baffle and the micro switch, when several cut jewelry chains are loaded on the bearing roller, the operator flips the baffle and manually removes the jewelry chains from the bearing roller. After the operator flips the baffle, the baffle disengages from the micro switch, and the first drive assembly and the second drive assembly stop operating, ensuring the personal safety of the operator when removing the jewelry chains from the bearing roller. The cut jewelry chains temporarily fall freely.

[0013] In summary, this utility model has the advantages of reasonable structure and convenient use. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 yes Figure 1 Enlarged view of a portion of area A in the middle;

[0016] Figure 3 yes Figure 1 Enlarged view of a section in area B;

[0017] Figure 4 This is a top view of the structure of this utility model;

[0018] Figure 5 yes Figure 4 A schematic diagram of the structure after being viewed in section along line CC and rotated 90 degrees clockwise;

[0019] Figure 6 yes Figure 5 A magnified view of a section in area D;

[0020] Figure 7 yes Figure 6 A magnified view of a section in area E;

[0021] Figure 8 It is a structural schematic diagram of part of the frame, fixed tool, bearing, sliding frame, moving tool, guide frame and elastic strip;

[0022] Figure 9 This is a three-dimensional structural diagram of the feeding wheel;

[0023] Figure 10 yes Figure 9 Enlarged view of a section in the F region;

[0024] Figure 11 This is a three-dimensional structural diagram of the elastic strip;

[0025] Figure 12It is a three-dimensional structural diagram of the fixed tool, part of the sliding frame, and the moving tool;

[0026] Figure 13 This is a top view of the structure of part of the frame, clamping mechanism, and bearing roller;

[0027] Figure 14 It is a three-dimensional structural diagram of part of the frame, support arm, third rotating shaft, mounting base, pneumatic fingers, clamping fixture, and attitude adjustment components;

[0028] Figure 15 It is a three-dimensional structural diagram of the pneumatic fingers and clamping fixture;

[0029] Figure 16 It is a simplified diagram of the motion of the fixed blade, moving blade, guide frame, elastic strip, and jewelry chain in use.

[0030] Figure 17 It is a diagram showing the operational status of the outrigger, third pivot, pneumatic fingers, tie rod, cross arm, and load-bearing roller during use;

[0031] Figure 18 yes Figure 17 A magnified view of a section in the G region;

[0032] Figure 19 yes Figure 17 A magnified view of a portion of region H in the middle;

[0033] In the diagram: 1. Frame; 11. Carrying roller; 12. Baffle; 13. Micro switch; 2. Carrying mechanism; 3. Fixed blade; 31. First cutting section; 311. First straight section; 312. First inclined section; 4. Drive mechanism; 41. First motor; 42. Bearing; 43. Sliding frame; 431. Long slot; 5. Moving blade; 51. Second cutting section; 511. Second straight section; 512. Second inclined section; 6. Guide frame; 61. Guide hole; 7. Feeding mechanism; 71. Second motor 72. First rotating shaft; 73. Second rotating shaft; 74. Feeding wheel; 741. Protrusion; 75. Abutment wheel; 8. Elastic strip; 9. Collection box; 10. Clamping mechanism; 101. Support arm; 102. Third rotating shaft; 103. Mounting base; 104. Pneumatic finger; 105. Clamping fixture; 1051. Fixture frame; 1052. Clamping block; 106. First drive assembly; 107. Attitude adjustment assembly; 1071. Pull rod; 1072. Cross arm; 108. Second drive assembly. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention. For ease of understanding, Figure 1The top part is the top part of this utility model. Figure 1 The bottom part is the bottom part of this utility model. Figure 4 The top is the front side of the utility model. Figure 4 The bottom is the rear side of the utility model. Figure 4 The left side is the left side of the utility model. Figure 4 The right side is the right side of the utility model.

[0035] Reference Figures 1 to 8 , Figure 12 , Figure 16 This utility model includes a frame 1, which is equipped with a support mechanism 2 for carrying jewelry chains to be cut. The support mechanism 2 includes a motor mounted on the frame 1 and a rotating roller rotatably connected to the frame 1. The motor drives the rotating roller to rotate via a synchronous pulley and belt mechanism. After the jewelry chain is collected into a disc shape, it is inserted into the rotating roller. The rotation of the rotating roller causes the disc-shaped jewelry chain to rotate as well, preventing the jewelry chain from being torn during subsequent transport. The frame 1 is equipped with several feed sprockets rotatably connected to it. The feed sprockets have a smaller diameter in the middle and a larger diameter at both ends. The middle part of the feed sprockets provides support and guidance for the jewelry chain. Several feed sprockets are arranged in a group, and each group of feed sprockets is spaced apart on the frame 1 along the jewelry chain transport direction. The frame 1 is fixedly equipped with a fixed blade 3. The fixed blade 3 has a first cutting part 31. The first cutting part 31 includes a first straight part 311 and a first inclined part 312 located above the first straight part 311. The first straight part 311 and the first inclined part 312 have an acute-angled inner angle. The first cutting section 31 is generally pointed. The vertical distance between the first straight section 311 and the first inclined section 312 gradually increases from back to front. The fixed blade 3 is provided with a long through hole running vertically through the machine frame 1. A backing plate is provided below the fixed blade 3. The backing plate is provided with a threaded hole corresponding to the long through hole. The fixed blade 3 is fixed to the machine frame 1 by screws that pass through the machine frame 1, the long through hole and are screwed into the threaded hole.

[0036] Reference Figures 1 to 8 , Figure 12 and Figure 16The frame 1 is equipped with a drive mechanism 4 whose output end can perform reciprocating linear motion. The drive mechanism 4 includes a first motor 41 mounted on the frame 1. A bearing 42 is eccentrically mounted on the output end of the first motor 41. In this embodiment, the output end of the first motor 41 is provided with an eccentric sleeve, and the bearing 42 is eccentrically connected to the output end of the first motor 41 through the eccentric sleeve. The axis of the bearing 42 is spaced from the axis of the output end of the first motor 41. A sliding frame 43, which can slide back and forth and serves as the output end, is slidably mounted on the frame 1. The sliding frame 43 is provided with an elongated hole 431 for contacting the outer side of the bearing 42. There are clearance intervals on both sides of the elongated hole 431 to the outer side of the bearing 42. The clearance intervals are used to avoid the movement of the bearing 42 in the left and right horizontal direction when it swings eccentrically relative to the output end of the first motor 41. A moving blade 5 is provided at the output end of the drive mechanism 4. The moving blade 5 is mounted on the sliding frame 43, which serves as the output end of the drive mechanism 4. The moving blade 5 can move closer to and away from the fixed blade 3 through the output end of the drive mechanism 4. The movable blade 5 is provided with a second cutting section 51, which includes a second straight section 511 and a second inclined section 512 located below the second straight section 511. The second straight section 511 and the second inclined section 512 have an acute-angled inner angle. The second cutting section 51 cooperates with the first cutting section 31 to cut the jewelry chain. The second cutting section 51 is generally pointed. The vertical distance between the second straight section 511 and the second inclined section 512 gradually increases from front to back. The sliding frame 43 is provided with a clearance groove for avoiding the jewelry chain.

[0037] Reference Figures 1 to 12 and Figure 16 The frame 1 is fixedly equipped with a guide frame 6, which has a through guide hole 61. The guide hole 61 is located between the first cutting section 31 and the second cutting section 51 in the moving direction of the output end of the drive mechanism 4. The diameter of the upper part of the guide hole 61 gradually decreases from top to bottom, and the minimum diameter of the guide hole 61 is adapted to the outer diameter of the decorative body. The frame 1 is equipped with a feeding mechanism 7, which can convey the jewelry chain on the carrying mechanism 2 toward the guide hole 61. The output end of the drive mechanism 4 is equipped with an elastic strip 8 for contacting the jewelry chain and bringing the jewelry chain closer to the first inclined section 312. The elastic strip 8 is located between the guide hole 61 and the second cutting section 51 in the moving direction of the output end of the drive mechanism 4. The elastic strip 8 can be a commercially available industrial rubber ring or rubber strip. The elastic strip 8 contacts the jewelry chain from the guide hole 61 first relative to the second cutting section 51. The elastic strip 8 provides elastic pressure to the jewelry chain, which can reduce the pressure damage deformation of the jewelry chain. The first motor 41 drives the bearing 42, which is eccentrically mounted on the output end of the first motor 41, to swing around the axis of the output end of the first motor 41. When the bearing 42 swings, it abuts against the elongated hole 431, causing the sliding frame 43, which is the output end, to perform reciprocating linear motion in the front-back direction. As a result, the moving knife 5 and the elastic strip 8 can move closer to and further away from the fixed knife 3 and the jewelry chain from the guide hole 61 in the front-back linear direction.

[0038] Reference Figure 1 , Figure 2 , Figures 4 to 6 , Figure 9 , Figure 10 and Figure 16 The feeding mechanism 7 includes a second motor 71 mounted on a frame 1. The frame 1 is rotatably connected to a first rotating shaft 72 and a second rotating shaft 73. The second motor 71 drives the first rotating shaft 72. The first rotating shaft 72 is equipped with a feeding wheel 74. The outer surface of the feeding wheel 74 is circumferentially provided with several protrusions 741. A stop gap is formed between two circumferentially adjacent protrusions 741 to accommodate a single decorative object. The second rotating shaft 73 is equipped with an abutment wheel 75. The abutment wheel 75 prevents the decorative object from falling out of the stop gap when the feeding wheel 74 rotates. The second motor 71 drives the first rotating shaft 72 to rotate, and the feeding wheel 74 on the first rotating shaft 72 rotates with the first rotating shaft 72. Two circumferentially adjacent protrusions 741 can accommodate a single decorative object. The abutment wheel 75 also rotates when in contact with the moving decorative object, reducing the wear of the decorative object by the abutment wheel 75. The abutment wheel 75 prevents a single decorative object from falling out of the stop gap. The feeding wheel 74 and the abutment wheel 75 cooperate to complete the directional feeding of the jewelry chain. The frame 1 is equipped with a collection box 9 for collecting the jewelry chains after they have been cut by the fixed blade 3 and the moving blade 5. By setting up the collection box 9, the cut jewelry chains can be collected in a targeted manner, ensuring a clean working environment and reducing the collection workload for the operators.

[0039] Reference Figures 1 to 5 , Figures 13 to 15 , Figures 17 to 19 The frame 1 is equipped with a clamping mechanism 10 that can hold jewelry chains from the feeding wheel 74 and the abutment wheel 75. The frame 1 is also equipped with a carrying roller 11. The clamping mechanism 10 can hold the jewelry chain before it is cut and place the cut jewelry chain on the carrying roller 11. When the cut jewelry chain is long, the clamping mechanism 10 clamps the jewelry chain as material before cutting it. The cut jewelry chain can remain in the clamping state of the clamping mechanism 10. Then, the clamping mechanism 10 places the cut, longer jewelry chain on the carrying roller 11, preventing several long jewelry chains from piling up together and getting tangled, making it difficult for operators to separate them one by one, thus improving the convenience of the overall operation.

[0040] Reference Figures 1 to 5 , Figures 13 to 15 , Figures 17 to 19The clamping mechanism 10 includes two upper arms 101 hinged to the frame 1. The upper parts of the two arms 101 are hinged to the frame 1 together via a hinge shaft. The lower parts of the two arms 101 are rotatably connected to a third rotating shaft 102 via bearing seats. The third rotating shaft 102 is fixedly provided with a mounting base 103, and the mounting base 103 is provided with pneumatic fingers 104. The pneumatic fingers 104 have a first clamping end and a second clamping end that can move closer to and further away from each other. The first clamping end and the second clamping end are respectively provided with clamping fixtures 105. The clamping fixtures 105 include a fixture frame 1051, and the fixture frame 1051 is provided with two clamping blocks 1052 arranged vertically and vertically. The clamping fixtures 105 on the first clamping end and the second clamping end are symmetrically arranged. In this embodiment, the clamping fixtures 105 on the first clamping end and the second clamping end are symmetrically arranged from left to right. The frame 1 is equipped with a first drive assembly 106 for driving the support arm 101 to swing so that the pneumatic finger 104 approaches the support roller 11. The first drive assembly 106 is made of a cylinder, with the output end of the cylinder hinged to the middle of the support arm 101 and the side of the cylinder away from the output end hinged to the frame 1. The frame 1 is equipped with a posture adjustment assembly 107, which can drive the third rotating shaft 102 to rotate so that the front and rear ends of the jewelry chain held by the clamping fixture 105 are respectively located on the front and rear sides of the support roller 11 when it approaches the support roller 11. The frame 1 is equipped with a second drive assembly 108 that can drive the support roller 11 to approach and move away from the third rotating shaft 102 along its own axial direction. The second drive assembly 108 is made of a cylinder.

[0041] Reference Figures 17 to 19When the feeding wheel 74 and the abutment wheel 75 convey the jewelry chain as material from top to bottom, the two clamping fixtures 105 on the pneumatic finger 104 can clamp the jewelry chain from opposite sides, ensuring the stability of the clamping. The pneumatic finger 104 and the clamping fixtures 105 can also clamp the jewelry chain at two points in the vertical direction. After the jewelry chain is cut, the first drive assembly 106 drives the support arm 101 to swing, the third rotating shaft 102 and the clamping fixtures 105 approach the carrying roller 11, and the posture adjustment assembly 107 drives the third rotating shaft 102 to rotate. The posture of the pneumatic finger 104, the clamping fixtures 105 and the jewelry chain clamped by the clamping fixtures 105 change. The front and rear ends of the jewelry chain clamped by the clamping fixtures 105 are located on the front and rear sides of the carrying roller 11, respectively, and the jewelry chain is in an inverted U-shape and located above the carrying roller 11. Finally, the pneumatic fingers 104 move the first and second clamping ends away from each other, thus releasing the jewelry chain, allowing it to fall smoothly onto the support roller 11. By setting a second drive assembly 108, before the third rotating shaft 102 approaches the support roller 11, the second drive assembly 108 moves the support roller 11 away from the pneumatic fingers 104 and clamping fixture 105 on the third rotating shaft 102. After the pneumatic fingers 104 and clamping fixture 105 are in position, the second drive assembly 108 drives the support roller 11 to approach the pneumatic fingers 104 and clamping fixture 105, ensuring a small vertical distance between the support roller 11 and the pneumatic fingers 104 and clamping fixture 105, thus ensuring reliable support of the falling jewelry chain by the support roller 11 and preventing interference between the support roller 11 and the pneumatic fingers 104 and clamping fixture 105.

[0042] Reference Figures 1 to 5 , Figures 13 to 15 , Figures 17 to 19The attitude adjustment assembly 107 includes a pull rod 1071 hinged to the upper part of the frame 1, and a cross arm 1072 hinged to the lower part of the pull rod 1071. The side of the cross arm 1072 away from the pull rod 1071 is fixed to the third rotating shaft 102. The pull rod 1071 can pull the cross arm 1072 upward when the third rotating shaft 102 is close to the support roller 11. The pull rod 1071, the cross arm 1072, and the support arm 101 form a three-bar linkage. When the first drive assembly 106 drives the support arm 101 to swing, the pull rod 1071 pulls the cross arm 1072 upward, thereby rotating the third rotating shaft 102, which in turn adjusts the attitude of the pneumatic finger 104 and the clamping fixture 105 so that the jewelry chain clamped by the clamping fixture 105 is in an inverted U-shape, and the jewelry chain has an attitude that can stably overlap the support roller 11. A baffle 12 is hinged to the side of the frame 1 near the support roller 11. The frame 1 is equipped with a micro switch 13, which can contact the downward-hanging baffle 12. The micro switch 13 controls the connection to the first drive assembly 106 and the second drive assembly 108. When several cut jewelry chains are loaded on the support roller 11, the operator flips the baffle 12 and manually removes the jewelry chains from the support roller 11. After the operator flips the baffle 12, it disengages from the micro switch 13, and the first drive assembly 106 and the second drive assembly 108 stop operating, ensuring the personal safety of the operator when removing the jewelry chains from the support roller 11. The cut jewelry chains temporarily fall freely. It should be noted that when the baffle 12 disengages from the micro switch 13, the jewelry chain cutting operation is not affected, ensuring the overall efficiency of the cutting operation.

[0043] In use, the feeding mechanism 7 conveys the jewelry chain to be cut from top to bottom through the guide hole 61, ensuring the accuracy of the jewelry chain's position. (See reference...) Figure 14After a jewelry chain of a preset length is fed through the guide hole 61, the chain remains suspended. The drive mechanism 4 actuates the output end, causing the elastic bar 8 and the moving blade 5 on the output end to move towards the guide hole 61 and the fixed blade 3. The elastic bar 8 first contacts the jewelry chain and moves against it. Part of the chain gradually approaches the first cutting section 31. Under the obstruction of the first cutting section 31 and the elastic pressure exerted by the elastic bar 8, the suspended jewelry chain changes its posture, and part of the chain gradually approaches the first inclined section 312. The position of the chain near the cutting point undergoes vertical displacement. The junction of the first straight section 311 and the first inclined section 312 abuts against the chain between the decorative body above and below the cutting point. The first straight section 311 of the fixed blade 3 abuts against the decorative body below the cutting point, preventing the decorative body from excessively moving upward. As the elastic bar 8 and the moving blade 5 continue to move, the elastic bar 8 prevents pressure deformation on the jewelry chain and avoids damage to itself through its own elastic deformation function. The second straight part 511 of the moving blade 5 cooperates with the first straight part 311 of the fixed blade 3 to complete the cutting of the chain. When the first straight part 311 abuts against the decorative body below the cut point of the jewelry chain, as the second straight part 511 approaches the first straight part 311, with the continuous movement of the moving blade 5, the second inclined part 512 can abut against the decorative body located below the cut point of the jewelry chain and, through its own shape, slightly lower the decorative body and jewelry chain below the elastic bar 8. That is, the movement of the second inclined part 512 overcomes the elastic force of the elastic bar 8, thereby slightly changing the posture of the jewelry chain abutted by the elastic bar 8, ensuring that the second straight part 511 and the first straight part 311 cut on the chain body and not on the decorative body. In any case, the maximum upward position of the decorative part below the cut point of the jewelry chain is against the first straight part 311. Therefore, the first straight part 311 and the second straight part 511 can only be aligned with the chain and cut off the chain.

[0044] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims of this patent, they should all fall within the protection scope of this utility model.

Claims

1. A jewelry chain cutting machine, comprising a frame (1), said frame (1) being provided with a support mechanism (2) for supporting the jewelry chain to be cut, characterized in that: The frame (1) is fixedly provided with a fixed blade (3), the fixed blade (3) is provided with a first cutting section (31), the first cutting section (31) includes a first straight section (311) and a first inclined section (312) located above the first straight section (311), the first straight section (311) and the first inclined section (312) have an acute-angled inner angle, the frame (1) is provided with a drive mechanism (4) whose output end can perform reciprocating linear motion, the output end of the drive mechanism (4) is provided with a moving blade (5), the moving blade (5) can approach and move away from the fixed blade (3) through the output end of the drive mechanism (4), the moving blade (5) is provided with a second cutting section (51), the second cutting section (51) includes a second straight section (511) and a second inclined section (512) located below the second straight section (511). The second straight portion (511) and the second inclined portion (512) have an acute-angled inner angle. The frame (1) is fixedly provided with a guide frame (6). The guide frame (6) is provided with a vertically penetrating guide hole (61). The guide hole (61) is located between the first cutting portion (31) and the second cutting portion (51) in the moving direction of the output end of the drive mechanism (4). The frame (1) is provided with a feeding mechanism (7). The feeding mechanism (7) can transport the jewelry chain on the bearing mechanism (2) toward the guide hole (61). The output end of the drive mechanism (4) is provided with an elastic strip (8) for contacting the jewelry chain and bringing the jewelry chain closer to the first inclined portion (312). The elastic strip (8) is located between the guide hole (61) and the second cutting portion (51) in the moving direction of the output end of the drive mechanism (4).

2. The jewelry chain cutting machine according to claim 1, characterized in that: The drive mechanism (4) includes a first motor (41) mounted on a frame (1). The output end of the first motor (41) is eccentrically provided with a bearing (42). The frame (1) is slidably connected to a sliding frame (43) that can slide back and forth and serves as the output end. The sliding frame (43) is provided with an elongated hole (431) for contacting the outer side of the bearing (42). The elongated hole (431) has a clearance interval on the left and right sides to the outer side of the bearing (42). The clearance interval is used to avoid the movement of the bearing (42) in the left and right horizontal direction when it swings eccentrically relative to the output end of the first motor (41).

3. The jewelry chain cutting machine according to claim 1, characterized in that: The feeding mechanism (7) includes a second motor (71) mounted on a frame (1). The frame (1) is rotatably connected to a first rotating shaft (72) and a second rotating shaft (73). The second motor (71) is driven to the first rotating shaft (72). The first rotating shaft (72) is provided with a feeding wheel (74). The outer surface of the feeding wheel (74) is provided with a plurality of protrusions (741). A stop interval is formed between two adjacent protrusions (741) in the circumferential direction, which can accommodate a single decorative object. The second rotating shaft (73) is provided with an abutment wheel (75). The abutment wheel (75) prevents the decorative object from dislodging from the stop interval when the feeding wheel (74) rotates.

4. The jewelry chain cutting machine according to claim 1, characterized in that: The frame (1) is equipped with a collection box (9) for collecting jewelry chains cut by the fixed blade (3) and the moving blade (5).

5. The jewelry chain cutting machine according to claim 3, characterized in that: The frame (1) is provided with a clamping mechanism (10) that can clamp the jewelry chain from the feeding wheel (74) and the abutment wheel (75). The frame (1) is provided with a carrying roller (11). The clamping mechanism (10) can clamp the jewelry chain before it is cut and place the cut jewelry chain on the carrying roller (11).

6. The jewelry chain cutting machine according to claim 5, characterized in that: The clamping mechanism (10) includes two upper arms (101) hinged to the frame (1). The lower parts of the two arms (101) are rotatably connected to a third rotating shaft (102). The third rotating shaft (102) is fixedly provided with a mounting base (103). The mounting base (103) is provided with pneumatic fingers (104). The pneumatic fingers (104) have a first clamping end and a second clamping end that can move closer to and further away from each other. The first clamping end and the second clamping end are respectively provided with clamping fixtures (105). The clamping fixtures (105) include a fixture frame (1051). The fixture frame (1051) is provided with two clamping blocks (1052) spaced apart vertically. The clamping fixtures (105) on the first and second clamping ends are symmetrically arranged. The frame (1) is provided with a first drive assembly (106) for driving the support arm (101) to swing until the pneumatic finger (104) approaches the bearing roller (11). The frame (1) is provided with a posture adjustment assembly (107). The posture adjustment assembly (107) can drive the third rotating shaft (102) to rotate when it approaches the bearing roller (11) so that the front and rear ends of the jewelry chain clamped by the clamping fixture (105) are respectively located on the front and rear sides of the bearing roller (11). The frame (1) is provided with a second drive assembly (108) for driving the bearing roller (11) to approach and move away from the third rotating shaft (102) along its own axis.

7. The jewelry chain cutting machine according to claim 6, characterized in that: The attitude adjustment assembly (107) includes a pull rod (1071) hinged to the upper part of the frame (1), and a cross arm (1072) hinged to the lower part of the pull rod (1071). The side of the cross arm (1072) away from the pull rod (1071) is fixed to the third rotating shaft (102). The pull rod (1071) can pull the cross arm (1072) upward when the third rotating shaft (102) is close to the bearing roller (11).

8. The jewelry chain cutting machine according to claim 6, characterized in that: The frame (1) has a baffle (12) hinged to the side near the bearing roller (11). The frame (1) is provided with a micro switch (13). The micro switch (13) can contact the baffle (12) that hangs freely downwards. The micro switch (13) is connected to the first drive assembly (106) and the second drive assembly (108).

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