A pneumatic control system for a button sewing machine

Abstract

The application discloses a kind of pneumatic control system for button sewing machine, it is related to the field of button sewing machine, it includes rack, push-pull cylinder, push-pull frame, reversing rod, first reversing cylinder and second reversing cylinder, push-pull frame is provided with sliding support, sliding support is fixedly connected with reversing rod, and sliding support and / or reversing rod are provided with first damping member between push-pull frame, sliding support is slidably provided with trigger rod, and elastic component is connected between trigger rod and sliding support;Rack is fixed with first press type two-position three-way valve and second press type two-position three-way valve, and the press contact of first press type two-position three-way valve and second press type two-position three-way valve is all towards push-pull cylinder side and respectively with the two ends of trigger rod cooperation.The application has the effect of realizing the orderly movement of the pneumatic control of first reversing cylinder and second reversing cylinder, which helps to improve the applicability of button sewing machine.

Description

Technical Field

[0001] This application relates to the field of button sewing machines, and more particularly to a pneumatic control system for button sewing machines. Background Technology

[0002] A conveyor belt fastening machine is a specialized mechanical device used to fasten buckles onto conveyor belts. It mainly consists of a frame, machine head, fastening device, and transmission structure. Conveyor belt fastening machines are suitable for conveyor belts of different widths and thicknesses, as well as fasteners of different materials and specifications, making them widely applicable and used in mines, docks, power plants, and other locations requiring conveyor belts.

[0003] A utility model patent with publication number CN203702990U discloses a lever-type fastening machine for fastening conveyor belt buckles onto a conveyor belt. The machine includes a frame, a guide template, and a machine head. The machine head has a left handle, a right handle, a fastening mechanism, and a shifting and positioning mechanism. The left handle is coupled to the shifting and positioning mechanism, and the right handle is coupled to the fastening mechanism. The left and right handles are only used to distinguish their relative positions, not to define their specific positions on the machine head. The template is fixed to the frame, and the machine head is engaged with the template and can slide on it. The fastening mechanism includes a crank connected to the right handle. Different positions of the crank connect to two sets of linkage mechanisms. One set of linkage mechanisms controls the up-and-down movement of a punch to drive the saddle nail into the buckle body of the conveyor belt buckle. The other set of linkage mechanisms controls a pull cutter, whose movement direction is inclined and allows the pull cutter to contact the tip of the saddle nail of the conveyor belt buckle.

[0004] In practical applications, a row of "H"-shaped holes is cut into the template. These holes allow the saddle stitchers on the conveyor belt fasteners to be inserted, as well as the punch and positioning slider head on the die head. When the left handle on the die head moves upward, the shifting and positioning mechanism moves the die head one empty position, and at the end of the stroke, inserts the head of the positioning slider into the hole in the template, achieving positioning. When the right handle is pulled down, the fastening mechanism drives the punch into another hole in the template, pushing the saddle stitcher into the fastener body. When the right handle is pushed back, it drives the pull cutter to bend the head of the saddle stitcher. Alternating between the left and right handles allows the die head to move gradually from the left end to the right end of the template, completing the customization of the full-width conveyor belt joint.

[0005] Currently, see Figure 1To facilitate control of the two handles 2, a first connecting rod 21 is hinged to the left handle, and a second connecting rod 22 is hinged to the right handle. The two handles 2 have identical structures; only one handle 2 is shown in the figure. Switching holes 23 are provided on the side of the first connecting rod 21 away from the left handle and on the side of the second connecting rod 22 away from the right handle. The axes of the two switching holes 23 can be collinear. A push-pull cylinder 11 is fixed to the side of the frame 1 away from the machine head 3, with the piston rod of the push-pull cylinder 11 facing the machine head 3. A push-pull frame 4 is fixed to the end of the piston rod of the push-pull cylinder 11. A reversing rod 41 is provided on the push-pull frame 4. The reversing rod 41 slides axially along the switching holes 23, and both ends of the reversing rod 41 are respectively inserted into the two switching holes 23. Furthermore, a first reversing cylinder 12 is fixed to the left handle side of the frame 1, and a second reversing cylinder 13 is fixed to the right handle side of the frame 1. The first reversing cylinder 12 and the second reversing cylinder 13 are respectively located at positions away from each other on the first connecting rod 21 and the second connecting rod 22, and the piston rods of the first reversing cylinder 12 and the second reversing cylinder 13 both face towards each other. Moreover, the first reversing cylinder 12 and the second reversing cylinder 13 control the gas input and output of the rodless chamber and the rod chamber respectively through two solenoid valves, thereby causing the piston rods of the first reversing cylinder 12 and the second reversing cylinder 13 to extend and retract.

[0006] In the initial state, the piston rod of the push-pull cylinder 11 is not extended, and the end of the reversing rod 41 is inserted into the switching hole 23 on the first connecting rod 21. At this time, the piston rods of the first reversing cylinder 12 and the second reversing cylinder 13 are both collinear with the axis of the switching hole 23 on the second connecting rod 22, and the piston rod of the second reversing cylinder 13 passes through the switching hole 23 on the second connecting rod 22. During operation, the piston rod of the push-pull cylinder 11 extends, which will drive the first connecting rod 21 and the left handle to move. When the reversing rod 41 is aligned with the switching hole 23 on the second connecting rod 22, the first reversing cylinder 12 pushes the reversing rod 41 to move, so that the corresponding end of the reversing rod 41 exits the switching hole 23 on the first connecting rod 21, and the piston rod of the first reversing cylinder 12 extends into the switching hole 23 on the first connecting rod 21, so that the corresponding end of the reversing rod 41 is inserted into the switching hole 23 on the second connecting rod 22. At this time, the push-pull cylinder 11 can drive the second connecting rod 22 and the right handle. In this way, the two handles 2 can be driven alternately.

[0007] However, the solenoid valve needs to be connected to a power source and energized in order to control the first and second reversing cylinders in an orderly manner. In some harsh environments (such as mines and coal mines), it is difficult to maintain a normal power supply, which limits the use of the above-mentioned button-attaching machine and reduces its applicability, thus requiring improvement. Summary of the Invention

[0008] In order to improve the problem that the extension and retraction of the piston rod of the first and second reversing cylinders controlled by solenoid valves in the related technology results in low applicability of the button attaching machine, this application provides a pneumatic control system for the button attaching machine.

[0009] This application provides a pneumatic control system for a button-attaching machine, which adopts the following technical solution: A pneumatic control system for a button-attaching machine includes a frame, a push-pull cylinder, a push-pull frame, a reversing rod, a first reversing cylinder, and a second reversing cylinder. A sliding bracket is provided on the push-pull frame, and the sliding bracket is fixedly connected to the reversing rod. A first damping element for providing resistance to the movement of the sliding bracket is provided between the sliding bracket and / or the reversing rod and the push-pull frame. An actuating rod is slidably provided on the sliding bracket. The actuating rod is arranged along the axial direction of the reversing rod, and an elastic component for resetting the actuating rod relative to the sliding bracket is connected between the actuating rod and the sliding bracket. The frame is fixed with a first push-type two-position three-way valve on one side of the first reversing cylinder, and the output port of the first push-type two-position three-way valve is connected to the rodless chamber of the first reversing cylinder. The frame is fixed with a second push-type two-position three-way valve on one side of the second reversing cylinder. The output port of the second push-type two-position three-way valve is connected to the rodless chamber of the second reversing cylinder. Furthermore, the pressing contacts of the first and second press-type two-position three-way valves are both oriented towards the push-pull cylinder side and respectively cooperate with the two ends of the actuating rod; When the first and second push-type two-position three-way valves are not activated, the output port of the first push-type two-position three-way valve is connected to the exhaust port of the first push-type two-position three-way valve, and the output port of the second push-type two-position three-way valve is connected to the exhaust port of the second push-type two-position three-way valve.

[0010] By adopting the above technical solution, in practical applications, high-pressure air can be supplied from the high-pressure gas cylinder to the push-pull cylinder, the first reversing cylinder, and the second reversing cylinder. In the initial state, the end of the reversing rod is inserted into the switching hole on the first connecting rod.

[0011] When the piston rod of the push-pull cylinder extends, the push-pull bracket, the reversing rod, and the trigger rod move toward the side where the first and second reversing cylinders are located, and push the first connecting rod.

[0012] When the axis of the switching hole on the first connecting rod is collinear with the axis of the piston rod of the first reversing cylinder, the actuating rod abuts against the contact point of the first push-type two-position three-way valve, and the output port and the inlet port of the first push-type two-position three-way valve are connected. At this time, high-pressure gas will enter the rodless chamber of the first reversing cylinder, the piston rod of the first reversing cylinder will extend out and push the reversing rod, the piston rod of the first reversing cylinder will extend into the switching hole on the first connecting rod, the end of the reversing rod will exit the switching hole on the first connecting rod, and the other end of the reversing rod will extend into the switching hole of the second connecting rod; at the same time, the sliding bracket moves with the reversing rod, and under the limit of the second push-type two-position three-way valve, the actuating rod does not move, and the elastic component is compressed.

[0013] When the push-pull cylinder retracts the piston rod, the push-pull bracket, reversing rod, and trigger rod move toward the push-pull cylinder and pull the second connecting rod. At this time, the trigger rod moves away from the first press-type two-position three-way valve and the second press-type two-position three-way valve. Under the obstruction of the sliding bracket by the first damping element, the elastic component will push the trigger rod to move relative to the sliding bracket and reset relative to the sliding bracket.

[0014] When the piston rod of the push-pull cylinder extends again, the trigger rod can activate the contact of the second push-type two-position three-way valve. The output port and the inlet port of the second push-type two-position three-way valve are connected. At this time, high-pressure gas will enter the rodless chamber of the second reversing cylinder. The second reversing cylinder extends its piston rod and pushes the reversing rod to move. Furthermore, the corresponding end of the reversing rod extends into the switching hole on the first connecting rod, which will push the piston rod of the first reversing cylinder and cause the piston rod of the first reversing cylinder to exit the switching hole on the first connecting rod.

[0015] In this way, the first and second linkages can be driven alternately to achieve pneumatic control of the orderly movement of the first and second reversing cylinders, which helps to improve the applicability of the button-attaching machine.

[0016] Preferably, the elastic component includes two compression springs, both of which are sleeved on the actuating rod. A stop is fixed in the middle of the actuating rod. The ends of the two compression springs that are close to each other abut against the stop, and the ends of the two compression springs that are far apart abut against the sliding bracket.

[0017] By adopting the above technical solution, two compression springs work together to reset the trigger rod, which facilitates the reset operation of the trigger rod.

[0018] Preferably, the sliding bracket is a sliding sleeve, and the actuating rod and the two compression springs are all located inside the sliding sleeve.

[0019] By adopting the above technical solution, the stability of the trigger rod and the two compression springs can be guaranteed.

[0020] Preferably, the first damping element is a spring plunger, the first damping element is fixed on the push-pull bracket, and the abutment of the first damping element abuts against the sliding sleeve.

[0021] By adopting the above technical solution, the spring plunger provides damping force to the sliding sleeve, which helps to ensure the stability of the sliding sleeve on the push-pull frame.

[0022] Preferably, the output port of the first push-type two-position three-way valve is also connected to a first return pipe, which is connected to the rod chamber of the second reversing cylinder. The output port of the second push-type two-position three-way valve is also connected to a second return pipe, which is connected to the rod chamber of the first reversing cylinder.

[0023] By adopting the above technical solution, when the piston rod of the first reversing cylinder extends, high-pressure gas will simultaneously enter the rod chamber of the second reversing cylinder, causing the piston rod of the second reversing cylinder to retract. When the piston rod of the second reversing cylinder extends, high-pressure gas will simultaneously enter the rod chamber of the first reversing cylinder, causing the piston rod of the first reversing cylinder to retract, thereby facilitating the corresponding retraction operation of the piston rods of the first and second reversing cylinders.

[0024] Preferably, it also includes a first two-position five-way valve, wherein the rodless chamber and the rod chamber of the push-pull cylinder are respectively connected to the two output ports of the first two-position five-way valve.

[0025] By adopting the above technical solution, in practical applications, the air inlet of the first two-position five-way valve can be connected to the high-pressure gas cylinder, and the extension or retraction of the piston rod of the push-pull cylinder can be controlled through the first two-position five-way valve, thereby facilitating the control operation of the push-pull cylinder.

[0026] Preferably, the first two-position five-way valve is a pneumatically switched two-position five-way valve; The frame is fixed with a third push-type two-position three-way valve on one side of the push-pull cylinder, and the push-button of the third push-type two-position three-way valve faces the push-pull frame. The output port of the third push-type two-position three-way valve is connected to a pneumatic chamber of the first two-position five-way valve; when the push-pull cylinder retracts the piston rod, the push-pull bracket touches the pressing contact of the third push-type two-position three-way valve, and the air inlet and output port of the third push-type two-position three-way valve are connected.

[0027] By adopting the above technical solution, in practical applications, high-pressure gas can be supplied from a high-pressure gas cylinder to the third two-position three-way valve. When the push-pull cylinder retracts its piston rod, the push-pull bracket touches the pressing contact of the third push-type two-position three-way valve. At this time, high-pressure air can be sent into the corresponding pneumatic chamber of the first two-position five-way valve through the inlet and outlet of the third push-type two-position three-way valve, causing the air path inside the first two-position five-way valve to switch, so that the push-pull cylinder automatically extends its piston rod, thereby facilitating the control operation of extending the piston rod of the push-pull cylinder.

[0028] Preferably, an actuating frame is slidably disposed on the frame between the first reversing cylinder and the second reversing cylinder. The sliding direction of the actuating frame is parallel to the axial direction of the reversing rod. A slot is provided on the actuating frame facing the reversing rod. A plug is fixed to the middle part of the reversing rod facing the actuating frame. The plug is inserted into the slot. A fourth push-type two-position three-way valve and a fifth push-type two-position three-way valve are fixedly installed on the frame near the trigger frame. The pressing contacts of the fourth push-type two-position three-way valve and the fifth push-type two-position three-way valve face the two sides of the trigger frame on the axial direction of the reversing rod, respectively. When the reversing lever moves toward the second reversing cylinder, the trigger frame will actuate the fourth push-type two-position three-way valve push-contact; when the reversing lever moves toward the first reversing cylinder, the trigger frame will actuate the fifth push-type two-position three-way valve push-contact. Furthermore, the air inlet of the fourth push-type two-position three-way valve is connected to the output port of the first push-type two-position three-way valve, the air inlet of the fifth push-type two-position three-way valve is connected to the output port of the second push-type two-position three-way valve, a branch or valve is provided between the fourth push-type two-position three-way valve and the fifth push-type two-position three-way valve, the output ports of the fourth push-type two-position three-way valve and the fifth push-type two-position three-way valve are respectively connected to the two air inlets of the branch or valve, and the air outlet of the branch or valve is connected to another pneumatic chamber of the first two-position five-way valve; When the pressing contacts of the fourth and fifth press-type two-position three-way valves are not activated, the output port and exhaust port of the fourth press-type two-position three-way valve are connected, and the output port and exhaust port of the fifth press-type two-position three-way valve are connected.

[0029] By adopting the above technical solution, when the first or second reversing cylinder pushes the reversing rod to move, it will drive the trigger frame to move through the insert rod, and trigger the pressing contact of the fourth or fifth press-type two-position three-way valve. The high-pressure gas will enter the corresponding pneumatic chamber of the first two-position five-way valve through the air inlet and outlet of the fourth or fifth press-type two-position three-way valve. At this time, the air path inside the first two-position five-way valve is switched, causing the push-pull cylinder to retract the piston rod, thereby realizing the automatic retraction operation of the piston rod of the push-pull cylinder.

[0030] Preferably, the air inlet of the first two-position five-way valve is connected to a main air supply pipe, and a distribution pipe is connected to the main air supply pipe. The air inlets of the first push-button two-position three-way valve, the second push-button two-position three-way valve, and the third push-button two-position three-way valve are all connected to the distribution pipe. Furthermore, a throttling valve is installed on the side of the gas distribution pipe closest to the main gas supply pipe.

[0031] By adopting the above technical solution, on the one hand, a main gas supply pipe and a distribution pipe are set up, which facilitates the gas supply operation of the first two-position five-way valve, the first push-type two-position three-way valve, the second push-type two-position three-way valve, and the third push-type two-position three-way valve. On the other hand, by setting a throttle valve, the amount of air supplied to the main air supply pipe and the distribution pipe can be adjusted to ensure the thrust and pull of the push-pull cylinder.

[0032] Preferably, it also includes a second two-position five-way valve, which is a manual two-position five-way valve, and one of its output ports is connected to the main gas supply pipe; A vent pipe is connected between the rod chamber of the push-pull cylinder and the corresponding output port of the first two-position five-way valve. The vent pipe includes a first pipe section connected to the corresponding output port of the first two-position five-way valve and a second pipe section connected to the rod chamber of the push-pull cylinder. A main line or valve is provided between the first pipe section and the second pipe section. The other air inlet of the second two-position five-way valve and the first pipe section are respectively connected to the two air inlets of the main line or valve. The second pipe section is connected to the air outlet of the main line or valve.

[0033] By adopting the above technical solution, when the corresponding end of the reversing rod is inserted into the switching hole on the first connecting rod, the air path of the second two-position five-way valve can be switched manually, so that the air inlet of the main line or valve and the second two-position five-way valve are connected; at this time, high-pressure gas will enter the rod chamber of the push-pull cylinder, so that the button-attaching machine is reset and the button-attaching operation can be stopped, thus facilitating the shutdown operation of the button-attaching machine. Attached Figure Description

[0034] Figure 1 The right view mainly shows the structure of the fastener machine with the second reversing cylinder hidden. Figure 2 This is a schematic diagram illustrating the pneumatic control system of the button-attaching machine, which is the main feature of this embodiment. Figure 3 This is a schematic diagram illustrating the main structure of the push-pull frame in this embodiment; Figure 4 This is a schematic diagram illustrating the main structure of the trigger frame in this embodiment.

[0035] Reference numerals: 1. Frame; 11. Push-pull cylinder; 12. First reversing cylinder; 13. Second reversing cylinder; 14. First push-type two-position three-way valve; 141. First return pipe; 15. Second push-type two-position three-way valve; 151. Second return pipe; 16. Third push-type two-position three-way valve; 17. Second damping element; 18. Fourth push-type two-position three-way valve; 19. Fifth push-type two-position three-way valve; 2. Handle; 21. First connecting rod; 22. Second connecting rod; 23. Switching hole; 3. Machine head; 4. Push-pull frame; 41. Reversing rod; 411. Insert rod; 42. Sliding sleeve; 43. Actuating rod; 431. Abutment ring; 44. Clearance groove; 45. First damping element; 46. Elastic component; 461. Compression spring; 5. First two-position five-way valve; 51. Vent pipe; 511. First pipe section; 512. Second pipe section; 52. Main line or valve; 6. Second two-position five-way valve; 61. Main gas supply pipe; 62. Distribution pipe; 63. Throttling valve; 7. Actuating frame; 71. Sliding rod; 711. Slot; 72. Contact rod; 8. Branch line or valve. Detailed Implementation

[0036] The present application will be further described in detail below with reference to the accompanying drawings.

[0037] In related technologies, within the field of directional control valves, P represents the inlet port, A and B both represent outlet ports, and R and S both represent exhaust ports. Taking a two-position three-way directional control valve as an example, it includes one inlet port (P), one outlet port (A), and one exhaust port (R). Taking a two-position five-way directional control valve as an example, it includes one inlet port (P), two outlet ports (A, B), and two exhaust ports (R, S).

[0038] In addition, the pneumatic switching two-position five-way valve is a valve that uses the principle of cylinder to drive the valve core to move. By introducing high-pressure gas into the pneumatic chambers at both ends, the valve core is driven to reciprocate, thereby realizing the switching of the air path.

[0039] This application discloses a pneumatic control system for a button-attaching machine.

[0040] Reference Figure 1 and Figure 2 The pneumatic control system for the button-attaching machine includes a frame 1, a push-pull cylinder 11, a push-pull frame 4, a reversing rod 41, a first reversing cylinder 12, a second reversing cylinder 13, and also includes a first two-position five-way valve 5 for controlling the push-pull cylinder 11, a first push-type two-position three-way valve 14 for controlling the first reversing cylinder 12, a second push-type two-position three-way valve 15 for controlling the second reversing cylinder 13, and a second two-position five-way valve 6 for controlling the main airflow status of the control system.

[0041] Specifically, the first two-position five-way valve 5 is a pneumatically switchable two-position five-way valve, and the second two-position five-way valve 6 is a manually operated two-position five-way valve. A main air supply pipe 61 connects one output port of the second two-position five-way valve 6 to the air inlet of the first two-position five-way valve 5. A vent pipe 51 connects the rod-side chamber of the push-pull cylinder 11 to one output port of the first two-position five-way valve 5, and the other output port of the first two-position five-way valve 5 is connected to the rodless chamber of the push-pull cylinder 11. The vent pipe 51 includes a first pipe section 511 connected to the corresponding air inlet of the first two-position five-way valve 5, and a second pipe section 512 connected to the rod-side chamber of the push-pull cylinder 11. A main line or valve 52 is provided between the first pipe section 511 and the second pipe section 512. The other air outlet of the second two-position five-way valve 6 and the first pipe section 511 are respectively connected to the two air inlets of the main line or valve 52, and the second pipe section 512 is connected to the air outlet of the main line or valve 52. In practical applications, the air inlet of the second two-position five-way valve 6 can be connected to a high-pressure gas cylinder or an air compressor, with a high-pressure gas cylinder being preferred. When the second two-position five-way valve 6 is manually switched, the supply of air to the main gas supply pipe 61 can be opened or closed; when the supply of air to the main gas supply pipe 61 is closed, high-pressure air is supplied to the rod chamber of the push-pull cylinder 11 through the second two-position five-way valve 6 and the main line or valve 52, causing the push-pull cylinder 11 to retract its piston rod and reset.

[0042] See Figure 2 and Figure 3 The push-pull frame 4 is equipped with a sliding bracket, which is a sliding sleeve 42. The axis of the sliding sleeve 42 is parallel to the axis of the reversing rod 41. The sliding sleeve 42 passes through the push-pull frame 4 along its axial direction and is slidably connected to the push-pull frame 4. A clearance groove 44 is provided in the middle of the push-pull frame 4. The portions of the sliding sleeve 42 and the reversing rod 41 located in the clearance groove 44 are fixedly connected by a connecting rod. At the same time, the push-pull frame 4 is also equipped with a first damping element 45. The first damping element 45 is a spring plunger. The outer shell of the first damping element 45 is sleeve-shaped, and the first damping element 45 is screwed into the push-pull frame 4 from the side away from the sliding sleeve 42. The abutment of the first damping element 45 abuts against the sliding sleeve 42. In other embodiments, the first damping member 45 can be screwed into the push-pull bracket 4 from the side of the push-pull bracket 4 away from the reversing rod 41, and the abutment of the first damping member 45 abuts against the reversing rod 41. Of course, the first damping member 45 can also be provided in a set relative to the sliding sleeve 42 and the reversing rod 41.

[0043] An actuating rod 43 is coaxially inserted inside the sliding sleeve 42. Both ends of the actuating rod 43 extend from both ends of the sliding sleeve 42 and the corresponding sides of the push-pull bracket 4. An elastic component 46 connects the actuating rod 43 to the sliding sleeve 42 to reset the actuating rod 43 relative to the sliding sleeve 42. The elastic component 46 includes two compression springs 461, both located inside the sliding sleeve 42 and sleeved on the actuating rod 43. A stop member is fixed to the middle of the actuating rod 43. In this embodiment, the stop member is a stop ring 431. The ends of the two compression springs 461 that are close to each other abut against the stop ring 431, and the ends of the two compression springs 461 that are opposite to each other abut against the corresponding ends of the sliding sleeve 42.

[0044] The first push-type two-position three-way valve 14 is fixed to the frame 1 and located on one side of the first reversing cylinder 12. The output port of the first push-type two-position three-way valve 14 is connected to the rodless chamber of the first reversing cylinder 12. The second push-type two-position three-way valve 15 is fixed to the frame 1 and located on one side of the second reversing cylinder 13. The output port of the second push-type two-position three-way valve 15 is connected to the rodless chamber of the second reversing cylinder 13. A gas distribution pipe 62 is connected to the middle of the main gas supply pipe 61. The air inlets of the first push-type two-position three-way valve 14 and the second push-type two-position three-way valve 15 are both connected to the gas distribution pipe 62, and a throttle valve 63 is provided at the end of the gas distribution pipe 62 near the main gas supply pipe 61. The pressing contacts of the first push-type two-position three-way valve 14 and the second push-type two-position three-way valve 15 are both facing the push-pull cylinder 11 and are respectively engaged with the two ends of the actuating rod 43. When the first push-button two-position three-way valve 14 and the second push-button two-position three-way valve 15 are not activated, the output port of the first push-button two-position three-way valve 14 is connected to its exhaust port, and the output port of the second push-button two-position three-way valve 15 is connected to its exhaust port. Simultaneously, the output port of the first push-button two-position three-way valve 14 is also connected to a first return pipe 141, which is connected to the rod chamber of the second reversing cylinder 13; the output port of the second push-button two-position three-way valve 15 is also connected to a second return pipe 151, which is connected to the rod chamber of the first reversing cylinder 12.

[0045] A third push-type two-position three-way valve 16 is fixed on one side of the push-pull cylinder 11, with its push-contact facing the push-pull frame 4. The output port of the third push-type two-position three-way valve 16 is connected to one pneumatic chamber of the first two-position five-way valve 5. When the piston rod of the push-pull cylinder 11 retracts, the push-pull frame 4 actuates the push-contact of the third push-type two-position three-way valve 16, connecting its inlet and outlet. At this time, high-pressure gas enters the corresponding pneumatic chamber of the first two-position five-way valve 5 through the third push-type two-position three-way valve 16, completing the gas path switching of the first two-position five-way valve 5. The high-pressure gas can then enter the rodless chamber of the push-pull cylinder 11, causing the push-pull cylinder 11 to extend its piston rod.

[0046] See Figure 2 and Figure 4 An actuating frame 7 is disposed on the frame 1 between the first reversing cylinder 12 and the second reversing cylinder 13. The actuating frame 7 includes a slide rod 71 and a contact rod 72. The slide rod 71 has a square cross-section, and its length direction is parallel to the axial direction of the reversing rod 41. The slide rod 71 passes through a portion of the frame 1 along its length direction and is slidably connected to the frame 1. One contact rod 72 is fixed at each end of the slide rod 71, and both contact rods 72 face the side of the slide rod 71 away from the push-pull cylinder 11. A slot 711 is provided on the slide rod 71 facing the reversing rod 41, and an insert rod 411 is fixed in the middle of the reversing rod 41 facing the actuating frame 7. The insert rod 411 is inserted into the slot 711. Furthermore, a second damping element 17 is provided on the frame 1. The second damping element 17 is a spring plunger. The outer shell of the second damping element 17 is sleeve-shaped. The second damping element 17 is screwed into the frame 1 from the side of the frame 1 that is partially away from the slide rod 71. The abutment of the second damping element 17 abuts against the slide rod 71.

[0047] A fourth push-type two-position three-way valve 18 and a fifth push-type two-position three-way valve 19 are fixed on the frame 1 between two contact rods 72. The pressing contact of the fourth push-type two-position three-way valve 18 faces the contact rod 72 located on the side of the first reversing cylinder 12, and the pressing contact of the fifth push-type two-position three-way valve 19 faces the contact rod 72 located on the side of the second reversing cylinder 13. When the reversing rod 41 moves towards the side of the second reversing cylinder 13, the contact rod 72 will actuate the pressing contact of the fourth push-type two-position three-way valve 18; when the reversing rod 41 moves towards the side of the first reversing cylinder 12, the contact rod 72 will actuate the pressing contact of the fifth push-type two-position three-way valve 19.

[0048] Furthermore, the air inlet of the fourth push-type two-position three-way valve 18 is connected to the output port of the first push-type two-position three-way valve 14, and the air inlet of the fifth push-type two-position three-way valve 19 is connected to the output port of the second push-type two-position three-way valve 15. A branch or valve 8 is provided between the fourth push-type two-position three-way valve 18 and the fifth push-type two-position three-way valve 19. The output ports of the fourth push-type two-position three-way valve 18 and the fifth push-type two-position three-way valve 19 are respectively connected to the two air inlets of the branch or valve 8, and the air outlet of the branch or valve 8 is connected to another pneumatic chamber of the first two-position five-way valve 5. When the pressing contacts of the fourth push-type two-position three-way valve 18 and the fifth push-type two-position three-way valve 19 are not activated, the output port of the fourth push-type two-position three-way valve 18 is connected to the exhaust port, and the output port of the fifth push-type two-position three-way valve 19 is connected to the exhaust port.

[0049] It should be noted that in this embodiment, the first press-type two-position three-way valve 14, the second press-type two-position three-way valve 15, the third press-type two-position three-way valve 16, the fourth press-type two-position three-way valve 18, and the fifth press-type two-position three-way valve 19 can all be roller-type two-position three-way valves.

[0050] The implementation principle of a pneumatic control system for a button-attaching machine according to an embodiment of this application is as follows: In practical applications, the inlet of the second two-position five-way valve 6 is connected to the high-pressure gas cylinder. By manually switching the second two-position five-way valve 6, high-pressure gas can be supplied to the main gas supply pipe 61 and the gas distribution pipe 62. The gas flow rate to the gas distribution pipe 62 can be controlled by the throttle valve 63.

[0051] In the initial state, the piston rod of the push-pull cylinder 11 is in the retracted state, and the air inlet of the first two-position five-way valve 5 is connected to the rodless chamber of the push-pull cylinder 11. The main air supply pipe 61 and the branch air pipe 62 are vented, the piston rod of the push-pull cylinder 11 extends, and the push-pull bracket 4, the reversing rod 41, and the trigger rod 43 move toward the side where the first reversing cylinder 12 and the second reversing cylinder 13 are located, and push the first connecting rod 21.

[0052] When the axis of the switching hole 23 on the first connecting rod 21 is collinear with the axis of the piston rod of the first reversing cylinder 12, the actuating rod 43 will abut against the contact of the first push-type two-position three-way valve 14, and the output port and the inlet port of the first push-type two-position three-way valve 14 will be connected. At this time, high-pressure gas will enter the rodless chamber of the first reversing cylinder 12, the piston rod of the first reversing cylinder 12 will extend and push the reversing rod 41. The end of the reversing rod 41 will exit the switching hole 23 on the first connecting rod 21, and the other end of the reversing rod 41 will extend into the switching hole 23 of the second connecting rod 22. Furthermore, the sliding sleeve 42 moves with the reversing rod 41. Under the limit of the second push-type two-position three-way valve 15, the actuating rod 43 will not move, and the corresponding compression spring 461 will be compressed.

[0053] At the same time, the touch rod 72 will actuate the pressing contact of the fourth press-type two-position three-way valve 18, and the high-pressure gas will be sent into the corresponding pneumatic chamber of the first two-position five-way valve 5 through the fourth press-type two-position three-way valve 18 and the branch or valve 8, thereby switching the air path of the first two-position five-way valve 5. The high-pressure gas will enter the rod chamber of the push-pull cylinder 11 through the first two-position five-way valve 5, and the push-pull cylinder 11 will retract the piston rod.

[0054] When the piston rod of the push-pull cylinder 11 retracts, the push-pull bracket 4, the reversing rod 41, and the trigger rod 43 move toward the push-pull cylinder 11 and pull the second connecting rod 22. At this time, the trigger rod 43 moves away from the first push-type two-position three-way valve 14 and the second push-type two-position three-way valve 15. Under the obstruction of the first damping element 45 on the sliding sleeve 42, the corresponding compression spring 461 will push the trigger rod 43 to move relative to the sliding sleeve 42 and reset relative to the sliding sleeve 42.

[0055] After the push-pull cylinder 11 retracts its piston rod, the push-pull bracket 4 touches the pressing contact of the third press-type two-position three-way valve 16. At this time, high-pressure air can be sent into the corresponding pneumatic chamber of the first two-position five-way valve 5 through the air inlet and outlet of the third press-type two-position three-way valve 16, and the air path inside the first two-position five-way valve 5 is switched, so that the push-pull cylinder 11 automatically extends its piston rod.

[0056] When the axis of the switching hole 23 on the second connecting rod 22 is collinear with the axis of the piston rod of the second reversing cylinder 13, the actuating rod 43 will abut against the contact of the second push-type two-position three-way valve 15, and the output port and the inlet port of the second push-type two-position three-way valve 15 will be connected. At this time, high-pressure gas will enter the rodless chamber of the second reversing cylinder 13 and the rod chamber of the first reversing cylinder 12. The first reversing cylinder 12 will retract its piston rod, and the second reversing cylinder 13 will extend its piston rod and push the reversing rod 41. The end of the reversing rod 41 will exit the switching hole 23 on the second connecting rod 22, and the other end of the reversing rod 41 will extend into the switching hole 23 on the first connecting rod 21. Furthermore, the sliding sleeve 42 moves with the reversing rod 41. Under the limit of the first push-type two-position three-way valve 14, the actuating rod 43 will not move, and the corresponding compression spring 461 will be compressed.

[0057] Simultaneously, the contact rod 72 will actuate the pressing contact of the fifth push-type two-position three-way valve 19. High-pressure gas will be sent through the fifth push-type two-position three-way valve 19 and the branch or valve 8 into the corresponding pneumatic chamber of the first two-position five-way valve 5, thereby switching the air path of the first two-position five-way valve 5. The high-pressure gas will then enter the rod chamber of the push-pull cylinder 11 through the first two-position five-way valve 5, causing the push-pull cylinder 11 to retract its piston rod. Through this process, the automatic customization of the conveyor belt by the fastening machine is realized.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pneumatic control system for a button-attaching machine, comprising a frame (1), a push-pull cylinder (11), a push-pull frame (4), a reversing rod (41), a first reversing cylinder (12), and a second reversing cylinder (13), characterized in that: The push-pull frame (4) is provided with a sliding bracket, which is fixedly connected to the reversing rod (41). A first damping element (45) for providing resistance to the movement of the sliding bracket is provided between the sliding bracket and / or the reversing rod (41) and the push-pull frame (4). An actuating rod (43) is slidably provided on the sliding bracket. The actuating rod (43) is axially arranged along the reversing rod (41), and an elastic component (46) for resetting the actuating rod (43) relative to the sliding bracket is connected between the actuating rod (43) and the sliding bracket. The frame (1) is fixed with a first push-type two-position three-way valve (14) on one side of the first reversing cylinder (12), and the output port of the first push-type two-position three-way valve (14) is connected to the rodless chamber of the first reversing cylinder (12); The frame (1) is fixed with a second push-type two-position three-way valve (15) on one side of the second reversing cylinder (13), and the output port of the second push-type two-position three-way valve (15) is connected to the rodless chamber of the second reversing cylinder (13); Furthermore, the pressing contacts of the first press-type two-position three-way valve (14) and the second press-type two-position three-way valve (15) are both facing the push-pull cylinder (11) and respectively cooperate with the two ends of the actuating rod (43); When the first push-type two-position three-way valve (14) and the second push-type two-position three-way valve (15) are not activated, the output port of the first push-type two-position three-way valve (14) is connected to the exhaust port of the first push-type two-position three-way valve (14), and the output port of the second push-type two-position three-way valve (15) is connected to the exhaust port of the second push-type two-position three-way valve (15). The output port of the first push-type two-position three-way valve (14) is also connected to the first return pipe (141), which is connected to the rod chamber of the second reversing cylinder (13). The output port of the second push-type two-position three-way valve (15) is also connected to the second return pipe (151), which is connected to the rod chamber of the first reversing cylinder (12). It also includes a first two-position five-way valve (5), wherein the rodless chamber and the rod chamber of the push-pull cylinder (11) are respectively connected to the two output ports of the first two-position five-way valve (5); The first two-position five-way valve (5) is a pneumatically switched two-position five-way valve; The frame (1) is fixed with a third press-type two-position three-way valve (16) on one side of the push-pull cylinder (11), and the pressing contact of the third press-type two-position three-way valve (16) faces the push-pull frame (4). The output port of the third press-type two-position three-way valve (16) is connected to a pneumatic chamber of the first two-position five-way valve (5); when the push-pull cylinder (11) retracts the piston rod, the push-pull bracket (4) touches the press contact of the third press-type two-position three-way valve (16), and the air inlet and output port of the third press-type two-position three-way valve (16) are connected. An actuating frame (7) is slidably disposed on the frame (1) between the first reversing cylinder (12) and the second reversing cylinder (13). The sliding direction of the actuating frame (7) is parallel to the axial direction of the reversing rod (41). A slot (711) is provided on the actuating frame (7) facing the reversing rod (41). A plug (411) is fixed on the middle part of the reversing rod (41) facing the actuating frame (7). The plug (411) is inserted into the slot (711). A fourth press-type two-position three-way valve (18) and a fifth press-type two-position three-way valve (19) are fixedly installed on the frame (1) near the trigger frame (7). The pressing contacts of the fourth press-type two-position three-way valve (18) and the fifth press-type two-position three-way valve (19) are respectively facing the trigger frame (7) on both sides of the reversing rod (41) axial direction. When the reversing lever (41) moves toward the second reversing cylinder (13), the trigger frame (7) will trigger the pressing contact of the fourth press-type two-position three-way valve (18); when the reversing lever (41) moves toward the first reversing cylinder (12), the trigger frame (7) will trigger the pressing contact of the fifth press-type two-position three-way valve (19). Furthermore, the air inlet of the fourth press-type two-position three-way valve (18) is connected to the output port of the first press-type two-position three-way valve (14), the air inlet of the fifth press-type two-position three-way valve (19) is connected to the output port of the second press-type two-position three-way valve (15), a branch or valve (8) is provided between the fourth press-type two-position three-way valve (18) and the fifth press-type two-position three-way valve (19), the output ports of the fourth press-type two-position three-way valve (18) and the fifth press-type two-position three-way valve (19) are respectively connected to the two air inlets of the branch or valve (8), and the air outlet of the branch or valve (8) is connected to another pneumatic chamber of the first two-position five-way valve (5); When the pressing contacts of the fourth press-type two-position three-way valve (18) and the fifth press-type two-position three-way valve (19) are not touched, the output port and the exhaust port of the fourth press-type two-position three-way valve (18) are connected, and the output port and the exhaust port of the fifth press-type two-position three-way valve (19) are connected. The air inlet of the first two-position five-way valve (5) is connected to the main gas supply pipe (61), and the main gas supply pipe (61) is connected to the gas distribution pipe (62). The air inlets of the first push-type two-position three-way valve (14), the second push-type two-position three-way valve (15), and the third push-type two-position three-way valve (16) are all connected to the gas distribution pipe (62).

2. The pneumatic control system for a button-attaching machine according to claim 1, characterized in that: The elastic component (46) includes two compression springs (461), both of which are sleeved on the actuating rod (43). A contact member is fixed in the middle of the actuating rod (43). The ends of the two compression springs (461) that are close to each other abut against the contact member, and the ends of the two compression springs (461) that are far apart abut against the sliding bracket.

3. The pneumatic control system for a button-attaching machine according to claim 2, characterized in that: The sliding bracket is a sliding sleeve (42), and the trigger rod (43) and the two compression springs (461) are all located inside the sliding sleeve (42).

4. The pneumatic control system for a button-attaching machine according to claim 3, characterized in that: The first damping element (45) is a spring plunger. The first damping element (45) is fixed on the push-pull bracket (4). The abutment of the first damping element (45) abuts against the sliding sleeve (42).

5. A pneumatic control system for a button-attaching machine according to claim 1, characterized in that: A throttle valve (63) is provided on the side of the gas distribution pipe (62) near the main gas supply pipe (61).

6. A pneumatic control system for a button-attaching machine according to claim 5, characterized in that: It also includes a second two-position five-way valve (6), which is a manual two-position five-way valve, and one of its output ports is connected to the gas supply main pipe (61); A vent pipe (51) is connected between the rod chamber of the push-pull cylinder (11) and the corresponding output port of the first two-position five-way valve (5). The vent pipe (51) includes a first pipe section (511) connected to the corresponding output port of the first two-position five-way valve (5) and a second pipe section (512) connected to the rod chamber of the push-pull cylinder (11). A main line or valve (52) is provided between the first pipe section (511) and the second pipe section (512). The other air outlet of the second two-position five-way valve (6) and the first pipe section (511) are respectively connected to the two air inlets of the main line or valve (52). The second pipe section (512) is connected to the air outlet of the main line or valve (52).

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