Three-cylinder squeeze riveter

Abstract

The invention discloses a three-cylinder squeeze riveter, and belongs to the technical field of riveting equipment of metal equipment, the three-cylinder squeeze riveter comprises a working head, one end of the working head is provided with an air cylinder assembly, one end of the air cylinder assembly is provided with a switch assembly, the switch assembly controls the air cylinder assembly to drive the working head to conduct squeeze riveting operation, and the working head comprises two bow frames. The two bow frames are connected with rocker arm structures respectively, the two rocker arm structures are a first rocker arm and a second rocker arm respectively, the middle of the first rocker arm and the middle of the second rocker arm are connected with the same bearing part, the inner side of the bearing part is sleeved with a first bush, and the inner side of the first bush is sleeved with a first pin shaft. The first rocker arm and the second rocker arm are hinged through the bearing piece, the first lining and the first pin shaft. The working head can reduce the difficulty of operation control, can be specially customized according to different requirements of different stations of customers and parameters such as arch height and throat depth of a squeeze riveter, improves the product universality, improves the use comfort, and accords with ergonomics.

Description

Technical Field

[0001] The invention relates to the technical field of riveting equipment for metal equipment, and more specifically to a three-cylinder riveting machine. Background Art

[0002] In aircraft manufacturing, pressure riveting is a connection method with the characteristics of good connection surface quality, small deformation and high connection strength. Therefore, in actual operation, as long as the structural process allows, pressure riveting is preferred. Compared with Russian-style riveting machines, European-style riveting machines have the advantages of large riveting force, good ergonomics, and easy grip.

[0003] At present, in common riveting operations, there are many places that need to be controlled during the operation, which increases the difficulty of control. At the same time, due to different customer requirements for different workstations, riveting machine bow height, throat depth and other parameters, it is necessary to design a variety of riveting gun structures, which greatly reduces the versatility of rivet gun products.

[0004] Therefore, in view of this, the existing structure is studied and improved, and a three-cylinder riveting machine is provided to achieve a more practical purpose. Summary of the invention

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a three-cylinder riveting machine, which can reduce the difficulty of operation control and can customize the working head according to the different requirements of customers for different workstations, bow height, throat depth and other parameters of the riveting machine, thereby improving the versatility of the product, improving the comfort of use and being ergonomic.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] A three-cylinder riveting machine comprises a working head, one end of the working head is provided with a cylinder assembly, one end of the cylinder assembly is provided with a switch assembly, and the switch assembly controls the cylinder assembly to drive the working head to perform riveting operation;

[0010] The working head comprises two arch frames, the two arch frames are respectively connected with rocker arm structures, the two rocker arm structures are respectively a No. 1 rocker arm and a No. 2 rocker arm, the middle parts of the No. 1 rocker arm and the No. 2 rocker arm are connected with the same bearing member, the inner side of the bearing member is sleeved with a No. 1 bushing, the inner side of the No. 1 bushing is sleeved with a No. 1 pin shaft, and the No. 1 rocker arm and the No. 2 rocker arm are hinged by the bearing member, the No. 1 bushing and the No. 1 pin shaft;

[0011] The No. 1 rocker arm is movably connected to two small rollers on the side near the tail end, the two small rollers are arranged side by side, and the inner side of each small roller is sleeved with a No. 2 pin shaft, the No. 2 rocker arm is fixed with a medium roller at the tail end, and the inner side of the medium roller is movably sleeved with a No. 2 bushing, the No. 1 rocker arm and the No. 2 rocker arm are provided with the same support arm at the tail end, the tail end of the No. 1 rocker arm is fixedly welded to the side of the support arm, a plate cover is fixedly provided on the side of the support arm, the plate cover is fixed to the No. 2 bushing, and a plate spring is fixedly provided between the plate cover and the side of the No. 2 rocker arm;

[0012] The cylinder assembly comprises a cylinder structure, the shell of the cylinder structure is fixed to the support arm, a piston rod is connected to the cylinder structure, a first piston and a second piston are fixedly connected to the side of the piston rod near the support arm, and the second piston is closer to the support arm, the first piston and the second piston both slide along the inner wall of the cylinder structure, the end of the piston rod is fixedly connected to a connector, and one end of the connector is hinged with a cone block;

[0013] The switch assembly includes an end cover, which is fixed to the outer shell of the cylinder structure, a No. 1 cylindrical pin is provided on the outer side of the end cover, and a pressure rod is connected through the No. 1 cylindrical pin, a No. 2 cylindrical pin is provided at one end of the pressure rod, and a stop rod is connected through the No. 2 cylindrical pin, and a torsion spring is sleeved on the outer side of the No. 2 cylindrical pin, an internal air path structure of the end cover, and a control button is provided on the end cover, one end of the control button is in contact with the air path structure, and the air path structure is connected to the inside of the cylinder structure.

[0014] Furthermore, a No. 1 flat washer is sleeved on the side surface of the No. 1 pin shaft and near the end position, and a hexagonal thin nut is threadedly connected to the end of the No. 1 pin shaft, and the hexagonal thin nut is placed on the outside of the No. 1 flat washer.

[0015] Furthermore, an elastic retaining ring for the No. 1 shaft is sleeved on the middle part of the side surface of the No. 1 pin shaft and at the contact position with the No. 1 rocker arm and the No. 2 rocker arm.

[0016] Furthermore, a flat washer of grade C is sleeved on the side of the second pin shaft and near the end position;

[0017] A No. 2 flat washer is sleeved on the middle part of the side of the No. 2 pin shaft and at the position in contact with the No. 1 rocker arm.

[0018] Furthermore, the connecting head is provided with a connecting shaft, and is hinged to the cone block through the connecting shaft;

[0019] Both ends of the connecting shaft are sleeved with elastic retaining rings for the second shaft.

[0020] Furthermore, a spring member is fixed between the cone block and the second piston.

[0021] Furthermore, two partitions for dividing the chambers are arranged in the cylinder structure, and the two partitions are arranged in parallel;

[0022] A No. 1 O-ring is provided at the junction between the side of the piston rod and the partition, and at the junction between the cylinder structure housing and the partition;

[0023] A C-shaped opening retaining ring is arranged between the partition away from the cone block and the cylinder structure shell.

[0024] Furthermore, one end of the piston rod away from the cone block is threadedly connected with a locking nut.

[0025] Furthermore, the gas path structure includes a valve sleeve, the interior of which is slidably connected with a valve stem, and the top end of the valve stem is fixed to a control button;

[0026] A No. 2 O-ring is provided at the junction between the valve stem and the valve sleeve, and at the junction between the valve sleeve and the end cover;

[0027] A rotating sleeve is fixedly arranged at the bottom end of the valve sleeve, the valve stem is inserted into the rotating sleeve, and an internal spring is arranged on the side of the valve stem, and a rotating nut is threadedly connected to the outside of the rotating sleeve;

[0028] A No. 3 O-type sealing ring is arranged between the valve sleeve and the rotating nut.

[0029] Furthermore, a sound-absorbing felt is provided at the air port formed between the valve sleeve and the outside;

[0030] The valve sleeve is threadedly connected with a dust cover at a gas port formed outside.

[0031] 3. Beneficial effects

[0032] Compared with the prior art, the advantages of the present invention are:

[0033] In this solution, the three-cylinder riveting machine is composed of a working head, a cylinder assembly, and a switch assembly, wherein the control button cooperates with the air circuit to control the movement of the piston rod, the piston, and the cone block. The roller rolls on the surface of the cone block and causes the rocker arm to rotate counterclockwise around the axis to complete the riveting action. When the control button is released, the button returns to its original position under the action of the spring, and the piston is reset to complete the working stroke and the return stroke. The reversing of the forward and reverse strokes is controlled by the operator through a manual reversing switch, which reduces the difficulty of control. At the same time, the three-cylinder riveting machine can be specially customized for the working head according to the different requirements of customers for different workstations, bow height, throat depth and other parameters of the riveting machine, which improves the versatility of the product, improves the comfort of use, and is ergonomic. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0035] Figure 2 It is a schematic diagram of the plane structure in the present invention;

[0036] Figure 3 It is a front view schematic diagram of the working head in the present invention;

[0037] Figure 4 It is a top view schematic diagram of the working head in the present invention;

[0038] Figure 5 It is a schematic diagram of the planar structure of the cylinder assembly in the present invention;

[0039] Figure 6 A schematic front view of the switch assembly of the present invention Figure 1 ;

[0040] Figure 7 A schematic front view of the switch assembly of the present invention Figure 2 ;

[0041] Figure 8 is a side view schematic diagram of the switch assembly in the present invention;

[0042] Fig. 9 It is a simplified structural schematic diagram of the present invention;

[0043] Fig.10 Schematic diagram of gas path analysis in the present invention Figure 1 ;

[0044] Fig.11 Schematic diagram of gas path analysis in the present invention Figure 2 .

[0045] Description of the numbers in the figure:

[0046] 1. Working head;

[0047] 101. Bow stand;

[0048] 102, rocker arm structure; 1021, rocker arm number one; 1022, rocker arm number two;

[0049] 103, bearing; 104, bushing No. 1;

[0050] 105, No. 1 pin; 1051, No. 1 flat washer; 1052, hexagonal thin nut; 1053, No. 1 elastic retaining ring for shaft;

[0051] 106, small roller;

[0052] 107, No. 2 pin; 1071, flat washer, grade C; 1072, No. 2 flat washer;

[0053] 108, medium roller; 109, No. 2 bushing; 110, support arm; 111, plate cover; 112, leaf spring;

[0054] 2. Cylinder assembly;

[0055] 201, cylinder structure; 2011, partition; 2012, No. 1 O-ring; 2013, C-type open retaining ring;

[0056] 202, piston rod; 203, piston No. 1; 204, piston No. 2;

[0057] 205, connector; 2051, connecting shaft; 2052, elastic retaining ring for No. 2 shaft; 2053, spring part;

[0058] 206, cone block; 2061, locking nut;

[0059] 3. Switch assembly;

[0060] 301, end cover; 302, No. 1 cylindrical pin; 303, pressure rod; 304, No. 2 cylindrical pin; 305, stop rod; 306, torsion spring;

[0061] 307, gas circuit structure; 3071, valve sleeve; 3072, valve stem; 3073, No. 2 O-ring; 3074, rotating sleeve; 3075, internal spring; 3076, rotating nut; 3077, No. 3 O-ring; 3078, silencer felt; 3079, dust cover;

[0062] 308. Control buttons. DETAILED DESCRIPTION

[0063] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0064] Embodiment 1:

[0065] See also Figure 1 - Fig.11 A three-cylinder riveting machine includes a working head 1, one end of the working head 1 is provided with a cylinder assembly 2, one end of the cylinder assembly 2 is provided with a switch assembly 3, the switch assembly 3 controls the cylinder assembly 2 to drive the working head 1 to perform riveting operations, completing a working stroke and a return stroke, and the reversing of the forward and reverse strokes is controlled by the operator through a manual reversing switch, which reduces the difficulty of control.

[0066] The working head 1 includes two arch frames 101, the two arch frames 101 are respectively connected with rocker arm structures 102, the two rocker arm structures 102 are respectively a No. 1 rocker arm 1021 and a No. 2 rocker arm 1022, the middle parts of the No. 1 rocker arm 1021 and the No. 2 rocker arm 1022 are connected with the same bearing member 103, the inner side of the bearing member 103 is sleeved with a No. 1 bushing 104, the inner side of the No. 1 bushing 104 is sleeved with a No. 1 pin 105, and the No. 1 rocker arm 1021 and the No. 2 rocker arm 1022 are hinged through the bearing member 103, the No. 1 bushing 104, and the No. 1 pin 105;

[0067] The first rocker arm 1021 is movably connected to two small rollers 106 at the side near the tail end, the two small rollers 106 are arranged side by side, and the inner side of each small roller 106 is sleeved with a second pin shaft 107, the second rocker arm 1022 is fixed with a medium roller 108 at the tail end, and the inner side of the medium roller 108 is movably sleeved with a second bushing 109, the first rocker arm 1021 and the second rocker arm 1022 are provided with the same support arm 110 at the tail end, the tail end of the first rocker arm 1021 is fixedly welded to the side of the support arm 110, the side of the support arm 110 is fixedly provided with a plate cover 111, the plate cover 111 is fixed to the second bushing 109, and the plate cover 111 and the side of the second rocker arm 1022 are fixedly provided with a plate spring 112;

[0068] When the cone block 206 moves, the middle roller 108 rolls on the surface of the cone block 206 and causes the second rocker arm 1022 to rotate counterclockwise around the bearing member 103 until the bow frame 101 approaches and is pressed, completing the riveting action.

[0069] The cylinder assembly 2 includes a cylinder structure 201, the shell of the cylinder structure 201 is fixed to the support arm 110, a piston rod 202 is connected to the cylinder structure 201, a first piston 203 and a second piston 204 are fixedly connected to the side of the piston rod 202 near the support arm 110, and the second piston 204 is closer to the support arm 110, the first piston 203 and the second piston 204 both slide along the inner wall of the cylinder structure 201, and a connector 205 is fixedly connected to the end of the piston rod 202, and a cone block 206 is hinged at one end of the connector 205;

[0070] When the air pressure in the cylinder structure 201 increases, the piston rod 202, the No. 1 piston 203, the No. 2 piston 204, the connecting head 205, and the cone block 206 move synchronously.

[0071] The switch assembly 3 includes an end cover 301, which is fixed to the outer shell of the cylinder structure 201. A No. 1 cylindrical pin 302 is provided on the outer side of the end cover 301, and a pressure rod 303 is connected through the No. 1 cylindrical pin 302. A No. 2 cylindrical pin 304 is provided at one end of the pressure rod 303, and a blocking rod 305 is connected through the No. 2 cylindrical pin 304. A torsion spring 306 is sleeved on the outer side of the No. 2 cylindrical pin 304, and an internal air path structure 307 of the end cover 301. A control button 308 is provided on the end cover 301, one end of the control button 308 is in contact with the air path structure 307, and the air path structure 307 is connected to the inside of the cylinder structure 201.

[0072] The end cover 301 is connected to the cylinder structure 201 , and an air path is formed between the two. At this time, the hand operates the pressure rod 303 to press down and push the control button 308 downward to control the gas flow in the air path structure 307 and further control the air pressure change in the cylinder structure 201 .

[0073] Embodiment 2:

[0074] Based on the above embodiment 1, further description is given.

[0075] See also Figure 3 and Figure 4 Specifically, a No. 1 flat washer 1051 is sleeved on the side of the No. 1 pin shaft 105 and near the end position, and a hexagonal thin nut 1052 is threadedly connected to the end of the No. 1 pin shaft 105, and the hexagonal thin nut 1052 is placed on the outside of the No. 1 flat washer 1051.

[0076] The hexagonal thin nut 1052 is used in conjunction with the No. 1 flat washer 1051 to prevent the No. 1 pin shaft 105 from being separated from the No. 1 bushing 104 when moving.

[0077] Specifically, an elastic retaining ring 1053 for the No. 1 shaft is sleeved on the middle part of the side of the No. 1 pin shaft 105 and at the contact position with the No. 1 rocker arm 1021 and the No. 2 rocker arm 1022.

[0078] The elastic retaining ring 1053 for the No. 1 shaft is used to strengthen the tight connection between the No. 1 rocker arm 1021, the No. 2 rocker arm 1022 and the No. 1 pin shaft 105.

[0079] Specifically, a flat washer C-level 1071 is sleeved on the side surface of the second pin shaft 107 and near the end position; the flat washer C-level 1071 is used to prevent the second pin shaft 107 from being separated from the small roller 106.

[0080] A second flat washer 1072 is sleeved on the middle part of the side of the second pin shaft 107 and at the position in contact with the first rocker arm 1021 .

[0081] The No. 2 flat washer 1072 is used to strengthen the tight connection between the No. 1 rocker arm 1021 and the No. 2 pin shaft 107 .

[0082] See also Figure 5 Specifically, a connecting shaft 2051 is provided on the connecting head 205, and is hinged to the cone block 206 through the connecting shaft 2051; thus, the connecting head 205 can rotate freely within a certain range.

[0083] Both ends of the connecting shaft 2051 are sleeved with a second shaft elastic circlip 2052. The second shaft elastic circlip 2052 can limit the angle of free rotation.

[0084] Specifically, a spring member 2053 is fixed between the cone block 206 and the second piston 204. The spring member 2053 can further limit the rotation angle and provide a force for the connector 205 to restore the horizontal angle. When the cone block 206 moves, the middle roller 108 rotates due to the friction with the cone block 206. At this time, the cone block 206 can swing within a certain angle to avoid excessive wear of the middle roller 108 due to excessive friction.

[0085] Specifically, two partitions 2011 for dividing the chambers are arranged in the cylinder structure 201 , and the two partitions 2011 are arranged in parallel; the partitions 2011 are used to form a sealed space inside the partitions 2011 .

[0086] A No. 1 O-ring 2012 is provided at the junction between the side of the piston rod 202 and the partition 2011, and at the junction between the cylinder structure 201 shell and the partition 2011;

[0087] A C-shaped open retaining ring 2013 is provided between the partition plate 2011 away from the cone block 206 and the housing of the cylinder structure 201. The design of the No. 1 O-shaped sealing ring 2012 and the C-shaped open retaining ring 2013 can both improve the sealing effect of the isolated sealing space.

[0088] Specifically, one end of the piston rod 202 away from the cone block 206 is threadedly connected with a locking nut 2061. The locking nut 2061 locks the piston rod 202, which can limit the distance that the piston rod 202 moves to the left, and prevents the piston rod 202 from being brought out of the interior of the cylinder structure 201 under the push of gas.

[0089] See also Figure 6 , Figure 7 and Figure 8 Specifically, the air path structure 307 includes a valve sleeve 3071, and the valve sleeve 3071 is slidably connected to the inside of the valve stem 3072, and the top of the valve stem 3072 is fixed to the control button 308; when the valve sleeve 3071 is pressed down, the valve stem 3072 is pressed down synchronously.

[0090] A No. 2 O-ring 3073 is provided at the junction of the valve stem 3072 and the valve sleeve 3071, and at the junction of the valve sleeve 3071 and the end cover 301;

[0091] A rotating sleeve 3074 is fixedly provided at the bottom end of the valve sleeve 3071, the valve stem 3072 is inserted into the rotating sleeve 3074, and an internal spring 3075 is provided on the side of the valve stem 3072, and a rotating nut 3076 is threadedly connected to the outside of the rotating sleeve 3074;

[0092] A No. 3 O-ring 3077 is provided between the valve sleeve 3071 and the rotating nut 3076 .

[0093] At the same time, the above structure ensures the gas flow in the gas path structure 307 and realizes stable gas exchange.

[0094] See also Fig. 9 , Fig.10 and Fig.11 Through the valve sleeve 3071 and the rotating sleeve 3074, four air paths and two cavities A and B are formed.

[0095] During the working stroke, the control button 308 is turned on, and the high-pressure gas enters B through gas path 1. A is connected to the atmosphere through gas path 2. At this time, a pressure difference is generated between the two cavities A and B, pushing the piston to move to the left, and the gas in chamber A is discharged through gas path 2.

[0096] During the return stroke, the button is reset, and high-pressure gas enters from gas path No. 3 inside the button. At this time, A is the high-pressure chamber, and B is connected to the atmosphere through gas path 4 and is the low-pressure chamber, which pushes the piston to the right and finally resets.

[0097] See also Figure 6 , Figure 7 and Figure 8 Specifically, a sound-absorbing felt 3078 is provided at the air port formed between the valve sleeve 3071 and the outside, so as to reduce the noise generated when the gas flows.

[0098] The valve sleeve 3071 is threadedly connected to the air port formed outside with a dust cover 3079. It can play a certain dust-proof effect and prevent dust accumulation from causing air path blockage.

[0099] Example 3

[0100] Based on the above-mentioned Embodiment 1 and Embodiment 2, further description is given.

[0101] According to different requirements of customers for different workstations, bow height, throat depth and other parameters of the riveting machine, the working head 1 can be specially customized, which improves the versatility of the product, improves the comfort of use, and conforms to ergonomics.

[0102] Working principle:

[0103] The end cover 301 is connected to the cylinder structure 201, and an air path is formed between the two. At this time, the hand operates the pressure rod 303 to press down and push the control button 308 downward to control the gas flow in the air path structure 307. When the control button 308 is pressed down, the high-pressure gas enters B from the No. 1 air path and pushes the piston rod 202 to move to the left. Since the piston rod 202, the No. 1 piston 203, the No. 2 piston 204, the connecting head 205, and the cone block 206 are interconnected, the cone block 206 will also move synchronously to the left.

[0104] When the cone block 206 moves, due to the friction between the medium roller 108 and the cone block 206, the medium roller 108 rolls on the surface of the cone block 206, and because the cone block 206 can swing within a certain angle under the restriction of the spring member 2053, excessive wear of the medium roller 108 caused by excessive friction is avoided. In this way, the second rocker arm 1022 rotates counterclockwise around the bearing member 103 until the bow frame 101 is approached and pressed, completing the riveting action.

[0105] After riveting, release the operating pressure rod 303, and under the elastic force of the torsion spring 306, push the control button 308 up and restore the initial position. At this time, high-pressure gas enters from the No. 3 gas path inside the button. At this time, A is the high-pressure chamber, and B is connected to the atmosphere through the gas path 4 and is the low-pressure chamber, which pushes the piston rod 202, the No. 1 piston 203, the No. 2 piston 204, the connecting head 205, and the cone block 206 to move to the right and finally reset.

[0106] In this way, a single riveting operation can be completed, and the entire operation process is simple to operate.

[0107] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A three-cylinder riveting machine, comprising a working head (1), characterized in that: A cylinder assembly (2) is disposed at one end of the working head (1), and a switch assembly (3) is disposed at one end of the cylinder assembly (2), wherein the switch assembly (3) controls the cylinder assembly (2) to drive the working head (1) to perform a riveting operation; The working head (1) comprises two arch frames (101), the two arch frames (101) are respectively connected to rocker arm structures (102), the two rocker arm structures (102) are respectively a first rocker arm (1021) and a second rocker arm (1022), the middle parts of the first rocker arm (1021) and the second rocker arm (1022) are connected to the same bearing member (103), the inner side of the bearing member (103) is sleeved with a first bushing (104), the inner side of the first bushing (104) is sleeved with a first pin shaft (105), and the first rocker arm (1021) and the second rocker arm (1022) are hinged by the bearing member (103), the first bushing (104) and the first pin shaft (105); The first rocker arm (1021) is movably connected to two small rollers (106) at the side near the tail end, the two small rollers (106) are arranged side by side, and the inner side of each small roller (106) is sleeved with a second pin (107), the second rocker arm (1022) is fixed with a medium roller (108) at the tail end, and the inner side of the medium roller (108) is movably sleeved with a second bushing (109), and the first rocker arm (1021) is movably connected to the second pin (107). 21) and the second rocker arm (1022) are provided with the same support arm (110) at the tail end position, the tail end of the first rocker arm (1021) is fixedly welded to the side of the support arm (110), the side of the support arm (110) is fixedly provided with a plate cover (111), the plate cover (111) is fixed to the second bushing (109), and the plate cover (111) and the side of the second rocker arm (1022) are fixedly provided with a plate spring (112); The cylinder assembly (2) comprises a cylinder structure (201), the shell of the cylinder structure (201) is fixed to the support arm (110), the cylinder structure (201) is connected to a piston rod (202), a first piston (203) and a second piston (204) are fixedly connected to the side of the piston rod (202) near the support arm (110), and the second piston (204) is closer to the support arm (110), the first piston (203) and the second piston (204) both slide along the inner wall of the cylinder structure (201), the end of the piston rod (202) is fixedly connected to a connector (205), and one end of the connector (205) is hinged to a cone block (206); The switch assembly (3) comprises an end cover (301), the end cover (301) is fixed to the outer shell of the cylinder structure (201), a No. 1 cylindrical pin (302) is arranged on the outer side surface of the end cover (301), and a pressure rod (303) is connected via the No. 1 cylindrical pin (302), a No. 2 cylindrical pin (304) is arranged at one end of the pressure rod (303), and a blocking rod (305) is connected via the No. 2 cylindrical pin (304), and a torsion spring (306) is sleeved on the outer side of the No. 2 cylindrical pin (304), an internal air path structure (307) of the end cover (301), and a control button (308) is arranged on the end cover (301), one end of the control button (308) is in contact with the air path structure (307), and the air path structure (307) is connected to the inside of the cylinder structure (201).

2. A three-cylinder riveting machine according to claim 1, characterized in that: A No. 1 flat washer (1051) is sleeved on the side of the No. 1 pin shaft (105) and near the end position, and a hexagonal thin nut (1052) is threadedly connected to the end of the No. 1 pin shaft (105), and the hexagonal thin nut (1052) is placed outside the No. 1 flat washer (1051).

3. A three-cylinder riveting machine according to claim 1, characterized in that: An elastic retaining ring (1053) for the first shaft is sleeved on the middle part of the side surface of the first pin shaft (105) and at the position in contact with the first rocker arm (1021) and the second rocker arm (1022).

4. A three-cylinder riveting machine according to claim 1, characterized in that: A flat washer (1071) of grade C is sleeved on the side of the second pin shaft (107) and near the end; A second flat washer (1072) is sleeved on the middle part of the side of the second pin shaft (107) and at the position in contact with the first rocker arm (1021).

5. The three-cylinder riveting machine according to claim 1, characterized in that: The connecting head (205) is provided with a connecting shaft (2051), and is hinged to the cone block (206) via the connecting shaft (2051); Both ends of the connecting shaft (2051) are sleeved with elastic retaining rings (2052) for the second shaft.

6. A three-cylinder riveting machine according to claim 1, characterized in that: A spring member (2053) is fixed between the cone block (206) and the second piston (204).

7. The three-cylinder riveting machine according to claim 1, characterized in that: Two partitions (2011) for dividing the chambers are arranged in the cylinder structure (201), and the two partitions (2011) are arranged in parallel; A No. 1 O-type sealing ring (2012) is provided at the junction between the side surface of the piston rod (202) and the partition (2011), and at the junction between the shell of the cylinder structure (201) and the partition (2011); A C-shaped open retaining ring (2013) is provided between the partition (2011) away from the cone block (206) and the shell of the cylinder structure (201).

8. The three-cylinder riveting machine according to claim 1, characterized in that: One end of the piston rod (202) away from the cone block (206) is threadedly connected with a locking nut (2061).

9. The three-cylinder riveting machine according to claim 1, characterized in that: The gas path structure (307) comprises a valve sleeve (3071), the interior of the valve sleeve (3071) is slidably connected with a valve stem (3072), and the top end of the valve stem (3072) is fixed to a control button (308); A No. 2 O-type sealing ring (3073) is provided at the junction of the valve stem (3072) and the valve sleeve (3071), and at the junction of the valve sleeve (3071) and the end cover (301); A rotating sleeve (3074) is fixedly provided at the bottom end of the valve sleeve (3071), the valve stem (3072) is inserted into the rotating sleeve (3074), and an internal spring (3075) is provided on the side of the valve stem (3072), and a rotating nut (3076) is threadedly connected to the outside of the rotating sleeve (3074); A No. 3 O-type sealing ring (3077) is provided between the valve sleeve (3071) and the rotating nut (3076).

10. A three-cylinder riveting machine according to claim 9, characterized in that: A sound-absorbing felt (3078) is provided at the air port formed between the valve sleeve (3071) and the outside; The valve sleeve (3071) is threadedly connected to a gas port formed outside with a dust cover (3079).

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