Novel pneumatic spin riveting machine

Abstract

The embodiment of the utility model discloses a novel pneumatic spin riveting machine which comprises a spin riveting assembly used for rotary riveting and a driving assembly used for driving the spin riveting assembly. The driving assembly comprises a motor and a cylinder, the cylinder drives the spin riveting assembly to axially move, and the motor drives the spin riveting assembly to radially move. The transmission shaft is connected with the motor through the locking ring, so that the concentricity of the connection of the motor and the transmission shaft is better, the stress at the joint is more uniform, and shaking is not easy to generate; the first piston and the second piston are machined separately, the machining cost is lower, the machining requirement is lower, and the interlayer is fixed through the cylinder body isolating ring and the clamping spring and is easy to detach; the piston rod and the second piston are fixedly connected through a screw, a copper sleeve for lubrication is arranged between the lower end cover and the piston rod, the copper sleeve is good in abrasion resistance, sliding performance and self-lubricating performance and not prone to seizure, the spin riveting head is provided with a dustproof cover and a dustproof piece, dust can be prevented from entering the spin riveting head, the rivet rod is not prone to shaking during operation, and the service life of the rivet rod is prolonged. And the service life of the spin riveting head is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of riveting equipment, in particular to a novel pneumatic riveting machine. Background Art

[0002] The rotary riveting machine is a new type of riveting equipment developed based on the cold rolling riveting method. The cold rolling riveting method is a riveting method that uses the rivet rod to locally pressurize the rivet and continuously swing around the center until the rivet is formed. The rotary riveting machine can avoid the problem of the rotary rivet head being easily damaged by the direct contact between the riveting head and the rivet head like the traditional pressure riveting machine or punch riveting machine, resulting in a short life and high cost. The swing riveting of the rotary riveting machine is to gradually extend the local deformation to the whole, so that the rivets or other workpieces to be riveted gradually form regular and firm overall deformation from local deformation, thereby achieving the most ideal riveting effect. It is a process from quantitative change to qualitative change. The rotary riveting machine can rivet objects together with rivets. The rotary riveting machine mainly relies on rotation and pressure to complete the assembly. It is mainly used in occasions where rivets (hollow rivets, hollow rivets, solid rivets, etc.) are required. Common specifications and models include pneumatic, hydraulic and electric, single-head and double-head. The existing ordinary pneumatic riveting machine has a large spindle wobble, and the cylinder body diameter needs to be increased to increase the radial pressure, which will cause the overall volume of the riveting machine to become larger, which is not conducive to the installation of equipment in the automation industry. The riveting effect is poor and there are abnormal noises, which is very time-consuming and labor-intensive, and the work efficiency is extremely low, wasting a lot of human resources, and also causing an increase in the production cost of the enterprise.

[0003] The patent application number 2022203170358 filed by the applicant on February 17, 2022 discloses a pneumatic riveting mechanism, including a cylinder, a first piston, a second piston, a sealing sleeve, a feed air inlet, a return air inlet, a motor, and a rotating mechanism. A partition layer is provided inside the cylinder, and the partition layer divides the cylinder into a first cylinder and a second cylinder. The first piston is arranged in the first cylinder, the second piston is arranged in the second cylinder, the sealing sleeve is arranged at the rear end of the second cylinder, the second piston is sleeved with the sealing sleeve, the feed air inlet and the return air inlet are arranged on the cylinder, the motor is arranged at the end of the cylinder, and the rotating mechanism is rotatably arranged at the front end of the first piston, and passes through the first and second pistons and the sealing sleeve to be connected to the motor. The utility model reasonably utilizes the space inside the cylinder, and the second piston is added to increase the pressure area without expanding the inner diameter of the cylinder and the diameter of the piston rod, thereby improving the feed output force. The riveting effect is better than that of the traditional ordinary pneumatic riveting machine, and a better solution is achieved between its own weight and output force. However, in actual use, since the cylinder of this patent is integrally formed, both ends need to be processed and the concentricity of both ends must be ensured, which has certain requirements on the process and the cost is also high, which is not conducive to widespread promotion and use; the transmission shaft and the rotating shaft are connected by screws, which can easily cause uneven force during operation; there is no dustproof part in the rivet head, and dust is easily drawn in during operation, causing the rivet machine to stop. Utility Model Content

[0004] The technical problem to be solved by the embodiment of the utility model is to provide a new type of pneumatic riveting machine.

[0005] In order to solve the above technical problems, an embodiment of the utility model provides a new type of pneumatic riveting machine, including a riveting assembly for rotary riveting and a driving assembly for driving the riveting assembly; the driving assembly is connected to the riveting assembly, and the driving assembly includes a motor and a cylinder, the motor is fixedly arranged at the upper end of the cylinder, the riveting assembly is arranged at the lower end of the cylinder, the riveting assembly passes through the cylinder and is connected to the motor, a partition is detachably arranged inside the cylinder, the partition divides the cylinder into a first cylinder and a second cylinder, the first cylinder and the second cylinder are respectively airtightly provided with a first piston and a second piston, the cylinder drives the riveting assembly to move axially, and the motor drives the riveting assembly to move radially.

[0006] Wherein, the cylinder includes a cylinder body, an upper end cover and a lower end cover, the upper end cover and the lower end cover are respectively fixedly arranged at the upper and lower ends of the cylinder body, the motor is arranged at the upper end of the upper end cover, the motor and the upper end cover are connected through a motor fixing part, the rivet assembly is arranged at the lower end of the lower end cover, the partition includes a cylinder body isolation ring and a retaining spring arranged on the upper and lower end surfaces of the cylinder body isolation ring, a piston rod is movably arranged in the lower end cover, the piston rod is fixedly connected to the second piston, and a copper sleeve is arranged between the lower end cover and the piston rod.

[0007] The cylinder is provided with a feed air inlet and a return air inlet, and the cylinder body is provided with two first air ports and two second air ports, the two first air ports are connected with the feed air inlet, and the two second air ports are connected with the return air inlet.

[0008] Among them, a piston sleeve is arranged in the cylinder body, the piston sleeve passes through the partition, the upper end of the piston sleeve is movably arranged in the upper end cover, and the first piston is fixedly arranged on the piston sleeve; the first piston divides the upper and lower parts of the first cylinder into a first process chamber and a first return chamber, and the second piston divides the upper and lower parts of the second cylinder into a second process chamber and a second return chamber.

[0009] The two first air ports are respectively arranged in the first process chamber and the second process chamber, and the two second air ports are respectively arranged in the first return chamber and the second return chamber.

[0010] Wherein, the rotary rivet assembly includes a transmission shaft, a rotating shaft, a rotary rivet head and a rivet rod, the transmission shaft is fixedly sleeved on the output end of the motor, a locking ring is provided at the connection between the transmission shaft and the output end of the motor, the transmission shaft is movably sleeved on the upper end of the rotating shaft, the lower end of the rotating shaft is fixedly sleeved on the rotary rivet head, the rivet rod is fixedly arranged in the rotary rivet head, and the motor drives the rotary rivet assembly to rotate.

[0011] The piston sleeve is fixedly connected to the piston rod and has a communicating inner cavity. The piston sleeve is fixedly connected to the rotating shaft and transmits the axial force of the cylinder to the rivet rod. The transmission shaft and the rotating shaft pass through the inner cavity and are connected to the motor and transmit the radial force of the motor to the rivet rod.

[0012] Among them, a first sealing ring is arranged between the upper end cover and the cylinder body, a second sealing ring is arranged between the upper end cover and the piston sleeve, a buffer ring is arranged on the bottom wall of the upper end cover, a third sealing ring is arranged between the first piston, the second piston and the cylinder body, and a fourth sealing ring is arranged between the cylinder isolation ring and the piston sleeve and the cylinder body.

[0013] Among them, the rotary rivet head is obliquely dug with a rotation groove, the rivet rod passes through the dust cover at the opening of the rotation groove and the internal dustproof part, the sixth sealing ring and rests against the load-bearing seat at the inner top, a fifth sealing plug is arranged between the dust cover and the rivet rod, and the rivet rod is fixed in the rotation groove.

[0014] Wherein, the rivet rod is connected to the rotary rivet head via a bearing.

[0015] Implementing the embodiments of the utility model has the following beneficial effects:

[0016] The driving assembly drives the rotary rivet assembly to rotate in the radial direction and to move up and down in the axial direction. An inclined rotation groove is dug inside the rotary rivet head, and the rivet rod contacts the rivet at a set swing angle.

[0017] The transmission shaft and the motor are connected by a locking ring, which has better concentricity, more uniform force at the connection, less prone to shaking, and increased service life; the first piston and the second piston are processed separately, which has lower processing costs and lower processing requirements. The interlayer is fixed by a cylinder isolation ring and a retaining ring, which is easy to disassemble; the piston rod and the second piston are fixed by screws, and a copper sleeve for lubrication is provided between the lower end cover and the piston rod. The copper sleeve has good wear resistance, sliding and self-lubricating properties, and is not prone to biting. The rivet head is provided with a dust cover and a dustproof part to reduce dust from entering the rivet head. The rivet rod is not easy to shake during operation, which increases the service life of the rivet head;

[0018] When the rotary riveting assembly is pressed down as a whole, the internal stress is eliminated, the rivet is prevented from being roughened, bent, deformed, etc., the surface finish of the riveted joint is effectively improved, the rivet head is evenly rolled open, the riveted joint is firm, the work efficiency is improved, the labor intensity of the workers is reduced, the manpower input is greatly reduced, the stability and reliability are improved, and the riveting quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall structure diagram of the embodiment of the utility model;

[0020] Figure 2 It is a cross-sectional view of an embodiment of the utility model;

[0021] Figure 3 It is a cross-sectional view of a cylinder body of an embodiment of the utility model;

[0022] Figure 4 It is a cross-sectional view of a cylinder of an embodiment of the utility model;

[0023] Figure 5 It is a schematic diagram of the structure of the feed air inlet and the first air inlet of an embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the return air inlet and the second air inlet of an embodiment of the utility model;

[0025] Figure 7 It is a schematic diagram of the structure of the connection between the rotating shaft, the piston sleeve and the piston rod of the embodiment of the utility model;

[0026] Figure 8 It is a schematic diagram of the structure of a rotary riveting assembly according to an embodiment of the utility model.

[0027] In the figure:

[0028] 1. Riveting assembly, 2. Driving assembly, 3. Motor, 31. Motor fixing part, 4. Cylinder, 41. Interlayer, 411. Cylinder isolating ring, 4111. Fourth sealing ring, 412. Circlip, 42A. First cylinder, 42A1. First process chamber, 42A2. First return chamber, 42B. Second cylinder, 42B1. Second process chamber, 42B2. Second return chamber, 43. First piston, 44. Second piston, 441. Screw, 45. Feed air inlet, 46. Return air inlet, 47. Cylinder, 471. First air port, 472. Second air port, 473. Piston sleeve, 47 4. The third sealing ring, 475. The fifth sealing ring, 48. The upper end cover, 481. The first sealing ring, 482. The second sealing ring, 483. The buffer ring, 49. The lower end cover, 491. The piston rod, 4911. The first concave position, 4912. The second concave position, 492. The copper sleeve, 5. The transmission shaft, 51. The locking ring, 6. The rotating shaft, 61. The first step position, 62. The first limit bearing, 63. The nut, 64. The second limit bearing, 65. The second step position, 7. The rotary rivet head, 71. The rotating groove, 72. The dust cover, 73. The dustproof part, 74. The sixth sealing ring, 75. The bearing seat, 8. The rivet rod. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0030] like Figures 1 to 7 As shown, a novel pneumatic riveting machine comprises a riveting assembly 1 for rotary riveting and a driving assembly 2 for driving the riveting assembly 1; the driving assembly 2 is connected to the riveting assembly 1, and the riveting assembly 1 comprises a transmission shaft 5, a rotating shaft 6, a riveting head 7 and a rivet rod 8, the transmission shaft 5 is sleeved on the output end of the motor 3, and a locking ring 51 is provided at the connection between the transmission shaft 5 and the output end of the motor 3. The transmission shaft 5 and the motor 3 are connected through the locking ring 51, and the force at the connection is more uniform, and it is not easy to shake, and the service life is increased; the driving assembly 2 comprises a motor 3 and a cylinder 4, and the electric The machine 3 is fixedly arranged at the upper end of the cylinder 4, and the rivet assembly 1 is arranged at the lower end of the cylinder 4. The rivet assembly 1 passes through the cylinder 4 and is connected to the motor 3. A partition 41 is detachably arranged inside the cylinder 4. The partition 41 divides the cylinder 4 into a first cylinder 42A and a second cylinder 42B. The first cylinder 42A and the second cylinder 42B are respectively airtightly provided with a first piston 43 and a second piston 44. The first piston 43 and the second piston 44 are processed separately, which has lower processing costs and lower processing requirements. The cylinder 4 drives the rivet assembly 1 axially, and the motor 3 drives the rivet assembly 1 to move radially. The rivet assembly 1 is driven to rotate in the radial direction and to move up and down in the axial direction by the driving assembly 2.

[0031] like Figures 3 to 6As shown, the cylinder 4 includes a cylinder body 47, an upper end cover 48 and a lower end cover 49, the upper end cover 48 and the lower end cover 49 are fixedly arranged at the upper and lower ends of the cylinder body 47 respectively, the motor 3 is arranged at the upper end of the upper end cover 48, the motor 3 and the upper end cover 48 are connected through the motor fixing member 31, the rivet assembly 1 is arranged at the lower end of the lower end cover 49, and a scale ring for adjustment is arranged on the outer side of the lower end cover 49. A piston sleeve 473 is arranged in the cylinder body 47, the piston sleeve 473 passes through the partition 41, the upper end of the piston sleeve 473 is movably arranged in the upper end cover 48, and the first piston 43 is fixedly arranged on the piston sleeve 473; the first piston 43 divides the first cylinder 42A into a first process chamber 42A1 and a first return chamber 42A2, and the second piston 44 divides the second cylinder 42B into a second process chamber 42B1 and a second return chamber 42B2. The partition 41 includes a cylinder isolating ring 411 and a retaining spring 412 arranged on the upper and lower end surfaces of the cylinder isolating ring 411. The partition is fixed by the cylinder isolating ring 411 and the retaining spring 412 and is easy to disassemble; a piston rod 491 is movably arranged in the lower end cover 49, and the piston rod 491 is fixedly connected to the second piston 44. Preferably, it is fixed by symmetrical screws 441. A copper sleeve 492 for lubrication is arranged between the lower end cover 49 and the piston rod 491. The copper sleeve 492 has good wear resistance, sliding and self-lubricating properties, is not easy to produce a sticking phenomenon, and plays a pipe straightening role on the piston rod 491; the piston sleeve 473 is fixedly connected to the piston rod 491 and has a connected inner cavity, such as Figure 7 and 8As shown, the second step position 65 on the rotating shaft 6 is provided with a second limit bearing 64, and the second limit bearing 64 is inserted into the second recess 4912 at the bottom end of the piston rod 491; the first step position 61 of the rotating shaft 6 is provided with a first limit bearing 62, and the first limit bearing 62 is fixedly arranged in the first recess 4911 at the same time by cooperating with the locked nut 63; the first limit bearing 62, the second limit bearing 64, the first recess 4911, the second recess 4912 and the nut 63 cooperate to make the rotating shaft 6 move synchronously with the second piston 44; the first piston 43 and the second piston 44 drive the piston sleeve 473 and the piston rod 491 to move axially; the rotating shaft 6 moves with the piston sleeve 473 and the piston rod 491; the piston sleeve 473 and the piston rod 491 transmit the axial force to the rotating shaft 6, so that the rivet rod 8 has downward pressure; the transmission shaft 5 and the rotating shaft 6 pass through the inner cavity to connect with the motor 3 and transmit the radial force of the motor 3 to the rivet rod 8. A first sealing ring 481 is provided between the upper end cover 48 and the cylinder body 47, a second sealing ring 482 is provided between the upper end cover 48 and the piston sleeve 473, a buffer ring 483 is provided on the bottom wall of the upper end cover 48, a third sealing ring 474 is provided between the first piston 43, the second piston 44 and the cylinder body 47, a fourth sealing ring 4111 is provided between the cylinder isolation ring 411 and the piston sleeve 473 and the cylinder body 47, a fifth sealing ring 475 is provided between the piston rod 491 and the second piston 44, and a fifth sealing ring 475 is also provided between the piston sleeve 473 and the first piston 43.

[0032] like Figure 5 and 6 As shown, the cylinder 4 is provided with a feed air inlet 45 and a return air inlet 46, and the cylinder body 47 is provided with two first air inlets 471 and two second air inlets 472. The two first air inlets 471 are connected to the feed air inlet 45, and the two second air inlets 472 are connected to the return air inlet 46. The two first air inlets 471 are respectively provided in the first process chamber 42A1 and the second process chamber 42B1, and the two second air inlets 472 are respectively provided in the first return chamber 42A2 and the second return chamber 42B2.

[0033] like Figure 7 As shown, the transmission shaft 5 is movably sleeved on the upper end of the rotating shaft 6, the lower end of the rotating shaft 6 is fixedly sleeved on the rivet head 7, the rivet rod 8 is fixedly arranged in the rivet head 7 through the bearing, and the motor 3 drives the rivet assembly 1 to rotate. The rivet head 7 is obliquely dug with a rotating groove 71, the rivet rod 8 passes through the dust cover 72 at the opening of the rotating groove 71 and the internal dustproof part 73, the sixth sealing ring 74 and abuts against the bearing seat 75 at the inner top, and a fifth sealing plug is arranged between the dust cover 72 and the rivet rod 8. The rivet head 7 is dug with an inclined rotating groove 71, the rivet rod 8 contacts the rivet at a set swing angle, and the rivet rod 8 is fixed in the rotating groove 71. The rivet head 7 is provided with a dust cover 72 and a dustproof part 73 to reduce dust from entering the rivet head 7. The rivet rod 8 is not easy to shake during operation, which greatly increases the service life of the rivet head 7.

[0034] Of course, the above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any modifications made according to the spirit of the main technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. A new type of pneumatic riveting machine, characterized in that: The invention comprises a rotary riveting assembly (1) for rotary riveting and a driving assembly (2) for driving the rotary riveting assembly (1); the driving assembly (2) is connected to the rotary riveting assembly (1); the driving assembly (2) comprises a motor (3) and a cylinder (4); the motor (3) is fixedly arranged at the upper end of the cylinder (4); the rotary riveting assembly (1) is arranged at the lower end of the cylinder (4); the rotary riveting assembly (1) passes through the cylinder (4) and is connected to the motor (3); a partition (41) is detachably arranged inside the cylinder (4); the partition (41) divides the cylinder (4) into a first cylinder (42A) and a second cylinder (42B); a first piston (43) and a second piston (44) are respectively airtightly arranged inside the first cylinder (42A) and the second cylinder (42B); the cylinder (4) drives the rotary riveting assembly (1) to move axially; and the motor (3) drives the rotary riveting assembly (1) to move radially.

2. A new type of pneumatic riveting machine according to claim 1, characterized in that: The cylinder (4) comprises a cylinder body (47), an upper end cover (48) and a lower end cover (49); the upper end cover (48) and the lower end cover (49) are fixedly arranged at the upper and lower ends of the cylinder body (47), respectively; the motor (3) is arranged at the upper end of the upper end cover (48); the motor (3) and the upper end cover (48) are connected via a motor fixing member (31); the rivet assembly (1) is arranged at the lower end of the lower end cover (49); the partition (41) comprises a cylinder isolation ring (411) and a retaining spring (412) arranged at the upper and lower end surfaces of the cylinder isolation ring (411); a piston rod (491) is movably arranged in the lower end cover (49); the piston rod (491) is fixedly connected to the second piston (44); and a copper sleeve (492) is arranged between the lower end cover (49) and the piston rod (491).

3. A new type of pneumatic riveting machine according to claim 2, characterized in that: The cylinder (4) is provided with a feed air inlet (45) and a return air inlet (46); the cylinder body (47) is provided with two first air ports (471) and two second air ports (472); the two first air ports (471) are connected to the feed air inlet (45), and the two second air ports (472) are connected to the return air inlet (46).

4. A new type of pneumatic riveting machine according to claim 3, characterized in that: A piston sleeve (473) is arranged in the cylinder body (47), and the piston sleeve (473) passes through the partition (41). The upper end of the piston sleeve (473) is movably arranged in the upper end cover (48), and the first piston (43) is fixedly arranged on the piston sleeve (473); the first piston (43) divides the first cylinder (42A) into a first process chamber (42A1) and a first return chamber (42A2) at the upper and lower parts, and the second piston (44) divides the second cylinder (42B) into a second process chamber (42B1) and a second return chamber (42B2) at the upper and lower parts.

5. A novel pneumatic riveting machine according to claim 4, characterized in that: The two first air ports (471) are respectively arranged in the first process chamber (42A1) and the second process chamber (42B1), and the two second air ports (472) are respectively arranged in the first return chamber (42A2) and the second return chamber (42B2).

6. A novel pneumatic riveting machine according to claim 4, characterized in that: The rotary rivet assembly (1) comprises a transmission shaft (5), a rotating shaft (6), a rotary rivet head (7) and a rivet rod (8); the transmission shaft (5) is fixedly sleeved on the output end of the motor (3); a locking ring (51) is provided at the connection between the transmission shaft (5) and the output end of the motor (3); the transmission shaft (5) is movably sleeved on the upper end of the rotating shaft (6); the lower end of the rotating shaft (6) is fixedly sleeved on the rotary rivet head (7); the rivet rod (8) is fixedly arranged in the rotary rivet head (7); and the motor (3) drives the rotary rivet assembly (1) to rotate.

7. A novel pneumatic riveting machine according to claim 6, characterized in that: The piston sleeve (473) is fixedly connected to the piston rod (491) and has a communicating inner cavity. The piston sleeve (473) is fixedly connected to the rotating shaft (6) and transmits the axial force of the cylinder (4) to the rivet rod (8). The transmission shaft (5) and the rotating shaft (6) pass through the inner cavity to be connected to the motor (3) and transmit the radial force of the motor (3) to the rivet rod (8).

8. A novel pneumatic riveting machine according to any one of claims 4 to 7, characterized in that: A first sealing ring (481) is provided between the upper end cover (48) and the cylinder body (47), a second sealing ring (482) is provided between the upper end cover (48) and the piston sleeve (473), a buffer ring (483) is provided on the bottom wall of the upper end cover (48), a third sealing ring (474) is provided between the first piston (43), the second piston (44) and the cylinder body (47), and a fourth sealing ring (4111) is provided between the cylinder body isolation ring (411) and the piston sleeve (473) and the cylinder body (47).

9. A novel pneumatic riveting machine according to claim 6, characterized in that: The rotary rivet head (7) is obliquely excavated with a rotation groove (71); the rivet rod (8) passes through a dust cover (72) at the opening of the rotation groove (71), an internal dust cover (73), a sixth sealing ring (74), and abuts against a bearing seat (75) at the inner top; a fifth sealing plug is provided between the dust cover (72) and the rivet rod (8); and the rivet rod (8) is fixed in the rotation groove (71).

10. A novel pneumatic riveting machine according to claim 9, characterized in that: The rivet rod (8) is connected to the rotary rivet head (7) via a bearing.

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