A forward and reverse air path control component for a rivet gun

Abstract

The present invention discloses a forward and reverse air path control component for a rivet gun, comprising: a distributor, an air motor, a piston, a first sphere, a second sphere and a third sphere, wherein the first sphere is arranged in a first cavity to perform pneumatic plugging of the rear end of the second cavity, the second sphere is arranged in the first cavity to perform pneumatic plugging of the second valve sleeve, the third sphere is arranged in a seventh cavity to perform pneumatic plugging of the eighth cavity, the eighth cavity is provided with a third valve core extending to the rear, the fifth cavity contains a ninth cavity located between the piston and the end cover, and the third valve sleeve is provided with a connecting hole connecting the eighth cavity and the ninth cavity. Through the above manner, the forward and reverse air path control component for a rivet gun described in the present invention is easy to operate, the forward and reverse control of the air motor is flexible, and the first sphere, the second sphere and the third sphere have stable control over the air path.

Description

Technical Field

[0001] The invention relates to the technical field of rivet guns, in particular to a forward and reverse air path control component of a rivet gun. Background Art

[0002] A rivet gun is a tool used to rivet special nuts. When press riveting and expansion riveting are not feasible due to installation space or structural limitations, rivet riveting is often used to fix the nuts.

[0003] According to the type of driving force, rivet guns are divided into electric rivet guns, manual rivet guns and pneumatic rivet guns. Among them, pneumatic rivet guns are low in cost, easy to operate, and are increasingly widely used. The forward and reverse rotation of pneumatic rivet guns is controlled by a valve. For example, the patent with application number 00238343.8 discloses a combined pneumatic rivet machine, which is cumbersome to operate and needs to be improved. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a forward and reverse air path control component for a rivet gun, thereby improving the convenience of operation and enhancing the stability of air path control.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a forward and reverse air path control component of a rivet gun, including: a distributor, a pneumatic motor, a piston, a first sphere, a second sphere and a third sphere, wherein a first cavity is arranged in the distributor, a first air source introduction hole communicating with the inner wall of the first cavity is arranged on the outer circle of the distributor, a second cavity is arranged at the front end of the first cavity, the first sphere is arranged in the first cavity to pneumatically block the rear end of the second cavity, a third cavity is arranged in the distributor in front of the second cavity, a first valve sleeve is arranged in the third cavity, a first valve core pointing to the first sphere is arranged in the first valve sleeve, a first air flow channel communicating with the second cavity and the forward rotation air hole of the pneumatic motor is arranged in the distributor, a fourth cavity is arranged in the distributor at the rear end of the first cavity, a second valve sleeve is arranged in the fourth cavity, the second sphere is arranged in the first cavity to pneumatically block the second valve sleeve, and the distributor is arranged A second air flow passage is provided which connects the fourth cavity and the reversing air hole of the pneumatic motor. A fifth cavity is provided at the rear of the fourth cavity. The piston is provided in the fifth cavity. An end cover located at the rear of the piston is provided in the fifth cavity. A second valve core which penetrates the second valve sleeve and points to the second sphere is provided at the front end of the piston. An annular groove is provided inwardly on the outer circle of the piston. A sixth cavity which communicates with the annular groove is provided in the piston. A third valve sleeve which extends into the end cover is provided at the rear end of the sixth cavity. A seventh cavity which communicates with the sixth cavity is provided in the third valve sleeve. An eighth cavity is provided at the rear of the seventh cavity. The third sphere is provided in the seventh cavity for pneumatic plugging of the eighth cavity. A third valve core which extends to the rear is provided in the eighth cavity. The fifth cavity contains a ninth cavity located between the piston and the end cover. A connecting hole which connects the eighth cavity and the ninth cavity is provided in the third valve sleeve. A second air source introduction hole which communicates with the fifth cavity is provided on the outer side of the distributor.

[0006] In a preferred embodiment of the present invention, the edge of the third cavity is provided with a first exhaust hole communicating with the outside of the distributor.

[0007] In a preferred embodiment of the present invention, a first elastic retaining ring is disposed in the fourth cavity and is located at the rear end of the second valve sleeve.

[0008] In a preferred embodiment of the present invention, the pneumatic motor is disposed in the distributor and located in front of the first valve sleeve, and a through hole pointing to the first valve core is disposed in the pneumatic motor.

[0009] In a preferred embodiment of the present invention, a second elastic retaining ring is provided in the fifth cavity and is located behind the end cover.

[0010] In a preferred embodiment of the present invention, an axial hole and a radial hole are respectively provided in the first valve sleeve and the second valve sleeve.

[0011] In a preferred embodiment of the present invention, when the piston retreats to contact the end cover, the second gas source introduction hole is connected to the annular groove, and after the piston moves forward, the second gas source introduction hole is directly connected to the ninth cavity.

[0012] In a preferred embodiment of the present invention, a spring is provided at the front end of the piston for retreat and reset.

[0013] In a preferred embodiment of the present invention, a second exhaust hole communicating with the outside of the distributor is provided at the front end of the fifth cavity.

[0014] In a preferred embodiment of the present invention, sealing rings are respectively arranged on the first valve core, the second valve core, the first valve sleeve, the second valve sleeve, the third valve sleeve, the end cover and the piston.

[0015] The beneficial effects of the present invention are as follows: the present invention discloses a forward and reverse air path control component for a rivet gun, wherein the first air source introduction hole is always connected to the air source, and the air pressure of the air source is used to make the first sphere and the second sphere move to both sides respectively, so as to realize the self-locking of the first cavity. When the gun head of the rivet gun presses the nut, the trigger rod drives the first valve core to retreat, so that the first sphere releases the lock of the front end of the first cavity, and the air flow enters the first air flow channel through the second cavity, so as to realize the forward rotation of the pneumatic motor. When the third valve core is pressed, the air source switch of the second air source introduction hole is opened, so that the air flow enters the annular groove and the sixth cavity. The third sphere is pushed forward by the third valve core at this time, so that the airflow can enter the third valve sleeve and the ninth cavity, thereby pushing the piston forward, and after moving forward a certain distance, the second air source introduction hole directly supplies air to the ninth cavity, driving the piston and the second valve core to continue to move forward and trigger the second sphere to retreat, releasing the lock of the rear end of the first cavity, and the airflow enters the fourth cavity through the second valve sleeve, thereby utilizing the second air flow channel to send the airflow to the reversing air hole of the pneumatic motor to realize the reversal of the pneumatic motor, which is easy to operate, and the first sphere, the second sphere and the third sphere have stable control over the air path and good durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a structural schematic diagram of a preferred embodiment of a forward and reverse air path control assembly of a rivet gun of the present invention;

[0018] Figure 2 It is a structural schematic diagram of a preferred embodiment of a forward and reverse air path control assembly of a rivet gun of the present invention when it rotates forward;

[0019] Figure 3 It is a structural schematic diagram of a preferred embodiment of a forward and reverse gas path control assembly of a rivet gun according to the present invention when the forward and reverse gas path control assembly is reversed;

[0020] Figure 4 yes Figure 1 Exploded diagram. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1~Figure 4 , the embodiment of the present invention includes:

[0023] like Figure 1~Figure 4 The forward and reverse air path control assembly of the rivet gun shown includes: a distributor 1, an air motor 2, a piston 9, a first sphere 6, a second sphere 7 and a third sphere 8. The distributor 1 is provided with a first cavity 11. The outer circle of the distributor 1 is provided with a first air source introduction hole 26 connected to the inner wall of the first cavity 11. The first air source introduction hole 26 is always connected to an external air source to maintain the air pressure in the first cavity 11.

[0024] The front end of the first cavity 11 is necked to form a second cavity 12 . Under the action of the air pressure in the first cavity 11 , the first sphere 6 is arranged in the first cavity 11 to pneumatically block the rear end of the second cavity 12 .

[0025] The distributor 1 is provided with a third cavity 13 located in front of the second cavity 12, and a first valve sleeve 29 is provided in the third cavity 13. The pneumatic motor 2 is provided in the distributor 1 and in front of the first valve sleeve 29 to limit the first valve sleeve 29, which is convenient for installation. The distributor 1 is provided with a positioning hole 35 located behind the pneumatic motor 2, and a positioning column extending into the positioning hole 35 is provided at the tail of the pneumatic motor 2 to avoid the torsion problem of the pneumatic motor 2. The distributor 1 is provided with a reduction gear 22 located at the front end of the pneumatic motor 2, and the pneumatic motor 2 is used to drive the rotation of the reduction gear 22.

[0026] like Figure 2As shown, the first valve sleeve 29 is provided with a first valve core 3 pointing to the first sphere, and the distributor 1 is provided with a first air flow channel 25 connecting the second cavity 12 and the air hole for the pneumatic motor to rotate forward. The pneumatic motor 2 is provided with a through hole 21 pointing to the first valve core, and a trigger rod 34 is installed in the through hole 21. When the head of the rivet gun presses the nut, the trigger rod 34 is forced to drive the first valve core 3 to retreat, so that the first sphere 6 releases the lock of the front end of the first cavity 11, and the airflow enters the first air flow channel 25 through the second cavity 12, so that the pneumatic motor 2 rotates forward.

[0027] The distributor 1 is provided with a fourth cavity 14 located at the rear end of the first cavity 11, a second valve sleeve 28 is provided in the fourth cavity 14, and the second ball 7 is provided in the first cavity 11 to pneumatically block the second valve sleeve 28, and when the pneumatic motor 2 rotates forward, the sealing of the front end of the second valve sleeve 28 is ensured. The fourth cavity 14 is provided with a first elastic retaining ring 27 located at the rear end of the second valve sleeve 28, which is convenient for installation and prevents the second valve sleeve 28 from loosening.

[0028] The distributor 1 is provided with a second air flow passage connecting the fourth cavity 14 and the air motor reversing air hole, the fifth cavity 15 is provided behind the fourth cavity 14, and the front end of the fifth cavity 15 is provided with a second exhaust hole 24 connected to the outside of the distributor 1. When the air motor 2 rotates forward, the exhaust gas enters the second air flow passage and the fifth cavity 15 through the air motor reversing air hole, and is finally discharged through the second exhaust hole 24.

[0029] The piston 9 is arranged in the fifth cavity 15, and the end cover 10 is arranged in the fifth cavity 15 behind the piston 9. The second elastic retaining ring 31 is arranged in the fifth cavity 15 behind the end cover 10, which is convenient for installation. The fifth cavity 15 contains a ninth cavity 19 between the piston 9 and the end cover 10. The ninth cavity 19 pushes the piston 9 forward after ventilation. The front end of the piston 9 is provided with a spring 30 for retreat and reset, so as to ensure smooth exhaust when the pneumatic motor 2 rotates forward.

[0030] like Figure 3 As shown, the front end of the piston 9 is provided with a second valve core 4 that penetrates the second valve sleeve 28 and points to the second sphere 7. When the piston 9 moves forward, the second valve core 4 triggers the second sphere 7 to move forward, releasing the pneumatic blockage at the front end of the second valve sleeve 28, allowing the airflow to enter the second valve sleeve 28. At the same time, the second valve core 4 blocks the rear end of the second valve sleeve 28, so that the airflow in the second valve sleeve 28 can only enter the fourth cavity 14 and the second air flow channel, and then enter the air motor reversal air hole to achieve the reversal of the air motor 2. The edge of the third cavity 13 is provided with a first exhaust hole that is connected to the outside of the distributor 1. When the air motor 2 is reversed, the exhaust gas enters the third cavity 13 through the first air flow channel 25 and is finally discharged through the first exhaust hole.

[0031] The outer circle of the piston 9 is concavely provided with an annular groove 23, the piston 9 is provided with a sixth cavity 16 connected with the annular groove 23, the outer side of the distributor 1 is provided with a second gas source introduction hole 20 connected with the fifth cavity 15, when the piston 9 retreats to contact with the end cover 10, the second gas source introduction hole 20 is connected with the annular groove 23. When the gas supply switch of the second gas source introduction hole 20 is turned on, the gas flow enters the annular groove 23 through the second gas source introduction hole 20, and then enters the sixth cavity 16.

[0032] The rear end of the sixth cavity 16 is provided with a third valve sleeve 32 extending into the end cover 10, the third valve sleeve 32 is provided with a seventh cavity 17 connected with the sixth cavity 16, the rear of the seventh cavity 17 is necked with an eighth cavity 18, the third sphere 8 is provided in the seventh cavity 17 to perform pneumatic sealing of the eighth cavity 18, the eighth cavity 18 is provided with a third valve core 5 extending to the rear, when the distributor 1 retreats under the action of external force, the outer end of the third valve core 5 contacts and is pressed against the inner wall of the outer cover of the rivet gun, so that the third sphere 8 moves forward and loses the sealing of the eighth cavity 18, so that the airflow in the sixth cavity 16 enters the eighth cavity 18 through the seventh cavity 17.

[0033] The third valve sleeve 32 is provided with a connecting hole connecting the eighth cavity 18 and the ninth cavity 19, so that the airflow in the eighth cavity 18 enters the ninth cavity 19 through the connecting hole, pushing the piston 9 forward. After the piston 9 moves forward, the ninth cavity 19 expands, and the second air source inlet hole 20 is directly connected with the ninth cavity 19, so that the airflow in the second air source inlet hole 20 directly enters the ninth cavity 19, pushing the piston 9 to move forward quickly.

[0034] In order to cooperate with the first sphere 6, the second sphere 7, the first valve core 3 and the second valve core 4 in controlling the gas circuit, the first valve sleeve 29 and the second valve sleeve 28 are respectively provided with axial holes and radial holes, which are beneficial to the blocking and air intake and exhaust of the first valve sleeve 29 and the second valve sleeve 28. The first valve core 3, the second valve core 4, the first valve sleeve 29, the second valve sleeve 28, the third valve sleeve 32, the end cover 10 and the piston 9 are respectively provided with sealing rings 33 to improve the control accuracy of the gas circuit, reduce the problem of air leakage, and improve the structural stability.

[0035] In summary, the forward and reverse air circuit control component of a rivet gun pointed out by the present invention is suitable for the forward and reverse air circuit control of the rivet gun, reduces the switch components of the rivet gun, improves the convenience of operation, has quick action, high work efficiency, and a stable structure, reduces the problem of air leakage, and is conducive to reducing energy consumption.

[0036] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A forward and reverse air circuit control assembly for a rivet gun, characterized in that: include: A distributor, an air motor, a piston, a first sphere, a second sphere and a third sphere, wherein the distributor is provided with a first cavity, a first air source introduction hole connected to the inner wall of the first cavity is provided on the outer circle of the distributor, a second cavity is provided at the front end of the first cavity, the first sphere is provided in the first cavity to perform pneumatic blocking at the rear end of the second cavity, the distributor is provided with a third cavity located in front of the second cavity, a first valve sleeve is provided in the third cavity, a first valve core pointing to the first sphere is provided in the first valve sleeve, a third valve core connecting the second cavity with the positive rotation air hole of the air motor is provided in the distributor An air flow channel, the distributor is provided with a fourth cavity located at the rear end of the first cavity, the fourth cavity is provided with a second valve sleeve, the second sphere is provided in the first cavity to perform pneumatic blocking of the second valve sleeve, the distributor is provided with a second air flow channel connecting the fourth cavity and the reversing air hole of the pneumatic motor, the rear of the fourth cavity is provided with a fifth cavity, the piston is provided in the fifth cavity, the fifth cavity is provided with an end cover located behind the piston, the front end of the piston is provided with a second valve core penetrating the second valve sleeve and pointing to the second sphere, the outer circle of the piston is provided with an annular groove, and the piston is provided with a A sixth cavity connected to the annular groove, a third valve sleeve extending into the end cover is provided at the rear end of the sixth cavity, a seventh cavity connected to the sixth cavity is provided in the third valve sleeve, an eighth cavity is provided at the rear of the seventh cavity, the third sphere is provided in the seventh cavity for pneumatically blocking the eighth cavity, a third valve core extending to the rear is provided in the eighth cavity, the fifth cavity contains a ninth cavity located between the piston and the end cover, a connecting hole connecting the eighth cavity and the ninth cavity is provided in the third valve sleeve, a second air source introduction hole connected to the fifth cavity is provided on the outside of the distributor, and the first A first exhaust hole connected to the outside of the distributor is provided at the edge of the third cavity. When the piston retreats to contact the end cover, the second air source inlet hole is connected to the annular groove. After the piston moves forward, the second air source inlet hole is directly connected to the ninth cavity. A spring is provided at the front end of the piston for retreat and reset. A second exhaust hole connected to the outside of the distributor is provided at the front end of the fifth cavity. When the pneumatic motor reverses, the exhaust gas enters the third cavity through the first air flow channel and is finally discharged through the first exhaust hole. When the pneumatic motor rotates forward, the exhaust gas enters the second air flow channel and the fifth cavity through the reversing air hole of the pneumatic motor and is finally discharged through the second exhaust hole.

2. The forward and reverse air circuit control assembly of the rivet gun according to claim 1, characterized in that: The fourth cavity is provided with a first elastic retaining ring located at the rear end of the second valve sleeve.

3. The forward and reverse air circuit control assembly of the rivet gun according to claim 1, characterized in that: The pneumatic motor is arranged in the distributor and located in front of the first valve sleeve. A through hole pointing to the first valve core is arranged in the pneumatic motor.

4. The forward and reverse air circuit control assembly of the rivet gun according to claim 1, characterized in that: The fifth cavity is provided with a second elastic retaining ring located behind the end cover.

5. The forward and reverse air circuit control assembly of the rivet gun according to claim 1, characterized in that: The first valve sleeve and the second valve sleeve are respectively provided with an axial hole and a radial hole.

6. The forward and reverse air circuit control assembly of the rivet gun according to claim 1, characterized in that: The first valve core, the second valve core, the first valve sleeve, the second valve sleeve, the third valve sleeve, the end cover and the piston are respectively provided with sealing rings.

Images