A cylinder with a buffer device

Abstract

The present invention relates to the field of solenoid valves, and specifically to a cylinder with a buffer device, comprising: a cylinder body, a piston rod disposed within the cylinder body, a piston fixedly connected to the piston rod, a front end cover fixedly connected to the front end of the cylinder body and a rear end cover fixedly connected to the rear end, with the free end of the piston rod extending through the front end cover; and a front buffer device, comprising a buffer piston A and a buffer spring A, a coaxially arranged guide post A fixedly connected to the buffer piston A, and a through hole A provided along the length direction between the buffer piston A and the guide post A. The present invention provides buffer air chambers A and B at the front and rear ends of the cylinder, and when the piston moves, the buffer pistons A and B are pushed, and the air within the buffer air chambers A and B is squeezed by the buffer pistons A or B, thereby compressing the buffer springs A or B to decelerate the cylinder and avoid damage to the cylinder due to impact.

Description

Technical Field

[0001] The present invention relates to the field of solenoid valves, and in particular to a cylinder with a buffer device. Background Art

[0002] The pneumatic solenoid valve is one of the solenoid valves commonly used in production. After the pneumatic solenoid valve is usually connected to the air source, the movement of the piston is controlled by the electromagnetic coil, thereby achieving the purpose of inflating the cylinder.

[0003] At present, when using a pneumatic cylinder, it is easy for the piston to hit the front or rear end cover due to the load on the piston rod or the inertial force when the cylinder moves under the pressure of the air pressure.

[0004] In actual use, an external auxiliary device is usually set up for buffering to reduce the impact force. However, the external buffer device often increases the overall installation position, and the buffer device installed inside the cylinder often has a complex structure and cannot achieve effective buffering effect. Summary of the Invention

[0005] The main purpose of the present invention is to provide a cylinder with a buffer device, by arranging buffer air chamber A and buffer air chamber B at the front and rear ends of the cylinder. When the piston moves, the buffer piston A and buffer piston B are pushed, and the air in the buffer air chamber A and buffer air chamber B is squeezed by the buffer piston A or the buffer piston B, thereby compressing the buffer spring A or the buffer spring B to decelerate and avoid impact damage to the cylinder.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A cylinder with a buffer device, comprising:

[0008] A cylinder body, wherein a piston rod is provided in the cylinder body, a piston is fixedly connected to the piston rod, a front end cover is fixedly connected to the front end of the cylinder body, and a rear end cover is fixedly connected to the rear end of the cylinder body, and a free end of the piston rod passes through the front end cover;

[0009] A front buffer device, comprising a buffer piston A and a buffer spring A. The buffer piston A is fixedly connected to a coaxially arranged guide column A. A through hole A is provided at the center of the buffer piston A and the guide column A along the length direction. The piston rod is connected to the through hole A. A buffer air chamber A is formed between the buffer piston A and the front end cover. The buffer spring A is provided between the free end of the guide column A and the front end cover.

[0010] A rear buffer device, comprising a buffer piston B and a buffer spring B. The buffer piston B is fixedly connected to a coaxial guide post B. A through hole B is provided at the center of the buffer piston B and the guide post B along its length. A buffer air chamber B is formed between the buffer piston B and the rear end cover. The buffer spring B is provided between the free end of the guide post B and the rear end cover.

[0011] The front end cover is provided with an air hole A connected to the front end air chamber of the piston, and the rear end cover is provided with an air hole B connected to the rear end air chamber of the piston.

[0012] Furthermore, a mounting groove A is provided on the inner wall of the front end cover near the buffer piston A, and a one-way sealing ring A is provided in the mounting groove A. A vent A and a vent B are provided on the front end cover. The vent A connects the buffer air cavity A with the mounting groove A, and the vent B connects the buffer air cavity A with the buffer air outlet A on the outer wall of the front end cover.

[0013] Furthermore, a regulating valve A is installed in the buffer air outlet A.

[0014] Furthermore, a mounting groove B is provided on the inner wall of the rear end cover near the buffer piston B, a one-way sealing ring B is provided in the mounting groove B, and a vent C and a vent D are provided on the rear end cover. The vent C connects the buffer air cavity B with the mounting groove B, and the vent D connects the buffer air cavity B with the buffer air outlet B on the outer wall of the rear end cover.

[0015] Furthermore, a regulating valve B is installed in the buffer air outlet B.

[0016] Furthermore, the inner wall of the front end cover is symmetrically fixedly connected to a limit pin A, the guide column A is provided with a slide groove A along the length, the limit pin A is inserted into the slide groove A, and the inner wall of the rear end cover is symmetrically fixedly connected to a limit pin B, and the guide column B is provided with a slide groove b along the length.

[0017] Furthermore, a bidirectional sealing ring A is installed on the piston, a bidirectional sealing ring B is installed on the buffer piston A, and a bidirectional sealing ring C is installed on the buffer piston B.

[0018] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0019] 1. The overall structure of this patent is relatively simple to process. Compared with the existing cylinder with a buffer device, this patent does not require a complicated processing procedure and only requires the processing of straight holes. Compared with other special-shaped buffer structures, it is more convenient, simple and quick.

[0020] 1. This patent sets a front buffer device and a rear buffer device. When the cylinder is running, the piston squeezes the buffer piston A in the front buffer device and the buffer piston B in the rear buffer device to achieve the effect of reducing the impact force by squeezing the buffer piston A or the buffer piston B through the buffer spring A and the buffer spring B.

[0021] 2. In order to perform buffering more effectively, a mounting groove A is provided on the front end cover, and a one-way sealing ring A is provided in the mounting groove and sleeved on the guide column A, so that most of the gas entering the air hole A enters the air chamber of the piston through the gap between the piston rod and the through hole A, and a small part can enter the mounting groove A through the one-way sealing ring A, and then enter the buffer air cavity A through the air hole A connecting the mounting groove A and the buffer air cavity A. When air enters the air hole A, the buffer piston A can be effectively pushed to reset under the action of the buffer spring A. When the buffer piston A is squeezed, the gas in the buffer air cavity A can enter the buffer outlet hole A through the air vent B and be discharged, thereby achieving better buffering.

[0022] 3. By installing the regulating valve A, the air outlet volume at the buffer outlet A can be effectively controlled to achieve a better buffering effect.

[0023] Fourth, by setting a mounting groove B on the rear end cover and setting a one-way sealing ring B in it, the one-way sealing ring B is sleeved on the guide column B, so that when air is taken in from the air hole B, most of the air flow is used to push the piston to move, and a small amount of air flow enters the buffer air chamber B through the vent hole C to drive the buffer piston B to reset.

[0024] 5. By setting the limit pin A and the limit pin B, it is ensured that the buffer piston A and the buffer piston B will not rotate during use, thereby ensuring stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the patent structure.

[0026] Figure 2 Schematic diagram of the internal cross-section of the cylinder with the piston rod removed.

[0027] Figure 3 Schematic diagram of the rear end cover structure.

[0028] Figure 4 Schematic diagram of the front end cover structure.

[0029] Figure 5 Schematic diagram of the structure of buffer piston A.

[0030] Figure 6 Schematic diagram of the structure of buffer piston B. Implementation Method

[0031] like Figures 1 to 6As shown, a cylinder with a buffer device includes:

[0032] A cylinder body 10 is provided with a piston rod 101 in the cylinder body 10, a piston 102 is fixedly connected to the piston rod 101, a front end cover 103 is fixedly connected to the front end of the cylinder body 10, and a rear end cover 104 is fixedly connected to the rear end of the cylinder body 10, and the free end of the piston rod 101 passes through the front end cover 103;

[0033] The front buffer device 20 includes a buffer piston A201 and a buffer spring A202. The buffer piston A201 is fixedly connected to a coaxial guide post A2011. The buffer piston A201 and the guide post A2011 are provided with a through hole A2012 in the center along the length direction. The piston rod 101 is connected to the through hole A2012. A buffer air cavity A2013 is formed between the buffer piston A201 and the front end cover 103. The buffer spring A202 is provided between the free end of the guide post A2011 and the front end cover 103.

[0034] The rear buffer device 30 includes a buffer piston B301 and a buffer spring B302. The buffer piston B301 is fixedly connected to a coaxial guide post B3011. The buffer piston B301 and the guide post B3011 have a through hole B3012 provided along the length direction. A buffer air cavity B3013 is formed between the buffer piston B301 and the rear end cover 104. The buffer spring B302 is provided between the free end of the guide post B3011 and the rear end cover 104.

[0035] The front end cover 103 is provided with an air hole A1031 connected to the front end air chamber of the piston 102 , and the rear end cover 104 is provided with an air hole B1041 connected to the rear end air chamber of the piston 102 .

[0036] Furthermore, a mounting groove A1032 is provided on the inner wall of the front end cover 103 near the buffer piston A201. A one-way sealing ring A1033 is disposed in the mounting groove A1032. A vent hole A1034 and a vent hole B1035 are provided on the front end cover 103. The vent hole A1034 connects the buffer air cavity A2013 with the mounting groove A1032, while the vent hole B1035 connects the buffer air cavity A2013 with the buffer air outlet hole A1036 on the outer wall of the front end cover 103. The one-way sealing ring model can be a 15-22-4 one-way sealing ring.

[0037] Furthermore, a regulating valve A1037 is installed in the buffer outlet hole A1036. The regulating valve model can be a throttle valve SL6-01.

[0038] Furthermore, the rear end cover 104 is provided with a mounting groove B1042 on the inner wall near the buffer piston B301, and a one-way sealing ring B1043 is provided in the mounting groove B1042. The rear end cover 104 is provided with a vent C1044 and a vent D1045. The vent C1044 connects the buffer air cavity B3013 with the mounting groove B1042, and the vent D1045 connects the buffer air cavity B3013 with the buffer air outlet B1046 on the outer wall of the rear end cover 104.

[0039] Furthermore, a regulating valve B1047 is installed in the buffer air outlet B1046.

[0040] Furthermore, the inner wall of the front end cover 103 is symmetrically fixedly connected with a limit pin A1038, the guide column A2011 is provided with a slide groove A20111 along the length, and the limit pin A1038 is inserted into the slide groove A20111, the inner wall of the rear end cover 104 is symmetrically fixedly connected with a limit pin B1048, and the guide column B3011 is provided with a slide groove b30111 along the length.

[0041] Furthermore, a bidirectional sealing ring A is installed on the piston 102 , a bidirectional sealing ring B is installed on the buffer piston A201 , and a bidirectional sealing ring C is installed on the buffer piston B301 .

[0042] When used specifically,

[0043] If the piston rod 101 needs to be extended, the air source needs to enter through the air hole B1041, pass through the guide column B3011 and the rear end cover 104, and enter the air chamber at the rear of the piston 102. At the same time, a part of the gas passes through the one-way sealing ring B through the through hole C1044 and enters the buffer air chamber B3013, pushing the buffer piston B301 to move. At the same time, the buffer spring B302 resets. When the piston 102 presses against the buffer piston A201, the buffer piston A201 squeezes the buffer spring A. At the same time, the gas in the buffer air chamber A is discharged from the regulating valve B1047 through the air vent B, and the piston 102 is buffered at the same time.

[0044] If the piston rod 101 is to retract, the air source needs to enter through the air hole A1031, enter through the guide column A2011 and the front end cover 103, and then enter the air chamber in front of the piston 102 through the through hole A2012 and the piston rod 101. At the same time, a part of the gas enters the buffer air cavity A2013 through the air vent A1034 from the one-way sealing ring A, pushing the buffer piston A201 to move. At the same time, the buffer spring A202 resets. When the piston 102 presses against the buffer piston B301, the buffer piston B301 squeezes the buffer spring B. At the same time, the gas in the buffer air cavity B enters the regulating valve B1047 through the air vent D1045 and is discharged, thereby achieving buffering.

[0045] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A cylinder with a buffer device, characterized in that: include, A cylinder body (10), wherein a piston rod (101) is provided in the cylinder body (10), a piston (102) is fixedly connected to the piston rod (101), a front end of the cylinder body (10) is fixedly connected to a front cover (103), and a rear end of the cylinder body (10) is fixedly connected to a rear cover (104), and a free end of the piston rod (101) passes through the front cover (103); A front buffer device (20), the front buffer device (20) comprising a buffer piston A (201) and a buffer spring A (202), the buffer piston A (201) being fixedly connected to a coaxially arranged guide column A (2011), a through hole A (2012) being provided at the center of the buffer piston A (201) and the guide column A (2011) along the length direction, the piston rod (101) being passed through the through hole A (2012), a buffer air cavity A (2013) being formed between the buffer piston A (201) and the front end cover (103), and the buffer spring A (202) being provided between the free end of the guide column A (2011) and the front end cover (103); A rear buffer device (30), the rear buffer device (30) comprising a buffer piston B (301) and a buffer spring B (302), the buffer piston B (301) being fixedly connected to a coaxially arranged guide post B (3011), the buffer piston B (301) and the guide post B (3011) being provided with a through hole B (3012) along the length direction at the center thereof, a buffer air cavity B (3013) being formed between the buffer piston B (301) and the rear end cover (104), and the buffer spring B (302) being provided between the free end of the guide post B (3011) and the rear end cover (104); The front end cover (103) is provided with an air hole A (1031) connected to the front end air chamber of the piston (102), and the rear end cover (104) is provided with an air hole B (1041) connected to the rear end air chamber of the piston (102).

2. A cylinder with a buffer device according to claim 1, characterized in that: The front end cover (103) is provided with a mounting groove A (1032) on the inner wall near the buffer piston A (201), and a one-way sealing ring A (1033) is provided in the mounting groove A (1032). The front end cover (103) is provided with a vent hole A (1034) and a vent hole B (1035), the vent hole A (1034) connects the buffer air cavity A (2013) and the mounting groove A (1032), and the vent hole B (1035) connects the buffer air cavity A (2013) and the buffer air outlet hole A (1036) on the outer wall of the front end cover (103).

3. A cylinder with a buffer device according to claim 2, characterized in that: A regulating valve A (1037) is installed in the buffer air outlet hole A (1036).

4. A cylinder with a buffer device according to claim 1 or 2, characterized in that: The rear end cover (104) is provided with a mounting groove B (1042) on the inner wall near the buffer piston B (301), and a one-way sealing ring B (1043) is provided in the mounting groove B (1042). The rear end cover (104) is provided with a vent hole C (1044) and a vent hole D (1045). The vent hole C (1044) connects the buffer air cavity B (3013) with the mounting groove B (1042), and the vent hole D (1045) connects the buffer air cavity B (3013) with the buffer air outlet hole B (1046) on the outer wall of the rear end cover (104).

5. The cylinder with a buffer device according to claim 4, characterized in that: A regulating valve B (1047) is installed in the buffer air outlet hole B (1046).

6. The cylinder with a buffer device according to claim 1, characterized in that: The inner wall of the front end cover (103) is symmetrically fixedly connected to a limit pin A (1038); the guide column A (2011) is provided with a slide groove A (20111) along its length; the limit pin A (1038) is inserted into the slide groove A (20111); the inner wall of the rear end cover (104) is symmetrically fixedly connected to a limit pin B (1048); and the guide column B (3011) is provided with a slide groove b (30111) along its length.

7. The cylinder with a buffer device according to claim 1, characterized in that: The piston (102) is installed with a bidirectional sealing ring A, the buffer piston A (201) is installed with a bidirectional sealing ring B, and the buffer piston B (301) is installed with a bidirectional sealing ring C.

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