Push rod shaft

Abstract

The push rod shaft comprises a first air cylinder shaft and a second air cylinder shaft, a buffer assembly is arranged between the first air cylinder shaft and the second air cylinder shaft, the buffer assembly comprises a buffer groove formed in one end of the first air cylinder shaft, and a sealing ring is installed at an opening of the buffer groove; through cooperative arrangement of the sealing ring, the fixing plate, the guide rod and other structures, when the air cylinder is connected with a swing structure, the first air cylinder shaft and the second air cylinder shaft guide the second air cylinder shaft under the action of the guide rod and the sealing ring, and therefore the air cylinder is connected with the swing structure; the second air cylinder shaft is prevented from shaking in the buffer groove, and the problem that when the piston rod body swings, a gap is generated due to shaking between the first piston rod and the second piston rod, gas in the buffer cavity leaks, and the buffer effect is reduced is solved as much as possible.

Description

Technical Field

[0001] The present application relates to the field of cylinders, and in particular to a push rod shaft. Background Art

[0002] The piston rod, also called the push rod shaft or cylinder shaft, is a connecting component that supports the piston in doing work. It is mostly used in oil cylinders and pneumatic cylinder motion actuators. It is a moving component that moves frequently and has high technical requirements.

[0003] The utility model patent with announcement number CN204025233U proposes a piston rod for a cylinder, including a cylindrical piston rod body, the piston rod body including a first piston rod and a second piston rod, the first piston rod is sleeved on the second piston rod and the outer wall of the second piston rod is sealed with the inner wall of the first piston rod, a buffer chamber is provided between the end of the second piston rod and the inner wall of the first piston rod, and the second piston rod has a limiter that can prevent the second piston rod from sliding out of the first piston rod.

[0004] When the piston rod of the cylinder is connected to the swing structure, the piston rod body may shake and create a gap between the first piston rod and the second piston rod when it swings, causing gas leakage in the buffer chamber and reducing the buffer effect. Utility Model Content

[0005] In order to achieve the above objectives, the present application provides a push rod shaft.

[0006] The present application provides a push rod shaft adopting the following technical solution:

[0007] A push rod shaft includes a first cylinder shaft and a second cylinder shaft, a buffer assembly is provided between the first cylinder shaft and the second cylinder shaft, the buffer assembly includes a buffer groove opened at one end of the first cylinder shaft, a sealing ring is installed at the opening of the buffer groove, a side wall of the buffer groove away from the sealing ring is threadedly connected to a fixing plate, one end of the second cylinder shaft is inserted into the buffer groove and fixedly connected to a piston plate, a side wall of one side of the sealing ring is fixedly connected to a plurality of guide rods in an annular array, an end of the guide rod away from the sealing ring passes through the piston plate and is fixedly connected to the fixing plate, and a sealing assembly is provided on the sealing ring for preventing gas leakage in the buffer groove.

[0008] By adopting the above technical solution, when in use, when the first cylinder shaft moves, the buffer groove moves on the second cylinder shaft, so that the piston plate compresses the air in the buffer groove, and the pressure in the buffer groove gradually increases to push the second cylinder shaft to move, providing buffering. When connected with the swinging structure, the first cylinder shaft and the second cylinder shaft guide the second cylinder shaft through the action of the guide rod and the sealing ring to prevent the second cylinder shaft from shaking in the buffer groove, and try to avoid the problem that the piston rod body may shake and create a gap between the first piston rod and the second piston rod when swinging, causing gas leakage in the buffer cavity, resulting in reduced buffering effect.

[0009] Preferably, the sealing assembly includes two bellows sleeved on the second cylinder shaft, two ends of the two bellows are fixedly connected to the sealing ring and the piston plate respectively, and the guide rod is located between the two bellows.

[0010] By adopting the above technical solution, the bellows can prevent the gas in the buffer groove from leaking through the gap between the sealing ring and the first cylinder shaft and the second cylinder shaft, resulting in reduced buffering effect.

[0011] Preferably, a damping spring is fixedly connected to one end of the piston plate away from the second cylinder shaft, and one end of the damping spring away from the piston plate is fixedly connected to the side wall of the fixed plate.

[0012] By adopting the above technical solution, the damping spring can further improve the buffering effect between the first cylinder shaft and the second cylinder shaft, thereby reducing the impact.

[0013] Preferably, a limiting groove is provided at one end of the second cylinder shaft close to the piston plate, a limiting disc is provided in the limiting groove, a limiting rod is provided in the damping spring, one end of the limiting rod is fixedly connected to the side wall of the fixed plate, and the other end of the limiting rod passes through the piston plate and is fixedly connected to the limiting disc.

[0014] By adopting the above technical solution, the extension and contraction length of the damping spring can be limited by the limit rod to prevent the second cylinder shaft from sliding freely in the buffer groove after gas leakage in the buffer groove, stretching the damping spring too long and causing damage to the damping spring.

[0015] Preferably, one end of the second cylinder shaft away from the piston plate is fixedly connected to a connecting block, and a connecting through hole is provided on a side wall of the connecting block.

[0016] By adopting the above technical solution, one end of the second cylinder shaft is conveniently connected to the external device through the connecting block and the connecting through hole.

[0017] Preferably, a plurality of sealing bolts are provided on the side wall of one end of the first cylinder shaft, and the sealing bolts pass through the first cylinder shaft and are threadedly connected to the sealing ring.

[0018] By adopting the above technical solution, the sealing ring and the first cylinder shaft can be disconnected by removing the sealing bolt, and then the second cylinder shaft is rotated to make the piston plate drive multiple guide rods to rotate, and the fixed plate is rotated to disconnect the fixed plate from the first cylinder shaft. The second cylinder shaft can be disconnected from the first cylinder shaft, which is convenient for replacement.

[0019] Preferably, a plurality of accommodating holes are opened on the side wall of one end of the first cylinder shaft, and the sealing bolts are respectively located in the accommodating holes.

[0020] By adopting the above technical solution, the sealing bolt can be hidden through the accommodating hole to prevent the sealing bolt from protruding and affecting operation.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. The present application adopts the coordination arrangement between the sealing ring, the fixing plate and the guide rod. When in use, when the first cylinder shaft moves, the buffer groove moves on the second cylinder shaft, causing the piston plate to compress the air in the buffer groove, so that the pressure in the buffer groove gradually increases to push the second cylinder shaft to move, providing buffering. When connected with the swinging structure, the first cylinder shaft and the second cylinder shaft guide the second cylinder shaft through the action of the guide rod and the sealing ring, preventing the second cylinder shaft from shaking in the buffer groove, and minimizing the problem that the first piston rod and the second piston rod may shake and create a gap between the first piston rod and the second piston rod when the piston rod body swings, causing gas leakage in the buffer chamber and resulting in reduced buffering effect.

[0023] 2. By removing the sealing bolt, the sealing ring and the first cylinder shaft can be disconnected, and then the second cylinder shaft can be rotated to make the piston plate drive multiple guide rods to rotate, and the fixed plate can be rotated to disconnect the fixed plate from the first cylinder shaft. The second cylinder shaft can be disconnected from the first cylinder shaft, which is convenient for replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a push rod shaft according to an embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the explosion structure of the first cylinder shaft and the second cylinder shaft according to an embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of the interior of the connection structure between the first cylinder shaft and the second cylinder shaft according to an embodiment of the present application;

[0027] Figure 4 The embodiment of this application mainly reflects Figure 3 Schematic diagram of the enlarged structure of region A in center.

[0028] Figure numerals: 1. first cylinder shaft; 2. second cylinder shaft; 3. buffer groove; 4. sealing ring; 5. fixing plate; 6. piston plate; 7. guide rod; 8. bellows; 9. damping spring; 10. limit groove; 11. limit plate; 12. limit rod; 13. connecting block; 14. connecting through hole; 15. sealing bolt; 16. receiving hole. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 4 This application is described in further detail.

[0030] The embodiment of the present application discloses a push rod shaft.

[0031] Reference Figure 1 、 Figure 2 and Figure 3 A push rod shaft includes a first cylinder shaft 1 and a second cylinder shaft 2. A buffer assembly is provided between the first cylinder shaft 1 and the second cylinder shaft 2. The buffer assembly includes a buffer groove 3, a sealing ring 4, a fixing plate 5, a piston plate 6 and a guide rod 7.

[0032] The buffer groove 3 is opened at one end of the first cylinder shaft 1, the sealing ring 4 is installed at the opening of the buffer groove 3, the fixed plate 5 is arranged in the buffer groove 3, and the side wall of the fixing plate 5 away from the sealing ring 4 is threadedly connected to the side wall of the buffer groove 3 through a screw, one end of the second cylinder shaft 2 is inserted into the buffer groove 3 and fixedly connected to the piston plate 6, a plurality of guide rods 7 are provided, all of which are fixedly connected to the side wall of the sealing ring 4 and arranged in a circular array, the end of the guide rod 7 away from the sealing ring 4 passes through the piston plate 6 and is fixedly connected to the fixed plate 5, and the sealing ring 4 is provided with a sealing component for preventing gas leakage in the buffer groove 3.

[0033] Reference Figure 3 The sealing assembly includes two bellows 8 sleeved on the second cylinder shaft 2. The two ends of the two bellows 8 are fixedly connected to the sealing ring 4 and the piston plate 6 respectively. The guide rod 7 is located between the two bellows 8. The bellows 8 can prevent the gas in the buffer groove 3 from leaking through the gap between the sealing ring 4 and the first cylinder shaft 1 and the second cylinder shaft 2, resulting in a reduction in the buffering effect.

[0034] Reference Figure 3 The end of the piston plate 6 away from the second cylinder shaft 2 is fixedly connected to a damping spring 9, and the end of the damping spring 9 away from the piston plate 6 is fixedly connected to the side wall of the fixed plate 5. The damping spring 9 can further improve the buffering effect between the first cylinder shaft 1 and the second cylinder shaft 2 and reduce the impact.

[0035] Reference Figure 3, the second cylinder shaft 2 is close to the one end of the piston plate 6 and is provided with a limiting groove 10, the limiting groove 10 is provided with a limiting disc 11, the damping spring 9 is provided with a limiting rod 12, the limiting rod 12 is fixedly connected with the side wall of the fixed plate 5, the other end of the limiting rod 12 penetrates the piston plate 6 and is fixedly connected with the limiting disc 11, the limiting rod 12 can limit the extension length of the damping spring 9, after the gas in the buffer groove 3 leaks, the second cylinder shaft 2 can slide freely in the buffer groove 3, the damping spring 9 is stretched too long, and the damping spring 9 is damaged.

[0036] With reference to Figure 2 , the one end of the second cylinder shaft 2 is fixedly connected with a connecting block 13, the side wall of the connecting block 13 is provided with a connecting through hole 14, the one end of the second cylinder shaft 2 is connected with external devices through the connecting block 13 and the connecting through hole 14.

[0037] With reference to Figure 4 , the side wall of the one end of the first cylinder shaft 1 is provided with a plurality of sealing bolts 15, the sealing bolts 15 penetrate the first cylinder shaft 1 and are screw-connected with the sealing ring 4, the sealing ring 4 and the first cylinder shaft 1 can be disconnected by taking off the sealing bolts 15, then the second cylinder shaft 2 is rotated, the piston plate 6 drives the plurality of guide rods 7 to rotate, the fixed plate 5 is rotated, the fixed plate 5 is disconnected with the first cylinder shaft 1, the second cylinder shaft 2 is disconnected with the first cylinder shaft 1, and the second cylinder shaft 2 is convenient to replace.

[0038] With reference to Figure 4 , the side wall of the one end of the first cylinder shaft 1 is provided with a plurality of containing holes 16, the sealing bolts 15 are located in the containing holes 16, the sealing bolts 15 can be hidden through the containing holes 16, and the sealing bolts 15 are prevented from protruding and affecting operation.

[0039] The implementation principle of a push rod shaft in the embodiment of the present application is as follows: when in use, when the first cylinder shaft 1 moves, the buffer groove 3 moves on the second cylinder shaft 2, so that the piston plate 6 compresses the air in the buffer groove 3, and the pressure in the buffer groove 3 gradually increases to push the second cylinder shaft 2 to move and provide buffering. When connected with the swing structure, the first cylinder shaft 1 and the second cylinder shaft 2 guide the second cylinder shaft 2 through the action of the guide rod 7 and the sealing ring 4 to prevent the second cylinder shaft 2 from shaking in the buffer groove 3, thereby avoiding the piston rod body from shaking as much as possible. During swinging, there may be shaking and gaps between the first piston rod and the second piston rod, causing gas leakage in the buffer chamber, resulting in reduced buffering effect. At the same time, when the first cylinder shaft 1 or the second cylinder shaft 2 needs to be replaced, the sealing ring 4 and the first cylinder shaft 1 can be disconnected by removing the sealing bolt 15, and then the second cylinder shaft 2 is rotated to make the piston plate 6 drive the multiple guide rods 7 to rotate, and the fixed plate 5 is rotated to disconnect the fixed plate 5 from the first cylinder shaft 1, and the second cylinder shaft 2 is disconnected from the first cylinder shaft 1, so as to facilitate replacement.

[0040] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A push rod shaft, comprising a first cylinder shaft (1) and a second cylinder shaft (2), wherein a buffer assembly is provided between the first cylinder shaft (1) and the second cylinder shaft (2), characterized in that: The buffer assembly includes a buffer groove (3) opened at one end of the first cylinder shaft (1), a sealing ring (4) is installed at the opening of the buffer groove (3), a side wall of the buffer groove (3) away from the sealing ring (4) is threadedly connected to a fixing plate (5), one end of the second cylinder shaft (2) is inserted into the buffer groove (3) and fixedly connected to a piston plate (6), a side wall of one side of the sealing ring (4) is fixedly connected to a plurality of guide rods (7) in an annular array, the end of the guide rod (7) away from the sealing ring (4) passes through the piston plate (6) and is fixedly connected to the fixing plate (5), and a sealing assembly for preventing gas leakage in the buffer groove (3) is provided on the sealing ring (4).

2. The push rod shaft according to claim 1, characterized in that: The sealing assembly comprises two bellows (8) sleeved on the second cylinder shaft (2), the two ends of the two bellows (8) being fixedly connected to the sealing ring (4) and the piston plate (6) respectively, and the guide rod (7) being located between the two bellows (8).

3. The push rod shaft according to claim 2, characterized in that: One end of the piston plate (6) away from the second cylinder shaft (2) is fixedly connected to a damping spring (9), and one end of the damping spring (9) away from the piston plate (6) is fixedly connected to the side wall of the fixed plate (5).

4. The push rod shaft according to claim 3, characterized in that: A limiting groove (10) is provided at one end of the second cylinder shaft (2) close to the piston plate (6), and a limiting disk (11) is provided in the limiting groove (10).

5. The push rod shaft according to claim 4, characterized in that: A limiting rod (12) is provided in the damping spring (9), one end of the limiting rod (12) is fixedly connected to the side wall of the fixing plate (5), and the other end of the limiting rod (12) passes through the piston plate (6) and is fixedly connected to the limiting plate (11).

6. The push rod shaft according to claim 5, characterized in that: One end of the second cylinder shaft (2) away from the piston plate (6) is fixedly connected to a connecting block (13), and a connecting through hole (14) is provided on a side wall of the connecting block (13).

7. The push rod shaft according to claim 6, characterized in that: A plurality of sealing bolts (15) are provided on a side wall of one end of the first cylinder shaft (1); the sealing bolts (15) pass through the first cylinder shaft (1) and are threadedly connected to the sealing ring (4).

8. The push rod shaft according to claim 7, characterized in that: A plurality of accommodating holes (16) are provided on a side wall at one end of the first cylinder shaft (1), and the sealing bolts (15) are respectively located in the accommodating holes (16).

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