Air control component and impact cylinder

Abstract

The present invention provides an air control component and an impact cylinder, the air control component includes a valve body, a valve cover and a valve core, the valve body has a cavity with an opening at one end, the valve cover covers the opening and is sealed and connected to the valve body, the valve core is arranged in the cavity, a first driving space is formed between the valve core and the valve cover, and a second driving space is formed between the valve core and the bottom wall of the cavity; the valve core reciprocates between a first position and a second position by alternately injecting gas into the first driving space and the second driving space; an air inlet, a first through hole and a second through hole are also arranged on the side wall of the cavity, when the valve core moves to the second position, external gas can enter the cavity from the air inlet and be discharged from the first through hole; when the valve core moves to the first position, external gas can enter the cavity from the air inlet and be discharged from the second through hole. The present invention can adapt to harsh working environments and also has the advantage of long service life.

Description

Technical Field

[0001] The invention relates to the field of pneumatic technology, and in particular to a pneumatic control component and an impact cylinder. Background Art

[0002] Impact cylinder is a special pneumatic device used to provide instant impact force. Generally, impact cylinders are mainly used in rock drilling tools, breakers, impact drills and other tools as main accessories. At present, most impact cylinders are controlled by solenoid valves to achieve reciprocating impact movements. However, in harsh working environments, such as dusty or humid environments, the solenoid valve is easily damaged, which affects the operation of the impact cylinder. The solenoid valve itself also has the disadvantage of a short service life. Summary of the invention

[0003] The purpose of the present invention is to provide an air control component and an impact cylinder, which can adapt to harsh working environments and have the advantage of long service life.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A pneumatic control component comprises a valve body, a valve cover and a valve core;

[0006] The valve body has a cylindrical cavity, the axis of the cavity extends in the vertical direction, and an opening is formed at the top of the valve body, the valve cover covers the opening and is sealed and connected to the valve body;

[0007] The outer contour of the valve core is a cylindrical shape matching the cavity, and a first concave groove and a second concave groove are arranged on the side wall of the valve core. The first concave groove and the second concave groove are both annular and extend along the circumference of the valve core. The first concave groove and the second concave groove are arranged from top to bottom in an axial direction of the valve core. The valve core is arranged in the cavity, and the axis coincides with the axis of the cavity, so that the first concave groove and the second concave groove respectively form a first channel and a second channel isolated from each other with the side wall of the cavity;

[0008] In the axial direction of the cavity, the length of the valve core is smaller than the length of the cavity, so that a first driving space is formed between the top end of the valve core and the valve cover, and a second driving space is formed between the bottom end of the valve core and the bottom wall of the cavity;

[0009] A first control hole is provided on the side wall of the cavity at a position corresponding to the first driving space, and external gas can enter the first driving space through the first control hole to drive the valve core to move along the axis of the cavity from a first position close to the valve cover to a second position away from the valve cover;

[0010] A second control hole is provided on the side wall of the cavity at a position corresponding to the second driving space, and external gas can enter the second driving space through the second control hole to drive the valve core to move from the second position toward the first position along the axis of the cavity;

[0011] An air inlet, a first through hole and a second through hole are also provided on the side wall of the cavity. When the valve core moves to the second position, the second through hole corresponds to the second recessed groove, and the air inlet and the first through hole both correspond to the first recessed groove, so that external air can enter the cavity from the air inlet, flow through the first channel and then be discharged from the first through hole;

[0012] When the valve core moves to the first position, the first through hole corresponds to the first recessed groove, and the air inlet hole and the second through hole both correspond to the second recessed groove, so that external gas can enter the cavity from the air inlet hole and be discharged from the second through hole after flowing through the second channel.

[0013] Preferably, a third through hole is further provided on the side wall of the cavity;

[0014] When the valve core moves to the first position, the third through hole corresponds to the first recessed groove, so that the gas entering the cavity from the first through hole can flow through the first channel and be discharged from the third through hole.

[0015] Preferably, a fourth through hole is further provided on the side wall of the cavity;

[0016] When the valve core moves to the second position, the fourth through hole corresponds to the first recessed groove, so that the gas entering the cavity from the second through hole can flow through the second channel and be discharged from the fourth through hole.

[0017] Preferably, it also includes a driving rod;

[0018] A fifth through hole whose axis coincides with the axis of the cavity is provided on the valve cover, and the drive rod is passed through the fifth through hole and can move axially in the fifth through hole along the fifth through hole, the bottom end of the drive rod abuts against the valve core, and the top end is located outside the fifth through hole and is in a free state.

[0019] Preferably, it also includes a first sealing ring;

[0020] The first sealing ring is sleeved on the driving rod and located in the fifth through hole, so as to seal the gap between the driving rod and the inner wall of the fifth through hole.

[0021] Preferably, a first annular groove extending along the circumference of the fifth through hole is provided on the inner wall of the fifth through hole, and the first sealing ring is located in the first annular groove.

[0022] An impact cylinder, comprising: an air storage cylinder, a partition, a piston cylinder, an end cover, a piston, a piston rod and an air control component with any of the above technical features;

[0023] The gas storage cylinder is a hollow cylindrical body, and its two ends are respectively a first opening end with a first opening and a second opening end with a second opening; the piston cylinder is a hollow cylindrical body, and its two ends are respectively a third opening end with a third opening and a fourth opening end with a fourth opening;

[0024] The axes of the gas storage cylinder and the piston cylinder coincide with each other, the partition is located between the gas storage cylinder and the piston cylinder, the second opening end of the gas storage cylinder is fixedly connected to the partition so that the partition can cover the second opening, and the third opening end of the piston cylinder is fixedly connected to the partition so that the partition can cover the third opening;

[0025] The valve body of the gas control assembly is fixedly connected to the first opening end and covers the first opening, and the first through hole on the valve body corresponds to the first opening, so that the gas in the valve body can enter the inner cavity of the gas storage cylinder through the first through hole;

[0026] The end cover is fixedly connected to the fourth opening end and covers the fourth opening, a sixth through hole whose axis coincides with the axis of the piston cylinder is provided on the partition plate, and a seventh through hole whose axis coincides with the axis of the piston cylinder is provided on the end cover;

[0027] The piston is arranged in the piston cylinder. On a cross section perpendicular to the axis of the piston cylinder, the shape of the piston matches the shape of the inner cavity of the piston cylinder. The piston has an eighth through hole whose axis coincides with the axis of the piston cylinder. The piston is sleeved on the piston rod through the eighth through hole and is fixedly connected to the piston rod. The portion of the piston rod extending from the side of the piston facing the partition is the first rod body, and the portion of the piston rod extending from the side of the piston facing the end cover is the second rod body, and the second rod body is inserted into the seventh through hole.

[0028] When the valve core in the air control assembly moves to the second position, external gas can enter the cavity from the air inlet hole, enter the inner cavity of the air storage cylinder through the first through hole, and act on the end surface of the piston facing the partition through the sixth through hole, so as to drive the piston to drive the piston rod to move from the third position to the fourth position;

[0029] When the piston is located at the third position, the piston abuts against the partition plate, and the first rod body extends into the sixth through hole; when the piston is located at the fourth position, the piston abuts against the end cover, and the first rod body escapes from the sixth through hole;

[0030] A ninth through hole is provided on the surface of the end cover corresponding to the inner cavity of the piston cylinder, and the second through hole is connected to the ninth through hole. When the valve core in the air control component moves to the first position, external gas can enter the cavity from the air inlet hole, flow from the second through hole to the ninth through hole, enter the inner cavity of the piston cylinder through the ninth through hole and act on the end surface of the piston facing the end cover, so as to drive the piston to drive the piston rod to move from the fourth position to the third position.

[0031] Preferably, it also includes a connecting pipe;

[0032] A tenth through hole is provided on the partition, and the inner cavity of the piston cylinder is connected with the inner cavity of the gas storage cylinder through the tenth through hole. The second control hole is provided at a position corresponding to the first opening. The connecting pipe is located in the inner cavity of the gas storage cylinder, and both ends are respectively connected to the tenth through hole and the second control hole, so that the gas in the inner cavity of the piston cylinder can enter the second driving space through the tenth through hole, the connecting pipe and the second control hole in sequence. When the piston is located at the third position, the piston can cover the tenth through hole.

[0033] Preferably, a third through hole is further provided on the side wall of the cavity;

[0034] When the valve core moves to the first position, the third through hole corresponds to the first recessed groove, so that the piston can drive the gas in the inner cavity of the gas storage cylinder to flow through the first through hole, the first channel and be discharged from the third through hole in sequence.

[0035] Preferably, a fourth through hole is further provided on the side wall of the cavity;

[0036] When the valve core moves to the second position, the fourth through hole corresponds to the first recessed groove, so that the piston can drive the gas in the piston cylinder cavity to flow through the ninth through hole, the second through hole, the second channel in sequence and be discharged from the fourth through hole.

[0037] The air control component of the present invention adopts a technical solution that when the valve core moves to the second position, the second through hole corresponds to the second recessed groove, and the air inlet hole and the first through hole both correspond to the first recessed groove, so that external gas can enter the cavity from the air inlet hole and be discharged from the first through hole after passing through the first channel. When the valve core moves to the first position, the first through hole corresponds to the first recessed groove, and the air inlet hole and the second through hole both correspond to the second recessed groove, so that external gas can enter the cavity from the air inlet hole and be discharged from the second through hole after passing through the second channel. The air control component can adapt to harsh working environments and also has the advantage of long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the structure of the air control component (the valve core is located in the first position) in Example 1;

[0039] Figure 2 This is a structural schematic diagram of the air control component (the valve core is located in the second position) in Example 1;

[0040] Figure 3 This is a schematic diagram of the structure of the impact cylinder (the piston is located at the third position) in the second embodiment;

[0041] Figure 4 This is a schematic diagram of the structure of the impact cylinder (the piston is located at the fourth position) in Example 2.

[0042] In the figure: 1-valve body; 2-valve cover; 3-valve core; 4-cavity; 5-first channel; 6-second channel; 7-first drive space; 8-second drive space; 9-first control hole; 10-second control hole; 11-inlet hole; 12-first through hole; 13-second through hole; 14-third through hole; 15-fourth through hole; 16-driving rod; 17-fifth through hole; 18-first sealing ring; 19-first annular groove; 20-second sealing ring; 21-second annular groove; 22-third sealing ring; 23-third Three annular grooves; 24-fourth sealing ring; 25-fourth annular groove; 26-air storage cylinder; 27-partition; 28-piston cylinder; 29-end cover; 30-piston; 31-piston rod; 32-sixth through hole; 33-seventh through hole; 34-eighth through hole; 35-ninth through hole; 36-connecting pipe; 37-tenth through hole; 38-fifth sealing ring; 39-fifth annular groove; 40-linear bearing; 41-sleeve; 42-sixth sealing ring; 43-sixth annular groove; 44-first rod body; 45-second rod body. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the air control assembly and impact cylinder of the present invention are further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] Embodiment 1

[0045] like Figure 1 , 2 As shown, a pneumatic control component includes a valve body 1, a valve cover 2 and a valve core 3. The valve body 1 has a cylindrical cavity 4, the axis of the cavity 4 extends in the vertical direction, and an opening is formed at the top of the valve body 1 (not shown in the figure), and the valve cover 2 covers the opening and is sealed and connected to the valve body 1. The outer contour of the valve core 3 is a cylindrical shape matching the cavity 4, and a first recessed groove (not shown in the figure) and a second recessed groove (not shown in the figure) are arranged on the side wall of the valve core 3. The first recessed groove and the second recessed groove are both annular and extend along the axial direction of the valve core 3. The first recessed groove and the second recessed groove are arranged from top to bottom at intervals along the axial direction of the valve core 3. The valve core 3 is arranged in the cavity 4, and the axis coincides with the axis of the cavity 4, so that the first recessed groove and the second recessed groove respectively form a first channel 5 and a second channel 6 isolated from each other with the side wall of the cavity 4. In the axial direction of the cavity 4, the length of the valve core 3 is smaller than the length of the cavity 4, so that a first driving space 7 is formed between the top end of the valve core 3 and the valve cover 2, and a second driving space 8 is formed between the bottom end of the valve core 3 and the bottom wall of the cavity 4. A first control hole 9 is provided on the side wall of the cavity 4 at a position corresponding to the first driving space 7, and external gas can enter the first driving space 7 through the first control hole 9 to drive the valve core 3 to move along the axis of the cavity 4 from a first position close to the valve cover 2 to a second position away from the valve cover 2. A second control hole 10 is provided on the side wall of the cavity 4 at a position corresponding to the second driving space 8, and external gas can enter the second driving space 8 through the second control hole 10 to drive the valve core 3 to move along the axis of the cavity 4 from the second position to the first position. The side wall of the cavity 4 is also provided with an air inlet 11, a first through hole 12, and a second through hole 13. When the valve core 3 moves to the second position, the second through hole 13 corresponds to the second recessed groove, and the air inlet 11 and the first through hole 12 both correspond to the first recessed groove, so that external air can enter the cavity 4 from the air inlet 11, and flow through the first channel 5 and then be discharged from the first through hole 12. When the valve core 3 moves to the first position, the first through hole 12 corresponds to the first recessed groove, and the air inlet 11 and the second through hole 13 both correspond to the second recessed groove, so that external air can enter the cavity 4 from the air inlet 11, and flow through the second channel 6 and then be discharged from the second through hole 13.

[0046] In actual work, the reciprocating motion of the valve core 3 between the first position and the second position can be achieved by allowing the external gas to enter the first drive space 7 and the second drive space 8 respectively through the first control hole 9 and the second control hole 10 in an alternating manner. When the air control component is used, the first through hole 12 and the second through hole 13 can be connected to two external working air circuits respectively, so that when the valve core 3 reciprocates between the first position and the second position, the air control component can alternately provide airflow to the two working air circuits. For example, when the air control component is applied to the control of the cylinder, the two working air circuits can be connected to the two opposite end faces of the cylinder piston respectively, so as to alternately generate air pressure on the two opposite end faces of the cylinder piston, thereby driving the cylinder piston to reciprocate. The use of such a technical solution can enable the air control component to adapt to harsh working environments, and also has the advantage of a long service life.

[0047] It should be noted that in actual production, Figure 1 , 2 As shown in the figure, it includes a second sealing ring 20, which is sleeved on the valve core 3 and located between the first concave groove and the second concave groove to seal the gap between the outer wall of the valve core 3 and the inner wall of the cavity 4 at this position, so as to prevent the occurrence of gas blowby between the first channel 5 and the second channel 6. In order to ensure the relative stability between the second sealing ring 20 and the valve core 3, as shown in the figure, a second annular groove 21 extending in the circumferential direction can be provided on the outer wall of the valve core 3, and the second annular groove 21 is located between the first concave groove and the second concave groove in the direction of extension along the axis of the valve core 3, and the second sealing ring 20 is provided in the second annular groove 21.

[0048] In the same principle, in order to prevent the first channel 5 and the first driving space 7 from having gas blowby, the following can be done: Figure 1 , 2 As shown in the figure, it includes a third sealing ring 22, which is sleeved on the valve core 3, and in the direction of extension along the axis of the valve core 3, the third sealing ring 22 is located between the first recessed groove and the end of the valve core 3 close to the valve cover 2, so as to seal the gap between the outer wall of the valve core 3 and the inner wall of the cavity 4 at this position. In order to ensure the relative stability between the third sealing ring 22 and the valve core 3, a third annular groove 23 extending in the circumferential direction can be provided on the outer wall of the valve core 3 as shown in the figure, and in the direction of extension along the axis of the valve core 3, the third annular groove 23 is located between the first recessed groove and the end of the valve core 3 close to the valve cover 2, and the third sealing ring 22 is arranged in the third annular groove 23.

[0049] In order to prevent the second channel 6 and the second driving space 8 from having gas blowby, the following can be done: Figure 1 , 2As shown in the figure, it includes a fourth sealing ring 24, which is sleeved on the valve core 3, and in the direction of extension along the axis of the valve core 3, the fourth sealing ring 23 is located between the second recessed groove and the end of the valve core 3 away from the valve cover 2, so as to seal the gap between the outer wall of the valve core 3 and the inner wall of the cavity 4 at this position. In order to ensure the relative stability between the fourth sealing ring 24 and the valve core 3, a fourth annular groove 25 extending in the circumferential direction can be provided on the outer wall of the valve core 3 as shown in the figure, and in the direction of extension along the axis of the valve core 3, the fourth annular groove 25 is located between the first recessed groove and the end of the valve core 3 close to the valve cover 2, and the fourth sealing ring 24 is arranged in the fourth annular groove 25.

[0050] Furthermore, if Figure 1 , 2 As shown, a third through hole 14 is also provided on the side wall of the cavity 4. When the valve core 3 moves to the first position, the third through hole 14 corresponds to the first recessed groove, so that the gas entering the cavity 4 from the first through hole 12 can flow through the first channel 5 and be discharged from the third through hole 14. A fourth through hole 15 is also provided on the side wall of the cavity 4. When the valve core 3 moves to the second position, the fourth through hole 15 corresponds to the first recessed groove, so that the gas entering the cavity 4 from the second through hole 13 can flow through the second channel 6 and be discharged from the fourth through hole 15.

[0051] As an implementation method, Figure 1 , 2 As shown, it also includes a driving rod 16, a fifth through hole 17 whose axis coincides with the axis of the cavity 4 is provided on the valve cover 2, the driving rod 16 is penetrated in the fifth through hole 17, and can move in the fifth through hole 17 along the axial direction of the fifth through hole 17, the bottom end of the driving rod 16 abuts against the valve core 3, and the top end is located outside the fifth through hole 17 and is in a free state. With such a technical solution, the operator can drive the valve core 3 to move from the first position to the second position by pressing the driving rod 16, thereby realizing the manual operation of the air hole device.

[0052] Furthermore, if Figure 1 , 2 As shown, the first sealing ring 18 is also included. The first sealing ring 18 is sleeved on the driving rod 16 and is located in the fifth through hole 17 to seal the gap between the driving rod 16 and the inner wall of the fifth through hole 17. In order to ensure the relative stability between the first sealing ring 18 and the inner wall of the fifth through hole 17, as shown in the figure, a first annular groove 19 extending along the circumference of the fifth through hole 17 can be provided on the inner wall of the fifth through hole 17, and the first sealing ring 18 is located in the first annular groove 19.

[0053] Embodiment 2

[0054] like Figure 3 , 4As shown, an impact cylinder includes: an air storage cylinder 26, a partition plate 27, a piston cylinder 28, an end cover 29, a piston 30, a piston rod 31 and an air control assembly described in the first embodiment (not shown in the figure). The air storage cylinder 26 is a hollow cylindrical body, and the two ends are respectively a first opening end (not shown in the figure) with a first opening (not shown in the figure) and a second opening end (not shown in the figure) with a second opening (not shown in the figure). The piston cylinder 28 is a hollow cylindrical body, and the two ends are respectively a third opening end (not shown in the figure) with a third opening (not shown in the figure) and a fourth opening end (not shown in the figure) with a fourth opening (not shown in the figure). The left end of the air storage cylinder 26 shown in the figure is the first opening end, and the right end is the second opening end. The left end of the piston cylinder 28 is the third opening end, and the right end is the fourth opening end.

[0055] The axes of the gas storage cylinder 26 and the piston cylinder 28 coincide with each other, the partition 27 is located between the gas storage cylinder 26 and the piston cylinder 28, the second opening end of the gas storage cylinder 26 is fixedly connected to the partition 27 so that the partition 27 can cover the second opening, and the third opening end of the piston cylinder 28 is fixedly connected to the partition 27 so that the partition 27 can cover the third opening. The valve body 1 of the air control assembly is fixedly connected to the first opening end and covers the first opening, and the first through hole 12 on the valve body 1 corresponds to the first opening so that the gas in the valve body 1 can enter the inner cavity of the gas storage cylinder 26 through the first through hole 12. The end cover 29 is fixedly connected to the fourth opening end and covers the fourth opening, and a sixth through hole 32 whose axis coincides with the axis of the piston cylinder 28 is provided on the partition 27, and a seventh through hole 33 whose axis coincides with the axis of the piston cylinder 28 is provided on the end cover 29. The piston 30 is arranged inside the piston cylinder 28. On the cross section perpendicular to the axis of the piston cylinder 28, the shape of the piston 30 matches the shape of the inner cavity of the piston cylinder 28. The piston 30 has an eighth through hole 34 whose axis coincides with the axis of the piston cylinder 28. The piston 30 is sleeved on the piston rod 31 through the eighth through hole 34 and is fixedly connected with the piston rod 31. The part of the piston rod 31 extending from the side of the piston 30 facing the partition 27 is the first rod body 44, and the part extending from the side of the piston 30 facing the end cover 29 is the second rod body 45. The second rod body 45 is penetrated in the seventh through hole 33. When the valve core 3 in the air control assembly moves to the second position, the external gas can enter the cavity 4 from the air inlet 11, enter the inner cavity of the air storage cylinder 26 through the first through hole 12, and act on the end face of the piston 30 facing the partition 27 through the sixth through hole 32, so as to drive the piston 30 to drive the piston rod 31 to move from the third position to the fourth position. When the piston 30 is located at the third position, the piston 30 abuts against the partition 27, and the first rod 44 extends into the sixth through hole 32. When the piston 30 is located at the fourth position, the piston 30 abuts against the end cover 29, and the first rod 44 escapes from the sixth through hole 32. A ninth through hole 35 is provided on the surface of the end cover 29 corresponding to the inner cavity of the piston cylinder 28, and the second through hole 13 is connected to the ninth through hole 35. When the valve core 3 in the air control component moves to the first position, the external gas can enter the cavity 4 from the air inlet 11, flow from the second through hole 13 to the ninth through hole 35, enter the inner cavity of the piston cylinder 28 through the ninth through hole 35, and act on the end surface of the piston 30 facing the end cover 29, so as to drive the piston 30 to drive the piston rod 31 to move from the fourth position to the third position.

[0056] By adopting such a technical solution, the valve core 3 can drive the piston 30 to drive the piston rod 31 to make a linear reciprocating motion between the third position and the fourth position by reciprocating motion of the valve core 3 between the first position and the second position. Since the valve body 1 is fixedly connected to the piston cylinder 28 through the air storage cylinder 26 and the partition 27 in turn, the design of the impact cylinder is more compact.

[0057] Furthermore, if Figure 3 , 4 As shown, it also includes a connecting pipe 36. A tenth through hole 37 is provided on the partition plate 27, and the inner cavity of the piston cylinder 28 is connected with the inner cavity of the gas storage cylinder 26 through the tenth through hole 37. The second control hole 10 is provided at a position corresponding to the first opening. The connecting pipe 36 is located in the inner cavity of the gas storage cylinder 26, and both ends are connected to the tenth through hole 37 and the second control hole 10, respectively, so that the gas in the inner cavity of the piston cylinder 28 can enter the second driving space 8 through the tenth through hole 37, the connecting pipe 36 and the second control hole 10 in sequence. When the piston 30 is located at the third position, the piston 30 can cover the tenth through hole 37. That is to say, when the piston 30 is located at the third position, the tenth through hole 37 is in a closed state, and the gas in the inner cavity of the piston cylinder 28 cannot enter the second driving space 8 through the tenth through hole 37. When the piston 30 is located at the fourth position, the tenth through hole 37 is in an open state, and the gas in the inner cavity of the piston cylinder 28 can enter the second driving space 8 through the tenth through hole 37.

[0058] In actual production, you can Figure 3 , 4 As shown in the figure, it includes a fifth sealing ring 38, which is located in the seventh through hole 33 and is sleeved on the second rod 45 to seal the gap between the second rod 45 and the inner wall of the seventh through hole 33, so that the gas in the inner cavity of the piston cylinder 28 can be prevented from leaking out of the seventh through hole 33. In order to ensure the stability between the fifth sealing ring 38 and the inner wall of the seventh through hole 33, as shown in the figure, a fifth annular groove 39 extending in the circumferential direction can be provided on the inner wall of the seventh through hole 33, and the fifth sealing ring 38 is provided in the fifth annular groove 39. At the same time, as shown in the figure, it can also include a linear bearing 40, which is provided in the seventh through hole 33 and the second rod 45 is penetrated in the linear bearing 40, so that the second rod 45 can be ensured to move smoothly in the seventh through hole 33.

[0059] The connection between the piston 30 and the piston rod 31 can be as follows: Figure 3 , 4 As shown in , an internal thread is provided on the inner wall of the eighth through hole 34 on the piston 30 , and an external thread matching the internal thread is provided on the piston rod 31 , so that the piston 20 is threadedly connected to the piston rod 31 .

[0060] As an implementation method. Figure 3 , 4As shown in the figure, it also includes a sleeve 41. The sleeve 41 is sleeved on the first rod body 44. When the piston 30 is located at the third position, the sleeve 41 and the first rod body 44 extend into the sixth through hole 32. When the piston 30 moves from the third position to the fourth position, the sleeve 41 communicates with the first rod body 44 and escapes from the sixth through hole 32. Further, as shown in the figure, it also includes a sixth sealing ring 42, which is arranged in the sixth through hole 32. When the piston 30 is located at the third position, the sixth sealing ring 42 is sleeved on the sleeve 41 to seal the gap between the outer wall of the sleeve 41 and the inner wall of the sixth through hole 32. In order to ensure the stability between the sixth sealing ring 42 and the inner wall of the sixth through hole 32, as shown in the figure, a sixth annular groove 43 extending in the circumferential direction can be arranged on the inner wall of the sixth through hole 32, and the sixth sealing ring 42 is arranged in the sixth annular groove 43. It should be noted that when the piston 30 is located in the third position, the sleeve 41 and the first rod body 44 are both located within the sixth through hole 32. At this time, external gas can enter the cavity 4 from the air inlet hole 11, and then enter the inner cavity of the air storage cylinder 26 through the first through hole 12, and directly act on the end face of the first rod body 44 away from the piston 30, so as to drive the piston rod 31 or the piston 30 to move from the third position toward the fourth position.

[0061] Furthermore, if Figure 3 , 4 As shown, a third through hole 14 is further provided on the side wall of the cavity 4. When the valve core 3 moves to the first position, the third through hole 14 corresponds to the first recessed groove, so that the piston 30 can drive the gas in the inner cavity of the gas storage cylinder 26 to flow through the first through hole 12 and the first channel 5 in sequence and be discharged from the third through hole 14. In this way, it is possible to prevent the gas in the inner cavity of the gas storage cylinder 26 from being unable to be discharged, thereby preventing the piston 30 from moving from the fourth position to the third position.

[0062] Furthermore, if Figure 3 , 4 As shown, a fourth through hole 15 is also provided on the side wall of the cavity 4;

[0063] When the valve core 3 moves to the second position, the fourth through hole 15 corresponds to the first concave groove, so that the piston 30 can drive the gas in the inner cavity of the piston cylinder 28 to flow through the ninth through hole 35, the second through hole 13, the second channel 6 in sequence and be discharged from the fourth through hole 15. In this way, it can be prevented that the gas in the inner cavity of the piston cylinder 28 cannot be discharged, thereby preventing the piston 30 from moving from the third position to the fourth position.

[0064] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An impact cylinder, Features: include: An air storage cylinder (26), a partition plate (27), a piston cylinder (28), an end cover (29), a piston (30), a piston rod (31) and an air control component, wherein the air control component comprises a valve body (1), a valve cover (2) and a valve core (3); The valve body (1) has a cylindrical cavity (4), the axis of the cavity (4) extends in a vertical direction, and an opening is formed at the top end of the valve body (1), the valve cover (2) covers the opening and is sealingly connected to the valve body (1); The outer contour of the valve core (3) is a cylindrical shape matching the cavity (4); a first recessed groove and a second recessed groove are provided on the side wall of the valve core (3); the first recessed groove and the second recessed groove are both annular in shape extending along the circumference of the valve core (3); the first recessed groove and the second recessed groove are spaced from top to bottom along the axial direction of the valve core (3); the valve core (3) is arranged in the cavity (4), and the axis thereof coincides with the axis of the cavity (4), so that the first recessed groove and the second recessed groove respectively form a first channel (5) and a second channel (6) isolated from each other with the side wall of the cavity (4); In the axial direction of the cavity (4), the length of the valve core (3) is smaller than the length of the cavity (4), so that a first driving space (7) is formed between the top end of the valve core (3) and the valve cover (2), and a second driving space (8) is formed between the bottom end of the valve core (3) and the bottom wall of the cavity (4); A first control hole (9) is provided on the side wall of the cavity (4) at a position corresponding to the first drive space (7), and external gas can enter the first drive space (7) through the first control hole (9) to drive the valve core (3) to move along the axis of the cavity (4) from a first position close to the valve cover (2) to a second position away from the valve cover (2); A second control hole (10) is provided on the side wall of the cavity (4) at a position corresponding to the second driving space (8), and external gas can enter the second driving space (8) through the second control hole (10) to drive the valve core (3) to move along the axis of the cavity (4) from the second position toward the first position; An air inlet hole (11), a first through hole (12) and a second through hole (13) are also provided on the side wall of the cavity (4); when the valve core (3) moves to the second position, the second through hole (13) corresponds to the second recessed groove, and the air inlet hole (11) and the first through hole (12) both correspond to the first recessed groove, so that external air can enter the cavity (4) from the air inlet hole (11), flow through the first channel (5) and be discharged from the first through hole (12); When the valve core (3) moves to the first position, the first through hole (12) corresponds to the first recessed groove, and the air inlet hole (11) and the second through hole (13) both correspond to the second recessed groove, so that external air can enter the cavity (4) from the air inlet hole (11), flow through the second channel (6), and then be discharged from the second through hole (13); in, A third through hole (14) is also provided on the side wall of the cavity (4); When the valve core (3) moves to the first position, the third through hole (14) corresponds to the first recessed groove, so that the gas entering the cavity (4) from the first through hole (12) can flow through the first channel (5) and be discharged from the third through hole (14); in, A fourth through hole (15) is also provided on the side wall of the cavity (4); When the valve core (3) moves to the second position, the fourth through hole (15) corresponds to the first recessed groove, so that the gas entering the cavity (4) from the second through hole (13) can flow through the second channel (6) and be discharged from the fourth through hole (15); The gas storage cylinder (26) is a hollow cylindrical body, and its two ends are respectively a first opening end having a first opening and a second opening end having a second opening; the piston cylinder (28) is a hollow cylindrical body, and its two ends are respectively a third opening end having a third opening and a fourth opening end having a fourth opening; The axes of the gas storage cylinder (26) and the piston cylinder (28) coincide with each other, the partition plate (27) is located between the gas storage cylinder (26) and the piston cylinder (28), the second opening end of the gas storage cylinder (26) is fixedly connected to the partition plate (27) so that the partition plate (27) can cover the second opening, and the third opening end of the piston cylinder (28) is fixedly connected to the partition plate (27) so that the partition plate (27) can cover the third opening; The valve body (1) of the gas control component is fixedly connected to the first opening end and covers the first opening, and the first through hole (12) on the valve body (1) corresponds to the first opening, so that the gas in the valve body (1) can enter the inner cavity of the gas storage cylinder (26) through the first through hole (12); The end cover (29) is fixedly connected to the fourth opening end and covers the fourth opening; a sixth through hole (32) having an axis line coincident with the axis line of the piston cylinder (28) is provided on the partition plate (27); and a seventh through hole (33) having an axis line coincident with the axis line of the piston cylinder (28) is provided on the end cover (29); The piston (30) is arranged in the piston cylinder (28); in a cross section perpendicular to the axis of the piston cylinder (28), the shape of the piston (30) matches the shape of the inner cavity of the piston cylinder (28); the piston (30) has an eighth through hole (34) whose axis coincides with the axis of the piston cylinder (28); the piston (30) is sleeved on the piston rod (31) through the eighth through hole (34) and is fixedly connected to the piston rod (31); the portion of the piston rod (31) extending from the side of the piston (30) facing the partition plate (27) is a first rod body (44); the portion of the piston rod (31) extending from the side of the piston (30) facing the end cover (29) plate is a second rod body (45); the second rod body (45) is inserted into the seventh through hole (33); When the valve core (3) in the air control component moves to the second position, external gas can enter the cavity (4) through the air inlet hole (11), enter the inner cavity of the air storage cylinder (26) through the first through hole (12), and act on the end surface of the piston (30) facing the partition (27) through the sixth through hole (32), so as to drive the piston (30) to drive the piston rod (31) to move from the third position to the fourth position; When the piston (30) is located at the third position, the piston (30) abuts against the partition plate (27), and the first rod body (44) extends into the sixth through hole (32); when the piston (30) is located at the fourth position, the piston (30) abuts against the end cover (29), and the first rod body (44) escapes from the sixth through hole (32); A ninth through hole (35) is provided on the surface of the end cover (29) corresponding to the inner cavity of the piston cylinder (28), and the second through hole (13) is connected to the ninth through hole (35). When the valve core (3) in the air control component moves to the first position, external gas can enter the cavity (4) from the air inlet hole (11), flow from the second through hole (13) to the ninth through hole (35), enter the inner cavity of the piston cylinder (28) through the ninth through hole (35), and act on the end surface of the piston (30) facing the end cover (29), so as to drive the piston (30) to drive the piston rod (31) to move from the fourth position to the third position.

2. The impact cylinder according to claim 1, Features: Also includes a connecting pipe (36); A tenth through hole (37) is provided on the partition plate (27), and the inner cavity of the piston cylinder (28) is connected to the inner cavity of the gas storage cylinder (26) through the tenth through hole (37). The second control hole (10) is provided at a position corresponding to the first opening. The connecting pipe (36) is located in the inner cavity of the gas storage cylinder (26), and its two ends are respectively connected to the tenth through hole (37) and the second control hole (10), so that the gas in the inner cavity of the piston cylinder (28) can enter the second driving space (8) through the tenth through hole (37), the connecting pipe (36) and the second control hole (10) in sequence. When the piston (30) is located at the third position, the piston (30) can cover the tenth through hole (37).

3. The impact cylinder according to claim 1 or 2, Features: When the valve core (3) moves to the first position, the third through hole (14) corresponds to the first recessed groove, so that the piston (30) can drive the gas in the inner cavity of the gas storage cylinder (26) to flow through the first through hole (12), the first channel (5) in sequence and be discharged from the third through hole (14).

4. The impact cylinder according to claim 1 or 2, Features: When the valve core (3) moves to the second position, the fourth through hole (15) corresponds to the first recessed groove, so that the piston (30) can drive the gas in the inner cavity of the piston cylinder (28) to flow through the ninth through hole (35), the second through hole (13), the second channel (6) in sequence and be discharged from the fourth through hole (15).

5. The impact cylinder according to claim 1, Features: Also includes a drive rod (16); A fifth through hole (17) is provided on the valve cover (2) and its axis coincides with the axis of the cavity (4). The drive rod (16) is inserted into the fifth through hole (17) and is capable of moving in the fifth through hole (17) along the axial direction of the fifth through hole (17). The bottom end of the drive rod (16) abuts against the valve core (3), and the top end is located outside the fifth through hole (17) and is in a free state.

6. The impact cylinder according to claim 5, Features: Also includes a first sealing ring (18); The first sealing ring (18) is sleeved on the driving rod (16) and is located in the fifth through hole (17) so as to seal the gap between the driving rod (16) and the inner wall of the fifth through hole (17).

7. The impact cylinder according to claim 6, Features: A first annular groove (19) extending along the circumference of the fifth through hole (17) is provided on the inner wall of the fifth through hole (17), and the first sealing ring (18) is located within the first annular groove (19).

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