Pneumatic motor with quick reversing response

Abstract

The pneumatic motor comprises a cylinder body and a reversing valve arranged on the cylinder body, the cylinder body comprises a first reversing cavity and a second reversing cavity, the reversing valve comprises a valve body and a valve element sliding in the valve body, the valve body is provided with a first reversing air channel and a second reversing air channel, and the first reversing air channel and the second reversing air channel are communicated with the first reversing cavity and the second reversing cavity respectively. A first gas injection port and a gas outlet are formed in the reversing valve, the first gas injection port is communicated with the valve body, and when the valve element controls the first gas injection port to be communicated with the first reversing gas channel, the second reversing cavity is communicated with the gas outlet, and vice versa; an auxiliary reversing module is further arranged on the cylinder body, and the auxiliary reversing module can apply acting force enabling the valve element to be leftward or rightward to the valve element. According to the scheme, the auxiliary reversing module is independently arranged and used for increasing the constant acting force enabling the valve element to slide in the valve body to the valve element during reversing, so that it is guaranteed that the valve element can smoothly move in the valve body, and the problem that reversing cannot be achieved due to the fact that the valve element is stuck in the valve body is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of pneumatic motors, and particularly relates to a pneumatic motor with rapid commutation response. Background Art

[0002] A pneumatic motor, also known as a pneumatic motor, refers to a device that converts the pressure energy of compressed air into rotational or linear motion.

[0003] Taking the piston-type pneumatic motor as an example, the commutation methods of the piston-type pneumatic motor mainly include three types: First, commutation is carried out through a solenoid valve; Second, commutation is carried out through a double air control valve; Third, commutation is carried out through a single air path control valve core;

[0004] Among them, in the pneumatic motor with solenoid valve commutation, affected by the transmission of the solenoid valve's electrical signal, the self-suction force of the solenoid valve, the friction between the valve core and the valve body, etc., there will be a problem of long commutation response time during the commutation process of the pneumatic motor; among them, in the scheme of commutation by a double air control valve, it is necessary to separately control one air control valve to control the other air control valve. This scheme involves the displacement of a total of two valve cores in two pneumatic valves, resulting in a long commutation response time; among them, the scheme of commutation by a single air path control valve core can refer to the content disclosed in the patent with the publication number CN219432033U. In this scheme, the magnitude of the commutation driving force of the valve core depends on the magnitude of the gas pressure injected into the injection port. Especially when facing a low-speed moving motor, the gas pressure filled is small, and under the influence of factors such as the friction between the valve core and the valve body, it is easy to have the problem of jamming of the valve core and the valve body.

[0005] Therefore, it is necessary to design a new scheme to solve one or more problems existing in the above schemes. Summary of the Invention

[0006] The purpose of the present invention is to provide a pneumatic motor with rapid commutation response to solve the problems raised in the above background art.

[0007] To achieve the above purpose, a technical solution adopted by the present invention is: A pneumatic motor with rapid commutation response, including a cylinder block and a commutation valve placed thereon. The cylinder block includes a first commutation chamber and a second commutation chamber. The commutation valve includes a valve body and a valve core sliding therein. The valve body is provided with a first commutation air passage and a second commutation air passage respectively communicating with the first commutation chamber and the second commutation chamber. The commutation valve is provided with an injection port one and an air outlet. The injection port one is communicated with the valve body. When the valve core controls the injection port one to be communicated with the first commutation air passage, the second commutation chamber is communicated with the air outlet. When the commutation valve controls the injection port one to be communicated with the second commutation air passage, the first commutation chamber is communicated with the air outlet. An auxiliary commutation module is provided on the cylinder block. The auxiliary commutation module is placed at the end of the valve core and can apply a force to the valve core to make it move left or right.

[0008] Preferably, the auxiliary commutation module includes a second air injection port, a first auxiliary commutation air passage, and a second auxiliary commutation air passage. The first auxiliary commutation air passage and the second auxiliary commutation air passage are respectively disposed at both ends of the valve core, and can inject gas through the second air injection port to apply pressure to the valve core to make it slide in the valve body. The valve body is provided with an exhaust passage one and an exhaust passage two for respectively discharging the gas injected from the second air injection port. A valve one and a valve two are respectively arranged at the exhaust passage one and the exhaust passage two. The pneumatic motor further includes a valve switch assembly for opening or closing the valve one and the valve two.

[0009] Preferably, a piston is arranged in the cylinder body. The piston divides the cylinder body into a first commutation chamber and a second commutation chamber. The valve one is arranged in the first commutation chamber, and the valve two is arranged in the second commutation chamber;

[0010] When the piston abuts against the valve one, the valve one opens the exhaust passage one;

[0011] When the piston abuts against the valve two, the valve two opens the exhaust passage two.

[0012] Preferably, valve return members are arranged at both the valve one and the valve two. When the piston separates from the valve one or the valve two, the valve return members control the valve one or the valve two to close the exhaust passage one and the exhaust passage two respectively.

[0013] Preferably, the valve one includes a first valve housing and a first abutting member. An exhaust port one is formed on the cylinder body. The exhaust port one and the exhaust passage one are both communicated with the valve housing. The piston abuts against the first abutting member to make the exhaust passage one and the exhaust port one communicate with each other; when the piston separates from the first abutting member, the return member controls the first abutting member to separate the exhaust passage one and the exhaust port one;

[0014] The valve two has the same structure as the valve one.

[0015] Preferably, the air outlet includes a first air outlet and a second air outlet. The first air outlet is communicated with the first commutation chamber through a first commutation air passage, and the second air outlet is communicated with the second commutation chamber through a second commutation air passage;

[0016] When the valve core controls the first air injection port to communicate with the first commutation air passage, the second commutation chamber is communicated with the second air outlet. At the same time, the valve core cuts off the communication relationship between the first air outlet and the first commutation air passage;

[0017] When the valve core controls the first air injection port to communicate with the second commutation air passage, the first commutation chamber is communicated with the first air outlet. At the same time, the valve core cuts off the communication relationship between the second air outlet and the second commutation air passage.

[0018] Preferably, ferromagnetic materials / magnets are provided at both ends of the valve body, and magnets / ferromagnetic materials for cooperating with the ferromagnetic materials / magnets are provided at both ends of the valve core.

[0019] Advantages of the present invention: In this solution, an auxiliary commutation module is separately provided to apply a constant force for sliding the valve core in the valve body during commutation, so as to ensure the smooth movement of the valve core in the valve body and avoid the problem of being stuck in the valve body and unable to commutate.

[0020] Among them, the scheme of applying a force to the valve core by injecting gas in the auxiliary commutation module can make the pressure of the input gas controllable, effectively ensuring the movement effect of the valve core in the valve body.

[0021] Among them, the communication between the first exhaust passage and the first exhaust port is realized by the contact of the piston with the first abutting member, so that the movement process of the piston can directly control the commutation action of the valve core. And in this pneumatic commutation scheme, when the first exhaust passage and the first exhaust port are communicated, the pressure balance state of the first auxiliary commutation airway and the auxiliary commutation airway is broken, thereby realizing a rapid commutation action and effectively improving the commutation response speed.

[0022] Among them, by respectively providing ferromagnetic materials or magnets at both ends of the valve body and the valve core, after the valve core is commutated, the problem that the downward movement of the valve core in the valve body due to factors such as its own gravity affects the movement of the piston can be avoided. Description of the Drawings

[0023] Figure 1 is the overall structural schematic diagram of the present invention;

[0024] Figure 2 is the first cross-sectional view of the present invention;

[0025] Figure 3 is the first cross-sectional view of the valve body in the present invention;

[0026] Figure 4 is the first cross-sectional view of the auxiliary commutation seat in the present invention;

[0027] Figure 5 is the cross-sectional view of the valve body and the auxiliary commutation seat in the present invention;

[0028] Figure 6 is the second cross-sectional view of the present invention;

[0029] Figure 7 is the structural schematic diagram of the top surface of the auxiliary commutation seat in the present invention;

[0030] Figure 8 is the second cross-sectional view of the valve body in the present invention;

[0031] Figure 9It is the third cross-sectional view of the present invention;

[0032] Figure 10 It is the cross-sectional view of Valve 1 in the present invention;

[0033] In the figure: 1. Cylinder block; 101. First cylinder head; 102. Second cylinder head; 103. First commutation chamber; 104. Second commutation chamber; 2. Valve body; 3. Spool; 4. First commutation air passage; 5. Second commutation air passage; 6. First air injection port;

[0034] 7. Air outlet; 701. First air outlet; 702. Second air outlet; 8. Piston; 9. Auxiliary commutation seat; 10. Second air injection port; 11. First auxiliary commutation air passage; 12. Second auxiliary commutation air passage; 13. First exhaust passage; 14. Second exhaust passage; 15. First auxiliary boost chamber; 16. Second auxiliary boost chamber; 17. First valve housing; 18. First abutting member; 19. First reset member; 20. Second valve housing; 21. Second abutting member; 22. Second reset member; 23. First exhaust port; 24. Second exhaust port; 25. Cover plate; 2501. First through hole; 2502. Second through hole; 2503. Third through hole; 2504. Fourth through hole; 2505. Fifth through hole; 2506. Sixth through hole; 26. First connecting hole; 27. Second connecting hole; 28. Connecting passage; 29. Ferromagnetic substance; 30. Magnet. Detailed implementation manners

[0035] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0036] Embodiment:

[0037] First, an explanation is made for the accompanying drawings of the specification. In the drawings, the thick lines indicate the respective channels through which the gas flows, and there are reference numerals on them for indication.

[0038] Refer to Figure 1 , Figure 2 , Figure 3, A pneumatic motor with fast commutation response, comprising a cylinder block 1 and a commutation valve disposed thereon. Cylinder heads one 101 and two 102 are respectively arranged at both ends of the cylinder block 1 to form a sealed structure for the cylinder block 1. The cylinder block 1 includes a first commutation chamber 103 and a second commutation chamber 104. The commutation valve includes a valve body 2 and a valve core 3 that slides therein. The valve core 3 and the valve body 2 each form an auxiliary boosting chamber at both ends of the valve core 3. The valve body 2 is provided with a first commutation air passage 4 and a second commutation air passage 5 that are respectively connected to the first commutation chamber 103 and the second commutation chamber 104. An air injection port one 6 and an air outlet 7 are provided on the commutation valve. The air injection port one 6 is connected to the valve body 2. When the valve core 3 controls the connection between the air injection port one 6 and the first commutation air passage, the second commutation chamber 104 is connected to the air outlet 7. When the commutation valve controls the connection between the air injection port one and the second commutation air passage, the first commutation chamber 103 is connected to the air outlet 7. An auxiliary commutation module is provided on the cylinder block 1. The auxiliary commutation module is disposed at the end of the valve core 3 and can apply a force to the valve core 3 to make it move left or right. Among them, the structure between the valve core 3 and the valve body 2 shown in this drawing is a conventional structure and will not be described in detail here.

[0039] Among them, refer to Figure 4 , Figure 5 , Figure 6 , Figure 8 , Figure 9 , the auxiliary commutation module includes an auxiliary commutation seat 9, an air injection port two 10 provided on the commutation installation main body, a first auxiliary commutation air passage 11 and a second auxiliary commutation air passage 12 disposed in the auxiliary commutation seat 9. Specifically, the auxiliary boosting chamber includes a first auxiliary boosting chamber 15 and a second auxiliary boosting chamber 16. One ends of the first auxiliary commutation air passage 11 and the second auxiliary commutation air passage 12 are respectively connected to the first auxiliary boosting chamber 15 and the second auxiliary boosting chamber 16, and can inject gas through the air injection port two 10 to apply pressure to the valve core 3 to make it slide in the valve body 2. The valve body 2 is provided with an exhaust passage one 13 and an exhaust passage two 14 for discharging the gas injected at both ends of the valve core 3 through the air injection port two 10. A first valve and a second valve are respectively provided at the exhaust passage one 13 and the exhaust passage two 14. The pneumatic motor further includes a valve switch assembly for opening or closing the first valve and the second valve. Among them, the first commutation air passage is connected to the first commutation chamber 103 through the auxiliary installation main body and then through the first end cover, and the second commutation air passage is connected to the second commutation chamber 104 through the auxiliary installation main body and then through the second end cover;

[0040] Specifically, refer to Figure 6 , Figure 7 , Figure 6 , Figure 7The middle auxiliary commutation seat 9 is arranged in the same direction. Among them, two long grooves are provided on the top surface of the auxiliary commutation seat 9, and the two long grooves respectively form a part of the first exhaust passage 13 and the second exhaust passage 14. A cover plate 25 is detachably connected to the top surface of the auxiliary commutation seat 9 to ensure the sealing of the two long grooves. A through hole one 2501 for ensuring the connection between the first exhaust passage 13 and the second auxiliary boost cavity 16, a through hole two 2502 for ensuring the connection between the second exhaust passage 14 and the first auxiliary boost cavity 15, a through hole three 2503 for ensuring the connection between the first auxiliary commutation air passage 11 and the first auxiliary boost cavity 15, a through hole four 2504 for ensuring the connection between the second auxiliary commutation air passage 12 and the second auxiliary boost cavity 16, and a through hole five 2505 and a through hole six 2506 for ensuring that the first commutation air passage 4 and the second commutation air passage 5 can pass through the auxiliary commutation seat 9 are provided on the cover plate 25.

[0041] Among them, referring to Figure 9 、 Figure 10 a piston 8 is arranged in the cylinder block 1, and the piston 8 divides the cylinder block 1 into a first commutation cavity 103 and a second commutation cavity 104. The first valve is arranged in the first commutation cavity 103, and the second valve is arranged in the second commutation cavity 104;

[0042] When the piston 8 abuts against the first valve, the first valve opens the first exhaust passage 13;

[0043] When the piston 8 abuts against the second valve, the second valve opens the second exhaust passage 14.

[0044] Among them, valve return members are provided at both the first valve and the second valve. When the piston 8 separates from the first valve or the second valve, specifically, the valve return members include a first return member 19 and a second return member 22. The first return member 19 and the second return member 22 respectively control the first valve and the second valve to close the first exhaust passage 13 and the second exhaust passage 14 respectively.

[0045] Among them, referring to Figure 10, the first valve includes a first valve housing 17 and a first abutting member 18. An exhaust port 23 is formed on the cylinder block 1. The first exhaust port 23 and the first exhaust passage 13 are both connected to the valve housing. The piston 8 abuts against the first abutting member 18 to connect the first exhaust passage 13 and the first exhaust port 23. When the piston 8 is separated from the first abutting member 18, the reset member controls the first abutting member 18 to separate the first exhaust passage 13 and the first exhaust port 23. The reset member can be a spring or the like. Specifically, it can be seen that the first valve housing 17 is a cavity with a one-way opening, and its cavity is stepped. The first abutting member 18 is a stepped cylinder. In the natural state, the reset member makes the stepped surface inside the first valve housing 17 fit with the stepped surface of the cylinder, so that the internal cavity of the first valve housing 17 is divided into two parts. A first connection hole 26 and a second connection hole 27 are formed in the first valve housing 17. The first connection hole 26 is connected to one end of the first exhaust passage 13, and the second connection hole 27 is connected to the first exhaust port 23. When the piston 8 abuts against and presses the first abutting member 18, the first connection hole 26 and the second connection hole 27 will be connected, and a connection passage 28 is formed between them to connect the first exhaust passage 13 with the outside to realize exhaust.

[0046] The second valve has the same structure as the first valve. Specifically, for distinction, the structures on the second valve are respectively named the second valve housing 20, the second abutting member 21, the second reset member 22, the third connection hole, and the fourth connection hole. An exhaust port 24 connected to the valve housing is formed on the cylinder block 1.

[0047] In the above structure, the piston, the first abutting member, the first reset member, the second abutting member, the second reset member, etc. together constitute a valve switch assembly.

[0048] Among them, referring to Figure 2 , Figure 3 , the air outlet 7 includes a first air outlet 701 and a second air outlet 702. The first air outlet 701 is connected to the first switching chamber 103 through a first switching air passage, and the second air outlet 702 is connected to the second switching chamber 104 through a second switching air passage.

[0049] When the valve core 3 controls the first injection port 6 to be connected to the first switching air passage, the second switching chamber 104 is connected to the second air outlet 702. At the same time, the valve core 3 cuts off the connection between the first air outlet 701 and the first switching air passage.

[0050] When the valve core 3 controls the first injection port 6 to be connected to the second switching air passage, the first switching chamber 103 is connected to the first air outlet 701. At the same time, the valve core 3 cuts off the connection between the second air outlet 702 and the second switching air passage.

[0051] Among them, referring to Figure 3, ferromagnetic materials 29 / magnets 30 are provided at both ends of the valve body 2, and magnets 30 / ferromagnetic materials 29 for cooperating with the ferromagnetic materials 29 / magnets 30 are provided at both ends of the valve core 3.

[0052] Working principle and process:

[0053] When the product of this solution is working, the first gas injection port 6 and the second gas injection port 10 inject gas simultaneously. The second gas port injects gas into the first auxiliary boosting chamber 15 and the second auxiliary boosting chamber 16 simultaneously, applying equal pressure to both ends. When a direction change is required, taking the piston 8 abutting against the first abutting member 18 as an example, after the piston 8 abuts against the first abutting member 18, the first abutting member 18 compresses the first reset member 19, causing the connection channel 28 to open. The gas in the second auxiliary boosting chamber 16 is discharged through the first exhaust port 23. Only one end of the first auxiliary boosting chamber 15 is subjected to the gas pressure injected by the second gas injection port 10. Under this pressure, the valve core 3 is quickly pushed to achieve direction change. At this time, the first direction-changing air passage 4 is communicated with the first direction-changing chamber 103, and the second direction-changing air passage 5 is connected to the second air outlet 702, causing the piston 8 to move in the reverse direction. Through the additional second gas injection port 10 and the supporting structure in this solution, and by applying an additional pressure to the valve core 3, the quick direction change response of the piston 8 is realized, effectively solving the problems mentioned in the background technology.

[0054] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A pneumatic motor with fast commutation response, comprising a cylinder block (1) and a commutation valve disposed thereon. The cylinder block (1) includes a first commutation chamber (103) and a second commutation chamber (104). The commutation valve includes a valve body (2) and a spool (3) sliding therein. The valve body (2) is provided with a first commutation air passage (4) and a second commutation air passage (5) respectively communicating with the first commutation chamber (103) and the second commutation chamber (104). The commutation valve is provided with a first air injection port (6) and an air outlet (7). The first air injection port (6) is communicated with the valve body (2). When the spool (3) controls the first air injection port (6) to communicate with the first commutation air passage (4), the second commutation chamber (104) is communicated with the air outlet (7). When the commutation valve controls the first air injection port (6) to communicate with the second commutation air passage, the first commutation chamber (103) is communicated with the air outlet (7). It is characterized in that: An auxiliary commutation module is further provided on the cylinder block (1), and the auxiliary commutation module can apply a force to the spool valve (3) to make it move left or right.

2. The pneumatic motor with fast commutation response according to claim 1, wherein: The auxiliary commutation module includes a second air injection port (10), a first auxiliary commutation air passage (11) and a second auxiliary commutation air passage (12). One ends of the first auxiliary commutation air passage (11) and the second auxiliary commutation air passage (12) are respectively disposed at both ends of the spool valve (3), and can inject gas through the second air injection port (10) to apply a pressure to the spool valve (3) to make it slide in the valve body (2). Exhaust passages one (13) and two (14) for discharging the gas injected at both ends of the spool valve (3) by the second air injection port (10) are provided on the valve body (2). A first valve and a second valve are respectively disposed at the exhaust passage one (13) and the exhaust passage two (14). The pneumatic motor further includes a valve switch assembly for opening or closing the first valve and the second valve.

3. The pneumatic motor with fast commutation response according to claim 2, characterized in that: A piston (8) is disposed in the cylinder block (1), and the piston (8) divides the cylinder block (1) into a first commutation chamber (103) and a second commutation chamber (104). The first valve is disposed in the first commutation chamber (103), and the second valve is disposed in the second commutation chamber (104); When the piston (8) abuts against the first valve, the first valve opens the exhaust passage one (13); When the piston (8) abuts against the second valve, the second valve opens the exhaust passage two (14).

4. A pneumatic motor with fast commutation response according to claim 3, characterized in that: Valve reset members are disposed at both the first valve and the second valve. When the piston (8) separates from the first valve or the second valve, the valve reset members control the first valve or the second valve to close the exhaust passage one (13) and the exhaust passage two (14) respectively.

5. A pneumatic motor with fast commutation response according to claim 4, characterized in that: The first valve includes a valve housing one (17) and an abutting member one (18). An exhaust port one (23) is provided on the cylinder block (1). The exhaust port one (23) and the exhaust passage one (13) are both communicated with the valve housing one (17). The piston (8) abuts against the abutting member one (18) to make the exhaust passage one (13) communicate with the exhaust port one (23); when the piston (8) separates from the abutting member one (18), the reset member controls the abutting member one (18) to separate the exhaust passage one (13) from the exhaust port one (23); The second valve has the same structure as the first valve.

6. A pneumatic motor with fast commutation response according to claim 1, characterized in that: The air outlet (7) includes a first air outlet (701) and a second air outlet (702). The first air outlet (701) is communicated with the first commutation chamber (103) through a first commutation air passage (4), and the second air outlet (702) is communicated with the second commutation chamber (104) through a second commutation air passage (5); When the spool valve (3) controls the first air injection port (6) to communicate with the first commutation air passage (4), the second commutation chamber (104) is communicated with the second air outlet (702). At the same time, the spool valve (3) cuts off the communication relationship between the first air outlet (701) and the first commutation air passage (4); When the valve core (3) controls the communication between the first gas injection port (6) and the second reversing air passage (5), the first reversing chamber (103) is communicated with the first air outlet (701). At the same time, the valve core (3) cuts off the communication between the second air outlet (702) and the second reversing air passage (5).

7. A pneumatic motor with fast commutation response according to claim 1, characterized in that: Ferromagnetic substances (29) / magnets (30) are arranged at both ends of the valve body (2), and magnets (30) / ferromagnetic substances (29) used in cooperation with the ferromagnetic substances (29) / magnets (30) are arranged at both ends of the valve core (3).

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