Pneumatic motor

Abstract

The pneumatic motor is characterized in that a cylinder body is provided with an accommodating cavity, and the accommodating cavity is provided with an upper opening and an air port; the valve plate body divides the containing cavity into an upper cavity and a lower cavity, the upper opening is communicated with the upper cavity, the air port is communicated with the lower cavity, the valve plate body is provided with a first through hole, a valve plate spring piece is fixed to the valve plate body, and the valve plate spring piece closes or opens the first through hole; the piston body is contained in the upper cavity, a second through hole is formed in the piston body, a piston spring piece is fixed to the piston body, and the piston spring piece closes or opens the second through hole; the piston body is fixedly provided with a piston end cover, the piston end cover is provided with a fifth through hole matched with the second through hole, and the piston end cover is located between the piston spring piece and the piston body; the piston end cover is made of a wear-resistant material; through the arrangement of the piston end cover, the stability of the piston body is improved, noise is reduced, the piston end cover is made of a wear-resistant material, the wear resistance of the section is improved, wear is reduced, and the overall service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pneumatic motor technical field, concretely relates to a pneumatic motor. BACKGROUND

[0002] The pneumatic motor drives the piston to carry out linear motion through compressed air, and converts the linear motion into rotary motion through the connecting rod and the crankshaft. The piston moves axially and linearly relative to the cylinder body. SUMMARY

[0003] Therefore, the utility model wants to solve the technical problem of the piston wear resistance.

[0004] Therefore, a kind of pneumatic motor, comprising:

[0005] Cylinder body, the cylinder body is equipped with containing cavity, the containing cavity is equipped with upper opening and gas port;

[0006] Valve plate body, the valve plate body is housed in the containing cavity, the valve plate body separates the containing cavity and forms upper chamber and lower chamber, the upper opening is communicated with the upper chamber, the gas port is communicated with the lower chamber, the valve plate body is equipped with first through-hole, the valve plate body is fixed with valve plate spring piece, the valve plate spring piece closes or opens the first through-hole;

[0007] Piston body, the piston body is housed in the upper chamber, the piston body is equipped with second through-hole, the piston body is fixed with piston spring piece, and the piston spring piece closes or opens the second through-hole;The piston end cover of the piston body is fixed towards the valve plate body side, the piston end cover is equipped with the fifth through-hole matched with the second through-hole, and the piston end cover is located between the piston spring piece and the piston body;The piston end cover is wear-resistant material.

[0008] One of the piston body and the piston end cover is equipped with first fixed groove, and the other of the piston body and the piston end cover is equipped with first fixed part matched with the first fixed groove.

[0009] The first fixed groove is dovetail groove;Or, the first fixed groove is equipped with barb structure;Or, the first fixed groove is equipped with stepped hole.

[0010] The piston end cover is integrally injection molded.

[0011] Valve plate end cover is fixed to the side, away from the piston body, of the valve plate body, the valve plate end cover is equipped with the sixth through-hole matched with the first through-hole, and the valve plate end cover is located between the valve plate body and the valve plate spring piece;The valve plate end cover is wear-resistant material.

[0012] The second fixing groove is a dovetail groove; or, the second fixing groove is provided with a barb structure; or, the second fixing groove is provided with a stepped hole.

[0013] The valve plate end cover is integrally injection molded.

[0014] The cylinder body comprises a cylinder body and a cylinder cover, and the cylinder body and the cylinder cover cooperate to form the accommodating cavity.

[0015] The connection between the cylinder body and the cylinder cover forms a stepped groove, and the valve plate body cooperates with the stepped groove.

[0016] The technical scheme of the utility model has the following advantages:

[0017] 1. The utility model provides a pneumatic motor, through the setting of the piston end cover, the stability of the piston body is improved, the generation of noise is reduced, secondly, the piston end cover is wear-resistant material, the wear resistance of the cross section is improved, the abrasion is reduced, and the overall service life is improved.

[0018] 2. The utility model provides a pneumatic motor, the setting of the first fixing groove improves the fixing strength of the piston end cover, and prevents the piston end cover from falling off in the movement process of the piston body.

[0019] 3. The utility model provides a pneumatic motor, and different structures can improve the fixing strength of the piston end cover.

[0020] 4. The utility model provides a pneumatic motor, integrally injection molding is specifically that the piston body is placed into a mould first, then glue injection is carried out, and the piston end cover is formed on the surface of the piston body.

[0021] 5. The utility model provides a pneumatic motor, the setting of the valve plate end cover forms the mutual cooperation effect between the piston end cover, further improves the noise reduction effect, and reduces noise.

[0022] 6. The utility model provides a pneumatic motor, integrally injection molding is specifically that the valve plate body is placed into a mould first, then glue injection is carried out, and the valve plate end cover is formed on the surface of the valve plate body. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0024] Figure 1 A structure schematic view of the pneumatic motor is provided in the utility model;

[0025] Figure 2 A sectional view of the pneumatic motor is provided in the utility model;

[0026] Figure 3 A Figure 2 A partial enlarged view of A part in the utility model;

[0027] Figure 4 A sectional view of the pneumatic motor from another angle is provided in the utility model;

[0028] Figure 5 A Figure 4 A partial enlarged view of B part in the utility model.

[0029] Explanation of reference signs:

[0030] 11, cylinder body; 12, piston body; 13, valve plate body; 14, valve plate spring piece; 15, valve plate end cover; 16, piston spring piece; 18, shaft pin; 19, connecting rod; 21, piston end cover; 22, cylinder body; 23, cylinder cover; 24, first fixed part; 25, first fixed groove; 26, second fixed part; 27, second fixed groove; 28, stepped groove; 111, accommodating cavity; 112, upper opening; 113, gas port; 114, upper chamber; 115, lower chamber; 121, second through hole; 131, first through hole; 151, sixth through hole; 211, fifth through hole. DETAILED DESCRIPTION

[0031] The technical scheme of the utility model will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0032] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the terms "mount", "link", "connect" should be understood broadly, for example, it can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0034] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0035] Example 1

[0036] The embodiment provides a kind of pneumatic motor, as shown in attached Figures 1-5 It includes:

[0037] Cylinder body 11, cylinder body 11 is equipped with containing cavity 111, containing cavity 111 is equipped with upper opening 112 and gas port 113, and is equipped with valve distribution, and valve distribution is matched with gas port 113, realizes the axial reciprocating motion of piston body 12. One pneumatic motor can have three groups of cylinder body 11 or five groups of cylinder body 11, even more, in the embodiment, only one group of cylinder body 11 is described, and those skilled in the art should know the cooperation between piston body 12 and crankshaft, which also forms the work of the whole pneumatic motor, so it is not described here.

[0038] Valve plate body 13, valve plate body 13 is housed in containing cavity 111, valve plate body 13 is divided into upper chamber 114 and lower chamber 115, and upper chamber 114 is located at the top, and lower chamber 115 is located at the bottom, and upper opening 112 is communicated with upper chamber 114, and gas port 113 is communicated with lower chamber 115, and valve plate body 13 is equipped with first through-hole 131, and valve plate body 13 is fixed with valve plate spring piece 14, and valve plate spring piece 14 closes or opens first through-hole 131, here, when first through-hole 131 is opened, upper chamber 114 and lower chamber 115 are communicated through first through-hole 131, when first through-hole 131 is closed, upper chamber 114 and lower chamber 115 are closed. Here, the number of first through-hole 131 can be adjusted according to actual demand, can be one, or multiple. Valve plate spring piece 14 also plays the effect of shock absorption and buffering.

[0039] A piston body 12 is housed in an upper chamber 114. The piston body 12 has a second through hole 121 and a piston spring plate 16 is fixed to it. The piston spring plate 16 can close or open the second through hole 121. The second through hole 121 connects the upper chamber 114 to the valve plate body 13. The piston spring plate 16 also serves as a shock absorber. A piston end cap 21 is fixed to the side of the piston body 12 facing the valve plate body 13. In this embodiment, specifically, the piston end cap 21 is fixed to the bottom surface of the piston body 12. The piston end cap 21 has a fifth through hole 211 that mates with the second through hole 121. The number of fifth through holes 211 is the same as the number of second through holes 121, and the second through holes 121 and the fifth through holes 211 are vertically connected. The piston end cap 21 is made of a wear-resistant material.

[0040] The piston end cap 21 improves the stability of the piston body 12 and reduces noise generation. Furthermore, the piston end cap 21 is made of wear-resistant material, which improves the wear resistance of the cross-section, reduces wear, and extends the overall service life. The piston end cap 21 is made of engineering plastic.

[0041] Specifically, as shown in the attached document Figures 2-5 As shown, one of the piston body 12 and the piston end cap 21 is provided with a first fixing groove 25, and the other of the piston body 12 and the piston end cap 21 is provided with a first fixing part 24 that cooperates with the first fixing groove 25. When the piston body 12 is provided with the first fixing groove 25, the piston end cap 21 is provided with the first fixing part 24; conversely, when the piston body 12 is provided with the first fixing part 24, the piston end cap 21 is provided with the first fixing groove 25. Those skilled in the art can adjust according to actual needs. In this embodiment, the piston body 12 is provided with the first fixing groove 25 and the piston end cap 21 is provided with the first fixing part 24 as an example. The setting of the first fixing groove 25 improves the fixing strength of the piston end cap 21 and prevents the piston end cap 21 from falling off during the movement of the piston body 12. In addition, the wear-resistant parts can also be fixed to the piston body 12 by bolts or adhesive.

[0042] Specifically, the first fixing groove 25 is a dovetail groove, where the bottom dimension of the first fixing groove 25 is larger than the top dimension, creating a bottom-larger-top-smaller effect. Alternatively, the first fixing groove 25 may have a barb structure, which provides radial locking, thus securing the piston end cap 21 to the piston body 12. Both structures can improve the fixing strength of the piston end cap 21.

[0043] Specifically, the piston end cap 21 is integrally injection molded. Integral injection molding means that the piston body 12 is first placed into the mold, and then glue is injected so that the piston end cap 21 is formed on the surface of the piston body 12.

[0044] Specifically, the first fixed groove 25 is annularly arranged, and the number of the first fixed groove 25 can be one or multiple, and when the first fixed groove 25 is multiple, the imaginary center lines of all the first fixed grooves 25 are arranged in a same line.

[0045] Specifically, as shown in the accompanying drawings, Figures 2-5 Specifically, the valve plate end cover 15 is fixed to the side of the valve plate body 13 away from the piston body 12, and the valve plate end cover 15 is specifically fixed to the bottom surface of the valve plate body 13. The valve plate end cover 15 is provided with a sixth through hole 151 matched with the first through hole 131, and the number of the first through hole 131 and the sixth through hole 151 is the same, and the two are communicated in up and down directions. The valve plate end cover 15 is located between the valve plate body 13 and the valve plate spring sheet 14, and the valve plate end cover 15 is made of wear-resistant material. The valve plate end cover 15 is arranged to form a matching effect with the piston end cover 21, thereby further improving the noise reduction effect and reducing the noise. Moreover, the valve plate end cover 15 is also made of wear-resistant material to reduce wear. Here, if the valve plate end cover 15 is not arranged and only the piston end cover 21 is arranged, the noise reduction effect can also be achieved. The material of the valve plate end cover 15 is engineering plastic.

[0046] Specifically, the second fixed groove 27 is a dovetail groove, and the dovetail groove is specifically that the size of the bottom surface of the second fixed groove 27 is greater than the size of the top surface of the second fixed groove 27, thereby forming a large-bottom-small-top effect. Alternatively, the second fixed groove 27 is provided with a barb structure, which is a radial locking to fix the valve plate end cover 15 and the valve plate body 13. Different structures can improve the fixing strength of the valve plate end cover 15.

[0047] Specifically, the valve plate end cover 15 is integrally injection molded. The integrally injection molding specifically means that the valve plate body 13 is first placed into a mold, and then glue is injected to form the valve plate end cover 15 on the surface of the valve plate body 13.

[0048] Specifically, the second fixed groove 27 is annularly arranged, and the number of the second fixed groove 27 can be one or multiple, and when the second fixed groove 27 is multiple, the imaginary center lines of all the second fixed grooves 27 are arranged in a same line.

[0049] Specifically, as shown in the accompanying drawings, Figures 1-5 Specifically, as shown in the accompanying drawings,

[0050] Specifically, a sealing ring is arranged between the valve plate body 13 and the cylinder body 22, and a sealing ring is also arranged between the valve plate body 13 and the cylinder cover 23, so as to improve the sealing level. The two sealing rings are located in the stepped groove 28.

[0051] Specifically, as shown in the accompanying drawings, Figures 1-5 The screw is connected and fixed with the piston end cover 21 and the piston body 12 through the piston spring plate 16, but it should be noted that the piston spring plate 16 can move up and down along the screw.

[0052] Specifically, the screw is connected and fixed with the valve plate body 13 through the valve plate spring plate 14 and the valve plate end cover 15, but it should be noted that the valve plate spring plate 14 can move up and down along the screw. It should be noted that in the embodiment, the number of screws is two, one screw is used to fix the piston spring plate 16, and the other screw is used to fix the valve plate spring plate 14.

[0053] Specifically, as shown in the accompanying drawings, Figures 1-5 It also includes a shaft pin 18 and a connecting rod 19, the shaft pin 18 cooperates with the piston body 12. One end of the connecting rod 19 cooperates with the shaft pin 18, and the other end of the connecting rod 19 cooperates with the crankshaft. When the piston body 12 reciprocates relative to the upper chamber 114, the connecting rod 19 also moves, so as to cooperate with the crankshaft, so as to realize the conversion of linear motion into rotary motion. The connecting rod 19 is partially located in the upper chamber 114, and the connecting rod 19 partially extends to the outside through the upper opening 112 and cooperates with the crankshaft.

[0054] Obviously, the above-mentioned embodiments are only examples for clearly illustrating, but not limit the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A pneumatic motor characterized in that, The cylinder body (11) is provided with a containing cavity (111) provided with an upper opening (112) and a gas port (113). The valve plate body (13) is accommodated in the containing cavity (111), and the valve plate body (13) divides the containing cavity (111) into an upper chamber (114) and a lower chamber (115), the upper opening (112) communicates with the upper chamber (114), the gas port (113) communicates with the lower chamber (115), the valve plate body (13) is provided with a first through hole (131), and the valve plate spring piece (14) is fixed to the valve plate body (13) and closes or opens the first through hole (131). The piston body (12) is accommodated in the upper chamber (114), and the piston body (12) is provided with a second through hole (121), and the piston spring piece (16) is fixed to the piston body (12) and closes or opens the second through hole (121); the piston end cover (21) is fixed to one side of the piston body (12) facing the valve plate body (13), the piston end cover (21) is provided with a fifth through hole (211) matched with the second through hole (121), and the piston end cover (21) is located between the piston spring piece (16) and the piston body (12); the piston end cover (21) is made of wear-resistant material. One of the piston body (12) and the piston end cover (21) is provided with a first fixing groove (25), and the other of the piston body (12) and the piston end cover (21) is provided with a first fixing part (24) matched with the first fixing groove (25).

2. The pneumatic motor of claim 1, wherein, The first fixing groove (25) is a dovetail groove; or the first fixing groove (25) is provided with a barb structure.

3. The pneumatic motor of claim 2, wherein, The piston end cover (21) is integrally injection molded.

4. A pneumatic motor according to claim 2 or 3, characterised in that, The valve plate end cover (15) is fixed to one side of the valve plate body (13) away from the piston body (12), the valve plate end cover (15) is provided with a sixth through hole (151) matched with the first through hole (131), and the valve plate end cover (15) is located between the valve plate body (13) and the valve plate spring piece (14); the valve plate end cover (15) is made of wear-resistant material.

5. The pneumatic motor of claim 1, wherein, The second fixing groove (27) is a dovetail groove; or the second fixing groove (27) is provided with a barb structure.

6. The pneumatic motor of claim 5, wherein, The valve plate end cover (15) is integrally injection molded.

7. A pneumatic motor according to claim 5 or 6, characterised in that, The cylinder body (11) comprises a cylinder body (22) and a cylinder cover (23), and the cylinder body (22) and the cylinder cover (23) cooperate to form the containing cavity (111).

8. The pneumatic motor of claim 1, wherein, The connecting part of the cylinder body (22) and the cylinder cover (23) forms a stepped groove (28), and the valve plate body (13) cooperates with the stepped groove (28).

9. The pneumatic motor of claim 8, wherein, ​

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