Pneumatic device and manufacturing method thereof

Abstract

The invention relates to the pneumatic field, in particular to a pneumatic device and a manufacturing method thereof.The pneumatic device comprises an air cylinder and a control valve, the air cylinder comprises a cylinder body and a piston assembly, the air cylinder comprises a containing cavity, the piston assembly comprises a piston head, the piston head is located in the containing cavity, the cylinder body is provided with a first outer wall part, and the control valve and the first outer wall part are arranged in a limited mode or fixed; the cylinder body is provided with the air path channel, the control valve is provided with the working channel, the air path channel is communicated with the containing cavity and the working channel, the corresponding air cylinder and the control valve are provided, compared with the background technology, assembly of other middleware such as installation of the air path plate, the air cylinder and the control valve is avoided, and the installation process is simple.

Description

Technical Field

[0001] The present invention relates to the field of pneumatics, and in particular to a pneumatic device and a manufacturing method thereof. Background Art

[0002] refer to Figure 8 In the field of pneumatics, the valve is used as a control element and the cylinder 1' is used as an actuator. The valve controls the on-off of the gas circuit, thereby controlling the movement of the piston of the cylinder 1', thereby driving other mechanisms to operate.

[0003] A pneumatic device of the related technology includes a control valve 2', a cylinder 1' and an air circuit board 3', the cylinder 1' includes a front cover 11', a rear cover 12' and a cylinder body 13', the front cover 11' and the rear cover 12' are respectively fixed to the cylinder body 13'; the air circuit board 3' has an air path channel 30', the air circuit board 3' is respectively fixed to the control valve 2' and the cylinder 1', so that the air path channel 30' is connected to the working port of the control valve 2' and the cylinder 1'.

[0004] However, during the manufacturing process, the front cover 11' and the rear cover 12' need to be fixed to the cylinder body 13' by riveting and rolling, and then the cylinder 1' and the control valve 2' need to be fixed to the gas path plate 3'. The installation process is relatively complicated and needs to be further optimized. Summary of the invention

[0005] The present invention provides a pneumatic device to solve the above problems:

[0006] A pneumatic device includes a cylinder and a control valve. The cylinder includes a cylinder body and a piston assembly. The cylinder includes a accommodating chamber. The piston assembly includes a piston head. The piston head is located in the accommodating chamber. The cylinder body has a first outer wall portion. The control valve is limited or fixed to the first outer wall portion. The cylinder body has an air path channel. The control valve has a working channel. The air path channel connects the accommodating chamber and the working channel.

[0007] Such a pneumatic device has a first outer wall portion on the cylinder body, a control valve and the first outer wall portion are limited or fixed, the cylinder body has an air path channel, the control valve has a working channel, and the air path channel connects the accommodating chamber and the working channel. Compared with the background technology, the assembly of other intermediate parts, such as the installation of the air path plate, the cylinder and the control valve, is avoided, and the installation process is relatively simple.

[0008] The present invention provides a method for manufacturing a pneumatic device to solve the above problems:

[0009] The manufacturing method of the pneumatic device comprises the following steps:

[0010] A cylinder is provided, the cylinder comprising a cylinder body and a piston assembly, the cylinder comprising an accommodating cavity, the piston assembly comprising a piston head, the piston head is located in the accommodating cavity, and the cylinder body has a first outer wall portion;

[0011] Provide control valves;

[0012] The control valve is limitedly set or fixed to the first outer wall portion.

[0013] Such a method for manufacturing a pneumatic device includes providing a cylinder, the cylinder including a cylinder body and a piston assembly, the cylinder including a accommodating chamber, the piston assembly including a piston head, the piston head is located in the accommodating chamber, and the cylinder body has a first outer wall portion; providing a control valve; limiting or fixing the control valve to the first outer wall portion. Compared with the background technology, the assembly of other intermediate parts, such as the installation of the air circuit board, the cylinder and the control valve, is avoided, and the installation process is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional schematic diagram of a piston assembly of a pneumatic device in a first position under an embodiment;

[0015] Figure 2 A cross-sectional schematic diagram of a piston assembly of a pneumatic device in a second position under an embodiment;

[0016] Figure 3 is a cross-sectional schematic diagram of a piston assembly of a pneumatic device in a third position under an embodiment;

[0017] Figure 4 A cross-sectional schematic diagram of a cylinder body portion of an embodiment;

[0018] Figure 5 is a schematic diagram of a piston assembly according to an embodiment;

[0019] Figure 6 A schematic diagram of a sealing portion of an embodiment;

[0020] Figure 7 A schematic diagram of a stopper portion of an embodiment;

[0021] Figure 8 It is a cross-sectional schematic diagram of background technology.

[0022] Reference numerals:

[0023] Cylinder 1, cylinder body 11, platform portion 12, first outer wall portion 121, gas path 13, inner port 130, first inner port 131, second inner port 132, outer port 133, first branch 134, second branch 135, cylinder body bottom wall 14, cylinder body side wall 15, first section 151, second section 152, blocking portion 16, step hole 161, first step 1611, First top wall 1610, second step 1612, second top wall 1613, step side wall 1614, piston assembly 17, piston head 171, piston side wall 1711, first recessed portion 1712, first end wall 1713, second recessed portion 1714, piston rod 172, accommodating chamber 18, first space 181, second space 182, first channel 19;

[0024] Control valve 2, working channel 20, first exhaust channel 21, second exhaust channel 22, valve working port 23, valve first working port 231, valve second working port 232;

[0025] Sealing part 010; Stopping part 011,

[0026] A first limiting portion 3, a second limiting portion 4;

[0027] First position 7, second position 8, third position 9;

[0028] Control valve 2';

[0029] Cylinder 1', front cover 11', rear cover 12', cylinder body 13';

[0030] Gas circuit board 3', gas circuit channel 30', and conducting channel 31'. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is 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 intended to limit the present invention.

[0032] The technical solution of the specific implementation is described below in conjunction with the accompanying drawings:

[0033] refer to Figure 1-Figure 8 A pneumatic device includes a cylinder 1 and a control valve 2, wherein the cylinder 1 includes a piston assembly 17, the control valve 2 includes a working channel 20, the cylinder 1 includes a receiving chamber 18, the piston assembly 17 includes a piston head 171, the piston head 171 is located in the receiving chamber 18, and the cylinder 1 includes an air path channel 13, the air path channel 13 communicates with the receiving chamber 18 and the working channel 20. The working channel 20 has a valve working port 23, the valve working port 23 includes a valve first working port 231 and a valve second working port 232, the air path channel 13 includes a first branch 134 and a second branch 135, the first branch 134 communicates with the valve first working port 231, and the second branch 135 communicates with the valve second working port 232; the working channel 20 includes a first exhaust channel 21, a second exhaust channel 22 and an air source port (not shown in the figure), and the movement of the piston head 171 is realized by moving the valve stem (not shown in the figure) of the control valve.

[0034] Define, a fourth position (not shown in the figure) and a fifth position (not shown in the figure), the fourth position (not shown in the figure) is a position where the valve stem of the control valve (not shown in the figure) is located, and the fifth position (not shown in the figure) is another position where the valve stem of the control valve (not shown in the figure) is located; define the first position 7 and the second position 8 as two extreme positions of the piston head 171 in the moving direction; define the first direction as the moving direction of the piston head from the second position to the first position as the first direction.

[0035] When the valve stem (not shown in the figure) of the control valve is in the fourth position (not shown in the figure), under the action of the valve stem (not shown in the figure), the first exhaust channel 21 and the first working port 231 of the valve are connected, the second exhaust channel 22 and the second working port 232 of the valve are disconnected, and the gas enters the working channel 20 through the gas source port (not shown in the figure), enters the accommodating chamber 18 through the second branch 135 and the second working port 232 of the valve, and the gas acts on one side of the piston head 171 to push the piston 171 to move to the first position 7 along the first direction, and the gas on the other side of the piston head 171 is discharged from the control valve through the first branch 134, the first working port 231 of the valve and the first exhaust channel 21; when the valve stem (not shown in the figure) of the control valve is in the fifth position (not shown in the figure), under the action of the valve stem (not shown in the figure) of the control valve, the first exhaust channel 21 and the first working port 231 of the valve are connected, and the second exhaust channel 22 and the second working port 232 of the valve are disconnected, and the gas enters the working channel 20 through the gas source port (not shown in the figure), and enters the accommodating chamber 18 through the second branch 135 and the second working port 232 of the valve, and the gas acts on one side of the piston head 171 to push the piston 171 to move to the first position 7 along the first direction, and the gas on the other side of the piston head 171 is discharged from the control valve through the first branch 134, the first working port 231 of the valve and the first exhaust channel 21; 231 is disconnected, the second exhaust channel 22 and the second working port 232 of the valve are connected, the gas enters the working channel 20 through the gas source port (not shown in the figure), enters the accommodating chamber 18 through the first branch 134 and the first working port 231 of the valve, and the gas acts on one side of the piston head 171, pushing the piston 171 to move in the opposite direction of the first direction to the second position 8, and the gas on the other side of the piston head 171 is discharged from the control valve through the second branch 135, the second working port 232 of the valve and the second exhaust channel 22. In this way, the movement of the piston head 171 is realized by moving the valve stem (not shown in the figure) of the control valve 2. The piston assembly 17 includes a piston rod 172, and the piston head 171 and the piston rod 172 are fixed or limited or integrated. The movement of the piston head 171 drives the movement of the piston rod 172, and the piston rod 172 is connected to the execution structure to finally realize the action of the actuator.

[0036] The cylinder 1 includes a cylinder body 11 , the cylinder body 11 has a first outer wall portion 121 , the control valve 2 is limitedly arranged or fixed to the first outer wall portion 121 , the cylinder body 11 has an air path channel 13 , and the air path channel 13 connects the accommodating chamber 18 and the working channel 20 .

[0037] Such a pneumatic device has a first outer wall portion 121 in the cylinder body 11, the control valve 2 is limitedly set or fixed to the first outer wall portion 121, the cylinder body 11 has an air path channel 13, the control valve 2 includes a working channel 20, and the air path channel 13 connects the accommodating chamber 18 and the working channel 20. Compared with the background technology, the assembly of other intermediate parts, such as the installation of the air path plate 3', the cylinder 1' and the control valve 2', is avoided, and the installation process is relatively simple.

[0038] It should be noted that the limiting setting between the control valve 2 and the first outer wall portion 121 can be understood as a limiting setting between the control valve 2 and the first outer wall portion 121, and the control valve 2 and the first outer wall portion 121 are both detachable, for example, the control valve 2 and the first outer wall portion 121 are limited by bolts, or other detachable limiting methods; the control valve 2 and the first outer wall portion 121 are fixed, which can be understood as the control valve 2 and the first outer wall portion 121 are not detachable, for example, the control valve 2 and the first outer wall portion 121 are welded and fixed, or fixed by other non-detachable implementation methods.

[0039] Specifically, the air path channel 13 includes an inner port 130 and an outer port 133. The inner port 130 is located on the inner wall corresponding to the accommodating chamber 18, and the outer port 133 is located on the first outer wall portion 121. The working channel 20 has a valve working port 23, and the outer port 133 is connected to the valve working port 23. In this way, the accommodating chamber 18 and the working channel 20 are connected through the air path channel 13 corresponding to the cylinder body 11. Compared with the background technology, the assembly of other intermediate parts is avoided, such as the installation of the air path plate 3' with the cylinder 1' and the control valve 2', and the installation process is relatively simple.

[0040] In one embodiment, reference Figure 1-7 The cylinder body 11 includes a cylinder side wall 15, at least a portion of the cylinder side wall 15 extends along the moving direction of the piston head 171, the cylinder side wall 15 and the piston head 171 are slidably matched, the cylinder body 11 includes a platform portion 12, the platform portion 12 protrudes from the cylinder side wall 15, the first outer wall portion 121 is at least a portion of the platform portion 12, and the first outer wall portion 121 is set away from the cylinder side wall 15.

[0041] Such a pneumatic device, with the platform portion 12 protruding from the cylinder side wall 15, the first outer wall portion 121 is at least a part of the platform portion 12, and the first outer wall portion 121 is arranged away from the cylinder side wall 15, which reduces the material cost compared with other implementations; for example, the outer surface of the cylinder 11 is made into a square cross-section shape, and the wall portion corresponding to one surface of the square and the control valve are fixed or limited. Although it can also meet the assembly requirements of the cylinder and the control valve, the material cost is higher than that of the present embodiment.

[0042] More specifically, refer to Figure 1-Figure 8, the third position 9 is defined as the moving direction of the piston head 171, and the piston head 171 is located at any position between the first position 7 and the second position 8; specifically, when the piston head 171 is located at the first position 7, the piston head 171 abuts against the cylinder bottom wall 14, and when the piston head 171 is located at the second position 8, the piston head 171 abuts against the blocking portion 16; when the piston head 171 is located at the third position 9, the accommodating chamber 18 includes a first space 181 and a second space 182, and along the moving direction of the piston head 171, the first space 181 and the second space 182 are respectively located on both sides of the piston head 171, and the inner port 130 includes a first inner port 131 and a second inner port 132, the first inner port 131 is located at the cylinder side wall 15 corresponding to the first space 181, and the second inner port 132 is located at the cylinder side wall 15 corresponding to the second space 182.

[0043] Such a pneumatic device, by having the first inner opening 131 located on the cylinder side wall 15 corresponding to the first space 181 and the second inner opening 132 located on the cylinder side wall 15 corresponding to the second space 182, can reduce the linear distance between the first inner opening 131 and the second inner opening 132 in the moving direction of the piston head 171. Compared with the background art in which the air holes of the cylinder 1' are arranged on the front cover 11' and the rear cover 12', while ensuring the stroke of the piston head 171, it is more conducive to the miniaturization of the cylinder 1. At the same time, in the prior art, in order to ensure that the gas entering the cylinder 1 can drive the piston to move, it is necessary to open a conducting channel 31' between the air port of the air path channel 30' and the piston at the extreme position, that is, to process the conducting channel 31' on the front cover 11' and / or the rear cover 12', and the process is complicated.

[0044] refer to Figure 1-Figure 8 The cylinder body 11 includes a piston bottom wall 14. Along the moving direction of the piston head 171, the piston bottom wall 14 and the piston head 171 are arranged opposite to each other. The piston head 171 includes a piston side wall 1711 that slides with the cylinder body side wall 15. The piston head 171 includes a first recessed portion 1712. The first recessed portion 1712 is located on the side of the piston side wall 1711 facing the piston bottom wall 14. In the radial direction of the piston head, the first recessed portion 1712 is recessed in the piston side wall 1711. The piston head 171 includes a first end wall 1713. The first end wall 1713 is opposite to the piston bottom wall 14. The piston head 171 includes a second recessed portion 1714. The second recessed portion 1714 is recessed in the first end wall 1713, so as to make space for the gas to enter the accommodating chamber 18 from the first inner port 131 and act on one side of the moving direction of the piston head 171.

[0045] More specifically, when the piston head 171 is located at the first position 7, the first inner port 131 abuts against the cylinder bottom wall 14; in order to ensure that the gas entering the accommodating chamber 18 through the first inner port 131 can better act on the piston head 171 and push the piston head 171 to move, corresponding improvements are made to the piston head 171.

[0046] When the piston head 171 is located at the first position 7, the cylinder 1 includes a first channel 19, and the wall corresponding to the first channel 19 includes a first recessed portion 1712, a second recessed portion 1714 and a wall corresponding to the cylinder body 11. When the piston head 171 is located at the first position 7, the first channel 19 and the first inner port 131 are connected.

[0047] Such a pneumatic device, through the wall corresponding to the first channel 19 including the first recessed portion 1712, the second recessed portion 1714 and the wall corresponding to the cylinder body 11, when the piston head 171 is located in the first position 7, the first channel 19 and the first inner port 131 are connected, and the gas can enter the axial side area of ​​the piston head 171 more quickly through the first channel 19, act on the piston head 171, and make the response speed of the piston head 171 faster.

[0048] In one embodiment, reference Figure 1-Figure 8 The pneumatic device includes a first limiting portion 3 and a second limiting portion 4. Along the moving direction of the piston head 171, the pneumatic device includes a blocking portion 16. The piston assembly 17 includes a piston rod 172. The piston rod 172 is penetrated by the blocking portion 16. Along the moving direction of the piston head 171, at least part of the blocking portion 16 is limited between the first limiting portion 3 and the second limiting portion 4. Along the moving direction of the piston head 171, the first limiting portion 3 is close to the piston head 171 relative to the second limiting portion 4, and the second limiting portion 4 is limited to the cylinder body 11.

[0049] It should be noted that: the second limiting portion 4 being limited to the cylinder body 11 can be understood as the second limiting portion 4 and the cylinder body 11 being detachable.

[0050] Such a pneumatic device is limited to the cylinder body 11 by the second limiting portion 4, that is, the second limiting portion 4 is detachable, and then in the moving direction of the piston head, when the blocking portion 16 loses the limit in one direction, the blocking portion 16 can be removed from this direction.

[0051] More specifically, the cylinder side wall 15 includes a first section 151 and a second section 152, the inner diameter corresponding to the first section 151 is smaller than the inner diameter corresponding to the second section 152, the piston head 171 and the first section 151 are slidably matched, the sealing portion 16 and the second section 152 are abutted, and the cylinder side wall 15 includes a transition portion, which connects the first section 151 and the second section 152, the transition portion is a first limiting portion 3, and the second limiting portion 4 is a retaining spring, and the cylinder 11 includes a first groove, and the second limiting portion 4 is limited to the first groove.

[0052] Such a pneumatic device has an inner diameter corresponding to the first section 151 that is smaller than the inner diameter corresponding to the second section 152, and a transition portion connects the first section 151 and the second section 152. The transition portion is the first limiting portion 3, so that the blocking portion 16 can be disassembled. That is, when disassembly is required, the second limiting portion 4 can be disassembled first. After the blocking portion 16 loses the restriction of the second limiting portion 4, the blocking portion 16 can be removed from this direction, and then the piston assembly 17 can be removed, and the blocking portion 16 can be disassembled.

[0053] Of course, the second limiting portion 4 and the cylinder body 11 may also adopt other limiting methods to achieve the detachability of the second limiting portion 4 and the cylinder body 11, which will not be elaborated here.

[0054] In one embodiment, reference Figure 1-Figure 8 The piston assembly 17 includes a piston rod 172, the pneumatic device includes a blocking portion 16, the piston rod 172 is penetrated by the blocking portion 16, and the piston rod 172 and the blocking portion 16 are slidably matched, the blocking portion 16 includes a step hole 161, the piston rod 172 is penetrated by the step hole 161, the wall portion corresponding to the step hole 161 includes a first step 1611 and a second step 1612, the pneumatic device includes a sealing portion 010 and a stop portion 011, the first step 1611 has a first top wall 1610, along the moving direction of the piston head 171, the sealing portion 010 is limited between the first top wall 1610 and the stop portion 011, the second step 1612 has a second top wall 1613, the stop portion 011 abuts against the second top wall 1613, and the stop portion 011 abuts against the step side wall 1614 corresponding to the step hole 161.

[0055] Such a pneumatic device limits the sealing portion 010 between the first top wall 1610 and the stop portion 011 , the stop portion 011 abuts against the second top wall 1613 , and the stop portion 011 abuts against the step side wall 1614 corresponding to the step hole 161 , thereby limiting the sealing portion 010 .

[0056] A method for manufacturing a pneumatic device, the method comprising the following steps:

[0057] A cylinder 1 is provided, the cylinder 1 comprises a cylinder body 11 and a piston assembly 17, the cylinder 1 comprises an accommodating chamber 18, the piston assembly 17 comprises a piston head 171, the piston head 171 is located in the accommodating chamber 18, and the cylinder body 11 has a first outer wall portion 121;

[0058] Providing a control valve 2;

[0059] The control valve 2 and the first outer wall portion 121 are limited or fixed.

[0060] Such a manufacturing method of a pneumatic device provides a cylinder 1, wherein the cylinder 1 includes a cylinder body 11 and a piston assembly 17, wherein the cylinder 1 includes an accommodating chamber 18, and the piston assembly 17 includes a piston head 171, wherein the piston head 171 is located in the accommodating chamber 18, and the cylinder body 11 has a first outer wall portion 121; a control valve 2 is provided; and the control valve 2 and the first outer wall portion 121 are limitedly set or fixed. Compared with the background technology, the assembly of other intermediate parts, such as the installation of the air circuit plate 3' with the cylinder 1' and the control valve 2', is avoided, and the installation process is relatively simple.

[0061] In one embodiment, a substrate is provided, wherein the material of the substrate is metal; a cylinder body blank is processed by an integral molding method; in this way, material waste is reduced.

[0062] It should be noted that the one-piece molding method refers to the process of producing an integrated structure through a mold.

[0063] For example, the material of the substrate may be aluminum, and the one-piece forming method may be an aluminum die-casting production process. The surface accuracy of the produced cylinder blank does not meet the assembly requirements with other parts, and further machining is required.

[0064] After the cylinder blank is processed by integral molding, the cylinder side wall 15 is processed by machining, and at least part of the cylinder side wall 15 extends in the direction of the piston head 171. For example, the wall surface corresponding to the cylinder blank can be polished by turning or milling to meet the matching requirements of the cylinder side wall 15 and the piston head 171;

[0065] After the cylinder blank is processed by integral molding, the first outer wall portion 121 is processed by machining. For example, the surface of the wall corresponding to the cylinder blank can be polished by milling to meet the requirements that the surface corresponding to the first outer wall portion 121 of the cylinder is a plane, so as to meet the assembly requirements of the first outer wall portion 121 and the control valve 2. More specifically, the surface corresponding to the first outer wall portion 121 is a plane.

[0066] After the cylinder blank is processed by integral molding, the gas path 13 is processed by machining, and the gas path 13 connects the accommodating chamber 18 and the working channel 20 of the control valve 2. For example, the gas path 13 can be processed on the cylinder blank by drilling or milling to meet the gas path requirements of the pneumatic device.

[0067] In one embodiment, a substrate is provided, the material of the substrate is metal, and the cylinder body 11 is processed by an integral molding method, thereby reducing the waste of materials.

[0068] It should be noted that the one-piece molding method refers to the process of producing an integrated structure through a mold.

[0069] For example, the material of the substrate may be aluminum, and the one-piece forming method may be an aluminum die-casting production process. The surface accuracy of the produced cylinder body meets the assembly requirements with other parts, and the cylinder body 11 is assembled with other parts.

[0070] In one embodiment, a substrate is provided, the material of the substrate is metal, and the cylinder body 11 is machined. In this way, the machining accuracy is higher.

[0071] For example, the material of the substrate may be aluminum, and the substrate may be in the form of an aluminum ingot. The cylinder body 11 is machined to meet the assembly requirements of the cylinder body 11 and other parts.

[0072] In one embodiment, a substrate is provided, the material of the substrate is plastic, and the cylinder body 11 is processed by an integral molding method. In this way, the material cost is lower.

[0073] It should be noted that the one-piece molding method refers to the process of producing an integrated structure through a mold.

[0074] For example, the material of the substrate may be aluminum, and the one-piece molding method may be a plastic injection molding production process to meet the assembly requirements of the cylinder body 11 and other parts.

[0075] In one embodiment, the control valve 2 and the first outer wall portion 121 are limited or fixed, and the control valve and the first outer wall portion 121 can be connected by bolts; or the control valve 2 and the first outer wall portion 121 are welded to meet the assembly requirements of the control valve and the cylinder body.

[0076] In one embodiment, a blocking portion 16 is provided; the blocking portion 16 and the cylinder body 11 are assembled; a piston rod 172 is provided; the blocking portion 16 and the piston rod 172 are assembled; the piston rod 172 is passed through the blocking portion 16; a first limiting portion 3 and a second limiting portion 4 are provided; the blocking portion 16 and the first limiting portion 3 are abutted, and the second limiting portion 4 and the cylinder body 11 are assembled so that the second limiting portion and the cylinder body are limitedly arranged; the blocking portion 16 is limited between the first limiting portion 3 and the second limiting portion 4.

[0077] The manufacturing method of such a pneumatic device comprises providing a first limiting portion 3 and a second limiting portion 4; abutting the blocking portion 16 against the first limiting portion 3, and assembling the second limiting portion 4 and the cylinder body 11; so that the blocking portion 16 is limited between the first limiting portion 3 and the second limiting portion 4, thereby achieving the limitation of the blocking portion 16.

[0078] It should be noted that the second limiting portion and the cylinder limiting setting can be understood as the second limiting portion 4 and the cylinder 11 are detachable. After the second limiting portion 4 is removed from the cylinder 11, in the direction of piston head movement, when the blocking portion 16 loses the limit in one direction, the blocking portion 16 can be removed from that direction.

[0079] Provide a stopper 011 and a sealing part 010; assemble the stopper 011, the sealing part 010 and the plugging part 16, the plugging part 16 includes a step hole 161, and the wall corresponding to the step hole 161 includes a first step 1611 and a second step 1612; the first step 1611 has a first top wall 1610, and the second step 1612 has a second top wall 1613; press the stopper 011 into the step hole 161, so that the stopper 011 abuts against the step side wall 1614 corresponding to the step hole 161, and the stopper 011 abuts against the second top wall 1613; after the stopper 011, the sealing part 010 and the plugging part 16 are assembled, the sealing part 010 is limited between the first top wall 1610 and the stopper 011. In this way, the limit setting of the sealing part is realized.

[0080] It should be noted that: although this specification has described the present invention in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify, combine or replace the present invention with equivalents, and all technical solutions and improvements thereto that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A pneumatic device, comprising a cylinder (1) and a control valve (2), characterized in that: The cylinder (1) comprises a cylinder body (11) and a piston assembly (17); the cylinder (1) comprises a receiving chamber (18); the piston assembly (17) comprises a piston head (171); the piston head (171) is located in the receiving chamber (18); the cylinder body (11) comprises a first outer wall portion (121); the control valve (2) is limitedly arranged or fixed to the first outer wall portion (121); the cylinder body (11) comprises an air passage (13); the control valve comprises a working passage (20); the air passage (13) connects the receiving chamber (18) and the working passage (20).

2. The pneumatic device according to claim 1, characterized in that: The gas path channel (13) comprises an inner port (130) and an outer port (133), wherein the inner port (130) is located on an inner wall corresponding to the accommodating cavity (18), and the outer port (133) is located on the first outer wall portion (121); the working channel (20) has a valve working port (23), and the outer port (133) is in communication with the valve working port (23).

3. The pneumatic device according to claim 2, characterized in that: The cylinder body (11) comprises a cylinder body side wall (15), at least a portion of the cylinder body side wall (15) extends along the moving direction of the piston head (171), the cylinder body side wall (15) and the piston head (171) are slidably matched, the cylinder body (11) comprises a platform portion (12), the platform portion (12) protrudes from the cylinder body side wall (15), the first outer wall portion (121) is at least a portion of the platform portion (12), and the first outer wall portion (121) is arranged away from the cylinder body side wall (15).

4. The pneumatic device according to claim 3, characterized in that: The first position (7) and the second position (8) are defined as two extreme positions of the piston head (171) in the moving direction, and the third position (9) is defined as any position along the moving direction of the piston head (171) at which the piston head (171) is located between the first position (7) and the second position (8); when the piston head (171) is located at the third position (9), the accommodating chamber (18) comprises a first space (181) and a second space (182), and along the moving direction of the piston head (171), the first space (181) and the second space (182) are respectively located on both sides of the piston head (171), and the inner port (130) comprises a first inner port (131) and a second inner port (132), and the first inner port (131) is located at a cylinder side wall (15) corresponding to the first space (181), and the second inner port (132) is located at a cylinder side wall (15) corresponding to the second space (182).

5. The pneumatic device according to claim 4, characterized in that: The cylinder body (11) comprises a piston bottom wall (14). Along the moving direction of the piston head (171), the piston bottom wall (14) and the piston head (171) are arranged opposite to each other. The piston head (171) comprises a piston side wall (1711) which is slidably matched with the cylinder body side wall (15). The piston head (171) comprises a first recessed portion (1712). The first recessed portion (1712) is located on a side of the piston side wall (1711) facing the piston bottom wall (14). In the radial direction of the piston head, the first recessed portion (1712) is recessed in the piston side wall (1711). The piston head (171) comprises a first end wall (1713). The first end wall (1713) is opposite to the piston bottom wall (14). The piston head (171) comprises a second recessed portion (1714). The second recessed portion (1714) is recessed in the first end wall (1713).

6. The pneumatic device according to claim 5, characterized in that: When the piston head (171) is located at the first position (7), the first end wall (1713) abuts against the cylinder bottom wall (14); when the piston head (171) is located at the first position (7), the cylinder (1) comprises a first channel (19); a wall portion corresponding to the first channel (19) comprises the first recessed portion (1712), the second recessed portion (1714) and a wall portion corresponding to the cylinder (11); when the piston head (171) is located at the first position (7), the first channel (19) and the first inner port (131) are in communication.

7. The pneumatic device according to any one of claims 3 to 6, characterized in that: The pneumatic device comprises a first limiting portion (3) and a second limiting portion (4), the pneumatic device comprises a blocking portion (16), and the piston assembly (17) comprises a piston rod (172), the piston rod (172) is passed through the blocking portion (16), and along the moving direction of the piston head (171), at least part of the blocking portion (16) is limited between the first limiting portion (3) and the second limiting portion (4), and along the moving direction of the piston head (171), the first limiting portion (3) is closer to the piston head (171) than the second limiting portion (4), and the second limiting portion (4) is limited to the cylinder body (11).

8. The pneumatic device according to claim 7, characterized in that: The cylinder side wall (15) comprises a first section (151) and a second section (152); the inner diameter corresponding to the first section (151) is smaller than the inner diameter corresponding to the second section (152); the piston head (171) and the first section (151) are slidably matched; the blocking portion (16) and the second section (152) are in abutment with each other; the cylinder side wall (15) comprises a transition portion, the transition portion connects the first section (151) and the second section (152); the transition portion is the first limiting portion (3); the second limiting portion (4) is a retaining spring; the cylinder (11) comprises a first groove; the second limiting portion (4) is limited in the first groove.

9. The pneumatic device according to any one of claims 1 to 3, characterized in that: The piston assembly (17) comprises a piston rod (172), the pneumatic device comprises a blocking portion (16), the piston rod (172) is inserted into the blocking portion (16), and the piston rod (172) and the blocking portion (16) are slidably matched, the blocking portion (16) comprises a step hole (161), the piston rod (172) is inserted into the step hole (161), and the wall portion corresponding to the step hole (161) comprises a first step (1611) and a second step (1612), and the pneumatic device comprises a sealing portion (0 10) and a stop portion (011), the first step (1611) has a first top wall (1610), along the moving direction of the piston head (171), the sealing portion (010) is limited between the first top wall (1610) and the stop portion (011), the second step (1612) has a second top wall (1613), the stop portion (011) abuts against the second top wall (1613), and the stop portion (011) abuts against the step side wall (1614) corresponding to the step hole (161).

10. A method for manufacturing a pneumatic device, characterized in that: The manufacturing method of the pneumatic device comprises the following steps: A cylinder is provided, wherein the cylinder (1) comprises a cylinder body (11) and a piston assembly (17), the cylinder (1) comprises a receiving chamber (18), the piston assembly (17) comprises a piston head (171), the piston head (171) is located in the receiving chamber (18), and the cylinder body (11) has a first outer wall portion (121); Providing a control valve (2); The control valve (2) and the first outer wall portion (121) are positioned or fixed.

11. The method for manufacturing a pneumatic device according to claim 10, characterized in that: A cylinder body blank is manufactured by an integral molding method, or a cylinder body (11) is directly manufactured by an integral molding method.

12. The method for manufacturing a pneumatic device according to claim 11, characterized in that: A substrate is provided, wherein the material of the substrate is metal, and a cylinder body blank is processed by an integral molding method.

13. The method for manufacturing a pneumatic device according to claim 12, characterized in that: After the cylinder body blank is processed by one-piece molding, the cylinder body side wall (15) is processed by machining, and at least a part of the cylinder body side wall (15) extends along the moving direction of the piston head (171); and / or, after the cylinder body blank is processed by one-piece molding, the first outer wall portion (121) is processed by machining.

14. The method for manufacturing a pneumatic device according to claim 12, characterized in that: After the cylinder body blank is processed by integral molding, an air passage (13) is processed by machining, and the air passage (13) connects the accommodating cavity (18) and a working passage (20) corresponding to the control valve (2).

15. The method for manufacturing a pneumatic device according to claim 11, characterized in that: A substrate is provided, wherein the material of the substrate is plastic, and a cylinder body (11) is processed by an integral molding method.

16. The method for manufacturing a pneumatic device according to claim 10, characterized in that: A substrate is provided, wherein the substrate is made of metal, and the cylinder body (11) is machined by machining.

17. The method for manufacturing a pneumatic device according to any one of claims 10 to 16, characterized in that: The control valve and the first outer wall portion (121) are connected by bolts; or the control valve (2) and the first outer wall portion (121) are welded.

18. The method for manufacturing a pneumatic device according to any one of claims 10 to 16, characterized in that: Providing a blocking portion (16); Assembling the blocking portion (16) and the cylinder body (11); Providing a piston rod (172); Assembling the blocking portion (16) and the piston rod (172); inserting the piston rod (172) into the blocking portion (16); Providing a first limiting portion (3) and a second limiting portion (4); The blocking portion (16) is brought into contact with the first limiting portion (3), and the second limiting portion (4) is assembled with the cylinder body (11), so that the second limiting portion and the cylinder body are limitedly arranged; and the blocking portion (16) is limitedly positioned between the first limiting portion (3) and the second limiting portion (4).

19. The method for manufacturing a pneumatic device according to claim 18, characterized in that: Providing a stopper (011) and a sealing portion (010); Assembling the stopper (011), the sealing portion (010) and the blocking portion (16), wherein the blocking portion (16) comprises a step hole (161), and the wall portion corresponding to the step hole (161) comprises a first step (1611) and a second step (1612); the first step (1611) has a first top wall (1610), and the second step (1612) has a second top wall (1613); pressing the stopper (011) into the step hole (161) so that the stopper (011) abuts against a step side wall (1614) corresponding to the step hole (161), and the stopper (011) abuts against the second top wall (1613); After the stopper (011), the sealing portion (010) and the blocking portion (16) are assembled, the sealing portion (010) is located between the first top wall (1610) and the stopper (011).

Images