A cylinder

Abstract

This invention provides a cylinder, relating to the field of automated equipment, comprising a cylinder body, a piston assembly, and a support portion. The cylinder body and the support portion are arranged along a first direction, and the piston rod of the piston assembly and the support portion are fixedly disposed. The support portion is provided with a receiving space, and a first opening of the receiving space is disposed on the wall of the support portion facing the cylinder body. A protrusion protrudes from the cylinder body along the first direction, passes through the first opening, and at least a portion of the protrusion is located in the receiving space. An adjusting screw is located at one of the protrusion and the support portion, and is axially limited to the other along the piston rod, thereby forming a limit within the receiving space. Compared with the prior art, this avoids spatial interference with the cylinder port, pipelines, and load.

Description

Technical Field

[0001] This invention relates to the field of automated equipment, specifically to a cylinder. Background Technology

[0002] In automated equipment, cylinders used to provide linear driving force often require precise limitation of the extension stroke of their piston rods or slides. Currently, the conventional method to achieve this function is to set a limit block on the side of the cylinder body and a corresponding stop block on the side of the moving part. The movement is blocked by the mechanical collision between the two, and the limit position is changed by adjusting the thread.

[0003] However, this side-stop adjustment structure, with the limiting component located on the side of the cylinder, is prone to spatial interference with the cylinder's air port and pipelines. Furthermore, the impact point between the stop block and the limiting component deviates from the central axis of the cylinder's movement, generating a deflection torque, reducing operational smoothness, and accelerating wear, thereby affecting the cylinder's ease of installation and operational reliability. The above statements are merely for providing background information related to this application and do not necessarily constitute prior art. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a cylinder that solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cylinder comprising a cylinder body, a piston assembly, and a support portion, wherein the cylinder body and the support portion are arranged along a first direction, and the piston rod of the piston assembly and the support portion are fixedly disposed; the support portion is provided with a receiving space, and a first opening of the receiving space is disposed on the wall of the support portion facing the cylinder body; the cylinder has a protrusion and an adjusting screw; the protrusion protrudes from the cylinder body along the first direction, and the protrusion is fixedly disposed with or integrally formed with the cylinder body, the protrusion passes through the first opening, at least a portion of the protrusion is located in the receiving space, and the adjusting screw is located on one of the protrusion and the support portion, and is axially limited to the other along the piston rod.

[0006] This invention provides a cylinder with the following beneficial effects: The present invention provides a first opening in the accommodating space located on the wall of the bearing portion facing the cylinder body. The protrusion protrudes from the cylinder body along the first direction, passes through the first opening, and at least a portion of the protrusion is located in the accommodating space. The adjusting screw is located on one of the protrusion and the bearing portion, and is axially limited along the piston rod with the other, thereby forming a limit within the accommodating space. Compared with the prior art, this avoids spatial interference with the cylinder port, pipelines, and load. Attached Figure Description

[0007] Figure 1 This is an isometric schematic diagram of a cylinder according to one embodiment; Figure 2 for Figure 1 A cross-sectional view of the cylinder with the piston rod in the retracted position; Figure 3 for Figure 1 Axonometric view of a cylinder with the piston rod extended; Figure 4 for Figure 1 Side view of the cylinder with the piston rod in the retracted position; Figure 5 For along Figure 4 A cross-sectional view of an embodiment obtained by sectioning along the AA direction; Figure 6 A cross-sectional view of the internal structure of the accommodating space according to another embodiment; Figure 7 This is a cross-sectional view of the accommodating space in one embodiment.

[0008] In the figure: 20, slide; 21, bearing part; 22, connecting part; 30, cylinder body; 40, floating nut; 60, piston assembly; 70, piston rod; 80, protrusion; 100, adjusting screw; 101, limiting part; 102, nut; 103, first end; 110, accommodating space; 111, first opening; 112, second opening; 113, first groove; 114, first wall; 115, second wall; 116, piston chamber; 117, rod chamber; 118, rodless chamber. Detailed Implementation

[0009] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments are further described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0010] like Figure 1-7 As shown, this is a cylinder provided in an embodiment of the present invention. It should be noted that, in the following text, the first direction X is the arrangement direction of the cylinder body 30 and the bearing part 21, the second direction Y is the width direction perpendicular to the first direction X, and the axial direction of the piston rod 70 is perpendicular to both the first direction X and the second direction Y.

[0011] like Figure 1 and Figure 5As shown, in one embodiment, the cylinder includes a cylinder body 30, a piston assembly 60, a slide 20, and a floating nut 40. The slide includes a support portion 21 and a connecting portion 22. The cylinder body 30 and the support portion 21 are arranged along a first direction X. The piston assembly 60 includes a piston rod 70. One end of the piston rod 70 extending out of the cylinder body 30 is fixedly connected to the connecting portion 22 via the floating nut 40. The slide 20 includes a support portion 21 and a connecting portion 22. The support portion 21 and the connecting portion 22 are bent. The support portion 21 is provided with a receiving space 110. The receiving space 110 can be a through-bearing space along the first direction X. The through hole of the carrier 21 can also be the first groove on the carrier 21, with its first opening 111 facing the cylinder body 30. The protrusion 80 protrudes from the cylinder body 30 along the first direction X. The protrusion 80 is integrally formed with the cylinder body 30 or fixed by fasteners. The protrusion 80 passes through the first opening 111 and enters the receiving space 110. The adjusting screw 100 is threadedly engaged with the carrier 21. The first end 103 of the adjusting screw 100 extends into the receiving space 110 and is set opposite to the protrusion 80 along the axial direction of the piston rod 70. The nut 102 is threadedly engaged with the adjusting screw 100 and is located outside the receiving space 110.

[0012] Furthermore, the assembly process is as follows: Install the protrusion 80 on the cylinder body 30, screw the adjusting screw 100 into the threaded hole of the bearing part 21, adjust the length of the adjusting screw 100 extending into the receiving space 110 along the axial direction of the piston rod 70, thereby adjusting the position of the first end 103 along the axial direction of the piston rod 70, then tighten the nut 102 onto the adjusting screw 100 and fit it against the outside of the bearing part 21, and finally connect the piston rod 70 and the connecting part 22 of the slide 20 through the floating nut 40. When the protrusion 80 and the cylinder body 30 are an integral structure, the assembly process can be reduced; when the protrusion 80 is an independent part, it can be fixed to the cylinder body 30 by bolts or welding.

[0013] Specifically, the dynamic working process is as follows: Compressed air enters the piston chamber 116 of the cylinder body 30, pushing the piston rod 70 of the piston assembly 60 to extend axially. The piston rod 70 drives the slide 20 and the bearing part 21 to move axially along the piston rod 70 through the floating nut 40. The bearing part 21 drives the adjusting screw 100 to move together. When the first end 103 of the adjusting screw 100 abuts against the protrusion 80, the bearing part 21 stops extending, realizing the extension stroke limit. By rotating the adjusting screw 100, the length of the adjusting screw 100 extending into the receiving space 110 is changed, thereby changing the distance between the first end 103 of the adjusting screw 100 and the protrusion 80, thus adjusting the extension stroke.

[0014] It is worth noting that when the accommodating space 110 is a through hole, the protrusion 80 can extend into the first opening 111 and even pass through the second opening 112; when the accommodating space 110 is a groove, the protrusion 80 only extends into the first opening 111. The protrusion 80 and the cylinder body 30 can be an integral structure or a separate fixed structure. The separate fixed structure can be achieved by means of bolts, pins, welding or snap-fitting. The first end 103 of the adjusting screw 100 can directly abut against the protrusion 80, or a wear-resistant shim can be set at the corresponding position of the protrusion 80.

[0015] Furthermore, this embodiment has the following technical effects: the adjusting screw 100 is located on the bearing part 21, and the adjustment position is at the rear end or outside of the bearing part 21, away from the air port and pipeline, to avoid interference; the impact point is located inside the receiving space 110, the lever arm is short, and the deflection torque is small; the nut 102 is located outside the receiving space 110, which facilitates the locking operation.

[0016] like Figure 6 As shown, specifically, in another embodiment, the adjusting screw 100 is mounted on the protrusion 80. The protrusion 80 is fixedly disposed with the cylinder body 30 or is an integral structure. The integral structure helps to reduce the number of fixing screws between the protrusion 80 and the cylinder body 30. To allow the adjusting screw 100 to pass through the protrusion 80, the adjusting screw 100 is threadedly engaged with the protrusion 80. At least a portion of the adjusting screw 100 is located within the receiving space 110. The corresponding wall of the receiving space 110 is provided with a limiting part 101. The first end 103 of the adjusting screw 100 and the limiting part 101 are arranged opposite to each other along the axial direction of the piston rod 70. The nut 102 is threadedly engaged with the adjusting screw 100 and is located within the receiving space 110 along the axial direction of the piston rod 70. The nut 102 and the first end 103 are located on both sides of the protrusion 80.

[0017] Further, the assembly process is as follows: a threaded hole is machined on the protrusion 80, and the adjusting screw 100 is screwed into the threaded hole of the protrusion 80, so that the adjusting screw 100 changes the length of the protrusion 80 extending or extending along the axial direction of the piston rod 70, thereby adjusting the distance between the first end 103 and the limiting part 101. The nut 102 is screwed on the adjusting screw 100 in the receiving space 110 and fits against the side of the protrusion 80 facing away from the first end 103. The adjusting screw 100 is locked, and the protrusion 80 passes through the first opening 111 of the bearing part 21 and enters the receiving space 110. The piston rod 70 and the connecting part 22 are connected by the floating nut 40.

[0018] Specifically, the dynamic working process is as follows: compressed air pushes the piston assembly 60, and the piston rod 70 drives the bearing part 21 to extend along the axial direction of the piston rod 70. When the bearing part 21 moves, the wall of the accommodating space 110 moves synchronously with the bearing part 21. When the limiting part 101 moves to abut against the first end 103 of the adjusting screw 100, the bearing part 21 stops extending. By rotating the adjusting screw 100, the length of the adjusting screw 100 extending into or out of the protrusion 80 along the axial direction of the piston rod 70 is changed, thereby adjusting the distance between the first end 103 and the limiting part 101, and thus adjusting the stroke.

[0019] It should be noted that the protrusion 80 can also be fixed separately from the cylinder body 30. In this case, a threaded hole can be provided on the protrusion 80. The limiting part 101 can be a stepped surface, protrusion, or stop on the wall of the receiving space 110, or it can be directly formed by the end wall of the receiving space 110. The receiving space 110 can also be a through hole or a groove.

[0020] Furthermore, this embodiment has the following technical effects: the adjusting screw 100 is located on the protrusion 80, the protrusion 80 is fixed or integral with the cylinder body 30, and the protrusion 80 is at least partially located within the receiving space 110, that is, the adjusting screw 100 is located within the receiving space 110, which is suitable for occasions where the rear end space of the bearing part 21 is limited; the nut 102 is located within the receiving space 110 and does not occupy external space; the limiting part 101 abuts against the first end 103 of the adjusting screw 100, which also makes the impact point located inside and reduces the deflection torque.

[0021] like Figures 1 to 4 As shown, specifically, based on any of the aforementioned embodiments, the piston assembly 60 may include at least two piston rods 70. The two piston rods 70 are distributed along a second direction Y, which is perpendicular to the first direction X and perpendicular to the axial direction of the piston rods 70. The two piston rods 70 extend out of their respective piston chambers 116 in the same direction, and the rodless chambers 118 of the two piston chambers 116 are interconnected, as are the rod chambers 117 of the two piston chambers 116. Thus, when compressed air enters the two rodless chambers 118 simultaneously, the two piston rods 70 extend synchronously, driving the slide 20 to move smoothly through the bearing part 21. The stroke limit can be achieved through any of the aforementioned adjustment screws 100 and protrusions 80.

[0022] Furthermore, the assembly process is as follows: two piston rods 70 are respectively installed into the two piston chambers 116 of the cylinder body 30. The protruding ends of the two piston rods 70 are connected to the connecting part 22 of the slide table 20 and can be fixed by the floating nut 40. The rodless chambers 118 of the two piston chambers 116 are interconnected through the flow channel inside the cylinder body 30 or the external pipeline. The rod chambers 117 of the two piston chambers 116 are interconnected through the flow channel inside the cylinder body 30 or the external pipeline. Then, the stroke limit mechanism is installed in the aforementioned manner.

[0023] Specifically, the dynamic working process is as follows: Compressed air enters the two rodless chambers 118, and the two piston rods 70 extend synchronously, driving the bearing part 21 to move. When the first end 103 of the adjusting screw 100 abuts against the protrusion 80 or the limiting part 101, the bearing part 21 stops. Since the rodless chambers 118 are interconnected, the two piston rods 70 are subjected to balanced force and have good synchronization. During the return stroke, compressed air enters the two rod chambers 117, and the two piston rods 70 retract synchronously.

[0024] It is worth noting that there can be two or more piston rods 70, which are distributed sequentially along the second direction Y; the rodless chambers 118 can be connected through internal flow channels or external pipe joints; in addition to the floating nut 40, the connection between the piston rod 70 and the connecting part 22 can also be achieved by threaded connection, snap ring or welding.

[0025] like Figure 7 As shown, specifically regarding the clearance fit between the first wall portion 114, the second wall portion 115, and the protrusion 80, it should be noted that the protrusion 80, after passing through the first opening 111, is located within the receiving space 110. In the second direction Y, the two sides of the protrusion 80 are respectively opposite to the first wall portion 114 and the second wall portion 115. Both the first wall portion 114 and the second wall portion 115 extend along the axial direction of the piston rod 70, forming a guide channel adapted to the protrusion 80. Gaps are left between the protrusion 80 and the first wall portion 114, and between the protrusion 80 and the second wall portion 115, so that when the bearing portion 21 moves along the axial direction of the piston rod 70, the first wall portion 114 and the second wall portion 115 can slide relative to each other along the two sides of the protrusion 80, and the protrusion 80 will not cause jamming of the axial movement of the bearing portion 21.

[0026] Since the protrusion 80 is in clearance fit with the first wall portion 114 and the second wall portion 115, and the clearance is small, when the bearing portion 21 is subjected to a torsional moment around the axis of the piston rod 70 or a lateral force along the second direction Y, the first wall portion 114 and the second wall portion 115 can abut against the corresponding side of the protrusion 80, restricting the rotation and lateral displacement of the bearing portion 21, thereby improving the smoothness of movement and the guiding accuracy of the bearing portion 21.

[0027] It is worth noting that the accommodating space 110 is offset to one side of the center position of the bearing portion 21 along the second direction Y, so that the first wall portion 114 is close to the central region of the bearing portion 21, and the central region of the bearing portion 21 remains continuous and intact, which is beneficial to maintaining the rigidity and load-bearing capacity of the bearing portion 21. The clearance fit between the protrusion 80 and the first wall portion 114 and the second wall portion 115, without adding additional guiding elements, simultaneously achieves the guiding function using the stroke limiting structure, making the structure more compact.

[0028] Specifically, the size of the gap between the protrusion 80 and the first wall portion 114 and the second wall portion 115 can be determined according to the processing accuracy, the coefficient of thermal expansion of the material, and the guiding accuracy requirements. It is preferable that the bearing portion 21 moves smoothly along the axial direction of the piston rod 70 without jamming or excessive lateral swaying within the operating temperature range. To improve wear resistance and service life, wear-resistant coatings, lubricating coatings, or wear-resistant inserts can also be provided on the corresponding sides of the first wall portion 114, the second wall portion 115, and the protrusion 80.

[0029] Specifically, the slide table 20 includes a support part 21 and a connecting part 22, both of which are bent. The connecting part 22 is located at one end of the cylinder body 30 and is used to connect with the piston rod 70. The floating nut 40 is sleeved on the end of the piston rod 70 and can be floated and adjusted, and then fixed to the connecting part 22. In this way, even if there is a coaxiality error between the piston rod 70 and the mounting hole of the connecting part 22, the floating nut 40 can compensate for it, avoid jamming, and improve assembly performance and running stability.

[0030] It is worth noting that the piston rod 70 and the connecting part 22 can also be connected by a rigid thread, a tapered surface fit, or an elastic element, but the floating nut 40 is the preferred option.

[0031] Furthermore, the shape of the protrusion 80 is not limited to square or rectangular, but can be cylindrical, T-shaped or L-shaped, as long as it passes through the first opening 111 and can cooperate with the adjusting screw 100 or the limiting part 101 for limiting. The adjusting screw 100 can be in the form of internal hexagon, external hexagon or slotted screw, etc., for easy rotation and adjustment. The nut 102 can be a standard hexagonal nut, flange nut or lock nut. The accommodating space 110 can be a through hole, blind groove, U-shaped groove or rectangular groove, etc. The cylinder body 30 can be a cylinder barrel with a piston chamber 116 inside. The piston assembly 60 includes a piston and a piston rod 70.

Claims

1. A cylinder, characterized in that, The cylinder includes a cylinder body (30), a piston assembly (60), and a support portion (21). The cylinder body (30) and the support portion (21) are arranged along a first direction X. The piston rod (70) of the piston assembly (60) and the support portion (21) are fixedly disposed. The support portion (21) is provided with a receiving space (110), and the first opening (111) of the receiving space (110) is disposed on the wall of the support portion (21) facing the cylinder body (30). The cylinder has a protrusion (80) and an adjustment... Adjusting screw (100); the protrusion (80) protrudes from the cylinder body (30) along the first direction X, the protrusion (80) is fixedly disposed or integrally structured with the cylinder body (30), the protrusion (80) passes through the first opening (111), at least a portion of the protrusion (80) is located in the receiving space (110), the adjusting screw (100) is located in one of the protrusion (80) and the bearing part (21), and is axially limited to the other along the piston rod (70).

2. The cylinder according to claim 1, characterized in that, The accommodating space (110) includes a second opening (112). The accommodating space (110) is a through hole that penetrates the bearing portion (21) along the first direction X. The first opening (111) is one port of the through hole, and the second opening (112) is the second port of the through hole.

3. The cylinder according to claim 1, characterized in that, The bearing part (21) is provided with a first groove (113), the accommodating space (110) is the groove of the first groove (113), and the first opening (111) is the opening of the first groove (113).

4. The cylinder according to claim 1, characterized in that, The wall portion corresponding to the receiving space (110) includes a first wall portion (114) and a second wall portion (115). The first wall portion (114) and the second wall portion (115) extend along the axial direction of the piston rod (70) and define a second direction Y. The second direction Y is perpendicular to the first direction X and the axial direction of the piston rod (70). The receiving space (110) is offset from the center position of the bearing portion (21) along the second direction Y. The protrusion (80) is located between the first wall portion (114) and the second wall portion (115) along the second direction Y. The first wall portion (114) is located on the side of the protrusion (80) close to the center position of the bearing portion (21). The first wall portion (114) is clearance-fitted with the protrusion (80), and the second wall portion (115) is clearance-fitted with the protrusion (80).

5. The cylinder according to any one of claims 1 to 4, characterized in that, The adjusting screw (100) is located on the bearing part (21). The adjusting screw (100) is threadedly engaged with the bearing part (21). The adjusting screw (100) has a first end (103) that extends into the receiving space (110) along the axial direction of the piston rod (70). The first end (103) is disposed opposite to the protrusion (80). When the adjusting screw (100) moves with the bearing part (21) to abut against the protrusion (80), it restricts the extension stroke of the bearing part (21).

6. The cylinder according to claim 5, characterized in that, The cylinder includes a nut (102) that is threadedly engaged with the adjusting screw (100), and the nut (102) is located outside the receiving space (110).

7. The cylinder according to any one of claims 1 to 4, characterized in that, The adjusting screw (100) is located on the protrusion (80), and the adjusting screw (100) and the protrusion (80) are threaded together. At least a portion of the adjusting screw (100) is located in the receiving space (110). The cylinder includes a limiting part (101), which is located on the wall of the receiving space (110). The adjusting screw (100) has a first end (103), which is arranged opposite to the limiting part (101) along the axial direction of the piston rod (70). When the bearing part (21) moves to the point where the limiting part (101) and the first end (103) abut, the first end (103) restricts the extension stroke of the bearing part (21).

8. The cylinder according to claim 7, characterized in that, The cylinder includes a nut (102) that is threadedly engaged with the adjusting screw (100). The nut (102) is located in the receiving space (110) along the axial direction of the piston rod (70). The nut (102) and the first end (103) are located on both sides of the protrusion (80).

9. The cylinder according to claim 1, characterized in that, The cylinder includes a slide (20) and a floating nut (40). The slide (20) includes a bearing part (21) and a connecting part (22). The bearing part (21) and the connecting part (22) are bent along the axial direction of the piston rod (70). The connecting part (22) is located at one end of the cylinder body (30). The floating nut (40) is fixedly connected to the connecting part (22) and the piston rod (70).

10. The cylinder according to claim 7, characterized in that, The piston assembly (60) includes at least two piston rods (70), defining a second direction Y, which is perpendicular to the first direction X and perpendicular to the axial direction of the piston rods (70). The at least two piston rods (70) are distributed along the second direction Y. The cylinder includes piston chambers (116) matching the number of piston rods (70). The at least two piston rods (70) extend from their respective piston chambers (116) in the same direction. The rodless chambers (118) of the piston chambers (116) are interconnected, and the rod chambers (117) of the piston chambers (116) are interconnected.

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