Buffer cylinder
By designing a buffer cylinder that matches the piston rod with the buffer ramp, the problem of buffer jerking was solved, thereby improving buffer stability and production efficiency, and increasing the sand mold forming rate and yield.
Patent Information
- Application Number
- CN202422733094.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-08
AI Technical Summary
The existing buffer cylinder suffers from a sudden change in air pressure at the end of its stroke, resulting in a high rate of sand mold damage, long repair and replacement time, and low production efficiency.
A buffer cylinder is designed, which uses a piston component including a piston body and a piston rod. The piston rod cooperates with a buffer inclined surface. By controlling the ratio between the piston rod, the main body section and the buffer inclined surface, the buffer stroke and time are increased, the sudden rise of terminal pressure is suppressed, smooth exhaust is achieved and the jerking sensation is reduced.
It improves buffer stability, reduces jerking sensation, lowers labor input, increases sand mold forming rate and production efficiency, and improves product yield.
Smart Images
Figure CN223536660U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of buffer devices, and more specifically, to a buffer cylinder. Background Art
[0002] A cylinder is a commonly used telescopic drive mechanism in the field of machining. A cylinder includes a cylinder barrel, end caps, a piston, and a piston rod. When the piston rod drives the piston to move within the cylinder barrel, in order to avoid hard contact between the piston and the end cap, it is necessary to provide buffering for the piston.
[0003] Currently, for the cylinders used in sand mold handling, when buffering enters the cylinder and reaches the end of the stroke, due to the sharp change in air pressure, buffer jerks will occur, resulting in a relatively high damage rate of the sand molds during the sand mold handling process, an increase in maintenance and replacement time, an increase in the cost of finished products, a large amount of man-hour input, and low production efficiency.
[0004] Therefore, a buffer cylinder is needed to solve the above problems. Utility Model Content
[0005] In view of this, the purpose of this application is to propose a buffer cylinder to solve the problem of buffer jerks occurring in existing buffer cylinders.
[0006] A buffer cylinder provided by this application based on the above purpose includes:
[0007] A housing, within which a through cavity is provided;
[0008] A piston member, which is arranged within the cavity and can reciprocate within the cavity; the piston member includes: a piston main body and a piston rod. At opposite ends of the piston main body, a first buffer ring and a second buffer ring are respectively provided and are distributed symmetrically. The first buffer ring includes a main body section and a buffer section connected in sequence. The main body section is connected to the piston main body, the buffer section is connected to one end of the piston rod, and the other end of the piston rod extends outside the cavity; the buffer section has a buffer inclined surface;
[0009] The ratio of the diameter of the piston rod to the diameter of the main body section is A, and the range of A is 0.72 < A < 0.75; the ratio of the diameter of the piston rod to the length of the buffer inclined surface is B, and the range of B is 0.60 < B < 0.70; the ratio of the length of the buffer inclined surface to the diameter of the main body section is C, and the range of C is 1.09 < C.
[0010] Optionally, the value of A is 0.73; the value of B is 0.67; the value of C is 1.095.
[0011] Optionally, the diameter of the piston rod is 20 mm; the length of the buffer ramp is 30 mm; the diameter of the main body section is 27.4 mm; and the angle between the buffer ramp and the extension line of the main body section extending toward the piston rod is 7°.
[0012] Optionally, an extended buffer ring is further provided between the first buffer ring and / or the second buffer ring and the buffer body.
[0013] Optionally, the diameter of the extended buffer ring is less than or equal to the diameter of the first buffer ring.
[0014] Optionally, the piston body is provided with a plurality of buffer grooves in the circumferential direction, and the plurality of buffer grooves are arranged sequentially at intervals along the axial direction of the piston body.
[0015] Optionally, the axial widths of the plurality of buffer grooves may be the same, partially the same, or all different; at least one of the buffer grooves is provided with a buffer sealing ring.
[0016] Optionally, the housing includes: a cylinder and a front end cover and a rear end cover respectively disposed at opposite ends of the cylinder, the piston rod extending out of the cavity through the front end cover, and the piston rod being reciprocating between the front end cover and the rear end cover.
[0017] Optionally, the cylinder is a rectangular structure, and at least four corners of the rectangular structure are provided with mounting holes, which penetrate the cylinder along the axial direction of the cylinder. The front end cover and the rear end cover are respectively provided with mounting holes corresponding to the mounting holes, and fasteners are passed through the mounting holes and the mounting holes to connect the front end cover and the rear end cover to the cylinder.
[0018] Alternatively, a quick-connect component may be provided on one end of the piston rod that extends outside the cavity.
[0019] As can be seen from the above, the buffer cylinder provided in this application has the following advantages compared with the prior art: the outer shell 10 and the piston 20 cooperate with each other to realize the basic function of the cylinder. By controlling the corresponding ratio between the piston rod 24, the main body section 221 and the buffer inclined surface 223, the buffer stroke and buffer time are effectively increased, thereby suppressing the sharp rise of terminal pressure. Through smooth exhaust, a slow action is obtained, improving the smoothness of buffering, reducing the sense of jerking, and improving the stability of buffering. At the same time, this solution has a simple structure, solves the problem of buffer jerking, reduces its input time, improves the sand mold forming rate and production efficiency, and improves the product yield. Attached Figure Description
[0020] The above features and technical advantages of this application will become clearer and easier to understand from the following description of its embodiments in conjunction with the accompanying drawings.
[0021] Figure 1 This is a cross-sectional structural diagram of the buffer cylinder provided in a specific embodiment of this application;
[0022] Figure 2 for Figure 1 The diagram shows the exploded structure of the buffer cylinder.
[0023] Figure 3 for Figure 1 The diagram shows a planar structure of the buffer cylinder.
[0024] Figure 4 for Figure 1 The diagram shows the structure of the piston component.
[0025] Figure 5 for Figure 1 The diagram shows the buffer stroke curve of the buffer cylinder.
[0026] Figure 6 This is a schematic diagram of the buffer stroke curve of a cylinder provided in the prior art.
[0027] The attached figures are labeled as follows:
[0028] 10: Outer shell; 101: Cavity; 11: Cylinder; 12: Front end cover; 13: Rear end cover; 14: Fastener; 141: Tie rod; 142: Tie rod nut; 15: Quick-connect fitting; 16: Air port connector;
[0029] 20: Piston component; 21: Piston body; 211: Buffer groove; 22: First buffer ring; 221: Main body section; 222: Buffer section; 223: Buffer slope; 23: Second buffer ring; 24: Piston rod; 25: Extended buffer ring. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.
[0031] Figure 1 This is a cross-sectional structural diagram of the buffer cylinder provided in a specific embodiment of this application; Figure 2 for Figure 1 The diagram shows the exploded structure of the buffer cylinder. Figure 3 for Figure 1 The diagram shows a planar structure of the buffer cylinder. Figure 4 for Figure 1 The schematic diagram of the piston component shown is as follows; Figures 1 to 4 As shown, the buffer cylinder includes: a housing 10 and a piston 20.
[0032] The outer casing 10 has a through cavity 101.
[0033] The piston 20 is disposed inside the cavity 101 and can reciprocate within the cavity 101, that is, reciprocate linearly along the axial direction of the piston 20.
[0034] The piston component 20 includes a piston body 21 and a piston rod 24. A first buffer ring 22 and a second buffer ring 23 are respectively provided at opposite ends of the piston body 21, and are distributed in a mirror symmetrical manner. That is, the first buffer ring 22 and the second buffer ring 23 are respectively provided at opposite ends of the piston body 21 in the axial direction. The structure of the first buffer ring 22 and the structure of the second buffer ring 23 are mirror symmetrical with respect to the piston body 21.
[0035] The first buffer ring 22 includes a main body segment 221 and a buffer segment 222 connected in sequence. The main body segment 221 is connected to the piston body 21, and the buffer segment 222 is connected to one end of the piston rod 24. The other end of the piston rod 24 extends out of the cavity 101. The buffer segment 222 has a buffer slope 223. That is, one end of the piston rod 24 is connected to the end of the first buffer ring 22 away from the piston body 21, and the other end of the piston rod 24 extends out of the cavity 101.
[0036] In one embodiment of this application, the structure of the first buffer ring 22 is the same as that of the second buffer ring 23, the only difference being the position and direction of its arrangement, i.e., the two are mirror-symmetrically arranged. Specifically, the first buffer ring 22 includes a main body segment 221 and a buffer segment 222, with a buffer ramp 223 on the buffer segment 222. The second buffer ring 23 also includes a main body segment 221 and a buffer segment 222, with a buffer ramp 223 on the buffer segment 222.
[0037] The main body section 221 of the first buffer ring 22 is connected to the piston body 21, the buffer section 222 of the first buffer ring 22 is connected to one end of the piston rod 24, the other end of the piston rod 24 extends out of the cavity 101, and the buffer section 222 of the first buffer ring 22 has a buffer slope 223.
[0038] The main body section 221 of the second buffer ring 23 is connected to the piston body 21, and the buffer section 222 of the second buffer ring 23 extends away from the piston rod 24. The buffer section 222 of the second buffer ring 23 has a buffer slope 223.
[0039] Among them, the ratio value of the diameter of the piston rod 24 to the diameter of the main body section 221 is A, and the range of A is 0.72 < A < 0.75. The ratio value of the diameter of the piston rod 24 to the length of the buffer inclined surface 223 is B, and the range of B is 0.60 < B < 0.70. The ratio value of the length of the buffer inclined surface 223 to the diameter of the main body section 221 is C, and the range of C is 1.09 < C.
[0040] With the above buffer cylinder, the outer shell 10 and the piston member 20 cooperate with each other to realize the basic functions of the cylinder. By controlling the corresponding ratios among the piston rod 24, the main body section 221 and the buffer inclined surface 223, the buffer stroke and buffer time are effectively increased, thereby the sharp rise of the terminal pressure can be inhibited. Through smooth exhaust, a slow movement can be obtained, the buffer smoothness is improved, the sense of jerk is reduced, and the buffer stability is improved. At the same time, the structure of this solution is simple, the problem of buffer jerk is solved, the labor input is reduced, the sand mold forming rate and production efficiency are improved, and the product yield is improved.
[0041] The corresponding ratio values among the piston rod 24, the main body section 221 and the buffer inclined surface 223 can be set according to specific conditions. Optionally, the value of A is 0.73, the value of B is 0.67, and the value of C is 1.095. That is, the ratio value of the diameter of the piston rod 24 to the diameter of the main body section 221 is 0.73, the ratio value of the diameter of the piston rod 24 to the length of the buffer inclined surface 223 is 0.67, and the ratio value of the length of the buffer inclined surface 223 to the diameter of the main body section 221 is 1.095. With the above ratio values, not only can the buffer stroke be increased, but also the movement of the piston member 20 can be made smoother and more fluent, reducing the sense of jerk.
[0042] The corresponding specification dimensions of the piston rod 24, the main body section 221 and the buffer inclined surface 223 can be set according to specific conditions. Optionally, the diameter of the piston rod 24 is 20 mm, the length of the buffer inclined surface 223 is 30 mm, the diameter of the main body section 221 is 27.4 mm, and the included angle between the buffer inclined surface 223 and the extension line of the main body section 221 extending towards the piston rod 24 is 7°. With the above corresponding specification dimensions of the piston rod 24, the main body section 221 and the buffer inclined surface 223, the working conditions of sand mold handling can be met, and the problem of cylinder buffer jerk can be more significantly improved.
[0043] Figure 5 is Figure 1 a schematic diagram of the buffer stroke curve of the shown buffer cylinder. With the buffer cylinder of the above specifications, the buffer stroke curve diagram as shown in Figure 5 can be obtained. In Figure 5 it can be clearly seen that the buffer stroke increases, the curve transition is smoother and more fluent, avoiding the sense of jerk caused by sudden changes in the buffer action, and well solving the problem of buffer jerk.
[0044] Figure 6 This is a schematic diagram of the buffer stroke curve of a cylinder provided in the prior art. Using the buffer cylinder in the prior art, the following can be achieved: Figure 4 The buffer stroke curve is shown in the image. Figure 4 During the process, when the piston enters the buffer stroke, the buffer stroke curve has obvious bends due to the short buffer stroke, resulting in a noticeable jerking sensation during buffering.
[0045] Optionally, an extended buffer ring 25 may be provided between the first buffer ring 22 and / or the second buffer ring 23 and the buffer body. The extended buffer ring 25 can effectively increase the length of the first buffer ring 22 and / or the second buffer ring 23, that is, by increasing the distance between the first buffer ring 22 and the buffer body, and the distance between the second buffer ring 23 and the buffer body, the buffer stroke can be increased. The extended buffer ring 25 may be provided on the first buffer ring 22 or the second buffer ring 23 alone, or on both the first buffer ring 22 and the second buffer ring 23.
[0046] Optionally, the diameter of the extended buffer ring 25 is less than or equal to the diameter of the first buffer ring 22. By controlling the size of the extended buffer ring 25, its integration with the first buffer ring or the second buffer ring can be improved.
[0047] In one embodiment of this application, the diameter of the extended buffer ring 25 is smaller than the diameter of the first buffer ring 22, which can effectively save materials and reduce the overall weight of the piston component 20, thereby improving the overall portability of the buffer cylinder.
[0048] In one embodiment of this application, the diameter of the extended buffer ring 25 is equal to the diameter of the first buffer ring 22, which facilitates processing, eliminates the need for additional steps, and reduces manufacturing difficulty.
[0049] The buffer cylinder is a structure that achieves rapid movement through gas pressure. To increase the contact area with the gas, optionally, multiple buffer grooves 211 are provided around the piston body 21 in the circumferential direction, and the multiple buffer grooves 211 are arranged sequentially at intervals along the axial direction of the piston body 21. Through the multiple buffer grooves 211, the contact area between the piston 20 and the air in the inner cavity is increased, thereby making the piston 20 more sensitive to changes in air pressure, and thus enabling it to make corresponding actions quickly according to changes in air pressure, improving the response speed of the buffer cylinder.
[0050] To further ensure the airtightness of the buffer cylinder, optionally, the axial widths of the multiple buffer grooves 211 may be the same, partially the same, or all different; at least one buffer groove 211 is provided with a buffer sealing ring. By setting the buffer sealing ring, the airtightness of the cavity 101 can be ensured, and the contact area between the piston 20 and the air can also be increased, thereby enabling the piston 20 to respond to changes in air pressure more quickly.
[0051] Optionally, the outer casing 10 includes a cylinder 11 and a front cover 12 and a rear cover 13 respectively disposed at opposite ends of the cylinder 11. The piston rod 24 extends out of the cavity 101 through the front cover 12 and is reciprocating between the front cover 12 and the rear cover 13. The interior of the cylinder 11 is the cavity 101. The front cover 12 and the rear cover 13 respectively cover the two ends of the cylinder 11, wherein the rear cover 13 is closed, and the front cover 12 has a through hole through which the piston rod 24 passes.
[0052] In one embodiment of this application, the front cover 12 and the rear cover 13 are respectively provided with air holes penetrating the sidewalls of the end covers, and air hole connectors 16 are respectively connected to the air holes. In use, compressed air enters the cavity 101 through the air hole on the rear cover 13, pushing the piston 20 to move linearly toward the front cover 12. Inside the cylinder 11, the gas between the piston body 21 and the front cover 12 is discharged from the air hole on the front cover 12, and the piston rod 24 extends out of the cavity 101. When compressed air enters the cavity 101 through the air hole on the front cover 12, it pushes the piston 20 to move linearly toward the rear cover 13. Inside the cylinder 11, the gas between the piston body 21 and the rear cover 13 is discharged from the air hole on the rear cover 13, and the piston rod 24 retracts into the cavity 101.
[0053] Depending on the specific requirements, the cylinder 11 can have different shapes and structures, such as a cylindrical structure. Optionally, the cylinder 11 can be rectangular, with mounting holes at at least four corners. These mounting holes penetrate the cylinder 11 along its axial direction. The front cover 12 and rear cover 13 each have mounting holes corresponding to the mounting holes. Fasteners 14 pass through these mounting holes and mounting holes to connect the front cover 12 and rear cover 13 to the cylinder 11. The rectangular structure facilitates placement and storage. Connecting the front cover 12 and rear cover 13 to the cylinder 11 via the mounting holes at the four corners with fasteners 14 ensures a more stable and compact connection between the front cover 12 and rear cover 13 and the cylinder 11, resulting in a more integrated overall structure for the outer casing 10. Fasteners 14 include, but are not limited to, tie rods 141 and tie rod nuts 142.
[0054] To enable the buffer cylinder to quickly connect with other external components, a quick-connect component 15 may optionally be provided on one end of the piston rod 24 that extends outside the cavity 101. The quick-connect component 15 facilitates rapid assembly of the buffer cylinder with other external components requiring rapid linear travel. The quick-connect component 15 may include, but is not limited to, a quick-connect nut.
[0055] As can be seen from the above description and practice, the buffer cylinder provided in this application has the following advantages compared with the prior art: the outer shell 10 and the piston 20 cooperate with each other to realize the basic function of the cylinder. By controlling the corresponding proportions between the piston rod 24, the main body section 221 and the buffer inclined surface 223, the buffer stroke and buffer time are effectively increased, thereby suppressing the sharp rise in terminal pressure. Through smooth exhaust, a slow action is obtained, improving the smoothness of buffering, reducing the sense of jerking, and improving the stability of buffering. At the same time, this solution has a simple structure, solves the problem of buffer jerking, reduces its input time, improves the sand mold forming rate and production efficiency, and improves the product yield.
[0056] Those skilled in the art should understand that the above description is merely a specific embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the scope of this application should be included within the protection scope of this application.
Claims
1. A buffer cylinder, characterized in that, Comprising: A housing, within which a through cavity is provided; A piston member, which is arranged within the cavity and can reciprocate within the cavity; The piston member includes: a piston main body and a piston rod. At opposite ends of the piston main body, a first buffer ring and a second buffer ring are respectively provided and are symmetrically distributed in a mirror image manner; the first buffer ring includes a main body section and a buffer section connected in sequence. The main body section is connected to the piston main body, and the buffer section is connected to one end of the piston rod. The other end of the piston rod extends outside the cavity; a buffer inclined surface is provided on the buffer section; The ratio of the diameter of the piston rod to the diameter of the main body section is A, and the range of A is 0.72 < A < 0.75; the ratio of the diameter of the piston rod to the length of the buffer inclined surface is B, and the range of B is 0.60 < B < 0.70; the ratio of the length of the buffer inclined surface to the diameter of the main body section is C, and the range of C is 1.09 < C.
2. The buffer cylinder according to claim 1, wherein: The value of A is 0.73; the value of B is 0.67; the value of C is 1.
095.
3. The buffer cylinder according to claim 1, characterized in that, The diameter of the piston rod is 20 mm; the length of the buffer inclined surface is 30 mm; the diameter of the main body section is 27.4 mm; the included angle between the buffer inclined surface and the extension line of the main body section extending towards the piston rod direction is 7°.
4. The buffer cylinder according to any one of claims 1 to 3, characterized in that, An extended buffer ring is further provided between the first buffer ring and / or the second buffer ring and the buffer main body.
5. The buffer cylinder according to claim 4, characterized in that, The diameter of the extended buffer ring is less than or equal to the diameter of the first buffer ring.
6. The buffer cylinder according to any one of claims 1 to 3, characterized in that, A plurality of buffer grooves are circumferentially provided on the piston main body, and the plurality of buffer grooves are sequentially and spaced apart along the axial direction of the piston main body.
7. The buffer cylinder according to claim 6, characterized in that, The axial widths of the plurality of buffer grooves may be the same, partially the same, or all different; at least one of the buffer grooves is provided with a buffer sealing ring.
8. The buffer cylinder according to any one of claims 1 to 3, characterized in that, The housing includes: a cylinder barrel, and a front end cover and a rear end cover respectively provided at opposite ends of the cylinder barrel. The piston rod passes through the front end cover and extends outside the cavity, and the piston rod can reciprocate between the front end cover and the rear end cover.
9. The buffer cylinder according to claim 8, characterized in that, The cylinder barrel is of a rectangular structure, and assembly holes are respectively provided at at least four corners of the rectangular structure. The assembly holes penetrate through the cylinder barrel along the axial direction of the cylinder barrel; mounting holes corresponding to the assembly holes are respectively provided on the front end cover and the rear end cover, and fasteners are passed through the assembly holes and the mounting holes to respectively connect the front end cover and the rear end cover to the cylinder barrel.
10. The buffer cylinder according to any one of claims 1 to 3, characterized in that, A quick-connect component is provided at one end of the piston rod extending outside the cavity.