Compact cylinder

Abstract

The utility model provides a compact air cylinder, and belongs to the technical field of air cylinders. The problem that an existing air cylinder is long is solved. The compact air cylinder comprises a front end cover, a piston rod, a rear end cover, a cylinder barrel, a piston head and a convex ring. According to the compact type air cylinder, one end of the cylinder barrel is clamped into the front end cover, the other end of the cylinder barrel is clamped into the rear end cover, and through the arrangement of the structure, the distance between the front end cover and the rear end cover can be effectively shortened, so that the compact type air cylinder can be suitable for an environment with a small space, and the air cylinder can be conveniently transported.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of air cylinder relates to a compact air cylinder. BACKGROUND

[0002] With the development of pneumatic transmission technology, clean room, semiconductor and many other industries have higher and higher requirements for end effector such as pneumatic execution unit such as air cylinder, air claw. Because the construction cost of clean room is very high, the larger the size of the end effector is, the larger the space occupied will be, which means higher cost, and the pneumatic end effector is often moved during work, which belongs to part of the load, so the miniaturization and light weight of the end effector are higher and higher when building the clean room. The conventional air cylinder is difficult to cope with the application environment with limited installation space due to the problems of long length and heavy product, thereby causing certain difficulty in the miniaturization and light weight development of the equipment. SUMMARY

[0003] The utility model aims at the above problems existing in prior art, and provides a compact air cylinder which can reduce length and weight.

[0004] The utility model discloses a compact air cylinder, which can realize the purpose of reducing length and weight.

[0005] The front end cover is movably provided with a piston rod inside;

[0006] The rear end cover is arranged on one side of the front end cover, a cylinder barrel is arranged between the front end cover and the rear end cover, one end of the cylinder barrel is clamped into the front end cover, the other end of the cylinder barrel is clamped into the rear end cover, one end of the piston rod is provided with a piston head, and the side surface of the front end cover facing the rear end cover is provided with a convex ring.

[0007] In the compact air cylinder, the side surface of the front end cover facing the rear end cover is provided with a front clamping groove for clamping one end of the cylinder barrel, and the side surface of the rear end cover facing the front end cover is provided with a rear clamping groove for clamping the other end of the cylinder barrel.

[0008] In the compact air cylinder, the piston head comprises a first piston part and a second piston part, the first piston part and the second piston part are integrally formed, the first piston part faces the front end cover, and the second piston part faces the rear end cover.

[0009] In the compact air cylinder, the side surface of the first piston part facing the front end cover is provided with a second groove for accommodating the convex ring, and the side surface of the first piston part is provided with a second sealing ring.

[0010] In the compact cylinder, the diameter of the first piston part is larger than the diameter of the second piston part, and the rear end cover is provided with a first groove on the side surface facing the front end cover for accommodating the second piston part.

[0011] In the compact cylinder, the piston rod passes through a convex ring, a guide bearing is installed in the convex ring, and the convex ring, the guide bearing, the piston rod and the front end cover are coaxially arranged.

[0012] In the compact cylinder, a low-friction layer is arranged on the inner surface of the guide bearing.

[0013] In the compact cylinder, a first sealing ring is installed in the front end cover and abuts against the guide bearing, and a sealing groove for installing the first sealing ring is arranged in the front end cover.

[0014] In the compact cylinder, a plurality of connecting columns are arranged on the side surface of the cylinder barrel.

[0015] In the compact cylinder, connecting screws for connecting the corresponding connecting columns are arranged on the front end cover and the rear end cover.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1、In the utility model, one end of the cylinder barrel is clamped into the front end cover, the other end of the cylinder barrel is clamped into the rear end cover, through the arrangement of the above structure, the distance between the front end cover and the rear end cover can be effectively shortened, so that the compact cylinder can be applied to a smaller space environment, and secondly, the cylinder can be conveniently transported.

[0018] 2、When the first piston part of the piston head abuts against the front end cover, the convex ring is embedded into the second groove of the first piston part, when the second piston part of the piston head abuts against the rear end cover, the second piston part is clamped into the first groove of the rear end cover, so that the movement range of the piston head can be effectively expanded without changing the thickness of the piston head, that is, the moving distance of the piston rod can be effectively improved, secondly, through the arrangement of the first groove and the second groove, the weight and the manufacturing cost of the cylinder can be reduced.

[0019] 3、The inner surface of the guide bearing is provided with a low-friction layer, wherein the manufacturing material of the low-friction layer is PTFE material, the low-friction layer can make the relative movement between the piston rod and the guide bearing more smooth, greatly reduce the friction between the two, reduce the energy loss of the whole system, and secondly, it can also help to protect the guide bearing from the influence of small particles or impurities. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1is a structural schematic view of a preferred embodiment of the utility model.

[0021] Figure 2 is a side view of the compact cylinder.

[0022] Figure 3 is Figure 2 is a sectional view at A-A.

[0023] Figure 4 is a structural schematic view of the front end cover.

[0024] Figure 5 is a structural schematic view of the rear end cover.

[0025] In the figure, the front end cover 100, the piston rod 200, the rear end cover 300, the cylinder barrel 400, the piston head 500, the convex ring 110, the front clamping groove 120, the rear clamping groove 310, the connecting column 410, the connecting screw 411, the first piston part 510, the second piston part 520, the second recess 511, the second sealing ring 512, the first recess 320, the guide bearing 130, the first sealing ring 140. DETAILED DESCRIPTION

[0026] The following is a specific embodiment of the utility model and is further described the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0027] As Figure 1 — Figure 5 Indicated, a compact cylinder of the utility model includes the front end cover 100, the piston rod 200, the rear end cover 300, the cylinder barrel 400, the piston head 500 and the convex ring 110.

[0028] The piston rod 200 is movably arranged in the front end cover 100, the rear end cover 300 is arranged on one side of the front end cover 100, the cylinder barrel 400 is arranged between the front end cover 100 and the rear end cover 300, one end of the cylinder barrel 400 is clamped into the front end cover 100, the other end of the cylinder barrel 400 is clamped into the rear end cover 300, by the arrangement of the above structure, the distance between the front end cover 100 and the rear end cover 300 can be effectively shortened, so that the compact cylinder can be applied to the environment with smaller space, and secondly, the cylinder can be conveniently transported.

[0029] The front end cover 100 is provided with a front clamping groove 120 on the side facing the rear end cover 300 for clamping one end of the cylinder 400, the rear end cover 300 is provided with a rear clamping groove 310 on the side facing the front end cover 100 for clamping the other end of the cylinder 400, the side of the cylinder 400 is provided with a plurality of connecting columns 410, the front end cover 100 and the rear end cover 300 are both provided with connecting screws 411 for connecting the corresponding connecting columns 410, when installing, one end of the cylinder 400 is clamped into the front clamping groove 120 of the front end cover 100, the other end of the cylinder 400 is clamped into the rear clamping groove 310 of the rear end cover 300, then the connecting screws 411 on the front end cover 100 are screwed with the corresponding connecting columns 410, and the connecting screws 411 on the rear end cover 300 are screwed with the corresponding connecting columns 410, thus one end of the cylinder 400 is clamped into the front end cover 100, and the other end of the cylinder 400 is clamped into the rear end cover 300.

[0030] Further, one end of the cylinder 400 is clamped into the front clamping groove 120 of the front end cover 100, which can effectively improve the sealing between the front end cover 100 and the cylinder 400, in addition, the other end of the cylinder 400 is clamped into the rear clamping groove 310 of the rear end cover 300, which can effectively improve the sealing between the rear end cover 300 and the cylinder 400.

[0031] The piston rod 200 is provided with a piston head 500 on one end, the front end cover 100 is provided with a convex ring 110 on the side facing the rear end cover 300, when the piston head 500 abuts against the front end cover 100, the convex ring 110 is embedded into the piston head 500, the piston head 500 comprises a first piston part 510 and a second piston part 520, the first piston part 510 and the second piston part 520 are integrally formed, the first piston part 510 faces the front end cover 100, and the second piston part 520 faces the rear end cover 300, the first piston part 510 is provided with a second groove 511 on the side facing the front end cover 100 for accommodating the convex ring 110, the side of the first piston part 510 is provided with a second sealing ring 512, the diameter of the first piston part 510 is greater than the diameter of the second piston part 520, the rear end cover 300 is provided with a first groove 320 on the side facing the front end cover 100 for accommodating the second piston part 520, when the first piston part 510 of the piston head 500 abuts against the front end cover 100, the convex ring 110 is embedded into the second groove 511 of the first piston part 510, when the second piston part 520 of the piston head 500 abuts against the rear end cover 300, the second piston part 520 is clamped into the first groove 320 of the rear end cover 300, thus without changing the thickness of the piston head 500, the movement range of the piston head 500 can be effectively expanded, that is, the moving distance of the piston rod 200 can be effectively improved, in addition, through the arrangement of the first groove 320 and the second groove 511, the weight of the cylinder can be reduced, and the manufacturing cost of the cylinder can be reduced.

[0032] The piston rod 200 moves through the convex ring 110, a guide bearing 130 is installed in the convex ring 110, the convex ring 110, the guide bearing 130, the piston rod 200 and the front end cover 100 are coaxially arranged, and through the arrangement of the guide bearing 130, the gap between the piston rod 200 and the convex ring 110 can be controlled, that is, the gap between the piston rod 200 and the front end cover 100 can be controlled, so that the piston rod 200 can move along the central axis of the guide bearing 130.

[0033] Further, a low-friction layer (not labeled in the figure) is arranged on the inner surface of the guide bearing 130, wherein the manufacturing material of the low-friction layer (not labeled in the figure) is PTFE material, that is, polytetrafluoroethylene (PTFE), PTFE is a high molecular polymer polymerized by tetrafluoroethylene monomer, and due to its unique chemical structure and physical properties, it is widely used in various application scenarios that require wear resistance, corrosion resistance and low friction coefficient. Specifically, PTFE material has excellent chemical corrosion resistance and can resist the corrosion of most acid-base substances and organic solvents, which means that even in a working environment where these chemicals exist, the guide bearing 130 can still maintain a long service life and stable performance. In addition, it also has excellent thermal stability and can exhibit excellent mechanical properties between a temperature range from extremely low -180℃ to high temperature 260℃, ensuring that the equipment can reliably operate under a wide range of environmental conditions; more worth mentioning is that the friction coefficient of PTFE is very low, almost close to the sliding friction between ice surfaces, this property makes the relative movement between the piston rod 200 and the guide bearing 130 more smooth, greatly reducing the friction between the two; lower friction not only means that the piston rod 200 requires less energy consumption when moving, thereby reducing the energy loss of the entire system, but also reduces the heat generated by friction, further prolonging the service life of the components and reducing the maintenance requirements; in addition to reducing friction and energy loss, the presence of the PTFE layer can also help protect the guide bearing 130 from tiny particles or impurities, as its surface is not easy to absorb dust and other contaminants, which helps to maintain the cleanliness of the system. Therefore, using PTFE as the coating material for the inner surface of the guide bearing 130 not only improves the working efficiency of the compact cylinder, but also enhances its long-term reliability and durability.

[0034] A first sealing ring 140 is installed in the front end cover 100, the first sealing ring 140 abuts against the guide bearing 130, a sealing groove 150 for installing the first sealing ring 140 is arranged in the front end cover 100, in the utility model, the first sealing ring 140 and the second sealing ring 512 are made of fluorine rubber or butyronitrile rubber, through the arrangement of the first sealing ring 140, not only can the guide bearing 130 be prevented from separating from the front end cover 100, secondly, the air tightness between the front end cover 100 and the piston rod 200 can be improved.

[0035] According to the specific description of the compact cylinder above, the compact cylinder of the utility model is suitable for application scenarios that need linear motion control in limited space, especially those with strict installation size restrictions, high sealing requirements and good transportation convenience. The following are specific application scenarios:

[0036] Industrial automation equipment: used for grabbing devices on small mechanical arms or automated production lines. These applications usually require compact design to adapt to space limitations inside machines.

[0037] Medical equipment: such as surgical robots, diagnostic instruments, etc. These devices often need to be operated in a narrow working environment and have very high requirements for the precision and reliability of components.

[0038] Automobile manufacturing and maintenance tools: such as fastener installation equipment used in vehicle assembly lines, or portable maintenance tools, which must be small enough to be portable and easy to use.

[0039] Office automation products: such as paper transport systems in printers and copiers. These devices need to occupy as little space as possible while ensuring high efficiency and stable performance.

[0040] Household appliances: including some small household appliances that require linear driving function, such as automatic door lock mechanisms or other smart home components, which need to balance aesthetics and functionality.

[0041] Aerospace field: due to the key factors of weight and volume, this compact cylinder can be applied to various actuators inside aircraft.

[0042] Precision instruments and meters: for some measurement devices that are sensitive to environmental conditions such as temperature changes, this cylinder with high temperature resistance is very suitable for use as an internal driving element.

[0043] In summary, this compact cylinder is particularly suitable for the above-mentioned scenarios that require space saving but do not affect performance due to its unique structural design.

[0044] It should be noted that all directional indications (such as upper, lower, left, right, front, rear, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, the descriptions such as "first", "second", "one" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0046] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

Claims

1. A compact cylinder characterized by, The utility model relates to a piston rod and cylinder head structure, comprising: A front end cover is provided with a piston rod in the inside; A rear end cover is provided on one side of the front end cover, a cylinder is provided between the front end cover and the rear end cover, one end of the cylinder is clamped into the front end cover, the other end of the cylinder is clamped into the rear end cover; One end of the piston rod is provided with a piston head, a convex ring is provided on the side of the front end cover facing the rear end cover, and the convex ring is embedded into the piston head when the piston head abuts against the front end cover.

2. A compact cylinder according to claim 1, characterized in that A front clamping groove is provided on the side of the front end cover facing the rear end cover for clamping one end of the cylinder, and a rear clamping groove is provided on the side of the rear end cover facing the front end cover for clamping the other end of the cylinder.

3. A compact cylinder according to claim 1, characterized in that The piston head comprises a first piston part and a second piston part, the first piston part and the second piston part are integrally formed, the first piston part faces the front end cover, and the second piston part faces the rear end cover.

4. A compact cylinder according to claim 3, characterized in that A second recess is provided on the side of the first piston part facing the front end cover for accommodating the convex ring, and a second sealing ring is installed on the side of the first piston part.

5. A compact cylinder according to claim 3, characterized in that The diameter of the first piston part is greater than the diameter of the second piston part, and a first recess is provided on the side of the rear end cover facing the front end cover for accommodating the second piston part.

6. A compact cylinder according to claim 4, characterized in that The piston rod passes through the convex ring, a guide bearing is installed in the convex ring, and the convex ring, the guide bearing, the piston rod and the front end cover are coaxially arranged.

7. A compact cylinder according to claim 6, characterized in that A low-friction layer is provided on the inner surface of the guide bearing.

8. A compact cylinder according to claim 6, characterized in that A first sealing ring is installed in the front end cover, the first sealing ring abuts against the guide bearing, and a sealing groove is provided in the front end cover for installing the first sealing ring.

9. A compact cylinder according to claim 1, characterized in that A plurality of connecting columns are provided on the side of the cylinder.

10. A compact cylinder according to claim 9, characterized in that Connecting screws are provided on the front end cover and the rear end cover for connecting the corresponding connecting columns.

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