Holding air cylinder

Abstract

The utility model discloses an enclasping cylinder relates to cylinder technical field, wherein the enclasping cylinder includes cylinder body and sealing structure, cylinder body includes main part and enclasping sleeve, the main part forms the cavity that has the mounting mouth, enclasping sleeve includes the reveal section and the embedding section that are distributed along its axial direction, reveal section is located outside the mounting mouth, and the embedding section is located outside the mounting mouth. The embedded section extends into the containing cavity through the mounting opening and is in clearance fit with the inner wall of the mounting opening; the sealing structure comprises an elastic sealing piece, the elastic sealing piece is arranged on the peripheral wall of the exposed section in a sleeving mode, the first end of the elastic sealing piece is fixedly arranged on the peripheral wall of the exposed section in a sleeving mode, the first end of the elastic sealing piece is connected with the main body in a sealed mode, and the elastic sealing piece seals and shields a gap between the inner peripheral wall of the installation opening and the embedded section. The utility model aims to effectively reduce the corrosion of external environment to internal parts and prolong the service life of the clasping cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinders, in particular to a clamping cylinder. Background Art

[0002] The clamping cylinder is a key pneumatic control component, and its main function is to achieve accurate clamping and release of the piston rod in automation equipment and mechanical devices. It plays an important role in various industrial applications, especially in those occasions with high requirements for force and motion control. The stability and reliability of the clamping cylinder are crucial to ensure production efficiency and quality.

[0003] The clamping cylinder design currently on the market generally adopts an internal chuck structure, and realizes the clamping and unlocking functions by controlling the piston movement inside the sleeve through pneumatic signals. Specifically, when the air is ventilated, the gas enters the clamping sleeve through the air port, and the piston inside it moves downward under the pressure, overcoming the spring force, so that the two chucks are tightly closed, and the round hole in the middle of the chuck remains parallel to the piston rod, thereby allowing the piston rod to move freely; and when the air is cut off, the spring resets, the two chucks are stretched open by the spring force, and the round hole in the middle of the chuck forms an angle with the piston rod, so that the piston rod is clamped.

[0004] In the above-mentioned prior art solution, the sleeve needs to be plugged in and extended into the interior of the cylinder body. However, since there is an assembly gap between the sleeve and the cylinder body during assembly, dust, water or other impurities can easily enter the cylinder body and the sleeve through the gap, causing rust, interference, wear and other problems on the internal parts, which will not only reduce the service life of the cylinder, but also cause the cylinder to fail, affecting the stability and reliability of the entire system. Utility Model Content

[0005] The main purpose of the utility model is to provide a clamping cylinder, aiming to effectively reduce the corrosion of the external environment to the internal parts and increase the service life of the clamping cylinder.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a clamping cylinder, comprising:

[0007] A cylinder body, the cylinder body comprising a main body and a clamping sleeve, the main body forming a cavity with a mounting opening, the clamping sleeve comprising an exposed section and an embedded section distributed along its axial direction, the exposed section being located outside the mounting opening, the embedded section extending into the cavity through the mounting opening, and the embedded section being in clearance fit with an inner wall of the mounting opening; and

[0008] A sealing structure, wherein the sealing structure comprises an elastic seal, wherein the first end of the elastic seal is fixedly sleeved on the outer peripheral wall of the exposed section, the second end of the elastic seal is sealingly connected to the main body, and the elastic seal seals and shields the gap between the inner peripheral wall of the installation opening and the embedded section.

[0009] In one embodiment, a first sealing lip protrudes from the first end of the elastic seal, and the first sealing lip faces the clamping sleeve.

[0010] A first sealing groove is formed on the outer peripheral wall of the clamping sleeve, and a part of the structure of the first sealing lip is accommodated in the first sealing groove.

[0011] The sealing structure further includes a first fixing member, at least a part of the structure of the first fixing member abuts against the outer wall of the first sealing lip, and the first fixing member is used to press the first sealing lip against the outer peripheral wall of the exposed section.

[0012] In one embodiment, the first fixing member includes a sealing sleeve, the sealing sleeve is sleeved on the end of the clamping sleeve away from the main body, the sealing sleeve is sequentially formed with a straight-through section and a flared section along the axial direction of the clamping sleeve, the straight-through section is detachably sleeved on the outside of the clamping sleeve, the flared section abuts against the outer wall of the first sealing lip, and the flared section is used to fix the first sealing lip.

[0013] In one embodiment, an external thread is provided on the inner side wall of the straight-through section, and an internal thread is provided on the outer peripheral wall of the clamping sleeve, and the straight-through section and the clamping sleeve are connected by the external thread and the internal thread.

[0014] In one embodiment, a second sealing lip protrudes from the second end of the elastic seal, and the second sealing lip faces the main body.

[0015] The sealing structure further includes a second fixing member, at least a part of the structure of the second fixing member abuts against the outer wall of the second sealing lip to press the second sealing lip against the outer wall of the main body.

[0016] In one embodiment, the second fixing member includes a sealing cover, the sealing cover surrounds the clamping sleeve, and at least a part of the sealing cover abuts against the outside of the elastic seal to press a part of the structure of the second sealing lip against the outer wall of the main body.

[0017] In one embodiment, the second fixing member further includes a fastening screw, and the fastening screw is used to lock the sealing cover and the main body to fix the second sealing lip.

[0018] In one embodiment, one end of the second sealing lip close to the main body is in sealing contact with the outer wall of the main body, and from the end of the second sealing lip close to the main body to the end of the second sealing lip away from the main body, the distance between the side of the second sealing lip facing away from the exposed section and the exposed section gradually decreases.

[0019] In one embodiment, a diversion opening is formed on the outer side surface of the main body, and a diversion channel is provided to connect the cavity and the diversion opening;

[0020] The diversion opening and the installation opening are located on the same side of the main body.

[0021] In one embodiment, an elastic telescopic section is provided between the first end and the second end of the elastic seal, and the elastic telescopic section includes a corrugated structure.

[0022] By providing an elastic seal on the outer peripheral wall of the exposed section of the clamping sleeve, the clamping cylinder provided by the present utility model can effectively seal the assembly gap between the inner peripheral wall of the installation opening and the embedded section of the clamping sleeve, so that on the premise of meeting the clamping performance, the clamping cylinder can effectively prevent dust, moisture and other impurities from entering the cylinder body and the inside of the sleeve through the gap of the installation opening, thereby reducing the problems of corrosion, interference and wear of internal parts, and further maintaining good dust and waterproof performance in a harsh industrial environment, improving the adaptability and reliability of the clamping cylinder in various environments. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0024] Figure 1 Structural schematic diagram of an embodiment of the clamping cylinder provided by the present utility model (the elastic seal is in a stretched state);

[0025] Figure 2 Structural schematic diagram of an embodiment of the clamping cylinder provided by the present utility model (the elastic seal is in a contracted state);

[0026] Figure 3 Structural schematic diagram of an embodiment of the elastic seal provided by the present utility model;

[0027] Figure 4 Structural schematic diagram of another embodiment of the elastic seal provided by the present utility model;

[0028] Figure 5 Structural schematic diagram of an embodiment of the sealing sleeve provided by the present utility model;

[0029] Figure 6 Structural schematic diagram of another embodiment of the sealing sleeve provided by the present utility model;

[0030] Figure 7Schematic diagram of a structure of an embodiment of the clamping sleeve provided by the present utility model;

[0031] Figure 8 Schematic diagram of a structure of another embodiment of the clamping cylinder provided by the present utility model.

[0032] Explanation of the reference numerals in the drawings:

[0033] 1000, clamping cylinder; 1, cylinder block; 11, main body; 111, cavity; 112, mounting port; 113, diversion port; 114, second sealing groove; 12, clamping sleeve; 121, first sealing groove; 122, air port; 2, sealing structure; 21, elastic seal; 211, first sealing lip; 212, second sealing lip; 213, corrugated structure; 22, first fixing member; 22a, sealing sleeve; 221, straight section; 222, flared section; 23, second fixing member; 23a, sealing cover; 231, third sealing groove; 24, fastening screw; 3, cylinder head; 4, piston rod; 5, first sealing ring; 6, second sealing ring; 7, chuck; 8, spring; 9, unlocking piston.

[0034] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0036] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, such descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0038] The present utility model provides a clamping cylinder 1000.

[0039] Please refer to Figures 1 to 8 , in an embodiment of the present utility model, to achieve the above object, a clamping cylinder 1000 provided by the present utility model may include a cylinder block 1 and a sealing structure 2. The cylinder block 1 includes a main body 11 and a clamping sleeve 12. The main body 11 forms a cavity 111 having an installation opening 112. The clamping sleeve 12 includes an exposed section and an embedded section distributed along its axial direction. The exposed section is located outside the installation opening 112, and the embedded section extends into the cavity 111 through the installation opening 112. The embedded section is in clearance fit with the inner wall of the installation opening 112; the sealing structure 2 includes an elastic seal 21. The elastic seal 21 is sleeved on the outer peripheral wall of the exposed section. The first end of the elastic seal 21 away from the main body 11 is fixedly sleeved on the outer peripheral wall of the exposed section, and the second end of the elastic seal 21 is sealingly connected to the main body 11. The elastic seal 21 sealingly shields the gap between the inner peripheral wall of the installation opening 112 and the embedded section.

[0040] By providing the elastic seal 21 on the outer peripheral wall of the exposed section of the clamping sleeve 12, the clamping cylinder 1000 provided by the present utility model can effectively seal and shield the assembly gap between the inner peripheral wall of the installation opening 112 and the embedded section of the clamping sleeve 12, so that under the premise of meeting the clamping performance, the clamping cylinder 1000 can effectively prevent dust, moisture and other impurities from entering the cylinder body and the inside of the sleeve through the gap of the installation opening 112, thereby reducing the problems of corrosion, interference and wear of internal parts, and further maintaining good dust and water protection performance in a harsh industrial environment, improving the adaptability and reliability of the clamping cylinder 1000 in various environments.

[0041] In this embodiment, the elastic seal 21 can be a sealing ring or a sealing sleeve 22a made of elastic material, and its cross-sectional shape is usually a rectangular structure or a circular structure. However, in order to achieve the best sealing effect, the cross-sectional shape of the elastic seal 21 can also be a structure that matches the shape of the outer peripheral surface of the clamping sleeve 12. For example, when the outer peripheral surface of the clamping sleeve 12 is a rectangle or other non-circular contour, the elastic seal 21 with a rectangular cross-section can provide a more uniform pressure distribution, thereby forming an effective seal on the contact surface. The rectangular seal can provide sealing on two main planes, which is suitable for plane sealing or groove sealing; while for the outer peripheral surface of the clamping sleeve 12 that is circular or other approximately circular, the elastic seal 21 with a circular cross-section (such as a traditional O-ring) can form a continuous sealing line on the contact surface when compressed, which is suitable for most standard sealing requirements.

[0042] Of course, in other embodiments, the cross-sectional shape of the elastic seal 21 may also be an irregular graphic structure, which is specifically designed according to actual conditions and is not limited in the embodiments of this specification. In addition, there may be a variety of ways to seal the elastic seal 21 with the clamping sleeve 12 and the main body 11, such as by a fixing member or by providing a clamping groove on the clamping sleeve 12 and the main body 11 that can limit and clamp the partial structure of the elastic seal 21 to achieve a sealed connection.

[0043] In this embodiment, the clamping cylinder 1000 controls the clamping or unlocking of the piston rod 4 by opening and closing the first clamp 7 and the second clamp 7 inside the clamping sleeve 12. The principle is as follows: when ventilated, the piston rod 4 is unlocked, and the gas passes through the air port 122 above the clamping sleeve 12, so that the unlocking piston 9 overcomes the force of the two springs 8 and presses down, tightening the first clamp 7 and the second clamp 7, so that the circular hole between the first clamp 7 and the second clamp 7 is parallel to the piston rod 4, thereby unlocking the piston rod 4 and allowing normal reciprocating motion; when the gas is cut off, the piston rod 4 is locked, the two springs 8 are reset, and the unlocking piston 9 moves upward due to the force of the spring 8, the first clamp 7 and the second clamp 7 are stretched open by the force of the spring 8, and the circular hole between the first clamp 7 and the second clamp 7 forms an angle with the piston rod 4, thereby clamping the piston rod 4.

[0044] See also Figure 3 and Figure 4, in an embodiment of the present application, a first sealing lip 211 protrudes from the first end of the elastic seal 21. The first sealing lip 211 faces the clamping sleeve 12. The first sealing lip 211 can be formed by one or more segments of the side wall of the elastic seal 21 protruding outward, or can be formed by the edge portion of the elastic sealing lip protruding outward; a first sealing groove 121 is formed on the outer peripheral wall of the clamping sleeve 12. A part of the structure of the first sealing lip 211 is received in the first sealing groove 121. When the elastic seal 21 contacts the clamping sleeve 12, the first sealing lip 211 will closely fit against the groove wall of the first sealing groove 121. The first sealing groove 121 can limit the first sealing lip 211 to prevent it from shifting due to vibration or impact during the operation of the clamping cylinder 1000. And a part of the structure of the first sealing lip 211 is received in the annular sealing groove, so that the elastic seal 21 can form a continuous sealing line with the clamping sleeve 12, further enhancing the sealing effect; further, the sealing structure 2 further includes a first fixing member 22. At least a part of the structure of the first fixing member 22 abuts against the outer wall of the first sealing lip 211. The first fixing member 22 is used to press the first sealing lip 211 against the outer peripheral wall of the exposed section, which can ensure that the first sealing lip 211 closely fits against the outer peripheral wall of the exposed section, thereby enhancing the sealing effect. In addition, the first fixing member 22 also helps to maintain the stability of the elastic seal 21 during installation and operation, preventing the elastic seal 21 from shifting due to vibration or external force.

[0045] In this embodiment, the sealing lip can also be an O-ring structure or a labyrinth structure. The O-ring structure is a sealing structure with a circular cross-section. During installation, a seal is formed between the O-ring structure and the contact surface of the clamping sleeve; the labyrinth structure is generally composed of a series of closely arranged protrusions. Fluids or gases will flow in the gaps formed between these protrusions. However, due to the tortuous and narrow gaps, fluids or gases can be effectively sealed within the labyrinth structure.

[0046] In specific implementation, the first fixing member 22 can be in various forms such as a clamp, a retaining ring or a fastener, etc., and is specifically designed according to the actual situation, and is not limited in the embodiments of the specification.

[0047] Please refer to Figure 5 and Figure 6, in an embodiment of the present application, the first fixing member 22 is a sealing sleeve 22a. The sealing sleeve 22a is sleeved on one end of the clamping sleeve 12 away from the main body 11. The sealing sleeve 22a is successively formed with a straight-through section 221 and a flared section 222 along the axial direction of the clamping sleeve 12. The straight-through section 221 is detachably sleeved on the outer side of the clamping sleeve 12, and the flared section 222 abuts against the outer wall of the first sealing lip 211. The flared section 222 is used to fix the first sealing lip 211. Among them, the cross-sectional area of the straight-through section 221 is smaller than that of the flared section 222. The straight-through section 221 is mainly to keep close contact with the outer peripheral surface of the clamping sleeve 12, providing a stable installation basis for the sealing sleeve 22a. The function of the flared section 222 is to apply pressure to the first sealing lip 211 to ensure that it closely fits on the outer peripheral wall of the exposed section of the clamping sleeve 12.

[0048] During actual installation, the elastic sealing member 21 needs to be sleeved on the clamping sleeve 12 first, and then the sealing sleeve 22a (the first fixing member 22) is installed on the clamping sleeve 12. By gently pushing the sealing sleeve 22a along the axial direction of the clamping sleeve 12 until its flared section 222 contacts and applies pressure to the first sealing lip 211 of the elastic sealing member 21.

[0049] In this embodiment, the straight-through section 221 can be detachably fixed to the clamping sleeve 12 through a connection structure or an external screw. For example, the straight-through section 221 is provided with holes or grooves for fixing screws. The screws pass through these holes or grooves and cooperate with the threaded holes on the clamping sleeve 12 to achieve fixation. In this way, the sealing structure 2 of the clamping cylinder 1000 can not only achieve fast and simple installation and maintenance, but also ensure stability and reliability in a complex industrial environment.

[0050] In an embodiment of the present application, an external thread is provided on the inner side wall of the straight-through section 221, and an internal thread is provided on the outer peripheral wall of the clamping sleeve 12. The straight-through section 221 and the clamping sleeve 12 are connected by the external thread and the internal thread. The threaded connection can not only provide a high connection strength to ensure that the sealing sleeve 22a will not loosen during operation, but also make the installation and disassembly of the sealing sleeve 22a simple and fast, improving the maintenance efficiency.

[0051] Please refer to Figure 3 and Figure 4, in an embodiment of the present application, a second sealing lip 212 protrudes from one end of the elastic seal 21 close to the main body 11, and the second sealing lip 212 faces the main body 11; the second sealing lip 212 can be formed by one or more sections of the side wall of the elastic seal 21 protruding outward, or can be formed by the edge portion of the elastic sealing lip protruding outward. In this way, the extending direction of the second sealing lip 212 can be parallel to the plane where the outer wall of the main body 11 is located or set at an inclination angle. When the elastic seal 21 contacts the clamping sleeve 12, the second sealing lip 212 will closely fit the outer wall of the main body 11. Further, the sealing structure 2 further includes a second fixing member 23, and at least a part of the second fixing member 23 abuts against the outer wall of the second sealing lip 212 to press the second sealing lip 212 against the outer wall of the main body 11, which can ensure that the second sealing lip 212 closely adheres to the outer wall of the main body 11, thereby enhancing the sealing effect. In addition, the second fixing member 23 also helps to maintain the stability of the elastic seal 21 during installation and operation, preventing the elastic seal 21 from shifting due to vibration or external force. In specific implementation, the second fixing member 23 can be in various forms such as a clamp, a retaining ring or a fastener, etc., and is specifically designed according to the actual situation, and is not limited in the present application.

[0052] In an embodiment of the present application, the second fixing member 23 includes a sealing cover 23a. The sealing cover 23a surrounds the clamping sleeve 12, and at least a part of the sealing cover 23a abuts against the outside of the elastic seal 21 to press a part of the second sealing lip 212 against the outer wall of the main body 11. By abutting against a part of the second sealing lip 212, the sealing cover 23a applies pressure to ensure that the second sealing lip 212 closely adheres to the outer wall of the main body 11, thereby enhancing the sealing effect. During actual installation, the elastic seal 21 needs to be sleeved on the clamping sleeve 12 first, and then the sealing cover 23a (the second fixing member 23) is sleeved on the outside of the clamping sleeve 12. By gently pressing the sealing cover 23a along the axial direction of the clamping sleeve 12 until the sealing cover 23a contacts the second sealing lip 212 and applies pressure.

[0053] In this embodiment, the sealing cover 23a can be detachably fixed to the main body 11 through a threaded structure or an externally added screw. For example, a guiding boss is provided on the main body 11, an external thread is provided on the outer side wall of the boss, and an internal thread is provided on the inner side wall of the sealing cover 23a. The sealing cover 23a and the boss are screwed together through the external thread and the internal thread, and then the second sealing lip 212 provided between the sealing cover 23a and the boss is pressed on the boss. In this way, the sealing structure 2 of the clamping cylinder 1000 can not only achieve rapid and simple installation and maintenance, but also ensure stability and reliability in a complex industrial environment.

[0054] In an embodiment of the present application, the second fixing member 23 further includes a fastening screw 24, and the fastening screw 24 is used to lock the sealing cover 23a and the main body 11 to fix the second sealing lip 212. It should be added that the sealing cover 23a is provided with holes or grooves for fixing the fastening screw 24, and the fastening screw 24 passes through these holes or grooves and cooperates with the threaded holes on the main body 11 to achieve fixation.

[0055] In an embodiment of the present application, a second sealing groove 114 for accommodating a part of the structure of the second sealing lip 212 is formed on the outer wall of the main body 11; the second sealing groove 114 can limit the second sealing lip 212 to prevent it from shifting due to vibration or impact during the operation of the clamping cylinder 1000, and a part of the structure of the second sealing lip 212 is accommodated in the second sealing groove 114 so that the elastic sealing member 21 can form a continuous sealing line with the main body 11, further enhancing the sealing effect; in another embodiment of the present application, a third sealing groove 231 for accommodating a part of the structure of the second sealing lip 212 is formed on the side of the sealing cover 23a close to the main body 11, and the third sealing groove 231 can limit the second sealing lip 212 to prevent it from shifting due to vibration or impact during the operation of the clamping cylinder 1000, and a part of the structure of the third sealing lip is accommodated in the third sealing groove 231 so that the elastic sealing member 21 can form a continuous sealing line with the sealing cover 23a, further enhancing the sealing effect.

[0056] In still another embodiment of the present application, the second limiting groove and the third limiting groove can be formed simultaneously to jointly limit the second sealing lip 212.

[0057] In an embodiment, when the clamping cylinder 1000 is working, the clamping sleeve 12 will experience axial displacement due to vibration, causing the elastic sealing member 21 to be in a stretched state ( Figure 1 ), or a contracted state ( Figure 2 ). In order to avoid fatigue failure of the elastic sealing member 21 under long-term stretching or contraction, in an embodiment of the present application, the end of the second sealing lip 212 close to the main body 11 is in sealing contact with the outer wall of the main body 11. From the end of the second sealing lip 212 close to the main body 11 to the end of the second sealing lip 212 away from the main body 11, the interval between the side of the second sealing lip 212 facing away from the exposed section and the exposed section gradually decreases, that is, the second sealing lip 212 is inclined relative to other structures of the elastic sealing member 21. This design can provide an effective avoidance space for the elastic deformation of the elastic sealing member 21, thereby improving the reliability and service life of the elastic sealing member 21.

[0058] In an embodiment of the present application, an elastic telescopic section is provided between the first end and the second end of the elastic seal 21. The elastic telescopic section includes a corrugated structure 213. The corrugated structure 213 can increase the elasticity of the elastic seal 21, enabling it to more effectively return to its original shape when compressed and reducing stress concentration caused by deformation. In addition to the corrugated structure, the elastic telescopic section can also be a pleated structure. The pleated structure is similar to the corrugated structure and mainly enables the elastic seal 21 to withstand pressure and tension within a certain range and have sufficient elasticity by folding or stacking multiple layers of materials.

[0059] In a traditional clamping cylinder 1000, a cylinder front cover 3 for fixing the piston rod 4 is usually provided in the cavity 111 inside the body. Therefore, in an embodiment of the present application, a first sealing ring 5 and a second sealing ring 6 are installed between the main body 11, the cylinder front cover 3, and the piston rod 4, so as to eliminate the gaps between the body and the cylinder front cover 3 and the piston rod 4.

[0060] Considering that the elastic seal 21, the first sealing ring 5, and the second sealing ring 6 completely seal the gap between the main body 11 and the clamping sleeve 12, when the air port 122 is ventilated, it is easy for gas to fill the closed cavity 111 and cannot be discharged, resulting in a backpressure phenomenon and causing the elastic seal 21 to fail due to gas impact. To solve the above problems, please refer to Figure 1 and Figure 8 , in an embodiment of the present application, a diversion port 113 is provided on the outer side surface of the main body 11, and a diversion channel is provided to connect the cavity 111 and the diversion port 113. The setting of the diversion port 113 can prevent the occurrence of the backpressure phenomenon, enable the excess gas to be discharged from the diversion port 113, and reduce the influence of the up and down floating of the clamping sleeve 12 on the clamping performance, thereby improving the service life of the clamping cylinder 1000.

[0061] For the convenience of maintenance, in an embodiment of the present application, the diversion port 113 and the installation port 112 are located on the same side of the main body 11, enabling maintenance personnel to simultaneously check the sealing conditions of the diversion port 113 and the installation port 112 during maintenance and simplifying the maintenance process.

[0062] The above description is only an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A clamping cylinder, characterized in that: The holding cylinder comprises: A cylinder body, the cylinder body comprising a main body and a clamping sleeve, the main body forming a cavity with a mounting opening, the clamping sleeve comprising an exposed section and an embedded section distributed along its axial direction, the exposed section being located outside the mounting opening, the embedded section extending into the cavity through the mounting opening, and the embedded section being in clearance fit with an inner wall of the mounting opening; and A sealing structure, wherein the sealing structure comprises an elastic seal, wherein the first end of the elastic seal is fixedly sleeved on the outer peripheral wall of the exposed section, the second end of the elastic seal is sealingly connected to the main body, and the elastic seal seals and shields the gap between the inner peripheral wall of the installation opening and the embedded section.

2. The clamping cylinder according to claim 1, characterized in that: A first sealing lip is protruding from the first end of the elastic sealing member, and the first sealing lip is arranged toward the clamping sleeve; A first sealing groove is formed on the outer peripheral wall of the clamping sleeve, and a part of the structure of the first sealing lip is accommodated in the first sealing groove; The sealing structure further includes a first fixing member, at least a portion of which abuts against an outer wall of the first sealing lip, and the first fixing member is used to press the first sealing lip against the outer peripheral wall of the exposed section.

3. The clamping cylinder according to claim 2, characterized in that: The first fixing member includes a sealing sleeve, which is sleeved on an end of the clamping sleeve away from the main body. The sealing sleeve is sequentially formed with a straight-through section and a flared section along the axial direction of the clamping sleeve. The straight-through section is detachably sleeved on the outer side of the clamping sleeve, and the flared section abuts against the outer wall of the first sealing lip, and the flared section is used to fix the first sealing lip.

4. The clamping cylinder according to claim 3, characterized in that: The inner side wall of the straight-through section is provided with an external thread, the outer peripheral wall of the clamping sleeve is provided with an internal thread, and the straight-through section and the clamping sleeve are connected via the external thread and the internal thread.

5. The clamping cylinder according to claim 1, characterized in that: A second sealing lip is convexly disposed at the second end of the elastic sealing member, and the second sealing lip is disposed toward the main body; The sealing structure further includes a second fixing member, at least a portion of which abuts against an outer wall of the second sealing lip to press the second sealing lip against the outer wall of the main body.

6. The clamping cylinder according to claim 5, characterized in that: The second fixing member comprises a sealing cover, which is arranged around the clamping sleeve and at least partially abuts against the outer side of the elastic sealing member to press a part of the structure of the second sealing lip against the outer wall of the main body.

7. The clamping cylinder according to claim 6, characterized in that: The second fixing member further includes a fastening screw, and the fastening screw is used to lock the sealing cover and the main body to fix the second sealing lip.

8. The clamping cylinder according to claim 5, characterized in that: One end of the second sealing lip close to the main body is sealed against the outer wall of the main body, and the distance between the second sealing lip and the exposed section gradually decreases from the end of the second sealing lip close to the main body to the end of the second sealing lip away from the main body.

9. The clamping cylinder according to any one of claims 1 to 8, characterized in that: The outer side surface of the main body is provided with a flow guide port, and a flow guide channel is provided to connect the cavity and the flow guide port; The guide port and the installation port are located on the same side of the main body.

10. The clamping cylinder according to any one of claims 1 to 8, characterized in that: An elastic expansion section is provided between the first end and the second end of the elastic sealing member, and the elastic expansion section comprises a corrugated structure.

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