Novel cylinder body and inflatable holding unit

Abstract

The invention discloses a novel cylinder body and an inflatable holding unit, and belongs to the technical field of pneumatic elements. The novel cylinder body comprises a cylinder base, an outer cylinder body fixedly arranged on the cylinder base, an inner cylinder body coaxially arranged in the outer cylinder body and used for reciprocating motion of a piston rod, and a silencing cavity arranged between the inner cylinder body and the outer cylinder body and used for silencing. The end, corresponding to the outer cylinder body, of the cylinder base is provided with an air port communicated with the interior of the inner cylinder body and used for air inlet and air outlet. A heat conduction supporting piece used for fixing the inner cylinder body and the outer cylinder body and conducting heat is arranged in the silencing cavity. According to the novel cylinder body and the inflation holding unit, noise is reduced through the noise reduction cavity, structural fixation and passive heat dissipation can be achieved through the heat conduction supporting piece, the angle of the air tap is flexibly adjusted through the universal structure combination so as to optimize pipeline layout, the installation difficulty is reduced, and it is guaranteed that an air channel is smooth; and meanwhile, the sealing state is kept through the telescopic sealing structure which synchronously stretches and retracts along with angle adjustment, and abrasion caused by dust and impurity invasion is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of pneumatic elements, and particularly relates to a novel cylinder body and an air charging holding unit. BACKGROUND

[0002] In the fields of industrial automation, mechanical execution systems and pneumatic tools, a cylinder as a core power transmission element directly affects the overall performance of equipment in terms of running stability, noise control, installation adaptability and service life.

[0003] A novel cylinder body is disclosed in a Chinese utility model patent with the patent number CN222351057U. The cylinder body can be quickly disassembled, precisely installed and stably operated by setting a cylinder replacement groove, a first magnet, a limiting sliding groove, a sliding block, a locking rod, a second magnet, a limiting strip of the replacement cylinder, a locking hole and a handle. However, the cylinder is usually a single cavity. When the piston rod reciprocates in the cylinder, mechanical vibration noise generated by the friction between the piston and the cylinder wall and turbulent impact noise formed when the gas enters and exits through the air port will be directly radiated and propagated outward, especially in the load running state, the noise is relatively high, which easily interferes with the working environment. In addition, the air nozzle matched with the traditional cylinder is usually designed at a fixed angle. In a complex equipment layout, the air pipe needs to be forcibly bent to adapt to the angle of the air nozzle, which affects the smoothness of the air path and increases the pressure loss, or additional adapter accessories need to be added to adjust the direction of the air path, which not only makes the pipeline layout messy, but also greatly increases the installation difficulty and time cost.

[0004] Therefore, the application provides a novel cylinder body and an air charging holding unit to solve the above problems. SUMMARY

[0005] The application provides a novel cylinder body and an air charging holding unit, which aims to solve the problems that the existing novel cylinder body can realize quick disassembly of the replacement cylinder body, but the single cavity of the cylinder body leads to high running noise and easily interferes with the environment, and the traditional cylinder body usually adopts a fixed angle air nozzle, which has poor adaptability in a complex equipment layout and high installation difficulty and time cost.

[0006] To achieve the above purpose, the application provides the following technical scheme: a novel cylinder body comprises a cylinder base, an outer cylinder body fixedly arranged on the cylinder base, an inner cylinder body coaxially arranged in the outer cylinder body and used for reciprocating movement of a piston rod, and a sound attenuation cavity arranged between the inner cylinder body and the outer cylinder body and used for sound attenuation, one end of the cylinder base corresponding to the outer cylinder body is provided with an air port in communication with the inside of the inner cylinder body and used for air intake and exhaust. The heat conduction support is arranged in the sound attenuation cavity and is used for fixing and conducting heat of the inner cylinder and the outer cylinder; the sound attenuation cavity between the inner cylinder and the outer cylinder forms a closed acoustic buffer space, can reflect and attenuate mechanical vibration noise and gas turbulent impact noise generated by the piston rod movement for multiple times, reduces noise, and simultaneously connects the inner cylinder and the outer cylinder through the heat conduction support, not only makes the inner cylinder and the outer cylinder form rigid fixation, ensures that relative positions of the two are stable, reduces cylinder wall abrasion caused by shaking, but also conducts heat generated by the inner cylinder due to piston friction and gas compression to the outer cylinder, so that passive heat dissipation is realized.

[0007] Preferably, in order to realize structural support and heat conduction, the heat conduction support comprises an aluminum alloy support arranged in the sound attenuation cavity, and two ends of the aluminum alloy support are fixedly connected with the outer wall of the inner cylinder and the inner wall of the outer cylinder respectively; the aluminum alloy support is connected with the outer wall of the inner cylinder and the inner wall of the outer cylinder at two ends, and due to the high heat conduction coefficient of the aluminum alloy material, heat generated by the inner cylinder can be quickly transmitted to the outer cylinder, and meanwhile, the aluminum alloy support has sufficient structural strength to realize stable connection of the inner cylinder and the outer cylinder.

[0008] Preferably, in order to balance stress of the inner cylinder and ensure heat conduction, the aluminum alloy support is provided in plurality, and the plurality of aluminum alloy supports are uniformly distributed along the circumference of the inner cylinder; the design that the plurality of aluminum alloy supports are uniformly distributed along the circumference of the inner cylinder can offset radial force generated by the piston rod movement from multiple angles, avoids deviation of the inner cylinder due to unilateral stress, and simultaneously allows heat of each region of the inner cylinder to be synchronously conducted to the outer cylinder through the corresponding support, thereby reducing heat accumulation.

[0009] On the other hand, the application further provides an air charging holding unit of the novel cylinder, which comprises a gas nozzle arranged at a position corresponding to a gas port on the cylinder seat and a universal structure arranged between the gas nozzle and the gas port and used for adjusting an angle of the gas nozzle. The universal structure comprises a fixed pipe fixedly arranged at a position corresponding to the gas port on the cylinder seat and in communication with the gas port, a universal ball rotationally connected to one end of the fixed pipe away from the gas port, a channel arranged in the universal ball and used for gas flow, a hose arranged in the fixed pipe and used for flexible connection of the universal ball and the gas port, and a locking assembly arranged on the fixed pipe and used for locking a position of the universal ball after the universal ball is adjusted to a target angle; one half of the universal ball is rotationally arranged in the fixed pipe, and the other half is fixedly connected with the gas nozzle; two ends of the hose are fixedly connected with the universal ball away from the gas nozzle and the gas port away from the inner cylinder respectively. The fixed pipe is provided with a telescopic sealing structure for sealing the rotating connection between the fixed pipe and the universal ball and the fixed connection between the universal ball and the air nozzle; through the combined design of the universal ball, the fixed pipe, the locking assembly and the hose, the angle of the air nozzle can be flexibly adjusted, so that the air nozzle can be easily rotated to an angle most suitable for connecting the air pipe, the optimal pipeline layout is realized, the installation difficulty is reduced, the air path is always smooth, and the service life of the universal structure is ensured.

[0010] Preferably, in order to realize the connection of the air nozzle and the external pipeline, an outer thread is arranged at the end of the air nozzle away from the universal ball, which is used for screwing and connecting with the inner thread of the external pipeline; the outer thread of the air nozzle can be screwed and matched with the inner thread of the external pipeline to form a closely fitted surface, which simplifies the butt joint operation of the air nozzle and the external pipeline and facilitates installation.

[0011] Preferably, in order to ensure that the universal ball can be stably fixed after being adjusted to the target angle, the locking assembly is provided with at least two; the design of at least two locking assemblies can apply a pressing force to the universal ball from different directions, form a multidirectional fixing effect, offset the deviation trend of the universal ball caused by the air path pressure or external vibration, and improve the locking reliability.

[0012] Preferably, in order to realize the locking and unlocking of the universal ball, the locking assembly comprises a locking screw penetrating through and being screwed on the fixed pipe for contacting the surface of the universal ball and making the universal ball press against the fixed pipe, and a knob arranged outside the fixed pipe and away from the end of the locking screw away from the universal ball; through the screwing cooperation of the locking screw and the fixed pipe, only the knob needs to be turned, the locking screw can press against or separate from the surface of the universal ball, professional tools are not needed, the operator can quickly complete the locking and angle adjustment of the universal ball, and the use convenience is improved.

[0013] Preferably, in order to realize dynamic sealing of the connection between the fixed pipe and the universal ball and the connection between the universal ball and the air nozzle, the telescopic sealing structure comprises a bellows telescopic sleeve sleeved outside the connection between the fixed pipe and the universal ball and the connection between the universal ball and the air nozzle and a clamping assembly arranged at one end of the bellows telescopic sleeve for locking the bellows telescopic sleeve on the air nozzle, and the end of the bellows telescopic sleeve away from the clamping assembly is fixedly connected to the outside of the fixed pipe; the bellows telescopic sleeve has telescopic and bendable characteristics and can deform synchronously with the rotation of the universal ball, always covering the gap between the two connections, and the bellows telescopic sleeve can be tightly locked at one end on the outside of the air nozzle through the clamping assembly, and the other end is fixedly connected to the fixed pipe, forming a closed protection space to isolate external dust and impurities, thereby realizing reliable sealing of the connections, reducing impurity intrusion and prolonging the service life of the universal ball and the fixed pipe without affecting the angle adjustment of the universal ball.

[0014] Preferably, in order to ensure that the bellows telescopic sleeve is tightly fitted to the air nozzle, the clamping assembly comprises an elastic clamp sleeved outside the end of the bellows telescopic sleeve close to the air nozzle, a locking bolt penetrating through the openings of the elastic clamp at both ends, and a nut screwed at one end of the locking bolt for reducing the opening size of the elastic clamp so that the bellows telescopic sleeve is tightly fitted to the outside of the air nozzle; by tightening the nut to drive the locking bolt to reduce the opening size of the elastic clamp, the elastic clamp can exert uniform radial holding force on the bellows telescopic sleeve, so that the bellows telescopic sleeve is tightly fitted to the outer wall of the air nozzle, and vice versa, loosening the nut can loosen the elastic clamp and pull the bellows telescopic sleeve, so that the universal structure can be maintained or operated, thereby reducing impurities entering the universal structure without affecting the operation of the universal structure.

[0015] The novel cylinder and air-filled holding unit form a closed acoustic buffer space through the sound attenuation cavity between the inner cylinder and the outer cylinder, can reflect and attenuate mechanical vibration noise and gas turbulent impact noise generated by the movement of the piston rod for multiple times, and reduce noise; The novel cylinder and air-filled holding unit connect the inner cylinder and the outer cylinder through the heat-conducting support, not only rigidly fix the inner cylinder and the outer cylinder to ensure the stability of the relative position of the two and reduce cylinder wall wear caused by shaking, but also conduct heat generated by the friction of the piston and the compression of the gas from the inner cylinder to the outer cylinder, so as to achieve passive heat dissipation; The novel cylinder and air-filled holding unit are designed in combination of the universal ball, the fixed pipe, the locking assembly and the hose, can flexibly adjust the angle of the air nozzle, so that the air nozzle can be easily rotated to the angle most suitable for connecting the air pipe, realize optimal pipeline layout, reduce installation difficulty and ensure smooth gas passage; The new cylinder and the inflation holding unit cover the connection between the fixed pipe and the universal ball and the connection between the universal ball and the air nozzle through the telescopic sealing structure, can be telescoped synchronously with the angle adjustment of the air nozzle, always maintain a sealed state, reduce the wear caused by the dust and impurities entering the connection between the fixed pipe and the universal ball and the connection between the universal ball and the air nozzle, and ensure the service life of the universal structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a new cylinder; Figure 2 It is a sectional structural schematic diagram of a new cylinder; Figure 3 It is a structural schematic diagram of a new cylinder and an inflation holding unit; Figure 4 It is a sectional structural schematic diagram of a new cylinder and an inflation holding unit; Figure 5 It is a structural schematic diagram of a universal structure and a telescopic sealing structure in an inflation holding unit; Figure 6 It is a structural schematic diagram of a telescopic sealing structure in an inflation holding unit; Figure 7 It is a sectional structural schematic diagram of a universal structure in an inflation holding unit Figure 8 It is an exploded structural schematic diagram of a universal structure in an inflation holding unit.

[0017] In the drawings: 1, cylinder base; 11, air port; 2, inner cylinder; 3, outer cylinder; 4, sound attenuation cavity; 5, heat conduction support; 51, aluminum alloy support; 6, air nozzle; 7, universal structure; 71, fixed pipe; 72, universal ball; 73, locking assembly; 731, locking screw; 732, knob; 74, hose; 8, telescopic sealing structure; 81, corrugated pipe telescopic sleeve; 82, clamping assembly; 821, elastic clamp; 822, locking bolt. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] Embodiment 1 The embodiment provides a novel cylinder body, as shown in the drawings. Figures 1-4 The novel cylinder body comprises a cylinder base 1, an outer cylinder body 3 fixedly arranged on the cylinder base 1, an inner cylinder body 2 coaxially arranged in the outer cylinder body 3 and used for reciprocating movement of a piston rod, and a sound attenuation cavity 4 arranged between the inner cylinder body 2 and the outer cylinder body 3 and used for sound attenuation; the cylinder base 1 is provided with a gas port 11 corresponding to one end of the outer cylinder body 3 and in communication with the inner cylinder body 2 and used for air intake and exhaust; and the sound attenuation cavity 4 is provided with a heat conduction support 5 used for fixing and heat conduction of the inner cylinder body 2 and the outer cylinder body 3.

[0020] In use, the cylinder base 1 serves as a basic support component and provides a stable mounting reference for the outer cylinder body 3; after the outer cylinder body 3 is fixed on the cylinder base 1, the inner cylinder body 2 coaxially arranged in the inner cylinder body 2 becomes a core channel for reciprocating movement of the piston rod; the piston rod reciprocates along the inner wall of the inner cylinder body 2 under the action of internal and external driving forces to realize power transmission; the gas port 11 arranged at the end of the cylinder base 1 corresponding to the outer cylinder body 3 is in communication with the inner cylinder body 2; an external air source enters the inner cylinder body 2 through the gas port 11 to push the piston rod to move, and when the piston rod is reset, the gas in the inner cylinder body 2 is discharged through the gas port 11 to complete a cycle of air intake and exhaust; the sound attenuation cavity 4 between the inner cylinder body 2 and the outer cylinder body 3 can form a closed acoustic buffer space during movement of the piston rod, so that mechanical vibration noise generated by friction between the piston rod and the wall of the inner cylinder body 2 and turbulent impact noise generated when the gas enters and exits the inner cylinder body 2 through the gas port 11 can be transmitted outward after multiple reflections and energy attenuation in the sound attenuation cavity 4 to realize a noise reduction effect; meanwhile, the heat conduction support 5 in the sound attenuation cavity 4 is connected to the inner cylinder body 2 and the outer cylinder body 3 at two ends, respectively; on the one hand, the heat conduction support 5 fixes the inner cylinder body 2 and the outer cylinder body 3 as a whole through its rigid structure to offset the radial force generated by reciprocating movement of the piston rod and avoid relative deviation of the inner cylinder body 2 and the outer cylinder body 3; on the other hand, the heat conduction support 5 conducts heat generated by friction of the piston and compression of the gas to the outer cylinder body 3, and the outer cylinder body 3 dissipates the heat through the surface area in contact with air to realize passive heat dissipation of the inner cylinder body 2 and ensure long-term stable operation of the cylinder body.

[0021] Specifically, the heat conduction support 5 comprises an aluminum alloy support 51 arranged in the sound attenuation cavity 4, and the two ends of the aluminum alloy support 51 are fixedly connected to the outer wall of the inner cylinder body 2 and the inner wall of the outer cylinder body 3, respectively; the aluminum alloy support 51 is provided with a plurality of aluminum alloy supports 51 which are uniformly distributed along the circumference of the inner cylinder body 2. The two ends of the aluminum alloy support 51 are fixedly connected with the outer wall of the inner cylinder body 2 and the inner wall of the outer cylinder body 3 respectively, so that a rigid connection structure between the inner cylinder body 2 and the outer cylinder body 3 can be formed. When the piston rod reciprocates in the inner cylinder body 2, a radial force is generated. At this time, the plurality of aluminum alloy supports 51 distributed uniformly in the circumferential direction of the inner cylinder body 2 can synchronously offset the radial force from different directions, so that the inner cylinder body 2 does not deviate due to unilateral force, and the coaxial stable state of the inner cylinder body 2 and the outer cylinder body 3 is ensured. At the same time, after the inner cylinder body 2 generates heat due to piston friction and gas compression, the aluminum alloy support 51 quickly conducts the heat on the outer wall of the inner cylinder body 2 to the inner wall of the outer cylinder body 3 by using the high heat conduction performance of the aluminum alloy support 51, and then dissipates the heat through the contact between the outer cylinder body 3 and the air, so that the local heat accumulation of the inner cylinder body 2 is reduced, and the overall operation temperature of the cylinder body is stable.

[0022] Example 2 Different from example 1, as shown in Figures 3-8 The application also provides a novel cylinder body inflating holding unit, which comprises a gas nozzle 6 arranged at a position corresponding to the gas port 11 on the cylinder base 1 and a universal structure 7 arranged between the gas nozzle 6 and the gas port 11 for adjusting the angle of the gas nozzle 6. The universal structure 7 comprises a fixed pipe 71 fixedly arranged at a position corresponding to the gas port 11 on the cylinder base 1 and in communication with the gas port 11, a universal ball 72 rotatably connected to one end of the fixed pipe 71 away from the gas port 11, a channel arranged in the universal ball 72 for gas flow, a hose 74 arranged in the fixed pipe 71 for flexible connection of the universal ball 72 and the gas port 11, and a locking assembly 73 arranged on the fixed pipe 71 for locking the position of the universal ball 72 after the universal ball 72 is adjusted to a target angle. The universal ball 72 is rotatable in the fixed pipe 71 by half and is fixedly connected with the gas nozzle 6 by the other half. The two ends of the hose 74 are fixedly connected with the universal ball 72 away from the gas nozzle 6 and the gas port 11 away from the inner cylinder body 2 respectively. The fixed pipe 71 is provided with an extension sealing structure 8 for sealing the rotatable connection between the fixed pipe 71 and the universal ball 72 and the fixed connection between the universal ball 72 and the gas nozzle 6.

[0023] In use, the operator can rotate the gas nozzle 6 to drive the universal ball 72 to rotate in the fixed pipe 71, so as to adjust the gas nozzle 6 to the target angle adapted to the external gas pipe, wherein the hose 74 in the fixed pipe 71 is fixedly connected at both ends with the universal ball 72 away from the side of the gas nozzle 6 and the gas port 11 away from the end of the inner cylinder body 2, and in the process of rotating the universal ball 72, the hose 74 can be flexibly deformed with the change of the angle, so as to always keep the gas port 11 in communication with the gas passage of the universal ball 72, when the gas nozzle 6 is adjusted to the target angle, the position of the universal ball 72 can be locked by operating the locking assembly 73 on the fixed pipe 71, so as to prevent the angle deviation of the universal ball 72 due to the gas passage pressure or external vibration in the subsequent inflation process, at the same time, the telescopic sealing structure 8 is sleeved outside the rotating connection between the fixed pipe 71 and the universal ball 72 and the fixed connection between the universal ball 72 and the gas nozzle 6, can be telescoped synchronously with the rotation of the universal ball 72, always seals the gap between the two connections, reduces the entry of dust and impurities into the connection, and guarantees the long-term reliable operation of the inflation holding unit, in addition, the passage in the universal ball 72 is used for gas flow In order to realize the connection of the gas nozzle 6 and the external pipeline, the end of the gas nozzle 6 away from the universal ball 72 is provided with an external thread for screwing and mating connection with the internal thread of the external pipeline, the external thread of the gas nozzle 6 can be screwed and matched with the internal thread of the external pipeline to form a closely fitted surface, which simplifies the butt joint operation of the gas nozzle 6 and the external pipeline and facilitates installation.

[0024] Specifically, the locking assembly 73 is provided with at least two, the locking assembly 73 comprises a locking screw 731 penetrating through and being screwed on the fixed pipe 71 for contacting the surface of the universal ball 72, so that the universal ball 72 is tightly pressed in the fixed pipe 71, and a knob 732 provided outside the fixed pipe 71 and away from the end of the locking screw 731 away from the universal ball 72; When the gas nozzle 6 drives the universal ball 72 to rotate to the target angle in the fixed pipe 71, the operator can hold the knob 732 outside the fixed pipe 71 and rotate, since the knob 732 is fixedly connected with the end of the locking screw 731 away from the universal ball 72, rotating the knob 732 will drive the locking screw 731 to rotate synchronously, and since the locking screw 731 penetrates through the fixed pipe 71 and is screwed and matched with the fixed pipe 71, under the action of screw transmission, the locking screw 731 will move along the fixed pipe 71 in the direction of approaching the universal ball 72 until the end thereof tightly contacts the surface of the universal ball 72, by the locking screw 731 of the at least two locking assemblies 73 applying pressing force to the universal ball 72 from different directions, the universal ball 72 can be tightly pressed in the fixed pipe 71, so as to avoid the angle deviation of the universal ball 72 due to the gas passage pressure or external vibration in the subsequent inflation process, and guarantee the angle stability of the gas nozzle 6, when it is needed to adjust the angle of the gas nozzle 6 again, the knob 732 can be reversely rotated to drive the locking screw 731 away from the universal ball 72, so as to release the locking of the universal ball 72, and then the gas nozzle 6 can be rotated to adjust the angle.

[0025] Further, the telescopic sealing structure 8 comprises a bellows telescopic sleeve 81 sleeved outside the connecting portions of the fixed tube 71 and the universal ball 72 and the connecting portion of the universal ball 72 and the air nozzle 6, and a clamping assembly 82 arranged at one end of the bellows telescopic sleeve 81 for locking the bellows telescopic sleeve 81 on the air nozzle 6, and the other end of the bellows telescopic sleeve 81 away from the clamping assembly 82 is fixedly connected to the outside of the fixed tube 71; the clamping assembly 82 comprises an elastic clamp 821 sleeved outside the end of the bellows telescopic sleeve 81 close to the air nozzle 6, a locking screw 822 penetrating through the two ends of the opening of the elastic clamp 821, and a nut screwed on one end of the locking screw 822 for reducing the opening size of the elastic clamp 821 so that the bellows telescopic sleeve 81 tightly fits the outside of the air nozzle 6; The bellows telescopic sleeve 81 is sleeved outside the connecting portions of the fixed tube 71 and the universal ball 72 and the connecting portion of the universal ball 72 and the air nozzle 6, and the other end of the bellows telescopic sleeve 81 away from the clamping assembly 82 is fixedly connected to the outside of the fixed tube 71, preliminarily covering the sealing area, then the elastic clamp 821 in the clamping assembly 82 is sleeved outside the end of the bellows telescopic sleeve 81 close to the air nozzle 6, and the locking screw 822 penetrating through the two ends of the opening of the elastic clamp 821 is in a state of being ready to be fastened, then the nut screwed on one end of the locking screw 822 is tightened, and under the screwing cooperation of the nut and the locking screw 822, the opening size of the elastic clamp 821 is gradually reduced, a uniform radial holding force is applied to the bellows telescopic sleeve 81, and the bellows telescopic sleeve 81 is forced to tightly fit the outside of the air nozzle 6, so that the bellows telescopic sleeve 81 is stably fixed on the air nozzle 6, forming a closed sealing space, when the air nozzle 6 drives the universal ball 72 to rotate in the fixed tube 71 to adjust the angle, the bellows telescopic sleeve 81 deforms synchronously with the angle change of the connecting portions due to its telescopic and bendable characteristics, always covering the two connecting gaps, reducing gas leakage and dust and impurities intrusion, on the contrary, only the nut is loosened to restore the opening size of the elastic clamp 821, the elastic clamp 821 can be removed, the bellows telescopic sleeve 81 is telescoped, and the universal structure 7 can be maintained or operated, etc., and then the above steps are repeated to re-seal.

[0026] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical solution and concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A novel cylinder block, characterized in that: It includes a cylinder seat (1), an outer cylinder body (3) fixedly mounted on the cylinder seat (1), an inner cylinder body (2) coaxially mounted inside the outer cylinder body (3) for reciprocating movement of the piston rod, and a noise reduction chamber (4) disposed between the inner cylinder body (2) and the outer cylinder body (3) for noise reduction. The cylinder seat (1) is provided with an air port (11) at one end corresponding to the outer cylinder body (3) for air intake and exhaust, which communicates with the interior of the inner cylinder body (2). The silencing cavity (4) is provided with a heat-conducting support (5) for fixing and conducting heat to the inner cylinder (2) and the outer cylinder (3).

2. The novel cylinder block according to claim 1, characterized in that: The heat-conducting support (5) includes an aluminum alloy bracket (51) disposed in the silencing cavity (4), and the two ends of the aluminum alloy bracket (51) are fixedly connected to the outer wall of the inner cylinder (2) and the inner wall of the outer cylinder (3), respectively.

3. The novel cylinder block according to claim 2, characterized in that: Multiple aluminum alloy brackets (51) are provided, and the multiple aluminum alloy brackets (51) are evenly distributed along the circumference of the inner cylinder (2).

4. An air-filling holding unit for use in the novel cylinder body according to any one of claims 1-3, characterized in that: It includes air nozzles (6) respectively set on the cylinder base (1) at the positions corresponding to the air ports (11) and a universal structure (7) set between the air nozzles (6) and the air ports (11) for adjusting the angle of the air nozzles (6). The universal structure (7) includes a fixed tube (71) fixedly installed on the cylinder seat (1) at the position corresponding to the air port (11) and communicating with the air port (11), a universal ball (72) rotatably connected to the end of the fixed tube (71) away from the air port (11), a channel for gas flow provided in the universal ball (72), a flexible hose (74) provided in the fixed tube (71) for flexible air path connection between the universal ball (72) and the air port (11), and a locking component (73) provided on the fixed tube (71) for locking the position of the universal ball (72) after it is adjusted to the target angle. Half of the universal ball (72) rotates in the fixed tube (71), and the other half is fixedly connected to the air nozzle (6). The two ends of the hose (74) are fixedly connected to the side of the universal ball (72) away from the air nozzle (6) and the end of the air port (11) away from the inner cylinder (2), respectively. The fixed tube (71) is provided with a telescopic sealing structure (8) that seals the rotating connection between the fixed tube (71) and the universal ball (72) and the fixed connection between the universal ball (72) and the air nozzle (6).

5. The inflatable holding unit according to claim 4, characterized in that: The end of the air nozzle (6) away from the universal ball (72) is provided with an external thread for connecting with the internal thread of an external pipe.

6. The inflatable holding unit according to claim 4, characterized in that: The locking component (73) is provided in at least two parts.

7. The inflatable holding unit according to claim 6, characterized in that: The locking assembly (73) includes a locking screw (731) that passes through the fixing tube (71) and is screwed onto the fixing tube (71) for contacting the surface of the universal ball (72) so that the universal ball (72) is pressed against the fixing tube (71), and a knob (732) disposed on the outside of the fixing tube (71) and away from the end of the locking screw (731) away from the universal ball (72).

8. The inflatable holding unit according to claim 4, characterized in that: The telescopic sealing structure (8) includes a bellows telescopic sleeve (81) sleeved on the outside of the connection between the fixed tube (71) and the universal ball (72) and the connection between the universal ball (72) and the air nozzle (6), and a clamping component (82) provided at one end of the bellows telescopic sleeve (81) for locking the bellows telescopic sleeve (81) onto the air nozzle (6). The end of the bellows telescopic sleeve (81) away from the clamping component (82) is fixedly connected to the outside of the fixed tube (71).

9. The inflatable holding unit according to claim 8, characterized in that: The clamping assembly (82) includes an elastic clamp (821) sleeved on the outer side of the bellows telescopic sleeve (81) near the air nozzle (6), a locking bolt (822) passing through both ends of the opening of the elastic clamp (821), and a nut screwed to one end of the locking bolt (822) to reduce the opening size of the elastic clamp (821) so that the bellows telescopic sleeve (81) fits tightly against the outer side of the air nozzle (6).

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