Double-acting air cylinder, air cylinder assembly and vehicle

Abstract

The embodiment of the utility model provides a double-acting air cylinder, an air cylinder assembly and a vehicle, the air cylinder comprises a cylinder body, a piston, a piston rod and an elastic component, the cylinder body is provided with a cavity and a telescopic opening communicated with the cavity, the piston is arranged in the cavity in a sliding mode, the piston rod penetrates through the telescopic opening, the piston rod is connected to the piston, and the elastic component is arranged in the cavity. The elastic component is arranged in the cavity, and the two ends of the elastic component elastically abut against the piston and the inner wall of the cylinder body respectively. The elastic component is arranged in the double-acting air cylinder provided by the embodiment of the utility model, and the elastic component is in the compressed state and keeps elastically abutting against the piston. The double-acting air cylinder provided by the embodiment of the invention can be applied to the locking mechanism, and when the piston rod extends, the locking mechanism can be in a locking state. When the air cylinder is cut off accidentally, the elastic component is kept to abut against the piston so that the piston rod can be kept in the stretching-out state, the locking mechanism can be kept in the locking state, and therefore safety and reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of air cylinder especially relates to a double acting cylinder, air cylinder subassembly and vehicle. BACKGROUND

[0002] In the related art, the locking mechanism includes a cylinder and a locking part, the cylinder includes a cylinder body, a piston and a piston rod, the piston is arranged in the cylinder body, and the piston rod extends into the cylinder body at one end and is connected to the piston. The cylinder body is provided with two air vents on both sides of the piston. One of the two air vents is supplied with air by an external air source, and the other is in an exhaust state, so that the piston can be controlled to move along the cylinder barrel. The piston moves along the cylinder body to drive the piston rod to move synchronously along the cylinder body. The piston rod is connected to the locking part. When the piston rod is in an elongated state, the locking part is in a locked state. When the cylinder is accidentally disconnected, the piston rod will move in the opposite direction when the locking part is subjected to an external force, causing the locking mechanism to fail, thereby causing safety hazards and affecting the reliability of the locking mechanism. SUMMARY

[0003] To solve one of the above technical problems, the utility model provides a double acting cylinder, air cylinder subassembly and vehicle.

[0004] The utility model adopts the following technical scheme:

[0005] The first purpose of the present application is to provide a double acting cylinder, which comprises:

[0006] A cylinder body has a cavity and an expansion opening communicating with the cavity;

[0007] A piston is slidably arranged in the cavity;

[0008] A piston rod is arranged through the expansion opening, and the piston rod is connected to the piston;

[0009] An elastic part is arranged in the cavity, and the two ends of the elastic part are elastically abutted against the piston and the inner wall of the cylinder body respectively.

[0010] Optionally, the elastic part is a spring, and the ratio of the outer diameter of the elastic part to the inner diameter of the cavity is 1:(1-2).

[0011] Optionally, the ratio of the natural length of the elastic part to the extension length of the cavity is 1:(0.3-0.7).

[0012] Optionally, the cylinder body has a cylinder barrel, a front cover and a rear cover;

[0013] The cylinder barrel has a cavity and two openings communicating with the cavity;

[0014] The front cover and the rear cover are connected to the cylinder barrel, and the front cover and the rear cover cover the corresponding openings respectively;

[0015] The telescopic opening is arranged on the front cover, and the piston is in sealing fit with the inner wall of the cylinder barrel;

[0016] One end of the elastic component abuts against the rear cover.

[0017] Optionally, a limiting block is arranged in the middle of the rear cover;

[0018] When the piston rod is retracted to the limit position, the piston abuts against the limiting block.

[0019] Optionally, an inner boss is arranged in the middle of the rear cover, the limiting block has a groove, the inner boss is inserted into the groove, and the limiting block and the inner boss are fixedly connected.

[0020] Optionally, the elastic component is a spring;

[0021] The limiting block is located on the inner side of the spring.

[0022] The ratio of the outer diameter of the limiting block to the inner diameter of the spring is 1:(1-1.2).

[0023] Optionally, a sealing ring is arranged between the front cover and the cylinder barrel, and a sealing ring is arranged between the rear cover and the cylinder barrel.

[0024] Optionally, the piston rod comprises a main rod body and a movable rod, the main rod body is arranged through the telescopic opening, one end of the main rod body is connected to the piston, the other end of the main rod body has a ball groove, the movable rod has a ball head, and the ball head is movably accommodated in the ball groove.

[0025] Optionally, the double-acting cylinder comprises a guide sleeve, the guide sleeve is arranged on the inner side of the telescopic opening, and the guide sleeve is fixed to the cylinder barrel;

[0026] The piston rod is slidably arranged through the guide sleeve.

[0027] Optionally, the double-acting cylinder comprises a dustproof sleeve;

[0028] The dustproof sleeve is arranged on the inner side of the telescopic opening.

[0029] The piston rod is slidably arranged through the dustproof sleeve.

[0030] Optionally, the double-acting cylinder comprises a magnetic ring;

[0031] The magnetic ring is sleeved on the piston.

[0032] The second object of the application is to provide a cylinder assembly, comprising:

[0033] A double-acting cylinder is provided with two air passages;

[0034] A control valve is connected to an air source, and is connected to the two air passages by pipes respectively, and the control valve controls the air to flow into one of the two air passages and controls the other one to exhaust air to control the movement of the piston along the cylinder.

[0035] The third object of the present application is to provide a vehicle comprising:

[0036] A vehicle body;

[0037] The above-mentioned cylinder assembly, the cylinder of which is connected to the vehicle body;

[0038] A locking member is connected to the piston rod of the double-acting cylinder;

[0039] A battery box is detachably mounted on the vehicle body;

[0040] In the state that the battery box is mounted on the vehicle body, the cylinder assembly can drive the locking member to move to limit the battery box and lock the battery box.

[0041] By adopting the above technical solutions, the present application has the following beneficial effects:

[0042] The double-acting cylinder provided by the embodiment of the present disclosure can be applied to a locking mechanism, and when the piston rod is elongated, the locking mechanism can be in a locked state. When the cylinder is unexpectedly disconnected, the elastic member keeps abutting against the piston to keep the piston rod in an extended state, so that the locking mechanism keeps in a locked state, thereby improving the safety and reliability.

[0043] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0044] The accompanying drawings are part of the present application and serve to provide a further understanding of the present application, and the schematic embodiments of the present application and the description thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0045] Figure 1 Fig. 1 shows the appearance structure schematic diagram of the double-acting cylinder provided by the embodiment of the present disclosure;

[0046] Figure 2A cross-sectional view of a double-acting cylinder is shown.

[0047] In the figure: 4, double-acting cylinder; 411, cylinder barrel; 412, front cover; 413, rear cover; 4131, limiting block; 42, piston; 43, piston rod; 431, main rod body; 4311, ball groove; 432, movable rod; 4321, ball head; 44, elastic component; 45, sealing ring; 46, guide sleeve; 47, dustproof sleeve; 48, magnetic ring; 49, piston ring; 410, wear-resistant band.

[0048] It should be noted that the drawings and the written description are not intended to limit the scope of the present application in any way, but are merely to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0050] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0051] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] Reference is made to Figure 1 and Figure 2As shown, the double-acting cylinder 4 provided by the embodiment of the present disclosure comprises a cylinder body, a piston 42, a piston rod 43 and an elastic component 44. The cylinder body has a cavity and an expansion opening communicating with the cavity, the piston 42 is slidably arranged in the cavity, the cylinder body is provided with two air vents on both sides of the piston 42, the two air vents respectively communicate with a gas source, the piston rod 43 is arranged through the expansion opening, the piston rod 43 is connected to the piston 42, and the elastic component 44 is arranged in the cavity and elastically abuts against the inner wall of the cylinder body and the piston 42 at both ends. By controlling one of the two air vents to intake air and the other to exhaust air, the piston 42 can be moved along the cylinder barrel 411.

[0053] The double-acting cylinder 4 provided by the embodiment of the present disclosure can be applied to a locking mechanism. When the piston rod 43 is elongated, the locking mechanism can be in a locked state. When the cylinder is accidentally broken, the elastic component 44 keeps abutting against the piston 42, so that the piston rod 43 keeps an extended state, and the locking mechanism keeps the locked state, thereby improving safety and reliability. The piston 42 divides the cavity into a front cavity and a rear cavity, the two air vents respectively communicate with the front cavity and the rear cavity, when air is pumped into the rear cavity and the front cavity is exhausted, the piston rod 43 is in an elongated state, at this time, in addition to the piston force provided by the gas in the cylinder, the elastic component 44 also provides a larger elastic force to the piston 42, thereby ensuring the output force of the cylinder under the same cylinder diameter, and improving safety and reliability.

[0054] In some possible embodiments, as shown, the elastic component is a spring, and a ratio of an outer diameter of the elastic component to an inner diameter of the cavity is 1:(1-2). Figure 2

[0055] The elastic component of the present application selects a cylindrical spring, which has a high carrying capacity and can remain stable when bearing a large load. The spring can bear a large force and torque in the cylinder body, thereby improving the stability and reliability of the equipment. In the embodiment of the present application, the outer diameter of the spring component is large and close to the inner diameter of the cavity. A large number of experiments have verified that when the ratio of the outer diameter of the elastic component to the inner diameter of the cavity is 1:(1-2), the spring can be limited by the inner wall of the cylinder body, keep an appropriate extension direction, effectively abut against the piston for a long time, provide stable and effective elastic force to the piston, and is not prone to skewing to affect the stability of the elastic force applied by the spring to the piston, thereby improving the reliability and durability of the cylinder. In a preferred embodiment, the ratio of the outer diameter of the elastic component to the inner diameter of the cavity is 1:1.52.

[0056] In some possible embodiments, a ratio of a natural length of the elastic component to an extension length of the cavity is 1:(0.3-0.7).

[0057] ​It should be noted that the natural length of the elastic component can be understood as the natural length of the spring without external force. The extension length of the cavity can be understood as the extension length of the cavity along the extension direction of the piston rod. The natural length of the elastic component affects whether the piston can be stably and effectively applied with the elastic force without the problem of sudden interruption of the elastic force on the piston. Through a large number of experiments, it is verified that when the ratio of the natural length of the elastic component to the extension length of the cavity is 1:(0.3-0.7), the spring can effectively apply the elastic force to the piston during the long-term operation of the cylinder, and the spring is not prone to skewing, thereby improving the reliability and durability of the cylinder. In a preferred embodiment, the ratio of the natural length of the elastic component to the extension length of the cavity is 1:0.49.

[0058] In some possible embodiments, as shown in Figure 1 The cylinder body has a cylinder barrel 411, a front cover 412 and a rear cover 413. The cylinder barrel 411 has a cavity and two openings communicating with the cavity. The front cover 412 and the rear cover 413 are connected to the cylinder barrel 411, and the front cover 412 and the rear cover 413 cover the corresponding openings, respectively. The telescopic opening is arranged on the front cover 412, the piston 42 is in sealing cooperation with the inner wall of the cylinder barrel 411, and the elastic component 44 is abutted against the rear cover 413. In the embodiment of the disclosure, the front cover 412 and the rear cover 413 are detachably connected to the cylinder barrel 411, thereby avoiding the difficulty in subsequent maintenance caused by the integral stretching of the rear cover 413 and the cylinder barrel 411.

[0059] In some possible embodiments, a sealing ring 45 is arranged between the front cover 412 and the cylinder barrel 411, and a sealing ring 45 is arranged between the rear cover 413 and the cylinder barrel 411. For example, an O-shaped sealing ring is arranged between the rear cover 413 and the cylinder barrel 411, so as to seal the gap between the rear cover 413 and the cylinder barrel 411. An O-shaped sealing ring is also arranged between the front cover 412 and the cylinder barrel 411, so as to seal the gap between the front cover 412 and the cylinder barrel 411.

[0060] In some possible embodiments, a limiting block 4131 is arranged in the middle of the rear cover 413, the limiting block 4131 is located in the cavity and extends to the side of the front cover 412, and when the piston rod 43 is retracted to the limit position, the piston 42 is abutted against the limiting block 4131. The limiting block 4131 can be a flexible structure, for example, the limiting block 4131 can be a hard rubber structure. The limiting block 4131 has a buffering effect on the piston 42, so as to reduce the moving speed of the piston 42 and finally stop the movement of the piston 42, thereby avoiding the direct contact of the piston 42 with the rear cover 413.

[0061] In some possible embodiments, the rear cover 413 has an inner protrusion in the middle, the limiting block 4131 has a groove, the inner protrusion is inserted into the groove, and the limiting block 4131 and the inner protrusion are fixedly connected. The rear cover 413 and the limiting block 4131 are fixedly connected, and the rear cover 413 and the limiting block 4131 form an integrated structure. The limiting block 4131 and the rear cover 413 can be connected by an injection molding process.

[0062] In some possible embodiments, the elastic component 44 is a spring, and the limiting block 4131 is located on the inner side of the spring. The ratio of the outer diameter of the limiting block 4131 to the inner diameter of the spring is 1:(1-1.2). The outer diameter of the elastic component 44 is greater than the outer diameter of the limiting block 4131, and the elastic component 44 does not interfere with the limiting block 4131. The outer diameter of the elastic component 44 is close to the inner diameter of the cylinder barrel 411, so that the elastic component 44 can be limited by the inner wall of the cylinder barrel 411 and cannot be tilted. In a preferred embodiment, the ratio of the outer diameter of the limiting block 4131 to the inner diameter of the spring is 1:1.04.

[0063] In some possible embodiments, the piston rod 43 includes a main rod body 431 and a movable rod 432. The main rod body 431 passes through the telescopic opening, one end of the main rod body 431 is connected to the piston 42, and the other end of the main rod body 431 has a ball groove 4311. The movable rod 432 has a ball head 4321, and the ball head 4321 is movably accommodated in the ball groove 4311.

[0064] The ball head 4321 and the ball groove 4311 are used between the main rod body 431 and the movable rod 432, so that the movable rod 432 can automatically adjust the angle and position under the action of an external force, thereby improving the compatibility with corresponding structural members in the locking mechanism.

[0065] In some possible embodiments, the double-acting cylinder 4 can include a guide sleeve 46, the guide sleeve 46 is arranged on the inner side of the telescopic opening, and the guide sleeve 46 is fixed to the cylinder barrel. The piston rod 43 slidably passes through the guide sleeve 46.

[0066] The telescopic opening can be arranged on the front cover 412, and the guide sleeve 46 can be arranged on the front cover 412. The piston rod 43 slidably passes through the guide sleeve 46, for example, the main rod body 431 of the piston rod 43 passes through the guide sleeve 46, and the guide sleeve 46 is arranged so that the main rod body 431 of the piston rod 43 can move in a straight line.

[0067] In some possible embodiments, the double-acting cylinder 4 further comprises a dust cover 47 arranged inside the telescopic opening, and the piston rod 43 is slidably arranged through the dust cover 47. The dust cover 47 seals the gap between the piston rod 43 and the cylinder body, so that the double-acting cylinder 4 can reduce the entry of dust when working in an environment with a large amount of dust, ensure normal use of the cylinder, prolong the service life of the cylinder, and keep the cylinder in good working condition.

[0068] In some possible embodiments, the double-acting cylinder 4 comprises a magnetic ring 48 arranged on the piston 42. A magnetic switch can be arranged on the cylinder body or other positions outside the cylinder body. When the piston 42 moves and passes by the magnetic switch, the magnetic switch can be triggered to generate a corresponding induction signal. By arranging the magnetic ring 48 on the piston 42, the double-acting cylinder 4 can cooperate with the magnetic switch to automatically and wirelessly obtain the cylinder extension and retraction signals. For example, the magnetic switch can be arranged at a limit position corresponding to the piston 42 near the rear cover 413, so that when the piston 42 of the cylinder retracts to the limit position, the magnetic switch can be triggered to generate a signal indicating that the piston 42 is in place, and at this time, the injection of gas into the front cavity of the cylinder body can be controlled to stop.

[0069] The structural members of the double-acting cylinder 4 provided by the embodiments of the present disclosure can be made of high-temperature-resistant and low-temperature-resistant materials. Therefore, the double-acting cylinder 4 can be used for a long time at a temperature of-35℃ to 120℃.

[0070] In some possible embodiments, the double-acting cylinder 4 comprises a wear-resistant band 410, which can be arranged on the piston 42. The wear-resistant band 410 can effectively reduce the sealing pressure between the cylinder barrel 411 and the piston 42, and prolong the service life of the cylinder. The double-acting cylinder 4 can further comprise a piston ring 49 arranged on the piston 42 and moving synchronously with the piston 42, and the piston ring 49 can be used to seal the gap between the piston 42 and the inner wall of the cylinder barrel 411. The wear-resistant band 410 can be arranged outside the magnetic ring 48.

[0071] The embodiments of the present disclosure further provide a cylinder assembly, which comprises a control valve and the double-acting cylinder described above. The double-acting cylinder is provided with two air ports, and the control valve is connected to a gas source and connected to the two air ports through pipelines. The control valve controls the injection of gas into one of the two air ports and controls the exhaust of the other air port to control the movement of the piston along the cylinder body. The control valve can be a two-position two-way electromagnetic valve, a two-position three-way electromagnetic valve, a three-position five-way electromagnetic valve, or the like.

[0072] The application also provides a vehicle, comprising a vehicle body, a locking piece, a battery box and the above-mentioned cylinder assembly, the cylinder body of the cylinder assembly is connected to the vehicle body, the locking piece is connected to the piston rod of the double-acting cylinder, and the battery box is detachably installed on the vehicle body; in the state that the battery box is installed on the vehicle body, the cylinder assembly can drive the locking piece to move to limit the battery box and lock the battery box.

[0073] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and the equivalent embodiments with equivalent changes are equivalent. Any simple modification, equivalent change and modification of the above-mentioned embodiments according to the technical essence of the present application still belong to the scope of the present application.

Claims

1. A double-acting pneumatic cylinder, characterized by The utility model relates to a double-acting cylinder, comprising: a cylinder body having a cavity and an extension opening communicating with the cavity; a piston slidably arranged in the cavity; a piston rod arranged through the extension opening and connected to the piston; a resilient member arranged in the cavity and resiliently abutting against the piston and the inner wall of the cylinder body at both ends thereof.

2. Double-acting cylinder according to claim 1, characterized in that The resilient member is a spring, and the ratio of the outer diameter of the resilient member to the inner diameter of the cavity is 1:(1-2).

3. Double-acting cylinder according to claim 2, characterized in that The ratio of the natural length of the resilient member to the extension length of the cavity is 1:(0.3-0.7).

4. The double-acting cylinder of claim 1, wherein The cylinder body has a cylinder barrel, a front cover and a rear cover. The cylinder barrel has a cavity and two openings communicating with the cavity. The front cover and the rear cover are connected to the cylinder barrel, and the front cover and the rear cover cover the corresponding openings respectively. The extension opening is arranged on the front cover, and the piston and the inner wall of the cylinder barrel are in sealing cooperation. One end of the resilient member abuts against the rear cover.

5. Double-acting cylinder according to claim 4, characterized in that A limiting block is arranged in the middle of the rear cover, and the piston abuts against the limiting block when the piston rod is retracted to the limit position.

6. Double-acting cylinder according to claim 5, characterized in that An inner boss is arranged in the middle of the rear cover, the limiting block has a groove, the inner boss is inserted into the groove, and the limiting block and the inner boss are fixedly connected.

7. Double-acting cylinder according to claim 6, characterized in that The resilient member is a spring, the limiting block is located on the inner side of the spring, and the ratio of the outer diameter of the limiting block to the inner diameter of the spring is 1:(1-1.2).

8. Double-acting cylinder according to claim 4, characterized in that Sealing rings are arranged between the front cover and the cylinder barrel and between the rear cover and the cylinder barrel.

9. The double-acting air cylinder of claim 1, wherein, The piston rod comprises a main rod body and a movable rod, the main rod body is arranged through the extension opening, one end of the main rod body is connected to the piston, the other end of the main rod body has a ball groove, and the movable rod has a ball head which is movably accommodated in the ball groove.

10. The double-acting cylinder of claim 1, wherein, A guide sleeve is arranged in the inner side of the extension opening and is fixed to the cylinder body. The piston rod is slidably arranged through the guide sleeve.

11. Double-acting cylinder according to claim 1, characterized in that A dustproof sleeve is arranged. The dustproof sleeve is arranged in the inner side of the extension opening. The piston rod is slidably arranged through the dustproof sleeve.

12. Double-acting cylinder according to any of claims 1-11, characterized in that A magnetic ring is arranged. The magnetic ring is sleeved on the piston.

13. A cylinder assembly characterized by, The utility model relates to a double-acting cylinder, comprising: two air vents arranged on the double-acting cylinder; a control valve connected to a gas source, the control valve being connected to the two air vents through pipelines respectively, and the control valve controlling the gas to flow into one of the two air vents and controlling the other one of the two air vents to exhaust to control the piston to move along the cylinder body.

14. A vehicle characterized by comprising: The utility model relates to a double-acting cylinder, comprising: a vehicle body; the cylinder assembly of claim 13, the cylinder body of the cylinder assembly being connected to the vehicle body; a locking member connected to the piston rod of the double-acting cylinder; a battery box which is detachably mounted to the vehicle body; in the state that the battery box is mounted to the vehicle body, the cylinder assembly can drive the locking member to move to limit the battery box and lock the battery box.

Images