Necking device and method for end cover of LNG (Liquefied Natural Gas) cylinder

Abstract

The invention provides an LNG cylinder end cover necking device and method, and relates to the technical field of automobile parts, and the LNG cylinder end cover necking device comprises a workbench; the locking mechanism is arranged on the working table, the locking mechanism is provided with a locking position for locking the gas cylinder to be machined, and the locking mechanism is provided with an unlocking position for unlocking the gas cylinder to be machined; the rotating mechanism is located below the workbench, and the rotating mechanism is in transmission connection with the locking mechanism; and the machining mechanism is located on the workbench, the machining mechanism is movably arranged in the radial direction of a to-be-machined gas cylinder placed on the workbench, the machining mechanism is used for reducing the diameter of a cylinder opening of the to-be-machined gas cylinder to a preset target value, and the problems that in the prior art, products produced through an LNG cylinder end cover necking-down technology are low in precision and poor in surface quality are solved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to a device and method for shrinking an end cover of an LNG gas cylinder. Background Art

[0002] In recent years, the development momentum of LNG commercial vehicles has been rapid, and the demand for LNG cylinders has also been increasing. At present, the end of the LNG cylinder is mainly formed by the wedge of the mold. Since the working principle of the wedge mold is that multiple forming inserts move from the periphery to the middle, and the product is in a multi-material state during the entire shrinking forming process, wrinkles and other traces will be left at multiple knife positions on the surface of the product during the forming process, resulting in low product precision, poor surface quality and other problems. In addition, since the punch cannot be completely filled in the workpiece in this process, the local forming process of the workpiece will be in a free state, so this forming process has poor production stability.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The main purpose of the present invention is to provide a device and method for shrinking the end cap of an LNG cylinder to solve the problems of low precision and poor surface quality of products produced by the shrinking process of the end cap of the LNG cylinder in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a shrinking device for the end cap of an LNG gas cylinder is provided. The shrinking device for the end cap of an LNG gas cylinder comprises: a workbench; a locking mechanism, which is arranged on the workbench, and has a locking position for locking the gas cylinder to be processed, and an unlocking position for unlocking the gas cylinder to be processed; a rotating mechanism, which is located below the workbench and is transmission-connected to the locking mechanism; a processing mechanism, which is located on the workbench, and is movably arranged along the radial direction of the gas cylinder to be processed placed on the workbench, and is used to reduce the diameter of the bottle mouth of the gas cylinder to be processed to a preset target value.

[0006] Furthermore, the locking mechanism is arranged inside the gas cylinder to be processed. When the locking mechanism is in the locking position, the outer surface of the locking mechanism contacts the inner surface of the gas cylinder to be processed. When the locking mechanism is in the unlocking position, the outer surface of the locking mechanism is disengaged from the inner surface of the gas cylinder to be processed.

[0007] Furthermore, a first through hole is provided on the workbench, at least part of the rotating mechanism is arranged through the first through hole, the rotating mechanism has a hollow cavity, at least part of the locking mechanism is located in the hollow cavity, and the bottom of another part of the locking mechanism is connected to at least part of the rotating mechanism.

[0008] Furthermore, the locking mechanism includes: a cylinder, which is arranged in a hollow cavity; a support block, which is arranged on at least part of the rotating mechanism, and a plurality of exhaust holes are provided on the upper surface of the support block, and the support block has a accommodating cavity; a first transmission assembly, at least part of the first transmission assembly is located in the accommodating cavity, and another part of the first transmission assembly is located outside the accommodating cavity, and at least part of the first transmission assembly is connected to the cylinder; controlling the movement of the cylinder can enable at least part of the first transmission assembly to have a first state of radially expanding to a locking position, and a second state of radially contracting to an unlocking position.

[0009] Furthermore, the first transmission component of the locking mechanism includes: a primary transmission member, which is arranged in the accommodating cavity, and the cylinder is connected to the bottom of the primary transmission member; a secondary transmission member, which is arranged on at least part of the rotating mechanism, and the secondary transmission member is arranged at intervals along the circumference of the primary transmission member, and the secondary transmission member is obliquely connected to the primary transmission member; a tertiary transmission member, which is arranged along the circumference of the support block, and the secondary transmission member is obliquely connected to the tertiary transmission member; controlling the cylinder to extend can make the primary transmission member move upward, drive the secondary transmission member to make a circular motion, and then drive the tertiary transmission member to expand radially to the locking position.

[0010] Furthermore, the locking mechanism comprises: an elastic member, which is arranged along the inner ring of the three-stage transmission member.

[0011] Furthermore, the rotating mechanism includes: a support seat, which is arranged on the workbench and is located at the first through hole, and the support seat has a second through hole; a pad, which is located on the support seat and has a third through hole; a guide plate, which is located on the pad and has a limit pin, and has a fourth through hole, and at least part of the locking mechanism is provided on the guide plate, and the first through hole, the second through hole, the third through hole, and the fourth through hole are connected to form a hollow cavity; a first driving member, which is arranged on the workbench; a second transmission assembly, one end of the second transmission assembly is connected to the first driving member, and the other end of the second transmission assembly is connected to the bottom of the pad; controlling the first driving member to rotate, driving the second transmission assembly to rotate, so as to drive the pad and the guide plate to make a circular motion, so that at least part of the locking mechanism can make a circular motion, and then drive the gas cylinder to be processed to make a circular motion.

[0012] Furthermore, the second transmission assembly includes: a driving gear, which is transmission-connected to the first driving member; a driven gear, which is meshed with the driving gear, the gear center of the driven gear is connected to the third through hole, and the end plane of the driven gear is connected to the bottom surface of the pad.

[0013] Furthermore, the processing mechanism includes: a second driving member, which is arranged on the workbench; a processing member, which is electrically connected to the second driving member, and the second driving member is used to drive the processing member to perform linear motion along the radial direction of the gas cylinder to be processed.

[0014] According to another aspect of the present invention, a method for shrinking an end cap of an LNG cylinder is provided. The method is performed using the shrinking device for an end cap of an LNG cylinder according to the above-mentioned embodiment of the claim, and the method comprises: placing a gas cylinder to be processed on a support block, with the inner surface of the gas cylinder to be processed being placed in contact with the upper surface of the support block; controlling a locking mechanism to lock the gas cylinder to be processed; controlling a rotating mechanism to rotate, driving the gas cylinder to be processed in a locked state to perform circular motion; controlling a processing part of the processing mechanism to contact the gas cylinder to be processed, and the processing part to perform linear motion along the radial direction of the gas cylinder to be processed until the processing part moves to a set displacement, so that the processing part squeezes the bottle mouth position of the gas cylinder to be processed during the movement, so that the outer diameter at the bottle mouth of the gas cylinder to be processed meets the preset target value.

[0015] By applying the technical solution of the present invention, a locking mechanism is set. When the locking mechanism is in a locked state, the rotating mechanism is controlled to drive at least the locking mechanism to be rotatably set to drive the gas cylinder to be processed to make a circular motion. The processing mechanism is controlled to make a linear motion along the radial direction of the gas cylinder to be processed, so that the diameter of the bottle mouth of the gas cylinder to be processed can be reduced to a preset target. The locking mechanism ensures the stability of the gas cylinder to be processed during the processing. The precise rotation control of the rotating mechanism and the radial movement control of the processing mechanism jointly ensure the stability and positioning accuracy of the shrinking process, thereby achieving precise shrinking of the bottle mouth to the preset target value, thereby improving the dimensional accuracy and surface quality of the LNG gas cylinder end cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of a LNG cylinder end cap shrinking device according to the present invention is shown;

[0018] Figure 2 A schematic cross-sectional structure diagram of the LNG cylinder end cap shrinking device according to the present invention is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Workbench;

[0021] 20. Locking mechanism;

[0022] 21. Cylinder;

[0023] 22. Support block; 221. Exhaust hole;

[0024] 23, first transmission assembly; 231, primary transmission member; 232, secondary transmission member; 233, tertiary transmission member;

[0025] 24. Elastic parts;

[0026] 30. Rotating mechanism;

[0027] 31. Support seat;

[0028] 32. Pad;

[0029] 33. Guide plate; 331. Limit pin;

[0030] 34. A first driving member;

[0031] 35. Second transmission assembly; 351. Driving gear; 352. Driven gear;

[0032] 40. Processing mechanism; 41. Second driving member; 42. Processing member;

[0033] 100. Gas cylinders to be processed. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, parts, components and / or combinations thereof.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art, and in the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same components, and thus their description will be omitted.

[0038] It should be noted that LNG (liquefied natural gas) cylinders are energy storage devices for LNG fuel vehicles. As a clean fuel, LNG is widely used in commercial vehicles such as trucks, buses and some passenger cars to replace traditional diesel and gasoline, reduce exhaust emissions and improve energy efficiency.

[0039] Combination Figure 1 and Figure 2 As shown, according to a specific embodiment of the present invention, a shrinking device for an end cover of an LNG cylinder is provided.

[0040] Specifically, Figure 1 , Figure 2 As shown, an LNG cylinder end cap shrinking device includes: a workbench 10; a locking mechanism 20, the locking mechanism 20 is arranged on the workbench 10, the locking mechanism 20 has a locking position for locking the gas cylinder 100 to be processed, and the locking mechanism 20 has an unlocking position for unlocking the gas cylinder 100 to be processed; a rotating mechanism 30, the rotating mechanism 30 is located below the workbench 10, and the rotating mechanism 30 is transmission-connected to the locking mechanism 20; a processing mechanism 40, the processing mechanism 40 is located on the workbench 10, the processing mechanism 40 is movably arranged along the radial direction of the gas cylinder 100 to be processed placed on the workbench 10, and the processing mechanism 40 is used to reduce the bottle mouth diameter of the gas cylinder 100 to be processed to a preset target value.

[0041] In this embodiment, by setting a locking mechanism 20, when the locking mechanism 20 is in a locked state, the rotating mechanism 30 is controlled to drive at least the locking mechanism 20 to be rotatably set to drive the gas cylinder 100 to be processed to make a circular motion, and the processing mechanism 40 is controlled to make a linear motion along the radial direction of the gas cylinder 100 to be processed, so that the diameter of the bottle mouth of the gas cylinder 100 to be processed can be reduced to a preset target. The locking mechanism 20 ensures the stability of the gas cylinder 100 to be processed during the processing. The precise rotation control of the rotating mechanism 30 and the radial movement control of the processing mechanism 40 jointly ensure the stability and positioning accuracy of the shrinking process, thereby achieving precise shrinking of the bottle mouth to the preset target value, thereby improving the dimensional accuracy and surface quality of the LNG gas cylinder end cap.

[0042] Furthermore, the locking mechanism 20 is arranged inside the gas cylinder 100 to be processed. When the locking mechanism 20 is in the locking position, the outer surface of the locking mechanism 20 contacts the inner surface of the gas cylinder 100 to be processed. When the locking mechanism 20 is in the unlocking position, the outer surface of the locking mechanism 20 is disengaged from the inner surface of the gas cylinder 100 to be processed.

[0043] Specifically, the locking mechanism 20 directly contacts the inner surface of the gas cylinder, which can more accurately position and fix the gas cylinder, avoiding displacement or rotation during the processing, thereby improving the accuracy and stability of the shrinking process. Since the locking mechanism is located inside the gas cylinder, its locking force directly acts on the inner wall of the gas cylinder, which can provide a stronger locking effect, ensure the stability of the gas cylinder during the processing, and reduce vibration and deformation during the processing. The internal locking design allows the locking mechanism to adapt to gas cylinders of different sizes and shapes. It only needs to adjust the size or shape of the locking mechanism, which improves the versatility and flexibility of the equipment.

[0044] Furthermore, a first through hole is provided on the workbench 10, and at least part of the rotating mechanism 30 is arranged through the first through hole. The rotating mechanism 30 has a hollow cavity, at least part of the locking mechanism 20 is located in the hollow cavity, and the bottom of another part of the locking mechanism 20 is connected to at least part of the rotating mechanism 30.

[0045] Specifically, the direct connection between the locking mechanism 20 and the rotating mechanism 30 enables the locking mechanism to rotate synchronously with the precise rotation of the rotating mechanism, which provides more stable positioning and rotation control for the necking process of the gas cylinder and improves the processing accuracy. By arranging part of the rotating mechanism 30 below the workbench 10 and part of the locking mechanism 20 in the hollow cavity of the rotating mechanism 30, this spatial layout design maximizes the use of the internal space of the equipment, making the entire device more compact and reducing the footprint. The direct connection between the locking mechanism 20 and the rotating mechanism 30, as well as the hollow cavity design of the rotating mechanism 30, provide a stable support for the locking mechanism and enhance the structural stability of the entire device, especially during high-speed rotation and radial processing, which can effectively reduce vibration and displacement and ensure the smooth progress of the processing process.

[0046] Furthermore, the locking mechanism 20 includes: a cylinder 21, which is arranged in a hollow cavity; a support block 22, which is arranged on at least part of the rotating mechanism 30, and a plurality of exhaust holes 221 are provided on the upper surface of the support block 22, and the support block 22 has a accommodating cavity; a first transmission assembly 23, at least part of the first transmission assembly 23 is located in the accommodating cavity, and another part of the first transmission assembly 23 is located outside the accommodating cavity, and at least part of the first transmission assembly 23 is connected to the cylinder 21; controlling the movement of the cylinder 21 can make at least part of the first transmission assembly 23 have a first state of radially expanding to a locking position, and a second state of radially contracting to an unlocking position.

[0047] Specifically, the movement of the cylinder 21 can accurately control the radial position change of the first transmission assembly 23, thereby achieving radial locking and unlocking. This design can ensure the stability of the gas cylinder to be processed in the locked state and the rapid release in the unlocked state, thereby improving the accuracy and efficiency of the processing process. The radial expansion and contraction design of the first transmission assembly 23 enables the locking mechanism 20 to adapt to gas cylinders of different diameters, thereby improving the versatility and processing flexibility of the equipment. The multiple exhaust holes 221 provided on the upper surface of the support block 22 can effectively discharge the gas inside the gas cylinder or the waste gas generated during the processing, thereby maintaining the air pressure inside the gas cylinder stable and improving processing safety.

[0048] Furthermore, the first transmission component 23 of the locking mechanism 20 includes: a primary transmission member 231, the primary transmission member 231 is arranged in the accommodating cavity, and the cylinder 21 is connected to the bottom of the primary transmission member 231; a secondary transmission member 232, the secondary transmission member 232 is arranged on at least part of the rotating mechanism 30, the secondary transmission member 232 is arranged at intervals along the circumference of the primary transmission member 231, and the secondary transmission member 232 is obliquely connected to the primary transmission member 231; a tertiary transmission member 233, the tertiary transmission member 233 is arranged along the circumference of the support block 22, and the secondary transmission member 232 is obliquely connected to the tertiary transmission member 233; controlling the cylinder 21 to extend can make the primary transmission member 231 move upward, drive the secondary transmission member 232 to make a circular motion, and then drive the tertiary transmission member 233 to expand radially to the locking position.

[0049] Specifically, the vertical movement of the first-stage transmission member 231 is controlled by the cylinder 21, thereby driving the second-stage transmission member 232 to perform circular movement. Finally, the radial expansion and contraction of the third-stage transmission member along the support block 22 is achieved through the inclined connection between the second-stage transmission member 232 and the third-stage transmission member 233. This design can achieve precise control of the locking of the gas cylinder, ensuring the stability of the gas cylinder during processing and the uniform distribution of the locking force. The design of the multi-stage transmission structure enables the first transmission component to be compactly arranged in the accommodating cavity of the support block 22, reducing the overall volume of the equipment and optimizing the space utilization efficiency. It is particularly suitable for equipment on the production line, saving floor space and improving the layout flexibility of the production line. Since the third-stage transmission member 233 is arranged circumferentially along the support block 22, the locking range can be flexibly adjusted to adapt to the processing of gas cylinders of different diameters, thereby improving the versatility of the equipment and the adaptability of the processed parts.

[0050] Furthermore, the locking mechanism 20 comprises an elastic member 24, and the elastic member 24 is arranged along the inner ring of the three-stage transmission member 233. The elastic member 24 is annular.

[0051] Specifically, when the locking mechanism 20 is in the unlocked state, the elastic member 24 can provide a reset force to automatically retract the three-stage transmission member 233 radially back to the initial position. When the force of the cylinder 21 is removed, the preload force of the elastic member will ensure that the locking mechanism is quickly reset and ready for the next processing cycle. During the locking or unlocking process, the elastic member can absorb part of the impact force, play a shock absorbing and buffering role, reduce the vibration of the mechanical equipment, protect the equipment from severe impact, and extend the service life of the equipment. The elastic member can make the unlocking action of the locking mechanism faster. When the cylinder 21 retracts, the elastic force of the elastic member quickly pulls back the three-stage transmission member 233, reducing waiting time and improving processing efficiency.

[0052] In this embodiment, the elastic member 24 is a return spring. In other embodiments, the type of the elastic member is not limited thereto.

[0053] Furthermore, the rotating mechanism 30 includes: a support seat 31, which is arranged on the workbench 10, and the support seat 31 is located at the first through hole, and the support seat 31 has a second through hole; a pad 32, the pad 32 is located on the support seat 31, and the pad 32 has a third through hole; a guide plate 33, the guide plate 33 is located on the pad 32, a limit pin 331 is provided on the guide plate 33, the guide plate 33 has a fourth through hole, and at least part of the locking mechanism 20 is provided on the guide plate 33, and the first through hole, the second through hole, the third through hole, and the fourth through hole are connected The first driving member 34 is arranged to form a hollow cavity; the first driving member 34 is arranged on the workbench 10; the second transmission assembly 35, one end of the second transmission assembly 35 is transmission-connected to the first driving member 34, and the other end of the second transmission assembly 35 is connected to the bottom of the pad 32; the first driving member 34 is controlled to rotate, and the second transmission assembly 35 is driven to rotate, so as to drive the pad 32 and the guide plate 33 to make a circular motion, so that at least part of the locking mechanism 20 can make a circular motion, thereby driving the gas cylinder 100 to be processed to make a circular motion.

[0054] Specifically, the rotation of the first driving member 34 is transmitted to the pad 32 through the second transmission assembly 35, and then affects the guide plate 33, ensuring the precise rotation of the gas cylinder 100 to be processed during the necking process. This control mechanism can achieve high-precision circular motion and improve the uniformity and precision of the necking process. The connection design of the first through hole, the second through hole, the third through hole and the fourth through hole forms a hollow cavity, which not only provides an installation space for the locking mechanism 20, but also optimizes the structural layout of the rotating mechanism, making the entire device more compact and saving the floor space of the equipment. A part of the locking mechanism 20 is arranged on the guide plate 33, and this part of the locking mechanism 20 rotates with the circular motion of the guide plate 33, realizing the synchronization of locking and rotation, improving the processing efficiency, and ensuring the stability of the gas cylinder during the rotation process. The arrangement of the pad 32 and the guide plate 33 can reduce the direct contact between the locking mechanism 20 and the inner wall of the gas cylinder, reduce the rotation resistance, make the movement of the gas cylinder during the rotation process smoother, and reduce energy consumption.

[0055] Furthermore, the second transmission assembly 35 includes: a driving gear 351, which is transmission-connected to the first driving member 34; a driven gear 352, which is meshed with the driving gear 351, and the gear center of the driven gear 352 is connected to the third through hole, and the end plane of the driven gear 352 is connected to the bottom surface of the pad 32.

[0056] Specifically, the gear transmission structure can achieve efficient power transmission. The direct connection between the driving gear 351 and the first driving member 34 (such as a motor), and the meshing with the driven gear 352, enable the rotating mechanism 30 to obtain stable and efficient power input, ensuring the precise rotation of the gas cylinder.

[0057] Furthermore, the processing mechanism 40 includes: a second driving member 41, which is arranged on the workbench 10; a processing member 42, which is electrically connected to the second driving member 41, and the second driving member 41 is used to drive the processing member 42 to perform linear motion along the radial direction of the gas cylinder 100 to be processed.

[0058] Specifically, the processing part 42 is controlled to contact the gas cylinder 100 to be processed, and the processing part 42 makes a linear motion along the radial direction of the gas cylinder 100 to be processed until the processing part 42 moves to a set displacement, so that the processing part 42 squeezes the bottle mouth position of the gas cylinder 100 to be processed during the movement, so that the outer diameter at the bottle mouth of the gas cylinder 100 to be processed meets the preset target value.

[0059] In this embodiment, the workpiece 42 is a forming insert, which is widely used in stamping, forging, injection molding, compression molding and other processes of metal or non-metal materials.

[0060] According to another aspect of the present invention, a method for shrinking the end cap of an LNG gas cylinder is provided. The method is performed using the shrinking device for the end cap of an LNG gas cylinder according to the above embodiment of the claim. The shrinking device for the end cap of an LNG gas cylinder comprises: a workbench 10; a locking mechanism 20, the locking mechanism 20 is arranged on the workbench 10, the locking mechanism 20 has a locking position for locking the gas cylinder 100 to be processed, and the locking mechanism 20 has an unlocking position for unlocking the gas cylinder 100 to be processed; a rotating mechanism 30, the rotating mechanism 30 is located below the workbench 10, and the rotating mechanism 30 is transmission-connected to the locking mechanism 20; a processing mechanism 40, the processing mechanism 40 is located on the workbench 10, the processing mechanism 40 is movably arranged along the radial direction of the gas cylinder 100 to be processed placed on the workbench 10, and the processing mechanism 40 is used to reduce the diameter of the mouth of the gas cylinder 100 to be processed to a preset target value. The method for shrinking the end cap of an LNG gas cylinder comprises:

[0061] Step S11 , placing the gas cylinder 100 to be processed on the support block 22 , with the inner surface of the gas cylinder 100 to be processed being placed in contact with the upper surface of the support block 22 .

[0062] Step S12, controlling the locking mechanism 20 to lock the gas cylinder 100 to be processed.

[0063] The above steps are specifically as follows: the cylinder 21 is pushed out, during which the cylinder 21 drives the first-stage transmission member 231 to move upward, the first-stage transmission member 231 drives the second-stage transmission member 232 to move around, and the second-stage transmission member 232 simultaneously drives the third-stage transmission member 233 to move around, until the upper surface profiles of the first-stage transmission member 231 and the third-stage transmission member 233 are completely in contact with the inner surface profiles of the gas cylinder 100 to be processed, and the gas cylinder 100 to be processed is fixed and does not move.

[0064] Step S13, controlling the rotating mechanism 30 to rotate, driving the gas cylinder 100 to be processed in a locked state to perform a circular motion.

[0065] The above steps are specifically as follows: open the first driving member 34, so that the first driving member 34 drives the driving gear 351 to rotate together, the driving gear 351 drives the driven gear 352 to rotate, the driven gear 352 drives the pad 32 to rotate, the pad 32 drives the guide plate 33 to rotate, the guide plate 33 drives the secondary transmission member 232, the tertiary transmission member 233, the support block 22 and the gas cylinder 100 to be processed to rotate together.

[0066] Step S14, controlling the processing part 42 of the processing mechanism 40 to contact with the gas cylinder 100 to be processed, and the processing part 42 to make a linear motion along the radial direction of the gas cylinder 100 to be processed until the processing part 42 moves to a set displacement, so that the processing part 42 squeezes the bottle mouth position of the gas cylinder 100 to be processed during the movement, so that the outer diameter at the bottle mouth of the gas cylinder 100 to be processed meets the preset target value.

[0067] Furthermore, the method for shrinking the end cap of the LNG cylinder also includes:

[0068] Step S15, when it is determined that the outer diameter of the bottle mouth of the gas cylinder 100 to be processed meets the preset target value, the processing part 42 is controlled to retract, the rotating mechanism 30 is controlled to work, and the locking mechanism 20 is controlled to unlock the shrunken gas cylinder and remove the shrunken gas cylinder.

[0069] Furthermore, after the cylinder 21 is pushed out, the tertiary transmission member 233 will cause the elastic member 24 to be in a stretched state during the expansion process. After the cylinder 21 is retracted, the contraction of the elastic member 24 will drive the secondary transmission member 232 and the tertiary transmission member 233 to contract inwardly, so that the gas cylinder 100 to be processed can be removed.

[0070] Furthermore, during the outward expansion of the tertiary transmission member 233 , the limit pin 331 can limit the outward expansion degree of the tertiary transmission member 233 to not exceed the gas cylinder 100 to be processed.

[0071] Furthermore, after the first driving member 34 completes one shrinking operation in the forward rotation, it performs shrinking operation in the next reverse rotation to ensure that the air pipe of the packaging cylinder has a sufficient length.

[0072] Furthermore, the feed amount of the workpiece 42 is 0.1-0.4 mm for each rotation of the gas cylinder 100 to be processed.

[0073] The LNG cylinder end cap shrinking method is simple and can effectively improve the product precision, surface quality and production stability of the LNG cylinder end cap. It is an effective solution to the poor shrinking quality of the commercial vehicle LNG cylinder end cap.

[0074] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a component or feature and other components or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the components in use or operation in addition to the orientations described in the figures. For example, if the components in the drawings are inverted, the components described as "above other components or structures" or "above other components or structures" will be positioned as "below other components or structures" or "below other components or structures". Thus, the exemplary term "above" may include both "above" and "below". The component may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein are interpreted accordingly.

[0075] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0076] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A LNG gas cylinder end cap shrinking device, characterized in that: include: Workbench (10); A locking mechanism (20), the locking mechanism (20) being arranged on the workbench (10), the locking mechanism (20) having a locking position for locking the gas cylinder (100) to be processed, and the locking mechanism (20) having an unlocking position for unlocking the gas cylinder (100) to be processed; A rotating mechanism (30), the rotating mechanism (30) being located below the workbench (10), and the rotating mechanism (30) being transmission-connected to the locking mechanism (20); A processing mechanism (40), the processing mechanism (40) is located on the workbench (10), the processing mechanism (40) is movably arranged along the radial direction of the gas cylinder (100) to be processed placed on the workbench (10), and the processing mechanism (40) is used to reduce the diameter of the bottle mouth of the gas cylinder (100) to be processed to a preset target value.

2. The LNG cylinder end cap shrinking device according to claim 1, characterized in that: The locking mechanism (20) is arranged inside the gas cylinder (100) to be processed. When the locking mechanism (20) is located at the locking position, the outer surface of the locking mechanism (20) contacts the inner surface of the gas cylinder (100) to be processed. When the locking mechanism (20) is located at the unlocking position, the outer surface of the locking mechanism (20) is disengaged from the inner surface of the gas cylinder (100) to be processed.

3. The LNG cylinder end cap shrinking device according to claim 2, characterized in that: The workbench (10) is provided with a first through hole, and at least part of the rotating mechanism (30) is arranged through the first through hole. The rotating mechanism (30) has a hollow cavity, and at least part of the locking mechanism (20) is located in the hollow cavity. The bottom of another part of the locking mechanism (20) is connected to at least part of the rotating mechanism (30).

4. The LNG cylinder end cap shrinking device according to claim 3, characterized in that: The locking mechanism (20) comprises: A cylinder (21), wherein the cylinder (21) is disposed in the hollow cavity; A support block (22), the support block (22) being arranged on at least a portion of the rotating mechanism (30), a plurality of exhaust holes (221) being arranged on an upper surface of the support block (22), and the support block (22) having a receiving cavity; a first transmission assembly (23), wherein at least a portion of the first transmission assembly (23) is located in the accommodating cavity, and another portion of the first transmission assembly (23) is located outside the accommodating cavity, and at least a portion of the first transmission assembly (23) is connected to the cylinder (21); By controlling the movement of the cylinder (21), at least part of the first transmission assembly (23) can have a first state of radially expanding to the locking position, and a second state of radially contracting to the unlocking position.

5. The LNG cylinder end cap shrinking device according to claim 4, characterized in that: The first transmission assembly (23) of the locking mechanism (20) comprises: A primary transmission member (231), the primary transmission member (231) being disposed in the accommodating cavity, the cylinder (21) being connected to the bottom of the primary transmission member (231); a secondary transmission member (232), the secondary transmission member (232) being arranged on at least a portion of the rotating mechanism (30), the secondary transmission member (232) being arranged at intervals along the circumference of the primary transmission member (231), and the secondary transmission member (232) being obliquely connected to the primary transmission member (231); A three-stage transmission member (233), wherein the three-stage transmission member (233) is arranged along the circumference of the support block (22), and the two-stage transmission member (232) is obliquely connected to the three-stage transmission member (233); By controlling the cylinder (21) to extend, the primary transmission member (231) can be moved upward, driving the secondary transmission member (232) to move in a circular motion, thereby driving the tertiary transmission member (233) to expand radially to the locking position.

6. The LNG cylinder end cap shrinking device according to claim 5, characterized in that: The locking mechanism (20) comprises: An elastic member (24), wherein the elastic member (24) is arranged along the inner ring of the third-stage transmission member (233).

7. The LNG cylinder end cap shrinking device according to claim 3, characterized in that: The rotating mechanism (30) comprises: A support seat (31), the support seat (31) being arranged on the workbench (10), the support seat (31) being located at the first through hole, and the support seat (31) having a second through hole; A pad (32), the pad (32) being located on the support seat (31), and the pad (32) having a third through hole; a guide plate (33), the guide plate (33) being located on the backing plate (32), the guide plate (33) being provided with a limit pin (331), the guide plate (33) having a fourth through hole, the guide plate (33) being provided with at least part of the locking mechanism (20), the first through hole, the second through hole, the third through hole, and the fourth through hole being arranged in communication to form the hollow cavity; A first driving member (34), wherein the first driving member (34) is disposed on the workbench (10); a second transmission assembly (35), one end of the second transmission assembly (35) being transmission-connected to the first driving member (34), and the other end of the second transmission assembly (35) being connected to the bottom of the pad (32); The first driving member (34) is controlled to rotate, driving the second transmission assembly (35) to rotate, thereby driving the backing plate (32) and the guide plate (33) to perform circular motion, so that at least part of the locking mechanism (20) can perform circular motion, thereby driving the gas cylinder (100) to be processed to perform circular motion.

8. The LNG cylinder end cap shrinking device according to claim 7, characterized in that: The second transmission assembly (35) comprises: A driving gear (351), the driving gear (351) being drivingly connected to the first driving member (34); A driven gear (352), the driven gear (352) meshes with the driving gear (351), the gear center of the driven gear (352) is arranged to be connected to the third through hole, and the end plane of the driven gear (352) is connected to the bottom surface of the pad (32).

9. The LNG cylinder end cap shrinking device according to claim 1, characterized in that: The processing mechanism (40) comprises: A second driving member (41), wherein the second driving member (41) is disposed on the workbench (10); A processing piece (42), wherein the processing piece (42) is electrically connected to the second driving piece (41), and the second driving piece (41) is used to drive the processing piece (42) to perform linear motion along the radial direction of the gas cylinder (100) to be processed.

10. A method for shrinking the end cap of an LNG cylinder, characterized in that: The method is carried out using the LNG cylinder end cap shrinking device according to any one of claims 1 to 9, and the method comprises: The gas cylinder (100) to be processed is arranged on a support block (22), wherein the inner surface of the gas cylinder (100) to be processed is placed in contact with the upper surface of the support block (22); Controlling the locking mechanism (20) to lock the gas cylinder (100) to be processed; Controlling the rotating mechanism (30) to rotate, thereby driving the gas cylinder (100) to be processed in a locked state to perform circular motion; The processing piece (42) of the processing mechanism (40) is controlled to contact the gas cylinder (100) to be processed, and the processing piece (42) performs linear motion along the radial direction of the gas cylinder (100) to be processed until the processing piece (42) moves to a set displacement, so that the processing piece (42) squeezes the mouth of the gas cylinder (100) to be processed during the movement, so that the outer diameter of the mouth of the gas cylinder (100) to be processed meets the preset target value.

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