Welding auxiliary tool

Abstract

The utility model provides an auxiliary welding tool which is used for assisting welding between a shaft sleeve and a rear supporting end socket in a liquid hydrogen bottle and comprises a support body, and a limiting portion and a shaft sleeve positioning portion are arranged on the support body. The limiting part is used for restraining the rear supporting end socket on the tool support, and the shaft sleeve positioning part is used for positioning the shaft sleeve at a preset position in a through hole in the rear supporting end socket. According to the auxiliary welding tool, the rear supporting end socket can be well kept on the support main body through the limiting part arranged on the support main body, the shaft sleeve is positioned through the shaft sleeve positioning part arranged on the support main body, and therefore the relative position of the shaft sleeve on the rear supporting end socket can be guaranteed, welding errors can be reduced, and the welding quality is improved. The welding quality of the shaft sleeve and the rear supporting end socket is improved, and the welding efficiency can also be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid hydrogen bottle manufacturing tooling, in particular to a welding auxiliary tooling. Background Art

[0002] Hydrogen is a globally recognized clean energy source. Currently, my country's on-board hydrogen storage systems offer both high-pressure gaseous storage and cryogenic liquid storage. Liquid hydrogen is a high-energy, low-temperature liquid fuel. Liquid hydrogen storage systems offer the advantages of both high energy density and high hydrogen storage density. This means that within a tank of the same volume, liquid hydrogen can store more hydrogen, significantly increasing the vehicle's range. Liquid hydrogen cylinders for vehicles are a key component of this technology.

[0003] During the manufacturing process of on-board liquid hydrogen cylinders, a shaft sleeve needs to be welded to the rear end of the rear support head, which is located between the inner and outer rear heads. To ensure the accuracy and quality of the welding position of the shaft sleeve on the rear support head, it is urgent to design and develop a welding auxiliary tooling. Utility Model Content

[0004] In view of this, the present invention aims to provide a welding auxiliary tooling to reduce welding errors, improve welding quality, and also increase welding efficiency.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A welding auxiliary tool for assisting the welding between a shaft sleeve and a rear support head in a liquid hydrogen bottle, the welding auxiliary tool comprising a bracket body provided with a limiting portion and a shaft sleeve positioning portion;

[0007] The limiting portion is used to constrain the rear support head on the bracket body, and the sleeve positioning portion is used to position the sleeve at a preset position in the through hole on the rear support head.

[0008] Furthermore, the sleeve positioning portion includes a positioning shaft provided on the bracket body; the positioning shaft can be inserted into the inner hole of the sleeve, and the positioning shaft is provided with a positioning end surface for positioning the sleeve in the axial direction of the sleeve.

[0009] Furthermore, the positioning shaft is a hollow shaft.

[0010] Furthermore, the limiting portion includes a limiting piece provided on the bracket body; the limiting piece is a plurality of the limiting pieces arranged at intervals along the circumference of the rear support head, and each of the limiting pieces can be pressed against the open end of the rear support head.

[0011] Furthermore, the position of each of the limiting members on the bracket body is adjustable.

[0012] Furthermore, each of the limiting members can be slidably disposed on the bracket body, and a locking member is provided between each of the limiting members and the bracket body, and the locking member is used to lock the corresponding limiting member at different positions on the bracket body.

[0013] Furthermore, the bracket body includes a shaft body and a plurality of support arms connected to the shaft body in a circumferential direction; the shaft body is provided with the sleeve positioning portion, and each of the support arms is provided with the limiting portion.

[0014] Furthermore, the plurality of arms are arranged in a cross shape with the shaft as the center.

[0015] Furthermore, each of the support arms is in the shape of a Chinese character "J", and has a main body connected to the shaft body, and supporting feet connected to the main body through an inclined connecting section; one side of each supporting foot is used to support the open end of the rear support head, and the limiting portion is provided on the supporting foot.

[0016] Furthermore, relative to the side used to support the open end, the other side of each supporting leg is located on the same plane.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The welding auxiliary tooling described in the present invention can better limit the rear support head through the limiting part arranged on the bracket body, so that the rear support head can be better maintained on the bracket body, and the shaft sleeve positioning part arranged on the bracket body can be used to realize the positioning of the shaft sleeve, and ensure the relative position of the shaft sleeve on the rear support head, thereby reducing the welding error between the shaft sleeve and the rear support head, improving the welding quality of the shaft sleeve and the rear support head, and also improving the welding efficiency, and has a very good use effect.

[0019] Furthermore, the sleeve positioning portion utilizes a positioning shaft with a positioning end surface. This structure is simple and easy to design and manufacture. Furthermore, the positioning shaft can be inserted into the inner hole of the sleeve. The positioning end surface on the positioning shaft effectively positions the sleeve in both its center and axial direction, thereby ensuring its relative position to the rear support head. The hollow positioning shaft facilitates weight reduction in the sleeve positioning portion and the welding auxiliary tooling.

[0020] Secondly, the limiting part adopts limiting members arranged on the bracket main body, and multiple limiting members are arranged at intervals along the circumferential direction of the rear support head. The multiple limiting members can tightly abut against the open end of the rear support head. This structure is simple and is conducive to improving the stability of limiting the rear support head. The positions of the limiting members arranged on the bracket main body are all adjustable, so that better limiting of rear support heads of different sizes can be achieved, which is conducive to improving the versatility of the welding auxiliary tooling.

[0021] Furthermore, each limiting member is slidably mated with the bracket main body, and by using the arranged locking member, when each limiting member slides to the required position on the bracket main body, the corresponding limiting member can be locked on the bracket main body through the locking member. In this way, it is conducive to the position adjustment of the limiting member relative to the bracket main body and also conducive to the fixation of the limiting member relative to the bracket main body, and can better match rear support heads of different sizes to achieve the limiting of rear support heads of different sizes. The bracket main body includes a shaft body and multiple support arms, and a shaft sleeve positioning part is arranged on the shaft body, and a limiting part is arranged on each support arm. Its structure is simple, convenient for design and implementation, and is also conducive to the lightweight design of the bracket main body.

[0022] In addition, multiple support arms are arranged in a cross shape centered on the shaft body. In this way, when the rear support head is installed on the welding auxiliary tooling, the stability of bearing the rear support head can be improved, and further the limiting effect of the rear support head can be improved. Each support arm is in a "J" shape, its structure is simple, convenient for processing and preparation, and by using the support arm with a "J" shape structure, it is also conducive to improving the structural strength and structural stability of the tooling bracket. Relative to the side for supporting the open end, the other sides of each support foot are located on the same plane. Thus, the bracket main body can be supported at multiple points through multiple support feet, which is conducive to improving the stability of the bracket main body. Brief Description of the Drawings

[0023] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0024] Figure 1 is a schematic structural diagram of the welding auxiliary tooling according to the embodiment of the present invention from the first perspective;

[0025] Figure 2 is a schematic structural diagram of the welding auxiliary tooling according to the embodiment of the present invention from the second perspective;

[0026] Figure 3 is a schematic structural diagram of the welding auxiliary tooling according to the embodiment of the present invention from the third perspective;

[0027] Figure 4This is a structural diagram of the position limiting member according to an embodiment of the present utility model;

[0028] Figure 5 This is a structural schematic diagram of the welding auxiliary tooling according to an embodiment of the present utility model in an application state from a first perspective;

[0029] Figure 6 This is a structural schematic diagram of the welding auxiliary tooling according to an embodiment of the present invention in an application state from a second perspective;

[0030] Figure 7 This is a structural schematic diagram of the welding auxiliary tooling according to an embodiment of the present utility model in an application state from a third perspective;

[0031] Description of reference numerals:

[0032] 1. Bracket body; 2. Positioning shaft; 3. Limiting piece; 4. Locking piece; 5. Rear support head; 6. Bushing; 10. Positioning end face; 11. Shaft body; 12. Support arm; 121. Main body; 122. Connecting section; 123. Support foot; 31. Sliding part; 32. Limiting plate; 33. Nut; 310. Slide groove; 51. Open end. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0034] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," and "outer" appear to indicate orientation or positional relationships, these are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, if terms such as "first" and "second" appear, they are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0035] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connection," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] Liquid hydrogen cylinders typically utilize a double-layer structure consisting of an outer cylinder and an inner cylinder, with a vacuum layer formed between them. The outer cylinder comprises an outer cylinder body, and an outer front and rear heads connected at both ends of the outer cylinder body. The inner cylinder comprises an inner cylinder body, and an inner front and rear heads connected at both ends of the inner cylinder body. A rear support head is located between the inner and outer rear heads, and a shaft sleeve is welded to the rear end of the rear support head, that is, the end away from the inner cylinder body.

[0038] Therefore, in order to ensure the accuracy of the welding position and welding quality of the shaft sleeve 6 on the rear support head 5, this embodiment proposes a welding auxiliary tool for welding between the shaft sleeve 6 and the rear support head 5 in the liquid hydrogen bottle.

[0039] In terms of overall structure, Figures 1 to 3 As shown, the welding auxiliary tooling of this embodiment includes a bracket body 1, which is provided with a limiter and a sleeve positioning portion. The limiter is used to constrain the rear support head 5 on the bracket body 1, and the sleeve positioning portion is used to position the sleeve 6 at a preset position in the through hole of the rear support head 5.

[0040] In the above structure, the rear support head 5 can be better limited by the limiting portion provided on the bracket main body 1, so that the rear support head 5 can be better maintained on the bracket main body 1, and the shaft sleeve positioning portion provided on the bracket main body 1 can be used to achieve the positioning of the shaft sleeve 6. At this time, under the cooperation of the limiting portion and the shaft sleeve positioning portion, the relative position of the shaft sleeve 6 on the rear support head 5 can be guaranteed, thereby reducing the welding error between the shaft sleeve 6 and the rear support head 5, improving the welding quality of the shaft sleeve 6 and the rear support head 5, and also improving the welding efficiency.

[0041] For details, see Figures 1 to 3 As shown, as a preferred embodiment, in this embodiment, the bracket body 1 includes a shaft body 11 and a plurality of support arms 12 connected to the shaft body 11 in the circumferential direction. A sleeve positioning portion is provided on the shaft body 11, and a limit portion is provided on each support arm 12. In this case, the bracket body 1 adopts a structure of a shaft body 11 and a plurality of support arms 12, and the sleeve positioning portion is arranged on the shaft sleeve 6, and the limit portion is arranged on the support arm 12. This makes the structure of the bracket body 1 relatively simple, easy to process and prepare, and also conducive to the lightweight design of the bracket body 1.

[0042] The sleeve positioning portion of this embodiment, as a preferred implementation, includes a positioning shaft 2 provided on the bracket body 1, which can be inserted into the inner hole of the sleeve 6, and the positioning shaft 2 is provided with a positioning end face 10 for positioning the sleeve 6 in the axial direction of the sleeve 6.

[0043] In terms of specific structure, as a feasible embodiment, the shaft body 11 of the bracket main body 1 has a through hole extending through both ends thereof. The inner diameter of the through hole is consistent with the outer diameter of the positioning shaft 2. One end of the positioning shaft 2 is fixed in the through hole, and the other end of the positioning shaft 2 is used for the sleeve 6 to pass through to position the sleeve 6. Because the positioning shaft 2 is fixed in the through hole on the shaft body 11, the positioning shaft 2 and the shaft body 11 form a stepped shaft structure, that is, having a large diameter section and a small diameter section. At this time, the connecting end surface between the large diameter section and the small diameter section constitutes the positioning end surface 10 for axially positioning the sleeve 6.

[0044] It should be noted that the positioning end surface 10 can also be directly formed on the positioning shaft 2. For example, a boss protruding radially outward along the positioning shaft 2 is formed at one end of the positioning shaft 2. When the sleeve 6 is positioned, that is, when the positioning shaft 2 is inserted into the inner hole of the sleeve 6, the end surface of the boss is used to position the sleeve 6. This end surface constitutes the positioning end surface 10. The positioning shaft 2 can also be fixed to the shaft body 11 via the boss to achieve the arrangement of the positioning shaft 2 on the shaft body 11.

[0045] In addition, it should be noted that, in addition to the above-mentioned split-type structure, the shaft body 11 and the positioning shaft 2 may also be of an integral structure. For example, a shaft having a diameter larger than the inner diameter of the sleeve 6 may be used, and a small shaft may be machined at one end of the shaft so that the diameter of the small shaft is consistent with the inner diameter of the sleeve 6, and the connecting end surface between the small shaft and the shaft having the larger diameter forms the positioning end surface 10. This design is also possible.

[0046] In addition, it should be noted that the gap between the positioning shaft 2 and the inner hole of the sleeve 6 is preferably between 0.1mm and 0.5mm. On the one hand, this can ensure the positioning accuracy of the sleeve 6, and on the other hand, it can facilitate the installation of the sleeve 6 on the positioning shaft 2. At the same time, after the sleeve 6 and the rear support head 5 are welded, it can facilitate the removal of the positioning shaft 2, and thus facilitate the disassembly and assembly of the welding auxiliary tooling. In a specific implementation, the gap between the positioning shaft 2 and the inner hole of the sleeve 6 is set to 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm, for example.

[0047] In this embodiment, the positioning shaft 2 and the positioning end face 10 are provided, so that the positioning shaft 2 is plugged into and matched with the inner hole of the sleeve 6, and the center position of the sleeve 6 can be positioned. In addition, the positioning end face 10 on the positioning shaft 2 can be used to support the end of the sleeve 6 on the one hand, and to position the sleeve 6 in its own axial direction on the other hand, so that the sleeve 6 can be maintained at a preset position in the through hole on the rear support head 5, thereby ensuring the relative position of the sleeve 6 on the rear support head 5, thereby reducing welding errors and ensuring welding quality.

[0048] As a further preferred embodiment, in this embodiment, the positioning shaft 2 is a hollow shaft. This setting is conducive to the weight reduction design of the bushing positioning portion.

[0049] In this embodiment, as a preferred implementation form of the limiting portion, the limiting includes a limiting member 3 provided on the bracket main body 1. The limiting members 3 are multiple and arranged at intervals along the circumferential direction of the rear support head 5. Each limiting member 3 can abut against the open end 51 of the rear support head 5. At this time, by using the multiple limiting members 3 to abut against the open end 51 of the rear support head 5, it not only has a simple structure and is convenient for design and implementation, but also is beneficial to improving the stability of the limit on the rear support head 5.

[0050] Refer to Figures 1 to 3 as shown, and in combination with Figures 5 to 7 as shown, a plurality of arms 12 are arranged at intervals in the circumferential direction of the shaft body 11, and a limiting portion is provided on each arm 12. The arrangement of the arms 12 can provide a layout position for the limiting portion, and the structure of using a plurality of arms 12 also makes the overall structure of the bracket main body 1 relatively simple.

[0051] In this embodiment, as a feasible implementation manner, the plurality of arms 12 are arranged in a cross shape centered on the shaft body 11. In this way, when the rear support head 5 is installed on the welding auxiliary tooling, the stability of the load on the rear support head 5 can be improved, and the limiting effect on the rear support head 5 can be further improved.

[0052] On the basis that the plurality of arms 12 are arranged in a cross shape centered on the shaft body 11, in this embodiment, each arm 12 is in a "J" shape and has a main body portion 121 connected to the shaft body 11, and a support foot 123 connected to the main body portion 121 through an inclined connecting section 122. Among them, one side of each support foot 123 is used to support the open end 51 of the rear support head 5, and the limiting portion is provided on the support foot 123.

[0053] In this structure, each support arm is in a "J" shape, which not only has a simple structure and is convenient for processing and preparation, but also uses the support arm in the "J" shape structure, which is beneficial to improving the structural strength and structural stability of the tooling bracket, and is also beneficial to setting the axial dimension of the shaft body 11 smaller in the axial direction of the bushing 6, which is beneficial to the lightweight design of the bracket main body 1.

[0054] It should be noted that the plurality of arms 12 can be two, three, four, five or any number evenly distributed in the circumferential direction of the shaft body 11, and this embodiment does not limit this. In addition, in terms of structure, in addition to using the "J" shape structure, the arms 12 can also adopt a straight shape structure. Of course, it can be understood that in addition to being arranged in a cross shape, the plurality of arms 12 can also be arranged in a star shape or other shapes.

[0055] In this embodiment, each stopper 3 is specifically disposed on each support leg 123. Thus, when the support leg 123 supports the open end 51 of the rear support head 5, each stopper 3 is facilitated to be pressed against the end edge of the rear support head 5. In addition, as a preferred embodiment, in this embodiment, the position of each stopper 3 on the bracket body 1 is adjustable, specifically, the position of each stopper 3 on the corresponding support leg 123 is adjustable.

[0056] In some feasible embodiments, each limit member 3 can be slidably arranged on the bracket body 1, and a locking member 4 is provided between each limit member 3 and the bracket body 1. When the limit member 3 slides to the desired position, the locking member 4 is used to lock the corresponding limit member 3 on the bracket body 1.

[0057] In terms of specific structure, Figure 4 As shown, the stopper 3 includes a sliding portion 31 that slides on the support leg 123 and a stopper plate 32 fixed to the sliding portion 31. The sliding portion 31 is provided with a sliding groove 310 that slides in conjunction with the support leg 123. The cooperation between the support leg 123 and the sliding groove 310 enables the stopper 3 to slide along the support leg 123. Furthermore, when matching rear support heads 5 of different sizes, the stopper 3 can slide to different positions and be locked at the desired position on the support leg 123 using the locking member 4.

[0058] It is worth mentioning that the above-mentioned locking member 4 includes a bolt. In a specific implementation, a through hole is provided on the limit member 3, and a nut 33 is fixed to the limit member 3. The center hole of the nut 33 is coaxially arranged with the through hole. The bolt is screwed into the nut so that the screw rod of the bolt passes through the through hole and is tightened on the support foot 123, thereby realizing the fixation of the limit member 3 on the support foot 123.

[0059] In addition, it is also worth mentioning that in addition to adopting the above-mentioned structural form, the limit member 3 of this embodiment can also adopt a limit baffle screwed on the support foot 123. At this time, multiple fixing holes are arranged at intervals along the diameter direction of the open end 51 on the support foot 123. The limit baffle is screwed into different fixing holes by bolts, and the position adjustment of the limit member 3 on the bracket body 1 can also be achieved. This is also possible.

[0060] Furthermore, as a preferred embodiment, in this embodiment, the other side of each support leg 123 is located on the same plane as the side supporting the open end 51. This arrangement allows the bracket body 1 to be supported at multiple points by the multiple support legs 123, thereby improving the stability of the bracket body 1. In specific implementation, given that each support leg 123 is provided with a limiter 3, it is necessary to ensure that the bottom of each limiter 3 is located on the same plane to ensure the stability of the bracket body 1. In this case, the bottom of the limiter 3 also serves to support the bracket body 1.

[0061] When using the welding auxiliary tooling of this embodiment, first, the bracket body 1 is placed on a horizontal positioning platform, and the entire bracket body 1 is supported at multiple points by the stoppers 3 pre-installed on the support legs 123. Then, the rear support head 5 is placed on the bracket body 1, with the support legs 123 supporting the open end 51 of the rear support head 5. The positioning shaft 2 on the shaft body 11 corresponds to the through hole in the rear support head 5.

[0062] Next, adjust the position of the stopper 3 so that it presses against the open end 51 and locks the stopper 3 to the support foot 123 using the corresponding fasteners. Then, sleeve 6 is placed on the positioning shaft 2 to determine the relative position of sleeve 6 on the rear support head 5. Then, sleeve 6 can be welded to the through hole on the rear support head 5, completing the welding of sleeve 6 to the rear support head 5.

[0063] The welding auxiliary tooling of this embodiment can better constrain the rear support head 5, and can also position the shaft sleeve 6 to ensure the relative position of the shaft sleeve 6 on the rear support head 5, thereby reducing the welding error between the shaft sleeve 6 and the rear support head 5, improving the welding quality of the shaft sleeve 6 and the rear support head 5, and also improving the welding efficiency.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A welding auxiliary tooling for assisting in welding between a bushing (6) and a rear support head (5) in a liquid hydrogen cylinder, characterized in that: The welding auxiliary tooling includes a bracket main body (1), and a limiting part and a bushing positioning part are provided on the bracket main body (1); The limiting part is used to constrain the rear support head (5) on the bracket main body (1), and the bushing positioning part is used to position the bushing (6) at a preset position in a through hole on the rear support head (5).

2. The welding auxiliary tooling according to claim 1, characterized in that: The bushing positioning part includes a positioning shaft (2) provided on the bracket main body (1); The positioning shaft (2) can be inserted into the inner hole of the bushing (6), and a positioning end face (10) for positioning the bushing (6) in the axial direction of the bushing (6) is provided on the positioning shaft (2).

3. The welding auxiliary tooling according to claim 2, characterized in that: The positioning shaft (2) is a hollow shaft.

4. The welding auxiliary tooling according to claim 1, characterized in that: The limiting part includes a limiting member (3) provided on the bracket main body (1); The limiting members (3) are multiple and arranged at intervals along the circumferential direction of the rear support head (5), and each limiting member (3) can abut against the open end (51) of the rear support head (5).

5. The welding auxiliary tooling according to claim 4, characterized in that: The positions of each limiting member (3) on the bracket main body (1) are adjustable.

6. The welding auxiliary tooling according to claim 5, characterized in that: Each limiting member (3) is slidably provided on the bracket main body (1), and a locking member (4) is provided between each limiting member (3) and the bracket main body (1), and the locking member (4) is used to lock the corresponding limiting member (3) at different positions on the bracket main body (1).

7. The welding auxiliary tooling according to any one of claims 1 to 6, characterized in that: The bracket main body (1) includes a shaft body (11), and a plurality of support arms (12) connected in the circumferential direction of the shaft body (11); The shaft sleeve positioning part is provided on the shaft body (11), and the limiting part is provided on each support arm (12).

8. The welding auxiliary tooling according to claim 7, characterized in that: The plurality of support arms (12) are arranged in a cross shape centered on the shaft body (11).

9. The welding auxiliary tooling according to claim 7, characterized in that: Each support arm (12) is in a "J" shape, and each has a main body part (121) connected to the shaft body (11), and a support foot (123) connected to the main body part (121) through an inclined connecting section (122); One side of each support foot (123) is used to support the open end (51) of the rear support head (5), and the limiting part is provided on the support foot (123).

10. The welding auxiliary tooling according to claim 9, characterized in that: Relative to the side used to support the open end (51), the other side of each supporting foot (123) is located on the same plane.

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