Positioning fixture

Abstract

The application discloses a positioning tool, and belongs to the technical field of high-voltage switch devices.The positioning tool comprises a frame body, a limiting piece, a positioning piece, and a chute.The limiting piece is used for embedding and positioning a box body.The positioning piece is arranged on the frame body and used for making a stud contact the box body.An end of the positioning piece away from the frame body is provided with the chute, and the stud is located in the chute at least at a contact position with the box body, so that the assembling problem caused by the stud deflection or positioning error can be reduced, and the efficiency of a subsequent mounting process is improved.

Description

Technical Field

[0001] This application relates to the field of high voltage switchgear technology, and in particular to a positioning tool. Background Technology

[0002] In industrial production, the positioning accuracy of the bushing stud is crucial for the subsequent assembly of the insulating bushing. Only when the bushing stud is accurately positioned can the assembly of the insulating bushing be carried out smoothly, ensuring the stability of the switch's mechanical characteristics, thereby improving product quality and production efficiency.

[0003] In related technologies, the positioning of the bushing stud is prone to insufficient accuracy or large deviation, which often affects the installation efficiency of the subsequent insulating bushing. Utility Model Content

[0004] This application provides a positioning fixture that improves the positioning accuracy of sleeve studs, thereby at least partially solving the above-mentioned technical problems.

[0005] To achieve the above objectives, a positioning fixture is provided for positioning a stud on a housing, the positioning fixture comprising: The frame has a limiting member for embedding and positioning the box. A positioning element is provided on one side of the frame to make the stud contact the housing. The end of the positioning element away from the frame is provided with an inclined groove, and the stud is located at least in the inclined groove at the point of contact with the housing.

[0006] In some embodiments, the positioning member has a chamfered surface, the chamfered surface forming an acute angle with the central axis of the positioning member, and the chamfered surface forming the inclined groove. In some embodiments, the end of the limiting member used for insertion into the housing has a rounded corner.

[0007] In some embodiments, the number of limiting members is at least two.

[0008] In some embodiments, the limiting member is provided with a limiting part, which is used to abut against the box body when it is positioned and engaged with the box body, so as to limit the depth of the limiting member embedded in the box body. The length of the end of the limiting part away from the frame body is greater than or equal to the length of the end of the positioning member away from the frame body.

[0009] In some embodiments, the limiting portion protrudes from the outer wall of the limiting member.

[0010] In some embodiments, the inclined groove is disposed on the side of the positioning member opposite to the limiting member.

[0011] In some embodiments, the positioning member is provided with a limiting hole for positioning the stud, the limiting hole being configured to allow the stud to contact the housing when the stud is located in the limiting hole, and the inclined groove communicating with the limiting hole.

[0012] In some embodiments, the groove is configured such that at least a portion of the stud in contact with the housing is exposed in the groove when the stud contacts the housing.

[0013] In some embodiments, the positioning element is provided in two sets, and the inclined grooves on the two sets of positioning elements are arranged in opposite directions.

[0014] In some embodiments, the end of the positioning member facing away from the frame is provided with an abutment surface, which is configured to abut against the box when the frame and the box are positioned and engaged.

[0015] In some embodiments, the frame includes reinforcing ribs that extend along the length of the frame.

[0016] In some embodiments, the frame includes a handle.

[0017] In the positioning fixture of this application embodiment, the positioning component can pre-position the stud, ensuring that the stud is in a relatively stable position before being connected to the housing. When the operator connects the stud to the housing via the inclined slot, the stud maintains a preset spatial positional relationship under the constraint of pre-positioning, thereby improving the positioning accuracy between the stud and the housing. Therefore, after the stud and housing are connected, their relative positions maintain high stability, reducing assembly problems caused by stud misalignment or positioning errors, and thus helping to improve the efficiency of subsequent installation processes.

[0018] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0021] Figure 1 This is a schematic diagram of the overall structure of the positioning tooling provided in an exemplary embodiment of this disclosure; Figure 2 This is a front view of the positioning fixture provided in an exemplary embodiment of this disclosure; Figure 3 This is a side view of the positioning fixture provided in an exemplary embodiment of this disclosure; Figure 4 This is a cross-sectional view of the positioning fixture provided in an exemplary embodiment of this disclosure; Figure 5 This is a cross-sectional view of the positioning fixture provided in the exemplary embodiments of this disclosure when it is engaged with the housing; Figure 6 This is a schematic diagram of the structure of the positioning tool and the housing provided in the exemplary embodiment of this disclosure.

[0022] Explanation of reference numerals in the attached figures: 10. Housing; 11. Opening; 20. Stud; 100. Frame; 110. Limiting component; 111. Rounded corner; 112. Limiting part; 200. Positioning component; 210. Slanted groove; 220. Limiting hole; 230. Beveled surface; 240. Abutting surface; 300. Reinforcing rib; 400. Handle. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0024] Reference Figures 1 to 6 This disclosure provides a positioning fixture for positioning a stud 20 on a housing 10. As an example application, this positioning fixture can be used to install bushing studs on switches, improving the positioning accuracy between the bushing stud and the switch, making it less prone to misalignment or insufficient positioning accuracy during the fixing process. Therefore, the relative positional relationship between the bushing stud and the switch after connection is more stable, which helps ensure the mechanical characteristics of the high-voltage switch and also improves the efficiency of subsequent assembly of insulating bushings to a certain extent.

[0025] Reference Figure 1 and Figure 2The positioning fixture includes a frame 100 and a positioning element 200. The frame 100 provides a mounting base for the positioning element 200, meaning the positioning element 200 is fixed to the frame 100 to obtain stable support conditions. The frame 100 itself acts as a support structure, capable of cooperating with the housing 10 to position the frame 100 relative to the housing 10 in a defined position, thereby providing a reliable reference for the operation of the positioning element 200. Exemplarily, the housing 10 can be a component of a high-voltage switchgear, such as a switch body for mounting bushing studs.

[0026] In some embodiments, the frame 100 has a limiting member 110 for embedding and positioning the housing 10. The frame 100 and the housing 10 interact through the limiting member 110, allowing the frame 100 to be confined to a specific position on the housing 10. For example, the frame 100 may be provided with a positioning protrusion or a positioning post, and the housing 10 may be provided with a corresponding positioning groove or positioning hole. When the frame 100 is installed on the housing 10, the positioning groove or positioning hole engages with the positioning protrusion or positioning post, thereby defining the relative position of the frame 100 in the horizontal or vertical direction. Through this structural cooperation, the position of the frame 100 on the housing 10 is less prone to displacement, thus facilitating the formation of a stable positioning base for the frame 100 on the housing 10.

[0027] In this case, the positioning of the frame 100 relative to the housing 10 can be kept consistent across multiple different housings 10. That is, when the same frame 100 needs to be assembled into different housings 10, as long as these housings 10 have positioning structures that match the frame 100, the frame 100 can obtain the same relative position, thereby helping to achieve assembly accuracy.

[0028] The "frame 100" can be a frame structure used to support or fix functional components, or a load-bearing component with a certain strength and rigidity. The "box 10" can be understood as a component with installation function, such as the body, base plate, or bracket. Its specific form is not limited to one type but varies depending on the application environment. For example, in some applications, the box 10 can be a support base with a flat mounting surface, while in other applications, the box 10 can be a frame with a three-dimensional mounting structure.

[0029] Through the above design, the positioning and matching between the frame 100 and the box 10 not only facilitates the assembly operation, but also helps to maintain the stability of the frame 100 during use, thereby providing a reliable structural foundation for the subsequent functional realization.

[0030] In some embodiments, the positioning element 200 is connected to the frame 100, and the positioning element 200 is used to bring the stud 20 into contact with the housing 10. Here, the "positioning element 200" can be a structure integrally formed with the frame 100, or it can be a separate component connected to the frame 100 by welding, screws, snap-fits, or other means. The positioning element 200 may include limiting protrusions, insertion pins, guide grooves, or elastic snap-fits, etc., for engaging with the stud 20.

[0031] Once the frame 100 and housing 10 are positioned, the positioning element 200 is in a relatively stable position. At this point, the positioning element 200 can guide the stud 20, placing it in a predetermined position. For example, the positioning element 200 can form a recessed area for support or constraint. During assembly, the stud 20 can be placed within this recessed area, thus maintaining the stud 20 in a basically determined installation direction or position relative to the housing 10. This pre-positioning can reduce manual adjustments by operators to a certain extent and avoid assembly difficulties caused by excessive initial position deviation of the stud 20.

[0032] With this structural design, once the stud 20 is pre-positioned, it is easier to perform the final fastening or connection operation with the housing 10. For example, if the stud 20 is a screw, the positioning element 200 can guide the axis of the screw to be precisely positioned with the housing 10, thereby making the connection between the screw and the housing 10 more accurate after the screw is fixed to the housing 10.

[0033] It should be noted that the stud 20 can be a screw, bolt, pin, or other fastening element, and is not limited to any one form. The positioning element 200 serves to provide a relatively stable temporary positioning base for the stud 20, making the stud 20 more suitable for subsequent fastening operations and helping to reduce assembly errors caused by multiple adjustments.

[0034] In some embodiments, refer to Figure 1 and Figure 3 The positioning element 200 has a groove 210 at its end away from the frame 100, and the stud 20, at least at the point of contact with the housing 10, is located within the groove 210. By providing the groove 210, the connection between the stud 20 and the housing 10 can be operated without removing the positioning element 200. In other words, the groove 210 is equivalent to an operable area created on the positioning element 200, allowing the operator to directly process the joint between the stud 20 and the housing 10 while the stud 20 is in a pre-positioned state.

[0035] Through this design, the slanted groove 210 provides sufficient space for subsequent connection operations. For example, when the stud 20 and the housing 10 need to be welded, the slanted groove 210 allows the welding equipment to directly act on the joint between the stud 20 and the housing 10; when adhesive bonding is required, the slanted groove 210 can serve as a channel for injecting or dispensing adhesive, making it easier for the adhesive material to reach the target location; in the case of screwing or other fastening operations, the slanted groove 210 provides space for the tightening tool to enter, making it easier for the stud 20 to be finally joined to the housing 10.

[0036] Therefore, the design of the inclined groove 210 helps ensure that the stud 20 maintains precise pre-positioning while still providing convenient operating conditions, avoiding offset caused by disassembling the positioning component 200 or readjusting its position. This structure not only helps improve the smoothness of the assembly process but also maintains a high degree of consistency during batch assembly.

[0037] In some embodiments, refer to Figure 1 and Figure 5 The limiting member 110 is configured to engage with the opening 11 of the housing 10 to position the frame 100 within the housing 10. This creates a clear limiting relationship when the frame 100 is engaged with the housing 10, constraining the position of the frame 100 on the housing 10. The engagement of the limiting member 110 with the opening 11 not only provides horizontal positional limitation but also restricts the rotation or displacement of the frame 100 to a certain extent, ensuring the frame 100 remains more stably in its predetermined position.

[0038] In practical applications, the limiting member 110 can be a protruding column, pin, or other protruding structure, while the opening 11 of the housing 10 can be a through hole or slot adapted to its shape and size. For example, when the limiting member 110 is a cylindrical pin, its diameter is slightly smaller than the diameter of the opening 11 of the housing 10, so as to form a guiding relationship when inserted, thereby facilitating the rapid positioning of the frame 100; when the limiting member 110 is a square or irregular protrusion, it can further restrict the rotational freedom of the frame 100, making the relative position of the frame 100 and the housing 10 more accurate.

[0039] Through this structural design, the cooperation between the limiting member 110 and the opening 11 is beneficial to improving the positioning accuracy of the frame 100 relative to the box 10 to a certain extent, providing a stable reference for the subsequent positioning member 200 to pre-position the stud 20, thereby making the connection between the stud 20 and the box 10 more reliable.

[0040] In some embodiments, refer to Figure 1 and Figure 3The limiting member 110 has a rounded corner 111 at one end for insertion into the housing 10. This rounded corner 111 acts as a guide when the limiting member 110 contacts the housing 10, making it easier for the limiting member 110 to be smoothly inserted into the opening 11 of the housing 10, thus facilitating the operator's rapid initial positioning of the frame 100. Simultaneously, the rounded corner 111 reduces the sharpness of the contact between the limiting member 110 and the edge of the opening 11 of the housing 10, thereby reducing localized stress on the surface of the housing 10 during insertion and mitigating the risk of possible scratches or damage.

[0041] In some embodiments, refer to Figure 1 and Figure 6 The number of limiting elements 110 is at least two. Setting multiple limiting elements 110 enables multi-point positioning between the frame 100 and the housing 10, thereby providing more stable constraints on the frame 100 in both the horizontal and vertical directions. Through multi-point limiting, the position of the frame 100 on the housing 10 is less prone to rotation or displacement, which helps maintain the stable positioning of the frame 100 relative to the housing 10, thus providing a reliable reference for the pre-positioning of the positioning element 200 on the stud 20.

[0042] For example, when the limiting member 110 is set to two or more, the operator can achieve synchronous positioning through multiple contact points when installing the frame 100 onto the box 10. This is beneficial to maintain the consistency of the position of the frame 100 during the assembly process and to reduce tilting or slight deviation caused by single-point limiting.

[0043] In some embodiments, refer to Figure 3 and Figure 4 The limiting member 110 is provided with a limiting part 112, which is used to abut against the box 10 to limit the depth of the limiting member 110 inserted into the box 10. By setting the limiting part 112, the height position of the frame 100 relative to the box 10 can be limited, which helps to maintain the stable positioning of the frame 100 and avoids the frame 100 from shifting position due to the limiting member 110 being inserted too deeply during assembly.

[0044] In some embodiments, refer to Figure 3 and Figure 4 The distance from the end of the limiting part 112 away from the frame 100 is greater than or equal to the distance from the end of the positioning part 200 away from the frame 100. This design ensures that when the stud 20 is pre-positioned by the positioning part 200, the limiting part 110 will not interfere with the positioning part 200, while still effectively constraining the position of the frame 100. This structural arrangement helps to accurately control the position of the frame 100 on the housing 10 while maintaining the normal function of the positioning part 200, thus providing a reliable reference for the subsequent pre-positioning of the stud 20.

[0045] In some embodiments, refer to Figure 3 and Figure 4 The limiting part 112 protrudes from the outer wall of the limiting member 110. By setting the limiting part 112 as an outwardly protruding structure, when the limiting member 110 is inserted into the opening 11 of the housing 10, the protruding limiting part 112 can contact the surface of the housing 10, thereby forming a physical stop in the insertion depth and preventing the limiting member 110 from excessively entering the opening 11. This design is beneficial for maintaining the height position stability of the frame 100 during assembly, while avoiding interference between the limiting member 110 and the housing 10 or the positioning member 200.

[0046] Furthermore, the protruding limiting portion 112 can disperse local stress when it contacts the surface of the housing 10, thereby helping to reduce surface damage to the housing 10. In the case of repeated assembly, this design helps to maintain the consistency of the positioning of the frame 100 and provides a reliable reference for the pre-positioning of the positioning element 200 with the stud 20.

[0047] In some embodiments, refer to Figure 1 and Figure 3 The inclined groove 210 is provided on the side of the positioning member 200 opposite to the limiting member 110. With this arrangement, when the stud 20 has been pre-positioned in the housing 10 by the positioning member 200, the inclined groove 210 can provide sufficient space for external operation, so that the operator or equipment can directly act on the joint between the stud 20 and the housing 10.

[0048] For example, when welding is required, the slant groove 210 allows the welding tool to smoothly contact the mating surface between the stud 20 and the housing 10, thus facilitating welding. In adhesive bonding or other fastening operations, the slant groove 210 can also provide an operating channel for the glue injection, dispensing, or tightening tools.

[0049] In some embodiments, refer to Figure 1 and Figure 2 The positioning element 200 is provided with a limiting hole 220 for positioning the stud 20. The limiting hole 220 is configured to allow the stud 20 to contact the housing 10 when it is positioned within the limiting hole 220. The inclined groove 210 communicates with the limiting hole 220. Through the setting of the limiting hole 220, the stud 20 can maintain a stable position relative to the positioning element 200 during assembly, which helps to reduce displacement or deflection of the stud 20 in the initial assembly stage, thereby improving the positioning accuracy between the stud 20 and the housing 10. At the same time, the structural design of the limiting hole 220 allows the stud 20 to naturally contact the surface of the housing 10 when pre-positioned, which helps to provide a reliable reference for subsequent welding, bonding, or fastening operations.

[0050] In some embodiments, the groove 210 is configured to expose at least a portion of the stud 20 in contact with the housing 10 when the stud 20 contacts the housing 10. With this arrangement, when the stud 20 is already in the limiting hole 220 and in contact with the housing 10, the groove 210 provides a direct passage for external operation, allowing tools or materials to act on the contact portion between the stud 20 and the housing 10.

[0051] For example, when welding is required, the slant 210 allows the welding tool to directly contact the mating surface between the stud 20 and the housing 10; when performing adhesive bonding or fastening operations, the slant 210 provides space for the injection or tightening tool to enter, thereby facilitating the final connection between the stud 20 and the housing 10.

[0052] By aligning the inclined groove 210 with the contact portion of the stud 20, it is beneficial to ensure smooth connection operations while maintaining the pre-positioning of the stud 20, and to reduce interference with the frame 100 or the positioning element 200. This structural design, to a certain extent, helps to improve the accuracy and consistency of the connection between the stud 20 and the housing 10, and improves assembly efficiency.

[0053] In some embodiments, refer to Figure 1 and Figure 3 The positioning element 200 is provided with a beveled surface 230, and the angle between the beveled surface 230 and the central axis of the positioning element 200 is an acute angle. A groove (210) is formed at the beveled surface 230. Through the design of the beveled surface 230, the required operating space for the groove 210 can be provided while maintaining the overall structural strength of the positioning element 200, so that external tools can more easily access the contact area between the stud 20 and the housing 10.

[0054] Compared to direct drilling or other processing methods, the beveled surface 230 structure offers advantages in terms of ease of processing and cost, facilitating mass production and implementation. Simultaneously, the beveled surface 230 increases the exposed area of ​​the contact point between the stud 20 and the housing 10, which is beneficial for smooth welding, bonding, or fastening operations, thereby improving the connection accuracy and assembly consistency between the stud 20 and the housing 10.

[0055] In some embodiments, the positioning member 200 is provided in two sets, and the inclined grooves 210 on the two sets of positioning members 200 are arranged in opposite directions. With this arrangement, when the stud 20 is pre-positioned by the positioning member 200, regardless of which side of the frame 100 the operating space is located on, the contact part between the stud 20 and the housing 10 can be operated through the corresponding inclined groove 210, for example, by welding, bonding or fastening.

[0056] This structural design facilitates flexibility in assembly operations on multi-directional or complexly arranged housings 10, allowing operators or automated equipment to approach the studs 20 from different directions. This, to some extent, improves assembly efficiency and the precision of the connection between the studs 20 and the housing 10. Simultaneously, the two sets of inclined slots 210 provide ample operating space while ensuring the pre-positioning stability of the studs 20, reducing operational interference.

[0057] In some embodiments, refer to Figure 1 and Figure 4 The positioning member 200 has an abutment surface 240 at the end opposite to the frame 100. The abutment surface 240 is configured to abut against the housing 10 when the frame 100 and the housing 10 are in positioning engagement. By providing the abutment surface 240, a more stable support surface can be provided when the positioning member 200 contacts the housing 10, thereby helping to maintain the stable position of the positioning member 200 relative to the housing 10.

[0058] This structural design reduces the slight displacement that the positioning element 200 may experience during operation when the stud 20 is pre-positioned by the positioning element 200, ensuring that the stud 20 maintains a relatively precise position in the pre-positioned state. Simultaneously, the abutment surface 240 disperses the contact stress between the positioning element 200 and the housing 10, which helps maintain a stable fit between the frame 100 and the housing 10 during repeated assembly or long-term use, improving assembly accuracy and reliability.

[0059] In some embodiments, refer to Figure 1 and Figure 3 The frame 100 includes a reinforcing rib 300 that extends along the length of the frame 100. By providing a reinforcing rib 300 that extends along the length of the frame 100, the overall rigidity and structural stability of the frame 100 can be improved, which is beneficial for maintaining the stable positioning of the frame 100 relative to the box 10 during assembly.

[0060] This design reduces bending or deformation of the frame 100 when the stud 20 is pre-positioned by the positioning member 200, thus helping to maintain the consistent relative positional relationship between the limiting member 110, the positioning member 200, and the stud 20. At the same time, the reinforcing rib 300 helps maintain the durability of the frame 100 structure during repeated use or long-term operation, thereby improving overall assembly accuracy and operational reliability.

[0061] In some embodiments, the frame 100 includes a handle 400. The handle 400 can be used to facilitate the operator in gripping and moving the frame 100 during assembly or handling, thereby improving the convenience and flexibility of operation.

[0062] By providing a handle 400 on the frame 100, operators can more easily and accurately place the frame 100 onto the housing 10, which helps maintain a stable position between the frame 100 and the housing 10. It also facilitates the precise pre-positioning of the stud 20 via the positioning element 200. This design helps reduce operational errors, improves assembly efficiency, and provides a convenient operating experience during repeated use.

[0063] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0064] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0065] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0066] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A positioning fixture, characterized in that, The positioning fixture is used to position the stud (20) on the housing (10), and includes: The frame (100) has a limiting member (110) for embedding and positioning the box (10); A positioning element (200) is provided on one side of the frame (100) to make the stud (20) contact the housing (10). The end of the positioning element (200) away from the frame (100) is provided with a groove (210), and the stud (20) is located at least in the groove (210) at the point where it contacts the housing (10).

2. The positioning fixture according to claim 1, characterized in that, The positioning member (200) is provided with a chamfered surface (230), the angle between the chamfered surface (230) and the central axis of the positioning member (200) is an acute angle, and the chamfered groove (210) is formed at the chamfered surface (230).

3. The positioning fixture according to claim 1, characterized in that, The limiting member (110) has a rounded corner (111) at one end for embedding into the box (10).

4. The positioning fixture according to claim 1, characterized in that, The number of the limiting components (110) is at least two.

5. The positioning fixture according to claim 1, characterized in that, The limiting member (110) is provided with a limiting part (112), which is used to abut against the box (10) to limit the depth of the limiting member (110) embedded in the box (10). The length of the end of the limiting part (112) away from the frame (100) is greater than or equal to the length of the end of the positioning member (200) away from the frame (100).

6. The positioning fixture according to claim 5, characterized in that, The limiting part (112) protrudes from the outer wall of the limiting member (110).

7. The positioning fixture according to claim 1, characterized in that, The inclined groove (210) is disposed on the side of the positioning member (200) opposite to the limiting member (110).

8. The positioning fixture according to claim 1, characterized in that, The positioning member (200) is provided with a limiting hole (220) for positioning the stud (20). The limiting hole (220) is configured such that when the stud (20) is located in the limiting hole (220), the stud (20) contacts the housing (10). The inclined groove (210) communicates with the limiting hole (220).

9. The positioning fixture according to claim 8, characterized in that, The groove (210) is configured such that when the stud (20) contacts the housing (10), at least a portion of the stud (20) in contact with the housing (10) is exposed to the groove (210).

10. The positioning fixture according to claim 1, characterized in that, The positioning member (200) is provided in two sets, and the inclined grooves (210) on the two sets of positioning members (200) are arranged in opposite directions; Alternatively, the positioning member (200) is provided with an abutment surface (240) at one end away from the frame (100), and the abutment surface (240) is configured to abut against the box (10) when the frame (100) and the box (10) are positioned and engaged; And / or, the frame (100) includes reinforcing ribs (300) that extend along the length of the frame (100); And / or, the frame (100) includes a handle (400).

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