BMS support and high-voltage distribution box of lithium battery high-voltage box

Abstract

The application relates to a BMS support of a lithium battery high-voltage box and a high-voltage distribution box, and belongs to the technical field of batteries. The BMS support of the lithium battery high-voltage box comprises a supporting assembly which comprises a pair of suspended beams arranged at intervals; and a plate assembly which comprises an upper mounting plate and a lower mounting plate connected between the two sides of the suspended beams, the upper mounting plate is arranged on the top surface of the two sides of the suspended beams, and the two sides of the lower mounting plate are provided with bent arms and are hung on the two sides of the suspended beams through the bent arms. The upper mounting plate of the BMS support is arranged on the top surface of the two sides of the suspended beams, the size of the BMS module arranged on the top surface of the upper mounting plate is not limited by the structure of the suspended beam, and the BMS module can be arranged flexibly; the lower mounting plate is hung on the two sides of the suspended beams through the bent arms, the design of the bent arms makes it possible to reserve mounting space above the lower mounting plate, another BMS module can also be arranged on the top surface of the lower mounting plate, the vertical stacking of the BMS modules is realized, the space occupation is effectively reduced, and the space utilization is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a BMS bracket and a high-voltage distribution box for a lithium battery high-voltage box. Background Technology

[0002] The existing BMS brackets in lithium battery high-voltage boxes have low compatibility with different manufacturers' BMS models, and cannot accommodate multiple BMS from different brands. Changing the BMS brand and model requires repositioning the BMS bracket's mounting structure. However, the BMS bracket's mounting structure is typically welded to the inner wall of the high-voltage box; changing its position is equivalent to replacing the entire high-voltage box enclosure. Since high-voltage box enclosures are custom-made products with long procurement and manufacturing cycles, changing the BMS bracket's mounting position significantly impacts project delivery time and manufacturing costs.

[0003] In related technologies, a common practice is to weld fixing points to the inner wall of the high-voltage box, and then fix it to the inner wall with two triangular brackets using bolts and nuts. The mounting holes of the BMS bracket are then connected to the fixing nuts of the triangular brackets using bolts. While this design allows for the installation of a single BMS module, it has significant drawbacks: it only supports the horizontal arrangement of a single module, cannot fully utilize the internal space of the high-voltage box, resulting in low space utilization (typically only accommodating one BMS module), and cannot meet the modern requirements of multi-module integration. Furthermore, the existing structure lacks scalability and is difficult to adapt to future iterations and upgrades of BMS technology.

[0004] In view of the above problems, the existing technology has significant shortcomings in terms of compatibility, space utilization efficiency and cost control. There is an urgent need for a new BMS bracket and high-voltage distribution box solution to support the vertical stacking layout of BMS modules, thereby optimizing space occupation, improving overall space utilization, and reducing project delivery risks and manufacturing costs caused by BMS replacement. Summary of the Invention

[0005] In view of the shortcomings or deficiencies mentioned in the background technology, the present application provides a BMS bracket and high-voltage distribution box for a lithium battery high-voltage box, which can realize the vertical stacking of BMS modules, which helps to reduce the space occupation of BMS and improve space utilization.

[0006] In a first aspect, embodiments of this application provide a BMS bracket for a lithium battery high-voltage box, comprising: A support assembly, comprising pairs of spaced-apart cantilever beams; The plate assembly includes an upper mounting plate and a lower mounting plate connected between the two cantilever beams. The upper mounting plate is mounted on the top surface of the two cantilever beams, and the lower mounting plate is provided with curved arms on both sides and is suspended from the two cantilever beams through the curved arms.

[0007] In some embodiments, the cantilever beam is provided with first waist holes at both ends for installing fastener lap fixing seats; The top surface of the cantilever beam is provided with a first threaded hole for installing fasteners to connect to the upper mounting plate, and a clip hole for fixing wire harness clips; The side of the cantilever beam is provided with a second threaded hole for installing fasteners to connect the curved arm.

[0008] In some embodiments, the top surface of the upper mounting plate is provided with a through hole for installing fasteners to connect the cantilever beam, and a first mounting hole for installing fasteners to connect the first module.

[0009] In some embodiments, the upper mounting plate has its side bent upward to form a first folded edge, and the two ends of the first folded edge extend to the top of the cantilever beams on both sides.

[0010] In some embodiments, the lower mounting plate is bent upwards on both sides to form the curved arm, and the curved arm is provided with a second waist hole for installing fasteners to connect the cantilever beam.

[0011] In some embodiments, the curved arms on both sides are connected to the opposite sides of the cantilever beams on both sides, or the curved arms on both sides are connected to the opposite sides of the cantilever beams on both sides.

[0012] In some embodiments, the plane containing the top surface of the lower mounting plate is located below the cantilever beam, and the top surface of the lower mounting plate is provided with a second mounting hole for installing fasteners to connect the second module.

[0013] In some embodiments, the lower mounting plate has its side bent upward to form a second folded edge, with the two ends of the second folded edge connected to the two curved arms respectively, and the second folded edge is provided with cable tie fixing holes.

[0014] In some embodiments, the top surface of the upper mounting plate is provided with a first weight-reducing hole, and the top surface of the lower mounting plate is provided with a second weight-reducing hole.

[0015] Secondly, embodiments of this application provide a high-voltage distribution box, comprising: The box body has symmetrically arranged fixing seats on both sides of its inner cavity; The BMS bracket of the lithium battery high-voltage box described in any of the above claims, wherein the two ends of the cantilever beam of the BMS bracket are attached to the fixed base.

[0016] The beneficial effects of the technical solution provided in this application include: This application provides a BMS bracket and a high-voltage distribution box for a lithium battery high-voltage box. The support assembly includes a pair of cantilever beams that are spaced apart. The plate assembly includes an upper mounting plate and a lower mounting plate connected between the two side cantilever beams. The upper mounting plate is mounted on the top surface of the two side cantilever beams, and the lower mounting plate has curved arms on both sides and is suspended from the two side cantilever beams by the curved arms.

[0017] Therefore, the upper mounting plate is erected on the top surface of the cantilever beams on both sides. The size of the BMS module installed on the top surface of the upper mounting plate is not limited by the cantilever beam structure and can be flexibly arranged. The lower mounting plate is hoisted on the cantilever beams on both sides by curved arms. The curved arm design allows for reserved installation space above the lower mounting plate, so that another BMS module can also be installed on the top surface of the lower mounting plate. This enables the vertical stacking of BMS modules, effectively reducing space occupation and improving space utilization. Attached Figure Description

[0018] 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 accompanying 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.

[0019] Figure 1 This is a schematic diagram of the structure of the BMS support according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a BMS support according to another embodiment of this application; Figure 3 This is a schematic diagram of the cantilever beam structure according to an embodiment of this application; Figure 4 This is a schematic diagram of the upper mounting plate in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the lower mounting plate according to an embodiment of this application; Figure 6 This is a schematic diagram illustrating the implementation of the BMS support according to an embodiment of this application; Figure 7 This is a schematic diagram of the high-voltage distribution box according to an embodiment of this application.

[0020] The attached diagram lists the components represented by each number as follows: 1. BMS bracket; 2. Mounting base; 3. First module; 4. Second module; 11. Cantilever beam; 111. First waist hole; 112. First threaded hole; 113. Second threaded hole; 114. Locking hole; 12. Upper mounting plate; 121. Through hole; 122. First mounting hole; 123. First folded edge; 124. First weight reduction hole; 13. Lower mounting plate; 130. Bent arm; 131. Second waist hole; 132. Second mounting hole; 133. Second folded edge; 134. Cable tie fixing hole; 135. Second weight reduction hole. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In view of the shortcomings or deficiencies mentioned in the background technology, the present application provides a BMS bracket and high-voltage distribution box for a lithium battery high-voltage box, which can realize the vertical stacking of BMS modules, which helps to reduce the space occupation of BMS and improve space utilization.

[0023] See Figures 1 to 7 As shown, the first aspect of this application provides a BMS bracket for a lithium battery high-voltage box, comprising: A support assembly, comprising pairs of spaced-apart cantilever beams 11; The plate assembly includes an upper mounting plate 12 and a lower mounting plate 13 connected between the two side cantilever beams 11. The upper mounting plate 12 is mounted on the top surface of the two side cantilever beams 11, and the lower mounting plate 13 is provided with curved arms 130 on both sides and is hoisted to the two side cantilever beams 11 through the curved arms 130.

[0024] The BMS bracket of the lithium battery high-voltage box in this embodiment adopts a pair of parallel and spaced-apart cantilever structures, with an upper mounting plate 12 and a lower mounting plate 13 connecting the two cantilever beams 11. The upper mounting plate 12 is securely mounted on the top surface of the cantilever beams 11 by fasteners, so that the installation of the BMS module is not limited by the distribution and spacing of the two cantilever beams 11, and can flexibly adapt to various brands and models of BMS modules.

[0025] The lower mounting plate 13 has integrally formed vertically extending curved arms 130 on both sides. The curved arms 130 are connected to the cantilever beam 11 by fasteners to form a suspended installation method. The ingenious design of the curved arms 130 leaves sufficient space above the lower mounting plate 13 to ensure that another BMS module can be stably installed on the top surface of the lower plate, thereby realizing the vertical stacking layout of the BMS modules.

[0026] This vertical integration solution not only effectively reduces the overall space occupied by the BMS module and significantly improves the utilization rate of the internal space of the high-voltage box, but also completely solves the problem of space waste caused by single-module installation in traditional designs.

[0027] More importantly, this structure eliminates the need to adjust the bracket fixing position due to changes in BMS brand or model, avoiding the need to replace the high-voltage box enclosure, significantly shortening the project delivery cycle, reducing manufacturing costs, and enhancing compatibility with multiple BMS brands. It provides a practical and economical solution for the efficient integration and flexible upgrade of lithium battery high-voltage boxes.

[0028] Firstly, in some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides a BMS bracket for a lithium battery high voltage box. The two ends of the suspension beam 11 of the BMS bracket for the lithium battery high voltage box are provided with first waist holes 111 for installing fastener lap fixing seats 2. The top surface of the cantilever beam 11 is provided with a first threaded hole 112 for installing fasteners to connect to the upper mounting plate 12, and a clip hole 114 for fixing wire harness clips; The side of the cantilever beam 11 is provided with a second threaded hole 113 for installing fasteners to connect the bent arm 130.

[0029] In this embodiment, the cantilever beam 11 is made of sheet metal bent into a C-shape with the opening facing downwards to ensure installation stability and structural strength. The top surfaces at both ends of the cantilever beam 11 are provided with first waist holes 111 for connecting to the fixing seats 2 welded to the side walls of the box via fasteners, thus achieving precise overlap and reliable fixation of the cantilever beam 11.

[0030] The top surface of the cantilever beam 11 has first threaded holes 112 spaced along its length, which facilitates the adaptation of upper mounting plates 12 of different sizes and specifications, significantly improving the compatibility of the bracket with BMS modules from multiple brands. In addition, the top surface of the cantilever beam 11 also integrates a snap-fit ​​hole 114 design for snapping and fixing wire harness clips, effectively managing the wire harness layout, avoiding clutter and enhancing the overall integration.

[0031] The side of the cantilever beam 11 is also provided with a second threaded hole 113 for installing fasteners to connect the bent arm 130 and ensure the stable suspension of the lower mounting plate 13. In this embodiment, four first threaded holes 112 are provided; two pairs of locking holes 114 are provided, totaling four, and are located on both sides of the first thread distribution area; the length direction of the first waist hole 111 is consistent with the length direction of the cantilever beam 11.

[0032] In other embodiments, the cantilever beam 11 structure can be flexibly replaced with a rectangular beam or an L-shaped beam to meet diverse design requirements and further optimize space utilization and assembly efficiency.

[0033] Firstly, in some alternative embodiments: see Figures 1 to 7As shown, this application embodiment provides a BMS bracket for a lithium battery high-voltage box. The top surface of the upper mounting plate 12 of the BMS bracket for the lithium battery high-voltage box is provided with a through hole 121 for mounting fasteners to connect the cantilever beam 11, and a first mounting hole 122 for mounting fasteners to connect the first module 3.

[0034] In this embodiment, the top surface of the upper mounting plate 12 is provided with four rectangularly distributed through holes 121 for reliably connecting the cantilever beam 11 through fasteners; at the same time, eight first mounting holes 122 are configured, divided into inner and outer rings, with four in each ring distributed in a rectangular shape, which can flexibly adapt to different models of the first module 3, the first module 3 being a BMS module or other functional modules.

[0035] This design not only significantly enhances the compatibility of the bracket with multiple brands and specifications of modules, but also simplifies the installation process through modular layout, avoiding the need for structural adjustments due to changes in module models, thereby effectively improving the utilization rate of the internal space of the high-voltage box and the efficiency of product development.

[0036] Firstly, in some alternative embodiments: see Figures 1 to 7 As shown in the figure, this application embodiment provides a BMS bracket for a lithium battery high voltage box. The upper mounting plate 12 of the lithium battery high voltage box has a first folded edge 123 formed by bending the side upward. The two ends of the first folded edge 123 extend to the upper part of the two side suspension beams 11 respectively.

[0037] In this embodiment, the upper mounting plate 12 has its sides bent upwards to form a first folded edge 123. The two ends of the first folded edge 123 extend above the cantilever beams 11 on both sides and are perpendicular to the upper mounting plate 12. This structural design significantly enhances the structural rigidity of the upper mounting plate 12, effectively distributes the installation load and prevents deformation during operation, ensuring that the BMS module is stably supported under vibration or external force, avoiding loosening or displacement, thereby greatly improving the overall installation reliability and long-term system stability.

[0038] Firstly, in some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides a BMS bracket for a lithium battery high voltage box. The lower mounting plate 13 of the lithium battery high voltage box has two sides bent upward to form bent arms 130. The bent arms 130 are provided with second waist holes 131 for installing fasteners to connect the cantilever beam 11.

[0039] In this embodiment, the lower mounting plate 13 is bent upwards on both sides to form bent arms 130. The bent arms 130 are perpendicular to the top surface of the lower mounting plate 13, and a second waist hole 131 is provided on them for connecting the suspension beam 11. The bent arms 130 are symmetrically distributed, and the length direction of the second waist hole 131 is parallel to the top surface of the lower mounting plate 13, so that the position can be flexibly adjusted along the direction of the waist hole during installation, which facilitates the alignment and connection of the suspension beam 11, ensures that the lower mounting plate 13 is accurately positioned and firmly suspended, and improves the ease of installation.

[0040] Firstly, in some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides a BMS bracket for a lithium battery high voltage box. The two curved arms 130 of the BMS bracket for the lithium battery high voltage box are connected to the opposite sides of the two side suspension beams 11, or the two curved arms 130 are connected to the opposite sides of the two side suspension beams 11.

[0041] In this embodiment, the two curved arms 130 can be selectively connected to the opposite or back-to-back sides of the cantilever beam 11 via fasteners. When connected to the opposite sides, the structure is compact and simplified, completely avoiding the occupation of the outer space of the cantilever beam 11; while when connected to the back-to-back sides, the top surface of the lower mounting plate 13 can extend to below the cantilever beam 11, forming a wider installation area, providing ample layout space for the BMS module, significantly improving the utilization rate of the internal space of the high-voltage box and the flexibility of system integration, and meeting diverse installation needs.

[0042] Firstly, in some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides a BMS bracket for a lithium battery high voltage box. The plane on the top surface of the lower mounting plate 13 of the BMS bracket for the lithium battery high voltage box is located below the cantilever beam 11. The top surface of the lower mounting plate 13 is provided with a second mounting hole 132 for installing fasteners to connect the second module 4.

[0043] In this embodiment, the curved arm 130 extends downward so that the plane on the top surface of the lower mounting plate 13 is precisely positioned below the cantilever beam 11, forming a spacious accommodating space between the top surface of the lower mounting plate 13 and the bottom surface of the upper mounting plate 12, providing sufficient conditions for the installation of the second module 4, which is a BMS module or other functional module.

[0044] The top surface of the lower mounting plate 13 is equipped with four second mounting holes 132 arranged in a rectangular pattern. The second module 4 can be quickly and securely connected by fasteners, realizing the vertical stacking layout of the BMS modules, effectively avoiding space conflicts, significantly improving the internal space utilization of the high-voltage box, simplifying the assembly process, and ensuring stable and reliable system operation.

[0045] Firstly, in some alternative embodiments: see Figures 1 to 7As shown in the embodiment of this application, a BMS bracket for a lithium battery high voltage box is provided. The lower mounting plate 13 of the BMS bracket for the lithium battery high voltage box is bent upward to form a second folded edge 133. The two ends of the second folded edge 133 are respectively connected to the two side bent arms 130. The second folded edge 133 is provided with cable tie fixing holes 134.

[0046] In this embodiment, the lower mounting plate 13 is bent upward on the side to form a second folded edge 133, and its two ends are welded and fixed to the two side bent arms 130, which significantly enhances the structural rigidity of the lower mounting plate 13, evenly distributes the installation load and effectively suppresses deformation during operation.

[0047] This design ensures the BMS module is firmly supported under vibration or external forces, preventing loosening or displacement, and significantly improving installation reliability and long-term system stability. Meanwhile, cable tie fixing holes 134 are provided on the second folded edge 133 for convenient and easy fixing of suspended wire harnesses, optimizing wire harness layout management and further enhancing the internal integration and operational reliability of the high-voltage box.

[0048] Firstly, in some alternative embodiments: see Figures 1 to 7 As shown in the figure, this application provides a BMS bracket for a lithium battery high voltage box. The top surface of the upper mounting plate 12 of the BMS bracket for the lithium battery high voltage box is provided with a first weight reduction hole 124, and the top surface of the lower mounting plate 13 is provided with a second weight reduction hole 135.

[0049] In this embodiment, a first weight-reduction hole 124 is provided on the top surface of the upper mounting plate 12, and a second weight-reduction hole 135 is provided on the top surface of the lower mounting plate 13, effectively reducing the overall weight. This design optimizes material utilization efficiency while maintaining structural strength, avoids unnecessary weight accumulation, significantly reduces the weight of the high-voltage box, and improves system energy efficiency and installation convenience.

[0050] See Figures 1 to 7 As shown, a second aspect of this application provides a high-voltage distribution box, including: The box body has symmetrically arranged fixing seats 2 on both sides of its inner cavity; In any of the above embodiments, the BMS bracket 1 of the lithium battery high voltage box has its two ends of the suspension beam 11 attached to the fixed base 2.

[0051] In the high-voltage distribution box of this application embodiment, fixed seats 2 are symmetrically welded to the two side walls of the inner cavity of the box. The two ends of the cantilever beam 11 of the BMS bracket 1 are precisely connected to the fixed seats 2 by fasteners to achieve stable support. The double-layer installation structure design effectively suppresses the risk of displacement caused by vibration during operation, ensures the long-term stable operation of the BMS module, simplifies the assembly process, improves the integration efficiency and reliability of the high-voltage distribution box, and provides a solid foundation for the flexible adaptation of multi-brand BMS modules.

[0052] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0053] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A BMS bracket for a lithium battery high-voltage box, characterized in that, include: Support components include pairs of spaced-apart cantilever beams (11). The plate assembly includes an upper mounting plate (12) and a lower mounting plate (13) connected between the two side suspension beams (11). The upper mounting plate (12) is mounted on the top surface of the two side suspension beams (11). The lower mounting plate (13) is provided with curved arms (130) on both sides and is hoisted to the two side suspension beams (11) through the curved arms (130).

2. The BMS bracket for the lithium battery high-voltage box as described in claim 1, characterized in that: The cantilever beam (11) has first waist holes (111) at both ends for installing fastener lap fixing seats (2). The top surface of the cantilever beam (11) is provided with a first threaded hole (112) for installing fasteners to connect the upper mounting plate (12), and a clip hole (114) for fixing the wire harness clip. The side of the cantilever beam (11) is provided with a second threaded hole (113) for installing fasteners to connect the bent arm (130).

3. The BMS bracket for the lithium battery high-voltage box as described in claim 1, characterized in that: The top surface of the upper mounting plate (12) is provided with a through hole (121) for installing fasteners to connect the cantilever beam (11) and a first mounting hole (122) for installing fasteners to connect the first module (3).

4. The BMS bracket for the lithium battery high-voltage box as described in claim 1, characterized in that: The upper mounting plate (12) has a first folded edge (123) formed by bending the side upwards. The two ends of the first folded edge (123) extend to the top of the cantilever beams (11) on both sides.

5. The BMS bracket for the lithium battery high-voltage box as described in claim 1, characterized in that: The lower mounting plate (13) is bent upward on both sides to form the bent arm (130), and the bent arm (130) is provided with a second waist hole (131) for installing fasteners to connect the cantilever beam (11).

6. The BMS bracket for the lithium battery high-voltage box as described in claim 1, characterized in that: The curved arms (130) on both sides are connected to the opposite sides of the cantilever beams (11) on both sides, or the curved arms (130) on both sides are connected to the opposite sides of the cantilever beams (11) on both sides.

7. The BMS bracket for the lithium battery high-voltage box as described in claim 1, characterized in that: The plane on the top surface of the lower mounting plate (13) is located below the cantilever beam (11), and the top surface of the lower mounting plate (13) is provided with a second mounting hole (132) for installing fasteners to connect the second module (4).

8. The BMS bracket for the lithium battery high-voltage box as described in claim 1, characterized in that: The lower mounting plate (13) has a second folded edge (133) formed by bending the side upward. The two ends of the second folded edge (133) are respectively connected to the two curved arms (130) on both sides. The second folded edge (133) is provided with cable tie fixing holes (134).

9. The BMS bracket for the lithium battery high-voltage box as described in claim 1, characterized in that: The top surface of the upper mounting plate (12) is provided with a first weight reduction hole (124), and the top surface of the lower mounting plate (13) is provided with a second weight reduction hole (135).

10. A high-voltage distribution box, characterized in that, include: The box body has fixed seats (2) symmetrically arranged on both sides of its inner cavity. The BMS bracket (1) of the lithium battery high voltage box according to any one of claims 1 to 9, wherein the two ends of the suspension beam (11) of the BMS bracket (1) are attached to the fixed base (2).

Images