Charging pile with shape correcting mechanism
By setting a straightening mechanism inside the charging pile to adjust the deformation of the shell, the problems of assembly accuracy and appearance between the shell and the door are solved, achieving precise assembly and aesthetic effect of the charging pile.
Patent Information
- Application Number
- CN202422760604.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-11-12
AI Technical Summary
The charging pile shell is deformed during the manufacturing process due to processing and manufacturing and its own structural reasons, which affects the assembly accuracy and appearance between the shell and the door body, and even affects the sealing.
A correction mechanism is set in the charging pile shell, including a first adjustment arm, a second adjustment arm and an adjustment mechanism. The adjustment mechanism is used to adjust the distance between the two adjustment arms to correct the deformation of the shell and ensure assembly accuracy and appearance.
Effectively correct shell deformation, meet assembly accuracy requirements, improve appearance visual effects, and ensure the sealing between the door body and the shell.
Smart Images

Figure CN223462766U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to charging pile technical field, especially a kind of charging pile with orthopaedic mechanism. BACKGROUND
[0002] In the manufacturing process of charging pile, the shell of charging pile often appears deformation due to machining and its own structure, which leads to the change of the preset assembly position between the shell and the door body, not only can not meet the requirement of assembly accuracy, but also affects product appearance, and even seriously affects the sealing of door body seal strip. SUMMARY
[0003] Therefore, the utility model aims at providing a kind of charging pile with orthopaedic mechanism, which can solve the problem of poor appearance of existing charging pile.
[0004] In order to achieve the above technical purpose, the utility model provides a kind of charging pile with orthopaedic mechanism, including charging pile shell and orthopaedic mechanism, the charging pile shell is equipped with opening for adapting door body, the orthopaedic mechanism is located in the opening, the orthopaedic mechanism includes first adjusting arm, second adjusting arm and adjusting mechanism connected with the first adjusting arm and the second adjusting arm, the adjusting mechanism includes first fixed part, second fixed part and connecting part, the first fixed part is located on the connecting part, for limiting the fixed position of the first adjusting arm, the second fixed part is located on the connecting part, for limiting the fixed position of the second adjusting arm, the distance between the first fixed part and the second fixed part is adjustable.
[0005] In an embodiment, one of the first fixed part and the second fixed part is fixed relative to the connecting part, and the fixed position of the other one of the first fixed part and the second fixed part on the connecting part is adjustable.
[0006] In an embodiment, the first fixed part is fixed to one end of the connecting part and fixedly connected with the first adjusting arm, and the second fixed part includes first limiting part and second limiting part arranged on two opposite sides of the second adjusting arm, and the fixed position of the first limiting part and the second limiting part on the connecting part is adjustable.
[0007] In an embodiment, external threads are arranged on the connecting part, and the first limiting part and the second limiting part are threadedly connected with the connecting part.
[0008] In an embodiment, insertion holes are arranged on the connecting part in axial arrangement, and the first limiting part and the second limiting part are plug-in connected with the connecting part.
[0009] In one embodiment, the first adjustment arm and the second adjustment arm each include a main body, an end plate portion provided at one end of the main body, and a mounting portion provided at the other end of the main body. The corrective mechanism is installed in the charging pile housing through the mounting portion, and the adjustment mechanism is connected to the end plate portion.
[0010] In one embodiment, the end plate portion extends along the axial direction of the charging pile housing toward one end of the charging pile housing, and the mounting portion extends along the axial direction of the charging pile housing toward the other end of the charging pile housing.
[0011] In one embodiment, a card seat is provided in the housing of the charging pile, the card seat is adjacent to the side wall of the opening, and the first adjustment arm and the second adjustment arm are clamped on the card seat through the mounting portion.
[0012] In one embodiment, there are multiple card holders, and the multiple card holders are arranged along the axial direction of the charging pile housing.
[0013] In one embodiment, the first adjustment arm and the second adjustment arm are disposed between two opposite side walls of the opening in a transverse direction.
[0014] By adopting the above technical solution, the utility model has the following beneficial effects:
[0015] The utility model provides a corrective mechanism in the charging pile, which not only helps to solve the problem that the charging pile shell of the charging pile is deformed due to processing and manufacturing and its own structure, resulting in changes in the preset assembly position between the charging pile shell and the door body, but also can meet the requirements of assembly accuracy and improve the appearance and visual effect of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0017] Figure 1 A schematic structural diagram of a charging pile with a correction mechanism provided in an embodiment of the present utility model;
[0018] Figure 2 for Figure 1 The schematic diagram of the charging pile with the corrective mechanism when it is installed on the door body is shown;
[0019] Figure 3 for Figure 1A structure schematic view of a charging pile shell of a charging pile with an orthopedic mechanism shown;
[0020] Figure 4 A structure schematic view of the orthopedic mechanism in the first perspective view in the embodiment one of the utility model;
[0021] Figure 5 A structure schematic view of the orthopedic mechanism in the second perspective view in the embodiment one of the utility model;
[0022] Figure 6 A structure schematic view of the adjusting mechanism of the orthopedic mechanism in the embodiment two of the utility model. Figure 3
[0023] Figure 7 A structure schematic view of the adjusting mechanism of the orthopedic mechanism in the embodiment two of the utility model.
[0024] Explanation of reference signs:
[0025] 1, charging pile shell; 2, orthopedic mechanism; 3, door body;
[0026] 11, opening; 12, clamping seat;
[0027] 21, first adjusting arm; 22, second adjusting arm; 23, 23a, adjusting mechanism;
[0028] 211, main body part; 212, end plate part; 213, mounting part;
[0029] 231, 231a, first fixing part; 232, 232a, second fixing part; 233, 233a, connecting part; 234, 234a, first limiting part; 235, 235a, second limiting part. Specific implementation
[0030] The specific embodiments of the utility model will be described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the description of the utility model, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the utility model.
[0031] In the description of the utility model, unless explicitly defined and limited, the terms "arrangement", "installation", "connection" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, or electrically connected, can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0032] The terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the utility model product is usually placed, and are only for the convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0033] The terms "first", "second", "third" and the like are merely for distinguishing similar attributes, and do not indicate or imply relative importance or a particular order.
[0034] The terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, in addition to including the listed elements, other elements not explicitly listed can also be included.
[0035] Embodiment one
[0036] According to the understanding of the inventor, in the manufacturing process of the charging pile, the shell of the charging pile often deforms (such as outward expansion, inward concave, etc.) at the mounting position of the door body due to the reasons of machining and manufacturing and the structure of the shell (such as the temperature difference between the inside and outside of the shell, the oversize of the shell, etc.), which causes the change of the preset assembly position between the shell and the door body, not only cannot meet the assembly precision requirement, but also affects the appearance of the product, and even seriously affects the sealing performance of the door body sealing strip.
[0037] In order to solve the problem of poor appearance of the existing charging pile, please refer to Figure 1 The embodiment of the utility model provides a charging pile with a straightening mechanism, which comprises a charging module (not shown in the figure), a charging cable (not shown in the figure), a charging head (not shown in the figure), a charging pile shell 1 and a straightening mechanism 2, wherein the charging module is installed in the charging pile shell 1 and electrically connected with the power supply, the charging cable is electrically connected between the charging module and the charging head, and the straightening mechanism 2 is installed in the charging pile shell 1. It should be noted that the charging module referred to herein refers to the functional module or circuit board inside the charging pile, which is mainly used for converting the external alternating current into direct current suitable for load charging; the charging cable refers to the cable for transmitting electric energy from the charging module to the energy storage unit (such as battery, capacitor, etc.) of the load, which is used for realizing the conversion and transmission of electric energy.
[0038] As Figure 2 , Figure 3As shown, in order to facilitate the daily inspection and maintenance of the charging pile, the charging pile in the embodiment further comprises a door body 3, and the middle part of the charging pile shell 1 is provided with an opening 11 matched with the door body 3. Specifically, the opening 11 is in a strip shape and extends along the axial direction of the charging pile shell 1; the door body 3 is in an arc plate shape, which is convenient for matching with the cylindrical charging pile shell 1. Preferably, the charging pile shell 1 is made of metal material.
[0039] As shown in Figure 4 , Figure 5 In order to correct the shape of the charging pile shell 1, especially in the opening 11 area of the charging pile, in order to ensure that the assembly accuracy of the charging pile shell 1 and the door body 3 meets the requirements, a shape correcting mechanism 2 is installed in the opening 11. Specifically, the shape correcting mechanism 2 comprises a first adjusting arm 21, a second adjusting arm 22 and an adjusting mechanism 23, wherein the adjusting mechanism 23 is connected between the first adjusting arm 21 and the second adjusting arm 22, and is used to adjust the total length of the shape correcting mechanism 2. Specifically, the adjusting mechanism 23 adjusts the total length of the shape correcting mechanism 2 by adjusting the matching length of the first adjusting arm 21 and the second adjusting arm 22. In the embodiment, the matching length of the first adjusting arm 21 and the second adjusting arm 22 refers to the distance between the first adjusting arm 21 and the second adjusting arm 22. In the embodiment, the adjusting mechanism 23 comprises a first fixing part 231, a second fixing part 232 and a connecting part 233, wherein the first fixing part 231 is arranged at one end of the connecting part 233 and is used to limit the fixed position of the first adjusting arm 21, the second fixing part 232 is arranged at the other end of the connecting part 233 and is used to limit the fixed position of the second adjusting arm 22, and the distance between the first fixing part 231 and the second fixing part 232 is adjustable. By adjusting the distance between the first fixing part 231 and the second fixing part 232, the total length of the shape correcting mechanism 2 can be adjusted to correct the shape of the charging pile shell 1 when the charging pile shell 1 is deformed outwardly or inwardly, or the shape correcting mechanism 2 is directly arranged in the charging pile shell 1 to support the charging pile shell 1 and avoid deformation of the charging pile shell 1.
[0040] Specifically, the first fixed part 231 is fixedly connected with the connecting part 233 and is fixed relative to the connecting part 233, and the specific fixing manner of the first fixed part 231 and the connecting part 233 can be welding or one-piece forming. In the embodiment, the first fixed part 232 and the connecting part 233 are one-piece formed. The connecting part 233 is fixedly connected with the first adjusting arm 21 through the first fixed part 231. In the embodiment, after the connecting part 233 passes through the first adjusting arm 21, the first fixed part 231 and the first adjusting arm 21 are welded together to realize the one-piece connection of the connecting part 233 and the first adjusting arm 21. The second fixed part 232 includes a first limiting part 234 and a second limiting part 235 arranged on two opposite sides of the second adjusting arm 22. The fixed positions of the first limiting part 234 and the second limiting part 235 on the connecting part 233 are adjustable. By adjusting the positions of the first limiting part 234 and the second limiting part 235 on the connecting part 233, the distance between the first adjusting arm 21 and the second adjusting arm 22 can be adjusted to realize the adjustment of the total length of the orthopedic mechanism 2.
[0041] Preferably, in the embodiment, external threads are formed on the connecting part 233, and the first limiting part 234 and the second limiting part 235 are connected with the connecting part 233 in a threaded connection manner. During adjustment, by adjusting the positions of the first limiting part 234 and the second limiting part 235 on the connecting part 233, the total length of the orthopedic mechanism 2 can be adjusted to realize the inward pulling or outward supporting of the charging pile shell parts on both sides of the opening 11, and the orthopedic of the charging pile shell 1 is realized. From the horizontal direction, when the opening 11 area of the charging pile appears outward expansion deformation, the transverse distance between the opposite two side walls of the opening 11 is greater than the preset value. At this time, the operator can reduce the transverse distance between the first adjusting arm 21 and the second adjusting arm 22 by tightening the first limiting part 234 and the second limiting part 235 on the connecting part 233. At this time, the transverse distance between the opposite two side walls at the opening 11 is reduced under the inward pulling action of the first adjusting arm 21 and the second adjusting arm 22, and the fine adjustment and correction of the charging pile shell 1 with outward expansion deformation can be realized. Conversely, when the opening 11 area of the charging pile appears inward deformation, the transverse distance between the opposite two side walls of the opening 11 is less than the preset value. By rotating the first limiting part 234 and the second limiting part 235 on the connecting part 233, the transverse distance between the first adjusting arm 21 and the second adjusting arm 22 can be increased. At this time, the transverse distance between the opposite two side walls at the opening 11 is increased under the outward supporting action of the first adjusting arm 21 and the second adjusting arm 22, and the fine adjustment and correction of the charging pile shell 1 with inward deformation can be realized to ensure the assembly precision of the charging pile shell 1 and the door body 3.
[0042] It should be noted that in the embodiment, the first fixed part 231 is fixedly connected with the first adjusting arm 21, the second fixed part 232 is movably connected with the second adjusting arm 22, and the distance between the first adjusting arm 21 and the second adjusting arm 22 is adjusted by adjusting the position of the second fixed part 232 on the connecting part 233. It can be understood that the adjusting mode of the utility model is not limited to this, for example, the first fixed part 231 can be movably connected with the first adjusting arm 21, and the second fixed part 232 can be fixedly connected with the second adjusting arm 22, which can also achieve the adjustment of the distance between the first adjusting arm 21 and the second adjusting arm 22. In this adjusting mode, the structure of the first fixed part 231 and the second fixed part 232 can be exchanged, and the first fixed part 231 is provided with the first limiting part 234 and the second limiting part 235. For another example, the connection mode of the first fixed part 231 and the second fixed part 232 with the corresponding first adjusting arm 21 and second adjusting arm 22 is movably connected, and the first fixed part 231 and the second fixed part 232 are provided with the first limiting part 234 and the second limiting part 235, which can also achieve the adjustment of the distance between the first adjusting arm 21 and the second adjusting arm 22.
[0043] Further, in the embodiment, in order to ensure that the two sides of the opening 11 region of the charging pile are consistent or substantially the same in the orthopedic amount caused by the inward pulling or outward supporting of the first adjusting arm 21 and the second adjusting arm 22, the first adjusting arm 21 and the second adjusting arm 22 are symmetrically arranged. Specifically, the shapes of the first adjusting arm 21 and the second adjusting arm 22 match the shape of the charging pile shell 1, and both include a main body part 211, an end plate part 212 and a mounting part 213. The connecting hole for the connecting part 233 to pass through is formed on the end plate part 212, and the end plate part 212 is bent from one end of the main body part 211 and extends along the axial direction of the charging pile shell 1 to the direction close to one end of the charging pile shell 1, and the mounting part 213 is bent from the other end of the main body part 211 and extends along the axial direction of the charging pile shell 1 to the direction close to the other end of the charging pile shell 1, for mounting the orthopedic mechanism 2 into the charging pile shell 1. It should be noted that the main body part 211 is in the shape of an arc plate, and the shape close to the side surface of the charging pile shell 1 is consistent with the corresponding part of the inner surface of the charging pile shell 1; the mounting part 213 is in the shape of a concave or L-shaped structure, and this structure can hang the orthopedic mechanism 2 on the charging pile shell 1.
[0044] Specifically, as shown in FIG. 5, the first adjusting arm 21 and the second adjusting arm 22 are symmetrically arranged on the two sides of the opening 11 region of the charging pile shell 1, and the first adjusting arm 21 and the second adjusting arm 22 are connected by the connecting part 233. Figure 3 , Figure 6As shown, in order to realize the installation of the orthopedic mechanism 2 on the charging pile shell 1, a card seat 12 is formed in the charging pile shell 1, the length direction of the card seat 12 is perpendicular to the side wall of the opening 11, the orthopedic mechanism 2 is placed in the opening 11, the installation part 213 can be moved to the card seat 12 along the axial direction of the charging pile shell 1 and clamped on the card seat 12, and the first adjusting arm 21 and the second adjusting arm 22 are clamped on the corresponding card seat 12. Preferably, the number of card seats 12 can be multiple groups, and these card seats 12 can be arranged on both sides of the opening 11 along the axial direction of the charging pile shell 1. In this way, when the charging pile shell 1 is deformed, the orthopedic mechanism 2 can be installed at the corresponding position of the card seat 12, the shape of the charging pile shell 1 can be adjusted, a plurality of orthopedic mechanisms 2 can be installed at different positions of the charging pile shell 1 to correct the shape of the charging pile shell 1, ensure that the assembly accuracy between the charging pile shell 1 and the door body 3 meets the size technical specification requirements, or one or more orthopedic mechanisms 2 are directly arranged in the charging pile shell 1 to prevent the charging pile shell 1 from being deformed.
[0045] Generally, the charging pile is arranged in the vertical direction of the ground during use. In the embodiment, in order to ensure that the inward pulling or outward supporting effect of the orthopedic mechanism 2 on both sides of the opening 11 area meets the expectation, the first adjusting arm 21 and the second adjusting arm 22 are arranged between the opposite two side walls of the opening 11 in the transverse direction, so as to solve the outward expansion or inward concave deformation problem of the opening 11 area through the adjusting mechanism 23, and improve the visual effect of the appearance of the charging pile.
[0046] Embodiment two
[0047] Please refer to Figure 2 , Figure 3 and Figure 7 , most of the features of the charging pile with the orthopedic mechanism provided in the embodiment two of the utility model are the same as those of the charging pile in the foregoing embodiments, and the difference lies in the adjusting mechanism. The following will be described in detail.
[0048] In the embodiment two, the adjusting mechanism 23a includes a first fixing part 231a, a second fixing part 232a and a connecting part 233a, wherein the first fixing part 231a is arranged at one end of the connecting part 233a and is used to define the fixed position of the first adjusting arm 21, the second fixing part 232a is arranged at the other end of the connecting part 233a and is used to define the fixed position of the second adjusting arm 22, and the distance between the first fixing part 231a and the second fixing part 232a is adjustable. By adjusting the distance between the first fixing part 231a and the second fixing part 232a, the total length of the orthopedic mechanism 2 can be adjusted.
[0049] Specifically, the first fixed part 231a is integrally formed with the connecting part 233a, the connecting part 231a penetrates the first adjusting arm 21 and the second adjusting arm 22, and the connecting part 233a is fixedly connected with the first adjusting arm 21 through the first fixed part 231a. The second fixed part 232a includes a first limiting part 234a and a second limiting part 235a arranged on two opposite sides of the second adjusting arm 22, and the fixed positions of the first limiting part 234a and the second limiting part 235a on the connecting part 233a are adjustable. By adjusting the fixed positions of the first limiting part 234a and the second limiting part 235a on the connecting part 233a, the distance between the first adjusting arm 21 and the second adjusting arm 22 can be adjusted, and the adjustment of the total length of the orthopedic mechanism 2 is realized.
[0050] It should be noted that in the second embodiment, a plurality of insertion holes are formed on the connecting part 233a, the plurality of insertion holes are arranged at intervals along the axial direction of the connecting part 233a, the first limiting part 234a and the second limiting part 235a are connected with the connecting part 233a in a plug-in manner, and by adjusting the insertion positions of the first limiting part 234a and the second limiting part 235a on the connecting part 233a, the distance between the first adjusting arm 21 and the second adjusting arm 22 can be adjusted, and the inner pulling or outer supporting of the side wall of the opening 11 is realized.
[0051] Compared with the prior art, the utility model has the following beneficial effects:
[0052] The utility model discloses a charging pile is provided with the orthopedic mechanism 2, not only beneficially solve the charging pile shell 1 of charging pile due to the machining and manufacture and the reason of self -structure and appear the deformation, lead to the preset assembly position between the charging pile shell 1 and door body 3 change the problem, can also satisfy the requirement of assembly accuracy, improve the appearance visual effect of product.
[0053] The above describes only the specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of the change or replacement within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the appended claims.
Claims
1. A charging pile with an orthopedic mechanism, characterized in that, The application relates to a charging pile shell (1) and an orthopedic mechanism (2), the charging pile shell (1) is provided with an opening (11) for adapting a door body (3), the orthopedic mechanism (2) is arranged in the opening (11), the orthopedic mechanism (2) comprises a first adjusting arm (21), a second adjusting arm (22) and an adjusting mechanism (23, 23a) connected with the first adjusting arm (21) and the second adjusting arm (22), the adjusting mechanism (23, 23a) comprises a first fixed part (231, 231a), a second fixed part (232, 232a) and a connecting part (233, 233a), the first fixed part (231, 231a) is arranged on the connecting part (233, 233a) and is used for defining a fixed position of the first adjusting arm (21), the second fixed part (232, 232a) is arranged on the connecting part (233, 233a) and is used for defining a fixed position of the second adjusting arm (22), and the distance between the first fixed part (231, 231a) and the second fixed part (232, 232a) is adjustable.
2. The charging pile with the orthopedic mechanism as claimed in claim 1, wherein, One of the first fixed part (231, 231a) and the second fixed part (232, 232a) is fixed relative to the connecting part (233, 233a), and the fixed position of the other of the first fixed part (231, 231a) and the second fixed part (232, 232a) on the connecting part (233, 233a) is adjustable.
3. The charging pile with the orthopedic mechanism according to claim 2, characterized in that, The first fixed part (231, 231a) is fixed to one end of the connecting part (233, 233a) and is fixedly connected with the first adjusting arm (21), the second fixed part (232, 232a) comprises a first limiting part (234, 234a) and a second limiting part (235, 235a) arranged on two opposite sides of the second adjusting arm (22), and the fixed positions of the first limiting part (234, 234a) and the second limiting part (235, 235a) on the connecting part (233, 233a) are adjustable.
4. The charging pile with the orthopedic mechanism according to claim 3, characterized in that, The connecting part (233, 233a) is provided with external threads, and the first limiting part (234, 234a) and the second limiting part (235, 235a) are threadedly connected with the connecting part (233, 233a).
5. The charging station with a prosthetic mechanism according to claim 3, wherein, The connecting part (233, 233a) is provided with insertion holes arranged in an axial direction, and the first limiting part (234, 234a) and the second limiting part (235, 235a) are plug-connected with the connecting part (233, 233a).
6. The charging station with a prosthetic mechanism according to claim 1, wherein, The first adjusting arm (21) and the second adjusting arm (22) each comprise a main body part (211), an end plate part (212) arranged at one end of the main body part (211) and a mounting part (213) arranged at the other end of the main body part (211), the orthopedic mechanism (2) is mounted into the charging pile shell (1) through the mounting part (213), and the adjusting mechanism (23, 23a) is connected with the end plate part (212).
7. The charging station with a prosthetic mechanism according to claim 6, characterized in that, The end plate part (212) extends along the axial direction of the charging pile shell (1) towards the end of the charging pile shell (1) close to one end, and the mounting part (213) extends along the axial direction of the charging pile shell (1) towards the end of the charging pile shell (1) close to the other end.
8. The charging station with a prosthetic mechanism according to claim 6, wherein, The charging pile shell (1) has a clamping seat (12) therein, the clamping seat (12) is adjacent to the side wall of the opening (11), and the first adjusting arm (21) and the second adjusting arm (22) are clamped on the clamping seat (12) through the mounting part (213).
9. The charging station with a prosthetic mechanism according to claim 8, characterized in that, The number of the clamping seats (12) is multiple, and multiple clamping seats (12) are arranged along the axial direction of the charging pile shell (1).
10. The charging station with a prosthetic mechanism according to claim 1, wherein, The first adjusting arm (21) and the second adjusting arm (22) are arranged between the opposite two side walls of the opening (11) in the transverse direction.