CN107946950B

CN107946950B - A kind of collapsible double-radiation function switchgear

Info

Publication number: CN107946950B
Application number: CN201711277162.XA
Authority: CN
Inventors: 俞爱华
Original assignee: Individual
Current assignee: Jiangtian Technology Co ltd
Priority date: 2017-12-06
Filing date: 2017-12-06
Publication date: 2018-11-02
Anticipated expiration: 2037-12-06
Also published as: CN107946950A

Abstract

The invention discloses a kind of collapsible double-radiation function switchgears, including locating part, are set to two side positions of the collapsible double-radiation function switchgear, including the first locating part and the second locating part；Top cover is set to the top of the collapsible double-radiation function switchgear, and two sides are connected with the upper end of first locating part and the second locating part respectively；Separator is set between first locating part and the second locating part；Radiating subassembly is set on the locating part；And vent, it is set to the bottom of the collapsible double-radiation function switchgear.The present invention is respective hinged by top cover and separator so that overall structure can be collapsed or is unfolded, and can form structure latches after deployment.Since bottom plate and back side panel are detachable, convenient for actual assembled and break.And radiating subassembly and being applied in combination for vent can realize excellent result of ventilating heat dissipation.

Description

Foldable double heat dissipation cubical switchboard

Technical Field

The invention relates to the technical field of power system equipment, in particular to a switch cabinet which can be assembled and disassembled and can be folded.

Background

The intelligent switch cabinet is a cabinet with high performance, high reliability, certain self-diagnosis and automatic control performance and network communication capability. The switch cabinet is an electric device, the outside line firstly enters the main control switch in the cabinet and then enters the branch control switch, and each branch is set according to the requirement. Such as meters, automatic controls, magnetic switches of motors, various alternating current contactors, and the like, some of which are also provided with high-voltage chambers and low-voltage chamber switch cabinets, and high-voltage buses, such as power plants, and some of which are also provided with low-frequency load shedding for keeping main equipment.

The intelligent switch cabinet can be divided into a power distribution type, a motor control type and other control function types in form. The distribution type uses an intelligent circuit breaker as a core device, remote control, remote measurement, remote signaling and remote regulation of a distribution circuit are realized by an upper computer, and the motor control type uses a frequency converter and an intelligent motor controller as core devices to realize the optimal control of starting, running and stopping of a motor. Other control type intelligent switch cabinets are control type switch cabinets taking a Programmable Logic Controller (PLC) as a core, various control functions in the production process are completed, the control type intelligent switch cabinet is also the most potential product for automatic control development in the industrial production process, the PLC technology is organically combined with the traditional switch cabinet, and the control type intelligent switch cabinet is an effective measure for realizing intelligent transformation of a common switch cabinet with less investment and quick effect.

Conventional intelligent switch cabinet is bulky, has many inconveniences in actual production, warehouse deposit and transportation, also has some cubical switchboard that can assemble on the existing market of course, but its structural stability after assembling is not enough, and because dismantle completely between each part discrete, the process of equipment is consuming time and is hard. Meanwhile, the heat dissipation problem in the switch cabinet is also a common important problem, and the heat dissipation effect of a single heat dissipation mode is poor.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above and/or other problems with existing switchgear.

Therefore, one of the objects of the present invention is to provide a folding type dual heat dissipation switch cabinet which can be easily assembled and disassembled and can be folded while having an excellent dual heat dissipation function.

In order to solve the technical problems, the invention provides the following technical scheme: a folding type double-heat-dissipation switch cabinet comprises limiting pieces, a first heat-dissipation switch cabinet body and a second heat-dissipation switch cabinet body, wherein the limiting pieces are arranged at two side positions of the folding type double-heat-dissipation switch cabinet body and comprise a first limiting piece and a second limiting piece; the top cover component is arranged at the top of the folding type double-heat-dissipation switch cabinet, and two side edges of the top cover component are respectively connected with the upper ends of the first limiting piece and the second limiting piece; the separator is arranged between the first limiting piece and the second limiting piece, and two ends of the separator are respectively connected with the first limiting piece and the second limiting piece; the heat dissipation assembly is arranged on the limiting piece; and the ventilation piece is arranged at the bottom of the folding ventilation switch cabinet.

As a preferable scheme of the folding type double heat dissipation switch cabinet of the invention, wherein: the first limiting part and the second limiting part are mutually corresponding in overall structure, are vertically arranged and are mutually parallel.

As a preferable scheme of the folding type double heat dissipation switch cabinet of the invention, wherein: the top cover member comprises a first top cover member and a second top cover member; one end of the first top cover component is connected with the first limiting component, one end of the second top cover component is connected with the second limiting component, and the other ends of the first top cover component and the second top cover component are hinged to each other.

As a preferable scheme of the folding type double heat dissipation switch cabinet of the invention, wherein: the divider comprises a first divider and a second divider;

one end of the first separating piece is connected with the first limiting piece, one end of the second separating piece is connected with the second limiting piece, and the other ends of the first separating piece and the second separating piece are hinged with each other.

As a preferable scheme of the folding type double heat dissipation switch cabinet of the invention, wherein: one end of the first top cover component, which is connected with the first limiting component, is provided with a connecting component, and the other end of the first top cover component is provided with a first matching component; one end of the second top cover component, which is connected with the second limiting component, is provided with a connecting component, and the other end of the second top cover component is provided with a second matching component; the first matching piece and the second matching piece are matched with each other correspondingly and hinged through a positioning piece.

As a preferable scheme of the folding type double heat dissipation switch cabinet of the invention, wherein: a longitudinal through hole and a transverse through hole are formed in the positioning piece, the longitudinal through hole penetrates through the longitudinal center of the positioning piece, and a return element is arranged in the positioning piece; one end of the transverse through hole penetrates out of the side face of the positioning piece to be communicated with the outside, and a clamping piece is arranged in the transverse through hole.

As a preferable scheme of the folding type double heat dissipation switch cabinet of the invention, wherein: the side surface of the clamping piece is provided with an inclined hole, and the reduction piece penetrates through the inclined hole and is provided with a clamping knot matched with the inclined hole; the lower end of the clamping piece is provided with an elastic piece, and the elastic piece is connected with the bottom of the transverse through hole.

As a preferable scheme of the folding type double heat dissipation switch cabinet of the invention, wherein: the side edges of the first matching piece and the second matching piece are provided with positioning seams matched with the clamping piece.

As a preferable scheme of the folding type double heat dissipation switch cabinet of the invention, wherein: one end of the first spacing part, which is connected with the first limiting part, is provided with a connecting part, and the other end of the first spacing part is provided with a third fitting part; one end of the second separator, which is connected with the second limiting piece, is provided with a connecting piece, and the other end of the second separator is provided with a fourth matching piece; the third fitting piece and the fourth fitting piece are correspondingly matched with each other and hinged through a connecting shaft.

As a preferable scheme of the folding type double heat dissipation switch cabinet of the invention, wherein: the inner side surfaces of the first limiting part and the second limiting part are provided with convex parts connected with the connecting part.

The invention has the beneficial effects that: according to the invention, through the hinge connection between the first top cover part and the second top cover part and the hinge connection between the first separating part and the second separating part, the whole structure can be smoothly folded or unfolded when being pushed and pulled by external force, and the structure can be locked after being unfolded, so that the stability is improved. Meanwhile, only the bottom plate and the rear side plate are detachable parts, and the structure does not need to be completely detached, so that the assembly and disassembly during actual use are facilitated. And the heat dissipation component can realize ventilation and heat dissipation without affecting the overall tightness. And the combined use of the heat dissipation assembly and the ventilation piece can realize excellent ventilation and heat dissipation effects.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a schematic side view of a first embodiment of a foldable dual heat dissipation switch cabinet according to the present invention.

Fig. 2 is a schematic plan view of a first top cover member according to a second embodiment of the foldable dual heat dissipation switch cabinet of the present invention.

Fig. 3 is a schematic structural diagram of a second top cover member and a detailed connection diagram of a heat dissipation assembly according to a second embodiment of the foldable dual heat dissipation switch cabinet of the present invention.

Fig. 4 is a schematic side view of a first top cover member and a second top cover member of a second embodiment of the foldable dual heat-dissipating switch cabinet of the present invention.

Fig. 5 is a schematic view illustrating the installation of a top cover member according to a second embodiment of the foldable dual heat dissipation switch cabinet of the present invention.

Fig. 6 is a schematic view of an external structure of a positioning element according to a second embodiment of the foldable dual heat dissipation switch cabinet of the present invention.

Fig. 7 to 9 are schematic diagrams illustrating the locking and unlocking processes of the positioning element according to the second embodiment of the foldable dual heat dissipation switch cabinet of the present invention.

Fig. 10 is a schematic view of a first partition structure of a foldable dual heat-dissipating switchgear according to a third embodiment of the present invention.

Fig. 11 is a schematic structural view of a second separating member according to a third embodiment of the folding type dual heat dissipation switch cabinet of the present invention.

Fig. 12 is a schematic side view of a first partition and a second partition in a third embodiment of the foldable dual-heat-dissipation switch cabinet of the invention.

Fig. 13 is a schematic view illustrating the installation of the partition in the third embodiment of the folding dual heat-dissipation switch cabinet of the present invention.

Fig. 14 to 16 are schematic views illustrating an overall structure stretching process of a foldable dual heat dissipation switch cabinet according to a third embodiment of the present invention.

Fig. 17 is a schematic view of a bottom plate structure of a foldable dual heat dissipation switch cabinet according to a fourth embodiment of the present invention.

Fig. 18 is a schematic view of a rear side plate and a detailed view of a chute of a fourth embodiment of the folding type dual heat dissipation switch cabinet of the present invention.

Fig. 19 is a schematic diagram illustrating an installation position of a heat dissipation assembly according to a fifth embodiment of the foldable dual heat dissipation switch cabinet of the present invention.

Fig. 20 is a schematic view, i.e., a detailed connection diagram, of the overall structure of a heat dissipation assembly according to a fifth embodiment of the foldable dual heat dissipation switch cabinet of the present invention.

Fig. 21 is a schematic plan view of a ventilation member of a sixth embodiment of the folding type dual heat dissipation switch cabinet of the present invention.

Fig. 22 is a schematic view illustrating the installation of the ventilation member in the sixth embodiment of the folding type dual heat dissipation switch cabinet of the present invention.

Fig. 23 is a schematic structural diagram of a door assembly of a seventh embodiment of the folding dual heat-dissipation switch cabinet of the present invention.

Fig. 24 is a schematic view of an overall structure of a damping assembly according to a seventh embodiment of the foldable dual heat dissipation switch cabinet of the present invention.

Fig. 25 is a schematic view of a rotating shaft structure of a seventh embodiment of the folding type dual heat dissipation switch cabinet of the present invention.

Fig. 26 is a schematic structural view of a wear-resistant block according to a seventh embodiment of the folding dual heat dissipation switch cabinet of the present invention.

Fig. 27 is a schematic view of an elastic damping block according to a seventh embodiment of the foldable dual heat dissipation switch cabinet of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Referring to fig. 1, a schematic side view of a foldable double-heat-dissipation switch cabinet according to a first embodiment of the present invention is provided. As can be seen from the figure, the main structure of the present invention includes a limiting member 100, which is disposed at two sides of the foldable dual heat dissipation switch cabinet and includes a first limiting member 101 and a second limiting member 102; the top cover component 200 is arranged at the top of the folding type double-heat-dissipation switch cabinet, and two side edges of the top cover component are respectively connected with the upper ends of the first limiting piece 101 and the second limiting piece 102; and a spacer 300 disposed between the first limiting member 101 and the second limiting member 102, both ends of which are respectively connected to the first limiting member 101 and the second limiting member 102.

Specifically, the main structure of the foldable dual heat dissipation switch cabinet of the present invention includes a limiting member 100. The position-limiting member 100 has the function of limiting the positions on both sides and forming a partitioned accommodating space. In the present invention, the limiting member 100 is a thin plate and is disposed at two side edges of the foldable dual heat dissipation switch cabinet. Further, the limiting member 100 is vertically disposed and includes a first limiting member 101 and a second limiting member 102. The two are respectively positioned at the left side and the right side of the integral structure of the invention. The first limiting member 101 and the second limiting member 102 are symmetrical with each other, and are vertically arranged and parallel to each other.

The main structure of the folding type double heat dissipation switch cabinet also comprises a top cover part 200. The top cover member 200 serves as a top cover seal in the present invention. The double-side heat dissipation switch cabinet is arranged at the top of the folding double-heat dissipation switch cabinet, and two side edges of the double-side heat dissipation switch cabinet are respectively connected with the upper ends of the first limiting piece 101 and the second limiting piece 102. Further, the cap member 200 includes a first cap member 201 and a second cap member 202. One end of the first top cover member 201 and one end of the second top cover member 202 are respectively hinged with the upper ends of the first retaining member 101 and the second retaining member 102, and the other ends of the first top cover member and the second top cover member are hinged with each other. Specifically, one end of the first cap member 201 is hinged to the top of the first stopper 101; one end of the second top cover 202 is hinged to the top of the second retaining member 102, and the other ends of the first top cover 201 and the second top cover 202 are hinged to each other.

Further, the overall structure of the first and second lid members 201 and 202 are similar, and the structures are complementary to each other, and the two are symmetrically arranged. In the present embodiment, the first lid member 201 and the second lid member 202 are each a single side of the lid member 200, are plate-shaped as a whole, and are each hinged to each other in the longitudinal direction.

The main structure of the folding type double-heat-dissipation switch cabinet further comprises a separator 300. The separator 300 has a function of a layered partition to form a layered space in the present invention. The spacer 300 is disposed between the first stopper 101 and the second stopper 102, and is connected to both sides thereof, respectively. Further, the partition 300 includes a first partition 301 and a second partition 302. One end of the first separating member 301 and one end of the second separating member 302 are respectively hinged to the first limiting member 101 and the second limiting member 102, and the other ends of the first separating member and the second separating member are hinged to each other. Specifically, one end of the first spacer 301 is connected to the middle portion inside the first stopper 101; one end of the second spacer 302 is connected to the middle portion of the inner side of the second limiting member 102. Meanwhile, the other ends of the first and second partitions 301 and 302 are hinged to each other.

Further, the overall structure of the first separator 301 and the second separator 302 are similar, and the structures are complementary to each other, and the two separators are symmetrically disposed. In the present embodiment, the first and second partitions 301 and 302 are each one-sided and single-branched of the partition 300, are plate-shaped as a whole, and are each hinged to each other in the longitudinal direction.

In this embodiment, the first partition 301 is located right below the first cap member 201, and the length and width of the first partition are the same, and the first partition and the first cap member are parallel to each other at all times; meanwhile, the second separator 302 is also located right below the second cap member 202, and the length and width dimensions of the two members are the same, and the parallel positional relationship is maintained at all times.

Referring to fig. 2 to 9, a second embodiment of the present invention is different from the first embodiment in that: one end of the first top cover component 201 connected with the first limiting component 101 is provided with a connecting component L, and the other end is provided with a first matching component P-1; one end of the second top cover component 202 connected with the second limiting component 102 is provided with a connecting component L, and the other end is provided with a second matching component P-2; the first mating member P-1 and the second mating member P-2 are correspondingly engaged with each other and hinged by the positioning member 400.

Specifically, as can be seen from the above, one end of the first cap member 201 is hinged to the first limiting member 101, and the other end is hinged to one end of the second cap member 202. Meanwhile, the other end of the second cap member 202 is hinged to the second stopper 102.

Further, the first lid member 201 and the second lid member 202 are connected by fitting and fitting the first fitting member P-1 and the second fitting member P-2 to each other. The first member P-1 is located at the inside edge of the first cover member 201 and the second member P-2 is located at the inside edge of the second cover member 202.

Further, the first fitting member P-1 is tubular and has a through hole formed therein and extending therethrough in the longitudinal direction. In this embodiment, the first mating member P-1 has a longitudinal length, but less than the longitudinal length of the body of the first cap member 201. And a plurality of first fitting members P-1 are provided at the inner side edge of the first lid member 201, and all the first fitting members P-1 are arranged uniformly at equal intervals. The interval length between every two adjacent first matching pieces P-1 is just the longitudinal length of one first matching piece P-1, so as to ensure that the corresponding second matching piece P-2 can be smoothly matched and connected with the first matching piece P-1.

Meanwhile, the second fitting member P-2 is also tubular corresponding to the first fitting member P-1, and has a through hole formed therein and extending therethrough in the longitudinal direction. In this embodiment, the second fitting member P-2 also has a longitudinal length that is less than the longitudinal length of the body of the first cap member 201. And the second fitting members P-2 are fitted to the first fitting members P-1, and a plurality of second fitting members P-2 are provided at the inner side edge of the second lid member 202, each corresponding to a vacant position between the first fitting members P-1. Therefore, the second fitting parts P-2 are positioned to be complementary to all the first fitting parts P-1, and the inner ends of the two fitting parts can be engaged with each other under the complementary staggered structure to form connection. Therefore, all the second fitting parts P-2 are arranged equidistantly and uniformly. The interval length between every two adjacent second matching parts P-2 is just the longitudinal length of one second matching part P-2, so as to ensure that the corresponding first matching part P-1 can be smoothly matched and connected with the first matching part P-2.

Further, after the first fitting part P-1 and the second fitting part P-2 are in butt joint engagement, both the first fitting part P-1 and the second fitting part P-2 are tubular, and both the first fitting part P-1 and the second fitting part P-2 are internally provided with through holes. Therefore, the through holes inside the first mating member P-1 and the second mating member P-2 after connection are communicated with each other, and the positioning member 400 is inserted into the communicated through holes to realize hinge joint, so that the whole first top cover member 201 and the whole second top cover member 202 can be turned around the positioning member 400 as an axis.

Further, a longitudinal through hole T-1 and a transverse through hole T-2 are formed in the positioning piece 400, the longitudinal through hole T-1 penetrates through the longitudinal center of the positioning piece 400, and the original 401 is arranged in the positioning piece; one end of the transverse through hole T-2 penetrates through the side surface of the positioning member 400 to be communicated with the outside, and a clamping member 402 is arranged in the transverse through hole.

Further, the positioning member 400 is generally a solid cylinder as a whole, but has a certain structure of accommodating space therein, specifically: the positioning member 400 has a longitudinal through hole T-1 and a lateral through hole T-2 therein. The longitudinal through hole T-1 is a hollow channel along the longitudinal direction of the positioning member 400, the cross section is square, and the longitudinal through hole T-1 is located at the central axis of the positioning member 400. The transverse through hole T-2 is a hollow channel perpendicular to the direction of the longitudinal through hole T-1 and vertically led to the side surface of the positioning member 400, wherein one end of the transverse through hole passes through the outer side surface of the positioning member 400 to be communicated with the outside, and the other end of the transverse through hole passes through the longitudinal through hole T-1 and exceeds a certain length without penetrating through the side surface of the positioning member 400. The transverse through-hole T-2 is also square in cross section and communicates internally with the longitudinal through-hole T-1.

Further, a reducing piece 401 is provided inside the longitudinal through hole T-1. The main body of the original 401 is a solid rod, the section of the main body is square, and the size of the section is slightly smaller than the size of an inner hole of the longitudinal through hole T-1, so that the original 401 can be pushed and pulled in the longitudinal through hole T-1. Meanwhile, the clamping piece 402 is also arranged in the transverse through hole T-2, the clamping piece 402 is integrally in a solid quadrangular prism shape, and the size of the cross section of the clamping piece 402 is slightly smaller than the size of an inner hole of the transverse through hole T-2, so that the clamping piece 402 can be ensured to be capable of performing telescopic displacement in the transverse through hole T-2.

Further, an inclined hole X is formed in the side surface of the clamping piece 402, and the restoring piece 401 passes through the inclined hole X and is provided with a clamping knot 401a matched with the inclined hole X; the lower end of the clip member 402 is provided with an elastic member 403, and is connected to the bottom of the lateral through hole T-2 by the elastic member 403. Specifically, the side surface of the clip piece 402 has an inclined hole X penetrating between two generatrices corresponding to one diameter. The inclined hole X is an inclined channel with a rectangular section, penetrates through the side face of the clamping piece 402 and forms a certain included angle with the longitudinal through hole T-1. Meanwhile, the restoring member 401 is inserted into the inside of the longitudinal through hole T-1, which is at the position of the card 402, and also through the inclined hole X of the card 402. Therefore, the original 401 is also provided with a bent catch 401a at a position corresponding to the inclined hole X. The fastening structure 401a is configured to be matched with the inclined hole X and the longitudinal through hole T-1 at the central axis, and has a bent shape with one end protruding outwards. One bent side penetrates through the inclined hole X and has the same inclined angle with the inclined hole X, and the other bent side is folded back to the central shaft to continuously keep the corresponding position of the longitudinal through hole T-1 at the rear end.

Further, the sectional dimension of the bent side of the catch 401a is smaller than the corresponding sectional dimension of the inclined hole X. Meanwhile, the inside of the positioning member 400 main body corresponds to the side position of the clamping knot 401a to form a specific allowable space R, and the allowable space R is a vacant space matched with the external structure of the clamping knot 401a and is used for providing a vacant space for allowing movement for the protruding clamping knot 401a when the positioning member 400 with the clamping knot 401a is pushed and pulled in the longitudinal through hole T-1.

Meanwhile, the clamping piece 402 is arranged inside the transverse through hole T-2, the inner end face of the clamping piece 402 is connected with an elastic piece 403, and the other end of the elastic piece 403 is fixed with the bottom face of the transverse through hole T-2, so that the clamping piece 402 can elastically stretch out and draw back in the transverse through hole T-2 to a certain degree. The elastic member 403 may be a compression spring.

Furthermore, only one return element 401 and a longitudinal through hole T-1 which penetrate all the time are arranged in the positioning element 400, but a plurality of groups of the same clamping pieces 402, clamping knots 401a and transverse through holes T-2 are arranged in the positioning element, the number of the groups is the sum of the common number of the first matching pieces P-1 and the second matching pieces P-2, and each group of structures is arranged in the corresponding first matching pieces P-1 and the corresponding second matching pieces P-2.

Furthermore, the side edges of the first fitting piece P-1 and the second fitting piece P-2 are both provided with a positioning slit F matched with the clamping piece 402. As the positioning piece 400 is integrally inserted into the through holes in the first fitting piece P-1 and the second fitting piece P-2, and the clamping piece 402 is arranged in the transverse through hole T-2, the clamping piece has the tendency of extending out of the transverse through hole T-2 and extending out of the side surface of the positioning piece 400 under the action of the elastic piece 403, the side surfaces of all the first fitting pieces P-1 and the second fitting pieces P-2 are provided with positioning seams F corresponding to the positions of the clamping piece 402. The positioning slit F is in a long slit shape, and the slit width is slightly larger than the side length of the cross section of the clamping piece 402, so that the clamping piece 402 can extend into the corresponding positioning slit F again after extending out of the side surface of the positioning piece 400, and the clamping and locking of the positioning piece 400 and the first mating piece P-1 and the second mating piece P-2 are realized. In the invention, the positioning seams F on the side surfaces of the first mating piece P-1 and the second mating piece P-2 are set to have the following specific positions: when the first and second lid members 201 and 202 are both turned to the horizontal position at a flat angle of 180 °, the positioning slit F is located just at the uppermost side of the first and second mating members P-1 and P-2, corresponding to the catch 402.

Thus, as shown in fig. 5, 7 to 9, the locking and unlocking processes when the first and second caps 201 and 202 are turned around the positioning member 400 are performed.

When both the first and second caps 201 and 202 are in the vertical state, the present overall structure is in the collapsed state. At this time, the first and second caps 201 and 202 are close to each other, and parallel to each other. As the unitary structure is stretched laterally, the first and second caps 201, 202 are flipped about the retainer 400. At this time, since the distance between the first and second lid members 201 and 202 has not reached 180 °, the position of the positioning slit F has not been rotated to the position of the clip 402, and therefore, the clip 402 is pressed against the inside of the lateral through hole T-2 and cannot be extended outward. Finally, when the first and second caps 201 and 202 are turned to an angle of 180 °, the positioning slit F corresponds exactly to the position of the catch 402. The clip piece 402 is pushed by the elastic force of the elastic member 403 to displace, and the outer end of the clip piece extends into the positioning slit F to be locked with the first mating piece P-1 and the second mating piece P-2 (at this time, the bent edge of the clip knot 401a is just completely attached to the lower surface of the inclined hole X of the clip piece 402, that is, the clip knot 401a is just matched with the structural shape of the inclined hole X and is embedded into one corner end of the inclined hole X), as shown in fig. 7.

Pushing the original 401 will drive the fastening knot 401a to displace inwards. Because the clamping knot 401a is matched with the inclined hole X of the clamping piece 402, the displacement of the clamping knot 401a generates pressure on the contact surface of the clamping knot 401a and the inclined hole X, and the inclined hole X has a certain angle, so the pressure of the clamping knot 401a on the inclined hole X has a vertically downward component force, and the component force promotes the clamping piece 402 to generate downward displacement in the transverse through hole T-2 integrally, as shown in fig. 8, finally, the clamping piece 402 gradually shrinks into the transverse through hole T-2. When the restoring member 401 is pushed further, the lower side of the main body of the restoring member 401 abuts against the upper corner of the lower surface of the inclined hole X, as shown in fig. 9, and the first engaging member P-1 and the second engaging member P-2 are freely rotated again, so that the structure is unlocked.

Referring to fig. 10 to 16, a third embodiment of the present invention is different from the second embodiment in that: one end of the first spacing part 301 connected with the first limiting part 101 is provided with a connecting piece L, and the other end is provided with a third fitting piece P-3; one end of the second spacing element 302 connected with the second limiting element 102 is provided with a connecting element L, and the other end is provided with a fourth mating element P-4. The third fitting part P-3 and the fourth fitting part P-4 are correspondingly matched with each other and hinged through a connecting shaft Z.

Specifically, one end of the first spacer 301 is hinged to the first limiting member 101 through the connecting member L, and the other end is hinged to one end of the second spacer 302. Meanwhile, the other end of the second spacer 302 is hinged to the second limiting member 102 through the connecting member L. It should be noted that, in the present invention, the connecting piece L of the outer ends of the first partition 301 and the second partition 302 is the same as the connecting piece L of the outer ends of the first cap member 201 and the second cap member 202, and is in the shape of a hollow circular tube, and has a passage inside, which is disposed at the outer ends of the first partition 301 and the second partition 302 (or the first cap member 201 and the second cap member 202), and the first partition 301 and the second partition 302 are hinged to the protruding pieces W of the first retaining member 101 and the second retaining member 102 through the connecting piece L, respectively. In this embodiment, the protruding part W is engaged with the connecting part L, and the protruding part is disposed on the inner side surfaces of the first limiting part 101 and the second limiting part 102, and has a circular hole corresponding to the size of the inner channel of the connecting part L, and the protruding part W and the connecting part L are hinged by a rotating shaft, so as to be capable of rotating freely.

Further, the inner end of the first partitioning member 301 is provided with a third fitting member P-3, and the inner end of the second partitioning member 302 is provided with a fourth fitting member P-4. The third fitting part P-3 and the fourth fitting part P-4 are identical in shape and size, and have circular channels inside. The third engaging member P-3 has a flat surface on one side corresponding to the first partitioning member 301 and a convex arc surface on the other side, and they are connected to each other.

Further, a plurality of third fitting members P-3 and fourth fitting members P-4 are provided and are equally spaced apart from each other at the inner end edges of the first and second partitioning members 301 and 302, respectively. The third mating part P-3 and the fourth mating part P-4 are mutually matched and embedded to form connection. In the present invention, the third fitting part P-3 and the fourth fitting part P-4 are distributed and complementarily connected in the same manner as the first lid member 201 and the second lid member 202 are hinged in the second embodiment. The third fitting piece P-3 and the fourth fitting piece P-4 are hinged through a connecting shaft Z, and the connecting shaft Z is inserted into circular channels in the third fitting piece P-3 and the fourth fitting piece P-4 in a penetrating mode. Wherein, the connecting shaft Z is in the shape of a solid cylinder rod.

Further, when the overall structure is transversely stretched, the first partition 301 and the second partition 302 are turned around the connection axis Z, and when the included angle between the two surfaces reaches 180 degrees, because one surface of the third mating member P-3 and the fourth mating member P-4 is a plane and the outer end angle is a right angle, the outer end surface of the third mating member P-3 and the outer end side surface of the main body of the second partition 302 form a motion limit; while the fourth mating element P-4 forms a motion limit with the outer end side of the body of the first divider 301. At this point, the two sides are constrained together, so that the first and second spacers 301 and 302 are kept at an angle of 180 ° and cannot rotate further.

Therefore, as can be seen from the above, when the overall structure is stretched in the transverse direction, the first and second spacers 301 and 302 and the first and second caps 201 and 202 can be flipped along the same direction until reaching the 180 ° horizontal state, so as to form the motion limitation, the structure is locked, and the overall motion flipping process can refer to fig. 14 to 16.

Referring to fig. 17 and 18, a fourth embodiment of the present invention is different from the third embodiment in that: the main body structure of the invention also comprises a bottom plate D and a rear side plate H.

The bottom plate D is disposed at a lower bottom position of the present invention, and has a plate-like main structure, and two side ends of the main structure are respectively connected to lower ends of the first limiting member 101 and the second limiting member 102. Specifically, the two ends of the upper surface of the bottom plate D are provided with slide bars M, and the cross section of each slide bar M is T-shaped. Meanwhile, the lower ends of the first limiting part 101 and the second limiting part 102 connected with the sliding strip M are provided with sliding grooves N matched with the shape of the sliding strip M, the sliding grooves N are long-strip-shaped grooves, the cross sections of the sliding grooves N are also T-shaped, and the shapes of the sliding grooves N are complementary to the shape of the sliding strip M. The connection of the slide bar M and the sliding groove N realizes the connection of the bottom plate D with the first limiting member 101 and the second limiting member 102, respectively.

The rear side plate H is disposed at a rear side position of the present invention, and is connected to rear end surfaces of the first limiting member 101 and the second limiting member 102, sliding bars M are disposed at two ends of the rear side plate, sliding grooves N are disposed on rear end surfaces of the first limiting member 101 and the second limiting member 102, and a connection manner of the rear side plate H and the first limiting member 101 and the second limiting member 102 is the same as an installation manner of the bottom plate D.

Referring to fig. 19 and 20, a fifth embodiment of the present invention, which is different from the first embodiment, is: the main structure of the present invention further includes a heat dissipation assembly 500 disposed on the position-limiting member 100.

Specifically, in the present invention, the heat dissipation assembly 500 has the functions of facilitating ventilation, heat dissipation and cooling inside the switch cabinet. The heat dissipation assembly 500 is disposed on the position-limiting member 100, that is, a through window C is opened on the surface of the position-limiting member 100, and the heat dissipation assembly 500 is installed in the window C.

Further, the heat dissipation assembly 500 includes a flow guiding plate 501, a connecting shaft 502, a driving member 503 and a driven shaft 504, and all the components are connected in sequence to form a linkage mechanism.

The flow guide plate 501 is used for directly guiding and evacuating hot air in the box body of the switch cabinet, and when the hot air is in an open state, the internal hot air flow is discharged from a gap between adjacent flow guide plates 501 along the panel direction of the flow guide plate 501. The whole drainage plate 501 is a plate-shaped structure, and in this embodiment, a plurality of drainage plates may be arranged and stacked in the window C. When all the drainage plates 501 are turned to be vertical, every two adjacent drainage plates 501 can just be connected end to form plugging; after all the flow guide plates 501 are turned over by a certain angle, an interlayer space exists between every two flow guide plates 501.

The connecting shaft 502 is used to fix the flow guide plate 501. The connecting shaft 502 is a rod-shaped structure with a circular cross section, and is inserted into one side edge of the flow guide plate 501, and both ends of the connecting shaft exceed the flow guide plate 501 by a length extending outwards. Meanwhile, the overhanging ends of the two ends of the connecting shaft 502 are respectively fixed on the two side walls of the window C, and the heights of the two sides are consistent. Further, since the flow guide plate 501 is fixed in the window C by the connecting shaft 502, and the through hole of the flow guide plate 501 is slightly larger than the outer diameter of the connecting shaft 502, the flow guide plate 501 can be turned over from the window C.

The driving part 503 is used for directly pushing the whole linkage system to perform corresponding movement, external force directly acts on the driving part 503, and the turning of the drainage plate 501 is finally controlled after transmission. Further, in this embodiment, the driving member 503 is connected to the side of the flow-guiding plate 501 via the driven shaft 504. Each side of the flow guide plate 501 is provided with a driven shaft 504, the driven shaft 504 being a relatively short circular cross-section shaft for articulation with the drive member 503. Further, the driving members 503 are rod-shaped, and since the driving members 503 are connected to the drainage plate 501 through the driven shaft 504, when the driving members 503 are pushed or pulled along the longitudinal direction of the driving members 503, all the driving members 503 will be driven to turn over in real time to reach a suitable height.

Referring to fig. 21 and 22, a sixth embodiment of the present invention, which is different from the first embodiment, is: the main structure of the present invention further includes a ventilation member 600 disposed at the bottom of the foldable double heat dissipation switch cabinet.

Specifically, the ventilation member 600 has the function of blowing air into the switch cabinet body to generate air flow and dissipate heat in the switch cabinet. In this embodiment, the ventilation member 600 is disposed at the bottom of the foldable double heat dissipation switch cabinet, and further, is disposed above the bottom plate D, and the opening direction is vertical upward. In the present invention, the ventilation member 600 may employ a sirocco fan.

Further, in this embodiment, a layer of standing plates J is further erected directly above the bottom plate D, and is used for directly mounting the ventilation member 600. The standing plate J is parallel to the bottom plate D and is separated from the bottom plate D by a certain distance. Meanwhile, two vertical laths are respectively arranged on the two side edges of the erecting plate J and are mutually vertical to the bottom plate D and the erecting plate J. The erection plate J is integrally connected with the bottom plate D through the laths with two vertical sides together with the ventilation member 600, and erected right above the bottom plate D in a spaced manner.

Furthermore, a through round hole is formed in the middle of the erecting plate J, and the main body of the ventilation piece 600 is directly placed in the round hole. Specifically, the ventilation member 600 is installed inside the circular hole by criss-cross fixing bars. The whole batten shape of dead lever, it has two, for the criss-cross mode of setting, both mutually perpendicular simultaneously, are the level setting. All the ends of the fixing rods are fixedly connected with the inner side wall of the circular hole, and the ventilation member 600 is installed at the central position where the two fixing rods are crossed.

In the above arrangement mode, the ventilation part 600 is not directly the ground but separated by a bottom plate D, so that a large amount of dust is not mixed with the inside of the cabinet body when the ventilation part 600 is normally operated and air is blown into the cabinet body.

Referring to fig. 23 to 27, a seventh embodiment of the present invention is different from the first embodiment in that: the main structure of the present invention further includes a door assembly 700, which is a single-leaf vertical hinged door, and one side of the door assembly is hinged to the side of the first limiting member 101. Door assembly 700 includes a damping assembly 701 and a door panel 702. Door panel 702 is the main body and base portion of door assembly 700. The damping component 701 has both a connection and a buffering function, and the door panel 702 is connected to the side of the first limiting member 101 through the damping component 701. The damping assembly 701 includes an elastic damping block 701a, a wear-resistant block 701b, a rotation shaft 701c, and an adjusting member 701 d.

Specifically, there is a notch at the connecting edge of door panel 702, and damping assembly 701 is disposed within this notch. Further, the upper end of the rotating shaft 701c is fixed at the top of the notch. The rotation shaft 701c has a cylindrical body, and an outer side surface of an upper end thereof is threaded for a length. Furthermore, the outer side surface of the rotating shaft 701c is further provided with two vertical first grooves 701c-1 and second grooves 701c-2, the first grooves 701c-1 and the second grooves 701c-2 are groove-shaped and are vertically arranged, and the two grooves are opposite to each other on the outer side surface of the rotating shaft 701 c.

In this embodiment, the wear-resistant block 701b is sleeved on the periphery of the rotating shaft 701 c. The main body of the wear-resistant block 701b is in a sleeve shape, the interior of the wear-resistant block is a hollow channel, and the inner diameter of the wear-resistant block corresponds to the outer diameter of the main body of the rotating shaft 701 c. Further, the inner side wall of the wear-resistant block 701b is provided with a first projection 701b-1 and a second projection 701b-2 corresponding to the first groove 701c-1 and the second groove 701 c-2. The first projection 701b-1 and the second projection 701b-2 are matched with the first groove 701c-1 and the second groove 701c-2 in size and structure, respectively, and are in complementary forms. When the wear-resistant block 701b needs to be sleeved on the outer side of the rotating shaft 701c, the first projection 701b-1 and the second projection 701b-2 only need to be aligned with the first groove 701c-1 and the second groove 701c-2 respectively, and the nesting can be achieved by pushing the first projection 701b-1 and the second projection 701b-2 forwards and backwards and upwards.

In this embodiment, the wear-resistant block 701b is inserted and bridged over the elastic damping block 701 a. One side of the elastic damping block 701a is fixed to the side of the first limiting member 101, and has an upward opening, and the size of the opening corresponds to the outer diameter of the main body of the wear-resistant block 701 b. Furthermore, a plurality of damping protrusions 701a-1 are arranged on the inner side wall of the elastic damping block 701a, and the damping protrusions 701a-1 are strip-shaped protrusions which are arranged at equal intervals along the longitudinal direction of the elastic damping block 701 a. Correspondingly, the outer side surface of the wear-resistant block 701b is provided with a first damping strip 701b-3 and a second damping strip 701b-4, the first damping strip 701b-3 and the second damping strip 701b-4 are strip-shaped high-strength wear-resistant protrusions, and the first damping strip 701b-3 and the second damping strip 701b-4 are oppositely arranged on the outer side surface of the wear-resistant block 701b along the longitudinal direction of the wear-resistant block 701 b. The widths of the first damping strips 701b-3 and the second damping strips 701b-4 are smaller than the distance between any two adjacent damping protrusions 701a-1, so that the first damping strips 701b-3 and the second damping strips 701b-4 can be embedded in gaps between the damping protrusions 701a-1 when the wear-resistant block 701b is inserted into the opening of the elastic damping block 701 a. When the door panel 702 is integrally wound around the rotating shaft 701c and drives the wear-resistant block 701b to rotate, the first damping strips 701b-3 and the second damping strips 701b-4 on the wear-resistant block 701b are in a discontinuous interval motion state due to the blocking effect of the densely arranged damping protrusions 701a-1, and the resistance effect is always existed in the rotating process.

Preferably, the end of the damping protrusion 701a-1 is provided with a tooth shape to optimize the resistance effect.

Further, the lower end of the wear-resistant block 701b is engaged with the bottom of the elastic damping block 701a through a compression spring. In this embodiment, the threaded section at the upper end of the rotating shaft 701c is further sleeved with an adjusting piece 701d, the adjusting piece 701d is a nut, and the adjusting piece 701d is always attached to the upper end surfaces of the wear-resistant block 701b and the elastic damping block 701a in the use process.

The damping component 701 can enable the door assembly 700 to have a certain buffering effect when the door assembly is rapidly closed or opened, and meanwhile, the door plate 702 can be fixedly opened to any angle to prevent external disturbance from turning over back and forth, and the overall stability is improved.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. The utility model provides a foldable double heat dissipation cubical switchboard which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the limiting pieces (100) are arranged at two side positions of the folding double-heat-dissipation switch cabinet and comprise first limiting pieces (101) and second limiting pieces (102);

the top cover component (200) is arranged at the top of the folding type double-heat-dissipation switch cabinet, and two side edges of the top cover component are respectively connected with the upper ends of the first limiting piece (101) and the second limiting piece (102);

the separator (300) is arranged between the first limiting piece (101) and the second limiting piece (102), and two ends of the separator are respectively connected with the first limiting piece (101) and the second limiting piece (102);

the heat dissipation assembly (500) is arranged on the limiting piece (100); and the number of the first and second groups,

a ventilation member (600) arranged at the bottom of the folding ventilation switch cabinet; wherein,

the cap member (200) comprises a first cap member (201) and a second cap member (202);

one end of the first top cover component (201) is connected with the first limiting component (101), one end of the second top cover component (202) is connected with the second limiting component (102), and the other ends of the first top cover component (201) and the second top cover component (202) are hinged with each other;

the partition (300) comprises a first partition (301) and a second partition (302);

one end of the first separating piece (301) is connected with the first limiting piece (101), one end of the second separating piece (302) is connected with the second limiting piece (102), and the other ends of the first separating piece (301) and the second separating piece (302) are hinged with each other;

one end of the first top cover component (201) connected with the first limiting component (101) is provided with a connecting component (L), and the other end is provided with a first matching component (P-1);

one end of the second top cover component (202) connected with the second limiting component (102) is provided with a connecting component (L), and the other end is provided with a second matching component (P-2);

the first fitting part (P-1) and the second fitting part (P-2) are correspondingly matched with each other and hinged through a positioning part (400);

a longitudinal through hole (T-1) and a transverse through hole (T-2) are formed in the positioning piece (400), the longitudinal through hole (T-1) penetrates through the longitudinal center of the positioning piece (400), and a return piece (401) is arranged in the positioning piece (400);

one end of the transverse through hole (T-2) penetrates through the side face of the positioning piece (400) to be communicated with the outside, and a clamping piece (402) is arranged in the transverse through hole;

an inclined hole (X) is formed in the side face of the clamping piece (402), the original piece (401) penetrates through the inclined hole (X), and a clamping knot (401a) matched with the inclined hole (X) is arranged;

the lower end of the clamping piece (402) is provided with an elastic piece (403), and is connected with the bottom of the transverse through hole (T-2) through the elastic piece (403);

the door assembly (700) is a single-leaf vertical hinged door, one side of the door assembly (700) is hinged to the side edge of the first limiting part (101), the door assembly (700) comprises a damping component (701) and a door panel (702), the door panel (702) is a main body and a base part of the door assembly (700), the damping component (701) has the functions of connection and buffering, the door panel (702) is connected to the side edge of the first limiting part (101) through the damping component (701), and the damping component (701) comprises an elastic damping block (701a), a wear-resisting block (701b), a rotating shaft (701c) and an adjusting part (701 d);

a gap is formed at the connecting edge of the door panel (702), the damping component (701) is arranged in the gap, the upper end of the rotating shaft (701c) is fixed at the top of the gap, the main body of the rotating shaft (701c) is cylindrical, the outer side surface of the upper end of the rotating shaft (701c) is provided with a length of thread, the outer side surface of the rotating shaft (701c) is also provided with two vertical first grooves (701c-1) and second grooves (701c-2), the first grooves (701c-1) and the second grooves (701c-2) are groove-shaped and are vertically arranged, and the first grooves and the second grooves are opposite to each other on the outer side surface of the rotating shaft (701 c);

the wear-resistant block (701b) is sleeved on the periphery of the rotating shaft (701c), the main body of the wear-resistant block (701b) is in a sleeve shape, the inner part of the wear-resistant block (701b) is a hollow channel, the inner diameter of the wear-resistant block corresponds to the outer diameter of the main body of the rotating shaft (701c), a first lug (701b-1) and a second lug (701b-2) which correspond to the first groove (701c-1) and the second groove (701c-2) are arranged on the inner side wall of the wear-resistant block (701b), the size and the structure of the first lug (701b-1) and the size and the structure of the second lug (701b-2) are respectively matched with the first groove (701c-1) and the second groove (701 c-2);

the wear-resistant block (701b) is arranged on the elastic damping block (701a) in a penetrating mode, one side face of the elastic damping block (701a) is fixed to the side edge of the first limiting piece (101) and provided with an upward opening, the opening corresponds to the outer diameter of the main body of the wear-resistant block (701b), a plurality of damping protrusions (701a-1) are arranged on the inner side wall of the elastic damping block (701a), the damping protrusions (701a-1) are strip-shaped protrusions which are arranged at equal intervals along the longitudinal direction of the elastic damping block (701a), correspondingly, a first damping strip (701b-3) and a second damping strip (701b-4) are arranged on the outer side surface of the wear-resistant block (701b), the first damping strip (701b-3) and the second damping strip (701b-4) are strip-shaped high-strength wear-resistant protrusions, and the first damping strip (701b-3) and the second damping strip-4) are oppositely arranged on the outer side surface of the wear-, the widths of the first damping strips (701b-3) and the second damping strips (701b-4) are smaller than the distance between any two adjacent damping protrusions (701a-1) so as to ensure that when the wear-resistant block (701b) is inserted into the opening of the elastic damping block (701a), the first damping strips (701b-3) and the second damping strips (701b-4) can be embedded into the gaps between the damping protrusions (701a-1), and when the door panel (702) integrally rotates around the rotating shaft (701c) and drives the wear-resistant block (701b) to rotate, the first damping strips (701b-3) and the second damping strips (701b-4) on the wear-resistant block (701b) are in a discontinuous interval motion state due to the blocking effect of the densely distributed damping protrusions (701a-1), and resistance action exists all the time in the rotating process.

2. A foldable dual heat dissipating switchgear as claimed in claim 1 wherein: the first limiting part (101) and the second limiting part (102) are corresponding to each other in overall structure, are vertically arranged and are parallel to each other.

3. A foldable dual heat dissipating switchgear as claimed in claim 2 wherein: the side edges of the first matching piece (P-1) and the second matching piece (P-2) are provided with positioning seams (F) matched with the clamping piece (402).

4. A foldable dual heat dissipating switchgear as claimed in claim 3 wherein: one end of the first spacing part (301) connected with the first limiting part (101) is provided with a connecting part (L), and the other end is provided with a third fitting part (P-3);

one end of the second separator (302) connected with the second limiting piece (102) is provided with a connecting piece (L), and the other end is provided with a fourth matching piece (P-4);

the third fitting part (P-3) and the fourth fitting part (P-4) are correspondingly matched with each other and hinged through a connecting shaft (Z).

5. A foldable dual heat dissipating switchgear as claimed in claim 4 wherein: the inner side surfaces of the first limiting piece (101) and the second limiting piece (102) are provided with convex pieces (W) connected with the connecting piece (L).