CN213366809U

CN213366809U - Copper bar connecting mechanism for connecting copper stranded wires

Info

Publication number: CN213366809U
Application number: CN202022215330.6U
Authority: CN
Inventors: 周建斌; 钱列友
Original assignee: Chengdu Rester Technology Co ltd
Current assignee: Chengdu Rester Technology Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-06-04
Anticipated expiration: 2030-09-29

Abstract

The utility model provides a copper bar coupling mechanism for connecting copper strands usefulness belongs to electrically conductive technical field. The copper bar connecting mechanism for connecting the copper stranded wires comprises a fixing component and a copper bar component, wherein the fixing component comprises a bottom plate, a first clamping plate, a second clamping plate, an extrusion plate, a first threaded rod, a limiting rod, a top plate, a second threaded rod and a third threaded rod, the second threaded rod and the third threaded rod drive the first clamping plate and the second clamping plate to simultaneously and oppositely move until the first clamping plate and the second clamping plate are jointed with the two sides of the first copper bar body and the second copper bar body, then the first threaded rod is rotated to drive the extrusion plate to move downwards so as to extrude the first copper bar body and the second copper bar body, and then fix first copper bar body and second copper bar body together, need not to set up the screw hole to the copper bar again, can not increase the resistance of copper bar, and then make the less transport that is favorable to the electric energy of the internal loss of electric energy.

Description

Copper bar connecting mechanism for connecting copper stranded wires

Technical Field

The utility model relates to an electrically conductive field particularly, relates to a copper bar coupling mechanism for connecting copper strands usefulness. A copper bar connecting mechanism for connecting copper stranded wires.

Background

In the defeated change of electric power, especially, the transport of heavy current, it carries to use copper strands and electrician's copper bar to mutually support more, wherein it is comparatively more common with the use mode that the copper bar links to each other in order to reduce two copper strand wires junction resistance to use the copper bar between two copper strands, and the copper bar can cause certain electric energy loss because self resistance reason in the use, and in the overlap joint of some copper bars, one nevertheless be connected insecure between copper bar and the copper bar, will cause the effective area of contact between two copper bars to reduce, area of contact's reduction can cause the resistance increase between two copper bars.

A plurality of screw holes are all seted up with the junction of two copper bars mostly to the connected mode between current copper bar and the copper bar, then pass the screw hole with fastening bolt and be in the same place two copper bars are fixed, and because the texture of copper is softer so fastening bolt can't use by copper become fastening bolt, nevertheless carry out the resistance grow that the trompil can directly lead to the copper bar, therefore can make the resistance grow of copper bar, and then make the internal loss grow that electric energy is unfavorable for the transport of electric energy.

SUMMERY OF THE UTILITY MODEL

In order to compensate above not enough, the utility model provides a copper bar coupling mechanism for connecting copper strands usefulness aims at improving the problem that the internal loss grow of electric energy is unfavorable for electric energy to carry.

The utility model discloses a realize like this:

the utility model provides a copper bar coupling mechanism for connecting copper strands usefulness, including fixed subassembly and copper bar subassembly.

The fixing component comprises a bottom plate, a first clamping plate, a second clamping plate, an extrusion plate, a first threaded rod, a limiting rod, a top plate, a second threaded rod and a third threaded rod, the second threaded rod is rotatably connected to one side of the upper surface of the bottom plate, the bottom surface of the first clamping plate is attached to the upper surface of the bottom plate, the bottom surface of the first clamping plate is in threaded connection with a rod body of the second threaded rod, the third threaded rod is rotatably connected to the other side of the upper surface of the bottom plate, the bottom surface of the second clamping plate is attached to the upper surface of the bottom plate, the bottom surface of the second clamping plate is in threaded connection with a rod body of the third threaded rod, the top surface of the first clamping plate is in sliding clamping connection with the bottom surface of the top plate, the top surface of the second clamping plate is in sliding clamping connection with the bottom surface of the top plate, the extrusion plate is located between the first clamping plate and the second clamping plate, and the, the bottom of first threaded rod with the upper surface of stripper plate rotates and is connected, the bottom of gag lever post slide run through in the plate body of roof, the bottom of gag lever post with stripper plate fixed connection.

The copper bar assembly comprises a first copper bar body and a second copper bar body, and the end portions of the first copper bar body and the second copper bar body are located between the first clamping plate and the second clamping plate.

The utility model discloses an in one embodiment, first spout has been seted up at the center of bottom plate upper surface one side, first louvre has been seted up to the plate body of bottom plate, first louvre is provided with a plurality of, the second threaded rod rotate run through in the inside of first spout, the one end of second threaded rod with one side of first spout is rotated and is connected.

In an embodiment of the present invention, the second threaded rod is far away from one end of the first chute is connected to a first rotating handwheel, and one side of the first rotating handwheel is connected to a first rotating handle.

The utility model discloses an in one embodiment, the first slider of central fixedly connected with of first splint bottom surface, first slider slide in the inside of first spout, first slider screw thread cup joint in the body of rod of second threaded rod, first waist type groove has been seted up to the plate body of first splint, a plurality of has been seted up in first waist type groove.

In an embodiment of the present invention, a second sliding groove is formed in the center of the other side of the upper surface of the bottom plate, the third threaded rod is rotated to run through the inside of the second sliding groove, and one end of the third threaded rod is rotatably connected to one end of the second sliding groove.

In an embodiment of the present invention, the third threaded rod is far away from one end of the second chute is connected to a second rotating handwheel, and one side of the second rotating handwheel is connected to a second rotating handle.

The utility model discloses an in one embodiment, the central fixedly connected with second slider of second splint bottom surface, the second slider slide in the inside of second spout, second slider screw thread cup joint in the body of rod of third threaded rod, second waist type groove has been seted up to the plate body of second splint, a plurality of has been seted up in second waist type groove.

The utility model discloses an in an embodiment, the draw-in groove has all been seted up to the both sides at roof lower surface center, first splint with the center of second splint top surface all is connected with the fixture block, two the fixture block slides respectively and connects in twice the inside of draw-in groove.

In an embodiment of the present invention, the first threaded rod top surface is connected to a third rotating handwheel, and a third rotating handle is provided on the top surface of the third rotating handwheel.

The utility model discloses an in the embodiment, the lower surface of stripper plate is connected with the rubber pad, the plate body of stripper plate with the second louvre has all been seted up to the pad body of rubber pad, two the second louvre is linked together, a plurality of has all been seted up to the second louvre.

The utility model has the advantages that: the utility model discloses a copper bar coupling mechanism for connecting copper strands that obtains through above-mentioned design, when using, insert the one end of first copper bar body and second copper bar body all into first splint and second splint and squeeze plate and bottom plate between, and make first copper bar body and second copper bar body place from top to bottom, then rotate second threaded rod and third threaded rod simultaneously, make second threaded rod and third threaded rod drive first splint and second splint and move towards each other simultaneously, until first splint and second splint and the first copper bar body and the both sides of second copper bar body are laminated mutually, then rotate first threaded rod, make first threaded rod drive the squeeze plate and move down, and then extrude first copper bar body and second copper bar body, and then fix first copper bar body and second copper bar body together, need not to set up the copper bar screw hole again, the resistance of the copper bar can not be increased, and the internal loss of the electric energy is smaller, so that the electric energy is conveyed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a first view structure of a copper bar connecting mechanism for connecting copper stranded wires according to an embodiment of the present invention;

fig. 2 is a schematic view of a second perspective cross-sectional structure of a copper bar connecting mechanism for connecting copper stranded wires according to an embodiment of the present invention;

fig. 3 is a schematic view of a first view angle structure of a fixing assembly according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a first view angle of a fixing assembly according to an embodiment of the present invention;

fig. 5 is a schematic view of a second perspective cross-sectional structure of the fixing assembly according to an embodiment of the present invention.

In the figure: 100-a stationary component; 110-a base plate; 111-a first runner; 112-a first heat dissipation hole; 113-a second chute; 120-a first splint; 121-a first slider; 122-first waist-shaped groove; 123-fixture block; 130-a second splint; 131-a second slider; 132-a second waist-shaped groove; 140-a stripper plate; 141-a rubber pad; 142-a second louver; 150-a first threaded rod; 151-third rotating handwheel; 152-a third rotating handle; 160-a limiting rod; 170-top plate; 171-card slot; 180-a second threaded rod; 181-first rotating handwheel; 182-a first rotating handle; 190-a third threaded rod; 191-a second rotating handwheel; 192-a second rotating handle; 200-copper bar assembly; 210-a first copper bar body; 220-second copper bar body.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but 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 should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1, the present invention provides a copper bar connecting mechanism for connecting a copper stranded wire, which includes a fixing assembly 100 and a copper bar assembly 200.

Wherein, the copper bar assembly 200 is located inside the fixing assembly 100, and the fixing assembly 100 is used for fixing the copper bar assembly 200.

Referring to fig. 1-5, the fixing assembly 100 includes a bottom plate 110, a first clamping plate 120, a second clamping plate 130, a pressing plate 140, a first threaded rod 150, a limiting rod 160, a top plate 170, a second threaded rod 180, and a third threaded rod 190, wherein a first heat dissipation hole 112 is formed in a plate body of the bottom plate 110, the first heat dissipation hole 112 is used for dissipating heat, a plurality of first heat dissipation holes 112 are formed in the first heat dissipation hole 112, the heat dissipation effect is enhanced by the plurality of first heat dissipation holes 112, the second threaded rod 180 is rotatably connected to one side of the upper surface of the bottom plate 110, a first sliding groove 111 is formed in the center of one side of the upper surface of the bottom plate 110, the second threaded rod 180 rotatably penetrates through the first sliding groove 111, one end of the second threaded rod 180 is rotatably connected to one side of the first sliding groove 111, the second threaded rod 180 is rotatably connected to the bottom plate 110 through a bearing, one, one side of first rotatory hand disc 181 is connected with first twist grip 182, first rotatory hand disc 181 and first twist grip 182 mean square just that the workman rotates second threaded rod 180, it is comparatively convenient to make use, the bottom surface of first splint 120 laminates with the upper surface of bottom plate 110 mutually, can prevent that first splint 120 is rotatory, the body of rod threaded connection of the bottom surface of first splint 120 and second threaded rod 180, the first slider 121 of central fixedly connected with in the bottom surface of first splint 120, first slider 121 slides in the inside of first spout 111, first slider 121 screw thread cup joints in the body of rod of second threaded rod 180, rotatory second threaded rod 180 alright drive first splint 120 and remove, first waist type groove 122 has been seted up to the plate body of first splint 120, first waist type groove 122 has seted up a plurality of, first waist type groove 122 is used for ventilation and heat dissipation, make the radiating effect of fixed subassembly 100 better.

In this embodiment, the third threaded rod 190 is rotatably connected to the other side of the upper surface of the bottom plate 110, the second sliding slot 113 is formed in the center of the other side of the upper surface of the bottom plate 110, the third threaded rod 190 is rotatably inserted into the second sliding slot 113, one end of the third threaded rod 190 is rotatably connected to one end of the second sliding slot 113, one end of the third threaded rod 190 is rotatably connected to the bottom plate 110 through a bearing, one end of the third threaded rod 190, which is away from the second sliding slot 113, is connected to the second rotary hand plate 191, one side of the second rotary hand plate 191 is connected to the second rotary handle 192, the second rotary hand plate 191 and the second rotary handle 192 allow a worker to rotate the third threaded rod 190, so that the fixing assembly 100 is convenient to use, the bottom surface of the second clamping plate 130 is attached to the upper surface of the bottom plate 110 to prevent the second clamping plate 130 from rotating, the bottom surface of the second clamping plate 130, the center fixedly connected with second slider 131 of second splint 130 bottom surface, second slider 131 slides in the inside of second spout 113, and the body of rod of third threaded rod 190 is cup jointed in the second slider 131 screw thread, and rotatory third threaded rod 190 just can drive second splint 130 and remove, and second waist type groove 132 has been seted up to the plate body of second splint 130, and a plurality of has been seted up to second waist type groove 132, and second waist type groove 132 is used for ventilation cooling for fixed subassembly 100's radiating effect is better.

In the application, the top surface of the first clamping plate 120 is slidably clamped with the bottom surface of the top plate 170, the top surface of the second clamping plate 130 is slidably clamped with the bottom surface of the top plate 170, the two sides of the center of the lower surface of the top plate 170 are both provided with clamping grooves 171, the centers of the top surfaces of the first clamping plate 120 and the second clamping plate 130 are both connected with clamping blocks 123, the two clamping blocks 123 are respectively slidably clamped inside the two clamping grooves 171, the top plate 170 can be prevented from being separated from the first clamping plate 120 and the second clamping plate 130, so that the stability is good, the extrusion plate 140 is positioned between the first clamping plate 120 and the second clamping plate 130, the bottom end thread of the first threaded rod 150 penetrates through the plate body of the top plate 170, the bottom end of the first threaded rod 150 is rotatably connected with the upper surface of the extrusion plate 140 through a bearing, the top surface of the first threaded rod, third swivel hand disc 151 and third twist grip 152 are convenient for workman's rotatory first threaded rod 150, make fixed subassembly 100's use comparatively convenient, the bottom of gag lever post 160 slides and runs through in the plate body of roof 170, the bottom and the stripper plate 140 fixed connection of gag lever post 160, prevent that stripper plate 140 is rotatory, rotatory first threaded rod 150 alright drive stripper plate 140 and reciprocate, stripper plate 140's lower surface is connected with rubber pad 141, second louvre 142 has all been seted up to stripper plate 140's plate body and the cushion body of rubber pad 141, two second louvre 142 are linked together, a plurality of has all been seted up to second louvre 142, second louvre 142 is used for the heat dissipation, make fixed subassembly 100's radiating effect better.

Specifically, the bottom plate 110, the first clamping plate 120, the second clamping plate 130, the pressing plate 140, the first threaded rod 150, the limiting rod 160, the top plate 170, the second threaded rod 180, and the third threaded rod 190 may be made of silicon nitride ceramics having good insulation properties, and the ceramics may have high strength and hardness while having good insulation properties, or may be made of other materials having good insulation properties and high strength and hardness.

Referring to fig. 1 to 5, the copper bar assembly 200 includes a first copper bar body 210 and a second copper bar body 220, wherein the ends of the first copper bar body 210 and the second copper bar body 220 are both located between the first clamping plate 120 and the second clamping plate 130, the ends of the first copper bar body 210 and the second copper bar body 220 are both located between the pressing plate 140 and the bottom plate 110, one end of the first copper bar body 210 and one end of the second copper bar body 220 are both inserted between the first clamping plate 120 and the second clamping plate 130, and between the pressing plate 140 and the bottom plate 110, and the first copper bar body 210 and the second copper bar body 220 are both placed up and down, and then the second threaded rod 180 and the third threaded rod 190 are simultaneously rotated, so that the second threaded rod 180 and the third threaded rod 190 drive the first clamping plate 120 and the second clamping plate 130 to simultaneously and oppositely move until the first clamping plate 120 and the second clamping plate 130 are attached to the two sides of the first copper bar body 210 and the second copper bar body, therefore, the first copper bar body 210 and the second copper bar body 220 can be prevented from being dislocated, then the first threaded rod 150 is rotated, the first threaded rod 150 drives the pressing plate 140 to move downwards, the first copper bar body 210 and the second copper bar body 220 are further pressed, the first copper bar body 210 and the second copper bar body 220 are further fixed together, the rubber pad 141 connected to the lower surface of the pressing plate 140 is used for preventing the pressing plate 140 from being in direct contact with the second copper bar body 220, the situation that the surface of the second copper bar body 220 is crushed by the pressing plate 140 can be prevented from occurring, the first heat dissipation hole 112, the first waist-shaped groove 122, the second waist-shaped groove 132 and the second heat dissipation hole 142 can dissipate heat at the joint between the first copper bar body 210 and the second copper bar body 220, and the current loss caused by resistance heat can be effectively reduced.

Specifically, this a copper bar coupling mechanism for connecting copper strand wires usefulness's theory of operation: when the copper bar pressing device is used, one ends of the first copper bar body 210 and the second copper bar body 220 are inserted into the first clamping plate 120 and the second clamping plate 130 and between the pressing plate 140 and the bottom plate 110, the first copper bar body 210 and the second copper bar body 220 are placed up and down, then the second threaded rod 180 and the third threaded rod 190 are simultaneously rotated, the second threaded rod 180 and the third threaded rod 190 drive the first clamping plate 120 and the second clamping plate 130 to simultaneously and oppositely move until the first clamping plate 120 and the second clamping plate 130 are attached to two sides of the first copper bar body 210 and the second copper bar body 220, then the first threaded rod 150 is rotated, the first threaded rod 150 drives the pressing plate 140 to downwards move, the first copper bar body 210 and the second copper bar body 220 are pressed, the first copper bar body 210 and the second copper bar body 220 are fixed together, no threaded hole needs to be formed in the copper bar, and the resistance of the copper bar cannot be increased, and further, the internal loss of the electric energy is smaller, and the electric energy is favorably transmitted.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A copper bar coupling mechanism for connecting copper strands usefulness, its characterized in that includes

A fixing component (100), the fixing component (100) comprises a bottom plate (110), a first clamping plate (120), a second clamping plate (130), an extrusion plate (140), a first threaded rod (150), a limiting rod (160), a top plate (170), a second threaded rod (180) and a third threaded rod (190), the second threaded rod (180) is rotatably connected to one side of the upper surface of the bottom plate (110), the bottom surface of the first clamping plate (120) is attached to the upper surface of the bottom plate (110), the bottom surface of the first clamping plate (120) is in threaded connection with the rod body of the second threaded rod (180), the third threaded rod (190) is rotatably connected to the other side of the upper surface of the bottom plate (110), the bottom surface of the second clamping plate (130) is attached to the upper surface of the bottom plate (110), the bottom surface of the second clamping plate (130) is in threaded connection with the rod body of the third threaded rod (190), the top surface of the first clamping plate (120) is in sliding clamping connection with the bottom surface of the top plate (170), the top surface of the second clamping plate (130) is in sliding clamping connection with the bottom surface of the top plate (170), the extrusion plate (140) is located between the first clamping plate (120) and the second clamping plate (130), the bottom end of the first threaded rod (150) penetrates through a plate body of the top plate (170), the bottom end of the first threaded rod (150) is rotatably connected with the upper surface of the extrusion plate (140), the bottom end of the limiting rod (160) penetrates through the plate body of the top plate (170) in a sliding mode, and the bottom end of the limiting rod (160) is fixedly connected with the extrusion plate (140);

copper bar subassembly (200), copper bar subassembly (200) include first copper bar body (210) and second copper bar body (220), first copper bar body (210) with the tip of second copper bar body (220) all is located between first splint (120) and second splint (130).

2. The copper bar connecting mechanism for connecting copper stranded wires according to claim 1, wherein a first sliding groove (111) is formed in the center of one side of the upper surface of the bottom plate (110), a first heat dissipation hole (112) is formed in the plate body of the bottom plate (110), a plurality of first heat dissipation holes (112) are formed in the first heat dissipation hole, the second threaded rod (180) rotatably penetrates through the first sliding groove (111), and one end of the second threaded rod (180) is rotatably connected with one side of the first sliding groove (111).

3. The copper bar connecting mechanism for connecting copper strands as claimed in claim 2, wherein one end of the second threaded rod (180) far away from the first sliding groove (111) is connected with a first rotating hand disc (181), and one surface of the first rotating hand disc (181) is connected with a first rotating handle (182).

4. The copper bar connecting mechanism for connecting copper strands according to claim 2, wherein a first slider (121) is fixedly connected to a center of a bottom surface of the first clamping plate (120), the first slider (121) slides inside the first sliding groove (111), the first slider (121) is sleeved on a rod body of the second threaded rod (180) in a threaded manner, a first waist-shaped groove (122) is formed in a plate body of the first clamping plate (120), and a plurality of first waist-shaped grooves (122) are formed in the first waist-shaped groove (122).

5. The copper bar connecting mechanism for connecting copper stranded wires according to claim 1, wherein a second sliding groove (113) is formed in the center of the other side of the upper surface of the bottom plate (110), the third threaded rod (190) is rotatably inserted into the second sliding groove (113), and one end of the third threaded rod (190) is rotatably connected with one end of the second sliding groove (113).

6. The copper bar connecting mechanism for connecting copper strands as claimed in claim 5, wherein a second rotating hand disc (191) is connected to one end of the third threaded rod (190) far away from the second sliding groove (113), and a second rotating handle (192) is connected to one side of the second rotating hand disc (191).

7. The copper bar connecting mechanism for connecting copper strands according to claim 5, wherein a second slider (131) is fixedly connected to a center of a bottom surface of the second clamping plate (130), the second slider (131) slides inside the second sliding groove (113), the second slider (131) is sleeved on a rod body of the third threaded rod (190) in a threaded manner, a second waist-shaped groove (132) is formed in a plate body of the second clamping plate (130), and a plurality of second waist-shaped grooves (132) are formed in the second waist-shaped groove (132).

8. The copper bar connecting mechanism for connecting copper strands as claimed in claim 1, wherein clamping grooves (171) are formed in both sides of the center of the lower surface of the top plate (170), clamping blocks (123) are connected to the centers of the top surfaces of the first clamping plate (120) and the second clamping plate (130), and the two clamping blocks (123) are slidably clamped in the two clamping grooves (171) respectively.

9. The copper bar connecting mechanism for connecting copper stranded wires is characterized in that a third rotating hand disc (151) is connected to the top surface of the first threaded rod (150), and a third rotating handle (152) is arranged on the top surface of the third rotating hand disc (151).

10. The copper bar connecting mechanism for connecting copper stranded wires according to claim 1, wherein a rubber pad (141) is connected to the lower surface of the extrusion plate (140), second heat dissipation holes (142) are formed in the plate body of the extrusion plate (140) and the pad body of the rubber pad (141), two of the second heat dissipation holes (142) are communicated, and a plurality of the second heat dissipation holes (142) are formed in the second heat dissipation holes (142).