CN114655067A

CN114655067A - Quick replacement device of new energy automobile battery

Info

Publication number: CN114655067A
Application number: CN202210474275.3A
Authority: CN
Inventors: 张强; 雷学鹏; 李贵麒
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-06-24

Abstract

The invention relates to the technical field of new energy automobile batteries, in particular to a quick replacement device for a new energy automobile battery, which comprises: the battery comprises five batteries, a first placing groove is formed in the top of the connecting plate, the batteries are located in an inner cavity of the first placing groove and movably connected with the first placing groove, a cavity is formed in the connecting plate, a heat dissipation structure is arranged in the cavity and comprises a heat conduction silica gel gasket fixedly connected with the cavity, the bottom of the heat conduction silica gel gasket is fixedly connected with heat radiating fins, and the bottom of the heat radiating fins is fixedly connected with heat conducting fins. In the actual use process, the battery is connected between the connecting plate and the top plate firstly, and then the battery and the bottom plate are quickly fixed through the simple fixing structure, so that the operation is simple and convenient, the time is saved, meanwhile, the battery is not easy to collide, and the loss of the battery is further reduced.

Description

Quick replacement device of new energy automobile battery

Technical Field

The invention relates to the technical field of new energy automobile batteries, in particular to a quick replacement device for a new energy automobile battery.

Background

The new energy battery is a power battery, the power battery is a power supply for providing a power source for tools, and the new energy battery is a storage battery for providing power for electric automobiles, electric trains, electric bicycles and golf carts.

The utility model discloses a new energy automobile's quick battery replacement device that publication number is CN 215944346U, the beneficial effect that this application was realized is through setting up the conveyer belt, the fixed box, electric telescopic handle, electro-magnet and limiting plate, in using, open electric telescopic handle, electric telescopic handle drives the direction removal of electro-magnet to car storage battery, disassemble the bolt of messenger's old battery to the car bottom with the wind, then electric telescopic handle drives old battery and moves down, put old battery on the conveyer belt of left side, make old battery remove in the storing box, electric telescopic handle sends the battery to the battery of car bottom after that and places the district, thereby accomplish the change to the battery, so not only can improve the speed that the battery changed, can also increase the degree of automation of device.

At first it utilizes a large amount of conveyer to shift the battery, carry, realize the change at last, though realized automation mechanized operation, the loaded down with trivial details complicacy of process, and control the process also comparatively lengthy, though reduced user's working strength, but prolonged operating time, comparatively down, still do not improve the speed of trading of car battery, user's use convenience has been reduced, secondly, car battery lacks heat radiation structure, or existing heat radiation structure designs comparatively loaded down with trivial details, not only can not reach better radiating effect, still can increase the heat dissipation burden of battery, generally speaking, the radiating effect is not good.

Therefore, a quick replacement device for a new energy automobile battery is urgently needed to solve the problems.

Disclosure of Invention

The invention aims to provide a quick replacement device for a new energy automobile battery, which has the advantages of convenience in installation and good heat dissipation effect and solves the problems in the background technology.

In order to achieve the above purpose, the invention provides the following technical scheme: a quick replacement device for a new energy automobile battery comprises: the battery comprises five batteries and connecting plates, wherein the top of each connecting plate is provided with a first placing groove, each battery is positioned in an inner cavity of the first placing groove and is movably connected with the first placing groove, the inside of each connecting plate is provided with a cavity, the inside of each cavity is provided with a heat dissipation structure, each heat dissipation structure comprises a heat conduction silica gel gasket fixedly connected with the corresponding cavity, the bottom of each heat conduction silica gel gasket is fixedly connected with a heat dissipation fin, the bottom of each heat dissipation fin is fixedly connected with a heat conduction fin, the bottom of each heat conduction fin is fixedly connected with the corresponding cavity, two sides of the inner cavity of each cavity are respectively provided with a plurality of fixing grooves which are distributed at equal intervals, one side of the inner cavity of each fixing groove is fixedly connected with a motor, an output shaft of each motor is fixedly connected with a heat dissipation fan, the front side and the rear side of each connecting plate are respectively provided with a plurality of first ventilation holes which are distributed at equal intervals, and the top of each connecting plate is provided with a plurality of second ventilation holes which are distributed at equal intervals, the vent hole is positioned between the two batteries;

the locking device is characterized in that locking blocks are fixedly connected to four corners of the bottom of the connecting plate, a bottom plate is arranged at the bottom of the connecting plate, vertical grooves matched with the locking blocks are formed in the four corners of the top of the bottom plate, transverse grooves are formed in the bottom plate, the vertical grooves are communicated with the transverse grooves, and mounting structures are arranged in inner cavities of the transverse grooves.

Further, as a preferable aspect of the present invention, the mounting structure includes a fixing rod fixedly connected to the transverse groove, the bottom of the locking block is provided with a clamping groove matched with the fixed rod, the surface of the fixed rod is connected with a connecting lug boss in a sliding way, the two sides of the surface of the fixed rod are both provided with sliding chutes, the inner cavities of the sliding chutes are connected with locking blocks in a sliding way, one side of the locking block, which is far away from the sliding groove, is fixedly connected with the connecting lug boss, the two sides of the inner cavity of the clamping groove are respectively provided with a locking groove matched with the locking block, a spring is sleeved on one side of the surface of the fixed rod, two ends of the spring are respectively and fixedly connected with the connecting boss and the fixed rod, one side fixedly connected with transmission boss on connection boss surface, the front side of transmission boss runs through to the outside of bottom plate, the surface of bottom plate is seted up with the standing groove two of transmission boss looks adaptation.

Further, as a preferred option of the invention, a top plate is arranged at the top of the battery, two symmetrically arranged fixed blocks are fixedly connected to both sides of the connecting plate, a vertical rod is fixedly connected to the top of the fixed block, a sealing ring is fixedly connected to the upper part of the surface of the vertical rod, and a connecting hole matched with the sealing ring is formed in the bottom of the top plate; the top of the top plate is provided with heat dissipation holes, and filter screens are filled in the inner cavities of the heat dissipation holes.

Further, as a preferred mode of the invention, the bottom of the connecting plate is provided with a groove, the top of the bottom plate is fixedly connected with a plurality of aluminum plates which are distributed at equal intervals, and the tops of the aluminum plates are in contact with the groove.

Further, as a preferable mode of the invention, a plurality of ventilation grooves distributed at equal intervals are formed on two sides of the aluminum plate.

Further, as a preferable mode of the present invention, the inner cavity of the cavity is coated with an insulating coating.

Further, as a preferable mode of the present invention, the top of the heat dissipation plate is provided with a plurality of heat dissipation grooves distributed at equal intervals, and the shape of the heat dissipation grooves is "S" shape.

Further, as a preferable aspect of the present invention, the surface of the fixing rod is smooth.

Further, as a preferable aspect of the present invention, the connection boss is T-shaped, and a side area close to the spring is large.

Further, as a preferred option of the invention, a round hole is formed in the front side of the transmission boss, a vertical plate is fixedly connected to an inner cavity of the round hole, and anti-skid grains are arranged on two sides of the vertical plate.

The beneficial effects are that the technical scheme of this application possesses following technological effect:

1. according to the invention, through the matched use of the connecting plate, the first placing groove, the cavity and the heat dissipation structure, the heat generated during the operation of the battery is absorbed and conducted and volatilized, and the battery is further subjected to the effects of heat dissipation and temperature reduction.

2. In the actual use process, the battery is connected between the connecting plate and the top plate by placing the battery between the connecting plate and the top plate, and then the battery and the bottom plate are quickly fixed by a simple fixing structure, so that the operation is simple and convenient, the time is saved, the battery is not easy to collide, and the loss of the battery is further reduced; secondly, when the battery began the operation, application heat radiation structure carried out heat conduction to it to volatilize the absorbed heat to the air through ventilation hole one and ventilation hole two, realize the exchange of inside and outside cold and hot air, thereby reach the purpose of heat dissipation cooling, further kept the steady operation of battery, solved the problem that above-mentioned background art provided.

It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a perspective view of the battery, the connecting plate and the bottom plate of the present invention in a disassembled state;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic view of a disassembled three-dimensional structure of the connection board and the heat dissipation structure of the present invention;

FIG. 5 is an enlarged view of a portion B of FIG. 4 in accordance with the present invention;

FIG. 6 is a schematic perspective view of the connecting plate of the present invention;

FIG. 7 is an enlarged view of a portion of C of FIG. 6 in accordance with the present invention;

FIG. 8 is a schematic perspective view of the locking block and the mounting structure of the present invention in a disassembled state;

fig. 9 is a schematic perspective view of the mounting structure of the present invention in a disassembled state.

In the figures, the meaning of the reference numerals is as follows: 1. a battery; 2. a connecting plate; 3. placing the first groove; 4. a cavity; 5. a heat dissipation structure; 51. a heat-conducting silica gel gasket; 52. a heat sink; 53. a heat conductive sheet; 54. fixing grooves; 55. a motor; 56. a heat radiation fan; 57. a first ventilation hole; 58. a second air vent; 6. a locking block; 7. a base plate; 8. a vertical slot; 9. a transverse groove; 10. a mounting structure; 101. fixing the rod; 102. a card slot; 103. connecting the bosses; 104. a chute; 105. a locking block; 106. a spring; 107. a transmission boss; 108. a second placing groove; 109. a locking groove; 11. a top plate; 12. a fixed block; 13. a vertical rod; 14. a seal ring; 15. connecting holes; 16. a groove; 17. an aluminum plate; 18. a heat sink; 19. a circular hole; 20. a vertical plate; 21. and (4) heat dissipation holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and in order to better understand the technical contents of the present invention, specific embodiments will be described below with reference to the accompanying drawings. In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in figures 1 to 9: the embodiment provides a quick replacement device of new energy automobile battery, includes: the battery comprises batteries 1 and connecting plates 2, the number of the batteries 1 is five, a placing groove I3 is arranged at the top of the connecting plate 2, the batteries 1 are positioned in an inner cavity of the placing groove I3 and movably connected with the placing groove I3, a cavity 4 is arranged inside the connecting plate 2, a heat dissipation structure 5 is arranged inside the cavity 4, the heat dissipation structure 5 comprises a heat conduction silica gel gasket 51 fixedly connected with the cavity 4, a heat dissipation fin 52 is fixedly connected with the bottom of the heat conduction silica gel gasket 51, a heat conduction fin 53 is fixedly connected with the bottom of the heat dissipation fin 52, the bottom of the heat conduction fin 53 is fixedly connected with the cavity 4, a plurality of fixing grooves 54 which are distributed at equal intervals are arranged on both sides of the inner cavity of the cavity 4, a motor 55 is fixedly connected with one side of the inner cavity of the fixing grooves 54, a heat dissipation fan 56 is fixedly connected with an output shaft of the motor 55, a plurality of vent holes 57 which are distributed at equal intervals are arranged on both the front side and the rear side of the connecting plate 2, a plurality of vent holes 58 which are distributed at equal intervals are arranged on the top of the connecting plate 2, the second vent 58 is located between the two batteries 1.

The four corners of the bottom of the connecting plate 2 are fixedly connected with locking blocks 6, the bottom of the connecting plate 2 is provided with a bottom plate 7, the four corners of the top of the bottom plate 7 are respectively provided with a vertical groove 8 matched with the locking blocks 6, the inside of the bottom plate 7 is provided with a transverse groove 9, the vertical grooves 8 are communicated with the transverse grooves 9, the inner cavity of the transverse grooves 9 is provided with a mounting structure 10, the mounting structure 10 comprises a fixed rod 101 fixedly connected with the transverse grooves 9, the bottom of the locking block 6 is provided with a clamping groove 102 matched with the fixed rod 101, the surface of the fixed rod 101 is slidably connected with a connecting boss 103, two sides of the surface of the fixed rod 101 are respectively provided with a sliding groove 104, the inner cavity of the sliding groove 104 is slidably connected with a locking block 105, one side of the locking block 105 far away from the sliding groove 104 is fixedly connected with the connecting boss 103, two sides of the inner cavity of the clamping groove 102 are respectively provided with a locking groove 109 matched with the locking block 105, one side of the surface of the fixed rod 101 is sleeved with a spring 106, the both ends of spring 106 respectively with connect boss 103 and dead lever 101 fixed connection, connect one side fixedly connected with transmission boss 107 on boss 103 surface, the front side of transmission boss 107 runs through to the outside of bottom plate 7, the surface of bottom plate 7 is seted up with the standing groove two 108 of transmission boss 107 looks adaptation.

Specifically, the top of battery 1 is provided with roof 11, the fixed block 12 that two symmetries of the equal fixedly connected with in both sides of connecting plate 2 set up, the top fixedly connected with montant 13 of fixed block 12, the top fixedly connected with sealing washer 14 on montant 13 surface, roof 11's bottom seted up with the connecting hole 15 of 14 looks adaptations of sealing washer.

In this embodiment: through the cooperation of roof 11, fixed block 12, montant 13, sealing washer 14 and connecting hole 15 use, played and after placing battery 1 in standing groove 3 inner chambers, made the top and the bottom of battery 1 form wholly, carried out the effect of first step encapsulation to battery 1.

Specifically, louvre 21 has been seted up at the top of roof 11, and louvre 21's inner chamber is filled there is the filter screen.

In this embodiment: through the setting of louvre 21, played the top heat conduction of battery 1, carried out supplementary radiating effect.

Specifically, the bottom of connecting plate 2 is seted up flutedly 16, and the top fixedly connected with of bottom plate 7 a plurality of equidistant aluminum plate 17 that distribute, aluminum plate 17's top and recess 16 contact.

In this embodiment: through recess 16 and aluminum plate 17's cooperation use, played at first reduce the area of contact between connecting plate 2 bottom and the bottom plate 7 to lead to aluminum plate 17 and absorb the heat, further accelerate radiating efficiency's effect.

Specifically, a plurality of ventilation grooves distributed at equal intervals are formed on two sides of the aluminum plate 17.

In this embodiment: through the setting of ventilation slot, played the area of contact that increases aluminium plate 17 surface and air, made the heat radiating area who flows between air and the aluminium plate 17 enlarge to take away more heats, further improve radiating rate's effect.

Specifically, the inner cavity of the cavity 4 is coated with an insulating coating.

In this embodiment: through the setting of insulating picture layer, played the thermal resistance that reduces between battery 1 and the connecting plate 2, can not only avoid the emergence of electric leakage incident, utilize its good heat conductivity simultaneously, further improve the effect of radiating effect.

Specifically, the top of the heat sink 52 is provided with a plurality of heat dissipation grooves 18 distributed at equal intervals, and the heat dissipation grooves 18 are S-shaped.

In this embodiment: the arrangement of the heat dissipation grooves 18 plays a role in increasing the distance that the cold air flows on the surface of the heat dissipation fins 52, and ensuring that the cold air can exchange with more hot air.

Specifically, the surface of the fixing lever 101 is smooth.

In this embodiment: through the setting of dead lever 101 smoothness, played when connecting boss 103 and transmission boss 107 and carrying out the transmission, the reinforcing transmission smoothness nature further improves and uses the convenience to reduce operating time's effect.

Specifically, the connecting boss 103 is T-shaped, and a side area close to the spring 106 is large.

In this embodiment: through the setting of connecting boss 103 shape, played the rationality that improves structural configuration, made can form between the structure and carry out zonulae occludens, further kept the stable effect of structural transmission.

Specifically, a round hole 19 is formed in the front side of the transmission boss 107, a vertical plate 20 is fixedly connected to an inner cavity of the round hole 19, and anti-skid grains are arranged on two sides of the vertical plate 20.

In this embodiment: the cooperation through round hole 19 and riser 20 is used, has played convenient to use person and has carried out the transmission to transmission boss 107, improves the effect of using the convenience.

The working principle and the using process of the invention are as follows: a user firstly places a plurality of groups of batteries 1 in the inner cavity of the first placing groove 3, then places the top plate 11 on the top of the batteries 1, aligns the connecting holes 15 with the vertical rods 13, enables the connecting holes 15 to be embedded with the vertical rods 13, and increases the connecting strength between the top plate 11 and the vertical rods 13 through the matching use of the sealing rings 14;

then, a user pinches the vertical plate 20 with fingers, the transmission boss 107 is pulled outwards through the vertical plate 20, the transmission boss 107 drives the connection boss 103 to move in the same direction, the connection boss 103 drives the two locking blocks 105 to slide outwards in the inner cavity of the sliding groove 104, meanwhile, the connection boss 103 extrudes the spring 106, the spring 106 is in a contraction state, then, the battery 1 and the connecting plate 2 are placed on the top of the bottom plate 7, the four locking blocks 6 are respectively aligned with the four vertical grooves 8, then, the battery 1, the connecting plate 2 and the locking blocks 6 are placed downwards, the locking blocks 6 are embedded into the vertical grooves 8, in the downward moving process of the locking blocks 6, the clamping grooves 102 are firstly clamped on the surface of the fixing rod 101, then, the pinching of the vertical plate 20 is released, the transmission boss 107, the connection boss 103 and the locking blocks 105 are all unlocked, so that the spring 106 is elastically restored, the connection boss 103 drives the locking blocks 105 to slide back to the front side of the sliding groove 104, the locking block 6 cannot move upwards through the locking groove 109 and the innermost side of the locking groove 109, and then through the locking of the locking block 105-degree locking groove 109, so that the battery 1 is fixed;

finally, when the battery 1 starts to operate, the plurality of motors 55 are started firstly, the motors 55 drive the heat dissipation fans 56 to rotate, the heat dissipation fans 56 rotate and form air flow, the air flow enables the cavity 4 to exchange air flow with the outside through the first ventilation holes 57 and the second ventilation holes 58, exchange of cold air and hot air is completed, the battery 1 is subjected to first-step heat dissipation and cooling, meanwhile, heat is absorbed through the heat-conducting silica gel gasket 51, a heat connecting channel is formed between the battery 1 and the connecting plate 2 through the heat-conducting silica gel gasket 51, the heat is transmitted to the heat dissipation fins 52 through the heat-conducting silica gel gasket 51, the heat dissipation fins 52 volatilize the heat, the air flow flows in the inner cavity of the heat dissipation groove 18, the heat dissipation area of the cold air and the heat dissipation fins 52 is increased, volatilization of the hot air is further accelerated, finally, the heat dissipation fins 52 transmit residual heat to the heat conduction fins 53, and the residual heat is absorbed by the heat conduction fins 53, and transmit for aluminum plate 17, through a plurality of contact surfaces of aluminum plate 17 and air, aluminum plate 17's surface heat is taken away to the at utmost, so, through absorbing the conduction to the heat that battery 1 produced, reach the purpose of cooling its heat dissipation.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

Although the invention has been described with reference to preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A quick replacement device for a new energy automobile battery comprises: battery (1) and connecting plate (2), the quantity of battery (1) is five, its characterized in that: the battery pack is characterized in that a first placing groove (3) is formed in the top of the connecting plate (2), the battery (1) is located in an inner cavity of the first placing groove (3) and is movably connected with the first placing groove (3), a cavity (4) is formed in the connecting plate (2), a heat dissipation structure (5) is arranged in the cavity (4), the heat dissipation structure (5) comprises a heat conduction silica gel gasket (51) fixedly connected with the cavity (4), a heat dissipation sheet (52) is fixedly connected to the bottom of the heat conduction silica gel gasket (51), a heat conduction sheet (53) is fixedly connected to the bottom of the heat dissipation sheet (53), the cavity (4) is fixedly connected with the bottom of the heat conduction sheet (53), a plurality of fixing grooves (54) distributed at equal intervals are formed in two sides of the inner cavity of the cavity (4), a motor (55) is fixedly connected to one side of the inner cavity of the fixing grooves (54), and a heat dissipation fan (56) is fixedly connected to an output shaft of the motor (55), the front side and the rear side of the connecting plate (2) are respectively provided with a plurality of first ventilation holes (57) distributed at equal intervals, the top of the connecting plate (2) is provided with a plurality of second ventilation holes (58) distributed at equal intervals, and the second ventilation holes (58) are positioned between the two batteries (1);

the four-corner-equal-fixedly-connected lock block (6) at the bottom of the connecting plate (2), a bottom plate (7) is arranged at the bottom of the connecting plate (2), vertical grooves (8) matched with the lock block (6) are formed in the four corners of the top of the bottom plate (7), transverse grooves (9) are formed in the bottom plate (7), the vertical grooves (8) are communicated with the transverse grooves (9), and mounting structures (10) are arranged in inner cavities of the transverse grooves (9).

2. The quick replacement device for the new energy automobile battery according to claim 1, characterized in that: the mounting structure (10) comprises a fixing rod (101) fixedly connected with a transverse groove (9), the bottom of the locking block (6) is provided with a clamping groove (102) matched with the fixing rod (101), the surface of the fixing rod (101) is connected with a connecting boss (103) in a sliding manner, sliding grooves (104) are formed in two sides of the surface of the fixing rod (101), an inner cavity of each sliding groove (104) is connected with a locking block (105) in a sliding manner, one side, far away from the sliding groove (104), of each locking block (105) is fixedly connected with the connecting boss (103), locking grooves (109) matched with the locking blocks (105) are formed in two sides of the inner cavity of the clamping groove (102), one side of the surface of the fixing rod (101) is sleeved with a spring (106), two ends of the spring (106) are fixedly connected with the connecting boss (103) and the fixing rod (101) respectively, one side of the surface of the connecting boss (103) is fixedly connected with a transmission boss (107), the front side of the transmission boss (107) penetrates through the outer side of the bottom plate (7), and a second placing groove (108) matched with the transmission boss (107) is formed in the surface of the bottom plate (7).

3. The quick replacement device for the new energy automobile battery according to claim 1, characterized in that: a top plate (11) is arranged at the top of the battery (1), two symmetrically arranged fixing blocks (12) are fixedly connected to two sides of the connecting plate (2), a vertical rod (13) is fixedly connected to the top of each fixing block (12), a sealing ring (14) is fixedly connected to the upper portion of the surface of each vertical rod (13), and a connecting hole (15) matched with the sealing ring (14) is formed in the bottom of the top plate (11); the top of the top plate (11) is provided with heat dissipation holes (21), and filter screens are filled in the inner cavities of the heat dissipation holes (21).

4. The quick replacement device for the new energy automobile battery according to claim 1, characterized in that: the bottom of connecting plate (2) is seted up fluted (16), the top fixedly connected with of bottom plate (7) a plurality of equidistant distribution aluminum plate (17), the top of aluminum plate (17) contacts with recess (16).

5. The quick replacement device for the new energy automobile battery according to claim 4, characterized in that: a plurality of ventilation grooves distributed at equal intervals are formed on the two sides of the aluminum plate (17).

6. The quick replacement device for the new energy automobile battery according to claim 1, characterized in that: the inner cavity of the cavity (4) is coated with an insulating coating.

7. The quick replacement device for the new energy automobile battery according to claim 1, characterized in that: the top of the radiating fin (52) is provided with a plurality of radiating grooves (18) which are distributed at equal intervals, and the radiating grooves (18) are S-shaped.

8. The quick replacement device for the new energy automobile battery according to claim 1, characterized in that: the surface of the fixing rod (101) is smooth.

9. The quick replacement device for the new energy automobile battery according to claim 1, characterized in that: the connecting boss (103) is T-shaped, and one side area close to the spring (106) is larger.

10. The quick replacement device for the new energy automobile battery according to claim 1, characterized in that: the front side of transmission boss (107) is opened and is equipped with round hole (19), the inner chamber fixedly connected with riser (20) of round hole (19), the both sides of riser (20) all are provided with anti-skidding line.