CN113644566A

CN113644566A - Block terminal with dustproof mechanism of high-efficient heat dissipation

Info

Publication number: CN113644566A
Application number: CN202111065185.0A
Authority: CN
Inventors: 吕浩东
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-11
Filing date: 2021-09-11
Publication date: 2021-11-12

Abstract

The invention discloses a distribution box with an efficient heat dissipation and dustproof mechanism, which comprises an outer box body, wherein a heat dissipation plate is arranged on one side of the outer box body, and the heat dissipation plate comprises a rectangular vertical plate, a rectangular vertical frame, a unit ventilation mechanism, a driving shaft and a driving motor. According to the invention, the heat dissipation plate is arranged, the unit ventilation mechanisms are arranged on the heat dissipation plate and are uniformly distributed along the height direction of the outer box body, when the unit ventilation mechanisms are in a closed state, the heat dissipation plate is in a closed state, namely, hot air in the outer box body cannot be discharged outwards through the heat dissipation plate, the driving shaft is arranged, the driving shaft is rotatably connected to one side of the uniformly distributed unit ventilation mechanisms, the poking discs which are uniformly distributed are arranged on the driving shaft along the axial direction, and alternate unit ventilation mechanisms can be controlled to alternately open and close one side by the poking discs in the process of one rotation of the driving shaft, so that the effect of sweeping accumulated dust in the outer box body can be generated, and the accumulated dust in the outer box body can be thoroughly cleaned.

Description

Block terminal with dustproof mechanism of high-efficient heat dissipation

Technical Field

The invention relates to the technical field of distribution box heat dissipation, in particular to a distribution box with a high-efficiency heat dissipation dustproof mechanism.

Background

The distribution box contains a large number of electric elements which can generate a large amount of heat during operation, and then the distribution box is usually provided with heat dissipation holes, the common heat dissipation holes are arranged in a shutter window structure, then a heat dissipation fan is arranged in the distribution box, the heat dissipation fan conveys external air into the distribution box, and hot air in the distribution box can be discharged through the shutter windows, so that the following problems can be caused because the positions and the sizes of the heat dissipation holes are fixed; the flowing direction of air in the distribution box is constant, and dust accumulation is easy to occur on the electric elements and can influence electric heat dissipation; the calorific capacity and the heating rate of electrical component are not equal in the block terminal, namely can appear the big problem of local calorific capacity, and fixed louvre window formula louvre can't in time discharge this part heat fast, and the radiating effect is poor, and adaptability is poor moreover.

Therefore, the invention provides the distribution box with the efficient heat-dissipation dustproof mechanism.

Disclosure of Invention

The invention aims to: in order to solve the problems mentioned in the background art, the distribution box with the efficient heat dissipation dustproof mechanism is provided.

In order to achieve the purpose, the invention adopts the following technical scheme:

a distribution box with a high-efficiency heat-dissipation dustproof mechanism comprises an outer box body, wherein a heat dissipation plate is arranged on one side of the outer box body, the heat dissipation plate comprises a rectangular vertical plate, a rectangular vertical frame, a unit ventilation mechanism, a driving shaft and a driving motor, the rectangular vertical frame is fixedly arranged on the rectangular vertical plate and faces one side in the outer box body and is distributed in parallel, the unit ventilation mechanism is arranged in the rectangular vertical frame and is uniformly distributed along the height direction of the rectangular vertical frame, the unit ventilation mechanism comprises a fixed shaft, a rectangular sealing plate, a rectangular connecting plate, a connecting block, a sliding block, a reset spring and a transmission shaft, the fixed shaft is horizontally distributed, two ends of the fixed shaft are fixedly connected with two sides in the rectangular vertical frame, the middle parts of the transmission shaft and the fixed shaft are in sliding fit, the sliding direction of the transmission shaft is along the axial direction of the transmission shaft, the transmission shaft is horizontally distributed and vertical to the fixed shaft, one end, facing the rectangular vertical plate, of the transmission shaft is connected with the middle part of one side of the rectangular connecting block and the rectangular connecting plate through the connecting block, the transmission shaft is perpendicular to the rectangular connecting plate, one end of the sliding block is connected with one side of the rectangular connecting plate, which faces the fixed shaft in a sliding mode, the sliding block is symmetrically distributed relative to the connecting blocks, hinged plates which are close to two ends and face the rectangular vertical plate are fixedly arranged on the outer wall of the fixed shaft, one end of each rectangular sealing plate is connected with one end of each hinged plate in a hinged mode, the other end of each hinged plate is connected with the other end of the sliding block in a hinged mode, one side of each rectangular vertical plate penetrates through a window matched with the rectangular sealing plates which are arranged evenly in the middle of one side of the rectangular vertical frame, the driving shaft is connected in a rotating mode and is vertically distributed, the driving shaft is provided with a stirring plate which is evenly distributed in the axial direction, the stirring plate is matched with the other end of the transmission shaft in a rolling mode, and when the driving shaft rotates for a circle, adjacent transmission shafts are converted into axial staggered reciprocating motion for one time from being located at the same position.

As a further description of the above technical solution:

the other end of transmission shaft rotates and is connected with and rolls the dish, still fixed being provided with on the transmission shaft is close to the baffle that rolls the dish, reset spring cover is established on the transmission shaft and is located between fixed axle and the baffle.

As a further description of the above technical solution:

the poking disc is provided with an eccentric hole fixedly connected with the driving shaft, and the peripheral wall of the poking disc is matched with the rolling disc for use.

As a further description of the above technical solution:

the upper end and the lower end of the rectangular vertical plate are fixedly provided with vertical bending plates facing the outer box body, the driving motor is fixedly installed on the upper end face of one of the vertical bending plates, and a gap at one end of the driving shaft penetrates through the vertical bending plate and is fixedly connected with an output shaft of the driving motor.

As a further description of the above technical solution:

the unit ventilation mechanism further comprises a rack and a locking piece, the connecting block is a gear, one end of the connecting block is rotatably connected with one end of the transmission shaft, a positioning shaft penetrating through the rectangular connecting plate is fixedly arranged at the other end of the connecting block, the positioning shaft and the rectangular connecting plate are rotatably connected, one end of the positioning shaft is connected with the locking piece, and the rack is hinged with the other end of the connecting block, which is meshed with one end of the connecting block, and the other end of the connecting block is hinged with the other end of the rectangular sealing plate.

As a further description of the above technical solution:

the retaining member includes carousel and stop pin, the middle part and the transmission shaft fixed connection of carousel one side, the stop pin runs through one side of carousel and is eccentric distribution, and this stop pin and carousel elasticity sliding fit and slip direction are along the axis direction of stop pin, relative positioning axle circumference evenly distributed and the draw-in groove that uses with the stop pin cooperation have been seted up to the opposite side of rectangle joint plate.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the invention, the heat dissipation plate is arranged, the unit ventilation mechanisms are arranged on the heat dissipation plate and are uniformly distributed along the height direction of the outer box body, when the unit ventilation mechanisms are in a closed state, the heat dissipation plate is in a closed state, namely, hot air in the outer box body cannot be discharged outwards through the heat dissipation plate, the driving shaft is arranged, the driving shaft is rotatably connected to one side of the uniformly distributed unit ventilation mechanisms, the poking discs which are uniformly distributed along the axial direction are arranged on the driving shaft, and alternate unit ventilation mechanisms can be controlled to alternately open and close one side by the poking discs in the process of one rotation of the driving shaft, so that the arrangement can change the direction of hot air flowing to the heat dissipation plate in the outer box body, namely, the air flowing in the heat dissipation box body is in a swinging state, and therefore, dust accumulation in the outer box body can be thoroughly cleaned.

2. According to the invention, the unit ventilation mechanism comprises a fixed shaft, rectangular sealing plates, rectangular connecting plates, connecting blocks, sliding blocks, reset springs and a transmission shaft, wherein one end of the rotating shaft is connected with the rectangular connecting plates through the connecting blocks, the transmission shaft can drive the rectangular connecting plates to move when moving axially, the rectangular connecting plates can drive the rectangular sealing plates on two sides to open and close, and the driving shaft is provided with a poking disc which can control the transmission shaft to move axially, so that the unit ventilation mechanism is simple in structure, free of space occupation and low in cost.

3. According to the invention, the unit ventilation mechanism also comprises a rack and a locking piece, the connecting block is a gear, one end of the connecting block is rotatably connected with one end of the transmission shaft, the other end of the connecting block is fixedly provided with a positioning shaft penetrating through the rectangular connecting plate, the positioning shaft is rotatably connected with the rectangular connecting plate, one end of the positioning shaft is connected with the locking piece, the rack is meshed with the connecting block, one end of the rack is hinged with the other end of the rectangular sealing plate, the two racks can drive the rectangular sealing plates on two sides to synchronously move oppositely or reversely along the rectangular connecting plate by controlling the rotation of the connecting block, so that the opening and closing of the rectangular sealing plates on the single unit ventilation mechanism can be controlled, and the heat dissipation flow can be controlled according to the local heat productivity fixed point in the outer box body.

Drawings

Fig. 1 is a schematic structural diagram of an outer box of a distribution box with a high-efficiency heat dissipation dustproof mechanism according to the present invention;

fig. 2 is a schematic structural diagram of a heat dissipation plate of a distribution box with an efficient heat dissipation dustproof mechanism according to the present invention;

fig. 3 is a schematic structural diagram of the matching of the rectangular vertical plate, the rectangular vertical frame, the driving shaft and the driving motor of the distribution box with the efficient heat dissipation and dust prevention mechanism provided by the invention;

FIG. 4 is a schematic structural diagram of a unit ventilation mechanism of a distribution box with a high-efficiency heat-dissipation dustproof mechanism according to the present invention;

fig. 5 is a schematic structural diagram of a transmission shaft, a connecting block, a rectangular connecting plate, a sliding block and a rack of a distribution box with an efficient heat dissipation and dust prevention mechanism provided by the invention;

FIG. 6 is a schematic view of the locking member and rectangular connector plate of a distribution box with a highly efficient heat dissipation and dust prevention mechanism according to the present invention;

fig. 7 is a schematic structural view of the rectangular connecting plate and the positioning shaft of the distribution box with the efficient heat dissipation and dust prevention mechanism provided by the invention.

Illustration of the drawings:

1. an outer case; 11. a heat dissipation plate; 111. a rectangular vertical plate; 1111. a window; 1112. vertically bending the plate; 112. a rectangular vertical frame; 113. a unit ventilation mechanism; 1131. a fixed shaft; 11311. a hinge plate; 1132. a rectangular closing plate; 1133. rectangular connector tiles; 11331. a card slot; 1134. a joining block; 11341. positioning the shaft; 1135. a slider; 1136. a return spring; 1137. a drive shaft; 11371. rolling a disc; 11372. a baffle plate; 1138. a rack; 1139. a locking member; 11391. a turntable; 11392. a locking pin; 114. a drive shaft; 1141. a dial plate; 11411. an eccentric hole; 115. the motor is driven.

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 it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Example 1

Referring to fig. 1-5, a distribution box with a high-efficiency heat dissipation and dust prevention mechanism comprises an outer box 1, a heat dissipation plate 11 is arranged on one side of the outer box 1, an electrical element is arranged in the outer box 1, the heat dissipation plate 11 is used for discharging hot air in the outer box 1, a heat dissipation fan is further mounted on the distribution box, the heat dissipation fan guides external air into the outer box 1, the hot air in the outer box 1 is discharged through the heat dissipation plate 11, it is noted that the heat dissipation plate 11 is in a dynamically opened state, so that dust in the outer box 1 is conveniently discharged, and particularly, the electrical element in the outer box 1 and dust on the inner wall of the outer box 1 are discharged; specifically, the heat dissipation plate 11 includes a rectangular vertical plate 111, a rectangular vertical frame 112, a unit ventilation mechanism 113, a driving shaft 114 and a driving motor 115, the rectangular vertical frame 112 is fixedly disposed on the rectangular vertical plate 111 and is parallel to one side of the rectangular vertical plate 1, the unit ventilation mechanism 113 is disposed in the rectangular vertical frame 112 and is uniformly distributed along the height direction of the rectangular vertical frame 112, the unit ventilation mechanism 113 is opened to circulate air inside and outside the outer box 1, the unit ventilation mechanism 113 includes a fixing shaft 1131, a rectangular sealing plate 1132, a rectangular connecting plate 1133, a connecting block 1134, a sliding block 1135, a return spring 1136 and a driving shaft 1137, the fixing shaft 1131 is horizontally distributed and both ends thereof are fixedly connected to both sides of the rectangular vertical frame 112, the driving shaft 1137 is in sliding fit with the middle of the fixing shaft 1131 and the sliding direction is along the axial direction of the driving shaft 1137, specifically, a guiding hole slidably connected to the driving shaft 1137 may be formed in the middle of the fixing shaft 1131, the transmission shaft 1137 is horizontally distributed and perpendicular to the fixed shaft 1131, one end of the transmission shaft 1137 facing the rectangular vertical plate 111 is connected to the middle of one side of the rectangular connecting plate 1133 through a connecting block 1134, in this embodiment, the transmission shaft 1137 is fixedly connected to the rectangular connecting plate 1133 through a connecting block 1134, the transmission shaft 1137 is perpendicular to the rectangular connecting plate 1133, one end of the slider 1135 is slidably connected to one side of the rectangular connecting plate 1133 facing the fixed shaft 1131, specifically, the sliding direction is along the horizontal direction, the slider 1135 is symmetrically distributed relative to the connecting block 1134, the outer wall of the fixed shaft 1131 is fixedly provided with hinge plates 11311 close to the two ends and facing the rectangular vertical plate 111, one end of the rectangular sealing plate 1132 is hinged to one end of the hinge plate 11311, and the other end is hinged to the other end of the slider 1135, one side of the rectangular vertical plate 111 is provided with windows 1111 matching with the rectangular sealing plates 1132 which are uniformly distributed, when the rectangular sealing plates 1132 at both sides of the rectangular connecting block 1134 are on the same vertical plane, the rectangular closing plates 1132 and the rectangular connecting plates 1133 which are uniformly distributed block the whole window 1111, when the rectangular connecting plates 1133 move outwards, the rectangular closing plates 1132 at both sides of the rectangular connecting plates 1133 are driven to rotate outwards, at this time, the outer box 1 is communicated with the inside and the outside, the driving shaft 114 is connected to the middle part of one side of the rectangular vertical frame 112 in a rotating manner and is vertically distributed, specifically, the vertical bending plates 1112 facing the outer box 1 are fixedly arranged at both the upper end and the lower end of the rectangular vertical plate 111, the driving motor 115 is fixedly arranged on the upper end face of one of the vertical bending plates 1112, a gap at one end of the driving shaft 114 penetrates through the vertical bending plate 1112 and is fixedly connected with the output shaft of the driving motor 115, the driving shaft 114 is driven to rotate by the driving motor 115, wherein supporting plates are fixedly arranged at the top and the bottom of one side of the inner cavity of the outer box 1 on the rectangular vertical plate 111, the supporting plates are rotatably connected with the driving shaft 114, the driving shaft 114 is provided with the shifting plates 1141 which are uniformly distributed axially, the toggle disc 1141 is matched with the other end of the transmission shaft 1137 in a rolling manner, specifically, the other end of the transmission shaft 1137 is rotatably connected with a rolling disc 11371, a baffle 11372 close to the rolling disc 11371 is further fixedly arranged on the transmission shaft 1137, a return spring 1136 is sleeved on the transmission shaft 1137 and is positioned between the fixed shaft 1131 and the baffle 11372, wherein an eccentric hole 11411 fixedly connected with the driving shaft 114 is formed in the toggle disc 1141, the peripheral wall of the toggle disc 1141 is matched with the rolling disc 11371 for use, when the driving shaft 114 rotates for a circle, the adjacent transmission shafts 1137 are converted into axial staggered reciprocating motion once from being in the same position, that is, the toggle discs 1141 are arranged into two groups, the included angle between the two groups of toggle discs 1141 is 180 degrees, further described that the axes of the two groups of toggle discs 1141 are parallel and not collinear and are on the same plane as the axes of the driving shaft 114, and thus the uniformly distributed unit ventilation mechanisms 113 are alternately opened one by one another, the direction of the hot air flowing in the outer box 1 is changed, and the accumulated dust can be discharged.

Example 2

Referring to fig. 5-7, the difference from embodiment 1 is that the unit ventilating mechanism 113 further includes a rack 1138 and a locking member 1139, the engaging block 1134 is a gear, one end of the engaging block 1134 is rotatably connected to one end of the transmission shaft 1137, the other end of the engaging block 1134 is fixedly provided with a positioning shaft 11341 penetrating through the rectangular engaging plate 1133, the positioning shaft 11341 is rotatably connected to the rectangular engaging plate 1133 and one end thereof is connected to the locking member 1139, the rack 1138 is engaged with the engaging block 1134 and one end thereof is hinged to the other end of the rectangular closing plate 1132, the rack 1138 is slidably connected to the rectangular engaging plate 1133, the rectangular closing plates 1132 on both sides can be synchronously moved along the rectangular engaging plate 1133 in the opposite direction or in the opposite direction by controlling the rotation of the engaging block 1134 through the two racks 1138, so as to control the opening and closing of the rectangular closing plate 1132 on the single unit ventilating mechanism 113, the locking member 1139 is used for locking the positioning shaft 11341, and this arrangement is used to facilitate the concentrated heat dissipation according to the heat distribution situation of the heat in the body 1, for example, heat generated by the inner portion of the outer box body near the upper portion is concentrated, the rectangular sealing plates 1132 which control the upper portion to be uniformly distributed rotate outwards and are opened, and the rotation amplitudes are different, at this time, the upper portion can continuously exhaust hot air and increase air flow, specifically, the locking members 1139 include rotating discs 11391 and locking pins 11392, the middle portion of one side of each rotating disc 11391 is fixedly connected with the transmission shaft 1137, the locking pins 11392 penetrate through one side of each rotating disc 11391 and are eccentrically distributed, the locking pins 11392 and the rotating discs 11391 are elastically matched in a sliding manner, the sliding direction of each locking pin is along the axial direction of the corresponding locking pin 11392, the clamping grooves 11331 which are circumferentially and uniformly distributed relative to the positioning shafts 11341 and are matched with the locking pins 11392 are formed in the other side of the rectangular connecting plates 1133, and the locking pins 11392 can be separated from the clamping grooves 11331 by pulling the locking pins 11392 outwards, so that the rotating discs 11391 can be rotated, and the positioning shafts 11341 can be driven to rotate.

The working principle is as follows: when the device is used, the driving motor 115 is controlled to start and drive the driving shaft 114 to rotate, the driving shaft 114 rotates to drive the toggle discs 1141 to rotate, one group of toggle discs 1141 contacts the rolling discs 11371 on the transmission shafts 1137 which are separated by one transmission shaft 1137, at the moment, the alternate transmission shafts 1137 slide outwards and push the rectangular connecting plates 1133 to move outwards, and then the rectangular sealing plates 1132 at two sides of the connecting block 1134 are driven to rotate outwards, at the moment, channels generated by the alternate rectangular sealing plates 1132 are communicated with the inside and the outside of the outer box 1, the heat dissipation fan pushes hot air in the outer box 1 to be discharged outwards, along with the continuous rotation of the driving shaft 114, the other group of toggle discs 1141 contacts the rolling disc 11371 at one end of the stationary transmission shaft 1137, meanwhile, the moving transmission shaft 1137 is reset under the action of the reset spring 1136, the stationary transmission shaft 1137 starts to move outwards, and the corresponding rectangular sealing plates 1132 are controlled to open to form a new circulation channel, further, the direction of the air flowing out of the outer box 1 is changed, and the manner of periodically changing the air flowing direction can easily remove the dust accumulated in the outer box 1.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A distribution box with a high-efficiency heat dissipation dustproof mechanism comprises an outer box body (1), wherein a heat dissipation plate (11) is arranged on one side of the outer box body (1), and is characterized in that the heat dissipation plate (11) comprises a rectangular vertical plate (111), a rectangular vertical frame (112), a unit ventilation mechanism (113), a driving shaft (114) and a driving motor (115), the rectangular vertical frame (112) is fixedly arranged on the rectangular vertical plate (111) and faces one side in the outer box body (1) and is distributed in parallel, the unit ventilation mechanism (113) is arranged in the rectangular vertical frame (112) and is uniformly distributed along the height direction of the rectangular vertical frame (112), the unit ventilation mechanism (113) comprises a fixing shaft (1131), a rectangular sealing plate (1132), a rectangular connecting plate (1133), a connecting block (1134), a sliding block (1135), a reset spring (1136) and a transmission shaft (1137), the fixing shaft (1131) is distributed horizontally, and two ends of the fixing shaft are fixedly connected with two sides in the rectangular vertical frame (112), the transmission shaft (1137) is in sliding fit with the middle of the fixing shaft (1131) in a sliding direction along the axial direction of the transmission shaft (1137), the transmission shaft (1137) is horizontally distributed and is vertical to the fixing shaft (1131), one end of the transmission shaft (1137) facing the rectangular vertical plate (111) is connected with the middle of one side of the rectangular connecting plate (1133) through a connecting block (1134), the transmission shaft (1137) is vertical to the rectangular connecting plate (1133), one end of the sliding block (1135) is in sliding connection with one side of the rectangular connecting plate (1133) facing the fixing shaft (1131), the sliding block (1135) is symmetrically distributed relative to the connecting block (1134), hinge plates (11311) close to two ends and facing the rectangular vertical plate (111) are fixedly arranged on the outer wall of the fixing shaft (1131), one end of the rectangular sealing plate (1132) is hinged with one end of the hinge plate (11311) and the other end of the sliding block (1135) is hinged, one side of rectangle riser (111) runs through and sets up window (1111) with evenly distributed's rectangle shrouding (1132) complex, drive shaft (114) rotate connect in the middle part of rectangle founding frame (112) one side and for vertical distribution, this drive shaft (114) are provided with axial evenly distributed's stirring dish (1141), the other end roll cooperation of this stirring dish (1141) and transmission shaft (1137), when the in-process of drive shaft (114) rotatory a week, adjacent transmission shaft (1137) are turned into mutually and are once for the crisscross reciprocating motion of axial by being in same position.

2. The distribution box with the efficient heat dissipation and dust prevention mechanism according to claim 1, wherein a rolling disc (11371) is rotatably connected to the other end of the transmission shaft (1137), a baffle plate (11372) close to the rolling disc (11371) is further fixedly arranged on the transmission shaft (1137), and the return spring (1136) is sleeved on the transmission shaft (1137) and located between the fixed shaft (1131) and the baffle plate (11372).

3. The distribution box with the efficient heat dissipation and dust prevention mechanism is characterized in that an eccentric hole (11411) fixedly connected with the driving shaft (114) is formed in the poking disc (1141), and the outer peripheral wall of the poking disc (1141) is matched with the rolling disc (11371) for use.

4. The distribution box with the efficient heat dissipation and dust prevention mechanism according to claim 1, wherein vertical bending plates (1112) facing the outer box body (1) are fixedly arranged at both upper and lower ends of the rectangular vertical plate (111), the driving motor (115) is fixedly installed on an upper end face of one of the vertical bending plates (1112), and a gap at one end of the driving shaft (114) penetrates through the vertical bending plate (1112) and is fixedly connected with an output shaft of the driving motor (115).

5. The distribution box with the efficient heat dissipation and dust prevention mechanism according to claim 1, wherein the unit ventilation mechanism (113) further comprises a rack (1138) and a locking member (1139), the connecting block (1134) is a gear, one end of the connecting block (1134) is rotatably connected with one end of a transmission shaft (1137), the other end of the connecting block (1134) is fixedly provided with a positioning shaft (11341) penetrating through a rectangular connecting plate (1133), the positioning shaft (11341) is rotatably connected with the rectangular connecting plate (1133) and one end of the positioning shaft is connected with the locking member (1139), the rack (1138) is engaged with the connecting block (1134) and one end of the rack is hinged with the other end of the rectangular sealing plate (1132).

6. The distribution box with the efficient heat dissipation and dust prevention mechanism is characterized in that the locking member (1139) comprises a rotary disc (11391) and a locking pin (11392), the middle part of one side of the rotary disc (11391) is fixedly connected with the transmission shaft (1137), the locking pin (11392) penetrates through one side of the rotary disc (11391) and is eccentrically distributed, the locking pin (11392) is elastically matched with the rotary disc (11391) in a sliding mode, the sliding direction of the locking pin is along the axial direction of the locking pin (11392), and the other side of the rectangular connecting plate (1133) is provided with clamping grooves (11331) which are uniformly distributed in the circumferential direction relative to the positioning shaft (11341) and are matched with the locking pin (11392) for use.