CN220495572U

CN220495572U - Toy sways bear

Info

Publication number: CN220495572U
Application number: CN202322048295.7U
Authority: CN
Inventors: 蔡植苗
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-08-01
Filing date: 2023-08-01
Publication date: 2024-02-20
Anticipated expiration: 2033-08-01

Abstract

The utility model discloses a toy swing bear, which relates to the technical field of toys and comprises a swing Xiong Waike, wherein a swing bear upper cover is arranged above a swing bear shell, two swings Xiong Tui are arranged below the swing bear shell, a power assembly shell is arranged inside the swing bear shell, a control assembly is arranged below the power assembly shell, and the control assembly comprises a first transmission mechanism, a first transmission selection mechanism, a second transmission mechanism and a third transmission mechanism, wherein the first transmission mechanism is meshed with the first transmission selection mechanism, the first transmission selection mechanism is meshed with the second transmission selection mechanism, and the second transmission selection mechanism is meshed with the second transmission mechanism and the third transmission mechanism respectively. The toy swinging bear can finish the output of various different powers by using the same power source through the transmission mechanism, so that the toy has various different movement modes, and the structure among parts is compact and not easy to damage.

Description

Toy sways bear

Technical Field

The utility model relates to the technical field of toys, in particular to a toy swinging bear.

Background

The growth of children can not leave the accompanying of the toy, the toy not only can bring happiness to the children, but also can have certain inspiring effect on the intelligence of the children, and the existing toy is more and more intelligent along with the improvement of the living standard of people.

The existing toy with power is deeply favored by children, but the existing toy with power needs various transmission mechanisms to complete various complex actions, so that the internal structure is complex, the production cost is improved, and complex parts are easy to damage.

Accordingly, in view of the above, research and improvement have been made to the conventional structure and shortcomings, and a toy swing bear is provided.

Disclosure of Invention

The utility model aims to provide a toy swing bear, which solves the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a toy sways bear, includes sways Xiong Waike, sways the upper cover of bear is installed to the top of swaing the bear shell, and sways one side of bear shell and install first sways the bear arm, and sways the opposite side of bear shell and install the second and sways the bear arm, two sways Xiong Tui are installed to the below of swaing the bear shell, the internally mounted who sways the bear shell has the power pack shell, the control unit is installed to the inside below of power pack shell, and the mid-mounting of power pack shell has the stationary blade, the control unit includes first drive mechanism, first drive selection mechanism, second drive mechanism and third drive mechanism, and wherein first drive mechanism and first drive selection mechanism mesh, first drive selection mechanism and second drive selection mechanism mesh, second drive selection mechanism mesh with second drive mechanism and third drive mechanism respectively.

Further, a battery compartment is arranged above the inside of the power assembly shell, a storage battery is arranged in the battery compartment, and a motor is arranged below the battery compartment.

Further, the locating plate is installed to the top of stationary blade, and the middle part of locating plate is provided with first fixed slot, the both sides of stationary blade all are provided with the second fixed slot, and two one sides of second fixed slot install respectively with stationary blade vertically first location axle and second location axle, and first location axle and second location axle are connected with first swing bear arm and second swing bear arm respectively.

Further, a turntable is arranged in the middle of the swing Xiong Waike, and three clamping rings which are arranged at equal intervals are arranged at the edge of the turntable.

Further, the first transmission mechanism comprises a first gear, a second gear, a third gear, a fourth gear, a fifth gear and a first clamp spring, wherein the output end of the motor is meshed with the first gear, the second gear and the third gear are sleeved on the same shaft, the fourth gear and the fifth gear are sleeved on the same shaft, and the first clamp spring is sleeved at the bottom of the same shaft as the fifth gear.

Further, the first transmission selection mechanism comprises a sixth gear, a seventh gear, an eighth gear, a ninth gear, a tenth gear and an eleventh gear, the sixth gear, the seventh gear, the eighth gear and the ninth gear are sleeved on the same shaft, the tenth gear is meshed with the seventh gear or the eighth gear, the eleventh gear is meshed with the eighth gear or the ninth gear, the fourth gear is meshed with the sixth gear, and the fifth gear is meshed with the seventh gear or the eighth gear.

Further, the second transmission selection mechanism comprises a twelfth gear, a thirteenth gear, a fourteenth gear, a fifteenth gear and a second clamp spring, the twelfth gear, the thirteenth gear, the fourteenth gear and the fifteenth gear are sleeved on the same shaft, the bottom of the fifteenth gear is provided with the second clamp spring, the twelfth gear and the thirteenth gear are meshed with the seventh gear, the fourteenth gear and the fifteenth gear are meshed with the eighth gear or the ninth gear respectively, a fan-shaped clamping block is arranged on one surface of the twelfth gear opposite to the thirteenth gear, a fan-shaped clamping groove is arranged on one surface of the thirteenth gear opposite to the twelfth gear, the fan-shaped clamping block of the twelfth gear is matched with the fan-shaped clamping groove of the thirteenth gear, and a fan-shaped protruding block is arranged on one surface of the thirteenth gear opposite to the twelfth gear.

Further, the second transmission mechanism comprises a sixteenth gear and a seventeenth gear, the surface of the sixteenth gear is welded with a first cam, the surface of the seventeenth gear is welded with a second cam, and the first cam and the second cam are respectively connected with two swing bear legs through transmission rods.

Further, the third transmission mechanism comprises a gear assembly, a sixteenth gear, a seventeenth gear, a crown gear and a transmission shaft, the sixteenth gear and the seventeenth gear are sleeved on the same shaft, the seventeenth gear and the crown gear are meshed, a central shaft of the crown gear is welded with one end of the transmission shaft, the gear assembly comprises an eighteenth gear, a nineteenth gear, a rotary ring, a rotary disk and a twentieth gear, wherein the eighteenth gear, the nineteenth gear, the rotary ring, the rotary disk and the twentieth gear are all positioned on the same central axis, the fixed block is installed to the one side that the eighteenth gear deviates from the nineteenth gear, and the one side that the nineteenth gear deviates from the eighteenth gear and the one side of rotatory ring are closely welded, be provided with the gear ring on the inner ring wall of rotatory ring, the surface of rotary disk is provided with the fixture block, and the fixture block of rotary disk and the gear ring block on the inner ring wall of rotatory ring, twentieth gear and sixteenth gear meshing, the transmission shaft is kept away from through the one end and the tight laminating of spacer of crown gear.

The utility model provides a toy swinging bear, which has the following beneficial effects: the toy swinging bear can finish the output of various different powers by using the same power source through the transmission mechanism, so that the toy has various different movement modes, and the structure among parts is compact and not easy to damage;

the utility model has the advantages that the sector clamping block is arranged on one surface of the twelfth gear opposite to the thirteenth gear, the sector clamping groove is arranged on one surface of the thirteenth gear opposite to the twelfth gear, the sector clamping block of the twelfth gear is matched with the sector clamping groove of the thirteenth gear, the sector protruding block is arranged on one surface of the thirteenth gear opposite to the twelfth gear, the twelfth gear and the thirteenth gear can be periodically separated when rotating, the sector clamping block of the twelfth gear is clamped with the sector clamping groove of the thirteenth gear, when the twelfth gear and the thirteenth gear are separated, the fourteenth gear and the fifteenth gear move towards one side of the second clamping spring to enable the second clamping spring to be in a compressed state, meanwhile, the fourteenth gear, the fifteenth gear, the sixteenth gear and the seventeenth gear are meshed and drive the sixteenth gear and the seventeenth gear to rotate, the sixteenth gear and the seventeenth gear are connected with the two swing legs through the transmission rod, so that the two swing legs can be driven to swing, the sector clamping block of the twelfth gear is clamped with the sector clamping groove of the thirteenth gear, the fourteenth gear and the fifteenth gear are separated from the sixteenth gear, the sixteenth gear and the seventeenth gear are respectively meshed with the nineteenth gear, the nineteenth gear drives the sixteenth gear and the seventeenth gear to rotate through the rotating ring, the rotating disc and the twentieth gear respectively, meanwhile, the sixteenth gear and the seventeenth gear drive the transmission shaft to prop against the positioning plate through the crown gear, the positioning plate can reciprocate along the first fixed groove through bending of the transmission shaft, and the first swing arm and the second swing arm are driven to swing through reciprocating of the positioning plate.

Drawings

FIG. 1 is a schematic diagram of the overall appearance of a toy swing bear of the present utility model;

FIG. 2 is a schematic illustration of the internal structure of a toy swing bear of the present utility model;

FIG. 3 is a schematic elevational view of a toy swing bear of the present utility model;

FIG. 4 is a schematic elevational view of a fixing tab of the rocking bear of the present utility model;

FIG. 5 is a schematic rear view of a toy swing bear anchor sheet of the present utility model;

FIG. 6 is an exploded view schematic diagram of a control assembly of a toy swing bear of the present utility model;

FIG. 7 is a schematic illustration of the structure of a turntable of a toy swing bear of the present utility model;

FIG. 8 is a schematic diagram of a first transmission mechanism of a toy swing bear of the present utility model;

FIG. 9 is a schematic view of a first transmission selection mechanism of a toy swing bear of the present utility model;

FIG. 10 is a schematic diagram of a second transmission selection mechanism of a toy swing bear of the present utility model;

FIG. 11 is a schematic diagram of a second transmission mechanism of a toy swing bear of the present utility model;

FIG. 12 is a schematic illustration of a third transmission mechanism of a toy swing bear of the present utility model;

FIG. 13 is a schematic view of the gear assembly of the toy swing bear of the present utility model;

in the figure: 1. swinging Xiong Waike; 2. swinging the bear upper cover; 3. a first swing bear arm; 4. a second swing Xiong Bei; 5. swinging Xiong Tui; 6. a power assembly housing; 601. a battery compartment; 602. a motor; 7. a fixing piece; 701. a positioning sheet; 702. a first fixing groove; 703. a second fixing groove; 704. a first positioning shaft; 705. a second positioning shaft; 8. a control assembly; 9. a turntable; 901. a clasp; 10. a first transmission mechanism; 1001. a first gear; 1002. a second gear; 1003. a third gear; 1004. a fourth gear; 1005. a fifth gear; 1006. a first clamp spring; 11. a first transmission selection mechanism; 1101. a sixth gear; 1102. a seventh gear; 1103. an eighth gear; 1104. a ninth gear; 1105. a tenth gear; 1106. an eleventh gear; 12. a second transmission selection mechanism; 1201. a twelfth gear; 1202. a thirteenth gear; 1203. a fourteenth gear; 1204. a fifteenth gear; 13. a second transmission mechanism; 1301. a sixteenth gear; 1302. seventeenth gear; 1303. a first cam; 1304. a second cam; 14. a third transmission mechanism; 1401. a gear assembly; 1401a, eighteenth tooth; 1401b, nineteenth gear; 1401c, a rotating ring; 1401d, rotating disk; 1401e, twentieth gear; 1402. a sixteenth gear; 1403. seventeenth gear; 1404. crown gears; 1405. and a transmission shaft.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

As shown in fig. 1 and 13, a toy swing bear comprises a swing Xiong Waike, a swing bear upper cover 2 is installed above a swing bear shell 1, a first swing bear arm 3 is installed on one side of the swing bear shell 1, a second swing bear arm 4 is installed on the other side of the swing bear shell 1, two swing bear legs 5 are installed below the swing bear shell 1, a power component shell 6 is installed inside the swing bear shell 1, a control component 8 is installed below the inside of the power component shell 6, a fixing piece 7 is installed in the middle of the power component shell 6, the control component 8 comprises a first transmission mechanism 10, a first transmission selection mechanism 11, a second transmission mechanism 12, a second transmission mechanism 13 and a third transmission mechanism 14, wherein the first transmission mechanism 10 is meshed with the first transmission selection mechanism 11, the first transmission selection mechanism 11 is meshed with the second transmission selection mechanism 12, and the second transmission selection mechanism 12 is meshed with the second transmission mechanism 13 and the third transmission mechanism 14 respectively.

A battery compartment 601 is installed above the inside of the power assembly housing 6, a storage battery is installed inside the battery compartment 601, and a motor 602 is installed below the battery compartment 601.

The locating plate 701 is installed to the top of stationary blade 7, and the middle part of locating plate 701 is provided with first fixed slot 702, the both sides of stationary blade 7 all are provided with second fixed slot 703, and two one sides of second fixed slot 703 install respectively with stationary blade 7 vertically first location axle 704 and second location axle 705, and first location axle 704 and second location axle 705 are connected with first swing bear arm 3 and second swing bear arm 4 respectively.

The middle part of the swing bear shell 1 is provided with a turntable 9, and the edge of the turntable 9 is provided with three clamping rings 901 which are arranged at equal intervals.

The first transmission mechanism 10 comprises a first gear 1001, a second gear 1002, a third gear 1003, a fourth gear 1004, a fifth gear 1005 and a first clamp spring 1006, wherein the output end of the motor 602 is meshed with the first gear 1001, the second gear 1002 and the third gear 1003 are sleeved on the same shaft, the fourth gear 1004 and the fifth gear 1005 are sleeved on the same shaft, and the first clamp spring 1006 is sleeved at the bottom of the same shaft with the fifth gear 1005.

The first transmission selection mechanism 11 includes a sixth gear 1101, a seventh gear 1102, an eighth gear 1103, a ninth gear 1104, a tenth gear 1105, and an eleventh gear 1106, the sixth gear 1101, the seventh gear 1102, the eighth gear 1103, and the ninth gear 1104 are sleeved on the same shaft, the tenth gear 1105 meshes with the seventh gear 1102 or the eighth gear 1103, the eleventh gear 1106 meshes with the eighth gear 1103 or the ninth gear 1104, the fourth gear 1004 meshes with the sixth gear 1101, and the fifth gear 1005 meshes with the seventh gear 1102 or the eighth gear 1103.

The second transmission selection mechanism 12 comprises a twelfth gear 1201, a thirteenth gear 1202, a fourteenth gear 1203, a fifteenth gear 1204 and a second clamp spring 1205, the twelfth gear 1201, the thirteenth gear 1202, the fourteenth gear 1203 and the fifteenth gear 1204 are sleeved on the same shaft, the second clamp spring 1205 is installed at the bottom of the fifteenth gear 1204, the twelfth gear 1201 and the thirteenth gear 1202 are meshed with the seventh gear 1102, the fourteenth gear 1203 and the fifteenth gear 1204 are meshed with the eighth gear 1103 or the ninth gear 1104 respectively, a fan-shaped clamping block is arranged on one surface of the twelfth gear 1201 opposite to the thirteenth gear 1202, a fan-shaped clamping groove is arranged on one surface of the thirteenth gear 1202 opposite to the twelfth gear 1201, meanwhile, the fan-shaped clamping block of the twelfth gear 1201 is matched with the fan-shaped clamping groove of the thirteenth gear 1202, and a fan-shaped protruding block is arranged on one surface of the thirteenth gear 1202 opposite to the twelfth gear 1201.

The second transmission mechanism 13 comprises a sixteenth gear 1301 and a seventeenth gear 1302, a first cam 1303 is welded on the surface of the sixteenth gear 1301, a second cam 1304 is welded on the surface of the seventeenth gear 1302, and the first cam 1303 and the second cam 1304 are respectively connected with the two swing bear legs 5 through transmission rods.

The third transmission mechanism 14 comprises a gear assembly 1401, a sixteenth gear 1402, a seventeenth gear 1403, a crown gear 1404 and a transmission shaft 1405, wherein the sixteenth gear 1402 and the seventeenth gear 1403 are sleeved on the same shaft, meanwhile, the seventeenth gear 1403 and the crown gear 1404 are meshed, a central shaft of the crown gear 1404 is welded with one end of the transmission shaft 1405, the gear assembly 1401 comprises an eighteenth gear 1401a, a nineteenth gear 1401b, a rotating ring 1401c, a rotating disc 1401d and a twentieth gear 1401e, the eighteenth gear 1401a, the nineteenth gear 1401b, the rotating ring 1401c, the rotating disc 1401d and the twentieth gear 1401e are all positioned on the same central shaft, a fixed block is installed on one surface of the eighteenth gear 1401a, which is far away from the nineteenth gear 1401b, one surface of the nineteenth gear 1401b is tightly welded with one surface of the rotating ring 1401c, a gear ring is arranged on the inner ring wall of the rotating ring 1401c, a clamping block is arranged on the surface of the rotating ring 1401d, the clamping block of the rotating ring is tightly meshed with the twenty-second end of the rotating ring 1401c, and the twenty-eighth gear is tightly meshed with the twenty-second end of the transmission shaft.

In summary, when the toy swing bear is used, a storage battery in a battery bin 601 provides power for a motor 602, the motor 602 provides power for a first transmission selection mechanism 11 and a second transmission selection mechanism 12 through a first transmission mechanism 10, specifically, the motor 602 drives a fourth gear 1004 and a fifth gear 1005 to rotate through a first gear 1001, a second gear 1002 and a third gear 1003, at this time, the fourth gear 1004 and the fifth gear 1005 rotate through a sixth gear 1101, a seventh gear 1102, an eighth gear 1103 and a ninth gear 1104 in the first transmission selection mechanism 11, and the seventh gear 1102, the eighth gear 1103 and the ninth gear 1104 drive the second transmission selection mechanism 12 to rotate through a tenth gear 1105 and an eleventh gear 1106 respectively;

because the sector clamping block is arranged on the surface of the twelfth gear 1201 opposite to the thirteenth gear 1202, the sector clamping groove is arranged on the surface of the thirteenth gear 1202 opposite to the twelfth gear 1201, the sector clamping block of the twelfth gear 1201 is matched with the sector clamping groove of the thirteenth gear 1202, the surface of the thirteenth gear 1202 opposite to the twelfth gear 1201 is provided with the sector protruding block, the twelfth gear 1201 and the thirteenth gear 1202 can be periodically separated when rotating, the sector clamping block of the twelfth gear 1201 is engaged with the sector clamping groove of the thirteenth gear 1202, when the twelfth gear 1201 and the thirteenth gear 1202 are separated, the fourteenth gear 1203 and the fifteenth gear 1204 move towards one side of the second clamping spring 1205 to enable the second clamping spring 1205 to be in a compressed state, meanwhile, the fourteenth gear 1203, the fifteenth gear 1204 are meshed with the sixteenth gear 1301 and the seventeenth gear 1302 and drive the sixteenth gear 1301 and the seventeenth gear 1302 to rotate, the sixteenth gear 1301 and the seventeenth gear 1302 are connected with the two swing bear legs 5 through the transmission rod, so that the two swing bear legs 5 can be driven to swing, along with the fan-shaped clamping block of the twelfth gear 1201 and the fan-shaped clamping groove of the thirteenth gear 1202 are clamped together, the fourteenth gear 1203, the fifteenth gear 1204 are separated from the sixteenth gear 1301, the sixteenth gear 1301 and the seventeenth gear 1302 are respectively meshed with the nineteenth gear 1401b, the nineteenth gear 1401b respectively drives the sixteenth gear 1402 and the seventeenth gear 1403 to rotate through the rotating ring 1401c, the rotating disc 1401d and the twentieth gear 1401e, the sixteenth gear 1402 and the seventeenth gear 1403 simultaneously drive the transmission shaft 1405 to prop against the positioning plate 701 through the crown gear 1404, the transmission shaft 1405 is bent, so that the positioning plate 701 can reciprocate along the first fixing groove 702, and the first swing bear arm 3 and the second swing bear arm 4 are driven to swing along with the reciprocating movement of the positioning plate 701.

The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a toy sways bear, includes sways Xiong Waike (1), its characterized in that, sways Xiong Waike (1) top and installs sways bear upper cover (2), and sways Xiong Waike (1) one side and install first sways bear arm (3), and sways Xiong Waike (1) opposite side and install second sways Xiong Bei (4), sways Xiong Waike (1) below and install two sways Xiong Tui (5), sways Xiong Waike (1) internally mounted has power pack shell (6), control unit (8) are installed to power pack shell (6) inside below, and power pack shell (6) mid-mounting has stationary blade (7), control unit (8) include first drive mechanism (10), first drive selection mechanism (11), second drive selection mechanism (12), second drive mechanism (13) and third drive mechanism (14), wherein first drive mechanism (10) and first drive selection mechanism (11) mesh, first drive selection mechanism (11) and second drive selection mechanism (12), second drive selection mechanism (12) mesh and third drive mechanism (13) respectively.

2. A toy swing bear according to claim 1, characterised in that a battery compartment (601) is mounted above the interior of the power assembly housing (6), a battery is mounted inside the battery compartment (601), and a motor (602) is mounted below the battery compartment (601).

3. The toy swing bear according to claim 1, wherein a positioning plate (701) is installed above the fixing plate (7), a first fixing groove (702) is formed in the middle of the positioning plate (701), second fixing grooves (703) are formed in two sides of the fixing plate (7), a first positioning shaft (704) and a second positioning shaft (705) perpendicular to the fixing plate (7) are respectively installed on one sides of the two second fixing grooves (703), and the first positioning shaft (704) and the second positioning shaft (705) are respectively connected with the first swing bear arm (3) and the second swing Xiong Bei (4).

4. A toy swing bear according to claim 1, characterized in that the centre of the swing Xiong Waike (1) is provided with a turntable (9) and the edges of the turntable (9) are provided with three equally spaced snap rings (901).

5. A toy swing bear according to claim 2, wherein the first transmission mechanism (10) comprises a first gear (1001), a second gear (1002), a third gear (1003), a fourth gear (1004), a fifth gear (1005) and a first snap spring (1006), wherein the output end of the motor (602) is meshed with the first gear (1001), the second gear (1002) and the third gear (1003) are sleeved on the same shaft, the fourth gear (1004) and the fifth gear (1005) are sleeved on the same shaft, and the first snap spring (1006) is sleeved on the bottom of the same shaft as the fifth gear (1005).

6. The toy swing bear according to claim 5, wherein the first transmission selection mechanism (11) includes a sixth gear (1101), a seventh gear (1102), an eighth gear (1103), a ninth gear (1104), a tenth gear (1105) and an eleventh gear (1106), the sixth gear (1101), the seventh gear (1102), the eighth gear (1103), the ninth gear (1104) are sleeved on the same shaft, the tenth gear (1105) is meshed with the seventh gear (1102) or the eighth gear (1103), the eleventh gear (1106) is meshed with the eighth gear (1103) or the ninth gear (1104), the fourth gear (1004) is meshed with the sixth gear (1101), and the fifth gear (1005) is meshed with the seventh gear (1102) or the eighth gear (1103).

7. The toy swing bear according to claim 6, wherein the second transmission selection mechanism (12) comprises a twelfth gear (1201), a thirteenth gear (1202), a fourteenth gear (1203), a fifteenth gear (1204) and a second clamp spring (1205), the twelfth gear (1201), the thirteenth gear (1202), the fourteenth gear (1203) and the fifteenth gear (1204) are sleeved on the same shaft, the second clamp spring (1205) is installed at the bottom of the fifteenth gear (1204), the twelfth gear (1201) and the thirteenth gear (1202) are meshed with the seventh gear (1102), the fourteenth gear (1203) and the fifteenth gear (1204) are meshed with the eighth gear (1103) or the ninth gear (1104) respectively, a sector clamping block is arranged on one face of the twelfth gear (1201) opposite to the thirteenth gear (1202), a sector clamping groove is arranged on one face of the thirteenth gear (1202), and a sector clamping block of the twelfth gear (1201) is matched with the sector clamping groove of the thirteenth gear (1202), and the sector clamping block of the twelfth gear (1202) is opposite to the twelfth gear (1202).

8. A toy rocking bear according to claim 1, characterized in that the second transmission mechanism (13) comprises a sixteenth gear (1301) and a seventeenth gear (1302), and the surface of the sixteenth gear (1301) is welded with a first cam (1303), the surface of the seventeenth gear (1302) is welded with a second cam (1304), and the first cam (1303) and the second cam (1304) are connected with two rocking Xiong Tui (5) respectively through transmission rods.

9. The toy swing bear according to claim 1, wherein the third transmission mechanism (14) comprises a gear assembly (1401), a sixteenth gear (1402), a seventeenth gear (1403), a crown gear (1404) and a transmission shaft (1405), the sixteenth gear (1402) and the seventeenth gear (1403) are sleeved on the same shaft, the seventeenth gear (1403) and the crown gear (1404) are meshed, a central shaft of the crown gear (1404) is welded with one end of the transmission shaft (1405), the gear assembly (1401) comprises an eighteenth gear (1401 a), a nineteenth gear (1401 b), a rotating ring (1401 c), a rotating disc (1401 d) and a twentieth gear (1401 e), wherein the eighteenth gear (1401 a), the nineteenth gear (1401 b), the rotating ring (1401 c), the rotating disc (1401 d) and the twenty-eighth gear (1401 e) are all positioned on the same shaft, a fixed block is arranged on one side of the eighteenth gear (1403) facing away from the nineteenth gear (b), the rotating ring (1401 c) is welded with the inner wall of the rotating ring (1401 c) of the rotating ring (1401 d) and the rotating block is tightly meshed with the inner wall of the rotating ring (1401 c), the twentieth gear (1401 e) is meshed with the sixteenth gear (1402), and one end of the transmission shaft (1405) far away from the crown gear (1404) is closely attached to the positioning plate (701).