Automatic screw driving equipment for assembling electric vehicle handlebars

Abstract

The present invention discloses an automatic screw-driving device for assembling an electric vehicle handlebar, and relates to the technical field of electric vehicle handlebar assembly. The device comprises a frame, and two first motors are fixedly mounted on the surface of the frame. The output ends of the first motors penetrate into the inner cavity of the frame and are fixedly connected with a transmission roller. The surface of the transmission roller is sleeved with a transmission belt. The automatic screw-driving device for assembling an electric vehicle handlebar is provided with a material receiving and screwing mechanism. A third motor drives a cross mounting frame to rotate ninety degrees, so that a single bolt material can be received and stored. During installation, a second electric telescopic rod and an electric push rod are used to cooperate to adjust the height of an electric screwdriver and an arc-shaped clamping block, so that accessories on the electric vehicle handlebar can be assembled. At the same time, since an inclined groove is provided on the inner side of the arc-shaped clamping block, the electric screwdriver will push the two arc-shaped clamping blocks in the opposite direction when screwing. Therefore, the stability of automatic screwing can be improved, and the position displacement of the screws during installation can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle handlebar assembly, and in particular to an automatic screw driving device for assembling an electric vehicle handlebar. Background Art

[0002] Electric vehicles are pure electric vehicles powered by batteries and driven by electric motors. They provide great convenience for people's travel and are widely used in people's daily life and production. Electric vehicles are composed of multiple parts, including handlebars. Before assembling the handlebars, the components on the handlebars need to be installed, so automatic screw driving equipment is needed.

[0003] When assembling traditional electric vehicle handlebars, it is necessary to manually hold an electric screwdriver to assemble the parts on the handlebars. This method not only has low work efficiency, but also easily causes fatigue to the workers due to repeated operations, resulting in the phenomenon of screws being crooked. Therefore, we propose an automatic screw driving device for assembling electric vehicle handlebars. Summary of the invention

[0004] The object of the present invention is to provide an automatic screw driving device for assembling handlebars of an electric vehicle, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic screw-driving device for assembling handlebars of an electric vehicle, comprising a frame, two first motors are fixedly installed on the surface of the frame, the output end of the first motor passes through the inner cavity of the frame and is fixedly connected with a transmission roller, the surface of the transmission roller is sleeved with a transmission belt, the inner side of the transmission belt contacts the surface of the transmission roller, a driven roller is arranged on the inner side of the transmission belt, the surface of the driven roller contacts the inner side of the transmission belt, both ends of the driven roller are rotatably connected to the inner wall of the frame, a limit seat is arranged on the surface of the transmission belt, the bottom of the limit seat contacts the surface of the transmission belt, a fixing frame is fixedly installed on the surface of the frame, and a conveying and feeding mechanism is arranged on the top of the fixing frame;

[0006] The conveying and feeding mechanism comprises a conveying unit, which is arranged on the top of the fixing frame and is used for conveying the screw feeding;

[0007] The conveying and feeding mechanism further comprises a feeding unit, which is arranged in the inner cavity of the conveying unit, and is used in conjunction with the conveying unit, and is used for sorting and feeding the screws;

[0008] The inner cavity of the conveying and feeding mechanism is provided with an expansion mechanism, and the expansion mechanism is used in conjunction with the conveying and feeding mechanism, and the expansion mechanism is used to feed the screws;

[0009] A material receiving and screwing mechanism is provided on the top of the fixing frame. The material receiving and screwing mechanism is used in conjunction with a conveying and feeding mechanism. The material receiving and screwing mechanism is used for screwing and assembling the handlebars of the electric vehicle.

[0010] Preferably, the conveying unit includes a hopper, the hopper is fixedly mounted on the top of the fixed frame, the inner cavity of the hopper is fixedly mounted with two guide plates, the surface of the hopper is fixedly mounted with a positioning frame, the number of the positioning frames is two, the bottoms of the two positioning frames are fixedly connected to the top of the fixed frame, the bottom of the positioning frame is fixedly connected with a material conveying pipe, the bottom of the material conveying pipe passes through the fixed frame, and the top of the positioning frame is fixedly mounted with two second motors, the output end of the second motor passes through the inner cavity of the positioning frame and is fixedly connected with a first gear, the surface of the first gear is meshedly connected with a U-shaped toothed conveyor belt, the number of the U-shaped toothed conveyor belts is two, the surface of one of the U-shaped toothed conveyor belts is in contact with the inner wall of the positioning frame, the inner side of the U-shaped toothed conveyor belt is meshedly connected with a driven gear, and the top of the driven gear is fixedly mounted The first U-shaped positioning plate is fixedly connected to the first positioning rod, and the top of the first positioning rod is rotatably connected to the inner wall of the positioning frame through a bearing, and the inner cavity of the positioning frame is fixedly connected to a first U-shaped positioning plate, and the outer side of the first U-shaped positioning plate contacts the inner side of another U-shaped toothed conveyor belt, and the inner cavity of the positioning frame is fixedly installed with two first sliding bars, and the surfaces of the two first sliding bars are slidably connected with a first sliding sleeve, and the tops of the two first sliding sleeves are fixedly connected to a second U-shaped positioning plate, the outer side of one of the second U-shaped positioning plates contacts the inner side of one of the U-shaped toothed conveyor belts, and the outer side of the other second U-shaped positioning plate contacts the surface of the other U-shaped toothed conveyor belt, and the surfaces of the two first sliding bars are sleeved with a return spring, one end of the return spring is fixedly connected to the inner wall of the positioning frame, and the other end of the return spring is fixedly connected to the surface of the first sliding sleeve.

[0011] Preferably, a surface fixing sleeve of the feed conveying pipe is provided with a limit block, and the bottom of the limit block is fixedly connected to the top of the fixing frame.

[0012] Preferably, the feeding unit includes a first synchronous wheel and a trapezoidal guide frame, the first synchronous wheel is fixedly sleeved on the surface of the second motor output end, the surface of the first synchronous wheel is connected to the second synchronous wheel through a belt transmission, the bottom of the second synchronous wheel is fixedly connected to a transmission rod, the bottom of the transmission rod is rotatably connected to the top of the fixed frame through a bearing, the surface of the transmission rod is fixedly sleeved with a third synchronous wheel, the surface of the third synchronous wheel is connected to a fourth synchronous wheel through a belt transmission, the bottom of the fourth synchronous wheel is fixedly connected to a first limiting rod, the bottom of the first limiting rod is rotatably connected to the top of the fixed frame through a bearing, the top of the fourth synchronous wheel is fixedly connected to a first bevel gear, the trapezoidal guide frame is arranged in the inner cavity of the hopper, and the trapezoidal guide frame The surface contacts the inner wall of the hopper, the bottom of the trapezoidal guide frame is fixedly connected to a connecting block, one side of the connecting block is fixedly connected to a fixing rod, the end of the fixing rod away from the connecting block is rotatably connected to the connecting rod, the end of the connecting rod away from the fixing rod is rotatably connected to a circular plate, the side of the circular plate away from the connecting rod is fixedly connected to a second positioning rod, the end of the second positioning rod away from the circular plate is rotatably connected to the inner wall of the hopper through a bearing, the surface of the second positioning rod is fixedly sleeved with a second gear, the bottom of the second gear is meshed with a third gear, one side of the third gear is fixedly connected to a second limiting rod, one end of the second limiting rod penetrates to the outside of the hopper and is fixedly connected to the second bevel gear, and the surface of the second bevel gear is meshed with the first bevel gear.

[0013] Preferably, a vertical limiting groove is provided in the inner cavity of the hopper, and the fixing rod is slidably connected to the inner cavity of the vertical limiting groove.

[0014] Preferably, the expansion mechanism includes four limit plates and a first electric telescopic rod, the limit plates are all fixedly mounted on the inner cavity of the positioning frame, the outer sides of the four limit plates are in contact with the inner side of the U-shaped tooth conveyor belt, the first electric telescopic rod is fixedly mounted on the inner cavity of the positioning frame, the output end of the first electric telescopic rod is fixedly connected with the U-shaped frame, the U-shaped frame is arranged on the outer side of the limit plates, the surface of the U-shaped frame is fixedly connected with two pressure blocks, the side of the pressure block away from the U-shaped frame is provided with an inclined block, the side of the inclined block close to the pressure block is in contact with the pressure block, the side of the inclined block away from the pressure block is fixedly connected with an L-shaped bracket, the top of the L-shaped bracket is fixedly connected with a round rod, the surface of the round rod is in contact with the surface of the U-shaped tooth conveyor belt, the side of the L-shaped bracket away from the inclined block is provided with a retaining plate, the bottom of the retaining plate is fixedly connected to the inner wall of the positioning frame, the side of the retaining plate close to the L-shaped bracket is provided with a first spring, one end of the first spring is fixedly connected to the surface of the retaining plate, and the other end of the first spring is fixedly connected to the surface of the L-shaped bracket.

[0015] Preferably, a plug rod is fixedly connected to a side of the L-shaped bracket close to the retaining plate, and a side of the plug rod away from the L-shaped bracket penetrates the retaining plate and is slidably connected to an inner cavity of the retaining plate.

[0016] Preferably, the material joining and screwing mechanism includes an I-shaped frame, the I-shaped frame is fixedly mounted on the top of the fixing frame, two second electric telescopic rods are fixedly mounted on the top of the I-shaped frame, the telescopic ends of the second electric telescopic rods penetrate the I-shaped frame and are fixedly connected to a fixing plate, the surface of the fixing plate is in contact with the inner wall of the fixing frame, two third motors are fixedly mounted on the top of the fixing plate, the output end of the third motor penetrates the fixing plate and is fixedly connected to a cross mounting frame, a limit shell is fixedly mounted on the surface of the cross mounting frame, the number of the limit shells is four, the inner cavity of the limit shell is fixedly connected to a second sliding rod, and the surface of the second sliding rod is slidably connected to Two second sliding sleeves are connected, and an arc-shaped clamping block is fixedly connected to the side of the second sliding sleeve away from the inner cavity of the limiting shell, and an inclined groove is opened on the inner side of the arc-shaped clamping block. Two second springs are sleeved on the surface of the second sliding rod, and the opposite ends of the two second springs are fixedly connected to the surface of the second sliding sleeve, and the opposite ends of the two second springs are fixedly connected to the inner wall of the limiting shell, one of the arc-shaped clamping blocks is located at the bottom of the feeding pipe, and an electric push rod is fixedly installed on the top of the fixing plate, and the telescopic end of the electric push rod is fixedly connected to the mounting plate, and the bottom of the mounting plate is fixedly connected to an electric screwdriver, and the electric screwdriver is arranged on the top of the other arc-shaped clamping block.

[0017] Preferably, two tension springs are provided at the bottom of the I-shaped frame, one end of the tension spring is fixedly connected to the bottom of the I-shaped frame, and the other end of the tension spring is fixedly connected to the top of the fixing plate.

[0018] Preferably, a surface fixing sleeve of the third motor is provided with a positioning ring, and the bottom of the positioning ring is fixedly connected to the top of the fixing plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention sets a conveying and feeding mechanism, and drives the second motor to make the trapezoidal guide frame reciprocate up and down. The trapezoidal guide frame is a hollow structure with oblique openings on both sides. When moving upward, the small head of the screw is inserted into the inner cavity of the trapezoidal guide frame, and the large head is hung on the top of the trapezoidal guide frame. When the trapezoidal guide frame reciprocates up and down, it is affected by vibration, so that the screws suspended on the surface of the trapezoidal guide frame will slide along the oblique opening to the surface of the U-shaped tooth conveyor belt under the influence of the oblique opening, so that the loading of the screws can be completed. At the same time, the U-shaped tooth conveyor belt is used to transport the screws. Under the action of the expansion mechanism, a single screw can be unloaded, and the screws that have not been unloaded are returned to the inner cavity of the hopper through the U-shaped tooth conveyor belt, so as to avoid the loss of the screws and the waste of raw materials.

[0021] 2. The present invention can be used in conjunction with the material receiving and screwing mechanism by setting an expansion mechanism, so that the screws fall into the inner cavity of the material receiving and screwing mechanism, and the U-shaped tooth conveyor belt is limited by four limit plates, so as to realize the function of unloading a single screw and avoid the blockage of the screw during unloading, which affects the normal operation of the automatic screwing equipment.

[0022] 3. The present invention is provided with a material connection and screw driving mechanism. The third motor drives the cross mounting frame to rotate ninety degrees, so that a single bolt material can be stored. During installation, the second electric telescopic rod and the electric push rod are used to cooperate to adjust the height of the electric screwdriver and the arc-shaped clamping block, so that the accessories on the handlebar of the electric vehicle can be assembled. At the same time, since the inner side of the arc-shaped clamping block is provided with an inclined groove, the electric screwdriver will open the two arc-shaped clamping blocks in the opposite direction when screwing. Therefore, the stability of automatic screw driving can be improved and the position of the screw can be prevented from being offset during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a structural cross-sectional view of the frame and the transmission belt of the present invention;

[0025] Figure 3 It is a right side view of the structure of the fixing frame and the limiting seat of the present invention;

[0026] Figure 4 It is a left side view of the structure of the fixing frame and the conveying and feeding mechanism of the present invention;

[0027] Figure 5 It is a rear cross-sectional view of the structure of the conveying unit of the present invention;

[0028] Figure 6 It is a left side cross-sectional view of the structure of the conveying and feeding mechanism of the present invention;

[0029] Figure 7 It is a top cross-sectional view of the structure of the positioning frame and the expansion mechanism of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the expansion mechanism of the present invention;

[0031] Fig. 9 It is a schematic diagram of the structure of the positioning frame and the U-shaped tooth conveyor belt of the present invention;

[0032] Fig.10 It is a structural cross-sectional view of the positioning frame, the first U-shaped positioning plate and the second U-shaped positioning plate of the present invention;

[0033] Fig.11 It is a structural cross-sectional view of the hopper, guide plate and feeding unit of the present invention;

[0034] Fig.12 It is a right side cross-sectional view of the structure of the fixing frame and the material connection and screwing mechanism of the present invention;

[0035] Fig.13 It is a left sectional view of the structure of the fixing frame and the material connection and screwing mechanism of the present invention;

[0036] Fig.14 It is a structural cross-sectional view of the third motor and the cross mounting frame of the present invention.

[0037] In the figure: 1, frame; 11, first motor; 12, transmission roller; 13, transmission belt; 14, driven roller; 15, limit seat; 16, fixed frame; 2, conveying and feeding mechanism; 21, conveying unit; 2101, hopper; 2102, guide plate; 2103, positioning frame; 2104, feeding pipe; 2105, second motor; 2106, first gear; 2107, U-shaped tooth conveyor belt; 2108, driven gear; 2109, first positioning rod; 2110, first U-shaped positioning plate; 2111, first slide bar; 2112, first slide sleeve; 2113, second U-shaped positioning plate; 2114, return spring; 2115, limit block; 22, feeding unit; 2201, first synchronous wheel; 2202, second synchronous wheel; 2203, transmission rod; 2204, third synchronous wheel; 2205, fourth synchronous wheel; 2206, first limit rod; 2207, trapezoidal guide frame; 2208, connecting block; 2209, fixing rod; 2210, Connecting rod; 2211, round plate; 2212, second positioning rod; 2213, second gear; 2214, third gear; 2215, second limiting rod; 2216, second bevel gear; 2217, first bevel gear; 2218, vertical limiting groove; 3, expansion mechanism; 301, limiting plate; 302, first electric telescopic rod; 303, U-shaped frame; 304, pressure block; 305, inclined block; 306, L-shaped bracket; 307, round rod; 308, retaining plate; 309 , first spring; 310, plug rod; 4, material connection and screwing mechanism; 401, work frame; 402, second electric telescopic rod; 403, fixing plate; 404, third motor; 405, cross mounting frame; 406, limit shell; 407, second slide bar; 408, second slide sleeve; 409, arc clamping block; 410, inclined groove; 411, second spring; 412, electric push rod; 413, mounting plate; 414, electric screwdriver; 415, tension spring; 416, positioning ring. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 and Fig.13 The present invention provides a technical solution: an automatic screw driving device for assembling handlebars of an electric vehicle, comprising a frame 1, two first motors 11 are fixedly installed on the surface of the frame 1, the output end of the first motor 11 penetrates the inner cavity of the frame 1 and is fixedly connected with a transmission roller 12, a transmission belt 13 is sleeved on the surface of the transmission roller 12, the inner side of the transmission belt 13 is in contact with the surface of the transmission roller 12, a driven roller 14 is arranged on the inner side of the transmission belt 13, the surface of the driven roller 14 is in contact with the inner side of the transmission belt 13, both ends of the driven roller 14 are rotatably connected with the inner wall of the frame 1, a limit seat 15 is arranged on the surface of the transmission belt 13, the bottom of the limit seat 15 is in contact with the surface of the transmission belt 13, a fixing frame 16 is fixedly installed on the surface of the frame 1, and a conveying and feeding mechanism 2 is arranged on the top of the fixing frame 16;

[0040] The conveying and feeding mechanism 2 includes a conveying unit 21, which is arranged on the top of the fixing frame 16, and is used for conveying the screws;

[0041] The conveying and feeding mechanism 2 further includes a feeding unit 22 , which is disposed in the inner cavity of the conveying unit 21 . The feeding unit 22 is used in conjunction with the conveying unit 21 , and is used to sort and feed the screws.

[0042] As a further limitation of the conveying and feeding mechanism 2 of the present invention, the conveying unit 21 includes a hopper 2101, the hopper 2101 is fixedly installed on the top of the fixed frame 16, the inner cavity of the hopper 2101 is fixedly installed with two guide plates 2102, the surface of the hopper 2101 is fixedly installed with a positioning frame 2103, the number of the positioning frames 2103 is two, the bottoms of the two positioning frames 2103 are fixedly connected to the top of the fixed frame 16, the bottom of the positioning frame 2103 is fixedly connected with a feeding pipe 2104, the bottom of the feeding pipe 2104 passes through the fixed frame 16, the top of the positioning frame 2103 is fixedly installed with two second motors 2105, and the second motor 2 The output end of 105 passes through the inner cavity of the positioning frame 2103 and is fixedly connected to the first gear 2106. The surface of the first gear 2106 is meshedly connected to a U-shaped toothed conveyor belt 2107. The number of the U-shaped toothed conveyor belts 2107 is two, and the surface of one of the U-shaped toothed conveyor belts 2107 contacts the inner wall of the positioning frame 2103. The inner side of the U-shaped toothed conveyor belt 2107 is meshedly connected to a driven gear 2108. The top of the driven gear 2108 is fixedly connected to a first positioning rod 2109. The top of the first positioning rod 2109 is rotatably connected to the inner wall of the positioning frame 2103 through a bearing. The inner cavity of the positioning frame 2103 is fixedly connected There is a first U-shaped positioning plate 2110, the outer side of the first U-shaped positioning plate 2110 contacts the inner side of another U-shaped toothed conveyor belt 2107, the inner cavity of the positioning frame 2103 is fixedly installed with two first sliding bars 2111, the surfaces of the two first sliding bars 2111 are slidably connected with first sliding sleeves 2112, the tops of the two first sliding sleeves 2112 are fixedly connected with second U-shaped positioning plates 2113, the outer side of one of the second U-shaped positioning plates 2113 contacts the inner side of one of the U-shaped toothed conveyor belts 2107, the outer side of the other second U-shaped positioning plate 2113 contacts the surface of the other U-shaped toothed conveyor belt 2107, and the two The surface of the first slide bar 2111 is sleeved with a return spring 2114, one end of the return spring 2114 is fixedly connected to the inner wall of the positioning frame 2103, and the other end of the return spring 2114 is fixedly connected to the surface of the first slide sleeve 2112; by setting the conveying unit 21, the screws can be conveyed, and because the two U-shaped toothed conveyor belts 2107 are arranged inside and outside, with the cooperation of the loading unit 22, the screws can be conveyed with the big head facing upwards and the small head facing downwards, and the material receiving and screwing mechanism 4 is intermittent. During the conveying process, after a single screw is unloaded, the other screws return to the inner cavity of the hopper 2101 through the U-shaped toothed conveyor belt 2107.

[0043] A limit block 2115 is fixedly sleeved on the surface of the feed pipe 2104, and the bottom of the limit block 2115 is fixedly connected to the top of the fixing frame 16; by setting the limit block 2115, the feed pipe 2104 can be limited, thereby improving the stability of the feed pipe 2104 during use.

[0044] The feeding unit 22 includes a first synchronous wheel 2201 and a trapezoidal guide frame 2207. The first synchronous wheel 2201 is fixedly sleeved on the surface of the output end of the second motor 2105. The surface of the first synchronous wheel 2201 is connected to the second synchronous wheel 2202 through a belt transmission. The bottom of the second synchronous wheel 2202 is fixedly connected to a transmission rod 2203. The bottom of the transmission rod 2203 is rotatably connected to the top of the fixed frame 16 through a bearing. The surface of the transmission rod 2203 is fixedly sleeved with a third synchronous wheel 2204. The surface of the third synchronous wheel 2204 is connected to the fourth synchronous wheel 2204 through a belt transmission. The step wheel 2205, the bottom of the fourth synchronous wheel 2205 is fixedly connected to the first limit rod 2206, the bottom of the first limit rod 2206 is rotatably connected to the top of the fixed frame 16 through a bearing, the top of the fourth synchronous wheel 2205 is fixedly connected to the first bevel gear 2217, the trapezoidal guide frame 2207 is arranged in the inner cavity of the hopper 2101, the surface of the trapezoidal guide frame 2207 contacts the inner wall of the hopper 2101, the bottom of the trapezoidal guide frame 2207 is fixedly connected to the connecting block 2208, one side of the connecting block 2208 is fixedly connected to the fixing rod 2209, and the fixing rod 2217 is fixedly connected to the fixing rod 2217. The end of 209 away from the connecting block 2208 is rotatably connected to the connecting rod 2210, and the end of the connecting rod 2210 away from the fixed rod 2209 is rotatably connected to the circular plate 2211. The side of the circular plate 2211 away from the connecting rod 2210 is fixedly connected to the second positioning rod 2212. The end of the second positioning rod 2212 away from the circular plate 2211 is rotatably connected to the inner wall of the hopper 2101 through a bearing. The surface of the second positioning rod 2212 is fixedly sleeved with a second gear 2213. The bottom of the second gear 2213 is meshed and connected to the third gear 2214. The third gear 2214 A second limiting rod 2215 is fixedly connected to one side, one end of the second limiting rod 2215 passes through the outside of the hopper 2101 and is fixedly connected to a second bevel gear 2216, and the surface of the second bevel gear 2216 is meshingly connected to the first bevel gear 2217; by setting up a feeding unit 22, the screws in the inner cavity of the hopper 2101 can be fed. During the feeding process, since the two sides of the trapezoidal guide frame 2207 are provided with bevels, the screws will slide along the bevels of the trapezoidal guide frame 2207 to the surface of the U-shaped toothed conveyor belt 2107, thereby completing the sorting and feeding of the screws.

[0045] A vertical limiting groove 2218 is provided in the inner cavity of the hopper 2101, and the fixing rod 2209 is slidably connected to the inner cavity of the vertical limiting groove 2218; by providing the vertical limiting groove 2218, the fixing rod 2209 can be limited, thereby improving the stability of the vertical movement of the fixing rod 2209.

[0046] The specific implementation of this embodiment is as follows: when in use, the staff pours the screws into the inner cavity of the hopper 2101. Since the inner cavity of the hopper 2101 is provided with two guide plates 2102 opposite to each other, the screws will slide down the slopes of the two guide plates 2102 to the middle of the hopper 2101. At this time, the staff uses the external control switch to start the second motor 2105. The output end of the second motor 2105 drives the first gear 2106 and the first synchronous wheel 2201 to rotate. When the first gear 2106 rotates, it drives the U-shaped toothed conveyor belt 2107 to transmit. At the same time, when the first synchronous wheel 2201 rotates, it drives the belt to transmit. When the belt transmits, it drives the second synchronous wheel 2202 to rotate. When the second synchronous wheel 2202 rotates, it drives the transmission rod 2 203 rotates, the transmission rod 2203 drives the third synchronous wheel 2204 to rotate when rotating, the third synchronous wheel 2204 drives the belt to transmit when rotating, the belt drives the fourth synchronous wheel 2205 to rotate when transmitting, the fourth synchronous wheel 2205 drives the first bevel gear 2217 to rotate when rotating, the first bevel gear 2217 drives the second bevel gear 2216 to rotate when rotating, the second bevel gear 2216 drives the second limiting rod 2215 to rotate when rotating, the second limiting rod 2215 drives the third gear 2214 to rotate when rotating, the third gear 2214 drives the second gear 2213 to rotate when rotating, since the third gear 2214 is small in size and the second gear 2213 is large in size, When the third gear 2214 rotates one circle, the second gear 2213 can only rotate half a circle. When the third gear 2214 rotates, it drives the second positioning rod 2212 to rotate. When the second positioning rod 2212 rotates, it drives the circular plate 2211 to rotate. When the circular plate 2211 rotates, it drives one end of the connecting rod 2210 to rotate. When the connecting rod 2210 rotates, it drives one end of the fixing rod 2209 to move back and forth up and down in the inner cavity of the vertical limiting groove 2218. When the fixing rod 2209 moves back and forth up and down, it drives the trapezoidal guide frame 2207 to move back and forth up and down. Since the smaller third gear 2214 drives the larger second gear 2213 to rotate, the speed of the trapezoidal guide frame 2207 to move back and forth up and down is relatively slow. When the guide frame 2207 moves up and down, it pushes the screw in the inner cavity of the hopper 2101 upward. Since the trapezoidal guide frame 2207 is a hollow structure, the small head of the screw will be inserted into the inner cavity of the trapezoidal guide frame 2207, and the large head will be hung on the top of the trapezoidal guide frame 2207. At the same time, there are bevels on both sides of the trapezoidal guide frame 2207. When it moves up and down, the screw will slide along the bevel to the surface of the U-shaped toothed conveyor belt 2107, thereby completing the loading of the screw. After the screw slides between the two U-shaped toothed conveyor belts 2107, the screw is driven by the transmission of the U-shaped toothed conveyor belt 2107 to complete the conveying of the screw. When unloading is required, the U-shaped toothed conveyor belt 2107 on the top of the feeding pipe 2104 is opened to both sides through the expansion mechanism 3.The screws can be unloaded through the feeding pipe 2104. When expanding, since the U-shaped toothed conveyor belt 2107 is in a tight state, under the pressure of the expansion mechanism 3, one end of the two U-shaped toothed conveyor belts 2107 is affected by the pressure and drives the two second U-shaped positioning plates 2113 to move. When moving, the two second U-shaped positioning plates 2113 drive the two first sliding sleeves 2112 to squeeze the two reset springs 2114. After unloading is completed, the expansion mechanism 3 is reset. At this time, the U-shaped toothed conveyor belt 2107 can be reset under the reaction force of the reset spring 2114, so that the U-shaped toothed conveyor belt 2107 is in a tight state to transport the screws, and the unloaded screws are returned to the inner cavity of the hopper 2101 through the transmission of the U-shaped toothed conveyor belt 2107.

[0047] Example 2: Please refer to Figure 7 and Figure 8 The present invention provides a technical solution: an automatic screw driving device for assembling an electric vehicle handlebar. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. An expansion mechanism 3 is provided on the top of the fixing frame 16. The expansion mechanism 3 is used in conjunction with the conveying and feeding mechanism 2. The expansion mechanism 3 is used to feed the screws.

[0048] As a further limitation of the expansion mechanism 3 of the present invention, the expansion mechanism 3 includes four limit plates 301 and a first electric telescopic rod 302, the four limit plates 301 are fixedly installed in the inner cavity of the positioning frame 2103, the outer sides of the four limit plates 301 are in contact with the inner side of the U-shaped tooth conveyor belt 2107, the first electric telescopic rod 302 is fixedly installed in the inner cavity of the positioning frame 2103, the output end of the first electric telescopic rod 302 is fixedly connected with the U-shaped frame 303, the U-shaped frame 303 is arranged on the outer side of the limit plate 301, and the surface of the U-shaped frame 303 is fixedly connected with two pressure blocks 304, the pressure block 304 is provided with an inclined block 305 on the side away from the U-shaped frame 303, the inclined block 305 is close to the side of the pressure block 304 and contacts with the pressure block 304, the inclined block 305 is fixedly connected with an L-shaped bracket 306 on the side away from the pressure block 304, and the L-shaped bracket 306 A round rod 307 is fixedly connected to the top, and the surface of the round rod 307 is in contact with the surface of the U-shaped toothed conveyor belt 2107. A retaining plate 308 is arranged on the side of the L-shaped bracket 306 away from the inclined block 305, and the bottom of the retaining plate 308 is fixedly connected to the inner wall of the positioning frame 2103. A first spring 309 is arranged on the side of the retaining plate 308 close to the L-shaped bracket 306, and one end of the first spring 309 is fixedly connected to the surface of the retaining plate 308, and the other end of the first spring 309 is fixedly connected to the surface of the L-shaped bracket 306. By setting up the expansion mechanism 3, it can be used in conjunction with the material receiving and screwing mechanism 4 to make the screws fall into the material receiving and screwing mechanism 4, and the U-shaped toothed conveyor belt 2107 is limited by four limiting plates 301, so as to realize the function of unloading a single screw, thereby avoiding the blockage of the screw during unloading and affecting the normal operation of the automatic screwing equipment.

[0049] The side of the L-shaped bracket 306 close to the retaining plate 308 is fixedly connected with an insertion rod 310, and the side of the insertion rod 310 away from the L-shaped bracket 306 passes through the retaining plate 308 and is slidably connected with the inner cavity of the retaining plate 308; by providing the insertion rod 310, the L-shaped bracket 306 can be limited and the stability of the movement of the L-shaped bracket 306 can be improved.

[0050] The specific implementation of this embodiment is as follows: when the screw is conveyed on the surface of the U-shaped toothed conveyor belt 2107, the staff uses the external control switch to start the first electric telescopic rod 302, and the telescopic end of the first electric telescopic rod 302 drives the U-shaped frame 303 to move, and the U-shaped frame 303 drives the two pressure blocks 304 to move when moving, and the two pressure blocks 304 squeeze the two inclined blocks 305 when moving, and the two inclined blocks 305 drive the two L-shaped brackets 306 to move in the opposite direction after being squeezed, and the two L-shaped brackets 306 squeeze the two first springs 309 when moving in the opposite direction, and drive the two round rods 307 to move in the opposite direction, and the two round rods 307 squeeze the two U-shaped toothed conveyor belts 2107 when moving in the opposite direction. One side is expanded, and at the same time, under the limitation of four limit plates 301, other parts of the U-shaped toothed conveyor belt 2107 do not change, so as to prevent the screws from falling off at the same time. When the two round rods 307 expand the U-shaped toothed conveyor belts 2107 on both sides, the big head of the screw will fall down to the inner cavity of the feed pipe 2104 after detaching from the U-shaped toothed conveyor belt 2107. Since the big head of the screw is facing upward on the surface of the U-shaped toothed conveyor belt 2107, the small head of the screw falls downward into the material receiving and screwing mechanism 4 when it falls. After the unloading is completed, the telescopic end of the first electric telescopic rod 302 drives the U-shaped frame 303 to move in the opposite direction. At this time, the reaction force of the first spring 309 is used to drive the L-shaped bracket 306 to move, so that the U-shaped toothed conveyor belt 2107 can be reset.

[0051] Example 3: Please refer to Figure 3 , Figure 4 , Fig.12 , Fig.13 and Fig.14 The present invention provides a technical solution: an automatic screw driving device for assembling an electric vehicle handlebar. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. A material receiving and screw driving mechanism 4 is provided on the top of the fixing frame 16. The material receiving and screw driving mechanism 4 is used in conjunction with the conveying and feeding mechanism 2. The material receiving and screw driving mechanism 4 is used for screwing and assembling the electric vehicle handlebar.

[0052] As a further limitation of the material receiving and screwing mechanism 4 of the present invention, the material receiving and screwing mechanism 4 includes a work-shaped frame 401, the work-shaped frame 401 is fixedly installed on the top of the fixed frame 16, and two second electric telescopic rods 402 are fixedly installed on the top of the work-shaped frame 401. The telescopic ends of the second electric telescopic rods 402 pass through the work-shaped frame 401 and are fixedly connected to a fixed plate 403. The surface of the fixed plate 403 contacts the inner wall of the fixed frame 16. Two third motors 404 are fixedly installed on the top of the fixed plate 403. The output end of the third motor 404 passes through the fixed plate 403 and is fixedly connected to the fixed plate 403. A cross mounting frame 405 is fixedly connected, and a limit shell 406 is fixedly installed on the surface of the cross mounting frame 405. The number of limit shells 406 is four. The inner cavity of the limit shell 406 is fixedly connected to a second slide bar 407. The surface of the second slide bar 407 is slidably connected to two second sliding sleeves 408. The side of the second sliding sleeve 408 away from the inner cavity of the limit shell 406 is fixedly connected to an arc-shaped clamping block 409. The inner side of the arc-shaped clamping block 409 is provided with an inclined groove 410. The surface of the second slide bar 407 is sleeved with two second springs 411. The two second springs 411 are relative to each other. One end of each is fixedly connected to the surface of the second sliding sleeve 408, and the opposite ends of the two second springs 411 are fixedly connected to the inner wall of the limiting shell 406, one of the arc-shaped clamping blocks 409 is located at the bottom of the feeding pipe 2104, and an electric push rod 412 is fixedly installed on the top of the fixing plate 403, and the telescopic end of the electric push rod 412 is fixedly connected to the mounting plate 413, and the bottom of the mounting plate 413 is fixedly connected to an electric screwdriver 414, which is arranged on the top of another arc-shaped clamping block 409; by setting the material receiving and screwing mechanism 4, the third motor 404 drives the cross mounting frame 405 to rotate ninety degrees, so that a single bolt connection material can be stored. During installation, the second electric telescopic rod 402 and the electric push rod 412 are used to cooperate to adjust the height of the electric screwdriver 414 and the arc-shaped clamping block 409, so that the accessories on the handlebar of the electric vehicle can be assembled. At the same time, since the inner side of the arc-shaped clamping block 409 is provided with an inclined groove 410, the electric screwdriver 414 will push the two arc-shaped clamping blocks 409 in the opposite direction when screwing. Therefore, the stability of automatic screwing can be improved and the position of the screws can be prevented from being offset during installation.

[0053] Two tension springs 415 are provided at the bottom of the I-shaped frame 401, one end of the tension spring 415 is fixedly connected to the bottom of the I-shaped frame 401, and the other end of the tension spring 415 is fixedly connected to the top of the fixed plate 403; by providing the tension spring 415, the fixed plate 403 can be quickly reset, thereby improving the assembly efficiency of the electric vehicle handlebar.

[0054] The surface of the third motor 404 is fixedly sleeved with a positioning ring 416, and the bottom of the positioning ring 416 is fixedly connected to the top of the fixing plate 403; by providing the positioning ring 416, the third motor 404 can be fixed to prevent the position of the third motor 404 from shifting when in use.

[0055] The specific implementation of this embodiment is as follows: when the small head of the screw falls downward through the feed pipe 2104, it will fall between the two arc-shaped clamping blocks 409, and the screw can be positioned and conveyed through the arc-shaped clamping blocks 409. After the transmission belt 13 drives the limit seat 15 to move to the specified position, the staff uses the external control switch to start the second electric telescopic rod 402, and the telescopic end of the second electric telescopic rod 402 drives the fixed plate 403 to move downward. When the fixed plate 403 moves downward, it drives the third motor 404 and the cross mounting frame 405 to move downward. When the cross mounting frame 405 moves downward, it drives the limit shell 406 and the arc-shaped clamping block 409 to move downward. When the arc-shaped clamping block 409 moves downward to the specified position, the staff The operator uses the external control switch to start the electric push rod 412, and the telescopic end of the electric push rod 412 drives the electric screwdriver 414 to move downward, and uses the fine-tuning electric screwdriver 414 to make the blade engage with the screw, and then the electric screwdriver 414 is started to drive the screw into the inner cavity of the handlebar accessory of the electric vehicle. During the descent of the screw, the big head of the screw pushes the two arc-shaped clamping blocks 409 in the opposite direction, and the screw is positioned by the arc-shaped clamping block 409, which can improve the stability of the screw installation. After the screw is installed, the electric screwdriver 414 and the cross mounting frame 405 can be reset by the second electric telescopic rod 402 and the electric push rod 412, so that the arc-shaped clamping block 409 can connect the upper screw to the material.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic screw driving device for assembling an electric vehicle handlebar, comprising a frame (1), characterized in that: Two first motors (11) are fixedly mounted on the surface of the frame (1); the output end of the first motor (11) penetrates the inner cavity of the frame (1) and is fixedly connected to a transmission roller (12); a transmission belt (13) is sleeved on the surface of the transmission roller (12); the inner side of the transmission belt (13) is in contact with the surface of the transmission roller (12); a driven roller (14) is arranged on the inner side of the transmission belt (13); the surface of the driven roller (14) is in contact with the inner side of the transmission belt (13); both ends of the driven roller (14) are rotatably connected to the inner wall of the frame (1); a limit seat (15) is arranged on the surface of the transmission belt (13); the bottom of the limit seat (15) is in contact with the surface of the transmission belt (13); a fixed frame (16) is fixedly mounted on the surface of the frame (1); a conveying and feeding mechanism (2) is arranged on the top of the fixed frame (16); The conveying and loading mechanism (2) comprises a conveying unit (21), wherein the conveying unit (21) is arranged on the top of the fixing frame (16), and the conveying unit (21) is used for conveying the screw loading; The conveying unit (21) comprises a hopper (2101), wherein the hopper (2101) is fixedly mounted on the top of a fixed frame (16), wherein two guide plates (2102) are fixedly mounted in the inner cavity of the hopper (2101), and a positioning frame (2103) is fixedly mounted on the surface of the hopper (2101). The number of the positioning frames (2103) is two, and the bottoms of the two positioning frames (2103) are fixedly connected to the top of the fixed frame (16). The bottoms of the positioning frames (2103) are fixedly connected to a conveying pipe (2104), and the bottoms of the conveying pipe (2104) penetrate through the fixed frame (16). Two second motors (2105) are fixedly mounted on the top of the positioning frame (2103); the output end of the second motor (2105) passes through the inner cavity of the positioning frame (2103) and is fixedly connected to a first gear (2106); the surface of the first gear (2106) is meshedly connected to a U-shaped toothed conveyor belt (2107); the number of the U-shaped toothed conveyor belts (2107) is two, the surface of one of the U-shaped toothed conveyor belts (2107) is in contact with the inner wall of the positioning frame (2103); the inner side of the U-shaped toothed conveyor belt (2107) is meshedly connected to a driven gear (2108); the driven gear ( The top of the first positioning rod (2109) is fixedly connected to the top of the positioning frame (2108), the top of the first positioning rod (2109) is rotatably connected to the inner wall of the positioning frame (2103) through a bearing, the inner cavity of the positioning frame (2103) is fixedly connected to a first U-shaped positioning plate (2110), the outer side of the first U-shaped positioning plate (2110) is in contact with the inner side of another U-shaped toothed conveyor belt (2107), the inner cavity of the positioning frame (2103) is fixedly installed with two first sliding rods (2111), the surfaces of the two first sliding rods (2111) are both slidably connected to the first sliding sleeves (2112), and the two first sliding sleeves (2112) are fixedly installed with the first sliding sleeves (2112). 12) are fixedly connected to the top of a second U-shaped positioning plate (2113), wherein the outer side of one of the second U-shaped positioning plates (2113) contacts the inner side of one of the U-shaped toothed conveyor belts (2107), and the outer side of the other second U-shaped positioning plate (2113) contacts the surface of the other U-shaped toothed conveyor belt (2107), and the surfaces of the two first sliding rods (2111) are sleeved with a return spring (2114), one end of the return spring (2114) is fixedly connected to the inner wall of the positioning frame (2103), and the other end of the return spring (2114) is fixedly connected to the surface of the first sliding sleeve (2112); The conveying and feeding mechanism (2) further comprises a feeding unit (22), wherein the feeding unit (22) is arranged in the inner cavity of the conveying unit (21), and the feeding unit (22) is used in conjunction with the conveying unit (21), and the feeding unit (22) is used to sort and feed the screws; The feeding unit (22) comprises a first synchronous wheel (2201) and a trapezoidal guide frame (2207), wherein the first synchronous wheel (2201) is fixedly sleeved on the surface of the output end of the second motor (2105), the surface of the first synchronous wheel (2201) is connected to the second synchronous wheel (2202) via a belt drive, the bottom of the second synchronous wheel (2202) is fixedly connected to a transmission rod (2203), the bottom of the transmission rod (2203) is rotatably connected to the top of the fixed frame (16) via a bearing, and the surface of the transmission rod (2203) is fixedly sleeved with a third synchronous wheel (220 4), the surface of the third synchronous wheel (2204) is connected to the fourth synchronous wheel (2205) via a belt drive, the bottom of the fourth synchronous wheel (2205) is fixedly connected to the first limiting rod (2206), the bottom of the first limiting rod (2206) is rotatably connected to the top of the fixed frame (16) via a bearing, the top of the fourth synchronous wheel (2205) is fixedly connected to the first bevel gear (2217), the trapezoidal guide frame (2207) is arranged in the inner cavity of the hopper (2101), and the surface of the trapezoidal guide frame (2207) is in contact with the inner wall of the hopper (2101), The bottom of the trapezoidal guide frame (2207) is fixedly connected to a connecting block (2208), one side of the connecting block (2208) is fixedly connected to a fixing rod (2209), one end of the fixing rod (2209) away from the connecting block (2208) is rotatably connected to a connecting rod (2210), one end of the connecting rod (2210) away from the fixing rod (2209) is rotatably connected to a circular plate (2211), one side of the circular plate (2211) away from the connecting rod (2210) is fixedly connected to a second positioning rod (2212), and the second positioning rod (2212) away from the circular plate (221 1) is rotatably connected to the inner wall of the hopper (2101) through a bearing, a second gear (2213) is fixedly sleeved on the surface of the second positioning rod (2212), a third gear (2214) is meshedly connected to the bottom of the second gear (2213), a second limiting rod (2215) is fixedly connected to one side of the third gear (2214), one end of the second limiting rod (2215) passes through the outside of the hopper (2101) and is fixedly connected to a second bevel gear (2216), and a surface of the second bevel gear (2216) is meshedly connected to the first bevel gear (2217); The inner cavity of the conveying and feeding mechanism (2) is provided with an expansion mechanism (3), and the expansion mechanism (3) is used in conjunction with the conveying and feeding mechanism (2), and the expansion mechanism (3) is used to feed screws; The expansion mechanism (3) comprises four limit plates (301) and a first electric telescopic rod (302), wherein the limit plates (301) are all fixedly mounted in the inner cavity of the positioning frame (2103), the outer sides of the four limit plates (301) are in contact with the inner side of the U-shaped toothed conveyor belt (2107), the first electric telescopic rod (302) is fixedly mounted in the inner cavity of the positioning frame (2103), the output end of the first electric telescopic rod (302) is fixedly connected to the U-shaped frame (303), the U-shaped frame (303) is arranged on the outer side of the limit plates (301), the surface of the U-shaped frame (303) is fixedly connected to two pressure blocks (304), the side of the pressure block (304) away from the U-shaped frame (303) is provided with an inclined block (305), and the side of the inclined block (305) close to the pressure block (304) is in contact with the inner side of the U-shaped toothed conveyor belt (2107), The inclined block (305) is in contact with the pressure block (304), the side of the inclined block (305) away from the pressure block (304) is fixedly connected to an L-shaped bracket (306), the top of the L-shaped bracket (306) is fixedly connected to a round rod (307), the surface of the round rod (307) is in contact with the surface of the U-shaped toothed conveyor belt (2107), the side of the L-shaped bracket (306) away from the inclined block (305) is provided with a retaining plate (308), the bottom of the retaining plate (308) is fixedly connected to the inner wall of the positioning frame (2103), the side of the retaining plate (308) close to the L-shaped bracket (306) is provided with a first spring (309), one end of the first spring (309) is fixedly connected to the surface of the retaining plate (308), and the other end of the first spring (309) is fixedly connected to the surface of the L-shaped bracket (306); A material receiving and screwing mechanism (4) is provided on the top of the fixing frame (16), and the material receiving and screwing mechanism (4) is used in conjunction with the material conveying and feeding mechanism (2). The material receiving and screwing mechanism (4) is used for screwing and assembling the handlebars of the electric vehicle; The material connection and screw driving mechanism (4) comprises a work-shaped frame (401), wherein the work-shaped frame (401) is fixedly mounted on the top of the fixed frame (16), and two second electric telescopic rods (402) are fixedly mounted on the top of the work-shaped frame (401), and the telescopic ends of the second electric telescopic rods (402) penetrate the work-shaped frame (401) and are fixedly connected to a fixed plate (403), and the surface of the fixed plate (403) contacts the inner wall of the fixed frame (16), and two third motors (404) are fixedly mounted on the top of the fixed plate (403), and the output end of the third motor (404) penetrates the fixed plate (403) and is fixedly connected to a cross mounting frame (405), and a limit shell (406) is fixedly mounted on the surface of the cross mounting frame (405), and the number of the limit shells (406) is four, and the inner cavity of the limit shell (406) is fixedly connected to a second sliding rod (407), and the surface of the second sliding rod (407) is slidably connected to two A second sliding sleeve (408), a side of the second sliding sleeve (408) away from the inner cavity of the limiting shell (406) is fixedly connected with an arc-shaped clamping block (409), an inner side of the arc-shaped clamping block (409) is provided with an inclined groove (410), the surface of the second sliding rod (407) is sleeved with two second springs (411), the opposite ends of the two second springs (411) are fixedly connected to the surface of the second sliding sleeve (408), and the opposite ends of the two second springs (411) are fixedly connected to the inner wall of the limiting shell (406), one of the arc-shaped clamping blocks (409) is located at the bottom of the feeding pipe (2104), an electric push rod (412) is fixedly installed on the top of the fixing plate (403), the telescopic end of the electric push rod (412) is fixedly connected to the mounting plate (413), the bottom of the mounting plate (413) is fixedly connected to an electric screwdriver (414), and the electric screwdriver (414) is arranged on the top of the other arc-shaped clamping block (409).

2. The automatic screw driving device for assembling handlebars of an electric vehicle according to claim 1, characterized in that: A limit block (2115) is fixedly sleeved on the surface of the conveying pipe (2104), and the bottom of the limit block (2115) is fixedly connected to the top of the fixing frame (16).

3. The automatic screw driving device for assembling handlebars of an electric vehicle according to claim 1, characterized in that: The inner cavity of the hopper (2101) is provided with a vertical limit groove (2218), and the fixing rod (2209) is slidably connected to the inner cavity of the vertical limit groove (2218).

4. The automatic screw driving device for assembling handlebars of an electric vehicle according to claim 1, characterized in that: The side of the L-shaped bracket (306) close to the retaining plate (308) is fixedly connected to an insertion rod (310), and the side of the insertion rod (310) away from the L-shaped bracket (306) passes through the retaining plate (308) and is slidably connected to the inner cavity of the retaining plate (308).

5. The automatic screw driving device for assembling handlebars of an electric vehicle according to claim 1, characterized in that: Two tension springs (415) are arranged at the bottom of the work-shaped frame (401), one end of the tension spring (415) is fixedly connected to the bottom of the work-shaped frame (401), and the other end of the tension spring (415) is fixedly connected to the top of the fixing plate (403).

6. The automatic screw driving device for assembling handlebars of an electric vehicle according to claim 1, characterized in that: A positioning ring (416) is provided on the surface fixing sleeve of the third motor (404), and the bottom of the positioning ring (416) is fixedly connected to the top of the fixing plate (403).

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