Automatic loading device for wall socket

Abstract

The present application relates to an automatic loading device for wall sockets, comprising a frame, a feeding frame and a conveyor belt, wherein the conveyor belt is connected to the frame, and further comprising a loading device, wherein the loading device is used to feed the products on the feeding frame to the conveyor belt, wherein the loading device comprises a pneumatic clamp, a slider, a slide bar and a driving mechanism, wherein a slide rail is provided on the frame, wherein the slider slides horizontally and is connected to the slide rail, wherein the slide bar is passed through the vertical direction and is slidably connected to the slider, wherein the pneumatic clamp is fixedly connected to the slide bar, and wherein the driving member is used to drive the movement of the slide bar and the slider. The driving member drives the slide bar and the slider to move together, thereby changing the position of the pneumatic clamp, so that the pneumatic clamp sucks up the products in the feeding frame and places them on the conveyor belt; thus, the loading is fed at intervals, and the efficiency of the loading is made more stable, thereby reducing the possibility of instability in subsequent processing and production.

Description

Technical Field

[0001] The invention relates to the field of feeding devices, in particular to an automatic feeding device for a wall socket. Background Art

[0002] An automatic loading device is a device that automatically delivers materials to a designated device or location. This device typically consists of multiple components, including a conveying mechanism, a positioning device, and a control system. The primary application areas for automatic loading devices include manufacturing, logistics, and agriculture. In manufacturing, automatic loading devices can automatically deliver materials to production lines or machines, improving production efficiency and product quality.

[0003] like Figure 5 The product shown is a wall socket. In the prior art, the wall socket is usually loaded by manual placement, but the loading situation will lead to the efficiency of subsequent processing. In the case of manual loading operations, the production process stability is poor and the production efficiency is unstable. Summary of the Invention

[0004] In order to make the loading efficiency of the wall socket more stable, the present application provides an automatic loading device for the wall socket.

[0005] The present application provides an automatic wall socket feeding device that adopts the following technical solutions:

[0006] A wall socket automatic loading device includes a first frame, a second frame, a feeding belt and a conveyor belt, the feeding belt is connected to the first frame, the conveyor belt is connected to the second frame, and also includes a loading device, the loading device is used to deliver the products on the feeding belt to the conveyor belt, the loading device includes a pneumatic clamp, a slider, a slide rod and a driving mechanism, the second frame is provided with a slide rail, the slider is connected to the slide rail in a horizontal direction, the slide rod is passed through and slidably connected to the slider in a vertical direction, the pneumatic clamp is fixedly connected to the slide rod, and the driving mechanism is used to drive the movement of the slide rod and the slider.

[0007] By adopting the above technical solution, the driving mechanism drives the slide rod and the slider to move together, changing the position of the pneumatic clamp, so that the pneumatic clamp sucks up the product in the feeding frame and places it on the conveyor belt; it plays the role of interval feeding for loading, and makes the loading efficiency more stable, reducing the possibility of instability in subsequent processing and production.

[0008] Preferably, the driving mechanism includes a second cylinder, a swing gear, a rack and a hinged rod, the swing gear is connected to the frame by rotating along the horizontal axis, one end of the hinged rod is fixedly connected to the swing gear, the hinged rod is hingedly connected to the sliding rod at the end away from the swing gear, the rack is connected to the first frame by sliding in the horizontal direction, the rack is meshed with the swing gear, the second cylinder is fixedly connected to the first frame, and one end of the piston rod of the second cylinder is fixedly connected to the rack.

[0009] The second gear is engaged with the gear train by the spring which in turn engages the gear train to move the gear train, and the second gear is engaged with the gear train to move the gear train, thereby ensuring that the gear train is kept in a stable position and in a state of equilibrium.

[0010] Preferably, it also includes an orientation device, which is used to keep the direction of the product consistent. The orientation device includes a positioning mechanism and an adjustment mechanism. The positioning mechanism is used to test the direction of the product, and the adjustment mechanism is used to adjust the direction of the product.

[0011] By adopting the above technical solution, the position of the inclined surface on the product is used as the reference position, the position of the inclined surface of the product placed on the conveyor belt is adjusted, and then the product is rotated by the adjustment mechanism to rotate the product to the specified direction position.

[0012] Preferably, the positioning mechanism includes a probe, a slide and a driving member, the probe is slidably connected to the slide perpendicular to the conveying direction of the conveyor belt, the slide is slidably connected to the frame along the sliding direction of the probe, two abutment blocks are provided on the slide, and the two abutment blocks are respectively located on both sides of the probe sliding path, and the driving member is used to drive the sliding of the probe.

[0013] By adopting the above technical solution, the probe is driven to slide by the driving member. When the probe slides to abut against the abutment block, it can drive the slide to move. When the probe slides to abut against the product, the probe stops sliding. At this time, the sliding distance of the slide is the value measured by the probe. When the product rotates, the probe can rotate along the abutment block away from the product, reducing the possibility of the probe causing damage to the product when the product rotates.

[0014] Preferably, the adjustment mechanism includes a turntable, multiple first gears, multiple gear groups, a second gear and a drive assembly. The turntable is connected to the frame and rotates along a transmission direction perpendicular to the transmission belt. The multiple first gears are coaxially and fixedly connected to the turntable. The multiple gear groups correspond to the multiple first gears respectively. The multiple gear groups are connected to the frame and rotate along the rotation direction of the turntable. The multiple gear groups are respectively engaged with the corresponding first gears. A rotating shaft is connected to the frame and rotates along the rotation direction of the second gear. The second gear is connected to the rotating shaft in a vertical direction. The second gear can be engaged with the multiple gear groups respectively. The drive assembly is used to drive the sliding of the second gear.

[0015] By adopting the above technical solution, the second gear is driven to rotate by the driving assembly, so that the second gear is engaged with different gear groups to achieve the purpose of rotating the turntable different times; when the rotating shaft rotates, the second gear rotates, thereby rotating the gear group engaged with it, and through the engagement of the gear group with the first gear, the first gear and the turntable are rotated.

[0016] Preferably, the first frame is rotatably connected to a first transmission shaft perpendicular to the transmission direction of the feed belt, the frame is fixedly connected to a servo motor, one end of the output shaft of the servo motor is coaxially and fixedly connected to the first transmission shaft, the first transmission shaft is coaxially and fixedly connected to a first bevel gear, the rotating shaft is coaxially and fixedly connected to a second bevel gear, and the first bevel gear is meshingly connected to the second bevel gear.

[0017] By adopting the above technical solution, the first transmission shaft rotates the feed belt, and at the same time, the second bevel gear rotates through the engagement of the first bevel gear and the second bevel gear, thereby rotating the rotating shaft.

[0018] Preferably, the driving assembly includes a shift fork, a connecting rod and a plurality of push rods, the shift fork is slidably connected to the sliding path of the second gear along the sliding direction of the second gear, the shift fork is located on the side of the second gear away from the first bevel gear, and the plurality of push rods are respectively slidably connected to the sliding path of the slide seat along the vertical direction, the connecting rods are respectively fixedly connected to the shift fork and the plurality of low rods, and the plurality of push rods are respectively provided with springs, and the springs always drive the plurality of low rods to move toward the side away from the shift fork.

[0019] By adopting the above technical solution, when the slide moves, different numbers of push rods are caused to slide down according to the different distances the slide moves, so that the shift fork slides down by different distances. Because the shift fork is located on the side of the second gear away from the first bevel gear, the shift fork supports the second gear. The distance the shift fork slides down is the distance the second gear slides down. According to the different distances the second gear slides down, the gear set meshing with the second gear is also different.

[0020] The technical effects of the present invention are mainly reflected in the following aspects:

[0021] 1. The present invention sets a feeding device, drives the slide bar and the slider together through the driving mechanism, changes the position of the pneumatic clamp, and makes the pneumatic clamp suck up the products in the feeding frame and place them on the conveyor belt; it plays the role of feeding at intervals, makes the feeding efficiency more stable, and reduces the possibility of instability in subsequent processing and production;

[0022] 2. The present invention provides a positioning mechanism, and drives the probe to slide through a driving member. When the probe slides and contacts the abutment block, it can drive the slide to move. When the probe slides and contacts the product, the probe stops sliding. At this time, the distance the slide slides is the value measured by the probe. When the product rotates, the probe can rotate along the abutment block away from the product, reducing the possibility of the probe damaging the product when the product rotates.

[0023] 3. The present invention provides an adjustment mechanism to drive the second gear to rotate through the drive assembly, so that the second gear is engaged with different gear groups to achieve the purpose of rotating the turntable for different numbers of circles; when the rotating shaft rotates, the second gear rotates, thereby rotating the gear group engaged with it, and through the engagement of the gear group with the first gear, the first gear and the turntable rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0025] Figure 2 It is along Figure 1 Enlarged view of point A in the middle.

[0026] Figure 3 It is a schematic structural diagram of the inner cavity of an embodiment of the present application.

[0027] Figure 4 It is a structural schematic diagram of the support rod in an embodiment of the present application.

[0028] Figure 5 This is a schematic diagram of the wall socket structure of an embodiment of the present application.

[0029] Explanation of reference numerals: 1. first frame; 11. second frame; 12. feed belt; 13. conveyor belt; 14. servo motor; 15. gear box; 16. transfer box; 161. roller; 2. orientation device; 21. positioning mechanism; 211. probe; 2111. probe head; 2112. probe base; 212. slide; 2121. contact block; 213. driving member; 2131. electric cylinder; 22. adjustment mechanism; 221. turntable; 222. first gear; 223. second gear; 224. gear set; 225 , rotating shaft; 2251, first bevel gear; 2252, second bevel gear; 226, driving assembly; 2261, shift fork; 2262, connecting rod; 2263, push rod; 2264, spring; 3, feeding device; 31, pneumatic clamp; 32, slider; 33, slide rod; 34, driving mechanism; 341, second cylinder; 342, swing gear; 343, rack; 344, hinged rod; 35, slide rail; 4, wall socket; 41, first position; 42, second position; 43, third position; 44, fourth position. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0031] An embodiment of the present application discloses an automatic loading device for a wall socket.

[0032] Reference Figure 1-Figure 3 In this embodiment, an automatic loading device 3 for wall sockets 4 includes a first frame 1, a second frame 11, a feed belt 12, and a conveyor belt 13. The feed belt 12 is connected to the first frame 1 in a driving manner. The first frame 1 is connected to a plurality of first transmission shafts that rotate perpendicular to the transmission direction of the feed belt 12. A servo motor 14 is fixedly connected to the first frame 1. One end of the output shaft of the servo motor 14 is coaxially and fixedly connected to the first transmission shaft at the end point of the transmission direction of the feed belt 12. The conveyor belt 13 is connected to the second frame 11 in a driving manner.

[0033] Reference Figure 1-Figure 3 The device also includes an orientation device 2, which is used to maintain the product's orientation. The orientation device 2 includes a positioning mechanism 21 and an adjustment mechanism 22. The positioning mechanism 21 is used to measure the product's orientation, and the adjustment mechanism 22 is used to adjust the product's orientation. The position of the inclined surface on the product, placed on the conveyor belt 13, is measured, using the position of the inclined surface as a reference. The adjustment mechanism 22 then rotates the product to a specified orientation.

[0034] Reference Figure 1-Figure 3The positioning mechanism 21 includes a probe 211, a slide 212 and a driving member 213. A gear box 15 with an inner cavity is fixedly connected to the end position of the transportation direction of the feeding belt 12. The slide 212 is slidably connected to the gear box 15 along the transmission direction perpendicular to the feeding belt 12. The probe 211 includes a probe seat 2112 and a probe head 2111. The probe seat 2112 is slidably connected to the top surface of the slide 212 along the sliding direction of the slide 212. Two abutment blocks 2121 are fixedly connected to the top surface of the slide 212. The two abutment blocks 2121 are respectively located at the two ends of the sliding direction of the probe seat 2112. The probe head 2111 is fixedly connected to the probe seat 2112. The probe head 2111 corresponding to this product is roughly in the shape of a right triangle; the driving member 213 is used to drive the sliding of the probe seat 2112. The driving member 213 is an electric cylinder 2131, which is fixedly connected to the top surface of the gear box 15. One end of the piston rod of the electric cylinder 2131 is fixedly connected to the probe. seat On 2112, the multi-stage movement of the probe base is realized by the electric cylinder 2131.

[0035] Reference Figure 1-Figure 3 The adjusting mechanism 22 includes a turntable 221, three first gears 222, a second gear 223, three gear sets 224 and a driving assembly 226. The turntable 221 is connected to the gear box 15 in a vertical direction. The bottom end of the turntable 221 passes through the gear box 15 to the inner cavity. The three first gears 222 are coaxially and fixedly connected to one end of the turntable 221 located in the inner cavity. The three first gears 222 are evenly distributed along the axis direction of the turntable 221; the three gear sets 224 correspond to the three first gears 222, and the three gear sets 224 correspond to the three first gears 222. The wheel groups 224 are connected in the inner cavity to rotate along the rotation direction of the turntable 221, and one of the gears in the three gear groups 224 is respectively engaged with the corresponding first gear 222; a rotating shaft 225 is connected in the inner cavity to rotate along the rotation direction of the rotating shaft 225, and the second gear 223 rotates with the rotating shaft 225 and is slidably connected to the rotating shaft 225 along the axial direction of the rotating shaft 225. The second gear 223 can slide to engage with multiple gear groups 224 respectively, and the driving component 226 is used to drive the sliding of the second gear 223.

[0036] Reference Figure 1-Figure 3 A first bevel gear 2251 is coaxially and fixedly connected to the transmission shaft at the end point of the transmission direction of the feeding belt 12, and a second bevel gear 2252 is coaxially and fixedly connected to the rotating shaft 225. The first bevel gear 2251 is meshed with the second bevel gear 2252.

[0037] Reference Figures 1-4The driving assembly 226 includes a shift fork 2261, a connecting rod 2262 and three push rods 2263. The shift fork 2261 is slidably connected to the rotating shaft 225 along the sliding direction of the second gear 223. The shift fork 2261 abuts against the bottom surface of the second gear 223; the three push rods 2263 are respectively slidably connected to the inner cavity along the vertical direction, and one end of the three push rods 2263 is respectively penetrated to the outside world, and the ends of the three push rods 2263 that penetrate to the outside world are respectively located on the sliding path of the slide 212. The three push rods 2263 are arranged along the sliding direction of the slide 212. Each push rod 2263 is located at one end of the outer side close to the turntable 221 and gradually gets closer to the inner cavity from the side away from the turntable 221, so that the slide 212 will press the push rod 2263 to slide downward, and the two ends of the connecting rod 2262 in the axial direction are respectively fixedly connected to the fork 2261 and the three push rods 2263. A spring 2264 is provided on the connecting rod 2262, and the two ends of the spring 2264 are respectively in contact with the inner cavity and the connecting rod 2262. The spring 2264 always drives the three push rods 2263 to move toward the side away from the inner cavity.

[0038] Reference Figure 1-Figure 5 When the feeding belt 12 conveys the wall socket 4 to the turntable 221, the electric cylinder 2131 pushes the probe 211 to abut against the product. When the probe 211 moves to abut against the abutment block 2121, the probe 211 continues to move, driving the slide 212 to move together; the three supporting rods 2263 are respectively the first supporting rod 2263, the second supporting rod 2263 and the third supporting rod 2263; the three groups of gear sets 224 are respectively the first gear 222 group, the second gear 223 group and the third gear set 224; the four corner parts on the wall socket 4 that can contact the probe 211 are respectively the first position 41, the second position 42, the third position 43 and the fourth position 44.

[0039] Reference Figure 1-Figure 5 When the probe 211 slides toward the product side and abuts against the fourth position 44 of the product, the probe 211 does not drive the slide 212 to slide, the product position is qualified, and the feed belt 12 conveys the next product to push the previous product out of the turntable 221.

[0040] Reference Figure 1-Figure 5 When the probe 211 moves toward the side of the product to abut against the first position 41 of the product, the probe 211 drives the slide 212 to abut against the first abutment rod 2263, causing the second gear 223 to slide to engage with the first gear 222 group, driving the turntable 221 to rotate half a circle.

[0041] Reference Figure 1-Figure 5When the probe 211 moves toward the side of the product to the second position 42 abutting against the product, the probe 211 drives the slide 212 to abut against the first abutment rod 2263 and the second abutment rod 2263 in sequence, causing the second gear 223 to slide to engage with the second gear 223 group, driving the turntable 221 to rotate counterclockwise a quarter turn.

[0042] Reference Figure 1-Figure 5 When the probe 211 moves toward the side of the product to the third position 43 where it abuts the product, the probe 211 drives the slide 212 to abut the first abutment rod 2263, the second abutment rod 2263 and the third abutment rod 2263 in sequence, causing the second gear 223 to slide to engage with the third gear set 224, driving the turntable 221 to rotate a quarter turn clockwise.

[0043] Reference Figure 1-Figure 5 In summary, when the slide 212 moves, different numbers of abutment rods 2263 slide down depending on the distance the slide 212 moves, causing the shift fork 2261 to slide down by different distances. Because the shift fork 2261 is located on the side of the second gear 223 away from the first bevel gear 2251, the shift fork 2261 supports the second gear 223. The distance the shift fork 2261 slides down is the same as the distance the second gear 223 slides down. Depending on the distance the second gear 223 slides down, the gear set 224 meshing with the second gear 223 also varies, causing the direction and angle of rotation of the turntable 221 to vary. This achieves the purpose of directional and intermittent transmission of products, and enables the rotation of the turntable 221 to be linked to the transmission of the conveyor belt 13, thereby improving the stability of the production process and the stability of production efficiency. When the product rotates, the probe 211 can rotate along the abutment block 2121 on the side away from the product, reducing the possibility of the probe 211 damaging the product during rotation.

[0044] Reference Figure 1-Figure 3 A transfer box 16 is fixedly connected to the second frame 11. Multiple rollers 161 are rotatably connected to the transfer box 16 along the direction of rotation of the drive shaft. After a product is oriented on the turntable 221, the feed belt 12 drives the next product onto the turntable 221 and ejects the oriented product onto the rollers 161. The friction between the rollers 161 and the product causes the rollers 161 to rotate, driving the movement of the products.

[0045] Reference Figure 1-Figure 3, also includes a loading device 3, the loading device 3 is used to deliver the product transferred to the rotating roller to the conveyor belt 13, the loading device 3 includes a pneumatic clamp 31, a slider 32, a slide rod 33 and a driving mechanism 34, the conveying box 16 is fixedly connected to a slide rail 35, the slider 32 is slidably connected to the slide rail 35 in the horizontal direction, the slide rod 33 is penetrated in the vertical direction and slidably connected to the slider 32, the pneumatic clamp 31 is fixedly connected to the bottom end of the slide rod 33, and the driving mechanism 34 is used to drive the movement of the slide rod 33 and the slider 32. The driving mechanism 34 includes a second cylinder 341, a swing gear 342, a rack 343 and a hinged rod 344. The swing gear 342 is connected to the frame along the horizontal axis, one end of the hinged rod 344 is fixedly connected to the swing gear 342, and the end connected to the hinged rod 33 away from the swing gear 342 is hingedly connected to the slide rod 33. The rack 343 is connected to the frame in a horizontal sliding direction. The rack 343 is meshed with the swing gear 342. The second cylinder 341 is fixedly connected to the frame, and one end of the piston rod of the second cylinder 341 is fixedly connected to the rack 343.

[0046] Reference Figure 1-Figure 3 , start the second cylinder 341 to make the rack 343 slide, thereby making the hinged rod 344 swing. During the swinging process of the hinged rod 344, the sliding rod 33 is driven to slide vertically, and the slider 32 is driven to slide horizontally, thereby realizing the movement of the pneumatic clamp 31; the piston movement of the piston rod of the second cylinder 341 drives the rack 343 to reciprocate, and the engagement between the rack 343 and the swing gear 342 causes the swing gear 342 to rotate back and forth. When the swing gear 342 rotates back and forth, it drives the hinged rod 344 to swing back and forth and makes the hinged rod 344 away from one end of the swing gear 342. An arc is drawn directly around the axis of the swing gear 342, and the arc is the movement trajectory of the slide bar 33 hinged on the hinged rod 344; the slide bar 33 is vertically limited by the slider 32, so that the slide bar 33 maintains vertical movement relative to the slider 32, which makes it easier for the pneumatic clamp 31 on the slide bar 33 to grab the product; each time the piston rod on the second cylinder 341 completes a piston movement, a product can be loaded, so as to achieve the effect of interval loading and keep the intervals between products consistent, thereby improving the stability of the production process and the stability of production efficiency.

[0047] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. An automatic wall socket feeding device, comprising a first frame (1), a second frame (11), a feeding belt (12) and a conveyor belt (13), wherein the feeding belt (12) is connected to the first frame (1), and the conveyor belt (13) is connected to the second frame (11), characterized in that: The machine also includes a loading device (3), which is used to feed the product on the feeding belt (12) to the conveyor belt (13). The loading device (3) includes a pneumatic clamp (31), a slider (32), a slide bar (33) and a driving mechanism (34). The second frame (11) is provided with a slide rail (35). The slider (32) is connected to the slide rail (35) in a horizontal sliding direction. The slide bar (33) is passed through and connected to the slider (32) in a vertical direction. The pneumatic clamp (31) is fixedly connected to the slide bar (33). The driving mechanism (34) is used to drive the movement of the slide bar (33) and the slider (32). The device further comprises an orientation device (2), wherein the orientation device (2) is used to keep the orientation of the product consistent, and the orientation device (2) comprises a positioning mechanism (21) and an adjustment mechanism (22), wherein the positioning mechanism (21) is used to test the orientation of the product, and the adjustment mechanism (22) is used to adjust the orientation of the product; The positioning mechanism (21) comprises a probe (211), a slide (212) and a driving member (213); the probe (211) is slidably connected to the slide (212) perpendicular to the conveying direction of the conveyor belt; the slide (212) is slidably connected to the first frame (1) along the sliding direction of the probe (211); two abutment blocks (2121) are provided on the slide (2121), and the two abutment blocks (2121) are respectively located on both sides of the sliding path of the probe (211); the driving member (213) is used to drive the sliding of the probe (211); The adjusting mechanism (22) comprises a turntable (221), a plurality of first gears (222), a plurality of gear groups (224), a second gear (223) and a driving assembly (226); the turntable (221) is connected to the first frame (1) in a direction perpendicular to the conveying direction of the feeding belt (12); the plurality of first gears (222) are coaxially and fixedly connected to the turntable (221); the plurality of gear groups (224) correspond to the plurality of first gears (222); the plurality of gear groups (224) rotate along the turntable (221) and the second gear (223); and the plurality of gear groups (224) rotate along the turntable (221) and the second gear (223). 1), the plurality of gear groups (224) are respectively engaged with the corresponding first gears (222); a rotating shaft (225) is rotatably connected to the first frame (1) along the rotating direction of the second gear (223); the second gear (223) is slidably connected to the rotating shaft (225) along the vertical direction; the second gear (223) can be respectively engaged with the plurality of gear groups (224); and the driving assembly (226) is used to drive the sliding of the second gear (223).

2. The automatic wall socket feeding device according to claim 1, characterized in that: The driving mechanism (34) comprises a second cylinder (341), a swing gear (342), a rack (343) and a hinged rod (344); the swing gear (342) is connected to the first frame (1) in a rotatable manner along a horizontal axis; one end of the hinged rod (344) is fixedly connected to the swing gear (342); the hinged rod (344) is hingedly connected to the slide bar (33) at one end away from the swing gear (342); the rack (343) is connected to the first frame (1) in a sliding manner along a horizontal direction; the rack (343) is meshed with the swing gear (342); the second cylinder (341) is fixedly connected to the first frame (1); and one end of the piston rod of the second cylinder (341) is fixedly connected to the rack (343).

3. The automatic wall socket feeding device according to claim 1, characterized in that: The first frame (1) is rotatably connected to a first transmission shaft perpendicular to the transmission direction of the feed belt (12); a servo motor (14) is fixedly connected to the frame; one end of the output shaft of the servo motor (14) is coaxially and fixedly connected to the first transmission shaft; a first bevel gear (2251) is coaxially and fixedly connected to the first transmission shaft; a second bevel gear (2252) is coaxially and fixedly connected to the rotating shaft (225); the first bevel gear (2251) is meshed with the second bevel gear (2252).

4. The automatic wall socket feeding device according to claim 1, characterized in that: The driving assembly (226) includes a shift fork (2261), a connecting rod (2262) and a plurality of push rods (2263). The shift fork (2261) is slidably connected to the sliding path of the second gear (223) along the sliding direction of the second gear (223). The shift fork (2261) is located on a side of the second gear (223) away from the first bevel gear (2251). The plurality of push rods (2263) are respectively slidably connected to the sliding path of the slide seat (212) along the vertical direction. The connecting rod (2262) is respectively fixedly connected to the shift fork (2261) and the plurality of push rods (2263). The plurality of push rods (2263) are respectively provided with springs (2264). The springs (2264) always drive the plurality of push rods (2263) to move toward the side away from the shift fork (2261).

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