Spraying auxiliary device for cylindrical power battery

Abstract

The utility model discloses a cylindrical power battery spraying auxiliary device which comprises a bottom plate, a turnover structure is arranged on the bottom plate, and the turnover structure comprises a frame body, a turnover plate rotationally connected to the frame body and a first driving unit driving the turnover plate to rotate on the frame body. A cup holder for placing a battery is arranged in the middle of the turnover plate; a clamping structure is arranged on the turnover plate, and the clamping structure can clamp a battery and can reciprocate in one direction under the action of a second driving unit. According to the utility model, the cylindrical batteries with different heights can be clamped, overturned and rotated only through one complete device, so that the batteries can be conveniently sprayed.

Description

Technical Field

[0001] This utility model relates to a cylindrical power battery spraying device, belonging to the field of battery packaging technology. Background Technology

[0002] In the manufacturing process of cylindrical power batteries, certain operations need to be performed on the cylindrical batteries to facilitate subsequent processing, such as clamping, flipping, and rotating.

[0003] Current technology uses semi-circular parts that match the battery to clamp it from both sides at a fixed height. If the battery height changes, the clamping height of this technology cannot be adjusted accordingly, resulting in the clamping position not being at the battery's center of gravity. This poses a risk of the battery becoming unbalanced and falling during movement. Furthermore, how to achieve more stable flipping and rotation while clamping is a key issue that needs to be addressed in the production of cylindrical power batteries. Utility Model Content

[0004] The present invention aims to address the above-mentioned technical problems by providing a cylindrical power battery spraying auxiliary device that allows for convenient adjustment of the clamping height for batteries of different heights.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A cylindrical power battery spraying device includes a base plate with a flipping structure. The flipping structure includes a frame, a flipping plate rotatably connected to the frame, and a first drive unit that drives the flipping plate to rotate on the frame. A cup holder for placing the battery is provided in the middle of the flipping plate. A clamping structure is provided on the flipping plate, which can clamp the battery and can reciprocate in one direction under the action of the second drive unit.

[0007] Therefore, when cylindrical power batteries of different heights are placed in the cup holder, the height of the clamping structure is controlled by the second drive unit, thereby adjusting the clamping height of the clamping block for batteries of different heights, so that the clamping position is always at the center of gravity of the battery. When the flipping structure flips the battery, the clamping structure will move together with the flipping plate, thereby preventing the battery from falling off.

[0008] Based on the embodiments of this utility model, further optimizations can be made to this utility model. The optimized technical solutions are as follows:

[0009] To ensure the accuracy of the lifting position of the clamping structure, in one specific embodiment, the clamping structure includes a first mounting plate and a second mounting plate disposed on both sides of the cup holder; a first clamping slide cylinder and a second clamping slide cylinder are disposed opposite each other on one side of the first mounting plate and the second mounting plate, and clamping blocks are disposed at the extended ends of the first clamping slide cylinder and the second clamping slide cylinder; a second driving unit is connected to the other side of the first mounting plate and the second mounting plate, the second driving unit is fixedly disposed on the flip plate, and the extended end of the second driving unit passes through the flip plate and is connected to the first mounting plate and the second mounting plate; a lifting origin sensor for detecting the height position of the clamping blocks is disposed on the flip plate.

[0010] To make the lifting process of the clamping structure more stable, in one specific embodiment, guide components are provided on both sides of the flip plate. The guide components include a fixed component fixedly connected to the flip plate and a movable component connected to the first mounting plate and the second mounting plate. An ink-proof block is provided on the upper surface of the clamping block.

[0011] In one specific embodiment, one end of the cup holder is open, an anti-slip rubber pad is provided on the bottom of the cup holder, and a plurality of magnets are provided on the cup wall of the cup holder, which are distributed around the circumference of the cup holder.

[0012] In order for the battery to continue rotating in the cup holder of the flip plate after being flipped, in one specific embodiment, the flip plate is provided with a rotating structure for driving the cup holder to rotate; the rotating structure includes a rotating shaft connected to the bottom of the cup holder, the rotating shaft is mounted on the flip plate by a bearing, and a third driving unit is connected to the bottom of the rotating shaft.

[0013] In one specific embodiment, a motor fixing plate is provided on the end face of the motor, an adapter plate is provided between the motor fixing plate and the flipping plate, the output end of the third drive unit is connected to the rotating shaft through a coupling, and the rotating shaft and the flipping plate are rotatably connected through a bearing with a mounting seat.

[0014] When the battery rotates, the clamping structure will release the clamping state. In order to stabilize the rotation of the battery, the other end face of the battery needs to be fixed. In a specific embodiment, an end face clamping structure is provided on one side of the flipping structure. The end face clamping structure includes a base, a movable plate is provided on the base, a driving component is provided between the lower part of the movable plate and the base, a clamping component is provided above the movable plate, and a manual displacement platform is provided between the movable plate and the clamping component.

[0015] In one specific embodiment, the drive assembly includes a ball screw connected to the base via a mounting bracket, the ball screw being connected to the movable plate; a drive motor is provided on one side of the ball screw, and a belt drive mechanism is provided between the drive motor and the ball screw, the belt drive mechanism including two keyless synchronous pulleys respectively connected to the output end of the drive motor and the end of the ball screw, and a synchronous belt wound around the two keyless synchronous pulleys.

[0016] In one specific embodiment, the clamping assembly includes an end-face clamping slide cylinder, the output end of which is sequentially connected to a connecting assembly and an end-face clamping block; the connecting assembly includes an end-face clamping driven shaft connected to the rear end of the end-face clamping block, a double-row angular contact ball bearing is sleeved on the end-face clamping driven shaft, the double-row angular contact ball bearing is disposed in an end-face clamping bearing seat, and is connected to the output end of the end-face clamping slide cylinder through a slide cylinder connecting plate.

[0017] To enable battery rotation while limiting the rotation angle, in one specific embodiment, the frame includes a first support plate and a second support plate arranged opposite to each other; one end of the rotation plate is connected to the first drive unit via a drive shaft connecting plate, the drive shaft connecting plate is rotatably connected to the first support plate, and a reducer is provided between the drive shaft connecting plate and the first drive unit; the other end of the rotation plate is rotatably connected to the second support plate via a driven connecting plate, the driven connecting plate is rotatably connected to the second support plate via a deep groove ball bearing and a bearing mounting seat; the bearing mounting seat is provided with a rotation origin sensor fixing sheet metal and a rotation origin sensor and a rotation sensing plate provided on the rotation origin sensor fixing sheet metal; a first rotation limit block and a second rotation limit block are respectively provided on the first support plate and the second support plate.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1) The cylindrical power battery spraying auxiliary device of this utility model realizes the clamping of cylindrical power batteries at different heights by setting a second drive unit, which makes it convenient to adjust the clamping height for batteries of different heights, improves the stability of the battery during the flipping process, and prevents the battery from falling off during the flipping process.

[0020] 2) The cylindrical power battery spraying auxiliary device of this utility model enables the battery to rotate stably after being flipped by setting a rotating structure and an end clamping structure; the clamping, flipping and rotating operation of cylindrical batteries of different heights can be realized by a single complete device, which facilitates the spraying of the battery. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the overall structure of the cylindrical power battery spraying auxiliary device of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of the lifting structure of this utility model;

[0023] Figure 3 This is an exploded view of the lifting structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the overall structure of the flip-over structure of this utility model;

[0025] Figure 5 This is an exploded view of the flip-over structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the overall structure of the end face clamping structure of this utility model;

[0027] Figure 7 This is an exploded view of the end face clamping structure of this utility model;

[0028] Figure 8 This is a schematic diagram of the overall structure of the rotating structure of this utility model;

[0029] Figure 9 This is an exploded view of the rotating structure of this utility model.

[0030] In the figure

[0031] 11-Clamping structure; 110-Guide assembly; 111-Second drive unit; 112-First clamping slide cylinder; 113-Second clamping slide cylinder; 114-Ink-proof block; 115-Clamping block; 116-Lifting origin sensor; 117-First mounting plate; 118-Second mounting plate; 12-Tilting structure; 120-First drive unit; 121-Reducer; 122-Drive shaft connecting plate; 123-First support plate ; 124-Flipping plate; 125-Second support plate; 126-Driven connecting plate; 127-Deep groove ball bearing; 128-Bearing mounting base; 129-Rotation sensing plate; 1210-Flipping origin sensor; 1211-Flipping origin sensor fixing sheet metal; 1212-Reinforcing rib; 1214-First flipping limit block; 1213-Second flipping limit block; 13-End face clamping structure; 1301-Drive motor; 131- Drive motor mounting plate; 132-Keyless synchronous pulley; 133-Synchronous belt; 134-Mounting base; 135-End face clamping slide cylinder mounting plate; 136-End face clamping slide cylinder; 137-End face slide cylinder connecting plate; 138-End face clamping bearing housing; 139-Double row angular contact ball bearing; 1310-C-type retaining ring for bore; 1311-End face clamping driven shaft; 1312-End face clamping block; 1313-Manual displacement platform; 1314-Screw support seat; 1315-Moving plate; 1316-Auxiliary linear guide; 1317-Base; 1318-Ball screw; 14-Rotating structure; 140-Ball screw; 141-Magnet; 142-Cup holder; 143-Rotating shaft; 144-Bearing with seat; 145-Adapter plate; 146-Shaft C-type retaining ring; 147-Coupling; 148-Fixing plate; 130-Third drive unit; 15-Base plate. Detailed Implementation

[0032] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0033] like Figure 1 As shown, the cylindrical power battery spraying device of this embodiment includes a clamping structure 11, a flipping structure 12, an end face clamping structure 13, a base plate 15, and a rotating structure 14. The flipping structure 12 and the end face clamping structure 13 are fixedly installed on the base plate 15, and the clamping structure 11 and the rotating structure 14 are fixed on the flipping structure 12.

[0034] like Figures 4-5As shown, the flipping structure 12 includes a frame, a flipping plate 124 rotatably connected to the frame, and a first drive unit 120 that drives the flipping plate 124 to rotate on the frame. The first drive unit 120 selects a flipping motor, and a cup holder 142 for placing batteries is provided in the middle of the flipping plate 124. The frame includes a first support plate 123 and a second support plate 125 arranged opposite to each other; one end of the flip plate 124 is connected to the first drive unit 120 through a drive shaft connecting plate 122, the drive shaft connecting plate 122 is rotatably connected to the first support plate 123, and a reducer 121 is provided between the drive shaft connecting plate 122 and the first drive unit 120; the other end of the flip plate 124 is rotatably connected to the second support plate 125 through a driven connecting plate 126, the driven connecting plate 126 is rotatably connected to the second support plate 125 through a deep groove ball bearing 127 and a bearing mounting seat 128; the bearing mounting seat 128 is provided with a flip origin sensor fixing sheet metal 1211 and a flip origin sensor 1210 and a rotation sensing plate 129 provided on the flip origin sensor fixing sheet metal 1211; the first support plate 123 and the second support plate 125 are respectively provided with a first flip limit block 1214 and a second flip limit block 1213.

[0035] A deep groove ball bearing 127 is placed inside a bearing mounting seat 128, which is fixed to a second support plate 125. A driven connecting plate 126 is embedded in the deep groove ball bearing 127, and a rotation sensing plate 129 is fixed to the driven connecting plate 126. A flip origin sensor 1210 is fixed to a flip origin sensor fixing sheet metal 1211. The flip origin sensor fixing sheet metal 1211 and the right flip limit block 1213 are fixed to the right support plate 125. Reinforcing ribs 1212 are fixed to the first support plate 123 and the second support plate 125, respectively. A reducer 121 is connected to the first drive unit 120 and is fastened to the first support plate 123 by screws. A drive shaft connecting plate 122 is fixed to the reducer 121. The flip plate 124 is connected to the drive shaft connecting plate 122 and the driven connecting plate 126 on both sides. The first drive unit 120 drives the flip plate 124 to achieve the flipping action.

[0036] like Figures 2-3As shown, the clamping structure 11 includes a first mounting plate 117 and a second mounting plate 118 disposed on both sides of the cup holder 142; a first clamping slide cylinder 112 and a second clamping slide cylinder 113 are disposed opposite each other on one side of the first mounting plate 117 and the second mounting plate 118, and clamping blocks 115 are provided at the protruding ends of the first clamping slide cylinder 112 and the second clamping slide cylinder 113; a second drive unit 111 is connected to the other side of the first mounting plate 117 and the second mounting plate 118, and the second drive unit 111 is fixedly disposed on the flip plate 124, with the protruding end of the second drive unit 111 passing through the flip plate 124 and connected to the first mounting plate 117 and the second mounting plate 118. The second drive unit 111 is a lifting through-type stepper motor. In this embodiment, the second drive unit 111 is a lifting motor.

[0037] The flip plate 124 is provided with a lifting origin sensor 116 for detecting the height position of the clamping block 115. Guide assemblies 110 are provided on both sides of the flip plate 124. The guide assembly 110 includes a fixed part fixedly connected to the flip plate 124 and a movable part connected to the first mounting plate 117 and the second mounting plate 118. An ink-resistant block 114 is provided on the upper surface of the clamping block 115.

[0038] The second drive unit 111 is fixed to the flip plate 124 with screws. The lead screws of the two second drive units 111 are respectively fixed to the first mounting plate 117 and the second mounting plate 118. The guide assembly 110 is connected to the first mounting plate 117 and the second mounting plate 118 respectively. The first clamping slide cylinder 112 and the second clamping slide cylinder 113 are respectively fixed to the first mounting plate 117 and the second mounting plate 118. The clamping block 115 is connected to the left clamping slide cylinder 112 and the right clamping slide cylinder 113 with screws. The lifting through stepper motor 111 drives the first clamping slide cylinder 112 and the second clamping slide cylinder 113 to lift and lower, so as to achieve clamping of the cylindrical power battery at different heights.

[0039] One end of the cup holder 142 is open, and an anti-slip rubber pad 140 is provided on the bottom of the cup holder 142. Several magnets 141 are provided on the cup wall of the cup holder 142 and distributed around the cup holder 142.

[0040] like Figures 8-9As shown, the rotating structure 14 is used to drive the cup holder 142 on the flip plate 124 to rotate. The rotating structure 14 includes a rotating shaft 143 connected to the lower part of the cup holder 142. The rotating shaft 143 is mounted on the flip plate 124 via a bearing. A third drive unit 130 is connected to the lower part of the rotating shaft 143. A fixing plate 148 is provided on the end face of the third drive unit 130. An adapter plate 145 is provided between the motor fixing plate 148 and the flip plate 124. The output end of the third drive unit 130 is connected to the rotating shaft 143 via a coupling 147. The rotating shaft 143 and the flip plate 124 are rotatably connected via a bearing 144.

[0041] The third drive unit 130 is fixed on the fixed plate 148, which is connected to the flip plate 124 via an adapter plate 145. The third drive unit 130 and the flip plate 124 are connected via a rotary servo motor fixed plate 148 and a servo motor adapter plate 145. The coupling 147 is a diaphragm coupling, connecting the 100W servo third drive unit 130 to the rotating shaft 143. The cup holder 142 is fixed to the rotating shaft 143 with screws. The battery cell is placed inside the battery cell cup holder 142. The clamping block 115 of the clamping structure 11 clamps the battery cell. The battery cell is placed in the battery cell cup holder 142, held in place by a magnet 141. An anti-slip pad 140 increases friction. The 100W servo third drive unit 130 drives the battery cell to rotate. The third drive unit 130 rotates a rotary motor.

[0042] like Figures 6-7 As shown, the end face clamping structure 13 is located on one side of the flipping structure 12. The end face clamping structure 13 includes a base 1317, a movable plate 1315 is provided on the base 1317, a driving component is provided between the lower part of the movable plate 1315 and the base 1317, a clamping component is provided above the movable plate 1315, and a manual displacement platform 1313 is provided between the movable plate 1315 and the clamping component.

[0043] The drive assembly includes a ball screw 1318 connected to the base via a mounting bracket 1314, and the ball screw 1318 is connected to the movable plate 1315. A drive motor 1301 is provided on one side of the ball screw 1318, and a belt drive mechanism is provided between the drive motor 1301 and the ball screw 1318. The two pulleys of the belt drive mechanism are respectively connected to the output end of the drive motor 1301 and the ball screw 1318.

[0044] The clamping assembly includes an end-face clamping slide cylinder 136, the output end of which is sequentially connected to a connecting assembly and an end-face clamping block 1312; the connecting assembly includes an end-face clamping driven shaft 1311 connected to the rear end of the end-face clamping block 1312, a double-row angular contact ball bearing 139 is sleeved on the end-face clamping driven shaft 1311, the double-row angular contact ball bearing 139 is disposed in an end-face clamping bearing seat 138, and is connected to the output end of the end-face clamping slide cylinder 136 through a slide cylinder connecting plate 137.

[0045] A 100W drive motor 1301 drives a ball screw 1318 to rotate via a belt drive mechanism. The belt drive mechanism includes two keyless synchronous pulleys 132 connected to the output end of the drive motor 1301 and the end of the ball screw 1318, respectively, and a synchronous belt 133 wound around the two keyless synchronous pulleys 132. A moving plate 1315 is fixed on the nut seat of the ball screw 1318. An XZ manual displacement platform 1313 is mounted on the screw follower plate 1315. An end-face clamping slide cylinder mounting plate 135 is mounted on the XZ manual displacement platform 1313. An end-face clamping slide cylinder 136 is fixed on the end-face clamping slide cylinder mounting plate 135. An end-face clamping block 1312 is connected to the end-face clamping slide cylinder 136 via an end-face clamping driven shaft 1311, an end-face clamping bearing seat 138, and an end-face slide cylinder connecting plate 137, thereby achieving clamping of batteries of different heights. The drive motor 1301 drives the moving plate 1315 to move forward and backward. The different heights of the battery cells result in different extension lengths of the end face clamping slide cylinder and different clamping positions of the end face clamping block 1312. After reaching the clamping position set for the corresponding height battery cell, the end face clamping slide cylinder 136 is activated to clamp the battery cell.

[0046] Implementation method:

[0047] Step 1: Place the cylindrical power battery into the cell cup holder 142;

[0048] Step 2: The second drive unit 111 drives the clamping block 115 to clamp the battery at a suitable height;

[0049] Step 3: Servo motor 120 drives flip plate 124 to flip, thereby flipping the battery 90°.

[0050] Step 4: In the cell end face clamping structure 13, the 100W servo motor 130 drives the ball screw 1318 to rotate, which drives the end face clamping slide cylinder 136 to the clamping position set for the current cell. The end face clamping slide cylinder 136 moves, and the end face clamping block 1312 clamps the end face of the cell.

[0051] Step 5: Drive the clamping block 115 to release.

[0052] Step 6: The 100W servo motor 130 in the cell rotation structure 14 drives the battery to rotate.

[0053] The above embodiments should be understood as being used only to illustrate the present invention more clearly, and not to limit the scope of the present invention. After reading the present invention, any modifications of the present invention by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

Claims

1. A cylindrical power battery spraying device, comprising a base plate (15), wherein a flipping structure (12) is provided on the base plate (15), the flipping structure (12) comprising a frame, a flipping plate (124) rotatably connected to the frame, and a first driving unit (120) for driving the flipping plate (124) to rotate on the frame, characterized in that: The flip plate (124) is provided with a cup holder (142) for placing the battery in the middle; the flip plate (124) is provided with a clamping structure (11), which can clamp the battery, and the clamping structure (11) can reciprocate in one direction under the action of the second drive unit (111).

2. The cylindrical power battery spraying device according to claim 1, characterized in that: The clamping structure (11) includes a first mounting plate (117) and a second mounting plate (118) disposed on both sides of the cup holder (142); a first clamping slide cylinder (112) and a second clamping slide cylinder (113) are disposed opposite each other on one side of the first mounting plate (117) and the second mounting plate (118), and a clamping block (115) is disposed at the extended end of the first clamping slide cylinder (112) and the second clamping slide cylinder (113); A second drive unit (111) is connected to the other side of the first mounting plate (117) and the second mounting plate (118). The second drive unit (111) is fixedly mounted on the flip plate (124). The protruding end of the second drive unit (111) passes through the flip plate (124) and is connected to the first mounting plate (117) and the second mounting plate (118). A lifting origin sensor (116) for detecting the height position of the clamping block (115) is provided on the flip plate (124).

3. The cylindrical power battery spraying device according to claim 2, characterized in that: The flip plate (124) is provided with guide components (110) on both sides. The guide components (110) include a fixed component that is fixedly connected to the flip plate (124) and a movable component that is connected to the first mounting plate (117) and the second mounting plate (118). The upper surface of the clamping block (115) is provided with an ink-proof block (114).

4. The cylindrical power battery spraying device according to claim 1, characterized in that: One end of the cup holder (142) is open, and an anti-slip rubber pad (140) is provided on the bottom of the cup holder (142). Several magnets (141) are provided on the cup wall of the cup holder (142) and distributed around the cup holder (142).

5. The cylindrical power battery spraying device according to claim 1, characterized in that: The flip plate (124) is provided with a rotating structure (14) for driving the cup holder (142) to rotate; the rotating structure (14) includes a rotating shaft (143) connected to the bottom of the cup holder (142), the rotating shaft (143) is mounted on the flip plate (124) by bearings, and a third driving unit (130) is connected to the bottom of the rotating shaft (143).

6. The cylindrical power battery spraying device according to claim 5, characterized in that: A motor fixing plate (148) is provided on the end face of the third drive unit (130). A transition plate (145) is provided between the motor fixing plate (148) and the flip plate (124). The output end of the third drive unit (130) is connected to the rotating shaft (143) through a coupling (147). The rotating shaft (143) and the flip plate (124) are rotatably connected through a bearing (144).

7. The cylindrical power battery spraying device according to claim 1, characterized in that: An end face clamping structure (13) is provided on one side of the flipping structure (12). The end face clamping structure (13) includes a base (1317), a movable plate (1315) is provided on the base (1317), a driving component is provided between the lower part of the movable plate (1315) and the base (1317), a clamping component is provided above the movable plate (1315), and a manual displacement platform (1313) is provided between the movable plate (1315) and the clamping component.

8. The cylindrical power battery spraying device according to claim 7, characterized in that: The drive assembly includes a ball screw (1318) connected to the base (1317) via a mounting bracket (1314), and the ball screw (1318) is connected to the movable plate (1315). A drive motor (1301) is provided on one side of the ball screw (1318), and a belt drive mechanism is provided between the drive motor (1301) and the ball screw (1318). The belt drive mechanism includes two keyless synchronous pulleys (132) respectively connected to the output end of the drive motor (1301) and the end of the ball screw (1318), and a synchronous belt (133) wound on the two keyless synchronous pulleys (132).

9. The cylindrical power battery spraying device according to claim 7, characterized in that: The clamping assembly includes an end-face clamping slide cylinder (136), and the output end of the end-face clamping slide cylinder (136) is sequentially connected to a connecting assembly and an end-face clamping block (1312). The connecting assembly includes an end-face clamping driven shaft (1311) connected to the rear end of the end-face clamping block (1312). A double-row angular contact ball bearing (139) is sleeved on the end-face clamping driven shaft (1311). The double-row angular contact ball bearing (139) is disposed in the end-face clamping bearing seat (138) and is connected to the output end of the end-face clamping slide cylinder (136) through a slide cylinder connecting plate (137).

10. The cylindrical power battery spraying device according to claim 1, characterized in that: The frame includes a first support plate (123) and a second support plate (125) arranged opposite to each other; one end of the flip plate (124) is connected to the first drive unit (120) through a drive shaft connecting plate (122), the drive shaft connecting plate (122) is rotatably connected to the first support plate (123), and a reducer (121) is provided between the drive shaft connecting plate (122) and the first drive unit (120); the other end of the flip plate (124) is rotatably connected to the second support plate (125) through a driven connecting plate (126). Next, the driven connecting plate (126) is rotatably connected to the second support plate (125) through a deep groove ball bearing (127) and a bearing mounting seat (128); the bearing mounting seat (128) is provided with a flip origin sensor fixing sheet metal (1211) and a flip origin sensor (1210) and a rotation sensing plate (129) provided on the flip origin sensor fixing sheet metal (1211); the first support plate (123) and the second support plate (125) are respectively provided with a first flip limit block (1214) and a second flip limit block (1213).

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