Fuse porcelain needle assembling mechanism

Abstract

The utility model discloses a fuse porcelain needle assembling mechanism which comprises an assembling assembly, the assembling assembly is provided with an assembling manipulator assembly used for transferring a conductive needle from the tail end of a conductive needle straight vibrator into a ceramic sleeve on an assembling jig, and the assembling manipulator assembly comprises a suction nozzle assembly used for sucking the conductive needle. The suction nozzle assembly comprises a suction nozzle seat and a suction nozzle, the suction nozzle is provided with a vent hole used for being matched with the needle head of the conductive needle to slide, the vent hole vertically penetrates through the suction nozzle, an insertion groove is formed in the upper end face of the suction nozzle, the insertion groove radially passes through the vent hole and the suction nozzle seat to form an air suction channel extending in the vertical direction, and a needle blocking vertical piece is arranged in the insertion groove. The upper part of the suction nozzle is adaptively inserted into the lower end part of the exhaust passage; and the upper end of the vent hole is communicated with the exhaust passage. The assembling mechanism provided by the utility model is beneficial to improving the production efficiency.

Description

Technical Field

[0001] The utility model relates to the field of rotary automatic assembly equipment, and particularly relates to a fuse porcelain needle assembly mechanism. Background Art

[0002] At present, rotary automatic assembly equipment has been widely used in the assembly of electronic components. There is a kind of fuse that needs to be assembled by rotary automatic assembly equipment. This fuse is also called a thermal fuse. For example, reference can be made to the "Thermosensitive Particle Type Thermal Fuse" with the Chinese utility model patent publication number CN111105964B and the "Wafer for Thermal Fuse and Its Thermal Fuse" with the Chinese utility model patent publication number CN203521349U. The above-mentioned fuse includes a fuse housing and a porcelain needle. The porcelain needle includes a conductive needle 99 and a ceramic sleeve 98. The conductive needle 99 and the ceramic sleeve 98 need to be pre-assembled together, and then the ceramic sleeve 98 is inserted into the fuse housing. The existing rotary automatic assembly machine is used to insert the conductive needle 99 into the ceramic sleeve 98. Specifically, the ceramic sleeve 98 is first placed in the fixture on the station turntable. In the subsequent process, the vibrating disk arranges and outputs the conductive needles 99 to the linear vibrator, and the assembly manipulator transfers the conductive needle 99 at the end of the linear vibrator into the ceramic sleeve 98 in the fixture. Currently, a vacuum suction nozzle is used to pick up the conductive needle 99. However, when the vacuum suction nozzle releases the conductive needle 99, due to the relatively long length of the air extraction pipeline connected to the vacuum suction nozzle, it still takes a long time for the negative pressure to decrease after the vacuum generator is turned off, resulting in a long time required for the conductive needle 99 to fall, and the station turntable needs to stay at the assembly station for a long time. If the negative pressure output is set lower, it will cause the situation that the conductive needle 99 is not stably held. Therefore, the suction nozzle structure of the existing technology is not conducive to improving production efficiency and needs to be improved. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the existing technology and provide a fuse porcelain needle assembly mechanism, which is beneficial to improving production efficiency.

[0004] The purpose of the utility model is achieved by the following technical solutions.

[0005] The fuse porcelain needle assembly mechanism disclosed by the present utility model includes an assembly component. The assembly component is provided with an assembly manipulator component for transferring a conductive needle from the end of a conductive needle linear vibrator to a ceramic sleeve on an assembly jig. Among them, the assembly manipulator component includes a nozzle component for sucking and holding the conductive needle. The nozzle component includes a nozzle seat and a nozzle. The nozzle is formed with a vent hole for the tip of the conductive needle to slide. The vent hole penetrates the nozzle vertically. The upper end surface of the nozzle is formed with a slot. The slot radially passes through the vent hole. The nozzle seat is formed with an air extraction channel extending in the up and down direction. A needle blocking vertical piece is arranged in the slot. The upper part of the nozzle is adaptively inserted into the lower end part of the air extraction channel. The upper end of the vent hole communicates with the air extraction channel.

[0006] Preferably, a horizontally arranged stop pin is inserted into the nozzle seat. The stop pin abuts against the upper side of the needle blocking vertical piece.

[0007] Preferably, the nozzles are arranged at equal intervals in the horizontal plane. The stop pin traverses the nozzle seat.

[0008] Preferably, the number of the stop pins is set to two. The two stop pins are arranged in parallel. The upper end of the needle blocking vertical piece is flush with the upper end surface of the nozzle. The position of the stop pin corresponds to the outer radial end of the nozzle.

[0009] Preferably, the fuse porcelain needle assembly mechanism of the present utility model further includes a guide needle component. The guide needle component includes an opening and closing plate, a finger cylinder and a lifting cylinder. The number of the opening and closing plates is set to two. The finger cylinder drives the two opening and closing plates to open and close relative to each other. A guiding counterbore is formed between the two opening and closing plates for the lower part of the conductive needle to pass through adaptively during the process of inserting the conductive needle into the ceramic sleeve from top to bottom. A funnel part is formed at the upper end of the guiding counterbore. The lifting cylinder drives the finger cylinder to move up and down.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: By arranging that the nozzle is formed with a vent hole for the tip of the conductive needle to slide, the vent hole penetrates the nozzle vertically, the upper end surface of the nozzle is formed with a slot, the slot radially passes through the vent hole, the nozzle seat is formed with an air extraction channel extending in the up and down direction, a needle blocking vertical piece is arranged in the slot, the upper part of the nozzle is adaptively inserted into the lower end part of the air extraction channel, and the upper end of the vent hole communicates with the air extraction channel, the time required for the nozzle to release the conductive needle can be shortened, which is beneficial to improving the production efficiency. Description of the Drawings

[0011] Figure 1 It is a three-dimensional structural schematic diagram of a rotary table type assembly machine with the fuse porcelain needle assembly mechanism of the present utility model.

[0012] Figure 2Schematic three-dimensional structure diagram of the combination of the fuse porcelain needle assembly mechanism and the assembly jig of the present utility model.

[0013] Figure 3 Schematic cross-sectional structure diagram of the combination of the fuse porcelain needle assembly mechanism and the assembly jig of the present utility model.

[0014] Figure 4 Schematic diagram of the nozzle assembly of the present utility model sucking the conductive needle.

[0015] Figure 5 Schematic diagram of the conductive needle being inserted into the guiding counterbore of the present utility model.

[0016] Figure 6 Schematic three-dimensional structure diagram of the combination of the assembly jig, the conductive needle and the ceramic sleeve.

[0017] Figure 7 Schematic top three-dimensional structure diagram of the nozzle assembly of the present utility model.

[0018] Figure 8 Schematic top three-dimensional structure diagram of the nozzle of the present utility model.

[0019] Label description: assembly component 1; assembly manipulator component 11; bracket 110; nozzle assembly 111; nozzle seat 1110; nozzle 1111; needle blocking vertical piece 1112; air extraction channel 1113; retaining pin 1114; ventilation hole 1115; slot 1116; vertical movement cylinder 112; vertical movement seat 113; radial movement seat 114; radial movement cylinder 115; guide needle component 2; opening and closing plate 21; finger cylinder 22; connecting plate 23; lifting cylinder 24; guiding counterbore 2101; funnel part 2102; conductive needle 99; needle tip 991; ceramic sleeve 98; working station turntable 91; assembly jig 911; support groove 9111; ceramic sleeve feeding device 92; conductive needle vibrating disc 93; conductive needle linear vibrator 94; conductive needle baffle 941; through channel 942. Detailed implementation manners

[0020] The present utility model will be further described below with reference to the accompanying drawings.

[0021] The fuse porcelain needle assembly mechanism of the present utility model, as shown in Figure 1 and Figure 2As shown in the figure, it includes an assembly component 1. The assembly component 1 is provided with an assembly manipulator component 11 for transferring the conductive pin 99 from the end of the conductive pin linear oscillator 994 to the ceramic sleeve 98 on the assembly jig 911. The assembly manipulator component 11 includes a nozzle component 111 for sucking and holding the conductive pin 99. The assembly manipulator component 11 further includes a bracket 110, a vertical movement cylinder 112, a vertical movement seat 113, a radial movement seat 114 and a radial movement cylinder 115. The radial movement seat 114 is horizontally slidably arranged at the upper end of the bracket 110 through a corresponding linear guide pair. The vertical movement seat 113 is slidably arranged on one side of the radial movement seat 114 through a corresponding linear guide pair. The cylinder block of the vertical movement cylinder 112 is installed on the radial movement seat 114, and the piston rod of the vertical movement cylinder 112 is installed and connected to the upper end of the vertical movement seat 113. The piston rod of the radial movement cylinder 115 is installed and connected to the corresponding other side of the radial movement seat 114. The sliding direction of the radial movement seat 114 is substantially along the radial direction of the station mounting plate 91. As Figures 2 to 4 shown, the nozzle component 111 includes a nozzle seat 1110 and a nozzle 1111. The nozzle seat 1110 is installed at the lower end of the vertical movement seat 113 through corresponding screws, as Figure 4 , Figure 7 and Figure 8 shown, the nozzle 1111 is formed with a vent hole 1115 for the tip 991 of the conductive pin 99 to slide. The vent hole 1115 penetrates the nozzle 1111 up and down. The outer shape of the nozzle 1111 can be cylindrical. The vent hole 1115 is located at the central axis of the nozzle 1111. The upper end surface of the nozzle 1111 is formed with a slot 1116. The slot 1116 radially passes through the vent hole 1115. In other words, the slot 1116 communicates with the vent hole 1115, and the slot 1116 passes through the center of the vent hole 1115. The nozzle seat 1110 is formed with an air extraction channel 1113 extending in the up and down direction. A needle blocking vertical piece 1112 is arranged in the slot 1116. The upper end of the needle blocking vertical piece 1112 can be flush with the upper end surface of the nozzle 1111. The upper part of the nozzle 1111 is adaptively inserted into the lower end of the air extraction channel 1113. One end of a set screw screwed to the nozzle seat 1110 can be made to contact the outer wall of the nozzle 1111, so as to reliably fix the nozzle 1111 to the nozzle seat 1110. As Figure 4 and Figure 7 shown, the upper end of the vent hole 1115 communicates with the air extraction channel 1113.

[0022] As Figure 4As shown in the figure, the upper end of the air extraction channel 1113 is connected to the suction port of the vacuum generator through a trachea. The vertical movement cylinder 112 and the radial movement cylinder 115 cooperate to move the suction nozzle 1111 to directly above the conductive needle 99 at the end of the conductive needle linear vibrator 94. The solenoid valve for controlling the vacuum generator is actuated to inject compressed air into the vacuum generator, causing the suction port of the vacuum generator to extract the air in the air extraction channel 1113, creating a negative pressure in the air extraction channel 1113. Since the upper end of the ventilation hole 1115 is connected to the air extraction channel 1113, a negative pressure is also formed at the lower end of the suction nozzle 1111. As a result, the needle tip 991 at the upper end of the conductive needle 99 is sucked up by the suction nozzle 1111, and the needle tip 991 slides upward in the ventilation hole 1115 (since the outer diameter of the main body of the conductive needle 99 is significantly smaller than the outer diameter of the needle tip 991, the frictional force between the main body of the conductive needle 99 and the ventilation hole 1115 is very small). In other words, there is a gap between the cylindrical needle tip 991 and the ventilation hole 1115. For example, when the outer diameter of the needle tip 991 is 1.5 mm, the inner diameter of the ventilation hole 1115 is approximately 1.6 mm to 1.65 mm. Then, the upper end of the needle tip 991 contacts the lower end of the needle blocking vertical piece 1112, and the conductive needle 99 is blocked by the needle blocking vertical piece 1112 and stops moving upward. Since the slot 1116 passes through the ventilation hole 1115 radially, the needle blocking vertical piece 1112 only blocks a small part of the diameter position of the ventilation hole 1115. Therefore, at this time, the upper end face of the needle tip 991 is still connected to the air extraction channel 1113 over a relatively large area. Due to the gap between the needle tip 991 and the ventilation hole 1115, a relatively large positive pressure is continuously input into the air inlet of the vacuum generator, allowing a small amount of air below the suction nozzle 1111 to still flow upward along the ventilation hole 1115 and reach the air extraction channel 1113 through the above-mentioned gap. In other words, on the premise of keeping the conductive needle 99 held stably, a small amount of air leakage (in the above-mentioned gap) is allowed to exist. Then, the assembly manipulator assembly 11 raises the suction nozzle assembly 111, and the conductive needle 99 is separated from the conductive needle linear vibrator 94. When it is necessary to release the conductive needle 99, the supply of compressed air to the vacuum generator is stopped through the corresponding solenoid valve. There is still a short-term negative pressure in the air extraction channel 1113. However, since the outside air has been flowing through the above-mentioned gap previously, when the vacuum generator stops sucking air, the outside air can immediately reach above the needle tip 991 from the lower end of the ventilation hole 1115 along a short path, quickly reducing the pressure difference between the upper and lower sides of the needle tip 991. The conductive needle 99 will then fall downward under the action of gravity and separate from the suction nozzle 1111, shortening the time for the suction nozzle 1111 to release the conductive needle 99 and facilitating the improvement of production efficiency.

[0023] Furthermore, as Figure 4 and Figure 7 shown, a horizontally arranged stop pin 1114 is inserted into the suction nozzle seat 1110, and the stop pin 1114 abuts against the upper side of the needle blocking vertical piece 1112. As Figure 4As shown in the figure, in order for the nozzle 1111 to pick up the conductive pins 99, a conical counterbore structure is provided at the end of the conductive pin linear vibrator 94. The tip 991 of the first conductive pin 99 in the queue of conductive pins 99 is just located inside the lower end of the above-mentioned conical counterbore. The vertical movement cylinder 112 lowers the nozzle 1111 so that the lower end of the nozzle 1111 fits against the above-mentioned conical counterbore, making the lower end of the nozzle 1111 airtightly connected to the upper end of the above-mentioned conical counterbore, which makes it easy to suck the conductive pins 99 upward into the vent hole 1115. However, due to limited part processing accuracy and assembly accuracy, it is inevitable that the lower end of the nozzle 1111 is collided, so the stop pin vertical piece 1112 will impact the stop pin 1114. If the upper end of the stop pin vertical piece 1112 is flush with the upper end surface of the nozzle 1111, the upper end surface of the nozzle 1111 will impact the stop pin 1114. In other words, the nozzle 1111 and the stop pin vertical piece 1112 need to be replaced after long-term use, and the stop pin 1114 can also be pulled out or pushed out from the nozzle seat 1110, thus avoiding the need to replace the nozzle seat 1110; since the structure of the nozzle seat 1110 is relatively complex and the cost is high, and since the upper end of the air extraction channel 1113 of the nozzle seat 1110 is connected to a pneumatic joint and the nozzle seat 1110 is installed on the vertical movement seat 113, the structure of setting the stop pin 1114 to block and position the stop pin vertical piece 1112 is conducive to convenient maintenance.

[0024] Furthermore, as Figure 2 and Figure 7 shown, the nozzles 1111 are arranged at equal intervals in the horizontal plane. As Figure 6 shown, for example, four recesses for accommodating the ceramic sleeves 98 are provided at equal intervals along the tangential direction of the rotation of the station turntable 91 on the assembly jig 911. Accordingly, the number of nozzles 1111 is four. As Figure 7 shown, the stop pin 1114 runs across the nozzle seat 1110. In other words, one stop pin 1114 can simultaneously abut against four stop pin vertical pieces 1112, which is conducive to simplifying the assembly process of the nozzle assembly 111. The stop pin 1114 can be fixed by corresponding set screws screwed to the nozzle seat 1110.

[0025] Furthermore, as Figure 4 and Figure 7 shown, the number of stop pins 1114 is set to two. The two stop pins 1114 are arranged in parallel. The upper ends of the stop pin vertical pieces 1112 are flush with the upper end surface of the nozzle 1111. The positions of the stop pins 1114 correspond to the radially outer ends of the nozzles 1111. The outer shape of the stop pins 1114 is cylindrical, that is to say, the central axis of the stop pins 1114 is just directly above the outer edge of the nozzles 1111, which helps to reduce the obstruction effect of the stop pins 1114 on the air flow in the air extraction channel 1113.

[0026] Furthermore, as Figure 1 andFigure 2 As shown, the fuse porcelain needle assembly mechanism of the present utility model further includes a guide needle assembly 2. As Figure 3 and Figure 5 shown, the guide needle assembly 2 includes an opening and closing plate 21, a finger cylinder 22 and a lifting cylinder 24. The number of the opening and closing plates 21 is set to two. The finger cylinder 22 drives the two opening and closing plates 21 to open and close relative to each other. In other words, the two opening and closing plates 21 are respectively installed on the two clamping fingers of the finger cylinder 22. A guiding counterbore 2101 is formed between the two opening and closing plates 21 for the lower part of the conductive needle 99 to pass through adaptively during the process of inserting the ceramic sleeve 98 from top to bottom. In other words, the central axis of the guiding counterbore 2101 is just located at the joint surface of the two opening and closing plates 21 (in a state of being mutually attached). A funnel part 2102 is formed at the upper end of the guiding counterbore 2101. The lifting cylinder 24 drives the finger cylinder 22 to move up and down. Specifically, the lifting cylinder 24 can be a slide cylinder. The lifting cylinder 24 is installed on the bracket 110. A connecting plate 23 is installed on the piston rod of the lifting cylinder 24. The finger cylinder 22 is installed on the connecting plate 23.

[0027] As Figure 1 shown, the rotary automatic assembly machine includes a station turntable 91, a ceramic sleeve feeding device 92, a conductive needle vibrating disk 93 and a conductive needle linear vibrator 94. A number of sets of assembly jigs 911 are circumferentially and evenly distributed on the station turntable 91. The ceramic sleeve feeding device 92 feeds the ceramic sleeve 98 onto the corresponding assembly jig 911 (as Figure 6 shown, since the assembly jig 911 is provided with a supporting groove 9111 and the width of the supporting groove 9111 is smaller than the outer diameter of the lower end of the ceramic sleeve 98, so, as Figure 5 shown, the ceramic sleeve 98 will not fall off), and then as the station turntable 91 rotates, the assembly jig 911 circulates and switches stations, so that the assembly jig 911 loaded with the ceramic sleeve 98 is transferred to the position corresponding to the assembly component 1. The conductive needle vibrating disk 93 sorts and outputs the conductive needles 99 to the conductive needle linear vibrator 94. As Figure 3 and Figure 4 shown, a through channel 942 is provided at the top of the conductive needle linear vibrator 94. The needle head 991 of the conductive needle 99 hangs on the upper side of the upper edge of the through channel 942. The conductive needles 99 are conveyed in a queue through the conductive needle linear vibrator 94 approximately towards the center of the station turntable 91. A conductive needle baffle 941 is correspondingly provided on the conductive needle linear vibrator 94. The queue of conductive needles 99 located in the through channel 942 is intercepted by the conductive needle baffle 941. The assembly manipulator assembly 11 sucks the first conductive needle 99 in the queue of conductive needles 99 (during this period, during the process of sucking the conductive needle 99, compressed air can be injected into the vacuum generator in advance when the suction nozzle 1111 descends); as Figure 5As shown, at the same time, the lifting cylinder 24 lowers the opening and closing plate 21 to abut against the upper side of the corresponding assembly fixture 911. At this time, the guide countersunk hole 2101 is coaxial with the ceramic sleeve 98 in the assembly fixture 911. The assembly robot assembly 11 moves the conductive needle 99 to a position coaxial with the guide countersunk hole 2101, and the vertical cylinder 112 lowers the suction nozzle 1111, so that the lower part of the conductive needle 99 fits through the lower part of the corresponding guide countersunk hole 2101. In other words, the lower part of the guide countersunk hole 2101 fits the outer part of the lower end of the conductive needle 99. diameter, at this time, the lower end of the conductive needle 99 is just inserted into the upper end of the center hole of the corresponding ceramic sleeve 98, and then the suction nozzle 1111 releases the corresponding conductive needle 99. It should be noted that the conductive needle 99 cannot be released early before the lower end of the conductive needle 99 is inserted into the ceramic sleeve 98, because it will make it difficult to grasp the timing of the conductive needle 99 falling, that is, the distance between the needle head 99 and the needle blocking plate 1112 is uncertain. When the conductive needle 99 is inserted into the ceramic sleeve 98, it is easy to cause the needle head 991 to be impacted by the needle blocking plate 1112. Afterwards, the conductive needle 99 falls downward due to gravity. If the needle head 991 deviates to one side during the falling process, when the needle head 991 reaches the funnel part 2102, the inner wall of the funnel part 2102 guides the needle head 991 to align to restore the coaxiality of the conductive needle 99 and the ceramic sleeve 98, so that the conductive needle 992 can continue to slide down. Figure 5 As shown, when the needle head 99 reaches the inner step position of the guide countersunk hole 2101, the conductive needle 99 cannot continue to fall, (after the suction nozzle 1111 releases the conductive needle 99) the finger cylinder 22 delays the action to open the two opening and closing plates 21, so that the guide countersunk hole 2101 is unlocked, and the conductive needle 99 can continue to fall by gravity, the suction nozzle 1111 resets and moves, the lifting cylinder 24 lifts the opening and closing plate 21, and the work station turntable 91 rotates to transfer the ceramic sleeve 98 into which the conductive needle 99 has been inserted to the next work station. Since some conductive needles 99 may not fall by gravity to make the needle head 991 abut against the ceramic sleeve 98, a needle pushing mechanism can be set at the above-mentioned lower work station to push the needle head 991 of the conductive needle 99 down to the upper end surface of the ceramic sleeve 99. As can be seen from the above, by providing the guide needle assembly 2, on the one hand, the conductive needle 99 can be guided so that the lower end of the conductive needle 99 can be aligned and inserted into the center hole of the ceramic sleeve 98; on the other hand, since the lower part of the guide countersunk hole 2101 is adapted to the lower part of the conductive needle 99, the guide countersunk hole 2101 can support the conductive needle 99 to prevent the conductive needle 99 from bending due to resistance during the process of inserting the conductive needle 99 into the ceramic sleeve 99 through the vertical movement cylinder 112. In other words, due to processing accuracy issues, the gap between the lower end of the conductive needle 99 and the center hole of the ceramic sleeve 98 may be small.

Claims

1. A fuse porcelain pin assembly mechanism, comprising an assembly assembly (1), wherein the assembly assembly (1) is provided with an assembly robot assembly (11) for transferring a conductive pin (99) from an end of a conductive pin oscillator (994) to a ceramic sleeve (98) on an assembly jig (911), characterized in that: The assembly robot assembly (11) comprises a nozzle assembly (111) for sucking the conductive needle (99), the nozzle assembly (111) comprising a nozzle seat (1110) and a nozzle (1111), the nozzle (1111) being provided with a vent hole (1115) for sliding the needle head (991) of the conductive needle (99), the vent hole (1115) passing through the nozzle (1111) from top to bottom, and the upper end surface of the nozzle (1111) being provided with a A slot (1116) is provided, the slot (1116) radially passing through the vent hole (1115), the nozzle seat (1110) is formed with an air extraction duct (1113) extending in the up-down direction, a needle blocking vertical plate (1112) is provided in the slot (1116), the upper part of the nozzle (1111) is adapted to be inserted into the lower end of the air extraction duct (1113), and the upper end of the vent hole (1115) is connected to the air extraction duct (1113).

2. The fuse porcelain pin assembly mechanism according to claim 1, characterized in that: A horizontally arranged stop pin (1114) is inserted into the nozzle seat (1110), and the stop pin (1114) is abutted against the upper side of the needle stop vertical sheet (1112).

3. The fuse porcelain pin assembly mechanism according to claim 2, characterized in that: The suction nozzles (1111) are arranged at equal intervals in a horizontal plane, and the stop pin (1114) crosses the suction nozzle seat (1110).

4. The fuse porcelain pin assembly mechanism according to claim 3, characterized in that: The number of the stop pins (1114) is set to two, the two stop pins (1114) are arranged in parallel, the upper end of the needle stop vertical piece (1112) is arranged flush with the upper end surface of the suction nozzle (1111), and the position of the stop pin (1114) corresponds to the radial outer end of the suction nozzle (1111).

5. The fuse porcelain pin assembly mechanism according to claim 1, characterized in that: The invention also comprises a guide needle assembly (2), wherein the guide needle assembly (2) comprises an opening and closing plate (21), a finger cylinder (22) and a lifting cylinder (24), wherein the number of the opening and closing plates (21) is set to two, and the finger cylinder (22) drives the two opening and closing plates (21) to open and close each other, and a guide countersunk hole (2101) is formed between the two opening and closing plates (21) for the lower part of the conductive needle (99) to fit through during the process of inserting the lower part of the conductive needle (99) into the ceramic sleeve (98) from top to bottom, and a funnel portion (2102) is formed at the upper end of the guide countersunk hole (2101), and the lifting cylinder (24) drives the finger cylinder (22) to move up and down.

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