Bearing press fitting equipment for outer rotor fan

Abstract

This invention provides a bearing press-fitting device for an external rotor fan, belonging to the technical field of fan assembly equipment. It solves the technical problems of low automation and easy bearing damage in existing external rotor fan bearing press-fitting equipment. In this bearing press-fitting device, a feeding chute is provided along the length of the feeding seat. A discharge hole is provided on the bottom of the right side of the feeding chute. The discharge hole is coaxially arranged with the rotor positioning seat and the feeding pressure rod. The feeding pipe has an inner hole for storing the bearing. The feeding pipe is fixedly connected to the feeding seat, and the inner hole of the feeding pipe communicates with the feeding chute. The feeding pusher plate can push the bearing from below the feeding pipe to the right side of the feeding chute. The feeding baffle can cooperate with the feeding pusher plate to fix the bearing above the discharge hole. This invention achieves automatic bearing feeding through the cooperation of the feeding pipe, feeding pusher plate, and feeding baffle, and achieves bearing press-fitting through the feeding pressure rod, realizing automatic bearing feeding and automatic press-fitting with high production efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of wind turbine assembly equipment, specifically referring to a bearing press-fitting device for an external rotor wind turbine. Background Technology

[0002] External rotor motors are essential components used in industries such as ventilation, purifiers, air conditioners, and range hoods. In traditional assembly methods, because the outer diameter of the mounting shaft of the external rotor motor and the inner diameter of the bearing are interference fit, the bearing cannot be easily pressed into the mounting shaft. During installation, the operator must use a lot of force to continuously knock it, which can easily damage the bearing and cause abnormal noise.

[0003] The invention with application number 201921690565.1 discloses a tooling for pressing a bearing of an external rotor motor, including a bracket, a cylinder, an external rotor positioning seat, a first fixing clamp for mounting a first bearing, and a second fixing clamp for mounting a second bearing; the external rotor positioning seat is disposed on a base, the cylinder is disposed on a top plate, and the piston rod of the cylinder faces the external rotor positioning seat; the piston rod of the cylinder is detachably connected to the first fixing clamp or the second fixing clamp, and the axis of the second fixing clamp coincides with the axis of the external rotor, and the piston rod of the cylinder can drive the first fixing clamp or the second fixing clamp to move in a direction parallel to the axis of the external rotor.

[0004] Although the above-mentioned tooling can press the bearing into the mounting shaft of the external rotor motor, it still has the following drawbacks:

[0005] 1. Bearings need to be manually inserted into the first or second fixing clamp, making automatic bearing feeding impossible;

[0006] 2. After manually inserting the bearing, it is impossible to accurately measure or directly observe whether the bearing is level in the first or second fixed clamp. Furthermore, as the usage time increases, the first or second fixed clamp will inevitably wear down. When the bearing is placed in the first or second fixed clamp, it will inevitably tilt due to this wear, which may cause bearing damage or abnormal noise after installation. This can lead to phenomena such as bearing wear, resulting in a low yield rate after press-fitting.

[0007] The aforementioned defects mean that the tooling still requires a significant amount of manual intervention when pressing bearings, resulting in low production efficiency and yield. Summary of the Invention

[0008] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a bearing press-fitting device for an external rotor fan that can automatically feed materials with less manual intervention.

[0009] The objective of this invention can be achieved through the following technical solutions:

[0010] A bearing press-fitting device for an external rotor fan includes a rotor positioning seat, a feeding pressure rod, and a pressure rod drive component. The feeding pressure rod is located above the rotor positioning seat. The pressure rod drive component can drive the feeding pressure rod to move downward and press the bearing into the mounting shaft of the external rotor of the fan within the rotor positioning seat. The lower end face of the feeding pressure rod is provided with a receiving hole for inserting the mounting shaft of the external rotor fan. The device is characterized by including a feeding seat, a feeding pipe, a feeding push plate, and a feeding baffle. The feeding seat is located between the feeding pressure rod and the rotor positioning seat. The feeding seat has a feeding groove along its length. The bottom of the right side of the feeding groove has a... The feeding hole is coaxially arranged with the rotor positioning seat and the feeding pressure rod. The feeding tube has an inner hole for storing the bearing. The feeding tube is fixedly connected to the feeding seat. The inner hole of the feeding tube communicates with the feeding chute. The feeding push plate can push the bearing from below the feeding tube to the right side of the feeding chute. The feeding baffle can cooperate with the feeding push plate to fix the bearing above the feeding hole. An elastic positioning block is fixedly connected to the right end of the feeding chute. An elastic element is provided between the elastic positioning block and the feeding baffle to drive the feeding baffle to move to the left. The initial position of the left end of the feeding baffle is located at the left end of the feeding hole.

[0011] This bearing press-fitting equipment achieves automatic bearing feeding through the cooperation of a feeding pipe, a feeding pusher plate, and a feeding baffle. The bearing is then pressed and fixed using a feeding pressure rod. The structure is simple, requires minimal manual intervention, and enables automatic feeding and pressing, resulting in high production efficiency. The inner hole of the feeding pipe stores the bearing, allowing for automatic unloading using its own weight, eliminating the need for additional power. The feeding chute and feeding pusher plate work together to deliver the bearing to the unloading hole, while the feeding pusher plate and feeding baffle plate work together to dynamically fix the bearing, ensuring it remains horizontal even when positioned directly above the unloading hole. This effectively prevents bearing damage or noise caused by tilting during pressing, thus improving the yield rate of the pressed bearings.

[0012] The elastic element, in conjunction with the feeding baffle, exerts a leftward force on the bearing after it contacts the baffle. This force gradually increases as the bearing moves to the right. The process of the bearing gradually moving above the discharge hole after contacting the baffle is a process of the bearing gradually becoming suspended. The increasing force exerted by the feeding baffle on the bearing provides a high degree of fixation during this suspension, preventing the bearing from tilting as it moves above the discharge hole. This improves the yield rate of the bearing press-fitting equipment, addressing a key challenge that traditional press-fitting equipment struggles with for automatic feeding. Furthermore, the elastic element design buffers the force generated at the moment of contact between the bearing and the feeding baffle, preventing damage to the bearing, feeding baffle, or feeding pusher caused by rigid contact. It also avoids bearing tilting issues caused by rigid contact, further enhancing the yield rate of the bearing press-fitting equipment.

[0013] In the bearing press-fitting equipment for an external rotor fan described above, the right end of the feeding push plate is provided with an arc-shaped groove, which mates with the outer circumferential surface of the bearing.

[0014] The aforementioned arc-shaped groove design allows the feeding pusher plate to fit more closely to the outer circumference of the bearing, thus providing better support for the bearing.

[0015] In the aforementioned bearing press-fitting equipment for an external rotor fan, a limiting protrusion is fixedly connected to the feeding push plate, and a feeding limiting plate is fixedly connected to the feeding seat. The feeding limiting plate is located on the left side of the feeding pipe, and a limiting rod and a buffer are fixedly connected to the feeding limiting plate. The left ends of the limiting rod and the buffer can abut against the limiting protrusion. The left end of the buffer protrudes beyond the left end of the limiting rod. When the limiting protrusion abuts against the limiting rod, the feeding push plate pushes the bearing to directly above the discharge hole.

[0016] The feeding limit plate and limit rod work together to limit the movement of the feeding push plate, ensuring that the feeding push plate stops moving when it pushes the bearing above the unloading hole. When this bearing press-fitting equipment is working, the aforementioned limit protrusion first contacts the buffer, and then contacts the limit rod and stops moving. The buffer can play a good buffering role, greatly reducing the impact force generated when the limit protrusion contacts the limit rod, effectively avoiding the vibration of the feeding push plate due to the large impact force when the limit protrusion contacts the limit rod. This vibration may cause the bearing to tilt. Therefore, the design of the buffer not only plays a good protective role for the feeding push plate, bearing, limit protrusion and limit rod, avoiding wear due to excessive impact force, but also ensures that the bearing is in close contact with the bottom of the feeding chute throughout the feeding process and always remains in a horizontal state, which is conducive to improving the yield of this bearing press-fitting equipment.

[0017] In the bearing press-fitting equipment for an external rotor fan described above, at least three guide ribs are provided on the wall of the inner hole. The guide ribs are spaced apart circumferentially along the wall of the hole, and the length direction of the guide ribs is parallel to the axial direction of the inner hole.

[0018] The design of the three guide ribs mentioned above can support the bearing and reduce the contact area between the feeding tube and the outer circumference of the bearing, thereby reducing the sliding friction between the feeding tube and the bearing. This makes it easier for the bearing to slide down along the axis of the inner hole. At the same time, it also creates a larger air gap between the outer circumference of the bearing and the inner hole wall, avoiding the problem of the bearing being unable to slide down smoothly due to negative pressure caused by a small gap. This makes the feeding action smoother and more seamless.

[0019] In the bearing press-fitting equipment for an external rotor fan described above, positioning slots are provided on both sides of the feeding seat, and an outwardly protruding connecting part is formed at the lower end of the feeding pipe. A proximity switch capable of detecting whether there is a bearing in the feeding chute is provided on the connecting part. Two downwardly protruding positioning blocks are provided at the lower end of the connecting part. The positioning blocks can be inserted into the corresponding positioning slots. The connecting part and the feeding seat are fixedly connected by fasteners that penetrate the connecting part vertically.

[0020] The fasteners mentioned above can be screws or bolts. The slot design facilitates the connection between the feeding tube and the feeding seat. After the feeding tube and the feeding seat are connected, the connection between the inner hole and the feeding slide is covered by the feeding tube and cannot be directly observed. It is difficult to determine whether the inner hole is aligned with the feeding slide. This bearing press-fitting equipment designs the dimensions of the feeding seat and the feeding tube so that when the positioning block is inserted into the positioning slot, the inner hole is aligned with the feeding slide, making the assembly between the feeding tube and the feeding seat more precise and faster. The aforementioned proximity switch design can be used to detect whether there is a bearing in the feeding slide. When there is no bearing, it outputs a signal to the alarm device, such as an alarm light or a buzzer.

[0021] In the bearing press-fitting equipment for an external rotor fan described above, a cover plate is fixed on the upper side of the feeding seat. The right end of the cover plate is located to the right of the feeding hole. The cover plate is provided with a through hole coaxially arranged with the feeding hole. The diameter of the through hole is larger than the diameter of the feeding pressure rod.

[0022] This cover plate can vertically position the feeding push plate, feeding baffle, and bearing, preventing vertical displacement during left and right movements. This ensures that the bearing remains horizontal throughout the feeding process, which helps improve stability during feeding and the yield rate after pressing.

[0023] In the bearing press-fitting equipment for an external rotor fan described above, the pressure rod drive is fixedly connected to the drive fixing plate, a horizontally arranged bearing pressure plate is fixedly connected to the upper part of the feeding pressure rod, and at least three drive guide rods are fixed on the drive fixing plate. The pressure rod drive can drive the bearing pressure plate to move up and down along the drive guide rods.

[0024] The three drive guide rods are arranged in a triangular pattern. These three guide rods provide better and more stable guidance for the bearing pressure plate, ensuring that the bearing pressure plate remains horizontal during its up-and-down movement.

[0025] In the aforementioned bearing press-fitting equipment for an external rotor fan, the upper part of the feeding pressure rod is fixedly connected to the bearing pressure plate. A conical groove is provided in the middle of the upper side of the bearing pressure plate or on the upper end face of the feeding pressure rod. A spherical component is installed in the conical groove. A connecting plate is fixedly connected to the upper side of the bearing pressure plate. A vertical strip hole is provided on the upper part of the connecting plate. The driving rod of the pressure rod drive component and the connecting plate are vertically movable through the strip hole. When the driving rod moves down, it can abut against the upper end of the feeding pressure rod. When the driving rod moves up, it can separate from the feeding pressure rod.

[0026] The upper end of the aforementioned feeding pressure rod is fixedly connected to the lower side of the bearing pressure plate, or the feeding pressure rod passes through the bearing pressure plate and is fixedly connected to the bearing pressure plate. The aforementioned pressure rod driving component is a cylinder or hydraulic cylinder. Due to the limitations of the assembly accuracy of the pressure rod driving component or its own assembly, the driving rod of the pressure rod driving component cannot be in a perfectly vertical state after it is fixed, and may be slightly tilted. If the driving rod is directly rigidly connected to the feeding pressure rod, two results will occur: First, the feeding pressure rod will tilt along with the driving rod. The tilted feeding pressure rod is prone to uneven force on the bearing and damage during bearing pressing; Second, the feeding pressure rod continues to remain in a vertical state, and the connection between the feeding pressure rod and the driving rod will bend and break after long-term use, thereby affecting the normal operation of this bearing pressing equipment.

[0027] This bearing press-fitting equipment effectively avoids the two problems mentioned above by setting a tapered groove on the upper side of the bearing press plate, installing a spherical component inside the tapered groove, and dynamically separating the drive rod from the spherical component.

[0028] When the drive rod moves down, if the drive rod is slightly tilted, after the drive rod comes into contact with the spherical part, because the spherical part is spherical, the contact point between the drive rod and the spherical part gradually moves closer to the central axis of the feeding rod during the downward movement. The entire process will not cause the feeding rod to tilt.

[0029] When the drive rod moves down, it separates from the spherical part. When the connection between the drive rod and the connecting plate moves to the upper end of the strip hole, the drive rod pulls the connecting part up, thereby driving the bearing pressure rod up. The entire process does not involve contact with the spherical part and will not cause the feeding pressure rod to tilt.

[0030] In the bearing press-fitting equipment for an external rotor fan described above, the loading seat is provided with at least three seat guide holes, which are located at the left and right ends of the loading seat. The drive component fixing plate is provided with a seat guide rod that cooperates with the seat guide holes. The seat guide rod can be inserted into the seat guide holes. A seat drive component is fixed on the drive component fixing plate. The seat drive component is connected to the loading seat and drives the loading seat to move up and down.

[0031] The aforementioned seat drive component and seat guide rod work together to enable the loading seat to move vertically up and down, ensuring that the loading seat will not tilt during the movement. Before pressing the bearing down, this bearing pressing equipment needs to move the loading seat down first, so that the distance between the lower edge of the discharge hole and the mounting shaft of the fan's outer rotor is less than the thickness of the bearing. This ensures that the bearing can be vertically pressed into place on the mounting shaft, preventing the bearing from tilting during the pressing process. This helps to improve the stability of the pressing process and the yield rate after pressing.

[0032] In the aforementioned bearing press-fitting equipment for an external rotor fan, the rotor positioning seat is mounted on a support plate, the support plate has mounting holes, the upper end of the mounting holes has a circular step, a circular protruding ring is fixed on the outer side wall of the rotor positioning seat, the circular protruding ring can be placed on the circular step, the lower end of the rotor positioning seat protrudes from the lower side of the support plate, and a lifting positioning mechanism is provided below the rotor positioning seat to drive the rotor positioning seat away from the support plate and maintain a horizontal state.

[0033] The aforementioned lifting and positioning mechanism can horizontally lift the rotor positioning seat to detach it from the pallet or carry the pallet away from the conveyor track, thus avoiding the influence of the conveyor track on the rotor positioning seat and keeping the rotor positioning seat horizontal. This prevents the installation shaft of the fan's outer rotor from tilting due to the tilt of the rotor positioning seat, which could cause the bearing to be damaged during the pressing process and affect the yield rate after pressing.

[0034] In the aforementioned bearing press-fitting equipment for an external rotor fan, the lifting and positioning mechanism includes a lifting panel, a lifting cylinder, a guide positioning block, at least three lifting guide rods, and a lifting positioning seat. The rotor positioning seat has at least three insertion holes spaced circumferentially. The lifting panel is horizontally positioned and located directly below the loading seat. Insertion pins that engage with the insertion holes are fixedly connected to the upper side of the lifting panel. The lifting cylinder is located below the lifting panel and drives the lifting panel to move up and down. The guide positioning block is fixedly connected to the base. The upper end of the lifting guide rod is fixedly connected to the lifting panel, and the lower end is inserted into the guide positioning block and can move up and down relative to the guide positioning block.

[0035] One of the lifting links has its upper end hinged to the lifting panel, and the other lifting link has its lower end hinged to the base. The other ends of both lifting links are hinged to the lifting hinge. The lifting cylinder is mounted horizontally on the base. The drive rod of the lifting cylinder is connected to the lifting hinge and drives the lifting hinge to move horizontally. The lifting positioning seat is fixed on the base. The upper end of the lifting positioning seat can abut against the lower side of the lifting panel. A horizontal limiting rod is provided on the side of the lifting positioning seat. The horizontal limiting rod can abut against the lifting hinge when the two lifting links are in a straight line.

[0036] The aforementioned insertion holes and plugs can be used to horizontally position the rotor positioning seat, ensuring that the mounting shaft, unloading hole, and pressure rod of the fan's outer rotor are coaxial during press fitting; the guide positioning block and the lifting guide rod can prevent the lifting panel from tilting during its up-and-down movement.

[0037] The two lifting linkages and lifting hinges mentioned above form a two-bar linkage. During operation, it is only necessary to lift the rotor positioning seat and / or the support plate; the lifting distance does not need to be excessive. The design of the lifting positioning seat limits the minimum height to which the lifting panel can descend, and the extension and retraction of the two-bar linkage cannot be too long. If the lifting panel descends too much, it requires ten times the normal cylinder force to lift it back up. Furthermore, during press-fitting, the two lifting linkages must not only bear the weight of the lifting panel, lifting guide rod, support plate, rotor positioning seat, and the outer rotor of the motor, but also the pressure applied by the positioning column. Therefore… The two lifting links need to have good support. If the two lifting links are coaxial and straight, the force acting on the lifting links will not be distributed in the horizontal direction, and the lifting links will not move in the horizontal direction, thus giving the two lifting links good support. If the two lifting links are not straight and have an angle of less than 180° between them, then when the positioning column applies pressure to the outer rotor of the motor, the lifting links are likely to be compressed, causing the lifting hinge to move towards the lifting cylinder, which will cause the lifting panel to drop. The support of the lifting links is poor, and the pressing process is unstable.

[0038] The working principle of this bearing press-fitting equipment is as follows:

[0039] The rotor positioning seat, which holds the outer rotor of the fan, moves along the production line to directly below the loading seat under the drive of the pallet. The stopper on the production line is activated to stop the pallet from moving forward. The lifting mechanism first lifts the pallet or rotor positioning seat, so that the pallet is removed from the production line.

[0040] The seat drive unit drives the loading seat to move downward, so that the lower side of the loading seat abuts against the upper edge of the outer rotor of the fan;

[0041] Next, the feeding pusher plate pushes the bearing located in the feeding chute to the right until the bearing contacts the feeding baffle and continues to move to the right until it is directly above the discharge hole;

[0042] Then the pressure rod drive unit drives the feeding pressure rod to move down. The lower end of the feeding pressure rod contacts the bearing fixed between the feeding pressure rod and the feeding top rod and pushes the bearing down. Under the push of the feeding pressure rod, the bearing enters the discharge hole and is sleeved on the mounting shaft until it is pushed to the designated position by the feeding pressure rod.

[0043] The pressure bar drive unit drives the feeding pressure bar to move upward and return to the initial position, and then the seat drive unit drives the feeding seat to move upward and return to the initial position;

[0044] Finally, the lifting mechanism places the rotor positioning seat on the pallet, and the pallet moves along the production line to the next station. Another pallet carrying the fan outer rotor to be assembled moves under the loading seat under the drive of the production line, and the above pressing process is repeated.

[0045] Compared with the prior art, the technical effects of the present invention are as follows:

[0046] 1. This bearing press-fitting equipment achieves automatic bearing feeding through the cooperation of a feeding pipe, a feeding push plate, and a feeding baffle. The bearing is pressed and fixed by a feeding pressure rod. The structure is simple, requires less manual intervention, and can achieve automatic bearing feeding and press-fitting, resulting in high production efficiency.

[0047] 2. The inner hole of the feeding pipe in this bearing press-fitting equipment is used to store the bearing. The bearing can be automatically unloaded by its own weight without the need for additional power.

[0048] 3. In this bearing press-fitting equipment, the feeding chute and feeding push plate work together to deliver the bearing to the unloading hole. The feeding push plate and feeding baffle work together to achieve dynamic fixation of the bearing, ensuring that the bearing remains horizontal when it moves directly above the unloading hole. This effectively prevents the bearing from being damaged or producing abnormal noise due to tilting during press-fitting, and helps to improve the yield rate of the bearing after press-fitting. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0050] Figure 2 This is an overall sectional view of the present invention.

[0051] Figure 3 This is a structural schematic diagram of the feeding seat and pressure rod drive component of the present invention.

[0052] Figure 4 This is a schematic diagram of the connection structure at the bearing pressure plate of the present invention.

[0053] Figure 5 This is a schematic diagram of the feeding seat of the present invention.

[0054] Figure 6 This is a schematic diagram of the structure of the feeding pusher plate and the feeding baffle of the present invention.

[0055] Figure 7 This is a schematic diagram of the feeding pipe of the present invention.

[0056] Figure 8 This is a schematic diagram of the lifting and positioning mechanism of the present invention.

[0057] Figure 9 This is a partial cross-sectional view of the feed hole of the present invention.

[0058] Figure 10 This is a schematic diagram of the lifting mechanism of the present invention.

[0059] Figure 11 This is a partial cross-sectional view of the connection between the rotor positioning seat and the support plate of the present invention.

[0060] Figure 12 This is a schematic diagram of the connection structure of the pallet, rotor positioning seat and fan outer rotor of the present invention.

[0061] Figure 13 yes Figure 2 A magnified view of a portion of point A in the middle.

[0062] In the diagram, 1. Drive component fixing plate; 11. Pressure rod drive component; 111. Drive rod; 12. Feeding pressure rod; 121. Accommodating hole; 122. Spherical component; 13. Bearing pressure plate; 131. Conical groove; 14. Drive guide rod; 15. Connecting plate; 151. Strip hole; 16. Seat guide rod; 17. Seat drive component; 2. Feeding seat; 21. Feeding tube; 211. Inner hole; 212. Guide rib; 213. Connecting part; 214. Positioning block; 215. Proximity switch; 22. Feeding push plate; 221. Limiting protrusion; 222. Arc-shaped groove; 23. Feeding baffle; 231. Elastic positioning block; 232. Elastic component; 24. Feeding slide; 2 41. Feeding hole; 25. Feeding limit plate; 251. Limiting rod; 252. Buffer; 26. Positioning slot; 27. Cover plate; 271. Through hole; 28. Seat guide hole; 3. Rotor positioning seat; 31. Circular convex ring; 32. Insertion hole; 4. Support plate; 41. Mounting hole; 42. Circular step; 5. Lifting positioning mechanism; 51. Lifting panel; 511. Insertion post; 52. Lifting cylinder; 53. Guide positioning block; 54. Lifting guide rod; 55. Lifting positioning seat; 551. Lateral limit rod; 552. Damper; 56. Base; 57. Lifting connecting rod; 58. Lifting hinge; 9. External rotor of fan; 91. Mounting shaft; 10. Bearing. Detailed Implementation

[0063] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0064] The bearing press-fitting equipment for this external rotor fan includes a rotor positioning seat 3, a feeding pressure rod 12, a pressure rod drive component 11, a feeding seat 2, a feeding pipe 21, a feeding push plate 22, and a feeding baffle 23. The feeding pressure rod 12 is located above the rotor positioning seat 3. The pressure rod drive component 11 can drive the feeding pressure rod 12 to move downward and press the bearing 10 into the mounting shaft 91 of the external rotor 9 of the fan inside the rotor positioning seat 3. The lower end face of the feeding pressure rod 12 is provided with a receiving hole 121 for the mounting shaft 91 of the external rotor fan to be inserted. The feeding seat 2 is located between the feeding pressure rod 12 and the rotor positioning seat 3. The upper part of the feed tube 21 has a feeding chute 24 along its length. A discharge hole 241 is located on the bottom of the right side of the feeding chute 24. The discharge hole 241 is coaxially arranged with the rotor positioning seat 3 and the feeding pressure rod 12. The feeding tube 21 has an inner hole 211 for storing the bearing 10. The feeding tube 21 is fixedly connected to the feeding seat 2. The inner hole 211 of the feeding tube 21 communicates with the feeding chute 24. The feeding push plate 22 can push the bearing 10 from below the feeding tube 21 to the right side of the feeding chute 24. The feeding baffle 23 cooperates with the feeding push plate 22 to fix the bearing 10 above the discharge hole 241. This bearing pressing equipment achieves automatic feeding of the bearing 10 through the cooperation of the feeding tube 21, the feeding push plate 22, and the feeding baffle 23. The pressing and fixing of the bearing 10 is achieved through the feeding pressure rod 12. The structure is simple, requires less manual intervention, and can achieve automatic feeding and pressing of the bearing 10, resulting in high production efficiency. The inner hole 211 of the feeding pipe 21 is used to store the bearing 10. The bearing 10 can be automatically unloaded by its own weight without the need for additional power. The feeding chute 24 and the feeding push plate 22 work together to send the bearing 10 to the unloading hole 241. The feeding push plate 22 and the feeding baffle 23 work together to achieve dynamic fixation of the bearing 10, ensuring that the bearing 10 remains horizontal when it moves directly above the unloading hole 241. This effectively prevents the bearing 10 from being damaged or producing abnormal noise due to tilting during pressing, which helps to improve the yield rate of the bearing pressing equipment.

[0065] like Figure 6As shown, the right end of the feeding push plate 22 is provided with an arc-shaped groove 222, which mates with the outer circumferential surface of the bearing 10. An elastic positioning block 231 is fixedly connected to the right end of the feeding slide 24. An elastic element 232 is provided between the elastic positioning block 231 and the feeding baffle 23 to drive the feeding baffle 23 to move to the left. The initial position of the left end of the feeding baffle 23 is located at the left end of the discharge hole 241. A limit protrusion 221 is fixedly connected to the feeding push plate 22. A feeding limit plate 25 is fixed on the seat 2. The feeding limit plate 25 is located on the left side of the feeding tube 21. The feeding limit plate 25 is fixedly connected to the limit rod 251 and the buffer 252. The left ends of the limit rod 251 and the buffer 252 can abut against the limit protrusion 221. The left end of the buffer 252 protrudes from the left end of the limit rod 251. When the limit protrusion 221 abuts against the limit rod 251, the feeding push plate 22 pushes the bearing 10 to directly above the discharge hole 241.

[0066] The design of the aforementioned arc-shaped groove 222 allows the feeding push plate 22 to fit more closely to the outer circumferential surface of the bearing 10, providing better support for the bearing 10. The elastic element 232, in conjunction with the feeding baffle 23, exerts a leftward force on the bearing 10 after it contacts the feeding baffle 23. This force gradually increases as the bearing 10 moves to the right. The process of the bearing 10 gradually moving above the discharge hole 241 after contacting the feeding baffle 23 is a process in which the bearing 10 gradually becomes suspended. The gradually increasing force exerted by the feeding baffle 23 on the bearing 10 provides a high degree of fixation for the bearing 10 during this suspension. The function of this elastic element 232 is to prevent the bearing 10 from tilting during its movement above the feeding hole 241, which helps improve the yield rate of the bearing press-fitting equipment. This is precisely the difficulty that traditional press-fitting equipment cannot solve in terms of automatic feeding. At the same time, the design of the elastic element 232 can also buffer the force generated when the bearing 10 contacts the feeding baffle 23, avoiding damage to the bearing 10, feeding baffle 23 or feeding push plate 22 caused by rigid contact. It can also avoid problems such as the bearing 10 tilting and the ball track of the bearing 10 being damaged by external force caused by rigid contact, which helps to further improve the yield rate of the bearing press-fitting equipment. The loading limit plate 25 and the limit rod 251 work together to limit the movement of the loading push plate 22, ensuring that the loading push plate 22 stops moving when it pushes the bearing 10 above the unloading hole 241. During operation of this bearing press-fitting equipment, the aforementioned limit protrusion 221 first contacts the buffer 252, and then contacts the limit rod 251 and stops moving. The buffer 252 provides good cushioning, greatly reducing the impact force generated when the limit protrusion 221 contacts the limit rod 251, effectively preventing the limit protrusion from moving. When block 221 contacts limit rod 251, the feeding push plate 22 vibrates due to the large impact force. This vibration may cause the bearing 10 to tilt. Therefore, the design of buffer 252 can not only provide good protection for feeding push plate 22, bearing 10, limit protrusion 221 and limit rod 251 to avoid excessive impact force and wear, but also ensure that bearing 10 is in close contact with the bottom of feeding chute 24 throughout the feeding process and always remains horizontal, which is conducive to improving the yield of this bearing press-fitting equipment.

[0067] like Figure 7As shown, at least three guide ribs 212 are provided on the wall of the inner hole 211. The guide ribs 212 are spaced apart circumferentially along the wall of the hole, and the length direction of the guide ribs 212 is parallel to the axial direction of the inner hole 211. Positioning slots 26 are provided on both sides of the feeding seat 2. The lower end of the feeding tube 21 is formed with an outwardly protruding connecting part 213. The connecting part 213 is provided with a proximity switch 215 that can detect whether there is a bearing 10 in the feeding chute 24. The lower end of the connecting part 213 is provided with two downwardly protruding positioning blocks 214. The positioning blocks 214 can be inserted into the corresponding positioning slots 26. The connecting part 213 and the feeding seat 2 are fixedly connected by fasteners that penetrate the connecting part 213 vertically. The design of the three guide ribs 212 can support the bearing 10 and reduce the contact area between the feed tube 21 and the outer circumference of the bearing 10, thereby reducing the sliding friction between the feed tube 21 and the bearing 10. This makes it easier for the bearing 10 to slide down along the axis of the inner hole 211. At the same time, it also creates a larger air gap between the outer circumference of the bearing 10 and the hole wall of the inner hole 211, avoiding the problem of the bearing 10 being unable to slide down smoothly due to negative pressure caused by a small gap. This makes the feeding action smoother and more seamless. The fasteners mentioned above can be screws or bolts. The slot design facilitates the connection between the feeding tube 21 and the feeding seat 2. After the feeding tube 21 is connected to the feeding seat 2, the connection between the inner hole 211 and the feeding slide 24 is covered by the feeding tube 21 and cannot be directly observed. It is difficult to determine whether the inner hole 211 is exactly aligned with the feeding slide 24. This bearing press-fitting equipment designs the dimensions of the feeding seat 2 and the feeding tube 21 so that when the positioning block 214 is inserted into the positioning slot 26, the inner hole 211 is exactly aligned with the feeding slide 24, making the assembly between the feeding tube 21 and the feeding seat 2 more accurate and faster. The aforementioned proximity switch 215 is designed to detect whether there is a bearing 10 in the feeding slide 24. When there is no bearing 10, it outputs a signal to the alarm device, such as an alarm light or a buzzer.

[0068] like Figure 9 As shown, a cover plate 27 is fixed to the upper side of the feeding seat 2. The right end of the cover plate 27 is located to the right of the discharge hole 241. The cover plate 27 has a through hole 271 coaxially arranged with the discharge hole 241. The diameter of the through hole 271 is larger than the diameter of the feeding pressure rod 12. This cover plate 27 can vertically position the feeding push plate 22, the feeding baffle 23, and the bearing 10, preventing vertical displacement during the left and right movement of the three components. This ensures that the bearing 10 remains horizontal throughout the feeding process, which is beneficial to improving the stability of the feeding process and the yield rate after pressing.

[0069] like Figure 3 and Figure 4As shown, the pressure rod drive component 11 is fixedly connected to the drive component fixing plate 1. The upper part of the feeding pressure rod 12 is fixedly connected to a horizontally arranged bearing pressure plate 13. At least three drive guide rods 14 are fixed on the drive component fixing plate 1. The pressure rod drive component 11 can drive the bearing pressure plate 13 to move up and down along the drive guide rods 14. The upper end of the feeding pressure rod 12 is fixedly connected to the bearing pressure plate 13. A tapered groove 131 is provided in the middle of the upper side of the bearing pressure plate 13. A spherical component 122 is installed in the tapered groove 131. A connecting plate 15 is fixedly connected to the upper side of the bearing pressure plate 13. A vertical strip hole 151 is provided in the upper part of the connecting plate 15. The drive rod 111 of the pressure rod drive component 11 and the connecting plate 15 are vertically movable through the strip hole 151. When the drive rod 111 moves down, it can abut against the upper end of the feeding pressure rod 12. When the drive rod 111 moves up, it can separate from the feeding pressure rod 12.

[0070] The three drive guide rods 14 are arranged in a triangular pattern. These three guide rods provide better and more stable guidance for the bearing pressure plate 13, ensuring that the bearing pressure plate 13 remains horizontal during its up-and-down movement. The aforementioned pressure rod drive component 11 is a cylinder or hydraulic cylinder. Due to limitations in the assembly precision of the pressure rod drive component 11, its drive rod 111 may not be perfectly vertical after the pressure rod drive component 11 is fixed, and may have a slight tilt. If the drive rod 111 is directly rigidly connected to the feeding pressure rod 12, two results will occur: 1. The feeding pressure rod 12... The first problem is that the feeding rod 12 tilts with the drive rod 111, which can easily cause uneven stress on the bearing 10 during pressing and damage. The second problem is that if the feeding rod 12 remains vertical, the connection between the feeding rod 12 and the drive rod 111 will bend and break after long-term use, thus affecting the normal operation of the bearing pressing equipment. The bearing pressing equipment avoids the above two problems by setting a tapered groove 131 on the upper side of the bearing pressure plate 13 and installing a spherical part 122 in the tapered groove 131 to dynamically separate the drive rod 111 from the spherical part 122.

[0071] When the drive rod 111 moves down, if the drive rod 111 is slightly tilted, after the drive rod 111 comes into contact with the spherical part 122, since the spherical part 122 is spherical, the contact point between the drive rod 111 and the spherical part 122 gradually moves closer to the central axis of the feeding rod 12 during the downward movement, and the feeding rod 12 will not tilt during the whole process.

[0072] When the drive rod 111 moves down, it separates from the spherical part 122. When the connection between the drive rod 111 and the connecting plate 15 moves to the upper end of the strip hole 151, the drive rod 111 pulls the connecting part 213 up, thereby driving the bearing 10 pressure rod up. The entire process does not contact the spherical part 122 and will not cause the feeding pressure rod 12 to tilt.

[0073] like Figure 1 and Figure 3 As shown, the loading seat 2 is provided with at least three seat guide holes 28. The seat guide holes 28 are located at the left end and the right end of the loading seat 2. The drive component fixing plate 1 is provided with a seat guide rod 16 that cooperates with the seat guide hole 28. The seat guide rod 16 can be inserted into the seat guide hole 28. A seat drive component 17 is fixed on the drive component fixing plate 1. The seat drive component 17 is connected to the loading seat 2 and drives the loading seat 2 to move up and down. The aforementioned seat drive component 17 and seat guide rod 16 cooperate to enable the loading seat 2 to move vertically up and down, and ensure that the loading seat 2 will not tilt during the movement. Before pressing the bearing 10 downward, this bearing pressing equipment needs to move the loading seat 2 downward so that the distance between the lower edge of the discharge hole 241 and the mounting shaft 91 of the fan outer rotor 9 is less than the thickness of the bearing 10, thereby ensuring that the bearing 10 can be vertically pressed into the mounting shaft 91, avoiding the bearing 10 tilting during the pressing process, which is beneficial to improving the stability of pressing and the yield rate after pressing. Furthermore, the lower side of the aforementioned loading seat 2 can be tightly attached to the upper edge of the fan outer rotor 9, fixing the outer rotor and placing it horizontally, so that the mounting shaft 91 can be vertical, which is beneficial to improving the stability of pressing and the yield rate.

[0074] like Figure 2 and Figure 8 As shown, the rotor positioning seat 3 is mounted on the support plate 4. The support plate 4 has a mounting hole 41, and a circular step 42 is provided at the upper end of the mounting hole 41. A circular protruding ring 31 is fixed on the outer wall of the rotor positioning seat 3. The circular protruding ring 31 can be placed on the circular step 42. The lower end of the rotor positioning seat 3 protrudes from the lower side of the support plate 4. A lifting and positioning mechanism 5 is provided below the rotor positioning seat 3, which can drive the rotor positioning seat 3 to detach from the support plate 4 and keep it in a horizontal state. The above-mentioned lifting and positioning mechanism 5 can lift the rotor positioning seat 3 horizontally to detach it from the support plate 4 or carry the support plate 4 away from the conveyor track. It can avoid the conveyor track from affecting the rotor positioning seat 3, keep the rotor positioning seat 3 horizontal, and avoid the installation shaft 91 of the outer rotor 9 of the fan tilting due to the tilt of the rotor positioning seat 3, which would cause the bearing 10 to be damaged during the pressing process and affect the yield rate after pressing.

[0075] Furthermore, the lifting and positioning mechanism 5 includes a lifting panel 51, a lifting cylinder 52, a guide positioning block 53, at least three lifting guide rods 54, and a lifting positioning seat 55. The rotor positioning seat 3 has at least three insertion holes 32 spaced circumferentially. The lifting panel 51 is horizontally positioned and located directly below the loading seat 2. Insertion posts 511 that engage with the insertion holes 32 are fixedly connected to the upper side of the lifting panel 51. The lifting cylinder 52 is located below the lifting panel 51 and drives the lifting panel 51 to move up and down. The guide positioning block 53 is fixedly connected to the base 56. The upper end of the lifting guide rod 54 is fixedly connected to the lifting panel 51, and the lower end inserts into the guide positioning block 53 for relative guiding and positioning. Block 53 moves up and down; the upper end of one lifting link 57 is hinged to the lifting panel 51, and the lower end of the other lifting link 57 is hinged to the base 56. The other ends of both lifting links 57 are hinged to the lifting hinge 58. The lifting cylinder 52 is horizontally mounted on the base 56. The drive rod of the lifting cylinder 52 is connected to the lifting hinge 58 and drives the lifting hinge 58 to move horizontally. The lifting positioning seat 55 is fixed on the base 56. The upper end of the lifting positioning seat 55 can abut against the lower side of the lifting panel 51. A horizontal limiting rod 551 is provided on the side of the lifting positioning seat 55. The horizontal limiting rod 551 can abut against the lifting hinge 58 when the two lifting links 57 are in a vertical state.

[0076] The aforementioned insertion hole 32 and insertion post 511 cooperate to horizontally position the rotor positioning seat 3, ensuring that the mounting shaft 91, discharge hole 241 and pressure rod of the fan outer rotor 9 are coaxial during press fitting; the guide positioning block 53 and lifting guide rod 54 cooperate to prevent the lifting panel 51 from tilting during the up and down movement.

[0077] The two lifting linkages 57 and the lifting hinge 58 form a two-bar linkage. During operation, it is only necessary to lift the rotor positioning seat 3 and / or the support plate 4; the lifting distance does not need to be excessive. The design of the lifting positioning seat 55 limits the minimum height to which the lifting panel 51 descends. Furthermore, the extension and retraction of the two-bar linkage cannot be too long. If the lifting panel 51 descends too far, it requires ten times the normal cylinder force to lift it. Moreover, during press-fitting, the two lifting linkages 57 not only need to bear the weight of the lifting panel 51, the lifting guide rod 54, the support plate 4, the rotor positioning seat 3, and the outer rotor of the motor, but also the pressure applied by the positioning column. Therefore, it is necessary to… For the two lifting links 57 to have good support, if they are coaxial and straight, the force acting on them will not be dispersed horizontally, and they will not move horizontally, thus providing good support. However, if the two lifting links 57 are not straight and have an angle of less than 180°, when the positioning column applies pressure to the outer rotor of the motor, the lifting links 57 may be compressed, causing the lifting hinge 58 to move towards the lifting cylinder 52, resulting in the lifting panel 51 descending. This leads to poor support from the lifting links 57 and instability during the pressing process. A damper 552 can be installed at the upper end of the lifting positioning seat 55 to buffer the movement and prevent hard contact between the lifting panel 51 and the lifting positioning seat 55 during descent, thus avoiding damage or deformation / tilting of both.

[0078] The working principle of this bearing press-fitting equipment is as follows:

[0079] The rotor positioning seat 3, which holds the outer rotor 9 of the fan, moves along the production line to directly below the loading seat 2 under the drive of the pallet 4. The stopper on the production line is activated to stop the pallet 4 from moving forward. The lifting mechanism first lifts the pallet 4 or the rotor positioning seat 3, so that the pallet 4 is removed from the production line.

[0080] The seat drive 17 drives the loading seat 2 to move downward, so that the lower side of the loading seat 2 abuts against the upper edge of the outer rotor 9 of the fan.

[0081] Next, the feeding pusher plate 22 pushes the bearing 10 located in the feeding chute 24 to the right until the bearing 10 contacts the feeding baffle 23 and continues to move to the right until it is directly above the discharge hole 241.

[0082] Then the pressure rod drive 11 drives the feeding pressure rod 12 to move down. The lower end of the feeding pressure rod 12 contacts the bearing 10 fixed between the feeding pressure rod 12 and the feeding top rod and pushes the bearing 10 down. Under the push of the feeding pressure rod 12, the bearing 10 enters the discharge hole 241 and is sleeved on the mounting shaft 91 until it is pushed to the designated position by the feeding pressure rod 12.

[0083] The pressure rod drive component 11 drives the feeding pressure rod 12 to move upward and return to the initial position, and then the seat drive component 17 drives the feeding seat 2 to move upward and return to the initial position;

[0084] Finally, the lifting mechanism places the rotor positioning seat 3 on the pallet 4. The pallet 4 moves along the production line to the next station. Another pallet 4 carrying the fan outer rotor 9 to be assembled moves to the bottom of the loading seat 2 under the drive of the production line, and repeats the above pressing process.

[0085] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection defined by the claims of the present invention.

Claims

1. A bearing press-fitting device for an external rotor fan, comprising a rotor positioning seat (3), a feeding pressure rod (12), and a pressure rod drive member (11), wherein the feeding pressure rod (12) is disposed above the rotor positioning seat (3), and the pressure rod drive member (11) is capable of driving the feeding pressure rod (12) to move downward and press the bearing (10) into the mounting shaft (91) of the external rotor (9) of the fan inside the rotor positioning seat (3), wherein the lower end face of the feeding pressure rod (12) is provided with a receiving hole (121) for the mounting shaft (91) of the external rotor fan to be inserted, characterized in that: The system includes a feeding seat (2), a feeding pipe (21), a feeding push plate (22), and a feeding baffle (23). The feeding seat (2) is located between the feeding pressure rod (12) and the rotor positioning seat (3). The feeding seat (2) has a feeding groove (24) along its length. The bottom of the groove on the right side of the feeding groove (24) has a discharge hole (241). The discharge hole (241) is coaxially arranged with the rotor positioning seat (3) and the feeding pressure rod (12). The feeding pipe (21) has an inner hole (211) for storing the bearing (10). The feeding pipe (21) is fixedly connected to the feeding seat (2). The inner hole (211) is connected to the feeding chute (24). The feeding push plate (22) can push the bearing (10) from below the feeding pipe (21) to the right side of the feeding chute (24). The feeding baffle (23) can cooperate with the feeding push plate (22) to fix the bearing (10) above the discharge hole (241). An elastic positioning block (231) is fixedly connected to the right end of the feeding chute (24). An elastic element (232) is provided between the elastic positioning block (231) and the feeding baffle (23) to drive the feeding baffle (23) to move to the left. The initial position of the left end of the feeding baffle (23) is located at the left end of the discharge hole (241).

2. The bearing press-fitting equipment for an external rotor fan according to claim 1, characterized in that: The right end of the feeding pusher plate (22) is provided with an arc-shaped groove (222), which is in contact with the outer circumferential surface of the bearing (10).

3. The bearing press-fitting equipment for an external rotor fan according to claim 2, characterized in that: The feeding push plate (22) is fixedly connected to a limiting protrusion (221), and the feeding seat (2) is fixedly connected to a feeding limiting plate (25). The feeding limiting plate (25) is located on the left side of the feeding tube (21). The feeding limiting plate (25) is fixedly connected to a limiting rod (251) and a buffer (252). The left ends of the limiting rod (251) and the buffer (252) can abut against the limiting protrusion (221). The left end of the buffer (252) protrudes from the left end of the limiting rod (251). When the limiting protrusion (221) abuts against the limiting rod (251), the feeding push plate (22) pushes the bearing (10) to directly above the discharge hole (241).

4. The bearing press-fitting equipment for an external rotor fan according to claim 1, characterized in that: The inner hole (211) has at least three guide ribs (212) on its wall. The guide ribs (212) are spaced apart circumferentially along the wall of the hole, and the length direction of the guide ribs (212) is parallel to the axial direction of the inner hole (211).

5. The bearing press-fitting equipment for an external rotor fan according to claim 1, characterized in that: The feeding seat (2) is provided with positioning slots (26) on both sides. The lower end of the feeding tube (21) is formed with an outwardly protruding connecting part (213). The connecting part (213) is provided with a proximity switch (215) that can detect whether there is a bearing (10) in the feeding chute (24). The lower end of the connecting part (213) is provided with two downwardly protruding positioning blocks (214). The positioning blocks (214) can be inserted into the corresponding positioning slots (26). The connecting part (213) and the feeding seat (2) are fixedly connected by fasteners that penetrate the connecting part (213) vertically.

6. The bearing press-fitting equipment for an external rotor fan according to any one of claims 1-5, characterized in that: The upper side of the feeding seat (2) is fixed with a cover plate (27). The right end of the cover plate (27) is located to the right of the feeding hole (241). The cover plate (27) is provided with a through hole (271) coaxially arranged with the feeding hole (241). The diameter of the through hole (271) is larger than the diameter of the feeding pressure rod (12).

7. A bearing press-fitting device for an external rotor fan according to any one of claims 1-5, characterized in that: The pressure rod drive component (11) is fixedly connected to the drive component fixing plate (1). The upper part of the feeding pressure rod (12) is fixedly connected to a horizontally arranged bearing pressure plate (13). At least three drive guide rods (14) are fixed on the drive component fixing plate (1). The pressure rod drive component (11) can drive the bearing pressure plate (13) to move up and down along the drive guide rods (14).

8. The bearing press-fitting equipment for an external rotor fan according to claim 7, characterized in that: The upper part of the feeding pressure rod (12) is fixedly connected to the bearing pressure plate (13). A conical groove (131) is provided on the middle part of the upper side of the bearing pressure plate (13) or on the upper end surface of the feeding pressure rod (12). A spherical part (122) is installed in the conical groove (131). A connecting plate (15) is fixedly connected to the upper side of the bearing pressure plate (13). A vertical strip hole (151) is provided on the upper part of the connecting plate (15). The driving rod (111) of the pressure rod driving member (11) and the connecting plate (15) are vertically movable through the strip hole (151). When the driving rod (111) moves down, it can abut against the upper end of the feeding pressure rod (12). When the driving rod (111) moves up, it can separate from the feeding pressure rod (12).

9. The bearing press-fitting equipment for an external rotor fan according to claim 7, characterized in that: The loading seat (2) is provided with at least three seat guide holes (28). The seat guide holes (28) are located at the left end and the right end of the loading seat (2). The drive component fixing plate (1) is provided with a seat guide rod (16) that cooperates with the seat guide hole (28). The seat guide rod (16) can be inserted into the seat guide hole (28). The drive component fixing plate (1) is fixed with a seat drive component (17). The seat drive component (17) is connected to the loading seat (2) and drives the loading seat (2) to move up and down.

10. A bearing press-fitting device for an external rotor fan according to any one of claims 1-5, characterized in that: The rotor positioning seat (3) is mounted on the support plate (4). The support plate (4) has a mounting hole (41). The upper end of the mounting hole (41) has a circular step (42). A circular protrusion (31) is fixed on the outer side wall of the rotor positioning seat (3). The circular protrusion (31) can be placed on the circular step (42). The lower end of the rotor positioning seat (3) protrudes from the lower side of the support plate (4). A lifting positioning mechanism (5) is provided below the rotor positioning seat (3) to drive the rotor positioning seat (3) to detach from the support plate (4) and maintain a horizontal state.

11. The bearing press-fitting equipment for an external rotor fan according to claim 10, characterized in that: The lifting and positioning mechanism (5) includes a lifting panel (51), a lifting cylinder (52), a guide positioning block (53), at least three lifting guide rods (54), a lifting hinge (58), two lifting connecting rods (57), and a lifting positioning seat (55). The rotor positioning seat (3) has at least three insertion holes (32) spaced apart along the circumference. The lifting panel (51) is horizontally positioned and located directly below the loading seat (2). An insertion post (511) that engages with the insertion hole (32) is fixedly connected to the upper side of the lifting panel (51). The lifting cylinder (52) is located below the lifting panel (51) and drives the lifting panel (51) to move up and down. The guide positioning block (53) is fixedly connected to the base (56). The upper end of the lifting guide rod (54) is fixedly connected to the lifting panel (51), and the lower end is inserted into the guide positioning block. The block (53) can move up and down relative to the guide positioning block (53); the upper end of one of the lifting connecting rods (57) is hinged to the lifting panel (51), the lower end of the other lifting connecting rod (57) is hinged to the base (56), and the other ends of both lifting connecting rods (57) are hinged to the lifting hinge (58). The lifting cylinder (52) is horizontally mounted on the base (56), and the drive rod of the lifting cylinder (52) is connected to the lifting hinge. (58) Connect and drive the lifting hinge (58) to move laterally. The lifting positioning seat (55) is fixed on the base (56). The upper end of the lifting positioning seat (55) can abut against the lower side of the lifting panel (51). The side of the lifting positioning seat (55) is provided with a lateral limiting rod (551). The lateral limiting rod (551) can abut against the lifting hinge (58) when the two lifting connecting rods (57) are in a straight line.

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