Lightweight magnesium alloy battery shell hot riveting processing equipment

Abstract

The application relates to the technical field of battery shell hot riveting processing, and particularly discloses a magnesium alloy battery lightweight shell hot riveting processing device, which comprises a cooling mechanism, the cooling mechanism comprises a positioning cylinder, an elastic element, a ventilation assembly and a refrigeration assembly, the positioning cylinder is slidably arranged outside a lifting rod and a hot riveting head in the up-down direction, the elastic element connects the positioning cylinder and the lifting rod and applies a downward elastic force to the positioning cylinder, the positioning cylinder is pressed on a protection plate soft plate to position the protection plate soft plate when the lifting rod moves downward, and the positioning cylinder lags behind the lifting rod when the lifting rod moves upward under the action of the elastic element; the magnesium alloy battery lightweight shell hot riveting processing device can cooperate the cold air generated by the refrigeration assembly with the air blown by the ventilation assembly to cool the hot riveting head and a plastic rivet, the time length for stopping cooling of the hot riveting head is shortened, and the processing efficiency of the magnesium alloy battery lightweight shell is improved.

Description

Technical Field

[0001] This invention relates to the field of hot riveting technology for battery casings, specifically to a hot riveting equipment for lightweight magnesium alloy battery casings. Background Technology

[0002] The lightweight magnesium alloy battery casing is a high-performance battery protection carrier built using the superior properties of magnesium alloy. With a density only about two-thirds that of aluminum alloy and about one-quarter that of steel, magnesium alloy allows the casing to achieve extreme weight reduction while maintaining high strength and rigidity, perfectly balancing the core requirements of "lightness" and "strength"—it provides a robust and reliable protective barrier for the battery, resisting external impacts, vibrations, and compression, while significantly reducing the load on the vehicle or equipment, contributing to increased range and reduced energy consumption. The flexible protective board is a flexible extension of the magnesium alloy battery protection board, suitable for wearable flexible magnesium alloy battery applications. Its core material is an FPC (Flexible Printed Circuit Board) substrate, and it also integrates electronic components. During the processing of the lightweight magnesium alloy battery casing, a hot riveting process is used to fix the flexible protective board onto the casing to facilitate the subsequent installation of integrated electronic components.

[0003] Chinese patent document CN222712886U discloses a lithium battery casing hot riveting device, including a casing conveying mechanism, a flexible plate pressure holding mechanism, and a hot riveting mechanism. The flexible plate pressure holding mechanism and the hot riveting mechanism are arranged sequentially along the conveying direction of the casing conveying mechanism. The casing, together with the assembled battery cell, is fed from the previous station onto the casing conveying mechanism. The casing conveying mechanism first moves the casing to the flexible plate pressure holding mechanism for pressure holding of the protective plate, and then moves the casing to the hot riveting mechanism. The hot riveting head on the hot riveting mechanism performs hot pressing on the casing rivets to fix the protective plate onto the casing.

[0004] However, the aforementioned patent documents still have the following shortcomings: During the mass production of lightweight magnesium alloy battery casings, to prevent the hot riveting head from aging or being damaged due to excessive temperature accumulation caused by continuous operation, the hot riveting mechanism needs to be stopped and cooled down after each hot riveting operation to maintain the temperature of the hot riveting head within the stable range allowed by the process, avoiding overheating or large temperature fluctuations. However, due to the long-term operation of the hot riveting mechanism, the ambient temperature is relatively high, which reduces the cooling efficiency of the hot riveting head, prolongs the downtime for cooling, and thus reduces the overall processing efficiency of the lightweight magnesium alloy battery casing. Summary of the Invention

[0005] This invention provides a hot riveting processing device for lightweight magnesium alloy battery casings, aiming to solve the problem in related technologies where the ambient temperature around the hot riveting mechanism is high due to long-term operation, thereby reducing the cooling rate of the hot riveting head and prolonging the downtime for cooling the hot riveting head.

[0006] The present invention relates to a lightweight magnesium alloy battery casing hot riveting equipment for riveting a protective plate to the casing using plastic rivets. The equipment includes a mounting frame and a casing clamping mechanism and a hot riveting mechanism mounted on the mounting frame. The casing clamping mechanism is located below the hot riveting mechanism. The hot riveting mechanism includes a lifting rod capable of vertical movement and a hot riveting head connected to the bottom of the lifting rod. It also includes a cooling mechanism, which comprises a positioning cylinder, an elastic element, a venting component, and a cooling component. The positioning cylinder is slidably sleeved on the outside of the lifting rod and the hot riveting head in the vertical direction. The elastic element connects the positioning cylinder and the lifting rod and applies a downward elastic force to the positioning cylinder. When the positioning cylinder moves downward with the lifting rod, it presses against the protective plate to position it. When the lifting rod moves upward, the positioning cylinder lags behind the lifting rod's upward movement under the action of the elastic element. Both the ventilation and cooling components are mounted on the positioning cylinder. The cooling component produces cold air, while the ventilation component blows air to the bottom of the hot riveting head and works in conjunction with the cold air to cool it down.

[0007] Beneficial effects: During use, the outer shell is clamped and fixed by the outer shell clamping mechanism, and the protective plate is fitted onto the plastic rivet on the outer shell. The hot riveting mechanism moves downward, and the lifting rod drives the hot riveting head and positioning cylinder to move downward. After the positioning cylinder contacts the protective plate, it stops moving downward due to the obstruction of the protective plate. At this time, the lifting rod continues to drive the hot riveting head downward, which can compress the elastic element, so that the positioning cylinder presses against the protective plate, ensuring that the protective plate does not shake during the hot riveting process. After the hot riveting head contacts the plastic rivet, it stops moving and performs hot riveting on the plastic rivet. After the plastic rivet is hot riveted, the lifting rod drives the hot riveting head to move upward. At this time, the positioning cylinder maintains pressure on the protective plate under the action of the elastic element, preventing the protective plate from deforming due to the loss of pressure from the positioning cylinder before the top of the plastic rivet has cooled and solidified, thus preventing the protective plate from detaching from the plastic rivet. When the ventilation and cooling components are activated, the air blown by the ventilation component can work with the cold air produced by the cooling component to cool the hot riveting head. The cold air and the blown air converge in the positioning cylinder and are concentrated on the hot riveting head, which improves the processing efficiency of the lightweight magnesium alloy battery casing.

[0008] Preferably, the positioning cylinder includes a cylinder body sleeved on the outside of the connecting rod and the hot riveting head, and a blocking part disposed inside the cylinder body. The hot riveting head is located below the blocking part, and the lifting rod passes through the blocking part. The hot riveting head moves upward and drives the cylinder body to move upward by pushing the blocking part upward.

[0009] Preferably, the cooling mechanism further includes a piston that is slidably mounted in the cylinder in the vertical direction. The piston is fixedly connected to the lifting rod, and a chamber is formed between the top of the piston and the inner wall of the cylinder. The ventilation component communicates with the chamber, and when the piston moves upward, it pushes the air in the chamber and blows it to the hot riveting head by the ventilation component.

[0010] Its effect is as follows: when the lifting rod moves the hot riveting head downward, it also moves the piston downward. At this time, the internal volume of the chamber gradually increases, so that the ventilation component draws air into the chamber. After the hot riveting is completed, when the lifting rod moves the hot riveting head upward, it also moves the piston upward. At this time, the internal volume of the chamber gradually decreases, so that the air in the chamber is blown out by the ventilation component to the hot riveting head, so as to cool the hot riveting head. No additional special air source is required, saving costs.

[0011] Preferably, the lower inner wall of the cylinder has an installation port that connects the inside and outside. The ventilation component includes a ventilation pipe and an air blowing head. The ventilation pipe is connected to the cylinder and communicates with the chamber. The air blowing head is connected to the ventilation pipe and installed in the installation port.

[0012] Its effect is that as the internal volume of the chamber gradually decreases, the air inside the chamber can pass through the vent pipe and the air blowing head in sequence, and the air blowing head blows the air towards the hot riveting head. After the bottom of the cylinder contacts the top of the protective plate, the installation port ensures that the inner cavity of the cylinder located at the bottom of the piston is not sealed, thus ensuring the stability of the lifting rod, the hot riveting head, and the piston when they move downwards.

[0013] Preferably, the vent pipe includes a flexible hose portion, and the blowing head is rotatably mounted on the inner wall of the mounting port about a horizontally extending axis. The blowing head has an inner end facing the center of the cylinder and an outer end connected to the vent pipe. When the blowing head rotates, it has a blowing state in which the inner end is higher than the outer end and the inner end is located in the cylinder, and also a clearance state in which the inner end is lower than the outer end and the inner end is located in the mounting port. The ventilation assembly also includes a reset component, which is used to drive the air blowing head to rotate to the air blowing state; when the positioning cylinder presses against the protective plate and the hot riveting head continues to move downward, it pushes the inner end of the air blowing head and drives the air blowing head to rotate to the avoidance state.

[0014] Its effect is as follows: through the coordinated arrangement of the connector, rotating shaft, and reset component, the air blowing head can be in a blowing state with its inner end higher than its outer end and located in the cylinder when rotating, and also in a clearance state with its inner end lower than its outer end and located in the mounting port. When the hot riveting head moves down, it can push the air blowing head and connector to flip and twist the reset component, so that the air blowing head is in the clearance state and can avoid the hot riveting head. When the hot riveting head moves up, the air blowing head can be driven by the reset component to flip and reset, so that the air blowing head gradually switches from the clearance state to the blowing state. After the air blowing head is in the blowing state, when the air blowing head continues to reset, the port of the air blowing head near the hot riveting head can always face the bottom of the hot riveting head, so that the air discharged by the air blowing head can directly blow the bottom of the hot riveting head, thereby enhancing the cooling effect on the hot riveting head and reducing the impact force of the air, so as to cool down the plastic rivet after hot riveting and avoid deformation of the plastic rivet after hot riveting due to the large impact force of the discharged air.

[0015] Preferably, the inner wall of the cylinder is provided with a vent that connects the inside and outside of the cylinder, and the vent is located above the blocking part; the vent is used to communicate with the chamber when the piston moves downward to the end stroke.

[0016] The effect is as follows: after the hot riveting head and piston move down and push the air blowing head to the avoidance state, the vent is connected to the chamber. After the hot riveting head finishes riveting the plastic rivet, the drive source drives the lifting rod to move up, and the lifting rod drives the hot riveting head and piston to move up. At this time, because the chamber is connected to the vent, the air in the chamber will not be completely discharged out through the air blowing head, so as to avoid the air discharged by the air blowing head having too great an impact force and affecting the molding of the plastic rivet. When the hot riveting head moves up, the reset component drives the air blowing head to gradually rotate counterclockwise to reset. After the air blowing head rotates to the blowing state, the piston moves above the vent, so that the chamber is no longer connected to the vent. At this time, as the internal volume of the chamber decreases, all the air in the chamber is blown to the bottom of the hot riveting head through the air pipe, the hose part and the air blowing head, so as to enhance the cooling effect on the hot riveting head and the plastic rivet.

[0017] Preferably, the positioning cylinder further includes a fixing member for securing the ventilation assembly to the outside of the cylinder body.

[0018] Preferably, the refrigeration assembly includes a refrigeration box and a refrigeration plate. The refrigeration box is connected to the outside of the cylinder, and the refrigeration plate is connected to the inside of the refrigeration box. The refrigeration plate is used to generate cold air inside the refrigeration box. The positioning cylinder has an opening that connects the refrigeration box and the inside of the positioning cylinder so that the cold air can escape into the positioning cylinder.

[0019] Its effect is that the cooling element can cool the inside of the cooling box to form cold air. The cold air can then dissipate into the cylinder and, together with the air blown out by the ventilation component, cool the hot riveting head and the hot-riveted plastic rivets.

[0020] Preferably, the opening includes an opening one and an opening two located above the opening one.

[0021] Its effect is that the cold air inside the cooling box can be dissipated into the cylinder through opening one and opening two, and when the hot riveting head passes through opening one and opening two, the cold air can be directly dissipated onto the hot riveting head, thus accelerating the cooling speed of the hot riveting head.

[0022] Preferably, the refrigeration assembly further includes a linear actuator fixed on the refrigeration box and a sealing part, the sealing part being fixedly connected to the vertical telescopic end of the linear actuator, and the sealing part being used to seal opening one or opening two.

[0023] Its effect is as follows: when the hot riveting head moves up, the sealing part blocks the second opening, and the first opening is in the open state, so that the cold air in the cooling box can escape into the cylinder from the first opening. At this time, the air blown out by the air blower can cool down the hot riveting head and the plastic rivet after hot riveting. Moreover, the distance between the first opening and the plastic rivet is smaller than the distance between the second opening and the plastic rivet, so that the cold air can be concentrated at the plastic rivet, thereby accelerating the cooling speed of the plastic rivet, so that the top of the plastic rivet can be quickly solidified and formed.

[0024] After the hot riveting head moves up to above the second opening, the sealing part seals the opening, leaving the second opening open. Since the distance between the first opening and the hot riveting head is greater than the distance between the second opening and the hot riveting head, the cold air is concentrated at the hot riveting head, thereby accelerating the cooling speed of the hot riveting head. By alternately sealing the first and second openings, the cold air generated inside the cooling box can be fully utilized.

[0025] The beneficial effects of this invention are: 1. The air blown by the ventilation component can work with the cold air produced by the cooling component to cool the hot riveting head, improving the processing efficiency of the lightweight magnesium alloy battery casing. The cold air is also blown towards the plastic rivet under the guidance of the cylinder to accelerate the curing speed of the plastic rivet and avoid deformation or collapse due to slow natural cooling. This ensures that the mushroom head rivet has a regular shape and a firm connection. At the same time, because the blown air collides with the hot riveting head and the cylinder first, it can buffer the blown air to avoid the impact force of the air being too large and causing the shape of the plastic rivet tip to change after curing.

[0026] 2. The drive source drives the lifting rod to move down and approach the protective plate. When the lifting rod moves down, it drives the hot riveting head and the cooling mechanism to move down as well. After the bottom of the cylinder contacts the protective plate, the cylinder stops moving down due to the obstruction of the protective plate. The lifting rod continues to move down and drives the hot riveting head and the piston to move down. At the same time, the elastic element is compressed, so that the cylinder squeezes and fixes the protective plate. When the lifting rod moves up and the ventilation component works with the cooling component to cool the hot riveting head and the rivet, the compression and fixation of the protective plate is maintained to prevent the protective plate from resetting after the force is lost and affecting the curing and molding of the rivet.

[0027] 3. After the rivets are hot-riveted, when the hot riveting head moves up, the sealing part seals the second opening, and the first opening is in the open state. After the hot riveting head moves above the second opening, the sealing part seals the second opening, and the second opening is in the open state. By alternately sealing the first and second openings, the cold air generated in the cooling box can be fully utilized. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0029] Figure 2 This is a front view schematic diagram of the hot riveting mechanism and the cooling mechanism of the present invention.

[0030] Figure 3 This is a front view cross-sectional structural schematic diagram of the hot riveting mechanism and the cooling mechanism of the present invention.

[0031] Figure 4 This is a front cross-sectional view of the hot riveting head and cooling mechanism of the present invention.

[0032] Figure 5 This is the invention Figure 4 A magnified structural diagram of point A in the middle.

[0033] Figure 6 This is a three-dimensional structural diagram of the sealing part of the present invention.

[0034] Figure label: 1. Mounting bracket; 2. Support platform; 3. Housing clamping mechanism; 4. Hot riveting mechanism; 41. Drive source; 42. Lifting rod; 43. Hot riveting head; 44. Groove; 5. Cooling mechanism; 51. Positioning cylinder; 511. Cylinder body; 512. Blocking part; 513. Fixing part; 514. Mounting port; 515. Opening one; 516. Opening two; 517. Vent; 52. Elastic element; 53. Venting assembly; 531. Venting pipe; 532. Hose part; 533. Air blowing head; 534. Connecting part; 535. Rotating shaft; 536. Reset part; 54. Cooling assembly; 541. Cooling box; 542. Cooling element; 543. Linear actuator; 544. Sealing part; 55. Piston; 56. Chamber. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] like Figures 1 to 6As shown, the magnesium alloy battery lightweight casing hot riveting equipment of the present invention includes a mounting frame 1, a support platform 2, a casing clamping mechanism 3, a hot riveting mechanism 4, and a cooling mechanism 5. The support platform 2 is fixedly connected to the mounting frame 1, providing support for the casing. The casing clamping mechanism 3 is mounted on the support platform 2, clamping and fixing the casing to ensure stability when the protective plate is fixed to the casing. The casing clamping mechanism 3 is a commonly used clamp in existing battery casing hot riveting technology, and will not be described in detail here. The hot riveting mechanism 4 is mounted on the mounting frame 1. After the protective plate is positioned onto the casing using plastic rivets, the hot riveting mechanism 4 performs hot riveting on the plastic rivets, causing them to melt and cool and solidify, thus fixing the protective plate onto the casing. The cooling mechanism 5 is installed on the hot riveting mechanism 4. When the hot riveting mechanism 4 is close to the protective flexible plate, the cooling mechanism 5 can press against the protective flexible plate. After the hot riveting mechanism 4 has finished hot riveting the rivets and is away from the protective flexible plate, the cooling mechanism 5 can cool the hot riveting mechanism 4, accelerate the cooling speed of the hot riveting mechanism 4, shorten the time when the hot riveting mechanism stops cooling, and improve the processing efficiency of the lightweight magnesium alloy battery casing. The cooling mechanism 5 can also cool the hot riveted plastic rivets so that the molten plastic rivets can be quickly solidified and shaped, avoiding deformation or collapse due to slow natural cooling, and ensuring that the mushroom head rivets formed are regular in shape and firmly connected.

[0037] When fixing the protective flexible plate to the outer shell, the outer shell is first placed on the support platform 2. The support platform 2 supports the outer shell, ensuring that the outer shell is positioned below the hot riveting mechanism 4. Then, the outer shell clamping mechanism 3 is driven to clamp and fix the outer shell on the support platform 2 to ensure stability during hot riveting. The protective flexible plate is then positioned on the outer shell using plastic rivets.

[0038] The hot riveting mechanism 4 is activated, which drives the cooling mechanism 5 to move down and get closer to the protective plate. After the cooling mechanism 5 comes into contact with the protective plate, it is squeezed and positioned. At the same time, the cooling mechanism 5 stops moving after being blocked by the protective plate, while the hot riveting mechanism 4 continues to move towards the protective plate until it comes into contact with the plastic rivet.

[0039] The hot riveting mechanism 4 is activated to heat the plastic rivet, causing it to melt. After the plastic rivet is hot riveted, the hot riveting mechanism 4 is moved upwards and away from the protective flexible plate. During this process, the cooling mechanism 5 cools the hot riveting mechanism 4 to accelerate the cooling speed and simultaneously cool the melted plastic rivet, so that the molten plastic rivet can be quickly solidified and shaped, avoiding deformation or collapse due to slow natural cooling, and ensuring that the mushroom head rivet has a regular shape and a firm connection.

[0040] like Figures 1 to 4 As shown, the hot riveting mechanism 4 includes a drive source 41, a lifting rod 42, and a hot riveting head 43. The drive source 41 is fixedly connected to the mounting bracket 1. The drive source 41 is a cylinder with its telescopic end facing downwards. The lifting rod 42 is connected to the telescopic end of the drive source 41 and is coaxially arranged with the telescopic end. The drive source 41 can drive the lifting rod 42 to move up and down. The cooling mechanism 5 is installed on the lifting rod 42 and can move up and down with the lifting rod 42. The hot riveting head 43 is fixedly connected to the bottom end of the lifting rod 42. The hot riveting head 43 can heat the plastic rivet to melt it. The bottom of the hot riveting head 43 is provided with a groove 44. Through the groove 44 at the bottom of the hot riveting head 43, the top of the plastic rivet can be shaped so that the top of the cured plastic rivet forms a mushroom head.

[0041] When performing hot riveting on plastic rivets, the drive source 41 is activated, which drives the lifting rod 42 to move down and approach the protective plate. When the lifting rod 42 moves down, it drives the hot riveting head 43 and the cooling mechanism 5 to move down. The cooling mechanism 5 first contacts the protective plate and then stops moving, thereby squeezing and positioning the protective plate. The lifting rod 42 continues to drive the hot riveting head 43 to move down until the hot riveting head 43 contacts the top of the plastic rivet. Then, the hot riveting head 43 is activated to heat the plastic rivet so that it melts.

[0042] After the plastic rivets are hot-riveted, the drive source 41 is activated, which drives the lifting rod 42 to move upward and away from the protective plate. When the lifting rod 42 moves upward, it first drives the hot riveting head 43 to move upward and away from the plastic rivets. At this time, the cooling mechanism 5 is still in the state of squeezing and positioning the protective plate. During the upward movement of the hot riveting head 43, the cooling mechanism 5 is activated to cool the hot riveting head 43 to accelerate the cooling speed of the hot riveting head 43. At the same time, the plastic rivets after hot riveting are cooled to allow them to solidify quickly. When the lifting rod 42 drives the cooling mechanism 5 to move upward, the cooling mechanism 5 is turned off to complete the cooling of the hot riveting head 43 and the plastic rivets. At this time, the plastic rivets have been solidified, preventing the movement of the protective plate from affecting the forming of the top of the plastic rivets.

[0043] like Figures 1 to 6As shown, the cooling mechanism 5 includes a positioning cylinder 51, an elastic element 52, a venting assembly 53, a cooling assembly 54, and a piston 55. The positioning cylinder 51 is sleeved on the lifting rod 42, and the hot riveting head 43 is located inside the positioning cylinder 51. The elastic element 52 is a spring, sleeved on the outside of the lifting rod 42, with its top end connected to the lifting rod 42 and its bottom end connected to the positioning cylinder 51. The venting assembly 53 is installed on the positioning cylinder 51 and can blow air onto the hot riveting head 43 to cool it. The air can also be blown from the bottom of the positioning cylinder 51 onto the hot-riveted plastic rivet to accelerate its curing. The cooling assembly 54 is installed on the positioning cylinder 51 and can reduce the temperature inside the positioning cylinder 51, working in conjunction with the venting assembly 53 to cool the hot riveting head 43 and the plastic rivet. The piston 55 is fixedly connected to the lifting rod 42. The piston 55 is inserted into the positioning cylinder 51 and is located above the hot riveting head 43. A chamber 56 is formed between the top of the piston 55 and the inner wall of the positioning cylinder 51. The ventilation assembly 53 communicates with the chamber 56.

[0044] After the positioning cylinder 51 contacts the protective plate and stops moving, it ensures that the protective plate will not shake during the hot riveting process. The lifting rod 42 continues to move downward, which can drive the hot riveting head 43 and the piston 55 to move downward and compress the elastic element 52. When the piston 55 moves downward, the volume of the chamber 56 formed between the piston 55 and the positioning cylinder 51 increases, so that the ventilation assembly 53 draws in outside air into the chamber 56.

[0045] When the lifting rod 42 moves the hot riveting head 43 upward, the bottom of the positioning cylinder 51 is still pressed and fixed against the protective plate under the action of the elastic element 52. This prevents the protective plate from deforming due to the loss of pressure from the positioning cylinder 51 before the top of the plastic rivet has cooled and solidified, thus preventing the protective plate from detaching from the plastic rivet. The lifting rod 42 moves the piston 55 upward, reducing the volume of the chamber 56. This allows the air in the chamber 56 to be blown from the ventilation component 53 to the hot riveting head 43, and is cooled by the cooling component 54. When the air is discharged from the bottom of the positioning cylinder 51, it can cool the plastic rivet after hot riveting. Since the air blown out by the ventilation component 53 can directly blow onto the hot riveting head 43, the hot riveting head 43 can buffer the air, preventing the air blown out by the ventilation component 53 from blowing directly onto the top of the plastic rivet, thus avoiding excessive air impact that could cause the shape of the solidified top of the plastic rivet to change.

[0046] Continue to refer to Figures 1 to 6As shown, the positioning cylinder 51 includes a cylinder body 511, a blocking part 512, and a fixing member 513. A circular hole with the same diameter as the lifting rod 42 is provided at the top of the cylinder body 511, allowing the bottom end of the lifting rod 42 to extend into the cylinder body 511 through the hole. The bottom end of the elastic member 52 is fixedly connected to the cylinder body 511. A hot riveting head 43 is located inside the cylinder body 511, and the bottom of the cylinder body 511 is hollow, allowing the hot riveting head 43 to perform hot riveting operations on plastic rivets. A piston 55 is inserted into the cylinder body 511, with the outer side of the piston 55 contacting the inner wall of the cylinder body 511. A chamber 56 is formed by the top of the piston 55 and the inner wall of the cylinder body 511. An installation port 514 is provided at the lower outer side of the cylinder 511. The ventilation assembly 53 can be installed through the installation port 514. After the bottom of the cylinder 511 contacts the top of the protective plate, the installation port 514 ensures that the inner cavity of the cylinder 511 located at the bottom of the piston 55 is not sealed, so as to ensure the stability of the lifting rod 42, the hot riveting head 43 and the piston 55 when they move down.

[0047] Continue to refer to Figures 1 to 6 As shown, the blocking part 512 is fixedly connected inside the cylinder 511, and is located between the hot riveting head 43 and the piston 55. The lifting rod 42 passes through the blocking part 512. When the lifting rod 42 drives the hot riveting head 43 to move upward, after the compressed elastic element 52 has fully returned to its original position, the hot riveting head 43 can push the blocking part 512 upward, so that the blocking part 512 drives the cylinder 511 upward. The fixing member 513 is fixedly connected to the cylinder 511, and the venting assembly 53 can be limited and fixed by the fixing member 513.

[0048] Continue to refer to Figures 1 to 6As shown, the ventilation assembly 53 includes a ventilation pipe 531, a flexible hose portion 532, an air blowing head 533, a connector 534, a rotating shaft 535, and a resetting member 536. The top end of the ventilation pipe 531 is fixedly connected to the top of the cylinder 511, and the ventilation pipe 531 communicates with the chamber 56. The connector 534 is rotatably connected to the mounting port 514 via the rotating shaft 535. The two ends of the resetting member 536 are fixedly connected to the inner wall of the mounting port 514 and the connector 534, respectively. The resetting member 536 is a torsion spring used to drive the connector 534 to reset. The air blowing head 533 is fixedly connected to the connector 534. The air blowing head 533 has an inner end facing the center of the cylinder 511 and an outer end connected to the air pipe 531. When rotating, the air blowing head 533 has a blowing state where the inner end is higher than the outer end and the inner end is located in the cylinder 511, and also a clearance state where the inner end is lower than the outer end and the inner end is located in the mounting port 514. The reset member 536 can switch the air blowing head 533 between the blowing state and the clearance state. When the reset member 536 is in a stress-free state, the inner end of the air blowing head 533 fixedly connected to the connector 534 is higher than the outer end to prevent the air blowing head 533 from directly blowing air onto the hot-riveted plastic rivet. When the hot riveting head 43 moves down and pushes the air blowing head 533 to rotate, the air blowing head 533 can twist the reset member 536 and clearance the hot riveting head 43, so that the air blowing head 533 is in the clearance state. When the hot riveting head 43 moves upward after melting the plastic rivet, the reset member 536 can drive the air blowing head 533 to gradually switch from the avoidance state to the blowing state. The lower end of the air pipe 531 is set as a flexible hose 532, which is fixedly connected to the air blowing head 533.

[0049] After the bottom end of the cylinder 511 contacts the top of the protective plate and stops moving, the lifting rod 42 continues to drive the hot riveting head 43 and the piston 55 to move down. The hot riveting head 43 can push the air blowing head 533 to flip, so that the air blowing head 533 drives the connecting piece 534 and the rotating shaft 535 to rotate, and twists the reset piece 536 until the hot riveting head 43 contacts the top of the plastic rivet. During this process, the volume of the chamber 56 increases, and air can be delivered into the chamber 56 through the air blowing head 533, the hose part 532 and the air pipe 531. A vent 517 is provided on the outer side of the cylinder 511, located above the blocking part 512. After the hot riveting head 43 and piston 55 move down and push the air blowing head 533 to a horizontal position, the vent 517 communicates with the chamber 56. At this time, some of the air drawn in when the internal volume of the chamber 56 increases enters the chamber 56 through the vent 517, and is no longer entirely drawn in by the air blowing head 533. After the hot riveting head 43 moves down to the top of the plastic rivet, the hot riveting head 43 stops moving, and the air blowing head 533 is in a avoidance state. After the hot riveting head 43 completes the hot riveting of the plastic rivet, the drive source 41 drives the lifting rod 42 to move upward, and the lifting rod 42 drives the hot riveting head 43 and the piston 55 to move upward. At this time, because the chamber 56 is connected to the vent 517, the air in the chamber 56 will not be completely discharged outward by the air blowing head 533, so as to avoid the air discharged by the air blowing head 533 having too great an impact force and affecting the molding of the top of the plastic rivet. When the hot riveting head 43 moves upward, the reset member 536 drives the air blowing head 533 to gradually rotate counterclockwise to reset. When the air blowing head 533 rotates to the blowing state, the piston 55 moves above the vent 517 so that the chamber 56 is no longer connected to the vent 517. At this time, as the internal volume of the chamber 56 decreases, all the air in the chamber 56 is blown to the bottom of the hot riveting head 43 through the vent pipe 531, the hose part 532 and the air blowing head 533.

[0050] After the plastic rivets are hot-riveted, when the lifting rod 42 moves the hot riveting head 43 and piston 55 upward, the internal volume of the chamber 56 decreases, allowing the air inside the chamber 56 to be blown out through the vent 517, vent pipe 531, hose section 532, and air blowing head 533. As the hot riveting head 43 moves upward, the air blowing head 533 gradually flips and resets under the action of the reset member 536. After the air blowing head 533 flips to the blowing state, the vent 517 connects with the chamber 56. At this time, as the piston 55 moves upward, the air inside the chamber 56 passes through the vent pipe 531... The hose portion 532 and the air blowing head 533 blow air towards the hot riveting head 43. As the air blowing head 533 continues to reset, the right end of the air blowing head 533 can always face the bottom of the hot riveting head 43, so that the air discharged from the air blowing head 533 can directly blow the bottom of the hot riveting head 43, thereby enhancing the cooling effect on the hot riveting head 43 and reducing the impact force of the air, so as to cool down the plastic rivet after hot riveting and avoid deformation of the top of the plastic rivet after hot riveting due to the large impact force of the discharged air. Moreover, no additional special air source is required, saving costs.

[0051] Continue to refer to Figures 1 to 6 As shown, the refrigeration assembly 54 includes a refrigeration box 541, a refrigeration element 542, a linear actuator 543, and a sealing part 544. The refrigeration box 541 is connected to the outside of the cylinder 511. The refrigeration element 542 is connected inside the refrigeration box 541 and can cool the air inside the refrigeration box 541 to form cold air. An opening is provided on the inner wall of the cylinder 511, which communicates with the inside of the refrigeration box 541 so that the cold air inside the refrigeration box 541 can dissipate into the cylinder 511 and, together with the air blown out by the air blown out by the air blown out by the air blown out by the air blown out by the air blown out by the air blown out by the air blown out by the air blown out by the air blown out by the air blown out by the air blown out by the air blown out by the air blown out by the air blown out by the air blown out by the air blown out of ... The linear actuator 543 is fixedly connected to the top of the refrigeration box 541. The linear actuator 543 is an electric telescopic rod with its telescopic end facing downwards, and the telescopic end of the linear actuator 543 extends into the refrigeration box 541. The sealing part 544 is connected to the telescopic end of the linear actuator 543, and the sealing part 544 can seal either opening one 515 or opening two 516.

[0052] After the hot riveting head 43 moves up to above the opening 515, the linear actuator 543 is activated to drive the sealing part 544 to seal the second opening 516, so that the cold air in the cooling box 541 can dissipate from the opening 515 into the cylinder 511. At this time, the air blown out by the air blowing head 533 can cool the hot riveting head 43 and the plastic rivet after hot riveting. Moreover, the distance between the first opening 515 and the plastic rivet is smaller than the distance between the second opening 516 and the plastic rivet, so that the cold air can be concentrated at the plastic rivet, thereby accelerating the cooling speed of the plastic rivet so that the plastic rivet can be quickly cured and formed.

[0053] After the hot riveting head 43 moves up to above the second opening 516, the linear actuator 543 is activated to drive the sealing part 544 down and seal the first opening 515, so that the cold air in the cooling box 541 can escape into the cylinder 511 from the second opening 516. At this time, the air blown out by the air blowing head 533 can cool the hot riveting head 43 and the plastic rivet after hot riveting. Since the distance between the first opening 515 and the hot riveting head 43 is greater than the distance between the second opening 516 and the hot riveting head 43, the cold air is concentrated at the hot riveting head 43, thereby accelerating the cooling speed of the hot riveting head 43.

[0054] It can be seen that by alternately sealing opening 1 515 and opening 2 516, the cold air generated inside the refrigeration box 541 can be fully utilized.

[0055] Working principle: When fixing the protective plate to the outer shell, the outer shell is first placed on the support platform 2. The support platform 2 supports the outer shell so that the outer shell is located below the hot riveting mechanism 4. Then, the outer shell clamping mechanism 3 is driven to clamp and fix the outer shell on the support platform 2 to ensure stability during hot riveting. Then, the protective plate is positioned by plastic rivets.

[0056] The drive source 41 is activated, causing the lifting rod 42 to move downwards and approach the protective plate. As the lifting rod 42 moves downwards, it also moves the hot riveting head 43 and the cooling mechanism 5 downwards. After the bottom of the cylinder 511 contacts the protective plate, the cylinder 511 stops moving downwards due to the blockage of the protective plate. At this point, the cylinder 511 presses and fixes the protective plate, while the lifting rod 42 continues to move downwards, driving the hot riveting head 43 and the piston 55 downwards, simultaneously compressing the elastic element 52. As the piston 55 moves downwards, the volume inside the chamber 56 increases. Air is then drawn into the chamber 56 through the vent 517, the air blowing head 533, the hose portion 532, and the vent pipe 531. When the hot riveting head 43 passes the air blowing head 533, it causes the head to flip. The air blowing head 533 drives the connecting part 534 and the rotating shaft 535 to rotate and twists the reset part 536 until the hot riveting head 43 contacts the top of the plastic rivet. This completes the switching of the air blowing head 533 from the blowing state to the avoidance state. After the hot riveting head 43 moves down, it drives the piston 55 down and pushes the air blowing head 533 to the horizontal state. Then, the air vent 517 connects with the chamber 56. At this time, when the internal volume of the chamber 56 increases, some of the air drawn in enters the chamber 56 through the air vent 517 and is no longer entirely drawn in by the air blowing head 533.

[0057] After the hot riveting head 43 contacts the plastic rivet, the drive source 41 is turned off, and the hot riveting head 43 is started to heat the plastic rivet. After the hot riveting is completed, the drive is started to move the lifting rod 42 upward. At this time, the cylinder 511 is kept in a state of pressing and fixing the protective plate soft plate under the force of the elastic element 52. The upward movement of the lifting rod 42 drives the hot riveting head 43 and the piston 55 to move upward, which reduces the volume inside the chamber 56. The air inside the chamber 56 is discharged to the outside through the vent 517 and the air blowing head 533.

[0058] As the hot riveting head 43 moves upward, the air blowing head 533 is driven by the reset member 536 to gradually rotate counterclockwise and reset. The air blowing head 533 gradually switches from the avoidance state to the blowing state. After the piston 55 moves above the vent 517, the chamber 56 is no longer connected to the vent 517. At this time, as the internal volume of the chamber 56 decreases, all the air in the chamber 56 is blown to the bottom of the hot riveting head 43 through the vent pipe 531, the hose part 532 and the air blowing head 533.

[0059] The linear actuator 543 is activated to drive the sealing part 544 to seal the second opening 516, so that the cold air in the cooling box 541 can dissipate into the cylinder 511 from the first opening 515. At this time, the air blown out by the air blowing head 533 can cool down the hot riveting head 43 and the plastic rivet after hot riveting. Moreover, the distance between the first opening 515 and the plastic rivet is smaller than the distance between the second opening 516 and the plastic rivet, so that the cold air can be concentrated at the plastic rivet, thereby accelerating the cooling speed of the plastic rivet.

[0060] After the hot riveting head 43 moves up to above the second opening 516, the linear actuator 543 is activated to drive the sealing part 544 down and seal the first opening 515, so that the cold air in the cooling box 541 can escape into the cylinder 511 from the second opening 516. At this time, the air blown out by the air blowing head 533 can cool the hot riveting head 43 and the plastic rivet after hot riveting. Since the distance between the first opening 515 and the hot riveting head 43 is greater than the distance between the second opening 516 and the hot riveting head 43, the cold air is concentrated at the hot riveting head 43, thereby accelerating the cooling speed of the hot riveting head 43.

[0061] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A lightweight magnesium alloy battery casing hot riveting equipment for riveting a protective plate to the casing using plastic rivets, comprising a mounting frame (1) and a casing clamping mechanism (3) and a hot riveting mechanism (4) disposed on the mounting frame (1), wherein the casing clamping mechanism (3) is located below the hot riveting mechanism (4); the hot riveting mechanism (4) comprises a lifting rod (42) capable of moving up and down and a hot riveting head (43) connected to the bottom end of the lifting rod (42), characterized in that, It also includes a cooling mechanism (5), which includes a positioning cylinder (51), an elastic element (52), a ventilation component (53), and a cooling component (54). The positioning cylinder (51) is slidably sleeved on the outside of the lifting rod (42) and the hot riveting head (43) in the up-down direction. The elastic element (52) connects the positioning cylinder (51) and the lifting rod (42) and applies a downward elastic force to the positioning cylinder (51). When the positioning cylinder (51) moves down with the lifting rod (42), it presses against the protective plate to position the protective plate. When the lifting rod (42) moves up, the positioning cylinder (51) moves up behind the lifting rod (42) under the action of the elastic element (52). Both the ventilation component (53) and the cooling component (54) are mounted on the positioning cylinder (51). The cooling component (54) can produce cold air, and the ventilation component (53) is used to blow air to the bottom of the hot riveting head (43) and cool it down in conjunction with the cold air.

2. The hot riveting equipment for lightweight magnesium alloy battery casings according to claim 1, characterized in that, The positioning cylinder (51) includes a cylinder body (511) sleeved on the outside of the connecting rod (42) and the hot riveting head (43), and also includes a blocking part (512) provided inside the cylinder body (511). The hot riveting head (43) is located below the blocking part (512), and the lifting rod (42) passes through the blocking part (512). The hot riveting head (43) moves upward and drives the cylinder body (511) to move upward by pushing the blocking part (512) upward.

3. The hot riveting equipment for lightweight magnesium alloy battery casings according to claim 2, characterized in that, The cooling mechanism (5) also includes a piston (55) that is slidably mounted in the cylinder (511) in the up-down direction. The piston (55) is fixedly connected to the lifting rod (42). A chamber (56) is formed between the top of the piston (55) and the inner wall of the cylinder (511). The ventilation component (53) communicates with the chamber (56). When the piston (55) moves upward, it pushes the air in the chamber (56) and blows it to the hot riveting head (43) by the ventilation component (53).

4. The hot riveting equipment for lightweight magnesium alloy battery casings according to claim 3, characterized in that, The lower inner wall of the cylinder (511) is provided with an installation port (514) that connects the inside and outside. The ventilation component (53) includes a ventilation pipe (531) and an air blowing head (533). The ventilation pipe (531) is connected to the cylinder (511) and communicates with the chamber (56). The air blowing head (533) is connected to the ventilation pipe (531) and is installed in the installation port (514).

5. The hot riveting equipment for lightweight magnesium alloy battery casings according to claim 4, characterized in that, The vent pipe (531) includes a hose portion (532), and the blowing head (533) is rotatably mounted on the inner wall of the mounting port (514) about a horizontally extending axis. The blowing head (533) has an inner end facing the center of the cylinder (511) and an outer end connected to the vent pipe (531). When the blowing head (533) rotates, it has a blowing state in which the inner end is higher than the outer end and the inner end is located in the cylinder (511), and also a clearance state in which the inner end is lower than the outer end and the inner end is located in the mounting port (514). The ventilation assembly (53) also includes a reset member (536), which is used to drive the air blowing head (533) to rotate to the air blowing state; when the positioning cylinder (51) presses against the protective plate and the hot riveting head (43) continues to descend, it pushes the inner end of the air blowing head (533) and drives the air blowing head (533) to rotate to the avoidance state.

6. The hot riveting equipment for lightweight magnesium alloy battery casings according to claim 5, characterized in that, The inner wall of the cylinder (511) is provided with a vent (517) that connects the inside and outside of the cylinder (511). The vent (517) is located above the blocking part (512). The vent (517) is used to communicate with the chamber (56) when the piston (55) moves downward to the end stroke.

7. The hot riveting equipment for lightweight magnesium alloy battery casings according to claims 2-6, characterized in that, The positioning cylinder (51) also includes a fastener (513) for fixing the ventilation assembly (53) to the outside of the cylinder (511).

8. The hot riveting equipment for lightweight magnesium alloy battery casings according to claim 1, characterized in that, The refrigeration assembly (54) includes a refrigeration box (541) and a refrigeration plate (542). The refrigeration box (541) is connected to the outside of the cylinder (511), and the refrigeration plate (542) is connected inside the refrigeration box (541). The refrigeration plate (542) is used to generate cold air inside the refrigeration box (541). The positioning cylinder (51) has an opening that connects the refrigeration box (541) and the inside of the positioning cylinder (51) so that the cold air can escape into the positioning cylinder (51).

9. The hot riveting equipment for lightweight magnesium alloy battery casings according to claim 8, characterized in that, The opening includes opening one (515) and opening two (516) located above opening one (515).

10. The hot riveting equipment for lightweight magnesium alloy battery casings according to claim 9, characterized in that, The refrigeration assembly (54) also includes a linear actuator (543) fixed on the refrigeration box (541) and a sealing part (544). The sealing part (544) is fixedly connected to the vertical telescopic end of the linear actuator (543) and is used to seal opening one (515) or opening two (516).

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