A filter processing end cover and cylinder spot welding machine

Abstract

This invention relates to the field of welding equipment technology, and provides a spot welding machine for end caps and cylinders in filter processing. The machine includes a base frame, a spot welding unit, a material support, a cylinder support, and a top cover unit. A circulating conveyor chain with cyclic transmission is provided on the base frame. The spot welding unit is located on one side of the circulating conveyor chain and has a laser welding body for spot welding. A material support for supporting the filter cylinder is provided on the circulating conveyor chain. The cylinder support is rotatably mounted on the material support and has a bottom support wheel supporting the bottom of the filter cylinder and a side wall wheel abutting against the outer wall of the filter cylinder. The top cover unit is lifted and lowered above the circulating conveyor chain and is used for hoisting the filter end caps. Several cylinder supports are arranged circumferentially around the filter cylinder. This technical solution solves the problem of related technologies where multiple filters require multiple tooling fixtures, resulting in a large number of fixtures being stacked, occupying a lot of space, and having a low overall utilization rate. It improves the versatility of the fixtures and increases the overall utilization rate of the fixture equipment.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of welding equipment technology, specifically to a spot welding machine for end caps and cylinders used in filter processing. Background Technology

[0002] A filter is an accessory that uses filter paper to filter impurities or gases. Generally, it refers to automotive filters, which are engine components. Based on their filtration function, filters can be categorized as: oil filters, fuel filters (gasoline filters, diesel filters, oil-water separators, hydraulic filters, etc.), air filters, and cabin air filters.

[0003] In the existing technology, the housing of oil filter or fuel filter is mostly made of metal. The housing generally includes two parts: end cap and cylinder. The cylinder is basically cylindrical and contains the filter element body. When assembling the end cap and cylinder, it is necessary to adjust their relative positions to achieve coaxiality and concentricity as much as possible. Then, they are fixed by fixtures or by manual means to keep them relatively stationary. Finally, they are connected together by welding.

[0004] During welding, if the end cap and cylinder are kept relatively stationary by manual labor, there will be problems with poor product consistency and low work efficiency. Some people have suggested using fixtures to replace this manual labor, but considering the diversity of filter models, it will inevitably result in a large number of fixtures of various models being piled up together, causing the overall utilization rate of the fixture equipment to be low and the space occupied to be large. Therefore, it is necessary to improve and optimize the existing technology. Summary of the Invention

[0005] To overcome the above-mentioned defects, embodiments of the present invention provide a spot welding machine for end caps and cylinders for filter processing, which solves the problem in related technologies where multiple filters correspond to multiple tooling fixtures, resulting in a large number of fixtures being piled up, occupying a lot of space and having a low overall utilization rate.

[0006] According to one aspect, at least one embodiment of the present invention provides a spot welding machine for end caps and cylinders used in filter processing, comprising: A base frame, on which a circulating conveyor chain with cyclic transmission is provided; A spot welding unit is located on one side of the circulating conveyor chain. The spot welding unit has a laser welding body for spot welding the filter cylinder and the filter end cap. A material support is provided on the circulating conveyor chain, and the material support is used to support the filter cylinder; The cylinder support is rotatably mounted on the material support. The cylinder support has a bottom support wheel for supporting the bottom of the filter cylinder and a side wall wheel for abutting against the outer wall of the filter cylinder. The upper cover unit is lifted and positioned above the circulating conveyor chain. The upper cover unit is used to hoist the filter end cover and place the filter end cover on the upper end of the filter cylinder. The number of the cylindrical supports is several, and the several cylindrical supports are distributed in a circle around the filter cylinder.

[0007] For example, in a spot welding machine for end caps and cylinders for filter processing provided in at least one embodiment of the present invention, the cylinder support includes: The bottom support arm is rotatably mounted on the material support and can swing up and down; A bottom-supporting auxiliary arm is provided on the bottom-supporting main arm, and the bottom-supporting auxiliary arm and the bottom-supporting main arm are arranged at an angle. The bottom-supporting wheel is rotatably located at the end of the bottom-supporting auxiliary arm away from the bottom-supporting main arm.

[0008] For example, in a spot welding machine for end caps and cylinders for filter processing provided in at least one embodiment of the present invention, the cylinder support further includes: Side wall pressure seat, provided on the bottom support main arm; A sidewall pressure head is slidably mounted on the sidewall pressure seat, and a sidewall wheel is rotatably mounted on the sidewall pressure head; The sidewall abutment elastic element acts on the sidewall pressure seat at one end and on the sidewall pressure head at the other end. The sidewall abutment elastic element is used to provide the force for the sidewall pressure head to press against the peripheral wall of the filter cylinder.

[0009] For example, in a spot welding machine for end caps and cylinders for filter processing provided in at least one embodiment of the present invention, the cylinder support further includes: A limiting seat is disposed on the material support and located below the hinge point between the bottom support arm and the material support. The limiting seat is used to abut against the bottom support arm to limit the downward swing amplitude of the bottom support arm.

[0010] For example, in a spot welding machine for end caps and cylinders for filter processing provided in at least one embodiment of the present invention, the cylinder support further includes: The reset elastic element has one end acting on the bottom support main arm and the other end acting on the limiting seat. The reset elastic element is used to provide the bottom support main arm with an upward swinging force.

[0011] For example, in a spot welding machine for a filter processing end cap and cylinder provided in at least one embodiment of the present invention, the filter end cap has a lifting hole for hoisting, and the upper cover unit includes: The upper cover cross arm is lifted and positioned above the circulating conveyor chain; A lifting cover tube is provided on the upper cover cross arm in the vertical direction. The lifting cover tube is used to pass through the lifting hole to lift and place the filter end cover. The cover rod is swaying up and down on the cover tube, and the cover rod is configured to swing upward and then abut against the lower surface of the filter end cover.

[0012] For example, in a spot welding machine for end caps and cylinders for filter processing provided in at least one embodiment of the present invention, the upper cover unit further includes: A sliding rod is slidably disposed inside the lifting cover tube; The cover connecting rod has one end hinged to the slide rod, and the other end slides and is hinged to the cover rod; The cover support rod is configured to push the cover support rod to swing up and down under the up-and-down sliding action of the slide rod.

[0013] For example, in a spot welding machine for end caps and cylinders for filter processing provided in at least one embodiment of the present invention, the upper cover unit further includes: The pressure cap is provided in several parts, and all of the pressure caps are provided on the outer wall of the cover tube and located above the cover support rod. The pressure caps are distributed around the circumference of the cover tube. The pressure caps are configured to press against the upper end face of the filter end cap under the downward movement of the cover tube.

[0014] For example, in a spot welding machine for end caps and cylinders for filter processing provided in at least one embodiment of the present invention, the number of the cover support rods and the cover support connecting rods are both several, and the several cover support rods are distributed circumferentially along the cover tube.

[0015] For example, in a spot welding machine for end caps and cylinders for filter processing provided in at least one embodiment of the present invention, the number of lifting cap tubes is several and they are arranged one-to-one with the lifting holes, and the several lifting cap tubes are distributed along the circumference of the filter end cap.

[0016] The beneficial effects of the embodiments of the present invention are as follows: In this invention, the cooperation between the circulating conveyor chain and the material support enables continuous production, significantly improving work efficiency compared to the intermittent operation mode of a single set of fixtures. Several circumferentially distributed cylindrical supports, through the coordinated action of bottom support wheels and side wall wheels, can adapt to filter cylinders of different diameters: when the diameter of the filter cylinder changes, the cylindrical support can rotate around its axis to adjust its angle, ensuring that the side wall wheels always remain in contact with the outer wall of the filter cylinder, and the bottom support wheels always support the bottom of the filter cylinder. This eliminates the need to change special fixtures, meeting the processing requirements of various filter models and solving the problems of large space occupation and low utilization rate caused by the accumulation of multiple fixtures in existing technologies. The rotating design of the bottom support rollers and side wall rollers reduces the frictional resistance of the filter cylinder during placement and positioning, preventing scratches on the surface of the filter cylinder. At the same time, it ensures the stability of the filter cylinder during the welding process. Combined with the laser welding body, it can achieve precise butt welding between the filter end cap and the filter cylinder, improving the consistency of product quality and overcoming the defects of large product condition differences caused by manual fixing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the joint between the material support and the cylinder support (with filter cylinder and filter end cap) in the embodiment; Figure 3 for Figure 2 A magnified view of a portion at point A in the embodiment; Figure 4 for Figure 1 A schematic diagram of the structure of the upper cover unit (with filter cylinder and filter end cap) in the embodiment; Figure 5 for Figure 4 A magnified view of a portion of point B in the embodiment; In the diagram: 1. Base frame, 2. Circulating conveyor chain, 3. Spot welding unit, 41. Filter cylinder, 42. Filter end cap, 43. Lifting hole, 5. Material support, 6. Cylinder support, 61. Bottom support wheel, 62. Side wall wheel, 63. Bottom support main arm, 64. Bottom support auxiliary arm, 65. Side wall pressure seat, 651. Guide rod, 66. Side wall pressure head, 661. Guide tube, 67. Side wall abutment elastic element, 68. Limiting seat, 69. Reset elastic element, 7. Top cover unit, 71. Top cover cross arm, 72. Lifting cover tube, 73. Cover support rod, 74. Sliding rod, 75. Cover support connecting rod, 76. Cover fitting. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0020] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0021] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0024] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] like Figures 1-5 As shown, this invention illustrates a spot welding machine for processing end caps and cylinders of a filter, according to an embodiment of the present invention. The base frame 1 of the spot welding machine serves as the foundation of the device. A circulating conveyor chain 2 is arranged along the length of the base frame 1 and achieves circulating transmission under the action of a driving device (e.g., an electrically driven motor) in the prior art. A material support 5 is fixed to a link of the circulating conveyor chain 2 and moves synchronously with it. The material support 5 is generally square in shape, with a bottom plate at the lower end to prevent workpiece leakage. A cylinder support 6 is rotatably connected to the material support 5 via a rotating shaft. The axle of its bottom support wheel 61 is parallel to the surface of the material support 5, used to contact and support the bottom edge of the filter cylinder 41 from below; the axle of the side wall wheel 62 is parallel to the upper surface of the bottom plate of the material support 5, used to abut against the outer peripheral wall of the filter cylinder from the horizontal direction. The upper cover unit 7 is lifted and positioned above the circulating conveyor chain 2. The filter end cover 42 is hoisted onto the filter cylinder 41 through the upper cover unit 7, and the filter end cover 42 is placed on the upper end of the filter cylinder 41.

[0026] Several cylindrical supports 6 are arranged in a circle around the center of the material support 5, with the bottom support wheel 61 and side wall wheel 62 of each cylindrical support 6 facing the center of the circle. The laser welding body of the spot welding unit 3 is located on one side of the circulating conveyor chain 2, and its welding head is aligned with the conveying path of the circulating conveyor chain 2. The laser welding body is selected from welding equipment that can realize laser welding in the prior art. The spot welding unit 3 has a multi-axis robotic arm in the prior art, which can be used to adjust the spot welding position of the laser welding body. The number of spot welding units 3 is generally two, distributed on both sides of the circulating conveyor chain 2, but the number can also be selected according to the product needs.

[0027] During operation, the filter cylinder 41 is placed on the material support 5, with the bottom of the filter cylinder 41 contacting the bottom support rollers 61 of each cylinder support 6. Under the weight of the filter cylinder 41 itself, the bottom support rollers 61 drive the cylinder supports 6 to rotate around the axis, causing each side wall roller 62 to synchronously approach and abut against the outer wall of the filter cylinder 41. Since several cylinder supports 6 are circumferentially distributed, the side wall rollers 62 provide radial constraint to the filter cylinder 41 from multiple directions, while the bottom support rollers 61 provide axial support from below, together achieving the positioning of the filter cylinder 41 on the material support 5. The circulating conveyor chain 2 moves the material support 5 and the positioned filter cylinder 41 to the spot welding unit 3. Then, with the help of the upper cover unit 7, the filter end cap 42 is placed on the upper end of the filter cylinder 41, and the laser welding body is activated to spot weld the connection between the filter end cap 42 and the filter cylinder 41. After welding is completed, the circulating conveyor chain 2 continues to move the material tray 5 to the next process, while the subsequent material trays 5 enter the welding position in sequence to achieve continuous operation.

[0028] The cooperation between the circulating conveyor chain 2 and the material support 5 enables continuous production, significantly improving work efficiency compared to the intermittent operation mode of a single set of fixtures. Several circumferentially distributed cylinder supports 6, through the coordinated action of the bottom support rollers 61 and the side wall rollers 62, can adapt to filter cylinders 41 of different diameters: when the diameter of the filter cylinder 41 changes, the cylinder support 6 can rotate around the pivot to adjust the angle, so that the side wall rollers 62 can be in contact with the outer wall of the filter cylinder 41, and the bottom support rollers 61 always maintain support on the bottom of the filter cylinder 41. It can meet the processing needs of various models of filters without changing special fixtures, solving the problem of large space occupation and low utilization rate caused by the accumulation of multiple fixtures in the prior art. The rotating configuration of the bottom support wheel 61 and the side wall wheel 62 reduces the frictional resistance of the filter cylinder 41 during placement and positioning, avoids scratches on the surface of the filter cylinder 41, and ensures the stability of the filter cylinder 41 during welding. In conjunction with the laser welding body, it can achieve precise butt welding between the filter end cap 42 and the filter cylinder 41, improve the consistency of product quality, and overcome the defects of large product condition differences caused by manual fixing.

[0029] In some examples, the structure of the spot welding machine is refined, for example, as Figures 1-3 As shown, the main support arm 63 in the cylinder support 6 is connected to the material support 5 via a hinge shaft. The axis of the hinge shaft is parallel to the conveying direction of the circulating conveyor chain 2, allowing the main support arm 63 to rotate up and down around the hinge shaft. One end of the auxiliary support arm 64 is fixed to the side of the main support arm 63 away from the hinge shaft, and the other end extends towards the center of the material support 5. A fixed angle is formed between the auxiliary support arm 64 and the main support arm 63. The bottom support wheel 61 is rotatably connected to the end of the auxiliary support arm 64 away from the main support arm 63 via a wheel axle. There is a gap between the wheel surface of the bottom support wheel 61 and the upper surface of the bottom plate of the material support 5.

[0030] When the filter cylinder 41 is placed on the material support 5, the bottom edge of the filter cylinder 41 contacts the wheel surface of the support wheel 61. Under the weight of the filter cylinder 41, the support wheel 61 is subjected to downward pressure, which drives the support arm 64 to rotate downward around the hinge axis of the support arm 63, thereby reducing the angle between the support arm 63 and the material support 5. During the rotation of the support arm 64 with the support arm 63, the support arm 64 always maintains a constant angle with the support arm 63, ensuring that the support wheel 61 maintains a stable supporting posture for the bottom of the filter cylinder 41.

[0031] The bottom support main arm 63 is vertically and vertically connected to the material support 5. Combined with the angled arrangement of the bottom support auxiliary arm 64 and the bottom support main arm 63, a clearance space is formed to avoid the lower edge of the filter cylinder 41. During rotation, the clearance space prevents the bottom of the filter cylinder 41 from being squeezed or interfered with by the bottom support auxiliary arm 64 and the bottom support main arm 63, thus avoiding separation of the bottom support wheel 61 from the bottom of the filter cylinder 41. The included angle between the main support arms 63 allows the support arm 6 to support filter cylinders 41 of various sizes, preventing interference between the bottom of the filter cylinder 41 and the support arm 64 when the diameter of the filter cylinder 41 changes, especially when the diameter of the filter cylinder 41 increases. This prevents scratches on the outer surface of the filter cylinder 41. Simultaneously, the support wheels 61 change their relative height to the support arm 5 by rotating the main support arms 63, ensuring effective support for the bottom of filter cylinders 41 of different sizes. The rotation of the support wheels 61 reduces friction with the bottom of the filter cylinder 41, while the rotation of the main support arms 63 provides a buffer space for the placement of the filter cylinder 41, reducing positioning deviations caused by impacts during placement. This further improves the positioning stability of the filter cylinder 41 on the support arm 5, laying the foundation for precise welding of the filter end cap 42 to the filter cylinder 41.

[0032] In some examples, the structure of the spot welding machine is refined, for example, as Figures 1-3 As shown, the side wall pressure seat 65 in the cylinder support 6 is fixed to the side of the support main arm 63. The side wall pressure seat 65 is provided with a guide rod 651 on the side facing the center of the material support 5. The side wall pressure head 66 is provided with a guide tube 661 at the end away from the center of the material support 5. The guide tube 661 is sleeved on the guide rod 651, so that the side wall pressure head 66 can slide along the guide rod 651 in the direction of approaching or moving away from the center of the material support 5.

[0033] The sidewall wheel 62 is rotatably connected to one end of the sidewall pressure head 66 near the center of the material support 5 via a wheel axle. The sidewall abutment elastic member 67 is sleeved on the outer periphery of the guide tube 661. One end of the sidewall abutment elastic member 67 abuts against the sidewall pressure seat 65, and the other end abuts against the sidewall pressure head 66. The sidewall abutment elastic member 67 is a spring from the prior art.

[0034] When the filter cylinder 41 is placed on the bottom support roller 61, the bottom support main arm 63 rotates downward under the gravity of the filter cylinder 41, driving the side wall pressure seat 65 to rotate synchronously. When the side wall roller 62 and the outer wall of the filter cylinder 41 come into contact and interfere, as the filter cylinder 41 continues to fall, the outer wall of the filter cylinder 41 presses against the side wall pressure head 66, causing the side wall pressure head 66 to gradually approach the side wall pressure seat 65 along the extension direction of the guide rod 651. The side wall abutment elastic element 67 is forced to contract and accumulate elastic force; the elastic force accumulated by the side wall abutment elastic element 67 presses against the outer wall of the filter cylinder 41, providing a strong clamping force; avoiding vibration during the conveying process that could cause the filter cylinder 41 to jump or misalign. At the same time, the sliding side wall pressure head 66 and the retractable side wall abutment elastic element 67 expand the applicability of the material support 5.

[0035] The sliding engagement between the sidewall pressure seat 65 and the sidewall pressure head 66 allows the sidewall wheel 62 to adapt to filter housings 41 of different diameters, further expanding the device's compatibility with various filter models. The continuous thrust applied by the sidewall abutment elastic element 67 ensures that the sidewall wheel 62 always maintains reliable contact with the outer wall of the filter housing 41. Even if the filter housing 41 experiences slight eccentricity during placement, the deformation of the elastic element compensates for this, ensuring the centering accuracy of the filter housing 41. The guide rod 651 and the guide tube 661 provide guidance for the sliding of the sidewall pressure head 66, preventing it from tilting under force and ensuring the stability of the radial constraint direction of the sidewall wheel 62 on the filter housing 41. The fixed connection between the bottom support arm 63 and the side wall pressure seat 65 enables the bottom support wheel 61 to provide axial support to the filter cylinder 41 and the side wall wheel 62 to provide radial constraint to the filter cylinder 41 to form a linkage. The gravity of the filter cylinder 41 when it is placed triggers the rotation of the bottom support arm 63, and the linkage of the structure strengthens the contact effect of the side wall wheel 62, thereby improving the coordination and stability of the overall positioning structure.

[0036] In some examples, the structure of the spot welding machine is refined, for example, as Figures 1-3 As shown, the limiting seat 68 is fixed to the upper surface of the material support 5 and is located below the hinge point between the bottom support main arm 63 and the material support 5. The limiting seat 68 has an arc-shaped or flat limiting surface on the side facing the bottom support main arm 63, which is opposite to the side of the bottom support main arm 63 near the hinge point.

[0037] One end of the reset elastic element 69 is fixedly connected to the support arm 63 near the hinge point. As the support arm 63 swings downward, the other end gradually approaches and abuts against the limiting seat 68 on the side facing the support arm 63. In the initial posture, the reset elastic element 69 is in a slightly compressed state, and the support arm 63 is separated from the limiting seat 68. The reset elastic element 69 is a spring from the prior art.

[0038] When the filter cylinder 41 is placed on the support roller 61, the support arm 63 rotates downward under the gravity of the filter cylinder 41, and the support arm 63 approaches the limiting seat 68. At this time, the reset elastic element 69 is compressed, generating elastic potential energy. When the filter cylinder 41 is removed from the material support 5, the reset elastic element 69 releases the elastic potential energy, generating a force that pushes the support arm 63 to rotate upward, causing the support arm 63 to rotate away from the limiting seat 68 until the support arm 63 separates from the limiting seat 68.

[0039] The limiting seat 68 provides a clear positioning reference for the bottom support arm 63 by limiting the maximum downward rotation angle of the bottom support arm 63. When the filter cylinder 41 is not placed, the bottom support arm 63 compresses the reset elastic element 69 under its own weight, and the reset elastic element 69 is in a slightly compressed state. When the filter cylinder 41 is placed, the bottom support arm 63 rotates downward under the weight of the filter cylinder 41. The setting of the limiting seat 68 also avoids the bottom support arm 63 from rotating excessively, causing the bottom support wheel 61 to separate from the bottom of the filter cylinder 41, resulting in an unstable and inconsistent fixed state of the filter cylinder 41. At the same time, the downward rotating bottom support arm 63 compresses the reset elastic element 69, and the reset elastic element 69 accumulates elastic potential energy. After the filter cylinder 41 is removed, the reset elastic element 69 releases elastic potential energy, providing an upward rotational force for the bottom support main arm 63, ensuring that the bottom support main arm 63 can quickly return to its initial position after the filter cylinder 41 is removed.

[0040] When the filter cylinder 41 is placed, the elastic force of the reset elastic element 69 balances the weight of the filter cylinder 41, making the rotation of the bottom support arm 63 smoother and reducing the impact when placing the filter cylinder 41. Combined with the positioning function of the bottom support wheel 61 and the side wall wheel 62, this further improves the positioning stability of the filter cylinder 41. The cooperation between the reset elastic element 69 and the limiting seat 68 forms a two-way constraint mechanism for the bottom support arm 63, which limits excessive rotation and ensures reset accuracy, enhancing the overall reliability of the cylinder support 6 structure.

[0041] In some examples, the structure of the spot welding machine is refined, for example, as Figures 1-5As shown, the upper cover cross arm 71 is positioned above the circulating conveyor chain 2 via a vertical guide structure and can slide vertically. The hanging cover tube 72 is fixed to the lower surface of the upper cover cross arm 71, with its axis extending vertically. The outer diameter of the hanging cover tube 72 is smaller than the inner diameter of the hanging hole 43 on the filter end cover 42. The middle part of the cover support rod 73 is connected to the lower outer wall of the hanging cover tube 72 via a hinge shaft. The axis of the hinge shaft is perpendicular to the axis of the hanging cover tube 72, allowing the cover support rod 73 to swing up and down around the hinge shaft. The end of the cover support rod 73 closest to the axis of the hanging cover tube 72 is a free end, which can swing into or out of the radial range of the hanging cover tube 72. The upper cover cross arm 71 has a built-in telescopic structure (e.g., a built-in hydraulic telescopic structure) to extend and retract to adjust the position of the hanging cover tube 72.

[0042] When it is necessary to lift the filter end cap 42, the upper cover horizontal arm 71 slides downward, causing the lifting tube 72 to pass through the lifting hole 43 on the filter end cap 42, so that the lower end of the lifting tube 72 extends out of the lifting hole 43. At this time, the cover support rod 73 swings upward, and its free end rotates away from the axis of the lifting tube 72 until the surface of the cover support rod 73 abuts against the lower surface of the filter end cap 42. The upper cover horizontal arm 71 slides upward, and the filter end cap 42 is lifted by the coordinated action of the lifting tube 72 and the cover support rod 73. When the filter end cap 42 is conveyed to the upper end of the filter cylinder 41 in the material holder 5, the upper cover cross arm 71 slides downward, so that the lower surface of the filter end cap 42 contacts the upper end surface of the filter cylinder 41. Then the cover support rod 73 swings downward, and its free end gradually approaches the axis of the cover lifting tube 72, releasing the contact with the lower surface of the filter end cap 42. The upper cover cross arm 71 continues to slide upward, driving the cover lifting tube 72 to be pulled out from the lifting hole 43, thus completing the placement of the filter end cap 42.

[0043] The sliding motion of the upper cover crossarm 71 provides a motion basis for the hoisting and transfer of the filter end cover 42. Combined with the cooperation of the lifting cover tube 72 and the lifting hole 43, it achieves precise positioning of the filter end cover 42 during transfer, ensuring that the filter end cover 42 is accurately aligned with the filter cylinder 41 below. The up-and-down swing design of the cover support rod 73, through a simple structural change, achieves reliable support and release of the filter end cover 42, preventing it from falling off during transfer and ensuring stability during placement. The setting of the lifting cover tube 72 passing through the lifting hole 43 ensures that the axis of the filter end cover 42 is parallel or coincident with the axis of the lifting cover tube 72, reducing the swaying of the filter end cover 42 during transfer and helping to maintain the horizontal posture of the filter end cover 42, thus ensuring subsequent coaxial docking with the filter cylinder 41. The overall structure of the top cover unit 7 automates the placement process of the filter end cover 42, replacing manual placement. Combined with the continuous conveying of the circulating conveyor chain 2, it further improves production efficiency. At the same time, it avoids the relative positional deviation between the filter end cover 42 and the filter cylinder 41 that may be caused by manual operation, which helps to ensure the consistency of welding quality.

[0044] In some examples, the structure of the spot welding machine is refined, for example, as Figures 1-5 As shown, the lifting cap tube 72 has a through-hole along the axial direction inside, and the sliding rod 74 passes through the sliding hole and can slide up and down along the axial direction of the sliding hole. One end of the cover-supporting connecting rod 75 is hinged to the lower end of the sliding rod 74 through a first hinge shaft, the axis of the first hinge shaft being perpendicular to the axis of the sliding rod 74. The cover-supporting rod 73 has an elongated hole located away from its hinge point with the lifting cap tube 72, the length of the elongated hole extending along the length of the cover-supporting rod 73. The other end of the cover-supporting connecting rod 75 is connected to the elongated hole through a second hinge shaft, the axis of the second hinge shaft being parallel to the axis of the first hinge shaft, and the second hinge shaft can slide along the length of the elongated hole. The diameter of the lifting cap tube 72 is smaller than the diameter of the lifting hole 43.

[0045] When the slide rod 74 slides downward along the sliding hole of the cover tube 72, one end of the cover support rod 75 moves downward with the slide rod 74, and the other end slides along the elongated hole of the cover support rod 73 through the second hinge axis. At the same time, it pulls the cover support rod 73 to swing downward around its hinge axis with the cover tube 72, causing the free end of the cover support rod 73 to rotate towards the axis of the cover tube 72. When the slide rod 74 slides upward along the sliding hole, one end of the cover support rod 75 moves upward with the slide rod 74, and the other end slides through the other end of the elongated hole of the second hinge axis, pushing the cover support rod 73 to swing upward around the hinge axis, causing the free end of the cover support rod 73 to move away from the axis of the cover tube 72. At the same time, the outer surface of the cover support rod 73 gradually approaches the lower surface of the filter end cap 42 (at the lower port of the hanging hole 43) until it makes a squeezing contact.

[0046] The sliding engagement between the slide rod 74 and the cover tube 72 provides a stable driving force for the swing of the cover rod 73. The axial movement of the slide rod 74 is converted into the swinging motion of the cover rod 73 via the transmission of the cover connecting rod 75, achieving linkage control of the mechanical structure. The elongated hole engagement between the cover connecting rod 75 and the cover rod 73 provides adjustment space for their relative movement, avoiding structural interference during movement and ensuring precise control of the swing angle of the cover rod 73. The axial sliding stroke of the slide rod 74 can directly control the swing amplitude of the cover rod 73, allowing the contact force and range of the cover rod 73 against the lower surface of the filter end cover 42 to be adjusted by the position of the slide rod 74, adapting to the lifting requirements of filter end covers 42 of different thicknesses or structures. This linkage structure makes the swinging motion of the cover rod 73 more stable and reliable, reducing the risk of shaking or falling off during the hoisting of the filter end cover 42. Together with the positioning function of the cover tube 72, it further improves the accuracy of the transfer and placement of the filter end cover 42, and provides a guarantee for the precise docking of the filter end cover 42 with the filter cylinder 41.

[0047] In some examples, the structure of the spot welding machine is refined, for example, as Figures 1-5As shown, the pressure cap 76 is fixed to the outer wall of the cover tube 72 and is distributed above the cover support rod 73 along the axial direction of the cover tube 72. Several pressure caps 76 are distributed circumferentially around the axis of the cover tube 72, and the end of each pressure cap 76 away from the cover tube 72 extends radially outward from the cover tube 72, with its lower end face being a plane.

[0048] When the lifting cap tube 72 slides downward with the upper cover cross arm 71 until it passes through the lifting hole 43 of the filter end cap 42, the cover support rod 73 swings upward and abuts against the lower surface of the filter end cap 42. At the same time, the lower end face of the cover pressing member 76 gradually approaches the upper end face of the filter end cap 42. When the upper cover cross arm 71 drives the lifting cap tube 72 to slide upward and lift the filter end cap 42, the lower end face of the cover pressing member 76 contacts the upper end face of the filter end cap 42, and cooperates with the cover support rod 73 to clamp the filter end cap 42 from both the upper and lower sides. When the filter end cap 42 is moved to the upper end of the filter cylinder 41, the upper cover cross arm 71 slides down to make the lower surface of the filter end cap 42 fit against the upper end surface of the filter cylinder 41. The pressure cap 76 continues to move down with the lifting cover tube 72, and its lower end surface presses against the upper end surface of the filter end cap 42, stopping the upper cover cross arm 71 from sliding up and down. Then, an external force is applied to drive the slide rod 74 to slide down, and the cover support rod 73 swings down to release the support of the filter end cap 42. The pressure cap 76 remains in a pressing state until the spot welding operation of the filter cylinder 41 and the filter end cap 42 is completed.

[0049] The upper and lower mating of the pressure cap 76 and the cover rod 73 forms a clamping structure for the filter end cap 42, preventing the filter end cap 42 from shifting or falling off due to vibration or inertia during transportation, thus improving the stability of the filter end cap 42 transportation. The pressing action of the pressure cap 76 when the filter end cap 42 is placed ensures that the filter end cap 42 and the upper end face of the filter cylinder 41 are tightly fitted, eliminating the gap between them, providing a good foundation for subsequent spot welding, and reducing welding defects caused by poor fit. Several circumferentially distributed pressure caps 76 ensure that the pressure on the filter end cap 42 is evenly distributed, preventing the filter end cap 42 from deforming due to excessive local stress, while ensuring the coaxiality of the filter end cap 42 and the filter cylinder 41. Together with the positioning function of the cover tube 72, this further improves the docking accuracy between the two. The synchronous movement of the pressure cap 76 with the lifting cap tube 72 enables the clamping, conveying, and pressing actions to be linked through the same drive source, simplifying structural control and enhancing the coordination of the upper cover unit 7.

[0050] In some examples, the structure of the spot welding machine is refined, for example, as Figures 1-5As shown, in the upper cover unit 7 of the spot welding machine for the filter end cap 42 and filter cylinder 41 used in filter processing, several cover support rods 73 are circumferentially distributed around the axis of the cover tube 72. One end of each cover support rod 73 is connected to the lower outer wall of the cover tube 72 through a hinge shaft. The axis of the hinge shaft is perpendicular to the axis of the cover tube 72 and is on the same horizontal plane. The end of each cover support rod 73 away from the axis of the cover tube 72 is a free end, and the end close to the axis of the cover tube 72 is hinged to the slide rod 74 through a cover support connecting rod 75. The hinge points of each cover support connecting rod 75 and slide rod 74 are evenly distributed along the circumference of the slide rod 74.

[0051] When the slide rod 74 slides down along the sliding hole of the cover tube 72, each cover connecting rod 75 pulls the corresponding cover rod 73 to swing down around the hinge axis. The free ends of all cover rods 73 rotate towards the axis of the cover tube 72 at the same time, releasing the contact with the lower surface of the filter end cover 42. When the slide rod 74 slides upward, each cover connecting rod 75 simultaneously pushes the corresponding cover rod 73 to swing upward. The free ends of all cover rods 73 move away from the axis of the cover tube 72, causing the cover rods 73 to abut against the lower surface of the filter end cover 42. At the same time, the side of the cover rod 73 facing the filter abuts against the lower edge of the inner wall of the lifting hole 43. With the help of several cover rods 73 distributed around the circumference, the cover tube 72 and the lifting hole 43 are in a coaxial state, which improves the coaxiality between the filter end cover 42 and the filter cylinder 41 and avoids the problem of misalignment of the spot welding of the filter end cover 42 and the filter cylinder 41.

[0052] Several circumferentially distributed cover rods 73 simultaneously support the filter end cap 42 from multiple positions on the lower edge of the inner wall of the lifting hole 43, ensuring that the supporting force on the filter end cap 42 is evenly distributed circumferentially. This prevents the filter end cap 42 from tilting or deforming due to uneven force, ensuring that the filter end cap 42 maintains a horizontal posture during transfer. The synchronous swing of the cover rods 73 is achieved through the linkage between the sliding rod 74 and the cover connecting rod 75, ensuring that the supporting or releasing actions of each cover rod 73 on the filter end cap 42 are completely consistent, further improving the balance of force on the filter end cap 42. The evenly distributed cover rods 73 cooperate with the pressing cover 76 to form a multi-point clamping effect, enhancing the constraint effect on the filter end cap 42. Even if there is a slight deviation in the center of gravity of the filter end cap 42, the offsetting trend can be offset by multi-point support, improving the stability of the transfer process. The circumferential distribution of the cover rod 73 and the center positioning of the cover tube 72 work together to ensure that the center of the filter end cover 42 is aligned with the axis of the cover tube 72, providing a reliable guarantee for the coaxial connection of the filter end cover 42 and the filter cylinder 41. Combined with the spot welding unit 3, precise welding can be achieved.

[0053] In some examples, the structure of the spot welding machine is refined, for example, as Figures 1-5As shown, the filter end cap 42 has several lifting holes 43, which are evenly distributed along the circumference of the filter end cap 42 and arranged in a circle with the central axis of the filter end cap 42 as the center. The number of lifting cap tubes 72 corresponds one-to-one with the lifting holes 43. Each lifting cap tube 72 is fixed to the lower surface of the upper cover cross arm 71, evenly distributed along the circumference of the upper cover cross arm 71, and arranged in a circle with the axis corresponding to the central axis of the filter end cap 42 as the center. Each lifting cap tube 72 has a cover support rod 73 at its lower end, and the structure of the cover support rod 73 and its connection method with the lifting cap tube 72 are consistent.

[0054] When the filter end cap 42 is hoisted, the upper cover horizontal arm 71 drives all the lifting cap tubes 72 to slide downwards synchronously. Each lifting cap tube 72 passes through the corresponding lifting hole 43, and the cover support rods 73 on each lifting cap tube 72 swing upwards synchronously and abut against the lower surface of the filter end cap 42 (lower edge of the inner wall of the lifting hole 43). When the upper cover horizontal arm 71 slides upwards, all the lifting cap tubes 72 together drive the filter end cap 42 to rise and be moved. When the filter end cap 42 is transported to the upper end of the filter cylinder 41, each lifting cap tube 72 slides downwards synchronously to make the filter end cap 42 fit against the filter cylinder 41. Then, each cover support rod 73 swings downwards synchronously to release the support of the filter end cap 42, maintaining the pressing state of the cover 76 until the spot welding operation is completed. Then, the upper cover horizontal arm 71 drives all the lifting cap tubes 72 to be pulled out from the corresponding lifting hole 43.

[0055] The one-to-one correspondence between several lifting holes 43 and the lifting cap tubes 72 ensures that the filter end cap 42 receives multiple evenly distributed support points during transport, preventing tilting or deformation that might occur with single-point support and ensuring the filter end cap 42 remains horizontal during transport. The lifting cap tubes 72 are circumferentially distributed around the central axis of the filter end cap 42, matching the distribution of the lifting holes 43 on the filter end cap 42. This ensures that the force on the filter end cap 42 is uniformly and symmetrically distributed around its central axis, further improving the stability and balance of the filter end cap 42 during transport. The synergistic effect of multiple lifting cap tubes 72 enhances the positioning effect of the filter end cap 42, ensuring precise alignment between the central axis of the filter end cap 42 and the central axis of the filter cylinder 41 below. This provides multiple positioning guarantees for the coaxial docking of the filter end cap 42 and the filter cylinder 41, reducing overall docking errors caused by positioning deviations of a single lifting cap tube 72. This multi-point lifting structure, in conjunction with the pressure cap 76 and the cover rod 73, ensures that the filter end cap 42 maintains a stable posture and precise position during lifting, transfer, and placement. Together with the positioning structure of the filter cylinder 41, it significantly improves the docking accuracy before welding, which helps to ensure the consistency of welding quality.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A spot welding machine for end caps and cylinders used in filter processing, characterized in that, include: Base frame (1), on which a circulating conveyor chain (2) with cyclic transmission is provided; A spot welding unit (3) is located on one side of the circulating conveyor chain (2). The spot welding unit (3) has a laser welding body for spot welding the filter cylinder (41) and the filter end cap (42). Material support (5) is provided on the circulating conveyor chain (2), and the material support (5) is used to support the filter cylinder (41). The cylinder support (6) is rotatably mounted on the material support (5). The cylinder support (6) has a bottom support wheel (61) for supporting the bottom of the filter cylinder (41) and a side wall wheel (62) for abutting against the outer wall of the filter cylinder (41). The upper cover unit (7) is lifted and positioned above the circulating conveyor chain (2). The upper cover unit (7) is used to hoist the filter end cover (42) and place the filter end cover (42) on the upper end of the filter cylinder (41). The number of the cylindrical supports (6) is several, and the several cylindrical supports (6) are distributed in a circle around the filter cylinder (41); The tube holder (6) includes: The bottom support arm (63) is rotatably mounted on the material support (5) and can swing up and down; A bottom support arm (64) is provided on the bottom support main arm (63), and the bottom support arm (64) and the bottom support main arm (63) are arranged at an angle. The bottom support wheel (61) is rotatably located at the end of the bottom support arm (64) away from the bottom support main arm (63). The filter end cap (42) has a lifting hole (43) for hoisting, and the upper cover unit (7) includes: The upper cover cross arm (71) is raised and lowered above the circulating conveyor chain (2); The lifting tube (72) is provided on the upper cover cross arm (71) in the vertical direction. The lifting tube (72) is used to pass through the lifting hole (43) to lift and place the filter end cap (42). The cover rod (73) is swung up and down on the cover tube (72), and the cover rod (73) is configured to swing upward and then abut against the lower surface of the filter end cover (42); The upper cover unit (7) also includes: The slide rod (74) is slidably disposed inside the cover tube (72); The cover connecting rod (75) is hinged at one end to the slide rod (74) and slidably hinged to the cover rod (73) at the other end; The cover support rod (75) is configured to push the cover support rod (73) to swing up and down under the up and down sliding drive of the slide rod (74); The upper cover unit (7) also includes: There are several pressure caps (76), and each pressure cap (76) is located on the outer wall of the cover tube (72) and above the cover support rod (73). The pressure caps (76) are distributed around the cover tube (72). The pressure caps (76) are configured to press against the upper end face of the filter end cap (42) under the downward movement of the cover tube (72).

2. The filter end cap and shell spot welding machine of claim 1, wherein, The tube holder (6) also includes: Side wall pressure seat (65) is provided on the bottom support main arm (63); The side wall pressure head (66) is slidably disposed on the side wall pressure seat (65), and the side wall wheel (62) is rotatably disposed on the side wall pressure head (66); The side wall abutting elastic element (67) acts on the side wall pressure seat (65) at one end and on the side wall pressure head (66) at the other end. The side wall abutting elastic element (67) is used to provide the force of the side wall pressure head (66) pressing against the peripheral wall of the filter cylinder (41).

3. The spot welding machine for filter end cap and cylinder according to claim 1 or 2, characterized in that, The tube holder (6) also includes: A limiting seat (68) is provided on the material support (5) and located below the hinge point between the bottom support main arm (63) and the material support (5). The limiting seat (68) is used to abut against the bottom support main arm (63) to limit the downward swing amplitude of the bottom support main arm (63).

4. The filter end cap and shell spot welding machine of claim 3, wherein, The tube holder (6) also includes: The reset elastic element (69) acts on the bottom support main arm (63) at one end and on the limit seat (68) at the other end. The reset elastic element (69) is used to provide the bottom support main arm (63) with an upward swinging force.

5. The filter end cap and shell spot welding machine of claim 1 wherein, The number of the cover support rod (73) and the cover support connecting rod (75) are both several, and the several cover support rods (73) are distributed circumferentially along the cover tube (72).

6. The filter end cap and shell spot welding machine of claim 5, wherein, The number of the hanging cover tubes (72) is several, and they are set one-to-one with the hanging holes (43). The several hanging cover tubes (72) are distributed around the filter end cap (42).

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