Filter bag inner frame pre-assembling machine

Abstract

The filter bag inner frame pre-assembling machine comprises a positioning and bag opening device, an overturning device, a portal frame and a material taking and clamping device which is installed on the portal frame and can move along the X axis, the Y axis and the Z axis, an opening of a filter bag is opened through the positioning and bag opening device, and the overturning device drives the filter bag to rotate so that the opening of the filter bag can face upwards. And the inner frame is clamped by the material taking and clamping device and is pressed on the inner side of the opening part of the filter bag. According to the device, automatic grabbing, automatic positioning, automatic opening, automatic overturning and the like of the filter bag can be achieved, automatic taking of the inner frame and automatic clamping and pressing fit of the inner frame and the opening of the filter bag can be achieved, therefore, pre-assembling of the filter bag and the inner frame can be achieved, manpower is reduced, the automation degree and efficiency of the process are improved, and the production efficiency is improved. And the automation degree of the whole filter assembly process is accelerated.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical devices, and particularly relates to a pre-assembly machine for the inner frame of a filter bag. Background Art

[0002] Bag filters are used in fresh air filtration systems or equipment. A bag filter is formed by assembling multiple (such as 6) filter bags side by side. The process is roughly as follows: one end of the filter bag has an opening. First, the outer peripheral surface of the inner frame is sprayed with glue, and then the glued inner frame is placed inside the opening of the filter bag and the two are pressed and clamped together (which can be called the composite clamping of the filter bag and the inner frame). Then, two adjacent filter bags (mainly the inner frames) are riveted together in sequence, and then a large outer frame is used to assemble the inner frames at the openings of multiple filter bags together. To automate the above process, it is necessary to automate each step. In the prior art, the process of placing the glued inner frame inside the opening of the filter bag and pressing and clamping the two together is generally carried out manually, which has problems such as low efficiency, low automation level, high labor cost, and unsatisfactory pressing effect. Summary of the Invention

[0003] The main technical problem to be solved by the present invention is to provide a pre-assembly machine for the inner frame of a filter bag. Each mechanism operates stably, and can realize the automatic grasping, automatic positioning, automatic stretching, and automatic flipping of the filter bag, etc., and can also realize the automatic material taking of the inner frame and the automatic clamping and pressing of the inner frame and the opening of the filter bag. Therefore, the pre-assembly of the filter bag and the inner frame can be realized, the labor is reduced, the automation level and efficiency of the above process are improved, and the pace of the automation of the entire filter assembly process is accelerated.

[0004] To solve the above technical problem, a technical solution adopted by the present invention is: providing a pre-assembly machine for the inner frame of a filter bag, the pre-assembly machine includes a positioning and bag opening device, a flipping device, a gantry, and a material taking and clamping device installed on the gantry and capable of moving along the XYZ three axes. The opening of the filter bag is opened by the positioning and bag opening device, the filter bag is driven to rotate by the flipping device so that its opening faces upward, and the inner frame is clamped by the material taking and clamping device and pressed inside the opening of the filter bag.

[0005] The positioning and bag opening device includes a pre-assembly machine table. A positioning platform, an upper bag opening mechanism, and a bag taking mechanism for grasping the filter bag and capable of translating along the X-axis and Z-axis are provided on the pre-assembly machine table. A plurality of positioning substrates, a lower bag opening mechanism, and a bag pushing mechanism are provided at the front end of the positioning platform.

[0006] The bag pushing mechanism includes a bag pushing plate and a bag pushing translation driving unit capable of driving the bag pushing plate to translate. The bag pushing plate is driven to translate along the X direction by the bag pushing translation driving unit.

[0007] The filter bag is grabbed to the positioning platform by the bag taking mechanism, and the pusher plate is pushed to translate by the pusher bag translation driving unit to cooperate with the positioning substrate to accurately position the filter bag; the upper layer of the filter bag is inserted and moved upward by the upper bag opening mechanism, and the lower layer of the filter bag is inserted and moved downward by the lower bag opening mechanism, so as to open the mouth of the filter bag.

[0008] The flipping device includes a flipping frame, two sets of bag supporting devices arranged on the flipping frame, a Y-direction bag supporting driving mechanism capable of driving the two bag supporting devices to approach or move away from each other in the Y direction, a flipping driving mechanism capable of driving the flipping frame to flip, and a flipping frame translation driving mechanism for driving the flipping frame to translate in the X direction. The mouth of the filter bag is kept in an open state by the two bag supporting devices, the flipping frame is driven to flip by the flipping driving mechanism to drive the filter bag to flip so that its mouth faces upward, and the flipping frame is driven to translate in the X direction by the flipping frame translation driving mechanism.

[0009] The material taking and clamping device includes a material taking base, two material taking bottom plates, a set of intermediate inner frame clamping mechanisms, two sets of side inner frame clamping mechanisms, an X-direction material taking and clamping translation driving mechanism, and a variable distance driving mechanism. The two material taking bottom plates are both installed on the bottom surface of the material taking base, and the two material taking bottom plates can approach or move away from each other in the X direction through the X-direction material taking and clamping translation driving mechanism.

[0010] The intermediate inner frame clamping mechanism is fixed at the middle position of the material taking bottom plate, and the two sets of side inner frame clamping mechanisms are mirror symmetric with the intermediate inner frame clamping mechanism as the center and are movably installed on the material taking bottom plate; the intermediate inner frame clamping mechanism and the two sets of side inner frame clamping mechanisms both include two inner frame support and clamping assemblies installed on the material taking bottom plate, and the two inner frame support and clamping assemblies of each side inner frame clamping mechanism are both installed on the same connecting plate at the same time; the two connecting plates can be driven to approach or move away from each other in the Y direction through the variable distance driving mechanism.

[0011] Each inner frame support and clamping assembly includes an inner side support plate and a long side outer clamping unit. The upper end of the long side outer clamping unit is installed on the upper part of the inner side support plate. The inner frame is supported from the inside to the outside by all the inner side support plates, and the long side of the inner frame and the mouth of the filter bag are pressed and clamped by the long side outer clamping unit.

[0012] Furthermore, a plurality of strip-shaped grooves extending along the X direction are formed in the positioning platform; the bag-pushing and translating driving unit includes a bag-pushing and translating driving motor, two third synchronous wheels, a fourth synchronous belt, and a bag-pushing seat. The third synchronous wheels are located at both ends of the bottom of the positioning platform. One of the third synchronous wheels is installed at the power output end of the bag-pushing and translating driving motor. The fourth synchronous belt is sleeved on the third synchronous wheels. The bag-pushing seat is fixed on the fourth synchronous belt. The upper end of the bag-pushing seat extends out of the strip-shaped groove and fixedly installs the bag-pushing plate.

[0013] Furthermore, the upper bag-opening mechanism includes an upper needle-type suction cup and an upper bag-opening driving linear module. The upper needle-type suction cup is installed at the power output end of the upper bag-opening driving linear module, and the upper needle-type suction cup is driven to lift and lower by the upper bag-opening driving linear module.

[0014] The lower bag-opening mechanism includes a lower needle-type suction cup and a lower bag-opening driving cylinder. The lower needle-type suction cup is installed at the power output end of the lower bag-opening driving cylinder, and the lower needle-type suction cup is driven to lift and lower by the lower bag-opening driving cylinder.

[0015] The bag-taking mechanism includes a connecting arm and a suction cup group composed of a plurality of needle-type suction cups. The suction cup group is installed at the lower end of the connecting arm.

[0016] Furthermore, the bag-supporting device includes an insertion plate, a fixed insertion piece, a movable insertion piece installed on the insertion plate, and an insertion-piece translating driving linear module capable of driving the movable insertion piece to lift and lower. The fixed insertion piece is fixed at one end of the insertion plate, and the movable insertion piece is driven to lift and lower by the insertion-piece translating driving linear module.

[0017] Furthermore, the Y-direction bag-supporting driving mechanism includes a Y-direction bag-supporting driving motor, a fourth synchronous wheel, and a fifth synchronous belt. The fourth synchronous wheels are located at both ends of the flipping frame. The fifth synchronous belt is sleeved on the fourth synchronous wheels, and the fourth synchronous wheels are driven to rotate by the Y-direction bag-supporting driving motor.

[0018] The insertion plates of the two bag-supporting devices are respectively fixed at different ends on different sides of the fifth synchronous belt.

[0019] Furthermore, a short-side outer clamping unit is arranged on the inner side surface of the inner support plate of the side bag-taking inner frame clamping mechanism. The short sides of the inner frame and the mouth part of the filter bag are pressed and clamped by the short-side outer clamping units on both sides.

[0020] The short-side outer clamping unit includes a short-side outer clamping driving cylinder and a vertical clamping plate. The vertical clamping plate is installed at the power output end of the short-side outer clamping driving cylinder.

[0021] Furthermore, the clamping unit on the outer side of the long side includes a clamping driving cylinder on the outer side of the long side, an inverted "T"-shaped clamping plate, and a pin shaft. The upper end of the "T"-shaped clamping plate is rotatably connected to one side of the bottom of the clamping driving cylinder on the outer side of the long side with a fulcrum. A cavity is provided at the middle position of the "T"-shaped clamping plate, and the pin shaft passes through the cavity and is rotatably connected to the end of the push rod of the clamping driving cylinder on the outer side of the long side;

[0022] By driving the push rod to retract or extend through the clamping driving cylinder on the outer side of the long side, the upper end of the "T"-shaped clamping plate will be driven to rotate around the above-mentioned fulcrum, and then the lower end of the "T"-shaped clamping plate will be driven to approach or move away from the inner support plate.

[0023] Furthermore, the variable pitch driving mechanism includes a variable pitch driving motor, a variable pitch lead screw, and two variable pitch nuts. The power output end of the variable pitch driving motor is connected to one end of the variable pitch lead screw. The variable pitch lead screw is a bidirectional lead screw with different thread directions. The two variable pitch nuts are respectively fixed on the two connecting plates, and the two variable pitch nuts are respectively sleeved on the left and right sections of the variable pitch lead screw; A slider-rail structure is also connected between the material taking bottom plate and the material taking base.

[0024] Furthermore, the X-direction material taking clamping and translation driving mechanism includes an X-direction material taking clamping and translation driving motor, an X-direction lead screw, and two X-direction nuts. The power output end of the X-direction material taking clamping and translation driving motor is connected to one end of the X-direction lead screw. The X-direction lead screw is a bidirectional lead screw with different thread directions. The two X-direction nuts are respectively fixed on the two material taking bottom plates, and the two X-direction nuts are respectively sleeved on the front and back sections of the X-direction lead screw; A slider-rail structure is also connected between the material taking bottom plate and the material taking base.

[0025] Furthermore, the gantry includes two X-direction cross beams, a Y-direction cross beam, and a Z-direction beam. The two ends of the Y-direction cross beam are slidably connected to the X-direction cross beams, and the Z-direction beam can slide in the Y direction along the surface of the Y-direction cross beam;

[0026] The Z-direction inner frame translation driving mechanism capable of driving the material taking clamping device to translate in the Z direction includes a Z-direction inner frame translation driving motor, a driving wheel, an upper idler wheel, a lower idler wheel, and a belt. The driving wheel is located above the upper idler wheel, and the upper idler wheel is located above the lower idler wheel. The upper end of the belt is fixed to the upper end of the Z-direction beam. At the same time, the belt bypasses from below the upper idler wheel to the outer periphery of the driving wheel and then bypasses from above the lower idler wheel. Finally, the lower end of the belt is fixed to the lower end of the Z-direction beam.

[0027] The beneficial effects of the present invention are:

[0028] Each mechanism of the present invention operates stably, and can achieve automatic grasping, automatic positioning, automatic opening, and automatic flipping of the filter bag, etc., and can also achieve automatic material taking of the inner frame and automatic clamping and pressing of the mouth of the inner frame and the filter bag. Therefore, it can realize the pre-assembly of the filter bag and the inner frame, reduce manual labor, improve the automation degree and efficiency of the above process, and accelerate the pace of the automation degree of the entire filter assembly process. Thus, it has at least the following advantages:

[0029] First, in the positioning and bag-opening device of the present invention, the filter bag is grasped by the bag-taking mechanism to the positioning platform, and the push-bag plate is driven to translate by the push-bag translation driving unit to cooperate with the positioning substrate to accurately position the filter bag; the upper layer of the filter bag is inserted and moved upward by the upper bag-opening mechanism, and the lower layer of the filter bag is inserted and moved downward by the lower bag-opening mechanism to open the mouth of the filter bag. Therefore, the structure of the positioning and bag-opening device of the present invention is ingeniously designed, can realize automatic grasping, automatic positioning, and automatic opening of the filter bag, etc., has a high degree of automation, high efficiency, and can ensure the consistency of the opening degree of the filter bag mouth, facilitating the smooth progress of the subsequent assembly process with the inner frame.

[0030] Second, the material taking and clamping device of the present invention includes an intermediate inner frame clamping mechanism, two groups of side inner frame clamping mechanisms, an X-direction material taking and clamping translation driving mechanism, and a variable distance driving mechanism. The X-direction material taking and clamping translation driving mechanism can drive the two inner frame support clamping components of the intermediate inner frame clamping mechanism and the two groups of side inner frame clamping mechanisms to approach and move away from each other. Therefore, it can hold the inner frame to realize the material taking of the inner frame, and then the long side of the inner frame and the mouth of the filter bag are pressed and clamped together by the long side outer clamping unit. At the same time, the short side of the inner frame and the mouth of the filter bag are pressed and clamped by the short side outer clamping unit, and the pre-assembly (or composite clamping) of the mouth of the filter bag and the inner frame after coating with glue can be realized. After that, the inner frames at the mouths of adjacent filter bags are riveted together through the downstream process. Therefore, the material taking and clamping device of the present invention adopts an automated operation mode to realize the lifting of the inner frame, the pre-assembly of the inner frame and the filter bag mouth, etc., which is convenient for the subsequent operation process, saves a large amount of labor, and selects various mechanisms with stable performance in the mechanism to ensure quality while reducing costs.

[0031] Furthermore, the material taking and clamping device of the present invention drives the side inner frame clamping mechanism to translate along the Y direction through the variable distance driving mechanism to adjust the distance between it and the intermediate inner frame clamping mechanism, and can realize the assembly of inner frames of different sizes and specifications with the filter bag, improving the versatility of the present composite clamping device;

[0032] Moreover, the appearance of this filter bag inner frame pre-assembly machine makes it possible to realize the full-automatic assembly of the filter, accelerating the pace of realizing the full-automatic assembly of the filter; in addition, the present invention also has the characteristics of simple structure, high speed, and stable quality.

[0033] The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is one of the structural schematic diagrams of the present invention (viewed from one angle);

[0035] Figure 2 is the second structural schematic diagram of the present invention (viewed from another angle);

[0036] Figure 3 is one of the structural schematic diagrams of the positioning and bag-opening device of the present invention (viewed from one angle);

[0037] Figure 4 is the second structural schematic diagram of the positioning and bag-opening device of the present invention (viewed from another angle);

[0038] Figure 5 is one of the structural schematic diagrams of the positioning platform of the present invention (viewed from one angle);

[0039] Figure 6 is the second structural schematic diagram of the positioning platform of the present invention (viewed from another angle);

[0040] Figure 7 is the structural schematic diagram of the bag-pushing mechanism of the present invention;

[0041] Figure 8 is one of the structural schematic diagrams of the flipping device of the present invention (viewed from one angle);

[0042] Figure 9 is the second structural schematic diagram of the flipping device of the present invention (viewed from another angle);

[0043] Figure 10 is the structural schematic diagram of the gantry and the material-taking and clamping device of the present invention;

[0044] Figure 11 is the structural schematic diagram of the Z-direction beam and the material-taking and clamping device of the present invention;

[0045] Figure 12 is one of the structural schematic diagrams of the material-taking and clamping device of the present invention;

[0046] Figure 13 is the second structural schematic diagram of the material-taking and clamping device of the present invention (the material-taking base is not installed for clearly seeing the internal structure);

[0047] Figure 14 is the side view of the material-taking and clamping device of the present invention;

[0048] Figure 15 It is a schematic structural diagram of the short-side outer clamping unit of the present invention;

[0049] Figure 16 It is a schematic structural diagram at the gantry of the present invention;

[0050] Figure 17 It is a schematic structural diagram at the Y-direction cross beam of the present invention;

[0051] Figure 18 It is one of the schematic structural diagrams at the Z-direction beam of the present invention (viewed from one angle);

[0052] Figure 19 It is the second schematic structural diagram at the Z-direction beam of the present invention (viewed from another angle);

[0053] The marks of each part in the attached drawings are as follows:

[0054] Filter bag 1001;

[0055] Gantry 1, X-direction cross beam 11, Y-direction cross beam 12, Z-direction beam 13, X-direction inner frame translation driving mechanism 14, X-direction inner frame translation driving motor 141, driving shaft 142, first synchronous pulley 143, first synchronous belt 144, second synchronous belt 145, Y-direction inner frame translation driving mechanism 15, Y-direction inner frame translation driving motor 151, second synchronous pulley 152, third synchronous belt 153, Z-direction inner frame translation driving mechanism 16, Z-direction inner frame translation driving motor 161, driving wheel 162, upper idler pulley 163, lower idler pulley 164, belt 165, mounting seat 166;

[0056] Material taking and clamping device 2, material taking base 21, material taking bottom plate 22, intermediate inner frame clamping mechanism 23, inner frame support clamping assembly 231, inner side support plate 2311, step 23111, long-side outer clamping unit 2312, long-side outer clamping driving cylinder 23121, "T" type clamping plate 23122, pin shaft 23123, fulcrum 23124, cavity 23125, side inner frame clamping mechanism 24, connecting plate 241, X-direction waist-shaped hole 2411, guiding pin 2412, X-direction material taking and clamping translation driving mechanism 25, X-direction material taking and clamping translation driving motor 251, X-direction lead screw 252, X-direction nut 253, variable pitch driving mechanism 26, variable pitch driving motor 261, variable pitch lead screw 262, variable pitch nut 263, short-side outer clamping unit 27, short-side outer clamping driving cylinder 271, vertical clamping plate 272

[0057] Positioning and bag-opening device 3, pre-assembly machine platform 31, positioning platform 32, positioning substrate 321, strip groove 322, upper bag-opening mechanism 33, upper needle-type suction cup 331, upper bag-opening driving linear module 332, bag-taking mechanism 34, connecting arm 341, suction cup group 342, lower bag-opening mechanism 35, lower needle-type suction cup 351, lower bag-opening driving cylinder 352, bag-pushing mechanism 36, bag-pushing plate 361, bag-pushing translation driving unit 362, bag-pushing translation driving motor 3621, third synchronous pulley 3622, fourth synchronous belt 3623, bag-pushing seat 3624, X-direction bag-taking translation driving mechanism 37, Z-direction bag-taking translation driving mechanism 38;

[0058] Turning device 4, turning frame 41, Y-direction bag-supporting driving mechanism 42, Y-direction bag-supporting driving motor 421, fourth synchronous pulley 422, fifth synchronous belt 423, turning driving mechanism 43, turning frame translation driving mechanism 44, first bag-supporting device 45, inserting plate 451, fixed inserting piece 452, moving inserting piece 453, inserting plate translation driving linear module 454, second bag-supporting device 46;

[0059] Filter bag feeding device 5. Specific implementation mode

[0060] The following uses specific specific embodiments to illustrate the specific implementation mode of the present invention. Those skilled in the art can easily understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented in other different ways, that is, without departing from the scope disclosed by the present invention, different modifications and changes can be made.

[0061] The descriptions of positions such as up, down, left, and right in this embodiment are based on the orientation in the drawings and have no special meaning, nor are they used to limit the protection scope of the present invention.

[0062] Embodiment: A filter bag inner frame pre-assembly machine, as Figure 1 and Figure 2 shown, the pre-assembly machine includes a positioning and bag-opening device 3, a turning device 4, a gantry 1, and a material-taking and clamping device 2 installed on the gantry 1 and capable of moving along the XYZ three axes. The mouth of the filter bag is opened by the positioning and bag-opening device, the filter bag is driven to rotate by the turning device so that its mouth faces upward, and the inner frame is clamped by the material-taking and clamping device and pressed against the inner side of the mouth of the filter bag.

[0063] As Figures 3 to 7 shown, the positioning and bag-opening device 3 includes a pre-assembly machine platform 31. The pre-assembly machine platform is provided with a positioning platform 32, an upper bag-opening mechanism 33, and a bag-taking mechanism 34 for grasping the filter bag 1001 and capable of translating along the X axis and the Z axis. The front end of the positioning platform is provided with a plurality of positioning substrates 321, a lower bag-opening mechanism 35, and a bag-pushing mechanism 36;

[0064] The bag pushing mechanism 36 includes a bag pushing plate 361 and a bag pushing translation driving unit 362 capable of driving the bag pushing plate 361 to translate. The bag pushing plate is driven to translate along the X direction by the bag pushing translation driving unit 362;

[0065] The filter bag is fed by the filter bag feeding device 5. The bag taking mechanism 34 grabs the filter bag from the filter bag feeding device 5 to the positioning platform 32. The bag pushing translation driving unit 362 drives the bag pushing plate 361 to translate and cooperate with the positioning substrate 321 to accurately position the filter bag. The upper layer of the filter bag 1001 is inserted and moved upward by the upper bag opening mechanism 33, and the lower layer of the filter bag is inserted and moved downward by the lower bag opening mechanism 35 to open the mouth of the filter bag;

[0066] As Figures 3 to 7 shown, the positioning and bag opening device 3 includes a pre-assembly machine table 31. The pre-assembly machine table is provided with a positioning platform 32, an upper bag opening mechanism 33, and a bag taking mechanism 34 for grabbing the filter bag 1001 and capable of translating along the X-axis and Z-axis. A plurality of positioning substrates 321, a lower bag opening mechanism 35, and a bag pushing mechanism 36 are provided at the front end of the positioning platform;

[0067] The positioning platform 32 is provided with a plurality of strip-shaped grooves 322 extending along the X direction. The bag pushing mechanism 36 includes a bag pushing plate 361 and a bag pushing translation driving unit 362 capable of driving the bag pushing plate 361 to translate. The bag pushing plate is driven to translate along the X direction by the bag pushing translation driving unit 362;

[0068] The bag taking mechanism 34 grabs the filter bag to the positioning platform 32. The bag pushing translation driving unit 362 drives the bag pushing plate 361 to translate and cooperate with the positioning substrate 321 to accurately position the filter bag. The upper layer of the filter bag 1001 is inserted and moved upward by the upper bag opening mechanism 33, and the lower layer of the filter bag is inserted and moved downward by the lower bag opening mechanism 35 to open the mouth of the filter bag.

[0069] In this embodiment, as Figures 3 to 7 shown, the bag pushing translation driving unit 362 includes a bag pushing translation driving motor 3621, two third synchronous wheels 3622, a fourth synchronous belt 3623, and a bag pushing seat 3624. The third synchronous wheels are located at both ends of the bottom of the positioning platform. One of the third synchronous wheels is installed on the power output end of the bag pushing translation driving motor. The fourth synchronous belt is sleeved on the third synchronous wheels. The bag pushing seat is fixed on the fourth synchronous belt. The upper end of the bag pushing seat extends out from the strip-shaped groove and fixedly installs the bag pushing plate.

[0070] In this embodiment, as Figure 3 and Figure 4As shown, the upper bag opening mechanism 33 includes an upper needle-type suction cup 331 and an upper bag opening driving linear module 332. The upper needle-type suction cup is installed at the power output end of the upper bag opening driving linear module, and the upper needle-type suction cup is driven to move up and down by the upper bag opening driving linear module. The needle-type suction cup is a kind of modern suction cup technology, mainly using thin needle-shaped rigid rods as the suction area of the suction cup. At the same time, the needle-type suction cup has the characteristics of large suction force, firm adsorption, and simple structure. The working principle of the needle-type suction cup is mainly to form negative pressure inside the suction cup to achieve the adsorption function. This is the prior art, so it will not be elaborated here.

[0071] In this embodiment, as Figure 3 and Figure 4 shown, the lower bag opening mechanism 35 includes a lower needle-type suction cup 351 and a lower bag opening driving cylinder 352. The lower needle-type suction cup is installed at the power output end of the lower bag opening driving cylinder, and the lower needle-type suction cup is driven to move up and down by the lower bag opening driving cylinder.

[0072] In this embodiment, as Figure 3 and Figure 4 shown, the bag taking mechanism 34 includes a connecting arm 341 and a suction cup group 342 composed of multiple needle-type suction cups. The suction cup group is installed at the lower end of the connecting arm.

[0073] In this embodiment, as Figure 3 and Figure 4 shown, the X-direction bag taking translation driving mechanism 37 that can drive the bag taking mechanism 34 to translate along the X-axis is a linear module. It is only necessary to be able to drive the bag taking mechanism to move up and down stably.

[0074] In this embodiment, the Z-direction bag taking translation driving mechanism 38 that can drive the bag taking mechanism 34 to translate along the Z-axis and the subsequent Z-direction inner frame taking translation driving mechanism 16 (as Figure 18 and Figure 19 shown) have similar mechanisms and working principles. For details, see the following description. Of course, other structures of the Z-direction bag taking translation driving mechanism can also be used as long as it can achieve the function of driving the connecting arm to move up and down. However, compared with the motor-driven screw nut structure, the Z-direction bag taking translation driving mechanism in this embodiment has a longer driving stroke and the mechanism runs smoothly, which can meet the requirements.

[0075] As Figure 1 、 Figure 2 、 Figure 8 and Figure 9As shown in the figure, the flipping device 4 includes a flipping frame 41, two bag-supporting devices provided on the flipping frame, a Y-direction bag-supporting driving mechanism 42 capable of driving the two bag-supporting devices to approach or move away from each other in the Y direction, a flipping driving mechanism 43 capable of driving the flipping frame to flip, and a flipping-frame translation driving mechanism 44 for driving the flipping frame to translate in the X direction. With the two bag-supporting devices, the mouth of the filter bag is kept in an open state. The flipping driving mechanism drives the flipping frame to flip, driving the filter bag to flip so that its mouth faces upward. The flipping-frame translation driving mechanism drives the flipping frame to translate in the X direction;

[0076] As Figure 8 and Figure 9 shown in the figure, the bag-supporting device includes a plug board 451, a fixed insert piece 452, a movable insert piece 453 mounted on the plug board, and an insert-piece translation driving linear module 454 capable of driving the movable insert piece to move up and down. The fixed insert piece is fixed at one end of the plug board. The insert-piece translation driving linear module drives the movable insert piece to move up and down. There are many driving methods for the insert-piece translation driving linear module, as long as it can drive the movable insert piece to move up and down, and the structure is not limited. It belongs to the prior art, so it will not be elaborated here. In this embodiment, both the fixed insert piece and the movable insert piece are L-shaped insert pieces, and the acting surface of the L-shaped insert piece is a serrated surface with saw teeth. This increases friction and is convenient for better keeping the mouth of the filter bag in an open state.

[0077] As Figure 8 and Figure 9 shown in the figure, the Y-direction bag-supporting driving mechanism 42 includes a Y-direction bag-supporting driving motor 421, a fourth synchronous pulley 422, and a fifth synchronous belt 423. The fourth synchronous pulley is located at both ends of the flipping frame, and the fifth synchronous belt is sleeved on the fourth synchronous pulley. The fourth synchronous pulley is driven to rotate by the Y-direction bag-supporting driving motor;

[0078] As Figure 8 and Figure 9 shown in the figure, the plug boards of the two bag-supporting devices are respectively fixed at different ends on different sides of the fifth synchronous belt. Define the two bag-supporting devices as the first bag-supporting device 45 and the second bag-supporting device 46. Different ends on different sides specifically mean that the plug board of the first bag-supporting device is fixed at the left end on the outer side of the synchronous belt, and the plug board of the second bag-supporting device is fixed at the right end on the inner side of the synchronous belt. When the Y-direction bag-supporting driving motor drives the fourth synchronous pulley to rotate and drives the fifth synchronous belt to move back and forth, the two bag-supporting devices will be driven to approach or move away from each other simultaneously.

[0079] In this embodiment, the flipping driving mechanism is a structure of a motor combined with a reducer. This is the prior art, so it will not be elaborated here. However, it is not limited to this, as long as it can drive the flipping frame to flip by 90°.

[0080] In this embodiment, the translation frame translation drive mechanism 44 is a drive motor cooperating with a synchronous pulley and synchronous belt structure. This is a prior art, so it will not be elaborated here. However, it is not limited to this, as long as it can drive the translation frame to translate in the X direction.

[0081] As Figures 10 to 19 shown, the material taking and clamping device 2 includes a material taking base 21, two material taking bottom plates 22, a set of intermediate inner frame clamping mechanisms 23, two sets of side inner frame clamping mechanisms 24, an X-direction material taking and clamping translation drive mechanism 25, and a variable distance drive mechanism 26. The two material taking bottom plates 22 are both installed on the bottom surface of the material taking base 21, and the two material taking bottom plates 22 can be moved closer to or away from each other in the X direction through the X-direction material taking and clamping translation drive mechanism 25;

[0082] The intermediate inner frame clamping mechanism 23 is fixed at the middle position of the material taking bottom plate 22. The two sets of side inner frame clamping mechanisms 24 are mirror symmetric with the intermediate inner frame clamping mechanism 23 as the center and are movably installed on the material taking bottom plate 22. The intermediate inner frame clamping mechanism 23 and the two sets of side inner frame clamping mechanisms 24 both include two inner frame support and clamping assemblies 231 installed on the material taking bottom plate. The two inner frame support and clamping assemblies 231 of each side inner frame clamping mechanism 24 are both installed on the same connecting plate 241 at the same time. The two connecting plates 241 can be driven to move closer to or away from each other in the Y direction through the variable distance drive mechanism 26;

[0083] Each inner frame support and clamping assembly 231 includes an inner side support plate 2311 and a long side outer clamping unit 2312. The upper end of the long side outer clamping unit 2312 is installed on the upper part of the inner side support plate 2311. The inner frame is supported from the inside out by all the inner side support plates 2311, and the long side of the inner frame and the mouth of the filter bag are pressed and clamped by the long side outer clamping unit 2312.

[0084] In this embodiment, as Figures 10 to 19 shown, the material taking and clamping device 2 includes a material taking base 21, two material taking bottom plates 22, a set of intermediate inner frame clamping mechanisms 23, two sets of side inner frame clamping mechanisms 24, an X-direction material taking and clamping translation drive mechanism 25, and a variable distance drive mechanism 26. The two material taking bottom plates 22 are both installed on the bottom surface of the material taking base 21, and the two material taking bottom plates 22 can be moved closer to or away from each other in the X direction through the X-direction material taking and clamping translation drive mechanism 25;

[0085] The middle inner frame clamping mechanism 23 is fixed at the middle position of the material taking bottom plate 22. Two groups of the side inner frame clamping mechanisms 24 are mirror symmetric with the middle inner frame clamping mechanism 23 as the center and are movably installed on the material taking bottom plate 22. The middle inner frame clamping mechanism 23 and the two groups of the side inner frame clamping mechanisms 24 both include two inner frame support clamping assemblies 231 installed on the material taking bottom plate. The two inner frame support clamping assemblies 231 of each side inner frame clamping mechanism 24 are both installed on the same connecting plate 241 at the same time. The two connecting plates 241 can be driven to approach or move away from each other in the Y direction by the variable pitch driving mechanism 26.

[0086] Each inner frame support clamping assembly 231 includes an inner side support plate 2311 and a long side outer clamping unit 2312. The upper end of the long side outer clamping unit 2312 is installed on the upper part of the inner side support plate 2311. The inner frame is supported by all the inner side support plates 2311 from the inside to the outside, and the long side of the inner frame and the mouth part of the filter bag are pressed and clamped by the long side outer clamping unit 2312. In this embodiment, the upper end of the inner side support plate of the middle inner frame clamping mechanism is fixed to the material taking bottom plate, and the upper end of the inner side support plate of the side inner frame clamping mechanism is slidably connected to the material taking bottom plate through a slider rail structure.

[0087] In this embodiment, as Figure 12 shown, the outer side surface of the inner side support plate 2311 is provided with a step 23111 for easily hooking the inner frame.

[0088] The two material taking bottom plates are simultaneously driven to move away from each other in the X direction by the X-direction material taking clamping translation driving mechanism 25, driving all the inner side support plates to expand outwards to support the inner frame. The inner frame can be easily hooked by the above-mentioned step 23111 to prevent it from falling due to slight shaking or other reasons during the movement.

[0089] In this embodiment, as Figures 11 to 14 shown, the long side outer clamping unit 2312 includes a long side outer clamping driving cylinder 23121, an inverted "T" - shaped clamping plate 23122, and a pin shaft 23123. The upper end of the "T" - shaped clamping plate is rotatably connected with one side of the bottom of the long side outer clamping driving cylinder as a fulcrum 23124. A cavity 23125 is provided at the middle position of the "T" - shaped clamping plate. The pin shaft 23123 passes through the cavity 23125 and is rotatably connected with the end of the push rod of the long side outer clamping driving cylinder 23121.

[0090] By driving the push rod of the long side outer clamping driving cylinder 23121 to retract or extend, the upper end of the "T" - shaped clamping plate 23122 will be driven to rotate around the above - mentioned fulcrum, and then the lower end of the "T" - shaped clamping plate 23122 will be driven to approach or move away from the inner side support plate 2311.

[0091] The long-side outer clamping unit structure in this embodiment is ingeniously designed. Firstly, an inverted "T" - shaped clamping plate is used in cooperation with the inner support plate to increase the contact area between the "T" - shaped clamping plate and the mouth of the filter bag, enhancing the pressing and bonding effect. Secondly, each set of inner frame support and clamping components can be driven by a single long - side outer clamping drive cylinder to rotate the "T" - shaped clamping plate around a fulcrum and cooperate with the inner support plate to press and bond the long side of the inner frame and the mouth of the filter bag. The structure is concise, compact, occupies little space, and has a good pressing effect.

[0092] In this embodiment, as Figures 11 to 14 shown, on the inner side surface of the inner support plate of the side - taking inner frame clamping mechanism 24, there is a short - side outer clamping unit 27. The short sides of the inner frame and the mouth of the filter bag are pressed and clamped by the two short - side outer clamping units 27 on both sides. In this embodiment, as Figure 15 shown, the short - side outer clamping unit 27 includes a short - side outer clamping drive cylinder 271 and a vertical clamping plate 272. The vertical clamping plate 272 is installed at the power output end of the short - side outer clamping drive cylinder 271. A protective pad, such as a plastic material with certain elasticity, can be installed on the inner side of the vertical clamping plate to avoid damaging the inner frame and the filter bag.

[0093] Since the inner frame itself has rigidity, the short - side outer clamping drive cylinder can drive the vertical plate to exert force inward, pushing the mouth of the filter bag against the short side surface of the inner frame and bonding the two together.

[0094] In this embodiment, as Figures 11 to 14 shown, the variable - distance drive mechanism 26 includes a variable - distance drive motor 261, a variable - distance lead screw 262, and two variable - distance nuts 263. The power output end of the variable - distance drive motor 261 is connected to one end of the variable - distance lead screw 262. The variable - distance lead screw 262 is a bidirectional lead screw with different - handed threads. The two variable - distance nuts 263 are respectively fixed on the two connecting plates 241, and the two variable - distance nuts 263 are respectively sleeved on the left and right sections of the variable - distance lead screw 262. There is also a slider - rail structure connecting the material - taking bottom plate 22 and the material - taking base 21. By driving the variable - distance lead screw to rotate by the variable - distance drive motor, the two variable - distance nuts are driven to approach or move away from each other, thereby realizing the approach or separation of the two connecting plates and the two sets of side - taking inner frame clamping mechanisms to achieve variable distance. By using a single variable - distance drive motor in cooperation with a variable - distance lead screw, the distance between the two side - taking inner frame clamping mechanisms and the middle - taking inner frame clamping mechanism can be adjusted. Coupled with the fact that the X - direction material - taking and clamping translation drive mechanism itself is a structure of a motor in cooperation with a lead screw, this composite clamping device can adapt to the pressing and bonding of inner frames and the mouths of filter bags with different size specifications, improving versatility.

[0095] In this embodiment, the connecting plate 241 is provided with an X-direction waist-shaped hole 2411. One end of the guiding pin 2412 is fixed to the end of the inner support plate 2311 of the side-taking inner frame clamping mechanism 24, and the other side passes through the X-direction waist-shaped hole 2411 and can translate along the X-direction waist-shaped hole 2411. Through the above structural design, the side-taking inner frame clamping mechanisms on both sides can not only change the distance along the Y direction, but also translate along the X direction to support the inner frame, and there is no interference between the mechanisms.

[0096] In this embodiment, as Figures 11 to 14 shown, the X-direction material-taking clamping translation driving mechanism 25 includes an X-direction material-taking clamping translation driving motor 251, an X-direction lead screw 252 and two X-direction nuts 253. The power output end of the X-direction material-taking clamping translation driving motor 251 is connected to one end of the X-direction lead screw 252. The X-direction lead screw 252 is a bidirectional lead screw with different thread directions. The two X-direction nuts 253 are respectively fixed on the two material-taking bottom plates 22, and the two X-direction nuts 253 are respectively sleeved on the front and rear sections of the X-direction lead screw 252; the material-taking bottom plate 22 and the material-taking base 21 are also connected by a slider-rail structure. By driving the X-direction lead screw 252 to rotate through the X-direction material-taking clamping translation driving motor 251, the two X-direction nuts 253 thereon and the material-taking bottom plate 22 are driven to approach or move away along the X direction.

[0097] In this embodiment, as Figure 10 shown, the gantry 1 includes two X-direction cross beams 11, a Y-direction cross beam 12 and a Z-direction beam 13. The two ends of the Y-direction cross beam 12 are slidably connected to the X-direction cross beams 11, and the Z-direction beam 13 can slide in the Y direction along the surface of the Y-direction cross beam;

[0098] As Figure 16 shown, the X-direction inner frame translation driving mechanism 14 capable of driving the material-taking clamping device to translate in the X direction includes an X-direction inner frame area translation driving motor 141, a driving shaft 142, a first synchronous pulley 143, a first synchronous belt 144 and a second synchronous belt 145. The power output end of the X-direction inner frame area translation driving motor 141, the middle position of the driving shaft 142, both ends of the driving shaft 142 and the X-direction cross beam 11 are all provided with the first synchronous pulley 143. The first synchronous belt 143 is sleeved on the first synchronous pulley 143 at the power output end of the X-direction inner frame area translation driving motor 141 and the first synchronous pulley 143 at the middle position of the driving shaft 142. The second synchronous belt 145 is sleeved on the first synchronous pulley 143 of the same X-direction cross beam 11;

[0099] The two ends of the Y-direction cross beam 12 are respectively fixed on the two second synchronous belts 145 and are slidably connected to the X-direction cross beam 11 through a slider-rail structure.

[0100] Through the transmission structure composed of the above drive shaft, multiple first synchronous pulleys, the first synchronous belt and the second synchronous belt, driven by an X-direction inner frame translation drive motor to drive the transmission of the above transmission structure and cooperating with the slider rail structure, the stable movement of the two X-direction cross beams can be finally realized, saving power resources.

[0101] In this embodiment, as Figure 17 shown, the Y-direction inner frame translation drive mechanism 15 capable of driving the material taking and clamping device 2 to translate in the Y-direction includes a Y-direction inner frame translation drive motor 151, a second synchronous pulley 152 and a third synchronous belt 153. The second synchronous pulley 152 is installed at the power output end of the Y-direction inner frame translation drive motor 151 and one end of the Y-direction cross beam 12. The third synchronous belt 153 is sleeved on the second synchronous pulley 152. The Z-direction beam 13 is fixed to the third synchronous belt 153 and is slidably connected to the Y-direction cross beam 12 through a slider rail structure.

[0102] In this embodiment, as Figure 18 and Figure 19 shown, the Z-direction inner frame translation drive mechanism 16 capable of driving the material taking and clamping device 2 to translate in the Z-direction includes a Z-direction inner frame translation drive motor 161, a driving wheel 162, an upper idler wheel 163, a lower idler wheel 164 and a belt 165. The driving wheel is located above the upper idler wheel, and the upper idler wheel is located above the lower idler wheel. The upper end of the belt is fixed to the upper end of the Z-direction beam. At the same time, the belt winds around the outer circumference of the driving wheel from below the upper idler wheel and then passes around above the lower idler wheel. Finally, the lower end of the belt is fixed to the lower end of the Z-direction beam. The Z-direction beam is slidably connected to the mounting seat 166 where the Z-direction inner frame translation drive motor is located through a slider rail structure. In this embodiment, the slide rail extends in the Z-direction and is arranged on the surface of the Z-direction beam, and the slider is fixed on the surface of the mounting seat. As Figure 18 shown, when the Z-direction inner frame translation drive motor drives the driving wheel to rotate counterclockwise, it will drive the Z-direction beam to rise. On the contrary, when the Z-direction inner frame translation drive motor drives the driving wheel to rotate clockwise, it will drive the Z-direction beam to descend. Of course, other structures of the Z-direction inner frame translation drive mechanism can also be adopted as long as it can realize the function of driving the Z-direction beam to rise and fall. However, compared with the motor-driven screw nut structure, the Z-direction inner frame translation drive mechanism in this embodiment has a longer driving stroke and the mechanism runs smoothly, which can meet the requirements.

[0103] In this embodiment, a clamping method using the above-mentioned filter bag inner frame composite clamping device. First, the material taking and clamping device moves to the position where the inner frame is located along the XYZ three axes. The X-direction material taking and clamping translation drive mechanism drives the two material taking bottom plates to move away from each other, so that all the inner support plates expand outward to support the inner frame from the inside and move it to the pre-assembly station. At this time, the inner frame is exactly located inside the mouth of the filter bag.

[0104] Then, the long-side outer clamping drive cylinder of the long-side outer clamping unit drives the "T" - shaped clamping plate to press and bond the two long sides of the inner frame and the mouth of the filter bag together, and the short-side outer clamping unit presses and bonds the two short sides of the inner frame and the mouth of the filter bag together;

[0105] Finally, the material taking and clamping device moves back along the XYZ three axes and returns to its original position, and the next process can be repeated.

[0106] The detailed working principle and process are as follows:

[0107] The working process of the positioning and bag opening device: The filter bags are stacked in the feeding area of the filter bag feeding device. The bag taking mechanism moves along the X - axis to the feeding area of the filter bags, then descends along the Z - axis until the suction cup group inserts and takes the topmost filter bag and places it on the positioning platform. Then, the bag pushing and translation drive unit 362 drives the bag pushing plate to translate along the X - direction to push the filter bag and accurately position it with the positioning substrate as the reference. After that, the upper bag opening drive linear module drives the upper needle - type suction cup to descend until it inserts and takes the upper layer of the filter bag, and at the same time, the lower bag opening drive cylinder drives the lower needle - type suction cup to rise to insert and take the lower layer of the filter bag. Then, the upper bag opening drive linear module drives the upper needle - type suction cup to move upward, and the lower bag opening drive cylinder drives the lower needle - type suction cup to move downward, thus opening the mouth of the filter bag. In order to ensure the opening effect of the filter bag, multiple groups of the upper bag opening mechanism 33 and the lower bag opening mechanism can be arranged at intervals.

[0108] The working process of the flipping device: The flipping frame translation drive mechanism 44 drives the flipping frame 41 to translate along the X - direction to a specified position, so that both the fixed insert piece 452 and the movable insert piece 453 are inserted into the opened filter bag. Then, the insert piece translation drive linear module 454 drives the movable insert piece 453 to move along the Z - direction and the Y - direction bag stretching drive mechanism 42 drives the first bag stretching device 45 and the second bag stretching device 46 to separate to open the mouth of the filter bag. After that, the upper bag opening drive linear module drives the upper needle - type suction cup to move upward, and the lower bag opening drive linear module drives the lower needle - type suction cup to move downward. Then, the flipping frame translation drive mechanism 44 drives the flipping frame 41 to translate backward along the X - direction and drives the flipping frame 41 to flip 90° through the flipping drive mechanism 43, so that the mouth of the filter bag faces upward, and the station where the filter bag is located at this time is the pre - assembly station. Among them, since the distance between the fixed insert piece and the movable insert piece can be adjusted and the distance between the first bag stretching device 45 and the second bag stretching device 46 can also be adjusted, therefore, it can be applied to the flipping of filter bags of different specifications, improving the versatility of the equipment;

[0109] Working process of the material taking and clamping device: The material taking and clamping device moves to the location where the inner frame (a rectangular frame with glue applied to the four outer side surfaces of one week) is located (not shown in the figure). The X-direction material taking and clamping translation driving mechanism drives the two material taking bottom plates away from each other, so that all the inner support plates expand outward to support the inner frame from the inside and move it to the pre-assembly station. And the inner frame is exactly located inside the mouth of the filter bag. Then, the "T" - shaped clamping plates of the long - side outer clamping unit press and bond the long side of the inner frame and the mouth of the filter bag together, and the vertical clamping plates of the short - side outer clamping unit press and bond the short side of the inner frame and the mouth of the filter bag together. The pre - assembled filter bag (including the inner frame) enters the subsequent processing process. The translations of the material taking and clamping device along the XYZ axes in the above process are respectively realized by the X - direction inner - frame taking translation driving mechanism, the Y - direction inner - frame taking translation driving mechanism, and the Z - direction inner - frame taking translation driving mechanism.

[0110] The above are only embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structures made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are similarly included in the patent protection scope of the present invention.

Claims

1. A pre-assembly machine for the inner frame of a filter bag, characterized in that: The pre-assembly machine includes a positioning and bag-opening device (3), a flipping device (4), a gantry (1), and a material-taking and clamping device (2) installed on the gantry (1) and capable of moving along the X, Y, and Z axes. The mouth of the filter bag is opened by the positioning and bag-opening device, the filter bag is rotated by the flipping device so that its mouth faces upward, and the inner frame is clamped by the material-taking and clamping device and pressed against the inner side of the mouth of the filter bag. The positioning and bag-opening device (3) includes a pre-assembly machine table (31). A positioning platform (32), an upper bag-opening mechanism (33), and a bag-taking mechanism (34) for grasping the filter bag (1001) and capable of translating along the X and Z axes are provided on the pre-assembly machine table. A plurality of positioning substrates (321), a lower bag-opening mechanism (35), and a bag-pushing mechanism (36) are provided at the front end of the positioning platform. The bag-pushing mechanism (36) includes a bag-pushing plate (361) and a bag-pushing translation driving unit (362) capable of driving the bag-pushing plate (361) to translate. The bag-pushing plate is driven to translate in the X direction by the bag-pushing translation driving unit (362). The filter bag is grasped by the bag-taking mechanism (34) and placed on the positioning platform (32). The bag-pushing plate (361) is driven to translate by the bag-pushing translation driving unit (362) and cooperates with the positioning substrate (321) to accurately position the filter bag. The upper layer of the filter bag (1001) is inserted and moved upward by the upper bag-opening mechanism (33), and the lower layer of the filter bag is inserted and moved downward by the lower bag-opening mechanism (35), thereby expanding the mouth of the filter bag. The flipping device (4) includes a flipping frame (41), two sets of bag-supporting devices provided on the flipping frame, a Y-direction bag-supporting driving mechanism (42) capable of driving the two bag-supporting devices to approach or separate in the Y direction, a flipping driving mechanism (43) capable of driving the flipping frame to flip, and a flipping-frame translation driving mechanism (44) for driving the flipping frame to translate in the X direction. The mouth of the filter bag is kept in an expanded state by the two bag-supporting devices. The flipping frame is driven to flip by the flipping driving mechanism, driving the filter bag to flip so that its mouth faces upward. The flipping frame is driven to translate in the X direction by the flipping-frame translation driving mechanism. The material-taking and clamping device (2) includes a material-taking base (21), two material-taking bottom plates (22), a set of intermediate inner-frame clamping mechanisms (23), two sets of side inner-frame clamping mechanisms (24), an X-direction material-taking and clamping translation driving mechanism (25), and a variable-distance driving mechanism (26). The two material-taking bottom plates (22) are both installed on the bottom surface of the material-taking base (21) and can be moved closer to or away from each other in the X direction by the X-direction material-taking and clamping translation driving mechanism (25). The middle inner frame clamping mechanism (23) is fixed at the middle position of the material taking bottom plate (22), and two groups of the side inner frame clamping mechanisms (24) are mirror-symmetric with the middle inner frame clamping mechanism (23) as the center and are movably installed on the material taking bottom plate (22); the middle inner frame clamping mechanism (23) and the two groups of the side inner frame clamping mechanisms (24) each include two inner frame support clamping assemblies (231) installed on the material taking bottom plate, and the two inner frame support clamping assemblies (231) of each side inner frame clamping mechanism (24) are both installed on the same connecting plate (241) at the same time; the two connecting plates (241) can be driven to approach or move away along the Y direction by the variable pitch driving mechanism (26). Each inner frame support clamping assembly (231) includes an inner side support plate (2311) and a long side outer clamping unit (2312), the upper end of the long side outer clamping unit (2312) is installed on the upper part of the inner side support plate (2311), the inner frame is supported from the inside to the outside by all the inner side support plates (2311), and the long side of the inner frame and the mouth part of the filter bag are pressed and clamped by the long side outer clamping unit (2312).

2. The inner frame pre-assembly machine for filter bags according to claim 1, wherein: The positioning platform (32) is provided with a plurality of strip-shaped grooves (322) extending along the X direction; the bag pushing and translating driving unit (362) includes a bag pushing and translating driving motor (3621), two third synchronous wheels (3622), a fourth synchronous belt (3623) and a bag pushing seat (3624), the third synchronous wheels are located at both ends of the bottom of the positioning platform, one of the third synchronous wheels is installed on the power output end of the bag pushing and translating driving motor, the fourth synchronous belt is sleeved on the third synchronous wheels, the bag pushing seat is fixed on the fourth synchronous belt, and the upper end of the bag pushing seat extends out from the strip-shaped groove and fixedly installs the bag pushing plate.

3. The pre-assembly machine for the inner frame of the filter bag according to claim 1, characterized in that: The upper bag opening mechanism (33) includes an upper needle type suction cup (331) and an upper bag opening driving linear module (332), the upper needle type suction cup is installed on the power output end of the upper bag opening driving linear module, and the upper needle type suction cup is driven to lift and lower by the upper bag opening driving linear module. The lower bag opening mechanism (35) includes a lower needle type suction cup (351) and a lower bag opening driving cylinder (352), the lower needle type suction cup is installed on the power output end of the lower bag opening driving cylinder, and the lower needle type suction cup is driven to lift and lower by the lower bag opening driving cylinder. The bag taking mechanism (34) includes a connecting arm (341) and a suction cup group (342) composed of a plurality of needle type suction cups, and the suction cup group is installed at the lower end of the connecting arm.

4. The inner frame pre-assembly machine for filter bags according to claim 1, characterized in that: The bag supporting device includes an inserting plate (451) and a fixed inserting piece (452), a movable inserting piece (453) installed on the inserting plate, and an inserting piece translating driving linear module (454) capable of driving the movable inserting piece to lift and lower, the fixed inserting piece is fixed at one end of the inserting plate, and the movable inserting piece is driven to lift and lower by the inserting piece translating driving linear module.

5. The pre-assembly machine for the inner frame of the filter bag according to claim 4, wherein: The Y-direction bag-supporting driving mechanism (42) includes a Y-direction bag-supporting driving motor (421), a fourth synchronous pulley (422) and a fifth synchronous belt (423). The fourth synchronous pulley is located at both ends of the turning frame, and the fifth synchronous belt is sleeved on the fourth synchronous pulley. The fourth synchronous pulley is driven to rotate by the Y-direction bag-supporting driving motor; The inserting plates of the two bag-supporting devices are respectively fixed at different ends on different sides of the fifth synchronous belt.

6. The pre-assembly machine for the inner frame of the filter bag according to claim 1, wherein: On the inner side surface of the inner side supporting plate of the side-taking inner frame clamping mechanism (24), there is a short-side outer clamping unit (27). The short sides of the inner frame and the mouth part of the filter bag are pressed and clamped by the short-side outer clamping units (27) on both sides; The short-side outer clamping unit (27) includes a short-side outer clamping driving cylinder (271) and a vertical clamping plate (272). The vertical clamping plate (272) is installed at the power output end of the short-side outer clamping driving cylinder (271).

7. The inner frame pre-assembly machine for filter bags according to claim 1, characterized in that: The long-side outer clamping unit (2312) includes a long-side outer clamping driving cylinder (23121), an inverted "T"-shaped clamping plate (23122) and a pin shaft (23123). The upper end of the "T"-shaped clamping plate is rotatably connected with one side of the bottom of the long-side outer clamping driving cylinder as a fulcrum (23124). There is a cavity (23125) at the middle position of the "T"-shaped clamping plate. The pin shaft (23123) passes through the cavity (23125) and is rotatably connected with the end of the push rod of the long-side outer clamping driving cylinder (23121); By driving the push rod to retract or extend through the long-side outer clamping driving cylinder (23121), the upper end of the "T"-shaped clamping plate (23122) will be driven to rotate around the above-mentioned fulcrum, and further the lower end of the "T"-shaped clamping plate (23122) will be driven to approach or move away from the inner side supporting plate (2311).

8. The inner frame pre-assembly machine for filter bags according to claim 1, wherein: The variable pitch driving mechanism (26) includes a variable pitch driving motor (261), a variable pitch lead screw (262) and two variable pitch nuts (263). The power output end of the variable pitch driving motor (261) is connected to one end of the variable pitch lead screw (262). The variable pitch lead screw (262) is a bidirectional lead screw with different thread pitches. The two variable pitch nuts (263) are respectively fixed on the two connecting plates (241), and the two variable pitch nuts (263) are respectively sleeved on the left and right sections of the variable pitch lead screw (262); There is also a slider-rail structure connecting the material-taking bottom plate (22) and the material-taking base (21).

9. The inner frame pre-assembly machine for filter bags according to claim 1, characterized in that: The X-direction material-taking clamping and translation driving mechanism (25) includes an X-direction material-taking clamping and translation driving motor (251), an X-direction lead screw (252) and two X-direction nuts (253). The power output end of the X-direction material-taking clamping and translation driving motor (251) is connected to one end of the X-direction lead screw (252). The X-direction lead screw (252) is a bidirectional lead screw with different thread pitches. The two X-direction nuts (253) are respectively fixed on the two material-taking bottom plates (22), and the two X-direction nuts (253) are respectively sleeved on the front and back sections of the X-direction lead screw (252); There is also a slider-rail structure connecting the material-taking bottom plate (22) and the material-taking base (21).

10. The inner frame pre-assembly machine for filter bags according to claim 1, wherein: The gantry (1) includes two X-direction cross beams (11), a Y-direction cross beam (12) and a Z-direction beam (13). Both ends of the Y-direction cross beam (12) are slidably connected to the X-direction cross beams (11), and the Z-direction beam (13) can slide in the Y direction along the surface of the Y-direction cross beam; The Z-direction inner frame translation driving mechanism (16) capable of driving the material taking and clamping device (2) to translate in the Z direction includes a Z-direction inner frame translation driving motor (161), a driving wheel (162), an upper idler wheel (163), a lower idler wheel (164) and a belt (165). The driving wheel is located above the upper idler wheel, and the upper idler wheel is located above the lower idler wheel. The upper end of the belt is fixed to the upper end of the Z-direction beam. At the same time, the belt bypasses from below the upper idler wheel to the outer periphery of the driving wheel and then bypasses from above the lower idler wheel. Finally, the lower end of the belt is fixed to the lower end of the Z-direction beam.

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