Washing machine inner barrel lifting rib screwing equipment

Abstract

The invention discloses washing machine inner barrel lifting rib screw driving equipment, and relates to the field of household appliance processing equipment.The washing machine inner barrel lifting rib screw driving equipment comprises a base table, a positioning block connected with the barrel bottom face of an inner barrel in a matched and clamped mode is fixed to the base table, and a plurality of automatic screw driving machines are evenly distributed in the circumferential direction of the positioning block; a reciprocating driving assembly fixed to the automatic screw machines is installed on the base table, when the reciprocating driving assembly moves in the forward direction, the automatic screw machines spirally insert screws into screw holes of the lifting ribs, and when the reciprocating driving assembly moves in the reverse direction, the automatic screw machines spirally insert the screws into the screw holes of the lifting ribs. According to the automatic screw screwing device, the screws on the lifting ribs in all directions of the barrel body can be screwed at the same time, in the whole process, the barrel body does not need to be deflected, the time for fixing the screws on the lifting ribs on the barrel body is shortened, and efficiency improvement is facilitated.

Description

Technical Field

[0001] This invention relates to the field of home appliance processing equipment technology, specifically to a device for screwing in the lifting ribs of a washing machine inner drum. Background Technology

[0002] The lifting ribs in the inner drum of a washing machine are strip structures that come into direct contact with the clothes. They work in conjunction with the rotation of the inner drum to create the effect of dropping and rubbing the clothes. Typically, three lifting rib strips are evenly arranged around the circumference of the inner wall of an inner drum. During the production process, the lifting rib strips are usually engaged with the sliding grooves on the drum body, and then multiple screws are used to further tighten and limit the lifting rib strips to the drum body.

[0003] In the production workshop, screws are usually tightened by an electric screwdriver, which tightens each screw in its corresponding screw hole in turn. Although the existing electric screwdriver has the functions of automatically filling screws and automatically tightening screws, in the actual process of tightening the lifting ribs at three positions around the inner cylinder in turn, after tightening the lifting rib at each position of the inner cylinder, it is necessary to rotate the inner cylinder at a certain angle so that the next lifting rib of the inner cylinder is aligned with the electric screwdriver and the screw is tightened and fixed.

[0004] In practical use, the above solutions typically require a high-precision positioning servo turntable to drive the inner cylinder to deflect at a predetermined angle in order to ensure that the screws of the electric screwdriver are aligned with the screw holes of the lifting ribs in various positions of the inner cylinder. However, this requires high stability of the turntable equipment. Alternatively, a handheld electric screwdriver can be used manually to tighten each lifting rib of the inner cylinder in sequence, but this is not very efficient. To improve these conditions, we propose a new technical solution. Summary of the Invention

[0005] The purpose of this invention is to provide a device for screwing in the lifting ribs of a washing machine inner drum, so as to overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A device for screwing in the lifting ribs of a washing machine drum includes a base platform. A positioning block adapted to and engaging with the bottom surface of the inner drum is fixed on the base platform. Multiple automatic screwdrivers are evenly distributed around the positioning block. A reciprocating drive assembly fixed to each automatic screwdriver is installed on the base platform. When the reciprocating drive assembly moves in the forward direction, each automatic screwdriver inserts a screw into the screw hole of the lifting rib. When the reciprocating drive assembly moves in the reverse direction, each automatic screwdriver completely disengages from the screw hole of the corresponding lifting rib.

[0008] Preferably, the positioning block includes a column base fixed to the top of the base platform, and the top of the column base is fixed with a protrusion adapted to the bottom surface structure of the inner cylinder.

[0009] Preferably, the reciprocating drive assembly includes a planar threaded disk movably sleeved on the outside of the positioning block. The top of the planar threaded disk is provided with an annular plate parallel to it. Multiple through slots distributed in a circular array are opened on the surface of the annular plate. Each through slot is slidably fitted with a slider that meshes with the planar threaded disk. The reciprocating deflection of the planar threaded disk enables the slider to move reciprocally along the through slot.

[0010] Preferably, the automatic screw machine includes a screw machine body, and the screw machine body and the slider are connected by a screw lifting device, which can control the position of the screw machine body in the vertical direction.

[0011] Preferably, a drive motor is fixed on the base, a toothed ring is fixedly sleeved on the outer side of the planar threaded disc, a rack that meshes with the toothed ring is slidably engaged on the base, the drive motor is movably connected to the rack through a transmission assembly, and the drive motor can provide driving force for the reciprocating movement of the rack.

[0012] Preferably, the transmission assembly includes a drive disk connected to the output shaft of the drive motor. A first plate is provided parallel to the disk surface of the drive disk. One end of the first plate is movably hinged to the base platform. A second plate is hinged to the other end of the first plate. The end of the second plate away from the first plate is movably hinged to a rack. A through slot is provided in the length direction of the first plate. A protruding post connected to the drive disk is slidably adapted in the through slot.

[0013] Preferably, the annular plate is fixed to the base platform by a support plate, and the center of the annular plate and the center of the planar threaded disc are on the same vertical line.

[0014] Preferably, each slider has a positioning block on one side located at the top of the annular plate. A plug-in interface is provided on one side of the slider, and a connecting rod fixed to the positioning block is adapted to be plugged into the plug-in interface. The plug-in interface is located on the vertical movement stroke of the screw lifting device. The positioning block can limit the cylinder before all the screws of the lifting rib start to be turned. The positioning block can be removed with the slider after all the screws of the lifting rib finish turning.

[0015] Preferably, the alignment block has a V-shaped groove on the side facing the cylinder, and an elastic buffer pad is fixed inside the groove wall.

[0016] Preferably, the length line of the through slot coincides with the diameter line of the annular plate.

[0017] In the above technical solution, the present invention provides a washing machine inner drum lifting rib screw-driving device. By setting a positioning block on the base platform that is adapted to and snaps into the bottom surface of the inner drum, the position of the inner drum is defined. Multiple automatic screw machines are evenly distributed around the positioning block. Driven by the reciprocating drive component, each automatic screw machine can simultaneously complete the screw turning on the lifting ribs in various positions of the drum. In the whole process, there is no need to deflect the drum, and the time for fixing the lifting ribs to the drum is shortened, which helps to improve efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is an overall schematic diagram of a device for screwing in the lifting ribs of a washing machine inner drum according to the present invention;

[0020] Figure 2 For the present invention Figure 1 Enlarged view at point D;

[0021] Figure 3 For the present invention Figure 1 Enlarged view at point E in the middle;

[0022] Figure 4 This is a schematic diagram of a planar threaded disc for a device for screwing in the lifting ribs of a washing machine inner drum according to the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Base platform; 2. Positioning block; 2.1. Column base; 2.2. Protrusion; 3. Automatic screw machine; 3.1. Screw machine body; 3.2. Screw lifting device; 3.21. Base; 3.22. Lifting platform; 4. Reciprocating drive assembly; 4.1. Flat threaded disc; 4.2. Ring plate; 4.3. Through slot; 4.4. Slider; 5. Drive motor; 6. Gear ring; 7. Rack; 8. Transmission assembly; 8.1. Drive disc; 8.2. First plate; 8.3. Second plate; 8.4. Through slot; 8.5. Protruding column; 9. Support plate; 10. Alignment block; 11. Insertion interface; 12. Connecting rod; 13. V-groove; 14. Elastic buffer pad; 15. Paddle; 16. Wedge-shaped part; 17. Protrusion. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Please see Figures 1-4 The present invention provides a device for screwing in the lifting ribs of a washing machine drum, comprising a base platform 1, a positioning block 2 fixed on the base platform 1 and adapted to engage with the bottom surface of the inner drum, a plurality of automatic screwdrivers 3 evenly distributed around the positioning block 2, and a reciprocating drive assembly 4 fixed to each automatic screwdriver 3 installed on the base platform 1. When the reciprocating drive assembly 4 moves in the forward direction, each automatic screwdriver 3 inserts a screw into the screw hole of the lifting rib. When the reciprocating drive assembly 4 moves in the reverse direction, each automatic screwdriver 3 completely disengages from the screw hole of the corresponding lifting rib.

[0027] Specifically, the top surface of the base platform 1 is parallel to the horizontal plane. The positioning block 2 includes a column base 2.1 fixed to the top of the base platform 1. The top of the column base 2.1 is fixed with a protrusion 2.2 that matches the bottom surface of the inner drum. The inner drum refers to the drum structure that directly contacts the clothes in the washing machine. The bottom of the drum has an inwardly recessed three-pronged groove structure. The protrusion 2.2 is a protrusion of the three-pronged structure that matches and engages with the three-pronged groove structure. Thus, after the bottom surface of the inner drum matches and contacts the protrusion 2.2, the protrusion 2.2 can quickly position the inner drum and restrict the axial rotation of the inner drum to ensure subsequent lifting. When the lifting ribs are fixed to the inner cylinder by screws, the inner cylinder has good stability; the automatic screw machine 3 includes a locking execution component that screws into the screw holes, and a screw feeding component that feeds one screw at a time. The automatic screw machine 3 is an existing device and will not be described in detail; the reciprocating drive component 4 can drive the automatic screw machine 3 to move closer to the inner cylinder, so that the screws can be inserted into the screw holes of the lifting ribs to complete the screwing. The reciprocating drive component 4 can also drive the automatic screw machine 3 to move away from the inner cylinder, so that the bit of the automatic screw machine 3 can be completely disengaged from the screw holes of the lifting ribs.

[0028] In practical use, the inner cylinder is placed vertically so that the bottom of the cylinder matches the positioning block 2. Then, the reciprocating drive assembly 4 moves in the forward direction, causing each automatic screwdriver 3 to move closer to the inner cylinder, allowing the screw to be inserted into the screw hole of the lifting rib and tightened. Then, the reciprocating drive assembly 4 moves in the reverse direction, allowing the bits of each automatic screwdriver 3 to completely disengage from the screw hole of the lifting rib. Thus, during the entire process of screwing the lifting rib of the inner cylinder, there is no need to deflect the cylinder. Multiple automatic screwdrivers 3 can operate simultaneously, and the time for fixing the lifting rib to the cylinder with screws is also shortened, which helps to improve efficiency.

[0029] In another embodiment of the present invention, the reciprocating drive assembly 4 includes a planar threaded disk 4.1 movably sleeved on the outside of the positioning block 2. Specifically, the planar threaded disk 4.1 is movably sleeved on the outside of the column base 2.1. The disk surface of the planar threaded disk 4.1 is parallel to the horizontal plane. An annular plate 4.2 is provided parallel to the top of the planar threaded disk 4.1. There is a gap between the bottom of the annular plate 4.2 and the top of the planar threaded disk 4.1. Multiple circularly arranged through slots 4.3 are opened on the surface of the annular plate 4.2. The through slots 4.3 are straight slots, and the length direction line of the through slots 4.3 coincides with the diameter line of the annular plate 4.2. Each through slot 4.3 is fitted with a slider 4.4 that meshes with the planar threaded disk 4.1. The top of the slider 4.4 protrudes above the surface of the annular plate 4.2, and the bottom of the slider 4.4 is provided with a toothed structure that slides with the spiral of the planar threaded disk 4.1. The reciprocating deflection of the planar threaded disk 4.1 enables the slider 4.4 to reciprocate along the through slot 4.3. The annular plate 4.2 is fixed to the base platform 1 by a support plate 9, and the center of the annular plate 4.2 and the center of the planar threaded disk 4.1 are on the same vertical line.

[0030] In another embodiment of the present invention, the automatic screw machine 3 includes a screw machine body 3.1. The screw machine body 3.1 is connected to the slider 4.4 via a screw lifting device 3.2. The screw lifting device 3.2 can control the position of the screw machine body 3.1 in the vertical direction. Specifically, the screw lifting device 3.2 includes a base 3.21, a screw, a nut, a lifting platform 3.22, a linear guide rail, a motor, and a coupling. Since the screw lifting device 3.2 is an existing structure, its specific principle will not be described in detail. The lifting platform 3.22 of the screw lifting device 3.2 is fixed to the screw machine body 3.1 of the automatic screw machine 3, and the base 3.21 of the screw lifting device 3.2 is fixed to the slider 4.4.

[0031] In actual use, the lifting platform 3.22 of the screw lifting device 3.2 can move linearly relative to the base 3.21 in the vertical direction, and the lifting platform 3.22 can drive the automatic screw machine 3 to change its position in the vertical direction;

[0032] For example, the lifting rib has two screw holes, and the line connecting the two screw holes is parallel to the upgrade trajectory line of the lifting platform 3.22. The two screw holes are the upper screw hole and the lower screw hole, respectively. First, after the forward drive and reverse drive of the reciprocating drive component 4, the automatic screw machine 3 completes the screw turning of the upper screw hole of the lifting rib. Then, the lifting platform 3.22 drives the automatic screw machine 3 to move down along the vertical line, so that the automatic screw machine 3 is aligned with the lower screw hole. Then, after the forward drive and reverse drive of the reciprocating drive component 4 again, the automatic screw machine 3 completes the screw turning of the lower screw hole. Then, the inner cylinder can be separated from the positioning block 2, so that the inner cylinder on the positioning block 2 can be replaced.

[0033] It should be noted that during the replacement of the inner cylinder, the lifting platform 3.22 drives the automatic screw machine 3 to move upward along the vertical direction line, so as to align with the upper screw hole of the lifting rib on the replaced inner cylinder, and prepare for the screw to be turned in the upper screw hole.

[0034] In another embodiment of the present invention, a drive motor 5 is fixed on the base platform 1, a toothed ring 6 is fixedly sleeved on the outer side of the planar threaded disk 4.1, and a rack 7 that meshes with the toothed ring 6 is slidably engaged on the base platform 1. The length direction line of the rack 7 is parallel to the disk surface of the planar threaded disk 4.1. The drive motor 5 is movably connected to the rack 7 through a transmission assembly 8, and the drive motor 5 can provide driving force for the reciprocating movement of the rack 7.

[0035] Specifically, the transmission assembly 8 includes a drive disk 8.1 connected to the output shaft of the drive motor 5. The disk surface of the drive disk 8.1 is parallel to the disk surface of the planar threaded disk 4.1. A first plate 8.2 is provided parallel to the disk surface of the drive disk 8.1. The first plate 8.2 is located directly above the drive disk 8.1. One end of the first plate 8.2 is movably hinged to the base platform 1, and the other end of the first plate 8.2 is hinged to a second plate 8.3. The end of the second plate 8.3 away from the first plate 8.2 is movably hinged to the rack 7. A through slot 8.4 is provided in the length direction of the first plate 8.2. The through slot 8.4 is located on the plate body of the first plate 8.2. A protruding post 8.5 connected to the drive disk 8.1 is slidably fitted inside the through slot 8.4.

[0036] In actual use, the drive motor 5 continuously drives the drive disk 8.1 to rotate in the forward direction. Preferably, the drive motor 5 is a servo drive motor, which facilitates the control of the rotation speed of the drive disk 8.1. During the forward rotation of the drive disk 8.1, the protruding column 8.5 undergoes corresponding synchronous movement. During the movement, the protruding column 8.5 drives the first plate 8.2 to reciprocate through the through slot 8.4. During the reciprocating deflection of the first plate 8.2, the second plate 8.3 provides driving force for the reciprocating linear motion of the rack 7. It should be noted that the linear motion trajectory of the rack 7 is parallel to the length direction of the rack 7. During the reciprocating linear motion of the rack 7, the planar threaded disk 4.1 is reciprocated through the toothed ring 6 by the reciprocating drive of the rack 7, thereby providing driving force for the slider 4.4 to reciprocate along the through slot 4.3.

[0037] It should be further noted that the two ends of the through slot 8.4 have points A and C respectively, and point B is located between points A and C, as shown in the attached diagram of the instruction manual. Figure 4 As shown, during the process of the protruding column 8.5 driving the first plate 8.2 to reciprocate through the through slot 8.4, when the first plate 8.2 deflects in the positive direction, the rack 7 moves in a positive linear direction under the pushing action of the second plate 8.3, the flat threaded disk 4.1 deflects in the positive direction, and then the slider 4.4 moves closer to the inner cylinder along the through slot 4.3. During this process, the protruding column 8.5 moves from point B to point C of the through slot 8.4, and then returns from point C to point B.

[0038] When the first plate 8.2 deflects in the opposite direction, the rack 7 moves in the opposite straight line under the pulling action of the second plate 8.3, the flat threaded disk 4.1 deflects in the opposite direction, and then the slider 4.4 moves away from the inner cylinder along the through slot 4.3. During this process, the protruding column 8.5 moves from point B of the through slot 8.4 to point A, and then returns from point A to point B.

[0039] Throughout the process, the slider 4.4 moves towards the inner cylinder along the through slot 4.3 at a slower speed than it moves away from the inner cylinder along the through slot 4.3. In practical applications, this allows the automatic screw machine 3 to slowly push the screw as it is being turned, and then quickly separate the automatic screw machine 3 from the screw after it has been turned, thereby further shortening the processing time and improving work efficiency.

[0040] In another embodiment of the present invention, each slider 4.4 is provided with a positioning block 10 located on the top of the annular plate 4.2 on one side. The positioning block 10 is located between the inner cylinder and the slider 4.4. An insertion interface 11 is provided on one side of the slider 4.4. The insertion interface 11 extends laterally through the block of the slider 4.4. A connecting rod 12 fixed to the positioning block 10 is adapted to be inserted into the insertion interface 11. The axis of the connecting rod 12 is parallel to the horizontal plane. The rod of the connecting rod 12 can pass through the slider 4.4. The insertion interface 11 is located in the screw lifting device 3. Furthermore, in the vertical movement stroke of the lifting platform 3.22, a lever 15 is movably hinged to the bottom of the lifting platform 3.22. The lever 15 is in a vertical state in its natural state. The deflection range of the lever 15 is 90 degrees. The lever 15 can only deflect between the horizontal position and the vertical position. Preferably, a torsion spring is provided at the position where the lever 15 is movably hinged to the bottom of the lifting platform 3.22, so as to keep the lever 15 in a vertical state in its natural state. A protrusion 17 is fixed to the bottom of the lifting platform 3.22 to restrict the deflection of the lever 15.

[0041] A wedge-shaped part 16 is fixed on the rod body of the connecting rod 12. The positioning block 10 can limit the cylinder before all the screws of the lifting rib start to be turned. The positioning block 10 can be removed with the slider 4.4 after all the screws of the lifting rib are turned. Furthermore, a V-shaped groove 13 is opened on the side of the positioning block 10 facing the cylinder. An elastic buffer pad 14 is fixed in the groove wall of the V-shaped groove 13. The bottom of the positioning block 10 is in contact with the top plate surface of the annular plate 4.2.

[0042] In actual use, for example, the lifting rib has two screw holes, namely the upper screw hole and the lower screw hole. In the initial state, the automatic screw machine 3 is aligned with the upper screw hole on the same horizontal line. When the automatic screw machine 3 is driven in the forward direction by the reciprocating drive assembly 4, the slider 4.4 of the reciprocating drive assembly 4 moves towards the inner cylinder. At the same time, the positioning block 10 is also pushed by the slider 4.4, so that the positioning block 10 contacts the inner cylinder, thereby playing an auxiliary positioning role on the side of the inner cylinder.

[0043] When the automatic screw machine 3 finishes screwing the screw in the upper screw hole of the lifting rib, the automatic screw machine 3 is then driven in the opposite direction by the reciprocating drive component 4, so that the automatic screw machine 3 is separated from the screw in the upper screw hole. During this process, the positioning block 10 remains in contact with the inner cylinder, and the connecting rod 12 moves relative to the insertion interface 11 until the automatic screw machine 3 returns to the initial position.

[0044] Then the lifting platform 3.22 drives the automatic screw machine 3 to move downward along the vertical direction line, so that the automatic screw machine 3 is aligned with the lower screw hole. At the same time, the paddle 15 also descends to the movement trajectory line of the wedge-shaped part 16.

[0045] Then, after the automatic screw machine 3 is driven forward again by the reciprocating drive assembly 4, it completes the screw turning of the lower screw hole. During this process, the paddle 15 is deflected by the inclined part of the wedge 16 and then passes over the wedge 16. When the automatic screwdriver 3 is driven in the reverse direction by the reciprocating drive assembly 4, the paddle 15 passes through the wedge-shaped part 16. At this time, the paddle 15 contacts the vertical part of the wedge-shaped part 16. The paddle 15 cannot deflect due to the obstruction of the protrusion 17. With the reverse drive of the reciprocating drive assembly 4, the paddle 15 drives the positioning block 10 to move synchronously through the wedge-shaped part 16, causing the positioning block 10 to separate from the inner cylinder. At this time, all the screws on the inner cylinder have been turned. The lifting platform 3.22 then drives the automatic screwdriver 3 to move upward along the vertical direction line. During this process, the paddle 15 also rises away from the movement trajectory line of the wedge-shaped part 16, thereby preventing the automatic screwdriver 3 from separating from the screws in the upper positioning screw hole and preventing the paddle 15 from exerting force on the positioning block 10. This achieves the effect that the positioning block 10 can limit the cylinder before all the screws of the lifting rib start to be turned, and the positioning block 10 can be withdrawn with the slider 4.4 after all the screws of the lifting rib have finished turning.

[0046] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for screwing in the lifting ribs of a washing machine inner drum, comprising a base platform (1), characterized in that, The base platform (1) is fixed with a positioning block (2) that is adapted to and snapped into the bottom surface of the inner cylinder. Multiple automatic screw machines (3) are evenly distributed around the positioning block (2). The base platform (1) is equipped with a reciprocating drive assembly (4) that is fixed to each automatic screw machine (3). When the reciprocating drive assembly (4) moves in the forward direction, each automatic screw machine (3) inserts the screw into the screw hole of the lifting rib. When the reciprocating drive assembly (4) moves in the reverse direction, each automatic screw machine (3) completely disengages from the screw hole of the corresponding lifting rib.

2. The device for screwing in the lifting ribs of a washing machine inner drum according to claim 1, characterized in that, The positioning block (2) includes a column base (2.1) fixed to the top of the base platform (1), and the top of the column base (2.1) is fixed with a protrusion (2.2) adapted to the structure of the bottom surface of the inner cylinder.

3. The device for screwing in the lifting ribs of a washing machine inner drum according to claim 1, characterized in that, The reciprocating drive assembly (4) includes a planar threaded disk (4.1) movably sleeved on the outside of the positioning block (2). The top of the planar threaded disk (4.1) is provided with an annular plate (4.2) parallel to it. The annular plate (4.2) has multiple through slots (4.3) arranged in a circular array on its surface. Each through slot (4.3) is fitted with a slider (4.4) that meshes with the planar threaded disk (4.1). The reciprocating deflection of the planar threaded disk (4.1) enables the slider (4.4) to reciprocate along the through slot (4.3).

4. The device for screwing in the lifting ribs of a washing machine inner drum according to claim 3, characterized in that, The automatic screw machine (3) includes a screw machine body (3.1), and the screw machine body (3.1) and the slider (4.4) are connected by a screw lifting device (3.2). The screw lifting device (3.2) can control the position of the screw machine body (3.1) in the vertical direction.

5. The device for screwing in the lifting ribs of a washing machine inner drum according to claim 4, characterized in that, A drive motor (5) is fixed on the base platform (1). A toothed ring (6) is fixedly sleeved on the outer side of the planar threaded disc (4.1). A rack (7) that meshes with the toothed ring (6) is slidably engaged on the base platform (1). The drive motor (5) is movably connected to the rack (7) through a transmission assembly (8). The drive motor (5) can provide driving force for the reciprocating movement of the rack (7).

6. The device for screwing in the lifting ribs of a washing machine inner drum according to claim 5, characterized in that, The transmission assembly (8) includes a drive disk (8.1) connected to the output shaft of the drive motor (5). A first plate (8.2) is provided parallel to the disk surface of the drive disk (8.1). One end of the first plate (8.2) is movably hinged to the base platform (1). A second plate (8.3) is hinged to the other end of the first plate (8.2). The end of the second plate (8.3) away from the first plate (8.2) is movably hinged to the rack (7). A through slot (8.4) is provided in the length direction of the first plate (8.2). A protruding column (8.5) connected to the drive disk (8.1) is slidably fitted in the through slot (8.4).

7. The device for screwing in the lifting ribs of a washing machine inner drum according to claim 6, characterized in that, The annular plate (4.2) is fixed to the base platform (1) by a support plate (9), and the center of the annular plate (4.2) and the center of the planar threaded disc (4.1) are on the same vertical line.

8. The device for screwing in the lifting ribs of a washing machine inner drum according to claim 6, characterized in that, Each slider (4.4) has a positioning block (10) on one side located at the top of the ring plate (4.2). A plug-in interface (11) is provided on one side of the slider (4.4). A connecting rod (12) fixed to the positioning block (10) is adapted to be plugged into the plug-in interface (11). The plug-in interface (11) is located on the vertical movement stroke of the screw lifting device (3.2). The positioning block (10) can limit the cylinder before all the screws of the lifting rib start to be turned. The positioning block (10) can be removed with the slider (4.4) after all the screws of the lifting rib have finished turning.

9. The device for screwing in the lifting ribs of a washing machine inner drum according to claim 8, characterized in that, The alignment block (10) has a V-shaped groove (13) on the side facing the cylinder, and an elastic buffer pad (14) is fixed inside the groove wall of the V-shaped groove (13).

10. The device for screwing in the lifting ribs of a washing machine inner drum according to claim 3, characterized in that, The length line of the through slot (4.3) coincides with the diameter line of the annular plate (4.2).

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