Press fitting structure with self-resetting function

Abstract

The utility model relates to a press-fitting structure with a self-resetting function, which comprises a support component, a press-fitting component and a press-fitting component, and the support component comprises a bottom plate and a rotating plate rotatably mounted at the top of the bottom plate; the bearing assembly is annularly arranged at the top of the rotating plate and comprises an adjusting plate elastically arranged at the top of the rotating plate, a carrying plate fixed to the top of the adjusting plate, a carrying groove formed in the top of the carrying plate and an inserting frame elastically arranged at the top of the rotating plate, and the inserting frame is in sliding connection with the adjusting plate; the press-fitting assembly comprises a press-fitting frame fixed to the top of the bottom plate and a pressing plate arranged on one side of the press-fitting frame in a lifting mode. The press-fitting structure with the self-resetting function is high in automation degree, an operator does not need to carry out press-fitting operation, the press-fitting efficiency of products is remarkably improved, the labor intensity of the operator is reduced, and the input cost is lower.

Description

Technical Field

[0001] The utility model belongs to the technical field of press-fitting, and in particular relates to a press-fitting structure with a self-resetting function. Background Art

[0002] Pressing is a commonly used assembly method, which presses the part to be assembled into another part by applying a certain force to achieve the purpose of fastening. This method is suitable for occasions that require high-strength and high-precision connections, such as machinery manufacturing, aerospace, automobile manufacturing and other industries.

[0003] In the manufacturing industry, many workpieces to be assembled are often of interlocking structures, that is, one workpiece has an interlocking convex part (such as a shaft) and the other workpiece has a concave part (such as a hole) that matches it. Generally, when processing such assembled workpieces, the matching relationship between the convex part and the concave part is an interference fit or a transition fit. In this case, it is necessary to press the two workpieces together during the assembly process until they are assembled into place.

[0004] As attached Figure 1 As shown in the figure, the product consists of a pressing sheet and a lifting ear that are pressed together. The lifting ear hole is provided on the lifting ear, and a convex column is integrally connected to the pressing sheet. During the actual press-fitting, the lifting ear hole is pressed into the pressing column of the pressing sheet, thereby forming Figure 1 Products shown.

[0005] In the prior art, manual assembly is usually performed by operators, which has low efficiency and increases the labor intensity of operators. Not only is the labor cost very high, but also manual compression assembly is prone to incomplete assembly, which affects the product qualification rate and causes rework. Utility Model Content

[0006] The utility model provides a press-fitting structure with a self-resetting function, which solves the defects of low press-fitting efficiency, high investment cost and failure to ensure press-fitting effect in the prior art that relies on manual press-fitting by operators.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a press-fit structure with a self-resetting function, which comprises:

[0008] A support assembly, the support assembly comprising a bottom plate and a rotating plate rotatably mounted on the top of the bottom plate;

[0009] A bearing assembly ring-mounted on the top of the rotating plate, the bearing assembly comprising an adjustment plate elastically arranged on the top of the rotating plate, a carrier plate fixed on the top of the adjustment plate, a carrier slot opened on the top of the carrier plate, and a plug-in bracket elastically arranged on the top of the rotating plate, the plug-in bracket being slidably connected to the adjustment plate;

[0010] A press-fitting assembly, the press-fitting assembly comprising a press-fitting frame fixed on the top of the bottom plate and a press plate escalably arranged on one side of the press-fitting frame;

[0011] A reset assembly includes a turntable fixed on the top of the rotating plate, a locking mechanism arranged around the top of the turntable, and a reset mechanism arranged on the inner side of the locking mechanism. The locking mechanism is used to lock the adjustment plate after being pressed, and the reset mechanism is used to unlock the locked adjustment plate.

[0012] Optimally, the bearing assembly also includes a fixed rod fixed on the top of the rotating plate, a baffle plate sleeved on the fixed rod and fixed to the adjustment plate, a first spring sleeved on the fixed rod, and an anti-slip plate fixed on the top of the fixed rod, the two sides of the first spring are respectively abutted between the rotating plate and the baffle plate, and the diameter of the anti-slip plate is larger than the diameter of the fixed rod.

[0013] Optimally, the bearing assembly also includes a connecting plate slidably connected to one side of the adjustment plate, a fixed plate fixed to one side of the connecting plate, a guide plate fixed to the top of the rotating plate, a spring arranged between the fixed plate and the guide plate, and an upper top column fixed to the bottom of the fixed plate and passing through the guide plate and the rotating plate, and the plug-in bracket is fixed to one side of the connecting plate.

[0014] Optimally, the press-fitting assembly further comprises a support column fixed on the top of the rotating plate and a lower top plate fixed on the top of the support column. When the press-fitting assembly is press-fitted, the upper top column descends and abuts against the top of the lower top plate.

[0015] Optimally, the locking mechanism includes pivot plates fixed at intervals on the top of the turntable, a locking plate rotatably installed between the pivot plates, a locking protrusion integrally connected to the top of the locking plate, a contact portion obliquely arranged at the top of the locking protrusion, a back plate fixed on the inner side of the pivot plate, and a second spring fixed between the back plate and the locking plate. When the press-fit assembly is pressed, the baffle is engaged at the bottom of the locking protrusion.

[0016] Optimally, the engaging mechanism further comprises an extension plate fixed on the engaging plate and extending toward a side away from the baffle plate, and a contact column fixed at the bottom of the extension plate.

[0017] Optimally, the reset mechanism includes a fixed column fixed on the base plate and passing through the rotating plate and the turntable, a fixed disk fixed on the top of the fixed column, a guide plate integrally connected to the top of the fixed disk, and a contact arc arranged on the inner side of the guide plate. When the rotating plate rotates, the contact column abuts against the contact arc, forcing the clamping plate to rotate inward to unlock the baffle.

[0018] Optimally, the press-fitting assembly further comprises a second slide rail fixed to one side of the press-fitting frame, a second slider slidably mounted on the second slide rail, and a lifting plate fixed to the second slider, wherein the lifting plate is fixed to the press plate.

[0019] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0020] The utility model discloses a press-fitting structure with self-resetting function to support the lifting ear and pressing piece to be pressed by the bearing assembly, the rotating plate drives the bearing assembly to rotate to the pressing assembly, and the pressing assembly automatically completes the pressing work of the product. At the same time, the locking mechanism locks the baffle plate to facilitate subsequent inspection and unloading, and then the reset mechanism unlocks the baffle plate to ensure that the lifting ear is still above the pressing piece during the next pressing. The whole process has a high degree of automation and does not require an operator to perform the pressing operation, which significantly improves the pressing efficiency of the product, reduces the labor intensity of the operator, and reduces the investment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a press-fit product;

[0022] Figure 2 It is a schematic diagram of the structure of the utility model;

[0023] Figure 3 It is the front view of the utility model;

[0024] Figure 4 It is a partial structural schematic diagram of the utility model;

[0025] Figure 5 For this utility model Figure 4 The main view of

[0026] Figure 6 This is a schematic diagram of the structure of the fixed disk of the utility model;

[0027] Description of reference numerals:

[0028] 1. Bottom plate; 2. Rotating drive member; 3. Turn plate; 4. Angle plate; 5. Positioning cylinder; 6. Fixing rod; 7. Anti-slip plate; 8. Baffle plate; 9. Adjusting plate; 10. Carrying plate; 11. Carrying slot; 12. First slide rail; 13. First slide block; 14. Connecting plate; 15. Inserting rack; 16. Fixing plate; 17. Guide plate; 18. Upper pillar; 19. Support pillar; 20. Lower roof; 22. Pressing rack; 23. Pressing cylinder; 24 , second slide rail; 25, second slider; 26, lifting plate; 27, pressure plate; 29, first spring; 30, turntable; 31, pivot plate; 32, abutment plate; 33, clamping plate; 34, second spring; 35, clamping cam; 36, contact portion; 37, extension plate; 38, contact column; 39, fixed column; 40, fixed disk; 41, guide plate; 42, contact arc; 43, lifting ear; 44, lifting ear hole; 45, pressure sheet; 46, pressure column. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0030] like Figure 2 , 3 FIG. 1 is a schematic diagram of a press-fit structure with a self-resetting function of the utility model, which is used to press the ear 43 onto the pressing sheet 45, that is, during the press-fitting, the ear hole 44 is pressed into the pressing column 46 of the pressing sheet 45, thereby forming Figure 1 The product shown. The structure includes a supporting component, a bearing component, a press-fit component and a reset component.

[0031] The supporting assembly includes a base plate 1, a rotating drive member 2, a turn plate 3, an angle plate 4 and a positioning cylinder 5. The base plate 1 is fixed on the press machine table by screws, the rotating drive member 2 is fixed on the top of the base plate 1, and the turn plate 3 is connected to the rotating part of the rotating drive member 2. The turn plate 3 is driven to rotate by the rotating drive member 2, and then the ear 43 and the pressing plate 45 on the turn plate 3 are driven to rotate to the press assembly for press-fitting (the rotating drive member 2 uses a commercially available NJ60-5C hollow rotating platform to facilitate the subsequent passage of the fixed column 39).

[0032] There are four groups of stations on the top of the rotating plate 3, namely the first station, the second station, the third station and the fourth station, and the angle between each two adjacent groups of stations is 90°. The rotating drive member 2 drives the rotating plate 3 to rotate cyclically, thereby completing the cyclic pressing of the product. The first station is the loading station, where the operator places the ear 43 and the pressing sheet 45 to be pressed; the pressing assembly is set at the second station, and the ear 43 rotated there is pressed onto the pressing sheet 45; the third station is the inspection station, where an external CCD camera inspects the pressed product to ensure whether the product is pressed in place; the fourth station is the unloading station, where the robot grabs the inspected product and completes the unloading (the CCD camera and the robot are not shown in the figure).

[0033] The angle plate 4 is fixed on the outer wall of the casing of the rotating drive component 2, the cylinder body of the positioning cylinder 5 is fixed on the angle plate 4, and a positioning hole matching the piston rod of the positioning cylinder 5 is opened on the rotating plate 3. When the rotating plate 3 rotates one circle, the pressing and unloading of a product is completed. At this time, the piston rod of the positioning cylinder 5 rises and passes through the positioning hole of the rotating plate 3 to position the rotating plate 3, and then the positioning cylinder 5 is reset to improve the accuracy of the rotation position of the rotating plate 3.

[0034] There are four groups of bearing components, which are respectively located at four stations of the rotating plate 3, and are used to place the ears 43 and the pressing sheets 45 to be pressed. Each group of bearing components includes a fixed rod 6, an anti-slip plate 7, a baffle 8, an adjustment plate 9, a carrier plate 10, a loading slot 11, a first slide rail 12, a first slider 13, a connecting plate 14, a plug-in bracket 15, a fixed plate 16, a guide plate 17 and an upper pillar 18. The fixed rod 6 is vertically fixed on the top of the rotating plate 3, and the baffle 8 is sleeved on the fixed rod 6, and the baffle 8 can move up and down along the fixed rod 6. The first spring 29 is sleeved on the fixed rod 6, and the two sides of the first spring 29 are respectively against the rotating plate 3 and the baffle 8. By setting the first spring 29, the carrier plate 10 is bounced to the original position after the pressing is completed, which is convenient for the pressing of the next product.

[0035] The adjusting plate 9 is in an "L" shape, one side of the adjusting plate 9 is sleeved on the fixing rod 6, and the other side of the adjusting plate 9 is fixed to the baffle 8, so the movement of the adjusting plate 9 and the baffle 8 is synchronous. When the adjusting plate 9 is pressed, the descent of the baffle 8 will drive the baffle 8 to descent synchronously, thereby compressing the first spring 29; when the baffle 8 is reset, the reset rise of the baffle 8 will drive the adjusting plate 9 to rise synchronously.

[0036] The carrier plate 10 is fixed to the top of the adjustment plate 9 by screw fastening, and the loading slot 11 is opened on the top of the carrier plate 10 and matches the shape of the lifting lug 43. At the first station, the operator buckles the lifting lug 43 made of plastic into the loading slot 11 of the carrier plate 10 to complete the loading of the lifting lug 43. The anti-slip plate 7 is fixed to the top of the fixing rod 6, and the diameter of the anti-slip plate 7 is larger than the diameter of the fixing rod 6, so as to prevent the carrier plate 10 from being ejected from the top of the fixing rod 6 during resetting.

[0037] The first slider 13 is fixed to the side of the adjustment plate 9 away from the fixing rod 6, the first slide rail 12 is slidably mounted on the first slider 13, and the connecting plate 14 is fixed on the first slide rail 12. By providing the first slider 13 and the first slide rail 12, the ascending and descending movements of the carrier plate 10 are guided, thereby improving the accuracy of the product after press-fitting.

[0038] The inserting rack 15 is fixed to the side of the connecting plate 14 away from the first slide rail 12 (the inserting rack 15 is slidably connected to the adjusting plate 9). At the first station, the operator inserts the pressing piece 45 to be pressed on the inserting rack 15 to complete the loading of the pressing piece 45. The fixed plate 16 is fixed to the bottom of the inserting rack 15, and the upper pillar 18 is fixed to the bottom of the fixed plate 16 and penetrates the rotating plate 3, and moves synchronously with the fixed plate 16. The guide plate 17 is fixed to the top of the rotating plate 3 and is located below the fixed plate 16. The guide plate 17 is provided with a guide hole, and the upper pillar 18 penetrates the guide hole.

[0039] A spring is fixed between the fixed plate 16 and the guide plate 17. On the one hand, a gap is left between the fixed plate 16 and the guide plate 17 to ensure that the fixed plate 16 has space to descend during press-fitting, thereby avoiding direct external pressure on the rotating plate 3 and tilting the rotating plate 3. On the other hand, the spring is used to push the rack 15 back to its original position during resetting.

[0040] During press-fitting, the press-fitting assembly will press the carrier plate 10 downward, and the carrier plate 10 will move downward to abut against the connecting plate 14, and then press the inserting frame 15 and the fixing plate 16 downward. At this time, the upper top column 18 will descend through the guide hole and abut against the lower top plate 20 below, and then the press-fitting of the product will be completed (the spring between the fixing plate 16 and the guide plate 17 is compressed). By setting the upper top column 18 and the lower top plate 20 that cooperate with each other, the rigid press-fitting of the product is achieved, and the external pressure is prevented from acting on the rotating plate 3, which will tilt the rotating plate 3 and affect the press-fitting effect.

[0041] The press-fitting assembly is fixed on the top of the bottom plate 1 and is located at the second station of the rotating plate 3. The ear 43 rotated to this position is pressed onto the pressing plate 45. The press-fitting assembly includes a support column 19, a lower top plate 20, a press-fitting frame 22, a press-fitting cylinder 23, a second slide rail 24, a second slide block 25, a lifting plate 26 and a pressing plate 27. The press-fitting frame 22 is fixed on the top of the bottom plate 1, the cylinder body of the press-fitting cylinder 23 is fixed on the press-fitting frame 22, the guide rod of the press-fitting cylinder 23 is connected to the pressing plate 27, and the pressing plate 27 is driven down by the press-fitting cylinder 23 to complete the press-fitting of the ear 43 and the pressing plate 45.

[0042] The second slide rail 24 is fixed to the side of the press-fitting frame 22 close to the rotating plate 3, and the second slider 25 is slidably mounted on the second slide rail 24. The lifting plate 26 is fixed between the second slider 25 and the pressing plate 27, and the lifting stability of the pressing plate 27 is improved to improve the effect after the press-fitting. The bottom of the pressing plate 27 is provided with an avoidance hole to avoid the convex column position of the pressing sheet 45 during the press-fitting.

[0043] The support column 19 is vertically fixed on the top of the bottom plate 1, and the lower top plate 20 is fixed on the top of the support column 19, and cooperates with the upper top column 18 to jointly complete the rigid press-fitting of the product, avoiding external pressure acting on the rotating plate 3, pressing the rotating plate 3 to tilt, and affecting the press-fitting effect.

[0044] The reset component is arranged on the top of the rotating plate 3 and is located at the center of the rotating plate 3. It cooperates with the baffle 8 to realize the automatic reset of the carrier plate 10 after the press-fitting is completed, so as to facilitate the press-fitting of the next product. Figure 4 , 5 As shown, the reset assembly includes a turntable 30 , a locking mechanism and a reset mechanism. The turntable 30 is fixed on the top of the rotating plate 3 and rotates synchronously with the rotating plate 3 .

[0045] There are four groups of engaging mechanisms, which are arranged in a ring on the top of the turntable 30. The press-fitting assembly is used to engage the baffle 8 when the product is pressed. The engaging mechanism includes a pivot plate 31, a butt plate 32, a clamping plate 33, a second spring 34, a clamping protrusion 35, a contact portion 36, an extension plate 37 and a contact column 38. The pivot plates 31 are fixed at intervals on the top of the turntable 30, and the clamping plate 33 is rotatably installed between the two pivot plates 31 through a pin. The clamping protrusion 35 is integrally connected to the top of the clamping plate 33, and the contact portion 36 is arranged on the top of the clamping protrusion 35 and is inclined toward one side of the baffle 8. The connection between the clamping protrusion 35 and the clamping plate 33 forms a "hooking" structure, which is used to engage the baffle 8 that descends during the press-fitting process.

[0046] The butt plate 32 is fixed on the inner side of the pivot plate 31, and the second spring 34 is fixed between the butt plate 32 and the clamping plate 33. During the actual press-fitting, the press-fitting assembly presses the baffle plate 8 downward, and after the baffle plate 8 contacts the contact portion 36 of the clamping protrusion 35, it pushes the clamping plate 33 inward, and the second spring 34 is compressed and deformed at this time; when the press-fitting is completed, the baffle plate 8 drops below the clamping protrusion 35, and the second spring 34 drives the clamping plate 33 to reset, and the baffle plate 8 is clamped at the bottom of the clamping protrusion 35. The rotating plate 3 drives the pressed product to rotate to the third station for inspection. Under the limiting effect of the clamping protrusion 35, the product will not be pushed up or tilted, thereby improving the accuracy of the inspection result.

[0047] The extension plate 37 is fixed to the side of the clamping plate 33 away from the baffle 8, and the contact column 38 is fixed to the inner side of the extension plate 37 and cooperates with the guide plate 41 of the reset mechanism to unlock the baffle 8. After unlocking, the carrier plate 10 is pushed to the original position by the first spring 29. During the reset process of the carrier plate 10, the connecting plate 14 and the plug-in bracket 15 are also reset under the action of the spring, which is convenient for the press-fitting of the next product.

[0048] The reset mechanism includes a fixed column 39, a fixed plate 40, a guide plate 41 and a contact arc 42. The fixed column 39 is fixed to the top of the bottom plate 1 and passes through the rotating plate 3, so when the rotating plate 3 rotates, the fixed column 39 is stationary (the rotating drive member 2 is a commercially available NJ60-5C hollow rotating platform to avoid the position of the fixed column 39).

[0049] like Figure 6As shown, the fixed disk 40 is fixed on the top of the fixed column 39, the guide plate 41 is fixed on the top of the fixed disk 40, the contact arc 42 is arranged on the inner side of the guide plate 41, and the arc trajectory of the contact arc 42 gradually approaches the center of the fixed disk 40, that is, the thickness of the guide plate 41 gradually increases.

[0050] After the press-fitting assembly of the second station presses the ear 43 onto the pressing sheet 45, the baffle 8 is clamped on the inner side of the clamping protrusion 35, and the rotating plate 3 drives the product to rotate to the third and fourth stations. After testing and unloading, the rotating plate 3 continues to rotate toward the first station. At this time, the contact column 38 is against the contact arc 42 of the guide plate 41. As the rotating plate 3 rotates, the contact column 38 gradually moves toward the center of the fixed disk 40, driving the clamping plate 33 to rotate toward the center of the fixed disk 40. At this time, the second spring 34 is compressed, and the clamping protrusion 35 leaves the baffle 8. Under the action of the first spring 29, the carrier plate 10 is reset. Then the contact column 38 is separated from the guide plate 41, and under the action of the second spring 34, the clamping plate 33 is also reset, which is convenient for the press-fitting of the next product.

[0051] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A press-fit structure with self-resetting function, characterized in that: It includes: A support assembly, the support assembly comprising a base plate (1) and a rotating plate (3) rotatably mounted on the top of the base plate (1); A bearing assembly is arranged in a ring on the top of the rotating plate (3), the bearing assembly comprises an adjustment plate (9) elastically arranged on the top of the rotating plate (3), a carrier plate (10) fixed on the top of the adjustment plate (9), a carrier groove (11) provided on the top of the carrier plate (10), and a plug-in rack (15) elastically arranged on the top of the rotating plate (3), the plug-in rack (15) being slidably connected to the adjustment plate (9); A press-fitting assembly, the press-fitting assembly comprising a press-fitting frame (22) fixed on the top of the base plate (1) and a press plate (27) arranged on one side of the press-fitting frame (22) in a liftable manner; A reset assembly, the reset assembly comprising a turntable (30) fixed to the top of the turntable (3), a locking mechanism arranged around the top of the turntable (30), and a reset mechanism arranged inside the locking mechanism, the locking mechanism being used to lock the adjustment plate (9) after being pressed, and the reset mechanism being used to unlock the adjustment plate (9) after being locked.

2. A press-fit structure with self-resetting function according to claim 1, characterized in that: The bearing assembly further comprises a fixing rod (6) fixed on the top of the rotating plate (3), a baffle plate (8) sleeved on the fixing rod (6) and fixed to the adjusting plate (9), a first spring (29) sleeved on the fixing rod (6), and an anti-slip plate (7) fixed on the top of the fixing rod (6), the two sides of the first spring (29) respectively abutting between the rotating plate (3) and the baffle plate (8), and the diameter of the anti-slip plate (7) is greater than the diameter of the fixing rod (6).

3. The press-fit structure with self-resetting function according to claim 1, characterized in that: The bearing assembly further comprises a connecting plate (14) slidably connected to one side of the adjusting plate (9), a fixing plate (16) fixed to one side of the connecting plate (14), a guide plate (17) fixed to the top of the rotating plate (3), a spring arranged between the fixing plate (16) and the guide plate (17), and an upper top column (18) fixed to the bottom of the fixing plate (16) and passing through the guide plate (17) and the rotating plate (3); the plug-in frame (15) is fixed to one side of the connecting plate (14).

4. A press-fit structure with self-resetting function according to claim 3, characterized in that: The press-fitting assembly further comprises a support column (19) fixed on the top of the rotating plate (3) and a lower top plate (20) fixed on the top of the support column (19); when the press-fitting assembly is press-fitted, the upper top column (18) descends and abuts against the top of the lower top plate (20).

5. The press-fit structure with self-resetting function according to claim 2, characterized in that: The locking mechanism comprises a pivot plate (31) fixed at intervals on the top of the turntable (30), a clamping plate (33) rotatably mounted between the pivot plates (31), a clamping protrusion (35) integrally connected to the top of the clamping plate (33), a contact portion (36) obliquely arranged on the top of the clamping protrusion (35), a backing plate (32) fixed on the inner side of the pivot plate (31), and a second spring (34) fixed between the backing plate (32) and the clamping plate (33); when the press-fitting assembly is press-fitted, the baffle (8) is clamped on the bottom of the clamping protrusion (35).

6. A press-fit structure with self-resetting function according to claim 5, characterized in that: The clamping mechanism further comprises an extension plate (37) fixed on the clamping plate (33) and extending towards a side away from the baffle plate (8), and a contact column (38) fixed at the bottom of the extension plate (37).

7. A press-fit structure with self-resetting function according to claim 6, characterized in that: The reset mechanism comprises a fixed column (39) fixed on the bottom plate (1) and passing through the rotating plate (3) and the rotating table (30), a fixed plate (40) fixed on the top of the fixed column (39), a guide plate (41) integrally connected to the top of the fixed plate (40), and a contact arc (42) arranged on the inner side of the guide plate (41); when the rotating plate (3) rotates, the contact column (38) abuts against the contact arc (42), forcing the clamping plate (33) to rotate inward to unlock the baffle (8).

8. The press-fit structure with self-resetting function according to claim 1, characterized in that: The press-fitting assembly further comprises a second slide rail (24) fixed to one side of the press-fitting frame (22), a second slider (25) slidably mounted on the second slide rail (24), and a lifting plate (26) fixed to the second slider (25), wherein the lifting plate (26) is fixed to the pressing plate (27).

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