Continuous stamping device for automobile damping sheet

Abstract

The invention discloses a continuous stamping device for an automobile damping piece, which comprises two fixing plates, supporting legs, a punch, a female die and a conveying device, the upper ends of the two fixing plates are fixedly connected with a first connecting frame, a first screw rod is fixedly connected in the first connecting frame, and the first screw rod is in threaded connection with a sliding seat; the device has the beneficial effects that the turnover bearing seat is arranged to be matched with a first air pump, a connecting pipe and an air hole on the pressing plate, so that the idle female die can be in an unfolded state, chippings in the female die can be conveniently cleaned, meanwhile, through an air collecting pipe, an air outlet hole and a blocking net, the chippings in the female die can be conveniently removed, and the working efficiency is improved. Auxiliary scrap cleaning can be provided on the bottom side of the bearing seat, a balance plate, a base plate and a pressing roller which can rotate are arranged on one side of the bearing seat to be matched with a linear driver and a pressing cutter, pressure can be provided for punched waste, the waste is promoted to be flat, then cutting is conducted, and the waste can be conveniently collected.

Description

Technical Field

[0001] The invention relates to the field of processing and producing automobile shock-absorbing plates, in particular to a continuous punching device for automobile shock-absorbing plates. Background Art

[0002] Automobile shock absorber is a key component in the automobile shock absorption system. It is usually used to suppress the shock when the spring rebounds after shock absorption and the impact from the road to ensure the smooth driving of the vehicle. The shock absorber has a circular or annular structure and realizes the shock absorption function through the design of center hole, concave and convex surface, reinforcing ribs, etc. Automobile shock absorber needs to use special steel plate as raw material when stamping. Special stamping machinery is needed during stamping to make the steel plate plastically deform or separate in the mold.

[0003] During the continuous stamping process, automobile shock absorbers will gradually produce debris due to issues such as material hardness and stamping parameters. Some debris will be stuck in the stamping groove, which will cause the subsequent stamping yield to decrease and affect the continuous stamping efficiency. At the same time, the sheet used for automobile shock absorbers will produce waste after stamping. The continuous movement of the waste will affect the stability of the sheet during stamping and lead to an increase in stamping debris.

[0004] Therefore, a continuous stamping device for automobile shock-absorbing plates is proposed to solve the problem that debris in the die is stuck in the stamping groove and stamping waste will affect the stability of the plate during stamping during the above-mentioned continuous stamping process. Summary of the invention

[0005] The purpose of the present invention is to provide a continuous stamping device for automobile shock absorbers. First, by arranging a first air pump on both sides of the bottom end of the pressing plate in conjunction with an air collecting pipe and an air outlet, the depression of the die can be expanded when the punch contacts one of the dies, thereby cleaning the debris in the die. At the same time, the waste of the parts to be stamped after stamping passes through a balance plate, a pressure roller and a pressure knife, and in conjunction with the depression, it is convenient to guide the waste. At the same time, the waste is cut into small pieces and in conjunction with the groove cut by the punch, the waste can be further cut into debris, which can facilitate waste collection, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a continuous stamping device for automobile shock-absorbing plates, comprising a fixed plate, a leg, a punch, a die and a conveying device, wherein two fixed plates are provided, the upper ends of the two fixed plates are fixedly connected to a first connecting frame, a first screw rod is fixedly connected inside the first connecting frame, a slide seat is threadedly connected to the first screw rod, a hydraulic push rod is fixedly connected to the bottom end of the slide seat, a pressure plate is fixedly connected to the bottom end of the hydraulic push rod, a secondary push rod is fixedly connected to the center of the bottom end of the pressure plate, and the bottom end of the secondary push rod is fixedly connected to Connect the punch, the punch is fixedly connected to the center of the bottom end of the pressing plate, one side of the fixed plate is fixedly connected to the first motor, the output end of the first motor is fixedly connected to the rotating rod, the rotating rod is rotatably connected to the receiving seat, the edge of the receiving seat is an arc-shaped structure, the three concave molds are provided and are all located on the receiving seat, both sides of the upper end of the pressing plate are fixedly connected to the air pump, the output end of the air pump is fixedly connected to the connecting tube, the connecting tube corresponds to the concave mold, the bottom side of the connecting tube is evenly opened with air holes, and the connecting tube is fixedly connected to a buffer sheet located at the bottom side of the air hole;

[0007] A second air pump is fixedly connected to the bottom side of one of the fixed plates, an output end of the second air pump is fixedly connected to an air collecting pipe, an upper end of the air collecting pipe is evenly provided with air outlet holes, and the air outlet holes correspond to the flipping of the concave mold;

[0008] A connecting plate is fixedly connected to one side of the fixed plate, a recess is opened on the connecting plate, a pressing knife is arranged on the upper side of the recess, a linear driver is fixedly connected to the upper side of the pressing knife, and the upper end of the linear driver is fixedly connected to the bottom side of the second connecting frame.

[0009] In a further embodiment, the fixed plate is located on the upper side of the conveying device and is fixedly connected to a second connecting frame, one side of the second connecting frame is rotatably connected to a bidirectional screw rod, both sides of the bidirectional screw rod that are far away from each other are threadedly connected to moving columns, and the bottom end of the moving column is rotatably connected to a contact plate via a first rotating shaft. By setting a bidirectional screw rod to drive the moving column and the contact plate to move relative to each other, the stamping parts to be stamped can be limited.

[0010] In a further embodiment, a pressure rod is threadedly connected to the second connecting frame and the first connecting frame, the bottom end of the pressure rod is rotatably connected to a connecting frame, and the bottom end of the connecting frame is rotatably connected to a pulley. By providing a connecting frame and pulley with adjustable height, the conveying device can be cooperated to guide the stamping parts.

[0011] In a further embodiment, the bottom side of the receiving seat is in contact with a blocking net, the blocking net is an arc-shaped structure, and the blocking net is in contact with a fixed plate. By providing the blocking net and the fixed plate, debris can be prevented from directly contacting the air collecting pipe and the air outlet.

[0012] In a further embodiment, buffer blocks are fixedly connected on both sides of the bottom end of the baffle net, an electric push rod is fixedly connected to the bottom end of the buffer block, a support bar is fixedly connected to the bottom end of the electric push rod, and the support bar is fixedly connected to the bottom side of the fixed plate. By arranging the electric push rod and the buffer block in conjunction with the baffle net, an auxiliary cleaning function can be provided.

[0013] In a further embodiment, a cavity is opened in the buffer block, the output end of the electric push rod is fixedly connected to a movable plate, a spring is sleeved on the bottom side of the movable plate and the spring is located in the cavity, and the buffer block is provided to reduce collision damage to the equipment.

[0014] In a further embodiment, an electric telescopic rod is fixedly connected to one side of the fixed plate, and a card block is fixedly connected to the output end of the electric telescopic rod. The card block is inserted into a limiting groove, and the limiting groove is located on the receiving seat. When the card block is inserted into the limiting groove, the center line of the card block corresponds to the gap formed by the receiving seat and the fixed plate. By setting the electric telescopic rod to drive the card block to be inserted into the limiting groove, it can cooperate with the first motor and the rotating rod to improve the stability of the receiving seat.

[0015] In a further embodiment, one side of the fixed plate is rotatably connected to a balance plate via a second rotating shaft, a torsion spring is sleeved on the second rotating shaft, and the balance plate is located between the receiving seat and the conveying device. By setting the balance plate, it can be ensured that the waste material of the stamping part after cutting can be moved to the side of the pressing knife.

[0016] In a further embodiment, a pad is fixedly connected to one side of the fixed plate, the pad is in contact with a conveying device, the upper side of the conveying device is in contact with a pressure roller, and the pressure roller is rotatably connected in the second connecting frame. By arranging the pad to cooperate with the pressure roller, the cut waste can be crushed, thereby facilitating cutting by the cutter.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) By setting a reversible receiving seat, then cooperating with a punch and three dies, and cooperating with two conveying devices, the receiving seat automatically flips after the stamping is completed, thereby facilitating the unloading of stamped parts;

[0019] (2) By providing a reversible receiving seat in conjunction with the first air pump, the connecting pipe and the air hole on the pressure plate, the idle die can be placed in an unfolded state, thereby facilitating the cleaning of debris in the die. At the same time, the air collecting pipe and the air outlet, in conjunction with the baffle, can provide auxiliary cleaning of debris on the bottom side of the receiving seat;

[0020] (3) By arranging a rotatable balance plate, a pad and a pressure roller on one side of the receiving seat in conjunction with a linear drive and a pressure knife, pressure can be provided to the waste after punching, so that the waste can be flattened and then cut, making it easier to collect the waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 It is a side cross-sectional structural diagram of the present invention;

[0023] Figure 3 It is a side structural diagram of the pressing plate of the present invention;

[0024] Figure 4 It is a three-dimensional structural diagram of the receiving seat of the present invention;

[0025] Figure 5 It is a side cross-sectional structural diagram of the buffer block of the present invention.

[0026] In the figure: 1, fixed plate; 2, support leg; 3, first connecting frame; 4, first screw rod; 5, slide seat; 6, hydraulic push rod; 7, pressure plate; 8, punch; 9, rotating rod; 10, receiving seat; 11, die; 12, first air pump; 13, connecting pipe; 14, air hole; 15, conveying device; 16, second connecting frame; 17, two-way screw rod; 18, moving column; 19, contact plate; 20, pressure rod; 21, connecting frame; 22, second air pump; 23, air collecting pipe; 24, air outlet; 25, support bar; 26, electric push rod; 27, buffer block; 28, baffle; 29, electric telescopic rod; 30, block; 31, limit groove; 32, second rotating shaft; 33, balance plate; 34, linear drive; 35, press knife; 36, connecting plate; 37, depression; 38, pad; 39, pressure roller. DETAILED DESCRIPTION

[0027] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1

[0029] During the actual stamping process of the automobile shock-absorbing sheet, some debris will be stuck in the die 11, causing problems in the stamping process and affecting the continuous stamping efficiency.

[0030] See also Figure 1-5The present embodiment provides a continuous punching device for automobile shock-absorbing plates, comprising a fixed plate 1, a leg 2, a punch 8, a die 11 and a conveying device 15. The conveying belt used by the conveying device 15 is an iron sheet conveying belt. Two fixed plates 1 are provided. The upper ends of the two fixed plates 1 are fixedly connected with a first connecting frame 3. The slide 5 moves on the first screw rod 4, which can drive the slide 5 to move. Then, the hydraulic push rod 6 is extended and the pressing plate 7 is moved downward, so that the punch 8 contacts the die 11 to complete the cutting. At the same time, the pressing plate 7 is moved horizontally to cooperate with the pressing plate 7. The vertical movement of the conveying device 15 can adjust the position of the stamping position on the part to be stamped, so that the stamping position can be brought closer and the utilization rate of the material can be improved. The first connecting frame 3 is fixedly connected with the first screw rod 4, and the first screw rod 4 is threadedly connected with a slide seat 5. The bottom end of the slide seat 5 is fixedly connected with a hydraulic push rod 6, and the bottom end of the hydraulic push rod 6 is fixedly connected with a pressing plate 7. The center of the bottom end of the pressing plate 7 is fixedly connected with a secondary push rod, and the bottom end of the secondary push rod is fixedly connected with a punch 8. The secondary push rod is an electrically retractable rod. When the secondary push rod contracts, the punch 8 will squeeze the idle die. 11, the punch 8 is fixedly connected to the center of the bottom end of the pressing plate 7, one side of one of the fixed plates 1 is fixedly connected to the first motor, the first motor drives the rotating rod 9 to rotate, and can cause the receiving seat 10 to flip. After the stamping is completed, the stamping parts can be caused to fall by flipping, and batch collection can be achieved by placing a collection structure. The output end of the first motor is fixedly connected to the rotating rod 9, and the receiving seat 10 is rotatably connected to the rotating rod 9. The edge of the receiving seat 10 is an arc-shaped structure. Three concave dies 11 are provided and are all located on the receiving seat 10. Both sides of the upper end of the pressing plate 7 are fixedly connected The first air pump 12 extracts gas and cooperates with the connecting pipe 13 to be inserted into the idle die 11, so that the die 11 can be in a contracted state, so that the debris in the die 11 can be purged through the air holes 14 to achieve a cleaning effect. The output end of the first air pump 12 is fixedly connected with the connecting pipe 13, the connecting pipe 13 corresponds to the die 11, and the bottom side of the connecting pipe 13 is evenly provided with air holes 14. The connecting pipe 13 is located at the bottom side of the air holes 14 and is fixedly connected with a buffer sheet, which can provide contact adaptability between the connecting pipe 13 and the die 11;

[0031] A second air pump 22 is fixedly connected to the bottom side of one of the fixed plates 1, and an air collecting pipe 23 is fixedly connected to the output end of the second air pump 22. Air outlet holes 24 are evenly opened on the upper end of the air collecting pipe 23, and the air outlet holes 24 correspond to the flipping of the die 11. The second air pump 22 extracts external environmental gas through the air collecting pipe 23 and the air outlet holes 24, and can assist in blowing the die 11 when the receiving seat 10 is completely flipped, thereby improving the chip removal effect;

[0032] A connecting plate 36 is fixedly connected to one side of the fixed plate 1, and a recess 37 is opened on the connecting plate 36. A pressing knife 35 is arranged on the upper side of the recess 37. A linear drive 34 is fixedly connected to the upper side of the pressing knife 35. The upper end of the linear drive 34 is fixedly connected to the bottom side of the second connecting frame 16. The operation of the linear drive 34 can drive the pressing knife 35 to be pressed downward. When the waste of the stamping part moves to the recess 37, it can be cut, which is convenient for collecting the cut waste.

[0033] The fixed plate 1 is located on the upper side of the conveying device 15 and is fixedly connected to a second connecting frame 16. A bidirectional screw rod 17 is rotatably connected to one side of the second connecting frame 16. Moving columns 18 are threadedly connected on both sides of the bidirectional screw rod 17 that are away from each other. The bottom end of the moving column 18 is rotatably connected to a contact plate 19 via a first rotating shaft. By rotating the bidirectional screw rod 17, the contact plate 19 can be driven to be limited at the edge of the part to be stamped, thereby facilitating the movement of the part to be stamped.

[0034] The second connecting frame 16 is threadedly connected to the first connecting frame 3 with a pressure rod 20, the bottom end of the pressure rod 20 is rotatably connected to a connecting frame 21, and the bottom end of the connecting frame 21 is rotatably connected to a pulley. By rotating the pressure rod 20, the pulley on the bottom side of the connecting frame 21 is driven to contact the workpiece to be stamped, thereby cooperating with the conveying device 15 to facilitate the movement of the workpiece to be stamped.

[0035] Place the workpiece to be stamped on the fixed plate 1 and the conveying device 15, then rotate the adjusting pressure rod 20 to make the pulley contact the upper surface of the workpiece to be stamped, and then adjust the two-way screw 17 to drive the two contact plates 19 to move relative to each other and limit them on both sides of the workpiece to be stamped. At this time, the workpiece to be stamped continues to move and moves to the upper side of the receiving seat 10, and then the first screw 4 drives the slide seat 5 to move horizontally, and the hydraulic push rod 6 extends to make the punch 8 correspond to one of the concave dies 11, and then the stamping operation of the workpiece to be stamped is realized. After stamping, the receiving seat 10 is turned clockwise (from Figure 1 The automobile shock absorber falls, and the downward movement of the pressure plate 7 drives the punch 8 and the connecting tube 13 to move downward, and the secondary push rod can control the extension and contraction of the punch 8. The secondary push rod gradually contracts during the stamping process, which makes the connecting tube 13 gradually squeeze the idle die 11, so that the die 11 is in an open state, and the first air pump 12 extracts gas through the connecting tube 13 and the air hole 14 to guide the air flow, and blows away the stamping debris in the die 11, and then the stamped waste parts to be stamped pass through the balance plate 33 and fall to the right conveyor 15 ( Figure 1 ), at this time, the pad 38 cooperates with the pressure roller 39 to roll the raised waste material to be stamped, so that it is gradually flattened, and then the extension of the linear drive 34 drives the pressure knife 35 to cut the waste material, and the waste material is gradually broken into small pieces, so as to achieve the effect of facilitating collection.

[0036] When the receiving seat 10 is turned over, part of the stamping debris will gradually fall down as the receiving seat 10 tilts, and there is a certain probability that it will contact the air outlet 24 at the bottom side of the receiving seat 10, causing blockage.

[0037] See also Figure 1-5 , further improvements are made on the basis of Example 1.

[0038] The bottom side of the receiving seat 10 is in contact with a blocking net 28, which is an arc-shaped structure. The mesh size of the blocking net 28 is smaller than the particle size of the stamping debris. The blocking net 28 is in contact with the fixed plate 1. By setting the blocking net 28, the stamping debris can be prevented from directly contacting the air outlet 24.

[0039] Buffer blocks 27 are fixedly connected to both sides of the bottom end of the baffle net 28, an electric push rod 26 is fixedly connected to the bottom end of the buffer block 27, a support bar 25 is fixedly connected to the bottom end of the electric push rod 26, and the support bar 25 is fixedly connected to the bottom side of the fixed plate 1. By arranging the electric push rod 26 to drive the buffer block 27 and the baffle net 28, slight vibration can be provided to prevent debris from clogging the baffle net 28.

[0040] A cavity is provided in the buffer block 27, and a movable plate is fixedly connected to the output end of the electric push rod 26. A spring is sleeved on the bottom side of the movable plate and is located in the cavity. By providing the buffer block 27, damage caused by collision of the equipment can be reduced.

[0041] The waste of the stamped parts will bend after stamping, which will cause trouble in the subsequent waste collection and make the waste collection more difficult.

[0042] See also Figure 1-5 , further improvements are made on the basis of Example 1.

[0043] An electric telescopic rod 29 is fixedly connected to one side of the fixed plate 1, and a clamping block 30 is fixedly connected to the output end of the electric telescopic rod 29. The clamping block 30 is inserted into a limiting groove 31, and the limiting groove 31 is located on the receiving seat 10. When the clamping block 30 is inserted into the limiting groove 31, the center line of the clamping block 30 corresponds to the gap formed by the receiving seat 10 and the fixed plate 1. When the stamping operation is performed on the part to be stamped, the electric telescopic rod 29 will extend and allow the clamping block 30 to be inserted into the limiting groove 31, thereby improving the stability of the receiving seat 10.

[0044] One side of the fixed plate 1 is rotatably connected to a balance plate 33 via a second rotating shaft 32, and a torsion spring is sleeved on the second rotating shaft 32. The balance plate 33 is located between the receiving seat 10 and the conveying device 15. By setting the balance plate 33, the stamped parts can continue to move smoothly after being stamped, which is convenient for subsequent cutting.

[0045] A pad 38 is fixedly connected to one side of the fixed plate 1, and the pad 38 contacts the conveying device 15. The upper side of the conveying device 15 contacts a pressure roller 39, and the pressure roller 39 is rotatably connected in the second connecting frame 16. By arranging the pressure roller 39 in conjunction with the pad 38, the punched waste can be rolled, which can facilitate subsequent smooth cutting.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous punching device for automobile shock-absorbing plates, comprising a fixed plate (1), a leg (2), a punch (8), a die (11) and a conveying device (15), wherein two fixed plates (1) are provided, and characterized in that: The upper ends of the two fixed plates (1) are fixedly connected to a first connecting frame (3), a first screw rod (4) is fixedly connected inside the first connecting frame (3), a slide seat (5) is threadedly connected to the first screw rod (4), a hydraulic push rod (6) is fixedly connected to the bottom end of the slide seat (5), a pressure plate (7) is fixedly connected to the bottom end of the hydraulic push rod (6), a secondary push rod is fixedly connected to the center of the bottom end of the pressure plate (7), and a punch (8) is fixedly connected to the bottom end of the secondary push rod, and a first motor is fixedly connected to one side of one of the fixed plates (1), and an output end of the first motor is fixedly connected to A rotating rod (9), the rotating rod (9) is rotatably connected to a receiving seat (10), the edge of the receiving seat (10) is an arc-shaped structure, three concave dies (11) are provided and are all located on the receiving seat (10), both sides of the upper end of the pressing plate (7) are fixedly connected to a first air pump (12), the output end of the first air pump (12) is fixedly connected to a connecting pipe (13), the connecting pipe (13) corresponds to the concave die (11), the bottom side of the connecting pipe (13) is evenly provided with air holes (14), and the connecting pipe (13) is fixedly connected to a buffer sheet located at the bottom side of the air hole (14); A second air pump (22) is fixedly connected to the bottom side of one of the fixed plates (1); an output end of the second air pump (22) is fixedly connected to an air collecting pipe (23); an upper end of the air collecting pipe (23) is evenly provided with air outlet holes (24) and the air outlet holes (24) correspond to the concave mold (11) when it is turned over; A connecting plate (36) is fixedly connected to one side of the fixed plate (1), a recess (37) is provided on the connecting plate (36), a pressing knife (35) is arranged on the upper side of the recess (37), a linear drive (34) is fixedly connected to the upper side of the pressing knife (35), and the upper end of the linear drive (34) is fixedly connected to the bottom side of the second connecting frame (16).

2. A continuous punching device for automobile shock-absorbing sheets according to claim 1, characterized in that: The fixed plate (1) is located on the upper side of the conveying device (15) and is fixedly connected to a second connecting frame (16); one side of the second connecting frame (16) is rotatably connected to a bidirectional screw rod (17); two sides of the bidirectional screw rod (17) that are away from each other are threadedly connected to movable columns (18); the bottom end of the movable column (18) is rotatably connected to a contact plate (19) via a first rotating shaft.

3. A continuous punching device for automobile shock-absorbing sheets according to claim 2, characterized in that: A pressure rod (20) is threadedly connected to the second connecting frame (16) and the first connecting frame (3); the bottom end of the pressure rod (20) is rotatably connected to a connecting frame (21); and the bottom end of the connecting frame (21) is rotatably connected to a pulley.

4. A continuous punching device for automobile shock-absorbing sheets according to claim 1, characterized in that: The bottom side of the receiving seat (10) is in contact with a blocking net (28), the blocking net (28) is in an arc-shaped structure, and the blocking net (28) is in contact with the fixing plate (1).

5. A continuous punching device for automobile shock-absorbing sheets according to claim 4, characterized in that: Buffer blocks (27) are fixedly connected to both sides of the bottom end of the blocking net (28), the bottom end of the buffer block (27) is fixedly connected to an electric push rod (26), the bottom end of the electric push rod (26) is fixedly connected to a support bar (25), and the support bar (25) is fixedly connected to the bottom side of the fixed plate (1).

6. A continuous punching device for automobile shock-absorbing sheets according to claim 5, characterized in that: A cavity is provided in the buffer block (27); the output end of the electric push rod (26) is fixedly connected to a moving plate; a spring is sleeved on the bottom side of the moving plate and the spring is located in the cavity.

7. A continuous punching device for automobile shock-absorbing sheets according to claim 5, characterized in that: An electric telescopic rod (29) is fixedly connected to one side of the fixed plate (1); a clamping block (30) is fixedly connected to the output end of the electric telescopic rod (29); the clamping block (30) is plugged into a limiting groove (31); the limiting groove (31) is located on the receiving seat (10); when the clamping block (30) is plugged into the limiting groove (31), the center line of the clamping block (30) corresponds to a gap formed between the receiving seat (10) and the fixed plate (1).

8. A continuous punching device for automobile shock-absorbing sheets according to claim 7, characterized in that: One side of the fixed plate (1) is rotatably connected to a balancing plate (33) via a second rotating shaft (32), a torsion spring is sleeved on the second rotating shaft (32), and the balancing plate (33) is located between the receiving seat (10) and the conveying device (15).

9. A continuous punching device for automobile shock-absorbing sheets according to claim 8, characterized in that: A pad (38) is fixedly connected to one side of the fixed plate (1), the pad (38) is in contact with the conveying device (15), the upper side of the conveying device (15) is in contact with a pressure roller (39), and the pressure roller (39) is rotatably connected in the second connection frame (16).

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