CN110497518B

CN110497518B - Suspension roller type cement pipe making machine

Info

Publication number: CN110497518B
Application number: CN201910786454.9A
Authority: CN
Inventors: 董延
Original assignee: Tangshan Fengnan Liyuan Cement Products Co ltd
Current assignee: Tangshan Fengnan Liyuan Cement Products Co ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-12-08
Anticipated expiration: 2039-08-23
Also published as: CN110497518A

Abstract

The invention relates to a suspension roll type cement pipe making machine, which relates to the technical field of cement pipe making machines and comprises a rack, a door frame, a suspension roll shaft and a driving shaft, wherein one end of the suspension roll shaft is connected with the driving shaft through a flange plate, the other end of the suspension roll shaft is rotatably connected with the door frame, the driving shaft is installed on the rack through a shaft supporting seat, the suspension roll type cement pipe making machine also comprises a pressing device fixedly installed on the rack, the pressing device comprises a bottom plate, a driving mechanism and a pressing plate installed on the driving mechanism, the pressing plate is arranged above one end, far away from the suspension roll shaft, of the driving shaft, the driving mechanism is installed on. The invention has the effect of controlling the suspension roller shaft to be in a horizontal state.

Description

Suspension roller type cement pipe making machine

Technical Field

The invention relates to the technical field of cement pipe making machines, in particular to a suspension roller type cement pipe making machine.

Background

The existing cement pipe-making machine can be divided into a suspension-roll type cement pipe-making machine and a centrifugal type cement pipe-making machine according to the structural form, wherein the suspension-roll type cement pipe-making machine comprises a main motor, a transmission mechanism, a feeding mechanism, a main frame, a main transmission shaft, a rod shaft, a movable door frame and other components.

The prior Chinese patent with publication number CN206351491U discloses a suspension roll type cement pipe making machine, which comprises a frame, a suspension roll shaft and a portal; the rack comprises a support column and a fixed beam; one end of the fixed beam is fixedly connected with the support column, the other end of the fixed beam is a free end, and a free filler area is formed on one side of the free end; one end of the suspension roll shaft is arranged below the fixed beam and is rotationally connected with the fixed beam; the other end of the suspension roller shaft is rotatably connected with the door frame; the frame is provided with a driving device, and the driving device is in transmission connection with the suspension roller shaft.

When an outer die of a gantry is opened and installed, one end of a suspension roller shaft close to the gantry is in a suspended state, a tail end supporting seat is not enough to bear the weight of the suspension roller shaft, and one end of the suspension roller shaft close to the gantry can hang downwards due to gravity.

Disclosure of Invention

The invention aims to provide a suspension roll type cement pipe making machine which has the effect of controlling a suspension roll shaft to be in a horizontal state.

The above object of the present invention is achieved by the following technical solutions: the utility model provides a roll-type cement tuber, which comprises a frame, the portal, hang the roller, the driving shaft, it links to each other with the driving shaft to hang roller one end through the ring flange, the roll-type other end of hanging roller rotates with the portal to be connected, the driving shaft passes through a supporting seat and installs in the frame, roll-type cement tuber still includes the push down device of fixed mounting in the frame, the push down device includes the bottom plate, actuating mechanism and the clamp plate of installing in actuating mechanism, the top of roll axle one end is kept away from at the driving shaft to the clamp plate setting, actuating mechanism installs on the bottom plate, the bottom plate.

Through adopting above-mentioned technical scheme, when opening the portal, the one end that the overhang roll axle is close to the portal is unsettled state, utilizes actuating mechanism to drive the clamp plate, makes clamp plate and driving shaft contact, and the clamp plate gives a decurrent power of driving shaft, and the driving shaft uses the axle supporting seat as the fulcrum, and because of the other end fixedly connected with of driving shaft hangs the roller axle, when the clamp plate pushes down the one end that the driving shaft kept away from hanging the roller axle, the overhang roll axle can use the axle supporting seat to upwards squint certain angle as the fulcrum, and the control is hung the roller axle and is in.

The invention is further configured to: the driving mechanism is a hydraulic cylinder, the hydraulic cylinder is installed on the bottom plate, and the pressing plate is installed on a piston rod of the hydraulic cylinder.

Through adopting above-mentioned technical scheme, the pneumatic cylinder can drive the clamp plate and move together, through control pneumatic cylinder piston rod extension length, can adjust the degree that the clamp plate pushed down the driving shaft, makes and hangs the roller and uses axle supporting seat as the fulcrum upwards squint, and the control is hung the roller and is in the horizontality.

The invention is further configured to: the top end of the piston rod is provided with threads, and a sleeve is fixed above the pressing plate and is in threaded connection with the piston rod.

Through adopting above-mentioned technical scheme, the clamp plate passes through sleeve threaded connection and installs on the piston rod, when the clamp plate damaged, can follow the piston rod and unscrew, conveniently changes the clamp plate.

The invention is further configured to: one side of the pressing plate, which is far away from the pressing device, is arc-shaped.

Through adopting above-mentioned technical scheme, when the clamp plate contact driving shaft, the arc can increase the area that clamp plate and driving shaft contacted, can let the more stable effort of applying to the driving shaft of clamp plate.

The invention is further configured to: and a rubber gasket is fixed on the arc-shaped surface of the pressing plate.

Through adopting above-mentioned technical scheme, when the clamp plate contacts the driving shaft, the clamp plate passes through rubber gasket and driving shaft contact, prevents the clamp plate direct contact driving shaft, reduces the possibility that the driving shaft is destroyed by the clamp plate.

The invention is further configured to: the portal comprises a portal base and a portal upper beam, the portal upper beam is divided into a rotating end and a free end, the free end is provided with a groove, the rotating end is rotatably connected to the portal base, when the portal is closed, the groove of the free end covers the portal base, and the free end is connected with the portal base in a locking mode through a locking device.

By adopting the technical scheme, when the portal is closed, the free end covers the portal base, and the locking device is used for locking the free end on the portal base, so that the safety is improved.

The invention is further configured to: the locking device comprises bolt holes formed in the two sides of the free end of the upper cross beam of the portal frame and the portal frame base and further comprises a bolt which sequentially penetrates through the free end of the upper cross beam of the fixed portal frame and the bolt holes in the portal frame base, the bolt is provided with a bolt cap, and a bolt handle is arranged on the bolt cap.

Through adopting above-mentioned technical scheme, when opening or closing the portal, operator's accessible bolt handle inserts the bolt or extracts the bolt hole in, makes the operation more convenient.

The invention is further configured to: the suspension roll type cement pipe making machine further comprises a feeding device, the feeding device comprises a stirring machine, an oblique conveying belt is arranged below the stirring machine, a first-stage transverse distribution conveying belt with a bidirectional operation function is arranged below the oblique conveying belt, storage hoppers are respectively arranged below two ends of the first-stage transverse distribution conveying belt, second-stage transverse distribution conveying belts with bidirectional operation and variable-frequency speed regulation functions are also respectively arranged below the two storage hoppers, and longitudinal conveying belts are respectively arranged at two ends of the two second-stage transverse distribution conveying belts.

Through adopting above-mentioned technical scheme, when needing the tubulation, send into the mixer with the concrete, can transport appointed suspension roll formula cement tubulation machine with the earth that mixes as required and carry out the tubulation, the second grade is violently divided the material conveyer belt and can also be controlled the conveying speed of concrete and adjust the feed rate, utilizes a mixer just can provide the concrete for a plurality of suspension roll formula cement tubulation machines.

The invention is further configured to: the driving mechanism is a control motor, the control motor is installed on the bottom plate, a screw rod is connected to the control motor, the screw rod is rotatably connected to the two supporting blocks, a sliding block is connected to the screw rod in a threaded mode, the two sides of the sliding block are provided with supporting rods, the sliding block is connected to the supporting rods in a sliding mode, a push rod is further fixed to the sliding block, and the pressing plate is installed below the push rod.

Through adopting above-mentioned technical scheme, utilize control motor to drive the screw rod rotatory, make the slider upwards or the downward motion along the screw rod, the slider drives the clamp plate motion and contacts with the driving shaft, comes control overhang roll axle to be in the horizontality, and control motor can be more accurate control clamp plate pushes down the driving shaft to more accurate control overhang roll axle is in the horizontality.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the pressing plate presses one end of the driving shaft, which is far away from the suspension roller shaft, downwards, and the suspension roller shaft can deflect upwards by a certain angle by taking the shaft supporting seat as a fulcrum to control the suspension roller shaft to be in a horizontal state;

2. the concrete can be provided for a plurality of suspension roller type cement pipe making machines by using one mixer, and the feeding amount can be controlled, so that the suspension roller type cement pipe making machines can work more efficiently;

3. the groove at the free end of the upper beam of the portal frame can cover the base of the portal frame, and the free end can be connected with the base of the portal frame in a locking way through the locking device, so that the safety can be improved.

Drawings

Fig. 1 is a schematic overall structure diagram of the first embodiment.

FIG. 2 is a schematic view of a feeding device according to a first embodiment.

Fig. 3 is a schematic structural diagram of a pressing device according to the first embodiment.

Fig. 4 is a schematic structural diagram of a pressing device in the first embodiment.

FIG. 5 is a schematic structural diagram of a portal frame in accordance with an embodiment.

FIG. 6 is a schematic structural diagram of an opening door frame in the first embodiment.

Fig. 7 is a schematic structural view of a pressing device in the second embodiment.

In the figure, 1, a frame; 11. a drive motor; 12. a shaft support seat; 13. a belt; 2. a gantry; 21. a gantry base; 22. a gantry upper beam; 221. a rotating end; 222. a free end; 223. a groove; 23. a locking device; 231. a pin hole; 232. a bolt; 233. a latch cap; 234. a latch handle; 3. a suspension roller shaft; 31. a flange plate; 4. a drive shaft; 5. a feeding device; 51. a blender; 52. an oblique conveyor belt; 53. a first-stage transverse distribution conveyor belt; 54. a storage hopper; 55. a secondary transverse distribution conveyor belt; 56. a longitudinal conveyor belt; 6. a pressing device; 61. a base plate; 62. a hydraulic cylinder; 621. a piston rod; 63. pressing a plate; 631. a sleeve; 632. a rubber gasket; 64. controlling the motor; 65. a screw; 651. a support block; 652. a slider; 66. a support bar; 67. a push rod; 7. and (4) bolts.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows: a suspension roll type cement pipe making machine, as shown in fig. 1 and 2, comprises a frame 1, a gantry 2, a suspension roll shaft 3, a driving shaft 4 and a feeding device 5. The upper portion of the frame 1 is fixedly provided with a driving motor 11, the lower portion of the frame 1 is provided with a shaft supporting seat 12, a driving shaft 4 is fixedly installed in the shaft supporting seat 12, the driving shaft 4 rotates through a driving motor 11 linkage belt 13, one end, close to the frame 1, of the suspension roller shaft 3 is fixed on the driving shaft 4 through a flange plate 31, the other end of the suspension roller shaft 3 is rotatably connected with the portal frame 2, and the suspension roller shaft 3 rotates together with the driving shaft 4 to work. The feeding device 5 is arranged outside the suspension roll type cement pipe making machine, and the feeding device 5 can provide concrete for pipe making for the suspension roll type cement pipe making machine.

As shown in fig. 2, the feeding device 5 includes a stirrer 51, an inclined conveyor belt 52 is disposed below the stirrer 51, a first-stage transverse distribution conveyor belt 53 having a bidirectional operation function is disposed below the inclined conveyor belt 52, storage hoppers 54 are disposed below two ends of the first-stage transverse distribution conveyor belt 53, second-stage transverse distribution conveyor belts 55 having bidirectional operation and variable-frequency speed control functions are also disposed below the two storage hoppers 54, longitudinal conveyor belts 56 are disposed at two ends of the two second-stage transverse distribution conveyor belts 55, the longitudinal conveyor belts 56 extend into the suspension roll type cement pipe making machine to supply the suspension roll type cement pipe making machine, and one feeding device 5 can supply four suspension roll type cement pipe making machines.

As shown in fig. 2, when pipe making is required, concrete is fed into a mixer 51, the mixed concrete leaks out of the mixer 51 onto an inclined conveyor belt 52, the inclined conveyor belt 52 conveys the concrete to a primary transverse distribution conveyor belt 53, the conveying direction of the primary transverse distribution conveyor belt 53 can be controlled as required to convey the concrete to one of two storage hoppers 54, the storage hoppers 54 leak the concrete to a secondary transverse distribution conveyor belt 55, the conveying direction of the secondary transverse distribution conveyor belt 55 can be controlled as required to convey the concrete to a designated longitudinal conveyor belt 56, the feeding amount of the concrete can be adjusted by controlling the conveying speed of the concrete by the secondary transverse distribution conveyor belt 55, and the concrete is conveyed into a corresponding suspension roller type cement pipe making machine by the longitudinal conveyor belt 56 to make a pipe.

As shown in fig. 1 and 3, the suspension roll type cement pipe making machine further comprises a pressing device 6 fixed on the frame 1, the pressing device 6 comprises a bottom plate 61, the bottom plate 61 is connected and installed on the frame 1 through a bolt 7, the pressing device 6 further comprises a driving mechanism arranged on the bottom plate 61, the driving mechanism is a hydraulic cylinder 62, the hydraulic cylinder 62 is connected with the bottom plate 61 through the bolt 7, as shown in fig. 4, a pressing plate 63 is fixed on the top end of a piston rod 621 of the hydraulic cylinder 62, a thread is arranged on the top end of the piston rod 621, a sleeve 631 with a thread is arranged above the pressing plate 63, the pressing plate 63 is connected on the piston rod 621 through the thread, the pressing device 6 is arranged above one end of the driving shaft 4 far away from the suspension roll shaft 3, the hydraulic cylinder 62 drives the pressing plate 63 to move downwards through the piston rod 621, the pressing plate 63 is in contact with the driving shaft 4, the suspension roller shaft 3 fixedly connected to the other end of the driving shaft 4 is driven to deflect, so when the pressing plate 63 presses the driving shaft 4 downwards to keep away from one end of the suspension roller shaft 3, the suspension roller shaft 3 can deflect upwards by a certain angle by taking the shaft supporting seat 12 as a fulcrum, the extension length of the piston rod 621 of the control hydraulic cylinder 62 is used for controlling the suspension roller shaft 3 to be in a horizontal state, the contact position of the pressing plate 63 and the driving shaft 4 is semicircular, a semicircular rubber gasket 632 is fixed, and when the pressing plate 63 presses the driving shaft 4 downwards, the pressing plate 63 is in contact with the driving shaft 4 through the rubber gasket 632.

When the door frame 2 is opened, one end, close to the door frame 2, of the suspension roller shaft 3 is in a suspension state, one end, close to the door frame 2, of the suspension roller shaft 3 can hang downwards due to gravity, the piston rod 621 moves downwards by virtue of the hydraulic cylinder 62, the piston rod 621 drives the pressing plate 63 to move downwards, the pressing plate 63 moves downwards to be in contact with the driving shaft 4, the pressing plate 63 gives a downward force to the driving shaft 4, the other end of the driving shaft 4 drives the suspension roller shaft 3 to upwards deviate by a certain angle by taking the shaft supporting seat 12 as a fulcrum, the suspension roller shaft 3 is controlled to be in a horizontal state, after the door frame 2 is closed, one end, close to the door frame 2, of the suspension roller shaft 3 is rotatably connected with the door frame 2, the piston rod 621 of the hydraulic cylinder 62 is controlled to move upwards, the piston.

As shown in fig. 3 and 4, when the parts inside the pressing device 6 need to be repaired and replaced, the pressing device 6 is detached from the frame 1 by screwing down the bolt 7, so that the repair and replacement are convenient, and when the hydraulic cylinder 62 is replaced, the hydraulic cylinder 62 can be detached by screwing down the bolt 7 of the hydraulic cylinder 62 and the bottom plate 61. When the pressing plate 63 is damaged, the piston rod 621 is lifted, the pressing plate 63 is screwed down from the piston rod 621, and a new pressing plate 63 is screwed up from the piston rod 621.

As shown in fig. 5, the portal 2 includes a portal base 21 and a portal upper beam 22, the portal upper beam 22 is divided into a rotating end 221 and a free end 222, the rotating end 221 is rotatably connected with the portal base 21 through a rotating shaft, the free end 222 is provided with a groove 223, when the portal upper beam 22 is closed, the groove 223 is just covered on the portal base 21, the free end 222 can be locked and connected with the portal base 21 through a locking device 23, as shown in fig. 6, the locking device 23 includes a latch hole 231 and a latch 232, the latch hole 231 is arranged at two sides of the portal free end 222, a latch hole 231 is also arranged at a corresponding position of the portal base 21, a latch cap 233 is arranged at the upper end of the latch 232, and a latch handle 234 is arranged on the latch cap 233.

As shown in fig. 6, when the upper cross beam 22 of the door frame needs to be opened, the latch 232 is pulled upwards by the latch handle 234, so that the latch 232 is pulled out of the latch hole 231, and the upper cross beam 22 of the door frame can be opened, and the free end 222 rotates along the rotating end 221, when the upper cross beam 22 of the door frame is closed, the free end 222 of the upper cross beam 22 of the door frame is pushed, so that the free end 222 covers the base 21 of the door frame, and the latch hole 231 corresponds to each other, and the latch 232 sequentially penetrates through the free end 222 of the fixed door frame and the latch hole 231 on the base 21 of the door frame by the latch handle 234, so that the upper cross beam 22 of the.

The implementation principle of the embodiment is as follows: when the portal 2 is opened, the extension length of the piston rod 621 of the hydraulic cylinder 62 is controlled to control the suspension roller shaft 3 to be in a horizontal state, and after the portal 2 is closed, the piston rod 621 of the hydraulic cylinder 62 is controlled to move upwards to enable the pressing plate 63 to be far away from the driving shaft 4, so that the driving shaft 4 is ensured not to be influenced by the pressing plate 63 when rotating. When the upper cross beam 22 of the door frame needs to be opened, the bolt 232 is pulled upwards through the bolt handle 234, so that the bolt 232 is pulled out of the bolt hole 231, the upper cross beam 22 of the door frame can be opened, when the upper cross beam 22 of the door frame is closed, the free end 222 of the upper cross beam 22 of the door frame is pushed, the free end 222 covers the base 21 of the door frame, the bolt holes 231 correspond to each other, and the bolt 232 is inserted, so that the upper cross beam 22 of the door frame can be locked on the base 21 of the door frame. When the pipe is required to be manufactured, concrete is fed into the mixer 51, and the concrete is fed into a designated roll-type cement pipe manufacturing machine through the inclined conveyor belt 52, the primary transverse distribution conveyor belt 53, the storage hopper 54, the secondary transverse distribution conveyor belt 55 and the longitudinal conveyor belt 56 to be manufactured.

Example two: a suspension roll type cement pipe making machine is different from the first embodiment in that as shown in FIG. 7, a pressing device 6 comprises a bottom plate 61 and a driving mechanism installed and fixed on the bottom plate 61, the bottom plate 61 is installed on a frame 1 through a bolt 7 in a connecting manner, the driving mechanism is a control motor 64, the control motor 64 is connected on the bottom plate 61 through a bolt 7, the control motor 64 is connected with a screw 65, two supporting blocks 651 are arranged on the bottom plate 61, the screw 65 is rotatably connected in the two supporting blocks 651, a sliding block 652 is connected on the screw 65 in a threaded manner, a threaded hole is arranged at the middle position of the sliding block 652, supporting rods 66 fixed on the bottom plate 61 are respectively arranged at two sides of the sliding block 652, through holes are arranged at two sides of the sliding block 652, the supporting rods 66 can pass through the through holes on the sliding block 652, the supporting rods 66 can allow the sliding block 652 to, the lower part of the push rod 67 is provided with threads, the upper part of the pressure plate 63 is provided with a sleeve 631 with threads, and the pressure plate 63 is connected to the push rod 67 through the threads.

The control motor 64 drives the pressing plate 63 to move, so that the precision is higher than that of the pressing plate 63 driven by the hydraulic cylinder 62, and the control motor 64 can more accurately control the pressing plate 63 to downwards press the driving shaft 4, so that the more accurate control of the suspension roller shaft 3 is in a horizontal state.

The control motor 64 rotates positively to drive the screw rod 65 to rotate, the screw rod 65 rotates to enable the sliding block 652 to move downwards along the screw rod 65, the sliding block 652 drives the push rod 67 to move downwards, the pressing plate 63 installed on the push rod 67 moves downwards, the pressing plate 63 moves downwards to be in contact with the driving shaft 4, the distance of the downward movement of the pressing plate 63 is controlled more accurately through the control motor 64, the suspension roller shaft 3 is in a horizontal state, and the reverse rotation of the control motor 64 can drive the pressing plate 63 to move upwards to be far away from the driving shaft 4.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a roll-type cement tuber, which comprises a frame (1), portal (2), overhang roll axle (3), driving shaft (4), overhang roll axle (3) one end is passed through ring flange (31) and is linked to each other with driving shaft (4), overhang roll axle (3) other end is rotated with portal (2) and is connected, driving shaft (4) are installed on frame (1) through axle supporting seat (12), a serial communication port, overhang roll type cement tuber still includes push down device (6) of fixed mounting in frame (1), push down device (6) include bottom plate (61), actuating mechanism and install clamp plate (63) on actuating mechanism, clamp plate (63) set up and keep away from the top of overhang roll axle (3) one end in driving shaft (4), actuating mechanism installs on bottom plate (61), install on frame (1) bottom plate (61).

2. A suspended roll type cement pipe making machine according to claim 1, wherein said driving mechanism is a hydraulic cylinder (62), the hydraulic cylinder (62) being mounted on the base plate (61), the pressure plate (63) being mounted on a piston rod (621) of the hydraulic cylinder (62).

3. A suspension type cement pipe making machine according to claim 2, wherein said piston rod (621) is provided with a screw thread at the top end, a sleeve (631) is fixed above said pressure plate (63), and said sleeve (631) is screw-connected with said piston rod (621).

4. A catenary cement pipe mill according to claim 1, characterized in that the pressure plate (63) is curved on the side facing away from the hold-down device (6).

5. A cantilever-type cement pipe maker according to claim 4, wherein a rubber gasket (632) is fixed to the arc-shaped face of the pressure plate (63).

6. A suspension-roller type cement pipe-making machine according to claim 1, characterized in that said mast (2) comprises a mast base (21) and a mast upper beam (22), said mast upper beam (22) being divided into a rotating end (221) and a free end (222), the free end (222) being provided with a groove (223), the rotating end (221) being rotatably connected to the mast base (21), the groove (223) of the free end (222) covering the mast base (21) when the mast (2) is closed, the free end (222) being lockingly connected to the mast base (21) by means of a locking device (23).

7. A suspension roll type cement pipe making machine according to claim 6, characterized in that said locking means (23) comprises latch holes (231) provided on both sides of the free end (222) of the gantry upper beam (22) and on the gantry base (21), the latch holes (231) being provided on both sides of the gantry free end (222), the latch holes (231) also being provided on the corresponding positions of the gantry base (21), said locking means (23) further comprises a latch (232) passing through the latch holes (231) in the fixed gantry upper beam (22) free end (222) and the gantry base (21) in sequence, said latch (232) being provided with a latch cap (233), the latch cap (233) being provided with a latch handle (234).

8. The suspension roll type cement pipe making machine according to claim 1, further comprising a feeding device (5), wherein the feeding device (5) comprises a stirring machine (51), an inclined conveyor belt (52) is arranged below the stirring machine (51), a first-stage transverse distribution conveyor belt (53) with a bidirectional operation function is arranged below the inclined conveyor belt (52), storage hoppers (54) are respectively arranged below two ends of the first-stage transverse distribution conveyor belt (53), second-stage transverse distribution conveyor belts (55) with bidirectional operation and variable frequency speed regulation functions are respectively arranged below the two storage hoppers (54), and longitudinal conveyor belts (56) are respectively arranged at two ends of the two second-stage transverse distribution conveyor belts (55).

9. The suspension roll type cement pipe making machine according to claim 1, wherein the driving mechanism is a control motor (64), the control motor (64) is installed on the bottom plate (61), a screw (65) is connected to the control motor (64), the screw (65) is rotatably connected to the two supporting blocks (651), a sliding block (652) is connected to the screw (65) in a threaded manner, supporting rods (66) are arranged on two sides of the sliding block (652), the sliding block (652) is slidably connected to the supporting rods (66), a push rod (67) is further fixed to the sliding block (652), and the pressing plate (63) is installed below the push rod (67).