CN215794661U

CN215794661U - Novel banding machine

Info

Publication number: CN215794661U
Application number: CN202122227827.4U
Authority: CN
Inventors: 徐晓文
Original assignee: Dongguan Weixin Intelligent Equipment Co ltd
Current assignee: Dongguan Weixin Intelligent Equipment Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-02-11
Anticipated expiration: 2031-09-14

Abstract

A novel banding machine relates to the technical field of banding machines. It includes: a frame; a tape storage mechanism; a looping mechanism; a tightening mechanism; a fusion welding mechanism; and, a tape cutting mechanism; the tape storage mechanism comprises: a tape storage bin; a reel shaft; a plurality of upper layer fixed rollers which are arranged at intervals; a plurality of lower travel slots; and, a plurality of lower movable rollers; the tightening mechanism includes: the moving plate is arranged in the rack, is fixedly connected with the lower movable rolling shaft and moves along with the lower movable rolling shaft; and the tightening executing part is arranged in the rack and is used for driving the movable plate to move downwards and further drive the lower movable rolling shaft to press downwards, so that a ring formed by the belt is driven to be tightly tied on a product to be bound. Adopt above-mentioned technical scheme, have the band in-process, can not leave the mar on the belt, keep the neat and artistic advantage of belt.

Description

Novel banding machine

Technical Field

The utility model relates to the technical field of belt binding machines, in particular to a novel belt binding machine.

Background

The strapping machine is a machine designed for packaging light articles, and can be used for packing paper tapes or transparent adhesive tapes, and adopts hot-melt bonding, so that the packing of products is simple and beautiful. Is suitable for paper products, medicines, cosmetics, electronic products and general light articles. And the conveying belt can be matched according to production requirements to realize unmanned packing. Achieve the aims of saving manpower and improving the packaging quality!

However, in the existing belt binding machine, the linkage of the tightening mechanism and the belt storage mechanism is poor and the structure is complex; when the tightening mechanism tightens the belt reversely, scratches are left on the belt, which affects the beauty of the belt, and in addition, the tightening force of the tightening mechanism tightening the belt reversely is insufficient, which causes the insufficient tightening force of the belt binding machine, so the improvement is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects and shortcomings of the prior art, and provides a novel belt binding machine which at least solves the problem and has the advantages that no scratch is left on a belt in a belt binding process, and the cleanness and the attractiveness of the belt are kept.

In order to achieve the purpose, the utility model adopts the technical scheme that: a novel banding machine, comprising:

a frame;

a strap storage mechanism for storing the strap and supplying the strap to the loop mechanism when needed;

the loop mechanism is used for advancing the belt along an annular track and forming a loop which is connected end to end;

a tightening mechanism for tightening the strap in a reverse direction and for tying a loop formed by the strap to the product to be banded;

the fusion welding mechanism is used for fusing the head end and the tail end of the loop into a whole; and the number of the first and second groups,

the belt cutting mechanism is used for cutting off the belt which is still connected except the loop knot;

the tape storage mechanism comprises:

the belt storage bin is arranged at the lower part of the front side of the rack;

the tape reel shaft is arranged on the tape storage bin and used for mounting a tape supply reel;

the upper layer of fixed rolling shafts are arranged at intervals, are fixedly arranged at the upper part of the belt storage bin and are used for providing supporting shafts positioned at the upper part for belts;

the lower travel grooves are arranged on the belt storage bin, are positioned at the lower part of the upper layer of fixed rolling shafts and are arranged at intervals with the upper layer of fixed rolling shafts in the horizontal direction; and the number of the first and second groups,

the lower-layer movable rolling shafts are correspondingly and movably arranged in the lower stroke grooves, can be lifted up and down, are used for providing supporting shafts positioned at the lower parts for the belts, and are matched with the upper-layer fixed rolling shafts to form a winding for the belts;

the tightening mechanism includes:

the moving plate is arranged in the rack, is fixedly connected with the lower movable rolling shaft and moves along with the lower movable rolling shaft; and the number of the first and second groups,

and the tightening executing piece is arranged in the rack and is used for driving the movable plate to move downwards and further driving the lower movable roller to press downwards, so that a ring formed by the belt is driven to be tightly tied on a product to be bound.

The utility model further provides that the tightening actuator comprises:

a rodless cylinder disposed in the frame in a vertical direction; and the number of the first and second groups,

and the push plate is assembled on the sliding block of the rodless cylinder, is positioned right above the moving plate and is used for pushing the moving plate to move downwards.

The utility model is further provided with a slide rail arranged along the vertical direction in the frame; the moving plate is assembled on the sliding rail in a sliding mode through a wheel shaft.

The utility model further provides that an electromagnetic brake is arranged at the inner end of the belt disc shaft.

The utility model further provides that the novel banding machine further comprises: a binding force adjusting mechanism; the binding force adjusting mechanism includes:

the upper stroke groove is arranged at the upper part of the belt storage bin and is arranged at intervals with the lower stroke groove in the horizontal direction;

the upper layer movable rolling shaft is movably arranged in the upper stroke groove, can lift up and down and is used for the belt to wind; and the number of the first and second groups,

and the binding force adjusting executing piece is arranged in the rack and is used for driving the upper layer movable rolling shaft to lift up and down in the upper stroke groove so as to change the binding force.

The utility model further provides that the tightening force adjustment actuator comprises:

a first telescopic air rod assembled in the frame; and the number of the first and second groups,

and one end of the first middle connecting piece is connected with the output end of the first telescopic air rod, and the other end of the first middle connecting piece is connected with the upper movable rolling shaft.

The utility model is further provided with a binding force adjusting switch which is used for adjusting the air inlet pressure of the first telescopic air rod so as to adjust the binding force; and a binding force meter for displaying the binding force is also arranged outside the rack.

The utility model is further provided with a belt inlet for the belt storage mechanism to supply the belt to the loop mechanism; a conveying belt is arranged in the rack and between the belt inlet and the loop mechanism; a pressing shaft is arranged in the rack and positioned on the upper side of the conveying belt; the pressing shaft is used for pressing the belt on the conveying belt so as to increase the friction force between the belt and the conveying belt.

The belt feeding friction adjusting executing piece is further arranged in the rack and used for driving the pressing shaft to lift up and down so as to adjust the friction between the belt and the conveying belt.

The utility model further provides that the belt feeding friction force adjusting executing piece comprises:

the second telescopic air rod is arranged in the rack; and the number of the first and second groups,

and one end of the second intermediate connecting piece is connected with the output end of the second telescopic air rod, and the other end of the second intermediate connecting piece is connected with the pressure shaft.

After the technical scheme is adopted, the utility model has the beneficial effects that:

1. according to the binding belt, the lower-layer movable rolling shaft, the movable plate and the tightening executing piece are arranged and fixedly connected, when the binding belt is needed, the tightening executing piece receives a control instruction and drives the movable plate to move downwards so as to drive the lower-layer movable rolling shaft to press downwards, and further drive a ring formed by the belt to be tightly bound on a product to be bound, and due to the fact that the lower-layer movable rolling shaft is in contact with the belt, the surface of the rolling shaft is smooth and rotatable, scratches cannot be left on the belt, and therefore the belt is kept neat and attractive.

2. In the utility model, the novel strapping machine is also provided with a strapping force adjusting mechanism, the strapping force adjusting mechanism comprises an upper stroke groove, an upper layer movable roller and a strapping force adjusting actuating piece, and a belt is wound on the upper layer movable roller.

3. In the utility model, the pressing shaft is arranged on the upper side of the conveying belt, so that the pressing shaft presses the belt on the conveying belt, and the friction force between the belt and the conveying belt is increased, so that the belt cannot slip on the conveying belt.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view from another perspective of the present invention;

FIG. 3 is a schematic view of the front housing of the rack of the present invention shown disassembled;

FIG. 4 is a schematic view of the rear housing of the rack of the present invention shown disassembled;

FIG. 5 is a schematic structural view of the tightening mechanism of the present invention;

fig. 6 is a schematic structural view of a binding force adjusting mechanism of the present invention;

FIG. 7 is a schematic view of the structure of the conveyor belt, the pressure shaft, the second telescopic air bar and the second intermediate link of the present invention;

FIG. 8 is a schematic view of the fusion welding mechanism and the tape cutting mechanism of the present invention;

FIG. 9 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 10 is an enlarged schematic view of the structure at B in fig. 1.

Description of reference numerals: 1. a frame; 2. a tape storage mechanism; 3. a looping mechanism; 4. a tightening mechanism; 5. a fusion welding mechanism; 6. a tape cutting mechanism; 7. a binding force adjusting mechanism; 8. a reel; 9. a belt; 11. a power interface; 12. an air source interface; 13. a tape inlet; 14. a conveyor belt; 15. pressing the shaft; 16. a second telescopic air rod; 17. a second intermediate connector; 18. a photosensor; 19. an upper slide plate; 20. a proximity switch; 21. a tape storage bin; 22. a reel shaft; 23. a roller is fixed on the upper layer; 24. a lower travel slot; 25. a lower movable roller; 26. an electromagnetic brake; 41. moving the plate; 42. a rodless cylinder; 43. a slider; 44. pushing the plate; 45. a slide rail; 71. an upper travel slot; 72. an upper movable roller; 73. a first telescopic air rod; 74. a first intermediate connector; 75. a binding force adjusting switch; 76. binding force meter.

Detailed Description

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

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment as necessary without making a contribution thereto after reading the present specification, but all are protected by patent laws within the scope of the claims of the present invention.

The embodiment relates to a novel belt binding machine, as shown in fig. 1 to 10, including: the binding machine comprises a rack 1, a belt storage mechanism 2 (used for storing belts 9 and supplying the belts 9 to a loop mechanism 3 when needed) arranged at the lower part of the front side of the rack 1, the loop mechanism 3 (used for advancing the belts 9 along an annular track and forming end-to-end loop knots) arranged at the upper part of the rack 1, a tightening mechanism 4 (used for reversely tightening the belts 9 and tightly binding the loop knots formed by the belts 9 on products to be bound) arranged in the rack 1, a fusion welding mechanism 5 (used for fusing the end parts of the loop knots into a whole) arranged in the rack 1, and a belt shearing mechanism 6 (used for cutting the belts 9 which are still connected except the loop knots) arranged in the rack 1; and a control system for controlling the operation of the mechanism. The outer side of the frame 1 is provided with a power interface 11 and an air interface 12.

As shown in fig. 1 to 3, the tape storage mechanism 2 includes: a belt storage bin 21, a belt disc shaft 22, a plurality of upper layer fixed rollers 23 arranged at intervals, a plurality of lower stroke grooves 24 and a plurality of lower layer movable rollers 25.

As shown in fig. 1 and 4, the tape storage magazine 21 is provided at a lower portion of the front side of the frame 1. The tape reel shaft 22 is arranged on the tape storage bin 21, the tape reel 8 formed by winding the tape 9 is sleeved on the tape reel shaft 22, and the inner end of the tape reel shaft 22 is provided with an electromagnetic brake 26.

As shown in fig. 1 and 3, a tape storage area is provided on one side of the tape reel 8 of the tape storage bin 21, and a plurality of upper fixed rollers 23, a plurality of lower travel grooves 24 and a plurality of lower movable rollers 25 are provided in the tape storage area. Specifically, a plurality of upper fixed rollers 23 arranged at intervals are fixedly installed at the upper portion of the tape storage magazine 21 for providing support shafts for the tapes 9 at the upper portion. The lower travel grooves 24 are arranged on the belt storage bin 21, are positioned at the lower part of the upper layer of fixed rollers 23, and are arranged at intervals with the upper layer of fixed rollers 23 in the horizontal direction. The lower movable roller 25 is movably mounted in the lower stroke groove 24 and can be lifted up and down to provide a support shaft at the lower part for the belt 9. The tape 9 is extended from the tape reel 8 and wound around the upper fixed roller 23 and the lower movable roller 25 to form a winding.

In this embodiment, two upper fixed rollers 23 are provided, three lower travel grooves 24 are provided, one lower movable roller 25 is provided in each lower travel groove 24, and the three lower movable rollers 25 are maintained on the same horizontal line.

As shown in fig. 4 and 5, the tightening mechanism 4 includes: moving plate 41 and the tightening actuator. The moving plate 41 is disposed in the frame 1, and is fixedly connected to the lower movable roller 25 and moves along with the lower movable roller 25. The tightening executing member is disposed in the frame 1 and is used for driving the moving plate 41 to move downwards.

Through being equipped with lower floor's activity roller bearing 25, movable plate 41 and tightening actuator, and movable plate 41 and lower floor's activity roller bearing 25 fixed connection, when needing the band, tightening actuator receives control command, drives movable plate 41 downstream, and then drives lower floor's activity roller bearing 25 and pushes down, and then drives the loop that belt 9 formed and tie closely and tie up on the product of treating the ligature, because it is lower floor's activity roller bearing 25 and belt 9 contact, the roller bearing surface is smooth and rotatable, can not leave the mar on belt 9, thereby keep belt 9 neat and artistic.

Specifically, as shown in fig. 5, the tightening actuator includes: rodless cylinder 42, push plate 44. The rodless cylinder 42 is disposed in the vertical direction within the frame 1. The push plate 44 is fitted on the slider 43 of the rodless cylinder 42 and is located directly above the moving plate 41. In this embodiment, the push plate 44 is L-shaped and is fixed to the slide block 43 of the rodless cylinder 42 by screws. A slide rail 45 is provided in the frame 1 in a vertical direction, and the moving plate 41 is slidably mounted on the slide rail 45 via a wheel shaft (not shown).

When the belt is bound, the rodless cylinder 42 receives a control command, drives the push plate 44 to slide downwards, further pushes the moving plate 41 to slide downwards from top to bottom, further drives the lower movable roller 25 to press downwards, and further drives the ring formed by the belt 9 to be bound tightly on a product to be bound. The rodless cylinder 42 is used for driving, response is fast, driving force is enough, and compared with the existing binding machine, the binding machine is tightly bound.

As another important improvement point, as shown in fig. 4, the novel belt bundling machine further includes: a binding force adjusting mechanism 7. As shown in fig. 1, 3, and 6, the binding force adjusting mechanism 7 includes: an upper stroke groove 71, an upper movable roller 72 and a binding force adjusting actuator. Wherein, the upper stroke groove 71 is arranged at the upper part of the belt storage bin 21 and is arranged at intervals with the lower stroke groove 24 in the horizontal direction. In this embodiment, the upper stroke groove 71 has an arc shape. The upper movable roller 72 is movably installed in the upper stroke groove 71 and is passed by the tape 9. The binding force adjusting and executing piece is arranged in the machine frame 1 and is used for driving the upper movable roller 72 to lift up and down in the upper stroke groove 71 so as to change the binding force.

As shown in fig. 1, the tape 9 is extended from the tape reel 8, wound around the upper movable roller 72 in addition to the upper fixed roller 23 and the lower movable roller 25, to form a winding. When the binding force needs to be adjusted, the binding force adjusting executive component drives the upper layer movable roller 72 to move up and down in the upper stroke groove 71 after receiving a control command, so that the length of the belt 9 in the belt storage mechanism 2 can be changed, and the binding force of the novel belt binding machine is further changed.

Specifically, as shown in fig. 6, the binding force adjusting actuator includes: a first telescopic air rod 73 and a first intermediate connecting piece 74. A first telescopic air rod 73 is fitted in the frame 1. One end of the first middle connecting piece 74 is connected with the output end of the first telescopic air rod 73, and the other end is connected with the upper movable roller 72.

In addition, as shown in the figure, a binding force adjusting switch 75 and a binding force meter 76 are provided outside the housing 1. The tightening force adjustment switch 75 adjusts the magnitude of the tightening force by adjusting the intake pressure of the first telescopic air rod 73. The binding force meter 76 is used to display the magnitude of the current binding force.

As shown in fig. 2, the frame 1 is provided with a tape inlet 13 for the tape storage mechanism 2 to supply the tape 9 to the looping mechanism 3. As shown in fig. 2 and 7, a conveyor belt 14 is provided in the frame 1 between the belt inlet 13 and the looping mechanism 3. However, the belt 9 slips on the conveyor belt 14 and cannot be directly conveyed. As another important improvement point, as shown in fig. 7, a pressing shaft 15 is provided inside the frame 1 and on the upper side of the conveyor belt 14. The pressing shaft 15 can press the belt 9 against the conveyor belt 14, increasing the friction between the belt 9 and the conveyor belt 14 so that the belt 9 does not slip on the conveyor belt 14.

On the basis, a belt feeding friction force adjusting actuating piece is arranged in the machine frame 1. The belt feeding friction force adjusting executing piece can drive the pressing shaft 15 to lift up and down so as to adjust the friction force between the belt 9 and the conveying belt 14. When different types of belts 9 are used, it is often necessary to adjust the height of the presser shaft 15.

Specifically, as shown in fig. 7, the belt feeding friction force adjusting actuator includes: a second telescopic gas lever 16 and a second intermediate connecting piece 17. A second telescopic air rod 16 is arranged in the frame 1. One end of the second middle connecting piece 17 is connected with the output end of the second telescopic air rod 16, and the other end is connected with the pressing shaft 15.

As shown in fig. 9, the working surface of the frame 1 is provided with a photoelectric sensor 18 and a retractable upper slide 19.

As shown in fig. 10, a proximity switch 20 is provided on the lower side of the tape storage magazine 21 near the lower side of the lower stroke groove 24.

The working principle of the utility model is roughly as follows: the tape reel 8 is sleeved on the tape reel shaft 22, a section of the tape 9 is pulled out of the tape reel 8, and the tape 9 is placed on the conveying belt 14 through the tape inlet 13 by winding the tape 9 around the upper fixed roller 23, the lower movable roller 25 and the upper movable roller 72 according to a tape threading schematic diagram. When the binding machine works, the electromagnetic brake 26 locks the belt disc shaft 22, the conveying belt 14 drives the belt 9 to be conveyed to the loop mechanism 3 under the matching of the pressing shaft 15, the loop mechanism 3 advances the belt 9 along an annular track and forms an end-to-end loop, the lower movable roller 25 is driven by the belt 9 to rise at the moment, when the photoelectric sensor 18 detects a product to be bound, the control system controls the rodless cylinder 42, the rodless cylinder 42 drives the push plate 44 to slide downwards to drive the lower movable roller 25 to fall, and further the loop formed by the belt 9 is driven to be tightly bound on the product to be bound, the end and the tail of the loop are welded into a whole by the fusion welding mechanism 5, the belt shearing mechanism 6 cuts off the belt 9 connected except the loop, and the upper sliding plate 19 retracts, so that the product is bound. Then, the electromagnetic brake 26 releases the belt disc shaft 22, the belt 9 is conveyed towards the belt storage mechanism 2, the lower movable roller 25 slides downwards to the lowest end of the lower travel groove 24, at the moment, the proximity switch 20 sends a signal to the control system, and the control system locks the electromagnetic brake 26, so that a complete cycle is completed.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered by the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A novel banding machine, comprising:

a frame (1);

a tape storage mechanism (2) for storing the tape (9) and supplying the tape (9) to the loop mechanism (3) when necessary;

the loop mechanism (3) is used for advancing the belt (9) along an annular track and forming an end-to-end loop;

a tightening mechanism (4) for tightening the strap (9) in the reverse direction and for tying the loop formed by the strap (9) to the product to be banded;

a fusion welding mechanism (5) for fusing the head and tail ends of the loop into a whole; and the number of the first and second groups,

a tape cutting mechanism (6) for cutting the tape (9) which is still connected except the loop knot;

the method is characterized in that: the tape storage mechanism (2) comprises:

the belt storage bin (21) is arranged at the lower part of the front side of the rack (1);

a reel shaft (22) which is arranged on the tape storage bin (21) and is used for installing a supply reel (8);

a plurality of upper layer fixed rollers (23) which are arranged at intervals and are fixedly arranged at the upper part of the belt storage bin (21) and used for providing support shafts positioned at the upper part for the belts (9);

a plurality of lower travel grooves (24) which are arranged on the belt storage bin (21), are positioned at the lower part of the upper layer of fixed rollers (23), and are arranged at intervals with the upper layer of fixed rollers (23) in the horizontal direction; and the number of the first and second groups,

the lower-layer movable rolling shafts (25) are correspondingly and movably arranged in the lower stroke grooves (24), can be lifted up and down, are used for providing supporting shafts positioned at the lower parts for the belts (9), and are matched with the upper-layer fixed rolling shafts (23) to form winding for the belts (9);

the tightening mechanism (4) includes:

the moving plate (41) is arranged in the rack (1), is fixedly connected with the lower movable rolling shaft (25) and moves along with the lower movable rolling shaft (25); and the number of the first and second groups,

and the tightening executing piece is arranged in the rack (1) and is used for driving the movable plate (41) to move downwards and further drive the lower movable rolling shaft (25) to press downwards, so that a ring formed by the belt (9) is driven to be tightly bound on a product to be bound.

2. The novel strap machine of claim 1 wherein the tightening actuator comprises:

a rodless cylinder (42) disposed in the frame (1) in a vertical direction; and the number of the first and second groups,

and the push plate (44) is assembled on the slide block (43) of the rodless cylinder (42), is positioned right above the moving plate (41) and is used for pushing the moving plate (41) to move downwards.

3. The novel belt binding machine of claim 2, characterized in that a slide rail (45) is arranged in the rack (1) along the vertical direction; the moving plate (41) is slidably assembled on the sliding rail (45) through a wheel axle.

4. The new belt harness machine as claimed in claim 1, characterized in that the inner end of the belt reel shaft (22) is provided with an electromagnetic brake (26).

5. The novel strapping machine of claim 1 further comprising:

a binding force adjusting mechanism (7); the binding force adjusting mechanism (7) includes:

an upper travel groove (71) which is arranged at the upper part of the belt storage bin (21) and is arranged at a distance from the lower travel groove (24) in the horizontal direction;

an upper movable roller (72) movably mounted in the upper stroke groove (71), capable of lifting up and down and allowing the belt (9) to pass through; and the number of the first and second groups,

and the binding force adjusting executing piece is arranged in the rack (1) and is used for driving the upper movable roller (72) to lift up and down in the upper stroke groove (71) so as to change the binding force.

6. The novel strapping machine of claim 5 wherein the cinching force adjustment actuator comprises:

a first telescopic air rod (73) fitted inside the frame (1); and the number of the first and second groups,

and one end of the first middle connecting piece (74) is connected with the output end of the first telescopic air rod (73), and the other end of the first middle connecting piece is connected with the upper layer movable roller (72).

7. The novel belt binding machine as claimed in claim 6, characterized in that a binding force adjusting switch (75) for adjusting the air inlet pressure of the first telescopic air rod (73) and thus the binding force is arranged outside the machine frame (1); and a binding force meter (76) for displaying the binding force is also arranged on the outer side of the frame (1).

8. The novel belt bundling machine according to claim 1, characterized in that the frame (1) is provided with a belt inlet (13) for the belt storage mechanism (2) to supply the belt (9) to the looping mechanism (3); a conveying belt (14) is arranged in the rack (1) and between the belt inlet (13) and the loop mechanism (3); a pressing shaft (15) is arranged in the rack (1) and positioned on the upper side of the conveying belt (14); the pressing shaft (15) is used for pressing the belt (9) on the conveying belt (14) so as to increase the friction force between the belt (9) and the conveying belt (14).

9. The novel belt binding machine of claim 8, wherein a belt feeding friction force adjusting actuator for driving the pressing shaft (15) to move up and down to adjust the friction force between the belt (9) and the conveying belt (14) is arranged in the rack (1).

10. The novel belt binding machine of claim 9, wherein the belt feeding friction force adjusting actuator comprises:

a second telescopic air rod (16) arranged in the frame (1); and the number of the first and second groups,

and one end of the second intermediate connecting piece (17) is connected with the output end of the second telescopic air rod (16), and the other end of the second intermediate connecting piece is connected with the pressure shaft (15).