CN215360074U

CN215360074U - Press machine convenient to dismantle mould

Info

Publication number: CN215360074U
Application number: CN202121292337.6U
Authority: CN
Inventors: 黄旭东; 申威; 彭云涛; 谢奇; 何亚聪; 申杨傲穹; 李婷
Original assignee: Astar Petrotech Co ltd
Current assignee: Sichuan Bichuang Technology Co ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-12-31
Anticipated expiration: 2031-06-09

Abstract

The application provides a press convenient to dismantle mould belongs to stamping equipment technical field. The press machine convenient for disassembling the die comprises an upper die fixing assembly, a lower die fixing assembly and an auxiliary assembling and disassembling assembly. Go up the mould setting the below of mounting panel, the cylinder is fixed the both sides of mounting panel, the fixed plate with peg graft each other between the last mould, the adapter sleeve slides and fixes on the fixed plate, the adapter sleeve with the output threaded connection of cylinder. The lower die is arranged above the machine table, the movable connecting piece is connected with the machine table in a sliding mode, the pressing plate is in threaded connection with the movable connecting piece, and the pressing plate is in contact connection with the upper portion of the lower die. The mould is convenient to disassemble, the efficiency of disassembling the mould is improved, the mould after the mould is assembled is convenient to hoist, and the efficiency of disassembling and replacing the mould is improved.

Description

Press machine convenient to dismantle mould

Technical Field

The application relates to the field of stamping equipment, in particular to a press convenient to dismantle mould.

Background

The press machine is a universal press machine with an exquisite structure, has the characteristics of wide application, high production efficiency and the like, and can be widely applied to processes of cutting, punching, blanking, bending, riveting, forming and the like.

When the press machine is used, the press machine is usually matched with a die to carry out production and processing, and the upper die and the lower die of the die are required to be respectively fixed on the press machine, but the existing fixing method is inconvenient for disassembling the die, so that the disassembling efficiency of the die is influenced, and meanwhile, after the upper die and the lower die of the die are assembled and disassembled, a travelling crane cannot directly lift the die away from the press machine due to the blocking of an external frame of the press machine, so that the disassembling and replacing efficiency of the die is further influenced.

SUMMERY OF THE UTILITY MODEL

In order to make up for above not enough, this application provides a press convenient to dismantle mould, aims at improving that current fixed method exists inconvenient dismantlement to the mould, has influenced the efficiency of mould dismantlement, and after closing the mould with the upper and lower mould of mould dismantlement simultaneously, owing to blockking of press outer frame for the driving can not directly be directly with the mould hang away from the press, has further influenced the problem of mould dismantlement and change efficiency.

The embodiment of the application provides a press convenient to dismantle mould includes fixed subassembly of last mould, lower mould fixed subassembly and supplementary loading and unloading subassembly.

Go up mould fixed subassembly and include support frame, pneumatic cylinder, mounting panel, last mould, cylinder, fixed plate and adapter sleeve, the pneumatic cylinder is fixed the top of support frame, the mounting panel is fixed the below of support frame, the mounting panel with the output of pneumatic cylinder is connected, it sets up to go up the mould the below of mounting panel, the cylinder is fixed the both sides of mounting panel, the fixed plate with peg graft each other between the last mould, the adapter sleeve slides and fixes on the fixed plate, the adapter sleeve with the output threaded connection of cylinder.

The lower die fixing component comprises a machine table, a lower die, a movable connecting piece and a pressing plate, wherein two ends of the machine table are fixed between the supporting frames, the lower die is arranged above the machine table, the movable connecting piece is connected with the machine table in a sliding mode, the pressing plate is in threaded connection with the movable connecting piece, and the pressing plate is in contact connection with the upper portion of the lower die.

The auxiliary loading and unloading assembly comprises an auxiliary lifting piece, a second electric push rod, a placing plate, a supporting column and a sliding piece, wherein the auxiliary lifting piece is arranged on one side of the lower portion of the machine table, the second electric push rod is fixed above the auxiliary lifting piece, one side of the placing plate is hinged to the output end of the second electric push rod, the supporting column is fixed on one side of the machine table, the supporting column is hinged to the lower portion of the other side of the placing plate, and the sliding piece is fixed on the placing plate.

In the implementation process, when the upper die and the lower die need to be disassembled, the hydraulic cylinder and the air cylinder are started to drive the upper die to move downwards, the upper die and the lower die are assembled, the connecting sleeve is disassembled from the output end of the hydraulic cylinder, then the connecting sleeve is taken down from the fixed plate, then the fixed plate is taken out from the upper die, finally the upper die is separated from the mounting plate, and finally the upper die is disassembled, the movable connecting piece is loosened to separate the pressing plate from the upper part of the lower die, the movable connecting piece is separated from the lower die to realize the disassembly of the lower die, and the position height of the auxiliary lifting piece is adjusted, then, the second electric push rod is started to lift one side of the placing plate upwards, so that the position height of the placing plate is slightly lower than that of the machine table, and then the upper die and the lower die after die assembly are pushed onto the placing plate through the sliding part. Through setting up supplementary lifting piece and setting up the second electric putter and be favorable to carrying out the lifting to one side of placing the board when, still be favorable to realizing accomodating placing the board, be favorable to reducing to taking up of press working space, made things convenient for and dismantled the mould, be favorable to improving the efficiency that the mould was dismantled, be convenient for hoist and mount the mould after the compound die, be favorable to further improving the efficiency that the mould was dismantled and was changed.

In a specific embodiment, the support frame comprises a vertical column, a top plate and a ground foot, wherein the top plate is fixed above the vertical column, and the ground foot is fixed at the bottom end of the vertical column.

In the implementation process, the ground feet support the stand column, the stand column is favorable for fixing the top plate, and the stand column and the top plate are connected in a welding mode.

In a specific embodiment, two sides of the upper die are provided with groove bodies, and the fixing plates are inserted into the groove bodies.

In the implementation process, the fixing plate is connected with the upper die in the groove body in an inserted mode, and the groove body is arranged to facilitate the fixing plate to be better connected with the upper die.

In a specific embodiment, a base plate is connected to one side of the air cylinder, the base plate is fixedly connected with the mounting plate, and a fixing bolt is connected between the connecting sleeve and the fixing plate.

In the implementation process, the base plate is favorable for improving the fixing effect between the air cylinder and the mounting plate, and the fixing bolt is favorable for fixing the connecting sleeve on the fixing plate.

In a specific embodiment, a sliding groove is formed in the upper surface of the machine table, and one end of the movable connecting piece is slidably connected in the sliding groove.

In the implementation process, the position of the movable connecting piece is adjusted by arranging the sliding groove, so that the molds with different sizes are fixed.

In a particular embodiment, the mobile connector comprises a base plate, a threaded rod and a nut, the base plate is slidably connected in the chute, the threaded rod is connected above the base plate, and the nut is in threaded connection on the threaded rod.

In the implementation process, the pressing plate is connected to the threaded rod in a threaded mode, the position height of the pressing plate is adjusted, the position of the pressing plate is fixed through the nut, and the fixing effect of the pressing plate on the lower die is improved.

In a specific embodiment, supplementary lifting piece is including adjusting pole, backup pad and first electric putter, it fixes to adjust the pole the below one side of board, the backup pad is connected the top of adjusting the pole, first electric putter connects one side of adjusting the pole, first electric putter's output with adjust pole sliding connection.

In the implementation process, the first electric push rod is started to drive the adjusting rod to move, so that the position height of the supporting plate is adjusted, and the second electric push rod and the placing plate are lifted.

In a particular embodiment, the adjustment lever comprises a first lever body and a second lever body, the second lever body being slidably connected above the first lever body.

In the implementation process, the first rod body and the second rod body are connected in a sliding mode, so that the distance between the first rod body and the second rod body can be adjusted conveniently, and the length of the adjusting rod can be adjusted.

In a specific implementation scheme, a connecting block is fixed on the second rod body, and the output end of the first electric push rod is connected with the connecting block.

In the implementation process, the connecting block is driven to move through the first electric push rod, so that the second rod body moves relative to the first rod body, and the length of the adjusting rod is adjusted.

In a particular embodiment, the slider comprises a reinforcing plate fixed above the resting plate and a sliding wheel connected above the reinforcing plate.

In the above-mentioned realization process, through on placing the board with mould hoist and mount, be favorable to promoting the mould to the board on through setting up the movable pulley.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic diagram of a press for facilitating disassembly of a mold according to an embodiment of the present disclosure;

fig. 2 is a schematic structural view of an upper mold fixing assembly provided in an embodiment of the present application;

FIG. 3 is a schematic view of a connection structure of a lower mold fixing assembly and an auxiliary loading and unloading assembly according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of a chute structure provided in an embodiment of the present application;

fig. 5 is a schematic view of a sliding member connection structure according to an embodiment of the present disclosure.

In the figure: 100-an upper die fixing component; 110-a support frame; 112-upright post; 114-a top plate; 116-ground anchor; 120-hydraulic cylinder; 130-a mounting plate; 140-upper mould; 142-a trough body; 150-cylinder; 152-a backing plate; 160-a fixed plate; 162-a fixing bolt; 170-connecting sleeve; 200-a lower die fixing component; 210-a machine; 212-a chute; 220-lower mould; 230-a mobile connection; 232-base plate; 234-threaded rod; 236-a nut; 240-pressing plate; 300-an auxiliary handling assembly; 310-auxiliary lifting member; 312-adjusting rod; 3122-a first shaft; 3124-a second shaft; 314-a support plate; 316-a first electric push rod; 318-connecting block; 320-a second electric push rod; 330-placing a plate; 340-support columns; 350-a sliding part; 352-a reinforcing plate; 354-sliding wheels.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1-5, the present application provides a technical solution: a press for facilitating disassembly of a die includes an upper die fixing assembly 100, a lower die fixing assembly 200, and an auxiliary handling assembly 300.

Referring to fig. 1-5, the upper mold fixing assembly 100 includes a support frame 110, a hydraulic cylinder 120, a mounting plate 130, an upper mold 140, a cylinder 150, a fixing plate 160 and a connecting sleeve 170, the support frame 110 includes a column 112, a top plate 114 and a foot 116, the top plate 114 is fixed above the column 112, and the foot 116 is fixed at the bottom end of the column 112. Ground feet 116 provide support for upright 112, upright 112 is arranged to facilitate stability of top plate 114 fixation, and upright 112 and top plate 114 are connected in a welding manner. The hydraulic cylinder 120 is fixed above the support frame 110, the mounting plate 130 is fixed below the support frame 110, the mounting plate 130 is connected with the output end of the hydraulic cylinder 120, the upper die 140 is arranged below the mounting plate 130, the air cylinders 150 are fixed on two sides of the mounting plate 130, the fixing plate 160 and the upper die 140 are mutually inserted, the two sides of the upper die 140 are provided with the groove bodies 142, and the fixing plate 160 is inserted in the groove bodies 142. The fixing plate 160 is inserted into the groove 142 to be connected to the upper mold 140, and the groove 142 is formed to facilitate the fixing plate 160 to be better connected to the upper mold 140. One side of the cylinder 150 is connected with a backing plate 152, the backing plate 152 is fixedly connected with the mounting plate 130, and a fixing bolt 162 is connected between the connecting sleeve 170 and the fixing plate 160. The setting of the backing plate 152 is beneficial to improving the fixing effect between the cylinder 150 and the mounting plate 130, and the setting of the fixing bolt 162 is beneficial to fixing the connecting sleeve 170 on the fixing plate 160. The connecting sleeve 170 is slidably fixed on the fixing plate 160, and the connecting sleeve 170 is in threaded connection with the output end of the cylinder 150.

Referring to fig. 1-5, the lower mold fixing assembly 200 includes a machine table 210, a lower mold 220, a movable connecting member 230 and a pressing plate 240, two ends of the machine table 210 are fixed between the supporting frames 110, the lower mold 220 is disposed above the machine table 210, the movable connecting member 230 is slidably connected with the machine table 210, a sliding groove 212 is disposed on an upper surface of the machine table 210, and one end of the movable connecting member 230 is slidably connected in the sliding groove 212. The position of the movable connecting member 230 can be adjusted by opening the sliding groove 212, so that the molds with different sizes can be fixed. The pressing plate 240 is screw-coupled to the moving coupling 230, and the pressing plate 240 is coupled in contact with the upper side of the lower mold 220. The travel link 230 includes a base plate 232 slidably coupled within the chute 212, a threaded rod 234 coupled above the base plate 232, and a nut 236 threadably coupled to the threaded rod 234. The pressing plate 240 is in threaded connection with the threaded rod 234, the height of the position of the pressing plate 240 is adjusted, the position of the pressing plate 240 is fixed through the nut 236, and the fixing effect of the pressing plate 240 on the lower die 220 is improved.

Referring to fig. 1 to 5, the auxiliary loading and unloading assembly 300 includes an auxiliary lifting member 310, a second electric push rod 320, a placing plate 330, a supporting column 340 and a sliding member 350, the auxiliary lifting member 310 is disposed at one side of the lower portion of the machine table 210, the auxiliary lifting member 310 includes an adjusting rod 312, a supporting plate 314 and a first electric push rod 316, the adjusting rod 312 is fixed at one side of the lower portion of the machine table 210, the supporting plate 314 is connected above the adjusting rod 312, the first electric push rod 316 is connected at one side of the adjusting rod 312, and an output end of the first electric push rod 316 is slidably connected with the adjusting rod 312. The first electric push rod 316 is started to drive the adjusting rod 312 to move, so that the position height of the supporting plate 314 can be adjusted, and the second electric push rod 320 and the placing plate 330 can be lifted. The adjustment lever 312 includes a first lever 3122 and a second lever 3124, the second lever 3124 being slidably connected above the first lever 3122. Through the sliding connection between the first rod 3122 and the second rod 3124, the distance between the first rod 3122 and the second rod 3124 can be conveniently adjusted, so that the length of the adjusting rod 312 can be adjusted. The second rod 3124 is fixed with a connecting block 318, and the output end of the first electric push rod 316 is connected with the connecting block 318. The first electric push rod 316 drives the connecting block 318 to move, so that the second rod body 3124 moves relative to the first rod body 3122, and the length of the adjusting rod 312 is adjusted. The second electric push rod 320 is fixed above the auxiliary lifting member 310, one side of the placing plate 330 is hinged to the output end of the second electric push rod 320, the supporting column 340 is fixed to one side of the machine table 210, in the present application, the height of the supporting column 340 is lower than the height of the machine table 210, the supporting column 340 is hinged below the other side of the placing plate 330, and the sliding member 350 is fixed on the placing plate 330. The slider 350 includes a reinforcing plate 352 and a sliding wheel 354, the reinforcing plate 352 being fixed above the placement plate 330, the sliding wheel 354 being connected above the reinforcing plate 352. By lifting the mold onto the placing plate 330, it is facilitated to push the mold onto the machine table 210 by providing the sliding wheels 354.

The working principle of the press machine convenient for disassembling the die is as follows: when the upper die 140 and the lower die 220 are required to be disassembled, the upper die 140 is driven to move downwards by starting the hydraulic cylinder 120 and the air cylinder 150, the upper die 140 and the lower die 220 are assembled, the connecting sleeve 170 is disassembled from the output end of the hydraulic cylinder 120 by disassembling the fixing bolt 162, the connecting sleeve 170 is then disassembled from the fixing plate 160, the fixing plate 160 is then taken out of the groove body 142, the upper die 140 is finally separated from the mounting plate 130, the upper die 140 is finally disassembled, the pressing plate 240 is separated from the upper part of the lower die 220 by loosening the nut 236, the movable connecting piece 230 is separated from the lower die 220 through the chute 212, the lower die 220 is disassembled, the position of the movable connecting piece 230 is favorably adjusted by arranging the chute 212, and the dies with different sizes are favorably fixed. Then, the first electric push rod 316 is started to drive the supporting plate 314 to move upwards, the supporting plate 314 drives the second electric push rod 320 to move upwards, then the second electric push rod 320 is started to lift one side of the placing plate 330 upwards, the position height of the placing plate 330 is slightly lower than that of the machine table 210, and then the upper die 140 and the lower die 220 after die assembly are pushed onto the placing plate 330 through the sliding wheel 354. Through setting up supplementary lifting piece 310 and setting up second electric putter 320 and be favorable to carrying out the lifting to one side of placing board 330 in the time, still be favorable to realizing accomodating placing board 330, be favorable to reducing the occupation to press working space, it has been improved current fixed method and has had inconvenient dismantlement to the mould, the efficiency of mould dismantlement has been influenced, simultaneously with the mould upper and lower mould of mould close mould dismantle after, because the blockking of press outer frame, make the driving can not directly hang away the mould from the press, the problem of mould dismantlement and change efficiency has further been influenced.

It should be noted that the specific model specifications of the hydraulic cylinder 120, the air cylinder 150, the first electric push rod 316 and the second electric push rod 320 need to be determined according to the actual specification of the device, and the specific model selection calculation method adopts the prior art, so detailed description is omitted.

The power supply and the principle of the hydraulic cylinder 120, the pneumatic cylinder 150, the first electric push rod 316 and the second electric push rod 320 are clear to those skilled in the art and will not be described in detail herein.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A press machine convenient for disassembling a die is characterized by comprising

An upper die fixing component (100), wherein the upper die fixing component (100) comprises a support frame (110), a hydraulic cylinder (120), a mounting plate (130), an upper die (140), a cylinder (150), a fixing plate (160) and a connecting sleeve (170), the hydraulic cylinder (120) is fixed above the support frame (110), the mounting plate (130) is fixed below the support frame (110), the mounting plate (130) is connected with the output end of the hydraulic cylinder (120), the upper die (140) is arranged below the mounting plate (130), the air cylinders (150) are fixed on two sides of the mounting plate (130), the fixing plate (160) and the upper die (140) are inserted with each other, the connecting sleeve (170) is fixed on the fixing plate (160) in a sliding manner, and the connecting sleeve (170) is in threaded connection with the output end of the air cylinder (150);

the lower die fixing assembly (200) comprises a machine table (210), a lower die (220), a movable connecting piece (230) and a pressing plate (240), two ends of the machine table (210) are fixed between the supporting frames (110), the lower die (220) is arranged above the machine table (210), the movable connecting piece (230) is in sliding connection with the machine table (210), the pressing plate (240) is in threaded connection with the movable connecting piece (230), and the pressing plate (240) is in contact connection with the upper part of the lower die (220);

the auxiliary loading and unloading assembly (300) comprises an auxiliary lifting piece (310), a second electric push rod (320), a placing plate (330), a supporting column (340) and a sliding piece (350), wherein the auxiliary lifting piece (310) is arranged on one side of the lower portion of the machine table (210), the second electric push rod (320) is fixed above the auxiliary lifting piece (310), one side of the placing plate (330) is hinged to the output end of the second electric push rod (320), the supporting column (340) is fixed on one side of the machine table (210), the supporting column (340) is hinged below the other side of the placing plate (330), and the sliding piece (350) is fixed on the placing plate (330).

2. The press for facilitating die disassembly according to claim 1, wherein the supporting frame (110) comprises a column (112), a top plate (114), and a bottom pin (116), the top plate (114) being fixed above the column (112), the bottom pin (116) being fixed at a bottom end of the column (112).

3. The press machine convenient to disassemble the die as claimed in claim 1, wherein two sides of the upper die (140) are provided with grooves (142), and the fixing plate (160) is inserted in the grooves (142).

4. The press convenient for disassembling the die as claimed in claim 1, wherein a pad (152) is connected to one side of the cylinder (150), the pad (152) is fixedly connected with the mounting plate (130), and a fixing bolt (162) is connected between the connecting sleeve (170) and the fixing plate (160).

5. The press machine convenient for disassembling the die as claimed in claim 1, wherein a sliding groove (212) is formed on an upper surface of the machine table (210), and one end of the movable connecting member (230) is slidably connected in the sliding groove (212).

6. The press for facilitating the disassembly of a die of claim 5, wherein the moving link (230) comprises a bottom plate (232), a threaded rod (234), and a nut (236), the bottom plate (232) being slidably coupled within the chute (212), the threaded rod (234) being coupled above the bottom plate (232), the nut (236) being threadably coupled to the threaded rod (234).

7. The press convenient for die disassembly as claimed in claim 1, wherein the auxiliary lifting member (310) comprises an adjusting rod (312), a supporting plate (314), and a first electric push rod (316), the adjusting rod (312) is fixed on one side of the lower part of the machine table (210), the supporting plate (314) is connected above the adjusting rod (312), the first electric push rod (316) is connected on one side of the adjusting rod (312), and the output end of the first electric push rod (316) is slidably connected with the adjusting rod (312).

8. Press facilitating the removal of moulds according to claim 7, characterised in that the adjustment bar (312) comprises a first bar (3122) and a second bar (3124), the second bar (3124) being slidingly connected above the first bar (3122).

9. The press capable of conveniently disassembling the dies according to claim 8, wherein a connecting block (318) is fixed on the second rod body (3124), and the output end of the first electric push rod (316) is connected with the connecting block (318).

10. Press for facilitating the disassembly of dies according to claim 1, characterized in that the slide (350) comprises a reinforcement plate (352) and a sliding wheel (354), the reinforcement plate (352) being fixed above the resting plate (330), the sliding wheel (354) being connected above the reinforcement plate (352).