CN219173865U - Pneumatic slitting knife with adjustable buffer pressure - Google Patents

Abstract

The utility model provides a pneumatic dividing knife with adjustable buffer pressure, wherein a connecting block is connected with a telescopic driving assembly, one end of a supporting cover is rotationally connected with the connecting block around a first rotating shaft, the other end of the supporting cover is rotationally connected with a bearing sleeve around a second rotating shaft, one end of a linkage frame is rotationally connected with the connecting block around a third rotating shaft, the other end of the linkage frame is rotationally connected with the bearing sleeve around a fourth rotating shaft, a blade is connected with the bearing sleeve, a first elastic piece is arranged between the supporting cover and the connecting block, an adjusting threaded hole is formed in the connecting block in a penetrating mode, an adjusting screw is in threaded connection with the adjusting threaded hole, and one end of the adjusting screw is in contact with the first elastic piece. According to the pneumatic dividing knife with the adjustable buffer pressure, the adjusting threaded hole is formed in the connecting block in a penetrating mode, the adjusting screw is connected in the adjusting threaded hole and is extruded with the first elastic piece, and the pretightening force of the first elastic piece can be conveniently adjusted through operation of the adjusting screw, and the first elastic piece can be conveniently disassembled, assembled and replaced after the adjusting screw is disassembled.

Description

Pneumatic slitting knife with adjustable buffer pressure

Technical Field

The utility model relates to the field of slitting devices, in particular to a pneumatic slitting knife with adjustable buffer pressure.

Background

At present, when processing coiled materials, a process of cutting the coiled materials into thin long sheet materials by a blade is generally carried out, such as slitting of roll paper. The cutter is generally elastically connected with the blade, so that the service life of the slitting knife is prolonged, and the blade is prevented from being easily dulled and damaged. But in prior art, generally set up the elastic component directly between blade and blade connection structure, need set up sliding fit structure between blade and the blade connection structure, need more spaces to connect fixedly the elastic component, whole volume is big, and is with high costs. On the other hand, along with the increase of the service time, the elasticity of the elastic piece can gradually decline, and the life of fatigue exists, and the cutting knife of the existing structure is inconvenient to adjust the elastic force of the elastic piece to the blade, and is inconvenient to assemble, disassemble and replace.

Therefore, it is necessary to provide a pneumatic slitting knife with adjustable buffer pressure to solve the above-mentioned problems.

Disclosure of Invention

The utility model provides a pneumatic slitting knife with adjustable buffer pressure, which solves the problems that the slitting knife in the prior art is large in size and inconvenient to adjust the elastic force of an elastic piece on a blade.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the pneumatic slitting knife comprises a telescopic driving assembly, a connecting block, a blade, a supporting cover, a linkage frame, a first elastic piece, an adjusting screw and a bearing sleeve, wherein the buffering pressure of the pneumatic slitting knife is adjustable;

the connecting block with flexible end connection of flexible drive assembly, the one end of supporting cover with the connecting block rotates to be connected around first pivot, the other end around the second pivot with the bearing housing rotates to be connected, first pivot with the second pivot is parallel, the one end of link frame around the third pivot with the connecting block rotates to be connected, the other end around the fourth pivot with the bearing housing rotates to be connected, the third pivot with the fourth pivot is parallel, the third pivot with first pivot is parallel, the blade with the bearing housing is connected, first elastic component sets up the supporting cover with between the connecting block, the elastic force direction with first pivot is perpendicular, the axial direction of blade with the axial direction of first elastic component is unanimous, link up on the connecting block and be provided with and be used for the locating connection the adjustment screw hole of first elastic component, adjusting screw with adjusting screw hole threaded connection is provided with the position hole on the link frame, the screw head of adjusting screw one end passes the position hole and keeps away, the other end of adjusting screw extends out with first elastic component contacts.

In the utility model, two ends of one surface of the connecting block are respectively provided with one first elastic piece, the other surface of the connecting block is provided with a containing hole, and an elastic rubber block used for being in contact with the linkage frame is arranged in the containing hole.

In the utility model, the supporting cover comprises a cover plate and two first connecting plates connected to one surface of the cover plate, the two first connecting plates are respectively connected to two ends of the connecting block, two ends of the first connecting plates are respectively connected with a first rotating shaft and a second rotating shaft, the linkage frame comprises a main body plate and two second connecting plates connected to one surface of the main body plate, the two second connecting plates are respectively connected to two ends of the connecting block, and two ends of the second connecting plates are respectively connected with the third rotating shaft and the fourth rotating shaft.

In the utility model, the adjusting screw, the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft are all hexagon socket screws, a reinforcing rib plate is connected between the first connecting plate and the cover plate, an L-shaped hexagon socket wrench for disassembling and assembling the hexagon socket screws is detachably arranged between the first connecting plate and the cover plate, clamping pieces for connecting the hexagon socket wrench are arranged on the first connecting plate and the cover plate, and the axial extending direction of the hexagon socket wrench is parallel to the plate surface of the reinforcing rib plate.

In the utility model, the telescopic driving assembly comprises an upper base body, a lower base body, a pneumatic telescopic rod and a movable block, wherein the upper base body and the lower base body are in butt joint packaging with the pneumatic telescopic rod, the pneumatic telescopic rod comprises a first rod section and a second rod section which are in sliding connection with each other, the first rod section is in sliding connection with the lower base body, one end of the first rod section is connected with the movable block, and the second rod section is connected with the upper base body.

The connecting device comprises an upper seat body and is characterized in that a connecting hole is formed in the upper seat body, a threaded hole penetrating through the connecting hole in the radial direction is formed in one side of the upper seat body, a fixing column connected with the first rod section is arranged in the connecting hole, a first screw is connected in the threaded hole, and the fixing column is extruded by the first screw to fix the fixing column at a set position in the connecting hole.

In the utility model, the movable block is convexly provided with the sliding block, the connecting block is provided with the sliding groove, the sliding block is in sliding connection with the sliding groove, the sliding direction is perpendicular to the extending direction of the pneumatic telescopic rod, and the sliding block is locked in the sliding groove through the second screw.

Further, the two ends of the sliding groove penetrate through the connecting block, the cross section of the sliding block is trapezoid, a boss portion is arranged at one end of the sliding block, and when the sliding block is assembled with the sliding groove, the boss portion and the plane where the port of the sliding groove is located are in surface contact positioning.

In the utility model, one side of the first rod section is connected with an extension part, a second elastic piece is arranged between the extension part and the bottom wall of the lower seat body, and the second elastic piece is used for extruding the first rod section to slide towards the direction close to the upper seat body.

In the utility model, one end of the connecting block is wider and is in an L-shaped structure, the wider end is used for being connected with the telescopic driving assembly, the first elastic piece is connected between the narrower end of the connecting block and the supporting cover, one end of the bearing sleeve is wider and is in an L-shaped structure, and the wider end is used for being connected with the second rotating shaft and the fourth rotating shaft.

Compared with the prior art, the utility model has the beneficial effects that: according to the pneumatic dividing knife with the adjustable buffer pressure, the adjusting threaded hole is formed in the connecting block in a penetrating mode, the adjusting screw is connected in the adjusting threaded hole and is extruded with the first elastic piece, and the pretightening force of the first elastic piece can be conveniently adjusted through operation of the adjusting screw, and the first elastic piece can be conveniently disassembled, assembled and replaced after the adjusting screw is disassembled.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments are briefly described below, and the drawings in the following description are only drawings corresponding to some embodiments of the present utility model.

Fig. 1 is a schematic structural view of a preferred embodiment of a pneumatic slitting knife with adjustable cushioning pressure according to the present utility model.

Fig. 2 is a schematic diagram showing a disassembled structure of a pneumatic slitting knife with adjustable buffer pressure according to the utility model.

Fig. 3 is a schematic structural view of a fixed column and an upper seat of the pneumatic slitting knife with adjustable buffer pressure.

Fig. 4 is a schematic structural view of a movable block and a connecting block of the pneumatic slitting knife with adjustable buffer pressure.

Fig. 5 is a schematic structural view of a supporting cover of a pneumatic slitting knife with adjustable buffer pressure according to the utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms of directions used in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are used for explaining and understanding the present utility model only with reference to the orientation of the drawings, and are not intended to limit the present utility model.

The words "first," "second," and the like in the terminology of the present utility model are used for descriptive purposes only and are not to be construed as indicating or implying relative importance and not as limiting the order of precedence.

In the present utility model, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the prior art, in order to improve the elastic buffering performance of the blade, an elastic piece is generally directly arranged between the blade and the blade connecting structure, a sliding fit structure is required to be arranged between the blade and the blade connecting structure, more space is required to connect and fix the elastic piece, and the whole size is large and the cost is high. On the other hand, along with the increase of the service time, the elasticity of the elastic piece can gradually decline, and the life of fatigue exists, and the cutting knife of the existing structure is inconvenient to adjust the elastic force of the elastic piece to the blade, and is inconvenient to assemble, disassemble and replace.

The following is a preferred embodiment of a pneumatic slitting knife with adjustable buffer pressure, which solves the above technical problems.

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a pneumatic cutter with adjustable buffer pressure according to a preferred embodiment of the present utility model. Fig. 2 is a schematic diagram showing a disassembled structure of a pneumatic slitting knife with adjustable buffer pressure according to the utility model.

In the drawings, like structural elements are denoted by like reference numerals.

The utility model provides a pneumatic slitting knife with adjustable buffer pressure, which comprises: the telescopic drive assembly, the connecting block 12, the blade 13, the support housing 14, the linkage frame 15, the first elastic member 16, the adjusting screw 1C, and the bearing housing 17.

The connecting block 12 is connected with the flexible end of flexible drive assembly, the one end of supporting cover 14 is rotated around first pivot 181 and connecting block 12 and is connected, the other end is rotated around second pivot 182 and is connected with bearing housing 17, first pivot 181 is parallel with second pivot 182, the one end of link frame 15 is rotated around third pivot 183 and is connected with connecting block 12, the other end is rotated around fourth pivot 184 and is connected with bearing housing 17, third pivot 183 is parallel with fourth pivot 184, third pivot 183 is parallel with first pivot 181, blade 13 is connected with bearing housing 17, first elastic component 16 sets up between supporting cover 14 and connecting block 12, the elastic force direction is perpendicular with first pivot 181, the axial direction of blade 13 is unanimous with the axial direction of first elastic component 16.

Through the normal running fit of support cover 14 and linkage frame 15, can realize the level of bearing housing 17 position and float, do benefit to stable accurate vertical cutting coiled material. The supporting cover 14 is used for pressing and fixing the first elastic piece 16 around the first rotating shaft 181, and the bearing sleeve 17 is driven by one end, far away from the first rotating shaft 181, of the supporting cover 14 to horizontally move, namely, the supporting cover 14 swings around the first rotating shaft 181 to horizontally move the bearing sleeve 17, so that the whole size is smaller, and the bearing sleeve 17 can be driven to horizontally move by a larger amount.

Referring to fig. 2 and 4, an adjusting threaded hole 122 for positioning and connecting the first elastic member 16 is provided in the connecting block 12, an adjusting screw 1C is in threaded connection with the adjusting threaded hole 122, a avoidance hole 1511 is provided in the linkage frame 15, a screw head at one end of the adjusting screw 1C extends out through the avoidance hole 1511, and the other end of the adjusting screw 1C contacts the first elastic member 16. The extrusion force of the adjusting screw 1C to the first elastic piece 16 can be changed by screwing the adjusting screw 1C, so that the pretightening force of the first elastic piece 16 can be very conveniently adjusted, and the first elastic piece 16 can be very conveniently disassembled, assembled and replaced after the adjusting screw 1C is disassembled.

The two ends of one surface of the connecting block 12 are respectively provided with a first elastic member 16, so that the elastic force of the supporting cover 14 is more balanced. The other side of connecting block 12 is provided with the accommodation hole, is provided with in the accommodation hole to be used for with the elastic glue piece 1B of linkage frame 15 contact for linkage frame 15 activity in-process is more silence.

The supporting cover 14 includes a cover plate 141 and two first connecting plates 142 connected to one side of the cover plate 141, the two first connecting plates 142 are respectively connected to two ends of the connecting block 12, two ends of the first connecting plates 142 are respectively connected to a first rotating shaft 181 and a second rotating shaft 182, the linkage frame 15 includes a main body plate 151 and two second connecting plates 152 connected to one side of the main body plate 151, the two second connecting plates 152 are respectively connected to two ends of the connecting block 12, and two ends of the second connecting plates 152 are respectively connected to a third rotating shaft 183 and a fourth rotating shaft 184.

The adjusting screw 1C, the first rotating shaft 181, the second rotating shaft 182, the third rotating shaft 183, and the fourth rotating shaft 184 in this embodiment are socket head cap screws. The first rotating shaft 181, the second rotating shaft 182, the third rotating shaft 183 and the fourth rotating shaft 184 are all provided with two, and are not all indicated in fig. 2.

Referring to fig. 5, a reinforcing rib 144 is connected between the first connecting plate 142 and the cover plate 141, an L-shaped socket head cap wrench 145 for assembling and disassembling socket head cap screws is detachably arranged between the first connecting plate 142 and the cover plate 141, and fastening members 146 for connecting with the socket head cap wrench are arranged on the first connecting plate 142 and the cover plate 141, and the axial extension direction of the socket head cap wrench 145 is parallel to the plate surface of the reinforcing rib 144. The socket head cap screw 145 can be used to adjust or disassemble the socket head cap screw and also to strengthen the connection between the first connection plate 142 and the cover plate 141.

Referring to fig. 2, it should be noted that in the present embodiment, an opening is provided on the supporting cover 14, and the blade wheel 132 passes through the opening on the supporting cover 14 to be connected with the bearing housing 17.

Referring to fig. 2, in the present embodiment, the telescopic driving assembly includes an upper base 111, a lower base 112, a pneumatic telescopic rod, and a movable block 113, wherein the upper base 111 and the lower base 112 are butt-jointed to encapsulate the pneumatic telescopic rod, the pneumatic telescopic rod includes a first rod segment 1151 and a second rod segment 1152 that are slidably connected to each other, the first rod segment 1151 is slidably connected in the lower base 112, and one end of the first rod segment is connected to the movable block 113, and the second rod segment 1152 is connected to the upper base 111. The movable block 113 is driven to lift by the extension of the pneumatic telescopic rod, namely the blade 13 is controlled to lift and cut.

Referring to fig. 3, further, a connection hole 1111 is formed in the upper base 111, a threaded hole 1112 penetrating along a radial direction of the connection hole 1111 is formed in one side of the upper base 111, a fixing post 114 connected to the first rod segment 1151 is formed in the connection hole 1111, a screw can be used to penetrate through the fixing post 114 and connect to the first rod segment 1151, a first screw 1113 is connected to the threaded hole 1112, and the fixing post 114 is pressed by the first screw 1113 to fix the fixing post 114 at a set position in the connection hole 1111. The first screw 113 is unscrewed, so that the position of the fixing column 114 is conveniently adjusted, and the lifting amount of the blade 13 is further adjusted.

Referring to fig. 4, preferably, a sliding block 1131 is protruding from the movable block 113, a sliding slot 121 is disposed on the connecting block 12, the sliding block 1131 is slidably connected with the sliding slot 121, the sliding direction is perpendicular to the extending direction of the pneumatic telescopic rod, the sliding block 1131 is locked in the sliding slot 121 through a second screw, and the second screw is connected in the screw hole 123. The disassembly and assembly are convenient, and the sliding direction is vertical to the lifting direction, so that the stress in the cutting process can not affect the connection between the movable block 113 and the connecting block 12.

In this embodiment, two ends of the sliding groove 121 penetrate through the connecting block 12, the cross section of the sliding block 1131 is trapezoid, one end of the sliding block 1131 is provided with a boss portion 132, and when the sliding block 1131 is assembled with the sliding groove 121, the boss portion 132 is positioned in surface contact with the plane where the port of the sliding groove 121 is located, so that the assembly is facilitated.

In the present utility model, an extension portion 1153 is connected to one side of the first rod segment 1151, and a second elastic member 116 is disposed between the extension portion 1153 and the bottom wall of the lower housing 112, where the second elastic member 116 is used to press the first rod segment 1151 to slide in a direction approaching the upper housing 111.

In the present utility model, the bushing 117 for sliding connection with the first rod segment 1151 is disposed in the lower seat 112, which is beneficial to the lifting and sliding of the first rod segment 1151, and the bushing 117 can be replaced after frequent sliding generates wear.

In this embodiment, a guide post 1A is connected between the movable block 113 and the lower base 112, one end of the guide post 1A is fixedly connected with the movable block 113, and the guide post 1A is slidably connected with the lower base 112, so as to improve the stability of sliding lifting.

In this embodiment, the connecting block 12 has a wider end, an L-shaped structure, a wider end is used to connect with the telescopic driving assembly, the first elastic member 16 is connected between the narrower end of the connecting block 12 and the supporting cover 14, the bearing sleeve 17 has a wider end, an L-shaped structure, and a wider end is used to connect the second rotating shaft 182 and the fourth rotating shaft 184, so that the overall connection structure is more compact.

In the utility model, the periphery of the supporting cover 14 is provided with the protection folded edge 143 around the blade 13, the sum of the widths of the supporting cover 14 and the linkage frame 15 is smaller than or equal to the maximum width of the connecting block 12, and the outer contour of the whole structure of the slitting knife can be made smaller, so that the structure is compact.

Referring to fig. 2, in the present embodiment, the bearing sleeve 17 is provided with a bearing hole 171, the pneumatic cutter with adjustable buffer pressure further includes a blade wheel 132 and a pressing plate 131, the blade 13 is locked between the pressing plate 131 and the blade wheel 132, the blade wheel 132 is connected with the bearing hole 171 through a bearing 191, one end of the bearing hole 171 is provided with an end cover 193, and a locking bolt 192 penetrates the end cover 193, the bearing hole 171, the blade wheel 132, and the blade 13 and is connected with a locking nut, so as to lock and connect the end cover 193, the bearing 191, the blade wheel 132, and the blade 13.

When the pneumatic slitting knife with the adjustable buffering pressure is used, the first elastic piece 16 can extrude the supporting cover 14 to rotate around the first rotating shaft 181 in a direction away from the linkage frame, and meanwhile, the linkage frame 15 can be driven to rotate together, so that the blade 13 connected to the bearing sleeve 17 can elastically float along the horizontal direction, the blade is not easy to blunt and damage, and the pneumatic slitting knife has a compact overall structure and a small volume.

In addition, through the arrangement of the adjusting screw hole 122 on the connecting block 12, the adjusting screw 1C is connected in the adjusting screw hole 122 and is extruded with the first elastic member 16, so that the pretightening force of the first elastic member 16 can be very conveniently adjusted by operating the adjusting screw 1C, and the first elastic member 16 can be very conveniently disassembled and replaced after the adjusting screw 1C is disassembled.

In summary, although the present utility model has been described in terms of the preferred embodiments, the preferred embodiments are not limited to the above embodiments, and various modifications and changes can be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model is defined by the appended claims.

Claims (10)

1. A pneumatic slitting knife with adjustable cushioning pressure, comprising: the device comprises a telescopic driving assembly, a connecting block, a blade, a supporting cover, a linkage frame, a first elastic piece, an adjusting screw and a bearing sleeve;

the connecting block with flexible end connection of flexible drive assembly, the one end of supporting cover with the connecting block rotates to be connected around first pivot, the other end around the second pivot with the bearing housing rotates to be connected, first pivot with the second pivot is parallel, the one end of link frame around the third pivot with the connecting block rotates to be connected, the other end around the fourth pivot with the bearing housing rotates to be connected, the third pivot with the fourth pivot is parallel, the third pivot with first pivot is parallel, the blade with the bearing housing is connected, first elastic component sets up the supporting cover with between the connecting block, the elastic force direction with first pivot is perpendicular, the axial direction of blade with the axial direction of first elastic component is unanimous, link up on the connecting block and be provided with and be used for the locating connection the adjustment screw hole of first elastic component, adjusting screw with adjusting screw hole threaded connection is provided with the position hole on the link frame, the screw head of adjusting screw one end passes the position hole and keeps away, the other end of adjusting screw extends out with first elastic component contacts.

2. The pneumatic slitting knife with adjustable buffer pressure according to claim 1, wherein two ends of one surface of the connecting block are respectively provided with one first elastic piece, the other surface of the connecting block is provided with a containing hole, and an elastic rubber block for contacting with the linkage frame is arranged in the containing hole.

3. The pneumatic slitting knife with adjustable buffer pressure according to claim 1, wherein the supporting cover comprises a cover plate and two first connecting plates connected to one surface of the cover plate, the two first connecting plates are respectively connected to two ends of the connecting block, two ends of the first connecting plates are respectively connected with a first rotating shaft and a second rotating shaft, the linkage frame comprises a main body plate and two second connecting plates connected to one surface of the main body plate, the two second connecting plates are respectively connected to two ends of the connecting block, and two ends of the second connecting plates are respectively connected with the third rotating shaft and the fourth rotating shaft.

4. The pneumatic cutter of claim 3, wherein the adjusting screw, the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft are all socket head cap screws, a reinforcing rib plate is connected between the first connecting plate and the cover plate, an L-shaped socket head cap wrench for disassembling and assembling the socket head cap screws is detachably arranged between the first connecting plate and the cover plate, and clamping members for connecting with the socket head cap wrench are arranged on the first connecting plate and the cover plate, and the axial extending direction of the socket head cap wrench is parallel to the plate surface of the reinforcing rib plate.

5. The adjustable cushion pressure pneumatic knife of claim 1, wherein the telescoping drive assembly comprises an upper housing, a lower housing, a pneumatic telescoping rod, and a movable block, wherein the upper housing and the lower housing are butt-sealed to the pneumatic telescoping rod, the pneumatic telescoping rod comprises a first rod section and a second rod section slidably connected to each other, the first rod section is slidably connected to the lower housing, one end of the first rod section is connected to the movable block, and the second rod section is connected to the upper housing.

6. The pneumatic cutter of claim 5, wherein the upper housing is provided with a connecting hole, one side of the upper housing is provided with a threaded hole penetrating along the radial direction of the connecting hole, a fixing column connected with the first rod section is arranged in the connecting hole, a first screw is connected in the threaded hole, and the first screw presses the fixing column to fix the fixing column at a set position in the connecting hole.

7. The pneumatic slitting knife with adjustable buffering pressure according to claim 5, wherein a sliding block is arranged on the movable block in a protruding mode, a sliding groove is arranged on the connecting block, the sliding block is connected with the sliding groove in a sliding mode, the sliding direction is perpendicular to the extending direction of the pneumatic telescopic rod, and the sliding block is locked in the sliding groove through a second screw.

8. The pneumatic cutter of claim 7, wherein two ends of the chute penetrate through the connecting block, the cross section of the slide block is trapezoid, one end of the slide block is provided with a boss part, and when the slide block is assembled with the chute, the boss part is in surface contact positioning with the plane where the port of the chute is located.

9. The adjustable cushion pressure pneumatic slitting knife of claim 5, wherein one side of the first pole segment is connected with an extension, a second elastic element is disposed between the extension and the bottom wall of the lower seat body, and the second elastic element is used for extruding the first pole segment to slide in a direction approaching the upper seat body.

10. The adjustable cushion pressure pneumatic slitting knife of claim 1, wherein one end of the connecting block is wider and is in an L-shaped structure, the wider end is used for being connected with the telescopic driving assembly, the first elastic piece is connected between the narrower end of the connecting block and the supporting cover, one end of the bearing sleeve is wider and is in an L-shaped structure, and the wider end is used for being connected with the second rotating shaft and the fourth rotating shaft.

Images