CN111922405B

CN111922405B - Gasoline engine piston ring production manufacturing cutting processing assembly line

Info

Publication number: CN111922405B
Application number: CN202010928845.2A
Authority: CN
Inventors: 郭庆利; 周洋
Original assignee: Hangzhou Jiangdong Internal Combustion Engine Fittings Co ltd
Current assignee: HANGZHOU JIANGDONG INTERNAL COMBUSTION ENGINE FITTINGS Co.,Ltd.
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2021-04-09
Anticipated expiration: 2040-09-07
Also published as: CN111922405A

Abstract

The invention provides a gasoline engine piston ring production, manufacturing and cutting processing assembly line, which comprises a base, a support frame, a cutting mechanism, a fixing mechanism and a discharge hole. The invention provides a gasoline engine piston ring production and manufacturing cutting processing line, which can solve the following problems in the cutting processing process of a piston ring: a. the existing cutting processing equipment for piston ring cuts generally performs excircle positioning or inner circle positioning on the piston ring for positioning and fixing the piston ring, and the piston ring is easy to deform due to the adoption of the sheet surface positioning mode; b. at present, the fixed positioning of the cutting processing equipment for the piston ring cut is generally fixed and limited on a plane, and other planes are not limited, so that the end face of the piston ring is easy to deform up and down during cutting; c. the existing equipment generally performs cutting processing on a piston ring with a certain specification, and the equipment can not perform cutting processing on piston rings with different specifications.

Description

Gasoline engine piston ring production manufacturing cutting processing assembly line

Technical Field

The invention relates to the technical field of piston ring processing, in particular to a gasoline engine piston ring production, manufacturing and cutting processing production line.

Background

The piston ring is a metal ring used for embedding the inside of a piston groove, and is also a metal elastic ring with larger outward expansion deformation, and is assembled in a ring groove with the section corresponding to the piston ring, the piston ring which reciprocates and rotates forms a seal between the outer circular surface of the ring and a cylinder and one side surface of the ring and the ring groove by the pressure difference of gas or liquid, and the piston ring is widely used in various power machines, such as a steam engine, a diesel engine, a gasoline engine, a compressor, a hydraulic machine and the like.

At present, the following problems exist in the cutting process of the piston ring: a. in the traditional mode, a poured cylindrical piston ring blank is cut into a single piston ring through a lathe, at the moment, the piston ring is in a closed state, and the piston ring needs to be subjected to notch processing; b. at present, the fixed positioning of the cutting processing equipment for the piston ring cut is generally fixed and limited on a plane, and other planes are not limited, so that the end face of the piston ring is easy to deform up and down during cutting; c. the existing equipment generally performs cutting processing on a piston ring with a certain specification, and the equipment can not perform cutting processing on piston rings with different specifications.

Disclosure of Invention

Technical problem to be solved

The invention provides a gasoline engine piston ring production and manufacturing cutting processing line, which can solve the following problems in the cutting processing process of a piston ring: a. in the traditional mode, a poured cylindrical piston ring blank is cut into a single piston ring through a lathe, at the moment, the piston ring is in a closed state, and the piston ring needs to be subjected to notch processing; b. at present, the fixed positioning of the cutting processing equipment for the piston ring cut is generally fixed and limited on a plane, and other planes are not limited, so that the end face of the piston ring is easy to deform up and down during cutting; c. the existing equipment generally performs cutting processing on a piston ring with a certain specification, and the equipment can not perform cutting processing on piston rings with different specifications.

(II) technical scheme

In order to achieve the purpose, the invention adopts the following technical scheme: a gasoline engine piston ring production, manufacturing and cutting processing assembly line comprises a base, a support frame, a cutting mechanism, a fixing mechanism and a discharge hole, wherein the base is provided with the fixing mechanism, the discharge hole is formed in the end face of the right side of the base, the bottom of the support frame is welded on the left side of the upper end face of the base, the support frame is integrally of an L-shaped structure, the cutting mechanism is installed on the lower end face of the top of the support frame, and the cutting mechanism is located above the fixing mechanism; wherein:

the cutting mechanism comprises a cutting knife, a mounting block, a connecting shaft, a lifting screw rod, a mounting frame, a supporting block, a rotating gear, a driving branch chain, a limiting branch chain, a pressing ring, a connecting frame and a lifting cylinder, wherein the lifting cylinder is fixed on the lower end face of the top of the supporting frame, the output end of the lifting cylinder is connected with the upper end face of the top of the connecting frame, the connecting frame is of a hollow shell cylindrical structure with an opening at the lower end, the lower end face of the bottom of the connecting frame is connected with the pressing ring, the pressing ring is integrally of a circular ring structure, notches are formed in the upper end face and the lower end face of the pressing ring, the cutting knife is arranged in each notch, the cutting knife is fixedly mounted on the mounting block, the middle part of the upper end face of the mounting block is rotatably connected with the lower end of the connecting shaft through a, the lifting screw rod is sleeved with a rotating gear, internal threads begin to be arranged on the inner side wall of the rotating gear, the rotating gear is connected with the lifting screw rod in a threaded connection mode, the rotating gear is connected with a driving branched chain in a gear meshing mode, the lower end face of the rotating gear is rotatably connected with a supporting block, the supporting block is integrally of an annular structure, the mounting frame is integrally of a shell structure with a hollow inner portion, the supporting block is fixed on the lower end face in the mounting frame, and a limiting branched chain is fixed to the top of the mounting frame.

The fixing mechanism comprises a moving groove, an outer clamping block, an inner clamping block, a worm, a rotating shaft, a worm wheel and a rotating handle, the moving groove is formed in the upper end face of the base along the central circumferential direction of the base, the worm is respectively located at the left side and the front and rear end positions of the upper end face of the base, the worm is inserted into the left side of the moving groove through a bearing, the outer clamping block is arranged on the worm through a thread connecting sleeve, the inner clamping block is located on the right side of the outer clamping block, the thread turning directions of the inner clamping block and the outer clamping block in the moving groove on the left side are opposite, the rotating shaft is inserted into the two moving grooves in the front and rear sides of the upper end face of the base through the bearing, the outer clamping block with opposite thread turning directions is sleeved on the rotating shaft through the thread connecting sleeve, the inner clamping block with opposite, the thread turning directions of an outer clamping block in a moving groove in the front side of the upper end face of the base and an inner clamping block in a rear moving groove are the same, the thread turning directions of an inner clamping block in the moving groove in the front side of the upper end face of the base and an outer clamping block in the rear moving groove are the same, a worm wheel is sleeved at the middle position of the rotating shaft and meshed with the worm, the rotating shaft penetrates through the front end face of the base, and the end part of the rotating shaft is fixedly connected with a rotating handle.

Preferably, the limiting branched chain comprises a limiting hole, a limiting groove and a limiting plate, the central position of the top of the mounting frame is provided with the limiting hole, the upper end of the lifting screw rod penetrates through the limiting hole, the side wall of the upper end of the lifting screw rod is provided with the limiting groove, the limiting plate is installed in the limiting hole, and the limiting plate is located in the limiting groove.

Preferably, the drive branch chain include drive gear, drive shaft and driving motor, running gear be connected with drive gear through the gear engagement mode, the drive gear cover is established in the drive shaft, the drive shaft both ends are fixed on the mounting bracket through the bearing, driving motor passes through the motor cabinet to be fixed on the mounting bracket up end, the driving motor output is connected with the drive shaft through the shaft coupling.

Preferably, the upper end surface of the supporting block is provided with a rectangular sliding block along the axis, the lower end surface of the rotating gear is provided with a rectangular sliding groove along the axis, the rotating gear is rotatably connected with the supporting block through the rectangular sliding block, and the side wall of the rectangular sliding groove is provided with a rolling steel ball.

Preferably, the outer clamping block side wall be provided with the dovetail block, the inner clamping block side wall also be provided with the dovetail block, the dovetail has been seted up to the shifting chute side wall, outer clamping block with the inner clamping block all through dovetail block and dovetail cooperation and shifting chute looks sliding connection.

(III) advantageous effects

1. The invention provides a gasoline engine piston ring production and manufacturing cutting processing line, which can solve the following problems in the cutting processing process of a piston ring: a. in the traditional mode, a poured cylindrical piston ring blank is cut into a single piston ring through a lathe, at the moment, the piston ring is in a closed state, and the piston ring needs to be subjected to notch processing; b. at present, the fixed positioning of the cutting processing equipment for the piston ring cut is generally fixed and limited on a plane, and other planes are not limited, so that the end face of the piston ring is easy to deform up and down during cutting; c. the existing equipment generally performs cutting processing on a piston ring with a certain specification, and the equipment can not perform cutting processing on piston rings with different specifications.

2. The fixing mechanism designed by the invention simultaneously clamps and fixes the inside and the outside of the piston ring by utilizing the screwing direction of the threads, the rotating shaft and the worm rotate simultaneously by rotating the rotating handle, and the piston ring is clamped and fixed by utilizing the different screwing directions of the threads of the outer clamping block and the inner clamping block, so that the inside and the outside of the piston ring are simultaneously positioned.

3. According to the cutting mechanism designed by the invention, the end face of the piston ring is firstly pressed through the compression ring by using the lifting cylinder, then the driving motor is started, the lifting screw rod is driven to move downwards and rotate through the rotating gear, the mounting block moves downwards through the connecting shaft which is rotationally connected with the lifting screw rod, and then the cutting knife is used for performing incision processing on the piston ring.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a front cross-sectional view of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 taken along line A-A in the present specification;

FIG. 3 is a schematic view of the structure of FIG. 1 along the line B-B;

FIG. 4 is a schematic view of the structure of FIG. 2 in the direction C-C according to the present invention;

fig. 5 is a partial enlarged view of fig. 1 taken along line D in the present specification.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. In this process, the width of the lines or the size of the components in the drawings may be exaggerated for clarity and convenience of description.

The following terms are defined based on the functions of the present invention, and may be different depending on the intention of the user or the operator or the convention. Therefore, these terms are defined based on the entire contents of the present specification.

As shown in fig. 1 to 5, a gasoline engine piston ring production manufacturing cutting assembly line includes a base 1, a support frame 2, a cutting mechanism 3, a fixing mechanism 4 and a discharge port 5, the base 1 is provided with the fixing mechanism 4, the discharge port 5 is provided on the end face of the right side of the base 1, the support frame 2 is welded on the left side of the upper end face of the base 1, the support frame 2 is integrally of an L-shaped structure, the cutting mechanism 3 is installed on the lower end face of the top of the support frame 2, the cutting mechanism 3 is located above the fixing mechanism 4, when the gasoline engine piston ring production manufacturing cutting assembly line works specifically, a piston ring to be cut is placed on the upper end face of the base 1, the piston ring is fixed through the fixing mechanism 4, then the piston ring is cut through the cutting mechanism 3 installed on the support frame 2, and waste materials after.

Fixing mechanism 4 include shifting chute 41, outer clamping piece 42, interior clamping piece 43, worm 44, axis of rotation 45, worm wheel 46 and turning handle 47, base 1 up end seted up shifting chute 41 along its central circumference, and be located the left side of base 1 up end and front and back position department respectively, worm 44 alternates at the left through the bearing in shifting chute 41, outer clamping piece 42 overlaps through threaded connection and establishes on worm 44, interior clamping piece 43 establishes on worm 44 through the thread connection cover, interior clamping piece 43 is located the right side of outer clamping piece 42, and the interior clamping piece 43 that is located left side shifting chute 41 and outer clamping piece 42 screw thread turn to opposite, axis of rotation 45 alternates at two that lie in base 1 up end front and back side in shifting chute 41 through the bearing in the cover, it is equipped with two opposite through threaded connection screw thread turn to outer clamping piece 42 on the axis of rotation 45, the rotating shaft 45 is also sleeved with two inner clamping blocks 43 with opposite thread turning directions, the thread turning directions of an outer clamping block 42 in a moving groove 41 on the front side of the upper end face of the base 1 and an inner clamping block 43 in a rear moving groove 41 are the same, the thread turning directions of the inner clamping block 43 in the moving groove 41 on the front side of the upper end face of the base 1 and an outer clamping block in the rear moving groove 41 are the same, the middle position of the rotating shaft 45 is sleeved with a worm wheel 46, the worm wheel 46 is meshed and connected with the worm 44, the rotating shaft 45 penetrates through the front end face of the base 1, the end part of the rotating shaft is fixedly connected with a rotating handle 47, in the specific work, the piston ring is placed on the base 1, the worm piston ring is ensured to be placed between the outer clamping block 42 and the inner clamping block 43 in the same moving groove 41, the rotating shaft 45 starts to rotate by manually rotating the rotating handle 47, and the

worm wheels

46 and 44 drive the rotating shaft 44 to rotate, and then the outer clamping block 42 and the inner clamping block start to move to clamp the piston ring, when the cutting processing of the piston ring is completed, the rotating handle 47 is reversed, so that the outer clamping block 42 and the inner clamping block 43 move, and the clamping of the piston ring is released.

Outer clamping block 42 lateral wall be provided with the dovetail piece, interior clamping block 43 lateral wall also be provided with the dovetail piece, the dovetail has been seted up to the shifting chute 41 lateral wall, outer clamping block 42 with interior clamping block 43 all is provided with the dovetail piece through dovetail piece and dovetail cooperation and shifting chute 41 looks sliding connection on outer clamping block 42 and interior clamping block 43 lateral wall for outer clamping block 42 and interior clamping block 43 more steady removal in shifting chute 41 avoid it to appear crooked phenomenon.

The cutting mechanism 3 comprises a cutting knife 31, a mounting block 32, a connecting shaft 33, a lifting screw rod 34, a mounting frame 35, a supporting block 36, a rotating gear 37, a driving branched chain 38, a limiting branched chain 39, a pressing ring 310, a connecting frame 311 and a lifting cylinder 312, wherein the lifting cylinder 312 is fixed on the lower end surface of the top of the supporting frame 2, the output end of the lifting cylinder 312 is connected with the upper end surface of the top of the connecting frame 311, the connecting frame 311 is of a hollow shell cylindrical structure with an open lower end, the lower end surface of the bottom of the connecting frame 311 is connected with the pressing ring 310, the pressing ring 310 is of a circular ring structure as a whole, notches are formed in the upper end surface and the lower end surface of the pressing ring 310, the cutting knife 31 is arranged in each notch, the cutting knife 31 is fixedly mounted on the mounting block 32, the middle part of the upper end surface of the mounting block 32 is rotatably connected with the lower end of, the outer side wall of the lifting screw rod 34 is provided with an external thread, the lifting screw rod 34 is sleeved with a rotating gear 37, the inner side wall of the rotating gear 37 starts to be provided with an internal thread, the rotating gear 37 is connected with the lifting screw rod 34 in a threaded connection mode, the rotating gear 37 is connected with a driving branched chain 38 in a gear meshing mode, the lower end face of the rotating gear 37 is rotatably connected with the supporting block 36, the supporting block 36 is integrally of an annular structure, the mounting frame 35 is integrally of a shell structure with a hollow inner part, the supporting block 36 is fixed on the lower end face of the inner part of the mounting frame 35, a limiting branched chain 39 is fixed at the top of the mounting frame 35, during specific work, the lifting cylinder 312 is started, under the action of the lifting cylinder 312, the connecting frame 311 is pushed to push the pressing ring 310 to move downwards and to press the piston, when the compression ring 310 compresses and fixes the piston ring, the driving branch chain 38 is started, the rotating gear 37 starts to rotate under the driving of the driving branch chain 38, the lifting screw rod 34 connected through threads starts to move downwards and rotate, the connecting shaft 33 moves downwards, the mounting block 32 moves downwards, the cutting knife 31 is synchronously driven to move downwards, the cutting knife 31 cuts when penetrating through the cut of the compression ring 310 and opening downwards, and after the cutting is finished, the driving motor 383 rotates reversely, the cutting knife 31 moves upwards, and meanwhile, the lifting cylinder 312 is started, so that the compression ring 310 moves upwards until the initial position is reached.

The limiting branched chain 39 comprises a limiting hole 391, a limiting groove 392 and a limiting plate 393, the limiting hole 391 is formed in the center of the top of the mounting frame 35, the upper end of the lifting screw rod 34 penetrates through the limiting hole 391, the limiting groove 392 is formed in the side wall of the upper end of the lifting screw rod 34, the limiting plate 393 is installed in the limiting hole 391 and is located in the limiting groove 392, the limiting groove 392 is formed in the lifting screw rod 34, meanwhile, the limiting plate 393 is arranged in the limiting groove 392 and limits the lifting range of the lifting screw rod 34, and the collision between the mounting block 32 and the compression ring 310 and the collision between the mounting block 32 and the mounting frame 35 caused by the overlarge moving range of the lifting screw rod 34 are avoided.

Drive branched chain 38 include drive gear 381, drive shaft 382 and driving motor 383, rotating gear 37 be connected with drive gear 381 through the gear engagement mode, drive gear 381 overlaps and establishes on drive shaft 382, drive shaft 382 both ends are fixed on mounting bracket 35 through the bearing, driving motor 383 passes through the motor cabinet and fixes on the mounting bracket 35 up end, driving motor 383 output is connected with drive shaft 382 through the shaft coupling, and during concrete work, start driving motor 383, driving motor 383's output passes through the shaft coupling and drives drive shaft 382 and rotate, and drive shaft 382 drives the drive gear 381 of establishing above that and rotate, and then drive rotating gear 37 through drive gear 381 and rotate.

The upper end surface of the supporting block 36 is provided with a rectangular sliding block along the axis, the lower end surface of the rotating gear 37 is provided with a rectangular sliding groove along the axis, the rotating gear 37 is rotatably connected with the supporting block 36 through the rectangular sliding block, the side wall of the rectangular sliding groove is provided with rolling steel balls, the upper end surface of the supporting block 36 is provided with the rectangular sliding block, so that the rotating gear 37 can stably rotate on the supporting block 36 through the rectangular sliding block, the rolling steel balls are arranged on the side wall of the rectangular sliding groove of the rotating gear 37, the sliding friction between the rectangular sliding block and the rotating gear 37 is changed into rolling friction, the friction force is reduced, and the rotating gear 37 can more smoothly rotate.

The invention comprises the following steps:

the first step is as follows: placing a piston ring to be processed on the base 1, and fixedly clamping the piston ring through an outer clamping block 42 and an inner clamping block 43 on the fixing mechanism 4;

the second step is that: starting the lifting cylinder 312, pushing the compression ring 310 to press the piston ring, starting the driving motor 383 to enable the lifting screw rod 34 to move downwards, and further driving the cutting knife 31 to start cutting the piston ring downwards through the mounting block 32;

the third step: after the cutting is finished, the waste materials generated by the cutting are discharged through the discharge port 5, the driving motor 383 rotates reversely, the cutting blade 31 is driven to move upwards by driving the lifting screw rod 34, and the compression ring 310 and the mounting frame 35 are moved upwards by the lifting cylinder 312 until the initial position is returned.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a gasoline engine piston ring production manufacturing cutting assembly line, includes base (1), support frame (2), cutting mechanism (3), fixed establishment (4) and discharge gate (5), its characterized in that: the cutting machine is characterized in that a fixing mechanism (4) is arranged on the base (1), a discharge hole (5) is formed in the end face of the right side of the base (1), the bottom of the support frame (2) is welded to the left side of the upper end face of the base (1), the support frame (2) is integrally of an L-shaped structure, a cutting mechanism (3) is arranged on the lower end face of the top of the support frame (2), and the cutting mechanism (3) is located above the fixing mechanism (4); wherein:

the cutting mechanism (3) comprises a cutting knife (31), an installation block (32), a connecting shaft (33), a lifting screw rod (34), an installation frame (35), a supporting block (36), a rotating gear (37), a driving branched chain (38), a limiting branched chain (39), a pressing ring (310), a connecting frame (311) and a lifting cylinder (312), wherein the lifting cylinder (312) is fixed on the lower end face of the top of the supporting frame (2), the output end of the lifting cylinder (312) is connected with the upper end face of the top of the connecting frame (311), the connecting frame (311) is of a hollow shell cylindrical structure with an open lower end, the lower end face of the bottom of the connecting frame (311) is connected with the pressing ring (310), the pressing ring (310) is integrally of a circular ring structure, notches are formed in the upper end face and the lower end face of the pressing ring (310), the cutting knife (31) is arranged in each notch, the cutting knife (31) is fixedly installed on, the middle part of the upper end face of the mounting block (32) is rotatably connected with the lower end of the connecting shaft (33) through a bearing, the upper end of the connecting shaft (33) is rotatably connected with the lifting screw rod (34) through a bearing, an external thread is arranged on the outer side wall of the lifting screw rod (34), the lifting screw rod (34) is sleeved with a rotating gear (37), an internal thread is arranged on the inner side wall of the rotating gear (37), the rotating gear (37) is connected with the lifting screw rod (34) in a threaded connection mode, the rotating gear (37) is connected with a driving branched chain (38) in a gear meshing mode, the lower end face of the rotating gear (37) is rotatably connected with the supporting block (36), the supporting block (36) is integrally of an annular structure, the mounting frame (35) is integrally of a hollow shell structure, and the supporting block (36) is fixed on the lower end face of the inside of the, a limiting branched chain (39) is fixed at the top of the mounting frame (35);

fixed establishment (4) including shifting chute (41), outer clamping block (42), interior clamping block (43), worm (44), axis of rotation (45), worm wheel (46) and turning handle (47), base (1) up end seted up shifting chute (41) along its central circumference, and be located the left side and the front and back position department of base (1) up end respectively, worm (44) alternate in left through the bearing in shifting chute (41), outer clamping block (42) establish on worm (44) through threaded connection cover, interior clamping block (43) are located the right side of outer clamping block (42), and interior clamping block (43) that are located in left side shifting chute (41) and outer clamping block (42) screw thread direction of turning is opposite, axis of rotation (45) alternate in two of base (1) up end front and back side in shifting chute (41) through the bearing The rotating shaft (45) is sleeved with two outer clamping blocks (42) with opposite thread turning directions through threaded connection, the rotating shaft (45) is also sleeved with two inner clamping blocks (43) with opposite screw thread turning directions, the screw thread turning directions of an outer clamping block (42) in a moving groove (41) on the front side of the upper end surface of the base (1) and an inner clamping block (43) in a rear moving groove (41) are the same, the screw thread turning directions of the inner clamping block (43) in the moving groove (41) on the front side of the upper end surface of the base (1) and the outer clamping block in the rear moving groove (41) are the same, a worm wheel (46) is sleeved at the middle position of the rotating shaft (45), the worm wheel (46) is meshed and connected with the worm (44), the rotating shaft (45) penetrates through the front end face of the base (1), and the end part of the rotating shaft is fixedly connected with a rotating handle (47).

2. The gasoline engine piston ring production and manufacturing cutting processing line according to claim 1, characterized in that: the limiting branched chain (39) comprises a limiting hole (391), a limiting groove (392) and a limiting plate (393), the limiting hole (391) is formed in the center of the top of the mounting frame (35), the upper end of the lifting screw rod (34) penetrates through the limiting hole (391), the limiting groove (392) is formed in the side wall of the upper end of the lifting screw rod (34), the limiting plate (393) is installed in the limiting hole (391), and the limiting plate (393) is located in the limiting groove (392).

3. The gasoline engine piston ring production and manufacturing cutting processing line according to claim 1, characterized in that: drive branch chain (38) including drive gear (381), drive shaft (382) and driving motor (383), rotating gear (37) be connected with drive gear (381) through gear engagement, drive gear (381) cover is established on drive shaft (382), drive shaft (382) both ends are fixed on mounting bracket (35) through the bearing, driving motor (383) are fixed on mounting bracket (35) up end through the motor cabinet, driving motor (383) output is connected with drive shaft (382) through the shaft coupling.

4. The gasoline engine piston ring production and manufacturing cutting processing line according to claim 1, characterized in that: the supporting shoe (36) up end along its axle center be provided with the rectangle slider, the rectangle spout has been seted up along its axle center to the terminal surface under the rotating gear (37), rotating gear (37) pass through the rectangle slider with supporting shoe (36) are connected mutually in the rotation, rectangle spout lateral wall is provided with the rolling steel ball.

5. The gasoline engine piston ring production and manufacturing cutting processing line according to claim 1, characterized in that: outer clamping block (42) lateral wall be provided with the dovetail piece, interior clamping block (43) lateral wall also be provided with the dovetail piece, the dovetail has been seted up to shifting chute (41) lateral wall, outer clamping block (42) with interior clamping block (43) all through dovetail piece and dovetail cooperation and shifting chute (41) looks sliding connection.