CN113579775A - Fixture device for turning crankshaft - Google Patents

Fixture device for turning crankshaft Download PDF

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Publication number
CN113579775A
CN113579775A CN202110841394.3A CN202110841394A CN113579775A CN 113579775 A CN113579775 A CN 113579775A CN 202110841394 A CN202110841394 A CN 202110841394A CN 113579775 A CN113579775 A CN 113579775A
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CN
China
Prior art keywords
outer end
seat
mounting
crankshaft
hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110841394.3A
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Chinese (zh)
Inventor
袁志
喻小宁
谢昌国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Meixin Yingshen Machinery Co ltd
Original Assignee
Chongqing Meixin Yingshen Machinery Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Meixin Yingshen Machinery Co ltd filed Critical Chongqing Meixin Yingshen Machinery Co ltd
Priority to CN202110841394.3A priority Critical patent/CN113579775A/en
Publication of CN113579775A publication Critical patent/CN113579775A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/001—Arrangements compensating weight or flexion on parts of the machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q2703/00—Work clamping
    • B23Q2703/02—Work clamping means
    • B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material
    • B23Q2703/105—Devices for clamping workpieces of a particular form or made from a particular material for clamping a crankshaft

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

The invention discloses a vehicle crankshaft fixture device, which comprises a connecting seat which is integrally in a cylindrical structure; a mounting seat is vertically and outwardly arranged at the upper side of one end of the connecting seat, and a mounting seat vertical position control structure is arranged between the mounting seat and the connecting seat to control the vertical position of the mounting seat; a mounting hole penetrates through the center of the end face of the mounting seat, a cylindrical spring jacket is arranged in the mounting hole, a plurality of tightening holes with outer ends opened are uniformly distributed at the outer end of the spring jacket in the thickness direction, and the outer end of the inner hole of the spring jacket forms a clamping end and is used for the end part of a crankshaft to be inserted; the mounting hole comprises a conical hole section with the outer end of the outer end larger in diameter and the inner end of the outer end smaller in diameter, the spring jacket comprises a frustum section with the outer end of the outer end larger in diameter and the inner end of the outer end smaller in diameter, and the frustum section and the conical hole section are arranged in a matched mode; the clamping device has the advantages of simple structure, reasonable design, higher applicability and capability of facilitating clamping operation and improving the processing quality.

Description

Fixture device for turning crankshaft
Technical Field
The invention belongs to the technical field of crankshaft machining, and particularly relates to a crankshaft turning clamp device.
Background
As shown in fig. 6, the crankshaft manufacturing process includes a step of obtaining a crankshaft blank by casting or forging, and a step of machining. When machining crankshafts, crankshaft throws are usually obtained by turning.
During turning of the crank throw of the crankshaft, the corresponding clamping device is required to clamp, and then turning is completed. The existing clamping device has the following problems when clamping is finished and machining is carried out after the clamping: 1, the existing clamping device is inconvenient for clamping operation and workpiece taking and placing; 2 the existing clamping device can not clamp different crankshafts, so that the applicability is poor; 3 after the existing clamping device clamps, when the crankshaft is driven to rotate, the axis line of the crankshaft deviates from the central line of the clamping device, so that the processing quality does not meet the requirement.
Therefore, how to provide a simple structure, reasonable in design can make things convenient for the clamping operation more, and the suitability is higher, can improve processingquality's car bent axle fixture device, becomes the technical problem that technical staff in the field awaited the solution.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a simple structure, reasonable in design can make things convenient for the clamping operation more, and the suitability is higher, can improve processingquality's car bent axle fixture device.
In order to solve the technical problems, the invention adopts the following technical scheme:
a turning crankshaft fixture device comprises a connecting seat which is integrally in a cylindrical structure; the device is characterized in that the upper side of one end of the connecting seat is vertically and outwardly provided with a mounting seat, and a mounting seat vertical position control structure is arranged between the mounting seat and the connecting seat to control the vertical position of the mounting seat; a mounting hole penetrates through the center of the end face of the mounting seat, a cylindrical spring jacket is arranged in the mounting hole, a plurality of tightening holes with outer ends opened are uniformly distributed at the outer end of the spring jacket in the thickness direction, and the outer end of the inner hole of the spring jacket forms a clamping end and is used for the end part of a crankshaft to be inserted; the mounting hole comprises a conical hole section with the outer end of the outer end larger in diameter and the inner end of the outer end smaller in diameter, the spring jacket comprises a frustum section with the outer end of the outer end larger in diameter and the inner end of the outer end smaller in diameter, and the frustum section and the conical hole section are arranged in a matched mode; the connecting structure is arranged at the inner end of the spring jacket, the connecting structure is provided with a connecting end and penetrates out of a yielding hole arranged in the middle of the end face of the connecting seat, the connecting end is used for being connected with the tension structure, the spring jacket moves inwards in the mounting hole, and the upper end of the spring jacket is tightened to clamp the crankshaft; the outer end of the mounting seat is provided with an anti-rotation structure which is provided with an anti-rotation supporting surface attached to and supported on one side surface of the crankshaft fan plate; the lower side of one end of the connecting seat is connected with a counterweight structure.
Therefore, when the crankshaft clamp device works, the end part of the crankshaft is inserted into the spring clamp sleeve, and the anti-rotation support surface of the anti-rotation structure is attached to and supported on one side surface of the crankshaft sector plate so as to limit the rotation of the crankshaft. After that, a tensile force is applied by a tensile force mechanism connected to the connection end of the connection structure, so that the spring clamp sleeve moves inward in the mounting hole, and the upper end of the spring clamp sleeve is tightened to clamp the crankshaft. In the device, the counterweight structure is arranged, so that the central line of the crankshaft and the central line of the device can be better superposed when the crankshaft is driven to rotate. And the interval between mount pad and the counter weight structure can be adjusted, can be better according to the clamping needs with the interval between adjustment mount pad and the counter weight structure to make the device have better suitability. The device also has the advantage of convenient clamping operation, and is more convenient to use.
As optimization, the end face of the connecting seat is provided with a strip-shaped and vertical mounting groove; the connecting structure comprises a connecting block arranged in the mounting groove, and the bottom surface of the mounting groove and the inner side surface of the connecting block are arranged at intervals; one side of the connecting block is connected with the inner end of the spring jacket; the connecting shaft is arranged in the abdicating hole in the connecting seat, the inner end of the connecting shaft is connected with the connecting block through a vertical guide structure, and the outer end of the connecting shaft forms the connecting end.
Like this, connection structure is simpler to link to each other through vertical guide structure between the connecting axle is inner and the connecting block, make the mount pad can follow the vertical removal of connecting seat terminal surface better, with the interval between adjustment counter weight structure and the mount pad better.
As optimization, the mounting groove is vertically arranged in a penetrating manner, a cover plate is arranged at the upper end of the connecting seat and corresponding to the upper end of the mounting groove, and an insert is fixedly arranged at the lower end of the mounting groove.
Therefore, the structural design is more reasonable, and the processing and the manufacturing are more convenient.
As optimization, the vertical guide structure comprises a T-shaped connecting groove in the connecting block, and a T-shaped connector is formed at the inner end of the connecting shaft and can be arranged in a vertically sliding matched mode in the T-shaped connecting groove.
Like this, adopt T shape spread groove and T shape connector to link to each other, connect more reliably to can make connecting block and connecting axle vertical slip better.
Preferably, a connecting cylinder is arranged between the connecting block and the spring jacket, and two ends of the connecting cylinder are respectively connected with the connecting block and the spring jacket.
Therefore, the connection between the connecting block and the spring jacket is more convenient. Further, the connecting cylinder and the connecting block are integrally formed. Thus, the structural design is more reasonable.
As optimization, the mounting seat vertical position control structure comprises a connecting plate attached to the upper side of one end face of the connecting seat, and the inner end of the mounting seat is connected to the outer side surface of the connecting plate; the connecting plate both sides are equipped with vertical arrangement and are rectangular shape structure's connecting hole, correspond respectively on the connecting seat the connecting hole is equipped with the vertical connecting screw that is the interval and sets up, and the connecting screw outer end is worn out from the connecting hole internal level, is equipped with coupling nut in the connecting screw outer end.
Therefore, the vertical position control structure of the mounting seat is simpler, and the vertical position of the mounting seat can be adjusted more conveniently.
As optimization, the counterweight structure comprises a counterweight block connected to the lower side of one end of the connecting seat, and four counterweight columns are detachably connected to the outer end face of the counterweight block in parallel.
Like this, the counter weight structure is simpler to still conveniently adjust the number of counter weight notes.
Preferably, the counterweight columns are respectively connected with the counterweight blocks through fixing screws.
Like this, more add the convenience and tear heavy post of assembly and balancing weight open, structural design is simple more reasonable.
As optimization, a vertical limiting screw is arranged on the balancing weight, and the upper end of the vertical limiting screw extends to the upper side surface of the balancing weight and can be abutted and supported on the lower side end face of the connecting plate.
Like this, design vertical stop screw for its butt is in order to restrict its position better on the connecting plate, and the design is more reasonable.
As optimization, the anti-rotation structure comprises a circular mounting sleeve which is fixedly mounted at the outer end of the mounting seat, a limiting block is arranged on one side of the outer end of the mounting sleeve, a limiting cushion block is arranged on the inner side face of the limiting block, a horizontal limiting rod is arranged on the limiting cushion block, the lower end of the surface of the limiting cushion block protrudes outwards to form a limiting convex block, and the surface of the limiting convex block and the end face of the limiting rod are located on the same vertical plane and jointly form the anti-rotation supporting face.
Therefore, the anti-rotation structure is simpler and the design is more reasonable. Furthermore, the tightening openings are three and are uniformly distributed along the circumferential direction.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a sectional view taken along line a-a of fig. 2 (the crankshaft is not shown).
Fig. 4 is a top view of fig. 2 (crankshaft not shown).
Fig. 5 is a schematic structural view of the connection seat not shown in fig. 1.
Fig. 6 is a schematic structural view of the crankshaft of fig. 1.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
referring to fig. 1 to 6: a turning crankshaft fixture device comprises a connecting seat 1 which is integrally in a cylindrical structure; the upper side of one end of the connecting seat is vertically and outwardly provided with a mounting seat 2, and a mounting seat vertical position control structure is arranged between the mounting seat and the connecting seat to control the vertical position of the mounting seat; a mounting hole penetrates through the center of the end face of the mounting seat, a cylindrical spring jacket 3 is arranged in the mounting hole, a plurality of tightening ports 4 with outer ends opened are uniformly distributed at the outer end of the spring jacket in the thickness direction, and the outer end of the inner hole of the spring jacket forms a clamping end for inserting the end part of a crankshaft 5; the mounting hole comprises a conical hole section with the outer end of the outer end larger in diameter and the inner end of the outer end smaller in diameter, the spring jacket comprises a frustum section 6 with the outer end of the outer end larger in diameter and the inner end of the outer end smaller in diameter, and the frustum section and the conical hole section are arranged in a matched mode; the connecting structure is arranged at the inner end of the spring jacket, the connecting structure is provided with a connecting end and penetrates out of a yielding hole arranged in the middle of the end face of the connecting seat, the connecting end is used for being connected with the tension structure, the spring jacket moves inwards in the mounting hole, and the upper end of the spring jacket is tightened to clamp the crankshaft; the outer end of the mounting seat is provided with an anti-rotation structure which is provided with an anti-rotation supporting surface attached to and supported on one side surface of the crankshaft fan plate; a counterweight structure 7 is connected with the lower side of one end of the connecting seat.
Therefore, when the crankshaft clamp device works, the end part of the crankshaft is inserted into the spring clamp sleeve, and the anti-rotation support surface of the anti-rotation structure is attached to and supported on one side surface of the crankshaft sector plate so as to limit the rotation of the crankshaft. After that, a tensile force is applied by a tensile force mechanism connected to the connection end of the connection structure, so that the spring clamp sleeve moves inward in the mounting hole, and the upper end of the spring clamp sleeve is tightened to clamp the crankshaft. In the device, the counterweight structure is arranged, so that the central line of the crankshaft and the central line of the device can be better superposed when the crankshaft is driven to rotate. And the interval between mount pad and the counter weight structure can be adjusted, can be better according to the clamping needs with the interval between adjustment mount pad and the counter weight structure to make the device have better suitability. The device also has the advantage of convenient clamping operation, and is more convenient to use.
In the specific embodiment, the end surface of the connecting seat is provided with a strip-shaped and vertical mounting groove; the connecting structure comprises a connecting block 8 arranged in the mounting groove, and the bottom surface of the mounting groove and the inner side surface of the connecting block are arranged at intervals; one side of the connecting block is connected with the inner end of the spring jacket; a connecting shaft 9 is arranged in the abdicating hole on the connecting seat, the inner end of the connecting shaft is connected with the connecting block through a vertical guide structure, and the outer end of the connecting shaft forms the connecting end.
Like this, connection structure is simpler to link to each other through vertical guide structure between the connecting axle is inner and the connecting block, make the mount pad can follow the vertical removal of connecting seat terminal surface better, with the interval between adjustment counter weight structure and the mount pad better.
In this embodiment, the mounting groove is vertically arranged to penetrate through, a cover plate 10 is arranged on the upper end of the connecting seat and corresponding to the upper end of the mounting groove, and an insert 11 is fixedly mounted on the lower end of the mounting groove.
Therefore, the structural design is more reasonable, and the processing and the manufacturing are more convenient.
In this embodiment, the vertical guide structure includes the T-shaped connecting groove on the connecting block, but the connecting axle inner forms T-shaped connector and vertical gliding cooperation sets up in the T-shaped connecting groove.
Like this, adopt T shape spread groove and T shape connector to link to each other, connect more reliably to can make connecting block and connecting axle vertical slip better.
In this embodiment, a connecting cylinder 12 is disposed between the connecting block and the spring jacket, and two ends of the connecting cylinder are connected to the connecting block and the spring jacket respectively.
Therefore, the connection between the connecting block and the spring jacket is more convenient. Further, the connecting cylinder and the connecting block are integrally formed. Thus, the structural design is more reasonable.
In the specific embodiment, the mounting seat vertical position control structure comprises a connecting plate 13 attached to the upper side of one end face of the connecting seat, and the inner end of the mounting seat is connected to the outer side surface of the connecting plate; the connecting plate both sides are equipped with the connecting hole 14 that vertical arrangement just is rectangular shape structure, correspond respectively on the connecting seat the connecting screw rod 15 that the connecting hole set up is vertical to be the interval, and the connecting screw rod outer end is worn out from the connecting hole level, is equipped with coupling nut 16 at the connecting screw rod outer end.
Therefore, the vertical position control structure of the mounting seat is simpler, and the vertical position of the mounting seat can be adjusted more conveniently.
In this embodiment, the counterweight structure includes a counterweight 17 connected to the lower side of one end of the connecting base, and four counterweight columns 18 detachably connected to the outer end face of the counterweight side by side.
Like this, the counter weight structure is simpler to still conveniently adjust the number of counter weight notes.
In this embodiment, the weight posts are connected to the weight blocks by fixing screws, respectively.
Like this, more add the convenience and tear heavy post of assembly and balancing weight open, structural design is simple more reasonable.
In this embodiment, be provided with vertical stop screw 19 on the balancing weight, vertical stop screw upper end extends to balancing weight upside surface top and can the butt support on connecting plate downside terminal surface.
Like this, design vertical stop screw for its butt is in order to restrict its position better on the connecting plate, and the design is more reasonable.
In this embodiment, prevent that the rotational structure includes that circular shape and installation fix the mounting sleeve 20 in the mount pad outer end, and mounting sleeve outer end one side is provided with stopper 21, and the stopper medial surface is provided with spacing cushion 22, is equipped with horizontally gag lever post 23 on the spacing cushion, and the outside protrusion of spacing cushion surface lower extreme forms spacing lug, and spacing lug surface and gag lever post terminal surface lie in same vertical plane and form jointly prevent changeing the holding surface.
Therefore, the anti-rotation structure is simpler and the design is more reasonable. Furthermore, the tightening openings are three and are uniformly distributed along the circumferential direction.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. A turning crankshaft fixture device comprises a connecting seat which is integrally in a cylindrical structure; the device is characterized in that the upper side of one end of the connecting seat is vertically and outwardly provided with a mounting seat, and a mounting seat vertical position control structure is arranged between the mounting seat and the connecting seat to control the vertical position of the mounting seat; a mounting hole penetrates through the center of the end face of the mounting seat, a cylindrical spring jacket is arranged in the mounting hole, a plurality of tightening holes with outer ends opened are uniformly distributed at the outer end of the spring jacket in the thickness direction, and the outer end of the inner hole of the spring jacket forms a clamping end and is used for the end part of a crankshaft to be inserted; the mounting hole comprises a conical hole section with the outer end of the outer end larger in diameter and the inner end of the outer end smaller in diameter, the spring jacket comprises a frustum section with the outer end of the outer end larger in diameter and the inner end of the outer end smaller in diameter, and the frustum section and the conical hole section are arranged in a matched mode; the connecting structure is arranged at the inner end of the spring jacket, the connecting structure is provided with a connecting end and penetrates out of a yielding hole arranged in the middle of the end face of the connecting seat, the connecting end is used for being connected with the tension structure, the spring jacket moves inwards in the mounting hole, and the upper end of the spring jacket is tightened to clamp the crankshaft; the outer end of the mounting seat is provided with an anti-rotation structure which is provided with an anti-rotation supporting surface attached to and supported on one side surface of the crankshaft fan plate; the lower side of one end of the connecting seat is connected with a counterweight structure.
2. The crankshaft fixture apparatus of claim 1, wherein: the end face of the connecting seat is provided with a strip-shaped and vertical mounting groove; the connecting structure comprises a connecting block arranged in the mounting groove, and the bottom surface of the mounting groove and the inner side surface of the connecting block are arranged at intervals; one side of the connecting block is connected with the inner end of the spring jacket; the connecting shaft is arranged in the abdicating hole in the connecting seat, the inner end of the connecting shaft is connected with the connecting block through a vertical guide structure, and the outer end of the connecting shaft forms the connecting end.
3. The crankshaft fixture apparatus of claim 2, wherein: the mounting groove is vertically arranged in a penetrating mode, a cover plate is arranged at the upper end of the connecting seat and corresponds to the upper end of the mounting groove, and an insert is fixedly installed at the lower end of the mounting groove.
4. The crankshaft fixture apparatus of claim 2, wherein: the vertical guide structure comprises a T-shaped connecting groove in the connecting block, and a T-shaped connector is formed at the inner end of the connecting shaft and can be arranged in the T-shaped connecting groove in a vertically sliding matched mode.
5. The crankshaft fixture apparatus of claim 1, wherein: a connecting cylinder is arranged between the connecting block and the spring jacket, and two ends of the connecting cylinder are respectively connected with the connecting block and the spring jacket.
6. The crankshaft fixture apparatus of claim 1, wherein: the vertical position control structure of the mounting seat comprises a connecting plate attached to the upper side of one end face of the connecting seat, and the inner end of the mounting seat is connected to the outer side surface of the connecting plate; the connecting plate both sides are equipped with vertical arrangement and are rectangular shape structure's connecting hole, correspond respectively on the connecting seat the connecting hole is equipped with the vertical connecting screw that is the interval and sets up, and the connecting screw outer end is worn out from the connecting hole internal level, is equipped with coupling nut in the connecting screw outer end.
7. The crankshaft fixture apparatus of claim 6, wherein: the counterweight structure comprises a counterweight block connected to the lower side of one end of the connecting seat, and four counterweight columns which are parallel and detachably connected to the outer end face of the counterweight block.
8. The crankshaft fixture apparatus of claim 7, wherein: the counterweight columns are respectively connected with the counterweight blocks through fixing screws.
9. The crankshaft fixture apparatus of claim 7, wherein: be provided with vertical stop screw on the balancing weight, vertical stop screw upper end extends to balancing weight upside surface top and can the butt support on connecting plate downside terminal surface.
10. The crankshaft fixture apparatus of claim 1, wherein: the anti-rotation structure comprises a circular mounting sleeve which is fixedly mounted at the outer end of the mounting seat, a limiting block is arranged on one side of the outer end of the mounting sleeve, a limiting cushion block is arranged on the inner side surface of the limiting block, a horizontal limiting rod is arranged on the limiting cushion block, the lower end of the surface of the limiting cushion block protrudes outwards to form a limiting lug, and the surface of the limiting lug and the end surface of the limiting rod are located on the same vertical plane and jointly form the anti-rotation supporting surface.
CN202110841394.3A 2021-07-26 2021-07-26 Fixture device for turning crankshaft Pending CN113579775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110841394.3A CN113579775A (en) 2021-07-26 2021-07-26 Fixture device for turning crankshaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110841394.3A CN113579775A (en) 2021-07-26 2021-07-26 Fixture device for turning crankshaft

Publications (1)

Publication Number Publication Date
CN113579775A true CN113579775A (en) 2021-11-02

Family

ID=78249833

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110841394.3A Pending CN113579775A (en) 2021-07-26 2021-07-26 Fixture device for turning crankshaft

Country Status (1)

Country Link
CN (1) CN113579775A (en)

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