CN107584305B - Clamp for turning crankshaft eccentric shaft - Google Patents
Clamp for turning crankshaft eccentric shaft Download PDFInfo
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- CN107584305B CN107584305B CN201710835171.XA CN201710835171A CN107584305B CN 107584305 B CN107584305 B CN 107584305B CN 201710835171 A CN201710835171 A CN 201710835171A CN 107584305 B CN107584305 B CN 107584305B
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- 239000003507 refrigerant Substances 0.000 description 3
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Abstract
The invention discloses a fixture for turning a crankshaft eccentric shaft, which can directly adjust the eccentric amount of the fixture to process crankshafts with different eccentric amounts without replacing parts. The fixture comprises a flange plate, a base, a pull plate positioning block, an inner taper sleeve, an outer taper sleeve and a shell; wherein the flange plate, the base and the shell are connected in sequence; the movable pulling plate is positioned in the long groove on one side of the base close to the flange plate; the positioning block, the inner taper sleeve and the outer taper sleeve are sequentially arranged on the other side of the base, and circular truncated cone-shaped through holes are respectively formed in the positioning block, the inner taper sleeve and the outer taper sleeve, so that a cavity with small two ends and large middle is formed between the positioning block and the outer taper sleeve, and an elastic chuck with the size matched with the cavity is arranged in the cavity; after the outer taper sleeve and the inner taper sleeve are connected by the fixed shaft, the fixed shaft penetrates through the slotted hole in the base to be fixedly connected with the pulling plate, so that a movable assembly of the clamp is formed, and the adjustment of the eccentric amount of the clamp is realized. The technical scheme of the invention can realize the processing of the crankshaft eccentric shafts with different eccentric amounts, and has fast switching process and low cost.
Description
Technical Field
The invention belongs to the technical field of machining, and particularly relates to a fixture for turning a crankshaft eccentric shaft.
Background
The compressor is the heart of the refrigerating system, and the main parts comprise a crank case, a piston, a crank shaft, a connecting rod, a motor and the like. The refrigerating cycle is realized by sucking low-temperature low-pressure refrigerant gas from the air suction pipe, driving the piston to compress the refrigerant gas through the motor, and discharging high-temperature high-pressure refrigerant gas to the air discharge pipe to provide power for the refrigerating cycle. The crankshaft is the most important component in the compressor, and it takes the force from the connecting rod and converts it into torque which is output through the crankshaft and drives other accessories connected thereto. The crankshaft is subjected to the combined action of centrifugal force of the rotating mass, periodically-changed gas inertia force and reciprocating inertia force, so that the crankshaft is subjected to bending torsion load. In the compressor of the refrigerator, an eccentric shaft is connected with a connecting rod, a main shaft takes a crank case as a bracket, the tail end of the main shaft is connected with a motor rotor, the motor rotor drives the crank shaft to rotate, and the eccentric shaft drives the connecting rod and a piston to reciprocate.
The crankshaft structure of the refrigerator compressor is complex, many working procedures are positioned by blank surfaces, positioning references are inconsistent, and the eccentricity and symmetry are difficult to ensure. Most of the existing processing methods adopt gasket type clamps to correspondingly turn the eccentric shafts of crankshafts with various eccentric values. The crankshaft clamp structure is characterized in that the crankshaft clamp structure is placed in a larger shell, a certain redundant space is arranged in the eccentric adjustment direction, and gaskets of different types are added in the redundant space below the clamp structure when crankshafts with different eccentric amounts are processed, so that the eccentric amount of the crankshaft clamp structure is adjusted. In the adjusting process, as the crankshaft clamp structure is positioned in the shell, one end of the shell needs to be opened firstly, the crankshaft clamp structure is adjusted to a proper position, a gasket is added, and then the shell is closed, so that the crankshaft can be machined. In the process, the crankshaft is fixed by the crankshaft clamp structure, the eccentric amount of the crankshaft is unchanged, and then the crankshaft enters a machine tool for processing.
According to the clamp structure, the gasket type clamp is adopted, and each product with different eccentric amounts is required to be manufactured with a batch of corresponding gaskets, so that the cost of the clamp is greatly increased. The more eccentric models of the machined crankshaft are, the more gaskets are needed, and various gaskets are very complicated to manage, so that a large amount of manpower and material resources are consumed. In addition, the adjusting mode needs to open the clamp shell every time the eccentric amount of the crankshaft is changed, the gasket can be added after the clamp structure is adjusted to a proper position, the processing mode is very complicated, series of operations such as adding the gasket and closing the shell are needed after the eccentric amount of the crankshaft is determined, whether the final eccentric amount of the crankshaft has errors or not cannot be determined, and therefore the probability of defective products in the processing process is higher. In this kind of anchor clamps structure, prepare the gasket to the bent axle of every model respectively, still can bring a problem be that the spare parts quantity of gasket increases, have a large amount of gaskets to need sort the management, not only need pay a large amount of manpower and materials costs, also be a very big wasting of resources.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a fixture for turning a crankshaft eccentric shaft, which aims at the condition that different eccentric amounts of a crankshaft in the prior art need to be respectively customized with gasket types, and can realize the adjustment of the eccentric amount of the crankshaft without the replacement of the gaskets by adopting a mode of matching a fixed assembly and a movable assembly through an optimized structural design.
In order to achieve the above object, according to one aspect of the present invention, there is provided a fixture for turning a crankshaft eccentric shaft for clamping the crankshaft eccentric shaft to be machined, characterized in that the fixture comprises a base, wherein,
An oblong groove is formed in one side surface of the base along the eccentric adjustment direction, a pulling plate used for being connected with the power driving mechanism is arranged in the oblong groove, and the pulling plate can move back and forth in the oblong groove along the eccentric adjustment direction;
The clamping device comprises a base, and is characterized in that a positioning block is arranged on the other side surface of the base, an inner cone sleeve with an axial center through hole is clamped on the positioning block, an outer cone sleeve with an axial center through hole is coaxially sleeved on the end surface of one end of the inner cone sleeve opposite to the positioning block, a clamping head for clamping a crankshaft eccentric shaft is coaxially accommodated in a cavity formed by the center through holes of the inner cone sleeve and the outer cone sleeve, wherein one end, close to the outer cone sleeve, of the center through hole of the inner cone sleeve is a conical hole with a large outer diameter and a small inner diameter, namely the aperture of the center through hole deviating from one end of the positioning block is sequentially reduced from the end surface inwards, and the periphery of the end part of a clamping end, which is positioned in the center through hole of the inner cone sleeve, is a conical end surface matched with the conical hole;
The bottom of the base oblong groove is provided with a through hole which penetrates through two side surfaces, the through hole is a slotted hole which is consistent with the length direction and the eccentric adjustment direction, the pull plate, the inner taper sleeve and the outer taper sleeve are provided with through holes at corresponding positions, and the fixed shaft sequentially penetrates through the outer taper sleeve, the through hole on the inner taper sleeve, the slotted hole on the base and the through hole on the pull plate, so that the outer taper sleeve, the inner taper sleeve and the pull plate are fixedly connected into an integral structure, the integral structure can drive the inner taper sleeve to move relative to the outer taper sleeve when the pull plate is driven to axially act, so that the chuck is driven to move towards the inner taper sleeve, so that two conical surfaces relatively move to clamp or relax a workpiece, and the integral structure can move in the oblong groove and the slotted hole under the action of another driving force to realize eccentric adjustment.
As one preferable choice of the technical scheme of the invention, a T-shaped groove is formed in the pulling plate along the eccentric adjustment direction, a pull rod pushing head connected with a power mechanism is arranged in the T-shaped groove, the T-shaped head of the push rod pushing head is matched with the T-shaped groove, and the power drives the push rod pushing head to further drive the pulling plate to move eccentrically.
As one preferable mode of the technical scheme of the invention, the fixed shaft is sleeved with the bushing, one end of the bushing is abutted with the outer cone sleeve, and the other end of the bushing is abutted with the pulling plate, so that the distance between the outer cone sleeve and the pulling plate is fixed in axial or eccentric movement.
As one preferable mode of the technical scheme of the invention, the outer peripheral surface of the tail end part of the chuck, which is positioned in the central through hole of the outer taper sleeve, is conical, the matched part of the central through hole of the corresponding outer taper sleeve is conical, and the two matched parts can enable the outer taper sleeve to drive the chuck to move towards the inner taper sleeve through the conical matching.
As one preferable mode of the technical scheme of the invention, at least two oblong holes penetrating through two side surfaces are formed in the base, and a plurality of oblong holes are correspondingly formed among the corresponding pulling plate, the inner taper sleeve and the outer taper sleeve.
As one preferable choice of the technical scheme of the invention, the side surface of the base provided with the oblong groove is provided with the flange plate, the flange plate and the base are connected in a positioning way through the spigot, and the clamp is connected and fixed with the main shaft of the machine tool through the flange plate.
As one preferable choice of the technical scheme of the invention, the clamp is also provided with a shell, and the outer circle of the inner taper sleeve and the outer taper sleeve are matched with the inner hole of the shell, so that the inner taper sleeve and the outer taper sleeve can slide in the shell in a reciprocating manner; the shell is further provided with a second oblong hole which is connected with the base through the second oblong hole, so that the shell can reciprocate along the eccentric adjustment direction, and the axial movable unit is driven to reciprocate along the eccentric adjustment direction, so that the adjustment of the eccentric amount is realized.
As one preferable mode of the technical scheme of the invention, the base is provided with a supporting plate and an eccentric adjusting screw, the supporting plate is connected with the eccentric adjusting screw through a threaded through hole, and the eccentric adjusting screw passes through the threaded through hole to be abutted with the shell to be used as an eccentric adjusting component of the clamp.
As a preferred embodiment of the invention, the housing is further provided with an end cap, which is preferably fastened to the housing by means of a cylindrical pin.
As one preferable mode of the technical scheme of the invention, the end cover is also provided with a positioning cylindrical pin for realizing the pre-positioning during the installation of the crankshaft and preventing the reverse installation of the eccentric direction of the crankshaft.
As one preferable mode of the technical scheme of the invention, the clamp further comprises a balancing weight and a balancing weight adjusting screw, wherein the balancing weight and the balancing weight adjusting screw are arranged on the shell and used as a balancing weight adjusting component of the clamp, and the position of the balancing weight adjusting screw can be adjusted according to the eccentric amount, so that the weight balance of the clamp is ensured.
In the structure, the pulling plate, the inner cone sleeve and the outer cone sleeve are connected together through the fixed shaft penetrating through the oblong hole on the base, so that the axial movable unit of the technical scheme of the invention is formed. Because the pulling plate is positioned in the long groove on the base, the pulling plate can move along the eccentric adjustment direction, and meanwhile, the long round hole on the base also moves along the eccentric adjustment direction, so that the axial movable unit can reciprocate along the eccentric adjustment direction, and the adjustment of the eccentric amount is realized in a certain range. When the axial movable unit moves in the eccentric adjustment direction, the pulling plate slides in the oblong groove of the base, meanwhile, the position of the fixed shaft in the oblong hole of the base also changes, the outer taper sleeve and the inner taper sleeve move together, and the elastic clamping head arranged between the outer taper sleeve and the inner taper sleeve also changes in position, so that the eccentric amount of the clamp is finally adjusted according to the eccentric amount of the crankshaft clamped by the elastic clamping head. In the technical scheme of the invention, the fixed shafts for fixing the pull plate, the inner taper sleeve and the outer taper sleeve are preferably hexagon socket head screws. The axial movable unit is directly connected with the rotary oil cylinder through the pull rod and the pull rod push head and is directly subjected to the push-pull action of the pull rod. In order to change the distance between the inner taper sleeve and the outer taper sleeve in the push-pull process and ensure effective connection of the axial movable unit, the technical scheme of the invention is that a bushing is further arranged between the outer taper sleeve and the pulling plate. The bushing is sleeved on the fixed shaft, and two ends of the bushing are respectively abutted with the outer taper sleeve and the pulling plate, so that the distance between the outer taper sleeve and the pulling plate is relatively fixed. The inner taper sleeve and the base are positioned between the pulling plate and the outer taper sleeve, and the distance between the inner taper sleeve and the outer taper sleeve is relatively variable. Under the push-pull action of the pull rod, when the distance between the inner cone sleeve and the outer cone sleeve is relatively increased, the elastic chuck is loosened; when the distance between the inner taper sleeve and the outer taper sleeve is relatively reduced, the elastic chuck is clamped, so that the clamp can be adjusted to clamp the crankshaft to an optimal state.
In the technical scheme of the invention, the pull plate, the inner taper sleeve and the outer taper sleeve are connected through the fixed shaft to form an axial movable unit, the pull plate is connected with the driving device through the pull rod push head, the axial movable unit is only axially moved by the pull rod, when the eccentric amount is adjusted, the position of the shell is directly changed, the axial movable unit is wholly contained in the inner cavity of the clamp, and when the shell is adjusted along the eccentric direction, the axial movable unit is driven to move together in the eccentric adjustment direction.
According to the technical scheme, the base is provided with the supporting plate and the eccentric adjusting screw, the supporting plate is connected with the eccentric adjusting screw through the threaded through hole, and the eccentric adjusting screw passes through the threaded through hole to be abutted with the shell to be used as an eccentric adjusting assembly of the clamp; the eccentric adjusting components are preferably arranged in two groups, and are preferably arranged in the eccentric adjusting direction of the clamp relatively so as to ensure the balance of the shell. An end cap is preferably provided on the housing, which end cap is preferably fastened to the housing by means of a cylindrical pin. Further, a positioning cylindrical pin is preferably arranged on the end cover, and is used for realizing the pre-positioning during the installation of the crankshaft and preventing the reverse installation of the eccentric direction of the crankshaft.
In order to realize the balance of the whole balance weight of the clamp, the clamp further comprises a balance weight and a balance weight adjusting screw, wherein the balance weight and the balance weight adjusting screw are arranged on the shell and used as a balance weight adjusting component of the clamp, and the position of the balance weight adjusting screw can be adjusted according to the eccentric amount, so that the balance weight of the clamp is ensured; the weight adjusting components are preferably arranged in two groups, and are preferably arranged in the eccentric adjusting direction of the shell relatively.
In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:
1) According to the eccentric shaft tooling for the crankshaft, the operation is simple and convenient, the shell and the movable assembly can move along the eccentric adjustment direction of the clamp by rotating the adjusting screw, and the eccentric amount of the clamp is changed, so that the crankshafts with different eccentric amounts can be further processed; the quick switching of products with different eccentric sizes is realized, accessories are not required to be replaced, the processing cost of large gaskets with different thicknesses is saved compared with a gasket type clamp, and meanwhile, the related management cost is also saved.
2) According to the eccentric shaft clamp for the crankshaft, the circular truncated cone-shaped through holes of the inner cone sleeve and the outer cone sleeve are opposite to each other to form a cavity with small two ends and large middle, the elastic clamp is positioned in the cavity, and the compression and the relaxation of the elastic clamp can be realized by changing the distance between the inner cone sleeve and the outer cone sleeve; the structure is located in the shell, the whole structure is relatively closed, and in the clamping processing process, only the long shaft of the crankshaft is needed to be plugged into the elastic chuck, so that the safety is high.
3) According to the fixture for turning the eccentric shaft of the crankshaft, disclosed by the technical scheme of the invention, the positions of the shell and the internal device of the shell can be directly adjusted according to requirements by adjusting the adjusting screw, so that the eccentric amount of the crankshaft can be quickly adjusted and determined, the eccentric amount adjusting precision of the crankshaft of the fixture is improved, and the probability of defective products in the processing process is reduced.
Drawings
FIG. 1 is a schematic axial full section of an embodiment of a turning crankshaft eccentric clamp in accordance with the teachings of the present invention;
FIG. 2 is a schematic axial semi-sectional view of an embodiment of a turning crankshaft eccentric clamp according to the present disclosure;
FIG. 3 is a schematic plan view of the tie plate, base and housing connection surfaces of an embodiment of the eccentric clamp for turning crankshafts in accordance with the teachings of the present invention.
In the drawings, like reference numerals designate like structures and elements throughout the several views, wherein: the novel steel wire rope fixing device comprises a 1-pull rod push head, a 2-pull plate, a 3-support plate, a 4-bushing, a 5-flange, a 6-base, a 7-inner taper sleeve, an 8-outer taper sleeve, a 9-elastic chuck, a 10-shell, an 11-end cover, a 12-balancing weight, a 13-balancing weight adjusting screw, a 14-cylindrical pin, a 15-cylindrical pin, a 16-positioning block and a 17-fixed shaft.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
FIG. 1 is a schematic axial full section of one embodiment of a turning crankshaft eccentric clamp of the present invention. As shown in fig. 1, the eccentric shaft fixture includes a flange 5, a base 6, and a housing 10. The flange 5 and the main shaft of the numerically-controlled machine tool are preferably positioned by taking the outer circle of the main shaft of the numerically-controlled machine tool as a spigot as a transitional connection structure between the main shaft of the numerically-controlled machine tool and the clamp, and are preferably connected by adopting inner hexagon screws, and more preferably are connected by adopting 6 high-strength inner hexagon screws. The base 6 is matched with the flange 5 in size and provided with a plurality of through holes for being connected with other structures. In a preferred embodiment, the base 6 is connected with the flange 5 by positioning the spigot of the flange 5, and the shell 10 is connected with the base 6 by bolts. That is, the main shaft, the flange 5, the base 6 and the housing 10 of the numerically-controlled machine tool are sequentially connected to form the outer body of the eccentric shaft fixture in the technical scheme of the invention. Wherein, the shell 10 is provided with a slotted hole, a fixing screw penetrates through the slotted hole on the shell 10 to be connected with the base 6, and the relative position of the shell 10 and the base 6 can be adjusted by adjusting the position of the fixing screw in the slotted hole.
Further, a rotary oil cylinder is arranged at the tail part of the main shaft of the numerical control machine tool, the main shaft is hollow in the axial direction, and the rotary oil cylinder is connected with the internal structure of the crankshaft clamp through a pull rod penetrating through the axial direction of the main shaft. Specifically, the pull rod is connected with a pull rod pushing head 1 in the clamp, and the pull rod pushing head 1 is of a T-shaped structure and is connected with a pull plate 2 provided with a corresponding T-shaped groove. An oblong groove is formed in one side, close to the flange plate 5, of the base 6, and the pull plate 2 is arranged in the oblong groove of the base 6; the oblong groove is provided along the eccentric adjustment direction, and the T-shaped groove on the pulling plate 2 is preferably arranged parallel to the oblong groove. Because the flange plate 5 is annular, the pull rod pushing head 1 can pass through the flange plate 5 to be matched with the pull plate 2, and the pull rod pushing head 1 forming a T-shaped groove connecting structure can move along the direction of the T-shaped groove so as to be used for adjusting the eccentricity of the clamp. After eccentric adjustment, the pull rod and the pull rod push head 1 are preferably coaxial with the main shaft of the numerical control machine tool, so that the normal action of the rotary oil cylinder during high-speed operation is ensured, the phenomenon of force holding can not occur, and a series of defects caused by the problem of dynamic balance during high-speed rotation can be reduced.
Further, in the fixture, one end of the positioning block 16 is abutted against the base 6, and the other end of the positioning block 16 is in positioning connection with the inner cone sleeve 7 through a positioning block spigot, so that the positioning block 16 can be locked into a circular groove on the end face of the inner cone sleeve 7; the other side of the inner taper sleeve 7 is provided with an outer taper sleeve 8, a plurality of mutually corresponding through holes are respectively formed in the circumferential direction on the outer taper sleeve 8, the inner taper sleeve 7, the base 6 and the pulling plate 2, and the fixed shaft sequentially penetrates through the outer taper sleeve 8, the bushing 4 and the pulling plate 2, so that the structures are connected. Wherein, the through hole on the base 6 is a slotted hole arranged along the eccentric adjustment direction, and the fixed shaft can be allowed to move along the slotted hole on the base 6 in a small range along the eccentric adjustment direction. The bushing 4 is of a tubular structure and is sleeved on the fixed shaft, the bushing 4 passes through corresponding through holes in the inner taper sleeve 7 and the base 6, one end of the bushing is abutted against the pull plate 2, the other end of the bushing is abutted against the outer taper sleeve 8 (the bushing does not pass through the through holes in the pull plate 2 and the outer taper sleeve), and the distance between the pull plate 2 and the outer taper sleeve 8 can be kept relatively unchanged.
Two circular truncated cone-shaped through holes with opposite directions are formed in the inner taper sleeve 7 and the outer taper sleeve 8, wherein the diameter of one side, close to the base, of the circular truncated cone-shaped through hole in the inner taper sleeve 7 is smaller, and the diameter of one side, close to the base, of the circular truncated cone-shaped through hole in the outer taper sleeve 8 is larger, so that a cavity with small two ends and large middle section is formed between the inner taper sleeve 7 and the outer taper sleeve 8; the elastic chuck is arranged in the cavity and plays a role in clamping the crankshaft. The fixed shaft 17 sequentially passes through the through holes on the outer taper sleeve 8, the inner taper sleeve 7, the base 6 and the pulling plate 2, so that the outer taper sleeve 8, the inner taper sleeve 7 and the pulling plate 2 are fixed together to form a movable assembly of the clamp.
Through the structure, when the rotary oil cylinder pushes the pull rod pushing head 1 to move, the linkage of the pull plate 2, the bushing 4, the inner taper sleeve 7 and the outer taper sleeve 8 can be realized, so that the crankshaft clamped by the elastic chuck can be tightened or loosened. More specifically, the outer circles of the inner cone sleeve 7 and the outer cone sleeve 8 are matched with the inner holes of the shell 10, so that the inner cone sleeve 7 and the outer cone sleeve 8 can be just contained in the shell 10, and the whole movable assembly slides reciprocally in the shell.
Fig. 2 is an axial half-sectional structure schematic diagram of an embodiment of a turning crankshaft eccentric jig according to the technical scheme of the present invention. As shown in fig. 2, a support plate 3 and an eccentric adjusting screw are further provided on the outer side of the base 6 as an eccentric adjusting component of the jig in the embodiment of the present invention. Wherein, the bearing plate 3 is fixed on the base, and eccentric adjustment screw carries out threaded connection with the bearing plate 3, and wherein eccentric adjustment screw is arranged along anchor clamps axial, and one end is in butt with casing 10. In the whole clamp, the base is relatively fixed, and the eccentric amount is adjusted by rotating the eccentric adjusting screw, so that the shell and the movable assembly inside the clamp can move along the eccentric adjusting direction, and the eccentric amount of the clamp is adjusted. In the embodiment of the technical scheme of the invention, two groups of eccentric adjusting assemblies are preferably arranged on the base along the eccentric adjusting direction, and the two eccentric adjusting screws are oppositely arranged along the eccentric adjusting direction and are abutted with the shell 10.
FIG. 3 is a schematic plan view of the tie plate, base and housing connection surfaces of an embodiment of the eccentric clamp for turning crankshafts in accordance with the teachings of the present invention. As shown in fig. 3, a weight 12 and a weight adjusting screw 13 are provided on the housing 10; after the position of the housing 10 is adjusted according to the magnitude of the eccentric amount, the weight adjusting screw 13 is required to be correspondingly adjusted to ensure the weight balance of the whole clamp, thereby ensuring the dynamic balance of the whole clamp during high-speed rotation.
As shown in fig. 1, the casing 10 is further provided with an end cover 11, the end cover 11 is relatively fixed on the casing 10 by a cylindrical pin 15, and the end cover 11 is provided with a cylindrical pin 14 for pre-positioning during clamping the crankshaft, namely, quick positioning, and meanwhile, the cylindrical pin is used as a foolproof device so as to prevent the eccentric direction of the crankshaft from being reversely assembled and the machine is collided during processing.
In a specific clamping process, the positioning step direction of the positioning block 16 is consistent with the eccentric adjustment direction, and a straight table at the upper end of the positioning block 16 is used for being matched with a crankshaft main shaft positioning groove so as to circumferentially position a crankshaft; the upper surface of the end cover is contacted with the crankshaft bearing surface for axial positioning of the crankshaft. When products with different eccentric amounts are required to be processed, the firm screws between the shell 10 and the base 6 are loosened slightly, the bolts on the supporting plate 3 and the counterweight adjusting screws 13 are adjusted, and after adjustment, the firm screws between the shell 10 and the base 6 are locked, so that the device is suitable for popularization and use in adjustment.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (7)
1. A fixture for turning a crankshaft eccentric shaft is used for clamping the crankshaft eccentric shaft to be processed and is characterized by comprising a base, wherein,
An oblong groove is formed in one side surface of the base along the eccentric adjustment direction, a pulling plate used for being connected with the power driving mechanism is arranged in the oblong groove, and the pulling plate can move back and forth in the oblong groove along the eccentric adjustment direction;
The clamping device comprises a base, and is characterized in that a positioning block is arranged on the other side surface of the base, an inner cone sleeve with an axial center through hole is clamped on the positioning block, an outer cone sleeve with an axial center through hole is coaxially sleeved on the end surface of one end of the inner cone sleeve opposite to the positioning block, a clamping head for clamping a crankshaft eccentric shaft is coaxially accommodated in a cavity formed by the center through holes of the inner cone sleeve and the outer cone sleeve, wherein one end, close to the outer cone sleeve, of the center through hole of the inner cone sleeve is a conical hole with a large outer diameter and a small inner diameter, namely the aperture of the center through hole deviating from one end of the positioning block is sequentially reduced from the end surface inwards, and the periphery of the end part of a clamping end, which is positioned in the center through hole of the inner cone sleeve, is a conical end surface matched with the conical hole;
The bottom of the base oblong groove is provided with a through hole penetrating through two side surfaces, the through hole is a slotted hole consistent with the length direction and the eccentric adjustment direction, the pull plate, the inner taper sleeve and the outer taper sleeve are provided with through holes at corresponding positions, and the fixed shaft sequentially penetrates through the outer taper sleeve, the through hole on the inner taper sleeve, the slotted hole on the base and the through hole on the pull plate, so that the outer taper sleeve, the inner taper sleeve and the pull plate are connected and fixed into an integral structure, the integral structure can drive the inner taper sleeve to move relative to the outer taper sleeve when the pull plate is driven to axially act, so that the chuck is driven to move towards the inner taper sleeve to enable the two conical surfaces to relatively move so as to clamp or relax a workpiece, and the integral structure can move in the oblong groove and the slotted hole under the action of another driving force so as to realize eccentric adjustment;
The fixture is characterized in that the fixture is also provided with a shell, the shell is used for being covered on the other side surface of the base, so that the outer taper sleeve, the inner taper sleeve and the clamping head are covered to form an integral structure, long round holes in the length direction along the eccentric adjustment direction are formed in the corresponding positions of the base and the shell, and the integral structure moves in the eccentric direction after the shell and the base are fixed through a fixing piece so as to drive the shell to follow up;
The base is provided with a supporting plate and an eccentric adjusting screw, the supporting plate is connected with the eccentric adjusting screw through a threaded through hole, and the eccentric adjusting screw passes through the threaded through hole to be abutted with the shell to be used as an eccentric adjusting assembly of the clamp;
the fixed shaft is sleeved with the bushing, one end of the bushing is abutted with the outer cone sleeve, and the other end of the bushing is abutted with the pulling plate, so that the distance between the outer cone sleeve and the pulling plate is fixed in axial or eccentric movement.
2. The fixture for turning crankshaft eccentric shaft according to claim 1, wherein the pull plate is provided with a T-shaped groove along the eccentric adjustment direction, wherein a pull rod pushing head connected with the power mechanism is arranged, the T-shaped head of the pull rod pushing head is matched with the T-shaped groove, and the pull rod pushing head is driven by power to drive the pull plate to move eccentrically.
3. The fixture for turning a crankshaft eccentric shaft according to claim 1, wherein the outer peripheral surface of the end part of the clamping head in the central through hole of the outer taper sleeve is conical, and the matched part of the central through hole of the corresponding outer taper sleeve is conical, so that the clamping head is driven to move towards the inner taper sleeve by the conical matching of the clamping head and the outer taper sleeve.
4. The fixture for turning a crankshaft and eccentric shafts according to claim 1, wherein the base is provided with at least two oblong holes penetrating through two side surfaces, and a plurality of oblong holes are correspondingly arranged among the corresponding pulling plate, the inner taper sleeve and the outer taper sleeve.
5. The turning crankshaft eccentric shaft clamp according to any one of claims 1-4, wherein a flange is arranged on the side surface of the base, which is provided with the oblong groove, and the flange and the base are connected through a spigot in a positioning way, and the clamp is fixedly connected with a main shaft of a machine tool through the flange.
6. The turning crankshaft eccentric shaft clamp according to claim 5, wherein an end cover is further arranged on the shell, and the end cover is fixed on the shell through a cylindrical pin.
7. The vehicle crankshaft eccentric shaft clamp according to any one of claims 1 to 4 and 6, wherein the clamp further comprises a balancing weight and a balancing weight adjusting screw, which are mounted on the housing as a balancing weight adjusting component of the clamp, the position of the balancing weight adjusting screw being adjustable according to the magnitude of the eccentric amount, thereby ensuring weight balance of the clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710835171.XA CN107584305B (en) | 2017-09-15 | 2017-09-15 | Clamp for turning crankshaft eccentric shaft |
Applications Claiming Priority (1)
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| CN201710835171.XA CN107584305B (en) | 2017-09-15 | 2017-09-15 | Clamp for turning crankshaft eccentric shaft |
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| CN107584305B true CN107584305B (en) | 2024-05-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110340706B (en) * | 2019-07-18 | 2023-11-17 | 西安航天精密机电研究所 | Eccentric shaft turning clamp device and machining method |
| CN111120529A (en) * | 2019-12-31 | 2020-05-08 | 博世华域转向系统有限公司 | Elastic coupling for testing servo motor |
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| CN201950501U (en) * | 2011-01-27 | 2011-08-31 | 临汾华翔纬泰精工机械有限公司 | Clamp for eccentric crankshaft of lathe |
| CN202021485U (en) * | 2011-04-29 | 2011-11-02 | 重庆美心米勒曲轴股份有限公司 | Fixture for processing eccentric shaft |
| CN102303258A (en) * | 2011-08-11 | 2012-01-04 | 天润曲轴股份有限公司 | Eccentric clamp of crank shaft |
| CN203304945U (en) * | 2013-06-12 | 2013-11-27 | 嘉兴市宏丰机械有限公司 | Clamp for machining eccentric shaft of crankshaft |
| CN204123170U (en) * | 2014-09-10 | 2015-01-28 | 芜湖市甬微制冷配件制造有限公司 | A kind of for the eccentric turning attachment of machining crankshafts |
| CN204413698U (en) * | 2015-01-12 | 2015-06-24 | 浙江汇润电气有限公司 | A kind of fixture |
| CN207309497U (en) * | 2017-09-15 | 2018-05-04 | 黄石华旦机械制造有限公司 | A kind of car crankshaft eccentric shaft fixture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1579917A (en) * | 1977-02-09 | 1980-11-26 | Ex Cell O Corp | Machine tool with a rotatable spindle and a tool holder |
| US6598884B1 (en) * | 1998-08-27 | 2003-07-29 | Anca Pty. Ltd. | Method and apparatus for adjusting a collet in a machine tool |
| CN2803613Y (en) * | 2004-10-29 | 2006-08-09 | 中原工学院 | Offset regulatable clamp |
| CN201950501U (en) * | 2011-01-27 | 2011-08-31 | 临汾华翔纬泰精工机械有限公司 | Clamp for eccentric crankshaft of lathe |
| CN202021485U (en) * | 2011-04-29 | 2011-11-02 | 重庆美心米勒曲轴股份有限公司 | Fixture for processing eccentric shaft |
| CN102303258A (en) * | 2011-08-11 | 2012-01-04 | 天润曲轴股份有限公司 | Eccentric clamp of crank shaft |
| CN203304945U (en) * | 2013-06-12 | 2013-11-27 | 嘉兴市宏丰机械有限公司 | Clamp for machining eccentric shaft of crankshaft |
| CN204123170U (en) * | 2014-09-10 | 2015-01-28 | 芜湖市甬微制冷配件制造有限公司 | A kind of for the eccentric turning attachment of machining crankshafts |
| CN204413698U (en) * | 2015-01-12 | 2015-06-24 | 浙江汇润电气有限公司 | A kind of fixture |
| CN207309497U (en) * | 2017-09-15 | 2018-05-04 | 黄石华旦机械制造有限公司 | A kind of car crankshaft eccentric shaft fixture |
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| CN107584305A (en) | 2018-01-16 |
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