CN211734510U

CN211734510U - Workpiece fixing device for electroplating outside cylinder body tank

Info

Publication number: CN211734510U
Application number: CN201922177969.7U
Authority: CN
Inventors: 聂进; 何军; 贺超; 文家勇
Original assignee: Loncin Motor Co Ltd
Current assignee: Loncin Motor Co Ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-10-23
Anticipated expiration: 2029-12-06

Abstract

The utility model discloses a workpiece fixing device for cylinder body outside-bath electroplating, which comprises a fixing frame and a pressing component; the fixing frame comprises a bottom plate and a frame fixed on the bottom plate; the pressing assembly is used for pressing the workpiece on the bottom plate and locking the workpiece; the utility model discloses installation mechanism is assisted in the cooperation can the utility model discloses go up the installation and assist the installation subassembly, make work piece fixed mounting in the utility model discloses back is transferred to each station of electroplating, it is fixed to form the modular, and convenient the change, and the cooperation is with installation complementary unit, applicable in different work pieces, and need not change the positive pole, therefore also need not stop the production line, is suitable for the work piece of various sizes, realizes "seamless switching" of product, avoids the productivity loss of stopping the line, satisfies the delivery demand rapidly, reduces the switching time of ripe product to minimum, falls to the productivity loss minimumly.

Description

Workpiece fixing device for electroplating outside cylinder body tank

Technical Field

The utility model relates to a cylinder body electroplating device component, in particular to a workpiece fixing device for cylinder body outside-bath electroplating.

Background

The cylinder body is used as a main part of equipment such as an engine, a plunger pump, a reciprocating compressor and the like and is used for forming a working space together with the piston and the cylinder head; taking an engine as an example, the engine forms a combustion chamber and provides a motion track for the piston assembly, so that a power conversion environment is formed. In the process of guiding the piston to continuously reciprocate, the inner wall of the cylinder and the piston rub against each other for a long time at a high frequency, so that the useful power of the cylinder is reduced, and a part of energy is consumed. In order to solve the problems, electroplating is carried out on the inner wall, and an electroplating coating is used for replacing the cylinder sleeve to solve the problems. In the prior art, the circulating electroplating outside the tank ensures that cations on a plating layer are replaced in real time due to the formation of a flowing electroplating environment, the concentration of the plating layer is not different, the fluidity of the plating layer is stable and uniform, the compactness of the plating layer is ensured, and the electroplating quality is ensured.

However, in the existing structure for plating outside the bath, because the cylinder bodies (workpieces) have different overall dimensions, the anodes (especially the heights) need to be replaced for normal operation of plating, the whole production line needs to be shut down, the loss is increased, and the production cost is increased; and frock clamp is also diverse, and the structure is complicated, and the change process needs the manual work to go on, reduces work efficiency.

Therefore, the existing tooling for circular electroplating needs to be improved, has universality, is suitable for workpieces of various sizes, realizes seamless switching of products, avoids capacity loss caused by line stop, quickly meets delivery requirements, reduces switching time of mature products to the minimum, and reduces capacity loss to the minimum.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a general type frock of engine cylinder body extra-tank electroplating, have the commonality, be suitable for the work piece of various sizes, realize the "seamless switching" of product, avoid the productivity loss of stopping the line, satisfy the delivery demand rapidly, reduce the switching time of ripe product to minimum, reduce the productivity loss to minimum.

The utility model discloses a workpiece fixing device for cylinder body outside-bath electroplating, which comprises a mounting rack assembly, wherein the mounting rack assembly comprises a fixing rack and a pressing assembly;

the fixing frame comprises a bottom plate and a frame fixed on the bottom plate;

the pressing assembly is used for pressing the workpiece on the bottom plate and locking the workpiece;

the utility model discloses during the use, cooperation installation auxiliary assembly uses, after having compensated height and diameter equidimension, the work piece is installed and is transferred to each station of electroplating behind the frock, form the cooperation through the installation auxiliary assembly adjustment overall height that matches with the work piece and positive pole, different work pieces need not change the positive pole, therefore also need not stop the production line, change different work pieces and directly install in this frock and lay in electroplating device can, supporting installation auxiliary assembly can also form the transition between work piece and electroplating device, compensate the difference between the different internal diameters and the bottom plate of different work pieces, form in height and the commonality in the diameter;

the installation auxiliary assembly can adopt a cylindrical structure, is matched with the workpiece in height, so that the total height is matched with the height of the anode, and the inner diameter of the cylindrical structure is variable, so that the installation auxiliary assembly is suitable for transitional installation between the bottom plate and the workpiece and is not repeated herein; of course, the structure of the installation auxiliary assembly is not necessarily cylindrical, and can be any shape for achieving the above purpose, and the description is omitted;

the pressing assembly is arranged on the fixing frame and used for pressing the workpiece and the installation auxiliary assembly, so that the stability of the workpiece in the transportation process and the electroplating process is guaranteed, and the smoothness of the electric degree quality and the electroplating process is guaranteed.

Furthermore, the frame is provided with a fixed upper longitudinal beam, the pressing assembly is arranged on the upper longitudinal beam, and a pressing part which can be driven to reciprocate up and down is arranged on the pressing assembly and is used for pressing or releasing the workpiece; the structure can adopt any existing mechanical structure, including manual or electric, and can be realized by adopting the existing mechanical structure, which is not described again; as shown in the figure, the frame includes four upright posts detachably fixed on the bottom plate (by bolts), two upright posts are respectively disposed on two longitudinal sides (according to the arrangement direction of the plurality of workpieces), an upper cross beam is fixedly connected between the upper portions of the two upright posts (by bolts), and the upper longitudinal beam is fixedly connected between the two upper cross beams to form a stable structure of fixed connection, which is not described herein again.

Furthermore, the pressing assembly comprises a pressing rod capable of being driven to reciprocate up and down along the upper longitudinal beam and a lever assembly for driving the pressing rod to reciprocate, and the pressing part is positioned at the lower end of the pressing rod; the lever assembly comprises a driving lever and a rocker arm, the resistance end of the lever is rotatably hinged to the upper end of the pressing rod, the lower end of the rocker arm can rotate in a single degree of freedom relative to the upper longitudinal beam, and the upper end of the rocker arm is coaxially hinged to the fulcrum of the driving lever in a single degree of freedom; the rocker arm is provided with a limiting block, and the limiting block limits the lever to continue rotating towards the pressing direction when the lever is driven to drive the pressing rod to press the workpiece, so that locking is realized;

the reciprocating motion of the pressing rod is generally single degree of freedom, namely only reciprocating motion is carried out, the pressing part can be integrally formed with the pressing rod or can be detachably arranged in a split manner, the pressing part is a pressing plate with a plate-shaped structure, and is generally movably connected with the end part of the pressing rod with a certain degree of freedom, such as a movable head of a ball hinge and the like, so that the pressing end face can be adapted to, and the coaxiality of workpieces can be ensured;

the upper end of the rocker arm is hinged with the fulcrum of the driving lever through the fulcrum hinged shaft, the driving lever rotates around the fulcrum under the action of external force to ensure that the resistance arm approaches to be vertical from the transverse direction, thereby driving the pressing rod to descend to press the workpiece, the rocker arm swings forwards around the lower end of the rocker arm under the restraint of the transverse direction (no displacement) of the pressing rod, the fulcrum axis intersects at least the fulcrum hinge axis or passes rearwardly beyond the hinge axis as the resistance arm compresses the workpiece, from this formation auto-lock avoids the lever to revolve under the reaction force, and simultaneously, the stopper restriction lever continues to rotate to compressing tightly the direction, thereby avoids continuing to rotate the drive compressing rod and goes upward, forms and compresses tightly the auto-lock (compress tightly the mechanical structure that pole and drive lever constitute promptly and be similar to connecting rod crank structure, nevertheless owing to carry on spacingly by the stopper, avoid forming and be similar to connecting rod crank's circular motion to form the auto-lock).

The pressing assembly further comprises a base, the base is fixed on the upper longitudinal beam, the pressing rod can reciprocate up and down in a single degree of freedom and is arranged on the base, the two rocker arms are respectively arranged on two sides of the base, and the lower ends of the two rocker arms are coaxially hinged to the base; when the pressing rod presses a workpiece through the pressing part, the axis of the pressing rod is intersected with or exceeds the axis of the fulcrum backwards, and at the moment, the limiting block props against the resistance arm of the driving lever from the back side;

furthermore, the base is detachably and fixedly connected to the upper longitudinal beam, the driving lever is of a right-angle structure taking a fulcrum as a boundary, the resistance arm forms a fork-shaped groove, the pressing rod is located in the fork-shaped groove and hinged to the end portion of the resistance arm, and the fork-shaped structure is beneficial to stable connection and does not apply deflection force, so that the structure is stable and the service life is long; as shown in the figure, the driving lever is of a right-angle structure taking a fulcrum as a boundary, namely, the power arm is bent forwards at the fulcrum, so that the operation is convenient and the interference with the rocker arm (a limiting block) is avoided;

the utility model provides a backward indicate the drive lever power arm wobbling direction when compressing tightly the work piece, the dorsal part then with backward corresponding one side, no longer give consideration to here.

Due to the action of the limiting block, the resistance wall of the lever is prevented from continuously rotating, the rocker arm cannot continuously rotate under the action of the limiting block, namely, interlocking is formed, and the axis of the pressing rod is intersected with or backwards exceeds the axis of the fulcrum (generally, the axis is intersected), namely, a stable retraction mechanism is formed, and loosening is avoided.

Furthermore, the base comprises a base plate and a guide sleeve, and a through hole for the compression rod to pass through is formed in the upper longitudinal beam; the guide sleeve is provided with a guide slideway and is fixed on the base plate, the guide slideway is vertically arranged right opposite to the through hole on the upper longitudinal beam, and the pressing rod penetrates through the guide slideway and is matched with the guide slideway in a way of reciprocating up and down; the base plate is detachably and fixedly connected with the upper longitudinal beam; the lower ends of the two rocker arms are symmetrically hinged to the two sides of the guide sleeve respectively; the base plate is detachably connected with the upper longitudinal beam through a connecting hole (a bolt penetrates through the connecting hole and a waist-shaped hole is generally adopted), so that the base plate has strong adaptability; the guide sleeve is fixed on the base plate through threaded connection, and the structure is simple; as shown in the figure, the lower end of the guide sleeve is provided with an external thread which is screwed on the internal thread on the base plate to form connection, and in order to avoid falling off, the lower end of the guide sleeve is also locked by a locking nut; the lower end of the rocker arm is hinged on the guide sleeve, the structure is simple and practical, the whole locking assembly forms a module, and the hinged part is installed on the base plate after being completely processed;

further, the bottom plate is provided with a positioning hole for positioning the bottom plate on the electroplating device and a functional hole for installing a workpiece, and the functional hole can be a bottom plate channel for installing a component for supporting the workpiece, which is not described herein again.

The utility model has the advantages that: the utility model discloses a work piece fixing device for cylinder body external bath electroplates for work piece fixed mounting is in the utility model discloses later transferred to each station of electroplating, it is fixed to form the modular, and convenient the change cooperates with the installation complementary unit, has stronger adaptability, and different work pieces need not change the positive pole, therefore need not stop the production line either; the utility model is used for cylinder body external bath electroplates and has modularization and commonality, is suitable for the work piece of various sizes, realizes "seamless switching" of product, avoids stopping the productivity loss of line, satisfies the delivery demand rapidly, reduces the switching time of ripe product to minimum, falls to the productivity loss minimum.

Drawings

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

FIG. 1 is a perspective view of the present invention (mounted on the device);

FIG. 2 is an enlarged view of FIG. 1A;

FIG. 3 is a sectional view of the structure of the present invention;

fig. 4 is an enlarged view of fig. 3B.

Detailed Description

Fig. 1 is the utility model discloses a perspective view (install on the device), fig. 2 is the enlarger of fig. 1A department, fig. 3 is the structure section view of the utility model, fig. 4 is the enlarger of fig. 3B department, as shown in the figure: the utility model is described in the using state, and the workpiece fixing device for electroplating outside the cylinder body groove of the embodiment comprises a fixing frame and a pressing component 1;

the fixed frame comprises a bottom plate 2 and a frame fixed on the bottom plate;

when the utility model is used, the installation auxiliary component is matched to be used for installing a workpiece, compensating the workpiece in height and diameter, installing the workpiece on the bottom plate and compressing the workpiece by the compressing component 1, and the installation auxiliary component is also used for guiding electroplating solution into the cylinder body and passing through the anode; the workpiece is arranged on the tool and then transferred to each station of electroplating, the overall height is adjusted to be matched with the anode through the installation auxiliary assembly matched with the workpiece, and different workpieces 9 do not need to be changed into the anode, so that the production line does not need to be stopped, different workpieces are changed and directly arranged on the tool and are arranged on the electroplating device, the matched installation auxiliary assembly can also form transition between the workpieces and the electroplating device, the installation difference between different inner diameters and bottom plates of different workpieces is compensated, and the universality on the height and the diameter is formed;

the installation auxiliary assembly can adopt a cylindrical structure, is matched with the workpiece 9 in height, so that the total height is matched with the height of the anode, and the inner diameter of the cylindrical structure is variable, so that the installation auxiliary assembly is suitable for transition between the bottom plate and the inner diameter of the workpiece, and is not repeated herein; of course, the structure of the installation auxiliary assembly is not necessarily cylindrical, and can be any shape for achieving the above purpose, and the description is omitted;

When the utility model is used, the installation auxiliary assembly comprises a reducing compensation part 3, the reducing compensation part 3 is a cylinder with an axial through hole and can be positioned and installed on the bottom plate and insulate the bottom plate from the electroplating environment, and the axial through hole is communicated with the inner hole of the workpiece for leading in electroplating solution through the anode; the lower ends of the different reducing compensation parts 3 have the same external dimension, the upper ends have the internal diameter dimension which is matched with the internal diameter of the corresponding workpiece, the total height of the reducing compensation parts after the workpieces are installed can be matched with an anode to finish electroplating, and when the reducing compensation parts are used, the workpieces are axially pressed on the reducing compensation parts by the pressing assembly;

the bottom plate is provided with a positioning hole for positioning and placing the bottom plate on the electroplating device and a functional hole for installing a workpiece, and the functional hole can be a bottom plate channel for installing a part for supporting the workpiece; the workpieces (air cylinders) with different heights and diameters are provided with variable-diameter compensation pieces with different heights, so that the total height of the workpieces arranged in the invention is not changed, and the workpieces can be matched with the height of the anode; as shown in the figure, the fixed diameter size of the lower ends of different reducing compensation pieces (different reducing compensation pieces matched with different workpieces) can be matched and installed with a standard tool, the upper ends of the different reducing compensation pieces correspond to the inner diameters of the corresponding workpieces (concentric with the same diameter), the lower ends of the different reducing compensation pieces are used for penetrating through a bottom plate channel (function hole) of a bottom plate to be matched (the bottom plate is isolated from an electroplating environment), the upper portions of the different reducing compensation pieces are matched with the workpieces (the matching sizes of the different workpieces are different), and the total height of the reducing compensation pieces after the workpieces are installed enables the total height to be matched with the height of an anode to; the reducing compensation part 3 is made of glass fiber reinforced plastic (certainly, other non-conductive materials with certain strength can be adopted, and the description is omitted), so that the reducing compensation part has an insulation effect and improves the electroplating efficiency.

In this embodiment, the installation auxiliary assembly further comprises a shielding member, the shielding member comprises an upper shielding ring 7 and a lower shielding ring 10 which are made of a non-metal conductive material, the lower shielding ring 10 is coaxially embedded into the axial through hole of the reducing compensation member 3 and axially abuts against the lower end of the workpiece 9 in the same diameter, and the upper shielding ring 7 abuts against the upper end of the workpiece 9 in the same diameter and is axially compressed by the compression assembly 1; the reducing compensation part is made of non-conductive materials, so that a stable electroplating working condition is formed on a conductive part, and the waste of materials and the interference to the electroplating working condition are avoided; the same-diameter mutual abutting means that the inner diameter of the upper shielding ring 7 and the inner diameter of the lower shielding ring 10 are the same as and coaxial with the inner diameter of the workpiece 9, edge burrs generated in the electroplating process are led to the upper edge of the upper shielding ring and the lower edge of the lower shielding ring in the electroplating process so as to ensure the electroplating quality, and the upper shielding ring 7 and the lower shielding ring 10 are made of conductive materials, so that the description is omitted; of course, radial seals are required to be formed between the upper shielding ring 7 and the lower shielding ring 10 and the workpiece 9 (cylinder) to prevent the electroplating solution from leaking; the lower end face (contacted and abutted with the upper end face of the cylinder body) of the upper shielding ring 7 and the upper end face (contacted and abutted with the lower end face of the cylinder body) of the lower shielding ring 10 are respectively provided with a sealing ring 12 and a sealing ring 13 (an annular sealing ring groove can be arranged on the corresponding end face and is used for placing the sealing ring), the sealing ring is generally made of acid and alkali resistant fluororubber, and the purposes of sealing and contact abutment can be realized through external force compression deformation; the lower end of the inner circle of the upper shielding ring forms an annular chamfer, the upper end of the inner circle of the lower shielding ring forms an annular chamfer, and the chamfer structure can guide burrs to grow towards a sudden change position, so that the interference on electroplating of the cylinder body is avoided, and meanwhile, the structure is favorable for ensuring that the interference on the flow of electroplating solution is not generated; the upper shielding ring and the lower shielding ring are made of non-metal conductive materials (such as conductive rubber or plastics), when in actual use, the inner plating layer can be separated from the upper shielding ring and the lower shielding ring by using a small external force (because the binding force between the non-metal conductive materials and a metal plating layer is generally small), for example, the plating layer can be directly peeled off by using a sharp tool, or the upper shielding ring and the lower shielding ring can be deformed by using a small external force (such as hand holding) to peel off the plating layer, the non-metal conductive materials with the set elastic modulus can be deformed by using the non-metal conductive materials with the set elastic modulus, but can bear the pressing force of a workpiece during electroplating to ensure the smooth operation of the electroplating process, so that the plating layer and burrs of the inner circle of the shielding ring can be separated from the inner circle of the shielding ring, the shielding ring can be used for the second time, and, the consumption and the electroplating cost are reduced; and metallic shield ring (generally for aluminium) cladding material and burr and shielding ring combine closely, can't drop, adopt chemistry to remove the mode of cladding material and handle, need provide and remove the plating place to the shielding ring removes to plate many times the back can influence the later stage and use and scrap, and the cladding material also can't be retrieved and along with the waste liquid discharges, causes very big waste.

In the embodiment, the upper shielding ring and the lower shielding ring are both made of POM (polyoxymethylene) material and carbon powder, the addition proportion is less than or equal to 1% by mass, and about 0.4% is preferred, so that the conductive coating has good physical properties and chemical properties, good conductivity, easy shedding of the coating, long-term use without replacement and electroplating cost saving.

In this embodiment, the installation auxiliary assembly further includes a positioning sleeve 8, the positioning sleeve 8 is provided with a positioning pin 801 which is matched with an installation threaded hole on the workpiece 9, and is positioned by the positioning pin 801 so that the positioning sleeve is concentric with the workpiece, and the upper shielding ring 7 is concentrically arranged in the positioning sleeve 8 and is concentrically matched with the workpiece 9 in the same diameter by the positioning sleeve 8;

the mounting threaded hole on the workpiece 9 refers to a threaded hole on the end face of the workpiece, the positioning sleeve aims to ensure that the positioning sleeve 8 is concentric with the workpiece by utilizing the matching between the positioning pin and the mounting threaded hole (the positioning pin is inserted into the threaded hole to form positioning), and the upper shielding ring 7 is mounted on the inner circle of the positioning sleeve so as to form coaxial matching with the workpiece in the same diameter; the locating pin generally is two at least, and this embodiment is two that the symmetry set up promptly, guarantees positioning accuracy.

The specific installation process is as follows: the reducing compensation part 3 is positioned and placed on the bottom plate 2 (a sealing ring can be used, the sealing ring can be made of EVA foam), the lower shielding ring 10 is placed on the reducing compensation part 3, a sealing part (the sealing mode is not limited) can be arranged between the lower end and the reducing compensation part 3, the sealing ring is placed on the upper end face of the lower shielding ring 10 to set the position, a workpiece is placed on the lower shielding ring, the upper shielding ring is placed after the positioning of the positioning sleeve, and the pressing device is used for pressing the lower shielding ring.

In the embodiment, the frame is provided with a fixed upper longitudinal beam 6, the pressing component 1 is arranged on the upper longitudinal beam 6, and a pressing part 5 which can be driven to reciprocate up and down is arranged for pressing or releasing a workpiece 9; the structure can adopt any existing mechanical structure, including manual or electric, and can be realized by adopting the existing mechanical structure, which is not described again; as shown in the figure, the frame includes four upright posts 4 detachably fixed on the bottom plate 2 (by bolts), two upright posts 4 are respectively disposed on two longitudinal sides (according to the arrangement direction of the plurality of workpieces), an upper cross beam 12 is fixedly connected between the upper portions of the two upright posts 4 (by bolts), and the upper longitudinal beam 6 is fixedly connected between the two upper cross beams 12 to form a stable structure of fixed connection, which is not described herein again.

In this embodiment, the pressing assembly 1 includes a pressing rod 101 capable of being driven to reciprocate up and down along the upper longitudinal beam 6 and a lever assembly for driving the pressing rod 101 to reciprocate, and the pressing portion 5 is located at the lower end of the pressing rod 101; the lever assembly comprises a driving lever (comprising a power arm 1021 and a resistance arm 1022) and a rocker arm, wherein the resistance end (namely the end part of the resistance arm) of the lever is rotatably hinged at the upper end of the pressing rod 101, the lower end of the rocker arm can rotate in a single degree of freedom relative to the upper longitudinal beam, and the upper end of the rocker arm is coaxially hinged with the fulcrum of the driving lever in a single degree of freedom rotation; a limiting block 104 is arranged on the rocker arm, and the limiting block 104 limits the lever to continue rotating towards the pressing direction when the lever is driven to drive the pressing rod 101 to press the workpiece;

the reciprocating motion of the pressing rod 101 is generally single degree of freedom, that is, only reciprocating motion is performed, the pressing part 5 can be integrally formed with the pressing rod 101 or can be detachably arranged in a split manner, in the embodiment, the pressing part with a plate-shaped structure is adopted, and the pressing part is generally movably connected with the end part of the pressing rod with a certain degree of freedom, such as a movable head like a ball hinge, so that the pressing end face can be adapted to, and the coaxiality of workpieces can be ensured;

the upper end of the rocker arm is hinged with the fulcrum of the driving lever through the fulcrum hinged shaft 14, the driving lever rotates around the fulcrum under the action of external force to enable the resistance arm 1022 to approach to be vertical from the transverse direction, so that the pressing rod 101 is driven to press a workpiece downwards, the rocker arm swings forwards around the hinged point at the lower end of the rocker arm under the transverse (no displacement) constraint of the pressing rod 101, when the resistance arm 1022 presses the workpiece, the fulcrum axis is at least intersected with the fulcrum hinged axis (the axis of the hinged shaft 14) or exceeds the hinged axis backwards, so that self-locking is formed, the lever is prevented from rotating under the reaction force, meanwhile, the limiting block limits the lever to rotate continuously in the pressing direction, so that the pressing rod is prevented from rotating continuously to drive the pressing rod to move upwards, and pressing self-locking is formed (namely, the mechanical structure formed by the pressing rod and the driving lever is similar to, thereby forming a self-lock).

In this embodiment, the pressing assembly 1 further includes a base, the base is fixed to the upper longitudinal beam 6, the pressing rod 101 is disposed on the base in a manner of single-degree-of-freedom up-and-down reciprocating motion, the two rocker arms are respectively arranged on two sides of the base (the rocker arm 1031 and the rocker arm 1032), the lower ends of the two rocker arms are coaxially hinged to the base, and the upper ends of the two rocker arms are respectively coaxially hinged to two sides of a fulcrum of the driving lever (i.e., the two rocker arms rotate coaxially with the; when the pressing rod 101 presses a workpiece through the pressing part, the axis of the pressing rod is intersected with or exceeds the axis of the fulcrum backwards, and at the moment, the limiting block supports against the resistance arm of the driving lever from the back side;

as shown in the figure, the base is fixed on the surface of the upper longitudinal beam 6 through a detachable structure, and a through hole for the compression rod to pass through is formed in the upper longitudinal beam 6; the base comprises a base plate 105 and a guide sleeve 107, the guide sleeve is provided with a guide slideway, the guide slideway is vertically arranged right opposite to the through hole on the upper longitudinal beam, and the pressing rod penetrates through the guide slideway and is matched with the guide slideway in a way of reciprocating up and down; the base plate 105 is detachably connected with the upper longitudinal beam 6 through a connecting hole (a bolt passes through, and a waist-shaped hole is generally adopted), so that the base plate has strong adaptability; the guide sleeve 107 is fixed on the base plate 105 through threaded connection, and the structure is simple; as shown in the figure, the lower end of the guide sleeve 107 is provided with external threads, and is screwed on the internal threads on the base plate 105 in a manner that the axis (the direction of the guide slideway) is vertical to the base plate 105 to form connection, and in order to avoid falling off, the connection is also locked by a locking nut 106; the pressing rod passes through the guide sleeve 107 along the vertical direction and is matched with the guide sleeve in a reciprocating motion (generally, the pressing rod has a single degree of freedom); the lower ends of the

rocker arms

1031 and 1032 are symmetrically hinged to two sides of the guide sleeve 107 respectively, the structure is simple and practical, the whole locking assembly forms a module, and the hinged part is installed on the base plate after being completely processed;

the utility model provides a backward indicate the direction (the arrow in fig. 4) that drive lever 1022 swung when compressing tightly the work piece, the dorsal part then with backward corresponding one side, no longer describe herein.

Due to the action of the stopper 14, the resistance wall 1022 of the lever is prevented from further rotating, the rocker arm 1031 and the rocker arm 1031 cannot further rotate under the action of the stopper, that is, an interlock is formed, and the axis of the compression rod intersects with or goes back beyond the axis of the fulcrum (generally, the axes intersect), that is, a stable retraction mechanism is formed, and the release is avoided.

In this embodiment, the base is detachably and fixedly connected to the upper longitudinal beam 6, the driving lever is a right-angle structure taking a fulcrum as a boundary, the resistance arm 1022 forms a fork-shaped groove, the compression bar 101 is located in the fork-shaped groove and is hinged to the end of the resistance arm, the fork-shaped structure is beneficial to stable connection and does not apply a biasing force, so that the structure is stable and the service life is long; as shown in the figure, the driving lever is a right-angle structure (i.e. the power arm 1021 and the resistance arm 1022 are right-angled) using the fulcrum as a boundary, i.e. at the fulcrum, the power arm is bent forwards, so that the operation is convenient and the interference with the rocker arm (the limiting block) is avoided.

In this embodiment, the workpiece 9 is in tight contact with the upper shield ring 7 and the lower shield ring 10 to form a radial seal, which means that a seal ring is disposed on an end surface to prevent liquid from leaking in a radial direction.

In this embodiment, the reducing compensation part 3 is installed on the bottom plate 2 in a positioning manner and is coaxial with the bottom plate channel 201, a step for placing the lower shielding ring 10 is arranged on the inner circle, and the inner diameter of the step is larger than that of the lower shielding ring 10, so that the stable flow of the electroplating solution is ensured; the upper shielding ring 7 is coaxially arranged on the inner circle of the positioning sleeve 8, and the pressing component 1 presses the workpiece 9 through the upper shielding ring 7; the reducing compensation part 3 can be arranged on the bottom plate 2 in a positioning manner, and can adopt various mechanical structures, for example, an annular sinking groove is formed on a bottom plate channel 201 (the shape is the same as the radial overall dimension of the reducing compensation part, the reducing compensation part is arranged in the annular sinking groove to form transverse positioning, namely, a coaxial effect is achieved, or the reducing compensation part shown in the figure can be matched with the bottom plate channel through a shaft shoulder (stepped shaft) structure, namely, a small-diameter part penetrates through the bottom plate channel, and a shaft shoulder of a large-diameter part is pressed on the edge of the bottom plate channel to form positioning;

the part directly contacted with the workpiece (cylinder body) is generally sealed by an acid and alkali resistant fluororubber sealing ring, such as the sealing between the upper and lower shielding rings and the workpiece, so that the sealing is ensured, and meanwhile, the close contact between the shielding rings and the workpiece cylinder body can be ensured to successfully transfer burrs; the sealing which is not in direct contact with the workpiece adopts EVA foam (such as between a lower shielding ring and a reducing compensation part) so as to reduce the clamping action of an operator for placing/taking out the rubber ring and improve the clamping efficiency; as shown in the figure, the work piece is installed in the utility model discloses a afterwards, will the utility model discloses a frock moves to the electroplating device and cooperates through the protruding 1101 of location on empty 202 and the device 11 of locating hole, guarantees the plating solution runner cooperation of settling position and device, guarantees the normal clear of electroplating.

The plating outside the bath of the present invention refers to dynamic plating by circulating plating liquid outside the plating bath, and will not be described herein.

In this embodiment, an engine cylinder is taken as an example, and actually, the technical solution claimed in the present invention is not limited to the engine cylinder, but may be a compressor cylinder, a plunger pump cylinder, and other cylinders having similar structures, which are not described herein again.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a work piece fixing device for cylinder body external bath electroplates which characterized in that: comprises a fixed frame and a pressing component;

the pressing assembly is used for pressing the workpiece on the bottom plate and locking the workpiece.

2. The workpiece fixture for cylinder block out-of-tank plating according to claim 1, wherein: the frame is provided with a fixed upper longitudinal beam, the pressing assembly is arranged on the upper longitudinal beam, and a pressing part which can be driven to reciprocate up and down is arranged for pressing or releasing a workpiece.

3. The workpiece fixing device for cylinder block out-of-tank plating according to claim 2, characterized in that: the pressing assembly comprises a pressing rod capable of being driven to reciprocate up and down along the upper longitudinal beam and a lever assembly used for driving the pressing rod to reciprocate, and the pressing part is located at the lower end of the pressing rod.

4. A workpiece holding device for use in cylinder block out-of-tank plating as defined in claim 3 wherein: the lever assembly comprises a driving lever and a rocker arm, the resistance end of the lever is rotatably hinged to the upper end of the pressing rod, the lower end of the rocker arm can rotate in a single degree of freedom relative to the upper longitudinal beam, and the upper end of the rocker arm is coaxially hinged to the fulcrum of the driving lever in a single degree of freedom; the rocker arm is provided with a limiting block, and the limiting block limits the lever to continue rotating towards the pressing direction when the pressing rod is driven by the driving lever to press the workpiece, so that locking is realized.

5. A workpiece holding device for use in cylinder block out-of-tank plating as defined in claim 3 wherein: the pressing assembly further comprises a base, the base is fixed on the upper longitudinal beam, the pressing rod can reciprocate up and down in a single degree of freedom and is arranged on the base, the two rocker arms are respectively arranged on two sides of the base, and the lower ends of the two rocker arms are coaxially hinged to the base; when the pressing rod presses the workpiece through the pressing part, the axis of the pressing rod is intersected with or exceeds the axis of the fulcrum backwards, and at the moment, the limiting block supports against the resistance arm of the driving lever from the back side.

6. The workpiece fixture device for cylinder block out-of-tank plating according to claim 5, wherein: the base is detachably and fixedly connected to the upper longitudinal beam, the resistance arm forms a fork-shaped groove, and the pressing rod is located in the fork-shaped groove and hinged to the end portion of the resistance arm.

7. The workpiece fixture device for cylinder block out-of-tank plating according to claim 6, wherein: the pressing part is of a plate-shaped structure and is perpendicular to the pressing rod and fixed at the lower end of the pressing rod.

8. The workpiece fixing device for cylinder block out-of-tank plating according to claim 4, characterized in that: the driving lever is a right-angle structure taking a fulcrum as a boundary.

9. The workpiece fixture device for cylinder block out-of-tank plating according to claim 5, wherein: the base comprises a base plate and a guide sleeve, and a through hole for the compression rod to pass through is formed in the upper longitudinal beam; the guide sleeve is provided with a guide slideway and is fixed on the base plate, the guide slideway is vertically arranged right opposite to the through hole on the upper longitudinal beam, and the pressing rod penetrates through the guide slideway and is matched with the guide slideway in a way of reciprocating up and down; the base plate is detachably and fixedly connected with the upper longitudinal beam; the lower ends of the two rocker arms are symmetrically hinged on two sides of the guide sleeve respectively.

10. A workpiece holding device for use in cylinder block out-of-tank plating as defined in claim 3 wherein: the bottom plate is provided with a positioning hole for positioning and placing the bottom plate in the electroplating device and a functional hole for installing a workpiece.