An electroplating fixture for chrome plating of piston rods

Abstract

This utility model discloses an electroplating fixture for chrome plating piston rods, comprising: a main conductive copper busbar connected to the negative terminal of an electroplating power supply; multiple branch copper busbars uniformly arranged along the axial direction of the main conductive copper busbar; the top ends of the branch copper busbars fixedly connected to the main conductive copper busbar, and the bottoms having multiple circular through holes; multiple sleeves correspondingly disposed within the circular through holes; multiple side bolts correspondingly disposed radially along the sleeves and engaging with the corresponding sleeves to lock the piston rod; and multiple positioning plates correspondingly slidably disposed on the inner walls of the branch copper busbars, with the relative positions of the positioning plates and the branch copper busbars locked by positioning locking bolts. The electroplating fixture for chrome plating piston rods provided by this utility model can adapt to workpieces with different non-chrome plating area lengths, has high clamping efficiency, and ensures consistent non-chrome plating area lengths for workpieces in the same batch.

Description

Technical Field

[0001] This utility model belongs to the technical field of piston rod electroplating equipment, and specifically relates to an electroplating fixture for chromium plating of piston rods. Background Technology

[0002] As a crucial device connecting the electroplating power source and the workpiece to be plated, the performance of electroplating racks directly affects the quality and production efficiency of electroplating. For a long time, traditional electroplating racks have faced several pressing problems: First, due to the varying lengths of the non-chromium-plated areas on different workpieces, to meet production demands, it is often necessary to design and manufacture corresponding electroplating fixtures for each workpiece of different non-chromium-plated lengths. This not only significantly increases the cost of fixture design and manufacturing for enterprises but also makes the storage and management of fixtures extremely complex, consuming substantial human and material resources. Second, existing electroplating racks mostly use hand-tightened threaded connections when clamping workpieces. This method is cumbersome, time-consuming, and extremely inefficient in loading and unloading, severely restricting the overall production rhythm of the electroplating production line and failing to meet the requirements of modern large-scale, high-efficiency production. Therefore, developing a universal electroplating rack that can adapt to workpieces of different non-chromium-plated area lengths and has high clamping efficiency has become an urgent need for the electroplating industry to improve production efficiency and reduce production costs. Utility Model Content

[0003] The purpose of this invention is to provide an electroplating fixture for chrome plating of piston rods, which can adapt to workpieces with different non-chrome plating area lengths, has high clamping efficiency, and ensures that the non-chrome plating area lengths of the same batch of workpieces are consistent.

[0004] The technical solution provided by this utility model is as follows:

[0005] An electroplating fixture for chrome plating of piston rods, comprising:

[0006] The main conductive copper busbar is connected to the negative terminal of the electroplating power supply.

[0007] Multiple branch copper busbars are evenly arranged along the axial direction of the main conductive copper busbar; the top of each branch copper busbar is fixedly connected to the main conductive copper busbar, and the bottom is provided with multiple circular through holes;

[0008] Multiple sleeves are arranged one-to-one within the circular through hole;

[0009] Multiple side-top bolts are arranged radially along the sleeve, and cooperate with the corresponding sleeve to lock the piston rod;

[0010] Multiple positioning plates are slidably mounted on the inner wall of the branch copper busbar, and the relative positions of the positioning plates and the branch copper busbar are locked by positioning locking bolts.

[0011] Preferably, the main conductive copper busbar includes:

[0012] Rectangular border;

[0013] Two power connection points are symmetrically arranged on the outside of the rectangular frame and are electrically connected to the negative terminal of the electroplating power supply via wires.

[0014] Preferably, the branch copper busbar includes:

[0015] The first base plate has multiple circular through holes evenly distributed on its surface;

[0016] Two first side plates are arranged perpendicular to the first base plate; one end of each of the two first side plates is fixedly connected to both ends of the first base plate, and the other end of each of the two first side plates is fixedly connected to the rectangular frame.

[0017] Preferably, the positioning plate includes:

[0018] The second base plate is arranged parallel to the first base plate;

[0019] Two second side plates are provided, each perpendicular to the second base plate; one end of each of the two second side plates is fixedly connected to both ends of the second base plate.

[0020] Two elongated slots are respectively provided on the corresponding second side plates along the length direction of the second side plate; the positioning locking bolts are provided in the elongated slots and are threadedly connected to the first side plate.

[0021] Preferably, the head diameter of the positioning locking bolt is greater than the width of the long through groove, and the length of the long through groove is not less than half the length of the second side plate.

[0022] Preferably, the branch copper busbar and the positioning plate are both integrally formed structures.

[0023] Preferably, the sleeve comprises:

[0024] The inner sleeve has a limiting ring at one end and is inserted into the circular through hole at the other end; the inner sleeve has a first bolt through hole on its side wall.

[0025] A shielding sleeve is installed below the branch copper busbar; one end of the shielding sleeve is fixedly connected to the other end of the corresponding sleeve.

[0026] A locking nut is located below the branch copper busbar and is fitted onto the outer wall of the sleeve; the side wall of the locking nut is provided with a second bolt through hole;

[0027] The first bolt through hole corresponds to and is coaxially arranged with the second bolt through hole; the inner sleeve, the shielding sleeve and the locking nut are all coaxially arranged.

[0028] Preferably, the side top bolt is arranged radially along the locking nut, threadedly connected to the second bolt through hole, and passes through the second bolt through hole and the first bolt through hole to abut against the piston rod to lock the piston rod.

[0029] The beneficial effects of this utility model are: the electroplating fixture for chrome plating of piston rods provided by this utility model can adapt to workpieces with different non-chrome plating area lengths, has high clamping efficiency, and ensures that the non-chrome plating area lengths of the same batch of workpieces are consistent. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the electroplating fixture for chrome plating of piston rods according to this utility model.

[0031] Figure 2 This is a side view of the electroplating fixture for chrome plating of piston rods according to this utility model.

[0032] Figure 3 This is a schematic diagram of the overall structure of the branch copper busbar described in this utility model.

[0033] Figure 4 This is a schematic diagram of the overall structure of the positioning plate described in this utility model.

[0034] Figure 5 This is a cross-sectional view AA of the electroplating fixture for chrome plating of the piston rod described in this utility model.

[0035] Figure 6 This is an enlarged view of section B as described in this utility model.

[0036] Reference numerals: Main conductive copper busbar 110, rectangular frame 111, power connection part 112, branch copper busbar 120, first base plate 121, first side plate 122, circular through hole 123, threaded hole 124, positioning plate 130, second base plate 131, second side plate 132, long through groove 133, inner sleeve 141, shielding sleeve 142, locking nut 143, positioning locking bolt 151, side top bolt 152, piston rod 160. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0038] like Figure 1-2As shown, this utility model provides an electroplating fixture for chrome plating piston rods, comprising: a main conductive copper busbar 110, which includes: a rectangular frame 111; two power connection parts 112, symmetrically arranged on the outer side of the wide side of the rectangular frame 111, fixedly connected to the rectangular frame 111, and electrically connected to the negative terminal of the electroplating power supply via a wire; multiple branch copper busbars 120, uniformly arranged along the axial direction of the main conductive copper busbar 110; the top of each branch copper busbar 120 is fixedly connected to the main conductive copper busbar 110 by bolt thread engagement, and the bottom is provided with multiple circular through holes 123; in this embodiment, the number of branch copper busbars 120 is 8, and each branch copper busbar 120 is provided with 3 circular through holes 123; multiple sleeves, each corresponding to one of the circular through holes 123, and coaxially arranged with the corresponding circular through holes 123; and multiple side bolts 152, each corresponding to one of the sleeves radially, and engaging with the corresponding sleeves to lock the piston rod 160. Multiple positioning plates 130 are slidably disposed on the inner wall of the branch copper busbar 120 in a corresponding manner, and the relative positions of the positioning plates 130 and the branch copper busbar 120 are locked by positioning locking bolts 151; in this embodiment, the number of positioning plates 130 is 8.

[0039] like Figure 3 As shown, the branch copper busbar 120 is an integrally formed structure, and the branch copper busbar 120 has an overall U-shaped structure. Each branch copper busbar 120 includes: a first base plate 121, the surface of which is uniformly provided with a plurality of circular through holes 123; two first side plates 122, which are both perpendicular to the first base plate 121; both ends of the first base plate 121 are fixedly connected to one end of the two first side plates 122, and the other ends of the two first side plates 122 are fixedly connected to the inner wall of the rectangular frame 111; a threaded hole 124 is provided in the middle of the first side plate 122. The first base plate 121 and the two first side plates 122 are both rectangular flat plates.

[0040] like Figure 4As shown, the positioning plate 130 is an integrally formed structure with an overall U-shaped structure. The positioning plate 130 includes: a second base plate 131, which is parallel to the first base plate 121; two second side plates 132, both perpendicular to the second base plate 131; both ends of the second base plate 131 are fixedly connected to one end of each of the two second side plates 132; two elongated slots 133 are arranged along the length of the second side plates 132 and respectively disposed on their corresponding sides; a positioning locking bolt 151 is disposed within the elongated slot 133 and threadedly connected to the first side plate 122 through a threaded hole 124. The head diameter of the positioning locking bolt 151 is greater than the width of the elongated slot 133, and the length of the elongated slot 133 is not less than half the length of the second side plate 132. The second base plate 131 and the two second side plates 132 are both rectangular flat plates.

[0041] like Figure 5-6 As shown, the sleeve includes: an inner sleeve 141, one end of which is provided with a limiting ring for securing the inner sleeve 141 above the first base plate 121, and the other end correspondingly passing through the circular through hole 123; the inner sleeve 141 has a first bolt through hole on its side wall; a shielding sleeve 142, which is disposed below the branch copper busbar 120; one end of the shielding sleeve 142 is fixedly connected to the other end of the corresponding sleeve; and a locking nut 143, which is disposed below the branch copper busbar 120, and the shielding sleeve 142... Above, and fitted onto the outer wall of the middle part of the sleeve; the locking nut 143 is tightened upwards, and the limiting ring and the locking nut 143 work together to clamp, thereby fixing the inner sleeve 141 in the circular through hole 123; the side wall of the locking nut 143 is provided with a second bolt through hole, which is a threaded hole; wherein, the first bolt through hole and the second bolt through hole correspond one-to-one and are coaxially arranged; the inner sleeve 141, the shielding sleeve 142 and the locking nut 143 are all coaxially arranged. The side top bolt 152 is arranged radially along the locking nut 143, threadedly connected to the second bolt through hole, and passes through the second bolt through hole and the first bolt through hole to abut against the piston rod 160, thereby locking and fixing the piston rod 160.

[0042] The electroplating fixture is used as follows: Based on the required length of the non-chrome-plated area of ​​the piston rod 160, the positioning plate 130 is slid along the inner wall of the branch copper busbar 120 to the required position. The positioning locking bolt 151 is engaged with the threaded hole 124 to lock the relative position of the positioning plate 130 and the branch copper busbar 120. The piston rod 160 is passed through the shielding sleeve 142 and the inner sleeve 141 in sequence, so that one end of the piston rod 160 is in contact with the positioning plate 130. The side top bolt 152 is engaged with the locking nut 143 to make the side top bolt 152 abut against the piston rod 160, thus fixing the piston rod 160. The main conductive copper busbar 110 is connected to the negative terminal of the electroplating power supply, and the electrolytic tank is connected to the positive terminal of the electroplating power supply. The electroplating solution is placed in the electrolytic tank. The part of the piston rod 160 to be electroplated is immersed in the electroplating solution using the electroplating fixture. After power is applied, the chrome plating operation of the piston rod 160 is performed.

[0043] The electroplating fixture for chrome plating piston rods provided by this utility model can adapt to workpieces with different non-chrome plating area lengths, has high clamping efficiency, and ensures that the non-chrome plating area length of the same batch of workpieces is consistent. The electroplating fixture achieves "one fixture for multiple uses" through multiple sets of adjustable structures. On the one hand, the branch copper busbars are evenly distributed along the axial direction of the main conductive copper busbar and have multiple circular through holes at the bottom, which can clamp multiple piston rods at the same time. The positioning plate can slide along the inner wall of the branch copper busbar and be locked to different positions by positioning locking bolts, accurately matching the non-chrome plating area requirements of piston rods of different lengths, without the need to make separate tooling for each specification. On the other hand, the sleeves correspond one-to-one with the circular through holes and are set coaxially. With the radial locking structure of the side top bolts, it can adapt to piston rods of different diameters, greatly reducing the tooling change frequency, and is especially suitable for multi-variety, small-batch piston rod chrome plating production scenarios. Compared to the cumbersome clamping method of traditional hand-tightening threads, this hanger adopts a quick-locking structure using a side-mounted bolt and a locking nut: the side-mounted bolt and the second bolt of the locking nut are threaded together, and only the side-mounted bolt needs to be rotated to achieve the piston rod's clamping and fixing, eliminating the need for repeated disassembly of the entire structure. Simultaneously, the sliding adjustment and locking of the positioning plate are completed through a single positioning locking bolt, simplifying the operation steps, effectively shortening loading and unloading time, and reducing manual labor intensity. The core conductive components of the electroplating hanger are made of copper, which has excellent conductivity and can reduce contact resistance during current transmission. Furthermore, the branch copper busbars are directly fixedly connected to the main conductive copper busbars, and the sliding mating surfaces of the positioning plate and the branch copper busbars fit tightly, avoiding problems such as excessive local current or power outages due to poor contact. The rectangular frame of the main conductive copper busbar provides stable support, while the branch copper busbars and positioning plates are integrally molded, avoiding stress fracture issues at welding or splicing points. The sleeve is fixed in place within the circular through-hole by a bidirectional clamping mechanism using a limiting ring and a locking nut, maintaining stable position even after prolonged immersion in the electroplating bath or exposure to solution impact, preventing loosening. The abutting end of the side-mounted bolt fits tightly against the piston rod, and the threaded connection of the locking nut prevents loosening due to vibration during electroplating, reducing component wear, extending the overall lifespan of the fixture, and lowering equipment maintenance costs. The shielding sleeve, fixed below the inner sleeve and made of insulating material, precisely covers the non-chrome-plated area of ​​the piston rod, preventing contact between this area and the electroplating solution. Simultaneously, the top-fitting mechanism between the positioning plate and the piston rod further limits the electroplating range, preventing accidental plating of non-chrome-plated areas due to shielding misalignment, reducing subsequent rework steps, and improving product yield. In addition, the shielding sleeve is coaxially connected with the inner sleeve of the hole, making it easy to disassemble and assemble. It also allows for the replacement of shielding sleeves of different lengths according to the specifications of the piston rod, further expanding the applicability of the hanger.

[0044] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An electroplating fixture for chrome plating of piston rods, characterized in that, include: The main conductive copper busbar is connected to the negative terminal of the electroplating power supply. Multiple branch copper busbars are evenly arranged along the axial direction of the main conductive copper busbar; the top of each branch copper busbar is fixedly connected to the main conductive copper busbar, and the bottom is provided with multiple circular through holes; Multiple sleeves are arranged one-to-one within the circular through hole; Multiple side bolts are arranged radially along the sleeve and cooperate with the corresponding sleeve to lock the piston rod; Multiple positioning plates are slidably mounted on the inner wall of the branch copper busbar, and the relative positions of the positioning plates and the branch copper busbar are locked by positioning locking bolts.

2. The electroplating fixture for chrome plating of piston rods according to claim 1, characterized in that, The main conductive copper busbar includes: Rectangular border; Two power connection points are symmetrically arranged on the outside of the rectangular frame and are electrically connected to the negative terminal of the electroplating power supply via wires.

3. The electroplating fixture for chrome plating of piston rods according to claim 2, characterized in that, The branch copper busbar includes: The first base plate has multiple circular through holes evenly distributed on its surface; Two first side plates are arranged perpendicular to the first base plate; one end of each of the two first side plates is fixedly connected to both ends of the first base plate, and the other end of each of the two first side plates is fixedly connected to the rectangular frame.

4. The electroplating fixture for chrome plating of piston rods according to claim 3, characterized in that, The positioning plate includes: The second base plate is arranged parallel to the first base plate; Two second side plates are provided, each perpendicular to the second base plate; one end of each of the two second side plates is fixedly connected to both ends of the second base plate. Two elongated slots are respectively provided on the corresponding second side plates along the length direction of the second side plate; the positioning locking bolts are provided in the elongated slots and are threadedly connected to the first side plate.

5. The electroplating fixture for chrome plating of piston rods according to claim 4, characterized in that, The head diameter of the positioning locking bolt is greater than the width of the long through groove, and the length of the long through groove is not less than half the length of the second side plate.

6. The electroplating fixture for chrome plating of piston rods according to claim 4, characterized in that, Both the branch copper busbar and the positioning plate are integrally formed structures.

7. The electroplating fixture for chrome plating of piston rods according to claim 1, characterized in that, The sleeve includes: The inner sleeve has a limiting ring at one end and is inserted into the circular through hole at the other end; the inner sleeve has a first bolt through hole on its side wall. A shielding sleeve is installed below the branch copper busbar; one end of the shielding sleeve is fixedly connected to the other end of the corresponding sleeve. A locking nut is located below the branch copper busbar and is fitted onto the outer wall of the sleeve; the side wall of the locking nut is provided with a second bolt through hole; The first bolt through hole corresponds to and is coaxially arranged with the second bolt through hole; the inner sleeve, the shielding sleeve and the locking nut are all coaxially arranged.

8. The electroplating fixture for chrome plating of piston rods according to claim 7, characterized in that, The side bolt is arranged radially along the locking nut, threadedly connected to the second bolt through hole, and passes through the second bolt through hole and the first bolt through hole to abut against the piston rod to lock the piston rod.

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