Buoyancy box type hanger suitable for local plating of speed reducer shell gear

Abstract

The utility model discloses a floating box type hanger suitable for local plating of a speed reducer shell gear, which comprises an electroplating bath body, a main box body and an air chamber integrated titanium alloy central pressing plate assembly, and a suspension bracket is mounted at an opening of the electroplating bath body; the main box body is suspended on the suspension bracket through a hook and is positioned in the electroplating bath body; the speed reducer shell product is provided with a product main anode conductive titanium screw, and the product main anode conductive titanium screw is close to the window and is in the same axial direction with the window; and the air chamber integrated titanium alloy central pressing plate assembly is used for fixedly sealing the speed reducer shell product at the window and electroplating the gear surface of the speed reducer shell product, so that the gear surface uniformly permeates to generate an oxidation film. According to the utility model, the accuracy of the appearance surface and the assembly hole site of the speed reduction shell of the new energy automobile is ensured, the local plating of the gear of the speed reduction shell of the new energy automobile is realized, and the problem that the liquid leakage risk of the position and the hole site which can not be electroplated and can only be blocked by a silica gel plug in the traditional mode is very high is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroplating of reduction housings of new energy vehicles, in particular to a floating box type hanger suitable for local plating of gears of a reduction gear housing. Background Art

[0002] In new energy vehicles, the role of the main reduction gear is similar to that of traditional vehicles. However, since new energy vehicles use motors as driving force, the structure and design of the main reduction gear need to be adjusted accordingly. In electric vehicles, the motor provides power to the main reduction gear, and then transmits it to the wheels. In this process, the role of the main reduction gear is very important. Since the speed of the motor is limited, the main reduction gear must be used to reduce the speed so that the power can be transmitted to the wheels, thereby ensuring that the vehicle can drive normally. At the same time, the main reduction gear can also provide the required traction, so that the vehicle can reach a faster speed when starting. In addition to the transmission function, the main reduction gear also has an important steering control function. During the driving process of the vehicle, by turning left and right, the driving of the vehicle can become smoother and more stable. The main reduction gear can help the vehicle to perform precise steering control, and at the same time, it can help the vehicle maintain balance when turning to avoid accidents such as rollover. In addition, the main reduction gear also needs to meet the requirements of safety and reliability. Under high-speed driving conditions, the main reduction gear needs to withstand large impact loads, so high-strength materials must be used to reinforce the structure of the gearbox to ensure that it will not break. During the drive chain transmission process, the main reduction gear also needs to withstand a lot of friction and wear, so it needs lubrication and maintenance to ensure its normal operation.

[0003] In short, the main reduction gear of new energy vehicles is an important automotive component. It can not only realize power transmission and steering control, but also meet the requirements of safety and reliability. In the future, with the popularization of new energy vehicles and the continuous increase in market demand, the performance and quality of the main reduction gear will become more and more important. The planetary gear embedded in the reducer housing is used as a transmission part. There is a high demand for its hardness and wear resistance, and hard anodizing electroplating process is also required. The hard oxide film of aluminum parts generally requires a thickness of 25μm.

[0004] The reducer housing is a high-precision mechanical part. When doing hard anodizing electroplating, it is necessary to avoid the infiltration of oxide film on the workpiece's fine-machined surface, such as pin holes, oil leak holes, bearing holes, process positioning holes, etc. If the oxide film infiltrates into the important dimensional parts of the workpiece, it will seriously cause the deviation between the workpiece and other parts during assembly, thus causing the workpiece to be scrapped! Although the oxide film can be stripped off the body using the electroplating process, it is also a damage to the base material of the workpiece, so this method should not be adopted.

[0005] The reducer housing is used as a transmission component, and we only need to infiltrate the oxide film into the transmission part.

[0006] The existing technology uses silicone plugs for sealing, which has the risk of leakage; glass glue can be used for sealing, but it is more troublesome to clean up later. Utility Model Content

[0007] The utility model aims to provide a floating box type hanger suitable for local plating of gears of a reducer housing, so as to solve the problems raised in the above-mentioned background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A floating box type hanger suitable for local plating of reducer housing gears, comprising:

[0010] An electroplating tank body, wherein a hanging frame is installed at the opening of the electroplating tank body;

[0011] A main box body, which is hung on a hanging frame by a hook, is located in the electroplating tank, and has a window on the side of the main box body;

[0012] The reducer housing product is installed with the product's main anode conductive titanium screw, which is located in the main box;

[0013] An air chamber integrated titanium alloy center pressure plate assembly is used for electroplating the gear surface cavity of a reducer housing product fixedly sealed at a window, so that the gear surface cavity is uniformly infiltrated to form an oxide film.

[0014] Furthermore, the air chamber integrated titanium alloy center pressure plate assembly includes a center anode titanium rod with a channel, a clamping plate and an auxiliary cathode device. A gas-liquid mixed air chamber is installed at one end of the center anode titanium rod. The clamping plate is mounted on the center anode titanium rod to clamp the reducer housing product. The auxiliary cathode device is mounted on the connecting part of the gas-liquid mixed air chamber and extends into the gear face cavity.

[0015] Furthermore, the clamping plate includes a bottom cover pressure plate, an insulating pressure plate and a top plate. A top cover sealing ring is provided between the reducer housing product and the inner wall of the main box body. The bottom cover pressure plate, the insulating pressure plate and the top plate are mounted on the central anode titanium rod. The top plate is pushed by the tightening assembly so that the bottom cover pressure plate and the insulating pressure plate clamp the reducer housing product and seal the reducer housing product and the window.

[0016] Furthermore, the gas-liquid mixing chamber and the bottom cover pressure plate are located on one side of the gear surface, and the bottom cover pressure plate is in contact with the gear surface. The insulating pressure plate is located on the side opposite to the gear surface and in contact with the gear surface. The gas-liquid mixing chamber has a plurality of gas-liquid mixing nozzles inclined toward the gear surface cavity.

[0017] Furthermore, the auxiliary cathode device includes an auxiliary cathode insulating bushing and an auxiliary cathode, wherein the auxiliary cathode insulating bushing is sleeved on the connecting portion of the gas-liquid mixed gas chamber, and the auxiliary cathode is sleeved outside the auxiliary cathode insulating bushing.

[0018] Furthermore, the central anode titanium rod located on both sides of the insulating pressure plate is provided with a product center positioning inner ring, a top plate and a product center positioning outer ring, and the positioning nut is used to tighten the product center positioning outer ring, the top plate, the insulating pressure plate, the reducer housing product and the product center positioning inner ring on the central anode titanium rod.

[0019] Furthermore, an insulating gasket is provided between the positioning nut and the center positioning outer ring of the product.

[0020] Furthermore, a gas receiving device connected to the channel is installed at the other end of the central anode titanium rod, and the gas receiving device includes a one-way valve, which is connected to the channel and is equipped with a gas nozzle.

[0021] Furthermore, the tightening assembly includes a frame installed in the main box body and a pressure bolt inserted in the frame body, and one end of the pressure bolt is used to tighten the top plate.

[0022] Furthermore, a counterweight water tank is installed at the bottom of the main box body, and the longitudinal section of the counterweight water tank is V-shaped. The bottoms of the main box body and the counterweight water tank are both equipped with rubber plugs.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] Adding auxiliary anodes can solve the problem that the gear surface of the reducer housing product is deep, and the cathode plate in the oxidation process slot cannot completely radiate the gear surface, resulting in the thickness of the hard anodized film not reaching the expected effect.

[0025] In the utility model, the gear surface of the reducer housing product will generate high temperature locally due to oxidation reaction, and air needs to be taken in through the air receiving device to dissipate heat, so as to prevent the oxidation reaction from being too intense and burning the reducer housing product.

[0026] The utility model solves the problem of improving the appearance surface and assembly hole accuracy of the reduction housing of new energy vehicles, realizes partial plating of the gears of the reduction housing of new energy vehicles, and solves the problem that the traditional method can only use silicone plugs to block the positions that cannot be electroplated and the risk of leakage in the holes is very high. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model.

[0028] Figure 2 It is a top view schematic diagram of the utility model.

[0029] Figure 3 For the utility model Figure 2 Schematic diagram after removing the reducer housing product.

[0030] Figure 4 For the utility model Figure 1 Schematic diagram without the plating tank body.

[0031] Figure 5 For the utility model Figure 2 Schematic diagram looking up.

[0032] Figure 6 For the utility model Figure 4 Schematic diagram of removing the top cover sealing ring after removing the main box body.

[0033] Figure 7 For the utility model Figure 1 Schematic diagram of the cross-section (partial structure) at AA in the middle.

[0034] Figure 8 For the utility model Figure 7 Schematic diagram after removing the reducer housing product.

[0035] Fig. 9 It is a schematic diagram of the angle change of the reducer housing product of the utility model.

[0036] Fig.10 For the utility model Figure 8 (without the reducer housing product) three-dimensional schematic diagram.

[0037] Fig.11 For the utility model Fig.10 Schematic diagram from another perspective.

[0038] Fig.12 This is a schematic diagram of the prior art after electroplating.

[0039] Fig.13 This is a schematic diagram of the reducer housing product after electroplating of the utility model.

[0040] In the figure: 1-product main anode conductive titanium screw, 2-top cover sealing ring, 3-gas-liquid mixing chamber, 4-gas-liquid mixing nozzle, 5-auxiliary cathode, 6-auxiliary cathode insulating bushing, 7-bottom cover pressure plate, 8-product center positioning inner ring, 9-insulating pressure plate, 10-top plate, 11-check valve, 12-gas nozzle, 13-pressure bolt, 14-electroplating tank body, 15-main box body, 16-suspension frame, 17-hook, 18-mounting ear, 19-electroplating handle, 20-reducer housing product, 21-window, 22-rubber plug, 23-plug, 24-positioning nut, 25-product center positioning outer ring, 26-gasket, 27-frame, 28-counterweight water tank, 29-center anode titanium rod, 30-gear surface, 31-connecting part, 32-channel, 33-product top threaded hole, 34-center axis hole. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] In the description of the present invention, it should be noted that the terms "upper end", "lower end", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "sleeved", "sleeved", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] See also Figures 1 to 13 , the utility model provides a technical solution:

[0045] The reducer housing is a precision mechanical component. The main body of the reducer housing product 20 is made of die-cast aluminum. Only aluminum silicon alloy and aluminum magnesium alloy can be die-casted. Among them: aluminum silicon alloy has two categories: one is aluminum silicon manganese alloy. The other is aluminum silicon copper alloy. The fluidity of aluminum silicon manganese alloy is relatively good, and the surface finish can control the low porosity. It is widely used in engine housings and reducer housings, fuel tank caps, headlight covers, etc. in the automotive industry. The fluidity of aluminum silicon copper alloy is slightly worse, but the corrosion resistance is better than that of aluminum silicon manganese alloy. The die-cast aluminum workpiece produced at this time is a blank, and it is also necessary to use CNC five-axis linkage precision lathe for fine processing, assembly position of the workpiece, shape and position tolerance, surface roughness, etc. Because the planetary gears embedded in the reducer housing are used as transmission parts, there are high requirements for their hardness and wear resistance, and hard anodizing electroplating process is also required. The hard oxide film of aluminum parts generally requires a thickness of 25μm.

[0046] Hard anodizing electroplating process: 1. Depending on the thickness of the oxide film, the hardness of the aluminum alloy surface can reach up to about HV500. 50% of the generated oxide film penetrates into the aluminum alloy, and 50% adheres to the surface of the aluminum alloy (bidirectional growth). 2. It can make the workpiece have good insulation performance: the breakdown voltage can reach 2000V (perfect sealing). 3. Good wear resistance: for aluminum alloys with a copper content of no more than 2%, the maximum wear index is 3.5mg / 1000 revolutions. The wear index of all other alloys should not exceed 1.5mg / 1000 revolutions. 4. Non-toxic: The anodized film and the electrochemical process used to produce the anodized film should be harmless to the human body. Therefore, in order to reduce the weight of the product, facilitate mechanical processing, and meet the requirements of environmental protection and low toxicity, some parts of some products are currently replaced by aluminum alloy hard oxidation instead of stainless steel, electroplating hard chrome and other processes.

[0047] When we perform hard anodizing electroplating on high-precision mechanical parts such as reducer housing product 20, we need to avoid the infiltration of oxide film on the workpiece's finished surfaces such as pin holes, oil leak holes, bearing holes, and process positioning holes. If the oxide film infiltrates seriously into the important dimensional parts of the workpiece, it will cause excessive deviation between the workpiece and other parts during assembly, resulting in the scrapping of the workpiece! Although the oxide film can be stripped off the body using the electroplating process, it is also a kind of damage to the substrate of the workpiece, so this method cannot be adopted. The reducer housing is used as a transmission component, so we only need to infiltrate the transmission part with oxide film. Combined with the above description, we have fully understood the importance of the reducer housing gears. In order to improve the fatigue resistance and assembly process of the reducer housing gears, we have specially developed a floating box hanger suitable for local plating of reducer housing gears, including:

[0048] A floating box type hanger suitable for local plating of reducer housing gears, comprising:

[0049] An electroplating tank body 14, wherein a hanging bracket 16 is installed at the opening of the electroplating tank body 14;

[0050] A main box 15, wherein the main box 15 is hung on a hanging frame 16 via a hook 17, the main box 15 is located in the electroplating tank 14, and a window 21 is provided on a side of the main box 15;

[0051] The reducer housing product 20 is installed with the product main anode conductive titanium screw 1, which is located in the main box body 15;

[0052] An air chamber integrated titanium alloy center pressure plate assembly is used for electroplating the gear surface 30 cavity of the reducer housing product 20 fixedly sealed at the window 21, so that the gear surface 30 cavity is uniformly penetrated to form an oxide film with a thickness greater than 25μm (up to 40μm).

[0053] Specifically, the air chamber integrated titanium alloy center pressure plate assembly includes a center anode titanium rod 29 with a channel 32, a clamping plate and an auxiliary cathode device. A gas-liquid mixture chamber 3 is installed at one end of the center anode titanium rod 29. The clamping plate is mounted on the center anode titanium rod 29 to clamp the reducer housing product 20. The auxiliary cathode device is mounted on the connecting portion 31 of the gas-liquid mixture chamber 3 and extends into the cavity of the gear surface 30.

[0054] Specifically, the clamping part includes a bottom cover pressure plate 7, an insulating pressure plate 9 and a top plate 10. A top cover sealing ring 2 is provided between the reducer housing product 20 and the inner wall of the main box body 15. The bottom cover pressure plate 7, the insulating pressure plate 9 and the top plate 10 are mounted on the central anode titanium rod 29. The top plate 10 is pushed by the tightening assembly so that the bottom cover pressure plate 7 and the insulating pressure plate 9 clamp the reducer housing product 20 and seal the reducer housing product 20 and the window 21.

[0055] Specifically, the gas-liquid mixing chamber 3 and the bottom cover pressure plate 7 are located on one side of the gear surface 30, and the bottom cover pressure plate 7 is in contact with the gear surface 30. The insulating pressure plate 9 is located on the side opposite to the gear surface 30 and in contact with the gear surface 30. The gas-liquid mixing chamber 3 has a plurality of gas-liquid mixing nozzles 4 inclined toward the cavity of the gear surface 30.

[0056] Specifically, the auxiliary cathode device includes an auxiliary cathode insulating bushing 6 and an auxiliary cathode 5 . The auxiliary cathode insulating bushing 6 is sleeved on the connecting portion 31 of the gas-liquid mixed gas chamber 3 , and the auxiliary cathode 5 is sleeved outside the auxiliary cathode insulating bushing 6 .

[0057] Specifically, the central anode titanium rod 29 located on both sides of the insulating pressure plate 9 is provided with a product center positioning inner ring 8, a top plate 10 and a product center positioning outer ring 25, and the positioning nut 24 is used to tighten the product center positioning outer ring 25, the top plate 10, the insulating pressure plate 9, the reducer housing product 20 and the product center positioning inner ring 8 on the central anode titanium rod 29.

[0058] Specifically, an insulating gasket 26 is installed between the positioning nut 24 and the product center positioning outer ring 25 .

[0059] Specifically, the other end of the central anode titanium rod 29 is provided with a gas receiving device connected to the channel 32 , and the gas receiving device includes a one-way valve 11 , which is connected to the channel 32 and is provided with a gas nozzle 12 .

[0060] Specifically, the tightening assembly includes a frame body 27 installed in the main box body 15 and a pressure bolt 13 inserted in the frame body 27 , and one end of the pressure bolt 13 is used to tighten the top plate 10 .

[0061] Specifically, a counterweight water tank 28 is installed at the bottom of the main box body 15 , and the counterweight water tank 28 has a V-shaped longitudinal section. The bottoms of the main box body 14 and the counterweight water tank 28 are both equipped with rubber plugs 22 .

[0062] Specifically, the auxiliary cathode insulating bushing 6 is in contact with the bottom cover pressing plate 7 .

[0063] The utility model, main box 15: We have tried to use titanium TA2 material to make a welding box, but it increases the cost of the hanger. Hereby we use 6061-T5 aluminum profile. Under the premise of using this box, the box is first hard anodized. Insulation treatment is done to reduce production costs. There is not much difference in the processing and cutting process. The function of the main box 15 is to carry the reducer housing product 20.

[0064] The utility model, the counterweight water tank 28 below the main box body 15: has a side opening The hole position can be sealed with a conical rubber plug 22 (or a silicone plug). The carrier inside the counterweight water tank 28 can be tap water. Pure water can be used under favorable conditions.

[0065] The utility model adopts an integrated bending appearance of the counterweight water tank 28, which is partially welded and has reinforcing ribs welded on the side. The overall appearance is a sharp-angled cone at the bottom and the longitudinal section is V-shaped.

[0066] The utility model, the role of the weighted water tank 28 is to break the water surface tension, to prevent the main box 15 from floating on the water surface and being difficult to sink during the process of falling into the electroplating tank 14, causing the electroplating handle 19 to separate from the V seat.

[0067] In the present invention, the rubber plugs 22 of the main box 15 and the counterweight water tank 28 are used for drainage. This is because although the main box 15 needs to be kept dry, the main box 15 may need to be cleaned after the electroplating is completed and the reducer housing product 20 is taken out. After cleaning, the rubber plug 22 equipped thereon is pulled out to drain water. The counterweight water tank 28 needs to be filled with water, so it is not difficult to understand that when drainage is required, the rubber plug 22 equipped on the counterweight water tank 28 is pulled out to drain water. The function of the counterweight water tank 28 is to counterweight.

[0068] In the present invention, the hook 17 is used to support the main box 15, and the overall insulation is required to ensure that the suspension frame 16 and the main box 15 are not conductive or connected. The suspension frame 16 is the main part of the electroplated handle, and the material is a copper bar (main anode).

[0069] In the present invention, both ends of the suspension frame 16 are fixed to the electroplating tank body 14 through mounting ears 18, and the suspension frame 16 between the mounting ears 18 and the hook 17 is also provided with an electroplating handle 19, which serves as a hanger carrier. A water level line is provided on the outside of the electroplating tank body 14, and the area below the water level line covers the reducer housing product 20, which is the area that needs hard anodizing.

[0070] In order to ensure that the main anode current is connected to the reducer housing product 20, a 16 square silicone soft copper wire needs to be inserted into the top threaded hole 33 of the product. The hole specification is M14*tooth pitch 2.0mm, which is used as the main anode conductive hole.

[0071] In the present invention, the reducer housing product 20 is not installed before electroplating. During electroplating, the reducer housing product 20 needs to be installed in the main box 15. Specifically, Figures 8 to 11 As shown, the top cover sealing ring 2 is pre-mounted on the window 21 located in the main box body 15, and a gasket 26 and an auxiliary cathode insulating bushing 6 are first mounted on the connecting portion 31 of the gas-liquid mixed gas chamber 3, and then the auxiliary cathode 5 and a gasket 26 are mounted, and then the bottom cover pressing plate 7 is also mounted on the connecting portion 31, and then the connecting portion 31 is connected to the left end of the central anode titanium rod 29 (with the connecting portion 31 and the left end of the central anode titanium rod 29). Fig.10 Take the left end as an example, so it is screwed together and fixed together for use.

[0072] Take the reducer housing product 20 and put it into the main housing 15 from the box opening to the window 21, and then align the gear surface 30 with the top cover sealing ring 2. At this time, the axis of the reducer housing product 20 is aligned with the axis of the top cover sealing ring 2. Then insert the right end of the above-mentioned center anode titanium rod 29 to be used into the window 21 from the outside of the main housing 15, so that the center anode titanium rod 29 passes through the reducer housing product 20, and put the product center positioning inner ring 8 into the center axis hole 34 of the reducer housing product 20, and then put the insulating pressure plate 9, the top plate 10, the product center positioning outer ring 25 and another gasket 26 on the center anode titanium rod 29 after passing through the reducer housing product 20 in sequence, and finally screw the positioning nut 24 into the right end of the center anode titanium rod 29.

[0073] The gas-liquid mixture chamber 3 is held manually or by a manipulator (the nozzle 4 may not be installed when held) or the connecting portion 31, and a certain pulling force is applied to pull the central anode titanium rod 29 toward the outside of the main box body 15 along the axial direction of the central anode titanium rod 29, so that the reducer housing product 20 is tightened with the inner wall of the main box body 15 under the action of the top cover sealing ring 2, and then the positioning nut 24 is properly tightened with a wrench. After tightening the positioning nut 24 for a predetermined / required number of turns, the pressure bolt 13 on the frame 27 is screwed so that the end of the pressure bolt 13 contacts the top plate 10 and presses the top plate 10, thereby completely fixing the reducer housing product 20 (after releasing the hand, the nozzle 4 can be installed in the gas-liquid mixture chamber 3). After fixing, due to the action of the top cover sealing ring 2, effective sealing is achieved between the top cover sealing ring 2 and the window 21, and between the bottom cover pressure plate 7 and the gear surface 30. Finally, the one-way valve 11 is screwed to the right end of the central anode titanium rod 29, and then the air nozzle 12 is connected to the one-way valve 11, and the main anode conductive titanium screw 1 of the product is installed on the reducer housing product 20. The main anode conductive titanium screw 1 of the product is used for electrical conduction with the electroplated handle 19 of the main anode through a soft wire.

[0074] In the utility model, the gear surface 30 of the reducer housing product 20 is deep (with a concave cavity), and the cathode plate in the oxidation process slot cannot completely radiate the gear surface 30, resulting in the hard anodized film thickness not reaching the expected effect. The highest oxide film is only 16μm. For this reason, it is necessary to add an auxiliary cathode device, namely an auxiliary anode 5 and an auxiliary cathode insulating bushing 6. Wall thickness 1.5mm*H40mm6061-T5 material, with surrounding distribution The auxiliary cathode 5 is located on one side of the cavity of the gear surface 30 and as close to the cavity as possible, that is, located in the concave space. The auxiliary cathode 5 is welded to the soft silicone aluminum wire. The head uses an alligator clip to facilitate the later clamping on the cathode lead plate for effective connection, which is convenient for a small amount of cathode inside the cavity, effectively making the oxide film grow on both sides. The experiment has passed the test, and the oxide film has reached more than 40μm at the thickest point, meeting customer needs.

[0075] In the utility model, the electroplating tank body 14 is a hard anodized tank body, and the inner side of the tank is provided with a cathode lead plate and an auxiliary cathode. When a soft wire is used for connection, the negative current of the main cathode lead plate can be transmitted to the aluminum tube of the auxiliary cathode 5 (the auxiliary cathode material is an aluminum tube), and the aluminum tube of the auxiliary cathode is installed to the center surface of the cavity of the gear surface 30 using an insulating PP sheet (i.e., a gasket 26). The oxide film will penetrate in both directions, and it can form a layer of oxide film on the surface of the product profile. The medicine of this oxide film will slightly erode the gear surface 30 of the product profile when passing through the pre-treatment pickling tank. The oxide film medicine can better penetrate into the deep layer of the profile surface. The oxide film is perfectly attached.

[0076] In the utility model, the gear surface 30 of the reducer housing product 20 will generate high temperature locally due to oxidation reaction, and it is necessary to take in air through the air receiving device to dissipate heat, so as to prevent the oxidation reaction from being too intense and burning the workpiece (reducer housing product 20). It is necessary to connect the external air pumping device / equipment / gas source to the air receiving device to supply air to the air receiving device, so that the gas (and the required liquid medicine) enters the channel 32 through the air nozzle 12 and the one-way valve 11, and then enters the gas-liquid mixed air chamber 3, and is evenly sprayed from the nozzle 4 to the gear surface 30, so that the gear surface 30 is evenly infiltrated to form an oxide film, and at the same time, it also cools and dissipates heat for the workpiece, and the one-way valve 11 prevents the liquid medicine from flowing back into the main box 15.

[0077] In the present utility model, the product center positioning inner ring 8 and the product center positioning outer ring 25 are used for the central anode titanium rod 29 to pass through to achieve positioning and guiding. They are made of PP material, and the gasket 26 is also made of PP material. The insulating pressure plate 9 is made of PEEK insulating pressure plate. The top plate 10 is made of titanium TA2 material top plate. The nozzles 4 are evenly distributed around the gas-liquid mixed gas chamber 3, so that the gear surface 30 can be evenly penetrated to form an oxide film. There are multiple pressure bolts 13, and the number can be set according to the specific usage, such as 6 in a ring distribution with equal spacing.

[0078] In the present utility model, at least one reducer housing product 20 can be electroplated in the main housing 15, that is, a window 21 is opened accordingly. Of course, multiple reducer housing products 20 can also be electroplated according to the size of the main housing 15, that is, multiple windows 21 are opened. For example, the main housing 15 hanger can be used in one-out-of-six working conditions, that is, one main housing 15 can electroplate six reducer housing products 20 at a time. Of course, only five reducer housing products 20 are shown in the diagram of the present utility model. This is because if there is insufficient production and there are only five reducer housing products less than six pieces, or one or more of the six pieces have defects, the present utility model is also equipped with a plug 23. The plug 23 is used to block the serial port of the main housing 15 where the reducer housing product 20 is not hung, thereby achieving the sealing of the entire main housing 15. Figure 2As shown, at this time, it is only necessary to place the plug 23 at the corresponding window 21, where the top cover sealing ring 2 cooperates, and the end of the pressure bolt 13 of the corresponding tightening assembly is tightened against the back ridge 35 of the plug 23 to achieve sealing.

[0079] The utility model uses titanium TAI2, which has good tensile strength and hardness, and is resistant to acid, alkali, corrosion, and high temperature. The top cover sealing ring 2 and the bottom cover pressure plate 7 are sealed at two locations, which has a good sealing effect and a more streamlined structure (compared to the prior application, application number "2023232553756, a new energy vehicle reducer housing partial plating hanger").

[0080] like Fig.12 As shown, in the prior art, after the reducer housing product 20 is electroplated, the gear surface 30 cavity is prone to leaking oxide film liquid, which is easy to cause product appearance defects. However, after the reducer housing product 20 is electroplated using the hanger of the utility model, the oxide film liquid does not leak into the gear surface 30 cavity, and the cavity is uniformly infiltrated to form an oxide film, and the oxide film penetration effect is good. Under the premise of meeting the customer's requirement of 30μm, the oxide film thickness has reached more than 40μm.

[0081] The utility model,

[0082] 1. Solve the problem of the appearance of the reduction housing of new energy vehicles and the accuracy of the assembly holes.

[0083] 2. Start local plating of the gear of the reduction housing of new energy vehicles.

[0084] 3. Solve the problem that the traditional method can only use silicone plugs to block the holes where electroplating is not possible and the holes are leaking, which is very risky.

[0085] 4. Solve the problems of the previous hanger (application number is "a hanger for local plating of a new energy vehicle reducer housing" 2023232553756): single-cavity hanger (one-to-one hanger), bulky, difficult to install, and film thickness not meeting the standard.

[0086] 5. This floating box hanger can produce multiple (such as six) products at one time, which is more convenient and faster than the previous one-to-one hanger.

[0087] In general, the utility model realizes the accuracy of the assembly holes of the reduction housing of new energy vehicles, realizes the partial plating of the gears of the reduction housing of new energy vehicles, and solves the problem that the traditional method can only use silicone plugs to block the positions that cannot be electroplated.

[0088] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A floating box type hanger suitable for local plating of reducer housing gears, characterized in that: include: An electroplating tank body (14), wherein a hanging frame (16) is installed at the opening of the electroplating tank body (14); A main box (15), wherein the main box (15) is hung on a hanging frame (16) via a hook (17), the main box (15) is located in the electroplating tank (14), and a window (21) is provided on a side of the main box (15); The reducer housing product (20) is equipped with the product's main anode conductive titanium screw (1) and is located inside the main housing (15); An air chamber integrated titanium alloy center pressure plate assembly is used for electroplating the gear surface (30) cavity of a reducer housing product (20) fixedly sealed at a window (21) so that the gear surface (30) cavity is uniformly infiltrated to form an oxide film.

2. A buoyancy-type hanger suitable for partial plating of reducer housing gears as claimed in claim 1, characterized in that: The air chamber integrated titanium alloy central pressure plate assembly includes a central anode titanium rod (29) with a channel (32), a clamping plate and an auxiliary cathode device. A gas-liquid mixed air chamber (3) is installed at one end of the central anode titanium rod (29). The clamping plate is mounted on the central anode titanium rod (29) to clamp the reducer housing product (20). The auxiliary cathode device is mounted on the connecting portion (31) of the gas-liquid mixed air chamber (3) and extends into the gear surface (30) cavity.

3. A buoyancy-type hanger suitable for partial plating of reducer housing gears as claimed in claim 2, characterized in that: The clamping plate comprises a bottom cover pressure plate (7), an insulating pressure plate (9) and a top plate (10); a top cover sealing ring (2) is provided between the reducer housing product (20) and the inner wall of the main box body (15); the bottom cover pressure plate (7), the insulating pressure plate (9) and the top plate (10) are mounted on the central anode titanium rod (29); the top plate (10) is pushed by a tightening assembly so that the bottom cover pressure plate (7) and the insulating pressure plate (9) clamp the reducer housing product (20), and the reducer housing product (20) and the window (21) are sealed.

4. A buoyancy-type hanger suitable for partial plating of reducer housing gears as claimed in claim 3, characterized in that: The gas-liquid mixing chamber (3) and the bottom cover pressure plate (7) are located on one side of the gear surface (30), and the bottom cover pressure plate (7) is in contact with the gear surface (30). The insulating pressure plate (9) is located on the side opposite to the gear surface (30) and in contact with the gear surface (30). The gas-liquid mixing chamber (3) has a plurality of gas-liquid mixing nozzles (4) inclined toward the cavity of the gear surface (30).

5. A buoyancy-type hanger suitable for partial plating of reducer housing gears as claimed in claim 2, characterized in that: The auxiliary cathode device comprises an auxiliary cathode insulating bushing (6) and an auxiliary cathode (5), wherein the auxiliary cathode insulating bushing (6) is sleeved on the connecting portion (31) of the gas-liquid mixed gas chamber (3), and the auxiliary cathode (5) is sleeved outside the auxiliary cathode insulating bushing (6).

6. A buoyancy-type hanger suitable for partial plating of reducer housing gears as claimed in claim 3, characterized in that: The central anode titanium rod (29) located on both sides of the insulating pressure plate (9) is provided with a product center positioning inner ring (8), a top plate (10) and a product center positioning outer ring (25). The positioning nut (24) is used to tighten the product center positioning outer ring (25), the top plate (10), the insulating pressure plate (9), the reducer housing product (20) and the product center positioning inner ring (8) on the central anode titanium rod (29).

7. A buoyancy-type hanger suitable for partial plating of reducer housing gears as claimed in claim 6, characterized in that: An insulating gasket (26) is mounted between the positioning nut (24) and the product center positioning outer ring (25).

8. A buoyancy-type hanger suitable for partial plating of reducer housing gears as claimed in claim 2, characterized in that: The other end of the central anode titanium rod (29) is provided with a gas receiving device connected to the channel (32), wherein the gas receiving device comprises a one-way valve (11), wherein the one-way valve (11) is connected to the channel (32), and a gas nozzle (12) is provided on the one-way valve (11).

9. A buoyancy-type hanger suitable for partial plating of reducer housing gears as claimed in claim 3, characterized in that: The tightening assembly comprises a frame (27) installed in the main box (15) and a pressure bolt (13) inserted in the frame (27), and one end of the pressure bolt (13) is used to tighten the top plate (10).

10. A buoyancy-type hanger suitable for partial plating of gears in a reducer housing as claimed in claim 1, characterized in that: A counterweight water tank (28) is installed at the bottom of the main box body (15), and the counterweight water tank (28) has a V-shaped longitudinal section. The bottoms of the main box body (15) and the counterweight water tank (28) are both equipped with rubber plugs (22).

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