Hanging tool for plating chromium on surface of engine valve

Abstract

The utility model belongs to the technical field of engine processing, and particularly relates to an engine valve surface chromium plating hanger which comprises an anode cylinder, a valve clamp and a shielding sleeve, and a conductive copper bar is arranged on the side wall of the anode cylinder; the valve clamp comprises a valve seat and a pressing mechanism, and two limiting rods are arranged on the outer side wall of the valve seat; the pressing mechanism comprises a clamping block, a clamping groove is formed in the clamping block, a sliding groove is formed in the side wall of the clamping groove, a limiting groove is formed in the side wall of the sliding groove, a positioning rod penetrates through the bottom face of the clamping groove, a pressing head is arranged at one end of the positioning rod, a limiting nut is arranged at the other end of the positioning rod, the positioning rod is sleeved with a pressing spring, one end of the pressing spring abuts against the pressing head, the other end of the pressing spring abuts against the clamping groove, and a conductive support is arranged at the top end of the positioning rod. The shielding sleeve sleeves the tail end of the valve. The tail end of the valve penetrates through the valve seat and then is sleeved with the shielding sleeve, the valve seat is clamped in the clamping groove, the limiting rod slides along the sliding groove, the valve seat is rotated to enable the limiting rod to be clamped in the limiting groove, the positioning rod abuts against the head of the valve under the action of the compression spring, clamping and fixing of the valve are completed, and the valve clamp is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of engine processing, in particular to a chrome-plated hanger for the surface of an engine valve. Background Art

[0002] The valve is a seal that seals the combustion chamber and controls the gas exchange during engine operation. As a key engine component, it is required to have good wear resistance and service life. Therefore, the valve stem is usually hard chrome plated. During the hard chrome plating process, the valve needs to be hung on the electroplating rack. The rack and the valve enter the plating tank together. After electroplating, the rack and the valve enter the post-plating cleaning tank together. After a series of processes, the valve with excellent wear resistance can be obtained.

[0003] The existing publication number CN103572357A is a special hanger for chrome plating of finished valves, which has a conductive main rod; a hanger bracket plate, which is distributed on both sides of the conductive main rod and has at least one horizontal part; an insulating isolation part, which is located at the lower end of the conductive main rod and is arranged between the hanger bracket plates; a protective cover, which starts from the side wall of the conductive main rod and ends at the free end of the horizontal part of the hanger bracket plate and the end located in the extension direction is open; a plurality of valve conductive wires arranged along the extension direction of the conductive main rod, which are symmetrically arranged on the two side walls of the conductive main rod and are L-shaped; a bracket assembly, which is located on the hanger bracket plate below the free end of the valve conductive wire; a clamp assembly, which is detachably connected to the bracket assembly; a rod-shaped adjustment mechanism, which is provided in the bracket assembly and has the upper end connected to the free end of the valve conductive wire and the lower end leading to the clamp assembly. The clamp assembly includes: a bayonet-type positioning sleeve that can be detachably mounted on the lower plate of the bracket assembly, which has two symmetrical positioning pieces arranged on the upper edge and an internal thread arranged on the bayonet-type positioning sleeve, and the spacing between the two positioning pieces matches the lower plate of the bracket assembly; a valve seat arranged in the positioning sleeve, which has a head with a stepped groove and a tail with a hole A, and the lower end of the valve clamping conductive rod extends into the lower groove of the stepped groove and is tightened against the valve head located in the lower groove, the head is provided with an external thread matching the internal thread of the bayonet-type positioning sleeve, and the tail is provided with an external thread; upper and lower shielding sleeves are sleeved on the non-chrome-plated part of the valve, which have a valve stem assembly hole, and the lower shielding sleeve is arranged at the lower end of the valve; an upper shielding clamping cover with an upper shielding sleeve inside, which is installed on the tail of the valve seat by an internal thread matching the external thread of the tail of the valve seat, and the upper shielding clamping cover has a cavity with an opening on one side and a hole B communicating with it.

[0004] When this type of clamp is used to clamp the valve, the valve needs to be clamped in the valve seat first. Since the valve seat is sealed against the valve, a lot of effort is required to insert the valve into the valve seat. At this time, the positioning piece is on the inner wall of the valve seat, which can easily scratch the worker's palm and affect the worker's safety. In addition, the shielding and tightening cover on the clamp assembly in this type of hanger is installed through threads. During installation, the lower plate needs to move away from the positioning piece on the positioning sleeve, and then rotate it and clamp the lower plate through the positioning piece. The lower plate has symmetrical milled edges, so the lower plate cannot seal the valve seat. If electroplating liquid enters from the gap between the milled edge of the lower plate and the valve seat, it will affect the electroplating effect of the valve.

[0005] In view of the above problems, the present utility model document proposes a chrome-plated hanger for the surface of an engine valve. Utility Model Content

[0006] The utility model provides a chrome-plated hanger for the surface of an engine valve, which reduces the difficulty of operating the hanger, improves work efficiency, and also increases the safety factor of workers' operation.

[0007] The utility model provides the following technical solutions:

[0008] A chrome-plated hanger for engine valve surfaces, comprising an anode cylinder, a valve fixture, and a shielding sleeve. The side wall of the anode cylinder is connected to a conductive copper bar, and the anode cylinder sliding sleeve is arranged on the outside of the valve fixture; the valve fixture comprises a valve seat and a clamping mechanism located above the valve seat. The valve seat is a funnel-shaped structure, and two limit rods are vertically provided on its outer wall, and the two limit rods are symmetrically arranged; the clamping mechanism comprises a clamping block, and a clamping groove matching the valve seat is formed on the surface adjacent to the clamping block and the valve seat. The side wall of the slot is provided with a sliding groove matching the limit rod along the height direction of the slot, and the two side walls of the slot are provided with limit grooves in the clockwise or counterclockwise direction. A positioning rod is provided through the bottom surface of the slot, and a pressure head is provided at one end of the positioning rod adjacent to the valve seat, and a limiting nut is provided at the other end. A clamping spring is also provided on the positioning rod, and one end of the clamping spring rests on the pressure head, and the other end rests on the bottom surface of the slot. The top end of the positioning rod is connected to a conductive bracket; the shielding sleeve is provided on the tail end of the valve.

[0009] Furthermore, a connecting rod is vertically provided on the side of the clamping block facing away from the valve seat, and a mounting plate is provided on the connecting rod, and a mounting hole is opened on the mounting plate.

[0010] Furthermore, a clearance hole is provided on the mounting plate at a position corresponding to the positioning rod.

[0011] Furthermore, a positioning hole for holding the valve is opened in the middle of the valve seat, and the top diameter of the positioning hole is larger than the bottom diameter.

[0012] Furthermore, a plurality of sliding grooves are staggeredly arranged on the side walls of the limiting groove.

[0013] Furthermore, the limiting groove is arranged perpendicular to the sliding groove.

[0014] Furthermore, the limiting groove is arranged to be inclined downward.

[0015] Furthermore, a through hole is opened on the side wall of the anode cylinder.

[0016] Furthermore, the shielding sleeve includes a sleeve, a side wall of one end of the sleeve is provided with a ring plate, and a guide hole is opened on the ring plate.

[0017] In the present invention, the tail end of the valve passes through the valve seat and is put on a shielding sleeve, and then is clamped in the clamping block slot through the valve seat, the limit rod slides along the slide slot, and then the valve seat is rotated so that the limit rod is clamped in the limit slot on the side wall of the slide slot, and the positioning rod rests on the valve head under the elastic force of the compression spring, thereby completing the clamping and fixing of the valve, by passing the anode electricity to the conductive copper bus of the anode tube and the cathode electricity to the conductive bracket connected to the positioning rod, and then chrome-plating is performed on the middle part of the valve. The valve clamp has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a chrome-plated hanger for an engine valve surface provided by an embodiment of the utility model;

[0019] Figure 2 A schematic cross-sectional view of a shielding sleeve in a chrome-plated hanger for an engine valve surface provided by an embodiment of the present utility model;

[0020] Figure 3 A schematic cross-sectional view of a pressing mechanism in a chrome-plated hanger for an engine valve surface provided by an embodiment of the present utility model;

[0021] Figure 4 A schematic cross-sectional view of a valve seat in a chrome-plated hanger for an engine valve surface provided by an embodiment of the present invention;

[0022] Figure 5 A schematic cross-sectional view of an embodiment of a clamping block in a chrome-plated hanger for an engine valve surface provided by the present utility model;

[0023] Figure 6 The present invention is a cross-sectional structural diagram of another embodiment of a clamping block in a chrome-plated hanger for an engine valve surface provided by the present invention.

[0024] Reference numerals:

[0025] 1. Anode cylinder; 101. Through hole; 2. Conductive copper busbar; 3. Clamping mechanism; 301. Clamping block; 302. Slot; 303. Positioning rod; 304. Pressure head; 305. Slide; 306. Limiting groove; 307. Limiting nut; 308. Compression spring; 4. Valve seat; 401. Limiting rod; 402. Positioning hole; 5. Shielding sleeve; 501. Sleeve; 502. Ring plate; 503. Guide hole; 6. Mounting plate; 7. Connecting rod; 8. Clearance hole. DETAILED DESCRIPTION

[0026] The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0027] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection", and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct connection or an indirect connection through an intermediate medium. Here, "fixed" means that the two are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying 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 embodiments of the present invention.

[0028] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0029] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0030] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present invention. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0031] Example 1:

[0032] Reference Figures 1 to 5 As shown, a chrome-plated hanger for engine valve surface includes an anode cylinder 1, a valve fixture and a shielding sleeve 5. The side wall of the anode cylinder 1 is connected to a conductive copper bar 2, and the anode cylinder 1 is slidingly sleeved on the outside of the valve fixture; the valve fixture includes a valve seat 4 and a clamping mechanism 3 located above the valve seat 4. The valve seat 4 is a funnel-shaped structure, and two limit rods 401 are vertically provided on its outer wall, and the two limit rods 401 are symmetrically arranged; the clamping mechanism 3 includes a clamping block 301, and the clamping block 301 is provided with a slot 302 matching the valve seat 4 on the adjacent surface of the valve seat 4, and the side wall of the slot 302 is along the slot. A slide groove 305 matching the limit rod 401 is opened in the height direction of 302, and the side walls of the two slide grooves 305 have limit grooves 306 in the clockwise or counterclockwise direction. A positioning rod 303 is set through the bottom surface of the slot 302, and a pressure head 304 is provided at one end of the positioning rod 303 adjacent to the valve seat 4, and a limiting nut 307 is provided at the other end. A clamping spring 308 is also sleeved on the positioning rod 303, and one end of the clamping spring 308 rests on the pressure head 304, and the other end rests on the bottom surface of the slot 302. The top end of the positioning rod 303 is connected to a conductive bracket; the shielding sleeve 5 is sleeved on the tail end of the valve.

[0033] The valve seat 4 is used to clamp the valve. The valve seat 4 is a funnel-shaped structure. The valve head is passed through the valve seat 4 to clamp the valve inside the valve seat 4, and the shielding sleeve 5 is set on the tail end of the valve, thereby leaving the middle section of the valve that needs chrome plating to be left out for chrome plating. After the valve is clamped, the limiting rod 401 on the side wall of the valve seat 4 is aligned with the slide groove 305 on the side wall of the groove 302 on the clamping block 301, and then the limiting rod 401 is slid along the slide groove 305, thereby allowing the valve seat 4 to enter the groove 302, and then the valve seat 4 is rotated to allow the limiting rod 401 to slide into the limiting groove 3 06, thereby making the valve seat 4 clamped and fixed in the clamping groove 302, and at the same time, the positioning rod 303 is pressed against the head of the valve inside the valve seat 4 under the elastic force of the compression spring 308, thereby completing the clamping and fixing of the valve, and the top of the positioning rod 303 is connected to the conductive bracket, and the conductive electrode is directly connected to the cathode electricity, and the anode tube 1 is connected to the anode electricity through the conductive copper bus 2 on the side wall. The clamped valve is inserted into the anode tube 1 and then into the electroplating solution to complete the chrome plating of the valve. The valve clamping operation is simple and will not affect the safety of the workers' operation, thereby improving the chrome plating efficiency of the valve.

[0034] By adjusting the position of the limit nut 307, the length of the positioning rod 303 in the slot 302 can be adjusted, and the elastic force of the compression spring 308 can also be adjusted to meet the electroplating requirements of different signal valves.

[0035] A connecting rod 7 is vertically provided on the side of the clamping block 301 facing away from the valve seat 4 , and a mounting plate 6 is provided on the connecting rod 7 , and a mounting hole is opened on the mounting plate 6 .

[0036] A mounting plate 6 is provided on the side of the clamping block 301 through a connecting rod 7 , and the valve clamp can be fixed on an external pressing mechanism through the mounting plate 6 , so as to facilitate mechanized operation.

[0037] A clearance hole 8 is formed on the mounting plate 6 at a position corresponding to the positioning rod 303 .

[0038] By allowing the positioning rod 303 to pass through the positioning hole 8, the top end of the positioning rod 303 is prevented from abutting against the mounting plate 6, affecting the stability of the valve fixture installation position and affecting the normal operation of electroplating.

[0039] A positioning hole 402 for holding the valve is formed in the middle of the valve seat 4 , and the diameter of the top end of the positioning hole 402 is larger than the diameter of the bottom end.

[0040] The valve seat 4 is a funnel-shaped structure. Since the connection between the head of the valve seat 4 and the stem is arc-shaped, the diameter of the head of the valve seat 4 is larger than the diameter of the stem. The side wall of the positioning hole 402 is set to a slope, which makes it easier for the valve seat 4 to fit better with the valve. On the one hand, it improves the positioning effect of the valve seat 4 on the valve. On the other hand, it also improves the sealing effect between the valve seat 4 and the valve, preventing the electroplating liquid from entering the interior of the valve seat 4. The head of the valve seat 4 is also electroplated, which affects the product quality of the valve and causes waste of resources.

[0041] A plurality of sliding grooves 305 are staggeredly arranged on the side wall of the limiting groove 306 .

[0042] By setting multiple slide grooves 305, the depth of the valve seat 4 entering the clamping groove 302 on the clamping block 301 can be adjusted. The valve in the valve seat 4 exerts different extrusion forces on the pressure head 304 on the positioning rod 303, thereby making the positioning rod 303 have different pressing effects on the valve, meeting the electroplating operation needs of different types of valves.

[0043] The limiting groove 306 is arranged perpendicular to the sliding groove 305 .

[0044] It is convenient for the user to rotate the valve seat 4 and then slide the limiting rod 401 into the limiting groove 306 .

[0045] A through hole 101 is formed on the side wall of the anode cylinder 1 .

[0046] The through hole 101 facilitates the flow of the electroplating solution in the anode cylinder 1, thereby improving the fluidity of the electroplating solution, thereby improving the uniformity of the chrome plating of the valve and improving the quality of the valve product.

[0047] The shielding sleeve 5 includes a sleeve 501 . A ring plate 502 is provided on a side wall of one end of the sleeve 501 . A guide hole 503 is opened on the ring plate 502 .

[0048] The flow guide holes 503 facilitate the mutual flow of the electroplating solution in the anode cylinder 1 and the electroplating solution in the external electroplating tank, thereby improving the uniformity of the chromium plating of the valve.

[0049] The tail end of the valve does not need to be chrome-plated. The shielding sleeve 5 is put on the tail end of the valve to cover the tail end surface of the valve and separate it from the electroplating solution, so that chrome will not be plated on the surface of this part during electroplating. The sleeve 501 is convenient for connection with the valve, and the ring plate 502 on the side wall of the sleeve 501 improves the position stability of the valve in the anode cylinder 1 during electroplating, and also avoids contact between the valve and the inner wall of the sleeve 501, thereby ensuring the normal progress of electroplating.

[0050] When in use, the anode cylinder 1 is placed in the electroplating solution, the position of the anode cylinder 1 is fixed by the conductive copper bar 2, and it is electrically connected to the external anode, and the conductive bracket is installed on the external pressing mechanism. At the same time, the positioning rod 303 is electrically connected to the external cathode, and the position of the positioning rod 303 corresponds to the position of the anode cylinder 1. After the tail end of the valve passes through the positioning hole 402 of the valve seat 4, the shielding sleeve 5 is put on the tail end, and then the worker aligns the limiting rod 401 on the side wall of the valve seat 4 with the slide groove 305 on the side wall of the slot 302 on the clamping block 301. Insert the valve seat 4 into the slot 302. When it reaches the position of the limit slot 306, rotate the valve seat 4 so that the limit rod 401 rotates into the limit slot 306. At the same time, the pressure head 304 on the positioning rod 303 abuts against the valve head, thereby completing the clamping and fixing of the valve. Since the positioning rod 303 is energized by the cathode, the valve is energized by the cathode, and then the external downward pressure mechanism is started to insert the valve into the anode cylinder 1, and electroplating can be carried out. The entire hanger has a simple structure and is easy to operate. At the same time, it improves the safety of workers' operation and improves work efficiency.

[0051] In actual use, a sealing ring is set at the opening of the slot 302 on the clamping block 301 and the inner wall of the slot 302. The sealing ring improves the sealing between the valve seat 4 and the clamping block 301, prevents the electroplating liquid from entering the valve seat 4, affects the uniformity of the electroplating, and ensures the quality of the product.

[0052] Multiple anode cylinders 1 can be set on the conductive copper bus 2, and multiple positioning rods 303 can be set on the conductive bracket. The anode cylinders 1 and the positioning rods 303 correspond one to one, and multiple valves can be electroplated at the same time, further improving work efficiency.

[0053] The shielding sleeve 5 is made of fluororubber and has elasticity, ensuring that the shielding sleeve 5 can be sleeved on the tail end of the valve; the valve seat 4 is made of PP and has no conductivity, while also being able to support the valve.

[0054] Example 2:

[0055] like Figure 6 As shown, the limiting groove 306 is arranged to be tilted downward.

[0056] After the limiting rod 401 enters the slide groove 305, it needs to be rotated obliquely downward to slide the limiting rod 401 into the limiting groove 306, thereby improving the position stability of the limiting rod 401 in the limiting groove 306, and then improving the stability of the valve seat 4, thereby improving the position stability of the valve stuck in the valve seat 4, thereby improving the uniformity of the electroplating layer when the valve is electroplated, and improving the quality of the product.

[0057] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. The embodiments of the present utility model and the features of the embodiments can be combined with each other unless there is a conflict. Therefore, the scope of protection of the present utility model shall be based on the scope of protection of the claims.

Claims

1. A chrome-plated hanger for engine valve surface, characterized in that: The cam is provided with a plurality of spacers, and the spacers are connected with each other to form a plurality of spacers, and the spacers are connected with each other to form a plurality of spacers.

2. The chrome plating hanger for engine valve surface according to claim 1, characterized in that: A connecting rod is vertically arranged on the side of the clamping block facing away from the valve seat. A mounting plate is provided on the connecting rod, and a mounting hole is opened on the mounting plate.

3. The chrome plating hanger for engine valve surface according to claim 2, characterized in that: A clearance hole is provided on the mounting plate at a position corresponding to the positioning rod.

4. The chrome plating hanger for engine valve surface according to claim 1, characterized in that: A positioning hole for clamping the valve is opened in the middle of the valve seat, and the top diameter of the positioning hole is larger than the bottom diameter.

5. The chrome plating hanger for engine valve surface according to claim 1, characterized in that: The side walls of the limiting groove are staggeredly provided with a plurality of sliding grooves.

6. The chrome plating hanger for engine valve surface according to claim 5, characterized in that: The limiting groove is arranged perpendicular to the sliding groove.

7. The chrome plating hanger for engine valve surface according to claim 5, characterized in that: The limiting groove is arranged to be inclined downward.

8. The chrome plating hanger for engine valve surface according to claim 1, characterized in that: The side wall of the anode cylinder is provided with a through hole.

9. The chrome plating hanger for engine valve surface according to claim 1, characterized in that: The shielding sleeve comprises a sleeve, a side wall of one end of the sleeve is provided with a ring plate, and a guide hole is opened on the ring plate.

Images