An oil level gauge conduit and a forming apparatus therefor

Abstract

The application discloses an oil level gauge conduit and a forming equipment thereof, relates to the technical field of engine lubricating systems, and aims to solve the technical problem that traditional oil level gauge conduits are difficult to balance the sealing performance and the installation convenience, and comprises an oil level gauge conduit body, a mounting pipe and a sealing ring. The application improves the contact area with the oil pan opening by setting the sealing ring, thereby improving the sealing performance. Through the structural design of the mounting pipe, the nut is moved relative to the thread groove by rotating the wrench, the mounting pipe is inserted into the sealing ring, the support rod provides axial support for the sealing ring, the axial folding of the sealing ring is prevented, and when the mounting pipe is completely inserted into the sealing ring, the sealing ring is expanded and tightly contacts with the oil pan opening. The installation mode is more time-saving and labor-saving compared with the traditional direct hard insertion mode, and the technical problem that the traditional oil level gauge conduit is difficult to balance the sealing performance and the installation convenience is solved.

Description

Technical Field

[0001] This invention relates to the field of engine lubrication system technology, and more specifically, to an oil dipstick guide and its forming equipment. Background Technology

[0002] In the engine lubrication system, the oil dipstick guide is a key component for detecting engine oil level. One end connects to the engine oil pan, while the other end protrudes into the engine compartment. It guides the insertion and removal of the dipstick, ensuring the accuracy of oil level detection. The sealing performance between the guide and the oil pan is a core technical indicator. If the seal fails, oil leakage and the intrusion of external impurities will occur, not only causing oil loss but also accelerating the wear of internal engine parts, potentially leading to engine malfunction.

[0003] In the industry, sealing rings are commonly used as the core sealing component between the dipstick guide and the oil pan. Existing dipstick guide sealing rings are mostly standard annular rubber parts. During installation, the sealing ring must be manually inserted directly into the oil pan opening. The actual contact area between the sealing ring and the oil pan opening is small, approximately a line contact, resulting in limited sealing effect. Engine vibration during operation can cause tiny gaps between the sealing ring and the inner wall of the opening. Especially under high-temperature conditions, the rubber sealing ring is prone to aging and shrinkage, further aggravating gap leakage. This cannot meet the sealing requirements of long-term high-frequency vibration and high-temperature environment of the engine, often resulting in oil leakage. Although some improvement solutions increase the cross-sectional size of the sealing ring, they further increase the installation difficulty, creating a contradiction between sealing performance and installation convenience. In view of this, we propose a dipstick guide and its molding equipment. Summary of the Invention

[0004] The purpose of this invention is to provide an oil dipstick guide and its forming equipment to solve the technical problem that traditional oil dipstick guides are difficult to balance sealing performance and ease of installation.

[0005] To solve the above technical problems, the present invention provides the following technical solution: an oil dipstick guide tube, comprising an oil dipstick guide tube body, an installation tube, and a sealing ring; the installation tube is fixed to the head end of the oil dipstick guide tube body, a threaded groove is formed on the tail surface of the installation tube, a nut is threaded onto the threaded groove, a plurality of sliding strips are uniformly fixed on the head surface of the installation tube, a sleeve is fitted onto the installation tube, a plurality of sliding grooves are formed on the inner edge surface of the sleeve, the sliding grooves are slidably connected to the sliding strips, a ring block is fixed to the tail end of the sleeve, a guide chamfer is formed at the head end of the sleeve, a positioning ring is fixed to the head end of the installation tube, and an annular cavity is formed at the tail end of the positioning ring for insertion and mating with the sleeve; the sealing ring is fitted onto the installation tube and movably mats with the sleeve, four axial grooves are formed in a square structure on the sealing ring, a support rod is fixed on the axial grooves; the sealing ring has a flower-shaped structure; a plurality of grooves are formed in a linear, equally spaced structure on both sides of the support rod surface, the axial grooves are adapted to the shape of the support rod. This invention improves sealing performance by increasing the contact area between the sealing ring and the oil pan opening. Since inserting the sealing ring into the oil pan opening is relatively difficult, this invention utilizes a structural design of the mounting tube so that, initially, the sealing ring is located at the head of the positioning ring. The positioning ring and sealing ring are then inserted into the oil pan opening. Rotating the nut with a wrench moves the nut relative to the threaded groove, pushing the mounting tube into the sealing ring. To prevent axial folding of the sealing ring, a support rod provides axial support. When the mounting tube is fully inserted into the sealing ring, the sealing ring is stretched open and makes tight contact with the oil pan opening. This installation method, compared to the traditional direct insertion method, is more time-saving and labor-saving, solving the technical problem that traditional oil dipstick guides struggle to balance sealing performance and ease of installation. The sealing ring is designed with a flower-shaped structure, so that the outer perimeter of the sealing ring is initially smaller than that of the positioning ring, facilitating the insertion of both the positioning and sealing rings into the oil pan opening. When the sealing ring is supported within the sleeve, it forms a ring structure. This design increases the circumferential length of the sealing ring, reduces deformation during seal formation, avoids excessive stretching of the local sealing material, and reduces the accumulation of plastic fatigue, significantly extending the service life of a single sealing ring. Furthermore, several grooves are evenly spaced on both sides of the support rod surface to achieve the same effect, further solving the problem. This creates an uneven structure on the support rod surface, which, when combined with the axial groove of the sealing ring, effectively counteracts the axial force generated during installation, preventing the sealing ring from shifting axially relative to the support rod during installation.

[0006] A forming device for an oil dipstick guide tube, applicable to the processing of the aforementioned oil dipstick guide tube, includes an extruder, a die, a mandrel, and a rolling conveying mechanism; the die is fixed at the tail end of the extruder, the mandrel is fixed inside the die, the gap between the mandrel and the die forms an extrusion cavity adapted to the sealing ring, the mandrel has four sliding holes B in a square structure relative to the output end of the extrusion cavity, the rolling conveying mechanism is fixed at the head side of the extruder, the rolling conveying mechanism has four conveying channels, the four conveying channels are arranged in a square structure; the sliding holes B allow the support rod material to enter, realizing the integrated extrusion of the two.

[0007] Preferably, the screw of the extruder has a through hole at its center, the screw head of the extruder passes through the barrel of the extruder and communicates with the outside, a round block is fixed at the tail of the melting chamber of the extruder, a rotating groove is formed at the head of the round block, the rotating groove is rotatably connected to the tail of the screw of the extruder, a plurality of material holes are uniformly formed on the surface of the round block, and four sliding holes A are formed in a square structure on the rotating groove.

[0008] Preferably, the die is provided with a pre-storage groove, a flow groove, a pressure equalization groove, and a shaping groove in sequence along the material flow direction; the pre-storage groove includes a cylindrical groove and a main groove arranged in sequence along the material flow direction, the main groove having a structure that gradually expands along the material flow direction; the flow groove is connected to the main groove, the inner contour of the flow groove is a proportionally enlarged structure of the outer contour of the sealing ring, and the tail end contour of the main groove is consistent with the head end contour of the flow groove; the pressure equalization groove has a structure that gradually shrinks along the material flow direction;

[0009] The inner contour of the shaping groove is consistent with the outer contour of the sealing ring, and the tail end contour of the pressure equalizing groove is consistent with the inner contour of the shaping groove.

[0010] Preferably, the flow channel is provided with a flow divider core ring at the tail end, and an arc cavity is formed on the inner wall of the tail end of the flow channel. The arc cavity is an arc-shaped groove distributed along the circumference of the flow channel. The flow divider core ring includes a head ring and a tail ring. The head ring is located at the tail end of the flow channel and has a triangular cross-section. The head ring is fixedly connected to the tail end of the flow channel by a plurality of evenly arranged horizontal plates. The outer contour of the head ring is adapted to the inner contour of the flow channel. The tail ring is fixed at the tail end of the head ring and has a circular cross-section.

[0011] Preferably, the die tail sidewall is provided with a threaded cooling channel, and two through pipes A are fixed on the surface of the die tail. Both through pipes A pass through the die wall and are respectively connected to the two ends of the cooling channel.

[0012] Preferably, the core mold includes a conical block, a flow guide block, a pressure equalizing block, and a forming block arranged sequentially along the material flow direction; the conical block is disposed in the main groove, and the tail contour of the conical block is adapted to the tail contour of the main groove; the flow guide block includes a direct flow block and an oblique flow block arranged sequentially along the material flow direction, the direct flow block is disposed at the head of the flow channel, the direct flow block and the flow channel are fixedly connected by a plurality of uniformly arranged columns, the outer contour of the direct flow block is adapted to the inner contour of the flow channel, the oblique flow block has a structure that gradually shrinks along the material flow direction, and the inner contour of the head ring is adapted to the outer contour of the oblique flow block; the pressure equalizing block is disposed in the pressure equalizing groove, the pressure equalizing block has a structure that gradually expands along the material flow direction, and the head contour of the pressure equalizing block is consistent with the tail contour of the oblique flow block; the forming block is disposed in the shaping groove, the outer contour of the forming block is consistent with the inner contour of the sealing ring, and the tail contour of the pressure equalizing block is consistent with the outer contour of the forming block.

[0013] Preferably, the gap between the conical block, the main groove, and the cylindrical groove constitutes a pre-storage cavity; the gap between the DC block and the flow groove constitutes a DC cavity; the gap between the oblique flow block and the head ring constitutes a main flow cavity; the gap between the pressure equalizing block and the pressure equalizing groove constitutes a pressure equalizing cavity; the gap between the head ring and the flow groove constitutes a DC channel; the gap between the tail ring and the arc cavity constitutes an arc flow channel; the DC channel and the arc flow channel are connected to form a branch flow cavity; the gap between the forming block and the shaping groove constitutes a forming cavity; the extrusion film cavity is composed of the pre-storage cavity, the DC cavity, the main flow cavity, the branch flow cavity, the pressure equalizing cavity, and the forming cavity connected together.

[0014] Preferably, the DC block has an oil cavity A, and the oil cavity A has an oil hole A. One of the cylindrical eccentric ends protrudes from the die and has an oil hole B communicating with the oil hole A. The inclined flow block has an oil cavity B. The oil cavity A and the oil cavity B communicate to form a pressure equalization oil cavity. A piston unit is slidably mounted on the oil cavity B. A slide rail is provided at the end of the inclined flow block away from the oil cavity A. A pressure equalization slider adapted to the shape of the inclined flow block slides on the slide rail. The pressure equalization slider is fixedly connected to the piston unit.

[0015] Preferably, the rolling conveying mechanism includes a base, two vertical plates, a deceleration rotating assembly, and four rotating shafts. The base is fixed to the extruder head side. The two vertical plates are symmetrically fixed to the top of the base relative to the through hole position. The deceleration rotating assembly is disposed on one side of one of the vertical plates and fixedly connected to the base. The four rotating shafts are rotatably disposed in the gap between the two vertical plates in a linear and equally spaced structure. One of the rotating shafts passes through the corresponding vertical plate and is fixedly connected to the output end of the deceleration rotating assembly. The end of the rotating shaft away from the deceleration rotating assembly passes through the corresponding vertical plate and is fixedly provided with a gear. Any two adjacent gears mesh with each other. Two rollers are fixedly provided on the rotating shaft. Annular grooves are fixedly provided on the rollers. The four conveying channels are formed by the gaps between eight annular grooves. Several protrusions are fixedly provided in an annular and equally spaced structure on the annular grooves.

[0016] The beneficial effects of this invention are:

[0017] 1. This invention improves sealing performance by increasing the contact area between the sealing ring and the oil pan opening. Since inserting the sealing ring into the oil pan opening is difficult, this invention utilizes a structural design of the mounting tube to ensure that, in the initial state, [the sealing ring is inserted into the oil pan opening]. Figure 2 As shown, the sealing ring is located at the head end of the positioning ring. The positioning ring and the sealing ring are inserted into the oil pan opening. By rotating the nut with a wrench, the nut moves relative to the threaded groove, pushing the installation tube into the sealing ring. To prevent the sealing ring from axially folding, a support rod is used to provide axial support for the sealing ring. When the installation tube is fully inserted into the sealing ring, the sealing ring is opened and comes into close contact with the oil pan opening. This installation method is more time-saving and labor-saving than the traditional direct hard insertion method, and solves the technical problem that the traditional oil dipstick guide tube cannot balance sealing performance and installation convenience.

[0018] 2. The present invention also designs the sealing ring to have a flower-shaped structure, so that the outer periphery of the sealing ring in the initial state is smaller than that of the positioning ring, which facilitates the insertion of the positioning ring and the sealing ring into the oil pan opening. When the sealing ring is supported in the sleeve, it has an annular structure. This design increases the circumferential length of the sealing ring, reduces the deformation of the sealing ring when forming a seal, avoids excessive stretching of the local sealing material, and reduces the accumulation of plastic fatigue of the sealing ring, significantly extending the service life of a single sealing ring.

[0019] 3. The present invention also creates an uneven structure on the surface of the support rod by evenly opening several grooves on both sides of the support rod surface. This structure, when combined with the axial groove of the sealing ring, can effectively counteract the axial force generated during installation and prevent the sealing ring from shifting axially relative to the support rod during installation.

[0020] 4. This invention uses an extruder, die, and core die to extrude the sealing tube. The raw materials for the four support rods all pass through through holes and enter the extrusion cavity through four sliding holes A and B respectively. The rolling conveying mechanism controls the movement speed of the raw materials of the four support rods to be consistent with the extrusion speed of the sealing ring. Then, the sealing ring is cut by an external cutting mechanism to obtain a sealing component that integrates the support rods and the sealing ring.

[0021] 5. Through the design of the main flow chamber and the branch flow chamber, the two material flows achieve precise convergence at the head of the pressure equalization chamber. During the convergence process, the material flow in the branch flow chamber impacts the material flow in the main flow chamber, effectively reducing the overall flow velocity of the material flow and benefiting the filling of the pattern details of the sealing ring.

[0022] 6. This invention, through further design of the DC block and the inclined block, connects the oil hole B to the output end of the external hydraulic mechanism. By controlling the oil pressure stability of the equalizing oil chamber formed by the connection between oil chamber A and oil chamber B, when the material flow pressure increases, the pushing pressure of the material flow in the chamber is greater than the constant reverse pressure transmitted by the equalizing oil chamber. The pressure in the pre-stored chamber will act on the force-bearing surface of the equalizing slider, pushing the equalizing slider to slide along the slide rail towards oil chamber B, thereby driving the piston unit to compress hydraulic oil into the equalizing oil chamber, making the volume of the pre-stored chamber larger and reducing the pressure. When the material flow pressure decreases, the pushing pressure of the material flow in the pre-stored chamber is less than the constant reverse pressure transmitted by the equalizing oil chamber. At this time, the constant oil pressure in the equalizing oil chamber will push the piston unit to move away from oil chamber B, driving the equalizing slider to slide along the slide rail towards the pre-stored chamber, reducing the volume of the pre-stored chamber, thereby stabilizing the pressure in the pre-stored chamber and ensuring the stability of the material flow. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the oil dipstick guide tube after installation according to the present invention.

[0024] Figure 2 This is a schematic diagram of the oil dipstick guide tube before installation according to the present invention.

[0025] Figure 3 This is a cross-sectional structural diagram of the mounting tube of the present invention.

[0026] Figure 4 This is a schematic cross-sectional view of the sealing ring of the present invention.

[0027] Figure 5 This is a schematic diagram of the forming equipment for the oil dipstick guide tube of the present invention.

[0028] Figure 6 This is a partial structural schematic diagram of the forming equipment for the oil dipstick guide tube of the present invention.

[0029] Figure 7 This is a partial structural cross-sectional schematic diagram of the forming equipment for the oil dipstick guide tube of the present invention.

[0030] Figure 8 for Figure 7 An enlarged schematic diagram of the structure of part A.

[0031] Figure 9 This is a partial structural disassembly diagram of the forming equipment for the oil dipstick guide tube of the present invention.

[0032] Figure 10 for Figure 9 An enlarged schematic diagram of the structure of part B.

[0033] Figure 11 This is a partial structural schematic diagram of the rolling conveying mechanism of the present invention.

[0034] Figure 12 This is a cross-sectional structural diagram of the rolling conveying mechanism of the present invention.

[0035] Figure 13 This is a schematic diagram of the structure of the orifice and core mold of the present invention.

[0036] Figure 14 This is a cross-sectional structural diagram of the orifice and core mold of the present invention.

[0037] Figure 15 This is a cross-sectional structural diagram of the die of the present invention.

[0038] Figure 16 This is a schematic diagram of the core mold of the present invention.

[0039] Explanation of the labels in the diagram:

[0040] 1. Oil dipstick guide body; 2. Mounting pipe; 3. Sealing ring; 4. Extruder; 5. Die; 6. Core die; 7. Roller conveyor mechanism;

[0041] 21. Threaded groove; 22. Nut; 23. Sliding bar; 24. Sleeve; 25. Sliding groove; 26. Ring block; 27. Guide chamfer; 28. Locating ring; 29. ​​Ring cavity;

[0042] 31. Axial groove; 32. Support rod; 33. Groove;

[0043] 41. Through hole; 42. Round block; 43. Rotary groove; 44. Material hole; 45. Sliding hole A;

[0044] 51. Pre-storage tank; 52. Flow channel; 53. Pressure equalization tank; 54. Shaping tank; 55. Cooling channel; 56. Through pipe A; 57. Flow divider ring;

[0045] 521. Arc cavity;

[0046] 571. Head ring; 572. Tail ring; 573. Horizontal plate;

[0047] 60. Sliding hole B; 61. Conical block; 62. Flow guide block; 63. Pressure equalizing block; 64. Forming block;

[0048] 620. Column; 621. Oil cavity A; 622. Oil cavity B; 623. Piston unit; 624. Slide rail; 625. Pressure equalizing slider;

[0049] 71. Base; 72. Vertical plate; 73. Deceleration and rotation assembly; 74. Rotating shaft; 75. Gear; 76. Roller; 77. Annular groove; 78. Protrusion. Detailed Implementation

[0050] like Figures 1 to 16 As shown, the present invention relates to an oil dipstick guide tube, comprising an oil dipstick guide tube body 1, an installation tube 2, and a sealing ring 3.

[0051] In embodiments of the present invention, such as Figure 1 , Figure 2 ,and Figure 3 As shown, the mounting tube 2 is fixed to the head end of the dipstick guide body 1. The tail surface of the mounting tube 2 has a threaded groove 21, and a nut 22 is threaded onto the threaded groove 21. Several sliding strips 23 are evenly fixed to the head surface of the mounting tube 2. A sleeve 24 is fitted onto the mounting tube 2. Several sliding grooves 25 are opened on the inner edge surface of the sleeve 24. The sliding grooves 25 are slidably connected to the sliding strips 23. A ring block 26 is fixed to the tail end of the sleeve 24. A guide chamfer 27 is opened at the head end of the sleeve 24. A positioning ring 28 is fixed to the head end of the mounting tube 2. A ring cavity 29 is opened at the tail end of the positioning ring 28 to engage with the sleeve 24.

[0052] In embodiments of the present invention, such as Figure 1 , Figure 2 ,and Figure 4 As shown, the sealing ring 3 is sleeved on the mounting tube 2 and movably engages with the sleeve 24. The sealing ring 3 has four axial grooves 31 in a square structure, and a support rod 32 is fixedly mounted on each axial groove 31. This invention improves the sealing performance by increasing the contact area with the oil pan opening through the sealing ring 3. Since inserting the sealing ring 3 into the oil pan opening is relatively difficult, this invention, through the structural design of the mounting tube 2, ensures that in the initial state, as... Figure 2 The sealing ring 3 is located at the head end of the positioning ring 28. The positioning ring 28 and the sealing ring 3 are inserted into the oil pan opening. The nut 22 is rotated by a wrench, so that the nut 22 moves relative to the threaded groove 21, pushing the installation tube 2 into the sealing ring 3. To prevent the sealing ring 3 from axially folding, the support rod 32 provides axial support for the sealing ring 3. When the installation tube 2 is fully inserted into the sealing ring 3, the sealing ring 3 is stretched open and comes into close contact with the oil pan opening. This installation method is more time-saving and labor-saving than the traditional direct hard insertion method.

[0053] In embodiments of the present invention, such as Figure 4 As shown, the sealing ring 3 has a flower-shaped structure. Through the above-described design, the outer periphery of the sealing ring 3 in the initial state is smaller than that of the positioning ring 28, facilitating the insertion of the positioning ring 28 and the sealing ring 3 into the oil pan opening. When the sealing ring 3 is supported within the sleeve 24, it forms a ring structure. This design increases the circumferential length of the sealing ring 3, reduces the deformation of the sealing ring 3 when forming a seal, avoids excessive stretching of the local sealing material, and reduces the accumulation of plastic fatigue in the sealing ring 3, significantly extending the service life of a single sealing ring 3.

[0054] In embodiments of the present invention, such as Figure 4 As shown, the support rod 32 has several grooves 33 linearly and equally spaced on both sides of its surface, and the axial groove 31 is adapted to the shape of the support rod 32. When the rotating nut 22 pushes the mounting tube 2 into the sealing ring 3, the thrust of the mounting tube 2 easily causes the sealing ring 3 to have an axial displacement tendency. If the sealing ring 3 and the support rod 32 are only in a rigid planar fit, the axial limiting ability between them is weak and it is difficult to counteract this displacement tendency, which may lead to relative axial offset. The present invention provides grooves 33 on the surface of the support rod 32, so that the surface of the support rod 32 forms an uneven structure. When it fits with the axial groove 31 of the sealing ring 3, it can effectively counteract the axial force generated during installation and prevent the sealing ring 3 from axially offset relative to the support rod 32 during installation.

[0055] A forming device for an oil dipstick guide tube, suitable for processing the aforementioned oil dipstick guide tube, such as... Figure 5 , Figure 6 , Figure 7 ,and Figure 8 As shown, it includes an extruder 4, a die 5, a core die 6, and a rolling conveying mechanism 7.

[0056] In embodiments of the present invention, such as Figure 8 , Figure 9 ,and Figure 10 As shown, the extruder 4 has a through hole 41 at the center of the screw. The head end of the screw of the extruder 4 passes through the barrel of the extruder 4 and communicates with the outside. A circular block 42 is fixed at the tail of the melting chamber of the extruder 4. A rotating groove 43 is formed at the head end of the circular block 42. The rotating groove 43 is rotatably connected to the tail end of the screw of the extruder 4. A plurality of material holes 44 are evenly formed on the surface of the circular block 42. Four sliding holes A45 are formed in a square structure on the rotating groove 43. The structure of the extruder 4 of the present invention is prior art and will not be described in detail here. Figure 8 ,and Figure 9 Several material holes 44 are evenly opened on the circular block 42 relative to the gap between the barrel and the screw, and four sliding holes A45 are used to pass the raw material through the support rod 32.

[0057] In embodiments of the present invention, such as Figure 5 , Figure 13 , Figure 14 ,and Figure 15 As shown, the die 5 is fixed to the tail end of the extruder 4. The die 5 has a pre-storage groove 51, a flow groove 52, a pressure equalization groove 53, and a shaping groove 54 sequentially formed along the material flow direction. A flow divider ring 57 is provided at the tail end of the flow groove 52. A threaded cooling channel 55 is formed on the tail side wall of the die 5. Two through-pipes A56 are fixed to the surface of the tail end of the die 5. Both through-pipes A56 penetrate the wall of the die 5 and are respectively connected to both ends of the cooling channel 55. The two through-pipes A56 of this invention are respectively connected to the input end and the output end of an external cooling mechanism. Figure 4 ,and Figure 15 It can be seen that the cooling channel 55 is located in the middle of the pressure equalization groove 53 and the shaping groove 54, and is used for cooling the sealing ring 3.

[0058] In embodiments of the present invention, such as Figure 14 ,and Figure 15 As shown, the pre-storage slot 51 includes a cylindrical slot and a main slot. The cylindrical slot is opened at the head end of the die 5, and the main slot is connected to the tail end of the die 5. The main slot has a structure that gradually expands along the material flow direction.

[0059] In embodiments of the present invention, such as Figure 14 ,and Figure 15 The flow channel 52 is connected to the main channel. The inner contour of the flow channel 52 is a proportionally enlarged structure of the outer contour of the sealing ring 3. The tail end contour of the main channel is consistent with the head end contour of the flow channel 52. An arc cavity 521 is opened on the inner wall of the tail end of the flow channel 52. The arc cavity 521 is an arc-shaped groove 33 distributed along the circumference of the flow channel 52.

[0060] In embodiments of the present invention, such as Figure 14 ,and Figure 15 As shown, the pressure equalization tank 53 is connected to the flow channel 52, and the pressure equalization tank 53 has a structure that gradually decreases in size along the material flow direction;

[0061] In embodiments of the present invention, such as Figure 14 ,and Figure 15 As shown, the shaping groove 54 is connected to the pressure equalizing groove 53. The inner contour of the shaping groove 54 is consistent with the outer contour of the sealing ring 3, and the tail end contour of the pressure equalizing groove 53 is consistent with the inner contour of the shaping groove 54.

[0062] In embodiments of the present invention, such as Figure 14 ,and Figure 15As shown, the flow divider core ring 57 includes a head ring 571 and a tail ring 572. The head ring 571 is located at the tail of the flow channel 52. The head ring 571 has a triangular cross-section. The head ring 571 is fixedly connected to the tail of the flow channel 52 by a plurality of evenly arranged horizontal plates 573. The outer contour of the head ring 571 is adapted to the inner contour of the flow channel 52. The gap between the head ring 571 and the flow channel 52 forms a direct current channel. The tail ring 572 is fixed at the tail end of the head ring 571. The tail ring 572 has a circular cross-section. The gap between the tail ring 572 and the arc cavity 521 forms an arc flow channel. The direct current channel and the arc flow channel are connected to form a branch flow cavity.

[0063] In embodiments of the present invention, such as Figure 13 ,and Figure 16 As shown, the core mold 6 is fixed inside the die 5. The gap between the core mold 6 and the die 5 forms an extrusion cavity adapted to the sealing ring 3. The core mold 6 has four sliding holes B60 in a square structure relative to the output end of the extrusion cavity. This invention uses an extruder 4, a die 5, and a core mold 6 to extrude a sealing tube. The raw materials for the four support rods 32 all pass through the through hole 41 and enter the extrusion cavity through the four sliding holes A45 and B60 respectively. The rolling conveying mechanism 7 controls the movement speed of the raw materials of the four support rods 32 to be consistent with the extrusion speed of the sealing ring 3. Then, the sealing ring 3 is cut by an external cutting mechanism to obtain a sealing component that integrates the support rods 32 and the sealing ring 3.

[0064] In embodiments of the present invention, such as Figure 14 As shown, and Figure 16 The core mold 6 includes a conical block 61, a flow guide block 62, a pressure equalizing block 63, and a forming block 64 arranged sequentially along the material flow direction.

[0065] In embodiments of the present invention, such as Figure 14 As shown, the conical block 61 is disposed in the main groove, and the tail end contour of the conical block 61 is adapted to the tail end contour of the main groove. The gap between the conical block 61, the main groove, and the cylindrical groove forms a pre-storage cavity.

[0066] In embodiments of the present invention, such as Figure 14 As shown, the flow guide block 62 includes a direct flow block and an oblique flow block. The direct flow block is disposed at the head of the flow channel 52 and is fixedly connected to the conical block 61. The direct flow block and the flow channel 52 are fixedly connected by a plurality of uniformly arranged columns 620. The outer contour of the direct flow block is adapted to the inner contour of the flow channel 52. The gap between the direct flow block and the flow channel 52 forms a direct flow cavity. The oblique flow block is fixed at the tail end of the direct flow block. The oblique flow block has a structure that gradually shrinks along the material flow direction. The inner contour of the head ring 571 is adapted to the outer contour of the oblique flow block. The gap between the oblique flow block and the head ring 571 forms a main flow cavity.

[0067] In embodiments of the present invention, such as Figure 14 As shown, the pressure equalization block 63 is disposed in the pressure equalization groove 53 and is fixedly connected to the inclined flow block. The pressure equalization block 63 has a structure that gradually expands along the material flow direction. The outline of the head end of the pressure equalization block 63 is consistent with the outline of the tail end of the inclined flow block. The gap between the pressure equalization block 63 and the pressure equalization groove 53 forms a pressure equalization cavity.

[0068] In embodiments of the present invention, such as Figure 14 As shown, the forming block 64 is disposed in the shaping groove 54 and fixedly connected to the pressure equalizing block 63. The outer contour of the forming block 64 is consistent with the inner contour of the sealing ring 3, and the tail end contour of the pressure equalizing block 63 is consistent with the outer contour of the forming block 64. The gap between the forming block 64 and the shaping groove 54 forms a forming cavity. The extrusion film cavity is composed of a pre-storage cavity, a direct current cavity, a main current cavity, a branch current cavity, a pressure equalizing cavity, and a forming cavity connected together. This invention, through further design of the die 5 and the core die 6, allows the molten material conveyed by the extruder 4 to enter the pre-storage cavity formed by the gap between the pre-storage groove 51 and the conical block 61 for initial convergence. Subsequently, the molten material in the pre-storage cavity enters the direct flow cavity formed by the gap between the flow channel 52 and the direct flow block, achieving initial rectification of the material flow and ensuring that the molten material flow is uniformly advanced along the basic contour of the sealing ring 3. After rectification in the direct flow cavity, the material flow is further divided, with one part entering the main flow cavity formed by the gap between the inclined flow block and the head ring 571, and the other part entering the branch flow cavity formed by the connection between the direct flow channel and the arc flow channel. The two material flows achieve precise convergence at the head of the pressure equalization cavity. During the convergence process, the material flow in the branch cavity impacts the material flow in the main cavity, effectively reducing the overall flow velocity and facilitating the filling of the floral details of the sealing ring 3. After convergence and deceleration, the material flow enters the equalization cavity formed by the gap between the equalization groove 53 and the equalization block 63. The material flow gradually cools and shrinks in the equalization cavity before entering the forming cavity formed by the gap between the shaping groove 54 and the forming block 64. The inner and outer contours of the forming cavity are perfectly matched with the inner and outer contours of the sealing ring 3, respectively. After final shaping, it is stably extruded to obtain the tubular sealing ring 3. At the same time, the raw material of the support rod 32 enters the forming cavity simultaneously, realizing the integrated molding with the sealing ring 3.

[0069] In embodiments of the present invention, such as Figure 14As shown, the DC block has an oil cavity A621, and the oil cavity A621 has an oil hole A. One of the cylindrical bodies 620 has an eccentric end that passes through the die 5 and has an oil hole B that communicates with the oil hole A. The inclined flow block has an oil cavity B622. The oil cavity A621 and the oil cavity B622 communicate to form a pressure equalization oil cavity. A piston unit 623 is slidably mounted on the oil cavity B622. A slide rail 624 is provided at the end of the inclined flow block away from the oil cavity A621. A pressure equalization slider 625 that is adapted to the shape of the inclined flow block slides on the slide rail 624. The pressure equalization slider 625 is fixedly connected to the piston unit 623. This invention, through further design of the DC block and the inclined block, connects the oil hole B to the output end of the external hydraulic mechanism. By controlling the oil pressure stability of the equalizing oil chamber formed by the connection of oil chamber A621 and oil chamber B622, when the material flow pressure increases, the pushing pressure of the material flow in the chamber is greater than the constant reverse pressure transmitted by the equalizing oil chamber. The pressure in the pre-stored chamber will act on the force-bearing surface of the equalizing slider 625, pushing the equalizing slider 625 to slide along the slide rail 624 towards the oil chamber B622, thereby driving the piston unit 623 to compress the hydraulic oil into the equalizing oil chamber, making the volume of the pre-stored chamber larger and reducing the pressure. When the material flow pressure decreases, the pushing pressure of the material flow in the pre-stored chamber is less than the constant reverse pressure transmitted by the equalizing oil chamber. At this time, the constant oil pressure in the equalizing oil chamber will push the piston unit 623 to move away from the oil chamber B622, driving the equalizing slider 625 to slide along the slide rail 624 towards the pre-stored chamber, reducing the volume of the pre-stored chamber, thereby stabilizing the pressure in the pre-stored chamber and ensuring the stability of the material flow.

[0070] In embodiments of the present invention, such as Figure 5 , Figure 7 , Figure 11 ,as well as Figure 12As shown, the rolling conveying mechanism 7 is fixedly mounted on the head side of the extruder 4. The rolling conveying mechanism 7 includes a base 71, two vertical plates 72, a reduction and rotation assembly 73, and four rotating shafts 74. The base 71 is fixedly mounted on the head side of the extruder 4. The two vertical plates 72 are symmetrically mounted on the top of the base 71 relative to the through hole 41. The reduction and rotation assembly 73 is located on one side of one of the vertical plates 72 and fixedly connected to the base 71. The four rotating shafts 74 are linearly and equally spaced and rotate in the gap between the two vertical plates 72. A rotating shaft 74 extends through the corresponding vertical plate 72 and is fixedly connected to the output end of the deceleration rotating assembly 73. The end of the rotating shaft 74 away from the deceleration rotating assembly 73 extends through the corresponding vertical plate 72 and is fixedly fitted with a gear 75. Any two adjacent gears 75 mesh with each other. Two rollers 76 are fixedly mounted on the rotating shaft 74. Annular grooves 77 are fixedly mounted on the rollers 76. Several protrusions 78 are fixedly mounted on the annular grooves 77 in an evenly spaced ring structure. The eight annular grooves 77 form four conveying channels, which are arranged in a square structure. Through the above-described configuration, the present invention enables... Figure 11 and Figure 12 The four conveying channels have the same conveying direction and speed, and are used to convey the raw materials of the four support rods 32. During the conveying process, the protrusions 78 press out a number of grooves 33 with a linear and equidistant structure at both ends of the raw material surface of the support rods 32.

[0071] Working principle: This embodiment provides an oil dipstick guide and its forming equipment. When the oil dipstick guide is used, since the sealing ring 3 has a flower-shaped structure, its initial outer dimension is smaller than that of the positioning ring 28. The positioning ring 28 and the sealing ring 3 can be easily inserted into the oil pan opening to complete the initial positioning, thus solving the problem of the traditional sealing ring 3 being difficult to insert.

[0072] Using a wrench, rotate the nut 22 on the threaded groove 21 at the tail of the installation tube 2. The nut 22 moves axially along the threaded groove 21 and pushes the installation tube 2 into the sealing ring 3. During this process, the groove 33 on the surface of the support rod 32 and the axial groove 31 form a concave-convex fit, which can counteract the axial force generated when the installation tube 2 is inserted, preventing the sealing ring 3 from shifting or folding relative to the support rod 32. As the installation tube 2 continues to be inserted, the flower-shaped sealing ring 3 is gradually stretched open, and finally forms a ring structure that fits tightly against the inner wall of the oil pan opening. The flower-shaped structure increases the circumferential length of the sealing ring 3, reduces the degree of sealing deformation, reduces plastic fatigue, and achieves efficient sealing while extending service life. When the installation tube 2 is fully inserted into the sealing ring 3 and the head of the sleeve 24 is inserted into the annular cavity 29 of the positioning ring 28, stop rotating the nut 22. At this time, the installation tube 2, the sleeve 24 and the positioning ring 28 form a stable assembly structure, and the oil dipstick guide is fixed to the oil pan, which can realize the normal insertion and removal of the oil dipstick and the detection of the oil level.

[0073] When the oil dipstick guide forming equipment is in use, the extruder 4 pushes the molten sealing ring 3 raw material to the tail of the barrel. The raw material first enters the pre-storage tank 51 through the material hole 44 on the round block 42 to complete the initial convergence. When the material flow pressure increases, the material flow pushes the pressure equalization slider 625 to expand the volume of the pre-storage chamber to reduce the pressure. When the material flow pressure decreases, the constant oil pressure of the pressure equalization oil chamber pushes the piston unit 623 and the pressure equalization slider 625 to move in opposite directions, reducing the volume of the pre-storage chamber to increase the pressure, thereby achieving dynamic stability of the material flow pressure. Subsequently, the molten material in the pre-storage chamber enters the DC chamber formed by the gap between the flow channel 52 and the DC block to achieve the initial rectification of the material flow, so that the molten material flow is uniformly advanced along the basic contour of the sealing ring 3. After rectification in the DC chamber, The material flow is further divided. One part enters the main flow chamber formed by the gap between the inclined flow block and the head ring 571, and the other part enters the branch flow chamber formed by the connection between the direct flow channel and the arc flow channel. The two material flows are precisely converged at the head of the pressure equalization chamber. During the convergence process, the material flow in the branch flow chamber impacts the material flow in the main flow chamber, effectively reducing the overall flow velocity of the material flow, which is beneficial to the filling of the flower details of the sealing ring 3. After the material flow is converged and decelerated, it enters the pressure equalization chamber formed by the gap between the pressure equalization groove 53 and the pressure equalization block 63. After the material flow is gradually cooled and shrunk in the pressure equalization chamber, it enters the forming chamber formed by the gap between the shaping groove 54 and the forming block 64. The inner and outer contours of the forming chamber are completely matched with the inner and outer contours of the sealing ring 3, respectively. Finally, after shaping, it is stably extruded.

[0074] Meanwhile, the four rotating shafts 74 of the rolling conveying mechanism 7 rotate synchronously through the meshing of gears 75. The four square conveying channels, during the conveying process, the protrusions 78 on the annular grooves 77 press out grooves 33 on the raw material surface of the support rods 32, and the conveying speed is consistent with the extrusion speed of the raw material of the sealing rings 3. The raw material of the four support rods 32 passes through the through holes 41, and then enters the forming cavity through the four sliding holes A45 and sliding holes B60 of the round block 42, and combines with the molten sealing ring 3 material flow. After cooling, the two are integrated into a single molding process. Finally, the composite part of a single sealing ring 3 and support rod 32 is obtained by cutting by an external cutting mechanism.

[0075] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. An oil dipstick guide tube, characterized in that, Includes the oil dipstick guide body (1), the mounting tube (2), and the sealing ring (3); The mounting tube (2) is fixed to the head end of the dipstick guide body (1). The tail surface of the mounting tube (2) is provided with a threaded groove (21). A nut (22) is threaded onto the threaded groove (21). Several sliding strips (23) are uniformly fixed to the head surface of the mounting tube (2). A sleeve (24) is fitted onto the mounting tube (2). Several sliding grooves (25) are provided on the inner edge surface of the sleeve (24). The sliding grooves (25) are slidably connected to the sliding strips (23). A ring block (26) is fixed to the tail end of the sleeve (24). A guide chamfer (27) is provided at the head end of the sleeve (24). A positioning ring (28) is fixed to the head end of the mounting tube (2). A ring cavity (29) is provided at the tail end of the positioning ring (28) to be inserted into and cooperate with the sleeve (24). The sealing ring (3) is sleeved on the mounting tube (2) and is movably engaged with the sleeve (24). The sealing ring (3) has four axial grooves (31) in a square structure, and a support rod (32) is fixed on the axial grooves (31). In the initial state, the sealing ring (3) is located at the head end of the positioning ring (28). The positioning ring (28) and the sealing ring (3) are inserted into the oil pan opening. The nut (22) is rotated by a wrench, so that the nut (22) moves relative to the thread groove (21), pushing the sleeve (24) to insert into the sealing ring (3). When the sleeve (24) is fully inserted into the sealing ring (3), the sealing ring (3) is opened and comes into close contact with the oil pan opening. The sealing ring (3) has a flower-shaped structure; The support rod (32) has several grooves (33) on both sides of its surface in a linear and equally spaced structure. The axial groove (31) is adapted to the shape of the support rod (32).

2. A forming device for an oil dipstick guide tube, applicable to the processing of the oil dipstick guide tube as described in claim 1, characterized in that, It includes an extruder (4), a die (5), a core die (6), and a rolling conveyor mechanism (7); The die (5) is fixed at the tail end of the extruder (4), the core die (6) is fixed inside the die (5), the gap between the core die (6) and the die (5) forms an extrusion cavity that is adapted to the sealing ring (3), the core die (6) has four sliding holes B (60) in a square structure relative to the output end of the extrusion cavity, the rolling conveying mechanism (7) is fixed at the head side of the extruder (4), the rolling conveying mechanism (7) has four conveying channels, and the four conveying channels are arranged in a square structure; The sliding hole B (60) allows the raw material of the support rod (32) to enter, realizing the integrated extrusion of the two.

3. The forming equipment for the oil dipstick guide tube according to claim 2, characterized in that, The extruder (4) has a through hole (41) at the center of the screw. The screw head of the extruder (4) passes through the barrel of the extruder (4) and communicates with the outside. A round block (42) is fixed at the tail of the melting chamber of the extruder (4). A rotating groove (43) is opened at the head of the round block (42). The rotating groove (43) is rotatably connected to the tail of the screw of the extruder (4). A number of material holes (44) are evenly opened on the surface of the round block (42). Four sliding holes A (45) are opened in a square structure on the rotating groove (43).

4. The forming equipment for the oil dipstick guide tube according to claim 3, characterized in that, The die (5) is provided with a pre-storage groove (51), a flow groove (52), a pressure equalization groove (53), and a shaping groove (54) in sequence along the material flow direction; The pre-storage tank (51) includes columnar tanks arranged sequentially along the material flow direction and a main tank, wherein the main tank has a structure that gradually expands along the material flow direction; The flow channel (52) is connected to the main channel. The inner contour of the flow channel (52) is a proportionally enlarged structure of the outer contour of the sealing ring (3). The tail end contour of the main channel is consistent with the head end contour of the flow channel (52). The equalizing tank (53) has a gradually decreasing size structure along the material flow direction; The inner contour of the shaping groove (54) is consistent with the outer contour of the sealing ring (3), and the tail end contour of the pressure equalizing groove (53) is consistent with the inner contour of the shaping groove (54).

5. The forming equipment for the oil dipstick guide tube according to claim 4, characterized in that, The flow channel (52) is provided with a flow divider core ring (57) at its tail end. An arc cavity (521) is opened on the inner wall of the tail end of the flow channel (52). The arc cavity (521) is an arc-shaped groove (33) distributed along the circumference of the flow channel (52). The flow divider core ring (57) includes a head ring (571) and a tail ring (572). The head ring (571) is located at the tail end of the flow channel (52). The head ring (571) has a triangular cross section. The head ring (571) is fixedly connected to the tail end of the flow channel (52) by several evenly arranged horizontal plates (573). The outer contour of the head ring (571) is adapted to the inner contour of the flow channel (52). The tail ring (572) is fixed at the tail end of the head ring (571). The tail ring (572) has a circular cross section.

6. The forming equipment for the oil dipstick guide tube according to claim 5, characterized in that, The tail side wall of the die (5) is provided with a threaded cooling channel (55), and two through pipes A (56) are fixed on the tail surface of the die (5). The two through pipes A (56) are inserted into the wall of the die (5) and connected to the two ends of the cooling channel (55) respectively.

7. The forming equipment for the oil dipstick guide tube according to claim 6, characterized in that, The core mold (6) includes a conical block (61), a flow guide block (62), a pressure equalizing block (63), and a forming block (64) arranged sequentially along the material flow direction. The conical block (61) is disposed in the main groove, and the tail end contour of the conical block (61) is adapted to the tail end contour of the main groove; The guide block (62) includes a direct flow block and an inclined flow block arranged sequentially along the material flow direction. The direct flow block is located at the head of the flow channel (52). The direct flow block and the flow channel (52) are fixedly connected by a plurality of uniformly arranged columns (620). The outer contour of the direct flow block is adapted to the inner contour of the flow channel (52). The inclined flow block has a structure that gradually shrinks along the material flow direction. The inner contour of the head ring (571) is adapted to the outer contour of the inclined flow block. The pressure equalization block (63) is disposed in the pressure equalization tank (53). The pressure equalization block (63) has a structure that gradually expands along the material flow direction. The outline of the head end of the pressure equalization block (63) is consistent with the outline of the tail end of the inclined flow block. The molding block (64) is located in the shaping groove (54). The outer contour of the molding block (64) is consistent with the inner contour of the sealing ring (3), and the tail end contour of the pressure equalizing block (63) is consistent with the outer contour of the molding block (64).

8. The forming equipment for the oil dipstick guide tube according to claim 7, characterized in that, The conical block (61), the main groove, and the gap between the cylindrical groove form a pre-storage cavity; The gap between the DC block and the flow channel (52) forms a DC cavity; The gap between the oblique flow block and the head ring (571) forms the main flow cavity; The gap between the equalizing block (63) and the equalizing groove (53) forms an equalizing cavity; The gap between the head ring (571) and the flow groove (52) forms a direct current channel, and the gap between the tail ring (572) and the arc cavity (521) forms an arc flow channel. The direct current channel and the arc flow channel are connected to form a branch flow cavity. The gap between the molding block (64) and the shaping groove (54) forms a molding cavity; The extrusion film cavity is composed of a pre-storage cavity, a direct current cavity, a main current cavity, a branch current cavity, a pressure equalization cavity, and a forming cavity connected together.

9. The forming equipment for the oil dipstick guide tube according to claim 8, characterized in that, The DC block has an oil cavity A (621) and an oil hole A. One of the cylinders (620) has an eccentric end that passes through the die (5) and has an oil hole B that communicates with the oil hole A. The inclined flow block has an oil cavity B (622). The oil cavity A (621) and the oil cavity B (622) communicate to form a pressure equalization oil cavity. A piston unit (623) is slidably provided on the oil cavity B (622). A slide rail (624) is provided at the end of the inclined flow block away from the oil cavity A (621). A pressure equalization slider (625) that matches the shape of the inclined flow block slides on the slide rail (624). The pressure equalization slider (625) is fixedly connected to the piston unit (623).

10. The forming equipment for the oil dipstick guide tube according to claim 9, characterized in that, The rolling conveying mechanism (7) includes a base (71), two vertical plates (72), a deceleration rotating assembly (73), and four rotating shafts (74). The base (71) is fixed to the head side of the extruder (4). The two vertical plates (72) are symmetrically positioned relative to the through hole (41) and fixed to the top of the base (71). The deceleration rotating assembly (73) is located on one side of one of the vertical plates (72) and fixedly connected to the base (71). The four rotating shafts (74) are arranged in a linear, equidistant structure and rotate in the gap between the two vertical plates (72). One of the rotating shafts... The rotating shaft (74) passes through the corresponding vertical plate (72) and is fixedly connected to the output end of the deceleration rotating assembly (73). The end of the rotating shaft (74) away from the deceleration rotating assembly (73) passes through the corresponding vertical plate (72) and is fixedly provided with a gear (75). Any two adjacent gears (75) are meshed and connected. Two rollers (76) are fixedly provided on the rotating shaft (74). Annular grooves (77) are fixedly provided on the rollers (76). The four conveying channels are formed by the gaps between eight annular grooves (77). Several protrusions (78) are fixedly provided on the annular grooves (77) in an annular and equally spaced structure.

Images