A magnetic bar holder, strainer and torque converter lubrication system

Abstract

The application discloses a magnetic rod support, a coarse filter and a lubricating system of a hydraulic transmission, and belongs to the technical field of vehicle transmission systems. The magnetic rod support is used for supporting a magnetic rod in the coarse filter and comprises a support body, a center hole is arranged in the center of the support body, a plurality of radially extending support plates are arranged on the peripheral surface of the support body, all the ends of the support plates are bent in the same direction to form bent plates, and an included angle of 3-5 degrees exists between the bent plates and the central axis of the support body. The coarse filter comprises the magnetic rod support, a cylindrical filter screen, a mounting plate, a circular ring body, a magnetic rod and a connecting piece. One end of the magnetic rod is connected with the mounting plate, and the other end of the magnetic rod is connected with the magnetic rod support through the connecting piece; the magnetic rod support is arranged in the circular ring body, and the outer surface of the bent plate of the magnetic rod support is tightly attached to the inner wall of the circular ring body. The application forms stable support for the free end of the magnetic rod through the magnetic rod support, prevents the free end of the magnetic rod from being inclined under the impact of oil, optimizes the oil flow channel, reduces pressure loss, and improves the stability and reliability of the lubricating system.

Description

Technical Field

[0001] This invention relates to the field of vehicle transmission system technology, and in particular to a magnetic rod holder for supporting a magnetic rod inside a coarse filter. The invention also relates to a coarse filter including the magnetic rod holder and a hydraulic transmission lubrication system employing the coarse filter. Background Technology

[0002] Hydraulic transmissions are core components of vehicle and heavy machinery transmission systems, and their reliability is closely related to the stable oil supply of the lubrication system. In the lubrication circuit, the coarse filter is one of the key filtration components. It not only adsorbs ferromagnetic metal particles (such as iron filings) in the oil but also guides the oil flow, protecting downstream precision components and ensuring the operational stability and service life of the entire transmission system.

[0003] Currently, the coarse filters commonly used in oil circuits are those with magnetic rods. For example, patent CN209204828U discloses a pipeline magnetic rod filter device. Its specific structure includes a main body, within which a filter chamber is formed. A sealing cap, detachably connected to the main body, is provided at the opening of the filter chamber. A filter screen is installed inside the filter chamber, and magnetic rods are embedded within the filter screen. This device can perform dual filtration of scale and rust in the pipeline.

[0004] However, in practical applications, especially in the high-pressure, high-flow-rate lubrication circuits of hydraulic transmissions, the aforementioned existing technology has certain limitations. Specifically, one end of the magnetic rod is fixed to the sealing cap, while the other end is free, forming a cantilevered structure installed inside the filter chamber. Under long-term, continuous high-speed oil impact, the root of this cantilevered magnetic rod is prone to large alternating stress, leading to tilting or even fatigue fracture. When the magnetic rod tilts, it may touch and potentially damage the filter screen. Furthermore, the gap between the magnetic rod and the filter screen becomes uneven, reducing the efficiency of adsorbing iron filings. In severe cases, fragments of the magnetic rod may even detach and enter downstream with the oil, causing serious damage to precision components such as the hydraulic torque converter, thus affecting the stability and reliability of the entire lubrication system. Summary of the Invention

[0005] The technical problem this invention aims to solve is to address the shortcomings of existing coarse filters with magnetic rods, where the magnetic rods are cantilevered and prone to tilting under oil impact, thus affecting filtration efficiency and system reliability. This invention provides a magnetic rod support that effectively supports the free end of the magnetic rod and prevents it from tilting. This invention also provides a coarse filter including this magnetic rod support and a hydraulic transmission lubrication system using this coarse filter.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0007] First, this invention provides a magnetic rod support for supporting magnetic rods within a coarse filter. The magnetic rod support includes a support body. A central hole is provided at the center of the support body for fixing it to the end of the magnetic rod via a connector. A plurality of radially extending support plates are evenly distributed in a ring around the circumference of the support body. The ends of all support plates furthest from the support body are bent in the same direction, forming bent plates. An angle α exists between the bent plates and the central axis of the magnetic rod support, the angle α ranging from 3° to 5°.

[0008] Preferably, the included angle α is 3.5°. This angle design ensures that during installation, the bending plate can generate a pre-tightening force with the inner wall of the mating component (such as the annulus) of the coarse filter, achieving stable support.

[0009] Preferably, both the inner and outer surfaces of the bent plate are constructed as arc surfaces.

[0010] Preferably, the bend between the bending plate and the support plate is provided with a transition fillet. Further, the outer diameter of the transition fillet is R5. This transition fillet serves as an assembly guide, facilitating the smooth insertion of the magnetic rod support into the mating components.

[0011] Preferably, the number of support plates is three, and the included angle between any two adjacent support plates is 120 degrees. This three-support plate structure, while ensuring structural strength and support stability, can maximize the oil flow area and reduce flow resistance.

[0012] Preferably, the magnetic rod support adopts an integral structure formed by stamping and then bending a plate. This manufacturing method is simple, efficient, low-cost, and produces good consistency.

[0013] Secondly, the present invention also provides a coarse filter, which includes a magnetic rod support as described above. Specifically, the coarse filter further includes: A cylindrical filter screen, with the entire structure open at both ends; A mounting plate is disposed at one end of the cylindrical filter screen for mounting and fixing the coarse filter; A circular ring is disposed at the other end of the cylindrical filter screen; A magnetic rod is installed inside the cylindrical filter screen, with one end connected to the mounting plate; A connector for fixing the other end of the magnetic rod to the support body of the magnetic rod holder.

[0014] The magnetic rod support is disposed inside the annular body, with the outer surface of its bent plates tightly against the inner wall of the annular body. Since the bent plates have an angle α with the central axis in their free state, during the process of connecting and tightening the magnetic rod via the connector, the magnetic rod support gradually enters the annular body. The bent plates undergo elastic deformation, and ultimately, the outer surface of the bent plates presses tightly against the inner wall of the annular body, generating a certain radial preload. This ensures reliable positioning and fixation of the magnetic rod support within the annular body and provides stable support for the free end of the magnetic rod. After the magnetic rod support is installed in the annular body, all the bent plates retract, and the outer surfaces of all the bent plates lie on the same cylindrical surface. This ensures uniform contact and good coaxiality between the magnetic rod support and the annular body.

[0015] Specifically, the cylindrical filter screen is welded to the mounting plate, which is a circular plate with multiple mounting holes evenly distributed in a ring on it. The connector can be a screw, which passes through the central hole on the support body and is then screwed into the threaded hole on the end face of the magnetic rod.

[0016] Preferably, the cylindrical filter screen is further provided with a plurality of reinforcing rings inside. The plurality of reinforcing rings are evenly distributed and spaced apart along the axial direction of the cylindrical filter screen to enhance the radial strength of the cylindrical filter screen and prevent it from deforming under oil pressure.

[0017] Furthermore, the notch formed between two adjacent support plates, together with the inner wall of the annulus, forms an oil guiding channel. Oil enters the interior of the cylindrical filter screen through this channel. The width of each support plate is H. By selecting magnetic rod supports of different specifications (i.e., different widths H) installed within the annulus, the flow area of ​​the oil guiding channel can be adjusted. Specifically, when a support plate with a narrower width H is used, the flow area of ​​the oil guiding channel is larger. Increased flow area reduces dead zones, allowing oil to flow smoothly at a lower velocity and with less resistance, significantly reducing pressure loss caused by eddies and friction. Smooth oil flow effectively suppresses fluctuations in the main pressure, improving the overall operational stability of the lubrication system.

[0018] Finally, the present invention also provides a hydraulic transmission lubrication system comprising a coarse filter as described above.

[0019] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: (1) Stable support and high reliability: By setting up a magnetic rod support, the present invention effectively supports the free end of the magnetic rod, transforming the cantilever beam structure of the magnetic rod into a double-end support structure, which significantly enhances the magnetic rod's ability to resist oil impact, completely avoids the risk of the magnetic rod tilting or breaking due to long-term impact, and ensures the stability of the filtration effect and the safe operation of the system.

[0020] (2) Ingenious structure and easy installation: The bending plate of the magnetic rod bracket is designed with a preset included angle α, which can generate pre-tightening force during installation, so that it fits tightly against the inner wall of the ring, realizing the self-locking function. No additional fixing parts are required, and installation and disassembly are very convenient.

[0021] (3) Optimize the flow path and reduce energy consumption: The oil guiding channel formed by the gap between two adjacent support plates on the magnetic rod support and the inner wall of the annulus can effectively optimize the oil flow state, reduce local resistance, and reduce pressure loss by selecting different support plate widths H to adjust the flow area. CFD simulation and experimental verification show that this structure can effectively improve the torque converter outlet flow and lubrication pressure, thereby improving the operational reliability of the hydraulic transmission.

[0022] (4) Simple structure and low cost: The magnetic rod support can be integrally formed by stamping and bending process. It has a simple structure, is easy to manufacture, has low manufacturing cost, and is convenient for industrial promotion and application in the industry. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the magnetic rod support in an embodiment of the present invention.

[0025] Figure 2 This is a front view of the magnetic rod holder in an embodiment of the present invention.

[0026] Figure 3 for Figure 2 Sectional view of AA.

[0027] Figure 4 This is a schematic diagram of the overall structure of the coarse filter in an embodiment of the present invention.

[0028] Explanation of reference numerals: 1-Magnetic rod support; 11-Support body; 12-Central hole; 13-Support plate; 14-Bending plate; M-Inner surface; N-Outer surface; P-Central axis; 2-Cylindrical filter screen; 3-Mounting plate; 3a-Mounting hole; 4-Magnetic rod; 5-Ring; 6-Screw (connector); 7-Oil guide channel; 8-Reinforcing ring. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0031] Example 1: Magnetic rod support This embodiment provides a magnetic rod support, the structure of which is as follows: Figures 1 to 3 As shown.

[0032] The magnetic rod holder 1 is made entirely from a single piece of metal sheet through stamping and bending, forming a one-piece structure. It includes a disc-shaped holder body 11. A central hole 12 is provided in the center of the holder body 11 for screws or other connectors to pass through for fixing to the end of the magnetic rod.

[0033] Three radially outwardly extending support plates 13 are evenly distributed on the circumference of the support body 11, with an included angle of 120 degrees between any two adjacent support plates 13. The ends of all support plates 13 furthest from the support body 11 are bent in the same direction to form a bent plate 14. A transition fillet with an outer diameter of R5 is provided at the bend between the bent plate 14 and the support plate 13. This fillet can guide the assembly process and prevent scratching of the mating parts.

[0034] The bent plate 14 has an inner surface M facing the central axis P of the magnetic rod support 1 and an outer surface N facing away from the central axis P, both of which are arc surfaces. Figure 3 As shown, in a free state (i.e., without external force constraints), there is an angle α between the bending plate 14 and the central axis P of the magnetic rod support 1. The value of angle α ranges from 3° to 5°. In this embodiment, the angle α is designed to be 3.5°. This angle ensures that during installation, the bending plate 14 can generate an effective radial preload with the inner wall of the mating component (such as the annulus of the coarse filter).

[0035] The magnetic rod support 1 in this embodiment, through its unique bent plate 14 structure, can provide stable end support for the magnetic rod, solving the problem of easy tilting during cantilever installation of magnetic rods in the prior art. At the same time, its structure is simple, easy to manufacture, and inexpensive.

[0036] Example 2: Coarse filter including magnetic rod support This embodiment provides a coarse filter, primarily used in the lubrication circuit of a hydraulic transmission. For example... Figure 4 As shown, the coarse filter includes the magnetic rod support 1 described in Example 1, as well as a cylindrical filter screen 2, a magnetic rod 4, a mounting plate 3, a ring 5, and screws 6 as connecting members.

[0037] The cylindrical filter screen 2 is a cylindrical shape with open ends, made of wire mesh or porous metal plate, used to filter non-magnetic impurities in the oil. A circular mounting plate 3 is fixedly connected to one end of the cylindrical filter screen 2, and a circular ring 5 is fixedly connected to the other end. In this embodiment, the cylindrical filter screen 2 is connected to the mounting plate 3 and the circular ring 5 by welding. The mounting plate 3 has a plurality of mounting holes 3a evenly distributed in a ring, used to install the entire coarse filter to the housing or pipeline of the hydraulic transmission using bolts or other fasteners. In order to enhance the radial strength of the cylindrical filter screen 2 and prevent it from denting and deforming under the action of high-pressure oil, a plurality of reinforcing rings 8 are arranged axially at intervals inside the cylindrical filter screen 2.

[0038] The magnetic rod 4 is a permanent magnet, shaped like a long rod, and is installed inside the cylindrical filter screen 2. One end of the magnetic rod 4 is fixedly connected to the center of the mounting plate 3, and the other end has a threaded hole for connecting to the magnetic rod support 1.

[0039] During assembly, the magnetic rod support 1 is first placed inside the annular body 5. Since the bent plate 14 has an included angle α in its free state, the diameter of the arc at the end of its outer surface N furthest from the support plate 13 is slightly larger than the inner diameter of the annular body 5. Therefore, it fits slightly tightly upon insertion, and the transition radius R5 at the bend serves as a guide. Then, the screw 6 is passed through the central hole 12 on the support body 11 and screwed into the threaded hole at the end of the magnetic rod 4. As the screw 6 is gradually tightened, the magnetic rod support 1 is pulled towards the magnetic rod 4 and gradually enters the annular body 5. The bent plate 14 undergoes elastic deformation and closes under the radial compression of the inner wall of the annular body 5. When the screw 6 is finally tightened, the outer surfaces N of all the bent plates 14 are tightly fitted against the inner wall of the annular body 5 and are on the same cylindrical surface; that is, the outer surfaces N of all the closed bent plates 14 are located on the same diameter. On the cylindrical surface of D (combined with) Figure 2 and Figure 3 (As shown). At this time, the elastic deformation force generated by the bending plate 14 is converted into a radial preload force on the inner wall of the annulus 5, thereby firmly fixing the magnetic rod support 1 inside the annulus 5. The magnetic rod support 1 is rigidly connected to the magnetic rod 4 by screws 6, thereby providing a stable support for the magnetic rod 4 and forming a double-end support structure for the magnetic rod 4, completely preventing it from tilting under the impact of oil.

[0040] from Figure 4As can be seen, the gap between two adjacent support plates 13, together with the inner wall of the annulus 5, forms a fan-shaped oil guiding channel 7. The oil to be filtered first enters the interior of the cylindrical filter screen 2 through this oil guiding channel 7. After entering the cylindrical filter screen 2, ferromagnetic impurities (such as iron filings and abrasive particles) in the oil are attracted by the magnetic rod 4, while non-magnetic impurities are trapped by the mesh of the cylindrical filter screen 2. The clean oil after double filtration passes through the mesh of the cylindrical filter screen 2, flows to its outside, and finally enters the downstream lubrication point.

[0041] Furthermore, the width of each support plate 13 is H. By changing the width H of the support plate 13, different specifications of magnetic rod supports 1 can be designed. On the same coarse filter, the flow area of ​​the oil guide channel 7 can be easily changed by selecting magnetic rod supports 1 with different H specifications. When it is necessary to reduce the oil flow resistance, a magnetic rod support 1 with a smaller width H of the support plate 13 can be selected, thereby obtaining a larger flow area of ​​the oil guide channel 7. A larger flow area allows the oil to pass through at a lower flow rate and in a smoother state, reducing eddies and friction, thereby significantly reducing local pressure loss. Through simulation and experimental verification, this guide channel design with a large flow area can effectively increase the flow rate at the torque converter outlet and the pressure of the lubrication system, suppress pressure fluctuations, and improve system stability.

[0042] Example 3: Hydraulic Transmission Lubrication System This embodiment provides a hydraulic transmission lubrication system. The lubrication system includes an oil pump, an oil cooler, a main oil circuit, and a coarse filter as described in Embodiment 2. The coarse filter is installed at the oil pump outlet or a key node in the main oil circuit via mounting holes on a mounting plate 3, for example, before a mass flow meter or at a valve body vent. After being pumped out by the oil pump, the lubricating oil first flows through the coarse filter of this embodiment. Inside the coarse filter, the oil undergoes efficient double filtration by a magnetic rod 4 supported by a magnetic rod holder 1 and a cylindrical filter screen 2, removing iron filings and other impurities. The filtered, clean lubricating oil then enters components requiring lubrication and cooling, such as the hydraulic torque converter, clutch, and gear bearings.

[0043] Thanks to the use of a coarse filter that can stably support the magnetic rod 4 and has an optimized flow channel, the lubrication system in this embodiment has higher operational reliability and stability, effectively protecting downstream precision components and extending the overall service life of the hydraulic transmission.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Those skilled in the art can make various improvements and modifications without departing from the spirit and principle of the invention, such as setting the number of support plates to four or more, or setting the included angle α to other angles within the range of 3° to 5° (e.g., 3°, 4°, or 5°). These improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A magnetic rod holder for supporting a magnetic rod (4) inside a coarse filter, characterized in that, The magnetic rod support (1) includes: The support body (11) has a central hole (12) for fixing to the magnetic rod (4) via the connector (6); Several support plates (13) are evenly distributed in a ring around the circumference of the support body (11), and the support plates (13) extend radially along the support body (11); each support plate (13) is bent at one end away from the support body (11) to form a bent plate (14), and all bent plates (14) have the same bending direction. In this case, the bending plate (14) has an angle α with the central axis (P) of the magnetic rod support (1) in the free state, and the value of the angle α is in the range of 3° to 5°.

2. The magnetic rod holder according to claim 1, characterized in that, The included angle α is 3.5°.

3. The magnetic rod holder according to claim 1, characterized in that, The inner surface (M) and outer surface (N) of the bent plate (14) are both arc surfaces.

4. The magnetic rod holder according to claim 1, characterized in that, The bending plate (14) and the support plate (13) are provided with a transition fillet, and the outer diameter of the transition fillet is R5.

5. The magnetic rod holder according to claim 1, characterized in that, The number of the support plates (13) is three, and the included angle between two adjacent support plates (13) is 120 degrees; the magnetic rod support (1) is an integral structure, which is formed by stamping and bending of the plate.

6. A coarse filter, characterized in that, Including the magnetic rod holder (1) as described in any one of claims 1 to 5, further comprising: Tubular filter screen (2); Mounting plate (3) is disposed at one end of the cylindrical filter screen (2); A circular ring (5) is disposed at the other end of the cylindrical filter screen (2); A magnetic rod (4) is installed inside the cylindrical filter screen (2), with one end connected to the mounting plate (3); Connector (6) fixes the other end of the magnetic rod (4) to the support body (11) of the magnetic rod support (1); The magnetic rod support (1) is located inside the annular body (5), and the outer surface (N) of the bent plate (14) is in close contact with the inner wall of the annular body (5).

7. The coarse filter according to claim 6, characterized in that, The tubular filter screen (2) has multiple reinforcing rings (8) spaced apart along its axial direction inside.

8. The coarse filter according to claim 6, characterized in that, The gap formed between two adjacent support plates (13) and the inner wall of the annulus (5) together form an oil guiding channel (7); the width of the support plate (13) is H, and the flow area of ​​the oil guiding channel (7) is adjusted by selecting magnetic rod supports (1) with different widths H.

9. The coarse filter according to claim 6, characterized in that, The connector (6) is a screw, which passes through the central hole (12) on the bracket body (11) and is then screwed onto the end face of the magnetic rod (4).

10. A hydraulic transmission lubrication system, characterized in that, Includes the coarse filter as described in any one of claims 6 to 9.

Images