Wear-resistant graphite bearing for automobile electronic water pump

Abstract

The utility model relates to the technical field of graphite bearings, in particular to a wear-resistant graphite bearing for an automobile electronic water pump, which comprises an outer ring, a dismounting assembly and a limiting assembly, the dismounting assembly is rotationally mounted in the outer ring and used for dismounting the interior of the bearing, and internal parts can be replaced conveniently; and the limiting assembly is arranged in the dismounting assembly and used for limiting and fixing the dismounting assembly and relieving limiting so as to facilitate dismounting. Compared with the prior art, the graphite bearing solves the problems that an internal rolling body of a traditional graphite bearing cannot be rapidly replaced, and the maintenance efficiency is low.

Description

Technical Field

[0001] This utility model relates to the field of graphite bearing technology, and in particular to a wear-resistant graphite bearing for automotive electronic water pumps. Background Technology

[0002] Graphite bearings are self-lubricating bearings with graphite or graphite composites as the main friction pairs, widely used in high-temperature, corrosive media, or maintenance-free applications. Compared with traditional metal rolling bearings (such as steel ball bearings) or oil-impregnated sintered bearings, graphite bearings have the following advantages: First, self-lubrication: the weak van der Waals forces between graphite layers can form a transfer film during friction, eliminating the need for additional lubricants, making them suitable for the closed coolant environment of automotive electronic water pumps. Second, corrosion resistance: they resist corrosion from ethylene glycol, acidic additives, etc. in coolants, avoiding the electrochemical corrosion problems of metal bearings. Third, lightweight and noise reduction: their density is only 1 / 5 that of steel, reducing rotor inertia. Simultaneously, graphite can absorb vibration, reducing water pump operating noise.

[0003] In the prior art, Chinese patent document CN219570617U, concerning a graphite bearing, proposes a graphite bearing with a silicon carbide ring outside the graphite bushing. An elastic element pushes the silicon carbide plate to press against the inner wall of the bearing housing. Relying on the friction between the silicon carbide ring and the inner wall of the bearing housing, the wear resistance of silicon carbide is fully utilized. When subjected to impact, due to the good impact resistance of graphite, the impact load can be fully absorbed, avoiding damage to the silicon carbide ring. This allows the graphite bearing to combine the properties of both silicon carbide and graphite materials, resulting in a long service life. However, in practical applications, most existing graphite bearings are integral structures. Once the internal rolling elements or cage wear, the entire bearing needs to be replaced, resulting in high maintenance costs and environmental pollution. A few split designs rely on complex tools for disassembly, or use threaded locking which is prone to loosening due to vibration. Therefore, there is an urgent need for a graphite bearing structure that combines quick disassembly convenience with high reliability. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a wear-resistant graphite bearing for automotive electronic water pumps, so as to solve the problems of traditional graphite bearings being unable to quickly replace internal rolling elements and having low maintenance efficiency.

[0005] To achieve the above objectives, this utility model provides a wear-resistant graphite bearing for automotive electronic water pumps, including an outer ring, a disassembly assembly, and a limiting assembly. The outer ring has a first inner ring rotatably disposed inside it, and a second inner ring is disposed on one side of the first inner ring. The outer ring, the first inner ring, and the second inner ring are connected by a plurality of ball bearings with an interference fit. Both sides of the ball bearings are engaged with a retainer.

[0006] The disassembly assembly is rotated inside the outer ring for disassembling the bearing interior and replacing internal parts;

[0007] The limiting component is located inside the disassembly component and is used to limit and fix the disassembly component and to release the limit to perform disassembly.

[0008] Preferably, the disassembly assembly includes a first inner ring, which is rotatably mounted inside the outer ring, and a second inner ring is provided on one side of the first inner ring, which is rotatably mounted inside the outer ring.

[0009] Preferably, the limiting component includes multiple receiving grooves, which are formed on one side of the first inner ring and the second inner ring. A screw is rotatably connected in the receiving groove on one side of the first inner ring. A connecting rod is fixedly connected to one side of the screw, and a threaded rod is fixedly connected to the other end of the connecting rod. A limiting ring is sleeved on the side of the threaded rod away from the connecting rod. Telescopic blocks are slidably installed on both sides of the limiting ring perpendicular to the threaded rod. A limiting sleeve is fixedly connected to one side of the limiting ring, and a pressing block is fixedly connected to one side of the limiting sleeve. The pressing block is threadedly connected to the threaded rod.

[0010] Preferably, the connecting rod passes through the first inner ring and the second inner ring, with one end of the connecting rod located in the receiving groove inside the first inner ring and the other end of the connecting rod located in the receiving groove on one side of the second inner ring.

[0011] Preferably, the threaded rod is slidably mounted on both sides of the limiting ring, and a spring is fixedly mounted on the inner side of the threaded rod located in the limiting ring.

[0012] Preferably, the diameter of the limiting sleeve is the same as the diameter of the compression block when it is not under pressure, and its diameter is greater than the diameter of the connecting rod after being squeezed by the limiting sleeve. The limiting sleeve is an elastic element.

[0013] Preferably, the telescopic block is a protrusion with smooth slopes on both sides.

[0014] The beneficial effects of this utility model are:

[0015] 1. The wear-resistant graphite bearing for the automotive electronic water pump can be unlocked by the sawtooth meshing of the first inner ring and the second inner ring and the screw drive of the limiting component. The rolling elements and cage can be replaced without disassembling the water pump housing, which greatly improves the single maintenance time. Replacing only the rolling elements instead of the entire bearing greatly reduces the cost of spare parts.

[0016] 2. The wear-resistant graphite bearing used in this automotive electronic water pump employs a limiting component with the synergistic effect of an elastic limiting sleeve and a slope expansion block. This ensures a stable connection even under vibration conditions, preventing accidental loosening caused by high-frequency vibration in traditional snap-fit ​​structures. This significantly improves reliability compared to existing technologies. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model 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 for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the limiting component structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the limiting state of a portion of the limiting component of this utility model;

[0021] Figure 4 This is a schematic diagram of the limiting component of this utility model in the released limiting state.

[0022] Figure 5 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0023] The diagram is marked as follows:

[0024] 1. Outer ring; 2. First inner ring; 3. Second inner ring; 4. Swivel ball; 5. Cage; 6. Screw; 7. Connecting rod; 8. Threaded rod; 9. Limiting ring; 10. Telescopic block; 11. Limiting sleeve; 12. Pressing block; 13. Receiving groove. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0026] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] like Figures 1 to 5 As shown, a wear-resistant graphite bearing for an automotive electronic water pump includes an outer ring 1, a disassembly assembly, and a limiting assembly. A first inner ring 2 is rotatably disposed inside the outer ring 1, and a second inner ring 3 is disposed on one side of the first inner ring 2. A plurality of ball bearings 4 are interference-fitted between the outer ring 1, the first inner ring 2, and the second inner ring 3. A retainer 5 is engaged on both sides of each ball bearing 4.

[0028] Furthermore, such as Figure 1 as well as Figure 5 As shown, the disassembly assembly is rotatably installed inside the outer ring 1 for disassembling the bearing and replacing internal parts. The disassembly assembly includes a first inner ring 2, which is rotatably installed inside the outer ring 1. A second inner ring 3 is provided on one side of the first inner ring 2, which is also rotatably installed inside the outer ring 1. The connection between the first inner ring 2 and the second inner ring 3 is serrated. Through the rotational cooperation of the first inner ring 2 and the second inner ring 3, the internal components of the bearing (such as the ball bearing 4 and the cage bearing 5) can be quickly disassembled and assembled without special tools or destructive operations, reducing maintenance time and costs. It is particularly suitable for after-sales maintenance of electronic water pumps. When the bearing is in use, the first inner ring 2 and the second inner ring 3 are fixed by the limiting assembly, forming a stable rolling structure with the ball bearing 4 and the cage bearing 5. The limiting assembly enables the first inner ring 2 and the second inner ring 3 to be axially separated. The ball bearing 4 and the cage bearing 5 are removed, and the screw 6 is rotated in the opposite direction to push the pressure block 12 to squeeze the limiting sleeve 11, causing it to expand and fix the inner ring.

[0029] Furthermore, such as Figures 1 to 4As shown, a limiting component is disposed inside the disassembly component and is used to limit and fix the disassembly component and to release the limit to perform disassembly. The limiting component includes multiple receiving grooves 13, which are opened on one side of the first inner ring 2 and the second inner ring 3. A screw 6 is rotatably connected in the receiving groove 13 on the side of the first inner ring 2. A connecting rod 7 is fixedly connected to one side of the screw 6, and a threaded rod 8 is fixedly connected to the other end of the connecting rod 7. A limiting ring 9 is sleeved on the side of the threaded rod 8 away from the connecting rod 7. Telescopic blocks 10 are slidably installed on both sides of the limiting ring 9 perpendicular to the threaded rod 8. A limiting sleeve 11 is fixedly connected to one side of the limiting ring 9, and a pressing block 12 is fixedly connected to one side of the limiting sleeve 11. The pressing block 12 and the screw 6 are connected to the threaded rod 8. The threaded rod 8 is threaded, and the connecting rod 7 passes through the first inner ring 2 and the second inner ring 3. One end of the connecting rod 7 is located in the receiving groove 13 inside the first inner ring 2, and the other end of the connecting rod 7 is located in the receiving groove 13 on one side of the second inner ring 3. The threaded rod 8 is slidably installed on both sides of the limiting ring 9. A spring is fixedly installed on the inner side of the threaded rod 8 inside the limiting ring 9. The diameter of the limiting sleeve 11 is the same as the diameter of the pressure block 12 when it is not compressed. After being compressed by the limiting sleeve 11, the diameter is greater than the diameter of the connecting rod 7. The limiting sleeve 11 is an elastic element, and the telescopic block 10 is a protrusion with smooth slopes on both sides. Under normal working conditions, the pressure block 12 cooperates with the limiting sleeve 11 to lock the first inner ring 2 and the second inner ring 3. The inner ring 3 prevents relative rotation or axial displacement. Rotating the screw 6 moves the threaded rod 8, releasing pressure on the limiting sleeve 11 and allowing the inner ring to be freely disassembled. The pressure block 12, through the screwing in of the threaded rod 8, compresses the limiting sleeve 11 (elastic element), increasing its diameter and pressing against the inner wall of the receiving groove 13, forming a friction lock. Reversing the screw 6 causes the pressure block 12 to retract, and the limiting sleeve 11 springs back (diameter restored), releasing the friction lock. The elastic limiting sleeve 11 compensates for wear gaps, preventing loosening after long-term use. Locking / unlocking can be completed simply by rotating the screw 6, making maintenance convenient. The sloping design of the telescopic block 10 allows it to slide inwards when passing through the two inner rings, engaging with the groove of the receiving groove 13, combined with the limiting... The friction lock of sleeve 11 and the mechanical interlock of telescopic block 10 provide stronger vibration resistance. The limit can only be released by actively rotating screw 6 to avoid accidental loosening. When the bearing is in the locked state, screw 6 is tightened, pushing threaded rod 8 forward. Pressure block 12 squeezes limit sleeve 11 (elastic element), the diameter of limit sleeve 11 increases, and it is tightly attached to the inner wall of receiving groove 13 to form friction lock. Telescopic block 10 extends outward under the guidance of the slope and is inserted into receiving groove 13 (mechanical interlock). When in the unlocked state, screw 6 is rotated in the opposite direction, threaded rod 8 retracts, pressure block 12 retracts, limit sleeve 11 elastically recovers, diameter decreases, and friction lock is released. At this time, first inner ring 2 and second inner ring 3 can move freely.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0031] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wear resistant graphite bearing for automotive electric water pumps, characterized by, Include: The outer ring (1), the disassembly assembly and the limiting assembly, the inner side of the outer ring (1) is rotatably provided with a first inner ring (2), one side of the first inner ring (2) is provided with a second inner ring (3), a plurality of rotating balls (4) are connected between the outer ring (1) and the first inner ring (2) and the second inner ring (3), both sides of the rotating ball (4) are clamped and connected with a retainer (5); The disassembly assembly is rotatably installed in the inner side of the outer ring (1), which is used for disassembling the inner side of the bearing and replacing the internal parts; The limiting assembly is arranged in the inner side of the disassembly assembly, which is used for limiting and fixing the disassembly assembly and dismounting.

2. The wear resistant graphite bearing for automotive electric water pump according to claim 1, characterized in that, The disassembly assembly includes a first inner ring (2), the first inner ring (2) is rotatably installed in the inner side of the outer ring (1), one side of the first inner ring (2) is provided with a second inner ring (3), the second inner ring (3) is rotatably installed in the inner side of the outer ring (1).

3. The wear resistant graphite bearing for automotive electric water pump according to claim 2, characterized in that, The limiting assembly includes a plurality of accommodating grooves (13), the accommodating grooves (13) are arranged on one side of the first inner ring (2) and the second inner ring (3), a screw (6) is rotatably connected in the accommodating groove (13) on one side of the first inner ring (2), one side of the screw (6) is fixedly connected with a connecting rod (7), the other end of the connecting rod (7) is fixedly connected with a threaded rod (8), a limiting ring (9) is arranged on the side of the threaded rod (8) away from the connecting rod (7), the limiting ring (9) is slidably installed with an expansion block (10) on both sides perpendicular to the threaded rod (8), one side of the limiting ring (9) is fixedly connected with a limiting sleeve (11), one side of the limiting sleeve (11) is fixedly connected with a compression block (12), the compression block (12) is threadedly connected with the threaded rod (8).

4. The wear resistant graphite bearing for automotive electric water pump according to claim 3, characterized in that, The connecting rod (7) penetrates the first inner ring (2) and the second inner ring (3), one end of the connecting rod (7) is located at the accommodating groove (13) in the inner side of the first inner ring (2), the other end of the connecting rod (7) is located at the accommodating groove (13) on one side of the second inner ring (3).

5. The wear resistant graphite bearing for automotive electric water pump of claim 3, wherein, The threaded rod (8) is slidably installed on both sides of the limiting ring (9), a spring is fixedly installed on the inner side of the limiting ring (9) where the threaded rod (8) is located.

6. A wear resistant graphite bearing for an automotive electric water pump as claimed in claim 3, wherein, The diameter value of the limiting sleeve (11) is consistent with the diameter value of the compression block (12) under the condition of not being pressed, the diameter value of the limiting sleeve (11) is greater than the diameter value of the connecting rod (7) after being pressed by the limiting sleeve (11), and the limiting sleeve (11) is an elastic member.

7. The wear resistant graphite bearing for automotive electric water pump of claim 3, wherein, The expansion block (10) is a convex block with smooth inclined surfaces on both sides.

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