Multi-wedge type sealing oil leakage prevention crankshaft

Abstract

The utility model discloses a multi-wedge type sealing oil-leakage-proof crankshaft, which belongs to the technical field of crankshafts and comprises a main journal, a flange fixedly connected to the tail end of the main journal, a front end shaft fixedly connected to the end of the main journal and a movable sealing piece mounted on the outer side of the front end shaft. A protruding shoulder head is fixedly connected to the outer wall of the front end shaft, a wedge-shaped face is arranged at the end, close to the end of the front end shaft, of the protruding shoulder head, the wedge-shaped sealing ring can be attached to the wedge-shaped face arranged at the protruding shoulder head through the wedge-shaped face of the wedge-shaped sealing ring, then a pressing cover is fixed to the front end shaft, and finally a screw is installed at the pressing cover. When the crankshaft is in use, the screw presses the pressing ring, so that the wedge-shaped sealing ring is extruded, the wedge-shaped sealing ring is tightly abutted against the wedge-shaped surface, and meanwhile, the wedge-shaped sealing ring is filled in a gap of a combined part of the wedge-shaped sealing ring and the movable sealing element, so that the integral sealing effect of the crankshaft is improved by a plurality of wedge-shaped sealing nodes, and oil leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshafts, and more specifically to a multi-wedge sealing oil leakage-proof crankshaft. Background Art

[0002] The crankshaft is a device that converts the gas pressure acting on the top of the piston into crankshaft torque and outputs it to the automobile transmission system. When the crankshaft is working, it will be subjected to torque and bending moment generated by periodic gas pressure, reciprocating inertia force and centrifugal force. For this reason, the crankshaft is required to have good lubrication and wear resistance on its working surfaces. Therefore, it needs to be lubricated with lubricating oil or grease when it is working.

[0003] However, when lubricating oil is used to lubricate it, it is often difficult to ensure the sealing performance of the lubricating oil by relying solely on an existing oil seal, especially during the rotation process, the sealing ability of the oil seal is poor, and accidents such as oil leakage often occur, thereby affecting the performance of the entire engine. An existing patent is an anti-leakage structure of an automobile engine crankshaft oil seal, and the patent authorization number CN211231584U can maximize the movement of the lubricating oil away from the oil seal when the shaft rotates by setting an oil-slinging plate and a sleeve fixedly connected thereto, thereby reducing the contact between the lubricating oil and the oil seal during the rotation of the shaft, thereby effectively solving the disadvantage that the sealing ability of the oil seal is not strong enough when the shaft rotates.

[0004] However, the oil pan, sleeve and volute in patent authorization number CN211231584U work together to ensure that only a small amount of lubricating oil contacts the oil seal during the rotation of the shaft to the greatest extent, effectively avoiding the problem of weak sealing ability of the oil seal when the shaft rotates, thereby greatly reducing the possibility of oil leakage. Since the oil seal has a single sealing structure, in order to improve the sealing effect, it is necessary to increase the sealing nodes. Therefore, we proposed a multi-wedge sealing anti-leakage crankshaft to solve the above-mentioned problems. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a multi-wedge sealing anti-oil leakage crankshaft, which can make the wedge surface of the wedge-shaped sealing ring fit with the wedge surface set at the boss head, and then fix the clamping cover on the front end shaft, and finally install screws at the clamping cover to make the screws crimp the pressure ring, thereby squeezing the wedge-shaped sealing ring, making the wedge-shaped sealing ring tightly abut against the wedge surface, and at the same time making the wedge-shaped sealing ring fill the gap at the joint with the dynamic seal, so as to improve the overall sealing effect of the crankshaft with multiple wedge-shaped sealing nodes, thereby avoiding oil leakage.

[0007] 2. Technical solution

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] A multi-wedge seal oil leakage prevention crankshaft comprises a main journal, a flange fixedly connected to the end of the main journal, a front end shaft fixedly connected to the end of the main journal, and a dynamic seal installed on the outside of the front end shaft, wherein a convex shoulder is fixedly connected to the outer wall of the front end shaft, and a wedge-shaped surface is arranged at one end of the convex shoulder near the end of the front end shaft;

[0010] A wedge-shaped sealing ring is fitted on the wedge-shaped surface;

[0011] A pressure ring is installed on the side of the wedge-shaped sealing ring away from the convex shoulder head;

[0012] A clamping cover is fixedly connected to one side of the compression ring away from the wedge-shaped sealing ring, and countersunk screw holes are symmetrically opened at one end of the compression cover away from the compression ring, and the countersunk screw holes penetrate the compression cover, and screws are installed on the inner side of the countersunk screw holes, and the end of the screw is tightly abutted against the compression ring.

[0013] Furthermore, an elastic washer and a flat washer are sequentially sleeved on one end of the screw close to the nut.

[0014] Furthermore, the elastic gasket and the flat washer are both located inside the end of the countersunk screw hole;

[0015] The outer diameters of the elastic gasket and the flat washer are both matched with the inner diameter of the end of the countersunk screw hole.

[0016] Furthermore, a mounting hole is provided on the side wall of the clamping cover, and two mounting holes are symmetrically arranged in the radial direction of the clamping cover.

[0017] Furthermore, a pin hole is provided at a position of the side wall of the front end shaft corresponding to the mounting hole.

[0018] Furthermore, a pin is inserted into the inner side of the mounting hole, and the end of the pin is interference-connected with the pin hole.

[0019] Furthermore, the outer side walls of the boss head, the wedge-shaped sealing ring, the pressure ring and the clamping cover are all tightly fitted with the inner side wall of the dynamic seal.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] (1) This scheme, by sleeve-mounting a wedge-shaped sealing ring on the front end shaft, making the wedge surface of the wedge-shaped sealing ring fit with the wedge surface set on the boss head, then sleeve-mounting a pressure ring and a clamping cover on the front end shaft in sequence, then fixing the clamping cover on the front end shaft, and finally installing screws on the clamping cover, so that the screws press the pressure ring, thereby squeezing the wedge-shaped sealing ring, making the wedge-shaped sealing ring tightly abut against the wedge surface, and making the wedge-shaped sealing ring fill the gap at the joint with the dynamic seal, so as to improve the overall sealing effect of the crankshaft with multiple wedge-shaped sealing nodes, thereby avoiding oil leakage.

[0023] (2) This solution can effectively prevent the screw from loosening by assembling the screw on the inner side of the countersunk screw hole and using an elastic gasket in combination with a flat washer, thereby ensuring the tightening effect of the screw on the pressure ring, thereby ensuring the sealing effect of the wedge-shaped sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0026] Figure 3 It is a schematic side view of the front end axis of the utility model;

[0027] Figure 4 It is a schematic cross-sectional view of the front end shaft AA portion of the utility model;

[0028] Figure 5 It is an enlarged schematic diagram of part A of the present invention.

[0029] Description of the numbers in the figure:

[0030] 1. Main shaft neck; 2. Flange; 3. Front end shaft; 4. Dynamic seal; 5. Shoulder head; 6. Wedge surface; 7. Wedge seal ring; 8. Pressure ring; 9. Pressure cover; 10. Mounting hole; 11. Pin hole; 12. Pin; 13. Countersunk screw hole; 14. Screw; 15. Elastic gasket; 16. Flat washer. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0032] Example:

[0033] See also Figure 1-5, a multi-wedge sealing anti-leakage crankshaft, comprising a main journal 1, a flange 2 fixedly connected to the end of the main journal 1, a front end shaft 3 fixedly connected to the end of the main journal 1 and a dynamic seal 4 installed on the outside of the front end shaft 3, a convex shoulder 5 fixedly connected to the outer wall of the front end shaft 3, and a wedge-shaped surface 6 is arranged at one end of the convex shoulder 5 close to the end of the front end shaft 3;

[0034] A wedge-shaped sealing ring 7 is fitted on the wedge-shaped surface 6;

[0035] A pressure ring 8 is installed on the side of the wedge-shaped sealing ring 7 away from the convex shoulder head 5;

[0036] A compression cover 9 is fixedly connected to the side of the compression ring 8 away from the wedge-shaped sealing ring 7, and a countersunk screw hole 13 is symmetrically opened at one end of the compression cover 9 away from the compression ring 8, and the countersunk screw hole 13 penetrates the compression cover 9, and a screw 14 is installed inside the countersunk screw hole 13, and the end of the screw 14 is tightly abutted against the compression ring 8;

[0037] It should be noted that when the multi-wedge sealing oil leakage prevention crankshaft is in use, the wedge-shaped sealing ring 7 is sleeved on the front end shaft 3 so that the wedge surface of the wedge-shaped sealing ring 7 fits with the wedge surface 6 set at the boss head 5, and then the pressure ring 8 and the clamping cover 9 are sleeved on the front end shaft 3 in sequence, and then the clamping cover 9 is fixed on the front end shaft 3, and finally the screw 14 is installed on the clamping cover 9 so that the screw 14 crimps the pressure ring 8, thereby squeezing the wedge-shaped sealing ring 7, so that the wedge-shaped sealing ring 7 is tightly abutted against the wedge surface 6, and the wedge-shaped sealing ring 7 fills the gap at the joint with the dynamic seal 4, so as to improve the overall sealing effect of the crankshaft with multiple wedge-shaped sealing nodes, thereby avoiding oil leakage.

[0038] like Figure 5 The end of the screw 14 close to the nut is sleeved with an elastic washer 15 and a flat washer 16 in sequence, the elastic washer 15 and the flat washer 16 are both located on the inner side of the end of the countersunk screw hole 13, and the outer diameters of the elastic washer 15 and the flat washer 16 are both adapted to the inner diameter of the end of the countersunk screw hole 13;

[0039] It should be noted that by assembling the screw 14 on the inner side of the countersunk screw hole 13 and using the elastic gasket 15 in conjunction with the flat washer 16, the screw 14 can be effectively prevented from loosening, thereby ensuring the tightening effect of the screw 14 on the pressure ring 8, thereby ensuring the sealing effect of the wedge-shaped sealing ring 7.

[0040] like Figure 4 As shown, the side wall of the clamping cover 9 is provided with a mounting hole 10, and two mounting holes 10 are symmetrically arranged in the radial direction of the clamping cover 9, and the side wall of the front end shaft 3 is provided with a pin hole 11 at a position corresponding to the mounting hole 10, and a pin 12 whose end is interference-connected with the pin hole 11 is inserted into the inner side of the mounting hole 10;

[0041] It should be noted that by making the mounting hole 10 provided at the clamping cover 9 correspond to the pin hole 11 opened on the side wall of the front end shaft 3, and then inserting the pin 12 into the inner side of the mounting hole 10 and interferingly connecting with the pin hole 11, the clamping cover 9 is conveniently fixed.

[0042] like Figure 2 As shown, the outer side walls of the shoulder head 5 , the wedge-shaped sealing ring 7 , the pressure ring 8 and the pressing cover 9 are all tightly fitted with the inner side wall of the dynamic seal 4 .

[0043] When in use: by sleeved the wedge-shaped sealing ring 7 on the front end shaft 3, the wedge surface of the wedge-shaped sealing ring 7 is fitted with the wedge surface 6 set on the boss head 5, and then the pressure ring 8 and the clamping cover 9 are sleeved on the front end shaft 3 in sequence, and then the clamping cover 9 is fixed on the front end shaft 3, and finally the screws 14 are installed on the clamping cover 9, so that the screws 14 are pressed against the pressure ring 8, thereby squeezing the wedge-shaped sealing ring 7, so that the wedge-shaped sealing ring 7 is tightly abutted against the wedge surface 6, and the wedge-shaped sealing ring 7 fills the gap at the joint with the dynamic seal 4.

[0044] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A multi-wedge seal oil leakage prevention crankshaft, comprising a main journal (1), a flange (2) fixedly connected to the end of the main journal (1), a front end shaft (3) fixedly connected to the end of the main journal (1), and a dynamic seal (4) installed on the outside of the front end shaft (3), characterized in that: The outer wall of the front end shaft (3) is fixedly connected with a boss head (5), and one end of the boss head (5) close to the end of the front end shaft (3) is provided with a wedge surface (6); A wedge-shaped sealing ring (7) is fitted on the wedge-shaped surface (6); A pressure ring (8) is installed on the side of the wedge-shaped sealing ring (7) away from the boss head (5); A clamping cover (9) is fixedly connected to the side of the compression ring (8) away from the wedge-shaped sealing ring (7); a countersunk screw hole (13) is symmetrically opened at one end of the compression cover (9) away from the compression ring (8); and the countersunk screw hole (13) passes through the compression cover (9); a screw (14) is installed on the inner side of the countersunk screw hole (13), and the end of the screw (14) is tightly abutted against the compression ring (8).

2. The multi-wedge seal oil leakage prevention crankshaft according to claim 1, characterized in that: An elastic washer (15) and a flat washer (16) are sequentially sleeved on one end of the screw (14) close to the nut.

3. The multi-wedge seal oil leakage prevention crankshaft according to claim 2, characterized in that: The elastic gasket (15) and the flat washer (16) are both located on the inner side of the end of the countersunk screw hole (13); The outer diameters of the elastic gasket (15) and the flat washer (16) are both adapted to the inner diameter of the end of the countersunk screw hole (13).

4. The multi-wedge seal oil leakage prevention crankshaft according to claim 1, characterized in that: A mounting hole (10) is provided on the side wall of the clamping cover (9), and two mounting holes (10) are symmetrically arranged in the radial direction of the clamping cover (9).

5. The multi-wedge seal oil leakage prevention crankshaft according to claim 4, characterized in that: A pin hole (11) is provided on the side wall of the front end shaft (3) at a position corresponding to the mounting hole (10).

6. The multi-wedge seal oil leakage prevention crankshaft according to claim 5, characterized in that: A pin (12) is inserted into the inner side of the mounting hole (10), the end of which is interference-connected with the pin hole (11).

7. The multi-wedge seal oil leakage prevention crankshaft according to claim 1, characterized in that: The outer side walls of the shoulder head (5), the wedge-shaped sealing ring (7), the pressure ring (8) and the pressing cover (9) are all tightly fitted with the inner side wall of the dynamic sealing member (4).

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