Oil seal cold resistance test tool clamp

Abstract

The invention relates to an oil seal cold resistance test work fixture, and relates to the field of cold resistance verification of mechanical sealing elements, the oil seal cold resistance test work fixture is used for testing abnormal phenomena generated when an oil seal is non-uniformly stressed, the oil seal cold resistance test work fixture comprises a base, a deviation assembly and a test assembly, the deviation assembly comprises a deviation seat, a bearing seat, a deviation piece and an outer ring, the deviation seat and the base are movably arranged, and the bearing seat and the outer ring are movably arranged. The offset seat is provided with an offset groove, the bearing seat is provided with an offset block, the offset block is arranged in the offset groove in a sliding mode, the offset piece can drive the bearing seat to move, the outer ring and the bearing seat are fixed, and the outer ring is fixedly provided with the oil seal. The testing assembly comprises a flange and a testing column, the flange is rotationally connected with the base, and part of an oil seal lip of the oil seal abuts against the testing column; the axial direction of the test column is perpendicular to the moving direction of the bearing seat; according to the structure, the quality of the sealing lip of the oil seal can be effectively inspected and controlled in the cold resistance test of the oil seal.

Description

Technical Field

[0001] This invention relates to the field of cold resistance verification of mechanical seals, and in particular to a tooling fixture for testing the cold resistance of oil seals. Background Technology

[0002] In the field of sealing components, oil seals, as core components for preventing fluid leakage, are widely used in rotating or reciprocating motion scenarios such as automotive engines, engineering machinery transmission systems, and aerospace hydraulic mechanisms. Their cold resistance directly affects the operational reliability of equipment in cold climates or low-temperature conditions. However, current methods for testing the cold resistance of oil seals have significant shortcomings. Existing tests typically involve placing the oil seal in a low-temperature environment for a period of time and then visually inspecting it for cracks. This static testing method cannot simulate the dynamic contact between the oil seal and a high-speed rotating shaft at low temperatures, nor the real-world conditions of the oil seal being subjected to non-uniform forces due to radial offset. Therefore, it is difficult to accurately assess its risk of cracking failure under complex conditions. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, which is that due to the lack of special tooling, it is impossible to effectively clamp bearings containing oil seals, cannot provide high-speed rotating shafts that simulate real working conditions, and cannot test the uneven stress and abnormal failure of oil seals caused by radial runout or installation misalignment. Therefore, the present invention provides a tooling fixture for testing the cold resistance of oil seals.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A fixture for testing the cold resistance of oil seals, used to test abnormal phenomena caused by uneven stress on oil seals, is characterized by comprising: a rack provided on the upper side of the base along the vertical direction, the rack being able to mesh with a toothed groove provided on the lower side of the moving block along the vertical direction, so that the offset component can achieve horizontal displacement.

[0006] The offset assembly includes an offset seat, a bearing seat, an offset component, and an outer ring. The offset seat is movably disposed from the base. The offset seat has an offset groove, and the bearing seat has an offset block. The offset block is slidably disposed within the offset groove. The offset component can drive the bearing seat to move. The outer ring is fixed to the bearing seat, and the oil seal is fixedly disposed on the outer ring. Because the offset seat and the base are movably disposed, the offset seat has an offset groove, the bearing seat has an offset block, the offset block is slidably disposed within the offset groove, the offset component can drive the bearing seat to move, and the outer ring is fixed to the bearing seat, the outer ring can use the engagement between the offset block and the offset groove to prevent the offset block from radial and axial movement caused by the rotation of the test column, thereby ensuring the accuracy of the oil seal cold resistance test results.

[0007] The testing assembly includes a flange and a test column. The flange transmits the power of the system to the test column. The flange is rotatably connected to the base. One end of the test column is fixed to the flange, and the other end of the test column is inserted into the outer ring. At least a portion of the oil seal lip abuts against the test column. The axial direction of the test column is perpendicular to the moving direction of the bearing housing. Because the flange is rotatably connected to the base, one end of the test column is fixed to the flange, and the other end of the test column is inserted into the outer ring, with at least a portion of the oil seal lip abutting against the test column, the flange and the test column can remain relatively stationary. This allows the flange to drive the test column to detect the quality of the oil seal lip.

[0008] Preferably, the outer ring is provided with an annular groove, the oil seal is fixedly engaged in the groove, and the oil seal is coaxially arranged with the outer ring; because the outer ring is provided with an annular groove, the oil seal is fixedly engaged in the groove, and the oil seal is coaxially arranged with the outer ring, so that the oil seal is always located in the annular groove during the test, and will not be displaced due to the rotation of the test column.

[0009] Preferably, the bearing housing is provided with a mounting hole, the outer ring is fixedly disposed in the mounting hole, and the mounting hole, the outer ring, and the oil seal are coaxially arranged. Since the outer ring is fixedly disposed in the mounting hole, and the mounting hole, the outer ring, and the oil seal are coaxially arranged, the offset component can be used to adjust the required offset within the mounting hole, greatly enhancing the achievable range of the test offset.

[0010] Preferably, the offset assembly further includes two supports, both of which are fixed to the offset seat and located on opposite sides of the bearing seat's movement direction. Because the two supports are fixed to the offset seat and located on opposite sides of the bearing seat's movement direction, the bearing seat is stabilized. Two offset members are provided, each movably mounted on one of the two supports, with the movement direction of the offset members perpendicular to the axial direction of the test column. This movability of the offset members ensures they have a designated placement position and improves the stability of the bearing seat.

[0011] Preferably, the offset component further includes a moving block, which is movably disposed from the base, and the moving direction of the moving block is parallel to the axial direction of the test column; since the moving block is movably disposed from the base and the moving direction of the moving block is parallel to the axial direction of the test column, the moving block can drive the offset component to move in the horizontal direction.

[0012] Preferably, the offset groove includes a first groove and a second groove that are connected, and the first groove is located below the second groove. Along the axial direction of the test column, the width of the first groove is greater than the width of the second groove. The offset block includes an integrally formed first block and a second block. The first block is located below the second block. Along the axial direction of the test column, the width of the first block is greater than the width of the second block. The first block is slidably disposed in the first groove, and the second block is slidably disposed in the second groove. Because the first block is slidably disposed in the first groove and the second block is slidably disposed in the second groove, the offset seat and the bearing seat are assembled and vertically positioned.

[0013] Preferably, the flange has a fixing part protruding from the side facing the test column, and the fixing part has a fixing cavity, in which a portion of the test column is fixedly disposed; since the flange has a fixing part protruding from the side facing the test column, and the fixing part has a fixing cavity, and a portion of the test column is fixedly disposed in the fixing cavity, the test column can be stably disposed inside the fixing cavity, thereby enabling the test column to achieve rotation transmitted by the flange.

[0014] Preferably, the end of the test column near the outer ring is provided with a first step, a second step, and a third step with gradually increasing diameters, and the second step can abut against the sealing lip of the oil seal; because the end of the test column near the outer ring is provided with a first step, a second step, and a third step with gradually increasing diameters, and the second step can abut against the sealing lip of the oil seal, the sealing lip of the oil seal can receive the test rotation generated by the test column, thereby simulating the amount of interference required for the test.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The oil seal cold resistance test fixture provided in the above technical solution, through the cooperation between the base, the offset component and the test component, uses the flange to transmit the power required for the operation of the equipment to the test column, the offset component adjusts the required offset of the bearing seat, and places the outer ring in the mounting hole on the bearing seat. The engagement between the offset seat and the bearing seat achieves positioning. In the above way, the required eccentric working condition is simulated and the quality of the oil seal operation under eccentric working condition is ensured. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the overall assembly structure of the oil seal cold resistance test fixture provided by the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the offset component provided by the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the offset seat provided by the present invention;

[0021] Figure 4 This is a schematic diagram of the bearing housing provided by the present invention;

[0022] Figure 5 This is a schematic diagram of the outer ring structure provided by the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the test component provided by the present invention;

[0024] Figure 7 This is a schematic diagram of the flange structure provided by the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the test column provided by the present invention;

[0026] Figure 9 This is a partially enlarged structural diagram of the test column provided by the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Base;

[0029] 2. Offset assembly; 21. Offset seat; 211. Offset groove; 2111. First groove; 2112. Second groove; 22. Bearing seat; 221. Offset block; 2211. First block; 2212. Second block; 222. Mounting hole; 23. Offset component; 24. Outer ring; 241. Slot; 25. Bracket; 26. Moving block;

[0030] 3. Test assembly; 31. Flange; 311. Fixing part; 3111. Fixing cavity; 32. Test column; 321. First step part; 322. Second step part; 323. Third step part; 4. Oil seal. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Please read carefully. Figures 1 to 9 This invention provides a tooling fixture for testing the cold resistance of oil seals, including a base 1, an offset component 2, a test component 3, and an oil seal 4.

[0035] Specifically, a rack is provided on the upper side of the base 1 along the vertical direction. The rack can mesh with the toothed groove provided on the lower side of the moving block 26 along the vertical direction, so that the offset component 2 can achieve horizontal displacement.

[0036] The offset assembly 2 includes an offset seat 21, a bearing seat 22, an offset component 23, and an outer ring 24. The offset seat 21 is movably disposed from the base 1. The offset seat 21 is provided with an offset groove 211. The bearing seat 22 is provided with an offset block 221, which is slidably disposed within the offset groove 211. The offset component 23 can drive the bearing seat 22 to move. The outer ring 24 is fixed to the bearing seat 22 and is fixedly provided with an oil seal 4. Because the offset seat 21 is movably disposed from the base 1, the offset seat 21 is provided with an offset groove 211, the bearing seat 22 is provided with an offset block 221, which is slidably disposed within the offset groove 211, and the offset component 23 can drive the bearing seat 22 to move, and the outer ring 24 is fixed to the bearing seat 22, the outer ring 24 can use the engagement between the offset block 221 and the offset groove 211 to prevent the offset block 221 from radial and axial movement caused by the rotation of the test column 32, thereby ensuring the accuracy of the oil seal cold resistance test results.

[0037] The test assembly 3 includes a flange 31 and a test column 32. The flange 31 transmits the power of the system operation to the test column 32. The flange 31 is rotatably connected to the base 1. One end of the test column 32 is fixed to the flange 31, and the other end of the test column 32 is inserted into the outer ring 24. At least a portion of the oil seal 4's oil seal lip abuts against the test column 32. The axial direction of the test column 32 is perpendicular to the moving direction of the bearing seat 22. Because the flange 31 is rotatably connected to the base 1, one end of the test column 32 is fixed to the flange 31, and the other end of the test column 32 is inserted into the outer ring 24, and one-third of the oil seal 4's oil seal lip abuts against the test column 32, the flange 31 can maintain a relatively stationary state with the test column 32. This allows the flange 31 to drive the test column 32 to detect the quality of the oil seal lip of the oil seal 4.

[0038] The outer ring 24 is provided with an annular groove 241 with a diameter of 10mm. The oil seal 4 is fixedly clamped in the groove 241 and is coaxial with the outer ring 24. Because the outer ring 24 is provided with an annular groove 241 and the oil seal 4 is fixedly clamped in the groove 241 and is coaxial with the outer ring 24, the oil seal 4 is always located in the annular groove 241 during the test and will not be displaced due to the rotation of the test column 32.

[0039] The bearing housing 22 is provided with a mounting hole 222, and the outer ring 24 is fixedly set in the mounting hole 222. The mounting hole 222, the outer ring 24, and the oil seal 4 are coaxially arranged. Since the outer ring 24 is fixedly set in the mounting hole 222, and the mounting hole 222, the outer ring 24, and the oil seal 4 are coaxially arranged, the offset component 23 can be used to adjust the required offset within the mounting hole 222, which greatly enhances the achievable range of the test offset.

[0040] The offset assembly 2 also includes two brackets 25, both of which are fixed to the offset seat 21 by threaded connection, and the two brackets 25 are located on both sides of the bearing seat 22 in the direction of movement. Since the two brackets 25 are fixed to the offset seat 21 and located on both sides of the bearing seat 22 in the direction of movement, the bearing seat 22 is stabilized. Preferably, there are two offset members 23, each movably mounted on one of the two brackets 25, with the direction of movement of the offset members 23 perpendicular to the axis of the test column 32. Because the two offset members 23 are movably mounted on the two brackets 25 and their direction of movement is perpendicular to the axis of the test column 32, the offset members 23 have a placement position and contribute to improving the stability of the bearing seat 22.

[0041] The offset component 2 also includes a movable block 26, which is movably configured with respect to the base 1, and the moving direction of the movable block 26 is parallel to the axis of the test column 32. Since the movable block 26 is movably configured with respect to the base 1, and the moving direction of the movable block 26 is parallel to the axis of the test column 32, the movable block 26 can drive the offset component 2 to move in the horizontal direction.

[0042] The offset groove 211 includes a first groove 2111 and a second groove 2112 that are connected, and the first groove 2111 is located below the second groove 2112 along the axial direction of the test column 32. The width of the first groove 2111 is greater than the width of the second groove 2112. The offset block 221 includes an integrally formed first block 2211 and a second block 2212. The first block 2211 is located below the second block 2212 along the axial direction of the test column 32. The width of the first block 2211 is greater than the width of the second block 2212. The first block 2211 is slidably disposed in the first groove 2111, and the second block 2212 is slidably disposed in the second groove 2112. Since the first block 2211 is slidably disposed in the first groove 2111 and the second block 2212 is slidably disposed in the second groove 2112, the offset seat 21 and the bearing seat 22 are assembled and the vertical positioning is completed.

[0043] The flange 31 has a protruding fixing part 311 on the side facing the test column 32. The fixing part 311 has a fixing cavity 3111, and the test column 32 is fixedly installed in the fixing cavity 3111. Since the flange 31 has a protruding fixing part 311 on the side facing the test column 32, and the fixing part 311 has a fixing cavity 3111, part of the test column 32 is fixedly installed in the fixing cavity 3111, so that the test column 32 can be stably installed inside the fixing cavity 3111, thereby enabling the test column 32 to realize the rotation transmitted by the flange 31.

[0044] The end of the test column 32 near the outer ring 24 is provided with a first step 321, a second step 322, and a third step 323 with gradually increasing diameters. The second step 322 can abut against the sealing lip of the oil seal 4. Because the end of the test column 32 near the outer ring 24 is provided with a first step 321, a second step 322, and a third step 323 with gradually increasing diameters, and the second step 322 can abut against the sealing lip of the oil seal 4, the sealing lip of the oil seal 4 can receive the test rotation generated by the test column 32, thereby simulating the interference amount required for the test.

[0045] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A fixture for testing the cold resistance of an oil seal, used to test abnormal phenomena caused by uneven stress on an oil seal (4), characterized in that, include: Base (1); The offset assembly (2) includes an offset seat (21), a bearing seat (22), an offset component (23), and an outer ring (24). The offset seat (21) is movably disposed from the base (1). The offset seat (21) is provided with an offset groove (211). The bearing seat (22) is provided with an offset block (221). The offset block (221) is slidably disposed in the offset groove (211). The offset component (23) can drive the bearing seat (22) to move. The outer ring (24) is fixed to the bearing seat (22). The outer ring (24) is fixedly provided with the oil seal (4). The test assembly (3) includes a flange (31) and a test column (32). The flange (31) is rotatably connected to the base (1). One end of the test column (32) is fixed to the flange (31), and the other end of the test column (32) is inserted into the outer ring (24). At least part of the oil seal lip of the oil seal (4) abuts against the test column (32). The axial direction of the test column (32) is perpendicular to the moving direction of the bearing seat (22).

2. The oil seal cold resistance testing fixture according to claim 1, characterized in that, The outer ring (24) is provided with an annular groove (241), the oil seal (4) is fixedly installed in the groove (241), and the oil seal (4) is coaxially arranged with the outer ring (24).

3. The oil seal cold resistance testing fixture according to claim 1, characterized in that, The bearing housing (22) is provided with a mounting hole (222), and the outer ring (24) is fixedly disposed in the mounting hole (222). The mounting hole (222), the outer ring (24), and the oil seal (4) are coaxially disposed.

4. The oil seal cold resistance testing fixture according to claim 1, characterized in that, The offset assembly (2) also includes two brackets (25), both brackets (25) are fixed to the offset seat (21), and the two brackets (25) are located on both sides of the moving direction of the bearing seat (22); the offset member (23) is provided as two, and the two offset members (23) are respectively movably disposed on the two brackets (25), and the moving direction of the offset member (23) is perpendicular to the axis of the test column (32).

5. The oil seal cold resistance testing fixture according to claim 1, characterized in that, The offset component (2) further includes a moving block (26), which is movably disposed from the base (1), and the moving direction of the moving block (26) is parallel to the axis of the test column (32).

6. The oil seal cold resistance testing fixture according to claim 1, characterized in that, The offset groove (211) includes a first groove (2111) and a second groove (2112) that are connected, and the first groove (2111) is located below the second groove (2112). Along the axial direction of the test column (32), the width of the first groove (2111) is greater than the width of the second groove (2112). The offset block (221) includes an integrally formed first block (2211) and a second block (2212). The first block (2211) is located below the second block (2212) along the axial direction of the test column (32). The width of the first block (2211) is greater than the width of the second block (2212). The first block (2211) is slidably disposed in the first groove (2111), and the second block (2212) is slidably disposed in the second groove (2112).

7. The oil seal cold resistance testing fixture according to claim 1, characterized in that, The flange (31) has a fixing part (311) protruding from the side facing the test column (32). The fixing part (311) has a fixing cavity (3111), and part of the test column (32) is fixedly disposed in the fixing cavity (3111).

8. The oil seal cold resistance testing fixture according to claim 1, characterized in that, The test column (32) has a first step (321), a second step (322), and a third step (323) with gradually increasing diameter at the end near the outer ring (24). The second step (322) can abut against the sealing lip of the oil seal (4).

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