Shaft end sealing tool for air tightness detection of electric drive axle housing

Abstract

The utility model discloses a shaft end sealing tool for detecting the air tightness of an electric drive axle housing, which comprises a fixed plate, the center of the fixed plate is provided with a puller bolt in a threaded manner, the center of a movable plate is provided with an adjusting sleeve in a penetrating manner through a bearing seat, one end of a tensioning threaded rod penetrates through a second track window, and the second track window is arranged at the end part of the fixed plate. A locking nut is installed at one end of the tensioning threaded rod, a tensioning block is fixedly installed at the other end of the tensioning threaded rod, the tensioning threaded rod penetrates through a positioning hole, the positioning hole is formed in the center of the mounting plate, and an adjusting threaded rod is installed at the end of the mounting plate in a penetrating and threaded mode; and the tail end of the adjusting threaded rod is rotationally connected with one side of the extrusion plate through a bearing seat. According to the shaft end sealing tool for air tightness detection of the electric drive axle housing, a novel structural design is adopted, the distance between the tensioning mechanisms can be conveniently adjusted and fixed, the shaft end sealing tool is suitable for electric drive axle housings of different sizes, point positions of the positioning mechanisms are increased, and the overall stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of axle housing sealing, in particular to a shaft end sealing tool for detecting the air tightness of an electric drive axle housing. Background Art

[0002] The electric drive axle housing is one of the main parts on road vehicles. It is both a load-bearing part and a force-transmitting part. In the electric drive axle, the axle housing mainly plays the role of supporting the vehicle load and transmitting the load to the wheels. At the same time, the axle housing is also the housing of the main reducer, differential and drive wheel transmission device.

[0003] Existing shaft-end sealing fixtures for testing the air tightness of electric drive axle housings, such as the Chinese utility model patent with publication number CN221525546U, entitled "A Shaft-End Sealing Fixture for Testing the Air Tightness of Electric Drive Axle Housings," include a fixing frame, the left and right ends of which extend toward each other in a hook-like shape. A sealing gasket cover is slidably connected to the interior of the fixing frame, and a sealing gasket is fixedly connected to the top of the sealing gasket cover. The size of the sealing gasket matches the size of the inner cavity hole at the end of the axle housing. A tightening bolt is threadedly connected to the bottom of the fixing frame, and the end of the tightening bolt passes from bottom to top through the bottom of the fixing frame to contact and tighten with the bottom of the sealing gasket cover. The tightening rods in this patent solution have a fixed installation spacing and can only be used to position electric drive axle housings of fixed size. The positioning contact structure has a single contact point, and the overall stability after installation is insufficient. In response to the above problems, there is an urgent need for an innovative design based on the existing shaft-end sealing fixture for testing the air tightness of electric drive axle housings. Utility Model Content

[0004] The purpose of the present utility model is to provide a shaft end sealing tool for detecting the air tightness of an electric drive axle housing, so as to solve the problem in the above-mentioned background technology that the installation spacing of the tension rods of the existing device is fixed, and only the electric drive axle housing of fixed size can be positioned, and the contact point of the positioning contact structure is single, and the overall stability after installation is insufficient.

[0005] To achieve the above object, the present utility model provides the following technical solution: A shaft end sealing tooling for airtightness detection of an electric drive axle housing, including a fixing plate, a tightening bolt is threadedly installed at the center of the fixing plate, the top end of the tightening bolt is in contact with the center of the bottom surface of a support plate, the support plate is fixedly installed at the center of the bottom surface of a gasket cover, a gasket body is installed on the top surface of the gasket cover, a screw is installed at the center of the gasket body, a first track window is opened at the end of the gasket cover, a movable plate is installed in the first track window, one side of the movable plate is rotatably installed with a side threaded rod through a bearing seat, the side threaded rod penetrates through the end of the gasket cover, a regulating sleeve is installed through the center of the movable plate through a bearing seat, a tensioning threaded rod is installed through the center of the regulating sleeve, one end of the tensioning threaded rod penetrates through a second track window, the second track window is opened at the end of the fixing plate, a locking nut is installed at one end of the tensioning threaded rod, a tensioning block is fixedly installed at the other end of the tensioning threaded rod, the tensioning threaded rod penetrates through a positioning hole, the positioning hole is opened at the center of a mounting plate, and an adjusting threaded rod is threadedly installed through the end of the mounting plate, and the end of the adjusting threaded rod is rotatably connected to one side of a pressing plate through a bearing seat.

[0006] Preferably, the first track window and the movable plate are both symmetrically distributed about the center of the gasket cover, and the movable plate is slidably connected to the first track window.

[0007] Preferably, the side view section of the movable plate is "I"-shaped, the center of the movable plate and the center of the side threaded rod are on the same vertical plane, and the side threaded rod is threadedly connected to the hole opened on the side wall of the first track window at the end of the gasket cover.

[0008] Preferably, the front view section of the regulating sleeve is "丄"-shaped, and the regulating sleeve is threadedly connected to the tensioning threaded rod.

[0009] Preferably, the locking nuts are symmetrically distributed up and down about the center of the second track window, and the second track window is slidably connected to the tensioning threaded rod.

[0010] Preferably, the adjusting threaded rods are symmetrically distributed about the center of the pressing plate, the center of the pressing plate and the center of the positioning hole are on the same vertical plane, and the positioning hole is slidably connected to the tensioning threaded rod.

[0011] Compared with the prior art, the beneficial effects of the present utility model are: The shaft end sealing tooling for airtightness detection of this electric drive axle housing adopts a novel structural design. Not only can the distance of the tensioning mechanism be conveniently adjusted and fixed to adapt to electric drive axle housings of different sizes, but also the number of points of the positioning mechanism increases, and the overall stability is improved;

[0012] 1. By rotating the side threaded rod, the movable plate, adjustment sleeve, and tensioning threaded rod slide along the first track window to adjust the working position, adapting to different sizes of electric drive axle housings and improving the overall applicability of the device. The tensioning threaded rod is stably fixed by symmetrically distributed locking nuts and the self-locking thread between the adjustment sleeve and the tensioning threaded rod.

[0013] 2. Slide the mounting plate vertically along the tensioning threaded rod with the positioning hole to ensure that the extrusion plate can be aligned with the appropriate position of the side of the electric drive axle housing, and adjust the horizontal position of the extrusion plate through the rotationally symmetrically distributed adjustment threaded rods, and squeeze the electric drive axle housing into position through the symmetrically distributed extrusion plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0016] Figure 3 This is a schematic side cross-sectional structure diagram of the first track window, movable panel and second track window of the present invention;

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the mounting plate of the utility model when viewed from above.

[0018] In the figure: 1. Fixed plate; 2. Tightening bolt; 3. Support plate; 4. Gasket cover; 5. Gasket body; 6. Screw; 7. First track window; 8. Movable plate; 9. Side threaded rod; 10. Adjusting sleeve; 11. Tensioning threaded rod; 12. Second track window; 13. Locking nut; 14. Positioning hole; 15. Mounting plate; 16. Adjusting threaded rod; 17. Extrusion plate; 18. Tensioning block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-4, the present utility model provides a technical solution: a shaft end sealing tooling for airtightness detection of an electric drive axle housing, including a fixing plate 1, a tightening bolt 2, a support plate 3, a gasket cover 4, a gasket body 5, a screw 6, a first track window 7, a movable plate 8, a side threaded rod 9, an adjusting sleeve 10, a tensioning threaded rod 11, a second track window 12, a locking nut 13, a positioning hole 14, a mounting plate 15, an adjusting threaded rod 16, a pressing plate 17 and a tensioning block 18. A tightening bolt 2 is threadedly installed at the center of the fixing plate 1, the top end of the tightening bolt 2 is in contact with the center of the bottom surface of the support plate 3, the support plate 3 is fixedly installed at the center of the bottom surface of the gasket cover 4, a gasket body 5 is installed on the top surface of the gasket cover 4, a screw 6 is installed at the center of the gasket body 5, a first track window 7 is opened at the end of the gasket cover 4, a movable plate 8 is installed in the first track window 7, one side of the movable plate 8 is rotatably installed with a side threaded rod 9 through a bearing seat, the side threaded rod 9 penetrates through the end of the gasket cover 4, the center of the movable plate 8 is penetrated and installed with an adjusting sleeve 10 through a bearing seat, the center of the adjusting sleeve 10 is penetrated and installed with a tensioning threaded rod 11, one end of the tensioning threaded rod 11 penetrates through the second track window 12, the second track window 12 is opened at the end of the fixing plate 1, a locking nut 13 is installed at one end of the tensioning threaded rod 11, a tensioning block 18 is fixedly installed at the other end of the tensioning threaded rod 11, the tensioning threaded rod 11 penetrates through the positioning hole 14, the positioning hole 14 is opened at the center of the mounting plate 15, an adjusting threaded rod 16 is threadedly installed through the end of the mounting plate 15, and the end of the adjusting threaded rod 16 is rotatably connected to one side of the pressing plate 17 through a bearing seat.

[0021] In this example, both the first track window 7 and the movable plate 8 are symmetrically distributed about the center of the gasket cover 4, and the movable plate 8 is slidably connected to the first track window 7. The above structural design enables the movable plate 8 to slide along the first track window 7 to adjust the use spacing.

[0022] The side view section of the movable plate 8 is "I"-shaped, the center of the movable plate 8 and the center of the side threaded rod 9 are on the same vertical plane, and the side threaded rod 9 is threadedly connected to the hole opened on the side wall of the first track window 7 at the end of the gasket cover 4. The above structural design enables the movable plate 8 not to separate from the gasket cover 4, and when the side threaded rod 9 rotates and moves in the hole opened on the side wall of the first track window 7, it can drive the movable plate 8 to move stably horizontally.

[0023] The front view section of the adjusting sleeve 10 is "丄"-shaped, and the adjusting sleeve 10 is threadedly connected to the tensioning threaded rod 11. The above structural design enables the adjusting sleeve 10 to be conveniently operated and uses the threaded connection relationship to stably drive and lock the tensioning threaded rod 11.

[0024] The locking nuts 13 are symmetrically distributed above and below the center of the second track window 12. The second track window 12 is slidingly connected to the tensioning threaded rod 11. The above structural design enables the tensioning threaded rod 11 to slide horizontally along the second track window 12, and the bottom end of the tensioning threaded rod 11 is conveniently locked with the fixing plate 1 through the locking nut 13.

[0025] The adjusting threaded rod 16 is symmetrically distributed about the center of the extrusion plate 17. The center of the extrusion plate 17 and the center of the positioning hole 14 are on the same vertical plane. The positioning hole 14 is slidingly connected to the tensioning threaded rod 11. The above structural design enables the mounting plate 15 to slide along the tensioning threaded rod 11 with the positioning hole 14 to adjust the working position. The adjusting threaded rod 16 can also adjust the horizontal working position of the extrusion plate 17 by screwing in.

[0026] Working principle: When using this device, first Figure 2 The symmetrically distributed locking nuts 13 are rotated away from the upper and lower surfaces of the end of the fixed plate 1, and the side threaded rods 9 are screwed outward from the holes opened on the side walls of the first track window 7. Under the action of the end bearing seat, the side threaded rods 9 drive the movable plate 8, the adjusting sleeve 10 and the tightening threaded rods 11 to slide along the first track window 7 away from the center of the sealing gasket cover 4 until the spacing between the symmetrically distributed tightening threaded rods 11 and the tightening block 18 is appropriate;

[0027] Then fit the end of the electric drive axle housing to the surface of the sealing gasket body 5, fit the tensioning block 18 to the protruding portion of the outer wall of the electric drive axle housing, screw the side threaded rod 9 into the hole opened on the side wall of the first track window 7, and slide the movable plate 8, the adjusting sleeve 10 and the tensioning threaded rod 11 along the first track window 7 close to the center of the sealing gasket cover 4 until the tensioning block 18 fits a larger area of ​​the protruding portion of the outer wall of the electric drive axle housing;

[0028] The adjusting threaded rods 16 are rotated symmetrically and screwed into the mounting plate 15 to push the extrusion plate 17 into contact with the outer wall of the electric drive axle housing. When the adjusting threaded rods 16 are stopped, the horizontal positions of the adjusting threaded rods 16 and the extrusion plate 17 are fixed by thread self-locking.

[0029] Then, the symmetrically distributed adjusting sleeve 10 is rotated, and the adjusting sleeve 10 drives the tightening threaded rod 11 to move upward with the movable plate 8 and the sealing gasket cover 4 close to the tightening block 18. Under the blocking effect of the extrusion plate 17 and the outer wall of the electric drive axle housing, the tightening threaded rod 11 cannot rotate, and the sealing gasket body 5 squeezes the end opening of the electric drive axle housing and makes the tightening block 18 fit more tightly with the protruding part of the outer wall of the electric drive axle housing. Stop rotating the adjusting sleeve 10, screw up the tightening bolt 2 and squeeze it tightly with the support plate 3, and the symmetrically distributed locking nut 13 squeezes the upper and lower end faces of the fixing plate 1 to further lock the tightening threaded rod 11 to ensure the stability of the overall installation of the tooling. This is the working principle of the shaft end sealing tooling for air tightness detection of the electric drive axle housing.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shaft end sealing tool for testing the air tightness of an electric drive axle housing, comprising a fixing plate (1), characterized in that: A tightening bolt (2) is installed at the center of the fixing plate (1) by threading. The top end of the tightening bolt (2) is in contact with the center of the bottom surface of the support plate (3). The support plate (3) is fixedly installed at the center of the bottom surface of the gasket cover (4). A gasket body (5) is installed on the top surface of the gasket cover (4). A screw (6) is installed at the center of the gasket body (5). A first track window (7) is opened at the end of the gasket cover (4). A movable plate (8) is installed in the first track window (7). One side of the movable plate (8) is rotatably installed with a side threaded rod (9) through a bearing seat. The side threaded rod (9) penetrates through the end of the gasket cover (4). A regulating sleeve (10) is installed through the center of the movable plate (8) through a bearing seat. A tensioning threaded rod (11) is installed through the center of the regulating sleeve (10). One end of the tensioning threaded rod (11) penetrates through a second track window (12). The second track window (12) is opened at the end of the fixing plate (1). A locking nut (13) is installed at one end of the tensioning threaded rod (11). A tensioning block (18) is fixedly installed at the other end of the tensioning threaded rod (11). The tensioning threaded rod (11) penetrates through a positioning hole (14). The positioning hole (14) is opened at the center of the mounting plate (15). An adjusting threaded rod (16) is installed through the thread at the end of the mounting plate (15). The end of the adjusting threaded rod (16) is rotatably connected to one side of the pressing plate (17) through a bearing seat.

2. The shaft end sealing tool for testing the air tightness of an electric drive axle housing according to claim 1, characterized in that: Both the first track window (7) and the movable plate (8) are symmetrically distributed about the center of the gasket cover (4). The movable plate (8) is in sliding connection with the first track window (7).

3. The shaft end sealing tool for testing the air tightness of an electric drive axle housing according to claim 1, characterized in that: The side view cross-section of the movable plate (8) is in the shape of "I". The center of the movable plate (8) and the center of the side threaded rod (9) are on the same vertical plane. The side threaded rod (9) is in threaded connection with the hole opened on the side wall of the first track window (7) at the end of the gasket cover (4).

4. The shaft end sealing tool for testing the air tightness of an electric drive axle housing according to claim 1, characterized in that: The front view cross-section of the regulating sleeve (10) is in the shape of "丄". The regulating sleeve (10) is in threaded connection with the tensioning threaded rod (11).

5. The shaft end sealing tool for testing the air tightness of an electric drive axle housing according to claim 1, characterized in that: The locking nuts (13) are symmetrically distributed above and below the center of the second track window (12). The second track window (12) is in sliding connection with the tensioning threaded rod (11).

6. The shaft end sealing tool for testing the air tightness of an electric drive axle housing according to claim 1, characterized in that: The adjusting threaded rods (16) are symmetrically distributed about the center of the pressing plate (17). The center of the pressing plate (17) and the center of the positioning hole (14) are on the same vertical plane. The positioning hole (14) is in sliding connection with the tensioning threaded rod (11).

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