A dust cover for an automobile steering intermediate shaft and its sealing structure

Abstract

The present invention discloses a dust cover for an automobile steering intermediate shaft and a sealing structure thereof, and relates to the technical field of dust covers; in order to solve the problems of inconvenient disassembly, assembly and maintenance of the dust cover and insufficient installation sealing; the dust cover comprises a vehicle body panel, an intermediate shaft body arranged on the inner wall of the vehicle body panel and a dust cover body arranged on the inner wall of the vehicle body panel, and the outer wall of the intermediate shaft body is arranged on the circumferential inner wall of the dust cover body, and the dust cover body is provided with a sealing head. The sealing structure of the dust cover comprises a ring-shaped sleeve fixedly connected to one end of the cylinder, a slot arranged on the circumferential outer wall of the sleeve in a ring array, a connection port arranged at one end of the sealing cover, and one end of the sleeve is arranged on the inner wall of the connection port. The present invention completes the rapid assembly of the dust cover body, improves the tightness of the connection between the dust cover body and the vehicle body panel, prevents dust, water, etc. from entering the vehicle compartment from the vehicle chassis, and also prevents the connection between the two from loosening due to the vibration of the vehicle body.

Description

Technical Field

[0001] The invention relates to the technical field of dust covers, in particular to a dust cover for an automobile steering intermediate shaft and a sealing structure thereof. Background Art

[0002] The current automotive steering system generally arranges the steering gear (steering machine) in the engine compartment, and connects it to the steering wheel in the cockpit through a steering drive shaft (steering column) passing through the engine compartment. In order to meet the requirements of appearance and NVH performance in the cockpit, it is generally necessary to provide a steering shaft dust cover at the position where the steering shaft passes through the hole in the bottom plate of the vehicle body to block the gap left by the steering column passing through the engine compartment and the cockpit, thereby preventing dust and mud from the bottom of the vehicle from entering the cockpit, and at the same time preventing noise in the engine compartment from being transmitted into the cockpit.

[0003] After searching, the Chinese patent application number CN201420395448.3 discloses a dust cover for automobile steering shaft, which has a dust cover body, an elastic pressing sheet and an anti-slip clip; the outline size of the elastic pressing sheet is similar to the bottom edge of the dust cover body, and the elastic pressing sheet and the bottom edge of the dust cover body have at least two corresponding through holes, which correspond to the connection holes on the front wall plate, and the elastic pressing sheet and the bottom edge of the dust cover body are installed on the front wall plate by the anti-slip clip; the elastic pressing sheet is an annular curved thin sheet, and the elastic pressing sheet fits the bottom edge of the dust cover body. The automobile steering shaft dust cover in the above patent has the following shortcomings: the bottom edge of the dust cover body is fixed to the front wall plate by the clip, and the clip is easy to fall off after a long time of use, and dust and other powder impurities are easy to penetrate into the connection from the edge gap of the elastic pressing sheet away from the clip, thereby affecting the sealing effect, so there are defects such as inconvenient disassembly and maintenance of the dust cover and insufficient installation sealing. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a dust cover for an automobile steering intermediate shaft and a sealing structure thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A dust cover for an automobile steering intermediate shaft, comprising a vehicle body panel, an intermediate shaft body arranged on the inner wall of the vehicle body panel, and a dust cover body arranged on the inner wall of the vehicle body panel, wherein the outer wall of the intermediate shaft body is arranged on the circumferential inner wall of the dust cover body, and the dust cover body is composed of a sealing head, a cylinder body fixedly connected to one end of the sealing head, and a sealing cover fixed to one end of the cylinder body through a sealing structure;

[0007] The inner wall of the cylinder is hollow, and a dust suction portion is provided on the circumferential inner wall of the cylinder; a collar is fixedly connected to the circumferential outer wall of the intermediate shaft body within the enveloping range of the dust cover body, and an arc block is fixedly connected to the circumferential outer wall of the collar.

[0008] Preferably: a sealing gasket A is fixedly connected to one end of the sealing head; and a sealing gasket B is provided on the circumferential outer wall of the cylinder body close to the sealing cover.

[0009] Preferably: the sealing structure includes a ring-shaped sleeve fixedly connected to one end of the cylinder, a groove arranged in a ring array on the outer wall of the sleeve, a connecting port arranged at one end of the cover, and one end of the sleeve is arranged on the inner wall of the connecting port.

[0010] Preferably: a tightening ring is provided on the circumferential outer wall of the sleeve, and the tightening ring is made of elastic material;

[0011] The circumferential inner wall of the tightening ring is fixedly connected with clamping blocks having the same number as the clamping slots in an annular array, and the clamping blocks match the clamping slots.

[0012] Preferably: one end of the sealing head and the sealing cover are both fixedly connected with a metal ring, the circumferential inner wall of the metal ring is rotatably connected with a connecting ring, and the circumferential inner wall of the connecting ring is fixedly connected to the circumferential outer wall of the intermediate shaft body.

[0013] Preferably, the inner diameter of the cylinder is greater than the outer diameter of the intermediate shaft body.

[0014] Preferably: the dust suction part includes a buffer balloon fixedly connected to the circumferential inner wall of the cylinder, a top column fixedly connected to the inner wall of the buffer balloon, a connecting plate fixedly connected to one end of the top column, a piston column fixedly connected to a side surface of the connecting plate, a sleeve arranged on the outer wall of the piston column, and a through hole arranged on the circumferential inner wall of the cylinder, and the outer wall of the top column and the inner wall of the cylinder form a sliding fit, and one end of the sleeve is fixedly connected to the inner side surface of the cylinder.

[0015] Preferably, the through hole is connected to the sleeve, and the diameter of the through hole is 1 / 2 or 1 / 3 of the inner diameter of the sleeve.

[0016] Preferably, a feeding port is provided on the circumferential outer wall of the sleeve close to one end.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention is provided with a sealing structure. The sealing cover is taken out and the connecting port is adjusted to align with the sleeve and then screwed in, so that the sealing cover and the cylinder body are integrated. Then the tightening ring is expanded and sleeved on the outer wall of the sleeve. The clamping block on it is adjusted and inserted into the clamping groove at the corresponding position. The tightening ring will automatically tighten and firmly adhere to the sleeve, thereby completing the rapid assembly of the dust cover body. In addition, the tightening ring can make the two side surfaces of the tightening ring respectively abut against one end surface of the sealing cover and the sealing gasket B, so that one side of the sealing gasket A and the sealing gasket B are squeezed to fit firmly on both sides of the vehicle body panel, thereby improving the tightness of the connection between the dust cover body and the vehicle body panel, preventing dust, water, etc. from entering the vehicle compartment from the chassis of the vehicle, and also preventing the connection between the two from loosening due to the vibration of the vehicle body.

[0019] 2. The dust cover body of the present invention wraps around the outer wall of the intermediate shaft body and is fixedly assembled in the vehicle body panel, tightly blocking the gap at the connection between the intermediate shaft body and the vehicle body panel to prevent dust and muddy water raised from the bottom of the vehicle from splashing into the vehicle compartment; the connecting ring is fixed to the outer wall of the intermediate shaft body, and rotates with the turning of the intermediate shaft body, thereby ensuring the sealing of the connection and avoiding deformation of the head and cover.

[0020] 3. The present invention is provided with a dust suction part. When the arc block contacts the buffer balloon and squeezes it to contract, the top column will move backward in the cylinder, and then the supporting connecting plate will drive the piston column to move backward in the sleeve, so that the powder impurities at the gap between the intermediate shaft body and the cylinder will quickly enter the sleeve from the through hole under the drive of adsorption force, until one end of the piston column moves backward and abuts against one end face of the inner wall of the sleeve, and the discharge port is exposed, so that the inside of the sleeve becomes a normal pressure state, and then the powder impurities entering the sleeve fall into the cylinder through the discharge port, and automatically slide to the bottom distance under the influence of their own weight, so as to make them away from the discharge port, thereby completing the work of automatically collecting the powder impurities that have penetrated into the gap, and further preventing the powder impurities from entering the car.

[0021] 4. In the present invention, since the aperture of the through hole is smaller than the inner diameter of the sleeve, when the piston column moves backward rapidly, a short negative pressure can be formed in the sleeve, so as to absorb the powder impurities in the gap between the intermediate shaft body and the cylinder body into the sleeve; when the steering wheel controls the rotation of the intermediate shaft body, the collar drives the arc block thereon to make a circular motion as the intermediate shaft body rotates, so as to occasionally abut the buffer balloon to cause it to be compressed and deformed, thereby providing power support for cleaning the powder impurities inside the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of an automobile steering intermediate shaft dust cover and a sealing structure thereof in assembly and use state proposed by the present invention;

[0023] Figure 2 This is a schematic diagram of the explosion structure of a dust cover body of a dust cover for an automobile steering intermediate shaft proposed by the present invention;

[0024] Figure 3 This is a schematic diagram of the front structure of a dust cover body of a dust cover for an automobile steering intermediate shaft proposed by the present invention;

[0025] Figure 4 This is a schematic diagram of the back structure of a dust cover body of a dust cover for an automobile steering intermediate shaft proposed by the present invention;

[0026] Figure 5 This is a schematic diagram of the cross-sectional structure of a cylinder end face of a dust cover for an automobile steering intermediate shaft proposed by the present invention;

[0027] Figure 6 This is a schematic diagram of the intermediate shaft body structure proposed by the present invention.

[0028] In the figure: 1 body plate, 2 intermediate shaft body, 3 dust cover body, 301 cover, 302 head, 303 sealing gasket A, 304 cylinder, 305 sealing gasket B, 306 sleeve, 307 tightening ring, 308 connecting port, 309 block, 310 slot, 311 buffer balloon, 312 connecting ring, 313 through hole, 314 feeding port, 315 connecting plate, 316 top column, 317 sleeve, 318 collar, 319 arc block. DETAILED DESCRIPTION

[0029] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0032] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0033] Embodiment 1:

[0034] A dust cover for an automobile steering intermediate shaft, such as Figure 1-3 As shown, it includes a body panel 1, an intermediate shaft body 2 inserted into the inner wall of the body panel 1, and a dust cover body 3 assembled on the inner wall of the body panel 1, and the outer wall of the intermediate shaft body 2 is inserted into the circumferential inner wall of the dust cover body 3; the dust cover body 3 wraps the outer wall of the intermediate shaft body 2 and is fixedly assembled in the body panel 1, and the gap at the connection between the intermediate shaft body 2 and the body panel 1 is tightly blocked to prevent dust and mud and water raised from the bottom of the vehicle from splashing into the vehicle compartment.

[0035] The dust cover body 3 is composed of a head 302, a cylinder 304 welded to one end of the head 302, and a cover 301 fixed to one end of the cylinder 304 through a sealing structure. Preferably, the inner diameter of the cylinder 304 is greater than the outer diameter of the intermediate shaft body 2 to avoid friction between the two during steering operation.

[0036] Preferably, the sealing head 302 and the sealing cover 301 may be made of rubber or hard materials, and the hard materials include metal materials and the like.

[0037] Furthermore, one end of the head 302 and the cover 301 are welded with a metal ring, the circumferential inner wall of the metal ring is rotatably connected to a connecting ring 312, and the circumferential inner wall of the connecting ring 312 is fixedly connected to the circumferential outer wall of the intermediate shaft body 2; so that the connecting ring 312 can rotate with the turning of the intermediate shaft body 2, and at the same time, deformation of the head 302 and the cover 301 can be avoided.

[0038] In order to facilitate the cleaning of dust infiltrated into the dust cover body 3; Figure 3-6 As shown, the inner circumferential wall of the cylinder 304 located in the horizontal relative direction is provided with two dust suction parts with the same structure, and the dust suction parts include a buffer balloon 311 welded to the inner circumferential wall of the cylinder 304, a top column 316 welded to the inner wall of the buffer balloon 311, a connecting plate 315 welded to one end of the top column 316, a piston column welded to one side of the connecting plate 315, a sleeve 317 sleeved on the outer wall of the piston column, and a through hole 313 opened on the inner circumferential wall of the cylinder 304, and the outer wall of the top column 316 and the inner wall of the cylinder 304 form a sliding fit, and one end of the sleeve 317 is welded to the inner side surface of the cylinder 304;

[0039] Preferably, the through hole 313 is connected with the sleeve 317, and the aperture of the through hole 313 is 1 / 2 or 1 / 3 of the inner diameter of the sleeve 317. When the air is pumped, since the aperture of the through hole 313 is smaller than the inner diameter of the sleeve 317, when the piston column moves backward rapidly, a short negative pressure can be formed in the sleeve 317, so as to absorb the powder impurities in the gap between the intermediate shaft body 2 and the cylinder body 304 into the sleeve 317;

[0040] Furthermore, the inner wall of the cylinder 304 is hollow; a feed opening 314 is provided on the circumferential outer wall of the sleeve 317 near one end;

[0041] A collar 318 is sleeved on the circumferential outer wall of the intermediate shaft body 2 within the coverage of the dust cover body 3, and an arc block 319 is welded on the circumferential outer wall of the collar 318; when the steering wheel controls the intermediate shaft body 2 to rotate, the collar 318 drives the arc block 319 thereon to make a circular motion as the intermediate shaft body 2 rotates, so as to occasionally abut against the buffer balloon 311 to cause it to be compressed and deformed, thereby providing power support for cleaning the powder impurities inside the cylinder 304.

[0042] When the arc block 319 rotates under the drive of the intermediate shaft body 2 through the collar 318, when it contacts the buffer balloon 311 and squeezes it to shrink, the top column 316 moves backward in the cylinder 304, and then the supporting connecting plate 315 drives the piston column to move backward in the sleeve 317, so that the powder impurities in the gap between the intermediate shaft body 2 and the cylinder 304 quickly enter the sleeve 317 from the through hole 313 under the drive of the adsorption force, until one end of the piston column moves backward and abuts against one end face of the inner wall of the sleeve 317, the discharge port 314 is exposed, so that the inside of the sleeve 317 becomes a normal pressure state , which causes the powder impurities entering the sleeve 317 to fall into the cylinder 304 through the discharge port 314, and automatically slide to the bottom distance under the influence of its own weight, thereby moving away from the discharge port 314; when the arc block 319 is driven to no longer abut the buffer balloon 311, the elastic potential energy of the buffer balloon 311 will drive the top column 316 to reset. Since the impurities in the sleeve 317 have fallen, the collected powder impurities will not fall back into the gap between the intermediate shaft body 2 and the cylinder 304, thereby completing the work of automatically collecting the powder impurities that have penetrated into the gap.

[0043] When the embodiment is in use, the dust cover body 3 wraps the outer wall of the intermediate shaft body 2 and is fixedly assembled in the vehicle body panel 1, so as to tightly block the gap at the connection between the intermediate shaft body 2 and the vehicle body panel 1; during driving, when the steering wheel controls the rotation of the intermediate shaft body 2, the connecting ring 312 rotates with the rotation of the intermediate shaft body 2, thereby ensuring the sealing of the connection and preventing the head 302 and the cover 301 from being deformed;

[0044] The dust that has infiltrated into the gap between the intermediate shaft body 2 and the cylinder 304 can be automatically cleaned by the dust suction part. The specific operation is as follows: the collar 318 drives the arc block 319 thereon to make a circular motion as the intermediate shaft body 2 rotates. When the arc block 319 contacts the buffer balloon 311 and squeezes it to shrink, the top column 316 moves backward in the cylinder 304, and then the supporting connecting plate 315 drives the piston column to move backward in the sleeve 317, so that the powder impurities in the gap between the intermediate shaft body 2 and the cylinder 304 quickly enter the sleeve 317 from the through hole 313 under the drive of the adsorption force until one end of the piston column is When it moves backward to abut one end face of the inner wall of the sleeve 317, the discharge port 314 is exposed, so that the interior of the sleeve 317 becomes a normal pressure state, which causes the powder impurities entering the sleeve 317 to fall into the cylinder 304 through the discharge port 314, and automatically slide to the bottom distance under the influence of its own weight, thereby moving away from the discharge port 314; when the arc block 319 is driven to no longer abut the buffer balloon 311, the elastic potential energy of the buffer balloon 311 will drive the top column 316 to reset. Since the impurities in the sleeve 317 have fallen, the collected powder impurities will not fall back into the gap between the intermediate shaft body 2 and the cylinder 304 again.

[0045] Embodiment 2:

[0046] A sealing structure for a dust cover of an automobile steering intermediate shaft, such as Figure 2 and Figure 4 As shown, in order to improve the tightness of the connection between the dust cover body 3 and the vehicle body panel 1 and prevent dust, water, etc. from entering the vehicle compartment from the vehicle chassis; the sealing structure includes a ring-shaped sleeve 306 welded to one end of the cylinder 304, a plurality of slots 310 arranged in a ring array on the outer wall of the sleeve 306, and a connection port 308 arranged at one end of the cover 301, and one end of the sleeve 306 is connected to the inner wall of the connection port 308 by a thread;

[0047] Furthermore, the outer circumferential wall of the sleeve 306 is sleeved with a tightening ring 307, and the tightening ring 307 is made of elastic material; the inner circumferential wall of the tightening ring 307 is welded with the same number of blocks 309 as the slots 310 in an annular array, and the blocks 309 match the slots 310;

[0048] During assembly, first insert the intermediate shaft body 2 into the dust cover body 3 and then assemble it on the car. Then insert the cylinder 304 into the hole reserved in the body plate 1. Put the sealing gasket B305 on the outer wall of the cylinder 304 so that one end abuts against one side of the body plate 1. Then take out the cover 301 and adjust the connection port 308 to align with the sleeve 306 and then screw it in, so that the cover 301 and the cylinder 304 form a whole. Finally, expand the tightening ring 307 and put it on the outer wall of the sleeve 306. Adjust the clamping block 309 on it and insert it into the corresponding position of the clamping slot 309. 10, the tightening ring 307 will automatically tighten and firmly adhere to the sleeve head 306, thereby completing the rapid assembly of the dust cover body 3, and the tightening ring 307 can make the two side surfaces of the tightening ring 307 respectively abut against the cover 301 and one end surface of the sealing gasket B305, thereby squeezing the sealing gasket A303 and one side of the sealing gasket B305 to fit firmly on both sides of the vehicle body panel 1, which improves the tightness of the connection between the dust cover body 3 and the vehicle body panel 1, and also prevents the connection between the two from loosening due to the vibration of the vehicle body.

[0049] Preferably, in order to improve the tightness of the connection between the dust cover body 3 and the vehicle body panel 1, a sealing gasket A303 is welded on one end of the sealing head 302; a sealing gasket B305 is sleeved on the circumferential outer wall of the cylinder 304 close to the sealing cover 301;

[0050] When assembling this embodiment, the intermediate shaft body 2 is first inserted into the dust cover body 3 and then assembled on the car, and then the cylinder 304 is inserted into the hole reserved in the body panel 1, and the sealing gasket B305 is sleeved on the outer wall of the cylinder 304 so that one end thereof abuts against one side of the body panel 1, and then the cover 301 is taken out and the connection port 308 is adjusted to align with the sleeve 306 and then screwed in, so that the cover 301 and the cylinder 304 form a whole, and finally the tightening ring 307 is expanded and sleeved on the outer wall of the sleeve 306, and the clamping block 309 thereon is adjusted to be inserted into the clamping groove 310 at the corresponding position, and the tightening ring 307 is automatically tightened so as to be firmly attached to the sleeve 306, so that the two side surfaces of the tightening ring 307 abut against the cover 301 and one end surface of the sealing gasket B305 respectively, thereby squeezing the sealing gasket A303 and one side surface of the sealing gasket B305 to fit firmly on both sides of the body panel 1.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dust cover for an automobile steering intermediate shaft, comprising a vehicle body panel (1), an intermediate shaft body (2) arranged on the inner wall of the vehicle body panel (1), and a dust cover body (3) arranged on the inner wall of the vehicle body panel (1), wherein the outer wall of the intermediate shaft body (2) is arranged on the circumferential inner wall of the dust cover body (3), characterized in that: The dust cover body (3) is composed of a sealing head (302), a cylinder (304) fixedly connected to one end of the sealing head (302), and a sealing cover (301) fixed to one end of the cylinder (304) through a sealing structure; the inner wall of the cylinder (304) is hollow, and a dust suction portion is provided on the circumferential inner wall of the cylinder (304); the circumferential outer wall of the intermediate shaft body (2) within the enveloping range of the dust cover body (3) is fixedly connected to a collar (318), and the circumferential outer wall of the collar (318) is fixedly connected to the outer wall of the intermediate shaft body (2). An arc block (319) is connected; one end of the sealing head (302) is fixedly connected to a sealing gasket A (303); a sealing gasket B (305) is arranged on the circumferential outer wall of the cylinder (304) close to the sealing cover (301); the sealing structure comprises a ring-shaped sleeve (306) fixedly connected to one end of the cylinder (304), a groove (310) arranged in an annular array on the circumferential outer wall of the sleeve (306), and a connecting port (308) arranged at one end of the sealing cover (301), and the sleeve ( One end of the sleeve (306) is arranged on the inner wall of the connecting port (308); a tightening ring (307) is arranged on the circumferential outer wall of the sleeve (306), and the tightening ring (307) is made of elastic material; the circumferential inner wall of the tightening ring (307) is fixedly connected with the same number of blocks (309) as the card slots (310) in an annular array, and the blocks (309) match the card slots (310); the dust suction part includes a buffer balloon (311) fixedly connected to the circumferential inner wall of the cylinder (304), A top column (316) fixedly connected to the inner wall of the buffer balloon (311), a connecting plate (315) fixedly connected to one end of the top column (316), a piston column fixedly connected to one side of the connecting plate (315), a sleeve (317) arranged on the outer wall of the piston column, and a through hole (313) arranged on the circumferential inner wall of the cylinder (304), wherein the outer wall of the top column (316) and the inner wall of the cylinder (304) form a sliding fit, and one end of the sleeve (317) is fixedly connected to the inner side surface of the cylinder (304); During assembly, the intermediate shaft body (2) is first inserted into the dust cover body (3) and then assembled on the automobile. The cylinder body (304) is then inserted into the hole provided in the vehicle body panel (1). The sealing gasket B (305) is sleeved on the outer wall of the cylinder body (304) so ​​that one end thereof abuts against one side of the vehicle body panel (1). The sealing cover (301) is then taken out and the connection port (308) is adjusted to align with the sleeve (306) and then screwed in so that the sealing cover (301) and the cylinder body (304) form a whole. Finally, the tightening ring (307) is expanded and sleeved on the outer wall of the sleeve (306). The clamping block (309) thereon is adjusted and inserted into the corresponding position of the clamping groove (310). The tightening ring (307) is automatically tightened so as to be firmly attached to the sleeve (306), thereby completing the rapid assembly of the dust cover body (3). When the steering wheel controls the intermediate shaft body (2) to rotate, the collar (318) rotates along with the intermediate shaft body (2) and drives the arc-shaped block (319) thereon to make a circular motion.

2. The dust cover of the automobile steering intermediate shaft according to claim 1, characterized in that: One end of the sealing head (302) and the sealing cover (301) are both fixedly connected to a metal ring, the circumferential inner wall of the metal ring is rotatably connected to a connecting ring (312), and the circumferential inner wall of the connecting ring (312) is fixedly connected to the circumferential outer wall of the intermediate shaft body (2).

3. The dust cover of the automobile steering intermediate shaft according to claim 2, characterized in that: The inner diameter of the cylinder (304) is greater than the outer diameter of the intermediate shaft body (2).

4. The dust cover of the automobile steering intermediate shaft according to claim 3, characterized in that: The through hole (313) is connected to the sleeve (317), and the diameter of the through hole (313) is 1 / 2 or 1 / 3 of the inner diameter of the sleeve (317).

5. The dust cover of the automobile steering intermediate shaft according to claim 4, characterized in that: A feeding port (314) is provided on the circumferential outer wall of the sleeve (317) near one end.

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