CN113048159A - Anti-falling type dust cover for drive shaft universal joint and transmission assembly - Google Patents

Abstract

The invention discloses a dust cover for a universal joint of an anti-falling driving shaft and a transmission assembly, wherein the dust cover is used on a transmission joint, the transmission joint comprises a female part positioned at the end part of an input shaft and a male part positioned at the end part of an output shaft, the female part comprises a shell, the male part comprises a rolling bearing, the rolling bearing comprises a plurality of rollers, and the rollers are inserted into the shell through the open end of the shell of the female part; the dust cover includes the main part, and the main part includes first open end, ripple barrel, linkage segment and the open end of second in proper order, and the opening of first open end is less than the opening of the open end of second, and the first open end of dust cover is fixed on the output shaft, and the open end of second of dust cover is fixed on female. The dust cover is simple in structure, and the weight of the dust cover is effectively reduced.

Description

Anti-falling type dust cover for drive shaft universal joint and transmission assembly

Technical Field

The present invention relates to a transmission joint, and more particularly, to a dust cover for a slip-proof drive shaft universal joint and a transmission assembly.

Background

The drive shaft is connected between a gear box and a wheel of the motor vehicle, the drive shaft comprises a fixed end and a telescopic end, the end connected with the gear box is the telescopic end, and the end connected with a hub of the wheel is the fixed end. The telescoping end of the driveshaft includes an input shaft, an output shaft, and a driveshaft joint (also known as a constant velocity joint, abbreviated CVJ) connecting the input shaft and the output shaft. The driveshaft adapter includes a female member at an end of the input shaft and a male member at an end of the output shaft. The female part of the input shaft end comprises a housing, which may be a three-cylinder housing, and the male part of the output shaft end comprises a rolling bearing adapted to be inserted into the housing via an open end of the housing of the female part. Power is transmitted to the gear box from the engine or the motor, is transmitted to the input shaft and the female part through the gear box, is transmitted to the male part through the female part, and rotates at the same speed with the male part. The male part is also able to slide axially and oscillate angularly inside the female part, the rolling bearing of the male part rolling when the male part slides with respect to the female part. The pivot angle of the male part and the female part is generally between 0 ° and 25 °.

Generally, the function of dust Boots (the english name Boots) is to protect the drive shaft joints from the ingress of muddy water, sand and/or any other contaminants; a closed space is formed so that grease does not leak in the space to sufficiently lubricate the operation between the bearing and the housing. The dust cap is generally in the shape of a hollow trumpet comprising a first open end, a bellows cylinder, a connecting section and a second open end, wherein the opening of the first open end is smaller than the opening of the second open end. After the dust cover is sleeved on the universal joint of the driving shaft, the opening of the first opening end of the dust cover is sleeved on the output shaft, and the opening of the second opening end of the dust cover is sleeved on the opening end of the female part shell.

The male part at the end of the output shaft comprises a rolling bearing comprising a plurality of wheel-shaped rollers, typically 3.

In the prior art, it is common for the dust cap to have a peripheral shoulder, the surface of which facing the second end of the dust cap is provided with angularly offset recesses open towards the second end, the interior of each recess forming a seat with a concave bearing surface adapted to receive the roller in partial interfitting fashion and to form a surface to receive the roller in pushing contact. However, the existing dust cover has a complex structure, a large volume, volume and mass, a long molding cycle, large internal stress, easy deformation and increased manufacturing cost.

Disclosure of Invention

The invention aims to provide a drop-proof dust cover for a drive shaft universal joint and a transmission assembly, so as to solve the technical problems mentioned in the background technology.

In order to achieve the above object, the present invention provides a dust cover for a drop-proof drive shaft universal joint and a transmission assembly, comprising:

a drop-proof dust cover for a universal joint of a drive shaft is used on a transmission joint, the transmission joint comprises a female part positioned at the end part of an input shaft and a male part positioned at the end part of an output shaft, the female part comprises a shell, the male part comprises a rolling bearing, the rolling bearing comprises a plurality of rollers, and the rollers are inserted into the shell through an open end of the shell of the female part;

the dust cover includes the main part, and the main part includes first open end, ripple barrel, linkage segment and the open end of second in proper order, and the opening of first open end is less than the opening of the open end of second, and the first open end of dust cover is fixed on the output shaft, and the open end of second of dust cover is fixed on female.

Furthermore, the dust cover still includes the stopper and the strengthening rib of being connected with the stopper, and the stopper setting is at the internal surface of linkage segment, and when the dust cover was in tensile state, the roller was arranged in the second open end and the outer lane cambered surface of roller contacted with the stopper, and the stopper prevents that the roller breaks away from the female member.

Furthermore, the stopper includes two sets at least, and every group stopper includes two at least, and the inner wall of linkage segment sets up a plurality of interval distribution's concave part and convex part, and every group stopper sets up respectively on the linkage segment of concave part department, and the stopper has with roller outer lane cambered surface assorted surface.

Further, along keeping away from ripple barrel direction, the thickness of stopper thins gradually, and the stopper is the wedge.

Furthermore, the limiting block with the surface back to the back is provided with a reinforcing rib, the reinforcing rib is fixedly connected with the inner wall of the connecting section, the reinforcing rib at least comprises one reinforcing rib, and when the second open end is fixed at the open end of the female part, the end face of the open end of the female part is in contact with or close to the reinforcing rib.

Furthermore, the axial length of the limiting block is greater than that of the reinforcing rib, when the second open end is fixed at the open end of the female part, the end part of the limiting block extends into the open end of the female part, and the limiting block is in contact with or close to the inner wall of the female part.

A transmission assembly includes a female member located at an end of an input shaft, a male member located at an end of an output shaft, and a dust cover for a dropout prevention type drive shaft universal joint, the female member including a housing, the male member including a rolling bearing, the rolling bearing including a plurality of rollers, inserted into the housing via an open end of the housing of the female member, a first open end of the dust cover fixed to the output shaft, and a second open end of the dust cover fixed to the female member.

Further, the outer wall edge of the second open end sets up the lug along circumference, and the lug includes at least three, sets up annular flange on the outer wall of the second open end with the linkage segment junction, when the second open end was fixed at female member open end, fixed through the clamp, the lug prevented with the flange that the clamp breaks away from.

Furthermore, the inner wall of the second open end is circumferentially provided with a convex rib, and the outer wall of the female open end is provided with a mounting groove matched with the convex rib.

Furthermore, the inner wall of the first open end is provided with an annular limiting edge, the output shaft is provided with a limiting groove matched with the limiting edge, the edge of the outer wall of the first open end is provided with a plurality of sections of flanges along the circumferential direction, and the clamp is clamped on the outer wall of the first open end.

The anti-drop dust cover for the universal joint of the driving shaft and the transmission assembly have the following advantages that:

according to the dust cover, the limiting block is directly arranged in the body, so that the weight of the dust cover can be effectively reduced, and when the male part moves towards the open end of the female part, the outer ring surface of the roller is in contact with the limiting block, so that on one hand, the roller is prevented from being separated from the female part; on the other hand, limit structure can play good cushioning effect, for public piece to keeping away from female member open end terminal surface and removing, releases locking force or frictional force in advance. The axial length of stopper is longer than the axial length of strengthening rib, and when the contact of roller outer lane face and stopper, the stopper compresses tightly female, prevents effectively that the roller from breaking away from.

Furthermore, the dust cover provided by the invention has the advantages that on the basis of the existing dust cover, the independent convex block is arranged on the outer wall of the second open end, so that the weight of the dust cover can be reduced.

Finally, the transmission assembly provided by the invention is simple in structure, firm in fixation, good in sealing performance and long in service life.

Drawings

FIG. 1 is a top view of the dust cap of the present invention;

FIG. 2 is a front view of the dust cap of the present invention;

FIG. 3 is a perspective view of the dust cap of the present invention;

FIG. 4 is a cross-sectional view of the dust cover in the transmission assembly in a stretched condition;

FIG. 5 is a detail view at A of FIG. 4;

FIG. 6 is a cross-sectional view of a dust cover in the transmission assembly in a compressed state.

The reference numbers in the figures illustrate: 1. an output shaft; 11. a roller; 2. a master; 21. an input shaft; 3. a main body; 31. a first open end; 32. a corrugated cylinder; 33. a second open end; 331. a projection; 332. a rib; 333. a bump; 334. a flange; 34. a connecting section; 4. a limiting block; 41. and (5) reinforcing ribs.

Detailed Description

In order to better understand the purpose, structure and function of the present invention, a dust cover for a slip-proof type drive shaft universal joint and a transmission assembly according to the present invention will be described in further detail with reference to the accompanying drawings.

The invention relates to a dust cover for a universal joint of a drop-proof driving shaft, which is used on a transmission joint, wherein the transmission joint comprises a female part 2 positioned at the end part of an input shaft 21 and a male part positioned at the end part of an output shaft 1, the female part 2 comprises a shell, and the shell can be a three-column groove shell. The male element comprises a rolling bearing comprising a plurality of rollers 11, inserted into the housing of the female element 2 via the open end of the latter. Female 2 can be crossed and can drive public piece constant speed rotation, and public piece can also be in female 2 internal axial slip with be the pivot angle motion, public when sliding for female 2, the antifriction bearing of public piece rolls.

As shown in fig. 1 to 3, the dust cover comprises a main body 3, the main body 3 comprises a first open end 31, a corrugated cylinder 32, a connecting section 34 and a second open end 33 in sequence, the opening of the first open end 31 is smaller than that of the second open end 33, the second open end 33 of the dust cover is fixed on the female member 2, and the first open end 31 of the dust cover is fixed on the mounting groove of the output shaft 1.

The dust cover still includes stopper 4, stopper 4 sets up on the internal surface of linkage segment 34, and when public spare moved extreme position to being close to female 2 open end terminal surface, the dust cover presented stretching state, and roller 11 is arranged in second open end 33 and the outer lane cambered surface of roller 11 contacts or is close with stopper 4, and stopper 4 prevents that roller 11 from breaking away from female 2, and stopper 4 and dust cover are through moulding plastics and blow molding technology integrated into one piece, greatly reduced dust cover's weight and shortened the shaping cycle time.

The inner wall of the second open end 33 of the dust cover is provided with a plurality of protrusions 331 distributed at intervals, the protrusions 331 divide the second open end 33 into a plurality of recesses and protrusions at intervals, the shape of the second open end 33 is identical to the shape of the outer wall of the open end of the female member 2, and as shown in fig. 1, the inner wall of the second open end 33 is provided with three recesses and three protrusions distributed at intervals. The connecting section 34 is also provided with a concave portion and a convex portion at a position corresponding to the second open end 33.

The limiting blocks 4 at least comprise two groups, each group of limiting blocks 4 at least comprises two groups, at least two limiting blocks 4 are respectively arranged on the connecting section 34 positioned in the concave part, and the limiting blocks 4 are provided with surfaces matched with the cambered surfaces of the outer rings of the rollers 11, wherein the surfaces can be planes or curved surfaces. As shown in fig. 1, the stoppers 4 include three groups, each group of stoppers 4 includes two stoppers 4, the two stoppers 4 are respectively disposed on the connecting section 34 at the junction of the concave part and the convex part, the thickness of the stoppers 4 is gradually reduced along the direction away from the corrugated cylinder 32, and the stoppers 4 are wedge-shaped blocks.

The limiting block 4 opposite to the surface is provided with at least one reinforcing rib 41, and the reinforcing rib 41 is fixedly connected with the inner wall of the connecting section 34. As shown in fig. 1, the dust cover includes two reinforcing ribs 41, the two reinforcing ribs 41 are parallel to each other and perpendicular to the plane connecting the limiting block 41, and the strength and rigidity of the limiting block 4 are enhanced by the arrangement of the reinforcing ribs 41.

When the second open end 33 is secured to the open end of the female member 2, the end surface of the open end of the female member 2 contacts or approaches the reinforcing rib 41, making the connecting section 34 of the dust cap stiffer with the second open end 33 and making the connection of the dust cap with the female member 2 more secure.

As shown in fig. 5, the axial length of the stopper 4 is greater than that of the reinforcing rib 41, when the second open end 33 is fixed at the open end of the female member 2, the end of the stopper 4 extends into the open end of the female member 2, the stopper 4 contacts or approaches the inner wall of the female member 2, when the dust cover in the transmission assembly is in a stretching state, the roller 11 contacts the stopper 4, the roller 11 presses the stopper 4, the stopper 4 presses the female member 2, and the roller 11 is effectively prevented from being disengaged from the female member 2.

The transmission assembly is capable of transmitting rotational motion of a shaft of the gear box to the wheel shaft in a vehicle transmission. As shown in fig. 4-6, the transmission assembly includes a female member 2 at the end of an input shaft 21, a male member at the end of an output shaft 1, and a dust cover as described above, the female member 2 including a housing, which may be a three-column housing. The male element comprises a rolling bearing comprising a plurality of rollers 11 adapted to be inserted into the housing of the female element 2 via the open end of the housing. Female 2 can drive public piece constant speed and rotate, and public piece can also be in female 2 axial slip and pivot angular motion, and public piece rolls for female 2 antifriction bearing of public piece when sliding, and the second open end 33 of dust cover is fixed on female 2, and the first open end 31 of dust cover is directly fixed on the mounting groove of output shaft 1.

The male rolling bearing comprises a plurality of rollers 11, where the rollers 11 may be wheel-shaped, the number of rollers 11 may be 3, and 3 rollers 11 are evenly distributed around the outer wall of the end of the output shaft 1 at intervals of 120 °. Each roller 11 has a front surface, a rear surface, and an outer peripheral surface interconnecting the front and rear surfaces. The rear surface of the roller 11 is the surface of the roller 11 facing the output shaft 1. The structure of the roller 11 is known in the art and will not be described in detail here.

When the female member 2 is rotated by the input shaft 21, this rotation is transmitted to the male member and the output shaft 1 through the rolling bearing, and the output shaft 1 is rotated at a constant speed.

The housing of the female part 2 comprises cylindrical protrusions in correspondence of the rollers 11 of the rolling bearing, between two adjacent cylindrical protrusions cylindrical recesses are provided. If the rolling bearing comprises 3 rollers 11, the housing comprises 3 cylindrical protrusions and 3 cylindrical recesses between the 3 cylindrical protrusions, respectively, also referred to as a three-cylinder housing. The inner side wall of each cylindrical boss forms a track extending in the axial direction of the housing, and the cross-sectional shape of the track is an arc complementary to the generating line of the rotation generating roller 11 about the central axis. Besides, the inner wall of the housing of the female member 2 depends on the installation condition of the roller 11.

The boot may be made of an elastomeric material, which may include a thermoplastic Elastomer (TPE), such as a thermoplastic PolyEster Elastomer (TPEE).

The inner wall of second open end 33 sets up bead 332 along circumference, sets up the mounting groove that matches with bead 332 on the outer wall of female member 2 open end, and during the installation, corresponding mounting groove can be arranged in to bead 332, and second open end 33 can overlap on the mounting groove of female member 2 open end, and the terminal surface contact of strengthening rib 41 and female member 2 open end or being close.

The edge of the outer wall of the second open end 33 is provided with at least three protrusions 333 along the circumferential direction, the outer wall of the second open end 33 at the connection with the bellows body 32 is provided with an annular flange 334, when the second open end 33 is fixed at the open end of the female member 2, the second open end is fixed by the clamp, and the clamp is effectively prevented from being separated by the protrusions 333 and the flange 334.

The inner wall of first open end 31 sets up spacing arris, set up on the output shaft 1 with spacing arris complex spacing groove, the outer wall edge of first open end 31 sets up the flange along circumference, the flange includes the multistage, multistage flange evenly distributed is on the outer wall of first open end 31, the clamp chucking is on the outer wall of first open end 31, thereby fix first open end 31 on output shaft 1, when first open end 31 passes through the clamp to be fixed on output shaft 1, promote firm degree and sealing performance greatly.

This dust cover can effectively lighten the weight of the dust cover by directly arranging the stopper 4 in the body, and on the basis of the existing dust cover, the independent projection 333 is arranged on the outer wall of the second open end 33, and the weight of the dust cover can be reduced. Meanwhile, when the male part moves towards the open end of the female part 2, the outer ring surface of the roller 11 is contacted with the limiting block 4, on one hand, the roller 11 is prevented from being separated from the female part 2; on the other hand, limit structure can play good cushioning effect, for public piece to keeping away from female member 2 open end terminal surface removal, releases locking force or frictional force in advance. The axial length of the limiting block 4 is longer than that of the reinforcing ribs 41, and when the outer ring surface of the roller 11 is in contact with the limiting block 4, the limiting block 4 compresses the female part 2, so that the roller 11 is effectively prevented from being separated. The transmission assembly is simple in structure, firm in fixation, good in sealing performance and long in service life.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. A drop-proof dust cover for a drive shaft universal joint is used on a transmission joint, the transmission joint comprises a female member (2) positioned at the end of an input shaft (21) and a male member positioned at the end of an output shaft (1), the female member (2) comprises a housing, the male member comprises a rolling bearing, the rolling bearing comprises a plurality of rollers (11), and the rollers are inserted into the housing through an open end of the housing of the female member (2); it is characterized in that the preparation method is characterized in that,

the dust cover comprises a main body (3), the main body (3) sequentially comprises a first open end (31), a corrugated cylinder body (32), a connecting section (34) and a second open end (33), the opening of the first open end (31) is smaller than that of the second open end (33), the first open end (31) of the dust cover is fixed on the output shaft (1), and the second open end (33) of the dust cover is fixed on the female part (2).

2. The drop-proof type dust cover for a drive shaft universal joint according to claim 1, further comprising a stopper (4) and a reinforcing rib (41) connected to the stopper (4), wherein the stopper (4) is provided on an inner surface of the connecting section (34), and when the dust cover is in a stretched state, the roller (11) is placed in the second open end (33) and an outer ring arc surface of the roller (11) is in contact with the stopper (4), and the stopper (4) prevents the roller (11) from being detached from the female member (2).

3. The dust cover for the universal joint of the anti-falling driving shaft according to claim 2, wherein the number of the limiting blocks (4) is at least two, each group of the limiting blocks (4) comprises at least two, the inner wall of the connecting section (34) is provided with a plurality of concave parts and convex parts which are distributed at intervals, each group of the limiting blocks (4) is respectively arranged on the connecting section (34) at the concave parts, and the limiting blocks (4) are provided with surfaces which are matched with the cambered surfaces of the outer rings of the rollers (11).

4. The dust cover for the drop-proof drive shaft universal joint according to claim 3, wherein the thickness of the stopper (4) is gradually reduced in a direction away from the corrugated cylinder (32), and the stopper (4) is a wedge-shaped block.

5. The dust cover for a drop-proof drive shaft universal joint according to claim 3, wherein the stopper (4) opposite to the surface is provided with a reinforcing rib (41), the reinforcing rib (41) is fixedly connected with the inner wall of the connecting section (34), the reinforcing rib (41) comprises at least one, and when the second open end (33) is fixed at the open end of the female member (2), the end surface of the open end of the female member (2) is in contact with or close to the reinforcing rib (41).

6. The drop-proof type dust cover for a drive shaft joint according to claim 5, wherein the stopper (4) has an axial length greater than that of the reinforcing rib (41), and when the second open end (33) is fixed to the open end of the female member (2), the end of the stopper (4) protrudes into the open end of the female member (2), and the stopper (4) comes into contact with or approaches the inner wall of the female member (2).

7. A transmission assembly comprising a female member (2) at an end of an input shaft (21), a male member at an end of an output shaft (1), and a drop-proof dust cover for a drive shaft joint according to any one of claims 1 to 6, the female member (2) comprising a housing, the male member comprising a rolling bearing, the rolling bearing comprising a plurality of rollers (11) inserted into the housing through an open end of the housing of the female member (2), a first open end (31) of the dust cover being fixed to the output shaft (1), and a second open end (33) of the dust cover being fixed to the female member (2).

8. The transmission assembly according to claim 7, wherein the second open end (33) is provided with a projection (333) at an outer wall edge thereof in a circumferential direction, the projection (333) includes at least three, an annular flange (334) is provided on an outer wall of the second open end (33) where the connection section (34) is connected, and the projection (333) and the flange (334) are prevented from being disengaged by the clip when the second open end (33) is fixed to the open end of the female member (2) by the clip.

9. A variator component as claimed in claim 7, characterised in that the inner wall of the second open end (33) is provided with a circumferential rib (332) and the outer wall of the open end of the female part (2) is provided with a mounting groove which mates with the rib (332).

10. The transmission assembly according to claim 7, characterized in that the inner wall of the first open end (31) is provided with an annular limiting edge, the output shaft (1) is provided with a limiting groove matched with the limiting edge, the edge of the outer wall of the first open end (31) is provided with a plurality of segments of ribs along the circumferential direction, and the clamping band is clamped on the outer wall of the first open end (31).

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