Split type constant velocity universal joint

Abstract

The utility model relates to a split type constant velocity universal joint which comprises bell housings, a starlike sleeve, a retainer and a plurality of steel balls, the retainer is located between the bell housings, the retainer is provided with a plurality of through positioning holes, and the steel balls are correspondingly limited in the positioning holes. The bell-shaped shell comprises a locking piece, a roller way body and a half shaft body, wherein the roller way body and the half shaft body are detachably connected, and the roller way body and the half shaft body are connected in a locking mode through the locking piece. A plurality of concave roller way grooves are formed in the inner wall of the roller way body, and the steel balls are limited between the roller way grooves and the star-shaped sleeve. The bell housing adopts a split mechanism formed by combining the roller way body and the half shaft body, and the half shaft body can be quickly replaced only by disassembling the locking piece, so that the half shaft replacement time is effectively shortened. The roller way body is of an independent machining structure, and the roller way groove in the roller way body can be independently machined, so that the production and machining difficulty of the bell housing is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a universal joint technical field relates to a split type constant velocity universal joint. BACKGROUND

[0002] The ball cage type constant velocity universal joint is used as the transmission mechanism of power transmission and rotation, and can transmit kinetic energy between the power source and the actuator. The star-shaped sleeve of the ball cage type universal joint is connected with the driving shaft through the inner spline, the outer surface of the star-shaped sleeve has six grooves to form an inner raceway. The inner surface of the bell-shaped shell has six corresponding grooves to form an outer raceway, and six transmission steel balls are respectively arranged in each groove and kept in a plane by the retainer 4. The power is output through the transmission steel ball and the spherical shell by the driving shaft.

[0003] In some severe use scenarios such as automobile drag racing, the half shaft connected by the universal joint is easy to be damaged. Since the existing bell-shaped shell is a whole structure, the whole universal joint needs to be replaced when the half shaft is damaged, which leads to the technical problem of lengthening the replacement time of the universal joint, affecting the subsequent competition of the vehicle, and therefore needs to be improved. SUMMARY

[0004] In order to overcome the problems in the related art, the embodiment of the utility model provides a split type constant velocity universal joint to solve the technical problem that the whole universal joint needs to be replaced when the half shaft is damaged, which leads to the lengthening of the replacement time of the universal joint.

[0005] According to the first aspect of the embodiment of the utility model, a split type constant velocity universal joint is provided, which comprises a bell-shaped shell, a star-shaped sleeve, a retainer and a plurality of steel balls. The retainer is located between the bell-shaped shell and the bell-shaped shell. The retainer is provided with a plurality of positioning holes penetrating through. The steel balls are limited in the positioning holes and the star-shaped sleeve:

[0006] The bell-shaped shell comprises a locking piece, a detachably connected roller body and a half shaft body. The locking piece connects the roller body and the half shaft body.

[0007] The inner wall of the roller body is provided with a plurality of concave roller grooves. The steel balls are limited between the roller grooves and the star-shaped sleeve.

[0008] In an embodiment, one of the roller body and the half shaft body is provided with a plug-in convex rib, and the other is provided with a plug-in concave groove. The plug-in convex rib and the plug-in concave groove are plugged and positioned.

[0009] In an embodiment, the plug-in convex rib is formed by partially protruding from the end face of the roller body, and the plug-in concave groove is formed by recessing from the end face of the half shaft body.

[0010] In an embodiment, the inner side of the plug-in convex rib is flush with the hole wall of the roller body.

[0011] In an embodiment, the roller body and the half shaft body are each provided with a flange, and the locking member is configured as a bolt or a screw, and the locking member locks the flanges of the roller body and the half shaft body.

[0012] In an embodiment, the flange is provided with a plurality of locking holes distributed at intervals, and the center lines of the locking holes are parallel or inclined relative to the axis of the half shaft body.

[0013] In an embodiment, the locking hole of the half shaft body is configured as a threaded hole.

[0014] In an embodiment, the roller groove is configured as a straight groove, and the steel ball moves in the roller groove.

[0015] In an embodiment, the roller groove is an arc-shaped groove, and the steel ball moves in the roller groove.

[0016] In an embodiment, the half shaft body includes a connecting portion and a shaft portion, the shaft portion protrudes from one side of the connecting portion in an axial manner, and the other side end face of the connecting portion is concave to form a clearance groove.

[0017] The technical scheme provided by the embodiment of the utility model can have the following beneficial effects: the split mechanism composed of the roller body and the half shaft body is used for the bell-shaped shell, only the locking member needs to be disassembled to quickly replace the half shaft body, and the replacement time of the half shaft body is effectively reduced. The roller body is an independent machining structure, the internal roller groove can be independently machined, and the production and machining difficulty of the bell-shaped shell is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings incorporated into the specification and forming a part thereof show embodiments consistent with the utility model and serve to explain the principles of the utility model together with the specification.

[0019] Figure 1 is a structure schematic view of a fixed end universal joint according to an embodiment.

[0020] Figure 2 is a sectional structure schematic view of a fixed end universal joint according to an embodiment.

[0021] Figure 3 is an exploded structure schematic view of a fixed end universal joint according to an embodiment.

[0022] Figure 4 is a structure schematic view of a movable end universal joint according to an embodiment.

[0023] Figure 5 is a sectional structure schematic view of a movable end universal joint according to an embodiment.

[0024] Figure 6is an exploded structural schematic diagram of a movable end universal joint according to an embodiment.

[0025] In the figure, the clock shell 10; half shaft body 11; convex shaft part 111; connecting part 112; plug-in groove 113; threaded hole 114; roller body 12; roller groove 121; plug-in convex rib 122; flange 123; locking hole 124; locking piece 13; retainer 20; positioning hole 21; star sleeve 30; steel ball 40. DETAILED DESCRIPTION

[0026] The same or similar reference signs in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and therefore the terms describing the positional relationship in the drawings cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, structure and operation, therefore the terms describing the positional relationship in the drawings are only used for exemplary description, and cannot be understood as limiting the present application, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0027] As Figures 1 to 3 shown, the present application provides a split type constant velocity universal joint, the split type constant velocity universal joint includes a clock shell 10, a star sleeve 30, a retainer 20 and a plurality of steel balls 40, the retainer 20 is provided with a plurality of through positioning holes 21, and the steel balls 40 are correspondingly limited in the positioning holes 21. That is, the constant velocity universal joint constitutes a ball cage type constant velocity universal joint.

[0028] The clock shell 10 includes a locking piece 13, a detachably connected roller body 12 and a half shaft body 11, and the locking piece 13 detachably connects the roller body 12 and the half shaft body 11. The roller body 12 and the half shaft body 11 are in a split structure, and the two parts are folded to form the clock shell 10, and the retainer 20 is located between the roller body 12 and the clock shell 10.

[0029] Among them, the roller body 12 is a ring-shaped tubular structure, the inner wall of the roller body 12 is provided with a plurality of concave roller grooves 121, and the steel balls 40 are limited between the roller grooves 121 and the star sleeve 30. Optionally, the roller grooves 121 are provided as six, and the star sleeve 30 is provided with matching inner roller grooves. The roller body 12 is an independent machining structure, and the internal roller grooves 121 can be machined independently, thereby reducing the production and machining difficulty of the clock shell 10.

[0030] The half shaft body 11 is fixed to one end of the roller body 12, and the half shaft body 11 is provided with a protruding shaft portion 111. Optionally, the roller body 12 and the half shaft body 11 are both provided with flange portions 123, and the locking member 13 is configured as a bolt or a screw, and the locking member 13 locks the flange portions 123 of the roller body 12 and the half shaft body 11. The roller body 12 and the half shaft body 11 are both provided with flange structures, and the locking member 13 locks and connects the flange portions 123 of the two into one body. The clock shell 10 adopts a split mechanism composed of the roller body 12 and the half shaft body 11, and only needs to disassemble the locking member 13 to quickly replace the half shaft body 11, effectively reducing the replacement time of the half shaft.

[0031] In an embodiment, the half shaft body 11 includes a connecting portion 112 and a shaft portion 111, the shaft portion 111 protrudes from one side of the connecting portion 112, and the other end surface of the connecting portion 112 is recessed to form a clearance groove. The connecting portion 112 is a flange structure, and the shaft portion 111 is configured as a shaft structure, and the flange portion 123 of the connecting portion 112 protrudes from the shaft portion 111. The clearance groove is recessed to facilitate the movement of the retainer 20.

[0032] Further, the detachable connection of the roller body 12 and the half shaft body 11 can greatly improve the universality of the universal joint on different vehicle models.

[0033] Optionally, the roller body 12 and the half shaft body 11 are in plane abutment, and the locking member 13 is inserted and locked from one of them to the other. Optionally, the locking member 13 is configured as a screw member.

[0034] As shown in the figure, Figures 3 to 6 In a preferred embodiment, one of the roller body 12 and the half shaft body 11 is provided with a plug-in protruding rib 122, and the other is provided with a plug-in recess 113, and the plug-in protruding rib 122 and the plug-in recess 113 are plug-in positioned. The plug-in protruding rib 122 and the plug-in recess 113 are complementarily positioned to improve the plug-in fitting accuracy.

[0035] In an optional embodiment, the end of the half shaft body 11 is provided with a protruding plug-in protruding rib 122, and the end of the roller body 12 is provided with a recessed plug-in recess 113, and the plug-in protruding rib 122 and the plug-in recess 113 are complementarily stepped structures to constitute plug-in fitting positioning.

[0036] In another optional embodiment, the end of the roller body 12 is provided with a protruding plug-in protruding rib 122, and the end of the half shaft body 11 is provided with a recessed plug-in recess 113, and the plug-in protruding rib 122 and the plug-in recess 113 are complementarily stepped structures to constitute plug-in fitting positioning. In this embodiment, the plug-in protruding rib 122 is locally protruded from the end surface of the roller body 12, and the plug-in recess 113 is recessed from the end surface of the half shaft body 11.

[0037] The plug-in rib 122 is annular, and can form an annular connection. Preferably, the plug-in surface of the plug-in rib 122 is a cylindrical surface, so as to form a straight plug-in connection. Further preferably, the plug-in surface of the plug-in rib 122 is a tapered surface, so as to form a tapered surface fit, and improve the plug-in fit accuracy.

[0038] In a preferred embodiment, the plug-in rib 122 and the end surface of the roller body 12 are provided with a concave clearance groove, and the plug-in rib 122 is inserted into the plug-in groove 113, so that the end surface of the half shaft body 11 and the end surface of the roller body 12 are tightly fitted, and form a seamless fit.

[0039] The plug-in rib 122 protrudes from the end surface of the flange 123 of the roller body 12, and forms a local rib structure. The plug-in rib 122 can be distributed in the middle region, the outer edge or the inner edge of the end surface.

[0040] Further preferably, the inner side of the plug-in rib 122 is flush with the hole wall of the roller body 12. The plug-in rib 122 is annular, and the inner circle of the plug-in rib 122 is flush with the inner circle of the roller body 12, so as to strengthen the end surface structure of the roller body 12.

[0041] As shown in Figure 2 and Figure 5 , the roller body 12 and the half shaft body 11 are locked by the locking member 13. The flange 123 is provided with a plurality of locking holes 124 which are distributed at intervals, and the center lines of the locking holes 124 are parallel or inclined to the axis of the half shaft body 11. The locking member 13 is configured as a bolt or a screw, and is connected by thread locking. Alternatively, the locking holes 124 on the flange 123 of the roller body 12 are configured as through holes, and the locking holes 124 on the flange 123 of the half shaft body 11 are configured as threaded holes 114, and the fastener passes through the through hole and is locked with the threaded hole 114.

[0042] Alternatively, the center lines of the locking holes 124 are parallel to the center line of the half shaft body 11, and the plurality of locking holes 124 are uniformly distributed around the center line of the half shaft body 11. The center lines of the plurality of locking holes 124 are arranged in parallel, and can realize multi-point parallel locking and parallel disassembly.

[0043] Alternatively, the center lines of the locking holes 124 are inclined to the center line of the half shaft body 11, and the half shaft body 11 is provided with the threaded hole 114, so that the fastener is assembled from the side of the roller body 12 to the half shaft body 11, and the interference between the locking member 13 and the dust cover installed on the constant velocity universal joint during assembly and disassembly can be effectively avoided.

[0044] As shown in Figure 4 and Figure 6As shown in the embodiment, the split constant velocity universal joint is provided with a movable end universal joint, wherein the roller groove 121 is configured as a straight groove, and the steel ball is movably arranged in the roller groove 121. The steel ball can move linearly along the roller groove 121, and the half shaft body 11 can not only change the rotation angle, but also realize the linear direction movement. In addition, the roller groove 121 of the roller body 12 can be independently processed, and a more flexible processing mode can be realized.

[0045] As shown in the embodiment, Figures 1 to 3 As shown in another embodiment, the split constant velocity universal joint is provided with a fixed end universal joint, wherein the roller groove 121 is configured as an arc-shaped groove, and the steel ball is movably arranged in the roller groove 121. The steel ball can roll along the roller groove 121 in an arc shape, and the half shaft body 11 only changes the rotation angle, and does not change the linear direction movement.

[0046] It should be understood that the present application is not limited to the precise construction which has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made without departing from the scope thereof. The present application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the application pertains or the patents issued based thereon.

Claims

1. A split constant velocity universal joint, comprising a cup-shaped housing, a star-shaped sleeve, a retainer and a plurality of steel balls, the retainer being located between the cup-shaped housing and the cup-shaped housing, the retainer being provided with a plurality of positioning holes, the steel balls being correspondingly defined in the positioning holes, characterized in that: the cup-shaped housing comprises a locking member, a detachably connected roller body and a half shaft body, the locking member detachably connecting the roller body and the half shaft body; an inner wall of the roller body is provided with a plurality of concave roller grooves, the steel balls being defined between the roller grooves and the star-shaped sleeve.

2. The split constant velocity joint of claim 1, wherein, one of the roller body and the half shaft body is provided with an insertion convex rib, and the other is provided with an insertion concave groove, the insertion convex rib and the insertion concave groove being inserted and positioned.

3. The split constant velocity joint of claim 2, wherein, the insertion convex rib is formed by partially protruding from an end surface of the roller body, and the insertion concave groove is formed by recessing from an end surface of the half shaft body.

4. The split constant velocity joint of claim 3, wherein, an inner side of the insertion convex rib is flush with a hole wall of the roller body.

5. The split constant velocity joint of claim 1 wherein, the roller body and the half shaft body are both provided with flange protrusions, the locking member being configured as a bolt or a screw, the locking member locking the flange protrusions of the roller body and the half shaft body.

6. The split constant velocity joint of claim 5, wherein, the flange protrusions are provided with a plurality of locking holes which are spaced apart, center lines of the locking holes being parallel or inclined with respect to an axis of the half shaft body.

7. The split constant velocity joint of claim 6, wherein, the locking holes of the half shaft body are configured as threaded holes.

8. The split constant velocity joint of claim 1 wherein, the roller grooves are configured as straight grooves, the steel balls being movable in the roller grooves.

9. The split constant velocity joint of claim 1 wherein, the roller grooves are configured as arc grooves, the steel balls being movable in the roller grooves.

10. The split constant velocity joint of claim 1 wherein, the half shaft body comprises a connecting portion and a convex shaft portion, the convex shaft portion protruding from one side of the connecting portion, an inner side of the other side of the connecting portion being recessed to form a clearance recess.

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