Universal spline sleeve for spline shafts and cylindrical shafts

Abstract

This utility model discloses a universal spline sleeve suitable for splined shafts and cylindrical shafts, comprising a cylindrical tube portion; a disc portion integrally connected to one end of the cylindrical tube portion; a toothed section located inside the cylindrical tube portion for assembly with the splined shaft; a stepped cavity section located inside the cylindrical tube portion for assembly with the cylindrical shaft, the stepped cavity section having a circular cross-sectional profile; and radial through holes, several of which penetrate the inner and outer walls of the cylindrical tube portion, one end of which intersects with the toothed section, and the radial through holes are used to pass through fasteners, one end of which is used to abut against the cylindrical shaft; wherein, the toothed section and the stepped cavity section are coaxially arranged and connected. By integrating the toothed section and the stepped cavity section, this utility model achieves bidirectional adaptation for splined shafts and cylindrical shafts, and one set of structure can meet the assembly requirements of both shaft types.

Description

Technical Field

[0001] This utility model relates to spline sleeves, specifically to a universal spline sleeve suitable for spline shafts and cylindrical shafts. Background Technology

[0002] Spline sleeves are mainly used in conjunction with spline shafts. Their core structure consists of an inner hole with an internal spline that matches the external teeth of the spline shaft. Circumferential positioning and torque transmission are achieved through tooth surface meshing. Due to their high centering accuracy and strong load-bearing capacity, they are widely used in machine tool spindles, automotive gearboxes, and other applications requiring efficient torque transmission.

[0003] Smooth cylindrical shafts are usually assembled with ordinary bushings, couplings or bearings. Their fit depends on the interference fit between the inner hole and the outer circle of the cylindrical shaft, or is supplemented by structures such as flat keys and set screws to transmit torque. The structure is simple, but the reliability of torque transmission is greatly affected by the fit accuracy. They are mostly used in low-load scenarios such as light transmission and conveying equipment.

[0004] In practical applications, scenarios such as equipment maintenance and modular retrofitting sometimes require compatibility between splined and cylindrical shafts. For example, when upgrading old equipment, new components need to be compatible with the original splined shaft, and subsequent replacement with cylindrical shafts requires redesign. Or, the same workstation may need to alternate between the two shaft types to adapt to different working conditions. Because their cross-sectional profiles are different, existing splined sleeves are only compatible with splined shafts, and cylindrical shaft components are not compatible with splined shafts, making it impossible to meet these special requirements. Utility Model Content

[0005] The problem to be solved by this utility model is to provide a universal spline sleeve suitable for spline shafts and cylindrical shafts.

[0006] To solve the above problems, this utility model provides a universal spline sleeve suitable for splined shafts and cylindrical shafts. To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problems is as follows:

[0007] A universal spline sleeve suitable for splined shafts and cylindrical shafts includes: a cylindrical tube portion; a disc portion integrally connected to one end of the cylindrical tube portion; a toothed section located inside the cylindrical tube portion for assembly with the splined shaft; a stepped cavity section located inside the cylindrical tube portion for assembly with the cylindrical shaft, wherein the stepped cavity section has a circular cross-sectional profile; and radial through holes, wherein a plurality of radial through holes penetrate the inner and outer walls of the cylindrical tube portion, one end of the radial through holes intersects with the toothed section, the radial through holes are used to pass through fasteners, and one end of the fasteners is used to abut against the cylindrical shaft; wherein the toothed section and the stepped cavity section are coaxially arranged and connected.

[0008] As a further improvement of this utility model, the stepped cavity segment includes a coaxial first cylindrical cavity segment and a second cylindrical cavity segment. The inner diameter of the first cylindrical cavity segment is larger than the inner diameter of the second cylindrical cavity segment. A stepped surface is formed at the junction of the first cylindrical cavity segment and the second cylindrical cavity segment. The stepped surface is perpendicular to the axis of the circular tube. The first cylindrical cavity segment is adjacent to the toothed segment.

[0009] As a further improvement of this utility model, the toothed section includes several ring-shaped arrays of racks, the length direction of which is parallel to the axis of the circular tube; the inner diameter of the first cylindrical cavity section is smaller than the inner diameter corresponding to the tooth tip circle of the toothed section.

[0010] As a further improvement of this utility model, the circumferential dimension of the rack is the tooth thickness, and the inner diameter of the radial through hole is not less than three times the tooth thickness.

[0011] As a further improvement of this utility model, a wavy opening is formed at the intersection of the radial through hole and the toothed section, and both ends of the wavy opening along the circumferential direction of the circular tube are located at the tooth bottom of the toothed section.

[0012] As a further improvement of this utility model, the number of radial through holes is three, five, seven or nine.

[0013] As a further improvement of this utility model, the fastener is a tapered end stop bolt.

[0014] As a further improvement of this utility model, the end of the toothed segment away from the stepped cavity segment has a chamfer.

[0015] As a further improvement of this utility model, the disc portion has several fixing holes through it.

[0016] The beneficial technical effects of using the universal spline sleeve applicable to splined shafts and cylindrical shafts of this application are:

[0017] This system achieves bidirectional compatibility with both splined and cylindrical shafts, eliminating the need for separate components for each shaft type. When assembling a splined shaft, the splined teeth enable tooth surface meshing, meeting circumferential positioning and torque transmission requirements. When assembling a cylindrical shaft, a stepped cavity section provides initial fit, followed by fasteners within radial through holes to secure the shaft. This effectively solves the problem of existing components being incompatible with both shaft types, making it suitable for equipment maintenance, modular retrofitting, and other scenarios.

[0018] The circular cross-sectional profile of the stepped cavity section can precisely fit with the outer circle of the cylindrical shaft, providing basic support, while the fasteners in the radial through hole can directly abut against the outer wall of the cylindrical shaft, restricting the circumferential rotational freedom of the cylindrical shaft and improving stability in light or temporary transmission scenarios.

[0019] The toothed section and the stepped cavity section are coaxially arranged and connected, ensuring the alignment of the shaft and spline sleeve regardless of whether a splined shaft or a cylindrical shaft is assembled. Suitable for use in vehicle parts manufacturing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of one embodiment of the present utility model;

[0022] Figure 2 This is a partial enlarged view of point A in one embodiment of this utility model;

[0023] Figure 3 This is a perspective view of one embodiment of the present utility model;

[0024] Figure 4 This is a front view of one embodiment of the present invention;

[0025] Figure 5 This is a BB cross-sectional view of one embodiment of the present invention.

[0026] 1-Disc section; 2-Circular tube section; 3-Radial through hole; 4-Gear section; 401-Tooth tip; 402-Tooth base; 5-Fixing hole; 6-Chamfer; 7-First cylindrical cavity section; 8-Second cylindrical cavity section; 9-Step surface. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to specific embodiments:

[0028] To achieve the purpose of this utility model, a universal spline sleeve suitable for splined shafts and cylindrical shafts is provided, comprising: a circular tube portion 2; a disc portion 1 integrally connected to one end of the circular tube portion 2; a toothed section 4 located inside the circular tube portion 2 for assembly with a splined shaft; a stepped cavity section located inside the circular tube portion 2 for assembly with a cylindrical shaft, the stepped cavity section having a circular cross-sectional profile; and radial through holes 3, a plurality of radial through holes 3 penetrating the inner and outer walls of the circular tube portion 2, one end of the radial through holes 3 intersecting with the toothed section 4, the radial through holes 3 being used to pass through fasteners, one end of the fasteners being used to abut against the cylindrical shaft. The toothed section 4 and the stepped cavity section are coaxially arranged and connected.

[0029] The axial distance from the toothed section 4 to the disc section 1 is greater than the axial distance from the stepped cavity section to the disc section 1.

[0030] The beneficial effects of adopting the above technical solution are as follows: On the one hand, when this universal spline sleeve needs to be assembled with a spline shaft, the spline shaft is inserted and engages with the spline tooth section 4, restricting their mutual circumferential degrees of freedom. On the other hand, when this universal spline sleeve needs to be assembled with a smooth cylindrical shaft, the cylindrical shaft is inserted and assembled with the stepped cavity section. Because the cylindrical body and the cylindrical cavity fit together, the stepped cavity section indicates that it also has a unidirectional axial limiting capability. However, at this time, the circumferential rotational degree of freedom of the cylindrical shaft is not restricted, so a fastener passing through the radial through hole 3 is needed to lock the cylindrical shaft. Therefore, this universal spline sleeve can be used for two types of shaft components.

[0031] The reason why the radial through hole 3 is located in the spline section 4 instead of the stepped cavity section is that the fastener can lock the round shaft in this way. Even if the round shaft is misaligned, it will not damage the rack of the nearby spline section 4, thus ensuring the quality of the spline section 4 and not affecting the next assembly of the spline section 4 with the spline shaft.

[0032] like Figure 5 As shown, in some other embodiments of this utility model, the stepped cavity section includes a coaxial first cylindrical cavity section 7 and a second cylindrical cavity section 8. The inner diameter of the first cylindrical cavity section 7 is larger than the inner diameter of the second cylindrical cavity section 8. A step surface 9 is formed at the junction of the first cylindrical cavity section 7 and the second cylindrical cavity section 8. The step surface 9 is perpendicular to the axis of the circular tube section 2. The first cylindrical cavity section 7 is adjacent to the toothed section 4.

[0033] The beneficial effects of adopting the above technical solution are: the stepped cavity section is composed of a first cylindrical cavity section 7 and a second cylindrical cavity section 8, and a stepped surface 9 is formed at the junction. The stepped surface 9 is perpendicular to the axis of the cylindrical tube section 2 and can directly abut the end face of the cylindrical shaft, providing reliable axial limit and enhancing the positioning accuracy of the cylindrical shaft during assembly.

[0034] In some other embodiments of this invention, the toothed segment 4 includes a plurality of annularly arrayed racks, the length direction of which is parallel to the axis of the circular tube portion 2. The inner diameter of the first cylindrical cavity segment 7 is smaller than the inner diameter corresponding to the tooth tip circle of the toothed segment 4.

[0035] Both splined shafts and cylindrical shafts are inserted from the end of the splined section 4 that is away from the stepped cavity section.

[0036] The beneficial effects of adopting the above technical solution are: the splined section 4 adopts a rack structure with a ring array, and the inner diameter of the first cylindrical cavity section 7 is smaller than the inner diameter corresponding to the tooth tip circle of the splined section 4. In this way, when assembling the cylindrical shaft, the cylindrical shaft will not contact or wear the tooth tip 401 of the splined section 4, thus protecting the integrity of the splined section 4 and ensuring that the subsequent assembly performance with the splined shaft is not affected.

[0037] In some other embodiments of this utility model, the circumferential dimension of the rack is the tooth thickness, and the inner diameter of the radial through hole 3 is not less than three times the tooth thickness.

[0038] The 4th tooth segment includes a tooth crest 401 and a tooth trough 402. The tooth crest 401 is the outwardly convex peak, and the tooth trough 402 is the inwardly concave trough.

[0039] The beneficial effect of adopting the above technical solution is that it ensures that the fastener passing through the radial through hole 3 has a sufficient diameter.

[0040] like Figure 2 As shown, in some other embodiments of this utility model, a wavy opening is formed at the intersection of the radial through hole 3 and the toothed section 4, and both ends of the wavy opening along the circumferential direction of the circular tube 2 are located at the tooth bottom of the toothed section 4.

[0041] The beneficial effects of adopting the above technical solution are: this design reduces stress concentration, prevents damage to the tooth tip 401 during the fastening process, avoids the situation where the thickness of the rack is halved due to the wavy opening, and at the same time maintains the structural strength of the flower tooth segment 4.

[0042] In some other embodiments of this utility model, the number of radial through holes 3 is three, five, seven, or nine. For example... Figure 1 Three radial through holes 3 are shown in the diagram.

[0043] The beneficial effects of adopting the above technical solution are: an odd number of units helps to achieve a balanced distribution of fastening force in the circumferential direction, improves the locking stability of the cylindrical shaft, and avoids loosening caused by uneven force.

[0044] In some other embodiments of this invention, the fastener is a tapered end stop bolt. The end of the tapered end stop bolt has a conical portion that can penetrate the outer wall of a cylindrical shaft.

[0045] Radial through hole 3 is a countersunk hole, and the tapered end stop bolt is also an internal hex bolt.

[0046] The beneficial effect of adopting the above technical solution is that its conical end can penetrate into the outer wall of the cylindrical shaft, forming a more secure mechanical lock.

[0047] In some other embodiments of this utility model, the end of the toothed segment 4 away from the stepped cavity segment has a chamfer 6.

[0048] The beneficial effects of adopting the above technical solution are: the chamfer of 6 facilitates the smooth insertion of splined shafts or cylindrical shafts, reduces resistance and alignment difficulty during assembly, improves installation efficiency, and reduces the risk of component wear.

[0049] In some other embodiments of this utility model, the disc portion 1 has a plurality of fixing holes 5 extending through it.

[0050] The beneficial effects of adopting the above technical solution are: it allows the spline sleeve to be fixed to the external base by bolts and other connecting parts, which enhances the stability of the overall structure and the ease of installation, and ensures that the spline sleeve maintains a fixed position during transmission.

[0051] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A universal spline sleeve suitable for splined shafts and cylindrical shafts, characterized in that, include: Round tube section; The disc section is integrally connected to one end of the tube section; The toothed section, located inside the round tube, is used for assembly with the splined shaft; A stepped cavity section, located inside the circular tube section, is used for assembly with a cylindrical shaft, and the cross-sectional profile of the stepped cavity section is circular. Radial through holes, several radial through holes penetrating the inner and outer walls of the circular tube section, one end of the radial through holes intersects with the toothed section, the radial through holes are used to pass through fasteners, one end of the fasteners is used to abut against the cylindrical shaft; Among them, the toothed segment and the stepped cavity segment are arranged coaxially and connected.

2. The universal spline sleeve applicable to splined shafts and cylindrical shafts according to claim 1, characterized in that: The stepped cavity section includes a coaxial first cylindrical cavity section and a second cylindrical cavity section. The inner diameter of the first cylindrical cavity section is larger than the inner diameter of the second cylindrical cavity section. A stepped surface is formed at the junction of the first cylindrical cavity section and the second cylindrical cavity section. The stepped surface is perpendicular to the axis of the circular tube section. The first cylindrical cavity section is adjacent to the toothed section.

3. The universal spline sleeve applicable to splined shafts and cylindrical shafts according to claim 2, characterized in that: The toothed section includes several ring-shaped arrays of racks, the length direction of which is parallel to the axis of the circular tube section; The inner diameter of the first cylindrical cavity segment is smaller than the inner diameter corresponding to the tooth tip circle of the toothed segment.

4. The universal spline sleeve applicable to splined shafts and cylindrical shafts according to claim 3, characterized in that: The circumferential dimension of the rack is the tooth thickness, and the inner diameter of the radial through hole is not less than three times the tooth thickness.

5. The universal spline sleeve applicable to splined shafts and cylindrical shafts according to claim 1, characterized in that: The intersection of the radial through hole and the toothed section forms a wavy opening, and both ends of the wavy opening along the circumferential direction of the circular tube are located at the bottom of the toothed section.

6. The universal spline sleeve applicable to splined shafts and cylindrical shafts according to claim 1, characterized in that: The number of radial through holes is three, five, seven, or nine.

7. The universal spline sleeve applicable to splined shafts and cylindrical shafts according to claim 1, characterized in that: The fastener is a tapered end stop bolt.

8. The universal spline sleeve applicable to splined shafts and cylindrical shafts according to claim 1, characterized in that: The end of the toothed segment away from the stepped cavity segment has a chamfer.

9. The universal spline sleeve applicable to splined shafts and cylindrical shafts according to claim 1, characterized in that: The disc portion has several fixing holes running through it.

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