Universal shaft spline positioning device

Abstract

The invention discloses a cardan shaft spline positioning device which comprises a shaft body, a spline sleeve, a front positioning disc and a rear positioning disc, the shaft body is coaxially and fixedly connected with the rear positioning disc, the shaft body is sleeved with the spline sleeve in a circumferential spline positioning mode, and the spline sleeve is coaxially and fixedly connected with the front positioning disc; the shaft body is a hollow shaft, splines are evenly distributed on the circumferential outer wall of the shaft body, and a shaft neck is integrally manufactured at the end, connected with the front positioning disc, of the shaft body. A radial concave ring groove is formed in the shaft neck, and a guide copper ring is annularly connected and fixed on the shaft neck and the ring groove in an embracing manner; a spline pair meshed with a spline of the shaft body is arranged in the spline sleeve, one end of the spline sleeve is fixedly connected with the front positioning disc, and the spline sleeve and the front positioning disc are matched to rotate in the circumferential direction and are clamped on the guide copper ring in an axial limiting mode. The device separates the bearing force in different directions of the original spline, effectively improves the equipment capacity and stability, and reduces the maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of shaft connection, and particularly to a universal shaft spline positioning device. Background Art

[0002] The universal shaft spline positioning device is a component or system that ensures the accurate and stable centering and torque transmission of the spline connection part in the universal shaft, and it is crucial for maintaining the efficiency, reliability, and lifespan of the transmission system.

[0003] In the current equipment of our company that uses universal shafts, the failure problems mainly come from the excessive wear of the universal shaft spline pair, and all are imported parts that are difficult to repair and replace. There are currently 2 imported parts and 3 domestic parts available as spare parts for the perforated universal shaft spline pair. In the early stage of 2021, the inner spline sleeve was bored and a copper guide ring was fabricated for repair, and the site could meet a usage cycle of 5 - 6 months; so far, the imported parts have been used for up to 7 years in total, and the domestic parts have been used for more than 4 years in total. The wear trend of the tooth surface of the spline pair is relatively serious, and the maximum wear has reached 2.5 mm. The meshing accuracy of the spline pair can no longer be guaranteed; from 2021 to the beginning of 2023, the spline pair and the large shaft were replaced 16 times due to the telescopic failure of the spline pair, and the telescopic jamming of the spline shaft also has a greater impact on the shaft support, which may lead to the occurrence of derivative failures of the shaft support; also, due to the large amount of high-grade steel billets rolled by the 460 unit in the past two years, there is a possibility of accelerated wear of the spline pair hidden danger, and even sudden fracture may occur.

[0004] Chinese Patent Publication No. CN203542106U, published on April 16, 2014, discloses a spline shaft fork milling spline positioning device, which includes a dial body with a machine tool center tip that can be assembled at the center position. A pawl is slidably positioned along the radial direction of the dial body. The pawl has a through groove corresponding to the ear hole of the spline shaft fork to be machined, and threaded holes are respectively provided on the two groove walls of the through groove, and positioning screws for positioning the ear hole of the spline shaft fork to be machined are threadedly connected to the threaded holes.

[0005] In summary, how to effectively solve the problem of spline pair wear, avoid sudden failures, improve the equipment capacity and stability, and ensure the smooth progress of on-site production has become an urgent technical problem for those skilled in the art. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide a universal shaft spline positioning device that separates the bearing forces in different directions of the original spline, effectively improves the equipment capacity and stability, and reduces the maintenance cost.

[0007] To solve the above problems, the present invention provides a universal shaft spline positioning device, which includes a shaft body, a spline sleeve, a front positioning disk and a rear positioning disk. The shaft body is coaxially and fixedly connected to the rear positioning disk. A spline sleeve is circumferentially sleeved on the outer circumference of the shaft body, and the spline sleeve is coaxially and fixedly connected to the front positioning disk;

[0008] The shaft body is a hollow shaft. Splines are evenly arranged on the circumferential outer wall of the shaft body, and a shaft neck is integrally formed at one end of the shaft body connected to the front positioning disk; a radially concave annular groove is formed on the shaft neck, and a guiding copper ring is circumferentially clamped and fixed on the shaft neck and the annular groove; a spline pair for meshing and connecting the splines of the shaft body is formed inside the spline sleeve. One end of the spline sleeve is fixedly connected to the front positioning disk, and the spline sleeve and the front positioning disk are rotatable circumferentially and axially limited and clamped on the guiding copper ring.

[0009] Preferably, the guiding copper ring includes a plurality of spliced arc-shaped half hoops, and the cross section of each arc-shaped half hoop is a "convex" structure; the two axial end faces of the guiding copper ring respectively abut against the inner end faces of the front positioning disk and the spline sleeve, and the protruding part on the inner circumference of the guiding copper ring is fixed in the annular groove.

[0010] Preferably, a plurality of copper ring positioning bolts are circumferentially evenly arranged and axially meshed and inserted at the shaft end of the shaft body connected to the front positioning disk. The copper ring positioning bolts extend into the annular groove and penetrate and fix the protruding part on the inner circumference of the guiding copper ring.

[0011] Preferably, end face splines for connecting the force input end and the force output end of the universal shaft are integrally formed on the end faces of the front positioning disk and the rear positioning disk.

[0012] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0013] A universal shaft spline positioning device of the present invention. The device is such that the circumferential rotational force transmitted by the shaft body is borne by the spline pair, and the non-coaxial radial force between the shaft body and the spline sleeve is borne by the guiding copper ring, thereby avoiding overall wear of the spline pair. During maintenance, only the guiding copper ring with relatively serious wear needs to be replaced. The specific functions of each component are as follows:

[0014] 1. Replace the original single splines on the shaft body as shown in Figure 1 with circumferentially evenly arranged splines as shown in Figure 2 , and evenly arrange spline pairs in the spline sleeve to achieve uniform force on multiple spline pairs and avoid excessive wear of a single spline pair;

[0015] 2. Fix and connect the guiding copper ring through the annular groove on the shaft neck. The guiding copper ring is circumferentially slidable, radially supported inwardly and axially limited to connect the combined components of the front positioning disk and the spline sleeve, and the guiding copper ring shares the radial force borne by the spline pair;

[0016] 3. The guiding copper ring is made by butt - jointing split - type arc - shaped hoops, which is convenient for disassembly and installation, reduces the labor intensity when repairing and replacing the guiding copper ring, and introduces the "consumable" design concept of the guiding copper ring, avoiding the replacement of the whole spline sleeve due to the wear of the spline pair. During maintenance, only the severely worn guiding copper ring needs to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure and disassembly structure of the universal shaft spline positioning connection in the prior art;

[0018] Figure 2 It is a half - sectional view of the present invention;

[0019] Figure 3 is Figure 2 a partial enlarged view of part A in

[0020] In the figure: 1 - front positioning disc; 2 - spline sleeve; 3 - shaft body; 4 - rear positioning disc; 5 - monomeric spline; 6 - monomeric spline groove; 7 - spline; 8 - spline pair; 9 - guiding copper ring; 10 - end face spline; 11 - ring groove; 12 - copper ring positioning bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] Please refer to Figure 2 and Figure 3 , the present invention provides a technical solution: a universal shaft spline positioning device, including a shaft body 3, a spline sleeve 2, a front positioning disc 1 and a rear positioning disc 4. Among them, the shaft body is coaxially and fixedly connected to the rear positioning disc, and a spline sleeve is circumferentially and spline - positioned outside the shaft body. The spline sleeve is coaxially and fixedly connected to the front positioning disc;

[0023] The shaft body is a hollow shaft, and splines 7 are evenly arranged on the circumferential outer wall of the shaft body. And a shaft neck is integrally formed at one end of the shaft body connecting the front positioning disc. A radially concave ring groove 11 is formed on the shaft neck, and a guiding copper ring 9 is circumferentially clamped and fixed on the shaft neck and the ring groove. The inner part of the spline sleeve is provided with a spline pair 8 that meshes with the spline of the shaft body. One end of the spline sleeve is fixedly connected to the front positioning disc, and the spline sleeve and the front positioning disc cooperate to rotate circumferentially and are axially limited and clamped on the guiding copper ring.

[0024] Preferably, the guiding copper ring includes a plurality of spliced arc-shaped half-hoops, and the cross-section of each arc-shaped half-hoop is a "convex" structure; two axial end faces of the guiding copper ring respectively abut against the inner end faces of the front positioning disc and the spline sleeve, and the protruding part on the inner circumference of the guiding copper ring is fixed in the annular groove.

[0025] Preferably, a plurality of copper ring positioning bolts 12 are circumferentially distributed and axially meshed and inserted at the shaft end of the shaft body connecting the front positioning disc, and the copper ring positioning bolts extend into the annular groove and penetrate and fix the protruding part on the inner circumference of the guiding copper ring.

[0026] Preferably, end face splines 10 for connecting the universal shaft force input end and the force output end are integrally formed on the end faces of the front positioning disc and the rear positioning disc.

[0027] The working principle of the present invention is as follows:

[0028] In the existing technology improved by the present invention, the universal shaft spline positioning connection structure is as Figure 1 shown in the figure. A single-piece spline groove 6 is opened on the shaft body. A single-piece spline 5 is fixedly inserted into the single-piece spline groove. The single-piece spline 5 is used to connect the single-piece spline pair in the spline sleeve. This spline pair bears both the axial rotation force of the shaft body and the radial force, resulting in serious wear of the spline pair.

[0029] The installation steps of the present invention are as follows:

[0030] S1. First, sleeved a spline sleeve on the shaft body. At this time, the spline sleeve needs to be slid into the root of the shaft body, and the shaft neck part of the shaft body is exposed at one end connected to the front positioning disc (at this time, the shaft end of the spline sleeve has not been connected to the front positioning disc);

[0031] S2. Then, splice a plurality of arc-shaped half-hoops on the shaft neck to form a guiding copper ring. Axially screw the copper ring positioning bolts into the shaft body to fix the guiding copper ring inside the annular groove;

[0032] S3. Slide the spline sleeve towards the shaft body at one end of the guiding copper ring until the inner axial end face of the spline sleeve abuts against the axial end face of the guiding copper ring to achieve axial limit. Finally, bolt and fixedly connect the front positioning disc at the shaft end of the spline sleeve, and axially clamp the guiding copper ring by the cooperation of the axial end faces inside the front positioning disc and the spline sleeve.

[0033] Under the working state of the equipment, the rear positioning disc is the force input end of the overall universal shaft spline positioning device. The steering force is transmitted from the rear positioning disc to the shaft body. The splines uniformly opened on the shaft body are meshed with the spline pair in the spline sleeve, so as to transmit the circumferential rotation power from the shaft body to the spline sleeve.

[0034] Meanwhile, the front positioning disc is the force output end of the integral universal shaft spline positioning device. This force output end will conduct a radial force that is not coaxial with the shaft body to the spline pair. This radial force is borne by the guiding copper ring and is rotationally and slidably constrained to prevent this radial force from being transmitted to the meshing connection between the spline pair and the spline, thereby avoiding wear of the spline pair.

[0035] The above description of the embodiments in the present invention enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A universal shaft spline positioning device, comprising a shaft body, a spline sleeve, a front positioning plate and a rear positioning plate, wherein the shaft body is coaxially fixed to the rear positioning plate, a spline sleeve is provided on the circumferential spline positioning sleeve of the shaft body, and the spline sleeve is coaxially fixed to the front positioning plate; Features: The shaft body is a hollow shaft, and splines are evenly distributed on the circumferential outer wall of the shaft body, and a shaft neck is formed at one end of the shaft body connected to the front positioning plate; a radially concave annular groove is provided on the shaft neck, and a guide copper ring is circumferentially fixed to the shaft neck and the annular groove; a spline pair that meshes with the splines of the shaft body is provided inside the spline sleeve, one end of the spline sleeve is fixedly connected to the front positioning plate, and the spline sleeve and the front positioning plate cooperate in circumferential rotation and are axially limited and clamped on the guide copper ring.

2. A universal shaft spline positioning device according to claim 1, characterized in that: The guide copper ring comprises a plurality of arc-shaped half hoops spliced ​​together, and the cross-section of each arc-shaped half hoops is a "convex"-shaped structure; the two axial end faces of the guide copper ring are respectively supported on the inner end faces of the front positioning plate and the spline sleeve, and the protrusion on the inner circumference of the guide copper ring is fixed in the ring groove.

3. A universal shaft spline positioning device according to claim 2, characterized in that: The shaft end of the shaft body connected to the front positioning plate is uniformly distributed in the annular direction and axially engaged with a plurality of copper ring positioning bolts, which extend into the annular groove and penetrate the protrusion of the inner circumference of the fixed guide copper ring.

4. A universal shaft spline positioning device according to claim 1, characterized in that: End face splines connecting the force input end and the force output end of the universal joint shaft are uniformly formed on the end faces of the front positioning plate and the rear positioning plate.

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