Elastic telescopic universal shaft capable of being disassembled and maintained

Abstract

The utility model discloses an elastic telescopic universal shaft capable of being disassembled and maintained. The universal shaft comprises a spline sleeve and a spline shaft which are connected through a spline pair. A connecting flange is welded to the end of one side of the spline housing, a blocking cover is detachably arranged on the outer circle of the end of the other side of the spline housing, and a sealing cover is slidably arranged on the outer circle. A guide rod flange is detachably connected to an inner hole of the connecting flange; an inner hole matched with the guide rod flange is formed in the side, corresponding to the guide rod flange, of the spline shaft, a gland is arranged in the inner hole, and an elastic piece is arranged between the guide rod flange and the gland. The sealing cover is connected with a protective cover, and the other end of the protective cover is fixedly connected with the spline shaft. According to the elastic telescopic universal shaft capable of being disassembled and maintained, the spring can be disassembled and replaced only by disassembling the guide rod flange, disassembly and maintenance are convenient, the guide rod flange is simple in structure, it can be guaranteed that the spring is used reliably, the risk that the spring and the guide rod are stuck is reduced, exhaust is convenient and fast, telescopic resistance is reduced, and use is safe and reliable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of transmission technology, concretely relates to a detachable maintenance's elastic telescopic universal shaft. BACKGROUND

[0002] With the rapid development of steel rolling technology, the performance and maintainability of the transmission universal shaft are put forward higher requirements on the site, so that the spring telescopic universal shaft is widely applied on the cold rolling mill and the skin pass mill in the field of steel rolling.

[0003] At present, the existing spring telescopic universal shaft can realize the telescopic freely during installation, and can also realize the operation with load, and is suitable for the cold rolling mill and the skin pass mill for rolling various widths of cold rolling sheet. With the development of cold rolling technology in China and the improvement of rolling speed of rolling mill at home and abroad, the precision and maintainability of the cold rolling transmission shaft are required more strictly, and the biggest problem of the spring telescopic universal shaft is the fatigue failure and jam of the spring, which has higher requirements for the maintenance and use of the spring, and if the operator can replace the spring on the use site, the maintenance cost will be greatly reduced.

[0004] Figure 2The schematic diagram of the prior spring telescopic universal shaft is shown, which comprises a spline shaft 6 and a spline sleeve 5 connected by a spline pair, the spline shaft 6 is provided with a stepped circle 2 outside and a connecting flange 1 for connecting a roller end joint 13 is welded at the stepped circle 2, the spline sleeve 5 is welded with a welded fork 14 for connecting a flange fork 15 at the outer end; the spline shaft 6 is provided with a protective cover 3 outside, a through hole is formed in the middle of the protective cover 3 and a vent plug 12 is installed, a sealing cover 4 is arranged at the end of the protective cover 3, the sealing cover 4 is slidably connected with the spline sleeve 5 outside at the spline pair connection position, an inner hole is formed in the end of the spline shaft 6, a gland 7 is arranged at the bottom of the inner hole, a spring 8 is arranged on the gland 7, a guide rod 9 with a protrusion is arranged at the other end of the spring 8, a limit cover 10 is arranged at the end face of the inner hole of the spline shaft 6, the inner circle of the limit cover 10 is slidably connected with the outer circle of the guide rod 9, and a baffle 11 for blocking the end of the guide rod 9 is further arranged in the spline sleeve 5. The defects of the structure of the prior spring telescopic universal shaft are: (1) when the spring is replaced due to fatigue failure after long-term use of the prior spring telescopic universal shaft, the spline pair needs to be pulled out, and then the spring can be disassembled, which is very inconvenient; and the spline pair has small side clearance, and the phase consistency of the two end fork heads needs to be considered during installation, and the spline pair is difficult to pull out; (2) the prior spring telescopic universal shaft has a complex structure and many designed parts (such as the limit cover and the baffle), the limit cover and the guide rod are slidably connected, and the sliding connection is prone to be stuck, which affects the normal operation of the universal shaft; (3) the vent plug of the prior spring telescopic universal shaft is arranged on the protective cover, and when the universal shaft is telescoped, the gas in the universal shaft needs to pass through the spline pair connection position and then be discharged from the vent plug; since the spline pair has small side clearance and is full of grease, the gas is not easy to discharge, which affects the normal telescoping function. Content of the utility model

[0005] In view of the defects in the background art, the utility model provides a detachable and maintainable elastic telescopic universal shaft, which only needs to disassemble the guide rod flange to realize the disassembly and replacement of the spring, is convenient to disassemble and maintain, has a simple guide rod flange structure, can guarantee the reliable use of the spring, reduces the risk of sticking of the spring and the guide rod, is convenient to exhaust, reduces telescoping resistance, and is safe and reliable to use.

[0006] The technical scheme for solving the technical problems of the utility model is as follows:

[0007] According to one aspect of the present application, a detachable and maintainable elastic telescopic universal shaft is provided, which comprises a spline sleeve and a spline shaft connected through a spline pair; a connecting flange is welded at one side end of the spline sleeve, a blocking cover is detachably arranged at the outer circle of the other side end, and a sealing cover is slidably arranged on the outer circle of the blocking cover; a guide rod flange is detachably connected in the inner hole of the connecting flange; an inner hole corresponding to the guide rod flange is formed at one side of the spline shaft, and a gland is arranged in the inner hole, and an elastic member is arranged between the guide rod flange and the gland; a protective cover is connected to the sealing cover, and the other end of the protective cover is fixedly connected to the spline shaft.

[0008] Further, an air passage is formed in the connecting flange and connected to one side of the spline pair connection between the spline sleeve and the spline shaft, and an air inlet is provided with an air plug.

[0009] Further, the elastic member is a spring.

[0010] Further, the gland is interference-fitted with the inner hole of the spline shaft.

[0011] Further, the tooth side gap of the spline pair connection between the spline shaft and the spline sleeve is 0.1-0.3mm.

[0012] Further, a through hole is formed in the spline sleeve at the connection with the spline shaft, and an oil nozzle is installed.

[0013] Further, the connecting flange is connected with a roller end joint through a double-headed bolt, the spline shaft is welded with a connecting pipe at the outer end, the other end of the connecting pipe is welded with a welding fork, and the welding fork is movably connected with a flange fork.

[0014] Further, the sealing cover is fixedly connected with the protective cover through screws.

[0015] Further, the blocking cover is fixedly connected with the spline sleeve through screws.

[0016] Further, the guide rod flange is fixedly connected with the connecting flange through screws.

[0017] Compared with the prior art, the detachable and maintainable elastic telescopic universal shaft provided by the present application has the following advantages:

[0018] (1) The present application has novel design and simple structure, when the spring needs to be replaced, only the guide rod flange at the connecting flange needs to be disassembled after the roller end assembly is disassembled, and the spring can be replaced without plugging the spline pair, which is very convenient to disassemble and assemble, saves time and labor, and reduces maintenance cost.

[0019] (2) The utility model discloses relative to prior art structure, its reduced limit cover, baffle etc. Part, and reduced sliding pair (the relative sliding of guide rod and limit cover) of sliding movement, both optimized universal shaft structure, and reduced the risk of guide rod jam when universal shaft telescoping.

[0020] (3) The utility model discloses the vent plug is set up on the connecting flange, and is communicated with the one side of spline pair connection through the gas path of setting up, more easily ventilate, reduce telescoping resistance.

[0021] (4) The utility model discloses through setting up the baffle, when universal shaft telescoping to maximum, baffle is pressed against the sealing cover, can be limited to spline telescoping, convenient transportation, on -the -spot installation and use, spline shaft and spline bushing will not appear the situation of falling off. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is main body structure diagram of the utility model;

[0023] Figure 1 Middle: 1, connecting flange;2, guide rod flange;3, elastic part;4, gland;5, spline sleeve;6, spline shaft;7, vent plug;8, sealing cover;9, protective cover;10, baffle;11, connecting pipe;12, double head bolt;13, roller end joint;14, welding fork;15, flange fork;16, oil nozzle;17, gas path.

[0024] Figure 2 It is schematic diagram of prior art spring telescoping universal shaft;

[0025] Figure 2 Middle: 1, connecting flange;2, step circle;3, protective cover;4, sealing cover;5, spline sleeve;6, spline shaft;7, gland;8, spring;9, guide rod;10, limit cover;11, baffle;12, vent plug;13, roller end joint;14, welding fork;15, flange fork. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application. Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the common meanings by those skilled in the art to which the present application belongs. The "upper", "lower", "left", "right", "front", "back", "inner", "outer" and the like used in the patent application specification and claims of the present application are only used to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships are also changed accordingly. The present application does not describe the known technology in the technical field.

[0027] As shown in Figure 1 The present application provides a detachable and maintainable elastic universal shaft, which comprises a connecting flange 1, a guide rod flange 2, an elastic member 3, a gland 4, a spline sleeve 5, a spline shaft 6, an air vent plug 7, a sealing cover 8, a protective cover 9 and a cover 10.

[0028] The spline sleeve 5 and the spline shaft 6 are connected through the spline pair respectively having matching inner and outer splines; the connecting flange 1 is welded on one side end of the spline sleeve 5, and the cover 10 is detachably arranged on the outer circle of the other side end of the spline sleeve 5 through screws, the cover 10 protrudes from the outer circle of the spline sleeve, and the sealing cover 8 is slidably arranged on the outer circle of the spline sleeve 5; the guide rod flange 2 is detachably connected to the inner hole of the connecting flange 1 through screws; the spline shaft 6 is provided with an inner hole corresponding to the guide rod flange 2 on one side, and the gland 4 is arranged in the inner hole through interference shrink fitting, and the elastic member 3 is arranged between the guide rod flange 2 and the gland 4, and the elastic member 3 is preferably a spring; the protective cover 9 is connected to the sealing cover 8 through screws, and the other end of the protective cover 9 is connected and fixed to the spline shaft 6.

[0029] In order to facilitate the gas in and out of the universal shaft during the extension and contraction of the universal shaft, the connecting flange 1 is provided with an air channel 17 connected to one side of the spline pair connection position of the spline sleeve 5 and the spline shaft 6, and the air vent plug 7 is arranged at the inlet of the air channel 17. In a further embodiment, the connection position of the spline sleeve 5 and the air channel 17 can be formed as a stepped hole with an inner diameter larger than the inner spline.

[0030] In the embodiment, the tooth side gap of the spline pair connection of the spline shaft 6 and the spline sleeve 5 is preferably 0.1-0.3mm.

[0031] In order to facilitate the lubrication of the spline connection position, the spline sleeve 5 is provided with a through hole at the connection position with the spline shaft 6 and is provided with an oil nozzle 16.

[0032] As a preferred embodiment, the connecting flange 1 is connected with the roller end joint 13 through the stud bolt 12, the outer end of the spline shaft 6 is welded with the connecting pipe 11, the other end of the connecting pipe 11 is welded with the welding fork 14, and the flange fork 15 is movably connected on the welding fork 14.

[0033] When the detachable maintenance elastic telescopic universal shaft is maintained, the roller end joint is first disassembled, then the guide rod flange is disassembled, and the spring can be replaced, without plugging and unplugging the spline shaft and the spline sleeve, so that the disassembly and assembly are convenient.

Claims

1. A demountably serviceable elastic flexure universal shaft characterized by, The application relates to a spline sleeve (5) and a spline shaft (6) connected through a spline pair; one side end of the spline sleeve (5) is welded with a connecting flange (1), the other side end is detachably provided with a cover (10) at the outer circle, the outer circle is slidably provided with a sealing cover (8); the connecting flange (1) is detachably connected with a guide rod flange (2) at the inner hole; the spline shaft (6) is provided with an inner hole corresponding to the guide rod flange (2) at one side, the inner hole is provided with a gland (4), the guide rod flange (2) and the gland (4) are provided with an elastic element (3); the sealing cover (8) is connected with a protective cover (9), the other end of the protective cover (9) is connected with the spline shaft (6).

2. A demountably mounted resilient gimbal shaft according to claim 1, wherein, The connecting flange (1) is provided with an air channel (17) connected with one side of the spline sleeve (5) and the spline shaft (6) spline pair connection, the air channel (17) is provided with an air plug (7) at the inlet.

3. A maintenance removable elastic expansion gimbal shaft according to claim 1, characterized in that, The elastic element (3) is a spring.

4. The maintenance removable elastic expansion gimbal shaft according to claim 1, characterized in that, The gland (4) is in interference fit with the inner hole of the spline shaft (6).

5. The maintenance removable elastic expansion gimbal shaft according to claim 1, wherein, The spline pair connection gap between the spline shaft (6) and the spline sleeve (5) is 0.1-0.3mm.

6. The maintenance removable elastic expansion gimbal shaft according to claim 1, wherein, The spline sleeve (5) is provided with a through hole at the connection with the spline shaft (6) and is provided with an oil nozzle (16).

7. The maintenance removable elastic expansion gimbal shaft according to claim 1, characterized in that, The connecting flange (1) is connected with a roller end joint (13) through a double-end bolt (12), the spline shaft (6) is welded with a connecting pipe (11) at the outer end, the other end of the connecting pipe (11) is welded with a welding fork (14), the welding fork (14) is movably connected with a flange fork (15).

8. The maintenance removable elastic expansion gimbal shaft according to claim 1, characterized in that, The sealing cover (8) is connected with the protective cover (9) through screws.

9. The maintenance-free, resiliently flexible universal shaft of claim 1 wherein, The cover (10) is connected with the spline sleeve (5) through screws.

10. The maintenance removable elastic expansion gimbal shaft according to claim 1, characterized in that, The guide rod flange (2) is connected with the connecting flange (1) through screws. The guide rod flange (2) is connected with the connecting flange (1) through screws.

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