Universal transmission shaft

Abstract

The utility model belongs to the technical field of transmission shafts, and provides a universal transmission shaft which comprises a shaft body and an elastic piece arranged on the outer surface of the shaft body in a sleeved mode, the shaft body comprises a first shaft head and a second shaft head which are hinged to each other, and a first connecting lug is arranged at the end, close to the second shaft head, of the first shaft head. A second connecting lug is arranged at the end, close to the first shaft head, of the second shaft head, the first connecting lug and the second connecting lug are arranged in a crossed mode, the two ends of the elastic piece are connected with the first shaft head and the second shaft head respectively, and the first connecting lug and the second connecting lug are arranged in the elastic piece. The outer surface of the shaft body is sleeved with the elastic piece, the elastic piece can provide supporting force for the shaft body, the bending degree of the shaft body is reduced when the shaft body is horizontally placed, butt joint with other external rotating parts is facilitated, and the elastic piece has certain flexibility in the transmission process and cannot interfere with transmission of the universal transmission shaft; the elastic piece wraps the hinged position of the first shaft head and the second shaft head, the hand of a worker can be prevented from making contact with the hinged position during butt joint, and safety is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission shaft technical field, especially relates to a universal transmission shaft. BACKGROUND

[0002] Universal transmission shaft is a most commonly used coupling. Its structure characteristics can make two shafts with different axes or large angle of axis or large axial movement rotate continuously at the same angular speed, and reliably transmit torque and motion. It can be widely applied to transmission of torque in mechanical shafting of hoisting, engineering transportation, mine, petroleum, ship, coal, rubber, papermaking machinery and other heavy machinery industries.

[0003] In the cloth reel, the reel of the cloth needs to be disassembled frequently, in order to ensure the reliability of transmission, the universal transmission shaft is usually used for transmission connection between the reel of the cloth and the power source. However, since the universal transmission shaft has flexibility, under the action of its own gravity, the transmission end will sag when it is not connected with the reel, so that the universal transmission shaft needs to be lifted when the reel is connected with the universal transmission shaft, so that the two ends are approximately straight, so that the operation of connecting the reel with the universal transmission shaft is more complicated, and two workers need to operate mutually.

[0004] The technical problem to be solved by the utility model is how to solve the problem of inconvenient operation and safety hazard of the existing universal transmission shaft. CONTENT OF UTILITY MODEL

[0005] In order to overcome the defects of the prior art, the utility model aims at providing a universal transmission shaft which has the advantages of simple structure, convenient connection and good safety performance.

[0006] The utility model adopts the technical scheme of: a universal transmission shaft, comprising a shaft body and an elastic member sleeved on the outer surface of the shaft body, the shaft body comprises a first shaft head and a second shaft head which are hingedly connected with each other, the first shaft head is provided with a first connecting lug at one end close to the second shaft head, the second shaft head is provided with a second connecting lug at one end close to the first shaft head, the first connecting lug and the second connecting lug are cross-shaped, the two ends of the elastic member are connected with the first shaft head and the second shaft head respectively, and the first connecting lug and the second connecting lug are arranged in the elastic member.

[0007] The universal transmission shaft of the present application, by sleeving the elastic member on the outer surface of the shaft body, and connecting the two ends of the elastic member with the first shaft head and the second shaft head respectively, when the shaft body is horizontally arranged, the elastic body can provide support force for the shaft body, reduce the degree of bending of the shaft body, facilitate the docking of the universal transmission shaft with other rotating parts outside, that is, reduce the difficulty of docking the universal transmission shaft with other parts, simplify the operation; and in the transmission process, since the elastic body itself has a certain flexibility, it will not interfere with the transmission of the universal transmission shaft; in addition, since the elastic member is wrapped around the hinge of the first shaft head and the second shaft head, it can prevent the worker's hand from contacting the hinge during docking, which is safer.

[0008] In some embodiments, the radial elastic force of the elastic member is greater than or equal to the gravity of the shaft body.

[0009] With the above technical solution, it can be ensured that when the shaft body is placed horizontally, the first shaft head and the second shaft head can maintain a coaxial or nearly coaxial state, facilitating the docking of the universal transmission shaft with the outside.

[0010] In some embodiments, the elastic member includes a first fixed segment, a second fixed segment, and a connecting segment, one end of the first fixed segment is fixedly connected with the first shaft head, and the other end is fixedly connected with the connecting segment, one end of the second fixed segment is fixedly connected with the second shaft head, and the other end is fixedly connected with the other end of the connecting segment.

[0011] With the above technical solution, the displacement of the elastic member after being sleeved can be avoided, and the normal activity of the shaft body can be prevented from being affected by the elastic member.

[0012] In some embodiments, the inner diameter of the connecting segment is greater than the outer diameter of the first connecting lug and the second connecting lug.

[0013] With the above technical solution, it can be ensured that the first connecting lug and the second connecting lug can automatically swing, and interference caused by the elastic body to the automatic rotation of the hinge of the first shaft head and the second shaft head can be avoided.

[0014] In some embodiments, the inner diameter of the first fixed segment gradually increases from the end close to the first shaft head to the end close to the connecting segment, and the inner diameter of the second fixed segment gradually increases from the end close to the second shaft head to the end close to the connecting segment.

[0015] With the above technical solution, the first fixed segment of such structure can be ensured to be fixedly connected with the first shaft head and can be connected with the connecting segment in sequence, and similarly, the second fixed segment of the above structure can be ensured to be connected with the second shaft head and can be connected with the connecting segment in sequence.

[0016] In some embodiments, the first fixed segment and the first shaft head are fixedly connected by welding, and the second fixed segment and the second shaft head are fixedly connected by welding.

[0017] By adopting the above technical solution, welding fixation can ensure that the elastomer will not be displaced in the axial direction of the shaft, thus ensuring high reliability.

[0018] In some embodiments, the shaft also includes a reinforcing member disposed between the first connecting ear and the second connecting ear. The first connecting ear and the reinforcing member are connected by a first pin, and the second connecting ear and the reinforcing member are connected by a second pin.

[0019] By adopting the above technical solution, the reinforcing member can improve the strength of the first connecting ear and the second connecting ear, reduce the possibility of deformation of the first connecting ear and the second connecting ear, and ensure transmission accuracy.

[0020] In some embodiments, the shaft body further includes a transition section built into the elastic element. The two ends of the transition section are respectively hinged to the first shaft head and the second shaft head. The two ends of the transition section are respectively provided with a third connecting ear and a fourth connecting ear. The third connecting ear and the first connecting ear are arranged in a cross shape, and the fourth connecting ear and the second connecting ear are arranged in a cross shape.

[0021] By adopting the above technical solution, one or more transition sections can be added as needed to increase the overall length of the shaft, so that the universal drive shaft can be used in different occasions.

[0022] In some embodiments, the end of the first shaft head away from the first connecting ear is provided with a first keyway.

[0023] The above technical solution facilitates the connection between the first shaft head and the outside.

[0024] In some embodiments, the end of the second shaft head away from the second connecting ear is provided with a connecting hole, and a second keyway is provided in the connecting hole.

[0025] The above technical solution facilitates the connection between the second shaft head and the outside. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a universal drive shaft according to a preferred embodiment of the present invention;

[0027] Figure 2 for Figure 1 A schematic diagram of the axial cross-section of the universal joint drive shaft is shown.

[0028] Figure 3 for Figure 1 The diagram shows an exploded view of the shaft and elastic element of the universal drive shaft.

[0029] In the diagram: 100, universal drive shaft; 10, shaft body; 11, first shaft end; 111, first connecting ear; 112, first keyway; 12, second shaft end; 121, second connecting ear; 122, connecting hole; 123, second keyway; 13, reinforcing member; 14, transition section; 141, third connecting ear; 142, fourth connecting ear; 20, elastic member; 21, first fixed section; 22, second fixed section; 23, connecting section. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. When the number of elements is referred to as "multiple," it can be any number of two or more. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Please see Figures 1 to 3A preferred embodiment of the present invention provides a universal drive shaft 100, comprising a shaft body 10 and an elastic element 20 sleeved on the outer surface of the shaft body 10. The shaft body 10 includes a first shaft head 11 and a second shaft head 12 hinged to each other. The first shaft head 11 is provided with a first connecting ear 111 at one end near the second shaft head 12, and the second shaft head 12 is provided with a second connecting ear 121 at one end near the first shaft head 11. The first connecting ear 111 and the second connecting ear 121 are arranged in a cross shape. The two ends of the elastic element 20 are respectively connected to the first shaft head 11 and the second shaft head 12, and the first connecting ear 111 and the second connecting ear 121 are built into the elastic element 20. The universal drive shaft 100 of this application, by sleeved with an elastic element 20 on the outer surface of the shaft body 10, and with the two ends of the elastic element 20 connected to the first shaft head 11 and the second shaft head 12 respectively, provides support for the shaft body 10 when the shaft body 10 is horizontally set, reducing the degree of bending of the shaft body 10 and facilitating docking of the universal drive shaft 100 with other external rotating parts, thereby reducing the difficulty of docking the universal drive shaft 100 with other parts and simplifying operation; moreover, during the transmission process, since the elastic element itself has a certain degree of flexibility, it will not interfere with the transmission of the universal drive shaft 100; in addition, since the elastic element 20 is wrapped around the hinge of the first shaft head 11 and the second shaft head 12, it can prevent the worker's hand from touching the hinge during docking, making it safer.

[0034] Preferably, in this embodiment, the elastic element 20 is a helical spring, and in order to avoid interference between the elastic element 20 and the shaft 10 and the external connection, the overall length of the elastic element 20 is shorter than the overall length of the shaft 10, that is, the first shaft head 11 and the second shaft head 12 are provided with protruding elastic elements.

[0035] Preferably, the radial elastic force of the elastic element 20 is greater than or equal to the weight of the shaft 10. This ensures that when the shaft 10 is placed horizontally, the first shaft head 11 and the second shaft head 12 can remain coaxial or nearly coaxial, facilitating the docking of the universal drive shaft 100 with the outside.

[0036] Furthermore, the elastic element 20 includes a first fixed section 21, a second fixed section 22, and a connecting section 23. One end of the first fixed section 21 is fixedly connected to the first shaft head 11, and the other end is fixedly connected to the connecting section 23. One end of the second fixed section 22 is fixedly connected to the second shaft head 12, and the other end is fixedly connected to the other end of the connecting section 23. This structure of the elastic element 20 can prevent the elastic element 20 from moving after it is installed, and prevent the elastic element 20 from affecting the normal movement of the shaft body 10.

[0037] Preferably, the inner diameter of the connecting segment 23 is larger than the outer diameter of the first connecting ear 111 and the second connecting ear 121. This ensures that the first connecting ear 111 and the second connecting ear 121 can swing automatically, avoiding interference from the elastic body on the automatic rotation of the hinge between the first shaft head 11 and the second shaft head 12.

[0038] Furthermore, the inner diameter of the first fixed section 21 gradually increases from the end near the first shaft head 11 to the end near the connecting section 23, and the inner diameter of the second fixed section 22 gradually increases from the end near the second shaft head 12 to the end near the connecting section 23. This structure ensures that the first fixed section 21 is fixedly connected to the first shaft head 11 and can be smoothly connected to the connecting section 23. Similarly, the second fixed section 22, with the same structure, ensures connection to the second shaft head 12 and can be smoothly connected to the connecting section 23.

[0039] Preferably, the inner diameter of the end of the first fixed section 21 away from the connecting section 23 is slightly larger than or equal to the outer diameter of the first shaft head 11, so as to facilitate the connection and fixation of the first fixed section 21 and the first shaft head 11; similarly, the inner diameter of the end of the second fixed section 22 away from the connecting section 23 is slightly larger than or equal to the outer diameter of the second shaft head 12.

[0040] Preferably, the first fixed section 21 is fixed to the first shaft head 11 by welding, and the second fixed section 22 is fixed to the second shaft head 12 by welding. Welding ensures that the elastomer will not shift axially in the shaft body 10, thus ensuring high reliability.

[0041] In one embodiment, the shaft 10 further includes a reinforcing member 13, which is disposed between the first connecting ear 111 and the second connecting ear 121. The first connecting ear 111 and the reinforcing member 13 are connected by a first pin, and the second connecting ear 121 and the reinforcing member 13 are connected by a second pin. The reinforcing member 13 can improve the strength of the first connecting ear 111 and the second connecting ear 121, reduce the possibility of deformation of the first connecting ear 111 and the second connecting ear 121, and ensure transmission accuracy.

[0042] Furthermore, the contact surfaces of the reinforcing member 13 with the first connecting ear 111 and the second connecting ear 121 are planar, and the reinforcing member 13 contacts the inner side of the first connecting ear 111 and the second connecting ear 121.

[0043] In one embodiment, the shaft 10 further includes a transition section 14 built into the elastic member 20. The two ends of the transition section 14 are hinged to the first shaft head 11 and the second shaft head 12, respectively. The two ends of the transition section 14 are respectively provided with a third connecting ear 141 and a fourth connecting ear 142. The third connecting ear 141 is arranged in a cross shape with the first connecting ear 111, and the fourth connecting ear 142 is arranged in a cross shape with the second connecting ear 121. One or more transition sections 14 can be added as needed to increase the overall length of the shaft 10, making the universal drive shaft 100 suitable for different applications.

[0044] Preferably, a reinforcing member 13 is provided between the first connecting ear 111 and the third connecting ear 141, and a reinforcing member 13 is also provided between the second connecting ear 121 and the fourth connecting ear 142.

[0045] In one embodiment, the end of the first shaft head 11 away from the first connecting ear 111 is provided with a first keyway 112. This arrangement facilitates the connection of the first shaft head 11 to the outside.

[0046] In one embodiment, the end of the second shaft head 12 away from the second connecting lug 121 is provided with a connecting hole 122, and a second keyway 123 is provided in the connecting hole 122. This arrangement facilitates the connection of the second shaft head 12 to the outside.

[0047] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A universal drive shaft, characterized in that: The device includes a shaft (10) and an elastic element (20) sleeved on the outer surface of the shaft (10). The shaft (10) includes a first shaft head (11) and a second shaft head (12) that are hinged to each other. The first shaft head (11) has a first connecting ear (111) at one end near the second shaft head (12), and the second shaft head (12) has a second connecting ear (121) at one end near the first shaft head (11). The first connecting ear (111) and the second connecting ear (121) are arranged in a cross shape. The two ends of the elastic element (20) are respectively connected to the first shaft head (11) and the second shaft head (12). The first connecting ear (111) and the second connecting ear (121) are built into the elastic element (20).

2. The universal drive shaft according to claim 1, characterized in that, The radial elastic force of the elastic element (20) is greater than or equal to the weight of the shaft (10).

3. The universal drive shaft according to claim 1, characterized in that, The elastic element (20) includes a first fixed section (21), a second fixed section (22) and a connecting section (23). One end of the first fixed section (21) is fixed to the first shaft head (11) and the other end is fixed to the connecting section (23). One end of the second fixed section (22) is fixed to the second shaft head (12) and the other end is fixed to the other end of the connecting section (23).

4. The universal drive shaft according to claim 3, characterized in that, The inner diameter of the connecting segment (23) is greater than the outer diameter of the first connecting ear (111) and the second connecting ear (121).

5. The universal drive shaft according to claim 4, characterized in that, The inner diameter of the first fixed section (21) gradually increases from the end near the first shaft head (11) to the end near the connecting section (23), and the inner diameter of the second fixed section (22) gradually increases from the end near the second shaft head (12) to the end near the connecting section (23).

6. The universal drive shaft according to claim 3, characterized in that, The first fixed section (21) is fixed to the first shaft head (11) by welding, and the second fixed section (22) is fixed to the second shaft head (12) by welding.

7. The universal drive shaft according to claim 1, characterized in that, The shaft (10) also includes a reinforcing member (13), which is disposed between a first connecting ear (111) and a second connecting ear (121). The first connecting ear (111) and the reinforcing member (13) are connected by a first pin, and the second connecting ear (121) and the reinforcing member (13) are connected by a second pin.

8. The universal drive shaft according to claim 1, characterized in that, The shaft (10) also includes a transition section (14) built into the elastic member (20). The two ends of the transition section (14) are respectively hinged to the first shaft head (11) and the second shaft head (12). The two ends of the transition section (14) are respectively provided with a third connecting ear (141) and a fourth connecting ear (142). The third connecting ear (141) is arranged in a cross shape with the first connecting ear (111), and the fourth connecting ear (142) is arranged in a cross shape with the second connecting ear (121).

9. The universal drive shaft according to claim 1, characterized in that, The first keyway (112) is provided at the end of the first shaft head (11) away from the first connecting ear (111).

10. The universal drive shaft according to claim 1, characterized in that, The second shaft head (12) has a connecting hole (122) at one end away from the second connecting ear (121), and a second keyway (123) is provided in the connecting hole (122).

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