Rotating shaft assembly

Abstract

The utility model relates to the field of rotating shafts, and provides a rotating shaft assembly which comprises a rotating shaft body and a concentric sleeve, the rotating shaft body comprises a connecting part and a rotating part, the connecting part is used for being connected with a component, and the rotating part is connected to the end of the connecting part; the rotating part is sleeved with the concentric sleeve, the inner wall of the concentric sleeve is provided with an abutting air bag, the abutting air bag is provided with a connecting face and an abutting face, the connecting face is used for being connected with the concentric sleeve, and the abutting face is used for being connected with the rotating part in an abutting mode. The rotating shaft has the effect that the problem that the connecting position of the rotating shaft is loosened along with the increase of the use time is solved.

Description

Technical Field

[0001] The present application relates to the field of rotating shafts, and in particular to a rotating shaft assembly. Background Art

[0002] As a common transmission element in mechanical equipment, shafts are widely used in various scenarios that require rotation or flipping. However, traditional shaft designs often rely on threaded connections, keyway connections, or fastener connections.

[0003] As the use time increases, the shaft connection will become loose due to impact loads, continuous vibration, etc. The looseness of the shaft connection not only affects the performance and life of the equipment, but may also cause safety problems. Utility Model Content

[0004] In order to improve the problem of loosening of the shaft connection as the use time increases, the present application provides a shaft assembly.

[0005] The present application provides a rotating shaft assembly adopting the following technical solution:

[0006] A rotating shaft assembly includes a rotating shaft body and a concentric sleeve, wherein the rotating shaft body includes a connecting portion and a rotating portion, wherein the connecting portion is used to connect to a component, and the rotating portion is connected to the end of the connecting portion; the concentric sleeve is sleeved on the rotating portion, and an abutment airbag is provided on the inner wall of the concentric sleeve, wherein the abutment airbag has a connecting surface and an abutment surface, wherein the connecting surface is used to connect to the concentric sleeve, and the abutment surface is used to abut against the rotating portion.

[0007] By adopting the above technical solution, after a certain period of use, when there is some looseness between the rotating shaft body and the concentric sleeve, air is inflated into the airbag to ensure the abutment force between the abutment airbag and the rotating shaft, thereby ensuring the indirect abutment force between the rotating shaft body and the concentric sleeve, thereby improving the problem of looseness at the connection position of the rotating shaft as the use time increases; in addition, when installing the rotating shaft body on the concentric sleeve, the gas in the airbag is released first to facilitate the installation of the rotating shaft body.

[0008] Optionally, the abutting surface is connected to an abutting sheet, and the abutting sheet is used for abutting the rotating part, and the hardness of the abutting sheet is greater than the hardness of the abutting airbag.

[0009] By adopting the above technical solution, a contact sheet is used to form a partition between the flexible contact airbag and the rotating part, so that when the rotating part rotates, the object directly rubbed is the contact sheet with greater hardness, which makes it easier for the rotating part to rotate relative to the contact airbag, thereby improving the smoothness of the rotation of the shaft body.

[0010] Optionally, the abutment sheet is detachably connected to the abutment airbag.

[0011] By adopting the above technical solution, it is convenient to replace abutment sheets of different materials and thicknesses according to the diameter of the shaft and the application scenario of the shaft assembly.

[0012] Optionally, the abutting surface and the abutting sheet are made of magnetic material.

[0013] By adopting the above technical solution, the contact piece and the soft magnet are connected by magnetic attraction, and the structure is simple and easy to disassemble and assemble.

[0014] Optionally, a plurality of abutment airbags are provided, and the plurality of abutment airbags are arranged at intervals around the central axis of the concentric sleeve; a plurality of abutment plates are provided, and the plurality of abutment plates correspond one-to-one to the plurality of abutment airbags; and the abutment plates are connected to the concentric sleeve along the radial sliding direction of the concentric sleeve.

[0015] By adopting the above technical solution, the abutment sheet can move along the radial direction of the concentric sleeve to ensure the abutment force between the abutment sheet and the rotating part, thereby further reducing the risk of loosening of the shaft body.

[0016] Optionally, the inner wall of the concentric sleeve is connected to a receiving piece, the receiving piece is located in the gap between adjacent abutment airbags, and the receiving piece is provided with a sliding groove along the radial direction of the concentric sleeve; the surface of the abutment sheet facing the abutment airbag is connected to a sliding piece, and the sliding groove is used for the sliding piece to be plugged in.

[0017] By adopting the above technical solution, the sliding connection between the abutment sheet and the concentric sleeve is achieved by utilizing the cooperation between the sliding member and the sliding groove, and the structure is simple and relatively light.

[0018] Optionally, the accommodating member is extended along the length direction of the concentric sleeve, and one end of the sliding groove passes through the end surface of the accommodating member; the end of the accommodating member is connected to a blocking member, and the blocking member is used to block the end of the sliding groove.

[0019] By adopting the above technical solution, after the sliding member is inserted into the sliding groove, the blocking member is connected to the accommodating member to prevent the abutment piece from falling off from the concentric sleeve along the length direction of the concentric sleeve, thereby improving the connection stability between the abutment piece and the concentric sleeve.

[0020] Optionally, the contact sheet is elastic.

[0021] By adopting the above technical solution, a slight adaptive deformation can be easily generated when the abutment piece moves relative to the concentric sleeve.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. By setting an abutment airbag on the inner wall of the concentric sleeve, gas is introduced into the abutment airbag when the shaft body becomes loose, so as to ensure the abutment force between the shaft body and the concentric sleeve, thereby improving the problem of loosening of the shaft connection as the use time increases;

[0024] 2. By providing an abutment sheet between the abutment airbag and the connecting portion, the rotating portion can be more easily rotated relative to the abutment airbag, thereby improving the smoothness of the rotation of the rotating shaft body;

[0025] 3. The abutment sheet is connected to the concentric sleeve by sliding along the radial direction of the concentric sleeve, so that the concentric sleeve is suitable for connecting parts with different diameters, thereby improving the use flexibility of the rotating shaft assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of Example 1 of the present application.

[0027] Figure 2 It is a schematic diagram for showing the installation position of the airbag in Example 1.

[0028] Figure 3 It is a structural diagram of Example 2 of the present application.

[0029] Figure 4 It is a structural diagram of Example 3 of the present application.

[0030] Figure 5 It is a schematic diagram for showing the connection relationship between the sliding member and the receiving member in Example 3.

[0031] Explanation of the accompanying drawings: 1. shaft body; 11. connecting part; 12. rotating part; 2. concentric sleeve; 21. accommodating member; 211. sliding groove; 212. blocking member; 3. abutting airbag; 31. connecting surface; 32. abutting surface; 33. pressure sensor; 34. soft magnet; 4. abutting sheet; 41. sliding member. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-5 This application is described in further detail.

[0033] An embodiment of the present application discloses a rotating shaft assembly.

[0034] Example 1

[0035] Reference Figure 1 and Figure 2A shaft assembly includes a shaft body 1 and a concentric sleeve 2. The shaft body 1 includes a connecting portion 11 and a rotating portion 12. The connecting portion 11 is used to connect with other components, and the rotating portion 12 is connected to the end of the connecting portion 11. The concentric sleeve 2 is sleeved on the rotating portion 12. The inner wall of the concentric sleeve 2 is provided with an abutting airbag 3. The abutting airbag 3 has a connecting surface 31 and an abutting surface 32. The connecting surface 31 is used to connect with the concentric sleeve 2, and the abutting surface 32 is used to abut with the rotating portion 12.

[0036] After a certain period of use, when there is some looseness between the shaft body 1 and the concentric sleeve 2, the airbag is inflated to ensure the abutment force between the abutment airbag 3 and the shaft, thereby ensuring the indirect abutment force between the shaft body 1 and the concentric sleeve 2, thereby improving the problem of looseness at the connection position of the shaft as the use time increases; in addition, when installing the shaft body 1 on the concentric sleeve 2, the gas in the airbag is released first to facilitate the installation of the shaft body 1.

[0037] In this embodiment, the connecting portion 11 and the rotating portion 12 are integrally formed. In other embodiments, the connecting portion 11 and the rotating portion 12 may also be connected by bonding, welding or bolting.

[0038] In this embodiment, the abutting airbag 3 and the concentric sleeve 2 are fixed by bonding.

[0039] The abutting surface 32 is connected with a pressure sensor 33, which is used to detect the abutting pressure signal between the abutting airbag 3 and the connecting portion 11, and send the pressure signal to the control terminal. The control terminal inflates or deflates the abutting airbag 3 according to the change of the pressure signal.

[0040] The implementation principle of Example 1 is: when assembling the shaft assembly, the gas in the abutment airbag 3 is first released, and then the connecting portion 11 of the shaft body 1 is inserted into the concentric sleeve 2, and then the abutment airbag 3 is filled with gas so that the abutment airbag 3 is tightly against the connecting portion 11.

[0041] During the use of the shaft assembly, the control terminal obtains the pressure signal between the abutment airbag 3 and the shaft body 1 through the pressure sensor 33, and determines whether there is looseness between the shaft body 1 and the concentric sleeve 2 through the pressure signal, and inflates the abutment airbag 3 in time, thereby improving the problem that the connection of the shaft is prone to loosening as the use time increases.

[0042] Example 2

[0043] Reference Figure 3The difference between this embodiment and the embodiment 1 is that the abutting surface 32 is connected with an abutting sheet 4, and the abutting sheet 4 is used for the rotating part 12 to abut, and the hardness of the abutting sheet 4 is greater than the hardness of the abutting airbag 3. Therefore, the abutting sheet 4 is used to form a partition between the flexible abutting airbag 3 and the rotating part 12, so that when the rotating part 12 rotates, the object directly rubbed is the abutting sheet 4 with greater hardness, that is, the rotating part 12 is easier to rotate relative to the abutting airbag 3, and the smoothness of the rotation of the shaft body 1 is improved.

[0044] Furthermore, the abutment sheet 4 and the abutment airbag 3 are detachably connected, so that the abutment sheet 4 of different materials and thicknesses can be replaced according to the diameter of the shaft and the application scenario of the shaft assembly.

[0045] Specifically, in this embodiment, the abutting surface 32 of the abutting airbag 3 is bonded and fixed with a soft magnet 34, the abutting sheet 4 is made of magnetic material, and the abutting sheet 4 and the soft magnet 34 are connected by magnetic attraction, which has a simple structure and is easy to disassemble and assemble.

[0046] Example 3

[0047] Reference Figure 4 The difference between this embodiment and embodiment 1 is that a plurality of abutment airbags 3 are provided, the abutment airbags 3 are extended along the length direction of the concentric sleeve 2, and the plurality of abutment airbags 3 are arranged at intervals around the central axis of the concentric sleeve 2.

[0048] An abutment sheet 4 is provided between the abutment airbag 3 and the shaft body 1, and the abutment sheet 4 is connected to the inner wall of the concentric sleeve 2 by sliding along the radial direction of the concentric sleeve 2. A plurality of abutment sheets 4 are provided, and the plurality of abutment sheets 4 are arranged at intervals around the central axis of the concentric sleeve 2, and the plurality of abutment sheets 4 abut against the plurality of abutment airbags 3 one by one. Thus, the abutment sheet 4 can move along the radial direction of the concentric sleeve 2 to ensure the abutment force between the abutment sheet 4 and the rotating part 12, and further reduce the risk of the shaft body 1 loosening.

[0049] It is understandable that, in this embodiment, the contact piece 4 is made of elastic material, such as rubber, plastic, etc., so that the contact piece 4 can undergo slight adaptive deformation when it moves relative to the concentric sleeve 2 .

[0050] Reference Figure 4 and Figure 5In this embodiment, the specific structure of the connection between the contact piece 4 and the concentric sleeve 2 is as follows: the inner wall of the concentric sleeve 2 is fixedly connected with a receiving member 21, the receiving member 21 is extended along the length direction of the concentric sleeve 2, and the receiving member 21 is provided with a sliding groove 211 along its length direction. The surface of the contact piece 4 facing the contact airbag 3 is fixedly connected with a sliding member 41, and the sliding groove 211 is used for the sliding member 41 to slide and connect, so that the sliding connection between the contact piece 4 and the concentric sleeve 2 is realized by the cooperation between the sliding member 41 and the sliding groove 211, and the structure is simple and relatively light.

[0051] In this embodiment, one end of the sliding groove 211 passes through the end surface of the accommodating member 21 to facilitate inserting the sliding member 41 into the sliding groove 211 from the end of the sliding groove 211 along the length direction of the concentric sleeve 2 to facilitate connecting the abutment plate 4 to the concentric sleeve 2.

[0052] The end of the sliding groove 211 is bonded and fixed with a plugging member 212, which is used to plug the end of the sliding groove 211. After the sliding member 41 is inserted into the sliding groove 211, the plugging member 212 is connected to the receiving member 21 to prevent the abutting piece 4 from falling off from the concentric sleeve 2 along the length direction of the concentric sleeve 2, thereby improving the connection stability between the abutting piece 4 and the concentric sleeve 2.

[0053] The connection method between the blocking member 212 and the receiving member 21 includes, but is not limited to, welding, bonding, etc.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rotating shaft assembly, characterized in that: The invention comprises a rotating shaft body (1) and a concentric sleeve (2), wherein the rotating shaft body (1) comprises a connecting portion (11) and a rotating portion (12), wherein the connecting portion (11) is used to connect to a component, and the rotating portion (12) is connected to the end of the connecting portion (11); the concentric sleeve (2) is sleeved on the rotating portion (12), and an abutting airbag (3) is provided on the inner wall of the concentric sleeve (2), wherein the abutting airbag (3) has a connecting surface (31) and an abutting surface (32), wherein the connecting surface (31) is used to connect to the concentric sleeve (2), and the abutting surface (32) is used to abut against the rotating portion (12).

2. A rotating shaft assembly according to claim 1, characterized in that: The abutment surface (32) is connected to an abutment sheet (4), the abutment sheet (4) being used for abutment by the rotating part (12), and the hardness of the abutment sheet (4) being greater than the hardness of the abutment airbag (3).

3. A rotating shaft assembly according to claim 2, characterized in that: The abutment sheet (4) is detachably connected to the abutment airbag (3).

4. A rotating shaft assembly according to claim 2 or 3, characterized in that: The abutting surface (32) and the abutting sheet (4) are made of magnetic material.

5. A rotating shaft assembly according to claim 2, characterized in that: A plurality of the abutment airbags (3) are provided, and the plurality of the abutment airbags (3) are arranged at intervals around the central axis of the concentric sleeve (2); a plurality of the abutment sheets (4) are provided, and the plurality of the abutment sheets (4) correspond one-to-one to the plurality of the abutment airbags (3); the abutment sheets (4) are connected to the concentric sleeve (2) by sliding along the radial direction of the concentric sleeve (2).

6. A rotating shaft assembly according to claim 5, characterized in that: The inner wall of the concentric sleeve (2) is connected to a receiving member (21), the receiving member (21) is located in the interval between adjacent abutting airbags (3), and the receiving member (21) is provided with a sliding groove (211) along the radial direction of the concentric sleeve (2); the surface of the abutting sheet (4) facing the abutting airbag (3) is connected to a sliding member (41), and the sliding groove (211) is used for the sliding member (41) to be inserted.

7. A rotating shaft assembly according to claim 6, characterized in that: The accommodating member (21) is extended along the length direction of the concentric sleeve (2), and one end of the sliding groove (211) passes through the end surface of the accommodating member (21); the end of the accommodating member (21) is connected to a blocking member (212), and the blocking member (212) is used to block the end of the sliding groove (211).

8. A rotating shaft assembly according to claim 7, characterized in that: The contact piece (4) is elastic.

Images