Connecting structure and electric cylinder

Abstract

The utility model provides a connecting structure and an electric cylinder. The connecting structure comprises a first connecting piece, a connecting sleeve and a second connecting piece. The connecting sleeve is of a hollow structure; the first connecting piece is provided with a first limiting polished rod part which can be inserted into the connecting sleeve, and the second connecting piece is provided with a second limiting polished rod part which can be inserted into the connecting sleeve; the first limiting polished rod part is inserted into one end of the connecting sleeve; the second limiting polished rod part is inserted into the other end of the connecting sleeve; the first connecting piece is in transmission connection with the second connecting piece through the connecting sleeve. The first limiting polished rod part is inserted into one end of the connecting sleeve, and the second limiting polished rod part is inserted into the other end of the connecting sleeve, so that the first connecting piece, the connecting sleeve and the second connecting piece in the connecting structure are coaxial; the situation that an included angle is formed between the driving shaft and the coupling sleeve due to the fact that the axis of the driving shaft and the axis of the coupling sleeve do not coincide in the connecting structure is avoided, and the radial stability of connecting parts is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical structures, and in particular to a connection structure and an electric cylinder. Background Art

[0002] At present, the driving shaft and the coupling sleeve in a connection structure (such as a coupling) are connected by threads. After the driving shaft and the coupling sleeve of the connection structure have been in operation for a period of time, errors may occur during the processing of the threads. Such errors cause the relative position of the driving shaft and the coupling sleeve to change after the connection structure has been in operation for a period of time, resulting in the axes of the driving shaft and the coupling sleeve no longer coinciding and forming an angle between the driving shaft and the coupling sleeve. This causes the connection structure to generate vibration and noise during operation, and also causes unnecessary wear of the driving shaft and the coupling sleeve, thereby reducing the service life of the connection structure. Utility Model Content

[0003] To solve the above problems, the embodiment of the present application aims to provide a connection structure and an electric cylinder.

[0004] In a first aspect, an embodiment of the present application provides a connection structure, comprising: a first connection member, a connection sleeve, and a second connection member;

[0005] The connecting sleeve is a hollow structure;

[0006] The first connecting member is provided with a first position-limiting light rod portion that can be inserted into the connecting sleeve, and the second connecting member is provided with a second position-limiting light rod portion that can be inserted into the connecting sleeve;

[0007] The first position-limiting light rod is plugged into one end of the connecting sleeve; the second position-limiting light rod is plugged into the other end of the connecting sleeve;

[0008] The first connecting member is transmission-connected to the second connecting member through the connecting sleeve.

[0009] In a second aspect, an embodiment of the present application further provides an electric cylinder, comprising: the connection structure described in the first aspect above.

[0010] In the solutions provided in the first aspect to the second aspect of the embodiments of the present application, a first limiting light rod portion that can be inserted into the connecting sleeve is provided on the first connecting piece of the connecting structure, and a second limiting light rod portion that can be inserted into the connecting sleeve is provided on the second connecting piece of the connecting structure. The first limiting light rod portion is inserted into one end of the connecting sleeve; the second limiting light rod portion is inserted into the other end of the connecting sleeve. This is different from the situation in the related art where the relative position between the driving shaft and the coupling sleeve of the connecting structure changes, causing the axes of the driving shaft and the coupling sleeve to no longer coincide, thereby forming an angle between the driving shaft and the coupling sleeve. In comparison, by inserting the first limiting light rod portion into one end of the connecting sleeve and the second limiting light rod portion into the other end of the connecting sleeve, the first connecting member, the connecting sleeve and the second connecting member inside the connecting structure are made coaxial, thereby avoiding the situation in which the axes of the driving shaft and the coupling sleeve in the connecting structure no longer coincide with each other and an angle is formed between the driving shaft and the coupling sleeve, ensuring the radial stability of the connecting parts, avoiding as much as possible the occurrence of vibration and noise caused by the misalignment of the connecting member and the sleeve inside the connecting structure during operation, reducing the wear of the connecting structure during operation, and improving the service life of the connecting structure.

[0011] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0013] Figure 1 A cross-sectional schematic diagram of a connection structure provided in an embodiment of the present application is shown;

[0014] Figure 2 An exploded schematic diagram of a connection structure provided by an embodiment of the present application is shown;

[0015] Figure 3 A cross-sectional view of a connecting sleeve provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0016] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0018] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0019] At present, the driving shaft and the coupling sleeve in a connection structure (such as a coupling) are connected by threads. After the driving shaft and the coupling sleeve of the connection structure have been in operation for a period of time, errors may occur during the processing of the threads. Such errors cause the relative position of the driving shaft and the coupling sleeve to change after the connection structure has been in operation for a period of time, resulting in the axes of the driving shaft and the coupling sleeve no longer coinciding and forming an angle between the driving shaft and the coupling sleeve. This causes the connection structure to generate vibration and noise during operation, and also causes unnecessary wear of the driving shaft and the coupling sleeve, thereby reducing the service life of the connection structure.

[0020] When installing couplings in electromechanical equipment (such as electric cylinders), shrink-fitting is typically performed. This involves heating the coupling to a specified temperature (typically around 250°C). After heating to the specified temperature, the coupling's expansion is measured to determine its expanded inner diameter. The coupling is then shrink-fitted in the electric cylinder, completing the installation of the coupling in the electromechanical equipment.

[0021] The shrink-fitting method of the coupling is not only time-consuming, but also because the shrink-fitting work is performed at high temperature, if the preparation work is not careful and the operators are not coordinated, it may bring serious adverse consequences to the shrink-fitting work of the coupling.

[0022] Based on this, the following embodiments of the present application propose a connection structure and an electric cylinder, by providing a first limiting light rod portion that can be inserted into the connecting sleeve on the first connecting piece of the connection structure, and providing a second limiting light rod portion that can be inserted into the connecting sleeve on the second connecting piece of the connection structure, the first limiting light rod portion is inserted into one end of the connecting sleeve; the second limiting light rod portion is inserted into the other end of the connecting sleeve. By inserting the first limiting light rod portion into one end of the connecting sleeve and the second limiting light rod portion into the other end of the connecting sleeve, the first connecting piece, the connecting sleeve and the second connecting piece inside the connection structure are coaxial, avoiding the situation where the axes of the driving shaft and the coupling sleeve in the connection structure no longer coincide and the driving shaft and the coupling sleeve form an angle, ensuring the radial stability of the connection parts, avoiding the occurrence of vibration and noise caused by the non-coaxiality of the connecting piece and the sleeve inside the connection structure during operation as much as possible, reducing the wear of the connection structure during operation, and improving the service life of the connection structure.

[0023] Moreover, there is no need to use the hot-fit method to install the coupling on the electromechanical equipment, which greatly shortens the installation time of the coupling. The operator does not need to make a lot of preparation and coordination to complete the installation of the coupling on the electromechanical equipment. The operation is simple and convenient.

[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Example 1

[0026] See also Figure 1 A cross-sectional schematic diagram of a connection structure shown in FIG. Figure 2 An exploded schematic diagram of a connection structure shown, and Figure 3 The cross-sectional view of the connecting sleeve shown in the embodiment proposes a connecting structure, including: a first connecting member 1, a connecting sleeve 2 and a second connecting member 3; the connecting sleeve 2 is a hollow structure; the first connecting member 1 is provided with a first limiting light rod portion 102 that can be inserted into the connecting sleeve 2, and the second connecting member 3 is provided with a second limiting light rod portion 302 that can be inserted into the connecting sleeve 2; the first limiting light rod portion 102 is inserted into one end of the connecting sleeve 2; the second limiting light rod portion 302 is inserted into the other end of the connecting sleeve 2; the first connecting member 1 is transmission-connected to the second connecting member 3 through the connecting sleeve 2.

[0027] Specifically, the connecting sleeve 2 is a structure with an intermediate connection, and a first limiting hole 202, a first internal threaded connection part 201, a second internal threaded connection part 203 and a second limiting hole 204 are sequentially arranged inside the connecting sleeve 2; the first limiting hole 202 and the second limiting hole 204 are respectively connected to the two ends of the connecting sleeve 2; the outer diameter of the first limiting light rod part 102 is the same as the inner diameter of the first limiting hole 202; the outer diameter of the second limiting light rod part 302 is the same as the inner diameter of the second limiting hole 204; the first limiting light rod part 102 is inserted into the first limiting hole 202; the second limiting light rod part 302 is inserted into the second limiting hole 204.

[0028] Specifically, the first connecting member 1 is provided with a first position-limiting light rod portion 102, and one end thereof is provided with a first threaded connection end 101, a first position-limiting light rod portion 102 and a first position-limiting ring 103 in sequence from the inside to the outside; the first threaded connection end 101 is threadedly connected to the first internal threaded connection portion 201; the first position-limiting ring 103 is in contact with an end face of the connecting sleeve 2 facing the end face of the first position-limiting light rod portion 102.

[0029] Specifically, the second connecting member 3 is provided with the second limiting light rod portion 302, and one end thereof is provided with the second threaded connection end 301, the second limiting light rod portion 302 and the second limiting ring 303 from the inside to the outside; the second threaded connection end 301 is threadedly connected to the second internal threaded connection portion 203; the second limiting ring 303 is in contact with the other end face of the connecting sleeve 2 facing the end face of the second limiting light rod portion 302.

[0030] Specifically, the cross section of the first limiting ring 103 is polygonal; and a screwing portion 205 is provided at one end of the connecting sleeve 2 connected to the first connecting member 1 .

[0031] The design of the first limiting ring 103 and the screwing portion 205 facilitates the screwing connection between the first connecting member 1 and the above-mentioned connecting sleeve 2; and also facilitates the connection between the above-mentioned connecting sleeve 2 and the second connecting member 3, that is, the above-mentioned connecting sleeve 2 can be more conveniently fixed through the screwing portion 205 during the screwing process.

[0032] From the above description, it can be seen that the connection structure proposed in this embodiment adds a limiting portion (that is, the first connecting member of the connection structure is provided with a first limiting light rod portion that can be inserted into the connecting sleeve, and the second connecting member of the connection structure is provided with a second limiting light rod portion that can be inserted into the connecting sleeve). While simplifying installation, it avoids the relative position change between the connection structure components to form an angle, limits the radial loosening of the connection structure, and eliminates axial loosening.

[0033] This embodiment further provides an electric cylinder, comprising: the above-mentioned connection structure.

[0034] In a possible implementation manner, the first connecting member 1 in the connecting structure is an output shaft of a motor in the electric cylinder.

[0035] In a possible implementation manner, the second connecting member 3 in the connecting structure is a lead screw in the electric cylinder.

[0036] In summary, this embodiment proposes a connecting structure and an electric cylinder, in which a first limiting light rod portion that can be inserted into the connecting sleeve is provided on the first connecting piece of the connecting structure, and a second limiting light rod portion that can be inserted into the connecting sleeve is provided on the second connecting piece of the connecting structure, the first limiting light rod portion is inserted into one end of the connecting sleeve; the second limiting light rod portion is inserted into the other end of the connecting sleeve, compared with the situation in the related art that the relative position between the driving shaft and the coupling sleeve of the connecting structure changes, causing the axes of the driving shaft and the coupling sleeve to no longer coincide, thereby forming an angle between the driving shaft and the coupling sleeve. The first limiting light rod is inserted into one end of the connecting sleeve and the second limiting light rod is inserted into the other end of the connecting sleeve, so that the first connecting member, the connecting sleeve and the second connecting member inside the connecting structure are coaxial, thereby avoiding the situation where the axes of the driving shaft and the coupling sleeve in the connecting structure no longer coincide with each other, thereby forming an angle between the driving shaft and the coupling sleeve, ensuring the radial stability of the connecting parts, avoiding as much as possible the occurrence of vibration and noise caused by the misalignment of the connecting member and the sleeve inside the connecting structure during operation, reducing the wear of the connecting structure during operation, and improving the service life of the connecting structure.

[0037] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A connection structure, characterized in that: include: A first connecting member (1), a connecting sleeve (2), and a second connecting member (3); The connecting sleeve (2) is a hollow structure; The first connecting member (1) is provided with a first position-limiting light rod portion (102) capable of being inserted into the connecting sleeve (2), and the second connecting member (3) is provided with a second position-limiting light rod portion (302) capable of being inserted into the connecting sleeve (2); The first position-limiting light rod portion (102) is plugged into one end of the connecting sleeve (2); the second position-limiting light rod portion (302) is plugged into the other end of the connecting sleeve (2); The first connecting member (1) is transmission-connected to the second connecting member (3) via the connecting sleeve (2).

2. The connection structure according to claim 1, characterized in that: The connecting sleeve (2) is provided with a first limiting hole (202), a first internal thread connection portion (201), a second internal thread connection portion (203) and a second limiting hole (204) in sequence. The first limiting hole (202) and the second limiting hole (204) are respectively connected to two ends of the connecting sleeve (2); The outer diameter of the first limiting light rod portion (102) is the same as the inner diameter of the first limiting hole (202); The outer diameter of the second position-limiting light rod portion (302) is the same as the inner diameter of the second position-limiting hole (204); The first limiting light rod portion (102) is inserted into the first limiting hole (202); The second limiting light rod portion (302) is inserted into the second limiting hole (204).

3. The connection structure according to claim 2, characterized in that: The first connecting member (1) is provided with the first limiting light rod portion (102), and one end thereof is provided with a first threaded connection end (101), a first limiting light rod portion (102), and a first limiting ring (103) in sequence from the inside to the outside; The first threaded connection end (101) is threadedly connected to the first internal threaded connection portion (201); The end surface of the first limiting ring (103) facing the first limiting light rod portion (102) abuts against an end surface of the connecting sleeve (2).

4. The connection structure according to claim 2, characterized in that: The second connecting member (3) is provided with the second limiting light rod portion (302), and one end thereof is provided with a second threaded connection end (301), the second limiting light rod portion (302), and a second limiting ring (303) in sequence from the inside to the outside; The second threaded connection end (301) is threadedly connected to the second internal threaded connection portion (203); The end surface of the second limiting ring (303) facing the second limiting light rod portion (302) abuts against the other end surface of the connecting sleeve (2).

5. The connection structure according to claim 3, characterized in that: The cross section of the first limiting ring (103) is polygonal; One end of the connecting sleeve (2) connected to the first connecting member (1) is provided with a screwing portion (205).

6. An electric cylinder, characterized in that: include: The connection structure according to any one of claims 1 to 5.

7. The electric cylinder according to claim 6, characterized in that: The first connecting member (1) in the connecting structure is the output shaft of the motor in the electric cylinder.

8. The electric cylinder according to claim 6, characterized in that: The second connecting member (3) in the connecting structure is a lead screw in the electric cylinder.

Images