Magnetic coupling and power mechanism with same
阅读说明：本技术 磁联轴器及具有该磁联轴器的动力机构 (Magnetic coupling and power mechanism with same ) 是由 于卿源 陈新春 张晨辉 雒建斌 于 2020-04-24 设计创作，主要内容包括：本发明提供一种磁联轴器及具有该磁联轴器的动力机构。磁联轴器包括：第一部、第二部、第一磁性件以及第二磁性件。第一磁性件与第一部固定连接。第二磁性件与第二部固定连接。上述的磁联轴器,用于连接动力件与被传动件,在摩擦试验过程中需要进行降温时,通过旋转第一部,使第一磁性件相对于第二磁性件转动,以减小第一磁性件在第二磁性件上的投影面积和第二磁性件在第一磁性件上的投影面积,从而使得第一磁性件与第二磁性件之间的吸引力减小,第一部与第二部之间的贴合力不足以支撑被传动件,从而使得第二部与第一部可以快速断开连接,切断了第一部与第二部之间的热传导,进而降低了系统漏热,提升了低温实验的制冷效能。(The invention provides a magnetic coupling and a power mechanism with the same. The magnetic coupling includes: the first part, the second part, first magnetic part and second magnetic part. The first magnetic part is fixedly connected with the first part. The second magnetic part is fixedly connected with the second part. The magnetic coupling is used for connecting a power part and a driven part, when the temperature needs to be reduced in the friction test process, the first magnetic part rotates relative to the second magnetic part by rotating the first part, so that the projection area of the first magnetic part on the second magnetic part and the projection area of the second magnetic part on the first magnetic part are reduced, the attraction force between the first magnetic part and the second magnetic part is reduced, the attaching force between the first part and the second part is not enough to support the driven part, the second part and the first part can be quickly disconnected, the heat conduction between the first part and the second part is cut off, the heat leakage of a system is reduced, and the refrigeration efficiency of a low-temperature test is improved.)
1. A magnetic coupling, comprising:
a first part;
a second section;
the first magnetic part is fixedly connected with the first part;
the second magnetic part is fixedly connected with the second part, the second magnetic part is opposite to the first magnetic part, and the first part is attached to the second part by the magnetic force between the second magnetic part and the first magnetic part; when the first part and the second part rotate relatively, the projection area of the second magnetic part on the first magnetic part is changed.
2. The magnetic coupling of claim 1, comprising: the first part is provided with a first groove, and the first magnetic piece is positioned in the first groove; the second part is provided with a second groove, and the second magnetic piece is positioned in the second groove.
3. The magnetic coupling of claim 2,
the second part is provided with a third groove, and the second groove is arranged on the bottom wall of the third groove;
the first part is inserted into the third groove and matched with the third groove, and the magnetic force between the second magnetic part and the first magnetic part enables the first part to be attached to the bottom wall of the third groove.
4. The magnetic coupling of claim 2,
the first part is provided with a fourth groove, and the first groove is arranged on the bottom wall of the fourth groove;
the second part is inserted into the fourth groove and matched with the fourth groove, and the second part is attached to the bottom wall of the fourth groove through magnetic force between the second magnetic piece and the first magnetic piece.
5. A magnetic coupling according to claim 1, wherein the second magnetic member has a position corresponding to the first magnetic member, in which a surface of the first magnetic member facing the second magnetic member is entirely projected on the second magnetic member, and a surface of the second magnetic member facing the first magnetic member is entirely projected on the first magnetic member.
6. A magnetic coupling according to claim 5, wherein the surface of the first magnetic member facing the second magnetic member is the same shape, the same size and parallel to the surface of the second magnetic member facing the first magnetic member.
7. A magnetic coupling according to claim 6, wherein the surface of the first magnetic member facing the second magnetic member and the surface of the second magnetic member facing the first magnetic member are both oblong.
8. A magnetic coupling according to claim 1, wherein the distance between the second magnetic member and the first magnetic member is adjustable.
9. A magnetic coupling according to claim 1 or 8, further comprising a first threaded connection, said first magnetic member being connected to said first portion by said first threaded connection; and/or, the magnetic coupling further comprises a second threaded connector, and the second magnetic part is connected with the second part through the second threaded connector.
10. A power mechanism, comprising a magnetic coupling according to any one of claims 1 to 9, a connecting part and a motor, wherein the connecting part is connected with the motor; the first part and the connecting part have a first connecting state and a second connecting state; in the first connection state, the first part is fixedly connected with the connection part; in the second connection state, the first portion is rotatably connected with the connection portion.
11. The power mechanism as claimed in claim 10, further comprising a third screw connection member, wherein the connection portion is sleeved on the magnetic coupling, and in the first connection state, the first portion and the connection portion are fixedly connected through the third screw connection member; when the third threaded connector is loosened, the first portion and the connecting portion are switched to the second connection state.
Technical Field
The invention relates to the technical field of friction test equipment, in particular to a magnetic coupling and a power mechanism with the same.
Background
The basic goals of tribology are to explore the scientific mechanism of origin of friction, develop methods to control frictional wear, and apply them to industrial production. In the field of tribology, a friction tester is a common device for performing friction tests, and is divided into a bench test machine and a sample test machine. The object tested by the bench test machine is a product at a component level, such as a bearing, a piston and the like, the component can be installed to simulate the actual operation condition (including speed, load, temperature, environmental atmosphere and the like), and the bench test machine has the function of measuring the friction mechanical index (such as the resistance torque of the bearing and the like). The object tested by the sample testing machine is a sample with simple geometric structure, including a plane, a cylindrical surface, a spherical surface and the like, and the testing method is generally that after an upper sample and a lower sample are loaded, a load in a given vertical direction is applied between the upper sample and the lower sample, and meanwhile, horizontal relative motion is carried out, and the horizontal friction force between the samples is measured. The modes of motion include rolling friction and sliding friction, wherein sliding friction includes reciprocating sliding, circumferential sliding, and the like. Besides basic functions of accurate loading, motion control and friction force measurement, a part of high-end testing machines also have the functions of temperature control, environment control (control of different vacuum degrees, relative humidity and gas components), voltage application and friction site optical/infrared detection.
The common objective of the friction testing machine is that under a certain environment (temperature, atmosphere and the like), a friction contact state is created by adjustable load and speed working condition parameters, and the actual operation of a friction pair in engineering is simulated; secondly, the accurate measurement of mechanical parameters such as friction force, friction torque and the like is ensured in the friction running process, and other information is measured as much as possible. The friction tester is indispensable equipment for evaluating the friction and wear characteristics of materials and modifying and optimizing the research process in the tribology research process. The friction tester under the conventional atmospheric environment is very various. However, the conventional friction test equipment has the problem of heat leakage in the process of cooling in a low-temperature test environment.
Disclosure of Invention
Therefore, it is necessary to provide a magnetic coupling and a power mechanism having the same, which can solve the problem of heat leakage in the process of cooling the conventional friction test equipment in a low-temperature test environment.
An embodiment of the present application provides a magnetic coupling, include:
a first part;
a second section;
the first magnetic part is fixedly connected with the first part;
the second magnetic part is fixedly connected with the second part, the second magnetic part is opposite to the first magnetic part, and the first part is attached to the second part by the magnetic force between the second magnetic part and the first magnetic part; when the first part and the second part rotate relatively, the projection area of the second magnetic part on the first magnetic part is changed.
The magnetic coupling is used for connecting the power part and the driven part, and when the temperature needs to be reduced in the friction test process, the first magnetic part rotates relative to the second magnetic part by rotating the first part so as to reduce the projection area of the first magnetic part on the second magnetic part and the projection area of the second magnetic part on the first magnetic part, so that the attraction force between the first magnetic part and the second magnetic part is reduced, and the adhesion force between the first part and the second part is reduced. Because the laminating power between first portion and the second portion reduces, the weight of driven spare is great in the friction test, and the laminating power between first portion and the second portion is not enough to support driven spare to make second portion and first portion can quick disconnection, cut off the heat-conduction between first portion and the second portion, and then reduced the system and leaked heat, promoted low temperature experiment's refrigeration efficiency.
In one embodiment, the magnetic coupling comprises: the first part is provided with a first groove, and the first magnetic piece is positioned in the first groove; the second part is provided with a second groove, and the second magnetic piece is positioned in the second groove.
In one embodiment, the second portion is provided with a third groove, and the second groove is arranged on the bottom wall of the third groove;
the first part is inserted into the third groove and matched with the third groove, and the magnetic force between the second magnetic part and the first magnetic part enables the first part to be attached to the bottom wall of the third groove.
In one embodiment, the first portion is provided with a fourth groove, and the first groove is arranged on the bottom wall of the fourth groove;
the second part is inserted into the fourth groove and matched with the fourth groove, and the second part is attached to the bottom wall of the fourth groove through magnetic force between the second magnetic piece and the first magnetic piece.
In one embodiment, the second magnetic member has a position corresponding to the first magnetic member, and in the corresponding position, a surface of the first magnetic member facing the second magnetic member is completely projected on the second magnetic member, and a surface of the second magnetic member facing the first magnetic member is completely projected on the first magnetic member.
In one embodiment, the surface of the first magnetic member facing the second magnetic member and the surface of the second magnetic member facing the first magnetic member have the same shape, the same size and are parallel to each other.
In an embodiment, a surface of the first magnetic member facing the second magnetic member and a surface of the second magnetic member facing the first magnetic member are both rectangular.
In one embodiment, the distance between the second magnetic member and the first magnetic member is adjustable.
In an embodiment, the magnetic coupling further includes a first threaded connector, and the first magnetic member is connected to the first portion through the first threaded connector; and/or, the magnetic coupling further comprises a second threaded connector, and the second magnetic part is connected with the second part through the second threaded connector.
Another embodiment of the present application further provides a power mechanism, where the power mechanism includes the magnetic coupling, the connecting portion, and the motor as described in any of the above embodiments, and the connecting portion is connected to the motor; the first part and the connecting part have a first connecting state and a second connecting state; in the first connection state, the first part is fixedly connected with the connection part; in the second connection state, the first portion is rotatably connected with the connection portion.
In an embodiment, the power mechanism further includes a third threaded connection member, the connection portion is sleeved on the magnetic coupling, and in the first connection state, the first portion and the connection portion are fixedly connected through the third threaded connection member; when the third threaded connector is loosened, the first portion and the connecting portion are switched to the second connection state.
Drawings
FIG. 1 is a front view of a magnetic coupling of an embodiment;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of the first portion of FIG. 2;
FIG. 4 is a schematic view of the second portion of FIG. 2;
FIG. 5 is a left side view of the magnetic coupling of FIG. 1;
fig. 6 is a sectional view B-B of fig. 5.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 1 and 2, a magnetic coupling 100 is provided according to an embodiment of the present invention. The magnetic coupling 100 includes: a
Specifically, the magnetic coupling 100 is used to connect a power member and a driven member. In the friction test, the
The
Since the first
When the first
When the temperature needs to be reduced in the friction test process, the first
When the weight of the driven member is too large, in order to prevent the driving member from being damaged due to too large tensile force, the projection area of the first
Referring to fig. 3 and 4 in combination with fig. 2, in an embodiment, the
Specifically, the
In one embodiment, the
Specifically, the
In this embodiment, the second surface is a bottom wall of the
In other embodiments, a fourth groove (not shown) may be formed in the
In one embodiment, the second
Specifically, the surface of the first
For example, the surface of the first
In one embodiment, the distance between the second
Referring to fig. 5 and 6, in one embodiment, the magnetic coupling 100 further includes a first threaded
Referring to fig. 5 and 6, in one embodiment, the magnetic coupling 100 further includes a second threaded
An embodiment of the present application also provides a power mechanism (not shown). The power mechanism comprises the magnetic coupling 100, the connecting part and the motor. The connection portions are connected to the motor and the
In particular, the connection may be an electromechanical connection block. The power mechanism further comprises a magnetic coupling rod and a third threaded connecting piece. The connecting part is sleeved on the magnetic coupling rod. The magnetic coupling rod is fixedly connected to the
When the magnetic coupling rod is rotated to rotate the
When the weight of the driven member is too large, in order to prevent the driving member from being damaged due to too large pulling force, the magnetic coupling rod can be rotated to rotate the
It is understood that in other embodiments, the power mechanism may not be provided with a magnetic coupling rod, the connecting portion is directly sleeved on the
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
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