Structural type switchable hinge four-bar mechanism science popularization exhibition and teaching device

Abstract

The utility model belongs to the technical field of teaching aids, and particularly discloses a hinge four-bar mechanism science popularization exhibition teaching device with a switchable structural form, which comprises a support platform and a hinge four-bar mechanism mounted on the support platform. The hinge four-bar mechanism comprises a first component, a second component, a third component and a fourth component which are connected end to end, and the lengths of the first component, the second component, the third component and the fourth component are different. The utility model provides a hinge four-bar mechanism science popularization exhibition teaching device with a switchable structural form, and different components of the same hinge four-bar mechanism are respectively converted into a rack, so that the conversion of a crank rocker mechanism, a double-crank mechanism and a double-rocker mechanism can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of teaching auxiliary tools, and particularly relates to a science popularization and teaching device with a hinged four-bar mechanism whose structural type can be switched. Background Art

[0002] Four-bar linkages are widely used in planar linkages. A four-bar linkage in which all the moving pairs are rotating pairs is called a hinged four-bar linkage. It is the basic form of a planar four-bar linkage, and other four-bar linkages can be considered to have evolved on its basis. In a hinged four-bar linkage, the fixed component is called a frame, the component directly hinged to the frame is called a connecting rod, the component not directly connected to the frame is called a connecting rod, the component that can make a full rotation is called a crank, and the component that can only swing back and forth within a certain angle range is called a rocker; in a hinged four-bar linkage, according to whether the connecting rod can make a full rotation, it can be divided into three basic forms, namely a crank rocker mechanism, a double crank mechanism, and a double rocker mechanism.

[0003] In the existing science popularization and education device with hinged four-bar mechanism, the fixed component is the frame, that is, the fixed end. The connecting rod and the connecting rod are arranged with multiple sets of hinge shaft connection circular holes or elliptical holes along the length direction. By selecting different holes on the components, the C and D hinge points with varying distances on the mechanism are formed. By changing the length of the connecting rod and the connecting rod, the required crank rocker mechanism, double crank mechanism or double rocker mechanism is formed. After driving the corresponding components, the real-time movement of the components in space can be observed. In the existing science popularization and education device with hinged four-bar mechanism, one of the fixed components is the frame. It is difficult to realize the visual geometric expression of the motion characteristics of all possible combination mechanisms in the same set of exhibition and education devices, and thus it is impossible to obtain the corresponding motion trajectory changes, and the exhibition and education effect is not good. Utility Model Content

[0004] The purpose of the utility model is to overcome the above problems existing in the prior art and to provide a science popularization and teaching device of a hinged four-bar mechanism with switchable structural types, which can convert different components of the same hinged four-bar mechanism into a frame, thereby realizing the conversion of a crank rocker mechanism, a double crank mechanism and a double rocker mechanism.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A science popularization and teaching device with a hinged four-bar mechanism having a switchable structure type, comprising a support platform and a hinged four-bar mechanism installed on the support platform;

[0007] The hinged four-bar mechanism comprises a first component, a second component, a third component and a fourth component connected end to end, and the first component, the second component, the third component and the fourth component have different lengths;

[0008] The first component, the second component, the third component and the fourth component are each provided with two threaded grooves on one side close to the supporting platform, and a height compensation block is arranged in the threaded groove. The other side of the first component, the second component, the third component and the fourth component are each integrally formed with an operating handle, and two extension handles are rotatably installed on the outer circumferential surface of the operating handle.

[0009] Furthermore, a first through hole is formed at the left and right ends of the front side surface of the first component, and a first connecting member is rotatably installed in the first through hole;

[0010] A second through hole is formed at both the left and right ends of the front side surface of the third member, and a second connecting member is rotatably mounted in the second through hole;

[0011] The first connecting member and the second connecting member have the same structure;

[0012] One end of the second member and the fourth member is connected to the first member through a first connecting member, and the other end of the second member and the fourth member is connected to the third member through a second connecting member;

[0013] The first member is located at the rear ends of the second member and the fourth member, and the third member is located at the front ends of the second member and the fourth member;

[0014] The first component, the second component, the third component and the fourth component are integrally formed with two mounting blocks on their exteriors, the mounting blocks are provided with pin holes, and the pin holes are provided with pin shafts. The first component, the second component, the third component and the fourth component can be fixed on the support platform by the pin shafts.

[0015] Furthermore, the first connecting member includes a connecting pipe and a sealing head sealed at both ends of the connecting pipe, and a blocking member is integrally formed at the other end of the sealing head, and the diameter of the blocking member is larger than the outer diameter of the connecting pipe;

[0016] An adjusting gasket is sleeved on the outside of the connecting pipe.

[0017] Furthermore, the material of the adjusting gasket is rubber;

[0018] The inner surface of the adjusting gasket is tightly fitted with the outer surface of the connecting pipe.

[0019] Furthermore, a plurality of gaskets are sleeved on the outside of the pin shaft.

[0020] Furthermore, the other end of the height compensation block is in close contact with the supporting platform.

[0021] Further, the height compensation block comprises a screw rod and a ball set which are fixedly connected, a universal ball is installed at the other end of the ball set, and the other end of the screw rod is threadedly connected in the thread groove;

[0022] A spring is sleeved on the outside of the screw rod, one end of the spring is connected to the ball sleeve, and the spring is connected to the outside of the thread groove.

[0023] Furthermore, an extension bar is fixedly mounted on the lower end of the outer circumferential surface of the operating handle, a U-shaped clamp is fixedly mounted on the other end of the extension bar, and the other end of the extension handle is clamped in the open end of the U-shaped clamp.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] 1. The utility model provides a science popularization and teaching device of a hinged four-bar mechanism with switchable structural types, which can transform different components of the same hinged four-bar mechanism into frames, thereby realizing the transformation of a crank rocker mechanism, a double crank mechanism and a double rocker mechanism, and has a good teaching effect.

[0026] 2. The utility model is used to connect two adjacent components by setting the first connecting member and the second connecting member, and is used to adjust the distance between the two adjacent components by setting the adjusting gasket to prevent the four components from interfering with each other during movement.

[0027] 3. The utility model is used to make the fixed component close to the supporting platform during installation through the provision of a height compensation block. The height of the height compensation block is adjustable, and the provision of an adjusting gasket can prevent the height compensation block from interfering with the movement of the component.

[0028] 4. The operating handle and the extension handle are provided to move the corresponding components to enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0030] Figure 1 It is a structural schematic diagram of the utility model;

[0031] Figure 2 It is a structural schematic diagram of the hinge four-bar mechanism of the utility model;

[0032] Figure 3 It is a structural schematic diagram of the first component of the utility model;

[0033] Figure 4It is a structural schematic diagram of the third component of the utility model;

[0034] Figure 5 It is a structural schematic diagram of the first connecting member of the utility model;

[0035] Figure 6 It is a structural rear view of the first component of the utility model;

[0036] Figure 7 It is a structural schematic diagram of the height compensation block of the utility model;

[0037] Figure 8 It is a structural schematic diagram of an operating handle of the utility model.

[0038] Among them, the figure markings are: 6, support platform; 1, hinged four-bar mechanism; 10, first component; 20, second component; 30, third component; 40, fourth component; 101, first through hole; 102, first connecting member; 301, second through hole; 302, second connecting member; 103, connecting pipe; 104, head; 105, blocking member; 106, adjusting gasket; 2, threaded groove; 12, height compensation block; 13, operating handle; 14, extension handle; 121, screw; 122, ball kit; 123, universal ball roller; 124, spring; 131, extension strip; 132, U-shaped block; 50, mounting block; 501, pin hole. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] like Figure 1 As shown, a science popularization and teaching device of a hinged four-bar mechanism with visualized motion trajectory comprises a support platform 6 and a hinged four-bar mechanism 1 installed on the support platform 6;

[0042] The hinged four-bar mechanism 1 comprises a first member 10, a second member 20, a third member 30 and a fourth member 40 connected end to end, and the first member 10, the second member 20, the third member 30 and the fourth member 40 have different lengths;

[0043] Among them, the motion trajectory curves of the second component 20 and the fourth component 40 are also drawn on the support platform 6. When the first component 10 is used as the fixed end, it can be used to intuitively display the motion trajectories of the second component 20 and the fourth component 40, which can facilitate visitors to judge whether the motion trajectory curves of the second component 20 and the fourth component 40 are correct.

[0044] like Figures 2 to 5 As shown, the left and right ends of the front side of the first component 10 are both provided with first through holes 101, and a first connecting member 102 is rotatably installed in the first through hole 101;

[0045] The left and right ends of the front side surface of the third member 30 are both provided with second through holes 301, and a second connecting member 302 is rotatably installed in the second through hole 301;

[0046] The first connecting member 102 and the second connecting member 302 have the same structure;

[0047] One end of the second member 20 and the fourth member 40 is connected to the first member 10 through the first connecting member 102, and the other end of the second member 20 and the fourth member 40 is connected to the third member 30 through the second connecting member 302;

[0048] The first member 10 is located at the rear end of the second member 20 and the fourth member 40, and the third member 30 is located at the front end of the second member 20 and the fourth member 40;

[0049] The first connecting member 102 includes a connecting pipe 103 and a sealing head 104 sealed at both ends of the connecting pipe 103. The other end of the sealing head 104 is integrally formed with a blocking member 105. The diameter of the blocking member 105 is larger than the outer diameter of the connecting pipe 103. With this arrangement, the first connecting member 102 and the second connecting member 302 can be disassembled and assembled, and the four components can be disassembled and assembled.

[0050] The connecting pipe 103 is provided with an adjusting gasket 106 on the outside, and the adjusting gasket 106 is made of rubber;

[0051] The inner surface of the adjusting gasket 106 is closely fitted with the outer surface of the connecting pipe 103;

[0052] Among them, an adjusting spacer 106 is used to increase the distance between the two connected components to prevent interference during the movement;

[0053] Through this arrangement, in practical applications, the hinged four-bar mechanism composed of four components can be converted between a crank-rocker mechanism, a double crank mechanism and a double rocker mechanism.

[0054] like Figures 6 to 8 As shown, the first component 10, the second component 20, the third component 30 and the fourth component 40 are each provided with two thread grooves 2 on one side close to the support platform 6, and a height compensation block 12 is arranged in the thread groove 2. The other side of the first component 10, the second component 20, the third component 30 and the fourth component 40 are each integrally formed with an operating handle 13, and two extension handles 14 are rotatably mounted on the outer circumferential surface of the operating handle 13;

[0055] The other end of the height compensation block 12 is in close contact with the support platform 6;

[0056] The height compensation block 12 comprises a screw rod 121 and a ball set 122 which are fixedly connected. A universal ball 123 is installed at the other end of the ball set 122. The other end of the screw rod 121 is threadedly connected in the thread groove 2.

[0057] A spring 124 is sleeved on the outside of the screw rod 121, one end of the spring 124 is connected to the ball sleeve 122, and the spring 124 is connected to the outside of the threaded groove 2; through this arrangement, the height of the height compensation block 12 can be adjusted, that is, by screwing the screw rod 121 into the threaded groove 2, the length of the screw rod 121 extending out of the threaded groove 2 can be adjusted, thereby adjusting the height of the height compensation block 12;

[0058] An extension bar 131 is fixedly installed on the lower end of the outer circumferential surface of the operating handle 13, and a U-shaped block 132 is fixedly installed on the other end of the extension bar 131. The other end of the extension handle 14 is clamped in the open end of the U-shaped block 132; through this arrangement, when not in use, the extension handle 14 can be stored, that is, the extension handle 14 is clamped into the open end of the U-shaped block 132, and when in use, the extension handle 14 can be taken out from the open end of the U-shaped block 132.

[0059] The first component 10, the second component 20, the third component 30 and the fourth component 40 are all integrally formed with two mounting blocks 50 on the outside, and the mounting blocks 50 are provided with pin holes 501, and pin shafts are provided in the pin holes 501. The first component 10, the second component 20, the third component 30 and the fourth component 40 can be fixed on the support platform 6 by the pin shafts;

[0060] A plurality of washers are arranged outside the pin shaft.

[0061] The utility model provides a science popularization and teaching device of a hinged four-bar mechanism with switchable structural types, which can transform different components of the same hinged four-bar mechanism into frames, thereby realizing the transformation of a crank rocker mechanism, a double crank mechanism and a double rocker mechanism, and has a good teaching effect.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0063] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A science popularization and teaching device with a hinged four-bar mechanism with switchable structural types, characterized in that: It comprises a support platform (6) and a hinged four-bar mechanism (1) installed on the support platform (6); The hinged four-bar mechanism (1) comprises a first component (10), a second component (20), a third component (30) and a fourth component (40) which are connected end to end, and the first component (10), the second component (20), the third component (30) and the fourth component (40) have different lengths; Two threaded grooves (2) are provided on one side of the first component (10), the second component (20), the third component (30) and the fourth component (40) close to the support platform (6), and a height compensation block (12) is arranged in the threaded groove (2); and an operating handle (13) is integrally formed on the other side of the first component (10), the second component (20), the third component (30) and the fourth component (40), and two extension handles (14) are rotatably mounted on the outer circumferential surface of the operating handle (13).

2. A science popularization and teaching device with a hinged four-bar mechanism with switchable structural type according to claim 1, characterized in that: A first through hole (101) is provided at the left end and the right end of the front side surface of the first component (10), and a first connecting member (102) is rotatably installed in the first through hole (101); The left and right ends of the front side surface of the third component (30) are both provided with second through holes (301), and a second connecting member (302) is rotatably installed in the second through hole (301); The first connecting member (102) and the second connecting member (302) have the same structure; One end of the second component (20) and the fourth component (40) is connected to the first component (10) via a first connecting member (102), and the other end of the second component (20) and the fourth component (40) is connected to the third component (30) via a second connecting member (302); The first component (10) is located at the rear ends of the second component (20) and the fourth component (40), and the third component (30) is located at the front ends of the second component (20) and the fourth component (40); The first component (10), the second component (20), the third component (30) and the fourth component (40) are integrally formed with two mounting blocks (50) on their exteriors, the mounting blocks (50) being provided with pin holes (501), the pin holes (501) being provided with pin shafts, and the first component (10), the second component (20), the third component (30) and the fourth component (40) can be fixed on the support platform (6) by means of the pin shafts.

3. The science popularization and teaching device of a hinged four-bar mechanism with switchable structural type according to claim 2, characterized in that: The first connecting member (102) comprises a connecting pipe (103) and a sealing head (104) sealed at both ends of the connecting pipe (103); the other end of the sealing head (104) is integrally provided with a blocking member (105); the diameter of the blocking member (105) is greater than the outer diameter of the connecting pipe (103); An adjusting gasket (106) is sleeved on the outside of the connecting pipe (103).

4. The science popularization and teaching device of a hinged four-bar mechanism with switchable structural type according to claim 3, characterized in that: The material of the adjusting gasket (106) is rubber; The inner surface of the adjusting gasket (106) is tightly fitted to the outer surface of the connecting pipe (103).

5. The science popularization and teaching device of a hinged four-bar mechanism with switchable structural type according to claim 2, characterized in that: A plurality of gaskets are sleeved on the outside of the pin shaft.

6. The science popularization and teaching device of a hinged four-bar mechanism with switchable structural type according to claim 1, characterized in that: The other end of the height compensation block (12) is in close contact with the supporting platform (6).

7. The science popularization and teaching device of a hinged four-bar mechanism with switchable structural type according to claim 1, characterized in that: The height compensation block (12) comprises a screw rod (121) and a ball set (122) which are fixedly connected, a universal ball (123) being installed at the other end of the ball set (122), and the other end of the screw rod (121) being threadedly connected in a thread groove (2); A spring (124) is sleeved on the outside of the screw rod (121), one end of the spring (124) is connected to the ball sleeve (122), and the spring (124) is connected to the outside of the threaded groove (2).

8. The science popularization and teaching device of a hinged four-bar mechanism with switchable structural type according to claim 1, characterized in that: An extension bar (131) is fixedly mounted on the lower end of the outer circumferential surface of the operating handle (13), a U-shaped clamping block (132) is fixedly mounted on the other end of the extension bar (131), and the other end of the extension handle (14) is clamped in the open end of the U-shaped clamping block (132).

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