CN210722112U - Guide rod mechanism demonstration teaching aid - Google Patents
Guide rod mechanism demonstration teaching aid Download PDFInfo
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- CN210722112U CN210722112U CN201921471587.9U CN201921471587U CN210722112U CN 210722112 U CN210722112 U CN 210722112U CN 201921471587 U CN201921471587 U CN 201921471587U CN 210722112 U CN210722112 U CN 210722112U
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- connecting rod
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Abstract
The utility model discloses a guide arm mechanism demonstrates teaching aid, it includes first connecting rod (1a), second connecting rod (1b) with first connecting rod (1a) rotatable coupling, sliding sleeve (3) with first connecting rod (1a) rotatable coupling and with sliding sleeve (3) slip connect the guide arm (2) of joining in marriage, guide arm (2) include polished rod (20), first tub of portion (21) that link to each other with polished rod (20) and bias in outside second tub of portion (22) of polished rod (20) axis, first connecting rod (1a) alternative with first tub of portion (21) or second tub of portion (22) rotatable coupling. The first pipe part and the second pipe part which are connected with the polish rod are arranged, and the connecting rod is selectively connected with the first pipe part and the second pipe part, so that the teaching aid can demonstrate a centering type crank block mechanism and an offset type crank block mechanism, and has more comprehensive functions; in addition, through changing the connecting rods with different lengths or changing the positions of the fixed rod pieces, various guide rod mechanisms can be demonstrated, and the teaching of teachers is facilitated.
Description
Technical Field
The utility model relates to a teaching aid, in particular to guide arm mechanism demonstration teaching aid.
Background
During mechanical teaching, guide bar mechanism is the teaching content of ten minutes basis, for example: an offset crank slide block mechanism, an aligned crank slide block mechanism, a rotating guide rod mechanism, a swinging guide rod mechanism, a crank rocker mechanism, a moving guide rod mechanism and the like. At present, each guide rod mechanism needs to use a teaching aid to demonstrate during teaching, and teachers bring the teaching aids with various guide rod mechanisms to class, so that the teaching aids are very inconvenient.
In order to solve the above problem, a guide bar mechanism demonstration teaching aid is disclosed in the chinese utility model with patent No. 201120173364.1. Its accessible changes the length of combination bar and simulates different guide arm mechanisms, specifically can simulate: the device comprises a centering type crank sliding block mechanism, a rotating guide rod mechanism, a swinging guide rod mechanism, a crank rocker mechanism and a moving guide rod mechanism.
The disadvantage of this technique is that it does not simulate an offset slider-crank mechanism, which is taught at the same time as the offset slider-crank mechanism and the centered slider-crank mechanism, and therefore the teaching aid still has its limitations.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the above-mentioned defect among the prior art, provide a guide arm mechanism demonstration teaching aid, it can demonstrate the multiple guide arm mechanism including offset slider-crank mechanism.
In order to realize the above-mentioned utility model purpose, the utility model provides a guide arm mechanism demonstration teaching aid, it include first connecting rod, with but first connecting rod swivelling joint's second connecting rod, with but first connecting rod swivelling joint's sliding sleeve and with the sliding sleeve slides the guide arm that connects, the guide arm include the polished rod, with the first tub portion that the polished rod links to each other and be biased in the outside second tub portion of polished rod axis, first connecting rod alternative with but first tub portion or second tub portion swivelling joint.
Furthermore, the utility model discloses still provide following subsidiary technical scheme:
the guide rod mechanism demonstration teaching aid further comprises a connecting piece, and the connecting piece is connected between the first connecting rod and the first pipe portion or between the first connecting rod and the second pipe portion.
The connecting piece with first connecting rod rotatable coupling, with first pipe portion or second pipe portion fixed connection.
And a first sleeve and a second sleeve are respectively arranged at two ends of the first connecting rod and the second connecting rod.
The first sleeve is provided with a first threaded hole in threaded connection with the connecting piece; the second sleeve is provided with a through hole for the connecting piece to pass through.
And a second threaded hole communicated with the through hole is formed in the second sleeve in the radial direction, and a set screw is arranged in the second threaded hole.
The guide rod mechanism demonstration teaching aid further comprises a spacer bush arranged in the through hole, and the connecting piece is arranged in the spacer bush in a penetrating mode.
The spacer bush is in clearance fit with the through hole; the connecting piece is in transition fit with the spacer bush; the axial length of the spacer bush is slightly longer than that of the through hole.
The length of the first connecting rod is greater than that of the second connecting rod; or the length of the first connecting rod is smaller than that of the second connecting rod.
And gaskets are arranged at two ends of the spacer sleeve.
Compared with the prior art, the utility model has the advantages of: the guide rod mechanism demonstration teaching aid of the utility model can selectively connect the connecting rod with the first pipe part and the second pipe part by arranging the first pipe part and the second pipe part which are connected with the polished rod, so that the teaching aid can demonstrate an alignment crank block mechanism and an offset crank block mechanism, and the functions are more comprehensive; in addition, through changing the connecting rod of different length or changing the position of fixed connecting rod, can demonstrate multiple guide arm mechanism, made things convenient for the teacher to teach.
Drawings
Fig. 1 is a schematic structural view of the guide bar mechanism demonstration teaching aid of the present invention.
Fig. 2 is a schematic structural diagram of the middle connecting rod of the present invention.
Fig. 3 is a schematic structural view of the connection between two connecting rods according to the present invention.
Fig. 4 is an enlarged view of a portion a in fig. 3.
Fig. 5 is an enlarged view of a portion B in fig. 1.
Fig. 6 is a schematic structural view of the middle guide rod of the present invention.
Fig. 7 is a schematic structural diagram of the offset slider-crank mechanism of the present invention.
Fig. 8 is a schematic structural diagram of the center-aligned slider-crank mechanism of the present invention.
Fig. 9 is a schematic structural view of the rotation guide bar mechanism of the present invention.
Fig. 10 is a schematic structural diagram of a swing guide bar mechanism according to the present invention.
Fig. 11 is a schematic structural view of a swing guide bar mechanism of another structure according to the present invention.
Detailed Description
The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings.
As shown in fig. 1, the guide bar mechanism demonstration teaching aid according to a preferred embodiment of the present invention includes a connecting rod 1, a guide bar 2, a sliding sleeve 3, and a connecting member 4.
In the present embodiment, the number of the links 1 is two, and the links are a first link 1a and a second link 1b, respectively, and the length of the first link 1a is longer than the length of the second link 1 b.
As shown in fig. 2, the connecting rod 1 includes a generally cylindrical rod body 10 and a first sleeve 11 and a second sleeve 12 respectively disposed at two ends of the rod body 10, wherein the first sleeve 11 and the second sleeve 12 are perpendicularly connected to the two ends of the rod body 10, i.e. the axes of the first sleeve 11 and the second sleeve 12 are perpendicular to the axis of the rod body 10.
The first sleeve 11 is provided with a first threaded hole 110 and a second threaded hole 111 disposed in a radial direction of the first sleeve 11 and communicating with the first threaded hole 110. The second sleeve 12 is provided with a through hole 120.
As shown in fig. 3 and 4, the connecting member 4 is threadedly coupled to the first threaded hole 110 of the other connecting rod through the through hole 120 of one connecting rod, thereby achieving rotatable coupling between the two connecting rods. Specifically, the connector 4 includes a screw portion 4a, a head portion 4b, and a polish rod 4c connected between the screw portion 4a and the head portion 4 b. Taking the first link 1a and the second link 1b as an example, the screw portion 4a passes through the through hole 120 of the first link 1a to be coupled with the first screw hole 110 of the second link 1b, and the head portion 4b is blocked outside the through hole 120 to prevent the first link 1a from falling off. As a preferred embodiment, the connecting member 4 may be a bolt.
In order to prevent abrasion between the first link 1a and the second link 1b and between the head 4b and the second sleeve 12 due to rotation, a gasket 5 is provided between the first link 1a and the second link 1b and between the head 4b and the second sleeve 12; also, in order to prevent the connecting member 4 from wearing the through hole 120, a spacer 121 is further provided in the through hole 120, and the connecting member 4 is rotatably fitted in the spacer 121. Preferably, the spacer 5 and the spacer 121 are made of nylon.
Further, in order to prevent the connecting member 4 from rotating relative to the first threaded hole 110 during the rotation process, a set screw 112 may be threadedly engaged with the second threaded hole 111, and the set screw 112 abuts against the connecting member 4, so as to fix the connecting member 4 and prevent the connecting member 4 from rotating relative to the first connecting rod 1 a. After the head part of the connecting piece 4 is rotated, the first connecting rod 1a can be driven to rotate; the head 4b may be formed with an external hexagonal shape or may be formed with an internal hexagonal hole 4d to facilitate rotation of the head 4b by a spanner wrench or an internal hexagonal wrench.
Preferably, the spacer 121 and the connecting piece 4 are in transition fit, and loose fit (clearance fit) with the through hole 120 is adopted; the spacer 121 has an axial length slightly longer than that of the through hole 120, so that two rod members connected to each other can be flexibly rotated.
It will be appreciated that the arrangement of the connecting rods 1 with one end being a threaded hole and one end being a through hole is only a preferred embodiment, for example, it is also possible to arrange one connecting rod with both ends being through holes and the other connecting rod with both ends being threaded holes, as long as the connecting rod mechanisms can be interconnected.
As shown in fig. 5, the sliding sleeve 3 includes a first sleeve portion 30 and a second sleeve portion 31 connected to the first sleeve portion 30, and the first sleeve portion 30 and the second sleeve portion 31 are perpendicular to each other to form a T-shape. A unthreaded hole is formed in the first sleeve part 30, the first sleeve part 30 is sleeved on the guide rod 2 through the unthreaded hole, a threaded hole is formed in the second sleeve part 31, the threaded hole can penetrate through a through hole of the connecting rod 1 through the connecting piece 4 to be connected with the threaded hole of the second sleeve part 31, and similarly, a threaded hole 310 for installing a set screw is also formed in the second sleeve part 31 to fix the connecting piece 4; a shim may also be provided between the second sleeve part 31 and the connecting rod 1 to reduce friction.
As shown in fig. 6, the guide rod 2 includes a polish rod 20, a first tube part 21 connected to one end of the polish rod 20, a second tube part 22 offset from the axis of the polish rod 20, and a connecting rod 22 connected between the first tube part 21 and the second tube part 23. Preferably, the axes of the connecting rod 22 and the polished rod 20 are perpendicular to each other. The second pipe portion 23 can be correspondingly provided with a through hole 230 or a screw hole for connecting with the connecting rod 1 through the connecting member 4, and the connecting structure with the connecting rod 1 can refer to the connecting structure between the two connecting rods. The connecting rod 22 and the second pipe portion 23 connected to the first pipe portion 21 are mainly used for demonstrating the offset slider-crank mechanism, and the connecting rod 22 and the second pipe portion 23 may not be provided in the case where the offset slider-crank mechanism does not need to be demonstrated.
This guide arm mechanism demonstration teaching aid uses guide arm 2, sliding sleeve 3, connecting piece 4 and the first connecting rod 1a and the second connecting rod 1b of different length through the combination, can demonstrate following several kinds of guide arm mechanisms:
1. offset crank slide block mechanism
As shown in fig. 7, the offset crank-slider mechanism includes a guide rod 2, a sliding sleeve 3 slidably coupled to the guide rod 2, a first connecting rod 1a rotatably connected to the sliding sleeve 3, and a second connecting rod 1b connected between the first connecting rod 1a and the guide rod 2, wherein the second connecting rod 1b is connected to a second pipe portion 23 of the guide rod 2. The length of the first link 1a is greater than the length of the second link 1 b.
The guide rod 2 is fixed to drive the second connecting rod 1b to rotate around the axis of the second pipe part 23 in a whole circle, and at the moment, the sliding sleeve 3 is driven by the first connecting rod 1a to reciprocate along the axis of the polished rod 20, so that the offset crank sliding block mechanism is demonstrated.
2. Centering type crank slider mechanism
As shown in fig. 8, the second connecting rod 1b of the offset slider-crank mechanism is connected to the first tube portion 22 of the guide rod 2, so as to form a concentric slider-crank mechanism.
The guide rod 2 is fixed, the second connecting rod 1b is driven to rotate around the axis of the first pipe part 22 in a whole circle, and at the moment, the sliding sleeve 3 is driven by the first connecting rod 1a to reciprocate along the axis of the polished rod 20, so that the centering type crank sliding block mechanism is demonstrated.
3. Rotary guide rod mechanism
The composition mode of the rotating guide rod mechanism is basically consistent with that of the centering type crank sliding block mechanism.
Referring to fig. 8, the second link 1b is fixed, the driving guide 2 rotates around the axis of the first pipe 22, and the first link 1a rotates around the axis of the joint of the first and second links 1a and 1b, and the sliding sleeve 3 reciprocates on the polished rod 20, demonstrating the rotating guide mechanism.
Since the second link 1b is fixed, a hand or other fixing member for fixing the second link 1b needs to escape from the first link 1a during the rotation of the guide bar 2. A second connecting rod 1b 'may be connected to the first connecting rod 1a (a longer connecting member 4 may be selected to connect the three rod members), and as shown in fig. 9, the first connecting rod 1a may be rotated after the second connecting rod 1 b' is fixed, which is more smooth.
4. Swing guide rod mechanism
As shown in fig. 10, the first link 1a and the second link 1b in the center crank-slider mechanism are exchanged in position, i.e., a swing link mechanism is combined.
The first connecting rod 1a is fixed, the second connecting rod 1b is driven to rotate around the axis of the joint of the first connecting rod 1a and the second connecting rod 1b in a whole circle, and at the moment, the guide rod 2 is driven by the sliding sleeve 3 to swing around the axis of the first pipe part 22 in a reciprocating mode, so that a swing guide rod mechanism is demonstrated.
In fig. 10, the first link 1a is located between the second link 1b and the guide bar 2, as shown in fig. 11, the first link 1a may be connected to the outside, and in this case, a longer connecting member 4 is needed to connect the first link 1a and the guide bar 2, and in order to enhance the aesthetic property, a bushing 6 may be arranged between the first link 1a and the guide bar 2 to shield the exposed connecting member 4, and the bushing 6 may be a thickened pad 5.
5. Crank rocker mechanism
The composition mode of the crank rocker mechanism is basically consistent with that of a centering crank sliding block mechanism.
Referring also to fig. 8, the first connecting rod 1a is fixed, the second connecting rod 1b is driven to rotate around the axis of the joint of the first and second connecting rods 1a and 1b in a whole circle, and the sliding sleeve 3 swings back and forth around the axis of the second sleeve part 31, so that a crank rocker mechanism is demonstrated.
6. Movable guide rod mechanism
The composition mode of the crank rocker mechanism is basically consistent with that of a centering crank sliding block mechanism.
Referring also to fig. 8, the sliding sleeve 3 is fixed, the first connecting rod 1a is driven to swing back and forth around the axis of the second sleeve part 31, and the guide rod 2 moves back and forth up and down in the sliding sleeve 3, demonstrating the moving guide rod mechanism.
It can be understood that if use the utility model provides a four connecting rod end to end connection can also constitute the plane four-bar linkage of multiple difference, and the teaching scope can further expand.
The guide rod mechanism demonstration teaching aid of the utility model can selectively connect the connecting rod with the first pipe part or the second pipe part by arranging the first pipe part and the second pipe part which are connected with the polished rod, so that the teaching aid can demonstrate an alignment crank block mechanism and an offset crank block mechanism, and the functions are more comprehensive; in addition, through changing the connecting rods with different lengths or changing the positions of the fixed rod pieces, various guide rod mechanisms can be demonstrated, and the teaching of teachers is facilitated.
Claims (10)
1. The utility model provides a guide arm mechanism demonstration teaching aid, its include first connecting rod (1a), with first connecting rod (1a) rotatable coupling's second connecting rod (1b), with first connecting rod (1a) rotatable coupling's sliding sleeve (3) and with sliding sleeve (3) slip connect guide arm (2) of joining in marriage, its characterized in that: the guide rod (2) comprises a polish rod (20), a first pipe part (21) connected with the polish rod (20) and a second pipe part (22) offset outside the axis of the polish rod (20), and the first connecting rod (1a) can be selectively and rotatably connected with the first pipe part (21) or the second pipe part (22).
2. The guide-bar mechanism demonstration teaching aid of claim 1, wherein: it further comprises a connecting piece (4), said connecting piece (4) being connected between said first connecting rod (1a) and said first tube part (21) or between said first connecting rod (1a) and a second tube part (22).
3. The guide-bar mechanism demonstration teaching aid of claim 2, wherein: the connecting piece (4) is rotatably connected with the first connecting rod (1a) and fixedly connected with the first pipe part (21) or the second pipe part (22).
4. A guide rod mechanism demonstration teaching aid according to claim 2 or 3, wherein: two ends of the first connecting rod (1a) and the second connecting rod (1b) are respectively provided with a first sleeve (11) and a second sleeve (12).
5. The guide-bar mechanism demonstration teaching aid of claim 4, wherein: the first sleeve (11) is provided with a first threaded hole (110) in threaded connection with the connecting piece (4); the second sleeve (12) is provided with a through hole (120) for the connecting piece (4) to pass through.
6. The guide-bar mechanism demonstration teaching aid of claim 5, wherein: and a second threaded hole (111) communicated with the through hole (120) is formed in the second sleeve (12) in the radial direction, and a set screw (112) is arranged in the second threaded hole (111).
7. The guide-bar mechanism demonstration teaching aid of claim 5, wherein: the connecting piece is characterized by further comprising a spacer bush (121) arranged in the through hole (120), and the connecting piece (4) penetrates through the spacer bush (121).
8. The guide-bar mechanism demonstration teaching aid of claim 7, wherein: the spacer bush (121) is in clearance fit with the through hole (120); the connecting piece (4) is in transition fit with the spacer bush (121); the axial length of the spacer (121) is slightly longer than that of the through hole (120).
9. A guide rod mechanism demonstration teaching aid according to any of claims 1 to 3, wherein: the length of the first connecting rod (1a) is greater than that of the second connecting rod (1 b); or the length of the first link (1a) is smaller than the length of the second link (1 b).
10. A guide rod mechanism demonstration teaching aid according to claim 7 or 8, wherein: and gaskets (5) are arranged at two ends of the spacer bush (121).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921471587.9U CN210722112U (en) | 2019-09-05 | 2019-09-05 | Guide rod mechanism demonstration teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921471587.9U CN210722112U (en) | 2019-09-05 | 2019-09-05 | Guide rod mechanism demonstration teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210722112U true CN210722112U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921471587.9U Active CN210722112U (en) | 2019-09-05 | 2019-09-05 | Guide rod mechanism demonstration teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210722112U (en) |
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- 2019-09-05 CN CN201921471587.9U patent/CN210722112U/en active Active
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