CN220516548U - Positioning and clamping structure in hole - Google Patents
Positioning and clamping structure in hole Download PDFInfo
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- CN220516548U CN220516548U CN202321593201.8U CN202321593201U CN220516548U CN 220516548 U CN220516548 U CN 220516548U CN 202321593201 U CN202321593201 U CN 202321593201U CN 220516548 U CN220516548 U CN 220516548U
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- 230000007704 transition Effects 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 19
- 230000000149 penetrating effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses an in-hole positioning and clamping structure, which is characterized in that a rotating part with a rotating hole, a driving part for driving the rotating part to rotate and an expanding part are arranged, the driving part is arranged in the rotating hole of the rotating part in a penetrating way, the expanding part is embedded at one end of the driving part, interference fit between the rotating hole and the driving part is realized, the rotating part can normally rotate and work, the structure is simple and ingenious, the installation space of the driving part is saved, the utilization rate and the movement space of the end face of the rotating part are improved, and the application and popularization of the in-hole positioning and clamping structure in the technical field of hole shaft installation are facilitated.
Description
Technical Field
The utility model relates to the technical field of hole shaft installation, in particular to a hole positioning and clamping structure.
Background
Hole-shaft fit refers to the relationship between mutually combined holes and shaft tolerance bands of the same basic dimensions, the degree of tightness of the combination is determined, the algebraic difference obtained by subtracting the dimensions of the matched shafts from the dimensions of the holes is called clearance when the hole dimensions are positive, interference when the hole dimensions are negative, and sometimes the interference is negative, and the clearance fit, interference fit and transition fit mainly exist.
The interference fit of the bore shaft can limit 4 degrees of freedom of the rotary part. In most cases, the one-way movement of the part to which the hole belongs along the shaft is limited by virtue of the shoulder effect of the shaft, namely, 0.5 degrees of freedom of the hole relative to the shaft in the axial direction are limited. For simultaneous high speed rotation of the bore shaft, it is required to remain relatively stationary with respect to each other, i.e. to limit 6 degrees of freedom of the bore part with respect to the shaft part. Wherein rotational movement about a common axis is typically limited by a transition fit and interference fit between the bore and the shaft, and the other end of the bore is typically limited by an axial end part to another 0.5 degrees of freedom of the rotary type part.
If the rotary part is a working part with a larger length-diameter ratio, such as a small-sized grinding wheel, a conventional mounting mode is adopted, a clearance fit is adopted between the driving main shaft and the grinding wheel, and in addition, the axial freedom degree control constraint is carried out on the part of the hole through the shaft shoulder and the shaft end part of the main shaft, such as axial positioning constraint is carried out through the shaft end nut. The installation mode determines the working surface of the rotary part, is the side surface of the rotary part, naturally increases the length of the shaft, installation space and the like due to the existence of the shaft end part, limits the utilization of the end surface of the part to which the hole belongs, and limits the space motion state of the rotary part and the like.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide the in-hole positioning and clamping structure which is simple and ingenious in structure, and through arranging the rotating part with the rotating hole in the structure, the driving part for driving the rotating part to rotate and the expanding part, the rotating hole is in interference fit with the driving part, so that the rotating part can work normally, the installation space is saved, the utilization rate of the end face of the rotating part is improved, and the application and popularization of the in-hole positioning and clamping structure in the technical field of hole shaft installation are facilitated.
In order to achieve the aim, the in-hole positioning and clamping structure comprises a rotating piece, a driving piece and an expanding piece, wherein the rotating piece is internally provided with a rotating hole, the driving piece is used for driving the rotating piece to rotate, the driving piece is arranged in the rotating hole of the rotating piece in a penetrating mode, the expanding piece is embedded into one end of the driving piece, and the rotating hole is in interference fit with the driving piece.
As a preferable mode of the utility model, the driving member comprises a driving part and a limiting part, wherein the driving part is positioned in the rotating hole, and the limiting part is positioned outside the rotating hole.
In a preferred embodiment of the present utility model, a fixing hole is formed in a side of the driving part, and the expansion element is installed in the fixing hole.
As a preferable mode of the present utility model, the center line of the fixing hole and the center line of the driving part are positioned on the same straight line.
As a preferred embodiment of the present utility model, the driving part is in interference fit with the rotation hole.
As a preferred embodiment of the present utility model, the limiting portion is closely attached to the rotating member.
As a preferred embodiment of the present utility model, when the expansion member is not mounted, the driving member and the rotation hole are in clearance fit or transition fit.
As a preferred aspect of the present utility model, the expansion element and the fixing hole are in interference fit.
As a preferable mode of the present utility model, the driving portion and the limiting portion are both cylindrical.
As a preferred embodiment of the present utility model, the driving member material is stainless steel.
Compared with the prior art, the method has the following beneficial effects: according to the in-hole positioning and clamping structure, the rotating piece with the rotating hole, the driving piece and the expanding piece are arranged, the driving piece is arranged in the rotating hole of the rotating piece in a penetrating mode, the expanding piece is embedded into one end of the driving piece, interference fit between the rotating hole and the driving piece is achieved, the rotating piece can normally rotate, the structure is simple and ingenious, the installation space of the driving piece is saved, the utilization rate of the end face of the rotating piece and the movement space are improved, and the application and popularization of the in-hole positioning and clamping structure in the technical field of hole shaft installation are facilitated.
Further, the expansion piece of this structure is installed in the one end of driving piece, makes the driving piece expand and realizes the interference fit with the rotation piece, has guaranteed that rotation piece and driving piece are static relatively, has promoted installation effectiveness.
Further, the driving piece of the structure is provided with a limiting part which is clung to one end of the rotating piece, and the limiting function is achieved on the rotating piece in the axis direction.
Further, the driving piece of this structure is equipped with drive portion and fixed orifices, and the central line coincidence of fixed orifices and drive portion, because the extension piece is installed in the fixed orifices, has guaranteed the homogeneity of extension piece to drive portion expansion, makes the driving piece combine compacter with rotating the piece.
Further, the expansion piece of the structure is arranged on the driving part and is in interference fit with the driving part, so that the driving part can be expanded to be combined with the rotating piece, and the stability of the installation of the driving part is ensured.
Drawings
FIG. 1 is a schematic structural view of a positioning and clamping structure in a hole in an embodiment;
FIG. 2 is a top view of a positioning and clamping structure in an aperture according to an embodiment;
fig. 3 is a schematic structural view of a driving member of an in-hole positioning and clamping structure in an embodiment.
Reference numerals: 1. a rotating member; 11. a rotation hole; 2. a driving member; 21. a driving section; 211. a fixing hole; 22. a limit part; 3. an expansion piece.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
Example 1: as shown in fig. 1 to 3, a positioning and clamping structure in a hole mainly comprises a rotating member 1 with a rotating hole 11, a driving member 2 and an expanding member 3, wherein the driving member 2 and the expanding member 3 are used for driving the rotating member 1 to rotate, the rotating member 1 is a rotating part, the driving member 2 is a driving main shaft, the expanding member 3 is a slotted cone end set screw, one end of the driving member 2 is arranged in the rotating hole 11 of the rotating member 1 in a penetrating manner, the expanding member 3 is embedded at one end of the driving member 2 combined with the rotating member 1, the rotating hole 11 is in interference fit with the driving member 2, the installation of the rotating member 1 is realized, the rotating member 1 and the driving member 2 are relatively static, the driving member 2 rotates, the driving member 1 is driven to rotate, the installation space of the driving member 2 is saved, and the end face utilization rate and the movement space of the rotating member 1 are improved.
The driving member 2 of the present embodiment includes a driving portion 21 and a limiting portion 22, the driving portion 21 is a driving shaft, the limiting portion 22 is a shaft shoulder, the driving portion 21 is mounted on the limiting portion 22, and the limiting portion 22 is tightly attached to a side end surface of the rotating member 1 to abut against the rotating member 1, so as to play a limiting role on the rotating member 1 along the axial direction of the driving member 2.
In order to enable the driving member 2 to be installed in the rotating member 1, a rotating hole 11 is formed in the rotating member 1, the driving portion 21 is inserted into the rotating hole 11, the driving portion 21 does not exceed the other end face of the rotating member 1, installation space of the driving member 2 can be saved, at this time, the rotating member 1 and the driving member 2 are in clearance fit or transition fit, and the rotating member 1 is not completely fixed on the driving member 2 and can rotate freely.
In order to make the rotary member 1 and the driving member 2 relatively stationary, a fixed hole 211 is formed at a side end of the driving portion 21 to a certain depth, then the fixed hole 211 is threaded, and then an opening treatment of a cross shape or 120 degrees is performed along an axial direction, so that the opening is performed to a middle portion of the hole shaft fit, and the bottom of the internal thread is not reached, namely, the shaft end is an open thread center hole. The fixing hole 211 is arranged to coincide with the center line of the driving part 21, and the expanding piece 3 is arranged in the fixing hole 211, so that the uniformity of expanding the expanding piece 3 on the driving part 21 is ensured, and the combination of the driving piece 2 and the rotating piece 1 is tighter.
Further, the expansion element 3 is tightly screwed along the open thread center hole at the end of the driving part 21, and the end of the driving part 21 is radially expanded due to the screwing external force, so that the gap between the driving part 21 and the inner hole of the rotating element 1 is further reduced. Therefore, the matching mode between the rotating piece 1 and the driving piece 2 is gradually changed into an interference fit state from the original clearance fit or transition fit in the screwing-in process of the expanding piece 3, so that the constraint of the freedom degree between the rotating piece 1 and the driving piece 2 is realized, namely, the driving part 21 is gradually expanded in the screwing-in process, the constraint of the radial freedom degree is gradually enhanced, and the constraint fit of the small radial 0 freedom degree or nearly 0 freedom degree of the clearance fit or transition fit is gradually increased to the constraint fit of 4 freedom degrees; at the same time, the fit of the axial degrees of freedom is increased from a constraint of nearly 0 to a constraint fit of 2 degrees of freedom. During the screwing-in of the expansion element 3, a change of the way of cooperation between the rotation element 1 and the driving element 2 is achieved, and the relative degree of freedom between the two is completely defined, i.e. no relative movement exists between the two.
Specifically, the expansion member 3 is positioned in the cantilever Liang Zhuangtai with a larger clamping force for the distal screw tightening and a smaller clamping force for the open end, similar to a cantilever mechanism. The taper of the tail end is designed according to the self-locking angle of the rotating surface thread, so that the self-locking of the thread between the expansion piece 3 and the end part of the driving part 21 is realized, the expansion piece 3 can be tightly arranged on the driving piece 2, and the interference fit state between the driving piece 2 and the rotating piece 1 is ensured. The installation method ensures that the fixing of the rotating piece 1 is simpler, the installation end of the driving piece 2 is positioned in the rotating piece 1, the use area of the outer end surface of the rotating piece 1 is increased, and the working space and the efficiency are improved.
In order to enable the rotating member 1 to work normally, the driving part 21 and the limiting part 22 are both cylindrical, the driving part 21 is matched with the structure of the rotating member 1, the driving part 21 is installed in the rotating hole 11, the limiting part 22 is arranged outside the rotating hole 11, the rotating member 1 can be tightly attached to the limiting part 22 to rotate, the working stability of the rotating member 1 is guaranteed, the driving member 2 is made of stainless steel, the driving member is good in strength, convenient to process, and provides an installation space for the expanding member 3, and the strength of the whole structure is improved.
According to the in-hole positioning and clamping structure, the rotating piece 1 with the rotating hole 11 is arranged in the hole, the driving piece 2 and the expanding piece 3 for driving the rotating piece 1 to rotate are arranged, the driving piece 2 is arranged in the rotating hole 11 of the rotating piece 1 in a penetrating mode, the expanding piece 3 is embedded at one end of the driving piece 2, interference fit between the rotating hole 11 and the driving piece 2 is achieved, the rotating piece 1 can normally rotate, the structure is simple and ingenious, the installation space of the driving piece 2 is saved, the end face utilization rate of the rotating piece 1 and the movement space are improved, and the application and popularization of the in-hole positioning and clamping structure in the technical field of hole shaft installation are facilitated.
Example 2: the present embodiment is different from embodiment 1 in that: in the hole positioning clamping structure in the embodiment, a key groove is formed in a rotating hole 11 of a rotating piece 1, a corresponding key groove is formed in a driving part 21 at the mounting end of a driving piece 2, a flat key is arranged in the key groove of the driving piece 2, the driving piece 2 is inserted into the rotating piece 1, the rotating piece 1 and the driving piece 2 are connected through the flat key, an expanding piece 3 is mounted, interference fit is realized between the rotating piece 1 and the driving piece 2, flat key mounting is increased, the combination firmness degree of the rotating piece 1 and the driving piece 2 can be improved, and the working stability of the whole structure is ensured.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model; thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more herein: 1. a rotating member; 11. a rotation hole; 2. a driving member; 21. a driving section; 211. a fixing hole; 22. a limit part; 3. expansion member, etc., but does not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.
Claims (10)
1. Positioning and clamping structure in hole, its characterized in that: including interior rotating member (1) that is equipped with rotation hole (11), drive rotating member (1) pivoted driving piece (2) and extension piece (3), driving piece (2) wear to locate in rotating member (1) rotation hole (11), extension piece (3) inlay locate driving piece (2) one end, rotation hole (11) with interference fit between driving piece (2).
2. The in-hole positioning and clamping structure according to claim 1, wherein: the driving piece (2) comprises a driving part (21) and a limiting part (22), wherein the driving part (21) is positioned in the rotating hole (11), and the limiting part (22) is positioned outside the rotating hole (11).
3. The in-hole positioning and clamping structure according to claim 2, wherein: the side of the driving part (21) is provided with a fixing hole (211), and the expansion piece (3) is arranged in the fixing hole (211).
4. A positioning and clamping structure in a hole according to claim 3, wherein: the center line of the fixing hole (211) is positioned on the same straight line with the center line of the driving part (21).
5. The in-hole positioning and clamping structure according to claim 4, wherein: the driving part (21) is in interference fit with the rotating hole (11).
6. The in-hole positioning and clamping structure according to claim 2, wherein: the limiting part (22) is tightly attached to the rotating piece (1).
7. The in-hole positioning and clamping structure according to claim 1, wherein: when the expanding piece (3) is not installed, the driving piece (2) and the rotating hole (11) are in clearance fit or transition fit.
8. A positioning and clamping structure in a hole according to claim 3, wherein: the expansion piece (3) is in interference fit with the fixing hole (211).
9. The in-hole positioning and clamping structure according to claim 8, wherein: the driving part (21) and the limiting part (22) are both cylindrical.
10. The in-hole positioning and clamping structure according to claim 9, wherein: the driving piece (2) is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321593201.8U CN220516548U (en) | 2023-06-21 | 2023-06-21 | Positioning and clamping structure in hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321593201.8U CN220516548U (en) | 2023-06-21 | 2023-06-21 | Positioning and clamping structure in hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220516548U true CN220516548U (en) | 2024-02-23 |
Family
ID=89938774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321593201.8U Active CN220516548U (en) | 2023-06-21 | 2023-06-21 | Positioning and clamping structure in hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220516548U (en) |
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2023
- 2023-06-21 CN CN202321593201.8U patent/CN220516548U/en active Active
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