CN221423611U - Length-adjustable stress application mechanism - Google Patents
Length-adjustable stress application mechanism Download PDFInfo
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- CN221423611U CN221423611U CN202323531485.0U CN202323531485U CN221423611U CN 221423611 U CN221423611 U CN 221423611U CN 202323531485 U CN202323531485 U CN 202323531485U CN 221423611 U CN221423611 U CN 221423611U
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- wedge ring
- rotary wedge
- connecting rings
- face
- spiral
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- 230000007246 mechanism Effects 0.000 title claims abstract description 26
- 230000009471 action Effects 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Abstract
The utility model discloses a length-adjustable stress application mechanism, which comprises a rotary wedge ring and two connecting rings, wherein the two connecting rings are respectively sleeved at the two axial ends of the rotary wedge ring in a rotating way and coaxial, at least one spiral surface is arranged on at least one of the upper end surface and the lower end surface of the rotary wedge ring, the two connecting rings are connected with an external mechanism and mutually close under the action of external force, the end surfaces of the rotary wedge ring are matched and contacted with the end surfaces of the connecting rings in an anastomotic way, the two connecting rings are gradually separated along the axial direction when torque is applied to rotate the rotary wedge ring, and the end surfaces of the rotary wedge ring are always at least partially contacted with the end surfaces of the connecting rings. The utility model sets the rotary wedge ring to be screwed with the two connecting rings, sets the spiral surface on the contact end surface, achieves the aim of adjusting the distance between the two connecting rings by using the spiral surface, can realize high-precision position adjustment, can realize position locking by self-locking or torque maintenance, and realizes large force application by using smaller torque.
Description
Technical Field
The utility model belongs to the technical field of pre-tightening and clamping, and particularly relates to a length-adjustable stress application mechanism.
Background
The common force loading mechanism mainly comprises a screw nut pair, an oil hydraulic cylinder and the like. The screw nut pair has small bearing surface at the tooth root part, so that the screw nut pair can receive larger shear stress under the heavy load action, and the tooth root part is frequently sheared and failed. The piston rod of the oil hydraulic cylinder normally only has two limit positions of forward and backward under the action of oil pressure, if the extending distance of the piston rod needs to be adjusted, a complex control oil circuit system is needed, and the use and maintenance cost of hydraulic oil are high.
The present utility model has been made in view of this.
Disclosure of utility model
The utility model aims to solve the technical problems of overcoming the defects of the prior art, providing a length-adjustable stress application mechanism,
In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that:
The length-adjustable force-applying mechanism comprises a rotary wedge ring and two connecting rings, wherein the two connecting rings are respectively and rotatably sleeved at the two axial ends of the rotary wedge ring and are coaxial with each other,
At least one of the upper end face and the lower end face of the rotary wedge ring is provided with at least one spiral surface, the two connecting rings are connected with an external mechanism and are mutually close to each other under the action of external force, the end faces of the rotary wedge ring are matched and contacted with the end faces of the connecting rings in an anastomotic manner,
The torque is applied to rotate the rotary wedge ring so that the two connecting rings are gradually far away in the axial direction, and the end face of the rotary wedge ring is always at least partially contacted with the end face of the connecting ring.
Further, the radial section of the spiral surface is a straight line segment, an inclined line segment, a curved line segment, a folded line segment and an arc line segment.
Further, the number of the helicoids on the same end face is several, and the rising angles alpha of the helicoids are consistent.
Further, the pair number n of helicoids on the same end face has the following relationship with the lead angle alpha of the helicoids, the pitch diameter d of the helicoids and the height difference a of the helicoids:
And when the lift angle alpha is smaller than the friction angle, the two connecting rings are in a self-locking state.
Further, a copper sliding plate for reducing friction force is arranged between the end face of the rotary wedge ring and the end face of the connecting ring.
Further, grooves and protrusions for applying torque are formed in the circumferential outer wall of the rotary wedge ring.
Further, a gear and a belt wheel are arranged on the circumferential outer wall of the rotary wedge ring.
By adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects.
The utility model sets the rotary wedge ring to be screwed with the two connecting rings, sets the spiral surface on the contact end surface, achieves the purpose of adjusting the distance between the two connecting rings by using the spiral surface, can realize high-precision position adjustment, can realize position locking by self-locking or torque maintenance, and realizes large stress application by using smaller torque.
The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is a schematic diagram of another embodiment of the present utility model;
FIG. 3 is a schematic view of the present utility model with the number of spirals n of 1, 2, 3 on the same end face;
FIG. 4 is a schematic view of the structure of the spiral surface of the present utility model when the spiral surface is radially cut into a folded line segment and an arc segment;
Fig. 5 is a schematic view of the lead angle of the helicoid of the present utility model.
In the figure: 1. rotating the wedge ring; 2. a connecting ring; 21. a first connecting ring; 22. a second connecting ring; 31. a gear; 32. a groove; 4. copper skateboard.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of 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 "upper", "lower", "front", "rear", "left", "right", "vertical", "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.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Examples
As shown in fig. 1 to 5, the length-adjustable force mechanism in this embodiment includes a rotary wedge ring 1 and two connecting rings 2, where the two connecting rings 2 are respectively rotatably sleeved at two axial ends of the rotary wedge ring 1 and are coaxial with each other. Specifically, the rotary wedge ring comprises a rotary wedge ring 1 and two connecting rings 2, the two connecting rings 2 are respectively coaxially sleeved with the rotary wedge ring 1 from two ends, the connecting rings 2 are connected with an outer side mechanism and do not rotate around an axis, the rotary wedge ring 1 rotates around the axis, and the two connecting rings 2 and the rotary wedge ring 1 are coaxially arranged.
At least one spiral surface is arranged on at least one of the upper end surface and the lower end surface of the rotary wedge ring 1, and the end surface of the rotary wedge ring 1 is in matched and anastomotic contact with the end surface of the connecting ring 2. The upper end face and the lower end face of the rotary wedge ring 1 are provided with spiral faces, at least one of the end faces is provided with one spiral face, and the end faces of the connecting rings 2 are matched with the spiral faces, if the upper end face of the rotary wedge ring 1 is provided with one spiral face and the lower end face is a plane, the upper connecting ring 21 is also provided with the spiral face corresponding to the spiral face, and the lower connecting ring 22 is also provided with the plane corresponding to the spiral face. The contact surface of the rotary wedge ring 1 and the connecting ring 2 is set to be a spiral ascending surface with the same lift angle, and can be a plane or a curved surface with any shape, namely, the radial section of the spiral surface is a straight line segment, an inclined line segment, a curved line segment, a folded line segment and an arc line segment, and the radial section of the spiral surface is an inclined line segment or a curved line segment when the spiral surface is an inclined plane or a curved surface, which is shown in the schematic drawing in fig. 3. Fig. 4 illustrates a triangle track and a circular arc track, the radial section of the spiral surface of the triangle track is a folded line section and an arc line section, the shape of the track can ensure that three rings are concentric, the three rings are not easy to misplace, and the track can also play a role in limiting and guiding during rotation.
The two connecting rings 2 are connected with an external mechanism, are mutually close under the action of external force, the torque is applied to rotate the rotary wedge ring 1, so that the two connecting rings 2 are gradually far away along the axial direction, and the end face of the rotary wedge ring 1 is always at least partially contacted with the end face of the connecting ring 2. The figure shows that the two connecting rings 2 are subjected to the pressure action of an external connecting mechanism, the two connecting rings are close to each other due to the external pressure, a torque is applied to the rotary wedge ring 1, the relative distance between the end faces of the two connecting rings at the outer side can be increased during rotation, the effect of adjusting the distance is realized, after the distance adjustment of the outer side mechanism is completed and the distance is fixed, the torque is continuously applied to the rotary wedge ring 1, the mechanism applies thrust to the two sides, and the two connecting rings continuously generate a trend of mutual separation.
Any number of spiral surfaces can be arranged on the same end surface, such as two, three and the like (the structures when the contact surfaces are 1, 2 and 3 are shown in fig. 3), and the advantage of the contact surfaces is that the connecting ring 2 is stressed and balanced when the force is applied, and no bending moment exists. The spiral faces positioned on the same end face are a plurality of, the rising angles alpha of the spiral faces are consistent, the rotation angles and the supporting angles of the plurality of spiral faces are synchronous, and the stress is uniform. If only one spiral surface is arranged on the same end surface, after the rotary wedge ring 1 rotates once, the distance moved by the first connecting ring 21 is the spiral surface height difference a, the distance moved by the second connecting ring 22 is the spiral surface height difference b, the adjustable distance range of the mechanism is [0, a+b ], and in order to ensure that the end surface of the rotary wedge ring 1 is always contacted with the end surface of the connecting ring 2, the adjustment distance cannot reach a+b. a and b are any value, which may be the same or different, and at least one is other than 0.
The spiral directions of the spiral surfaces on the same end face are consistent, and the spiral surfaces are clockwise or anticlockwise rotated as shown in the drawings; if the two connecting rings 2 are provided with spiral surfaces, the spiral directions of the spiral surfaces of the two connecting rings 2 are opposite, and the drawing shows that the wedge ring cannot rotate if the spiral directions are consistent.
Taking three sections of helicoids as an example, one end of the helicoids is unfolded into a plane to form a right triangle, then the lift angle of the logarithm n of the helicoids and the helicoids is alpha, the pitch diameter d of the helicoids (refer to the diameter of the central position of the helicoids), the schematic r of fig. 5 is the radius of the central line of the helicoids, the circular arc length of the central line of the helicoids is pi d/n, and the altitude difference a of the helicoids has the following relation:
When the lift angle alpha is smaller than the friction angle, the mechanism can realize self-locking, namely, the applied torque is removed, the adjusted distance can be kept in a self-locking mode, and at the moment, the two connecting rings 2 are kept still.
At least one torque application position is arranged on the rotary wedge ring 1, and the rotary wedge ring can be divided into a plurality of positions, for example, the torque required in the distance adjustment process is small, the torque required in the force application process is large, so that the small torque application position and the large torque application position can be respectively arranged. Different torque application positions may be set according to rotation accuracy, speed, and the like. Or only one position can be arranged, and the distance adjustment and the stress application are shared. The form of torque applied may be any, such as gears 31, pulleys, sprockets, wrench grooves or direct drives, etc. As shown in the drawing, two grooves 32 for applying torque are provided on the circumferential outer wall of the rotary wedge ring 1 for small torque rotation, and gears 31 are provided on the circumferential outer wall thereof for large torque.
During operation, relative rotation exists between the rotary wedge ring 1 and the connecting ring 2, and in order to reduce the friction force of contact surfaces of the rotary wedge ring 1 and the connecting ring, a copper sliding plate 4 is added between the connecting ring 2 and the rotary wedge ring 1, so that the influence of friction force is reduced, and further, the rotary torque and the rotary angle are accurately controlled. The mechanism of the embodiment has the advantages that:
1. The distance between the two connecting rings can be adjusted by rotating the wedge ring, the distance can be kept unchanged under the action of load by self-locking or torque maintenance, and the structure is simple and stable;
2. The rotating angle corresponds to the distance change accurately, and the high-precision position change can be realized by controlling the rotating precision;
3. The lead angle of the spiral surface has a reinforcing effect, so that a large reinforcing effect can be realized by smaller torque.
The foregoing description is only illustrative of the preferred embodiment of the present utility model, and is not to be construed as limiting the utility model, but is to be construed as limiting the utility model to any and all simple modifications, equivalent variations and adaptations of the embodiments described above, which are within the scope of the utility model, may be made by those skilled in the art without departing from the scope of the utility model.
Claims (7)
1. The utility model provides an afterburning mechanism of adjustable length which characterized in that: comprises a rotary wedge ring (1) and two connecting rings (2), wherein the two connecting rings (2) are respectively sleeved at the two axial ends of the rotary wedge ring (1) in a rotating way and are coaxial,
At least one of the upper end face and the lower end face of the rotary wedge ring (1) is provided with at least one spiral face, the two connecting rings (2) are connected with an external mechanism and are mutually close to each other under the action of external force, the end faces of the rotary wedge ring (1) are matched and contacted with the end faces of the connecting rings (2) in an anastomotic manner,
The torque is applied to rotate the rotary wedge ring (1) so that the two connecting rings (2) are gradually far away along the axial direction, and the end face of the rotary wedge ring (1) is always at least partially contacted with the end face of the connecting ring (2).
2. The adjustable length force mechanism of claim 1, wherein: the radial section of the spiral surface is a straight line segment, an inclined line segment, a curved line segment, a folded line segment and an arc line segment.
3. The adjustable length force mechanism of claim 1, wherein: the number of the spiral faces positioned on the same end face is several, and the rising angles alpha of the spiral faces are consistent.
4. A length adjustable force applying mechanism according to claim 3, wherein the pair of helicoids n on the same end face has the following relationship with the rise angle of the helicoids α, the pitch diameter d of the helicoids, and the height difference a of the helicoids:
and when the lift angle alpha is smaller than the friction angle, the two connecting rings (2) are in a self-locking state.
5. The length-adjustable force mechanism according to claim 1, wherein a copper slide plate (4) for reducing friction force is arranged between the end face of the rotary wedge ring (1) and the end face of the connecting ring (2).
6. A length adjustable forcing mechanism according to claim 1, characterized in that the circumferential outer wall of the rotating wedge ring (1) is provided with grooves (32), protrusions for applying torque.
7. The length-adjustable force mechanism according to claim 1, wherein the circumferential outer wall of the rotary wedge ring (1) is provided with a gear (31) and a belt wheel.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221423611U true CN221423611U (en) | 2024-07-26 |
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