CN219349400U - Limiting device of rotating mechanism - Google Patents

Abstract

The utility model describes a limiting device of a rotating mechanism, which is a limiting device for limiting the rotating range of the rotating mechanism, and comprises: the device comprises a base provided with a rotating mechanism, a rotating part linked with the rotating mechanism and a limiting part, wherein the rotating part is movably connected to the rotating mechanism, and the limiting part is arranged on the base and is configured to be contacted with the rotating part when the rotating mechanism rotates by a preset angle. According to the present utility model, a stopper device having a simple structure and capable of increasing the rotation range of the rotation mechanism and restricting the rotation mechanism can be provided.

Description

Limiting device of rotating mechanism

Technical Field

The utility model relates to a limiting device of a rotating mechanism.

Background

Along with the continuous development of precision measuring instruments, the requirements on measuring precision are higher and higher, and the rotating angle of a rotatable precision measuring head needs to be precisely controlled. In general, a rotation angle equal to 360 degrees can meet most measurement requirements. However, in practical production and use, it is often difficult to achieve an accurate 360 degree rotation range due to limitations of the manufacturing process and errors in the actual measurement. Therefore, a certain angle allowance is required to be set to enlarge the actual rotation range, so that the precise measuring instrument can be well controlled to complete the measuring requirements of actual production and application.

The utility model provides a 201820921042.2, the patent application name discloses a feedback and stop device for revolving stage in "a feedback and stop device for revolving stage", it is through setting up the bump at the quotation lower surface outside edge to and the rocking arm mount pad of supporting seat upper surface, through the rocking arm that bearing and rocking arm mount pad rotate to be connected, the both sides of rocking arm correspond to be provided with first dog and second dog, it drives the rocking arm through the bump, collides with first dog and second dog to realize rotation angle and be greater than 360 degrees technological effect.

However, the structure of the above-described limiting device is relatively complex. Meanwhile, the spacing effect is realized through the cooperation of a plurality of components, and more measurement errors are often brought.

Disclosure of Invention

The present utility model has been made in view of the above-described conventional circumstances, and an object of the present utility model is to provide a stopper device that has a simple structure, can increase the rotation range of a rotation mechanism, and can limit the rotation mechanism.

To this end, the present utility model provides a limiting device for a rotating mechanism, which limits a rotation range of the rotating mechanism, the limiting device comprising: the device comprises a base, a rotating part and a limiting part, wherein the base is provided with the rotating mechanism, the rotating part is in linkage with the rotating mechanism, the rotating part is movably connected with the rotating mechanism, and the limiting part is arranged on the base and is configured to be contacted with the rotating part when the rotating mechanism rotates by a preset angle.

Under this kind of circumstances, because rotation portion and rotary mechanism are swing joint, when rotation portion and spacing portion contact, can make rotary mechanism continue to rotate certain angle after rotatory default angle, and then can make rotation angle be greater than default angle to can satisfy the measurement demand betterly. Meanwhile, the limiting device can be based on the cooperation of fewer parts, and the composition structure of the limiting device is simpler and more convenient. In addition, because the effort that produces at each part complex in stop device's in-process can produce negative effect to rotary mechanism's rotation, based on the cooperation of less part, can further weaken negative effect to can improve rotary mechanism's rotation angle's accuracy, can further improve rotation accuracy.

In addition, in the limiting device according to the present utility model, the rotation mechanism may have a first groove and a first through hole communicating with the first groove. In this case, the rotating portion can be provided to the rotating mechanism conveniently, and the interlocking of the rotating mechanism and the rotating portion can be made more convenient.

In addition, in the limiting device according to the present utility model, optionally, the rotating portion includes a connecting portion that is matched with the first groove and rotatably disposed in the first groove, and a lever that is connected to the connecting portion and penetrates through the first through hole, and the first through hole limits movement of the lever in a preset direction. In this case, the connection portion and the first groove can be caused to move relatively. In addition, the movement direction and the movement amplitude of the lever can be limited based on the first through hole, so that the rotating part and the rotating mechanism can generate relative movement in the preset direction and can be limited in a certain relative movement range.

In addition, in the limiting device according to the present utility model, optionally, the first groove is disposed on a side of the rotation mechanism close to the base. In this case, the connection portion can be directly attached to the rotation mechanism through the first groove, so that the process of attaching or detaching the connection portion can be made easier.

In addition, in the limiting device according to the present utility model, optionally, the connecting portion is spherical, and a radial dimension of an opening of the first groove is not greater than a maximum radial dimension of the connecting portion. In this case, the connection portion can be reduced from falling off the opening of the first groove due to the action of gravity, and the stability of the connection portion provided in the rotation mechanism can be improved.

In addition, in the limiting device according to the present utility model, optionally, the limiting portion has a second groove that matches the lever. Under the condition, the second groove can facilitate the contact between the limiting part and the deflector rod to be in surface contact, so that the suitability of the deflector rod in contact with the limiting part can be improved, and the contact can be more stable.

In addition, in the limiting device according to the present utility model, optionally, the geometric center axis of the rotating portion is orthogonal to the geometric center axis of the rotating mechanism. In this case, the required length of the lever in the rotating portion can be reduced, so that the degree of integration of the limiting device can be increased, and the weight of the limiting device can be reduced while the structural size of the limiting device is reduced, whereby the rotation accuracy of the rotation mechanism can be improved.

In addition, in the limiting device according to the present utility model, optionally, the first through hole is a circular arc hole. In this case, compared with the first through hole (for example, polygonal hole) having other shapes, the shift lever can be adapted to the two ends of the circular arc hole extending outward, so that the rotation range of the shift lever can be increased as much as possible under the condition that the size of the first through hole is smaller, which is beneficial to maintaining the rigidity of the rotation mechanism.

In addition, in the limiting device according to the present utility model, optionally, the limiting portion is of a flexible structure, and the limiting portion is in flexible contact with the rotating portion. In this case, when the stopper portion is in flexible contact with the rotating portion, the negative influence of the acting force can be reduced, compared to the rigid contact, so that the accuracy of the rotation angle of the rotating mechanism can be improved.

In the limiting device according to the present utility model, the rotation mechanism may have a third groove provided on a side surface, and the rotation portion may be rotatably provided in the third groove via a rotation shaft. In this case, since the number of parts to be fitted can be reduced, the complexity of the structure can be further reduced. In addition, the convenience of the installation or the disassembly of the rotating part and the rotating mechanism can be improved.

According to the present utility model, a stopper device having a simple structure and capable of increasing the rotation range of the rotation mechanism and restricting the rotation mechanism can be provided.

Drawings

The utility model will now be explained in further detail by way of example only with reference to the accompanying drawings, in which:

fig. 1 is a perspective view showing a measuring instrument according to an example of the present utility model.

Fig. 2 is a perspective view showing a measuring seat according to an example of the present utility model.

Fig. 3 is a perspective view showing a part of the internal structure of the first sub-mount according to the example of the present utility model.

Fig. 4 is a front view showing a stopper and a rotation mechanism according to an example of the present utility model.

Fig. 5 is a structural view showing a rotating portion according to an example of the present utility model.

Fig. 6 is a schematic diagram showing another angle of the rotating mechanism according to the example of the present utility model.

Fig. 7 is a schematic view showing a stopper portion according to an example of the present utility model.

Fig. 8 is a schematic diagram showing another structure of the rotating mechanism according to the example of the present utility model.

Fig. 9 is a sectional view showing a part of the internal structure of the third groove in the stopper according to the example of the present utility model.

Reference numerals:

1 … measuring instrument, 2 … measuring seat, 3 … measuring head, 4 … working platform,

10 … first sub-mount, 20 … second sub-mount, 100 … rotation mechanism,

the geometric central axis of the L1 … rotating mechanism, 110 … first grooves, 120 … first through holes,

130 … second through-hole, 140 … third groove,

200 …,210 … base, 220 … rotating part, 230 … limiting part,

141 …,142 …,240 … spindle, 221 … connection,

222 … lever, 223 … sixth groove, 224 … third through hole, 231 … second groove, D1D2 … preset direction.

Detailed Description

Hereinafter, preferred embodiments of the present utility model will be described in detail with reference to the accompanying drawings. In the following description, the same members are denoted by the same reference numerals, and overlapping description thereof is omitted. In addition, the drawings are schematic, and the ratio of the sizes of the components to each other, the shapes of the components, and the like may be different from actual ones.

It should be noted that the terms "comprises" and "comprising," and any variations thereof, such as a process, method, system, article, or apparatus that comprises or has a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus, but may include or have other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In addition, headings and the like referred to in the following description of the utility model are not intended to limit the scope or content of the utility model, but rather are merely indicative of reading. Such subtitles are not to be understood as being used for segmenting the content of the article, nor should the content under the subtitle be limited only to the scope of the subtitle.

In the present embodiment, the stopper (hereinafter, simply referred to as a stopper) of the rotation mechanism according to the present utility model may be a stopper that restricts the rotation range of the rotation mechanism. In some examples, the limiting device may be applied to a precision measuring instrument (hereinafter may be simply referred to as a measuring instrument) in industry, such as a three-coordinate measuring machine, a laser interferometer, a scanning tunnel microscope, or the like.

Fig. 1 is a schematic perspective view showing a measuring instrument 1 according to an example of the present utility model. The coordinate system XYZ of fig. 1 adaptively shows the direction of the X-axis rail, the direction of the Y-axis rail, and the direction of the Z-axis rail of the present utility model.

In some examples, referring to fig. 1, a measuring instrument 1 may include a stage 2, a stylus 3, a work platform 4, and a rail motion system that controls movement of the stage 2 along a plurality of rails, which may include an X-axis rail motion system that controls movement of the stage 2 along an X-axis rail, a Y-axis rail motion system that controls movement of the stage 2 along a Y-axis rail, and a Z-axis rail motion system that controls movement of the stage 2 along a Z-axis rail, with the stylus 3 mounted to the Z-axis rail by the stage 2. In some examples, the direction of the X-axis rail, the direction of the Y-axis rail, and the direction of the Z-axis rail may be in a perpendicular relationship to one another.

In this case, the stylus 3 can be moved to a predetermined position in space based on the rail motion system, so that the geometric size, shape and position of the object to be measured on the work table 4 can be measured.

Fig. 2 is a perspective view showing a nest 2 according to an example of the present utility model. Fig. 3 is a perspective view showing a part of the internal structure of the first sub-mount 10 according to the example of the present utility model.

In some examples, referring to fig. 2, the nest 2 may include a first sub-nest 10 and a second sub-nest 20. In some examples, the first sub-mount 10 may be used to control rotation of the gauge head 3 in the horizontal direction, and the second sub-mount 20 may be used to control rotation of the gauge head 3 in the pitch direction. In this case, the stylus 3 can be rotated to an arbitrary posture in space.

In some examples, referring to fig. 3, the first sub-mount 10 may include a rotation mechanism 100. In some examples, the gauge head 3 may be coupled to the rotation mechanism 100. Thereby, the rotation of the probe 3 in the horizontal direction can be controlled based on the rotation mechanism 100.

In other examples, the second sub-mount 20 may include a rotation mechanism 100. Thereby, the rotation of the probe 3 in the pitch direction can be controlled based on the rotation mechanism 100.

The limiting device 200 according to the present utility model will be specifically described below by taking the example in which the rotation mechanism 100 is provided in the first sub-mount 10.

Fig. 4 is a front view showing the stopper 200 and the rotation mechanism 100 according to the example of the present utility model.

In some examples, referring to fig. 3 and 4, the first sub-mount 10 may include a stop device 200 and a rotation mechanism 100. In some examples, the rotation mechanism 100 may rotate in a horizontal direction about a geometric central axis L1 of the rotation mechanism 100. In this case, the rotation of the first sub-mount 10 in the horizontal direction can be controlled based on the rotation mechanism 100. Meanwhile, the rotation range of the first sub-mount 10 can be increased based on the limiting device 200 and the first sub-mount 10 can be limited.

In some examples, the rotation range of the rotation mechanism 100 may be 0 degrees to 360 degrees. In this case, the measurement requirements can be satisfied well.

Referring to fig. 3, in some examples, the spacing device 200 may include a turning portion 220 that is coupled to the rotation mechanism 100, and a spacing portion 230. In this case, the configuration of the stopper 200 can be simplified by the engagement of fewer components. In addition, the force generated during the process of fitting the components in the limiting device 200 may negatively affect the rotation of the rotation mechanism 100, and the negative effect may be further reduced by the fitting of fewer components, so that the accuracy of the rotation angle of the rotation mechanism 100 may be improved, and the rotation accuracy may be further improved.

In some examples, the stopper 230 may contact the rotation part 220 when the rotation mechanism 100 rotates by a preset angle. In some examples, the turning portion 220 is movably coupled to the rotation mechanism 100. In this case, based on the cooperation of the limiting part 230 and the rotating part 220, the rotating mechanism 100 can be rotated by a certain angle after rotating by a preset angle, and then the rotating angle can be larger than the preset angle, so that the measurement requirement can be better satisfied.

In some examples, the preset angle may refer to an angle by which the rotation mechanism 100 rotates when the rotation portion 220 contacts the limit portion 230.

In some examples, the preset angle may be approximately 360 degrees. Specifically, in some examples, the preset angle may be less than 360 degrees, e.g., the preset angle may be 355 degrees, 356 degrees, 357 degrees, 358 degrees, 359 degrees, or the like. In other examples, the preset angle may be greater than 360 degrees, for example, the preset angle may be 361 degrees, 362 degrees, 363 degrees, 364 degrees, 365 degrees, or the like. In some examples, the preset angle may be 360 degrees. In this case, the rotation mechanism 100 can drive the stylus 3 to perform multi-directional measurement.

Referring to fig. 3, in some examples, the spacing device 200 may also include a base 210. In some examples, the base 210 may be fixed to the first sub-mount 10. In other words, the base 210 may rest on the first sub-mount 10.

In some examples, the rotation mechanism 100 may be disposed above the base 210.

In some examples, the limit portion 230 may be provided to the base 210. In this case, the stopper 230 can be stationary on the first sub-mount 10, and when the rotating unit 220 rotates to contact with the stopper 230 in association with the rotation mechanism 100, the stopper 230 can apply a force to the rotating unit 220 to cause the rotating unit 220 to move relative to the rotation mechanism 100, thereby expanding the rotation range of the rotation mechanism 100.

In some examples, the stopper 230 and the base 210 may be a separate structure. In this case, the position of the stopper 230 can be adjusted based on the requirement, and the flexibility of the structure can be improved.

In some examples, the stop 230 and the base 210 may be a unitary structure. In this case, the stopper 230 can be fixedly connected to the base 210, and thus the stability of the stopper 230 can be improved.

In some examples, the radial dimension of the base 210 may be greater than the radial dimension of the rotary mechanism 100. This enables the rotation mechanism 100 to be preferably disposed above the base 210, and stability can be improved.

In some examples, the radial dimension of the base 210 may be equal to the radial dimension of the rotation mechanism 100. In some examples, the radial dimension of the base 210 may be less than the radial dimension of the rotary mechanism 100. In this case, by changing the shape of the stopper 230 so that the stopper 230 contacts the rotating portion 220, the effect of restricting the rotation mechanism 100 and expanding the rotation range of the rotation mechanism 100 can be achieved as well, and the degree of integration of the structure of the stopper 200 can be improved by reducing the radial dimension of the base 210.

Fig. 5 is a structural diagram showing a rotating portion 220 according to an example of the present utility model. Fig. 6 is a schematic diagram showing another angle of the rotating mechanism 100 according to the example of the present utility model. Fig. 7 is a schematic diagram showing a stopper 230 according to an example of the present utility model.

In some examples, referring to fig. 5, the rotating portion 220 may include a connecting portion 221 and a lever 222.

In some examples, the geometric central axis of the turning portion 220 may have an angle with the geometric central axis L1 of the rotary mechanism 100.

In some examples, preferably, the geometric central axis of the turning portion 220 may be orthogonal to the geometric central axis L1 of the rotation mechanism 100. In this case, the required length of the lever 222 in the rotating portion 220 can be reduced, so that the degree of integration of the stopper 200 can be increased, and the weight of the stopper 200 can be reduced while the structural size of the stopper 200 is reduced, whereby the rotation accuracy of the rotation mechanism 100 can be improved.

In some examples, referring to fig. 6, the rotation mechanism 100 may have a first groove 110 and a first through hole 120 communicating with the first groove 110. In this case, the rotating unit 220 can be easily provided to the rotating mechanism 100, and the rotating mechanism 100 and the rotating unit 220 can be more easily linked.

In some examples, the opening of the first groove 110 may be provided with a fixing block that may constrain the connection portion 221 within the first groove 110, i.e., limit the connection portion 221 within the first groove 110. In this case, the connection portion 221 can be reduced from falling off from the opening of the first groove 110, and the stability of the connection portion 221 in the rotation mechanism 100 can be improved.

In some examples, the connection 221 may mate with the first groove 110. Specifically, the maximum radial dimension of the first groove 110 may be equal to the maximum radial dimension of the connection portion 221.

In some examples, the maximum radial dimension of the first groove 110 may be greater than the maximum radial dimension of the connection 221. In this case, the connection part 221 can be movably provided to the first groove 110, so that the connection part 221 and the first groove 110 can be relatively moved. In some examples, the maximum radial dimension of the first groove 110 may be located at a middle portion of the first groove 110. In other words, the size of the opening of the first groove 110 is smaller than the radial size in the constraint space of the first groove 110.

In some examples, the connection portion 221 may be rotatably disposed in the first groove 110. In this case, when the rotating portion 220 contacts the stopper portion 230, the rotating portion 220 can relatively move with respect to the rotating mechanism 100 with the connecting portion 221 as a fulcrum.

In some examples, the first recess 110 may be disposed on a side of the rotation mechanism 100 proximate to the base 210. In this case, the connection part 221 can be directly mounted to the rotation mechanism 100 through the first groove 110, so that the process of mounting or dismounting the connection part 221 can be simplified.

In some examples, the connection 221 may be a cylinder, or an irregular shape.

In some examples, the connection 221 may be spherical. In some examples, the radial dimension of the opening of the first groove 110 may be no greater than the maximum radial dimension of the connection 221. In this case, the connection portion 221 can be reduced from falling off from the opening of the first groove 110 due to the action of gravity, and the stability of the connection portion 221 in the rotation mechanism 100 can be improved, and the matching between the connection portion 221 and the first groove 110 can be improved, and the stability of the connection portion 221 in the rotation mechanism 100 can be improved.

In some examples, the connection 221 may be coupled with the first groove 110 through an opening of the first groove 110. In some examples, the opening of the first groove 110 may have elasticity. In this case, the connection portion 221 can be provided to the first groove 110 by pressing or the like.

In some examples, the connection 221 may be of unitary construction with the lever 222. In some examples, the connection 221 may be fixedly connected with the lever 222. In this case, the stability of the rotating portion 220 can be improved.

In some examples, the connection 221 may be a separate structure from the lever 222. In this case, since the connection part 221 and the lever 222 may be in a detachable structure, the flexibility of setting the rotation part 220 can be improved.

In some examples, the lever 222 may extend through the first through hole 120. Thereby, the mounting of the lever 222 can be facilitated.

In some examples, the lever 222 may be one of a cylinder, a cube, or a prism.

In some examples, referring to fig. 3, the first through hole 120 may limit movement of the lever 222 in the preset direction D1D 2. In some examples, the preset direction D1D2 may be a rotational direction when the rotation mechanism 100 rotates about the geometric center axis L1. In this case, the movement direction and the movement amplitude of the lever 222 can be restricted based on the first through hole 120, so that the turning part 220 and the rotation mechanism 100 can be caused to move relatively in the preset direction D1D2 and can be limited within a certain range of relative movement.

In some examples, the first through hole 120 may be one of a polygonal hole, a cylindrical hole, or a circular hole.

In some examples, the first through hole 120 may be a circular arc hole. In this case, the lever 222 can be adapted to both ends of the circular arc hole extending outward, compared to the other shape of the first through hole 120 (for example, polygonal hole, circular hole, etc.), so that the rotation range of the lever 222 can be increased as much as possible with the size of the first through hole 120 being small, which is advantageous in maintaining the rigidity of the rotation mechanism 100.

In some examples, the center of the first through hole 120 may be the same as the center of rotation of the rotation mechanism 100. In some examples, the angle corresponding to the first through hole 120 may be set according to actual measurement requirements, for example, the angle corresponding to the first through hole 120 may be 5 degrees, 10 degrees, 20 degrees, 30 degrees, or the like.

In some examples, the shape of the stopper 230 may not be particularly limited. For example, it may be one of a cylinder, sphere, cube or prism.

In some examples, referring to fig. 7, the stop 230 may have a second recess 231 that mates with the lever 222. In some examples, the size of the opening of the second recess 231 may be greater than the size of the lever 222. In this case, the second groove 231 facilitates the contact between the stopper 230 and the lever 222 to be in surface contact, and thus the suitability of the lever 222 to contact the stopper 230 can be improved, and the contact can be made more stable.

In some examples, the second groove 231 may be disposed around the limiting portion 230, and the second groove 231 may be an annular groove. In this case, the fit between the second groove 231 and the lever 222 can be further improved while the mounting of the stopper 230 is facilitated, and the coupling of the second groove 231 and the lever 222 can be facilitated, so that the contact can be made more stable.

In some examples, the stop 230 may be made of a flexible material (e.g., polyvinyl alcohol, polyester, or polyimide, etc.). In this case, the stopper 230 can be made more flexible and malleable, so that adverse effects of the force generated upon contact can be reduced.

In some examples, the limit portion 230 may be a flexible structure, and the limit portion 230 and the rotation portion 220 may be in flexible contact. In this case, when the stopper portion 230 is in flexible contact with the rotating portion 220, negative effects of the acting force can be reduced, compared to the rigid contact, so that the accuracy of the rotation angle of the rotation mechanism 100 can be improved.

In some examples, the rotation mechanism 100 may also include a drive device. In some examples, the drive device may drive the rotation mechanism 100 to rotate about the shaft axis. Thereby, the rotation mechanism 100 can rotate.

In some examples, referring to fig. 3, the geometric center of the rotation mechanism 100 may have a second through hole 130, and the driving device may be disposed at the second through hole 130. In this case, the rotation mechanism 100 can be coupled to the driving device based on the second through hole 130, and when the driving device rotates, the rotation mechanism 100 can be rotated following the driving device.

In some examples, the rotation angle of the rotation mechanism 100 may be controlled based on the driving device. In some examples, the rotation mechanism 100 may be controlled to rotate a preset angle based on the driving device. In this case, the rotation angle of the rotation mechanism 100 can be precisely controlled according to the actual production demand, so that the measurement demand can be satisfied well.

In some examples, the drive device may be a servo motor. In some examples, the rotation mechanism 100 may be rotated using servo motor operation. In some examples, the operating speed of the servo motor may be controlled based on actual production requirements. Thereby, the rotation of the rotation mechanism 100 can be controlled based on the demand.

Fig. 8 is a schematic diagram showing another structure of the rotary mechanism 100 according to the example of the present utility model. Fig. 9 is a sectional view showing a part of the internal structure of the third groove 140 in the stopper 200 according to the example of the present utility model.

In some examples, referring to fig. 8, the rotation mechanism 100 may have a third groove 140 disposed at a side. In some examples, the rotation part 220 may be rotatably disposed at the third groove 140. In this case, since the number of parts to be fitted can be reduced, the complexity of the structure can be further reduced. In addition, the convenience of attaching or detaching the rotating portion 220 to or from the rotating mechanism 100 can be improved.

In some examples, the rotation mechanism 100 may have a plurality of third grooves 140. In this case, the corresponding third groove 140 can be selected to be combined with the rotating part 220 according to actual production requirements.

In some examples, referring to fig. 9, the third groove 140 may have a fourth groove 141 and a fifth groove 142. The fourth groove 141 and the fifth groove 142 may be disposed at upper and lower ends of the third groove 140 opposite to each other.

In some examples, a rotation shaft 240 may be disposed between the fourth groove 141 and the fifth groove 142, and both ends of the rotation shaft 240 may be connected with the fourth groove 141 and the fifth groove 142, respectively. In some examples, the shaft 240 may be cylindrical. In this case, the rotation of the rotating portion 220 can be facilitated.

In some examples, the rotating part 220 may be rotatably disposed in the third groove 140 by the rotation shaft 240. Specifically, in some examples, an end of the rotating part 220 near the third groove 140 may have a sixth groove 223. In some examples, the shape of the sixth groove 223 may match the shape of the rotation shaft 240, for example, the sixth groove 223 may have an arc surface corresponding to an arc surface of the rotation shaft 240. In this case, the rotating part 220 can be rotatably provided to the third groove 140 by the engagement of the sixth groove 223 with the rotation shaft 240.

In some examples, the connection of the shaft 240 with the fourth groove 141 and the fifth groove 142 may be a fixed connection. In some examples, the turning part 220 may rotate in an axial direction of the rotation shaft 240.

In some examples, the shaft 240 may be disposed through the rotation mechanism 100 in a manner that extends through the rotation mechanism 100. In some examples, referring to fig. 5, the rotating part 220 may have a third through hole 224 matched with the rotation shaft 240, and the rotating part 220 may be rotatably provided to the rotation mechanism 100 through the third through hole 224. In this case as well, the aforementioned advantageous effect of expanding the rotation range of the rotation mechanism 100 can be achieved.

While the utility model has been described in detail in connection with the drawings and examples thereof, it should be understood that the foregoing description is not intended to limit the utility model in any way. Modifications and variations of the utility model may be made as desired by those skilled in the art without departing from the true spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model.

Claims (10)

1. A stop device of rotary mechanism, is the stop device of restriction rotary mechanism's rotation scope, its characterized in that, stop device includes:

a base of the rotating mechanism, a rotating part linked with the rotating mechanism and a limiting part are arranged,

the rotating part is movably connected with the rotating mechanism,

the limiting part is arranged on the base and is configured to contact with the rotating part when the rotating mechanism rotates by a preset angle.

2. The spacing device of claim 1, wherein:

the rotation mechanism has a first groove and a first through hole communicating with the first groove.

3. A spacing device as claimed in claim 2, wherein:

the rotating part comprises a connecting part matched with the first groove and rotatably arranged in the first groove, and a deflector rod connected with the connecting part and penetrating through the first through hole, wherein the first through hole limits the deflector rod to move in a preset direction.

4. A spacing device as claimed in claim 2 or claim 3 wherein:

the first groove is formed in one side, close to the base, of the rotating mechanism.

5. A spacing device as claimed in claim 3, wherein:

the connecting portion is spherical, and the radial dimension of the opening of the first groove is not greater than the maximum radial dimension of the connecting portion.

6. A spacing device as claimed in claim 3, wherein:

the limiting part is provided with a second groove matched with the deflector rod.

7. The spacing device of claim 1, wherein:

the geometric center axis of the rotating portion is orthogonal to the geometric center axis of the rotating mechanism.

8. A spacing device as claimed in claim 3, wherein:

the first through hole is an arc hole.

9. The spacing device of claim 1, wherein:

the limiting part is of a flexible structure, and the limiting part is in flexible contact with the rotating part.

10. The spacing device of claim 1, wherein:

the rotating mechanism is provided with a third groove arranged on the side face, and the rotating part is rotatably arranged in the third groove through a rotating shaft.

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