CN111692482A - Mechanical limiting mechanism of rotary table with limited rotation angle range reaching +/-360 degrees - Google Patents
Mechanical limiting mechanism of rotary table with limited rotation angle range reaching +/-360 degrees Download PDFInfo
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- CN111692482A CN111692482A CN202010570382.7A CN202010570382A CN111692482A CN 111692482 A CN111692482 A CN 111692482A CN 202010570382 A CN202010570382 A CN 202010570382A CN 111692482 A CN111692482 A CN 111692482A
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- shifting block
- shaped shifting
- tension spring
- rotation angle
- limiting mechanism
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
- F16M11/10—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
Abstract
The invention relates to the technical field of mechanical transmission, and discloses a mechanical limiting mechanism of a rotary table with a limited rotation angle range of +/-360 degrees. The mechanism consists of a shifting fork, a V-shaped shifting block, a tension spring, a rotating shaft, a seat body, an adjusting screw, a pressure spring, a positioning steel ball and other components. The V-shaped shifting block is arranged on the seat body through a rotating shaft, the V-shaped shifting block is connected with the seat body through a tension spring, the upper end of the tension spring is fixed on the V-shaped shifting block, and the lower end of the tension spring is fixed on the seat body; the V-shaped shifting block is provided with a mounting hole for mounting a positioning steel ball, a pressure spring and an adjusting screw, and the positive pressure of the positioning steel ball can be changed by adjusting the deformation of the pressure spring; the left side and the right side of the V-shaped shifting block are respectively provided with a left expansion groove and a right expansion groove which are used for increasing the mechanical limiting angle range; the end of the rotating shaft is reserved with a power-assisted thread structure, so that the rotating shaft is convenient to disassemble. The mechanical limiting mechanism of the rotary table has the advantages of simple structure, flexible and reliable use, convenient observation and debugging, strong environmental adaptability, low cost and strong universality.
Description
Technical Field
The invention relates to the technical field of mechanical transmission, in particular to a mechanical limiting mechanism of a rotary table with a limited rotation angle range of +/-360 degrees.
Background
In the industries of communication, radar and the like, the turntable is required to bear equipment such as an antenna feeder, a front end and the like to rotate within a limit rotation angle range of more than 360 degrees, and the searching and tracking of electromagnetic signals in a full airspace are realized.
Due to the limitation of technical level, radio frequency, electricity, light and other signals between the antenna feeder, the front end and other equipment cannot realize full-band and low-difference-loss continuous transmission, the rotary table can only adopt a rotary table structure which can rotate in a reciprocating manner within a certain limit rotation angle range, and the limit rotation angle range of the rotary table is usually required to be not less than +/-270 degrees and even reach +/-360 degrees in consideration of the actual use and continuous and quick tracking requirements of the rotary table. In order to avoid the damage of cables, optical cables and liquid cooling pipelines between other equipment and equipment such as an antenna feeder and a front end caused by the fact that the reciprocating type rotary table exceeds the limit rotation angle range in the rotating process, a mechanical limiting mechanism needs to be arranged at the limit rotation angle position of the rotary table, so that the rotary table stops rotating at the limit rotation angle position, and a reliable protection effect is achieved on a system.
The mechanical limiting mechanism of the rotary table with the limit rotation angle range not lower than +/-270 degrees is mostly developed according to the application requirements and the layout of the rotary table, and the technical solutions of the mechanical limiting mechanism have the characteristics and the limitations of the mechanical limiting mechanism.
In the turntable limiting scheme in the prior art, although the mechanical limiting requirement of the turntable with the limiting rotation angle range larger than 360 degrees can be met, the mechanical limiting rotation angle range is limited by the specific application requirement, the mechanical limiting rotation angle range is difficult to reach or exceed +/-360 degrees, and the mechanical limiting structures in partial schemes are too complex and difficult to debug; poor resistance to harsh environments; the occupied turntable space is large; the use cost is higher, and the practical use is greatly limited.
Therefore, a low-cost mechanical rotary table limiting mechanism with a simple structure, strong environmental adaptability and high reliability and a limit rotation angle range of +/-360 degrees is required for a reciprocating rotary table frequently adopted in the industries of communication, radar and the like, and the connecting cable, the optical cable and the liquid cooling pipeline are reliably protected at the limit rotation angle position of the rotary table, so that the system safety is ensured.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problems, the mechanical limiting mechanism of the reciprocating type rotary table with the limiting rotation angle range reaching +/-360 degrees is provided, a safe and reliable mechanical limiting function is provided for the rotary table at the limiting rotation angle position of the rotary table, and the rotary table and the electronic equipment connecting cables, optical cables and the like on the rotary table are protected.
The technical scheme adopted by the invention is as follows: a mechanical limiting mechanism of a rotary table with a limited rotation angle range reaching +/-360 degrees comprises: the V-shaped shifting block is arranged on the base body, an elastic piece is connected between the V-shaped shifting block and the base body, a mounting hole is formed in the V-shaped shifting block, a positioning steel ball, a pressure spring and an adjusting screw are arranged in the mounting hole, and expansion grooves are formed in two sides of the V-shaped shifting block respectively.
Through setting up the elastic component in order to guarantee that V-arrangement shifting block when left and right limiting position, no exogenic action can not rotate by oneself, and the holding state is stable.
The state of the V-shaped shifting block at the original position is kept stable by arranging the built-in positioning steel ball and the pressure spring.
The expansion grooves are respectively arranged on the two sides of the V-shaped shifting block, so that the mechanical limiting angle range is improved.
Furthermore, the V-shaped shifting block is arranged on the base body through a rotating shaft, and the tail end of the rotating shaft is provided with threads.
When the rotary shaft is disassembled, the rotary shaft is ejected out of the base body through the threads at the tail end of the rotary shaft, and the separation of the rotary shaft and the base body is realized.
Furthermore, a positioning groove and a limiting surface are arranged on the seat body.
When the V-shaped shifting block is positioned at the original position, the V-shaped shifting block is stabilized in the positioning groove on the seat body under the action of the positioning steel ball. When the V-shaped shifting block is located at the limit position, the V-shaped shifting block can ensure the stable state of the V-shaped shifting block at the limit position under the action of the elastic piece.
Furthermore, the elastic part adopts a tension spring, one end of the tension spring is fixed on the V-shaped shifting block, and the other end of the tension spring is fixed on the seat body.
Furthermore, a first bolt for fixing the tension spring is arranged on the symmetrical line of the V-shaped shifting block, and a second bolt for fixing the tension spring is arranged on the symmetrical line of the seat body.
Further, when the V-shaped shifting block is located at the original position, the length of the tension spring is L1, and when the V-shaped shifting block is located at the limit position, the length of the tension spring is L2; wherein L1> L2.
The first bolt and the second bolt ensure that the tension spring is better connected and fixed on the V-shaped shifting block and the seat body, and the first bolt and the second bolt are arranged on a symmetrical line of the V-shaped shifting block and the seat body, so that the tension force of the tension spring on the V-shaped shifting block passes through the rotation center of the V-shaped shifting block when in an original position, the rotation torque borne by the V-shaped shifting block is zero, and the V-shaped shifting block cannot rotate; once the V-shaped shifting block deviates from the original position, the tension force generated by the tension spring does not pass through the rotation center of the V-shaped shifting block any more, the generated torque enables the V-shaped shifting block to rotate, and the V-shaped shifting block is kept in a stable state when in the limit position.
Furthermore, a shifting fork is also arranged on the V-shaped shifting block, the shifting fork shifts the V-shaped shifting block to rotate, and mechanical limit is realized through the shifting fork, the V-shaped shifting block and the seat body when the shifting fork is in the extreme position,
compared with the prior art, the beneficial effects of adopting the technical scheme are as follows:
(1) after the V-shaped shifting block deviates from the balance position, under the action of the tension spring, the V-shaped shifting block rotates to the corresponding limit position in a single direction, and under the action of the tension spring, the state stability under the conditions of impact and vibration is ensured;
(2) when the rotary table is at a 0-degree position (namely an original position), the V-shaped shifting block is at a balance position through the positioning steel ball elastic force adjustable position retaining structure, so that the mechanical limit limiting angle is prevented from being changed due to collision with the shifting fork or position change of the shifting fork under the conditions of impact and vibration;
(3) the V-shaped shifting block double-side inner expansion groove structure improves the limit rotation angle range, actually reaches or slightly exceeds +/-360 degrees, reduces the structural redundancy and reduces the weight;
(4) the disassembly assisting thread structure is convenient for disassembly operation of the rotating shaft during maintenance, and the maintainability of the product is improved;
(5) the mechanical limiting mechanism has the advantages of simple structure, high maturity of manufacturing and assembling processes, flexible and reliable use, convenient observation and debugging, strong environmental adaptability, low cost and strong universality.
Drawings
FIG. 1 is a schematic diagram of the main structure of the device of the present invention.
Fig. 2 is a front view of the device of the present invention.
Fig. 3 is a side view of the device of the present invention.
Fig. 4 is a schematic view of a stable structure of a V-shaped shifting block tension spring.
Fig. 5 is a schematic diagram of a positioning steel ball position holding structure of an elastic force adjustable structure.
Fig. 6 is a schematic view of a V-shaped shifting block structure.
Fig. 7 is a schematic view of a turntable structure.
Fig. 8 is a front view and a top view of the V-shaped paddle.
Fig. 9 is a schematic view of the seat structure.
Fig. 10 is a schematic view of the structure of the rotating shaft.
Fig. 11 is a schematic view of the mechanical limiting mechanism in a 0 ° state.
Fig. 12 is a schematic view of the mechanical limiting mechanism in a +360 ° state.
Fig. 13 is a schematic view of the mechanical stop mechanism at-360.
Reference numerals: 1-turntable, 2-mechanical turntable limiting mechanism with a limited rotation angle range of +/-360 degrees, 3-base, 201-shifting fork, 202-V-shaped shifting block, 203-base body, 204-adjusting screw, 205-pressure spring, 206-positioning steel ball, 207-rotating shaft, 208-tension spring, 209-first bolt, 210-second bolt, 2021-left expansion groove, 2022-right expansion groove, 2031-positioning groove, 2071-power-assisted thread, F, G, H, J, K, M, P-V-shaped shifting block surface and Q, T-limiting surface.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1, fig. 2 and fig. 3, the present embodiment provides a mechanical turntable limiting mechanism with a limited rotation angle range of ± 360 °, and the mechanism is composed of a shifting fork 201, a V-shaped shifting block 202, a tension spring 208, a rotating shaft 207, a seat body 203, an adjusting screw 204, a pressure spring 205, a positioning steel ball 206, a first bolt 209, a second bolt 210, and the like.
As shown in fig. 1, fig. 2 or fig. 3, the V-shaped shifting block 202 is installed on the seat body 203 through a rotating shaft, the V-shaped shifting block 202 and the seat body 203 are connected by a tension spring 208, the upper end of the tension spring 208 is fixed on the V-shaped shifting block 202, and the lower end is fixed on the seat body 203, so as to form a V-shaped shifting block tension spring stabilizing structure.
As shown in fig. 4, when the V-shaped shifting block 202 is at the original position, the length of the tension spring 208 is L1, when the turntable is at the left and right limit positions, the length of the tension spring 208 is L2, and L1> L2, when the V-shaped shifting block is at the left and right limit positions, the V-shaped shifting block cannot rotate by itself without external force, and the holding state can be stable.
As shown in fig. 5, a mounting hole is formed in the V-shaped shifting block 202, and a positioning steel ball 206, a pressure spring 205 and an adjusting screw 204 are mounted in the mounting hole, so as to form a positioning steel ball elastic force adjustable position maintaining structure, and the positive pressure of the positioning steel ball 206 can be changed by adjusting the deformation of the pressure spring 205.
As shown in fig. 6, the left and right sides of the V-shaped shifting block 202 are respectively provided with a left expanding groove 2021 and a right expanding groove 2022 for increasing the mechanical limit angle range.
As shown in fig. 7, the mechanical limiting mechanism of the turntable provided in this embodiment is installed outside the turntable, and a shifting fork 201 on the mechanical limiting mechanism is installed on a turntable capable of rotating circumferentially and rotates together with the turntable; the mechanical limiting mechanism main body is installed on the turntable base and fixed.
As shown in fig. 8, the relative sizes of the V-shaped shifting block 202 and the shifting fork 201 should satisfy the following requirements:
setting:
a) the mounting radius of the center of the shifting fork 201 on the turntable is R0；
b) In the rotating process of the turntable, the outer enveloping radius of the expansion grooves on the two sides of the V-shaped shifting block 202 is R, and the inner enveloping radius is R.
Then: r0＝(R+r)/2。
Setting:
c) the width of the shifting fork 201 is M, and the depth is N;
d) the depth of the expansion grooves on the two sides of the V-shaped shifting block 202 deviates from the symmetrical center by a distance W.
Then: w is more than or equal to M/2; n < (R-R).
Example 2
On the basis of embodiment 1, in this embodiment, as shown in fig. 9, a positioning groove 2031 is disposed in the middle of the upper portion of the seat body 203, and a protruding limiting surface Q, T colliding with the V-shaped shifting block 202 is disposed at the bottom of the seat body 203, when the V-shaped shifting block 202 is located at the original position, the V-shaped shifting block 202 is stabilized in the positioning groove 2031 on the seat body 203 under the action of the positioning steel ball 206, when the V-shaped shifting block 202 is located at the left and right limiting positions, the H-plane and the P-plane of the V-shaped shifting block 202 will collide with the limiting surface Q and the limiting surface T on the seat body 203 respectively, and under the action of the tension spring 208, the V-shaped shifting block 202 will not rotate at the limiting position.
Example 3
On the basis of the embodiment 1 or 2, in this embodiment, as shown in fig. 10, an assisting screw 2071 is formed at the end of the rotating shaft 207. During disassembly, the spindle 207 can be ejected out of the base 203 through the assisting screw 2071 at the end of the spindle 207, so that the spindle 207 and the base 203 can be separated.
Example 4
On the basis of the embodiment 1, 2 or 3, in this embodiment, as shown in fig. 6 and 9, the V-shaped shifting block 202 and the seat body 203 are respectively provided with a first bolt 209 and a second bolt 210 for fixedly mounting the tension spring 208, the upper end of the tension spring 208 is fixed on the first bolt 209, and the lower end is fixed on the second bolt 210; the first bolt 209 and the second bolt 210 are arranged on the symmetry line of the V-shaped shifting block 202 and the seat body 203, so that when the original position (0 °), the moment of the V-shaped shifting block acted by the tension spring 208 is zero, and the positioning steel ball 206 is clamped in the positioning groove 2031 under the action of the pressure spring 205, so as to keep the position stable; once the V-shaped shifting block 202 deviates from the original position, the tension generated by the tension spring 208 rotates the V-shaped shifting block 202 and keeps the state stable at the extreme position.
The mechanical limit of the invention is implemented as follows:
defining: the rotation of the turntable 1 in the counterclockwise direction is positive rotation, and the rotation in the clockwise direction is reverse rotation.
When the turntable is at the 0 ° position, the V-shaped shifting block 202 in the mechanical limiting mechanism 2 is stabilized in the positioning groove 2031 on the base 203 under the action of the positioning steel ball 206, and the V-shaped shifting block 202 is at the equilibrium position, as shown in fig. 11.
The implementation process of implementing left limit by forward rotation is as follows:
the turntable 1 starts to rotate forwards from a 0-degree position, the shifting fork 201 collides with the J surface of the V-shaped shifting block 202, so that the positioning steel ball 206 arranged on the V-shaped shifting block 202 is separated from the positioning groove 2031 on the seat body 203, under the action of the tension spring 208, the V-shaped shifting block 202 rotates clockwise around the rotation center thereof, so that the P surface of the V-shaped shifting block 202 is contacted with the T surface of the seat body 203, the V-shaped shifting block 202 stops rotating, and under the action of the tension spring 208, the P surface of the V-shaped shifting block 202 is always contacted with the T surface of the seat body 203; the turntable 1 continues to rotate forward, the shifting fork 201 enters the left expansion groove 2021, when the forward rotation angle reaches +360 degrees, the shifting fork 201 collides with the surface F of the V-shaped shifting block 202, the turntable 1 stops rotating at the left limit position, and the state of the mechanical limiting mechanism is shown in fig. 12.
In the left limit state, when the turntable 1 rotates reversely from the +360 ° position to approximately 0 °, the shifting fork 201 collides with the G surface of the V-shaped shifting block 202, overcomes the tension of the tension spring 208, and causes the V-shaped shifting block 202 to rotate around the rotation center thereof in the counterclockwise direction, when the positioning steel ball 206 on the V-shaped shifting block 202 slides into the positioning groove 2031 on the seat body 203, the V-shaped shifting block 202 returns to the 0 ° position, and the mechanical limit mechanism state is as shown in fig. 11.
The implementation process of implementing right limit by reverse rotation is as follows:
the turntable 1 starts to reversely rotate from the position of 0 degree, the shifting fork 201 collides with the G surface of the V-shaped shifting block 202, so that the positioning steel ball 206 arranged on the V-shaped shifting block 202 is separated from the positioning groove 2031 on the seat body, under the action of the tension spring 208, the V-shaped shifting block 202 rotates around the rotation center thereof in the anticlockwise direction, so that the H surface of the V-shaped shifting block 202 is contacted with the Q surface of the seat body 203, the V-shaped shifting block 202 stops rotating, and under the action of the tension spring 208, the H surface of the V-shaped shifting block 202 is always contacted with the Q surface of the seat body 203; the turntable 1 continues to rotate reversely, the shifting fork 201 enters the right expansion groove 2022, when the reverse rotation angle reaches-360 degrees, the turntable 1 stops rotating at the right limit position after the shifting fork 201 collides with the K surface of the V-shaped shifting block 202, and the state of the mechanical limiting mechanism is shown in fig. 13.
In the right limit state, when the turntable 1 rotates forward from the-360 ° position to approximately 0 °, the shifting fork 201 collides with the J-plane of the V-shaped shifting block 202, overcomes the tension of the tension spring 208, and causes the V-shaped shifting block 202 to rotate clockwise around the rotation center thereof, when the positioning steel ball 206 on the V-shaped shifting block 202 slides into the positioning groove 2031 on the base, the V-shaped shifting block 202 returns to the 0 ° position, and the mechanical limit mechanism state is as shown in fig. 11.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed. Those skilled in the art to which the invention pertains will appreciate that insubstantial changes or modifications can be made without departing from the spirit of the invention as defined by the appended claims.
Claims (8)
1. A mechanical limiting mechanism of a rotary table with a limited rotation angle range reaching +/-360 degrees is characterized by comprising: the V-shaped shifting block is arranged on the base body, an elastic piece is connected between the V-shaped shifting block and the base body, a mounting hole is formed in the V-shaped shifting block, a positioning steel ball, a pressure spring and an adjusting screw are arranged in the mounting hole, and expansion grooves are formed in two sides of the V-shaped shifting block respectively.
2. The mechanical limiting mechanism for the turntable with the limited rotation angle of +/-360 degrees as claimed in claim 1, wherein the V-shaped shifting block is mounted on the base through a rotating shaft, and the tail end of the rotating shaft is provided with a thread.
3. A mechanical limiting mechanism for a turntable with a limited rotation angle of ± 360 ° as claimed in claim 1, wherein said base has a positioning groove and a limiting surface.
4. The mechanical limiting mechanism for the turntable with the limited rotation angle of +/-360 degrees as claimed in claim 1, wherein the elastic member is a tension spring.
5. The mechanical limiting mechanism for the turntable with the limited rotation angle of +/-360 degrees as claimed in claim 4, wherein one end of the tension spring is fixed on the V-shaped shifting block, and the other end of the tension spring is fixed on the seat body.
6. The mechanical limiting mechanism for the turntable with the limited rotation angle of +/-360 degrees as claimed in claim 5, wherein a first bolt for fixing the tension spring is arranged on a symmetry line of the V-shaped shifting block, and a second bolt for fixing the tension spring is arranged on a symmetry line of the seat body.
7. The mechanical limiting mechanism for the turntable with the limited rotation angle of +/-360 degrees of claim 5, wherein the length of the tension spring is L1 when the V-shaped shifting block is located at the original position, and the length of the tension spring is L2 when the V-shaped shifting block is located at the limit position; wherein L1> L2.
8. The mechanical limiting mechanism for the turntable with the limited rotation angle of +/-360 degrees as claimed in claim 1, wherein a shifting fork is further arranged on the V-shaped shifting block, and the shifting fork shifts the V-shaped shifting block to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010570382.7A CN111692482A (en) | 2020-06-19 | 2020-06-19 | Mechanical limiting mechanism of rotary table with limited rotation angle range reaching +/-360 degrees |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010570382.7A CN111692482A (en) | 2020-06-19 | 2020-06-19 | Mechanical limiting mechanism of rotary table with limited rotation angle range reaching +/-360 degrees |
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| Publication Number | Publication Date |
|---|---|
| CN111692482A true CN111692482A (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010570382.7A Pending CN111692482A (en) | 2020-06-19 | 2020-06-19 | Mechanical limiting mechanism of rotary table with limited rotation angle range reaching +/-360 degrees |
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| CN (1) | CN111692482A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045937A (en) * | 2022-06-27 | 2022-09-13 | 南京信息工程大学 | Mechanical limiting mechanism and method for +/-360-degree rotary table |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045937A (en) * | 2022-06-27 | 2022-09-13 | 南京信息工程大学 | Mechanical limiting mechanism and method for +/-360-degree rotary table |
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Application publication date: 20200922 |