CN109990024B

CN109990024B - Limiting mechanism with angle larger than plus or minus 180 degrees

Info

Publication number: CN109990024B
Application number: CN201910372780.5A
Authority: CN
Inventors: 唐术锋; 于越
Original assignee: Inner Mongolia University of Technology
Current assignee: Inner Mongolia University of Technology
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2020-07-10
Anticipated expiration: 2039-05-06
Also published as: CN109990024A

Abstract

The invention discloses a limiting mechanism with the angle of more than plus or minus 180 degrees, which relates to the technical field of turntable limiting and comprises a base, a sliding turntable, a rotating shaft, a limiting turntable, two micro switches and two springback resetting devices, wherein the rotating shaft sequentially penetrates through the base and the sliding turntable and is rotatably connected with the base; set firmly stopper an on the spacing carousel, set firmly stopper b on the slip carousel, stopper an and stopper b adaptation, stopper b and two micro-gap switch's contact adaptation, resilience resetting means and stopper b adaptation, stopper an and micro-gap switch's contact contactless. The mechanism is simple in structure, reasonable in layout and reliable in limiting, the limiting angle of the limiting mechanism can be adjusted by replacing the limiting blocks a and b at different angles, and the requirements of various working conditions are met.

Description

Limiting mechanism with angle larger than plus or minus 180 degrees

Technical Field

The invention relates to the technical field of turntable limiting, in particular to a limiting mechanism with the angle of more than plus or minus 180 degrees.

Background

In some equipment requiring rotary operation, a cable, an oil pipe and the like are connected to a rotary table, and the cable, the oil pipe and the like are twisted off when the rotary table rotates excessively in one direction, so that a limiting mechanism is usually additionally arranged on the rotary table to limit the rotary angle of the rotary table so as to prevent the rotary table from rotating excessively. In the prior art, a limiting mechanism of a turntable usually adopts the contact of a shifting fork and a limiting block to realize the physical limiting of the turntable, but the mechanism can only be used for limiting within the limiting range of less than plus or minus 180 degrees, and in practical application, the turntable is often required to rotate within the range of more than plus or minus 180 degrees, which cannot be realized by the mechanism. When the range larger than plus or minus 180 degrees needs to be limited, a plurality of limit switches are installed conventionally, and the limitation is realized by controlling the response logic of the limit switches, but the control of the limit mode is complex, the reliability is poor, and once the limit fails, the turntable is directly caused to rotate excessively, so that the equipment fault is caused.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a limiting mechanism with the angle larger than plus or minus 180 degrees, the mechanism has simple structure, reasonable layout and reliable limiting, and the limiting angle of the mechanism can be adjusted by changing the angle of a limiting block, thereby meeting the requirements of various working conditions.

The purpose of the invention is realized by the following technical scheme:

a limiting mechanism with the angle larger than plus or minus 180 degrees comprises a base, a sliding turntable, a rotating shaft, a limiting turntable, two micro switches and two rebound resetting devices, wherein the rotating shaft sequentially penetrates through the base and the sliding turntable, the rotating shaft is connected with the base and the sliding turntable through bearings, the limiting turntable is fixedly sleeved at one end, close to the sliding turntable, of the rotating shaft, and the two micro switches and the two rebound resetting devices are fixedly connected with the base;

a symmetry axis is formed along the radial direction of the rotating shaft, the two microswitches are symmetrically arranged along the symmetry axis, and the two rebound resetting devices are symmetrically arranged along the symmetry axis;

the fixed stopper a that is provided with on the spacing carousel, the fixed stopper b that is provided with on the slip carousel, the setting that the one end of stopper a and the one end of stopper b can contact, the setting that the other end of stopper a and the other end of stopper b can contact, stopper b keeps away from one side of pivot is provided with the bellying, the bellying with two the setting that all can contact of micro-gap switch's contact, resilience resetting means with the setting that the one end of stopper b can contact, the distance of stopper a's edge to the pivot axle center is less than micro-gap switch's contact arrives the distance in pivot axle center.

Furthermore, a connecting line between the contacts of the two micro switches is intersected with the central shaft of the rotating shaft.

Further, resilience resetting means includes spring and resilience piece, be provided with annular spout on the base, resilience piece slidable set up in the spout, the spring set up in the spout, the one end of spring with base fixed connection, its other end with the one end fixed connection of resilience piece, the other end of resilience piece with stopper b looks adaptation.

Further, still including the closing cap that kick-backs, the closing cap that kick-backs set up in the notch position of spout, the closing cap that kick-backs with the base passes through the screwed connection, the spring is kept away from the one end of resilience piece with the closing cap fixed connection that kick-backs.

Further, the base still includes the ring flange, the ring flange cover is located outside the pivot, the ring flange with the base passes through the screw connection, the spout set up in on the ring flange.

Furthermore, a blocking device is fixedly arranged on the base and used for limiting the limiting block b to follow the rotating shaft to rotate.

Further, the separation device includes mounting box, stopper c and spring b, the mounting box with base fixed connection, stopper c slidable set up in the mounting box, spring b's one end and mounting box fixed connection, its other end with stopper c fixed connection, stopper c keeps away from spring b's one end with stopper b can contact the setting.

Furthermore, the limiting block a and the limiting block b are both fan-shaped structures.

Furthermore, the limiting block a is detachably connected with the limiting rotary table, and the limiting block b is detachably connected with the sliding rotary table.

The invention has the beneficial effects that:

1. the limiting mechanism is limited in a mode of combining the microswitch and the rebound resetting device, and is simple in structure and reasonable in layout. When micro-gap switch became invalid, resilience resetting means played further hard spacing effect, can effectively avoid the equipment damage that the revolving stage excessively rotated and caused. The micro-gap switch is used as a main limiting mechanism, the rebound reset device is used for limiting in actual use, impact on the micro-gap switch is less, and the micro-gap switch is long in service life. This stop gear is through combining together the spacing mode of controlling with physics, compares in prior art, and is simpler in control, and spacing reliability is stronger.

2. The two micro switches are arranged in 180 degrees by taking the center of the rotating shaft as an angular point, so that the limiting range of the limiting mechanism is larger than plus or minus 180 degrees. Stopper a and stopper b set up to be fan-shaped structure, and are connected with spacing carousel and slip carousel detachable respectively, change through changing its angle size and can realize spacing angle's adjustment, and it is very convenient to operate.

3. Rebound resetting means comprises rebound block, spring and resilience closing cap, and processing spout plays the guide effect to the rebound block on the base, and the rebound closing cap can effectively prevent rebound block and spring from collapsing out, and this makes this rebound resetting means's simple structure, convenient to use, and the operation is stable, and safe and reliable.

4. The flange plate is arranged, the assembly of the limiting mechanism can be completed through the flange plate only by machining the mounting hole on the base, and the limiting mechanism is simple in structure, convenient to install, suitable for various types of rotary tables and wide in application range. Meanwhile, once the sliding groove or the rebound resetting device is damaged, the whole flange plate can be integrally replaced, and the flange plate is easier to repair.

5. Set up the separation device, can effectively avoid when practical application, stopper b and slip carousel rotate along with the pivot under the effect of frictional force together, and directly trigger to micro-gap switch and cause the spacing condition of mistake of equipment to take place.

Drawings

FIG. 1 is a schematic structural view of a positive and negative 180 degree stop mechanism of the present invention;

fig. 2 is a schematic sectional view of a limiting mechanism of more than plus or minus 180 degrees according to the present invention.

Detailed Description

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.

As shown in fig. 1 and 2, the limiting mechanism with a angle greater than plus or minus 180 degrees comprises a base 1, a sliding turntable 5, a rotating shaft 9, a limiting turntable 10, two microswitches 4 and two rebound resetting devices 2. The rotating shaft 9 sequentially penetrates through the base 1 and the sliding turntable 5, and the rotating shaft 9 is connected with the base 1 and the sliding turntable 5 through bearings, so that the rotating shaft 9 can freely rotate in the base 1. The limiting rotary table 10 is fixedly sleeved at one end of the rotating shaft 9 close to the sliding rotary table 5, so that the limiting rotary table rotates along with the rotation of the rotating shaft 9.

Above-mentioned two micro-gap switches 4 and two resilience resetting means 2 all with base 1 fixed connection, two micro-gap switches 4 and two resilience resetting means 2 are the symmetry setting respectively, and two micro-gap switches 4's symmetry axis and two resilience resetting means's symmetry axis coincidence. The axis of symmetry is located in the radial direction of the rotary shaft 9, intersecting the central axis of the rotary shaft 9.

A limit block a11 is fixedly arranged on the limit turntable 10, and a limit block b12 is fixedly arranged on the sliding turntable 5. One end of the limit block a11 and one end of the limit block b12 are arranged in a contactable manner, the other end of the limit block a11 and the other end of the limit block b12 are arranged in a contactable manner, one side of the limit block b12, which is far away from the rotating shaft 9, is provided with a protruding part, the protruding part and contacts of the two micro switches 4 are arranged in a contactable manner, and the rebound resetting device 2 and one end of the limit block b12 are arranged in a contactable manner. The distance from the edge of the limit block a11 to the axis of the rotating shaft 9 is less than the distance from the contact of the micro switch 4 to the axis of the rotating shaft 9, so that the limit block a11 cannot contact with the contact of the micro switch 4 when rotating along with the limit turntable 10.

In practice, the base 1 may be mounted on a turntable or the turntable may be directly provided as the base 1. As shown in fig. 1, for example, when the rotating shaft 9 rotates clockwise, the limiting block a11 is driven to rotate by the limiting turntable 10, because the distance from the edge of the limiting block a11 to the axis of the rotating shaft 9 is less than the distance from the contact of the micro switch 4 to the axis of the rotating shaft 9, the micro switch 4 on the right side is not triggered in the rotating process, and after the micro switch 4 crosses over the position of the micro switch 4, as the micro switch continues to rotate, the end on the left side contacts with the right end of the limiting block b12, the limiting block b12 and the sliding turntable 5 are driven to rotate together, and when the limiting block b12 rotates to the micro switch 4 on the left side, the contact is contacted with the contact thereof, the micro switch 4 is triggered. In the process of triggering the microswitch 4, the left end of the limit block b12 contacts with the rebound reset device 2 on the left side of the figure. When the rotating shaft 9 rotates counterclockwise, under the action of the rebound resetting device 2, the limiting block b12 and the sliding turntable 5 rotate together for an angle, so that the limiting block b12 is separated from the microswitch 4 on the left side and is separated from the triggering state. Along with the continuous rotation of stopper a11 following pivot 9, it crosses right side and left micro-gap switch 4 back respectively, and the right-hand member of stopper a11 contacts with the left end of stopper b12, drives stopper b12 and sliding turntable 5 anticlockwise rotation together, when rotating micro-gap switch 4 to the right side, triggers this micro-gap switch 4 and realizes spacingly to contact with resilience resetting means 2 on right side.

The limiting mechanism is limited in a mode of combining the microswitch 4 and the rebound resetting device 2, and is simple in structure and reasonable in layout. When micro-gap switch 4 became invalid, resilience resetting means 2 played further hard spacing effect, can effectively avoid the equipment damage that the revolving stage excessively rotated and caused. The microswitch 4 is used as a main limiting mechanism, the rebound reset device 2 is used for limiting in actual use, impact on the microswitch is less, and the service life of the microswitch is longer. This stop gear is through combining together the spacing mode of controlling with physics, compares in prior art, and is simpler in control, and spacing reliability is stronger.

In specific implementation, a connecting line between contacts of the two micro switches 4 is intersected with a central shaft of the rotating shaft 9, that is, the two micro switches 4 are arranged in an angle of 180 degrees by taking the center of the rotating shaft 9 as an angular point, so that the limit range of the limit mechanism can be larger than plus or minus 180 degrees.

The rebound-return device 2 comprises a spring 21 and a rebound block 22. The base 1 is provided with an annular sliding groove 24, the rebound block 22 is slidably arranged in the sliding groove 24, and the sliding groove 24 plays a role in limiting and guiding the rebound block 22. Spring 21 sets up in spout 24, and spring 21's one end and base 1 fixed connection, its other end and the one end fixed connection of resilience piece 22, the other end and the stopper b12 looks adaptation of resilience piece 22. Concretely, resilience resetting means still includes resilience closing cap 23, and resilience closing cap 23 sets up in the notch position of spout 24, and resilience closing cap 23 passes through bolted connection with base 1, and the one end and the resilience closing cap 23 fixed connection of resilience piece 22 are kept away from to spring 21. Rebound closing cap 23 seals rebound block 22 and spring 21 in spout 24, and its device simple structure just can effectively avoid spring 21 and rebound block 22 to burst out from spout 24, and its security and reliability are strong. When the limiting block b12 is driven by the limiting block a11 to rotate to the above-mentioned contact with the rebound resetting device 2, that is, it contacts with one end of the rebound block 22, the rebound block 22 is driven by it to displace, compressing the spring 21 at its other end, the spring 21 stores elastic potential energy, when the limiting block a11 rotates in the opposite direction to move away, the spring 21 rebounds, the stored potential energy is released, so that the limiting block b12 is far away from the position of the microswitch 4.

During concrete implementation, base 1 still includes ring flange 3, and the pivot 9 is located to the ring flange 3 cover, and ring flange 3 passes through the screw connection with base 1, and above-mentioned spout 24 and resilience resetting means 2 all set up on ring flange 3. In practical applications, the base 1 is usually a structure of the turntable device itself, which is not convenient for processing the sliding chute. The flange 3 is additionally arranged on the base 1, so that the limit requirement of the limit mechanism can be met according to the arrangement mode, and the limit mechanism is simple in structure and convenient to assemble and disassemble; meanwhile, once the sliding groove 24 or the rebound resetting device is damaged, the whole device can be replaced and repaired more easily.

Because the sliding turntable 5 connected with the limit block b12 is connected with the rotating shaft 9 through a bearing, in practical application, although the friction force is small, the friction force cannot be zero, in order to prevent the limit block b12 and the sliding turntable 5 from rotating along with the rotating shaft 9 under the action of the friction force, in order to prevent false triggering, when setting is needed, the end part of the rebound block 22 is completely positioned in front of the trigger point of the microswitch 4, and when the limit block b12 rotates to the rebound block position along with the shaft, the force driven by the shaft is small, and is not enough to compress the spring 21 to trigger the microswitch 4. As can be seen from the above process, there is a high demand for the position where the rebound block 22 is disposed. Therefore, when the device is implemented specifically, the base 1 is fixedly provided with the blocking device, and the blocking device can effectively prevent the limiting block b12 and the sliding turntable 5 from rotating together with the rotating shaft 9 under the action of the friction force, and the limiting block b12 triggers the micro switch 4 when not contacted by the limiting block a11, so that the false limiting condition of the device is caused.

When the specific implementation, this blocking device includes mounting box 61, stopper c62 and spring b, mounting box 61 and base 1 fixed connection, stopper c62 slidable sets up in mounting box 61, spring b's one end and mounted box 61 fixed connection, its other end and stopper c62 fixed connection, stopper c62 keep away from spring b's one end and stopper b12 contactable setting. When the limiting block b12 is driven by the limiting block a11 to move, the driving force applied to the limiting block b12 is large, when the limiting block c62 contacts the limiting block b12, the limiting block b12 can compress the spring b under the large driving force and return, the blocking device cannot block the limiting block b12 at the moment, the limiting block b12 can pass through smoothly, and after the limiting block b12 passes through, the spring b rebounds to enable the limiting block c62 to reset; when the limit block b12 is moved by the rotation of the rotating shaft 9, the driving force for the movement is the friction force existing at the bearing, and the driving force is small, at this time, the limit block b12 is not enough to return when moving to the limit block c62, and the limit block c62 blocks the limit block b12, so that the limit block b12 is prevented from moving continuously.

Furthermore, a limiting block a11 and a limiting block b12 are both fan-shaped structures, a limiting block a11 is detachably connected with the limiting turntable 10, and a limiting block b12 is detachably connected with the sliding turntable 5. The limiting angle of the mechanism can be conveniently adjusted. The adjusting method is to adjust the limiting angle of the limiting mechanism by replacing the limiting block a11 and the limiting block b12 with different fan-shaped angles, the adjustment is simple, and the use requirements of various limiting angle working conditions can be met.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The limiting mechanism with the angle larger than plus or minus 180 degrees is characterized by comprising a base (1), a sliding turntable (5), a rotating shaft (9), a limiting turntable (10), two micro switches (4) and two rebound resetting devices (2), wherein the rotating shaft (9) sequentially penetrates through the base (1) and the sliding turntable (5), the rotating shaft (9), the base (1) and the sliding turntable (5) are connected through bearings, the limiting turntable (10) is fixedly sleeved at one end, close to the sliding turntable (5), of the rotating shaft (9), and the two micro switches (4) and the two rebound resetting devices (2) are fixedly connected with the base (1);

a symmetry axis is formed along the radial direction of the rotating shaft (9), the two microswitches (4) are symmetrically arranged along the symmetry axis, and the two rebound resetting devices (2) are symmetrically arranged along the symmetry axis;

the limiting rotary table is characterized in that a limiting block a (11) is fixedly arranged on the limiting rotary table (10), a limiting block b (12) is fixedly arranged on the sliding rotary table (5), one end of the limiting block a (11) and one end of the limiting block b (12) can be contacted, the other end of the limiting block a (11) and the other end of the limiting block b (12) can be contacted, a protruding portion is arranged on one side, away from the rotating shaft (9), of the limiting block b (12), the protruding portion and two contacts of the micro switch (4) can be contacted, the rebound resetting device (2) and one end of the limiting block b (12) can be contacted, and the distance from the edge of the limiting block a (11) to the axis of the rotating shaft (9) is smaller than the distance from the contacts of the micro switch (4) to the axis of the rotating shaft (9).

2. A spacing mechanism of more than plus or minus 180 degrees according to claim 1, characterized in that the connecting line between the contacts of two said micro switches (4) is intersected with the central axis of said rotating shaft (9).

3. The limiting mechanism of claim 2, wherein the rebound resetting device (2) comprises a spring (21) and a rebound block (22), the base (1) is provided with an annular sliding groove (24), the rebound block (22) is slidably arranged in the sliding groove (24), the spring (21) is arranged in the sliding groove (24), one end of the spring (21) is fixedly connected with the base (1), the other end of the spring is fixedly connected with one end of the rebound block (22), and the other end of the rebound block (22) is matched with the limiting block b (12).

4. A limiting mechanism of more than plus or minus 180 degrees according to claim 3, further comprising a rebound cover (23), wherein the rebound cover (23) is arranged at the notch position of the sliding groove (24), the rebound cover (23) is connected with the base (1) through a screw, and one end of the spring (21) far away from the rebound block (22) is fixedly connected with the rebound cover (23).

5. The limiting mechanism with the angle greater than plus or minus 180 degrees as claimed in claim 4, wherein the base (1) further comprises a flange (3), the flange (3) is sleeved outside the rotating shaft (9), the flange (3) is connected with the base (1) through screws, and the sliding groove (24) is arranged on the flange (3).

6. A limiting mechanism of more than plus or minus 180 degrees according to claim 2, characterized in that a blocking device is fixedly arranged on the base (1), and the blocking device is used for limiting the limiting block b (12) to rotate along with the rotating shaft (9).

7. The limiting mechanism of claim 6, wherein the blocking device comprises a mounting box (61), a limiting block c (62) and a spring b, the mounting box (61) is fixedly connected with the base (1), the limiting block c (62) is slidably disposed in the mounting box (61), one end of the spring b is fixedly connected with the mounting box (61), the other end of the spring b is fixedly connected with the limiting block c (62), and one end of the limiting block c (62) far away from the spring b is contactably disposed with the limiting block b (12).

8. The limiting mechanism according to any one of claims 2 to 7, wherein the limiting blocks a (11) and b (12) are both fan-shaped.

9. The limiting mechanism of claim 8, wherein the limiting block a (11) is detachably connected with the limiting rotary disk (10), and the limiting block b (12) is detachably connected with the sliding rotary disk (5).