Rotary limiting mechanism

Abstract

The utility model discloses a rotation limiting mechanism, which relates to the technical field of precision machining and particularly comprises a shell, a partition plate is fixedly connected to the top end of an inner cavity of the shell and divides the inner cavity of the shell into a limiting cavity and a transmission cavity, a transmission structure is arranged on one side of the limiting cavity and comprises a first chain wheel and a second chain wheel, and the first chain wheel and the second chain wheel are arranged on the shell. Two first chain wheels are movably connected to one side of the limiting cavity, a second chain wheel is arranged at the bottom of one first chain wheel, one first chain wheel makes contact with the second chain wheel through a fourth electromagnet, the two first chain wheels are in transmission connection through a first chain, and a rotating motor is movably connected into an inner cavity of the limiting cavity. According to the rotation limiting mechanism, through the arrangement of the transmission structure, the actual rotation stroke of the rotation structure can be shortened, the size of the limiting mechanism is reduced, the limiting mechanism can adjust the distance between the fixing block and the limiting block through the rotation motor, the fixing block can be limited through the limiting block, and use of the limiting mechanism is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to precision machining technical field, concretely is a kind of rotary limiting mechanism. BACKGROUND

[0002] Rotary limiting mechanism plays a vital role in precision machining, it is used to ensure the accurate position and angle of workpiece in the rotation process, so as to ensure machining accuracy and quality.In related technology, rotary limiting mechanism is usually limited by contact limiting mode of limiting the length of the axial movement of rotating shaft through inductive block, proximity switch and other non-contact limiting mode or pure mechanical structure.The current rotary structure is usually driven by motor, but due to the inertia of motor rotation, the rotary structure is still easy to continue to rotate under the action of inertia when the motor stops, which affects the rotation accuracy, and the rotary structure is easy to hit the contact limiting mechanism, which affects the service life of the contact limiting structure, and when using non-contact limiting structure, the use effect of limiting structure is easy to be affected;Based on this, the present application proposes a kind of rotary limiting mechanism. SUMMARY

[0003] The utility model provides a kind of rotary limiting mechanism, solve the problem that the rotary structure is easy to continue to rotate under the action of inertia, which affects the rotation accuracy in the above background technology.

[0004] The utility model provides following technical scheme: a kind of rotary limiting mechanism, including shell, the top of the inner chamber of shell is fixedly connected with partition, the inner chamber of shell is divided into limiting cavity and transmission cavity by partition, one side of limiting cavity is equipped with transmission structure, and transmission structure includes sprocket one and sprocket two, one side of limiting cavity is movably connected with two sprocket one, and the bottom of one sprocket one is provided with sprocket two, one sprocket one and sprocket two are contacted by electromagnet four, two sprocket one are drivenly connected by chain one, the inner chamber of limiting cavity is movably connected with rotating motor, the output shaft end of rotating motor is fixedly connected with one sprocket one, the top of rotating motor is fixed with electromagnet five, electromagnet five is contacted with shell, the outside of one straight section of chain one is fixedly connected with fixed block, the two sides of the inner chamber of limiting cavity are all connected with limiting block by electric telescopic handle, fixed block is located between two limiting blocks, and the inside of limiting block is equipped with electromagnet one and pressure sensor;The other side of limiting cavity is movably connected with power output shaft, power output shaft and sprocket two are drivenly connected by chain two, the bottom end of power output shaft extends to the top of the inner chamber of transmission cavity, the bottom of power output shaft is fixedly connected with electromagnet two, the top end of power output shaft extends to the outside of shell, power output shaft is movably connected with shell;

[0005] The top of the transmission cavity inner cavity is movably connected with a rotating ring, the bottom end of the power output shaft is located in the middle of the rotating ring inner cavity, the bottom of the rotating ring is connected with a moving sleeve through a spring and a guide rod, the bottom of the shell is movably connected with a power input shaft, the top of the power input shaft is fixedly connected with a transmission block, the bottom of the moving sleeve is provided with a transmission groove matched with the transmission block, and the top of the moving sleeve is fixedly connected with an electromagnet three.

[0006] Preferably, the bottom of the rotating ring is uniformly fixedly connected with the spring and the guide rod, the other end of the spring is fixedly connected with the top of the moving sleeve, the side wall of the moving sleeve is provided with a guide groove, and the end of the guide rod away from the rotating ring is movably connected with the inner cavity of the guide groove.

[0007] Preferably, the side wall of the transmission block is provided with outwardly protruding ribs, the power input shaft is movably connected with the inner cavity of the transmission groove, the height value of the transmission block is not greater than the height value of the transmission groove, and the distance value between the transmission block and the bottom of the power output shaft is less than the height value of the transmission block.

[0008] Preferably, the bottom and the top of the moving sleeve are fixedly connected with isolation pads; when the electromagnet five is in an energized state, the electromagnet five is magnetically attracted to the shell, when the electromagnet one is in an energized state, the electromagnet one is magnetically attracted to the fixed block, and when the electromagnet four is in an energized state, the electromagnet four is magnetically attracted to the sprocket two in contact therewith.

[0009] Preferably, the outer ring of the power output shaft is fixedly connected with a sprocket ring, and the sprocket ring and the sprocket two are drivingly connected through the chain two.

[0010] Preferably, the outer diameter of the sprocket one is less than the outer diameter of the sprocket two, the sprocket two is movably connected with the top of the partition plate, the top of the sprocket two is fixedly connected with the electromagnet four, and the electromagnet four is in contact with the bottom of the sprocket one.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1、The rotation limiting mechanism, through the setting of the transmission structure, can reduce the actual rotation stroke of the rotating structure, reduce the size of the limiting mechanism, and adjust the distance between the fixed block and the limiting block by using the rotating motor, so that the limiting block can limit the fixed block, and the use of the limiting mechanism is facilitated.

[0013] 2、The rotation limiting mechanism, through the setting of the electromagnet one, the energization of the electromagnet one makes the electromagnet one and the fixed block can be magnetically attracted, the position of the power output shaft is fixed, the rotation precision of the rotation structure is guaranteed, through the setting of the electromagnet three and the electromagnet two, the power input shaft can drive the power output shaft to rotate or keep the state of mutual independence with the power output shaft, when the rotation structure stops rotating, the driving part does not affect the rotation precision of the rotation structure due to inertial motion, and precise machining is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view of the structure of the utility model;

[0015] Figure 2 It is a bottom view of the structure of the utility model;

[0016] Figure 3 It is a schematic view of the internal structure of the utility model;

[0017] Figure 4 It is a schematic view of the internal structure of the utility model Figure 3 bottom view;

[0018] Figure 5 It is a schematic view of the power input shaft and the moving sleeve connection of the structure of the utility model;

[0019] Figure 6 It is a schematic view of the internal structure of the utility model Figure 5 explosion schematic view;

[0020] Figure 7 It is a schematic view of the electromagnet four of the utility model.

[0021] In the drawing: 1, shell; 2, power output shaft; 3, power input shaft; 4, partition plate; 5, rotating ring; 6, guide rod; 7, moving sleeve; 8, chain wheel one; 9, chain wheel two; 10, transmission groove; 11, limiting block; 12, pressure sensor; 13, electromagnet one; 14, fixed block; 15, chain one; 16, electric telescopic rod; 17, chain two; 18, electromagnet three; 19, spring; 20, transmission block; 21, rotating motor; 22, electromagnet two; 23, electromagnet four; 24, electromagnet five. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0023] The utility model provides a kind of rotary limiting mechanism, including shell 1, the top of the inner chamber of shell 1 is fixedly connected with partition plate 4, partition plate 4 divides the inner chamber of shell 1 into limiting cavity and transmission cavity, and one side of limiting cavity is equipped with transmission structure, and transmission structure includes sprocket one 8 and sprocket two 9, and one side of limiting cavity is movably connected with two sprocket one 8, and two sprocket one 8 are drivenly connected by chain one 15.The inner chamber of limiting cavity is movably connected with rotating motor 21, the top of rotating motor 21 is fixedly connected with electromagnet five 24, electromagnet five 24 is in contact with shell, and when electromagnet five 24 is powered, electromagnet five 24 and shell are magnetically attracted, and the material of the contact part of shell and electromagnet five 24 can be metal iron, by the setting of electromagnet five 24, under the condition of power supply, electromagnet five 24 and shell 1 are magnetically attracted, so that rotating motor 21 and shell 1 are in the state of fixed connection, and when electromagnet five 24 is in the state of power failure, rotating motor 21 and shell 1 are in the state of movable connection.

[0024] The output shaft end of rotating motor 21 is fixedly connected with a sprocket one 8 by speed reducer, and the rotation of rotating motor 21 can drive sprocket one 8 to rotate when electromagnet five 24 is in the state of power supply by the setting of rotating motor 21.

[0025] The bottom of a sprocket one 8 is provided with sprocket two 9; sprocket two 9 is movably connected with the top of partition plate 4, and the top of sprocket two 9 is fixedly connected with electromagnet four 23, electromagnet four 23 is in contact with the bottom of sprocket one 8, and electromagnet four 23 and sprocket one 8 are magnetically attracted when electromagnet four 23 is in the state of power supply, and under the action of the attractive force, sprocket two 9 can drive sprocket one 8 to rotate when rotating.

[0026] The other side of limiting cavity is movably connected with power output shaft 2, and power output shaft 2 is drivenly connected with sprocket two 9 by chain two 17, and the outer ring of power output shaft 2 is fixedly connected with sprocket ring, and sprocket ring is drivenly connected with sprocket two 9 by chain two 17, and power output shaft 2 can drive sprocket ring to rotate when rotating, and sprocket ring can drive sprocket two 9 to rotate by chain two 17, and the outer diameter of sprocket one 8 is less than the outer diameter of sprocket two 9, so the moving stroke of chain one 15 is less than the moving stroke of chain two 17, so as to limit the rotary stroke of the rotary structure, and the size of sprocket one 8 and sprocket two 9 can be set according to requirements, which is not limited here.

[0027] The outer side of a straight section of the chain one 15 is fixedly connected with a fixed block 14, the two sides of the limiting cavity inner cavity are connected with limiting blocks 11 through electric telescopic rods 16, the fixed block 14 is located between the two limiting blocks 11, and the inner side of the limiting block 11 is provided with an electromagnet one 13 and a pressure sensor 12, through the setting of the electric telescopic rod 16, the extension and contraction of the electric telescopic rod 16 can change the position of the limiting block 11 connected therewith, the limiting block 11 can limit the fixed block 14, and the distance between the limiting block 11 and the fixed block 14 can be changed, so that the mechanism can adapt to various rotation strokes, and the pressure sensor 12 can detect whether the fixed block 14 is in contact with the limiting block 11, when the fixed block 14 is in contact with the limiting block 11, the electromagnet one 13 is in the state of being electrified, the electromagnet one 13 and the fixed block 14 are magnetically attracted to each other, the fixed block 14 is fixed, and the fixed block 14 can be made of metal iron.

[0028] As can be known from the above description, when the electromagnet four 23 is in the state of being powered off, the chain one 15 and the chain two 17 are in a mutually independent state, the position of the fixed block 14 between the two limiting blocks 11 can be adjusted by using the rotating motor 21, so that the limiting block can limit the fixed block 14, facilitating the use of the limiting mechanism, when the electromagnet four 23 is in the state of being powered on, the power output shaft 2 can drive the chain wheel two 9 to rotate through the chain two 17, the chain wheel two 9 can drive the chain one 15 to rotate through the chain wheel one 8, the chain one 15 drives the fixed block 14 to move, the limiting block 11 can limit the fixed block 14, guaranteeing the rotation accuracy of the power output shaft 2, and under the action of the electromagnet one 13, the fixed block 14 can be fixed with the limiting block 11, so that the rotating structure connected with the power output shaft 2 can quickly stop rotating, guaranteeing the rotation accuracy of the rotating structure.

[0029] The bottom end of the power output shaft 2 extends to the top end of the transmission cavity inner cavity, the bottom of the power output shaft 2 is fixedly connected with the electromagnet two 22, the top end of the power output shaft 2 extends to the outside of the shell 1, and the power output shaft 2 is movably connected with the shell 1. The top of the transmission cavity inner cavity is movably connected with the rotating ring 5, the bottom end of the power output shaft 2 is located in the middle of the inner cavity of the rotating ring 5, the bottom of the rotating ring 5 is connected with the moving sleeve 7 through the spring 19 and the guide rod 6, the bottom of the rotating ring 5 is uniformly fixedly connected with the spring 19 and the guide rod 6, the other end of the spring 19 is fixedly connected with the top of the moving sleeve 7, the side wall of the moving sleeve 7 is provided with a guide groove, and the end, away from the rotating ring 5, of the guide rod 6 is movably connected with the inner cavity of the guide groove. The top of the moving sleeve 7 is fixedly connected with the electromagnet three 18. Through the arrangement of the electromagnet three 18 and the electromagnet two 22, when the same direction current is input into the electromagnet three 18 and the electromagnet two 22, the electromagnet three 18 and the electromagnet two 22 are in the state of magnetic attraction, under the action of the attraction, the bottom of the moving sleeve 7 can contact the bottom of the power output shaft 2, and when the electromagnet three 18 and the electromagnet two 22 are in the state of power-off, under the action of the elastic force of the spring 19, the moving sleeve 7 can be separated from the power output shaft 2. The bottom and the top of the moving sleeve 7 are fixedly connected with isolation pads, the material of the isolation pads can be rubber, so that the impact force when the moving sleeve 7 moves is reduced.

[0030] The bottom of the shell 1 is movably connected with the power input shaft 3, the top of the power input shaft 3 is fixedly connected with the transmission block 20, the bottom of the moving sleeve 7 is provided with a transmission groove 10 matched with the transmission block 20, the side wall of the transmission block 20 is provided with outward protruding ribs, the transmission block 20 and the transmission groove 10 can be of rectangular structure, the power input shaft 3 is movably connected with the inner cavity of the transmission groove 10, the height value of the transmission block 20 is not greater than the height value of the transmission groove 10, the distance value between the transmission block 20 and the bottom of the power output shaft 2 is less than the height value of the transmission block 20, the distance value between the bottom of the power output shaft 2 and the bottom of the inner cavity of the shell 1 is greater than the height value of the moving sleeve 7, and the sizes of the transmission block 20 and the moving sleeve 7 can be set according to requirements, which are not limited herein.

[0031] As known from the above description, when the same direction current is input into the electromagnet three 18 and the electromagnet two 22, the rotation of the power input shaft 3 can drive the power output shaft 2 to rotate through the transmission block 20 and the moving sleeve 7, when the power output shaft 2 reaches the rotation stroke, the electromagnet three 18 and the electromagnet two 22 are in the state of power-off, the moving sleeve 7 is separated from the power output shaft 2, and the inertial rotation of the power input shaft 3 will not affect the power output shaft 2.

[0032] The electromagnet models in the application can all be LS-P20 / 23S.

[0033] The electrical components involved in the present application are all prior art, and those skilled in the art understand their connection methods. Those skilled in the art will connect all electrical components in the present application with their adapted power supply through wires, and select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence are described below. The order of operation between electrical devices completes the electrical connection, and the detailed connection means is a known technology in the art. The working principle and process are mainly introduced below, and the electrical control is not described.

[0034] In summary: when the rotation limiting mechanism is in use, the bottom of the power input shaft 3 is connected to the output shaft end of the driving part (such as a motor) that drives the rotation of the rotating structure, and the power output shaft 2 is connected to the power input shaft of the rotating structure. When the rotating structure needs to rotate, the controller adjusts the distance between the limiting block 11 and the fixed block 14 according to the rotating stroke of the rotating structure. The electromagnet four 23, the electromagnet three 18, and the electromagnet two 22 are all in the state of being energized, and the electromagnet three 18 and the electromagnet two 22 are both connected to the same direction of current. The electromagnet three 18 and the electromagnet two 22 are in a state of magnetic attraction. Under the action of this attractive force, the moving sleeve 7 is tightly attached to the power output shaft 2. The energization of the electromagnet four 23 causes the electromagnet four 23 and the sprocket one 8 in contact with it to be in a state of magnetic attraction. The driving part works, and the driving part drives the power input shaft 3 to rotate. The power input shaft 3 drives the power output shaft 2 to rotate through the transmission block 20 and the moving sleeve 7. The power output shaft 2 drives the rotating structure to rotate, and the power output shaft 2 drives the sprocket two 9 to rotate through the chain two 17. The sprocket two 9 drives the sprocket one 8 that is magnetically attracted to the electromagnet four 23 to rotate. The rotating sprocket one 8 drives the chain one 15 to rotate. The chain one 15 drives the fixed block 14 to move. When the fixed block 14 contacts the limiting block 11, the pressure sensor 12 detects the pressure. At this time, the electromagnet one 13 is in the state of being energized, and the electromagnet three 18 and the electromagnet two 22 are both in the state of being de-energized. The electromagnet one 13 is magnetically attracted to the fixed block 14, which fixes the fixed block 14, thereby fixing the position of the power output shaft 2, avoiding the continued rotation of the rotating structure. When the electromagnet three 18 and the electromagnet two 22 are both in the state of being de-energized, the moving sleeve 7 can be separated from the power output shaft 2 under the action of the spring 19, avoiding the influence of the inertial rotation of the driving part on the rotation accuracy of the rotating structure. And when the distance between the limiting block 11 and the fixed block 14 is less than the rotating stroke of the rotating structure, the electromagnet four 23 is in the state of being de-energized, and the electromagnet five 24 is in the state of being energized. The rotating motor 21 drives the sprocket one 8 connected to it to rotate, adjusts the distance between the fixed block 14 and the limiting block 11, and facilitates the use of the limiting mechanism.

[0035] The utility model uses to standard parts can be bought from market, and the special-shaped part can be ordered according to the record of specification and drawing, and the specific connecting mode of each part all adopts the conventional means such as bolt in prior art, and the machinery, parts and equipment all adopt conventional model in prior art, and this will not be described in detail, the content not being described in detail in the specification belongs to the prior art known to the person skilled in the art, although the embodiment of the utility model has been shown and described, for the ordinary skilled person in the art, it can be understood that the embodiment can be changed, modified, replaced and modified in various ways without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A rotation limiting mechanism comprising a housing (1), characterized in that: The top end of the inner cavity of the shell (1) is fixedly connected with a partition plate (4), which divides the inner cavity of the shell (1) into a limiting cavity and a transmission cavity, one side of the limiting cavity is provided with a transmission structure, the transmission structure comprises a chain wheel one (8) and a chain wheel two (9), two chain wheel ones (8) are movably connected on one side of the limiting cavity, a chain wheel two (9) is arranged at the bottom of one chain wheel one (8), one chain wheel one (8) and the chain wheel two (9) are in contact through an electromagnet four (23), the two chain wheel ones (8) are drivingly connected through a chain one (15), a rotating motor (21) is movably connected in the inner cavity of the limiting cavity, the output shaft of the rotating motor (21) is fixedly connected with one chain wheel one (8), an electromagnet five (24) is fixedly connected to the top of the rotating motor (21), the electromagnet five (24) is in contact with the shell, a fixed block (14) is fixedly connected to the outer side of a straight section of the chain one (15), both sides of the inner cavity of the limiting cavity are connected with limiting blocks (11) through electric telescopic rods (16), the fixed block (14) is located between the two limiting blocks (11), and the inner side of the limiting block (11) is provided with an electromagnet one (13) and a pressure sensor (12); the other side of the limiting cavity is movably connected with a power output shaft (2), the power output shaft (2) and the chain wheel two (9) are drivingly connected through a chain two (17), the bottom end of the power output shaft (2) extends to the top end of the inner cavity of the transmission cavity, the bottom of the power output shaft (2) is fixedly connected with an electromagnet two (22), the top end of the power output shaft (2) extends to the outside of the shell (1), and the power output shaft (2) is movably connected with the shell (1); The top of the inner cavity of the transmission cavity is movably connected with a rotating ring (5), the bottom end of the power output shaft (2) is located in the middle of the inner cavity of the rotating ring (5), the bottom of the rotating ring (5) is connected with a moving sleeve (7) through a spring (19) and a guide rod (6), the bottom of the moving sleeve (7) is provided with a transmission groove (10) matched with the transmission block (20), and the top of the moving sleeve (7) is fixedly connected with an electromagnet three (18).

2. A rotation limiting mechanism according to claim 1, characterized in that: The bottom of the rotating ring (5) is uniformly fixedly connected with the spring (19) and the guide rod (6), the other end of the spring (19) is fixedly connected with the top of the moving sleeve (7), the side wall of the moving sleeve (7) is provided with a guide groove, and the end, away from the rotating ring (5), of the guide rod (6) is movably connected with the inner cavity of the guide groove.

3. The rotation limiting mechanism of claim 1, wherein: The side wall of the transmission block (20) is provided with outwardly protruding ribs, the power input shaft (3) is movably connected with the inner cavity of the transmission groove (10), the height value of the transmission block (20) is not greater than the height value of the transmission groove (10), and the distance value between the transmission block (20) and the bottom of the power output shaft (2) is less than the height value of the transmission block (20).

4. The rotation limiting mechanism of claim 1, wherein: The bottom and top of the moving sleeve (7) are fixedly connected with isolation pads; when the electromagnet five (24) is in an energized state, the electromagnet five (24) is magnetically attracted to the shell (1), when the electromagnet one (13) is in an energized state, the electromagnet one (13) is magnetically attracted to the fixed block (14); when the electromagnet four (23) is in an energized state, the electromagnet four (23) is magnetically attracted to the sprocket two (9) in contact therewith.

5. The rotation limiting mechanism of claim 1, wherein: The outer ring of the power output shaft (2) is fixedly connected with a sprocket ring, and the sprocket ring is in transmission connection with the sprocket two (9) through the chain two (17).

6. A rotation limiting mechanism according to claim 1, wherein: The outer diameter of the sprocket one (8) is smaller than that of the sprocket two (9); the sprocket two (9) is movably connected with the top of the partition plate (4), and the top of the sprocket two (9) is fixedly connected with the electromagnet four (23), and the electromagnet four (23) is in contact with the bottom of the sprocket one (8).

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