CN216084701U - Three-station operating mechanism and three-station switch - Google Patents
Three-station operating mechanism and three-station switch Download PDFInfo
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- CN216084701U CN216084701U CN202121897160.2U CN202121897160U CN216084701U CN 216084701 U CN216084701 U CN 216084701U CN 202121897160 U CN202121897160 U CN 202121897160U CN 216084701 U CN216084701 U CN 216084701U
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Abstract
The utility model provides a three-station operating mechanism and a three-station switch, wherein the three-station operating mechanism comprises a mechanism body, an operating handle and a linkage structure, and the mechanism body comprises: frame, output shaft, worm wheel, worm, operating handle includes: the first handle part is connected with the worm in a rotation stopping way; the second handle part is matched with the first handle part in an inserting mode, one of the first handle part and the second handle part is provided with a plug, the other one of the first handle part and the second handle part is provided with a sleeve, the plug is provided with a first ratchet and a second ratchet, and the wall of the sleeve barrel is hinged with a first pawl and a second pawl. When the rotating angle of the output shaft reaches a set value, the linkage structure pushes the first pawl or the second pawl to release the locking with the first ratchet or the second ratchet, and the second handle part and the first handle part are in idle running fit, so that the damage of a worm and a static contact is avoided, the safety is improved, and the service life is prolonged.
Description
Technical Field
The utility model relates to the technical field of high-voltage switch equipment, in particular to a three-position operating mechanism and a three-position switch.
Background
The three-position switch is commonly used in the totally-enclosed combined electrical apparatus and the composite electrical apparatus, and comprises three working position states: the three positions are very clear on the operating mechanism, the middle position is the isolation position, the two ends are the closing position and the grounding position respectively, mechanical locking is realized by a knife, and the main loop is prevented from being electrified and being grounded. During manual operation, the worm is shaken through the handle, the worm drives the worm wheel to rotate, and further the output shaft coaxial with the worm wheel drives the moving contact at the middle isolation position to move towards the limit positions at the two ends, so that the moving contact is fully contacted with the fixed contacts at the two ends, and closing and grounding are respectively realized.
However, when the three-station operating mechanism is manually shaken, the worm is often shaken out of the limit position, so that the worm is damaged, and the static contact is also easily damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a three-station operating mechanism which is better in safety and longer in service life; the utility model also aims to provide the three-position switch which is better in safety and longer in service life.
In order to achieve the purpose, the three-station operating mechanism adopts the following technical scheme:
the three-station operating mechanism comprises a mechanism body and an operating handle;
wherein, the mechanism body includes:
a frame;
the output shaft is arranged on the rack and used for driving the moving contact to switch among three stations of closing, isolating and grounding;
the worm wheel is arranged on the output shaft and synchronously rotates with the output shaft;
the worm is arranged on the rack, is in transmission fit with the worm wheel and is used for driving the worm wheel to rotate;
wherein, operating handle includes:
the first handle part is provided with a connecting structure for rotation stopping connection with the worm;
the second handle part is connected with the first handle part in an inserting and matching mode, one of the first handle part and the second handle part is provided with a plug, the other one of the first handle part and the second handle part is provided with a sleeve, an inner hole of the sleeve forms a jack for the plug to be inserted into, the plug is provided with a first ratchet and a second ratchet, and the wall of the sleeve is hinged with a first pawl and a second pawl;
the first pawl is provided with a first stopping end and a first exposed end, wherein the first stopping end is used for extending into the jack to be matched with the first ratchet in a clockwise stopping mode, and the first exposed end is exposed outside the cylinder wall to force the first pawl to rotate when being pressed by external force;
the second pawl is provided with a second stopping end and a second exposed end, wherein the second stopping end is used for extending into the jack to be matched with the second ratchet in a stopping manner in the anticlockwise direction, and the second exposed end is exposed outside the cylinder wall to force the second pawl to rotate when being pressed by external force;
three station operating device still includes:
and the linkage structure is linked with the output shaft or the worm so as to synchronously act along with the action of the output shaft or the worm, and presses the first exposed end or the second exposed end when the rotation angle of the output shaft or the worm reaches a set value, so that the second handle part and the first handle part are in idle running fit in the clockwise direction or the anticlockwise direction.
The beneficial effects of the above technical scheme are that: the first handle part and the second handle part are connected in an inserting and matching mode through a plug and a jack, a first ratchet and a second ratchet are arranged on the plug, a first pawl and a second pawl are hinged to the wall of the sleeve, the first pawl is provided with a first stopping end and a first exposing end, and the second pawl is provided with a second stopping end and a second exposing end; or when the second handle part is rotated anticlockwise, the second stopping end is matched with the second ratchet in a stopping manner in the anticlockwise direction, so that the second handle part drives the first handle part to synchronously rotate anticlockwise, the worm is driven to rotate anticlockwise through the connecting structure on the first handle part, and finally the output shaft drives the moving contact to reversely move through the transmission of the worm and the worm wheel.
The three-station operating mechanism further comprises a linkage structure which is linked with the output shaft or the worm, the linkage structure synchronously acts along with the action of the output shaft or the worm, when the rotation angle of the output shaft or the worm reaches a set value, the first exposed end or the second exposed end can be pressed, the first pawl or the second pawl can be rotated, the stop matching relationship between the first stop end and the first ratchet or between the second stop end and the second ratchet is released, the second handle part and the first handle part are in idle rotation matching in the clockwise direction or the anticlockwise direction, the second handle part can not be driven to act by continuously rotating the second handle part, namely, the worm can not be driven to rotate any more, and the mechanical damages such as worm damage, static contact damage and the like can be avoided.
In addition, because the first elastic part is arranged between the first pawl and the cylinder wall, and the second elastic part is arranged between the second pawl and the cylinder wall, when the second handle part rotates reversely, the linkage structure releases the pressing on the first exposed end or the second exposed end, and then the first pawl or the second pawl can reset under the action of the first elastic part or the second elastic part, so that the handle can be repeatedly used.
Furthermore, the linkage structure comprises a cam arranged on the output shaft, a swing plate matched with the cam and a moving plate matched with the swing plate, wherein a curved surface with gradually reduced curvature is arranged on the cam, one end of the swing plate is hinged to the rack, the other end of the swing plate is in transmission fit with the moving plate, a small hole in jacking fit with the curved surface of the cam and a large hole for avoiding the curved surface are arranged on the swing plate, so that the cam drives the swing plate to rotate through jacking fit with the small hole in the rotating process, the swing plate drives the moving plate to move along the radial direction of the sleeve, and the first exposed end or the second exposed end is jacked.
The beneficial effects of the above technical scheme are that: the linkage structure is convenient to process, install and use.
Further, the moving plate comprises a plate body and a moving cylinder fixed on the plate body, and the moving cylinder is sleeved outside the sleeve and used for pressing the first exposed end or the second exposed end.
The beneficial effects of the above technical scheme are that: the first exposed end or the second exposed end is pressed through the movable barrel, so that the pressing operation is convenient.
Furthermore, a first mounting hole for mounting a first pawl is formed in the cylinder wall, and the size of the first mounting hole is larger than that of the first pawl, so that a first stop end and a first exposed end of the first pawl can rotate into the first mounting hole; the cylinder wall is further provided with a second mounting hole for mounting a second pawl, and the size of the second mounting hole is larger than that of the second pawl, so that a second stopping end and a second exposing end of the second pawl can rotate into the second mounting hole.
The beneficial effects of the above technical scheme are that: through setting up the first mounting hole and the second mounting hole of great size, make things convenient for the installation of first pawl and second pawl, first keep off end and first end, second keep off end and second and expose the end homoenergetic and rotate to corresponding mounting hole in, conveniently remove the locking.
Furthermore, a first stop plate for preventing the first pawl from rotating anticlockwise is fixed at the orifice of the first mounting hole; and a second stop plate for preventing the second pawl from rotating clockwise is fixed at the opening of the second mounting hole.
The beneficial effects of the above technical scheme are that: the first pawl and the second pawl are conveniently stopped through the stop plate, and the processing and the assembly are convenient.
Further, the first pawl and the second pawl are symmetrically arranged at 180 degrees.
The beneficial effects of the above technical scheme are that: the first exposed end or the second exposed end is pressed by the linkage structure conveniently, and idle rotation matching of the second handle part and the first handle part is achieved.
Furthermore, a first ratchet wheel and a second ratchet wheel which are coaxial with the plug are mounted on the plug, the first ratchet wheel is formed by gear teeth of the first ratchet wheel, and the second ratchet wheel is formed by gear teeth of the second ratchet wheel.
The beneficial effects of the above technical scheme are that: the ratchet wheel has more gear teeth, so that the ratchet wheel can conveniently form a stop matching relation with the first pawl or the second pawl.
Further, a first exposed end of the first pawl is provided with a first arc surface; the second exposed end of the second pawl is provided with a second arc surface.
The beneficial effects of the above technical scheme are that: the arc surface is convenient for the linkage structure to press the first exposed end or the second exposed end, so that the friction force is reduced.
Furthermore, the operating handle also comprises a connecting rod fixedly connected with the second handle part and a crank fixedly connected with the connecting rod.
The beneficial effects of the above technical scheme are that: the operating handle is rotated through the connecting rod and the crank, so that labor is saved, and the operation is convenient.
In order to achieve the purpose, the three-position switch adopts the following technical scheme:
the three-station switch comprises a switch body and a three-station operating mechanism, wherein the three-station operating mechanism comprises a mechanism body and an operating handle;
wherein, the mechanism body includes:
a frame;
the output shaft is arranged on the rack and used for driving the moving contact to switch among three stations of closing, isolating and grounding;
the worm wheel is arranged on the output shaft and synchronously rotates with the output shaft;
the worm is arranged on the rack, is in transmission fit with the worm wheel and is used for driving the worm wheel to rotate;
wherein, operating handle includes:
the first handle part is provided with a connecting structure for rotation stopping connection with the worm;
the second handle part is connected with the first handle part in an inserting and matching mode, one of the first handle part and the second handle part is provided with a plug, the other one of the first handle part and the second handle part is provided with a sleeve, an inner hole of the sleeve forms a jack for the plug to be inserted into, the plug is provided with a first ratchet and a second ratchet, and the wall of the sleeve is hinged with a first pawl and a second pawl;
the first pawl is provided with a first stopping end and a first exposed end, wherein the first stopping end is used for extending into the jack to be matched with the first ratchet in a clockwise stopping mode, and the first exposed end is exposed outside the cylinder wall to force the first pawl to rotate when being pressed by external force;
the second pawl is provided with a second stopping end and a second exposed end, wherein the second stopping end is used for extending into the jack to be matched with the second ratchet in a stopping manner in the anticlockwise direction, and the second exposed end is exposed outside the cylinder wall to force the second pawl to rotate when being pressed by external force;
three station operating device still includes:
and the linkage structure is linked with the output shaft or the worm so as to synchronously act along with the action of the output shaft or the worm, and presses the first exposed end or the second exposed end when the rotation angle of the output shaft or the worm reaches a set value, so that the second handle part and the first handle part are in idle running fit in the clockwise direction or the anticlockwise direction.
The beneficial effects of the above technical scheme are that: the first handle part and the second handle part are connected in an inserting and matching mode through a plug and a jack, a first ratchet and a second ratchet are arranged on the plug, a first pawl and a second pawl are hinged to the wall of the sleeve, the first pawl is provided with a first stopping end and a first exposing end, and the second pawl is provided with a second stopping end and a second exposing end; or when the second handle part is rotated anticlockwise, the second stopping end is matched with the second ratchet in a stopping manner in the anticlockwise direction, so that the second handle part drives the first handle part to synchronously rotate anticlockwise, the worm is driven to rotate anticlockwise through the connecting structure on the first handle part, and finally the output shaft drives the moving contact to reversely move through the transmission of the worm and the worm wheel.
The three-station operating mechanism further comprises a linkage structure which is linked with the output shaft or the worm, the linkage structure synchronously acts along with the action of the output shaft or the worm, when the rotation angle of the output shaft or the worm reaches a set value, the first exposed end or the second exposed end can be pressed, the first pawl or the second pawl can be rotated, the stop matching relation between the first stop end and the first ratchet or between the second stop end and the second ratchet is released, the second handle part and the first handle part are in idle rotation matching in the clockwise direction or the anticlockwise direction, the second handle part can not be driven to act by continuously rotating the second handle part, namely, the worm can not be driven to rotate any more, and the mechanical damages such as worm damage, static contact damage and the like can be avoided.
In addition, because the first elastic part is arranged between the first pawl and the cylinder wall, and the second elastic part is arranged between the second pawl and the cylinder wall, when the second handle part rotates reversely, the linkage structure releases the pressing on the first exposed end or the second exposed end, and then the first pawl or the second pawl can reset under the action of the first elastic part or the second elastic part, so that the handle can be repeatedly used.
Furthermore, the linkage structure comprises a cam arranged on the output shaft, a swing plate matched with the cam and a moving plate matched with the swing plate, wherein a curved surface with gradually reduced curvature is arranged on the cam, one end of the swing plate is hinged to the rack, the other end of the swing plate is in transmission fit with the moving plate, a small hole in jacking fit with the curved surface of the cam and a large hole for avoiding the curved surface are arranged on the swing plate, so that the cam drives the swing plate to rotate through jacking fit with the small hole in the rotating process, the swing plate drives the moving plate to move along the radial direction of the sleeve, and the first exposed end or the second exposed end is jacked.
The beneficial effects of the above technical scheme are that: the linkage structure is convenient to process, install and use.
Further, the moving plate comprises a plate body and a moving cylinder fixed on the plate body, and the moving cylinder is sleeved outside the sleeve and used for pressing the first exposed end or the second exposed end.
The beneficial effects of the above technical scheme are that: the first exposed end or the second exposed end is pressed through the movable barrel, so that the pressing operation is convenient.
Furthermore, a first mounting hole for mounting a first pawl is formed in the cylinder wall, and the size of the first mounting hole is larger than that of the first pawl, so that a first stop end and a first exposed end of the first pawl can rotate into the first mounting hole; the cylinder wall is further provided with a second mounting hole for mounting a second pawl, and the size of the second mounting hole is larger than that of the second pawl, so that a second stopping end and a second exposing end of the second pawl can rotate into the second mounting hole.
The beneficial effects of the above technical scheme are that: through setting up the first mounting hole and the second mounting hole of great size, make things convenient for the installation of first pawl and second pawl, first keep off end and first end, second keep off end and second and expose the end homoenergetic and rotate to corresponding mounting hole in, conveniently remove the locking.
Furthermore, a first stop plate for preventing the first pawl from rotating anticlockwise is fixed at the orifice of the first mounting hole; and a second stop plate for preventing the second pawl from rotating clockwise is fixed at the opening of the second mounting hole.
The beneficial effects of the above technical scheme are that: the first pawl and the second pawl are conveniently stopped through the stop plate, and the processing and the assembly are convenient.
Further, the first pawl and the second pawl are symmetrically arranged at 180 degrees.
The beneficial effects of the above technical scheme are that: the first exposed end or the second exposed end is pressed by the linkage structure conveniently, and idle rotation matching of the second handle part and the first handle part is achieved.
Furthermore, a first ratchet wheel and a second ratchet wheel which are coaxial with the plug are mounted on the plug, the first ratchet wheel is formed by gear teeth of the first ratchet wheel, and the second ratchet wheel is formed by gear teeth of the second ratchet wheel.
The beneficial effects of the above technical scheme are that: the ratchet wheel has more gear teeth, so that the ratchet wheel can conveniently form a stop matching relation with the first pawl or the second pawl.
Further, a first exposed end of the first pawl is provided with a first arc surface; the second exposed end of the second pawl is provided with a second arc surface.
The beneficial effects of the above technical scheme are that: the arc surface is convenient for the linkage structure to press the first exposed end or the second exposed end, so that the friction force is reduced.
Furthermore, the operating handle also comprises a connecting rod fixedly connected with the second handle part and a crank fixedly connected with the connecting rod.
The beneficial effects of the above technical scheme are that: the operating handle is rotated through the connecting rod and the crank, so that labor is saved, and the operation is convenient.
Drawings
FIG. 1 is a partial structural view (one view) of a three-position operating mechanism according to the present invention;
FIG. 2 is a partial block diagram (another perspective) of the three-position operating mechanism of the present invention;
FIG. 3 is a structural view of an operating handle of the three-position operating mechanism of the present invention;
FIG. 4 is an exploded view of the operating handle of the three-position operating mechanism of the present invention;
FIG. 5 is a structural view of a first handle portion of the operating handle of the three-position operating mechanism of the present invention;
FIG. 6 is a view showing the configuration of the first handle portion and the second handle portion of the operating handle of the three-position operating mechanism of the present invention;
FIG. 7 is a cross-sectional view of the first detent portion of the first and second handle portions of the operating handle of the three-position operating mechanism of the present invention;
fig. 8 is a cross-sectional view of a first pawl portion of a first handle portion of an operating handle of a three-position operating mechanism of the present invention.
In the figure: 1. an output shaft; 2. a worm; 3. a swing plate; 3-1, small holes; 3-2, macropore; 4. moving the plate; 4-1, a plate body; 4-2, moving the cylinder; 4-3, a groove; 5. a cam; 5-1, curved surface; 6. a first handle portion; 6-1, hexagonal axis; 6-2, sleeve; 6-2-1, a first mounting hole; 6-2-2 and a second mounting hole; 6-2-3, a first stop plate; 6-2-4, a second stop plate; 7. a second handle portion; 7-1, a plug; 7-1-1, convex column; 8. a connecting rod; 9. a crank; 10. a bearing; 11. a first ratchet wheel; 12. a second ratchet wheel; 13. a first pawl; 14. a second pawl; 15. a first spring; 16. a second spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
One embodiment of the three-position operating mechanism of the present invention is shown in fig. 1 and 2, and comprises a mechanism body and an operating handle, wherein the mechanism body comprises: the device comprises a rack (not shown in the figure), an output shaft 1, a worm wheel (not shown in the figure) and a worm 2, wherein the output shaft 1 is installed on the rack and used for driving a moving contact (not shown in the figure) to switch among three stations of closing, isolating and grounding. The worm wheel is mounted on the output shaft 1 and rotates synchronously with the output shaft 1. The worm 2 is arranged on the rack, is in transmission fit with the worm wheel and is used for driving the worm wheel to rotate.
As shown in fig. 1, 2, 3 and 4, the operating handle includes a first handle portion 6 and a second handle portion 7, the first handle portion 6 is provided with a connecting structure for connecting with the worm 2 in a rotation-stop manner, and as shown in fig. 5 and 6, the connecting structure in this embodiment is a hexagonal shaft 6-1. The second handle part 7 is connected with the first handle part 6 in an inserting and matching mode, a sleeve 6-2 is arranged on the first handle part 6, a plug 7-1 is arranged on the second handle part 7, and an inner hole of the sleeve 6-2 forms a jack for inserting the plug 7-1. The plug 7-1 is provided with a convex column 7-1-1, a first ratchet wheel 11 and a second ratchet wheel 12 which are coaxial with the plug 7-1 are fixed on the convex column 7-1-1, gear teeth on the first ratchet wheel 11 form first ratchet teeth, gear teeth on the second ratchet wheel 12 form second ratchet teeth, and the circumferential arrangement directions of the first ratchet teeth and the second ratchet teeth are opposite. As shown in fig. 4 and 6, a bearing 10 is installed between the plug 7-1 and the sleeve 6-2.
As shown in fig. 5, 6, 7 and 8, the wall of the sleeve 6-2 is hinged with a first pawl 13 and a second pawl 14, and the first pawl 13 and the second pawl 14 are symmetrically arranged at 180 degrees. Specifically, a first mounting hole 6-2-1 for mounting the first pawl 13 is formed in the wall of the sleeve 6-2, and a first stop plate 6-2-3 for preventing the first pawl 13 from rotating anticlockwise is fixed at the opening of the first mounting hole 6-2-1. The first pawl 13 has a first stopping end (as shown in fig. 7) for extending into the insertion hole to stop and match with the first ratchet in the clockwise direction, and a first exposed end simultaneously exposed outside the cylinder wall to force the first pawl 13 to rotate when being pressed by an external force, and the size of the first mounting hole 6-2-1 is larger than that of the first pawl 13, so that the first stopping end and the first exposed end of the first pawl 13 can rotate into the first mounting hole 6-2-1. A first elastic member is arranged between the first exposed end and the cylinder wall, and the first elastic member in this embodiment is a first spring 15. In addition, in order to be pressed, the first exposed end is provided with a first arc surface, namely the outer surface of the first exposed end is an arc surface.
Meanwhile, a second mounting hole 6-2-2 for mounting the second pawl 14 is further formed in the cylinder wall, and a second stop plate 6-2-4 for preventing the second pawl 14 from rotating clockwise is fixed at an opening of the second mounting hole 6-2-2. The second pawl 14 is provided with a second stopping end which is used for extending into the insertion hole to be matched with the second ratchet in a stopping way in the anticlockwise direction, and a second exposed end which is simultaneously exposed outside the cylinder wall to force the second pawl 14 to rotate when being pressed by external force, and the size of the second mounting hole 6-2-2 is larger than that of the second pawl 14, so that the second stopping end and the second exposed end of the second pawl 14 can rotate into the second mounting hole 6-2-2. A second elastic member is arranged between the second exposed end and the cylinder wall, and the second elastic member in this embodiment is a second spring 16. In addition, in order to be pressed, the second exposed end is provided with a second arc surface, namely the outer surface of the second exposed end is an arc surface.
As shown in fig. 1 to 4, the operating handle further includes a connecting rod 8 fixedly connected to the second handle portion 7 and a crank handle 9 fixedly connected to the connecting rod 8, and the second handle portion 7 can be rotated conveniently by the crank handle 9.
As shown in fig. 1 and 2, the three-position operating mechanism further includes a linkage structure, the linkage structure is linked with the output shaft 1 to synchronously move along with the movement of the output shaft 1, and presses the first exposed end or the second exposed end when the rotation angle of the output shaft 1 reaches a set value, so that the second handle portion 7 and the first handle portion 6 are in idle rotation fit in a clockwise direction or a counterclockwise direction.
Specifically, the linkage structure comprises a cam 5 installed on an output shaft 1, a swing plate 3 matched with the cam 5 and a moving plate 4 matched with the swing plate 3, wherein the cam 5 rotates synchronously with the output shaft 1, a curved surface 5-1 with gradually reduced curvature is arranged on the cam 5, one end of the swing plate 3 is hinged on the rack, the other end of the swing plate 3 is in transmission fit with the moving plate 4, a matching hole located outside the cam 5 is arranged on the swing plate 3, and the matching hole comprises a small hole 3-1 in jacking fit with the curved surface 5-1 of the cam 5 and a large hole 3-2 used for avoiding the curved surface 5-1. The smallest curvature part of the curved surface 5-1 can press the hole wall of the small hole 3-1 in the rotating process, as shown in the state of fig. 1, the smallest curvature part of the curved surface 5-1 is in contact with the hole wall of the small hole 3-1 after the cam 5 rotates anticlockwise, and then when the cam 5 continues to rotate anticlockwise, the swinging plate 3 is pushed to swing clockwise. Conversely, when the cam 5 rotates clockwise, the minimum curvature part of the curved surface 5-1 is slowly separated from the hole wall of the small hole 3-1 along with the rotation of the cam 5, and after the rotation of 180 degrees, the minimum curvature part contacts the hole wall of the small hole 3-1 again, and then the rotation of the cam 5 can push the swinging plate 3 to swing anticlockwise. The function of the big hole 3-2 is to allow part of the entity of the cam 5 to enter into it, ensuring the smooth rotation of the cam 5.
The moving plate 4 comprises a plate body 4-1 and a moving cylinder 4-2 fixed on the plate body 4-1, and the moving cylinder 4-2 is sleeved outside the sleeve 6-2 of the first handle part 6 and used for pressing the first exposed end or the second exposed end. The plate body 4-1 is L-shaped, the movable barrel 4-2 is fixed with the vertical edge of the plate body 4-1, the swinging plate 3 is matched with the transverse edge of the plate body 4-1, particularly, the transverse edge of the plate body 4-1 is provided with the groove 4-3, the semicircular end part of the swinging plate 3 extends into the groove 4-3, the arc surface of the semicircular end part is in jacking fit with the groove wall of the groove 4-3, when the swinging plate 3 swings, the plate body 4-1 can be pushed to move along the radial direction of the first handle part 6, certainly, in order to facilitate the translation of the plate body 4-1, a guide structure needs to be arranged on the rack, the guide structure can be a guide rail, a guide groove and the like, and the extending direction of the guide rail and the guide groove is the radial direction of the first handle part 6.
The working principle of the three-station operating mechanism is as follows:
when the operation handle is used, the operation handle is connected with the worm 2, the first handle part 6 of the operation handle penetrates through the movable barrel 4-2, the second handle part 7 is rotated through the crank 9, when the first ratchet wheel 11 rotates in the clockwise direction as shown in fig. 7, the first ratchet of the first ratchet wheel 11 is in stop fit with the first pawl 13 in the clockwise direction, namely the first ratchet wheel 11 is locked with the first pawl 13, so that the first handle part 6 is driven to synchronously rotate clockwise through the first pawl 13, the worm 2, the worm wheel, the output shaft 1 and the cam 5 are driven to rotate, when the rotation angles of the output shaft 1 and the worm 2 reach a set value, the cam 5 presses the swinging plate 3 to swing, the swinging plate 3 drives the movable plate 4 to move along the radial direction of the sleeve 6-2 of the first handle part 6, the movable barrel 4-2 presses the first exposed end, and the first pawl 13 is forced to rotate clockwise, the first pawl 13 rotates into the first mounting hole 6-2-1 to release the locking with the first ratchet wheel 11, so that the second handle part 7 is in idle running fit with the first handle part 6, the first handle part 6 cannot be driven to move when the second handle part 7 is continuously rotated, namely, the worm cannot be continuously driven to rotate, and the mechanical damage such as worm damage, static contact damage and the like can be avoided.
Of course, in order to ensure that the first pawl 13 can be unlocked from the first ratchet wheel 11, the angle of the ratchet groove of the first ratchet is important, and under the condition that the first ratchet wheel 11 and the first pawl 13 can be locked, it is also required to satisfy the condition that the first pawl 13 can slide across the surface of the first ratchet to realize clockwise rotation under a certain external force, and the angle of the ratchet groove of the first ratchet shown in fig. 7 is 90 degrees.
When the second handle part 7 rotates reversely, the second ratchet wheel 12 and the second pawl 14 are locked, so that the second handle part 7 drives the first handle part 6 to rotate synchronously, the cam 5 rotates reversely, the moving cylinder 4-2 is far away from the first exposed end, the first pawl 13 resets under the action of the first spring 15, finally, when the rotating angle of the output shaft 1 reaches a set value, the cam 5 presses the swinging plate 3 to swing reversely, the moving cylinder 4-2 presses the second exposed end, the second pawl 14 and the second ratchet wheel 12 are unlocked, the first handle part 6 and the second handle part 7 are in idle running fit, the worm cannot rotate any more, and the mechanical damages such as worm damage and static contact damage are avoided.
In other embodiments of the three-position operating mechanism, the operating handle does not include a connecting rod and a crank handle, and the second handle portion can be directly rotated.
In other embodiments of the three-position operating mechanism, the outer surfaces of the first exposed end of the first pawl and the second exposed end of the second pawl may not be circular arc surfaces.
In other embodiments of the three-position operating mechanism, the first ratchet teeth are not formed by the teeth of the first ratchet wheel, and the second ratchet teeth are not formed by the teeth of the second ratchet wheel, but the first ratchet teeth and the second ratchet teeth are directly welded and fixed on the plug.
In other embodiments of the three-position operating mechanism, the first pawl and the second pawl may not be 180 degrees symmetrically arranged, depending on the angle of rotation of the output shaft and the particular form of the linkage.
In other embodiments of the three-position operating mechanism, the first stop plate and the second stop plate are integrally arranged on the cylinder wall.
In other embodiments of the three-position operating mechanism, the first pawl can be unlocked from the first ratchet without rotating into the first mounting hole by the size design of the sleeve, and similarly, the second pawl is also the same, and the sizes of the first mounting hole and the second mounting hole arranged on the cylinder wall do not need to be larger than the sizes of the corresponding pawls.
In other embodiments of the three-position operating mechanism, the moving plate may only include a plate body, a through hole through which the first handle passes is provided on the plate body, and the first exposed end or the second exposed end is directly pressed by a hole wall of the through hole.
In other embodiments of the three-position operating mechanism, the linkage structure may also be linked with a worm.
In other embodiments of the three-position operating mechanism, the linkage structure may not be in the form of a cam, a swing plate and a moving plate, for example, the linkage structure is a linkage plate connected to the output shaft or the worm, the linkage plate is directly provided with a pressing structure pressing against the first exposed end or the second exposed end along with synchronous forward rotation or reverse rotation of the output shaft or the worm, and the pressing structure presses against the first exposed end or the second exposed end when the output shaft or the worm rotates in place.
In other embodiments of the three-position operating mechanism, the attachment structure on the first handle portion may also be a hexagonal hole.
In other embodiments of the three-position operating mechanism, the plug may be disposed on the first handle portion, and the sleeve may be disposed on the second handle portion, such that when the sleeve of the second handle portion rotates, the first handle portion is driven to rotate by the cooperation of the first pawl and the first ratchet or the cooperation of the second pawl and the second ratchet.
In other embodiments of the three-position operating mechanism, the first elastic member and the second elastic member may also be elastic sheets or rubber.
The embodiment of the three-position switch in the utility model is as follows: the three-position switch comprises a switch body and a three-position operating mechanism, and the specific structure of the three-position operating mechanism is the same as that of the three-position operating mechanism in the embodiment, and is not repeated here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. The three-station operating mechanism is characterized by comprising a mechanism body and an operating handle;
wherein, the mechanism body includes:
a frame;
the output shaft (1) is arranged on the rack and used for driving the moving contact to switch among three stations of closing, isolating and grounding;
the worm wheel is arranged on the output shaft (1) and rotates synchronously with the output shaft (1);
the worm (2) is arranged on the rack, is in transmission fit with the worm wheel and is used for driving the worm wheel to rotate;
wherein, operating handle includes:
the first handle part (6), the first handle part (6) is provided with a connecting structure for the rotation stopping connection with the worm (2);
the second handle part (7) is connected with the first handle part (6) in an inserting and matching mode, one of the first handle part (6) and the second handle part (7) is provided with a plug, the other handle part is provided with a sleeve, an inner hole of the sleeve forms a jack for inserting the plug, the plug is provided with a first ratchet and a second ratchet, and the wall of the sleeve is hinged with a first pawl (13) and a second pawl (14);
the first pawl (13) is provided with a first stop end and a first exposed end, wherein the first stop end is used for extending into the jack to be matched with the first ratchet in a clockwise stop mode, and the first exposed end is exposed outside the cylinder wall to force the first pawl (13) to rotate when being pressed by external force;
a second elastic piece is arranged between the second pawl (14) and the cylinder wall, and the second pawl (14) is provided with a second stopping end which is used for extending into the jack to be matched with the second ratchet in a stopping way in the anticlockwise direction and a second exposed end which is simultaneously exposed outside the cylinder wall to force the second pawl (14) to rotate when being pressed by external force;
three station operating device still includes:
and the linkage structure is linked with the output shaft (1) or the worm (2) to synchronously act along with the action of the output shaft (1) or the worm (2), and presses the first exposed end or the second exposed end when the rotation angle of the output shaft (1) or the worm (2) reaches a set value, so that the second handle part (7) and the first handle part (6) are in idle running fit in the clockwise direction or the anticlockwise direction.
2. The three-station operating mechanism according to claim 1, wherein the linkage structure comprises a cam (5) mounted on the output shaft (1), a swing plate (3) matched with the cam (5), and a moving plate (4) matched with the swing plate (3), the cam (5) is provided with a curved surface (5-1) with gradually reduced curvature, one end of the swing plate (3) is hinged on the frame, the other end of the swing plate is in transmission fit with the moving plate (4), the swing plate (3) is provided with a small hole (3-1) in jacking fit with the curved surface (5-1) of the cam (5) and a large hole (3-2) for avoiding the curved surface (5-1), so that the cam (5) is matched with the small hole (3-1) in jacking fit to drive the swing plate (3) to rotate in the rotating process, and the swing plate (3) drives the moving plate (4) to move along the radial direction of the sleeve, so as to press the first exposed end or the second exposed end.
3. The three-station operating mechanism as claimed in claim 2, wherein the moving plate (4) comprises a plate body (4-1) and a moving cylinder (4-2) fixed on the plate body (4-1), and the moving cylinder (4-2) is sleeved outside the sleeve and used for pressing the first exposed end or the second exposed end.
4. The three-station operating mechanism as claimed in any one of claims 1 to 3, wherein a first mounting hole for mounting the first pawl (13) is formed in the cylinder wall, and the size of the first mounting hole is larger than that of the first pawl (13), so that the first stop end and the first exposed end of the first pawl (13) can rotate into the first mounting hole; the cylinder wall is also provided with a second mounting hole for mounting a second pawl (14), and the size of the second mounting hole is larger than that of the second pawl (14), so that a second stopping end and a second exposed end of the second pawl (14) can rotate into the second mounting hole.
5. The three-position operating mechanism as claimed in claim 4, characterized in that a first stop plate for preventing the first pawl (13) from rotating anticlockwise is fixed at the opening of the first mounting hole; a second stop plate for preventing the second pawl (14) from rotating clockwise is fixed at the opening of the second mounting hole.
6. A three-position operating mechanism according to any one of claims 1 to 3, wherein the first pawl (13) and the second pawl (14) are arranged 180 ° symmetrically.
7. A three-position operating mechanism according to any one of claims 1 to 3, wherein the spigot is provided with a first ratchet wheel (11) and a second ratchet wheel (12) which are coaxial with the spigot, the first ratchet wheel being formed by the teeth of the first ratchet wheel (11) and the second ratchet wheel being formed by the teeth of the second ratchet wheel (12).
8. The three-station operating mechanism according to any one of claims 1 to 3, wherein a first exposed end of the first pawl (13) is provided with a first arc surface; the second exposed end of the second pawl (14) is provided with a second arc surface.
9. A three-position operating mechanism according to any one of claims 1 to 3, wherein the operating handle further comprises a connecting rod (8) fixedly connected to the second handle portion (7) and a crank (9) fixedly connected to the connecting rod (8).
10. A three-position switch comprises a switch body and a three-position operating mechanism, and is characterized in that the three-position operating mechanism is the same as the three-position operating mechanism in any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121897160.2U CN216084701U (en) | 2021-08-13 | 2021-08-13 | Three-station operating mechanism and three-station switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121897160.2U CN216084701U (en) | 2021-08-13 | 2021-08-13 | Three-station operating mechanism and three-station switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216084701U true CN216084701U (en) | 2022-03-18 |
Family
ID=80669639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121897160.2U Active CN216084701U (en) | 2021-08-13 | 2021-08-13 | Three-station operating mechanism and three-station switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216084701U (en) |
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2021
- 2021-08-13 CN CN202121897160.2U patent/CN216084701U/en active Active
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