CN211742950U - Drawing emergency stop switch - Google Patents
Drawing emergency stop switch Download PDFInfo
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- CN211742950U CN211742950U CN201922354266.7U CN201922354266U CN211742950U CN 211742950 U CN211742950 U CN 211742950U CN 201922354266 U CN201922354266 U CN 201922354266U CN 211742950 U CN211742950 U CN 211742950U
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- central shaft
- sleeve
- boss
- pull
- axial direction
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Abstract
There is provided a pull emergency stop switch comprising: a central shaft having a through hole radially penetrating the central shaft; the pressure spring is arranged in the through hole; the central shaft can move in the sleeve along the axial direction of the sleeve, a boss is arranged on the inner wall of the sleeve, after the central shaft is installed in the sleeve, the circumferential position of the through hole of the central shaft corresponds to the circumferential position of the boss on the inner wall of the sleeve, blocking pieces are respectively arranged at two ends of the pressure spring, the size of each blocking piece is designed to be capable of entering and exiting the through hole, and the pressure spring pushes the blocking pieces out of the through hole in a natural state.
Description
Technical Field
The utility model relates to a switch, more specifically relates to a draw scram switch.
Background
The pull emergency stop switch is one of master control electric appliances, and when the machine is in a dangerous state or any other state needing to immediately stop the machine, the machine can be stopped by pressing the pull emergency stop switch to the terminal position. And the pull emergency stop switch is in a locking state after being pressed down, and can be reset only by pulling out the pull emergency stop switch with force from the pull head, so that the pull emergency stop switch cannot be reset by itself after being pressed down and cannot be reset due to mistaken touch.
There is a need for a pull scram switch that is reliable in locking and easy to reset.
SUMMERY OF THE UTILITY MODEL
The utility model provides a reliable and easy drawing scram switch that resets.
In at least one embodiment, the utility model discloses a rotatory scram switch includes:
a central shaft having a through hole radially penetrating the central shaft;
the pressure spring is arranged in the through hole;
the central shaft can move in the sleeve along the axial direction of the sleeve, the inner wall of the sleeve is provided with a boss, and after the central shaft is arranged in the sleeve, the circumferential position of the through hole of the central shaft corresponds to the axial position of the boss on the inner wall of the sleeve;
wherein, two ends of the pressure spring are respectively provided with a stopper, and the size of the stopper is designed to be capable of entering and exiting the through hole;
and the stopper is pushed out of the through hole by the pressure spring in a natural state.
In some embodiments, the boss is sloped on both the upper and lower sides in the axial direction such that the central shaft cannot rest in a position where the stop is radially against the upper or lower side of the boss without intervention of an external force.
In some embodiments, the boss is a circular arc boss and the stop is a sphere.
In some embodiments, the diameter of the ball is greater than the inner diameter of the compression spring so that the stop does not enter the compression spring due to a weak attachment therebetween.
In some embodiments, the pull emergency stop switch of the present invention further comprises a pull head detachably mounted on top of the central shaft.
In some embodiments, the drawing head is provided with an abutment below it and the sleeve is provided with a stop at its upper end, the abutment and the stop being capable of abutting as the drawing head and the sleeve move in the axial direction, thereby axially limiting the central shaft.
In some embodiments, the pull emergency stop switch of the present invention further comprises a pressing block, and wherein the upper surface of the pressing block is provided with two limiting protrusions radially and oppositely, and the lower end of the central shaft is provided with two clamping grooves radially and oppositely, the pressing block and the central shaft are fitted to each other by the embedding fit between the limiting protrusions and the clamping grooves, and the pressing block is fixed to the central shaft by screws;
the periphery of the pressing block is provided with a limiting boss, the inner wall of the sleeve is provided with a limiting step extending along the axial direction, and the limiting boss and the limiting step can abut against each other along with the movement of the central shaft in the axial direction so as to limit the central shaft to further move upwards in the axial direction;
and the surface of the lower shaft body of the central shaft is provided with positioning grooves which extend along the axial direction in a radial direction, and the axial rotation of the central shaft is limited by the embedded matching between the positioning grooves and the limiting steps.
In some embodiments, the utility model discloses a draw scram switch further includes the sealing washer, and this sealing washer setting has strengthened drawing scram switch's sealing performance at the sleeve with draw the composition surface department of head.
In some embodiments, the sleeve is provided at its upper end with a mounting guide having an upper end radius greater than its lower end radius and a smooth slope in the axial direction from the upper end to the lower end so that the ball stop can enter the sleeve smoothly when mounted.
The utility model provides a draw scram switch simple structure utilizes spacing realization locking and reseing between two spheroid fenders piece and the sleeve boss. And the upper end of the sleeve is also provided with an installation guide part, so that the installation process is simpler and more convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings which are needed to be used in the embodiments will be briefly described below, and the drawings which are described below are some embodiments of the present invention.
FIG. 1 is an exploded view of an example pull scram switch according to an embodiment;
FIG. 2 is a side exploded view of the sleeve 24, central shaft 14, and press block 202 of an example pull scram switch according to an embodiment;
3A-3D are cross-sectional views of an example pull scram switch in an initial position, according to an embodiment;
fig. 4A-4D are cross-sectional views of an example pull scram switch in a pressed bottom position, according to an embodiment.
Fig. 5A-5B are cross-sectional views of the example pull scram switch of fig. 4B-4C with the addition of a waterproof ring, according to an embodiment.
Detailed Description
The technical solution of the present invention will be described more clearly and completely with reference to the accompanying drawings, and the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts will fall into the protection scope of the present invention.
In the description of the present invention, the terms "upper", "lower", "left", "right", "axial", "radial", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present invention.
Furthermore, unless otherwise indicated, the terms "attached," "mounted," "connected," and the like are to be construed broadly and their meanings in the present disclosure may be understood as appropriate by those skilled in the art.
The utility model discloses a draw scram switch utilizes pressure spring 16, keeps off piece 18 and designs the cooperation of the boss 248 on the sleeve 24 inner wall to realize stable locking and reset.
FIG. 1 is an exploded view of an example pull scram switch according to an embodiment. Referring to fig. 1, the pull emergency stop switch of the present embodiment includes a center shaft 14, a compression spring 16, and a sleeve 24. The central shaft 14 has a through hole radially penetrating the central shaft 14. A compression spring 16 is mounted radially within the through bore along the central axis 14. The central shaft 14 is movable within the sleeve 24 in the axial direction of the sleeve 24. Two bosses 248 are provided on the inner wall of the sleeve 24 such that, after the central shaft 14 is fitted into the sleeve 24, the circumferential position of the through-hole of the central shaft 14 corresponds to the circumferential position of the bosses 248 on the inner wall of the sleeve 24.
In at least one embodiment, the boss 248 has a slope on both the upper and lower sides in the axial direction of the sleeve 24 such that the central shaft 14 cannot stay in a position radially against the stop 18 and the upper or lower side of the boss 248 without intervention of an external force. In some embodiments, the protrusion 248 is a circular arc protrusion, and the stopper 18 is a sphere, so that the stopper 18 and the circular arc protrusion 248 move smoothly relative to each other. In at least one embodiment, the diameter of the spherical stop 18 can be greater than the inner diameter of the compression spring.
The pull emergency stop switch further includes a pressing piece 20, which is fixedly attached to the bottom of the central shaft 14 by a screw 22 so as to be movable together with the central shaft 14. The locating projections 204 and 202 on the pressure block 20 limit the movement of the pressure block and the central shaft, the details of which will be described below.
In some embodiments, the pull emergency stop switch further comprises a pull head 10, which pull head 10 may be threaded to removably engage an upper portion of the central shaft 14.
In some embodiments, the pull scram switch may include a sealing ring 12, the sealing ring 12 being disposed at the interface of the sleeve 24 and the pulling head 10 to ensure a seal at the interface.
FIG. 2 is a side exploded view of the sleeve 24, the central shaft 14, and the press block 20 of an example pull scram switch according to an embodiment. As shown in FIG. 2, the inner wall of the sleeve 24 is provided with an axially extending stop step 244. In at least one embodiment, the stop step 244 extends to the lower end of the sleeve 24. The outer side of the lower shaft body of the central shaft 14 is provided with axially extending positioning grooves 142 diametrically opposite. The axial rotation of the center shaft 14 can be restricted by the fitting engagement of the positioning groove 142 with the restricting step 244.
The lower end of the central shaft 14 is also provided with a clamping groove 144 in a radial opposite manner, and the upper surface of the pressing block 20 is correspondingly provided with a positioning lug 204. The rotation of the pressing piece 20 relative to the central shaft 14 can be restricted by the fitting engagement of the positioning projection 204 with the catching groove 144.
The pressing block 20 is further provided with a positioning boss 202 extending radially outward in the circumferential direction. When the drawing head 10 is pulled upward, the press piece 20 moves upward with the central shaft 14 and the drawing head 10 relative to the sleeve 24 until the positioning boss 202 of the press piece 20 abuts against the limit step 244. At this time, the pulling head 10 cannot be pulled any more, and the central shaft 14 is restricted from moving upward in the axial direction.
In some embodiments, the pull emergency stop switch further comprises a rubber gasket 26 and a fastening ring 28, the rubber gasket 26 is located at the interface between the fastening ring 28 and the sleeve 24, the sleeve 24 is more stably combined with the pull emergency stop switch structure from the lower end of the sleeve 24, and the rubber gasket 26 can also play a certain role in damping vibration.
Fig. 3A-3D are cross-sectional views of an example pull scram switch in an initial position, according to an embodiment. Referring to FIG. 3A, the seal ring 12 is at the interface of the draw head 10 and the sleeve 24, and the cooperation between the snap edge 122 of the seal ring 12 and the draw head 10 achieves a sealing effect between the draw head 10 and the sleeve 24. Fig. 4A-4D are cross-sectional views of an example pull scram switch in a pressed bottom position, according to an embodiment. The process of pressing and resetting an example pull emergency stop switch according to an embodiment will be explained in detail below with reference to fig. 3A-4D and fig. 4A-4D.
Referring to fig. 3A-3D or 4A-4D, in some embodiments, the upper end of the sleeve 24 is also provided with a mounting guide 242, the mounting guide 242 having an upper end radius greater than a lower end radius thereof, and the mounting guide 242 being smoothly sloped in the axial direction from the upper end to the lower end.
In installing the example pull emergency stop switch according to the embodiment, the ball stopper 18 and the compression spring 16 are first installed in the through hole of the center shaft 14, and then the center shaft 14 together with the stopper 18 and the compression spring 16 is installed in the sleeve 24. In this process, the pressure spring 16 is initially in a natural state and pushes the stopper 18 out of the through hole, and as the stopper 18 contacts the mounting guide 242, the smooth slope of the mounting guide 242 in the axial direction will cause the stopper 18 to gradually move toward the axial center of the central shaft 14 through the mounting guide 242 and compress the pressure spring 16, so that the stopper 18 can smoothly pass through the mounting guide 242. The central shaft 14 then continues to move downwardly until the stop 18 reaches the upper side of the boss 248 of the sleeve 24 so that the stop 18 abuts the upper side of the boss 248 and does not pass over the boss 248. The central shaft 14 is now in the initial position.
When the pulling head of the pulling emergency stop switch is pressed downward, the center shaft moves downward from the initial position (refer to fig. 3A to 3D) until the bottom position (refer to fig. 4A to 4D) is pressed. At the initial stage of this movement, the stoppers 18 at both ends of the pressure spring 16 are in a state of being protruded from the through hole of the center shaft 14, and the stoppers 18 abut against the upper side of the boss 248. Since the boss 248 has slopes on both the upper and lower sides in the axial direction of the sleeve 24, and the slopes are designed such that the central shaft 14 cannot stay at a position where the stoppers 18 and the upper or lower side of the boss 248 radially abut against each other without intervention of an external force, the stoppers 18 will move along the sloped upper surface of the boss 248 toward the axis of the central shaft 14, causing the compression spring 16 to be compressed, and the stoppers 18 move toward the axis of the central shaft 14 along with both ends of the compression spring 16. When the pressing force is sufficiently great, the catch 18 will ride down over the boss 248 along the upper surface of the boss 248.
As the central shaft 14 continues to move downwardly relative to the sleeve 24, the compression spring 16 and the stop 18 move to the underside of the boss 248. Since the surface of the lower side of the boss 248 is also sloped, the pressure spring 16 is gradually restored, and the stopper 18 is pushed out of the through hole in a direction away from the axis of the center shaft 14 by the elastic force of the pressure spring 16 and abuts against the lower end of the boss 248. When the abutment 102 of the drawing head 10 abuts against the stopper 246 provided at the upper end of the sleeve 24 (refer to fig. 4A-4B), the drawing head 10 and the central shaft 14 cannot move further downward. At which time the stop 18 has moved below the boss 248.
In the case of attempting to reset the switch, it is necessary to move the central shaft 14 upward along the axial direction of the sleeve 24 by pulling the drawing head 10 upward. At this time, the stopper 18 abuts against the lower side of the boss 248 with a slope, and if there is not enough upward pulling force, the elastic force of the compression spring 16 and the slope of the boss 248 restrict the stopper 18 from moving further upward so that the center shaft 14 cannot move upward, and the pull emergency stop switch is held at the pressed bottom position.
When the upward pulling force applied to the drawing head 10 is sufficiently large, the pulling force overcomes the abutting force between the stopper 18 and the boss 248 due to the elastic force of the pressure spring 16 to move the stopper 18 upward in the axial direction of the sleeve 24, so that the central shaft 14 can move upward. The catch 18 will ride over the boss 248 and move further upward. At this time, the compression spring 16 is gradually restored along with the upper side surface with the slope of the boss 248, and the stopper 18 is pushed outward by the restoring force of the compression spring 16 until the limit step 244 provided at the lower end of the sleeve 24 abuts against the positioning boss 202 provided at the periphery of the pressing block 20, as shown in fig. 3A-3B. At this time, the center shaft 14 cannot move further upward in the axial direction of the sleeve 24, and the pull emergency stop switch is reset.
Referring to fig. 5A-5B, an example pull emergency stop switch according to an embodiment may further include a waterproof ring 30. The central shaft 14 is provided with a groove 146 circumferentially above the boss 248 in the body surface of the central shaft 14, in an axial position such that when the central shaft 14 is in the depressed bottom position, the groove 146 is also still above the boss 248. The waterproof ring 30 is arranged in the groove 146 and is abutted against the inner wall of the sleeve 24, so that water or dirt is prevented from entering a structure below the waterproof ring 30 from the sleeve 24, and the waterproof performance of the pull emergency stop switch is improved. It should be noted that the waterproof ring 30 may be attached or detached according to the performance requirements of the product. Under the condition that the waterproof ring 30 does not need to be additionally arranged, the groove 146 is vacant, and the use is not influenced.
The above examples are merely for clarity of illustration and are not intended to limit the embodiments. It will be apparent to those skilled in the art that other variations and modifications can be made on the basis of the foregoing description, and any obvious variations and modifications will still fall within the scope of the present invention.
Claims (9)
1. A pull emergency stop switch, comprising:
a central shaft (14), said central shaft (14) having a through hole extending radially through said central shaft (14);
the pressure spring (16), the said pressure spring (16) is installed in said through hole;
a sleeve (24), wherein the central shaft (14) can move in the sleeve (24) along the axial direction of the sleeve (24), a boss (248) is arranged on the inner wall of the sleeve (24), after the central shaft (14) is installed in the sleeve (24), the circumferential position of the through hole of the central shaft (14) corresponds to the circumferential position of the boss (248) on the inner wall of the sleeve (24),
stoppers (18) are respectively arranged at two ends of the pressure spring (16), and the size of each stopper (18) is designed to be capable of entering and exiting the through hole; and is
The pressing spring (16) pushes the stopper (18) out of the through hole in a natural state.
2. The pull scram switch of claim 1, wherein said boss (248) is sloped on both upper and lower sides in the axial direction such that said central shaft (14) cannot stay in a position where said stopper (18) and the upper or lower side of said boss (248) are radially abutted without intervention of external force.
3. The pull scram switch of claim 2, wherein said boss (248) is a circular arc boss and said catch (18) is a sphere.
4. The pull scram switch according to claim 3, characterized in that the diameter of the sphere is larger than the inner diameter of the compression spring (16).
5. The pull emergency stop switch according to claim 1, further comprising a pull head (10), the pull head (10) being removably mounted on top of the central shaft (14).
6. Drawing emergency stop switch according to claim 5, characterized in that the drawing head (10) is provided with an abutment (102) below it and the sleeve (24) is provided with a stop (246) at its upper end, the abutment (102) and the stop (246) being able to abut as the drawing head (10) and the sleeve (24) move in axial direction.
7. The pull emergency stop switch of claim 1, further comprising a press piece (20), wherein,
the upper surface of the pressing block (20) is provided with two limiting lugs (204) in a radial opposite mode, the lower end of the central shaft (14) is provided with two clamping grooves (144) in a radial opposite mode, the pressing block (20) is matched with the central shaft (14) through embedding fit between the limiting lugs (204) and the clamping grooves (144), and the pressing block (20) is fixed to the central shaft (14) through a screw (22);
the periphery of the pressing block is provided with a limiting boss (202), the inner wall of the sleeve is provided with a limiting step (244) extending axially, the limiting boss (202) and the limiting step (244) can abut against each other along with the axial movement of the central shaft (14), and further the central shaft (14) is limited to move upwards in the axial direction; and is
The surface of the lower shaft body of the central shaft (14) is provided with positioning grooves (142) which extend along the axial direction in a radial direction and oppositely, and the axial rotation of the central shaft (14) is limited by the embedded fit between the positioning grooves (142) and the limit steps (244).
8. The pull emergency stop switch of claim 1 further comprising a seal ring (12), the seal ring (12) being disposed at an interface of the sleeve (24) and the pull head (10).
9. The pull scram switch of claim 3, characterized in that said sleeve (24) is provided with a mounting guide (242) at its upper end, wherein said mounting guide (242) has an upper end radius larger than its lower end radius, and said mounting guide (242) is provided with a smooth slope in the axial direction from the upper end to the lower end, so that the ball stopper can enter the sleeve smoothly at the time of mounting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922354266.7U CN211742950U (en) | 2019-12-24 | 2019-12-24 | Drawing emergency stop switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922354266.7U CN211742950U (en) | 2019-12-24 | 2019-12-24 | Drawing emergency stop switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211742950U true CN211742950U (en) | 2020-10-23 |
Family
ID=72870717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922354266.7U Active CN211742950U (en) | 2019-12-24 | 2019-12-24 | Drawing emergency stop switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211742950U (en) |
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2019
- 2019-12-24 CN CN201922354266.7U patent/CN211742950U/en active Active
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