CN114709114A - Spring operating mechanism and speed characteristic adjusting method before assembly thereof - Google Patents
Spring operating mechanism and speed characteristic adjusting method before assembly thereof Download PDFInfo
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- CN114709114A CN114709114A CN202111565248.9A CN202111565248A CN114709114A CN 114709114 A CN114709114 A CN 114709114A CN 202111565248 A CN202111565248 A CN 202111565248A CN 114709114 A CN114709114 A CN 114709114A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/38—Driving mechanisms, i.e. for transmitting driving force to the contacts using spring or other flexible shaft coupling
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Abstract
The invention provides a spring operating mechanism and a speed characteristic adjusting method before assembly thereof, wherein the spring operating mechanism comprises a spring barrel, a spring arranged in the spring barrel and a buffer arranged on the inner side of the spring, a pressing plate is arranged at the upper end of the spring, the buffer comprises a piston rod, the upper end of the piston rod penetrates through the pressing plate and is connected with a pressing joint, the piston rod is connected with the pressing joint through a pin shaft, a first pin hole is arranged on the piston rod, a second pin hole is arranged on the pressing joint, an adjusting gasket is clamped between the pressing joint and the pressing plate, the adjusting gasket is sleeved outside the piston rod, and the second pin hole and the first pin hole can still be correspondingly communicated after the spring is compressed to a required precompression force so as to allow the pin shaft to pass through. The invention not only facilitates the installation of the pin shaft, but also ensures that the spring is compressed to the required precompression force, compared with the prior art, the adjusting gasket can not be separated, the precompression quantity of the spring can be kept unchanged, the adjusting effect is ensured to be unchanged, meanwhile, the installation of the adjusting gasket can not influence other parts, and the adjusting effect is better.
Description
Technical Field
The invention relates to the technical field of a spring operating mechanism of a circuit breaker, in particular to a spring operating mechanism and a speed characteristic adjusting method before assembly.
Background
The spring operating mechanism is an operating mechanism which takes a spring as a power element to carry out switching-on and switching-off operations on the switch equipment, and the stability of the switching-on and switching-off characteristics of the spring operating mechanism is one of important indexes for measuring the type of products, so that different manufacturers have specific requirements on switching-on and switching-off speed and time so as to meet the requirements on stability and safety in the switching-on and switching-off operations of the circuit breaker. Because the impulse of the spring operating mechanism is large, the speed fluctuation of opening and closing is large, and particularly for a mechanism of split-phase operation, the synchronism is difficult to guarantee, so that the stable speed characteristic of closing can be guaranteed by adjusting before assembly, and meanwhile, the compression amount of the split-phase operation can be strictly controlled so as to ensure that the speed of the split-phase operation cannot fluctuate too much.
To this, chinese utility model patent that the publication number is CN201629279U discloses a buffer that circuit breaker operating mechanism accelerates division speed, include separating brake spring shell (being the spring case) and set up the separating brake spring in the spring case, be equipped with the buffer in the separating brake spring, separating brake spring top is equipped with separating brake spring holder (being the clamp plate) and connecting block (being the crimping head), connect through the piston rod between buffer piston and crimping head and the clamp plate, make the clamp plate can compress separating brake spring, and the crimping head can drive piston rod and buffer piston reciprocating motion from top to bottom under the effect of operating mechanism pull rod.
When the speed characteristic of the operating mechanism is adjusted before assembly, the pressing degree of the pressing plate can be changed only by changing the fixing positions of the pressing head and the piston rod, but the pressing head and the piston rod are often fixedly connected, and the pressing head can be abutted to a step surface at the upper end of the piston rod when the pressing head cannot move downwards or move downwards relative to the piston rod, so that the initial compression amount of the spring cannot be adjusted.
In addition, chinese utility model patent that the publication number is CN201417685Y discloses a device of adjusting separating brake spring pre-compaction volume, including separating brake spring, briquetting (be the clamp plate) and double-layered fork (be the crimping head promptly for be connected with operating mechanism's pull rod transmission), be connected through screw thread spinning component between crimping head and the clamp plate, screw thread spinning component is including the screw rod that has worn gland nut, and the crimping head is connected to the one end of screw rod, the other end and the piston rod threaded connection who passes the clamp plate, and the outside threaded connection of screw rod has the thread bush. During assembly, the initial prepressing position of the opening spring is changed by spinning the threaded sleeve leftwards, so that the initial prepressing force of the spring is adjusted.
Although the position of the pressure plate can be changed by rotating the threaded sleeve and the precompression degree of the spring is adjusted, the threaded sleeve is easy to loosen due to factors such as vibration in the using process of the mechanism, the precompression amount of the spring cannot be stably kept, namely the adjusting effect is gradually lost, and the opening and closing speed characteristic is finally influenced. And the clamping fork and the piston rod are also in threaded connection, when the external threaded sleeve is rotated, the clamping fork on the inner side is also subjected to torque, the clamping fork can rotate along with the torque, the connection position precision of the clamping fork is influenced, and the adjusting effect is poor.
Disclosure of Invention
The invention aims to provide a spring operating mechanism, which aims to solve the problems that the adjusting effect of the pre-compression amount of a spring cannot be stably kept and the adjusting effect is poor in the prior art; the invention also aims to provide a method for adjusting the speed characteristic of the spring operating mechanism before assembly.
In order to achieve the purpose, the spring operating mechanism adopts the following technical scheme:
the spring operating mechanism comprises a vertically arranged spring barrel, a spring arranged inside the spring barrel and a buffer arranged on the inner side of the spring, wherein the upper end of the spring is provided with a pressing plate, the buffer comprises a piston rod, the upper end of the piston rod penetrates through the pressing plate and is connected with a crimping head, the crimping head is used for being in transmission connection with a pull rod of the spring operating mechanism, the piston rod is connected with the crimping head through a pin shaft, a first pin hole for the pin shaft to penetrate through is formed in the piston rod, a jack for inserting the upper end of the piston rod is formed in the crimping head, a second pin hole for the pin shaft to penetrate through is formed in the crimping head, an adjusting gasket is arranged between the lower end face of the crimping head and the upper end face of the pressing plate in a clamping mode, the adjusting gasket is sleeved outside the piston rod and used for enabling the second pin hole and the first pin hole to be correspondingly communicated after the spring is compressed to required precompression force so that the pin shaft penetrates through.
The beneficial effects of the above technical scheme are that: the piston rod is connected with the crimping head through a pin shaft, a first pin hole for the pin shaft to penetrate through is formed in the piston rod, an insertion hole for the upper end of the piston rod to insert into is formed in the crimping head, and a second pin hole for the pin shaft to penetrate through is formed in the crimping head, so that the piston rod and the crimping head can be conveniently assembled and connected; simultaneously, press joint's lower terminal surface and the up end of clamp plate between press from both sides and be equipped with adjusting shim, like this when the assembly, just can compress the spring to required precompression power earlier, at this moment first pinhole on the piston rod and the overhead second pinhole of press from both sides stagger from top to bottom, establish adjusting shim through the outside cover at the piston rod, with the press joint pad, just can compensate the dislocation between first pinhole and the second pinhole, make both correspond the intercommunication to the installation of round pin axle of being convenient for.
The spring operating mechanism enables the piston rod to be connected with the pressing connector through the pin shaft, and the adjusting gasket is clamped between the lower end face of the pressing connector and the upper end face of the pressing plate, so that the installation of the pin shaft is facilitated, and the spring is compressed to the required pre-compression force.
Furthermore, a stopping structure for stopping the end part of the pin shaft to prevent the pin shaft from being separated from the crimping head is fixed outside the crimping head.
The beneficial effects of the above technical scheme are that: the stopping structure fixed outside the press-connection head can be used for better preventing the pin shaft from being separated from the press-connection head, and the normal use of the spring operating mechanism is ensured.
Further, the stopping structure is a hose clamp or a cable tie.
The beneficial effects of the above technical scheme are that: convenient configuration, installation easy operation.
Furthermore, the outer peripheral surface of the pressure joint is provided with a ring groove for embedding the hose clamp or the ribbon.
The beneficial effects of the above technical scheme are that: the position of the hose clamp or the binding belt can be better limited, and the dislocation of the hose clamp or the binding belt is avoided.
Further, the adjusting gaskets are provided with at least two.
The beneficial effects of the above technical scheme are that: the second pin holes are easier to be correspondingly communicated with the first pin holes by stacking the adjusting gaskets, and the operation flexibility is higher.
Further, the thickness of at least two adjusting shims in each adjusting shim is unequal.
The beneficial effects of the above technical scheme are that: the adjusting gaskets with unequal thicknesses are used in a superposed mode, the sum of the thicknesses of all the adjusting gaskets can be more easily ensured to reach a required value, and the operation flexibility is higher.
Further, the crimping head includes the connecting cylinder of being connected with the piston rod and connects the otic placode of two parallel interval arrangements in the connecting cylinder upper end, and two otic placodes are used for being connected with the pull rod transmission of spring operating mechanism, jack and second pinhole all set up on the connecting cylinder.
The beneficial effects of the above technical scheme are that: the crimping head is simple in structure, convenient to machine and manufacture and convenient to be in transmission connection with a pull rod of the spring operating mechanism.
The method for adjusting the speed characteristic of the spring operating mechanism before assembly adopts the following technical scheme:
the method for adjusting the speed characteristic of the spring operating mechanism before assembly comprises the following steps:
step one, calculating the precompression force of a spring according to the requirement of the input torque of a breaker body, and applying downward pressure to the spring through a pressure plate to enable the precompression force of the spring to reach the required calculated value;
moving a piston rod of the buffer to an upper limit position, measuring the distance between a first pin hole in the piston rod and a pressure plate at the moment, measuring the distance between a second pin hole in the pressure joint and the lower end face of the pressure joint, and calculating the difference value between the two distances;
sequentially sleeving an adjusting gasket and a crimping head at the upper end of the piston rod to enable the thickness of the adjusting gasket to be equal to the difference, namely enabling a first pin hole in the piston rod to be correspondingly communicated with a second pin hole in the crimping head, and finally installing a pin shaft in the first pin hole and the second pin hole; or, firstly, releasing the pressure of the spring, then sequentially sleeving the adjusting gasket and the crimping head on the upper end of the piston rod to enable the thickness of the adjusting gasket to be equal to the difference value, then applying downward pressure to the spring through the pressing plate again to enable the precompression force of the spring to be consistent with the calculated value, namely enabling the first pin hole in the piston rod to be correspondingly communicated with the second pin hole in the crimping head, and finally installing the pin shaft in the first pin hole and the second pin hole.
The beneficial effects of the above technical scheme are that: according to the adjusting method, after the spring is compressed to the calculated pre-compression force, the piston rod of the buffer is moved to the upper limit position, the distance between the first pin hole in the piston rod and the pressing plate is measured, the distance between the second pin hole in the pressing joint and the lower end face of the pressing joint is measured, the difference between the two distances is calculated, then the adjusting gasket is used for making up the difference, namely the pressing joint is padded up to make up the dislocation between the first pin hole and the second pin hole, so that the first pin hole and the second pin hole are correspondingly communicated, and therefore the pin shaft is convenient to mount. When the adjusting gasket is installed, the spring can be directly installed on the premise that the spring keeps the required pre-compression force, the pressure of the spring can be released firstly, after the adjusting gasket and the pressing joint are installed, the spring is compressed to the required pre-compression force, and the effects of the two modes are the same.
According to the adjusting method, the difference is calculated firstly, namely the thickness of the adjusting gasket to be installed is known in advance, so that the gasket with the proper thickness or the gaskets with the proper number are directly selected to be installed in a superposition mode, the operation is convenient, and the assembling efficiency is high.
Further, after the pin shaft is installed, a stopping structure is fixed outside the crimping connector to prevent the pin shaft from being separated from the crimping connector.
The beneficial effects of the above technical scheme are that: the stop structure fixed outside the press-connection head can be used for better preventing the pin shaft from being separated from the press-connection head, and the normal use of the spring operating mechanism is ensured.
Further, when the adjusting gaskets are installed, at least two adjusting gaskets with different thicknesses are adopted for superposition, and the sum of the thicknesses of the adjusting gaskets is equal to the difference.
The beneficial effects of the above technical scheme are that: the adjusting gaskets with unequal thicknesses are used in a superposed mode, the sum of the thicknesses of all the adjusting gaskets can be more easily ensured to reach a required value, and the operation flexibility is higher.
Drawings
FIG. 1 is a block diagram of a spring operating mechanism according to the present invention;
FIG. 2 is a front view of the pressing joint of the spring operating mechanism of the present invention;
FIG. 3 is a left side view of the press contact head of the spring operating mechanism of the present invention;
FIG. 4 is a top view of the crimping head of the spring operating mechanism of the present invention;
FIG. 5 is a sectional view taken along line A-A in FIG. 3;
FIG. 6 is an enlarged view at B of FIG. 1;
FIG. 7 is a bottom view of the spring actuator of FIG. 1 with the force transfer plate removed;
FIG. 8 is a front view of the spring cartridge of the spring operating mechanism of the present invention;
FIG. 9 is a top view of the bottom end flange of the spring cartridge of FIG. 8;
fig. 10 is a side view of the bottom end flange of the spring cartridge of fig. 8.
In the figure: 1. static contact; 2. a moving contact; 3. an output crank arm; 4. a pull rod; 5. a crimping head; 5-1, connecting a cylinder; 5-2, ear plates; 5-3, ring grooves; 5-4, a second pin hole; 5-5, hinge holes; 5-6, a jack; 6. a pin shaft; 7. a hose clamp; 8. adjusting the gasket; 9. pressing a plate; 10. a brake separating spring; 11. a piston rod; 12. a spring case; 12-1, a cylinder body; 12-2, a top flange; 12-3, a bottom flange; 12-3-1, a first threaded hole; 12-3-2, a second threaded hole; 12-3-3, intercommunicating pore; 13. a spring seat plate; 14. adjusting the gasket; 15. an outer cylinder base; 15-1, an outer cylinder flange; 16. an inner cylinder base; 16-1, an inner cylinder flange; 17. pushing the push rod; 18. a force transmission plate; 19. adjusting the bolt; 20. a baffle plate; 21. a connecting screw; 22. a set screw; 23. an oil drain bolt; 24. tightening the screw; 25. and a rod end joint bearing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in 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 invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. 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 invention, as claimed, but is merely representative of selected embodiments of the invention. 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, terms such as "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 … …," or the like, does not exclude the presence of other like 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 spring operating mechanism of the present invention is shown in fig. 1, and includes a frame and a spring barrel 12 fixed on the frame, wherein the spring barrel 12 is arranged vertically, the spring operating mechanism further includes a brake separating spring 10 arranged inside the spring barrel 12, and a buffer arranged inside the brake separating spring 10. The upper end of the opening spring 10 is provided with a pressing plate 9, the buffer comprises a piston rod 11, and the upper end of the piston rod 11 penetrates through the pressing plate 9 to be connected with a pressing joint 5. The press-connection head 5 is in transmission connection with the pull rod 4 of the spring operating mechanism, specifically, in the present embodiment, the upper portion of the press-connection head 5 is hinged with a rod end joint bearing 25, and the rod end joint bearing 25 is in threaded connection with the lower end of the pull rod 4. The upper end of the pull rod 4 is connected with the output crank arm 3, the output crank arm 3 is simultaneously connected with the moving contact 2, and therefore when the opening spring 10 releases energy, the pull rod 4 can be driven to move upwards, the output crank arm 3 is driven to rotate clockwise, and the moving contact 2 moves downwards to be opened with the static contact 1.
Specifically, the piston rod 11 and the crimping head 5 in the present invention are connected by a pin 6, the pin 6 is a shear elastic cylindrical pin, and the piston rod 11 is provided with a first pin hole (not shown in the figure) for the pin 6 to pass through. Meanwhile, as shown in fig. 2, 3, 4 and 5, the crimping head 5 includes a connecting cylinder 5-1 connected to the piston rod 11 and two lug plates 5-2 connected to the upper end of the connecting cylinder 5-1 and arranged in parallel and spaced, and the two lug plates 5-2 are hinged to the rod end joint bearing 25, so that the two lug plates 5-2 are provided with hinge holes 5-5. The connecting cylinder 5-1 is provided with an insertion hole 5-6 for inserting the upper end of the piston rod 11, the connecting cylinder 5-1 is provided with a second pin hole 5-4 for the pin shaft 6 to pass through, and the second pin hole 5-4 penetrates through the hole wall of the insertion hole 5-6.
In addition, a stopping structure for stopping the end of the pin 6 to prevent the pin 6 from falling out of the press-connection head 5 is fixed outside the press-connection head 5, and as shown in fig. 1, the stopping structure in this embodiment is a hose clamp 7, and the hose clamp 7 is used as the stopping structure, so that the arrangement is convenient, and the installation and operation are simple. Meanwhile, in order to better limit the position of the hose clamp 7 and avoid dislocation, a ring groove 5-3 for the hose clamp 7 to be embedded is arranged on the outer peripheral surface of the connecting cylinder 5-1, and obviously, the second pin hole 5-4 penetrates through the bottom wall of the ring groove 5-3.
As shown in fig. 1, an adjusting washer 8 is interposed between the lower end surface of the crimping head 5 and the upper end surface of the pressure plate 9, and the adjusting washer 8 is sleeved outside the piston rod 11, so that the second pin hole 5-4 and the first pin hole can be still correspondingly communicated after the opening spring 10 is compressed to a required pre-compression force, so that the pin shaft 6 can pass through the adjusting washer. That is, during assembly, the opening spring 10 can be compressed to a required pre-compression force, at this time, the first pin hole in the piston rod 11 and the second pin hole 5-4 in the crimping head 5 are staggered up and down, and the adjusting gasket 8 is sleeved outside the piston rod 11 to cushion the crimping head 5, so that the dislocation between the first pin hole and the second pin hole 5-4 can be compensated, the first pin hole and the second pin hole are correspondingly communicated, and the installation of the pin shaft 6 is facilitated. Preferably, the adjusting shim 8 is provided with a plurality of adjusting shims, wherein the thicknesses of at least two adjusting shims 8 are different, so that the adjusting shims are stacked for use, and the sum of the thicknesses of the adjusting shims can be more easily ensured to reach a required value.
The assembly process of the spring operating mechanism, namely the embodiment of the speed characteristic adjusting method before the assembly of the spring operating mechanism, of the invention comprises the following steps:
step one, calculating the precompression force of the opening spring 10 according to the requirement of the input torque of the breaker body, and applying downward pressure to the opening spring 10 through the pressure plate 9 to enable the precompression force of the opening spring 10 to reach the required calculated value. The specific operation can be carried out on the press, so that whether the pre-compression force of the opening spring 10 reaches a required calculated value can be judged according to the force value displayed on the press panel.
And step two, moving the piston rod 11 of the buffer to an upper limit position, measuring the distance between the first pin hole on the piston rod 11 and the pressing plate 9 at the moment, measuring the distance between the second pin hole 5-4 on the crimping head 5 and the lower end surface of the crimping head 5, and calculating the difference between the two distances.
And step three, firstly releasing the pressure of the opening spring 10, and then sequentially sleeving the adjusting gasket 8 and the press-connection head 5 on the upper end of the piston rod 11 to enable the thickness of the adjusting gasket 8 to be equal to the difference, in order to facilitate operation, overlapping at least two adjusting gaskets 8 with different thicknesses, and enabling the sum of the thicknesses of the adjusting gaskets 8 to be equal to the difference. And then, downward pressure is applied to the opening spring 10 through the pressure plate 9 again, the process is also carried out on a press machine, the precompression force of the opening spring 10 is kept consistent with the calculated value, the first pin hole in the piston rod 11 can be correspondingly communicated with the second pin hole 5-4 in the press-connection head 5, and finally the pin shaft 6 is installed in the first pin hole and the second pin hole 5-4.
And step four, after the pin shaft 6 is installed, fixing a hose clamp 7 outside the crimping head 5 to serve as a stopping structure so as to prevent the pin shaft 6 from being separated from the crimping head 5.
The spring operating mechanism enables the piston rod 11 to be connected with the pressing joint 5 through the pin shaft 6, and the adjusting gasket 8 is clamped between the lower end face of the pressing joint 5 and the upper end face of the pressing plate 9, so that the installation of the pin shaft 6 is facilitated, the opening spring 10 is compressed to a required precompression force, compared with the prior art, the adjusting gasket 8 cannot be separated, the precompression amount of the opening spring 10 can be kept unchanged, the adjusting effect is guaranteed to be unchanged, and other components cannot be influenced by the installation of the adjusting gasket 8, so that the adjusting effect is better. Meanwhile, the adjusting method firstly calculates the difference, namely the thickness of the adjusting gasket to be installed is known in advance, so that the gasket with proper thickness or the gaskets with proper quantity are directly selected to be installed in a superposition mode, the operation is convenient, and the assembly efficiency is high.
In addition to the above-mentioned specific structural design and the specific implementation method of the spring operating mechanism of the present invention for adjusting the speed characteristics before assembly, the spring operating mechanism of the present invention can also adjust the speed characteristics during the use process after assembly, which will be described in further detail below.
As shown in fig. 1, 6 and 7, the buffer comprises an outer cylinder base 15 and an inner cylinder base 16 inserted into the outer cylinder base 15, wherein an outer cylinder flange 15-1 extending outwards is arranged at the bottom end of the outer cylinder base 15, an inner cylinder flange 16-1 extending outwards is arranged at the bottom end of the inner cylinder base 16, the inner cylinder flange 16-1 is positioned below the outer cylinder flange 15-1, and the two are fixedly connected through a fixing screw 22.
The bottom end of the spring cylinder 12 is fixedly connected with the outer cylinder flange 15-1, and specifically, as shown in fig. 8, the spring cylinder 12 comprises a cylinder body 12-1, a top end flange 12-2 fixed at the top end of the cylinder body 12-1, and a bottom end flange 12-3 fixed at the bottom end of the cylinder body 12-1. Wherein, the top end flange 12-2 extends outwards and is square and is fixedly connected with the frame of the spring operating mechanism. As shown in FIG. 9, the bottom end flange 12-3 also extends outwards and is square, the bottom end flange 12-3 is just as large as the outer cylinder flange 15-1, and the two are fixedly connected through the connecting screws 21, and the number of the connecting screws 21 is four, so that the bottom end flange 12-3 is provided with four first threaded holes 12-3-1.
As shown in fig. 1 and 6, a spring seat plate 13 is disposed in the spring case 12, and the spring seat plate 13 is located between the lower end of the opening spring 10 and the outer cylinder flange 15-1. The spring operating mechanism further comprises a push rod 17 which is used for being arranged on the inner cylinder flange 16-1 and the outer cylinder flange 15-1 when in use, and the push rod 17 is used for pushing the spring seat plate 13 upwards so as to compress the opening spring 10. Specifically, the ejector pin 17 includes a polished rod segment passing through the inner cylinder flange 16-1 and the outer cylinder flange 15-1, and the ejector pin 17 is arranged in plurality, four in the present embodiment, as shown in fig. 7, in the circumferential direction, so that four through holes are provided in the inner cylinder flange 16-1 and the outer cylinder flange 15-1, respectively, for passing through the ejector pin 17.
The spring operating mechanism further comprises a force transmission plate 18 fixedly connected with the lower end of each ejector rod 17, and the force transmission plate 18 is used for applying thrust to each ejector rod 17 simultaneously under the action of external force, so that the plurality of ejector rods 17 can be driven to eject the spring seat plate 13 together. Specifically, the ejector pin 17 is threadedly connected with the force transmission plate 18, and the ejector pin 17 includes a screw section threadedly connected with the force transmission plate 18. And a step used for stopping and matching with the force transmission plate 18 is arranged between the screw rod section and the polish rod section, so that the installation of the ejector rod 17 and the force application of the ejector rod 17 by the force transmission plate 18 are facilitated.
The spring operating mechanism further comprises an adjusting bolt 19 which is used for penetrating through the central part of the force transmission plate 18 and is in threaded connection with the inner cylinder base 16, and the adjusting bolt 19 is used for pushing the force transmission plate 18 to move through a bolt head when rotating. As shown in fig. 7, two oil drain bolts 23 are connected to the inner cylinder block 16, and two relief holes (not shown) are provided in the force transmission plate 18 to avoid interference with the oil drain bolts 23.
The bottom of the spring cylinder 12 is provided with communicating holes communicated with the inner cavity of the spring cylinder, specifically, as shown in fig. 10, the communicating holes 12-3-3 are arranged on a bottom end flange 12-3 of the spring cylinder 12, two of the communicating holes 12-3-3 are symmetrically arranged on two flat side surfaces, the communicating holes 12-3-3 are rectangular holes and have downward openings, and form a rectangular channel together with the outer cylinder flange 15-1, and the rectangular channel can be used for the adjusting gasket 14 to pass through so that the adjusting gasket 14 is plugged between the spring seat plate 13 and the outer cylinder flange 15-1. Of course, the width of the communication hole 12-3-3 is smaller than the interval between the two knock rods 17 to avoid interference of the shim 14 with the knock rod 17, and the shim 14 is sized to be placed in the annular space between the spring case 12 and the outer cylinder block 15.
As shown in FIGS. 1 and 7, a stopper 20 for blocking the communication hole 12-3-3 is detachably attached to the outside of the bottom end flange 12-3 by a set screw 24 to prevent the spacer 14 from coming off. The baffle plates 20 are flat plates, which are convenient to process and manufacture, and as shown in fig. 9 and 10, two second threaded holes 12-3-2 are respectively arranged on the bottom end flange 12-3 corresponding to the fixing positions of each baffle plate 20 so as to be in threaded connection with the set screws 24.
Because of manufacturing error and assembly error, the switching-off spring 10 needs to be finely adjusted to meet the switching-off speed characteristic of the breaker body, or when the switching-off speed characteristic needs to be adjusted in the using process of the spring operating mechanism, the push rod 17 is firstly installed on the force transmission plate 18, then the adjusting bolt 19 penetrates through the force transmission plate 18 to be in threaded connection with the inner cylinder seat 16, a polished rod section of the push rod 17 penetrates through the inner cylinder flange 16-1 and the outer cylinder flange 15-1 to extend into the inner cavity of the spring barrel and push the spring seat plate 13, the spring seat plate 13 moves upwards, the switching-off spring 10 is compressed, the adjusting gasket 14 is plugged between the spring seat plate 13 and the outer cylinder flange 15-1 through a communication hole on the bottom end flange 12-3 of the spring barrel 12, then the force transmission plate 18, the push rod 17 and the adjusting bolt 19 are removed to complete the adjustment of the force value of the switching-off spring 10, and finally the baffle 20 is fixed outside the bottom end flange 12-3, ensuring that the adjustment pad 14 does not escape after multiple operational oscillations of the circuit breaker mechanism.
In other embodiments of the method for adjusting the pre-assembly speed characteristic of a spring actuator: when the adjusting shim is installed, a plurality of adjusting shims with the same thickness can be superposed, or only one adjusting shim with a specific thickness can be used.
In other embodiments of the method for adjusting the pre-assembly speed characteristic of a spring actuator: when the stop structure is fixed outside the crimping head, a binding belt or an arc-shaped baffle plate can be adopted, and the arc-shaped baffle plate is fixed on the crimping head through a screw.
In other embodiments of the method for adjusting the pre-assembly speed characteristic of a spring actuator: step four can be omitted, that is, the stop structure is not fixed outside the crimping connector, for example, the pin shaft can be ensured not to be separated from the crimping connector through interference assembly of the pin shaft, or an elastic retainer ring is installed on the end portion of the pin shaft to limit the separation of the pin shaft.
In other embodiments of the method for adjusting the pre-assembly speed characteristic of a spring actuator: in the third step, the pressure of the spring is not released, but the adjusting gasket and the compression joint are directly sleeved at the upper end of the piston rod in sequence, so that the thickness of the adjusting gasket is equal to the calculated difference value, the first pin hole in the piston rod is correspondingly communicated with the second pin hole in the compression joint, and finally the pin shaft is installed in the first pin hole and the second pin hole.
In other embodiments of the spring actuator: the crimp head may also include a connecting cylinder and an ear plate coupled to the connecting cylinder, the ear plate being configured to be drivingly coupled to the spring actuator.
In other embodiments of the spring actuator: the upper part of the crimping head can also be directly hinged with the pull rod, so that the transmission connection between the crimping head and the pull rod is realized.
In other embodiments of the spring actuator: when there are a plurality of the adjustment shims, the thickness of each adjustment shim may be equal.
In other embodiments of the spring actuator: there is only one adjustment pad, the thickness of which is directly equal to the calculated difference.
In other embodiments of the spring actuator: the stop structure can also adopt a ribbon, and of course, an arc-shaped baffle can also be adopted, and the arc-shaped baffle is fixed on the compression joint head through a screw.
In other embodiments of the spring actuator: when the stop structure is a hose clamp or a ribbon, the stop structure can be directly fixed outside the crimping head without arranging a ring groove on the outer peripheral surface of the crimping head.
In other embodiments of the spring actuator: the external part of the crimping joint is not fixed with a blocking structure, but the pin shaft is ensured not to be separated from the crimping joint through the interference assembly of the pin shaft, or an elastic retainer ring for mounting a shaft is arranged at the end part of the pin shaft so as to limit the separation of the pin shaft.
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 spring operating mechanism comprises a vertically arranged spring barrel (12), a spring arranged in the spring barrel (12) and a buffer arranged on the inner side of the spring, wherein a pressing plate (9) is arranged at the upper end of the spring, the buffer comprises a piston rod (11), the upper end of the piston rod (11) penetrates through the pressing plate (9) to be connected with a crimping head (5), the crimping head (5) is used for being in transmission connection with a pull rod (4) of the spring operating mechanism, the spring operating mechanism is characterized in that the piston rod (11) is connected with the crimping head (5) through a pin shaft (6), a first pin hole for the pin shaft (6) to penetrate through is formed in the piston rod (11), a jack for the upper end of the piston rod (11) to be inserted into is formed in the crimping head (5), a second pin hole for the pin shaft (6) to penetrate through is formed in the crimping head (5), and an adjusting gasket (8) is clamped between the lower end face of the crimping head (5) and the upper end face of the pressing plate (9), the adjusting gasket (8) is sleeved outside the piston rod (11) and used for enabling the second pin hole and the first pin hole to be correspondingly communicated after the spring is compressed to a required pre-compression force so as to enable the pin shaft (6) to penetrate through.
2. The spring operating mechanism according to claim 1, wherein the press-connection head (5) is externally fixed with a stopping structure for stopping the end of the pin (6) to prevent the pin (6) from being removed from the press-connection head (5).
3. The spring operated mechanism of claim 2 wherein the stop structure is a hose clamp (7) or a tie.
4. The spring operating mechanism according to claim 3, wherein the outer circumference of the pressing head (5) is provided with a ring groove (5-3) for embedding the hose clamp (7) or the binding belt.
5. A spring operating mechanism according to any one of claims 1 to 4, characterised in that the adjusting shim (8) is provided in at least two.
6. A spring operating mechanism according to claim 5 wherein at least two of the adjustment pads (8) have unequal thicknesses in each adjustment pad (8).
7. The spring actuator according to any one of claims 1 to 4, wherein the press-connection head (5) comprises a connecting cylinder (5-1) connected to the piston rod (11) and two parallel ear plates (5-2) spaced apart from each other and connected to an upper end of the connecting cylinder (5-1), the two ear plates (5-2) being adapted to be drivingly connected to the pull rod (4) of the spring actuator, and the insertion hole and the second pin hole being provided in the connecting cylinder (5-1).
8. The method of adjusting a pre-assembly speed characteristic of a spring actuator of claim 1, comprising the steps of:
step one, calculating the precompression force of a spring according to the requirement of the input torque of a breaker body, and applying downward pressure to the spring through a pressure plate (9) to enable the precompression force of the spring to reach the required calculated value;
moving a piston rod (11) of the buffer to an upper limit position, measuring the distance between a first pin hole in the piston rod (11) and a pressure plate (9), measuring the distance between a second pin hole (5-4) in a pressure welding head (5) and the lower end face of the pressure welding head (5), and calculating the difference between the two distances;
sequentially sleeving an adjusting gasket (8) and a crimping head (5) at the upper end of the piston rod (11), enabling the thickness of the adjusting gasket (8) to be equal to the difference value, enabling a first pin hole in the piston rod (11) to be correspondingly communicated with a second pin hole (5-4) in the crimping head (5), and finally installing a pin shaft (6) in the first pin hole and the second pin hole (5-4); or, firstly, releasing the pressure of the spring, then sequentially sleeving the adjusting gasket (8) and the crimping head (5) on the upper end of the piston rod (11) to enable the thickness of the adjusting gasket (8) to be equal to the difference value, then applying downward pressure to the spring through the pressure plate (9) again to enable the precompression force of the spring to be consistent with the calculated value, namely enabling the first pin hole in the piston rod (11) to be correspondingly communicated with the second pin hole (5-4) in the crimping head (5), and finally installing the pin shaft (6) in the first pin hole and the second pin hole (5-4).
9. The method for adjusting the pre-assembly speed characteristic of a spring operating mechanism according to claim 8, wherein after the pin (6) is installed, a stop structure is fixed to the outside of the crimping head (5) to prevent the pin (6) from coming out of the crimping head (5).
10. The method for adjusting the pre-assembly speed characteristics of a spring operating mechanism according to claim 8, wherein the adjusting spacers (8) are stacked by using at least two adjusting spacers (8) having different thicknesses, and the sum of the thicknesses of the adjusting spacers (8) is equal to the difference.
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| CN202111565248.9A CN114709114B (en) | 2021-12-20 | 2021-12-20 | Spring operating mechanism and speed characteristic adjusting method before assembly thereof |
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| CN202111565248.9A CN114709114B (en) | 2021-12-20 | 2021-12-20 | Spring operating mechanism and speed characteristic adjusting method before assembly thereof |
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