阅读说明：本技术 用于刀闸的安装维修工具 (A installation repair tools for switch ) 是由 胡兆刚 于 2020-11-17 设计创作，主要内容包括：本发明提供了一种用于刀闸的安装维修工具,涉及电力设备的技术领域,包括固定支架、操控端和锁定机构；刀闸包括刀闸杆、弹簧和固定环,刀闸杆设置有阶梯段,弹簧能够通过阶梯段和固定环压缩在刀闸杆的外部；当需要更换刀闸的弹簧时,利用操控端调节锁定机构带动活动座沿着刀闸杆移动,进而通过固定环压缩或者释放弹簧；当操控端停止运动时,此时由于锁定机构的单向传递动力,因此弹簧的能量无法带动锁定机构进行运动,此时活动座通过锁定机构完成了自锁,缓解了现有技术中存在的刀闸弹簧拆装时容易释能伤人,以及拆装耗时,存在风险的技术问题,消除夹紧弹簧释能飞出伤人的作业风险。(The invention provides a tool for installing and maintaining a disconnecting link, which relates to the technical field of power equipment and comprises a fixed support, an operation end and a locking mechanism, wherein the fixed support is fixedly connected with the disconnecting link; the knife switch comprises a knife switch rod, a spring and a fixing ring, the knife switch rod is provided with a step section, and the spring can be compressed outside the knife switch rod through the step section and the fixing ring; when the spring of the disconnecting link needs to be replaced, the control end is used for adjusting the locking mechanism to drive the movable seat to move along the disconnecting link rod, and then the spring is compressed or released through the fixing ring; when the control end stops moving, the energy of the spring cannot drive the locking mechanism to move due to the unidirectional power transmission of the locking mechanism, and the movable seat completes self-locking through the locking mechanism, so that the technical problems that the disconnecting link spring is easy to release energy to hurt people when being disassembled and assembled, the disassembling and the assembling are time-consuming and have risks are solved, and the operation risk that the clamping spring releases energy to fly out to hurt people is eliminated.)

1. A mounting and maintaining tool for a disconnecting link comprises a disconnecting link rod, a spring and a fixing ring, wherein the disconnecting link rod is provided with a step section, the spring is sleeved outside the disconnecting link rod, one end of the spring is abutted against the step section of the disconnecting link rod through a gasket, and the other end of the spring is abutted against the fixing ring;

it is characterized by comprising: the device comprises a control end, a locking mechanism and a fixed support;

the fixed support comprises a fixed seat and a movable seat, a movable space is formed between the fixed seat and the movable seat, the knife switch rod is connected with the fixed seat, and the movable seat is sleeved on the knife switch rod and is pressed against the fixed ring;

the locking mechanism is respectively in transmission connection with the control end and the movable seat, the locking mechanism is used for one-way transmission power, the control end drives the movable seat to move along the knife switch rod through the locking mechanism, and the movable seat is compressed or released through the fixing ring in the moving process.

2. The installation and maintenance tool for a disconnecting link according to claim 1, wherein the locking mechanism comprises a worm gear, a worm and a thread connecting sleeve;

the control end is in transmission connection with the worm wheel through the worm, and the threaded connecting sleeve is connected with the center of the worm wheel;

the sliding seat with be provided with the threaded rod between the fixing base, the threaded rod with fixing base fixed connection, the sliding seat is provided with first through-hole, the threaded rod passes through first through-hole passes the sliding seat, just the thread connection cover with the sliding seat joint, the thread connection cover with threaded rod threaded connection.

3. The installation and maintenance tool for a disconnecting link according to claim 2, further comprising a transmission mechanism;

the transmission mechanism is located between the control end and the worm, and the control end is in transmission connection with the locking mechanism through the transmission mechanism.

4. The installation and maintenance tool for a knife switch of claim 3, wherein the transmission mechanism comprises a multi-stage transmission gear;

any two adjacent stages of the transmission gears are meshed with each other and are in transmission connection, the first stage of the transmission gears is fixedly connected with the control end, and the last stage of the transmission gears is in transmission connection with the locking mechanism.

5. The installation and maintenance tool for a knife switch as claimed in claim 4, characterized in that the transmission mechanism comprises a first spur gear and a second spur gear which are meshed with each other;

the first straight gear is fixedly connected with the worm, the control end is provided with a transmission shaft, and the transmission shaft is inserted into a central hole of the second straight gear so that the second straight gear is in transmission connection with the control end.

6. The installation and maintenance tool for the disconnecting link according to claim 2, wherein the threaded connection sleeve comprises a first connection section, a second connection section and a connection protrusion;

the first connecting section and the second connecting section are fixedly connected through the connecting bulge, the first connecting section is inserted into the first through hole of the movable seat, the connecting bulge is abutted against the movable seat, and the second connecting section is connected with the center of the worm wheel.

7. The installation and maintenance tool for the disconnecting link according to claim 6, wherein the movable seat is slidably connected with the fixed seat, a clamping space is formed between the movable seat and the fixed seat, and the disconnecting link rod is located in the clamping space.

8. The installation and maintenance tool for the disconnecting link according to claim 7, wherein the fixed seat comprises a base and a supporting tube which are vertically arranged; the movable seat comprises a movable plate and a sliding pipe which are vertically arranged;

the supporting tube is fixedly connected with one end of the base, the threaded rod is fixedly connected with the other end of the base, the sliding tube is fixedly connected with one end of the movable plate, the sliding tube is inserted into the supporting tube, the sliding tube and the supporting tube are matched and connected through a sliding rail and a sliding groove, and the threaded rod and the supporting tube are symmetrically arranged relative to the central line of the base;

be provided with on the fly leaf and be used for running through the second through-hole of knife-switch pole, first through-hole with the slip pipe for the second through-hole is symmetrical arrangement, the aperture of second through-hole is greater than the external diameter of knife-switch pole, just the aperture of second through-hole is less than gu fixed ring's diameter, so that the fly leaf with gu fixed ring's butt.

9. The installation and maintenance tool for the disconnecting link according to claim 6, wherein the threaded rods are provided in two groups, the movable seat is provided with a second through hole for penetrating the disconnecting link rod, and the two groups of threaded rods are symmetrically arranged relative to the second through hole;

the locking mechanism is provided with two groups, each group of locking mechanism is respectively connected with each group of corresponding threaded rods, the number of the control ends is corresponding to that of the locking mechanisms, and each group of control ends is in transmission connection with the corresponding locking mechanism.

10. The tool for installing and maintaining the knife switch according to any one of claims 1 to 9, wherein a groove is formed at one end of the knife switch rod close to the step section, a slot is formed in the fixing seat corresponding to the position of the knife switch rod, a protrusion is arranged in the slot, the knife switch rod is inserted into the slot, and the groove is clamped with the protrusion.

Technical Field

The invention relates to the technical field of power equipment, in particular to an installation and maintenance tool for a disconnecting link.

Background

The GW16-220 type single-column vertical fracture isolating switch is a three-pole outdoor high-voltage electrical appliance which is used for switching a 220kV high-voltage line under the condition of no current load and electrically isolating a high-voltage bus and other electrical equipment to be repaired from a live line; the knife switch has the advantages of reliable performance, simple operation and good through-flow performance, but the knife switch also has certain defects, for example, in the long-term use process of the knife switch, the internal balance and the stroke of a clamping spring are shortened, so that the moment is reduced, the phenomena of difficult opening and closing, reduced pressure of a clamping contact and the like often occur, and therefore, after a certain age limit is reached, the GW16 knife switch needs to be disassembled and overhauled.

The GW16 type disconnecting link is complex in structure and difficult to disassemble, wherein the GW16 type disconnecting link comprises energy storage components such as a reset spring, a clamping spring, a balance spring and the like, and people can be injured due to the fact that elastic potential energy of the springs is easily released during disassembly and assembly; the most energetic part is the clamping spring, and not only the dismouting is consuming time, and the clamping spring will release elastic potential energy when knocking out the locating pin moreover, if do not have the instrument to handle the accuse, then has great risk.

Disclosure of Invention

The invention aims to provide an installation and maintenance tool for a disconnecting link, which is used for solving the technical problems that in the prior art, when a disconnecting link spring is assembled and disassembled, energy is easy to release to hurt people, time is consumed for assembling and disassembling, and risks exist.

The invention provides an installation and maintenance tool for a disconnecting link, wherein the disconnecting link comprises a disconnecting link rod, a spring and a fixing ring, the disconnecting link rod is provided with a step section, the spring is sleeved outside the disconnecting link rod, one end of the spring is abutted against the step section of the disconnecting link rod through a gasket, and the other end of the spring is abutted against the fixing ring;

the installation and maintenance tool for the disconnecting link comprises: the device comprises a control end, a locking mechanism and a fixed support;

the fixed support comprises a fixed seat and a movable seat, a movable space is formed between the fixed seat and the movable seat, the knife switch rod is connected with the fixed seat, and the movable seat is sleeved on the knife switch rod and is pressed against the fixed ring;

the locking mechanism is respectively in transmission connection with the control end and the movable seat, the locking mechanism is used for one-way transmission power, the control end drives the movable seat to move along the knife switch rod through the locking mechanism, and the movable seat is compressed or released through the fixing ring in the moving process.

In a preferred embodiment of the invention, the locking mechanism comprises a worm wheel, a worm and a thread connecting sleeve;

the control end is in transmission connection with the worm wheel through the worm, and the threaded connecting sleeve is connected with the center of the worm wheel;

the sliding seat with be provided with the threaded rod between the fixing base, the threaded rod with fixing base fixed connection, the sliding seat is provided with first through-hole, the threaded rod passes through first through-hole passes the sliding seat, just the thread connection cover with the sliding seat joint, the thread connection cover with threaded rod threaded connection.

In the preferred embodiment of the invention, the device further comprises a transmission mechanism;

the transmission mechanism is located between the control end and the worm, and the control end is in transmission connection with the locking mechanism through the transmission mechanism.

In a preferred embodiment of the invention, the transmission mechanism comprises a multi-stage transmission gear;

any two adjacent stages of the transmission gears are meshed with each other and are in transmission connection, the first stage of the transmission gears is fixedly connected with the control end, and the last stage of the transmission gears is in transmission connection with the locking mechanism.

In a preferred embodiment of the invention, the transmission mechanism comprises a first spur gear and a second spur gear which are meshed with each other;

the first straight gear is fixedly connected with the worm, the control end is provided with a transmission shaft, and the transmission shaft is inserted into a central hole of the second straight gear so that the second straight gear is in transmission connection with the control end.

In a preferred embodiment of the present invention, the threaded connection sleeve includes a first connection section, a second connection section and a connection protrusion;

the first connecting section and the second connecting section are fixedly connected through the connecting bulge, the first connecting section is inserted into the first through hole of the movable seat, the connecting bulge is abutted against the movable seat, and the second connecting section is connected with the center of the worm wheel.

In a preferred embodiment of the present invention, the movable seat is slidably connected to the fixed seat, a clamping space is formed between the movable seat and the fixed seat, and the disconnecting link is located in the clamping space.

In a preferred embodiment of the present invention, the fixing base includes a base and a supporting tube arranged vertically; the movable seat comprises a movable plate and a sliding pipe which are vertically arranged;

the supporting tube is fixedly connected with one end of the base, the threaded rod is fixedly connected with the other end of the base, the sliding tube is fixedly connected with one end of the movable plate, the sliding tube is inserted into the supporting tube, the sliding tube and the supporting tube are matched and connected through a sliding rail and a sliding groove, and the threaded rod and the supporting tube are symmetrically arranged relative to the central line of the base;

be provided with on the fly leaf and be used for running through the second through-hole of knife-switch pole, first through-hole with the slip pipe for the second through-hole is symmetrical arrangement, the aperture of second through-hole is greater than the external diameter of knife-switch pole, just the aperture of second through-hole is less than gu fixed ring's diameter, so that the fly leaf with gu fixed ring's butt.

In a preferred embodiment of the present invention, two sets of the threaded rods are provided, a second through hole for penetrating through the knife switch rod is provided on the movable seat, and the two sets of the threaded rods are symmetrically arranged relative to the second through hole;

the locking mechanism is provided with two groups, each group of locking mechanism is respectively connected with each group of corresponding threaded rods, the number of the control ends is corresponding to that of the locking mechanisms, and each group of control ends is in transmission connection with the corresponding locking mechanism.

In a preferred embodiment of the present invention, a groove is disposed at one end of the knife gate rod close to the step section, a slot is disposed at a position of the fixing base corresponding to the knife gate rod, a protrusion is disposed in the slot, the knife gate rod is inserted into the slot, and the groove is clamped with the protrusion.

In a preferred embodiment of the present invention, a third through hole is formed through the sidewall of the fixing ring and the knife bar, and when the spring is compressed to a predetermined position, the spring is inserted into the third through hole through a positioning pin.

The invention provides a mounting and maintaining tool for a disconnecting link, which comprises: the device comprises a fixed support, a control end and a locking mechanism; the knife switch comprises a knife switch rod, a spring and a fixing ring, wherein the knife switch rod is provided with a step section, and the spring can be compressed outside the knife switch rod through the step section and the fixing ring; in the actual operation process, the fixed support comprises a fixed seat and a movable seat, a movable space is formed between the fixed seat and the movable seat, the knife switch rod is connected with the fixed seat, and the movable seat is sleeved on the knife switch rod and is pressed against the fixed ring; the locking mechanism is respectively connected with the control end and the movable seat in a transmission way, and the transmission direction limited by the locking mechanism is as follows: the control end is towards the transmission direction of the movable seat; in other words, when the spring of the disconnecting link needs to be replaced, the control end is used for adjusting the locking mechanism to drive the movable seat to move along the disconnecting link rod, and then the spring is compressed or released through the fixing ring; when the control end stops moving, the energy of the spring cannot drive the locking mechanism to move due to the unidirectional power transmission of the locking mechanism, and the movable seat completes self-locking through the locking mechanism, so that the technical problems that the disconnecting link spring is easy to release energy to hurt people when being disassembled and assembled, the disassembling and the assembling are time-consuming and have risks are solved, and the operation risk that the clamping spring releases energy to fly out to hurt people is eliminated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic overall structure diagram of an installation and maintenance tool for a disconnecting link according to an embodiment of the present invention;

fig. 2 is a schematic overall structural diagram of another embodiment of an installation and maintenance tool for a disconnecting link according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a locking mechanism of an installation and maintenance tool for a disconnecting link according to an embodiment of the present invention;

fig. 4 is a partial enlarged structural schematic view of an installation and maintenance tool for a disconnecting link according to an embodiment of the present invention;

fig. 5 is an exploded view of a knife switch for installing a maintenance tool for the knife switch according to an embodiment of the present invention.

Icon: 100-a knife switch; 101-a blade bar; 111-a third via; 121-step section; 102-a spring; 103-a fixed ring; 200-a manipulation end; 300-a locking mechanism; 301-a worm gear; 302-a worm; 303-a threaded connection sleeve; 313 — a first connection segment; 323-second connection section; 333-connecting protrusion; 400-fixing the bracket; 401-a fixed seat; 411-a base; 421-supporting tube; 432-a projection; 402-a movable seat; 412-a movable plate; 422-sliding tube; 500-threaded rod; 600-a transmission mechanism; 601-a first straight gear; 602-second spur gear.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, in the installation and maintenance tool for a disconnecting link provided by the present embodiment, a disconnecting link 100 includes a disconnecting link rod 101, a spring 102 and a fixing ring 103, the disconnecting link rod 101 is provided with a step section 121, the spring 102 is sleeved outside the disconnecting link rod 101, one end of the spring 102 abuts against the step section 121 of the disconnecting link rod 101 through a gasket, and the other end of the spring 102 abuts against the fixing ring 103; the installation and maintenance tool for the knife switch 100 comprises: the manipulation end 200, the locking mechanism 300 and the fixing bracket 400; the fixed bracket 400 comprises a fixed seat 401 and a movable seat 402, a movable space is formed between the fixed seat 401 and the movable seat 402, the disconnecting link rod 101 is connected with the fixed seat 401, and the movable seat 402 is sleeved on the disconnecting link rod 101 and is pressed against the fixed ring 103; the locking mechanism 300 is in transmission connection with the control end 200 and the movable seat 402 respectively, the locking mechanism 300 is used for unidirectional transmission power, the control end 200 drives the movable seat 402 to move along the knife-switch rod 101 through the locking mechanism 300, and the movable seat 402 compresses or releases the spring 102 through the fixing ring 103 in the moving process.

It should be noted that the installation and maintenance tool for the disconnecting link provided in this embodiment can be used when the disconnecting link 100 is installed or removed, and the fixing bracket 400 can be abutted to the fixing ring 103 of the disconnecting link 100, and the fixing ring 103 is gradually driven by the locking mechanism 300 of the mechanical mechanism to compress or release the spring 102, so that the spring 102 in the disconnecting link 100 can be compressed or slowly released.

Two independent components can be arranged between the fixed seat 401 and the movable seat 402, or two structures in sliding connection can be arranged between the fixed seat 401 and the movable seat 402, and a movable space for clamping the fixed ring 103 and the spring 102 can be formed between the fixed seat 401 and the movable seat 402; optionally, the fixing base 401 is a fixed flat plate, wherein the knife bar 101 can be inserted into the fixed flat plate, the movable base 402 is a movable flat plate, the movable flat plate is sleeved outside the knife bar 101, and the movable flat plate can be lower than the fixing ring 103, wherein the locking mechanism 300 is in transmission connection with the movable base 402, the locking mechanism 300 is used for one-way transmission power, and the transmission direction defined by the locking mechanism 300 is: the operation end 200 is in a transmission direction towards the movable seat 402, so that the movement direction of the locking mechanism 300 can only move along with the operation of the operation end 200, and the movable seat 402 cannot drive the locking mechanism 300 to move, so that the spring 102 is compressed or released through the fixing ring 103 in the moving process of the movable seat 402.

Optionally, the manipulation end 200 may be driven by a manual handle or a micro motor, and preferably, the manipulation end 200 is a manual handle.

The installation repair tools for switch that this embodiment provided includes: a fixed bracket 400, a manipulation end 200 and a locking mechanism 300; the disconnecting link 100 comprises a disconnecting link rod 101, a spring 102 and a fixing ring 103, wherein the disconnecting link rod 101 is provided with a stepped section 121, and the spring 102 can be compressed outside the disconnecting link rod 101 through the stepped section 121 and the fixing ring 103; in the actual operation process, the fixed bracket 400 includes a fixed seat 401 and a movable seat 402, a movable space is formed between the fixed seat 401 and the movable seat 402, the disconnecting link rod 101 is connected with the fixed seat 401, and the movable seat 402 is sleeved on the disconnecting link rod 101 and is pressed against the fixed ring 103; the locking mechanism 300 is respectively connected with the operation end 200 and the movable seat 402 in a transmission way, power is transmitted in a single direction through the locking mechanism 300, and the transmission direction defined by the locking mechanism 300 is as follows: the transmission direction of the control end 200 to the movable seat 402; in other words, when the spring 102 of the knife switch 100 needs to be replaced, the manipulating end 200 is used to adjust the locking mechanism 300 to move the movable seat 402 along the knife switch rod 101, so as to compress or release the spring 102 through the fixing ring 103; when the operation end 200 stops moving, at this time, because of the unidirectional power transmission of the locking mechanism 300, the energy of the spring 102 cannot drive the locking mechanism 300 to move, and at this time, the movable seat 402 completes self-locking through the locking mechanism 300, so that the technical problems that the spring 102 of the disconnecting link 100 is easy to release energy to hurt people when being disassembled and assembled, and the disassembling and the assembling are time-consuming and have risks in the prior art are solved, and the operation risk that the clamping spring 102 releases energy to fly out to hurt people is eliminated.

On the basis of the above embodiment, further, in the preferred embodiment of the present invention, the locking mechanism 300 includes a worm wheel 301, a worm 302 and a thread connecting sleeve 303; the manipulation end 200 is in transmission connection with a worm wheel 301 through a worm 302, and a threaded connecting sleeve 303 is connected with the center of the worm wheel 301; be provided with threaded rod 500 between sliding seat 402 and fixing base 401, threaded rod 500 and fixing base 401 fixed connection, sliding seat 402 is provided with first through-hole, and threaded rod 500 passes sliding seat 402 through first through-hole, and threaded connection cover 303 and sliding seat 402 joint, threaded connection cover 303 and threaded rod 500 threaded connection.

The thread connecting sleeve 303 can be inserted into a connecting hole in the center of the worm wheel 301, and the thread connecting sleeve 303 and the connecting hole of the worm wheel 301 are fixedly connected by using a pin key and other structures, or the thread connecting sleeve 303 can be inserted into the connecting hole of the worm wheel 301 and then fixed by using a welding mode; in addition, the connection mode of the thread connecting sleeve 303 and the worm wheel 301 adopts an interference fit mode; preferably, the connection mode of the thread connecting sleeve 303 and the worm wheel 301 is through key connection.

Wherein, worm wheel 301 is perpendicular setting with thread connecting sleeve 303, and the rotation of worm wheel 301 can drive thread connecting sleeve 303 and carry out synchronous rotation promptly. It should be noted that, because the worm wheel 301 is connected with the worm 302 in a matching manner, the worm wheel 301 and the worm 302 have a structural arm amplification effect, and the worm wheel 301 and the worm 302 have self-locking characteristics, when the manipulation end 200 does not move, the worm wheel 301 has self-locking characteristics relative to the worm 302, even when the spring 102 of the disconnecting link 100 is released, the kinetic energy of the spring 102 cannot be transmitted to the worm wheel 301 through the thread connecting sleeve 303, so that the worm wheel 301 moves in the opposite direction, and therefore the stability of the thread connecting sleeve 303 at this time can be better ensured.

In order to drive the worm 302 with less effort, in the preferred embodiment of the present invention, the present invention further comprises a transmission mechanism 600; the transmission mechanism 600 is located between the manipulation end 200 and the worm 302, and the manipulation end 200 is in transmission connection with the locking mechanism 300 through the transmission mechanism 600.

In a preferred embodiment of the present invention, the transmission mechanism 600 includes a multi-stage transmission gear; any two adjacent transmission gears are meshed with each other and are in transmission connection, the first transmission gear is fixedly connected with the control end 200, and the last transmission gear is in transmission connection with the locking mechanism 300.

Wherein, among the multi-stage drive gear, it is different to utilize the number of teeth of each level drive gear, can reach different effects, and preferably, the number of teeth of first stage drive gear is greater than the number of teeth of last stage drive gear, consequently when rotating first stage drive gear through controlling end 200, the rotation of the drive multi-stage drive gear that can be more laborsaving and worm 302 and worm wheel 301 for the design is more reasonable.

In the preferred embodiment of the present invention, the transmission mechanism 600 includes a first spur gear 601 and a second spur gear 602 which are engaged with each other; the first spur gear 601 is fixedly connected with the worm 302, the control end 200 is provided with a transmission shaft, and the transmission shaft is inserted into a central hole of the second spur gear 602, so that the second spur gear 602 is in transmission connection with the control end 200.

Alternatively, the product of the transmission ratio of the first spur gear 601 and the second spur gear 602 and the transmission ratio of the worm 302 and the worm gear 301 can be equal to 1, so that the manipulation end 200 and the rotation of the threaded connection sleeve 303 are in synchronous motion, and the synchronous motion of the whole transmission mechanism 600 can be ensured on the basis of not influencing the transmission direction by means of meshing transmission of the first spur gear 601 and the second spur gear 602.

In addition, the product of the transmission ratio of the first spur gear 601 and the second spur gear 602 and the transmission ratio of the worm 302 and the worm wheel 301 can also be smaller than 1, at this time, a speed reducer is formed between the transmission mechanism 600 and the worm 302 and the worm wheel 301, and the manipulation end 200 can better drive the threaded connection sleeve 303.

In the preferred embodiment of the present invention, the screw coupling sleeve 303 includes a first coupling section 313, a second coupling section 323, and a coupling projection 333; the first connecting section 313 and the second connecting section 323 are fixedly connected through a connecting protrusion 333, the first connecting section 313 is inserted into the first through hole of the movable seat 402, the connecting protrusion 333 abuts against the movable seat 402, and the second connecting section 323 is connected with the center of the worm wheel 301.

In this embodiment, the thread connecting sleeve 303 serves as a connecting structure between the worm wheel 301 and the movable seat 402, and the thread connecting sleeve 303 needs to drive the movable seat 402 to move in the vertical direction, so that the connecting protrusion 333 is abutted against the movable seat 402, and when the thread connecting sleeve 303 moves in the vertical direction relative to the threaded rod 500, the movable seat 402 can compress or release the spring 102.

Optionally, when the fixed seat 401 and the movable seat 402 are two structures in sliding connection, in a preferred embodiment of the present invention, the movable seat 402 is in sliding connection with the fixed seat 401, a clamping space is formed between the movable seat 402 and the fixed seat 401, and the disconnecting link 101 is located in the clamping space.

In the preferred embodiment of the present invention, the fixing base 401 includes a base 411 and a supporting tube 421 which are vertically arranged; the movable seat 402 includes a movable plate 412 and a sliding tube 422 arranged vertically; the supporting tube 421 is fixedly connected with one end of the base 411, the threaded rod 500 is fixedly connected with the other end of the base 411, the sliding tube 422 is fixedly connected with one end of the movable plate 412, the sliding tube 422 is inserted into the supporting tube 421, the sliding tube 422 and the supporting tube 421 are connected in a matching manner through a sliding rail and a sliding groove, and the threaded rod 500 and the supporting tube 421 are symmetrically arranged relative to the central line of the base 411; the movable plate 412 is provided with a second through hole for penetrating through the knife switch rod 101, the first through hole and the sliding tube 422 are symmetrically arranged relative to the second through hole, the aperture of the second through hole is larger than the outer diameter of the knife switch rod 101, and the aperture of the second through hole is smaller than the diameter of the fixed ring 103, so that the movable plate 412 is abutted to the fixed ring 103.

The fixed seat 401 forms a structure similar to an L shape between the base 411 and the supporting tube 421, the movable seat 402 also forms a structure similar to an L shape between the movable plate 412 and the sliding tube 422, the sliding tube 422 is inserted into the supporting tube 421, the sliding tube 422 and the supporting tube 421 are connected in a sliding rail and sliding groove fit manner, a movable space with an opening at one end is formed between the base 411 and the movable plate 412, the threaded rod 500 and the supporting tube 421 are symmetrically arranged relative to the central line of the base 411, and the reciprocating motion of the threaded connecting sleeve 303 can enable the sliding tube 422 and the supporting tube 421 to perform reciprocating motion in a sliding manner, so that the whole structure runs better and completely, and the design is more reasonable.

Alternatively, when there are two separate parts between the fixed seat 401 and the movable seat 402, in a preferred embodiment of the present invention, two sets of threaded rods 500 are provided, a second through hole for penetrating the knife bar 101 is provided on the movable seat 402, and the two sets of threaded rods 500 are symmetrically arranged with respect to the second through hole; the locking mechanisms 300 are arranged in two groups, each group of locking mechanisms 300 is respectively connected with each corresponding group of threaded rods 500, the number of the control ends 200 is corresponding to that of the locking mechanisms 300, and each group of control ends 200 is in transmission connection with the corresponding locking mechanism 300.

In a specific operation, the two manipulating ends 200 are used for synchronously rotating the transmission mechanism 600, the two sets of worm screws 302 and worm wheels 301 are used for driving the two sets of worm screws and worm wheels, and the two sets of threaded connection sleeves 303 move on two sides of the movable plate 412, and at this time, the knife switch rod 101 is located in the middle of the movable plate 412, so that the springs 102 outside the knife switch rod 101 can be more uniformly compressed or released.

In a preferred embodiment of the present invention, a groove is disposed at one end of the knife switch rod 101 close to the step section 121, a slot is disposed at a position of the fixing base 401 corresponding to the knife switch rod 101, a protrusion 431 is disposed in the slot, the knife switch rod 101 is configured to be inserted into the slot, and the groove is clamped with the protrusion 431.

In the preferred embodiment of the present invention, a third through hole 111 is formed through the sidewall of the fixing ring 103 and the knife bar 101, and when the spring 102 is compressed to a predetermined position, the spring is inserted into the third through hole 111 through a positioning pin.

Wherein, both ends of the spring 102 are respectively provided with a gasket, which is convenient for realizing the compression or release of the spring 102.

In the specific process, in this embodiment, when the spring 102 is in a compressed state, the spring 102 abuts against the stepped section 121 of the disconnecting link rod 101 through a gasket, the other end of the spring 102 abuts against the fixing ring 103 through a gasket, and the fixing ring 103 and the disconnecting link rod 101 are inserted into the third through hole 111 through a positioning pin, so that the spring 102 is ensured to be in the compressed state all the time; when the spring 102 needs to be released for replacement, at this time, the fixed seat 401 is connected with one end of the disconnecting link 101 close to the step section 121, the movable seat 402 is sleeved outside the disconnecting link 101 through the other end of the disconnecting link 101, at this time, the movable seat 402 abuts against the fixed ring 103, the movable seat 402 is connected with the fixed seat 401 through the locking mechanism 300, further, the stability of the movable seat 402 can be ensured through the locking mechanism 300, at this time, the positioning pin is pulled out from the third through hole 111, then the movable seat 402 is gradually driven to move along the direction far away from the fixed seat 401 through the movement of the control end 200 and the threaded connecting sleeve 303 in the locking mechanism 300, until the elastic potential energy of the spring 102 is released completely, when the spring 102 is in an unstressed state, the locking mechanism 300 is separated from the movable seat 402, the movable seat 402 is separated from the fixed ring 103, the fixed ring 103 and the spring 102 are gradually taken out, completing the process of taking the spring 102; when the compression of the spring 102 is required, the above steps are reversed, and the details are not repeated here.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.