Device for dismounting and mounting mei flower contact

Abstract

The present disclosure belongs to the technical field of substation maintenance, and particularly relates to a dismounting and mounting device for a quincunx contact. The device comprises a dismounting tool and a mounting part. The quincunx contact is used to be installed on a contact arm. The dismounting tool comprises a clamp with an opening and an adjusting assembly. The clamp is wrapped around the outside of the contact blade of the quincunx contact. The adjusting assembly adjusts the size of the opening under the action of external force to tighten the outside of the contact blade. Under the support of the annular support frame of the quincunx contact, the inside of the contact blade in contact with the contact arm is lifted up and separated from the mounting groove of the contact arm against the spring force of the quincunx contact. The mounting part has a circular truncated cone section. The large end of the circular truncated cone section extends to form a positioning part, and the small end of the circular truncated cone section extends to form a hand holding part. The mounting part is pre-positioned by inserting the positioning part into the center hole of the contact arm under the action of external force. The quincunx contact moves along the small end to the large end through the hand holding part. The contact blade expands against the spring force and tightly holds the mounting groove of the contact arm. The dismounting and mounting device of the present disclosure ensures that the quincunx contact structure is stable and the spring is not easily damaged.

Description

Technical Field

[0001] This disclosure belongs to the field of substation maintenance technology, and specifically relates to a device for disassembling and assembling plum blossom contacts. Background Technology

[0002] High-voltage switches are key equipment in power systems used for controlling, switching on, and protecting high-voltage circuits. They are mainly used in power generation, transmission, distribution, and industrial power applications. The L-shaped contact is a crucial component in high-voltage switchgear, providing conductive and mechanical connections. During the maintenance of high-voltage switches, it is essential to monitor the working condition of the L-shaped contacts, such as overheating, discoloration, or poor contact. If any abnormalities are found, the contacts must be replaced promptly to ensure the normal operation of the high-voltage switch.

[0003] In the existing process of disassembling and assembling the plum blossom contact, operators usually use a screwdriver to pry the spring on the plum blossom contact to disassemble and assemble the contact. However, during the disassembly and installation process, due to uneven force applied during prying, it is very easy to cause the plum blossom contact structure to loosen or even fall apart, or the spring to break, making the disassembly and assembly of the plum blossom contact difficult and inefficient. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a device for disassembling and assembling a plum blossom contact.

[0005] This disclosure provides a disassembly and assembly device for a plum blossom contact, the plum blossom contact being used to mount on a contact arm. The disassembly and assembly device includes a disassembly tool and a reassembly component, wherein:

[0006] The disassembly tool includes a clamp with an opening and an adjustment assembly. The clamp is configured to wrap around the outside of the contact piece of the pentagonal contact mounted on the contact arm. The adjustment assembly is configured to adjust the size of the opening of the clamp under the action of an external force so that the outside of the contact piece is tightened. As a result, the inner side of the contact piece that contacts the contact arm, supported by the annular support frame of the pentagonal contact, overcomes the spring force of the pentagonal contact and lifts up and disengages from the mounting groove of the contact arm.

[0007] The reinstallation component has a frustum section. The large end of the frustum section extends in a direction away from the frustum section to form a positioning part, and the small end of the frustum section extends in a direction away from the frustum section to form a handle part. The reinstallation component is configured to allow the positioning part to be inserted into the center hole of the contact arm for pre-positioning under the action of an external force, and to allow the staggered contact to move through the handle part and along the direction from the small end to the large end, so that the inner side of the contact piece expands against the spring force of the staggered contact to be engaged in the mounting groove.

[0008] In one embodiment of this disclosure, the ratio of the end face diameter of the large end to the outer diameter of the contact arm is 1:1 to 1.2:1.

[0009] In one embodiment of this disclosure, the diameter of the end face of the large end is equal to the outer diameter of the contact arm.

[0010] In one embodiment of this disclosure, the angle between the generatrix of the frustum segment and the axis is 15°-30°.

[0011] In one embodiment of this disclosure, the positioning part is a cylinder extending along the axial direction of the frustum segment, and the gap between the positioning part and the central hole is 0-0.1 mm.

[0012] In one embodiment of this disclosure, the diameter of the positioning portion is equal to the diameter of the central hole of the contact arm.

[0013] In one embodiment of this disclosure, the handheld portion is a cylinder extending along the axial direction of the frustum segment, and the diameter of the handheld portion is equal to the diameter of the end face of the small end.

[0014] In one embodiment of this disclosure, the diameter of the handheld portion is smaller than the inner diameter of the plum blossom contact in its natural state, and the end face diameter of the large end is larger than the inner diameter of the plum blossom contact in its natural state.

[0015] In one embodiment of this disclosure, the clamp includes an open ring with two ends extending outward to form two ear plates. Each ear plate has a through hole, and the adjusting component passes through the through hole to adjust the relative distance between the two ear plates, thereby adjusting the inner diameter of the clamp.

[0016] In one embodiment of this disclosure, the adjusting assembly includes a bolt and a nut adapted to the bolt, the bolt passing sequentially through through holes in two of the lugs and engaging with the nut.

[0017] One of the beneficial effects of this disclosure is that the disassembly and assembly device for the plum blossom contact of this disclosure has a disassembly tool that uses a clamp with an opening and an adjustment component to use the clamp to hug the outer side of the contact plate when disassembling the plum blossom contact. The size of the clamp opening is then adjusted to provide uniform pressure to the outer side of the contact plate, so that the outer side of the contact plate is tightened. Since the annular support of the plum blossom contact provides support for the contact plate, the inner side of the contact plate can overcome the spring force of the plum blossom contact and lift up, disengaging from the mounting groove of the contact arm. The operator can then remove the plum blossom contact.

[0018] The reassembly component of the disassembly and assembly device for the plum blossom contact disclosed herein allows the operator to hold the small end of the frustum section and insert the positioning part of the large end of the frustum section into the center hole of the contact arm for pre-positioning. Then, the operator holds the plum blossom contact through the hand-held part and moves the plum blossom contact from the small end to the large end through the frustum section. Under the action of the frustum section, the contact plate overcomes the spring force of the plum blossom contact and expands evenly, thereby pushing the plum blossom contact to the inner side of the contact plate so that it can be locked into the mounting groove of the contact arm. The plum blossom contact is thus installed on the contact arm.

[0019] The disassembly and assembly device for the plum blossom contact disclosed herein has a simple structure, making it suitable for on-site replacement of plum blossom contacts. During use, it is easy to operate, convenient and efficient to disassemble and assemble, and can ensure the structural stability of the plum blossom contact, prevent damage to the spring, ensure the safety of operators, and improve the installation quality. It is a practical tool. Attached Figure Description

[0020] Embodiments of this disclosure are illustrated in conjunction with the accompanying drawings, which are included and form part of this specification, and together with their description serve to explain the principles of this disclosure.

[0021] Figure 1 This is a schematic diagram of the structure of a disassembly tool provided in an embodiment of this disclosure;

[0022] Figure 2 This is a schematic diagram of the structure of a reassembly component provided in an embodiment of this disclosure;

[0023] Figure 3 This is a schematic diagram of the structure of a disassembly tool provided in another embodiment of this disclosure.

[0024] Figures 1 to 3 The correspondence between the component names and the reference numerals in the figures is as follows:

[0025] 1. Disassembly tools; 11. Clamps; 12. Adjustment components;

[0026] 2. Reloading parts, 21. Frustum section, 22. Positioning part, 23. Hand-held part. Detailed Implementation

[0027] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0028] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0030] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0032] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0033] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0034] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0035] It should be noted that when describing the structure of the disassembly and assembly device for the plum blossom contact, the directional terms used in this article are based on the relative positions of the plum blossom contact and the contact arm. The direction in which the plum blossom contact is closer to the contact arm is called "inner," and the direction in which the plum blossom contact is farther away from the contact arm is called "outer."

[0036] High-voltage switches are key equipment in power systems used for controlling, switching on, and protecting high-voltage circuits. They are mainly used in power generation, transmission, distribution, and industrial power applications. The L-shaped contact is a crucial component in high-voltage switchgear, providing conductive and mechanical connections. During the maintenance of high-voltage switches, it is essential to monitor the working condition of the L-shaped contacts, such as overheating, discoloration, or poor contact. If any abnormalities are found, the contacts must be replaced promptly to ensure the normal operation of the high-voltage switch.

[0037] In the existing process of disassembling and assembling the plum blossom contact, operators usually use a screwdriver to pry the spring on the plum blossom contact to disassemble and assemble the contact. However, during disassembly and installation, due to uneven force distribution, the plum blossom contact body structure is very easy to loosen, which may lead to the overall frame falling apart. More seriously, the spring is very easy to undergo plastic deformation or even breakage under unbalanced load, making the disassembly and assembly of the plum blossom contact difficult and inefficient.

[0038] To address this, this disclosure provides a disassembly and assembly device for a plum blossom contact. The plum blossom contact is used to mount on a contact arm. The disassembly and assembly device includes a disassembly tool and a reassembly component. The disassembly tool includes a clamp with an opening and an adjustment assembly. The clamp is configured to wrap around the outside of the contact piece of the plum blossom contact mounted on the contact arm. The adjustment assembly is configured to adjust the opening size of the clamp under external force, so that the outside of the contact piece is tightened. This causes the contact piece, supported by the annular support frame of the plum blossom contact, to tilt up and disengage from the mounting groove of the contact arm at the inner side of the contact piece that contacts the contact arm, overcoming the spring force of the plum blossom contact. The reassembly component has a frustum section. The large end of the frustum section extends in a direction away from the frustum section to form a positioning part, and the small end of the frustum section extends in a direction away from the frustum section to form a handle. The reassembly component is configured to insert the positioning part into the central hole of the contact arm for pre-positioning under external force, and to move the plum blossom contact through the handle and in the direction from the small end to the large end, so that the inner side of the contact piece expands to be engaged in the mounting groove, overcoming the spring force of the plum blossom contact.

[0039] The disassembly and assembly device for the plum blossom contact disclosed herein includes a disassembly tool with an open clamp and an adjustment component. When disassembling the plum blossom contact, the clamp is used to wrap around the outer side of the contact plate of the plum blossom contact, and the size of the clamp opening is adjusted to provide uniform pressure to the outer side of the contact plate, thereby tightening the outer side of the contact plate. Since the annular support of the plum blossom contact provides support for the contact plate, the inner side of the contact plate can overcome the spring force of the plum blossom contact and lift up, disengaging from the mounting groove of the contact arm, so that the operator can remove the plum blossom contact.

[0040] The reassembly component of the disassembly and assembly device for the plum blossom contact disclosed herein allows the operator to hold the small end of the frustum section and insert the positioning part of the large end of the frustum section into the center hole of the contact arm for pre-positioning. Then, the operator holds the plum blossom contact through the handheld part and moves the plum blossom contact from the small end to the large end through the frustum section. Under the action of the frustum section, the inner side of the contact plate overcomes the spring force of the plum blossom contact and expands evenly, thereby pushing the plum blossom contact to the inner side of the contact plate so that it can be locked into the mounting groove of the contact arm. The plum blossom contact is thus installed on the contact arm.

[0041] The disassembly and assembly device for the plum blossom contact disclosed herein has a simple structure, making it suitable for on-site replacement of plum blossom contacts. During use, it is easy to operate, convenient and efficient to disassemble and assemble, and can ensure the structural stability of the plum blossom contact, prevent damage to the spring, ensure the safety of operators, and improve the installation quality. It is a practical tool.

[0042] For ease of understanding, please refer to the following: Figures 1 to 3 The specific structure and working principle of the dehydration device provided in this disclosure will be described in detail with reference to the embodiments.

[0043] In one embodiment, this disclosure provides a disassembly and assembly device for a plum blossom contact. The plum blossom contact is used to mount on a contact arm. The disassembly and assembly device includes a disassembly tool 1 and a reassembly component 2. The disassembly tool includes a clamp 11 with an opening and an adjusting component 12. The clamp 11 is configured to wrap around the outside of the contact piece of the plum blossom contact mounted on the contact arm. The adjusting component 12 is configured to adjust the size of the opening of the clamp under external force, so that the outside of the contact piece is tightened, thereby causing the inner side of the contact piece in contact with the contact arm to be tightened under the support of the annular support frame of the plum blossom contact. The spring force of the pentagonal contact lifts it up and disengages it from the mounting groove of the contact arm; the reinstallation part 2 has a frustum section 21, the large end of the frustum section 21 extends in a direction away from the frustum section 21 to form a positioning part 22, and the small end of the frustum section 21 extends in a direction away from the frustum section 21 to form a holding part 23. The reinstallation part 2 is configured to insert the positioning part 22 into the center hole of the contact arm for pre-positioning under the action of external force, and to make the pentagonal contact move through the holding part 23 and move in the direction from the small end to the large end, so that the inner side of the contact plate expands to be engaged in the mounting groove against the spring force of the pentagonal contact.

[0044] Specifically, the plum blossom contact is a key conductive component used in high-voltage vacuum circuit breakers, intermediate-voltage switchgear, and other equipment. Its structure consists of a non-magnetic stainless steel annular support frame, high-conductivity contact pieces (such as T2 copper plates precision-stamped and thickly silver-plated), and annular pressure springs. The high-conductivity contact pieces are evenly distributed along the annular support frame and fixed by slots or riveting, forming a stepped or grooved fit with the support frame to ensure symmetrical and radially stable arrangement. The inner edge of the high-conductivity contact piece forms line contact with the conductive rod of the stationary contact arm. The annular pressure spring (made of non-magnetic stainless steel) is fitted onto the outside of the high-conductivity contact piece and connected to the support frame by a binding design (such as clips or screws), applying pressure evenly to force the high-conductivity contact piece to contract inward, increasing the contact pressure between the high-conductivity contact piece and the stationary contact. The components are connected through mechanical fitting and elastic pressure transmission. The support frame restricts the displacement of the highly conductive contact piece. The annular spring expands rapidly through the tooling and locks with the outer ring of the highly conductive contact piece, ultimately forming a conductive structure with multi-point contact and balanced pressure. This significantly reduces contact resistance and improves resistance to short-circuit impacts, and is widely used in 10kV-35kV power systems.

[0045] Combination Figure 1The disassembly and assembly device for the plum blossom contact disclosed herein includes a disassembly tool 1 with an open clamp 11 and an adjustment component 12. When disassembling the plum blossom contact, the clamp 11 is used to wrap around the outer side of the contact plate of the plum blossom contact. The size of the opening of the clamp 11 is adjusted by the adjustment component 12, and the clamp 11 is tightened to tighten the outer edge of the contact plate of the plum blossom contact. Since the plum blossom contact has an annular support frame, under the support of the annular support frame, the inner edge of the contact plate can overcome the spring force of the plum blossom contact spring and lift up. The inner side of the contact plate separates from the contact arm mounting groove, and the plum blossom contact is thus separated from its mounted contact arm. Afterward, the operator can remove the plum blossom contact without causing the plum blossom contact to fall apart or damaging the spring of the plum blossom contact.

[0046] Combination Figure 2 The reassembly part 2 of the plum blossom contact disassembly and assembly device disclosed herein allows the operator to hold the hand-held part 23 at the small end of the frustum section 21 and insert the positioning part 22 extending from the large end of the frustum section 21 into the center hole of the contact arm for pre-positioning. Then, the operator holds the plum blossom contact through the hand-held part 23, causing the plum blossom contact to move from the small end to the large end through the frustum section 21. Under the action of the frustum section 21, the contact piece overcomes the spring force of the plum blossom contact and expands evenly. The inner side of the contact piece can thus expand, thereby pushing the plum blossom contact until the contact piece is inserted into the mounting groove of the contact arm. In this way, the plum blossom contact is installed on the contact arm.

[0047] The disassembly and assembly device for the plum blossom contact disclosed herein has a simple structure, making it suitable for on-site replacement of plum blossom contacts. During use, it is easy to operate, convenient and efficient to disassemble and assemble, and can ensure the structural stability of the plum blossom contact, prevent damage to the spring, ensure the safety of operators, and improve the installation quality. It is a practical tool.

[0048] Furthermore, the clamp 11 can be made of carbon steel or stainless steel. Carbon steel is relatively inexpensive, has good mechanical strength, can withstand large loads and impacts, and is easy to cut, bend, and form. Stainless steel (such as 304 and 316) has high tensile strength and impact resistance, and can withstand large loads and vibrations. Those skilled in the art can determine the material based on the ability to tighten the edge of the contact piece, and this disclosure does not limit this.

[0049] Meanwhile, the reinstallation component 2 can be made of resin (or wood, plastic, etc.) and machined in one piece. These materials are relatively soft and lightweight, thus avoiding damage to the sprite contact during reinstallation.

[0050] See Figure 2 In one embodiment of this disclosure, the ratio of the end face diameter of the large end to the outer diameter of the contact arm is 1:1 to 1.2:1.

[0051] In detail, by controlling the ratio of the end face diameter of the large end of the reinstallation component 2 to the outer diameter of the contact arm to be within the range of 1:1-1.2:1, the plum blossom contact can be fully expanded under uniform expansion, thus enabling it to be successfully installed on the contact arm. Furthermore, the end face diameter of the large end of the reinstallation component 2 will not be too small, resulting in insufficient expansion of the plum blossom contact and failure to be installed on the contact arm. Alternatively, the end face diameter of the large end of the reinstallation component 2 will not be too large, resulting in excessive expansion of the plum blossom contact, causing excessive stretching of the spring in the plum blossom contact and damage. Or, at the moment of installation on the contact arm, the spring recovery generates excessive elastic force, causing damage to both the plum blossom contact and the contact arm.

[0052] See Figure 2 In one embodiment of this disclosure, the diameter of the end face of the large end is equal to the outer diameter of the contact arm.

[0053] In this way, the end face diameter of the large end of the reinstallation part 2 is equal to the outer diameter of the contact arm, which enables the plum blossom contact to be installed stably and smoothly on the contact arm, and will not cause the spring of the plum blossom contact to generate too much elastic force, causing the plum blossom contact and the contact arm to vibrate, reducing damage and extending the service life of the plum blossom contact.

[0054] See Figure 2 In one embodiment of this disclosure, the angle between the generatrix of the frustum segment 21 and the axis is 15°-30°.

[0055] In detail, by adjusting the angle between the generatrix of the frustum section 21 and the axis, the resistance encountered when reinstalling the sprite contact can be adjusted, and friction can be reduced through gradual expansion. When the angle is smaller, the resistance encountered by the operator is smaller, and the expansion of the sprite contact is smoother, but the required path is longer; when the angle is larger, the resistance encountered by the operator is larger, and the expansion of the sprite contact requires more force, but the required path is shorter.

[0056] See Figure 2 In one embodiment of this disclosure, the positioning part 22 is a cylinder extending along the axis of the frustum segment 21, and the gap between the positioning part 22 and the central hole is 0-0.1mm.

[0057] Since the positioning part 22 is a cylinder extending along the axis of the frustum section 21, it fits tightly with the center hole of the contact arm, avoiding offset or tilting caused by local contact. The reinstallation part 2 can be stably fixed on the contact arm without shaking. At the same time, the extremely small gap (0-0.1mm) between the positioning part 22 and the center hole can achieve a near-clearance fit, effectively eliminating positioning errors caused by gaps, ensuring axial alignment and minimizing angular deviation. Furthermore, by setting a certain gap, the resistance during installation of the reinstallation part 2 is reduced without affecting its positioning performance.

[0058] See Figure 2In one embodiment of this disclosure, the diameter of the positioning part 22 is equal to the diameter of the central hole of the contact arm.

[0059] In this way, the diameter of the positioning part 22 is equal to the diameter of the center hole of the contact arm, which can ensure that the axes of the two are completely coincident during assembly, avoid eccentricity or tilting caused by diameter difference, make the contact surface of the reinstallation part 2 uniformly stressed, avoid local stress concentration (such as edge stress), thereby reducing the risk of fatigue fracture of the positioning part 22 and improving stability.

[0060] See Figure 2 In one embodiment of this disclosure, the handheld portion 23 is a cylinder extending along the axial direction of the frustum segment 21, and the diameter of the handheld portion 23 is equal to the diameter of the end face of the small end.

[0061] In detail, the hand-held part 23 is a cylinder extending along the axis of the frustum section 21, which makes it more convenient for the operator to hold. When force is applied, the structure with a consistent diameter can bring the center of gravity closer to the grip point, reducing hand fatigue. The hand-held part 23 has the same diameter as the small end, and the transition at the connection is smooth, avoiding stress concentration caused by abrupt changes in cross-section, reducing the risk of breakage. The consistent diameter design can reduce the number of times the lathe is machined or the mold is adjusted, thus improving production efficiency.

[0062] See Figure 2 In one embodiment of this disclosure, the diameter of the handheld portion 23 is smaller than the inner diameter of the plum blossom contact in its natural state, and the end face diameter of the large end is larger than the inner diameter of the plum blossom contact in its natural state.

[0063] Thus, the diameter of the hand-held part 23 is smaller than the inner diameter of the plum blossom contact in its natural state. When installing the plum blossom contact, the plum blossom contact can be fitted onto the reinstallation part 2, thereby pushing the plum blossom contact to move along its installation direction. The end face diameter of the large end is larger than the inner diameter of the plum blossom contact in its natural state, so the plum blossom contact can be expanded by the reinstallation part 2, and thus successfully installed onto the contact arm under the action of the reinstallation part 2.

[0064] See Figure 1 In one embodiment of this disclosure, the clamp 11 includes a ring with an opening, and two ends of the ring extend outward to form two ear plates. Each ear plate has a through hole, and the adjusting component 12 passes through the through hole to adjust the relative distance between the two ear plates, thereby adjusting the inner diameter of the clamp 11.

[0065] In detail, by adjusting the relative distance between the ear plates, the clamp 11 can be adapted to pendulum contacts of different diameters without the need for individual customization for each size, significantly improving versatility. The adjustment component 12 can ensure that the clamp 11 fits tightly with the edge of the pendulum contact plate.

[0066] Further, see Figure 3An arc-shaped support member can be provided at the opening of the clamp 11 to cooperate with the clamp 11. The support member is fixedly connected to one end of the circular opening, and the other end of the support member is provided with a sliding groove that matches the width of the circular ring. It abuts against and slides with the other end of the circular opening. In this way, when the diameter of the plum blossom contact is large, the two ear plates of the clamp 11 do not fit together, but the support member can still provide uniform pressure to the plum blossom contact. The contact plate at this point will not be unloaded due to the opening. At the same time, the support member can slide along the other end of the clamp 11 to adjust the inner diameter of the clamp 11, which greatly increases the applicability of the disassembly tool 1 disclosed herein.

[0067] See Figure 2 In one embodiment of this disclosure, the adjusting assembly 12 includes a bolt and a nut adapted to the bolt, the bolt passing sequentially through through holes in two lugs and engaging with the nut.

[0068] In detail, the adjusting component 12 can use a double-ended bolt (threaded at both ends) or a single-ended bolt + nut combination, depending on the force direction of the clamp 11 and the adjustment requirements. By rotating the nut, the adjustment amount of the ear plate spacing can be precisely controlled. The bidirectional engagement of the bolt and nut allows the inner diameter to increase or decrease, adapting to objects of different sizes. The operation is simple, and the bolt and nut can be replaced individually, avoiding overall scrap due to wear or damage, reducing maintenance costs. Loosening can be prevented by adding a lock nut, spring washer, or threadlocker.

[0069] The working principle of the disassembly and assembly device for the plum blossom contact will be further explained next using an application scenario of disassembly and assembly of the plum blossom contact.

[0070] During maintenance, when operators disassemble the sprite contact that needs to be replaced, they use the clamp 11 of disassembly tool 1 to wrap around the outside of the sprite contact plate. Then, they use an electric wrench (or a regular wrench) to tighten the bolts and nuts, thereby reducing the inner diameter of the clamp 11 and providing uniform pressure to the outside of the contact plate. Furthermore, with the support of the sprite contact's annular support frame, the inner side of the sprite contact plate can overcome the elastic force of the sprite contact spring and lift up, separating the contact plate from the mounting groove of the contact arm and separating the sprite contact from the head of the contact arm. As a result, the operator can easily remove the sprite contact.

[0071] Next, the operator installs the pentagonal contact. First, the operator holds the handle 23 of the reinstallation part 2 and inserts the positioning part 22 of the large end of the reinstallation part 2 into the center hole of the contact arm, so that the reinstallation part 2 is positioned. Then, the operator controls the pentagonal contact to be installed to be pushed from the small end to the large end through the handle 23, so that the pentagonal contact passes through the small end of the frustum section 21, the frustum section 21, and the large end of the frustum section 21 in sequence. Under the action of the frustum section, the inner side of the contact piece can expand, thereby pushing the pentagonal contact into the mounting groove inside the contact piece. In this way, the pentagonal contact is installed on the contact arm.

[0072] The disassembly and assembly device for the plum blossom contact disclosed herein has a simple structure, making it suitable for on-site replacement of plum blossom contacts. During use, it is easy to operate, convenient and efficient to disassemble and assemble, and can ensure the structural stability of the plum blossom contact, prevent damage to the spring, ensure the safety of operators, and improve the installation quality. It is a practical tool.

[0073] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A device for assembling and disassembling a plum blossom contact, wherein the plum blossom contact is used to install on a contact arm, characterized in that, The disassembly and assembly device includes a disassembly tool (1) and a reassembly component (2), wherein: The disassembly tool (1) includes a clamp (11) with an opening and an adjustment assembly (12). The clamp (11) is configured to wrap around the outside of the contact piece of the quincunx contact mounted on the contact arm. The adjustment assembly (12) is configured to adjust the size of the opening of the clamp (11) under the action of an external force so that the outside of the contact piece is tightened, thereby causing the contact piece to be supported by the annular support frame of the quincunx contact, and the inner side of the contact piece that contacts the contact arm overcomes the spring force of the quincunx contact and disengages from the mounting groove of the contact arm. The reinstallation component (2) has a frustum section (21), the large end of the frustum section (21) extends in a direction away from the frustum section (21) to form a positioning part (22), and the small end of the frustum section (21) extends in a direction away from the frustum section (21) to form a handhold part (23). The reinstallation component (2) is configured to insert the positioning part (22) into the center hole of the contact arm for pre-positioning under the action of external force, and to move the plum blossom contact through the handhold part (23) in the direction from the small end to the large end, so that the inner side of the contact plate expands against the spring force of the plum blossom contact to be inserted into the mounting groove.

2. The disassembly and assembly device for the plum blossom contact according to claim 1, characterized in that, The ratio of the diameter of the end face of the large end to the outer diameter of the contact arm is 1:1 to 1.2:

1.

3. The disassembly and assembly device for the plum blossom contact according to claim 2, characterized in that, The diameter of the end face of the large end is equal to the outer diameter of the contact arm.

4. The disassembly and assembly device for the plum blossom contact according to claim 2, characterized in that, The angle between the generatrix and the axis of the frustum segment (21) is 15°-30°.

5. The disassembly and assembly device for the plum blossom contact according to any one of claims 1 to 4, characterized in that, The positioning part (22) is a cylinder extending along the axis of the frustum section (21), and the gap between the positioning part (22) and the center hole is 0-0.1mm.

6. The disassembly and assembly device for the plum blossom contact according to claim 5, characterized in that, The diameter of the positioning part (22) is equal to the diameter of the central hole of the contact arm.

7. The disassembly and assembly device for the plum blossom contact according to claim 5, characterized in that, The handheld part (23) is a cylinder extending along the axis of the frustum section (21), and the diameter of the handheld part (23) is equal to the diameter of the end face of the small end.

8. The disassembly and assembly device for the plum blossom contact according to claim 7, characterized in that, The diameter of the handheld part (23) is smaller than the inner diameter of the plum blossom contact in its natural state, and the end face diameter of the large end is larger than the inner diameter of the plum blossom contact in its natural state.

9. The disassembly and assembly device for the plum blossom contact according to claim 1, characterized in that, The clamp (11) includes an open ring with two ends extending outward to form two ear plates. Both ear plates have through holes. The adjusting component (12) passes through the through holes to adjust the relative distance between the two ear plates, thereby adjusting the inner diameter of the clamp (11).

10. The disassembly and assembly device for the plum blossom contact according to claim 9, characterized in that, The adjusting assembly (12) includes a bolt and a nut adapted to the bolt, the bolt passing through through holes in the two lugs in sequence, and then engaging with the nut.

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