Quick-changing device for guider of electric spark small hole machine

Abstract

The utility model discloses a quick-changing device for a guider of an electric spark small hole machine, which comprises a guide sleeve seat, a closed cavity is arranged in the guide sleeve seat, the upper end of the closed cavity is open, the bottom of the guide sleeve seat is coaxially provided with an inserting hole along the vertical direction, and the lower end of the closed cavity is communicated with the upper end of the inserting hole; the guide device further comprises a guide positioning piece and a guide device sleeve. The guide positioning piece is inserted into the closed cavity from top to bottom, the upper end of the guide positioning piece is hermetically assembled with the open end of the closed cavity, and the lower end of the guide positioning piece is inserted into the insertion hole for coaxial positioning; rapid positioning of the guider sleeve can be achieved through matching of the alignment groove and the guider sleeve, and meanwhile rapid fixing operation in the positioning process can be achieved through matching of the piston, the limiter and the guider sleeve. According to the utility model, through the cooperation of the piston and the plurality of bosses, when the guider sleeve is disassembled, the guider sleeve can be loosened and pushed away from the guide positioning piece.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric processing equipment, concretely relates to a quick change device of electric spark small hole machine guider. BACKGROUND

[0002] With the increasing demand of aerospace industry and mould industry for small hole processing, not only the high precision of processing small hole is required, but also the small hole machine is required to be integrated into the automatic production line of factory to realize unmanned processing.

[0003] When the electric spark small hole machine processes small hole, the electrode wire needs to pass through the guider, and the path of the electrode wire is guided by the guider to ensure the processing precision of the small hole; when processing small holes of different diameters, electrode wires of different diameters need to be selected, and electrode wires of different diameters need to match guiders of different diameters, and when the electrode wire needs to be replaced, the guider also needs to be replaced accordingly; therefore, each electric spark small hole machine is equipped with multiple guiders of different specifications and different models. Usually, only one kind of guider is installed on the machine tool, and the remaining guiders are stored in the tool cabinet or tool library near the machine tool.

[0004] For example, the patent document with the application number CN2022212072104 discloses a guiding device of electric spark small hole machine, which shows the centering assembly operation between the guider, the mandrel and the connecting seat (i.e. the guider sleeve and the guide sleeve seat in the present application). At the same time, the guiding device sets up the wire supporting assembly in the electrode wire conveying direction, which can not only ensure the smooth passing of the electrode wire through the guiding assembly during the electrode wire threading operation, but also limit the swing of the electrode wire during the rotation of the electrode wire, solving the problem of poor precision of the processed small hole. Secondly, according to the specification of the patent document Figure Four It can be known that the taper groove matched with the connecting seat is arranged in the inside of the mandrel to assemble and position the connecting seat, so as to solve the problem of poor positioning effect of the guider sleeve and the guide sleeve seat during the centering operation of the guider sleeve and the guide sleeve seat, and the position of the guider sleeve and the guide sleeve seat needs to be adjusted for many times.

[0005] Although the technical scheme disclosed in the above patent document solves the problem of processing precision and part of the problem in the assembly process, there are still limitations in actual use:

[0006] For example, the mandrel and the connecting seat in the above patent document (i.e. the guide sleeve and the guide sleeve seat in the present application) are limited by elastic pins or limiting steel balls when fixed (the elastic pins or limiting steel balls are usually arranged on the guide sleeve seat, and once the guide sleeve is assembled with the guide sleeve seat, the elastic pins or limiting steel balls are clamped and fixed on the outer side wall of the guide sleeve), and when replacement is needed, the elastic pins or limiting steel balls are usually guided to be separated from the limitation of the guide sleeve, but since the elastic pins or limiting steel balls are arranged in the guide sleeve seat, the human eye cannot determine whether the limiting structure is fully separated at the first time, so sometimes the guide sleeve is forcibly pulled out under the condition of insufficient separation, which causes the guide sleeve and the limiting structure to be damaged.

[0007] Therefore, how to solve the above-mentioned problems of the prior art has become a research topic of the present utility model. Utility model content

[0008] The utility model provides a kind of electric spark small hole machine guide quick-change device, to solve the technical problem presented in the above background art.

[0009] To achieve the above object, the utility model adopts the technical scheme that a kind of electric spark small hole machine guide quick-change device, including guide sleeve seat, the guide sleeve seat has a closed chamber, the upper end of this closed chamber is open, the bottom of the guide sleeve seat is coaxially provided with a plug-in hole along up and down direction, the lower end of the closed chamber is communicated with the upper end of the plug-in hole;

[0010] Further including guide positioning member and guide sleeve;The guide positioning member is inserted into closed chamber from top to bottom, and its upper end is sealingly assembled with the open end of closed chamber, and its lower end is inserted into the plug-in hole and positioned coaxially;The guide sleeve is coaxially assembled with the guide positioning member, and its upper end is inserted into the lower end of the guide positioning member and extends to the inside of guide positioning member;

[0011] Further including piston, elastic member and limiter;

[0012] The piston is annularly sleeved on the outer circumferential side of the guide positioning member, and is slidingly arranged relative to the axis direction of the guide positioning member;The upper end of the elastic member acts on the piston, and the lower end acts on the bottom of the guide sleeve seat, so that the piston maintains a tendency of upward movement;The limiter is movably arranged between the guide positioning member and the piston;

[0013] Further including three positioning portions for positioning the limiter;The first positioning portion is arranged on the circumferential side of the guide positioning member, the second positioning portion is arranged on the inner side wall of the piston, and the third positioning portion is arranged on the outer circumferential surface of the guide sleeve.

[0014] The piston has two states of lifting and lowering:

[0015] In the lifting state, the first positioning part and the third positioning part are horizontally aligned, at which time the restrictor is positioned by the first positioning part and the third positioning part together, and the guide sleeve is stationary relative to the guide positioning member;

[0016] In the lowering state, the second positioning part is lowered to be horizontally aligned with the first positioning part and the third positioning part, at which time the restrictor is released from the horizontal positioning, and the guide sleeve can move axially and push the restrictor radially into the second positioning part and the first positioning part for positioning;

[0017] The bottom of the piston is provided with a boss, and the bottom of the guide sleeve seat is provided with a through slot corresponding to the boss, and in the lowering state of the piston, the boss extends downward out of the through slot and abuts against the guide sleeve, thereby exerting a downward pushing force on the guide sleeve.

[0018] In the above technical solution, the explanation of the related content is as follows:

[0019] In the above technical solution, the closed chamber is generally annular, which can ensure the stability of each area during the movement of the piston.

[0020] In a further technical solution, the guide positioning member includes a shaft head and a shaft body coaxially arranged, the shaft head is sealingly assembled with the open end of the closed chamber, and the lower end of the shaft body is inserted into the insertion hole.

[0021] The piston is annularly sleeved on the outer periphery of the shaft body.

[0022] The shaft body is internally coaxially provided with an alignment slot, and the slot opening of the alignment slot is located at the bottom of the shaft body, and the guide sleeve is positioned in the alignment slot, thereby enabling the guide sleeve to be quickly centered and positioned when inserted into the alignment slot.

[0023] In the above technical solution, the bottom end of the shaft body is flush with the bottom end of the insertion hole or has a certain distance from the bottom end of the insertion hole, thereby enabling the guide sleeve to be inserted into the alignment slot without bumping the bottom end of the shaft body.

[0024] In the above technical solution, the shaft head and the guide sleeve seat can be fixed by screws.

[0025] In the above technical solution, the restrictor can only slide along the axis of the accommodation hole, i.e., in the radial direction of the shaft body.

[0026] In the above technical solution, the cross section of the alignment slot can be in the shape of a truncated cone, so that the guide sleeve can be provided with a matching structure, so that the guide sleeve can be quickly centered and positioned when inserted into the alignment slot.

[0027] In a further technical solution, the guide sleeve comprises a plug-in connector that is provided in matching relationship with the alignment slot, the outer peripheral wall of the plug-in connector is provided with a fastening groove for accommodating the limiter, the outer peripheral wall of the plug-in connector at the end away from the alignment slot is provided with a stabilizing ring, and the upper end surface of the stabilizing ring is provided in corresponding relationship with the bottom end of the boss. With this design, the plug-in connector in the guide sleeve can be quickly connected with the alignment slot.

[0028] In a further technical solution, the first positioning part is an accommodating hole provided on the outer peripheral wall of the rod body.

[0029] The second positioning part is a ring groove provided along the inner side wall of the piston and surrounding the rod body.

[0030] The third positioning part is a fastening groove provided on the outer peripheral wall of the plug-in connector.

[0031] In a further technical solution, the accommodating hole comprises a sliding section provided on the outer peripheral wall of the rod body, the inner side wall of the alignment slot is provided with a necked section, the necked section is in communication with the sliding section, and the width of the necked section is smaller than the width of the sliding section, so as to block the limiter from being separated from the sliding section. With this design, the limiter will not be separated from the accommodating hole during replacement of the guide sleeve.

[0032] In a further technical solution, the limiter is in the shape of a ball, and the diameter of the limiter is equal to that of the sliding section, but in actual use, the limiter needs to satisfy the condition that when the piston pushes the limiter into the fastening groove, the side wall of the limiter is tangent to the inclined surface of the fastening groove on the guide sleeve, so as to limit the guide sleeve.

[0033] In a further technical solution, the diameter of the limiter is smaller than that of the necked section, and when the side wall of the limiter is blocked by the necked section, the side wall of the limiter is in abutment with the inner side wall of the ring groove on the guide sleeve. With this design, the limiter is limited in position while also satisfying the fixation of the guide sleeve.

[0034] In a further technical solution, the rod head is provided with a gas guide hole for guiding high-pressure gas into the closed chamber. When the gas has not entered the closed chamber, the elastic force of the elastic member is greater than the gravity of the piston, and the piston will not slide downward. Once the high-pressure gas is guided into the closed chamber, the pressure in the closed chamber will gradually increase. When the pressure is greater than the elastic force of the elastic member, the piston can be designed to press the elastic member.

[0035] After the operation of extruding the elastic member is completed, the elastic member can be restored to the state before being extruded, i.e.

[0036] Further technical solutions, the bottom end face of the piston and the bottom of the closed chamber form a plurality of anti-deviation grooves for limiting the axial deviation of the elastic member.

[0037] As for the "first", "second", etc. used herein, it is not intended to particularly indicate the order or sequence, nor to limit the present application, but only to distinguish the components or operations described by the same technical terms.

[0038] As for the "connection" or "positioning" used herein, it can mean that two or more components or devices are in direct physical contact with each other or indirectly in physical contact with each other, or it can mean that two or more components or devices are in operation or action with each other.

[0039] As for the "contain", "include", "have" and the like used herein, they are all open terms, i.e. they mean containing but not limited to.

[0040] As for the words (terms) used herein, except for special notes, they generally have the usual meaning of each word used in this field, in the content of the present application and in the special content. Some words used to describe the present application will be discussed below or elsewhere in the specification to provide additional guidance for those skilled in the art on the description of the present application.

[0041] As for the "front", "back", "up", "down", "left", "right" and the like used herein, they are all directional words, which are only used to illustrate the positional relationship between structures in the present application, and are not used to limit the protection scheme and the specific direction of the actual implementation of the present application.

[0042] The working principle and advantages of the utility model are as follows:

[0043] The utility model discloses a quick positioning operation in the process of positioning can be realized through the cooperation of the piston, the limiter and the guide sleeve, and the quick positioning operation is realized through the cooperation of the alignment slot and the guide sleeve, simultaneously, the piston, the limiter and the guide sleeve are matched, and the quick fixing operation in the positioning process can be realized, specifically, because the elastic member is in the relaxed state under normal circumstances, the piston side wall can simultaneously exert the pushing force to all limiters at this time, in order to make the guide sleeve convenient to install, therefore, directly guide the piston to slide down along the shaft axis direction, make the elastic member enter the compression state from the relaxed state, at this time, the ring groove on the piston is aligned with all limiters, then, the guide sleeve is inserted into the alignment slot, and the alignment slot guides the guide sleeve axis to coincide with the guide positioning piece axis through the side wall in its own interior to realize positioning, subsequently, guide the elastic member to enter the relaxed state, make the piston side wall push all limiters to be clamped into the ring groove on the guide sleeve simultaneously to realize the quick fixing of the guide sleeve.

[0044] The utility model discloses the cooperation of piston and a plurality of bosses can realize the operation of unfastening the guide sleeve and pushing the guide sleeve away from the guide positioning piece simultaneously when the guide sleeve is disassembled, specifically, when the guide sleeve and the guide positioning piece are assembled, the elastic member is in the relaxed state at this time, all bosses are located in the closed chamber, and the piston pushes all limiters to abut against the outside of the guide sleeve simultaneously to make the guide sleeve be fixed by the limiter (the boss or the recess can be arranged on the guide sleeve to complete the fixing operation with the limiter). When the guide sleeve needs to be disassembled, directly guide the elastic member to enter the compression state, the limiter enters the ring groove at this time, and the restriction to the guide sleeve is released, and every boss is out of the closed chamber to make the guide sleeve separate from the guide positioning piece. ACCREDITED DRAWINGS

[0045] ATTACH Figure 1 It is the structure schematic diagram of the boss in the utility model embodiment;

[0046] ATTACH Figure 2 It is Figure 1 It is the longitudinal section structure schematic diagram of A-A place after installing the guide positioning piece in the utility model embodiment;

[0047] ATTACH Figure 3 It is Figure 1 It is the longitudinal section structure schematic diagram of A-A place after disassembling the guide positioning piece in the utility model embodiment;

[0048] ATTACH Figure 4 It is the longitudinal section structure schematic diagram of the guide sleeve seat in the utility model embodiment;

[0049] ATTACH Figure 5 It is the overhead structure schematic diagram of the guide positioning piece in the utility model embodiment;

[0050] ATTACH Figure 6 It is Figure 5 It is the longitudinal section structure schematic diagram of B-B in the utility model embodiment;

[0051] Figure 2 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment; Figure 7 Figure 3 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment;

[0052] Figure 4 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment; Figure 8 Figure 5 is a perspective view of the guide sleeve set according to the utility model embodiment;

[0053] Figure 6 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment; Figure 9 Figure 7 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment;

[0054] Figure 8 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment; Figure 10 Figure 9 is a partial enlarged view of the C-C position in Figure 8; Figure 9 Figure 10 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment;

[0055] Figure 11 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment; Figure 11 Figure 12 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment; Figure 10 Figure 13 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment;

[0056] Figure 14 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment; Figure 12 Figure 15 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment;

[0057] Figure 16 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment; Figure 13 Figure 17 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment;

[0058] Figure 18 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment; Figure 14 Figure 19 is a longitudinal sectional view of the guide sleeve of the guide sleeve set according to the utility model embodiment.

[0059] In the above drawings: 1, guide sleeve seat; 2, guide positioning member; 3, piston; 4, elastic member; 5, limiter; 6, guide sleeve; 7, closed chamber; 8, plug-in hole; 9, rod head; 10, rod body; 11, alignment groove; 12, containing hole; 13, boss; 14, plug; 15, stabilizing ring; 16, sliding section; 17, necked section; 18, air guide hole; 19, ring groove; 20, through groove; 21, fastening groove; 22, anti-deviation groove. DETAILED DESCRIPTION

[0060] The utility model will be further described below in combination with the drawings and embodiments:

[0061] Embodiment: the present case will be clearly explained below by means of drawings and detailed description, any person skilled in the art can change and modify the technology taught by the present case after understanding the embodiments of the present case, which does not deviate from the spirit and scope of the present case.

[0062] The terms in this paper are only for describing specific embodiments and are not intended to limit the present case. The singular form such as "a", "this", "this", "this" and "the" as used herein also includes the plural form.

[0063] Reference is made to the drawings Figures 1-14As shown, a kind of electric spark small hole machine guide quick-change device, including guide sleeve base 1, guide sleeve base 1 have a closed chamber 7, the upper end of the closed chamber 7 is open, the bottom of guide sleeve base 1 is coaxially provided with a plug-in hole 8 along up and down direction, the lower end of closed chamber 7 is communicated with the upper end of plug-in hole 8;

[0064] It also includes guide positioning member 2 and guide sleeve 6;Guide positioning member 2 is inserted into closed chamber 7 from top to bottom, and the upper end thereof is sealingly fitted with the open end of closed chamber 7, and the lower end thereof is inserted into plug-in hole 8 and positioned coaxially;Guide sleeve 6 is coaxially fitted with guide positioning member 2, the upper end thereof is inserted into the lower end of guide positioning member 2 and extends to the inside of guide positioning member 2;

[0065] It also includes piston 3, elastic member 4 and restrictor 5 (the number of restrictor 5 is at least two);

[0066] Piston 3 is annularly sleeved on the outer circumferential side of guide positioning member 2 and is slidingly arranged relative to the axial direction of guide positioning member 2;The upper end of elastic member 4 acts on piston 3, and the lower end thereof acts on the bottom of guide sleeve base 1, so that piston 3 maintains a tendency of upward movement;Restrictor 5 is movably arranged between guide positioning member 2 and piston 3;

[0067] It also includes three positioning portions for positioning restrictor 5;The first positioning portion is arranged on the circumferential side of guide positioning member 2, the second positioning portion is arranged on the inner side wall of piston 3, and the third positioning portion is arranged on the outer circumferential surface of guide sleeve 6;

[0068] Piston 3 has two states of lifting and lowering:

[0069] In the lifting state, the first positioning portion and the third positioning portion are horizontally aligned, at this time, the restrictor 5 is jointly positioned by the first positioning portion and the third positioning portion, and the guide sleeve 6 is stationary relative to the guide positioning member 2;

[0070] In the lowering state, the second positioning portion is lowered to be horizontally aligned with the first positioning portion and the third positioning portion, at this time, the restrictor 5 is horizontally released from the positioning, and the guide sleeve 6 can move axially and push the restrictor 5 radially into the second positioning portion and the first positioning portion for positioning by axial movement;

[0071] The bottom of piston 3 is provided with a boss 13 downwardly, and the bottom of guide sleeve base 1 is provided with a through slot 20 corresponding to the boss 13, and in the lowering state of piston 3, the boss 13 extends downwardly out of the through slot 20 and abuts against the guide sleeve 6 to apply a downward pushing force to the guide sleeve 6.

[0072] The piston 3 and the plurality of bosses 13 can simultaneously loosen the guide sleeve 6 and push the guide sleeve 6 away from the guide positioning member 2 when the guide sleeve is disassembled.

[0073] Specifically, when the guide sleeve 6 is assembled with the guide positioning member 2, the elastic member 4 is in a relaxed state at this time, all the bosses 13 are located in the closed chamber 7, and the piston 3 pushes all the limiters 5 to simultaneously abut against the outer side of the guide sleeve 6, so that the guide sleeve 6 is fixed by the limiters 5 (a protrusion or a recess can be arranged on the guide sleeve 6 to cooperate with the limiter 5 to complete the fixing operation, and the fixing is realized by cooperation of the third positioning part in this application). When the guide sleeve 6 needs to be disassembled, the elastic member 4 is directly guided into a compressed state, at this time, the limiter 5 enters the second positioning part, i.e., the ring groove 19, and the restriction on the guide sleeve 6 is released, and each boss 13 penetrates out of the closed chamber 7, so that the guide sleeve 6 is separated from the guide positioning member 2.

[0074] In some specific embodiments, the first positioning part is the accommodating hole 12 arranged on the side of the shaft body 10;

[0075] The second positioning part is the ring groove 19 arranged along the inner side wall of the piston 3 and surrounding the shaft body 10;

[0076] The third positioning part is the fastening groove 21 arranged on the outer circumferential wall of the plug 14.

[0077] In some specific embodiments, the guide positioning member 2 comprises a shaft head 9 and a shaft body 10 coaxially arranged, the shaft head 9 is sealingly assembled with the open end of the closed chamber 7; the lower end of the shaft body 10 is inserted into the plug hole 8;

[0078] The piston 3 is annularly sleeved on the outer circumferential side of the shaft body 10;

[0079] The inner part of the shaft body 10 is coaxially provided with an alignment groove 11, the slot of the alignment groove 11 is located at the bottom of the shaft body 10, and the guide sleeve 6 is arranged in the alignment groove 11.

[0080] The cross section of the alignment groove 11 can be frustum-shaped, so that the guide sleeve 6 can be provided with a matching structure, so that the guide sleeve 6 can be quickly centered and positioned when inserted into the alignment groove 11.

[0081] In some specific embodiments, as shown in Figure 6 、 Figure 7 、 Figure 12 、 Figure 13 and Figure 14 , the guide sleeve 6 comprises a plug 14 arranged in matching with the alignment groove 11, the outer circumferential wall of the plug 14 is provided with a fastening groove 21 for accommodating the limiter 5, and the outer wall of the end of the plug 14 away from the alignment groove 11 is provided with a stabilizing ring 15, and the upper end surface of the stabilizing ring 15 is arranged in correspondence with the bottom end of the boss 13.

[0082] This invention enables rapid positioning of the guide sleeve 6 through the cooperation of the alignment groove 11 and the guide sleeve 6. Simultaneously, it enables rapid fixing during the positioning process through the cooperation of the piston 3, the limiter 5, and the guide sleeve 6. Specifically, since the elastic element 4 is normally in a relaxed state, the side wall of the piston 3 simultaneously applies a pushing force to all the limiters 5. To facilitate the installation of the guide sleeve 6, the piston 3 is directly guided to slide downwards along the axis of the rod 10, causing the elastic element 4 to transition from a relaxed state to a compressed state. At this time, the annular groove 19 on the piston 3 aligns with all the limiters 5. Then, the guide sleeve 6 is inserted into the alignment groove 11. The alignment groove 11 guides the guide sleeve 6 through its internal side wall, causing the axis of the guide sleeve 6 to coincide with the axis of the guide positioning element 2, thus achieving positioning. Subsequently, the elastic element 4 is guided into a relaxed state, causing the side wall of the piston 3 to push all the limiters 5 into the fastening groove 21 on the guide sleeve 6, thereby achieving rapid fixing of the guide sleeve 6.

[0083] Both the annular groove 19 and the fastening groove 21 have an isosceles trapezoidal cross-section. When the limiter 5 is inserted into the fastening groove 21 on the guide sleeve 6, the limiter 5 is deeply inserted into the fastening groove 21. At the same time, the limiter 5 is pushed by the side wall of the piston 3 and firmly pressed against the fastening groove 21 on the guide sleeve 6. Once the elastic element 4 is about to be in a compressed state, the annular groove 19 on the piston 3 will gradually align with all the limiters 5. Then the guide sleeve 6 descends, and the inclined surface on the fastening groove 21 on the guide sleeve 6 will push the limiter 5 to gradually enter the annular groove 19 on the piston 3.

[0084] If the longitudinal section of the annular groove 19 and the fastening groove 21 does not have a sloped area, the limiter 5 will have difficulty moving along the axial direction of the receiving hole 12.

[0085] In some specific implementations, such as Figure 11 As shown, the receiving hole 12 includes a sliding section 16 disposed on the outer periphery of the rod body 10, and the inner wall of the alignment groove 11 is provided with a constricted section 17. The constricted section 17 communicates with the sliding section 16, and the width of the constricted section 17 is smaller than the width of the sliding section 16, so as to prevent the limiter 5 from disengaging from the sliding section 16.

[0086] Specifically, since one end of the sliding section 16 is always blocked by the side wall of the piston 3, if the limiter 5 wants to disengage from the sliding section 16, it will only slide into the alignment groove 11. At this time, since the width of the constriction section 17 is smaller than the width of the sliding section 16, when the limiter 5 slides to the constriction section 17, it can achieve the purpose of preventing the limiter 5 from disengaging from the sliding section 16.

[0087] In some specific implementations, such as Figure 2 As shown, the limiter 5 has a spherical structure.

[0088] In some embodiments, the diameter of the restrictor 5 is smaller than the diameter of the necked-down section 17, and when the side wall of the restrictor 5 is blocked by the necked-down section 17, the side wall of the restrictor 5 abuts against the inner side wall of the fastening groove 21 on the guide sleeve 6.

[0089] The spherical structure is a preferred choice of the restrictor 5, and in actual use, at least the following requirements are met:

[0090] Requirement 1, with reference to Figure 2 At this time, the ring groove 19 on the piston 3 and the fastening groove 21 on the guide sleeve 6 will be aligned with the accommodation hole 12, and based on the accommodation hole 12, the restrictor 5 will be divided into three parts, the first part is in the accommodation hole 12, and the second and third parts are in the ring groove 19 on the piston 3 and the fastening groove 21 on the guide sleeve 6, respectively.

[0091] Requirement 2, when the guide sleeve 6 is in a fixed state, the second part of the restrictor 5 is in the accommodation hole 12, and the surface of the third part of the restrictor 5 is tangent to the inclined surface of the fastening groove 21 on the guide sleeve 6, so as to limit the guide sleeve 6.

[0092] Specifically, the working process of the spherical structure restrictor 5 is (with reference to Figure 2 、 Figure 12 and Figure 13 ):

[0093] When the guide sleeve 6 is in a fixed state, at this time, the piston 3 has not been lowered, and the external force does not compress the elastic member (i.e., spring) 4, so that the length of the elastic member 4 does not change, and the side wall of the piston 3 abuts against the second part of the restrictor 5 and pushes the edge of the second part of the restrictor 5 to be flush with the edge of the accommodation hole 12.

[0094] At the same time, the side wall of the first part of the restrictor 5 abuts against the inner side wall of the necked-down section 17, and the surface of the third part of the restrictor 5 is tangent to the inclined surface of the fastening groove 21 on the guide sleeve 6, so as to limit the guide sleeve 6.

[0095] In some embodiments, as Figure 9 shown, the rod head 9 is provided with a gas guide hole 18 for guiding the high-pressure gas into the closed chamber 7. It should be noted that when the guide sleeve 6 is not replaced, the piston 3 is not pushed by the gas, and once the guide sleeve 6 needs to be replaced, the gas will always press the piston 3, and only after the replacement of the guide sleeve 6 is completed, the gas will be discharged to release the pressure on the piston 3.

[0096] When the gas does not enter the closed chamber 7, at this time the elastic force of the elastic member 4 is greater than the gravity of the piston 3, the piston 3 will not slide downward, once the high-pressure gas is introduced into the closed chamber 7, the pressure in the closed chamber 7 will gradually increase, when the pressure is greater than the elastic force of the elastic member 4, by virtue of the design, the piston 3 can realize the operation of extruding the elastic member 4.

[0097] After the operation of extruding the elastic member 4 is completed, as long as the gas injected into the closed chamber 7 is discharged, the elastic member 4 can be restored to the state before being extruded, that is, the relaxed state, which indicates that the elastic member 4 can be converted between the relaxed state and the compressed state.

[0098] In some embodiments, as shown in Figure 2 , Figure 3 and Figure 6 , the bottom end surface of the piston 3 and the bottom of the closed chamber 7 jointly form a plurality of anti-deviation grooves 22 for limiting the axial deviation of the elastic member 4;

[0099] Each anti-deviation groove 22 is arranged one-to-one corresponding to each elastic member 4.

[0100] The elastic member 4 can be a spring, and when the elastic member 4 is arranged, one end thereof can be directly connected with the groove bottom of the closed chamber 7, and the other end thereof is directly connected with the bottom surface of the piston 3; although this way can quickly realize the operation of installing the elastic member 4, the elastic member 4 needs to be repeatedly compressed, and in the compression process, the elastic member 4 is easy to tilt in the closed chamber 7, and in order to solve this problem, the anti-deviation groove 22 (which can be referred to Figure 2 , Figure 3 and Figure 6 ) can be arranged on the side surface of the piston 3 close to the elastic member 4, so that the elastic member 4 will not tilt when compressed in the closed chamber 7.

[0101] Working principle:

[0102] Since the elastic member 4 is in a relaxed state under normal circumstances, at this time the side wall of the piston 3 will simultaneously apply a pushing force to all the limiters 5, in order to facilitate the installation of the guide sleeve 6, the gas is directly injected into the closed chamber 7 to guide the piston 3 to slide downward along the axis direction of the rod body 10, so that the elastic member 4 enters the compressed state from the relaxed state, at this time, the ring groove 19 on the piston 3 is aligned with all the limiters 5, then the guide sleeve 6 is inserted into the alignment groove 11, the alignment groove 11 guides the guide sleeve 6 to coincide with the axis of the guide positioning member 2 through the side wall inside itself, so as to realize positioning (in this process, the guide sleeve 6 pushes the limiters 5 into the ring groove 19 on the piston 3), then the gas in the closed chamber 7 is discharged and the elastic member 4 is guided to enter the relaxed state, so that the side wall of the piston 3 pushes all the limiters 5 to be simultaneously clamped into the fastening groove 21 on the guide sleeve 6, so as to realize the quick fixing of the guide sleeve 6.

[0103] Specifically, the restrictor 5 is in the fixed state of the guide sleeve 6, at this time, the piston 3 is not sliding down, and the external force does not compress the elastic member 4 (i.e. spring), so that the elastic member 4 is in the compressed state, and thus the length of the elastic member 4 does not change, and the side wall of the piston 3 abuts against the second part of the restrictor 5.

[0104] The side wall of the first part of the restrictor 5 abuts against the inner wall of the necked section 17, and the surface of the third part of the restrictor 5 is tangent to the inclined surface of the fastening groove 21 on the guide sleeve 6, so as to limit the guide sleeve 6.

[0105] When it is needed to quickly remove the guide sleeve 6 for replacement, the high-pressure gas is directly introduced into the closed chamber 7 through the air guide hole 18, so as to drive the piston 3 to slide down along the rod body 10 in the closed chamber 7, and the elastic member 4 is changed from the relaxed state to the compressed state, and in the process of the state change of the elastic member 4, the ring groove 19 on the piston 3 is gradually aligned with the accommodating hole 12.

[0106] When the piston 3 slides down along the rod body 10, the piston 3 pushes the plurality of bosses 13 to gradually pass through the groove bottom of the closed chamber 7, and when the boss 13 passes through the groove bottom of the closed chamber 7, the end surface of the stabilizing ring 15 is pushed by the boss 13, so as to be subjected to a downward force, that is, the fastening groove 21 on the guide sleeve 6 is gradually out of alignment with the accommodating hole 12.

[0107] When the fastening groove 21 on the guide sleeve 6 is gradually out of alignment with the accommodating hole 12, the inclined surface of the fastening groove 21 on the guide sleeve 6 pushes the surface of the third part of the restrictor 5 into the accommodating hole 12.

[0108] Then, the surface of the second part of the restrictor 5 abuts against the inner wall of the ring groove 19 on the piston 3.

[0109] Subsequently, the guide sleeve 6 can be removed (before being removed, the clamping device is arranged at the predetermined position, so that when the guide sleeve 6 is pushed out, the guide sleeve 6 is clamped by the clamping device, and then is transferred away).

[0110] The above embodiment is only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable the person skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. An electrical discharge drilling machine guide quick change device, characterized in that: The guide sleeve seat has a closed chamber with an open upper end, and a plug-in hole coaxially formed in the bottom of the guide sleeve seat along the up-down direction, and the lower end of the closed chamber is communicated with the upper end of the plug-in hole; The guide positioning member is inserted into the closed chamber from top to bottom, and the upper end of the guide positioning member is sealingly assembled with the open end of the closed chamber, and the lower end of the guide positioning member is inserted into the plug-in hole and coaxially positioned; The piston, the elastic member and the limiter are further included. The piston is annularly sleeved on the outer circumferential side of the guide positioning member and is slidingly arranged relative to the axial direction of the guide positioning member. The limiter is movably arranged between the guide positioning member and the piston. Three positioning portions for positioning the limiter are further included. The first positioning portion is arranged on the circumferential side of the guide positioning member, the second positioning portion is arranged on the inner side wall of the piston, and the third positioning portion is arranged on the outer circumferential surface of the guide sleeve. The piston has two states of lifting and lowering. In the lifting state, the first positioning portion and the third positioning portion are horizontally aligned, at this time, the limiter is jointly positioned by the first positioning portion and the third positioning portion, and the guide sleeve is stationary relative to the guide positioning member.

2. The quick-change device for the guide of the electric spark hole machine according to claim 1, characterized in that: In the lowering state, the second positioning portion is lowered to be horizontally aligned with the first positioning portion and the third positioning portion, at this time, the limiter is horizontally released from the positioning, the guide sleeve can move axially, and the guide sleeve pushes the limiter radially into the second positioning portion and the first positioning portion through the axial movement to limit the limiter. The bottom of the piston is provided with a boss, and the bottom of the guide sleeve seat is provided with a through slot corresponding to the boss. The guide positioning member includes a rod head and a rod body coaxially arranged, and the rod head is sealingly assembled with the open end of the closed chamber.

3. The quick-change device of the guide of the electric spark hole machine according to claim 2, characterized in that: The piston is annularly sleeved on the outer circumferential side of the rod body.

4. The quick-change device for the guide of the electric spark hole machine according to claim 3, characterized in that: The inner part of the rod body is coaxially provided with an alignment groove, and the slot opening of the alignment groove is located at the bottom of the rod body.

5. The quick-change device for the guide of the WEDM according to claim 4, characterized in that: The guide sleeve includes a plug-in head matched with the alignment groove, and the outer circumferential wall of the plug-in head is provided with a fastening groove for accommodating the limiter. The limiter is a spherical structure. The first positioning portion is an accommodation hole arranged on the circumferential side of the rod body.

6. The quick-change device for the guide of the electric spark hole machine according to claim 5, characterized in that: The second positioning portion is an annular groove arranged along the inner side wall of the piston and surrounding the rod body.

7. The quick-change device for the guide of the electric spark hole machine according to claim 2, characterized in that: The third positioning portion is a fastening groove arranged on the outer circumferential wall of the plug-in head.

8. The electrode spark trepanning machine guide changer device according to claim 1, characterized in that: The accommodation hole includes a sliding section arranged on the outer circumferential side of the rod body, and the inner wall of the alignment groove is provided with a necking section, which is communicated with the sliding section and has a width smaller than that of the sliding section, so as to block the limiter from escaping from the sliding section. The rod head is provided with a gas guide hole for guiding high-pressure gas into the closed chamber. The bottom end surface of the piston and the bottom of the closed chamber jointly form a plurality of anti-deviation grooves for limiting the axial deviation of the elastic member. Each anti-deviation groove is arranged one-to-one corresponding to each elastic member.

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