Three-purpose insertion piece working and mounting assembly

Abstract

The utility model provides a three-purpose insert work installation assembly, which relates to the technical field of circular knitting machines, and comprises an insert installation rack, a contraction and expansion ring assembly, an elastic reset piece and a stroke slide block, a plurality of three-purpose inserts are arranged on the insert installation rack along the radial direction in a sliding manner, and all the three-purpose inserts are uniformly distributed along the circumferential direction; the shrinking and expanding ring assembly and the elastic reset piece are both connected with the three-purpose inserting piece, the shrinking and expanding ring assembly can push the three-purpose inserting piece to move in the forward direction in the radial direction and enable the elastic reset piece to deform through reducing, and the deformed elastic reset piece can push the three-purpose inserting piece to move in the reverse direction in the radial direction; the stroke sliding block is connected with the shrinking and expanding ring assembly, and the diameter of the shrinking and expanding ring assembly can be changed by moving the stroke sliding block. According to the utility model, the contraction and expansion ring assembly, the elastic reset piece and the stroke slide block are matched with each other, so that full advancing, full retreating, first-stage advancing, second-stage advancing, first-stage retreating and second-stage retreating of the three-purpose insertion sheet can be realized, the action process is stable, the advancing and retreating effects are obvious, the structure is simple, and the installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of circular knitting machines, in particular to a three-purpose insert working installation assembly. Background Art

[0002] Circular knitting machines, scientifically known as circular weft knitting machines, are widely used due to their multiple loop-forming systems, high speed, high output, fast pattern changes, good fabric quality, fewer processes, and strong product adaptability. Circular knitting machines usually include a sewing device and a coil device. The coil device has an insert, and the coil is formed by the wiring action of the insert. The structure of the existing circular knitting machine for the insert action is not only more complicated, but also has a poor wiring effect.

[0003] Therefore, a plug-in working installation assembly with a simple structure and capable of stably performing forward and backward movements of the plug-in is in urgent need of invention. Utility Model Content

[0004] The purpose of the present invention is to provide a three-purpose plug-in working installation assembly to solve the above-mentioned technical problems existing in the prior art; the preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects; see the following for details.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The utility model provides a three-purpose plug working installation assembly, comprising a plug mounting frame, a shrinking and expanding ring assembly, an elastic reset member and a travel slider, wherein: a three-purpose plug is radially slidably arranged on the plug mounting frame, the number of the three-purpose plugs is set to be multiple, and all the three-purpose plugs are evenly distributed along the circumferential direction; the shrinking and expanding ring assembly and the elastic reset member are both connected to the three-purpose plug, and the shrinking and expanding ring assembly can change its diameter to push the three-purpose plug to move in the radial positive direction and cause the elastic reset member to deform, and the deformed elastic reset member can push the three-purpose plug to move in the radial reverse direction; the travel slider is connected to the shrinking and expanding ring assembly, and moving the travel slider can cause the shrinking and expanding ring assembly to change its diameter.

[0007] Preferably, the travel slider, the shrinking and expanding ring assembly and the insert mounting frame are all arranged in a ring shape; the travel slider, the shrinking and expanding ring assembly and the insert mounting frame are arranged in sequence along the axial direction.

[0008] Preferably, the insert mounting frame is evenly provided with a plurality of sliding grooves along the circumferential direction, and the sliding grooves are arranged along the radial direction of the insert mounting frame, and the corresponding three-purpose inserts are slidably arranged in the sliding grooves.

[0009] Preferably, the shrinking and expanding ring assembly includes a shrinking and expanding guide ring and a shrinking and expanding diameter-changing assembly, wherein: a first guide groove is provided on the shrinking and expanding guide ring; a second guide groove is provided on the stroke slider at a position corresponding to the first guide groove; the shrinking and expanding diameter-changing assembly is provided with a guide screw, and the guide screw passes through the corresponding first guide groove and the second guide groove; when the stroke slider is rotated, the second guide groove can push the guide screw to slide along the first guide groove, so that the shrinking and expanding diameter-changing assembly can change its diameter.

[0010] Preferably, the shrinking and expanding diameter-changing assembly includes a plurality of unit diameter-changing assemblies evenly distributed along the circumferential direction, and each of the unit diameter-changing assemblies is provided with the guide screw; when the guide screw slides relative to the corresponding first guide groove and the second guide groove, it can drive the corresponding unit diameter-changing assembly to move radially.

[0011] Preferably, the first guide groove is set as a long groove, and the first guide groove is set along the chord direction of the shrinking and expanding guide ring; the second guide groove includes a first positioning groove, a first arc-shaped connecting groove, a second positioning groove, a second arc-shaped connecting groove and a third positioning groove connected in sequence.

[0012] Preferably, the unit diameter reducing assembly includes an arc-shaped expansion and contraction component, and at least one guide screw is provided on the arc-shaped expansion and contraction component.

[0013] Preferably, a plurality of guide screws are provided on the arc-shaped contraction and expansion member; the unit diameter-reducing assembly includes an arc-shaped connecting piece, and all the guide screws on the same arc-shaped contraction and expansion member are connected via the arc-shaped connecting piece.

[0014] Preferably, the travel slider is provided with a swinging portion, and pushing and pulling the swinging portion can drive the travel slider to rotate.

[0015] Preferably, the elastic reset element is configured as an annular radial spring.

[0016] The three-purpose insert working installation assembly provided by the utility model has at least the following beneficial effects:

[0017] The three-purpose plug working installation assembly includes a plug mounting frame, a shrinking and expanding ring assembly, an elastic reset member and a travel slider. The plug mounting frame is used for installing and guiding the three-purpose plug. The shrinking and expanding ring assembly and the elastic reset member cooperate with each other to enable the three-purpose plug to move forward and backward. The travel slider is a driving transmission component used for power input for the forward and backward movement.

[0018] The three-purpose plug is radially slidably arranged on the plug mounting frame. The number of the three-purpose plug is set to multiple, and all the three-purpose plugs are evenly distributed along the circumference. The plug mounting frame can firmly install the three-purpose plug and provide an accurate path for the three-purpose plug to advance and retreat, thereby ensuring its routing effect.

[0019] The shrinking and expanding ring assembly and the elastic return member are both connected to the three-purpose insert, and the travel slider is connected to the shrinking and expanding ring assembly. During operation, the travel slider moves, driving the shrinking and expanding ring assembly to change diameter, thereby pushing the three-purpose insert to move radially. During this process, the elastic return member is deformed by the force. After the routing is completed, the deformed elastic return member pushes the three-purpose insert to move in the opposite radial direction, thereby completing the forward and backward movement of the three-purpose insert. The entire movement process is stable and the forward and backward effect is significant.

[0020] The utility model can stably install the three-purpose plug-in plate through the plug-in plate mounting frame and provide the three-purpose plug-in plate with an accurate advance and retreat path. The three-purpose plug-in plate can stably perform the advance and retreat movements through the cooperation of the shrinkage and expansion ring assembly, the elastic reset part and the stroke slider, and realize the full advance, full retreat, first-level advance, second-level advance, first-level retreat and second-level retreat movements of the three-purpose plug-in plate. The movement process is stable and the advance and retreat effect is significant.

[0021] At the same time, compared with the existing technology, the three components of the existing upper transfer insert pressure plate, lower transfer insert top plate and transfer crochet insert assembly are improved into one assembly, which has a simple structure and can effectively avoid technical problems such as installation troubles caused by the need for coaxial installation of the existing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 It is a structural exploded view of the utility model;

[0025] Figure 3 This is a top view of the utility model (excluding the arc-shaped connecting piece);

[0026] Figure 4 This is a structural diagram of the insert mounting frame of the utility model;

[0027] Figure 5 This utility model Figure 4 A magnified view of part A;

[0028] Figure 6 This is a structural diagram of the shrinking and expanding guide ring of the utility model;

[0029] Figure 7A schematic structural diagram of the travel slider of the utility model;

[0030] Figure 8 This is a schematic diagram of the guide screw pin of the utility model in the first positioning groove;

[0031] Figure 9 This is a schematic diagram of the guide screw pin of the utility model in the second positioning groove;

[0032] Figure 10 This is a schematic diagram of the guide screw pin of the utility model in the state of being in the third positioning groove;

[0033] Figure 11 This is a schematic structural diagram of the arc-shaped expansion and contraction member of the utility model;

[0034] Figure 12 This is a schematic structural diagram of the arc-shaped connecting piece of the utility model;

[0035] Figure 13 This is a structural diagram of the three-purpose insert of the utility model;

[0036] Figure 14 This is a schematic diagram of the wiring process of the three-purpose plug of the utility model;

[0037] Figure 15 This is a structural diagram of the utility model in an installed state;

[0038] Figure 16 It is a structural diagram of the prior art.

[0039] Reference numerals

[0040] 1. Insert mounting frame; 11. Sliding groove; 2. Shrinkage and expansion ring assembly; 21. Shrinkage and expansion guide ring; 211. First guide groove; 22. Guide screw; 23. Arc-shaped shrinkage and expansion member; 231. Threaded hole; 232. Give way groove; 24. Arc-shaped connecting piece; 241. Connecting hole; 3. Elastic reset member; 4. Travel slider; 41. Second guide groove; 411. First positioning groove; 412. First arc-shaped connecting groove; 413. Second positioning groove; 414. Second arc-shaped connecting groove; 415. Third positioning groove; 42. Swinging part; 5. Three-purpose insert; 51. Mounting groove; 52. Abutment part; 6. Upper transfer insert pressure plate; 7. Transfer hook insert assembly; 8. Lower transfer insert top plate. DETAILED DESCRIPTION

[0041] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0042] Example 1:

[0043] The utility model provides a three-purpose plug-in installation assembly, Figures 1 to 15 As shown, the three-purpose plug working installation assembly includes a plug installation frame 1, a shrinking and expanding ring component 2, an elastic reset member 3 and a travel slider 4.

[0044] A three-purpose insert 5 is radially slidably provided on the insert mounting frame 1. The number of the three-purpose inserts 5 is set to multiple, and all three-purpose inserts 5 are evenly distributed along the circumferential direction. The shrinking and expanding ring assembly 2 and the elastic return member 3 are both connected to the three-purpose insert 5, and the two are respectively used for the advancement and retreat of the three-purpose insert 5. The travel slider 4 is connected to the shrinking and expanding ring assembly 2, and is used to transmit the power output by the power mechanism to the shrinking and expanding ring assembly 2, so that it cooperates with the elastic return member 3 to complete the advancement and retreat of the three-purpose insert 5.

[0045] During operation, the power mechanism drives the travel slider 4 to move, and the travel slider 4 transmits power to the shrinking and expanding ring assembly 2, causing it to change its diameter, thereby driving the three-purpose plug 5 to move in the radial positive direction along the plug mounting frame 1. During this process, the elastic return member 3 is deformed to generate elastic force. When the routing is completed, the elastic force acts on the three-purpose plug 5, causing it to move in the radial reverse direction along the plug mounting frame 1, completing the forward and backward movement of the three-purpose plug 5.

[0046] The utility model can firmly install the three-purpose plug 5 through the plug mounting frame 1 and provide an accurate path for the radial movement of the three-purpose plug 5. The travel slider 4, the shrinkage and expansion ring assembly 2 and the elastic reset member 3 cooperate with each other, so that the three-purpose plug 5 can stably perform forward and backward movements.

[0047] The utility model can realize the full advance, full retreat, one-stage advance, two-stage advance, one-stage retreat and two-stage retreat actions of the three-purpose insert 5 , the whole action process is stable and the advance and retreat effect is significant.

[0048] At the same time, in the existing large circular knitting machine structure, such as Figure 16 As shown, the knitted fabric coil transfer device generally includes an upper transfer insert plate 6, a lower transfer insert top plate 8 and a transfer hook insert assembly 7. The three need to be coaxially arranged during installation, which is more troublesome to install.

[0049] The utility model improves the existing upper transfer insert pressure plate 6, lower transfer insert top plate 8 and transfer hook insert assembly 7 into one assembly of the three-purpose insert working installation assembly, which can effectively solve the technical problems of complex structure and troublesome installation.

[0050] Example 2:

[0051] Example 2 is based on Example 1:

[0052] like Figures 1 to 13 As shown, the travel slider 4, the shrinking and expanding ring assembly 2 and the insert mounting frame 1 are all arranged in a ring shape, and the travel slider 4, the shrinking and expanding ring assembly 2 and the insert mounting frame 1 are arranged in sequence along the axial direction.

[0053] In this way, the entire structure of the three-purpose plug working installation assembly is made more compact, and the entire assembly can be moved up and down along the axial direction, which facilitates the subsequent up and down lifting action of the three-purpose plug 5.

[0054] As an optional embodiment, the insert mounting frame 1 is evenly provided with multiple sliding grooves 11 along the circumference. The sliding grooves 11 are grooves arranged along the radial direction of the insert mounting frame 1. The corresponding three-purpose inserts 5 are inserted into the sliding grooves 11 and slide in conjunction with the sliding grooves 11.

[0055] The sliding groove 11 can effectively limit the sliding track of the three-purpose insert 5, thereby ensuring the forward and backward movement effect.

[0056] As an optional embodiment, the shrinking and expanding ring assembly 2 includes a shrinking and expanding guide ring 21 and a shrinking and expanding diameter-changing assembly.

[0057] A first guide groove 211 is provided on the expansion and contraction guide ring 21; a second guide groove 41 is provided on the stroke slider 4 at a position corresponding to the first guide groove 211; the expansion and contraction diameter reducing assembly is provided with a guide screw 22, which passes through the first guide groove 211 and the second guide groove 41 in sequence.

[0058] When the travel slider 4 is rotated, the second guide groove 41 rotates synchronously, thereby pushing the guide screw 22 to slide along the first guide groove 211. The first guide groove 211 and the second guide groove 41 cooperate with each other to enable the guide screw 22 to move stably, thereby changing the diameter of the shrinking and expanding diameter-changing assembly to realize the forward and backward movement of the three-purpose insert 5.

[0059] The number of the first guide grooves 211 , the second guide grooves 41 and the guide screw pins 22 is the same, and they are all provided in plural. All the first guide grooves 211 , the second guide grooves 41 and the guide screw pins 22 correspond to each other one by one.

[0060] As an optional embodiment, the shrinking and expanding diameter-changing assembly includes a plurality of unit diameter-changing assemblies evenly distributed along the circumferential direction, and each of the unit diameter-changing assemblies is provided with a guide screw 22 .

[0061] During the advancement and retreat of the three-purpose insert 5, the guide screw 22 slides along the corresponding first guide groove 211 and the second guide groove 41, thereby driving the corresponding unit diameter reducing assembly to move radially. In this way, the diameter of the circumferentially distributed unit diameter reducing assembly changes to achieve diameter change.

[0062] As an optional embodiment, the first guide groove 211 is configured as a long strip groove, and the first guide groove 211 is configured along the chord direction of the shrinking and expanding guide ring 21 , where the chord direction is the straight line direction where the chord of the shrinking and expanding guide ring 21 is located.

[0063] The second guide groove 41 includes a first positioning groove 411 , a first arc-shaped connecting groove 412 , a second positioning groove 413 , a second arc-shaped connecting groove 414 and a third positioning groove 415 , which are connected in sequence.

[0064] The first positioning groove 411 , the first arc-shaped connecting groove 412 , the second positioning groove 413 , the second arc-shaped connecting groove 414 and the third positioning groove 415 are all matched with the size of the guide screw pin 22 .

[0065] The first guide groove 211 and the second guide groove 41 cooperate with each other, and can effectively convert the rotation of the travel slider 4 into the movement of the guide screw 22, and the transmission process is stable and reliable.

[0066] During operation, when the guide screw 22 is in the first positioning groove 411, the three-purpose insert 5 is in a retreat state; when the guide screw 22 is in the second positioning groove 413, the three-purpose insert 5 is in a semi-advance state; when the guide screw 22 is in the third positioning groove 415, the three-purpose insert 5 is in a full advance state; with the setting of three positioning grooves, the guide screw 22 has three positionings, which can realize full advance and retreat, one-level advance and retreat, and two-level advance and retreat, and the action effect is significant.

[0067] As an optional embodiment, the unit diameter reducing assembly includes an arc-shaped contraction and expansion member 23 , and at least one guide screw pin 22 is provided on the arc-shaped contraction and expansion member 23 .

[0068] Thus, during operation, the corresponding guide screw pin 22 drives the corresponding arc-shaped expansion and contraction member 23 to move radially.

[0069] Specifically, a threaded hole 231 is provided on the arc-shaped expansion and contraction member 23 , and the guide screw pin 22 is threadedly connected in the threaded hole 231 .

[0070] Both ends of the arc-shaped expansion and contraction piece 23 are provided with a clearance groove 232. When the expansion and contraction ring assembly 2 is at the minimum diameter, the end of any arc-shaped expansion and contraction piece 23 can be inserted into the clearance groove 232 of its adjacent arc-shaped expansion and contraction piece 23.

[0071] The provision of the relief groove 232 , on the one hand, makes the structure more compact, and on the other hand, enables the shrinking and expanding ring assembly 2 to have a smaller diameter, thereby expanding the stroke of the three-purpose insert 5 .

[0072] As an optional embodiment, a plurality of guide screw pins 22 are provided on the arc-shaped contraction and expansion member 23 , and the chords of all the guide screw pins 22 on the same arc-shaped contraction and expansion member 23 are parallel to each other.

[0073] Preferably, two guide screw pins 22 are provided on the same arc-shaped expansion and contraction member 23, which can improve the stability of the transmission process.

[0074] The unit diameter reducing assembly includes an arc-shaped connecting piece 24 , and all the guide screw pins 22 on the same arc-shaped expansion and contraction component 23 are connected via the arc-shaped connecting piece 24 .

[0075] The provision of the arc-shaped connecting piece 24 can effectively limit the distance between adjacent guide screw pins 22 , thereby further improving the stability of the guide screw pins 22 during the sliding process.

[0076] Specifically, a connection hole 241 is provided on the arc-shaped connection piece 24 at a position corresponding to the guide screw pin 22 , and the guide screw pin 22 passes through the corresponding connection hole 241 .

[0077] The arc-shaped connecting piece 24, the travel slider 4, the shrinking and expanding guide ring 21 and the arc-shaped shrinking and expanding member 23 are arranged in sequence along the axial direction.

[0078] As an optional embodiment, the travel slider 4 is provided with a swing portion 42 , and the swing portion 42 is a swing gear block integrally provided on the travel slider 4 .

[0079] The power mechanism is configured as a rotating mechanism, an output end of which has a gear meshing with the swinging gear block. The rotating mechanism adopts an electric drive mechanism, so that the travel slider 4 can be driven to swing by rotating the rotating mechanism.

[0080] As an optional embodiment, the elastic return member 3 is configured as an annular radial spring.

[0081] The three-purpose plug 5 includes a plug body and an abutment portion 52 vertically arranged at the end of the plug body. The three-purpose plug 5 is L-shaped, and the inner side of the abutment portion 52 abuts against the outer wall of the arc-shaped expansion and contraction part 23. The outer side of the abutment portion 52 is provided with a mounting groove 51, and the annular radial spring is installed in the mounting groove 51.

[0082] Thus, when the arc-shaped expansion and contraction member 23 moves radially outward, the three-purpose insert 5 moves backward, causing the annular radial spring to deform. The deformed annular radial spring generates elastic force acting on the three-purpose insert 5, causing the three-purpose insert 5 to move forward.

[0083] like Figure 14As shown, the wiring process of the three-purpose plug 5 of the present invention generally includes forward and backward movements and lifting and lowering movements, wherein, Figure 14 Step (I) and step (II) are forward and backward movements, the stability of which is related to the forming effect of the coil. The three-purpose plug-in working installation assembly of the utility model can effectively perform the forward and backward movements of the three-purpose plug-in 5, realizing its full forward, full backward, one-level forward, two-level forward, one-level backward and two-level backward, with significant forward and backward effects. At the same time, the three-purpose plug-in working installation assembly of the utility model can also move up and down along the axial direction, thereby realizing the lifting and lowering movement during the wiring process.

[0084] like Figure 15 and Figure 16 As shown, compared with the prior art, the present invention improves the existing upper transfer insert pressure plate 6, lower transfer insert top plate 8 and transfer hook insert assembly 7 into the three-purpose insert working installation assembly, and improves the three assemblies into one assembly, which can effectively solve the problems of complex structure and inconvenient installation in the prior art.

[0085] In the description of this application, it should be understood that the terms "upper", "lower", "inside", "outside", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0086] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" or "several" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0087] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0088] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A three-purpose insert working installation assembly, characterized in that: It includes a plug-in mounting frame, a shrinking and expanding ring assembly, an elastic reset member and a travel slider, wherein: A three-purpose insert is provided on the insert mounting frame in a radially sliding manner. The number of the three-purpose inserts is set to be multiple, and all the three-purpose inserts are evenly distributed along the circumference. The shrinking and expanding ring assembly and the elastic reset member are both connected to the three-purpose insert. The shrinking and expanding ring assembly can change its diameter to push the three-purpose insert to move in the radial positive direction and deform the elastic reset member. The deformed elastic reset member can push the three-purpose insert to move in the radial reverse direction. The travel slider is connected to the shrinking and expanding ring assembly. Moving the travel slider can change the diameter of the shrinking and expanding ring assembly.

2. The three-purpose insert working installation assembly according to claim 1, characterized in that: The travel slider, the shrinking and expanding ring assembly and the insert mounting bracket are all arranged in a ring shape; The travel slider, the shrinking and expanding ring assembly and the insert mounting bracket are sequentially arranged along the axial direction.

3. The three-purpose insert working installation assembly according to claim 1, characterized in that: The insert mounting frame is evenly provided with a plurality of sliding grooves along the circumferential direction. The sliding grooves are arranged along the radial direction of the insert mounting frame, and the corresponding three-purpose inserts are slidably arranged in the sliding grooves.

4. The three-purpose insert working installation assembly according to claim 1, characterized in that: The shrinking and expanding ring assembly includes a shrinking and expanding guide ring and a shrinking and expanding diameter reducing assembly, wherein: The shrinking and expanding guide ring is provided with a first guide groove; A second guide groove is provided on the travel slider at a position corresponding to the first guide groove; The shrinking and expanding diameter-changing assembly is provided with a guide screw, and the guide screw passes through the corresponding first guide groove and the second guide groove; By rotating the travel slider, the second guide groove can push the guide screw to slide along the first guide groove, so that the diameter of the shrinking and expanding diameter-changing component can be changed.

5. The three-purpose insert working installation assembly according to claim 4, characterized in that: The shrinking and expanding diameter-changing assembly includes a plurality of unit diameter-changing assemblies evenly distributed along the circumferential direction, and each of the unit diameter-changing assemblies is provided with the guide screw; When the guide screw slides relative to the corresponding first guide groove and the corresponding second guide groove, it can drive the corresponding unit diameter-changing component to move radially.

6. The three-purpose insert working installation assembly according to claim 4, characterized in that: The first guide groove is configured as a long groove, and the first guide groove is arranged along the chord direction of the shrinking and expanding guide ring; The second guide groove includes a first positioning groove, a first arc-shaped connecting groove, a second positioning groove, a second arc-shaped connecting groove and a third positioning groove which are connected in sequence.

7. The three-purpose insert working installation assembly according to claim 5, characterized in that: The unit diameter-changing assembly includes an arc-shaped contraction and expansion piece, and at least one guide screw is provided on the arc-shaped contraction and expansion piece.

8. The three-purpose insert working installation assembly according to claim 7, characterized in that: The arc-shaped expansion and contraction member is provided with a plurality of guide screw pins; The unit diameter reducing assembly includes an arc-shaped connecting piece, and all the guide screws on the same arc-shaped expansion and contraction component are connected through the arc-shaped connecting piece.

9. The three-purpose insert working installation assembly according to claim 4, characterized in that: The travel slider is provided with a swinging portion, and pushing and pulling the swinging portion can drive the travel slider to rotate.

10. The three-purpose insert working installation assembly according to claim 1, characterized in that: The elastic reset element is configured as an annular radial spring.

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