Air expansion type magnetic shoe assembling device and method

Abstract

The invention discloses an air expansion type magnetic shoe assembling device and method. The tool comprises a base, an assembling mandrel and a plurality of sliding blocks. The base is fixedly arranged; the assembly mandrel is vertically arranged on the base and is provided with a ventilation cavity and a ventilation hole, the ventilation cavity is connected to external ventilation equipment through the ventilation hole, a plurality of mounting grooves are formed in the side wall of the assembly mandrel in the circumferential direction at intervals, and the mounting grooves communicate with the ventilation cavity; the multiple sliding blocks are inserted into the multiple mounting grooves in the horizontal direction in a limited mode, and gas can enter the multiple mounting grooves through the ventilation holes and the ventilation cavities in sequence so that the sliding blocks can slide in the mounting grooves. The device is simple in structure and small in occupied area, the manufacturing cost is greatly reduced, and the device can be used for sample production and small-batch production, so that the economic applicability is improved; and meanwhile, the magnetic shoes are assembled in an air expansion mode, manual assembly is avoided, and therefore it is ensured that the air expansion type magnetic shoe assembling device further has the good assembling efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of motor production, and in particular relates to an air expansion type magnetic shoe assembly device and method. Background Art

[0002] The stator in the motor is basically composed of magnetic tiles, gaskets, bearings, retaining rings and casings. Because there is no hole on the top of the casing, it is a semi-closed structure, so the magnetic tiles are usually inserted from the bottom opening of the casing against the inner wall of the casing during assembly. For example, in the prior art, the Chinese invention patent with application number CN201510123730.5 provides an automatic assembly device for the stator of a DC motor, which is provided with a magnetic tile push-pull cylinder and a casing push-pull cylinder on the positioning frame, and an outer arc glue gun head and an inner arc glue gun head are provided on one side, which are used to apply glue to the inner wall of the casing and the outer wall of the magnetic tile, respectively, and then push the magnetic tile into the casing, and use the tensioning arm and the tensioning cylinder to push the magnetic tile open and close to the casing, thereby realizing the bonding connection between the magnetic tile and the casing. However, the above-mentioned equipment is relatively large as a whole, occupying a large amount of floor space; and the structure is relatively complex, the cost is too high, and the assembly speed is still relatively slow, which makes it very uneconomical and cost-effective during the sample debugging stage and the small batch production stage.

[0003] Therefore, there is an urgent need for a magnetic tile assembly device and method to solve the technical problems existing in the prior art. Summary of the invention

[0004] The object of the present invention is to provide a magnetic tile assembly device and method, aiming to simplify the structure, reduce the floor space, reduce the production cost, improve the economic applicability, and ensure better magnetic tile assembly efficiency.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] An air-expansion magnetic tile assembly device comprises: a base, which is fixedly arranged; an assembly core shaft, which is vertically arranged on the base, wherein the assembly core shaft has a ventilation cavity and a ventilation hole, wherein the ventilation cavity is connected to an external ventilation device via the ventilation hole, and wherein a plurality of mounting grooves are circumferentially spaced apart on the side wall of the assembly core shaft, wherein the plurality of mounting grooves are connected to the ventilation cavity; and a plurality of sliders, which are inserted into the plurality of mounting grooves in a horizontally limited manner, wherein gas can enter the plurality of mounting grooves through the ventilation holes and the ventilation cavity in turn, so that the sliders can slide in the mounting grooves.

[0007] Optionally, a waist-shaped hole is opened on the sliding block along the sliding direction, and a positioning circular hole is opened on the side wall of the mounting groove, and the positioning circular hole is arranged corresponding to the waist-shaped hole; the air-expansion magnetic tile assembly device also includes a connecting piece, and the connecting piece is inserted into the positioning circular hole and the waist-shaped hole in sequence.

[0008] Optionally, a magnetic attraction member is provided on the side wall of the assembly mandrel.

[0009] Optionally, a plurality of support parts extending vertically upward are circumferentially arranged on the base, and the assembly core shaft can be inserted into the plurality of support parts in a limited manner. The height of the support part is not greater than the height of the bottom of the slider, and the top of the support part is used to support the magnetic tile.

[0010] Optionally, a limiting strip is vertically protruded on the upper side of the assembly core shaft, and a limiting groove is vertically provided on the inner side wall of the support portion, and the limiting strip can be slidably disposed in the limiting groove along the vertical direction.

[0011] Optionally, a limiting pin is also included; each of the support portions is provided with a slot in the vertical direction, and adjacent slots are arranged at a preset distance in the circumferential direction, one end of the limiting pin is clamped between two adjacent sliders, and the other end of the limiting pin is inserted into the slot.

[0012] Optionally, the base has a connecting through hole connected to the bottom of the base and the card slot, and the connecting through hole is stepped; a limiting flange portion is protruding from the other end of the limiting pin, and after one end of the limiting pin is passed through the connecting through hole, the limiting flange portion can fit and abut against the stepped surface in the connecting through hole.

[0013] Optionally, it further comprises a positioning member fixed on the base, wherein the positioning member is configured such that when the housing is sleeved on the assembly spindle, the positioning member can be limitedly engaged in a through groove at the bottom of the housing.

[0014] Optionally, the vent hole has an internal thread section, and the external vent device has an external thread section, and when the external vent device extends into the vent hole, the external thread section is threadedly connected to the internal thread section.

[0015] The method for assembling a gas-expansion type magnetic tile can use the gas-expansion type magnetic tile assembly device to assemble the magnetic tile into the casing, comprising the following steps:

[0016] S1. Insert the slider into the installation groove;

[0017] S2, placing the magnetic tile on the base and fitting it to the assembly mandrel, the magnetic tile and the slider are arranged opposite to each other one by one, and applying glue on the outer surface of the magnetic tile;

[0018] S3, using the housing to sleeve the assembly mandrel and the magnetic tile inside the housing;

[0019] S4. Use external ventilation equipment to input gas into the vent hole;

[0020] S5. After a preset time period, the external ventilation device stops inputting the gas into the ventilation hole and pulls out the housing.

[0021] The beneficial effects of the present invention are as follows: first, the magnetic tile is placed on the base and connected to the assembly mandrel so that multiple magnetic tiles and multiple sliders are arranged one by one, and glue is applied on the outer surface of the magnetic tile; then the casing is sleeved on the outside of the assembly mandrel and the magnetic tile; then, an external ventilation device is used to input gas into the vent hole in the assembly mandrel, so that the gas can enter the installation groove along the vent hole and the ventilation cavity, and push the slider to slide in the installation groove in the direction close to the corresponding magnetic tile, so that the magnetic tile is pushed to the inner wall of the casing; after a certain period of time, the external ventilation device stops inputting gas into the vent hole to eliminate the thrust of the slider on the magnetic tile, and finally the casing is pulled out, and the purpose of fixing the magnetic tile in the casing is achieved. The above device is not only simple in structure and small in footprint, which greatly reduces the manufacturing cost, but also can be used for sample production and small batch production, thereby improving economic applicability; at the same time, it uses an air expansion method to assemble the magnetic tile to avoid manual assembly, thereby ensuring that the air expansion magnetic tile assembly device also has good assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 An assembly diagram between the gas expansion type magnetic tile assembly device and the housing provided by an embodiment of the present invention;

[0023] Figure 2 An assembly diagram between the air-expansion type magnetic tile assembly device and the magnetic tile provided in an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the three-dimensional structure of the air-expansion type magnetic tile assembly device provided in an embodiment of the present invention;

[0025] Figure 4 A top view of the assembly of the base and the assembly mandrel provided by an embodiment of the present invention;

[0026] Figure 5 for Figure 4 A local enlarged schematic diagram of the middle A;

[0027] Figure 6 A bottom view of a base provided by an embodiment of the present invention;

[0028] Figure 7 An assembly diagram between an assembly mandrel and a slider provided in an embodiment of the present invention;

[0029] Figure 8 A side view of the assembly mandrel and the slider after assembly provided by an embodiment of the present invention;

[0030] Fig. 9A schematic diagram of the three-dimensional structure of an assembly mandrel provided in an embodiment of the present invention;

[0031] Fig.10 A bottom view of an assembly mandrel provided by an embodiment of the present invention;

[0032] Fig.11 The present invention provides a flowchart of the method for assembling air-expansion magnetic tiles according to an embodiment of the present invention.

[0033] In the figure:

[0034] 100, magnetic tile; 200, housing;

[0035] 1. Base; 11. Fixing through hole; 12. Support part; 121. Limiting groove; 122. Card slot; 13. Connecting through hole; 131. Step surface; 2. Assembly mandrel; 21. Ventilation cavity; 22. Ventilation hole; 23. Installation groove; 231. Positioning circular hole; 24. Limiting strip; 25. Magnetic hole; 3. Slider; 31. Waist-shaped hole; 4. Limiting pin; 5. Positioning piece. DETAILED DESCRIPTION

[0036] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] When the magnetic tile 100 is fixedly assembled in the housing 200, in order to effectively simplify the structure of the existing assembly device, reduce the manufacturing cost, improve the economic applicability, and ensure good assembly efficiency, Figures 1 to 10 As shown, the present invention provides an air-expansion type magnetic tile assembly device (hereinafter referred to as "assembly device"). The assembly device includes a base 1, an assembly mandrel 2 and a plurality of sliders 3. The base 1 is fixedly arranged; the assembly mandrel 2 is vertically arranged on the base 1, and a ventilation cavity 21 and a ventilation hole 22 are provided in the assembly mandrel 2. External ventilation equipment can be connected to the ventilation hole 22 through the ventilation cavity 21, and a plurality of mounting grooves 23 are circumferentially spaced apart on the side wall of the assembly mandrel 2, and the plurality of mounting grooves 23 are all connected to the ventilation cavity 21; and the plurality of sliders 3 are inserted into the plurality of mounting grooves 23 in a limited position in the horizontal direction.

[0040] When the assembly device is in use, the magnetic tile 100 is first placed on the base 1 and is fitted and connected to the assembly core shaft 2, so that multiple magnetic tiles 100 and multiple sliders 3 are arranged opposite to each other, and glue is applied on the outer surface of the magnetic tile 100; then the casing 200 is sleeved on the outside of the assembly core shaft 2 and the magnetic tile 100; then an external ventilation device is used to input gas into the vent hole 22 in the assembly core shaft 2, so that the gas can enter the installation groove 23 along the vent hole 22 and the ventilation cavity 21, and push the slider 3 to slide in the installation groove 23 in the direction close to the corresponding magnetic tile 100, so that the outer surface of the magnetic tile 100 is pushed to fit and connect with the inner wall of the casing 200; after a certain period of time, the external ventilation device stops inputting gas into the vent hole 22, eliminates the thrust of the slider 3 on the magnetic tile 100, and finally the casing 200 is pulled out, at which time the magnetic tile 100 is fixedly installed in the casing 200.

[0041] Since the assembly device only uses the base 1, the assembly mandrel 2 and the slider 3 to realize the assembly process of the magnetic tile 100, compared with the existing assembly equipment, it not only has a simpler structure and occupies a smaller area, so that the manufacturing cost of the assembly device is greatly reduced, and using it for sample production and small batch production can also meet the requirements of economic applicability; at the same time, the staff only needs to complete the operating steps of gluing the magnetic tile 100, putting the casing 200 on the assembly mandrel 2, and pulling it off the assembly mandrel 2. The assembly of the magnetic tile 100 is mainly completed by inputting gas into the assembly mandrel 2 to drive the slider 3 to push the magnetic tile 100 against the inner wall of the casing 200, thereby avoiding manual assembly, thereby ensuring that the device also has good assembly efficiency.

[0042] In this embodiment, if Figure 1As shown, the base 1 is provided with fixing through holes 11, for example, four fixing through holes 11 are provided at equal intervals along the circumference of the base 1, and four fixing threaded holes are provided on the corresponding working plane, and the base 1 is detachably fixed to the working plane through threaded connectors (such as bolts, screws, etc.), so that the assembly device can be disassembled and used, thereby improving its flexibility of use.

[0043] In order to improve the installation stability of the assembly mandrel 2 on the base 1, a plurality of support portions 12 extending vertically upward are arranged on the base 1 along the circumferential direction. In this embodiment, the support portion 12 is arranged on the base 1 by an integral molding method, so that when the assembly mandrel 2 is limited and inserted in the plurality of support portions 12, the support portion 12 can limit the assembly mandrel 2, prevent the assembly mandrel 2 from tilting or falling, and keep the assembly mandrel 2 stably and vertically arranged on the base 1. In addition, the height of the support portion 12 is not greater than the height of the bottom of the slider 3, so as to avoid the movement path of the slider 3, ensure that the slider 3 can be pushed out by the gas, and thus push the magnetic tile 100 to the housing 200. In addition, after the magnetic tile 100 is fitted and connected with the assembly mandrel 2, it can be supported by the support portion 12. By setting the support portion 12, the distance between the magnetic tile 100 and the base 1 can be increased. At this time, the support portion 12 can be sleeved in the housing 200 to achieve the purpose of fixing the magnetic tile 100 in a deeper position in the housing 200.

[0044] It is understandable that the number of the support portions 12 is determined according to the diameter of the assembly mandrel 2 and can be two, three, four or even more, and the present invention is not limited thereto.

[0045] Furthermore, in this embodiment, combined with Figure 4 , Figure 5 As shown, four support parts 12 are arranged along the circumferential direction of the base 1, and a limiting groove 121 is vertically opened on the inner side wall of each support part 12, and four vertically extending limiting strips 24 are circumferentially arranged on the outer side surface of the assembly core shaft 2. When the assembly core shaft 2 is inserted into multiple support parts 12, each limiting strip 24 is vertically slid and inserted into the corresponding limiting groove 121, so that the tilting and rotation of the assembly core shaft 2 can be further limited during the assembly process, so as to ensure that each magnetic tile 100 can be accurately fixed and assembled at the corresponding position in the casing 200.

[0046] Optionally, combined Figure 2 , Figure 3 and Figure 5As shown, the assembly device provided in this embodiment also includes a limit pin 4, and each support portion 12 is also provided with a card slot 122 in the vertical direction, and adjacent card slots 122 are arranged at a preset distance in the circumferential direction, and one end of the limit pin 4 is clamped between two adjacent sliders 3, and the other end of the limit pin 4 is inserted into the card slot 122. Through the above arrangement, on the one hand, the limit pin 4 prevents the magnetic tile 100 from sliding and shifting in the circumferential direction, ensuring the accuracy and reliability of the positions of multiple magnetic tiles 100; on the other hand, through the cooperation of the card slot 122 and the limit pin 4, the distance between two adjacent magnetic tiles 100 in the circumferential direction can also be accurately controlled, so that the adjacent magnetic tiles 100 can be fixedly assembled in the housing 200 according to the preset distance.

[0047] Specifically, Figure 6 As shown, in this embodiment, the other end of the limit pin 4 is provided with a limit flange (not shown in the figure), and the base 1 has a connecting through hole 13 connected to the bottom of the base 1 and the card slot 122, and the connecting through hole 13 is stepped. During assembly, after one end of the limit pin 4 passes through the connecting through hole 13 and the card slot 122 in sequence, it is clamped between two adjacent sliders 3, and the limit flange on the other end of the limit pin 4 fits against the stepped surface 131 in the connecting through hole 13, so as to prevent the limit pin 4 from being separated from the base 1 together with the housing 200 when the staff pulls out the housing 200, so as to improve the integrity of the assembly device, eliminate the subsequent unnecessary process of reassembling the limit pin 4 on the base 1, and improve the efficiency of small batch production.

[0048] After the magnetic tile 100 is attached to the assembly mandrel 2 and clamped and fixed by two adjacent limit pins 4, in this embodiment, Figure 3 , Figure 7 As shown, a magnetic hole 25 is provided on the side wall of the assembly mandrel 2 and near the mounting groove 23, and magnetic parts such as neodymium iron boron, cobalt magnet, barium ferrite, etc. are embedded in the magnetic hole 25. After the magnetic tile 100 is put in place, the magnetic tile 100 can be sucked by the magnetic part to ensure that the magnetic tile 100 will not fall outward before the casing 200 is inserted, so as to ensure the efficiency of the assembly process. Preferably, a magnetic hole 25 is provided at each opposite end of each mounting groove 23 in the vertical direction to further improve the placement stability of the magnetic tile 100. It can be understood that at this time, the height of the support portion 12 needs to be lower than the height of the magnetic hole 25 located at the bottom.

[0049] Optionally, in this embodiment, the vent hole 22 has an internal threaded section, and an external ventilation device with an external threaded section (such as an air pipe and a sleeve with external threads mounted on the air pipe) is selected. After the air pipe and the sleeve are inserted into the vent hole 22, the external threaded section on the sleeve is threadedly connected to the internal threaded section of the vent hole 22, thereby preventing the external ventilation device and the assembly core shaft 2 from detaching, ensuring the stability of gas delivery, and further improving the stability of the magnetic tile 100 assembled on the casing 200.

[0050] The specific structure of the slider 3 is described in detail below. Figure 7 , Figure 8 As shown, a waist-shaped hole 31 is provided on the slider 3 along its sliding direction in the mounting groove 23, and a positioning circular hole 231 is correspondingly provided on the side wall of the mounting groove 23, and the positioning circular hole 231 is arranged opposite to the waist-shaped hole 31; in addition, the assembly device also includes a connecting member (not shown in the figure), for example, the connecting member is a pin. After the slider 3 is limitedly inserted in the mounting groove 23, the pin is inserted into the positioning circular hole 231 and the waist-shaped hole 31 in sequence, so that the slider 3 is limited in the mounting groove 23 by the action of the pin, and the reliable stability of the assembly of the slider 3 is ensured.

[0051] It is worth mentioning that after the magnetic tile 100 is fixedly connected to the housing 200, in addition to stopping the external ventilation device from continuing to input gas into the vent hole 22, the external ventilation device is also required to inhale air to reduce the air pressure in the ventilation cavity 21. The slider 3 will then move in the mounting groove 23 in the direction away from the magnetic tile 100 to achieve rapid separation between the slider 3 and the magnetic tile 100, so as to avoid the slider 3 and the magnetic tile 100 still fitting and having friction when the housing 200 is pulled out, causing the magnetic tile 100 to shift from its original position on the housing 200. Due to the limiting effect of the waist-shaped hole 31, collisions between relative or adjacent sliders 3 can be avoided, and a certain gap can be left between multiple sliders 3. After the gas enters the ventilation cavity 21, multiple sliders 3 can be quickly pushed, thereby ensuring the assembly efficiency of the magnetic tile 100.

[0052] Optionally, continue to refer to Figure 1As shown, the assembly device also includes two positioning members 5. In this embodiment, the positioning member 5 is L-shaped, and its horizontal portion can be fixedly connected to the base 1 by fasteners, and its vertical portion is fitted and connected to the outer surface of the support portion 12, and the outer contour of the vertical portion matches the through groove on the bottom of the casing 200 (generally, the through groove can be used for cable inlets and outlets, heat dissipation ports, or channels connecting the inside of the motor with external devices). In this way, in this embodiment, after the casing 200 inserts the assembly spindle 2, the support portion 12 and the magnetic tile 100, the vertical portion on the positioning member 5 is limitedly engaged in the through groove to ensure that the casing 200 does not rotate on the base 1, thereby improving the accuracy of the assembly position of the magnetic tile 100 and the assembly quality. Of course, it can be understood that the present invention selects the number of positioning members 5 according to the number of through grooves provided on the bottom of the casing 200, and the present invention is not limited to this.

[0053] The present invention also discloses a method for assembling a gas expansion type magnetic tile, as shown below: Fig.11 The specific process of the assembly method of assembling four magnetic tiles 100 into the housing 200 in the embodiment of the present invention is described below. The assembly method includes the following steps S1 to S5.

[0054] Step S1: insert the slider 3 into the installation groove 23 in a limited position.

[0055] Specifically in this embodiment, the four sliders 3 are respectively limitedly inserted in the four mounting grooves 23. In order to further improve the assembly reliability and stability of the slider 3, the waist-shaped hole 31 opened on the slider 3 is a through hole, and a positioning circular hole 231 is respectively opened on the two opposite side walls of the mounting groove 23. Two pin shafts are used to pass through the positioning circular holes 231 respectively and then inserted on both sides of the waist-shaped hole 31 relatively.

[0056] Step S2: placing the magnetic tile 100 on the base 1 and fittingly connecting it to the assembly core shaft 2, the magnetic tile 100 and the slider 3 are arranged opposite to each other, and glue is applied on the outer surface of the magnetic tile 100.

[0057] Specifically in this embodiment, the staff applies glue on the outer surface of the four magnetic tiles 100, and then vertically places the four magnetic tiles 100 on the top of the four support parts 12 respectively. The four magnetic tiles 100 and the four sliders 3 are arranged opposite to each other, and the inner surface of the magnetic tile 100 is sucked by a magnetic suction part, and the magnetic tile 100 is clamped and fixed by a limit pin 4, so that the magnetic tile 100 is stably fitted and connected to the assembly core shaft 2.

[0058] Step S3: Use the housing 200 to sleeve the assembly core shaft 2 and the magnetic tile 100 inside the housing 200 .

[0059] Specifically in this embodiment, after the through groove on the housing 200 is aligned with the positioning member 5 , the staff puts the housing 200 on the assembly core shaft 2 and wraps the support part 12 , the magnetic tile 100 and the assembly core shaft 2 .

[0060] Step S4: Use external ventilation equipment to input gas into the ventilation hole 22.

[0061] Specifically in this embodiment, an air pipe is used to pass through the vent hole 22, and the external threaded section of the sleeve is connected to the internal threaded section in the vent hole 22, and then gas is transported into the vent hole 22, so that the gas reaches the ventilation cavity 21 after passing through the vent hole 22, and pushes four sliders 3. The four sliders 3 then push the corresponding magnetic tiles 100 onto the inner wall of the casing 200, and the magnetic tiles 100 are fixed and connected to the casing 200 through the glue on the outer surface of the magnetic tiles 100.

[0062] Step S5: After a preset period of time, the external ventilation device stops inputting gas into the ventilation hole 22 and the housing 200 is pulled out.

[0063] Specifically in this embodiment, after the air pipe ventilates into the air hole 22 for 10 seconds, it stops supplying gas into the air hole 22, and then air is sucked through the air pipe to move the slider 3 in a direction away from the magnetic tile 100, and then the staff pulls out the casing 200, thereby completing the assembly of the magnetic tile 100.

[0064] The air-expansion magnetic tile assembly method provided in this embodiment requires fewer structures and simple operating steps, which helps to reduce production costs. The magnetic tile 100 can be assembled in the casing 200 in a semi-manual manner, thereby ensuring better assembly efficiency.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The gas expansion type magnetic tile assembly device is characterized in that: include: A base (1), fixedly arranged; An assembly mandrel (2) is vertically arranged on the base (1), the assembly mandrel (2) has a ventilation cavity (21) and a ventilation hole (22), the ventilation cavity (21) is connected to an external ventilation device through the ventilation hole (22), and a plurality of mounting grooves (23) are arranged at intervals along the circumferential direction on the side wall of the assembly mandrel (2), and the plurality of mounting grooves (23) are connected to the ventilation cavity (21); A plurality of sliders (3) are inserted into the plurality of mounting grooves (23) in a horizontally limited manner, and gas can enter the plurality of mounting grooves (23) through the ventilation holes (22) and the ventilation cavities (21) in sequence, so that the sliders (3) can slide in the mounting grooves (23).

2. The air expansion type magnetic tile assembly device according to claim 1, characterized in that: The sliding block (3) is provided with a waist-shaped hole (31) along the sliding direction, and the side wall of the mounting groove (23) is provided with a positioning circular hole (231), and the positioning circular hole (231) is arranged corresponding to the waist-shaped hole (31); the air-expansion magnetic tile assembly device also includes a connecting piece, and the connecting piece is inserted into the positioning circular hole (231) and the waist-shaped hole (31) in sequence.

3. The air expansion type magnetic tile assembly device according to claim 1, characterized in that: A magnetic attraction piece is arranged on the side wall of the assembly core shaft (2).

4. The air expansion type magnetic tile assembly device according to claim 1, characterized in that: The base (1) is provided with a plurality of support parts (12) extending vertically upward along the circumferential direction, the assembly core shaft (2) can be inserted into the plurality of support parts (12) in a limited manner, the height of the support part (12) is not greater than the height of the bottom of the slider (3), and the top of the support part (12) is used to support the magnetic tile (100).

5. The air expansion type magnetic tile assembly device according to claim 4, characterized in that: A limiting strip (24) is vertically protruded on the assembly core shaft (2), and a limiting groove (121) is vertically provided on the inner side wall of the support portion (12), and the limiting strip (24) is vertically slidably arranged in the limiting groove (121).

6. The air expansion type magnetic tile assembly device according to claim 4, characterized in that: It also includes a limiting pin (4); each of the supporting parts (12) is provided with a slot (122) in the vertical direction, and adjacent slots (122) are arranged at a preset distance in the circumferential direction; one end of the limiting pin (4) is clamped between two adjacent sliders (3), and the other end of the limiting pin (4) is inserted into the slot (122).

7. The air expansion type magnetic tile assembly device according to claim 6, characterized in that: The base (1) has a connecting through hole (13) connected to the bottom of the base (1) and the card slot (122), and the connecting through hole (13) is stepped; the other end of the limiting pin (4) is provided with a protruding limiting flange portion, and after one end of the limiting pin (4) is inserted into the connecting through hole (13), the limiting flange portion can be fitted and abutted against the stepped surface (131) in the connecting through hole (13).

8. The air expansion type magnetic tile assembly device according to claim 1, characterized in that: It also includes a positioning member (5) fixedly mounted on the base (1), wherein the positioning member (5) is configured such that when the housing (200) is sleeved on the assembly spindle (2), the positioning member (5) can be limitedly engaged in a through groove at the bottom of the housing (200).

9. The air expansion type magnetic tile assembly device according to claim 1, characterized in that: The vent hole (22) has an internal thread section, and the external vent device has an external thread section. When the external vent device extends into the vent hole (22), the external thread section is threadedly connected to the internal thread section.

10. A method for assembling a gas expansion type magnetic tile, characterized in that: The magnetic tile (100) can be assembled into a housing (200) using the gas expansion type magnetic tile assembly device described in any one of claims 1 to 9, comprising the following steps: S1, inserting the slider (3) into the mounting groove (23) in a limited position; S2, placing the magnetic tile (100) on the base (1) and fittingly connecting it to the assembly core shaft (2), the magnetic tile (100) and the slider (3) are arranged one by one opposite to each other, and glue is applied on the outer surface of the magnetic tile (100); S3, using the housing (200) to sleeve the assembly mandrel (2) and the magnetic tile (100) inside the housing (200); S4, using external ventilation equipment to input gas into the vent hole (22); S5. After a preset time period, the external ventilation device stops inputting the gas into the ventilation hole (22) and pulls out the housing (200).

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