A pre-assembly tool for a magnetic steel kit

Abstract

This invention proposes a pre-assembly fixture for a magnetic steel kit, including a worktable with a support base on its top surface. The top surface of the worktable has two rows of placement slots arranged in an array, and each placement slot has a number of uniformly arranged adsorption pores on its inner wall. An air guide channel communicating with the adsorption pores is opened inside the support base. A connector communicating with the air guide channel is provided on one side of the support base for connecting to an external negative pressure air source. A lower pressure seat is located at the Z-axis output end of the X-Z axis motion unit. The lower pressure seat is divided into an upper layer (metal layer) and a lower layer (plastic layer). The bottom surface of the lower layer of the lower pressure seat has two rows of slots arranged in an array, with each slot corresponding to one of the placement slots. This invention solves the problems of low efficiency and poor consistency in manual pre-assembly through the synergistic effect of magnetic fixation of the magnet, negative pressure adsorption of the steel sleeve, and mechanical alignment design. It replaces manual labor, achieves multi-station synchronous pre-assembly, and significantly improves efficiency.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing technology, specifically, it demonstrates a pre-assembly fixture for a magnet assembly kit. Background Technology

[0002] During the manufacturing process of a brushless motor rotor, a cylindrical magnet needs to be inserted into a hollow cylindrical steel sleeve. The current standard practice is to manually insert the magnet partially into the sleeve, leaving the remaining portion exposed, and then use a riveting machine to fully rivet the magnet into the sleeve. Afterward, the edges of the sleeve are folded to seal the sleeve and prevent the magnet from accidentally slipping out later.

[0003] The pre-assembly process involves partially inserting the magnet into the steel sleeve to roughly position the magnet and the sleeve, which facilitates the subsequent riveting work. However, the current manual pre-assembly is time-consuming and labor-intensive, requiring workers to perform it one by one, resulting in low work efficiency, high labor intensity, and poor consistency of the pre-assembled kits, with inconsistent lengths of the exposed magnets, which affects the subsequent riveting work. Utility Model Content

[0004] The purpose of this invention is to provide a pre-assembly fixture for magnet kits, which enables batch production and saves time and effort.

[0005] The technical solution is as follows:

[0006] A pre-assembly fixture for a magnet assembly includes a worktable on which:

[0007] The support base has two rows of placement slots arranged in an array on its top surface. Each placement slot has a number of adsorption pores evenly constructed on its inner wall. An air guide channel is opened inside the support base and communicates with the adsorption pores. A connector is provided on one side of the support base and communicates with the air guide channel. The connector is used to connect to an external negative pressure air source.

[0008] The XZ axis motion unit is located close to the bearing base;

[0009] The pressure seat is located at the Z-axis output end of the XZ-axis motion unit. The pressure seat is divided into an upper layer and a lower layer. The upper layer is a metal layer and the lower layer is a plastic layer. The bottom surface of the lower layer of the pressure seat has two rows of slots arranged in an array, and the slots correspond one-to-one with the placement slots.

[0010] In addition, the above embodiments of this utility model may also have the following additional technical features:

[0011] According to one embodiment of this utility model, when the lower pressure seat moves directly above the bearing base, the center of the slot and the center of the placement slot are on the same vertical line. The vertical coaxiality of the slot and the placement slot ensures that the magnet can be inserted vertically into the steel sleeve, avoiding jamming or damage due to tilting; after the top of the magnet is adsorbed onto the upper layer of the metal layer, mechanical coaxial alignment further ensures the coaxiality of the magnet and the steel sleeve, improving pre-assembly consistency.

[0012] The inner diameter of the slot is smaller than the inner diameter of the lower part of the placement slot. This design is suitable for the insertion of magnets and steel sleeves, respectively. During pre-assembly, there will be no deviation in the slot / placement slot, reducing gaps.

[0013] According to one embodiment of this utility model, the top end of the placement slot is constructed as a constricted opening. This primarily provides guidance for the insertion of the magnet and assists in the initial insertion of the magnet into the steel sleeve.

[0014] According to one embodiment of this utility model, the bottom end of the lower pressure seat is provided with a downwardly protruding guide shaft, and the top of the bearing base is provided with a positioning groove; when the lower pressure seat approaches the bearing base downward until it abuts against the bearing base, the guide shaft can be inserted into the positioning groove accordingly. When the guide shaft is inserted into the positioning groove, it ensures that the planar position of the lower pressure seat and the bearing base is accurate, and ensures that the slot and the placement hole are completely aligned.

[0015] According to one embodiment of this utility model, a lifting frame is provided on the top of the workbench, and the supporting base is installed on the lifting frame. Raising the supporting base to a suitable height makes it easier for operators to place the steel sleeve, reduces bending over, and lowers labor intensity.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model solves the problems of low efficiency and poor consistency of manual pre-assembly by using magnetic attraction to fix the magnet, negative pressure adsorption of the steel sleeve, mechanical alignment design and flexible downward pressure. It replaces manual labor, realizes multi-station synchronous pre-assembly, and significantly improves efficiency. Attached Figure Description

[0017] Figure 1 This is a simplified schematic diagram of a pre-assembly fixture for a magnet kit according to an embodiment of the present invention;

[0018] Figure 2 This is a top view schematic diagram of the bearing base according to an embodiment of the present utility model;

[0019] Figure 3 This is a simplified cross-sectional schematic diagram of the bearing base according to an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the lower pressure seat according to an embodiment of the present utility model;

[0021] The relevant markings in the attached diagram are: 1-worktable surface, 2-support base, 3-XZ axis motion unit, 4-lower pressure seat, 5-elevating frame; 21-placement slot, 22-air guide channel, 23-connector, 24-positioning slot, 211-contraction opening, 212-adsorption air hole; 41-upper layer, 42-lower layer, 421-slot, 422-guide shaft. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown in the figure, this utility model embodiment proposes a pre-assembly fixture for a magnet assembly kit, mainly used for the pre-assembly of a cylindrical magnet and a hollow cylindrical steel sleeve. The fixture first includes a horizontal worktable 1, on which a bearing base 2, an XZ axis motion unit 3, and a pressure seat 4 are arranged.

[0024] The support base 2 is arranged horizontally. Two rows of placement slots 21 are arrayed on the top surface of the support base 2. Each placement slot 21 is cylindrical and recessed into the support base 2. The spacing between adjacent placement slots 21 in the same row is uniform. Several adsorption pores 212 are evenly formed on the inner wall of each placement slot 21. An air guiding channel 22 is provided inside the support base 2, communicating with these adsorption pores 212. One end extends toward the outer wall of the support base 2 and connects to a connector 23. The connector 23 is fixed on the outer wall of one side of the support base 2 and can communicate with this end of the air guide channel 22. The connector 23 is used to connect to an external negative pressure air source. After the negative pressure air source is turned on, a number of adsorption holes 212 on the inner wall of the placement slot 21 can form a certain adsorption effect. When the steel sleeve is inserted into the placement slot 21, these adsorption holes 212 make the steel sleeve stably placed in the placement slot 21, avoiding manual alignment errors and offset.

[0025] The XZ axis motion unit 3 is located near the bearing base 2 and is a conventional XZ axis linear displacement module, which can provide linear displacement drive in the lateral and longitudinal directions. It should be noted that in this embodiment, the lateral drive stroke of the XZ axis motion unit 3 can be designed as a fixed stroke, that is, moving from position A to position B and then from position B to position A.

[0026] The lower pressure seat 4 is also horizontally positioned above the bearing base 2. The lower pressure seat 4 is located on the Z-axis output end of the aforementioned XZ-axis motion unit 3. Under the driving action of the XZ-axis motion unit 3, the lower pressure seat 4 can move relative to the bearing base 2 in the left-right and up-down directions. The central axis of the lower pressure seat 4 along its length and the central axis of the bearing base 2 along their length are located on the same vertical plane. The lower pressure seat 4 is divided into an upper layer 41 and a lower layer 42. The upper layer 41 is a metal layer, such as iron, and the lower layer 42 is a plastic layer, such as plastic. The bottom surface of layer 42 has two rows of slots 421 arranged in an array. The positions and numbers of the slots 421 correspond one-to-one with the positions of the placement holes 21. The magnet is inserted vertically into the slot 421. Because the magnet is magnetic, the side wall of the magnet will not be magnetically attracted to the lower plastic layer 42, while the top of the magnet can be magnetically attracted to the upper metal layer 41. This ensures that the magnet remains vertical in the slot 421, avoids tilting or falling off during manual placement, and ensures that the magnet is stably attached to the slot during the pressing process, thus achieving the positioning of the magnet.

[0027] The corresponding workflow is as follows: The operator places the steel sleeves one by one into the placement slots 21 on the bearing base 2, and starts the negative pressure air source to make the steel sleeves stably placed in the placement slots 21; similarly, the operator places the magnets one by one into the slots 421 on the lower pressure seat 4, and the magnets are attracted to the lower pressure seat 4; the XZ axis motion unit 3 is controlled to drive the lower pressure seat 4 to move accurately above the bearing base 2, and then the lower pressure seat 4 is driven to move towards the bearing base 2 until each magnet is pressed into the corresponding steel sleeve to the preset depth; finally, the lower pressure seat 4 is controlled to rise. Since the magnetic effect of the magnet is not very strong, the top of the magnet can easily detach from the upper layer 41 of the lower pressure seat 4, and will not lift the steel sleeve below. Then the pre-assembled magnet kit is removed from the bearing base 4 and riveted by other equipment.

[0028] It should be noted that when the pressing base 4 moves to directly above the bearing base 2 under the action of the XZ axis motion unit 3, the center of each slot 421 and the center of each placement slot 21 are on the same vertical line. The vertical coaxiality of the slots and placement slots ensures that the magnet can be inserted vertically into the steel sleeve, avoiding jamming or damage due to tilting; after the top of the magnet is attracted to the upper layer of the metal layer, mechanical coaxial alignment further ensures the coaxiality of the magnet and the steel sleeve, improves the consistency of pre-assembly, reduces rework caused by alignment deviation, ensures uniform magnet insertion depth, and facilitates the standardization of subsequent riveting processes.

[0029] Furthermore, the inner diameter of slot 421 is smaller than the inner diameter of the lower part of placement slot 21, so the actual diameter of the magnet is slightly smaller than the inner diameter of the steel sleeve. The slot and placement slot are respectively suitable for the insertion of the magnet and the steel sleeve. During pre-assembly, there will be no deviation in the slot / placement slot, reducing gaps.

[0030] In one embodiment, the top of the placement slot 21 is constructed as a constricted opening 211. The constricted opening is designed primarily to provide guidance for the insertion of the magnet, assisting in the initial insertion of the magnet into the steel sleeve, and simplifying alignment.

[0031] In one embodiment, the bottom end of the lower pressure seat 4 is provided with a downwardly protruding guide shaft 422, and the top of the bearing base 2 is provided with a positioning groove 24. When the lower pressure seat 4 approaches the bearing base 2 downward until it abuts against the bearing base 2, the guide shaft 422 can be correspondingly inserted into the positioning groove 24. When the guide shaft is inserted into the positioning groove, it ensures that the planar position of the lower pressure seat and the bearing base is accurate, and ensures that the slot and the placement hole are completely aligned.

[0032] In other possible implementations, a lifting frame 5 is provided on the top of the workbench 1, and a support base 2 is installed on the lifting frame 5. The lifting frame raises the support base to a suitable height, making it easier for operators to place the steel sleeve, reducing bending movements, lowering labor intensity, improving operating comfort and the rationality of equipment layout, and adapting to the needs of long-term continuous operation.

[0033] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A pre-assembly fixture for a magnet assembly, comprising a worktable (1), characterized in that, The workbench (1) is provided with: The support base (2) has two rows of placement slots (21) arranged in an array on its top surface. Each placement slot (21) has a number of adsorption pores (212) uniformly constructed on its inner wall. An air guiding channel (22) is opened inside the support base (2) and communicates with the number of adsorption pores (212). A connector (23) is provided on one side of the support base (2) and communicates with the air guiding channel (22). The connector (23) is used to connect to an external negative pressure air source. The XZ axis motion unit (3) is located close to the bearing base (2); The pressure seat (4) is located at the Z-axis output end of the XZ-axis motion unit (3). The pressure seat (4) is divided into an upper layer (41) and a lower layer (42). The upper layer (41) is a metal layer and the lower layer (42) is a plastic layer. The bottom surface of the lower layer (42) of the pressure seat (4) is arranged in an array with two rows of slots (421). The slots (421) correspond one-to-one with the placement slots (21).

2. The pre-assembly fixture for a magnet assembly according to claim 1, characterized in that, When the lower pressure seat (4) moves directly above the bearing base (2), the center of the slot (421) and the center of the placement slot (21) are on the same vertical line.

3. The pre-assembly fixture for a magnet assembly according to claim 2, characterized in that, The inner diameter of the slot (421) is smaller than the inner diameter of the lower part of the placement slot (21).

4. The pre-assembly fixture for a magnet assembly according to claim 1, characterized in that, The top of the placement slot (21) is constructed as a constricted opening (211).

5. The pre-assembly fixture for a magnet assembly according to claim 1, characterized in that, The bottom end of the lower pressure seat (4) is provided with a downward protruding guide shaft (422), and the top of the bearing base (2) is provided with a positioning groove (24); when the lower pressure seat (4) approaches the bearing base (2) downward until it abuts against the bearing base (2), the guide shaft (422) can be inserted into the positioning groove (24) accordingly.

6. The pre-assembly fixture for a magnet assembly according to claim 1, characterized in that, The top of the workbench (1) is provided with a lifting frame (5), and the bearing base (2) is installed on the lifting frame (5).

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