Reversing product assembly tooling and assembly method

Abstract

The present invention discloses an assembly tooling for a commutation product. Its rotor fixing block is fixed on the lower die base, used to place the rotor of the product and make its horizontal round hole or horizontal groove in the left - right direction; two steel ball pre - installation blanking positioning blocks are respectively arranged on the left - right guide rails on the left and right sides of the rotor fixing block; the steel ball pre - installation blanking positioning block is formed with a vertical feeding hole and a horizontal discharging hole, and the lower end of the vertical feeding hole communicates with the horizontal discharging hole; a steel ball push rod is inserted into the horizontal discharging hole, used to push the steel balls falling to the lower end of the vertical feeding hole towards the near - rotor - fixing - block of the horizontal discharging hole, so that the steel balls enter the horizontal round hole or horizontal groove of the rotor placed on the rotor fixing block; the holding column is arranged directly above the rotor fixing block and can move up and down; two vertical inserting fingers are formed at the lower end of the holding column. The present invention also discloses an assembly method. The present invention can accurately install the spring and double steel balls into the commutation product, with simple structure, compact space, reliable limit, simple and reliable steps in the assembly process of the commutation product, and low cost.

Description

Technical Field

[0001] The present invention relates to the assembly technology of mechanical products, and relates to an assembly tooling and an assembly method for a commutation product. Background Art

[0002] As shown in Figure 3 a commutation product includes a rotor 11 and a housing 12; the housing 12 is sleeved on the rotor 11, and both ends of a helical spring 13 in a transverse circular hole or a transverse groove of the housing 12 are abutted by steel balls on the side wall of the housing 12, so that the helical spring 13 is compressed and deformed, and the rotor 11 can rotate relative to the housing 12. During the assembly process of the commutation product, it is crucial to correctly install the left and right springs of the helical spring 13 (with a length of about 8 mm and a diameter of about 2 mm) into the commutation product, and install a steel ball (with a diameter of about 2.5 mm) at each end of the helical spring 13. In production, there are difficulties such as great manual assembly difficulty, long operation time, easy ejection of steel balls, difficult detection after installation, and low automation degree. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to accurately install the spring and double steel balls into the commutation product, with a simple structure, a compact space, reliable limiting, simple and reliable steps in the assembly process of the commutation product, and low cost.

[0004] To solve the above technical problem, the assembly tooling for the commutation product provided by the present invention, the commutation product includes a rotor 11 and a housing 12; the rotor 11 is cylindrical, and a transverse circular hole or a transverse groove with an upper side opening is provided at its upper end; the assembly tooling includes a lower die base 5, a rotor fixing block 1, a steel ball preloading and blanking positioning block 2, a steel ball push rod 3 and a retaining column 4;

[0005] The rotor fixing block 1 is fixedly arranged on the lower die base 5 for placing and fixing the rotor 11 and making its transverse circular hole or transverse groove in the left - right direction;

[0006] The lower die base 5 is respectively fixedly provided with left - right guide rails on the left and right sides of the rotor fixing block 1;

[0007] Two steel ball preloading and blanking positioning blocks 2 are respectively arranged on the left - right guide rails on the left and right sides of the rotor fixing block 1 and can slide along the left - right guide rails;

[0008] The steel ball preloading and blanking positioning block 2 is formed with a vertical feeding hole and a transverse discharging hole;

[0009] The lower end of the vertical feeding hole communicates with the transverse discharging hole;

[0010] A steel ball push rod 3 is inserted into the horizontal discharge hole of the steel ball preloading blanking positioning block 2, which is used to push the steel balls falling to the lower end of the vertical feed hole towards the end of the horizontal discharge hole near the rotor fixing block 1, so that the steel balls enter the horizontal circular holes or horizontal grooves of the rotor placed and fixed on the rotor fixing block 1;

[0011] The holding column 4 is arranged directly above the rotor fixing block 1 and can move up and down;

[0012] Two vertical insertion fingers 41 arranged horizontally in a fork shape are formed at the lower end of the holding column 4.

[0013] Preferably, R < W < R + 0.9r, where W is the distance between the two vertical insertion fingers 41, R is the outer diameter of the rotor 11, and r is the diameter of the horizontal circular hole or horizontal groove.

[0014] Preferably, the commutation product assembly tooling further includes a housing pressing block 7;

[0015] The housing pressing block 7 is sleeved on the holding column 4 and can move up and down along the holding column 4;

[0016] When the housing 12 is sleeved on the holding column 4 on the lower side of the housing pressing block 7, and the two vertical insertion fingers at the lower end of the holding column 4 extend down to the left and right sides of the rotor 11 placed and fixed on the rotor fixing block 1, press down the housing pressing block 7 to move the housing 12 downward so that the housing 12 is sleeved outside the rotor 11.

[0017] Preferably, the holding column 4 is an elliptical cylinder or a polygonal prism;

[0018] The side wall of the housing 12 encloses a circular ring adapted to the cylindrical rotor 11;

[0019] The lower end of the housing 12 is open, and a hole adapted to the elliptical cylinder or polygonal prism is formed in the center of the upper end top plate.

[0020] Preferably, the housing pressing block 7 is driven to move up and down by a cylinder;

[0021] The steel ball preloading blanking positioning block 2 is driven to move left and right by a cylinder;

[0022] The steel ball push rod 3 is driven to move left and right by a cylinder.

[0023] Preferably, the upper part of the end of the steel ball push rod 3 near the rotor fixing block 1 is removed to form a stepped shape.

[0024] Preferably, the left-right thickness of the vertical insertion finger 41 is smaller than the width of the step at the end of the steel ball push rod 3 near the rotor fixing block 1.

[0025] Preferably, the diameter of the horizontal discharge hole of the steel ball preloading blanking positioning block 2 is the same as the diameter of the horizontal round hole or horizontal groove of the rotor 11.

[0026] Preferably, the commutation product assembly tooling further includes an upper die cover plate 6 and guide posts 61;

[0027] The upper end of the holding post 4 is fixedly connected to the lower side surface of the middle part of the upper die cover plate 6;

[0028] The upper end of the guide post 61 is fixedly connected to the lower side surface of the corner part of the upper die cover plate 6;

[0029] The lower die base 5 is formed with guide holes adapted to the guide posts 61;

[0030] The guide posts 61 are inserted into the guide holes.

[0031] Preferably, there are 2 guide posts 61 respectively fixedly connected to the lower side surfaces of the two corner parts of the upper die cover plate 6.

[0032] The method for assembling the commutation product of the commutation product assembly tooling includes the following steps:

[0033] I. Horizontally insert a helical spring 13 into the horizontal round hole or horizontal groove of the rotor 11 of the commutation product;

[0034] II. Place and fix the rotor 11 with the helical spring 13 installed on the rotor fixing block 1, and make the horizontal round hole or horizontal groove of the rotor 11 in the left - right direction;

[0035] III. Move the two steel ball preloading blanking positioning blocks 2 towards the rotor fixing block 1, so that the horizontal discharge holes are close to and aligned with the horizontal round holes or horizontal grooves of the rotor 11;

[0036] IV. Add one steel ball into each of the vertical feeding holes of the two steel ball preloading blanking positioning blocks 2;

[0037] V. Push the steel ball push rod 3 inserted into the horizontal discharge hole of the steel ball preloading blanking positioning block 2 towards the rotor fixing block 1, and push the steel ball falling to the lower end of the vertical feeding hole towards the end near the rotor fixing block 1 of the horizontal discharge hole, so that the steel ball is pre - pressed into the horizontal round hole or horizontal groove of the rotor 11 placed and fixed on the rotor fixing block 1;

[0038] VI. Press down the holding post 4 sleeved with the housing 12, so that the two vertical inserting fingers 41 at the lower end of the holding post 4 respectively insert downward and contact the steel ball push rod 3, and fasten the steel balls at both ends of the helical spring 13 to keep them in the horizontal round hole or horizontal groove;

[0039] VII. Move the steel ball push rod 3 and the steel ball preloading blanking positioning block 2 outward away from the rotor fixing block 1;

[0040] VIII. Push down the housing pressing block 7 to press down and sleeved the housing 12 onto the rotor 11.

[0041] Preferably, the commutation product assembly tooling further includes an upper die cover plate 6 and guide posts 61;

[0042] The upper end of the holding post 4 is fixedly connected to the lower side surface of the middle part of the upper die cover plate 6;

[0043] The upper end of the guide post 61 is fixedly connected to the lower side surface of the corner part of the upper die cover plate 6;

[0044] The lower die base 5 is formed with guide holes adapted to the guide posts 61;

[0045] The guide posts 61 are inserted into the guide holes;

[0046] In step VI, move the upper die cover plate 6 to insert the guide posts 61 downward into the guide holes of the lower die base 5, so as to press down the holding post 4 sleeved with the housing 12, and make the two vertical fingers 41 of the holding post 4 respectively insert downward and contact the steel ball push rod 3, and fasten the steel balls at both ends of the spiral spring 13 to keep them in the horizontal round holes or horizontal grooves.

[0047] Preferably, the radial cross-section of the horizontal groove is an arc greater than 180 0 arc;

[0048] The axis of the horizontal round hole or horizontal groove is perpendicular to and intersects with the axis of the rotor 11.

[0049] Preferably, the radial cross-section of the horizontal groove is an arc of 210 0 ~330 0 arc.

[0050] Preferably, a concave pit 121 is formed on the side wall of the housing 12;

[0051] The diameter of the concave pit 121 is smaller than the diameter of the steel ball;

[0052] In step VIII, after pressing down and sleeving the housing 12 onto the rotor 11, the side wall of the housing 12 abuts against the steel balls at both ends of the spiral spring 13 in the horizontal round hole or horizontal groove of the housing 12 to cause the spiral spring 13 to be compressed and deformed, and the rotor 11 can rotate relative to the housing 12; when the housing 12 and the rotor 11 rotate relative to each other and the horizontal round hole or horizontal groove corresponds to the concave pit 121, the compression deformation force of the spiral spring 13 will cause a part of the steel ball to extend into the concave pit 121.

[0053] The commutation product assembly tooling of the present invention adopts reliable mechanical features in the assembly stage, designs a reliable feeding channel according to the shape of the commutation product, and installs a steel ball push rod to reliably press the steel balls, which can pre-assemble and hold the position of the spring and double steel balls, and can sleeve the rotor 11 with the pre-assembled spring and steel balls into the housing 12, ensuring that the spring and steel balls are accurately pre-assembled into the rotor 11 and then sleeved into the housing 12 together. Thus, the spring and double steel balls can be accurately installed into the commutation product. The structure is simple, the space is compact, the limit is reliable, each step in the commutation product assembly process is simple and reliable, the cost is low, and it can be further automated. It is of great significance to improve the production efficiency and quality control of the commutation product. Brief Description of the Drawings

[0054] In order to more clearly illustrate the technical solutions of the present invention, the following briefly introduces the drawings required for the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0055] Figure 1 is a perspective view of an embodiment of the commutation product assembly tooling of the present invention;

[0056] Figure 2 is a sectional view of an embodiment of the commutation product assembly tooling of the present invention;

[0057] Figure 3 is a schematic diagram after the commutation product assembly is completed.

[0058] Explanation of the reference numerals in the drawings:

[0059] 11 Rotor; 12 Housing; 13 Helical spring; 121 Pit; 5 Lower die base; 1 Rotor fixing block; 2 Steel ball pre-assembly blanking positioning block; 3 Steel ball push rod; 4 Retaining column; 41 Inserting finger; 7 Housing pressing block; 6 Upper die cover plate; 61 Guide post. Detailed Embodiments

[0060] The following will clearly and completely describe the technical solutions in the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present invention belong to the scope of protection of the present invention.

[0061] Embodiment 1

[0062] A commutation product assembly tooling is as Figure 1 、 Figure 2 shown. The commutation product includes a rotor 11 and a housing 12; the rotor 11 is cylindrical, and a transverse circular hole or a transverse groove with an upper side opening is provided at its upper end;

[0063] The assembly tooling includes a lower die base 5, a rotor fixing block 1, a steel ball preloading and blanking positioning block 2, a steel ball push rod 3 and a holding column 4;

[0064] The rotor fixing block 1 is fixedly arranged on the lower die base 5 and is used for placing and fixing the rotor 11 so that its horizontal circular hole or horizontal groove is in the left - right direction;

[0065] The lower die base 5 is fixedly provided with left - right guide rails on both the left and right sides of the rotor fixing block 1;

[0066] Two steel ball preloading and blanking positioning blocks 2 are respectively arranged on the left - right guide rails on both the left and right sides of the rotor fixing block 1 and can slide along the left - right guide rails;

[0067] The steel ball preloading and blanking positioning block 2 is formed with a vertical feeding hole and a horizontal discharging hole;

[0068] The lower end of the vertical feeding hole communicates with the horizontal discharging hole;

[0069] A steel ball push rod 3 is inserted into the horizontal discharging hole of the steel ball preloading and blanking positioning block 2, which is used to push the steel balls falling to the lower end of the vertical feeding hole towards the end of the horizontal discharging hole near the rotor fixing block 1, so that the steel balls enter the horizontal circular hole or horizontal groove of the rotor placed and fixed on the rotor fixing block 1;

[0070] The holding column 4 is arranged directly above the rotor fixing block 1 and can move up and down;

[0071] The lower end of the holding column 4 is formed with two vertical insertion fingers 41 arranged in a fork shape from left to right.

[0072] Preferably, R < W < R + 0.9r, where W is the distance between the two vertical insertion fingers 41, R is the outer diameter of the rotor 11, and r is the diameter of the horizontal circular hole or horizontal groove.

[0073] The commutation product assembly tooling of Embodiment 1 adopts reliable mechanical features in the assembly stage, designs a reliable feeding channel according to the shape of the commutation product, and installs a steel ball push rod to reliably press the steel balls. It can pre - install and hold the position of the spring and double steel balls, and can sleeve the rotor 11 after pre - installing the spring and steel balls into the housing 12, ensuring that the spring and steel balls are accurately pre - installed into the rotor 11 and then sleeved into the housing 12 together. Thus, the spring and double steel balls can be accurately installed into the commutation product. The structure is simple, the space is compact, the limit is reliable, each step in the commutation product assembly process is simple and reliable, the cost is low, and it can be further automated. It is of great significance to the improvement of the production efficiency and quality control of the commutation product.

[0074] Embodiment 2

[0075] Based on Embodiment 1, the commutation product assembly tooling further includes a housing pressing block 7;

[0076] The housing pressing block 7 is sleeved on the holding column 4 and can move up and down along the holding column 4;

[0077] When the housing 12 is sleeved on the holding column 4 on the lower side of the housing pressing block 7, and the two vertical fingers at the lower end of the holding column 4 extend down to the left and right sides of the rotor 11 placed and fixed on the rotor fixing block 1, press down the housing pressing block 7 to move the housing 12 downward so that the housing 12 is sleeved outside the rotor 11.

[0078] Preferably, the holding column 4 is an elliptical cylinder or a polygonal prism;

[0079] The side wall of the housing 12 encloses a circular ring adapted to the cylindrical rotor 11;

[0080] The lower end of the housing 12 is open, and a hole adapted to the elliptical cylinder or the polygonal prism is formed in the center of the upper end top plate.

[0081] Preferably, the housing pressing block 7 is driven to move up and down by a cylinder;

[0082] The steel ball preloading blanking positioning block 2 is driven to move left and right by a cylinder;

[0083] The steel ball push rod 3 is driven to move left and right by a cylinder.

[0084] Embodiment III

[0085] Based on the commutation product assembly tooling of Embodiment I, the upper part of the end of the steel ball push rod 3 near the rotor fixing block 1 is removed to form a step shape.

[0086] Preferably, the left - right thickness of the vertical finger 41 is less than the width of the step at the end of the steel ball push rod 3 near the rotor fixing block 1.

[0087] Preferably, the diameter of the transverse discharge hole of the steel ball preloading blanking positioning block 2 is the same as the diameter of the transverse circular hole or transverse groove of the rotor 11.

[0088] For the commutation product assembly tooling of Embodiment III, the upper part of the end of the steel ball push rod 3 near the rotor fixing block 1 is removed to form a step shape. When the end of the steel ball push rod 3 near the rotor fixing block 1 pushes the steel ball to one end of the transverse circular hole or transverse groove of the rotor 11, the vertical finger 41 at the lower end of the pressing holding column 4 will extend into the step at the end of the steel ball push rod 3 near the rotor fixing block 1 to limit the steel ball in the transverse circular hole or transverse groove of the rotor 11.

[0089] Embodiment IV

[0090] Based on Embodiment I, the commutation product assembly tooling further includes an upper die cover plate 6 and a guide post 61;

[0091] The upper end of the holding column 4 is fixedly connected to the lower side of the middle part of the upper die cover plate 6;

[0092] The upper end of the guiding column 61 is fixedly connected to the lower side of the corner part of the upper die cover plate 6;

[0093] The lower die base 5 is formed with guiding holes adapted to the guiding columns 61;

[0094] The guiding columns 61 are inserted into the guiding holes.

[0095] Preferably, there are two guiding columns 61 respectively fixedly connected to the lower sides of two corner parts of the upper die cover plate 6.

[0096] Embodiment Five

[0097] A method for assembling a commutation product of the commutation product assembly tooling of Embodiment One, Two or Three includes the following steps:

[0098] 1. Horizontally insert a helical spring 13 into the horizontal circular hole or horizontal groove of the rotor 11 of the commutation product;

[0099] 2. Place and fix the rotor 11 equipped with the helical spring 13 onto the rotor fixing block 1, and make the horizontal circular hole or horizontal groove of the rotor 11 in the left - right direction;

[0100] 3. Move the two steel ball pre - loading blanking positioning blocks 2 towards the rotor fixing block 1, so that the horizontal discharge holes are close to and aligned with the horizontal circular hole or horizontal groove of the rotor 11;

[0101] 4. Add one steel ball into each of the vertical feeding holes of the two steel ball pre - loading blanking positioning blocks 2;

[0102] 5. Push the steel ball push rod 3 inserted into the horizontal discharge hole of the steel ball pre - loading blanking positioning block 2 towards the rotor fixing block 1, and push the steel ball falling to the lower end of the vertical feeding hole towards the end near the rotor fixing block 1 of the horizontal discharge hole, so that the steel ball is pre - pressed into the horizontal circular hole or horizontal groove of the rotor 11 placed and fixed on the rotor fixing block 1;

[0103] 6. Press down the holding column 4 sleeved with the housing 12, so that the two vertical inserting fingers 41 at the lower end of the holding column 4 respectively insert and contact the steel ball push rod 3, and fasten the steel balls at both ends of the helical spring 13 to keep them in the horizontal circular hole or horizontal groove;

[0104] 7. Move the steel ball push rod 3 and the steel ball pre - loading blanking positioning block 2 outwards away from the rotor fixing block 1;

[0105] 8. Push down the housing pressing block 7 to press down the housing 12 and sleeve it onto the rotor 11.

[0106] Preferably, the commutation product assembly tooling further includes an upper die cover plate 6 and guiding columns 61;

[0107] The upper end of the holding post 4 is fixedly connected to the lower side surface of the middle part of the upper die cover plate 6;

[0108] The upper end of the guiding post 61 is fixedly connected to the lower side surface of the corner part of the upper die cover plate 6;

[0109] The lower die base 5 is formed with a guiding hole adapted to the guiding post 61;

[0110] The guiding post 61 is inserted into the guiding hole;

[0111] In step six, move the upper die cover plate 6 to insert the guiding post 61 downward into the guiding hole of the lower die base 5, so as to press down the holding post 4 sleeved with the housing 12, and make the two vertical fingers 41 of the holding post 4 respectively insert downward to contact the steel ball push rod 3, and fasten the steel balls at both ends of the spiral spring 13 to keep them in the transverse round hole or transverse groove.

[0112] Preferably, the commutation product assembly tooling further includes an upper die cover plate 6 and a guiding post 61;

[0113] The upper end of the holding post 4 is fixedly connected to the lower side surface of the middle part of the upper die cover plate 6;

[0114] The upper end of the guiding post 61 is fixedly connected to the lower side surface of the corner part of the upper die cover plate 6;

[0115] The lower die base 5 is formed with a guiding hole adapted to the guiding post 61;

[0116] The guiding post 61 is inserted into the guiding hole;

[0117] In step six, move the upper die cover plate 6 to insert the guiding post 61 into the guiding hole of the lower die base 5, so as to press down the holding post 4 sleeved with the housing 12, and make the two vertical fingers of the holding post 4 respectively insert between the steel ball push rod 3 and the rotor, and fasten the spiral spring 13 and the steel balls at both ends of it to keep them in the transverse round hole or transverse groove.

[0118] Preferably, the radial cross-section of the transverse groove is an arc greater than 180 0 arc. For example, the radial cross-section of the transverse groove is an arc of 210 0 ~330 0 arc.

[0119] Preferably, the axis of the transverse round hole or transverse groove is perpendicular to and intersects with the axis of the rotor 11.

[0120] Preferably, a concave pit 121 is formed on the side wall of the housing 12;

[0121] The diameter of the concave pit 121 is smaller than the diameter of the steel ball;

[0122] In Step 8, after pressing the outer shell 12 downwards and sleeving it on the rotor 11, the side wall of the housing 12 abuts against the steel balls at both ends of the helical spring 13 in the transverse round hole or transverse groove of the housing 12, causing the helical spring 13 to be compressed and deformed, and the rotor 11 can rotate relative to the housing 12; when the housing 12 and the rotor 11 rotate relative to each other and the transverse round hole or transverse groove corresponds to the pit 121, a part of the steel ball will be probed into the pit 121 by the compression deformation force of the helical spring 13, as Figure 3 shown, thereby generating vibration and / or sound, and providing a good user experience for the commutation product.

[0123] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An assembly tooling for a commutation product, the commutation product comprising a rotor (11) and a housing (12); the rotor (11) is cylindrical, and a transverse circular hole or a transverse groove with an upper-side opening is formed at the upper end thereof; characterized in that, The assembly tooling includes a lower die base (5), a rotor fixing block (1), a steel ball preloading blanking positioning block (2), a steel ball push rod (3), a retaining post (4) and a housing pressing block (7); The rotor fixing block (1) is fixedly arranged on the lower die base (5) and is used for placing and fixing the rotor (11) so that its horizontal circular hole or horizontal groove is in the left - right direction; The lower die base (5) is fixedly provided with left - right guide rails on both the left and right sides of the rotor fixing block (1); Two steel ball preloading blanking positioning blocks (2) are respectively arranged on the left - right guide rails on both the left and right sides of the rotor fixing block (1) and can slide along the left - right guide rails; The steel ball preloading blanking positioning block (2) is formed with a vertical feeding hole and a horizontal discharging hole; The lower end of the vertical feeding hole communicates with the horizontal discharging hole; A steel ball push rod (3) is inserted into the horizontal discharging hole of the steel ball preloading blanking positioning block (2) and is used for pushing the steel balls that fall to the lower end of the vertical feeding hole towards the end near the rotor fixing block (1) of the horizontal discharging hole, so that the steel balls enter the horizontal circular hole or horizontal groove of the rotor placed and fixed on the rotor fixing block (1); The retaining post (4) is arranged directly above the rotor fixing block (1) and can move up and down; The lower end of the retaining post (4) is formed with two vertical inserting fingers (41) arranged in a fork shape from left to right; R < W < R + 0.9r, where W is the distance between the two vertical inserting fingers (41), R is the outer diameter of the rotor (11), and r is the diameter of the horizontal circular hole or horizontal groove.

2. The commutation product assembly tooling according to claim 1, characterized in that, The housing pressing block (7) is sleeved on the retaining post (4) and can move up and down along the retaining post (4); When the housing (12) is sleeved on the retaining post (4) on the lower side of the housing pressing block (7), and the two vertical inserting fingers at the lower end of the retaining post (4) extend down to both sides of the rotor (11) placed and fixed on the rotor fixing block (1), press down the housing pressing block (7) to make the housing (12) move downward so that the housing (12) is sleeved outside the rotor (11).

3. The commutation product assembly tooling according to claim 2, characterized in that, The retaining post (4) is an elliptical cylinder or a prism; The side wall of the housing (12) encloses a circular ring adapted to the cylindrical rotor (11); The lower end of the housing (12) is open, and a hole adapted to the elliptical cylinder or prism is formed in the center of the upper end top plate.

4. The commutation product assembly tooling according to claim 2, characterized in that, The housing pressing block (7) is driven to move up and down by a cylinder; The steel ball preloading blanking positioning block (2) is driven to move left and right by a cylinder; The steel ball push rod (3) is driven to move left and right by a cylinder.

5. The commutation product assembly tooling according to claim 1, characterized in that, The upper part of the end of the steel ball push rod (3) near the rotor fixing block (1) is removed to form a stepped shape.

6. The commutation product assembly tooling according to claim 5, characterized in that, The left - right thickness of the vertical inserting finger (41) is less than the width of the step at the end of the steel ball push rod (3) near the rotor fixing block (1).

7. The commutation product assembly tooling according to claim 1, characterized in that the diameter of the lateral discharge hole of the steel ball preloading blanking positioning block (2) is the same as the diameter of the lateral round hole or lateral groove of the rotor (11).

8. The commutation product assembly tooling according to claim 1, characterized in that the commutation product assembly tooling further includes an upper die cover plate (6) and guide posts (61); the upper end of the holding post (4) is fixedly connected to the lower side surface of the middle part of the upper die cover plate (6); the upper end of the guide post (61) is fixedly connected to the lower side surface of the corner part of the upper die cover plate (6); the lower die base (5) is formed with guide holes adapted to the guide posts (61); the guide posts (61) are inserted into the guide holes.

9. The commutation product assembly tooling according to claim 8, characterized in that there are 2 guide posts (61) respectively fixedly connected to the lower side surfaces of the two corner parts of the upper die cover plate (6).

10. A method for assembling a commutation product using the commutation product assembly tooling according to any one of claims 1 to 7, characterized in that, Comprising the following steps: I. Horizontally load a helical spring (13) into the lateral round hole or lateral groove of the rotor (11) of the commutation product; II. Place and fix the rotor (11) with the helical spring (13) installed thereon onto the rotor fixing block (1), and make the lateral round hole or lateral groove of the rotor (11) be in the left - right direction; III. Move two steel ball preloading blanking positioning blocks (2) towards the rotor fixing block (1), so that the lateral discharge holes are close to and aligned with the lateral round hole or lateral groove of the rotor (11); IV. Add one steel ball to each of the vertical feeding holes of the two steel ball preloading blanking positioning blocks (2); V. Push the steel ball push rod (3) inserted into the lateral discharge hole of the steel ball preloading blanking positioning block (2) towards the rotor fixing block (1), and push the steel ball that has fallen to the lower end of the vertical feeding hole towards the end of the lateral discharge hole near the rotor fixing block (1), so as to pre - press the steel ball into the lateral round hole or lateral groove of the rotor (11) placed and fixed on the rotor fixing block (1); VI. Press down the holding post (4) sleeved with the housing (12), so that the two vertical insertion fingers (41) at the lower end of the holding post (4) respectively insert downward and contact the steel ball push rod (3), and fasten the steel balls at both ends of the helical spring (13) to keep them in the lateral round hole or lateral groove; VII. Move the steel ball push rod (3) and the steel ball preloading blanking positioning block (2) outward away from the rotor fixing block (1); VIII. Push down the housing pressing block (7) to press down and sleeve the housing (12) onto the rotor (11).

11. The method for assembling a commutation product according to claim 10, characterized in that the commutation product assembly tooling further includes an upper die cover plate (6) and guide posts (61); the upper end of the holding post (4) is fixedly connected to the lower side surface of the middle part of the upper die cover plate (6); the upper end of the guide post (61) is fixedly connected to the lower side surface of the corner part of the upper die cover plate (6); the lower die base (5) is formed with guide holes adapted to the guide posts (61); the guide posts (61) are inserted into the guide holes; In Step 6, move the upper die cover plate (6) to insert the guide post (61) downward into the guide hole of the lower die base (5), so as to press down the holding post (4) sleeved with the housing (12), and make the two vertical inserting fingers (41) of the holding post (4) respectively insert downward to contact the steel ball push rod (3), and fasten the steel balls at both ends of the spiral spring (13) to keep them in the horizontal round hole or horizontal groove.

12. The method for assembling a commutation product according to claim 10, wherein The radial cross-section of the transverse groove is greater than 180 0 arc; the axis of the horizontal round hole or horizontal groove intersects perpendicularly with the axis of the rotor (11).

13. The method for assembling a commutation product according to claim 10, wherein The radial cross-section of the transverse groove is an arc of 210 0 to 330 0 .

14. The method for assembling a commutation product according to claim 10, wherein a pit (121) is formed on the side wall of the housing (12); the diameter of the pit (121) is smaller than the diameter of the steel ball; In Step 8, after pressing down the housing (12) to sleeve it on the rotor (11), the side wall of the housing (12) abuts against the steel balls at both ends of the spiral spring (13) in the horizontal round hole or horizontal groove of the housing (12) to cause the spiral spring (13) to be compressed and deformed, and the rotor (11) can rotate relative to the housing (12); when the housing (12) and the rotor (11) rotate relative to each other and the horizontal round hole or horizontal groove corresponds to the pit (121), the compression deformation force of the spiral spring (13) will cause a part of the steel ball to penetrate into the pit (121).

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