Conductive slip ring fixing structure of electromagnetic chuck

Abstract

The utility model relates to a conductive slip ring fixing structure of an electromagnetic chuck, which comprises a shaft sleeve, a main shaft is connected in the shaft sleeve through a pivotal bearing assembly, an electromagnetic chuck is arranged at the upper end of the main shaft, a conductive slip ring rotor is arranged at the lower end of the main shaft, and a wire hole is formed in the middle of the main shaft. A connecting wire of the conductive slip ring rotor penetrates through the wire hole and is connected with the electromagnetic chuck; the lower end of the shaft sleeve is provided with a stator fixing assembly, and the stator fixing assembly is provided with a conductive slip ring stator which can be matched with the conductive slip ring rotor. The electromagnetic chuck is simple in structure, the purpose that the electromagnetic chuck and the conductive slip ring stator are arranged in a separated mode is achieved through the wire hole formed in the main shaft, a workpiece can be attracted to the electromagnetic chuck when the workpiece is small, and the problem that the conductive slip ring cannot be installed in the electromagnetic chuck when the minimum effective suction range of the electromagnetic chuck is close to the rotation center of the main shaft is solved; the conductive slip ring stator and the main shaft are connected through the key shaft, and the action is accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of vertical grinders and relates to a conductive slip ring fixing structure of an electromagnetic chuck. Background Art

[0002] The electromagnetic chuck of a grinding machine is a process equipment used for grinding. It uses electromagnetic force to adsorb the workpiece on the grinding machine table to achieve a stable processing process. The electromagnetic chuck is installed on the spindle of the lathe head and rotates with the spindle. In order to prevent the wires on the electromagnetic chuck from getting entangled due to rotation, a conductive slip ring must be installed. The conductive slip ring can realize the signal and power transmission between two relatively rotating mechanisms. Usually, the middle part of the electromagnetic chuck is a hollow structure, and the conductive slip ring is installed in the middle of the electromagnetic chuck. However, when the workpiece is small and the volume of the electromagnetic chuck is required to be small, the minimum effective suction range of the electromagnetic chuck is close to the center of rotation of the spindle, and the conductive slip ring can no longer be installed in the middle of the electromagnetic chuck. Summary of the invention

[0003] The utility model aims to overcome the deficiencies in the prior art, solve the problem that when the minimum effective suction range of the electromagnetic chuck is close to the main shaft rotation center, there is no position to install a conductive slip ring inside the electromagnetic chuck, and provide a conductive slip ring fixing structure of the electromagnetic chuck.

[0004] In order to achieve the above purpose, the following technical solutions are adopted:

[0005] The conductive slip ring fixing structure of the electromagnetic chuck comprises a shaft sleeve, a main shaft, an electromagnetic chuck, a conductive slip ring stator, a conductive slip ring rotor, a stator fixing assembly and a slewing bearing assembly, wherein the shaft sleeve is connected with the main shaft by means of the slewing bearing assembly, the upper end of the main shaft is provided with the electromagnetic chuck, the lower end of the main shaft is provided with the conductive slip ring rotor, a wire hole is provided in the middle of the main shaft, and the connecting wire of the conductive slip ring rotor passes through the wire hole and is connected to the electromagnetic chuck; the lower end of the shaft sleeve is provided with the stator fixing assembly, and the stator fixing assembly is provided with a conductive slip ring stator capable of matching with the conductive slip ring rotor;

[0006] The slewing bearing assembly comprises a first bearing group, a second bearing group, a first bearing end cover, a second bearing end cover and an isolating retaining ring; the upper section of the main shaft is provided with a fixed step, the fixed step is provided with the first bearing group, the lower end of the first bearing group is provided with an isolating retaining ring, and the lower end of the isolating retaining ring is provided with the second bearing group; the lower section of the main shaft is provided with a fixed boss, the fixed boss is provided with a second bearing end cover capable of matching with the second bearing group; the upper end of the sleeve is provided with a first bearing end cover capable of matching with the first bearing group;

[0007] The stator fixing assembly includes a connecting rod, a support plate and a connecting piece. The connecting rods are symmetrically arranged on the lower end surface of the sleeve, a support plate is arranged between the lower ends of the two connecting rods, and a connecting plate is arranged at the lower end of the conductive slip ring rotor. The connecting plate is connected to the support plate by a connecting piece.

[0008] Preferably, the first bearing group and the second bearing group are each composed of two angular contact ball bearings connected in series.

[0009] Preferably, a pulley bearing seat is provided at the lower end of the sleeve, and the outer side of the pulley bearing seat is connected to the pulley by means of a third bearing group; a connecting ring plate is provided at the outer side of the lower end of the main shaft, a connecting seat is provided on the lower end surface of the pulley, and a fixing pin is provided between the connecting seat and the connecting ring plate.

[0010] Preferably, the pulley bearing seat is provided with a first fixed convex ring capable of cooperating with the third bearing group, the pulley is provided with a second fixed convex ring capable of cooperating with the third bearing group, and the connecting seat is provided with an annular boss capable of cooperating with the third bearing group; the third bearing end cover is provided on the lower end surface of the pulley bearing seat.

[0011] Preferably, a keyway shaft is provided at the lower end of the main shaft, a key shaft is provided at the lower end of the keyway shaft, a lower end cover for fixing the conductive slip ring rotor is provided at the lower end of the key shaft; and a threading groove is provided at the upper end of the key shaft.

[0012] Preferably, a limit baffle capable of cooperating with the fixing pin is provided below the connecting ring plate.

[0013] Preferably, a positioning groove is provided at the bottom of the electromagnetic chuck, and a positioning platform capable of cooperating with the positioning groove is provided at the upper end of the main shaft; the electromagnetic chuck is connected to the main shaft by connecting bolts.

[0014] Preferably, a connecting flange is provided on the outer side of the upper end of the sleeve.

[0015] Preferably, a sealing ring is provided between the first bearing end cover and the main shaft.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The utility model has a simple structure and utilizes the wire hole opened inside the main shaft to realize the purpose of separately setting the electromagnetic chuck and the conductive slip ring stator. When the workpiece is small, it can also be adsorbed on the electromagnetic chuck, and the problem that when the minimum effective suction range of the electromagnetic chuck is close to the rotation center of the main shaft, there is no position to install the conductive slip ring inside the electromagnetic chuck. The conductive slip ring stator and the main shaft are connected by a key shaft, and the action is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a partial schematic diagram of the main shaft and electromagnetic chuck of the utility model.

[0020] Figure 3 It is a schematic diagram of the key shaft part of the utility model.

[0021] Figure 4 It is a schematic diagram of the structure of the conductive slip ring stator part of the utility model.

[0022] Figure 5 for Figure 1 Enlarged view of point A in .

[0023] In the figure: 1, sleeve; 2, main shaft; 3, electromagnetic chuck; 4, conductive slip ring stator; 5, conductive slip ring rotor; 6, wire hole; 7, connecting wire; 8, first bearing group; 9, second bearing group; 10, first bearing end cover; 11, second bearing end cover; 12, isolation ring; 13, fixed step; 14, fixed boss; 15, connecting rod; 16, support plate; 17, connecting piece; 18, connecting plate; 19, pulley bearing seat; 20, pulley; 21, connecting ring plate; 22, connecting seat; 23, fixing pin; 24, first fixing convex ring; 25, second fixing convex ring; 26, annular boss; 27, keyway shaft; 28, key shaft; 29, lower end cover; 30, threading groove; 31, limit baffle; 32, positioning groove; 33, positioning platform; 34, connecting flange; 35, sealing ring; 36, third bearing group; 37, third bearing end cover. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] like Figure 1-Figure 5 As shown, a conductive slip ring fixing structure of an electromagnetic chuck includes a sleeve 1, a main shaft 2, an electromagnetic chuck 3, a conductive slip ring stator 4, a conductive slip ring rotor 5, a stator fixing assembly and a slewing bearing assembly;

[0026] The shaft sleeve 1 is connected with a main shaft 2 by means of a slewing bearing assembly, and the main shaft 2 can rotate in the shaft sleeve 1 by means of the slewing bearing assembly;

[0027] An electromagnetic chuck 3 is provided at the upper end of the main shaft 2, and the electromagnetic chuck 3 can rotate together with the main shaft 2;

[0028] A conductive slip ring rotor 5 is provided at the lower end of the main shaft 2, a wire hole 6 is provided in the middle of the main shaft 2, and a connecting wire 7 of the conductive slip ring rotor 5 passes through the wire hole 6 and is connected to the electromagnetic chuck 3. The conductive slip ring rotor 5 is located at the lower end of the main shaft 2 and does not cause position interference with the electromagnetic chuck 3.

[0029] The lower end of the shaft sleeve 1 is provided with a stator fixing assembly, and the stator fixing assembly is provided with a conductive slip ring stator 4 that can cooperate with the conductive slip ring rotor 5;

[0030] The slewing bearing assembly includes a first bearing group 8, a second bearing group 9, a first bearing end cover 10, a second bearing end cover 11 and an isolating retaining ring 12. A fixed step 13 is provided on the upper section of the main shaft 2, and the first bearing group 8 is provided on the fixed step 13. The lower end of the first bearing group 8 is provided with an isolating retaining ring 12, and the lower end of the isolating retaining ring 12 is provided with the second bearing group 9;

[0031] The lower section of the main shaft 2 is provided with a fixed boss 14, and the fixed boss 14 is provided with a second bearing end cover 11 capable of matching with the second bearing group 9; the upper end of the sleeve 1 is provided with a first bearing end cover 10 capable of matching with the first bearing group 8, and the first bearing end cover 10, the second bearing end cover 11, the isolation retaining ring 12 and the fixed boss 14 form a match to fix the first bearing group 8 and the second bearing group 9 between the main shaft 2 and the sleeve 1, so that the main shaft 2 will not move axially;

[0032] The stator fixing assembly includes a connecting rod 15, a support plate 16 and a connecting piece 17. The connecting rods 15 are symmetrically arranged on the lower end surface of the sleeve 1, and a support plate 16 is arranged between the lower ends of the two connecting rods 15. A connecting plate 18 is arranged at the lower end of the conductive slip ring rotor 5. The connecting plate 18 is connected to the support plate 16 by the connecting piece 17. The support plate 16 provides an installation space for the conductive slip ring rotor 5.

[0033] Furthermore, the first bearing group 8 and the second bearing group 9 are both composed of two angular contact ball bearings connected in series.

[0034] Furthermore, a pulley bearing seat 19 is provided at the lower end of the shaft sleeve 1, and a pulley 20 is connected to the outer side of the pulley bearing seat 19 by means of a third bearing group 36, and the pulley 20 can rotate around the pulley bearing seat 19 by means of the third bearing group 36;

[0035] A connecting ring plate 21 is arranged on the outer side of the lower end of the main shaft 2, a connecting seat 22 is arranged on the lower end surface of the pulley 20, and a fixing pin 23 is arranged between the connecting seat 22 and the connecting ring plate 21. When the pulley 20 rotates, the fixing pin 23 drives the connecting ring plate 21 to rotate, and the main shaft 2 rotates accordingly;

[0036] The pulley 20 is connected to an external driving pulley by a transmission belt, thereby providing power to the main shaft 2 .

[0037] Furthermore, the pulley bearing seat 19 is provided with a first fixed convex ring 24 capable of cooperating with the third bearing group 36, the pulley 20 is provided with a second fixed convex ring 25 capable of cooperating with the third bearing group 36, and the connecting seat 22 is provided with an annular boss 26 capable of cooperating with the third bearing group 36; a third bearing end cover 37 is provided on the lower end surface of the pulley bearing seat 19; the third bearing seat 36 is fixed by utilizing the cooperation between the annular boss 26, the first fixed convex ring 24, the second fixed convex ring 25 and the third bearing end cover 37.

[0038] Further, a keyway shaft 27 is provided at the lower end of the main shaft 2, a keyway shaft 28 is provided at the lower end of the keyway shaft 27, a lower end cover 29 for fixing the conductive slip ring rotor 5 is provided at the lower end of the keyway shaft 28, and the lower end cover 29 cooperates with the keyway shaft 27 to fix the conductive slip ring rotor 5;

[0039] When the main shaft 2 rotates, the key shaft 28 is driven to rotate by the keyway shaft 27, and the conductive slip ring rotor 5 rotates accordingly; a threading groove 30 is provided at the upper end of the key shaft 28, and the key shaft 28 cooperates with the keyway shaft 27, so that the conductive wire of the conductive slip ring rotor 5 can enter the wire hole 6 of the main shaft 1 through the threading groove 30.

[0040] Furthermore, a limiting baffle 31 capable of cooperating with the fixing pin 23 is disposed below the connecting ring plate 21 , and the limiting baffle 31 prevents the fixing pin 23 from sliding out and falling.

[0041] Furthermore, a positioning groove 32 is provided at the bottom of the electromagnetic suction cup 3, and a positioning platform 33 that can cooperate with the positioning groove 32 is provided at the upper end of the main shaft 2. The positioning groove 32 and the positioning platform 33 enable the electromagnetic suction cup 3 to be quickly and accurately positioned on the main shaft 2, which is convenient for installation; the electromagnetic suction cup 3 is connected to the main shaft 2 by connecting bolts.

[0042] Furthermore, a connecting flange 34 is provided on the outer side of the upper end of the sleeve 1 , and the sleeve 1 is connected to the grinding machine by means of the connecting flange 34 .

[0043] Furthermore, a sealing ring 35 is provided between the first bearing end cover 10 and the main shaft 2 .

[0044] Working principle: When the utility model is in use, the sleeve 1 is installed on the machine body through the connecting flange 34, and the main shaft 2 is rotatably installed inside the sleeve 1 by using the slewing bearing assembly.

[0045] A pulley bearing seat 19 is provided at the lower end of the shaft sleeve 1. The outer side of the pulley bearing seat 19 is connected to a pulley 20 by means of a third bearing group 36. A connecting seat 22 is provided on the lower end surface of the pulley 20. When the pulley 20 rotates, the connecting ring plate 21 is driven to rotate by means of a fixing pin 23, and the main shaft 2 rotates accordingly. A conductive slip ring rotor 5 is installed at the lower end of the main shaft 2 by means of a keyway shaft 27, a key shaft 28 and a lower end cover 29. When the main shaft 2 rotates, the keyway shaft 27 is used to drive the key shaft 28 to rotate, and the conductive slip ring rotor 5 rotates accordingly to cooperate with the conductive slip ring stator 4.

[0046] By opening a wire hole 6 inside the main shaft 2, a connecting wire 7 of a conductive slip ring rotor 5 located at the lower end of the main shaft 2 can pass through the wire hole 6 to be connected to the electromagnetic chuck 3 located at the upper end of the main shaft 2, thereby realizing the separate arrangement of the electromagnetic chuck 3 and the conductive slip ring rotor 5, and solving the problem that there is no position to install the conductive slip ring inside the electromagnetic chuck when the minimum effective suction range of the electromagnetic chuck is close to the rotation center of the main shaft; and when the main shaft 2 rotates, the connecting wire 7 is inside the wire hole 6 and will not be entangled with external components.

[0047] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A conductive slip ring fixing structure of an electromagnetic chuck, comprising a shaft sleeve (1), a main shaft (2), an electromagnetic chuck (3), a conductive slip ring stator (4), a conductive slip ring rotor (5), a stator fixing assembly and a slewing bearing assembly, wherein: The shaft sleeve (1) is connected to a main shaft (2) by means of a slewing bearing assembly, an electromagnetic suction cup (3) is arranged at the upper end of the main shaft (2), a conductive slip ring rotor (5) is arranged at the lower end of the main shaft (2), a wire hole (6) is opened in the middle of the main shaft (2), and a connecting wire (7) of the conductive slip ring rotor (5) passes through the wire hole (6) and is connected to the electromagnetic suction cup (3); a stator fixing assembly is arranged at the lower end of the shaft sleeve (1), and a conductive slip ring stator (4) capable of matching with the conductive slip ring rotor (5) is arranged on the stator fixing assembly; The slewing bearing assembly comprises a first bearing group (8), a second bearing group (9), a first bearing end cover (10), a second bearing end cover (11) and an isolating retaining ring (12); the upper section of the main shaft (2) is provided with a fixing step (13), the fixing step (13) is provided with the first bearing group (8), the lower end of the first bearing group (8) is provided with an isolating retaining ring (12), and the lower end of the isolating retaining ring (12) is provided with the second bearing group (9); the lower section of the main shaft (2) is provided with a fixing boss (14), the fixing boss (14) is provided with a second bearing end cover (11) capable of matching with the second bearing group (9); the upper end of the shaft sleeve (1) is provided with the first bearing end cover (10) capable of matching with the first bearing group (8); The stator fixing assembly comprises a connecting rod (15), a support plate (16) and a connecting piece (17); the connecting rods (15) are symmetrically arranged on the lower end surface of the shaft sleeve (1); a support plate (16) is arranged between the lower ends of the two connecting rods (15); a connecting plate (18) is arranged at the lower end of the conductive slip ring rotor (5); and the connecting plate (18) is connected to the supporting plate (16) by means of the connecting piece (17).

2. The conductive slip ring fixing structure of an electromagnetic chuck according to claim 1, characterized in that: The first bearing group (8) and the second bearing group (9) are both composed of two angular contact ball bearings connected in series.

3. The conductive slip ring fixing structure of an electromagnetic chuck according to claim 1, characterized in that: A pulley bearing seat (19) is provided at the lower end of the shaft sleeve (1), and a pulley (20) is connected to the outer side of the pulley bearing seat (19) via a third bearing group (36); a connecting ring plate (21) is provided at the outer side of the lower end of the main shaft (2), a connecting seat (22) is provided on the lower end surface of the pulley (20), and a fixing pin (23) is provided between the connecting seat (22) and the connecting ring plate (21).

4. The conductive slip ring fixing structure of an electromagnetic chuck according to claim 3 is characterized in that: The pulley bearing seat (19) is provided with a first fixed convex ring (24) capable of cooperating with the third bearing group (36), the pulley (20) is provided with a second fixed convex ring (25) capable of cooperating with the third bearing group (36), and the connecting seat (22) is provided with an annular boss (26) capable of cooperating with the third bearing group (36); and a third bearing end cover (37) is provided on the lower end surface of the pulley bearing seat (19).

5. The conductive slip ring fixing structure of an electromagnetic chuck according to claim 1, characterized in that: The lower end of the main shaft (2) is provided with a keyway shaft (27), the lower end of the keyway shaft (27) is provided with a key shaft (28), the lower end of the key shaft (28) is provided with a lower end cover (29) for fixing the conductive slip ring rotor (5); the upper end of the key shaft (28) is provided with a threading groove (30).

6. The conductive slip ring fixing structure of an electromagnetic chuck according to claim 3, characterized in that: A limit baffle (31) capable of cooperating with the fixing pin (23) is provided below the connecting ring plate (21).

7. The conductive slip ring fixing structure of an electromagnetic chuck according to claim 1, characterized in that: A positioning groove (32) is provided at the bottom of the electromagnetic suction cup (3), and a positioning platform (33) capable of matching with the positioning groove (32) is provided at the upper end of the main shaft (2); the electromagnetic suction cup (3) is connected to the main shaft (2) by means of connecting bolts.

8. The conductive slip ring fixing structure of an electromagnetic chuck according to claim 1, characterized in that: A connecting flange (34) is provided on the outer side of the upper end of the shaft sleeve (1).

9. The conductive slip ring fixing structure of an electromagnetic chuck according to claim 1, characterized in that: A sealing ring (35) is provided between the first bearing end cover (10) and the main shaft (2).

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