Electric brush module of rotating table

Abstract

The invention relates to an electric brush module of a rotary table, which comprises a shell, an electric brush unit, a first propping unit and a second propping unit, and is characterized in that the electric brush unit comprises an electric brush body arranged in the shell, a conductive wire electrically connected with the electric brush body and a thrust for providing the electric brush body to move towards the notch direction of the shell; by means of the first jacking unit and the second jacking unit which are oppositely arranged on the shell, first jacking force and second jacking force which are opposite to each other are provided for the electric brush body so as to resist lateral thrust generated by friction between the electric brush body and a rotary table of the rotary table. The conditions of vibration, shaking, slipping, line contact and the like of the electric brush body caused by high-speed rotation of the rotating disc are greatly reduced, the annular side face of the rotating disc is prevented from being damaged, and good electric contact between the electric brush body and the rotating disc is kept.

Description

Technical Field

[0001] The invention relates to a rotary table in the form of electric discharge machining, and in particular to a brush module of the rotary table. Background Art

[0002] The rotary table in the form of electrical discharge machining is a type of machine that can run at high speed in liquid and is suitable for high-end electrical discharge, wire cutting, laser and other non-contact micro-machining equipment to produce precision parts for automobiles, semiconductors, medical and other fields.

[0003] The rotary table is mainly provided with a rotating disc and a brush module on the body, and the brush module is in electrical contact with the ring side of the rotating disc, so that the rotating disc remains conductive when rotating. However, the brush module is poorly designed, so that when the rotating disc rotates at high speed, the brush of the brush module will vibrate, shake, slip, or have line contact, thereby damaging the ring side of the rotating disc, resulting in the defect of poor conductivity of the rotating disc.

[0004] In addition, the design of electrical contact between the brush module and the conductor can refer to a carbon brush assembly and a motor with the carbon brush assembly disclosed in Chinese Patent Publication No. CN217720205U. However, the elastic damping assembly of the patent prior case is composed of a support spring and a damping member, and the elastic damping assembly is only arranged on one side of the carbon brush box and abuts against the single side of the carbon brush. This single damping direction design easily leads to excessive friction between the carbon brush and the carbon brush box, thereby damaging the carbon brush or causing the carbon brush and the carbon brush box to get stuck to each other. Also refer to a vacuum cleaner motor carbon brush assembly disclosed in Chinese Patent Publication No. CN215870142U. The patent prior case uses a bearing-like steel ball design surrounding the electrode. When the contact object runs at high speed and causes the brush to tilt, it is easy to cause the outer ring of the bearing sleeve and the sleeve to be squeezed, resulting in the defect of the steel ball being clamped and self-locked. Summary of the invention

[0005] The object of the present invention is to provide a brush module for a rotary table which can solve one of the above problems.

[0006] To achieve the above-mentioned purpose, the present invention is a brush module for a rotary table, comprising: a housing having a receiving groove, the receiving groove having a first groove wall surface, a second groove wall surface facing the first groove wall surface, a groove bottom surface arranged between the first groove wall surface and the second groove wall surface, and a notch facing the groove bottom surface; a brush unit, comprising a brush body, a conductive wire and an elastic body; the brush body is arranged in the receiving groove, and has a first side surface facing the first groove wall surface, a second side surface facing the second groove wall surface, an end surface facing the groove bottom surface, and a contact surface opposite to the end surface; the conductive wire is inserted into the housing; the An elastic body is sleeved on the conductive wire and abuts between the bottom surface of the slot and the end surface to provide a thrust for the brush body to move toward the slot; a first supporting unit is arranged on the housing and includes a first elastic element and a first supporting piece, the first supporting piece abuts against the first side surface of the brush body and provides a first supporting force from the first slot wall surface toward the second slot wall surface; and a second supporting unit is arranged on the housing and includes a second elastic element and a second supporting piece, the second supporting piece abuts against the second side surface of the brush body and provides a second supporting force from the second slot wall surface toward the first slot wall surface.

[0007] The utility model has the following effects: the first supporting unit and the second supporting unit are provided on the housing to provide the first supporting force and the second supporting force of the brush body, so as to resist the lateral thrust caused by the friction between the brush body and the turntable of the rotary table, greatly reduce the vibration, shaking, slipping, line contact and the like of the brush body caused by the high-speed rotation of the turntable, avoid damage to the ring side of the turntable, and maintain good electrical contact between the brush body and the turntable. In addition, the utility model also allows the brush body to have the function of automatically returning to the original center position, so as to avoid the problem that the brush body tilts and causes excessive friction between the brush body and the turntable, causing the motor of the rotary table to burn out.

[0008] Preferably, the rotary table has a machine platform and a turntable rotatably mounted on the machine platform and having a ring side surface; the housing is fixedly mounted on the machine platform, and the contact surface of the brush body is in electrical contact with the ring side surface of the turntable.

[0009] Preferably, the elastic body is a compression spring and has a first end abutting against the bottom surface of the groove and a second end abutting against the end surface.

[0010] Preferably, the first side surface of the brush body is concavely provided with a first limiting groove for the first sphere to abut against; the second side surface of the brush body is concavely provided with a second limiting groove for the second sphere to abut against.

[0011] Preferably, the cross-section of the first limiting groove is arc-shaped, the first top holding member is a sphere, and the radius of the first limiting groove is 2% larger than the radius of the first top holding member; the cross-section of the second limiting groove is arc-shaped, the second top holding member is a sphere, and the radius of the second limiting groove is 2% larger than the radius of the second top holding member.

[0012] Preferably, the first supporting unit further comprises a first body fixedly arranged in the shell, the first elastic element arranged in the first body, and the first supporting piece arranged in the first body and supported by the first elastic element, and the first supporting piece partially protrudes from the first body; the second supporting unit further comprises a second body fixedly arranged in the shell, the second elastic element arranged in the second body, and the second supporting piece arranged in the second body and supported by the second elastic element, and the second supporting piece partially protrudes from the second body.

[0013] Preferably, the spring constant of the elastic body is K1, the spring constants of the first elastic element and the second elastic element are K2, the compression of the elastic body is X1, the compression of the first elastic element and the second elastic element is X23, and the following condition is satisfied: K2 / K1=X1 / (20*X23).

[0014] Preferably, the brush body also has a third side surface connecting the first side surface and the second side surface, an assembly groove recessed by the end surface, and a filling hole penetrating the third side surface and communicating with the assembly groove. The conductive wire has a conductive segment electrically connected to the brush body, the conductive segment of the conductive wire is inserted into the assembly groove, and the filling hole, the assembly groove and the conductive segment are filled with conductive material.

[0015] Preferably, the assembly groove of the brush body is a threaded groove, the conductive section of the conductive wire is sleeved with a socket terminal, and the socket terminal is screwed in the assembly groove.

[0016] Preferably, the shell also has a third slot wall surface connected between the first slot wall surface and the second slot wall surface, and a fourth slot wall surface facing the third slot wall surface; the brush body also has a third side surface connected between the first side surface and the second side surface and facing the third slot wall surface, and a fourth side surface opposite to the third side surface; the brush module of the rotary worktable also has a third supporting unit and a fourth supporting unit; the third supporting unit is arranged on the shell and includes a third supporting member, the third supporting member presses against the third side surface of the brush body and provides a third supporting force from the third slot wall surface toward the fourth slot wall surface; the fourth supporting unit is arranged on the shell and includes a fourth supporting member, the fourth supporting member presses against the fourth side surface of the brush body and provides a fourth supporting force from the fourth slot wall surface toward the third slot wall surface.

[0017] Preferably, the third side surface of the brush body is recessed with a third limiting groove for the third sphere to abut against; the fourth side surface of the brush body is recessed with a fourth limiting groove for the fourth sphere to abut against.

[0018] Preferably, the cross-section of the third limiting groove is arc-shaped, and the radius of the third limiting groove is 2% larger than the radius of the third top holding member; the cross-section of the fourth limiting groove is arc-shaped, and the radius of the fourth limiting groove is 2% larger than the radius of the fourth top holding member.

[0019] Preferably, the third supporting unit further comprises a third body fixedly arranged in the shell, a third elastic element arranged in the third body, and a third supporting member arranged in the third body and supported by the third elastic element, and the third supporting member partially protrudes from the third body; the fourth supporting unit further comprises a fourth body fixedly arranged in the shell, a fourth elastic element arranged in the fourth body, and a fourth supporting member arranged in the fourth body and supported by the fourth elastic element, and the fourth supporting member partially protrudes from the fourth body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional assembly diagram of the first embodiment of the present invention, showing the state of the present invention being assembled on a rotary table;

[0021] Figure 2 yes Figure 1 Section view of line segment 2-2;

[0022] Figure 3 is a three-dimensional composite diagram of a first embodiment of the present invention;

[0023] Figure 4 is a perspective exploded view of a first embodiment of the present invention;

[0024] Figure 5A yes Figure 3 a cross-sectional view along line segment 5A-5A;

[0025] Figure 5B yes Figure 3 a cross-sectional view of line segment 5B-5B;

[0026] Fig. 6A is an exploded view of a second embodiment of the present invention, showing a state where the brush body and the conductive wire are separated;

[0027] Figure 6B is a combined diagram of a second embodiment of the present invention, showing a state where a brush body and a conductive wire are combined;

[0028] Figure 7 is a three-dimensional composite diagram of a third embodiment of the present invention;

[0029] Figure 8 yes Figure 7 a cross-sectional view of line segment 8-8; and

[0030] Fig. 9 10 ... rotary table

[0031] 11…Machine

[0032] 12…Turntable

[0033] 121…Ring side

[0034] 20…Housing

[0035] 20A…First shell

[0036] 20B…Second shell

[0037] 20C…Screw

[0038] 21…Receptacle

[0039] 211…First groove wall

[0040] 212…Second groove wall

[0041] 213…Slot bottom

[0042] 214…Notch

[0043] 215…First side hole

[0044] 216…Second side hole

[0045] 217…Piercing

[0046] 218 ... third groove wall surface 219 ... fourth groove wall surface A ... brush unit 30 ... brush body

[0047] 31…First side

[0048] 311…First limiting groove

[0049] 32…Second side

[0050] 321…Second limit groove

[0051] 33…End face

[0052] 34…Contact surface

[0053] 35…The third side

[0054] 351…The third limiting groove

[0055] 36…Assembly slot

[0056] 37…Packing hole

[0057] 38…The fourth side

[0058] 381…The fourth limiting groove

[0059] 40…conductive thread

[0060] 41…Insulation section

[0061] 42…Conductive segment

[0062] 43…Crimp terminal

[0063] 50…Elastomer

[0064] 51…first end

[0065] 52…Second end

[0066] 61…First supporting unit

[0067] 611…First body

[0068] 612…first elastic element

[0069] 613…First top holder

[0070] 6131…First column

[0071] 6132…First arc

[0072] 62…Second support unit

[0073] 621…Second Body

[0074] 622…second elastic element

[0075] 623…Second top holder

[0076] 6231…Second column

[0077] 6232…Second arc

[0078] 63…The third holding unit

[0079] 631…The Third Body

[0080] 632…third elastic element

[0081] 633…Third top holder

[0082] 64…Fourth holding unit

[0083] 641…The Fourth Body

[0084] 642…the fourth elastic element

[0085] 643…The fourth top holder

[0086] 100…Conductive material DETAILED DESCRIPTION

[0087] Before the present invention is described in detail, it should be noted that in the following description, similar components and parts are represented by the same reference numerals.

[0088] See also Figure 1 and Figure 2 As shown, the first embodiment of the present invention provides a brush module for a rotary table. The brush module is in two groups and is suitable for being assembled on the rotary table 10. The rotary table 10 has a machine table 11 and a turntable 12 rotatably mounted on the machine table 11 and having a ring side surface 121. The following only describes one group of the brush modules. Figure 3 and Figure 5B As shown, the brush module is mainly composed of a housing 20, a brush unit A, a first supporting unit 61, and a second supporting unit 62, wherein:

[0089] The housing 20 is fixed to the machine 11 and is formed by a first shell 20A and a second shell 20B locked by screws 20C. The housing 20 has a receiving groove 21. The receiving groove 21 has a first groove wall 211, a second groove wall 212 facing the first groove wall 211, a groove bottom 213 provided between the first groove wall 211 and the second groove wall 212, and a notch 214 facing the groove bottom 213. In this embodiment, the housing 20 also has a first side hole 215 penetrating the first groove wall 211, a second side hole 216 penetrating the second groove wall 212, and a through hole 217 penetrating the groove bottom 213.

[0090] The brush unit A includes a brush body 30 , a conductive wire 40 and an elastic body 50 .

[0091] The brush body 30 is arranged in the accommodating groove 21 of the housing 20 and does not contact the accommodating groove 21. The brush body 30 has a first side surface 31 facing the first groove wall surface 211, a second side surface 32 facing the second groove wall surface 212, an end surface 33 facing the groove bottom surface 213, and a contact surface 34 opposite to the end surface 33 and electrically contacting the annular side surface 121 of the turntable 12; in this embodiment, the first side surface 31 is recessed with a first limiting groove 311 extending along the long direction, and the second side surface 32 is recessed with a second limiting groove 321 extending along the long direction, and the cross-sections of the first limiting groove 311 and the second limiting groove 321 are arc-shaped.

[0092] The conductive wire 40 passes through the through hole 217 of the housing 20 and has an insulating section 41 located in the receiving groove 21 and a conductive section 42 passing through the insulating section 41 and electrically connected to the brush body 30 .

[0093] The elastic body 50 is sleeved on the insulating section 41 and abuts between the groove bottom surface 213 and the end surface 33 to provide a thrust for the brush body 30 to move toward the notch 214 so that the contact surface 34 of the brush body 30 maintains electrical contact with the annular side surface 121 of the turntable 12. In this embodiment, the elastic body 50 is a compression spring and has a first end 51 abutting against the groove bottom surface 213 and a second end 52 abutting against the end surface 33.

[0094] The first supporting unit 61 is disposed in the housing 20 and comprises a first body 611 fixed to the first side hole 215 of the housing 20, a first elastic element 612 disposed in the first body 611, and a first supporting member 613 disposed in the first body 611 and supported by the first elastic element 612. The first supporting member 613 partially protrudes from the first body 611 and abuts against the first limiting groove 311 of the first side surface 31 of the brush body 30. At the same time, the first supporting unit 61 provides a first supporting force from the first groove wall surface 211 to the second groove wall surface 212 to the brush body 30. The first elastic element 612 in this embodiment is a spring, but is not limited thereto, and may also be other materials with elastic restoring force.

[0095] The second supporting unit 62 is disposed in the housing 20 and comprises a second body 621 fixed to the second side hole 216 of the housing 20, a second elastic element 622 disposed in the second body 621, and a second supporting member 623 disposed in the second body 621 and supported by the second elastic element 622. The second supporting member 623 partially protrudes from the second body 621 and abuts against the second limiting groove 321 of the second side surface 32 of the brush body 30. Meanwhile, the second supporting unit 62 provides a second supporting force from the second groove wall surface 212 toward the first groove wall surface 211 to the brush body 30. The second elastic element 622 in the present embodiment is a spring, but is not limited thereto, and may also be other materials with elastic restoring force.

[0096] The above is the configuration description of each major component of the first embodiment of the present invention. The effect of the present invention is described as follows.

[0097] First, maintain good electrical contact between the brush body 30 and the turntable 12. Since the first supporting unit 61 and the second supporting unit 62 provided on the housing 20 of the present invention are respectively located on both sides of the brush body 30, the first supporting force and the second supporting force relative to the brush body 30 are provided, thereby resisting the lateral thrust generated by the friction between the brush body 30 and the turntable 12 of the rotary table 10, thereby greatly reducing the vibration, shaking, slipping, line contact, etc. of the brush body 30 caused by the turntable 12 when the high-speed rotation is performed, avoiding damage to the annular side surface 121 of the turntable 12, and maintaining good electrical contact between the brush body 30 and the turntable 12.

[0098] Second, the brush body 30 has the function of automatically returning to the original center position. Since the first side surface 31 and the second side surface 32 of the brush body 30 are respectively provided with a first limiting groove 311 and a second limiting groove 321 with an arc-shaped cross-section, and the first supporting member 613 of the first supporting unit 61 and the second supporting member 623 of the second supporting unit 62 are respectively supported on the first limiting groove 311 and the second limiting groove 321 with an arc-shaped cross-section, therefore, in addition to providing the first supporting force and the second supporting force relative to the brush body 30, the first supporting unit 61 and the second supporting unit 62, in addition to providing the first supporting force and the second supporting force relative to the brush body 30, through the mutual restriction of the first limiting groove 311 and the first supporting member 613, and the second limiting groove 621 and the second supporting member 623 with an arc-shaped cross-section, the brush body 30 has the function of automatically returning to the original center position, thereby preventing the brush body 30 from tipping over and causing excessive friction between the brush body 30 and the turntable 12, causing the motor (not shown in the figure) of the rotary table 10 to burn out. It can also avoid vibration, tipping, jamming and other problems between the housing 20, the first supporting unit 61, the second supporting unit 62 and the brush body 30, and can effectively reduce the friction between the brush body 30 and the turntable 12, thereby reducing the driving current of the rotary table 10 and achieving power saving.

[0099] It is worth mentioning that, in addition to the arc-shaped cross-section of the first limiting groove 311 of the brush body 30, the radius of the first limiting groove 311 is 2% larger than the radius of the first top holding member 613; in addition to the arc-shaped cross-section of the second limiting groove 321 of the brush body 30, the radius of the second limiting groove 321 is 2% larger than the radius of the second top holding member 623; thereby ensuring that the brush body 30 has the function of automatically returning to the original center position.

[0100] In addition, the spring constant of the elastic body 50 is K1, the spring constants of the first elastic element 612 and the second elastic element 622 are K2, the compression amount of the elastic body 50 is X1, the compression amount of the first elastic element 612 and the second elastic element 622 is X23, and the following condition is satisfied: K2 / K1=X1 / (20*X23); when the above condition is met, the amplitude of the left and right shaking of the brush body 30 caused by the turntable 12 when rotating at a high speed can be limited, thereby preventing the brush body 30 from colliding with the receiving groove 21 of the shell 30 due to excessive shaking amplitude.

[0101] See also Fig. 6A and Figure 6B As shown, the brush module of a rotary table provided in the second embodiment of the present invention is different from the first embodiment in that:

[0102] The brush body 30 further comprises a third side surface 35 connecting the first side surface 31 and the second side surface 32, an assembly groove 36 recessed by the end surface 33, and a filling hole 37 penetrating the third side surface 35 and communicating with the assembly groove 36. The conductive segment 42 of the conductive wire 40 is inserted into the assembly groove 36, and the filling hole 37, the assembly groove 36 and the conductive segment 42 are filled with a conductive material 100, such as tin, but not limited thereto. In the present embodiment, the assembly groove 36 of the brush body 30 is a threaded groove, and the conductive segment 42 of the conductive wire 40 is sleeved with a socket terminal 43, and the socket terminal 43 is screwed into the assembly groove 36.

[0103] Accordingly, when the conductive wire 40 and the brush body 30 are assembled with each other, the conductive material 100 can be pre-welded on the outer side of the toothed socket terminal 43, and then inserted or screwed into the assembly groove 36 of the brush body 30. Then, the conductive material 100 is taken out and heated to a molten state and flows into the assembly groove 36 from the filling hole 37 of the brush body 30, and melts with the conductive material 100 on the toothed socket terminal 43 of the conductive wire 40 and cools to form a whole, thereby completing the electrical connection between the conductive wire 40 and the brush body 30, thereby improving the tensile strength. When the brush body 30 needs to be replaced, a heating tool is taken to heat the conductive material 100 in the filling hole 37 of the brush body 30, and the conductive material 100 is molten. Then, the conductive wire 40 and the brush body 30 can be rotated and separated from each other, and the brush body 30 is replaced, so that the conductive wire 40 can be recycled and reused, achieving an environmentally friendly effect.

[0104] See also Figure 7 and Figure 8 As shown, the brush module of a rotary table provided in the third embodiment of the present invention is different from the first embodiment in that:

[0105] The housing 20 further includes a third slot wall surface 218 connecting the first slot wall surface 211 and the second slot wall surface 212 , and a fourth slot wall surface 219 facing the third slot wall surface 218 .

[0106] The brush body 30 further comprises a third side surface 35 connecting the first side surface 31 and the second side surface 32 and facing the third groove wall surface 218, and a fourth side surface 38 opposite to the third side surface 35. In this embodiment, the third side surface 35 is recessed with a third limiting groove 351, and the fourth side surface 38 is recessed with a fourth limiting groove 381.

[0107] The brush module of the rotary table 10 further includes a third supporting unit 63 and a fourth supporting unit 64 .

[0108] The third supporting unit 63 is disposed on the housing 20 and comprises a third body 631 fixed to the housing 20, a third elastic element 632 disposed in the third body 631, and a third supporting member 633 disposed in the third body 632 and supported by the third elastic element 632. The third supporting member 633 partially protrudes from the third body 631 and abuts against the third limiting groove 351 of the third side surface 35 of the brush body 30. Meanwhile, the third supporting unit 63 provides a third supporting force from the third groove wall surface 218 toward the fourth groove wall surface 219 to the brush body 30. The third elastic element 632 in this embodiment is a spring, but is not limited thereto and may also be other materials with elastic restoring force.

[0109] The fourth supporting unit 64 is disposed on the housing 20 and comprises a fourth body 641 fixed to the housing 20, a fourth elastic element 642 disposed in the fourth body 641, and a fourth supporting member 643 disposed in the fourth body 641 and supported by the fourth elastic element 642. The fourth supporting member 643 partially protrudes from the fourth body 641 and abuts against the fourth limiting groove 381 of the fourth side surface 38 of the brush body 30. At the same time, the fourth supporting unit 64 provides a fourth supporting force from the fourth groove wall surface 219 toward the third groove wall surface 218 to the brush body 30. The fourth elastic element 642 in this embodiment is a spring, but is not limited thereto, and may also be other materials with elastic restoring force.

[0110] Accordingly, by means of the design of the third supporting unit 63, the fourth supporting unit 64 in conjunction with the first supporting unit 61 and the second supporting unit 62, the front, rear, left and right directions of the brush body 30 are all supported by a supporting force, so that the automatic centering effect of the brush body 30 is better, and the vibration, shaking, slipping, line contact, tipping, jamming and other problems of the brush body caused by the turntable when rotating at high speed can be greatly reduced.

[0111] See also Fig. 9 As shown, the brush module of a rotary table provided in the fourth embodiment of the present invention is different from the first embodiment in that:

[0112] The first supporting member 613 of the first supporting unit 61 has a first column 6131 located in the first body 611 and supported by the first elastic element 612, and a first arc portion 6132 connected to the first column 6131, the surface of the first arc portion 6132 is arc-shaped and abuts against the first limiting groove 311 of the first side surface 31 of the brush body 30. The second supporting member 623 of the second supporting unit 62 has a second column 6231 located in the second body 621 and supported by the second elastic element 622, and a second arc portion 6232 connected to the second column 6231, the surface of the second arc portion 6232 is arc-shaped and abuts against the second limiting groove 321 of the second side surface 32 of the brush body 30. Another implementation state is thus formed.

Claims

1. A brush module for a rotary table, characterized in that: The brush module of the rotary table comprises: A housing having a receiving groove, wherein the receiving groove has a first groove wall surface, a second groove wall surface facing the first groove wall surface, a groove bottom surface provided between the first groove wall surface and the second groove wall surface, and a notch facing the groove bottom surface; A brush unit, comprising a brush body, a conductive wire and an elastic body; the brush body is arranged in the accommodating groove, and has a first side surface facing the first groove wall surface, a second side surface facing the second groove wall surface, an end surface facing the groove bottom surface, and a contact surface opposite to the end surface; the conductive wire is inserted into the housing; the elastic body is sleeved on the conductive wire and abuts between the groove bottom surface and the end surface to provide a thrust for the brush body to move toward the groove opening; a first supporting unit, disposed on the housing, and comprising a first elastic element and a first supporting member, wherein the first supporting member abuts against the first side surface of the brush body and provides a first supporting force from the first groove wall surface toward the second groove wall surface; and A second supporting unit is arranged on the housing and includes a second elastic element and a second supporting member. The second supporting member abuts against the second side surface of the brush body and provides a second supporting force from the second slot wall surface toward the first slot wall surface.

2. The brush module of the rotary table according to claim 1, characterized in that: The rotary workbench has a machine platform and a turntable rotatably arranged on the machine platform and having a ring side surface; the housing is fixedly arranged on the machine platform, and the contact surface of the brush body is in electrical contact with the ring side surface of the turntable.

3. The brush module of the rotary table according to claim 1, characterized in that: The elastic body is a compression spring and has a first end abutting against the bottom surface of the groove and a second end abutting against the end surface.

4. The brush module of the rotary table according to claim 1, characterized in that: The first side surface of the brush body is concavely provided with a first limiting groove for the first supporting member to abut against; the second side surface of the brush body is concavely provided with a second limiting groove for the second supporting member to abut against.

5. The brush module of the rotary table according to claim 4, characterized in that: The cross-section of the first limiting groove is arc-shaped, the first top holding member is a sphere, and the radius of the first limiting groove is 2% larger than the radius of the first top holding member; the cross-section of the second limiting groove is arc-shaped, the second top holding member is a sphere, and the radius of the second limiting groove is 2% larger than the radius of the second top holding member.

6. The brush module of the rotary table according to claim 1, characterized in that: The first supporting unit further comprises a first main body fixedly arranged in the shell, the first elastic element arranged in the first main body, and the first supporting piece arranged in the first main body and supported by the first elastic element, wherein the first supporting piece partially protrudes from the first main body; the second supporting unit further comprises a second main body fixedly arranged in the shell, the second elastic element arranged in the second main body, and the second supporting piece arranged in the second body and supported by the second elastic element, wherein the second supporting piece partially protrudes from the second main body.

7. The brush module of the rotary table according to claim 6, characterized in that: The spring constant of the elastic body is K1, the spring constant of the first elastic element and the second elastic element is K2, the compression amount of the elastic body is X1, the compression amount of the first elastic element and the second elastic element is X23, and the following condition is satisfied: K2 / K1=X1 / (20*X23).

8. The brush module of the rotary table according to claim 1, characterized in that: The brush body also has a third side surface connecting the first side surface and the second side surface, an assembly groove recessed by the end surface, and a filling hole penetrating the third side surface and communicating with the assembly groove. The conductive wire has a conductive segment electrically connected to the brush body. The conductive segment of the conductive wire is inserted into the assembly groove, and the filling hole, the assembly groove and the conductive segment are filled with conductive material.

9. The brush module of the rotary table according to claim 8, characterized in that: The assembly groove of the brush body is a threaded groove, and the conductive section of the conductive wire is sleeved with a socket terminal, which is screwed in the assembly groove.

10. The brush module of the rotary table according to claim 1, characterized in that: The shell also has a third slot wall surface connected between the first slot wall surface and the second slot wall surface, and a fourth slot wall surface facing the third slot wall surface; the brush body also has a third side surface connected between the first side surface and the second side surface and facing the third slot wall surface, and a fourth side surface opposite to the third side surface; the brush module of the rotary worktable also has a third supporting unit and a fourth supporting unit; the third supporting unit is arranged on the shell and includes a third supporting member, the third supporting member presses against the third side surface of the brush body and provides a third supporting force from the third slot wall surface toward the fourth slot wall surface; the fourth supporting unit is arranged on the shell and includes a fourth supporting member, the fourth supporting member presses against the fourth side surface of the brush body and provides a fourth supporting force from the fourth slot wall surface toward the third slot wall surface.

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