CN115284024A

CN115284024A - Auxiliary supporting structure of rotary table

Info

Publication number: CN115284024A
Application number: CN202210917025.2A
Authority: CN
Inventors: 庞建军; 项久鹏; 王增新; 薛向荣; 屈宝国
Original assignee: Super Synchronization Co ltd
Current assignee: Super Synchronization Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-11-04
Anticipated expiration: 2042-08-01
Also published as: CN115284024B

Abstract

The application relates to an auxiliary supporting structure of a rotary table, which comprises a supporting seat, an auxiliary bearing and a connecting rotating shaft; the supporting seat is provided with a bearing mounting hole, the auxiliary bearing is coaxially mounted in the bearing mounting hole of the supporting seat, the hole wall of the bearing mounting hole is provided with a bearing mounting surface for mounting the auxiliary bearing, and one end of the connecting rotating shaft is inserted into the bearing mounting hole and is coaxially connected with the auxiliary bearing. This application is through processing out the bearing installation face of installation auxiliary bearing at the pore wall of bearing mounting hole for auxiliary bearing can install on the supporting seat under the prerequisite not with the help of the bearing frame, has left out the step of installing the bearing frame and has saved the installation space of bearing frame, has reduced whole auxiliary stay structure's height, has shortened the distance between auxiliary stay structure and the revolving stage, and then the staff of being convenient for carries the work piece toward the revolving stage on, reduces staff's the operation degree of difficulty.

Description

Auxiliary supporting structure of rotary table

Technical Field

The application relates to the field of general equipment manufacturing, in particular to an auxiliary supporting structure of a rotary table.

Background

The cradle type five-axis turntable is used as irregular complex part machining equipment and is widely used due to high flexibility and flexible angle. As shown in fig. 1, the cradle type five-axis turret includes a boom 100, a swing 101, a turret 102, and an auxiliary support structure 1. The cantilever part 100 is connected with one end of the swing part 101 and used for driving the swing part 101 to drive the rotary table 102 to swing on a vertical surface in a reciprocating mode, and the rotary table 102 rotates on the swing part 101 along the axis of the rotary table so as to carry out multi-angle continuous machining on the complex part. The auxiliary supporting structure 1 is rotatably connected with one end of the swinging part 101 opposite to the cantilever part 100 so as to balance the whole, so that the swinging part 101 can swing between the cantilever part 100 and the auxiliary supporting structure 1 like a cradle, and the supporting stability of the swinging part 101 is improved.

Referring to fig. 2, the present auxiliary supporting structure 1 mainly includes a supporting seat 2, a connecting rotating shaft 4, a bearing seat 103, a bearing and a sealing member. Bearing frame 103 is fixed inside supporting seat 2, and the bearing is installed on bearing frame 103, connects 4 one ends of pivot and sways a 101 fixed connection, and the other end of connecting pivot 4 is connected with the bearing in inserting the bearing coaxially for connect pivot 4 can rotate in supporting seat 2 when swaying along with swaying a 101.

When a workpiece is machined, a worker needs to stride over the auxiliary supporting structure 1 to place the workpiece on the rotary table 102, but the conventional auxiliary supporting structure 1 is far higher than the rotary table 102, so that the worker is blocked when carrying and additionally installing the workpiece on the rotary table 102, and the operation difficulty of the worker is increased.

Disclosure of Invention

In order to facilitate the staff to transport the work piece on the revolving stage, reduce staff's the operation degree of difficulty, this application provides a revolving stage auxiliary stay structure.

The application provides a revolving stage auxiliary stay structure adopts following technical scheme:

an auxiliary supporting structure of a rotary table comprises a supporting seat, an auxiliary bearing and a connecting rotating shaft;

the supporting seat is provided with a bearing mounting hole, the auxiliary bearing is coaxially mounted in the bearing mounting hole of the supporting seat, the hole wall of the bearing mounting hole is provided with a bearing mounting surface for mounting the auxiliary bearing, and one end of the connecting rotating shaft is inserted into the bearing mounting hole and is coaxially connected with the auxiliary bearing.

Through adopting above-mentioned technical scheme, the one end of connecting the pivot is connected with the swing piece of five revolving stages of cradle formula, and the other end inserts in the bearing mounting hole and is connected with auxiliary bearing for when connecting the pivot and rotating along self axis direction along with swing the piece, auxiliary stay structure can support connecting the pivot. The bearing mounting surface for mounting the auxiliary bearing is processed through the hole wall of the bearing mounting hole directly on the auxiliary supporting structure, so that the auxiliary bearing can be mounted on the supporting seat without the help of a bearing seat, the step of mounting the bearing seat is omitted, the mounting space of the bearing seat is saved, the height of the whole auxiliary supporting structure is reduced, the distance between the auxiliary supporting structure and the rotary table is shortened, and then a worker can carry a workpiece on the rotary table conveniently, and the operation difficulty of the worker is reduced.

Preferably, one end of the auxiliary bearing, which is close to the connecting rotating shaft, is abutted with a limiting ring strip, and a limiting ring groove for installing the limiting ring strip is coaxially formed in the hole wall of the bearing installing hole.

Through adopting above-mentioned technical scheme, during the installation auxiliary bearing, in order to avoid auxiliary bearing to break away from the supporting seat from the drill way department of bearing mounting hole as far as possible, spacing ring strip is located auxiliary bearing and is close to the one end of connecting the pivot so that carry on spacingly to auxiliary bearing, improves the connection stability of auxiliary bearing and supporting seat.

Preferably, one end of the auxiliary bearing, which deviates from the connecting rotating shaft, is abutted with a limiting blocking ring, and the limiting blocking ring is coaxially installed on the hole wall of the bearing installation hole.

Through adopting above-mentioned technical scheme, in order to reduce auxiliary bearing and rock the range in the bearing mounting hole, improve auxiliary bearing and be connected the stability of being connected between the pivot, spacing fender ring deviates from the one end butt of being connected the pivot with auxiliary bearing, keeps off the effect that the ring realization moved and carries out common restriction to auxiliary bearing along self axis direction through spacing ring strip and spacing.

Preferably, connect the pivot including fixed first shaft section, second shaft section and the third shaft section of coaxial coupling in proper order, first shaft section with auxiliary bearing coaxial coupling, the second shaft section is located between supporting seat and the swing piece, the third shaft section is connected with the swing piece, the top side of second shaft section seted up with the plane of falling the height that the top of supporting seat flushed.

Through adopting above-mentioned technical scheme, the connecting rotating shaft among the prior art is all designed into the echelonment major axis that the cross-section is circular for the convenience of processing, can make the top side of connecting the rotating shaft highly higher apart from the revolving stage up end like this, is unfavorable for the staff to stride across connecting the rotating shaft and carries the work piece.

The connecting rotating shaft is a long shaft fixedly connected with the first shaft section, the second shaft section and the third shaft section, wherein a height reducing plane is arranged on the top side of the second shaft section between the supporting seat and the swinging piece, so that on one hand, the height of the whole auxiliary supporting structure is convenient to reduce again, the distance between the top of the auxiliary supporting structure and the turntable is further shortened, and the workpiece is convenient to carry by a worker; on the other hand because connect the pivot more downwards the atress big more, the planar seting up of falling the height not only reduces the focus of second shaft section department under the prerequisite of guaranteeing the whole stress intensity of connecting the pivot for the radial cross-section of whole second shaft section is asymmetric non-circular cross-section from top to bottom, when whole connection pivot stall, makes the connection pivot tend to steady state more easily through falling the height plane, reduces the range of rocking of piece.

Preferably, a sealing assembly is arranged between the supporting seat and the second shaft section, and the sealing assembly is used for reducing the height of the supporting seat as much as possible while sealing the bearing mounting hole;

the seal assembly includes a labyrinth seal and a rotary seal located on a side of the labyrinth seal proximate the bearing mounting bore.

Through adopting above-mentioned technical scheme, in order to reduce impurity entering bearing mounting hole in with the auxiliary bearing contact, reduce the probability of auxiliary bearing damage, improve auxiliary bearing's life. Sealing structure among the prior art is mostly labyrinth seal, is exactly the echelonment of zigzag shape is sealed, and in order to reach sealed effect, labyrinth seal is provided with 3 at least, nevertheless can increase the whole height of supporting seat like this on the one hand to in processing labyrinth seal, on the other hand increases the processing degree of difficulty to auxiliary stay structure, and labyrinth seal's structure is complicated more, and the processing degree of difficulty is big more.

Therefore, this application is for the whole height that further reduces the supporting seat, further dwindles supporting seat top and labyrinth seal's quantity promptly, chooses for use 1 way labyrinth seal and 1 way mode that rotatory sealing member combined together to reach sealed effect. Compare 3 at least labyrinth seals, 1 labyrinth seal can further reduce whole auxiliary stay structure's height, strengthens the leakproofness between second shaft section and the supporting seat through rotary seal spare to reduce impurity as far as and get into in the bearing mounting hole and contact with auxiliary bearing, reach sealed effect and reduced the height of supporting seat simultaneously.

Preferably, the labyrinth seal comprises a sealing baffle ring, the sealing baffle ring is fixed on the second shaft section and is coaxially arranged with the first shaft section, and the supporting seat is provided with a sealing baffle groove for the sealing baffle ring to be coaxially inserted and rotated.

Through adopting above-mentioned technical scheme, when connecting the pivot and inserting the bearing mounting hole and be connected with auxiliary bearing, sealed fender ring inserts and seals and keep off the inslot and form 1 labyrinth and seal to reduce the quantity that external impurity got into the bearing mounting hole.

Preferably, the rotary sealing element is a rotary sealing ring, a rotary ring groove which is coaxially arranged with the bearing mounting hole is formed in the supporting seat, and the rotary sealing ring is located in the rotary ring groove and abuts against the supporting seat and the second shaft section.

Through adopting above-mentioned technical scheme, when connecting pivot and auxiliary bearing and being connected, rotary seal supports the tank bottom of tight installation swivel and sealed fender groove to block the impurity that passes labyrinth seal, in order to further block impurity entering bearing mounting hole, seal bearing mounting hole department through rotary seal and labyrinth structure together.

Preferably, the supporting seat comprises a mounting base and a connecting seat which are detachably connected, the connecting seat is located on the mounting base, and the bearing mounting hole is formed in the connecting seat.

Through adopting above-mentioned technical scheme, wholly carry out the split with the supporting seat, the bearing installation face of being convenient for process on the one hand reduces the processing degree of difficulty, and on the other hand is convenient for install, at first installs the installation base, secondly installation auxiliary bearing in the connecting seat and with be connected the pivot, fix the connecting seat on the installation base at last, only need adjust the position of connecting seat when adjustment supporting seat and auxiliary bearing's position to in workman's installation auxiliary stay structure, reduce the installation degree of difficulty.

Preferably, the auxiliary bearing is a unilateral needle bearing.

By adopting the technical scheme, the prior art generally adopts a double-side roller bearing. This application adopts unilateral bearing, compares bilateral ball bearing and can make the thickness of supporting seat littleer under the condition of guaranteeing working property to further reduce auxiliary stay structure's whole height again.

Preferably, one side that the supporting seat deviates from the bearing mounting hole seted up with the back access hole of the coaxial intercommunication of bearing mounting hole, can dismantle on the supporting seat and be connected with and be used for the lid to close the sealed back lid of back access hole department, sealed back lid with be provided with the back sealing ring between the supporting seat, the back sealing ring supports tightly sealed back lid with the supporting seat.

By adopting the technical scheme, after the auxiliary supporting structure is connected with the swinging piece, the joint of the connecting rotating shaft and the supporting seat needs to be overhauled at regular time. Through sealed back lid, the staff can observe and overhaul the interior circumstances of bearing installation hole at any time under the prerequisite of not dismantling auxiliary stay structure and rocking the piece to improve staff's the maintenance degree of difficulty, seal sealed back lid and back access hole through the back seal ring, in order to reduce external impurity as far as possible and get into the bearing installation hole, thereby protect auxiliary bearing.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the bearing mounting surface for mounting the auxiliary bearing is processed on the hole wall of the bearing mounting hole, so that the auxiliary bearing can be mounted on the supporting seat without the help of a bearing seat, the step of mounting the bearing seat is omitted, the mounting space of the bearing seat is saved, the height of the whole auxiliary supporting structure is reduced, the distance between the auxiliary supporting structure and the rotary table is shortened, further, a worker can conveniently carry a workpiece on the rotary table, and the operation difficulty of the worker is reduced;

2. the top side of the second shaft section is provided with a height reducing plane, so that the height of the whole auxiliary supporting structure is reduced again, the distance between the top of the auxiliary supporting structure and the rotary table is shortened again, and workers can carry workpieces conveniently;

3. compare 3 at least labyrinth seals, 1 labyrinth seal can further reduce whole auxiliary stay structure's height, strengthens the leakproofness between second shaft section and the supporting seat through rotary seal to reduce impurity as far as and get into in the bearing mounting hole and contact with auxiliary bearing, reach sealed effect and reduced the height of supporting seat simultaneously.

Drawings

Fig. 1 is a schematic overall structure diagram of a cradle type five-axis turntable in the background art.

Fig. 2 is a schematic view of the internal structure of the auxiliary support structure in the related art.

Fig. 3 is a schematic view of the connection between the auxiliary support structure and the rocking member in the embodiment of the present application.

Fig. 4 is an exploded view of an auxiliary support structure in an embodiment of the present application.

Fig. 5 is a schematic view of the internal structure of the connection socket in the embodiment of the present application.

Fig. 6 is a schematic view of the internal connection of the auxiliary support structure in the embodiment of the present application.

In the figure: 1. an auxiliary support structure; 2. a supporting base; 21. installing a base; 22. a connecting seat; 23. a bearing mounting hole; 24. a bearing mounting surface; 25. a limiting ring groove; 26. sealing the baffle groove; 27. a rotating ring groove; 28. a rear manhole; 3. an auxiliary bearing; 4. connecting the rotating shaft; 41. a first shaft section; 42. a second shaft section; 421. lowering the plane; 43. a third shaft section; 5. a limiting ring strip; 6. a limit stop ring; 7. a seal assembly; 71. a labyrinth seal; 711. a sealing baffle ring; 72. a rotary seal; 721. rotating the sealing ring; 8. sealing the rear cover; 9. a rear sealing ring; 100. a cantilever member; 101. a rocking member; 102. a turntable; 103. and a bearing seat.

Detailed Description

The present application is described in further detail below with reference to figures 2-6.

The embodiment of the application discloses revolving stage auxiliary stay structure. Referring to fig. 3 and 4, the auxiliary support structure 1 includes a support base 2, an auxiliary bearing 3, a connecting rotation shaft 4, and a sealing assembly 7.

A bearing mounting hole 23 is horizontally arranged on the support base 2, the auxiliary bearing 3 is coaxially mounted in the bearing mounting hole 23 of the support base 2, and as shown in fig. 5, a bearing mounting surface 24 for mounting the auxiliary bearing 3 is arranged on the hole wall of the bearing mounting hole 23. The connecting shaft 4 includes a first shaft section 41, a second shaft section 42 and a third shaft section 43 fixedly connected in sequence. The first shaft section 41 is inserted into the bearing mounting hole 23 and is coaxially connected with the auxiliary bearing 3, the second shaft section 42 is positioned between the supporting seat 2 and the swinging piece 101, and the third shaft section 43 is used for being connected with the swinging piece 101, so that the auxiliary supporting structure 1 is connected with the cradle type five-axis turntable. The sealing assembly 7 is located between the second shaft section 42 and the supporting seat 2 and used for sealing the bearing mounting hole 23, so that impurities are prevented from entering the bearing mounting hole 23 to be in contact with the auxiliary bearing 3 as far as possible, the probability of damage to the auxiliary bearing 3 is reduced, and the service life of the auxiliary bearing 3 is prolonged.

For the mode that adopts earlier installation bearing frame 103 to install auxiliary bearing 3 again among the prior art as shown in fig. 2, this application is processed into the bearing installation face 24 of the installation bearing of being convenient for with one section pore wall of bearing mounting hole 23, thereby make auxiliary bearing 3 install on supporting seat 2 under the prerequisite with the help of bearing frame 103 not, thereby the installation space of bearing frame 103 has been saved, and then whole auxiliary stay structure 1's height has been reduced, the distance between auxiliary stay structure 1 top and the revolving stage 102 has been shortened, be convenient for the staff to carry the work piece toward revolving stage 102, reduce staff's the operation degree of difficulty.

Referring to fig. 4, since the requirement of flatness and machining precision is required for machining the bearing mounting surface 24, and the overall size of the support seat 2 is large, so that the machining difficulty is high, the support seat 2 is divided into two parts, namely, the mounting base 21 and the connecting seat 22, in order to facilitate machining the bearing mounting surface 24.

Wherein connecting seat 22 is located installation base 21 top, realizes connecting seat 22 and installation base 21's detachable connection through the bolt. The bearing mounting hole 23 is opened on the connection seat 22, thereby facilitating the processing of the bearing mounting hole 23. When installing the supporting seat 2, firstly install the installation base 21, secondly place connecting seat 22 and slide so that adjustment connecting seat 22 and the angle of connection of connecting pivot 4 on installation base 21, after accomplishing the installation of connecting seat 22 and connecting pivot 4, fix connecting seat 22 on installation base 21 again at last to be convenient for supporting seat 2 and the connection of connecting pivot 4.

Double-sided roller bearings are commonly used in the prior art. Adopt unilateral bearing when this application has cancelled bearing frame 103, compare bilateral ball bearing and can make the thickness of supporting seat 2 littleer under the condition of guaranteeing working property to further reduce auxiliary stay structure 1's whole height again.

Referring to fig. 4, a height-reducing plane 421 flush with the top end of the supporting seat 2 is formed on the top side of the second shaft section 42, so that on one hand, the height of the whole auxiliary supporting structure 1 is further reduced, and thus the distance between the top of the auxiliary supporting structure 1 and the turntable 102 is shortened again, so that a worker can carry a workpiece conveniently; on the other hand, the radial section of the second shaft section 42 is a non-circular section which is asymmetric from top to bottom, the connection rotating shaft 4 is stressed more downwards, the height reducing plane 421 is arranged on the premise of ensuring the overall stress strength of the connection rotating shaft 4, the gravity center of the second shaft section 42 is also reduced, and when the whole connection rotating shaft 4 stops rotating, the connection rotating shaft 4 is enabled to be in a more rapid and stable state through the height reducing plane 421, so that the shaking time of the swinging piece 101 is shortened.

Referring to fig. 5 and 6, the auxiliary bearing 3 is mounted in the bearing mounting hole 23, and the outer circumferential wall of the auxiliary bearing 3 abuts against the bearing mounting surface 24 to restrict radial movement of the auxiliary bearing 3. In order to limit the axial movement of the auxiliary bearing 3, so as to reduce the separation of the auxiliary bearing 3 from the bearing mounting hole 23 and improve the connection stability of the auxiliary bearing 3 and the support seat 2, as shown in fig. 6, one end of the auxiliary bearing 3 close to the second shaft section 42 is abutted with a limit ring strip 5, one end of the auxiliary bearing 3 away from the second shaft section 42 is abutted with a limit stop ring 6, and the limit ring strip 5 and the limit stop ring 6 are both connected with the hole wall of the bearing mounting hole 23, so as to realize the axial limit of the auxiliary bearing 3.

Wherein, the hole wall of the bearing mounting hole 23 is provided with a limit ring groove 25 for mounting the limit ring strip 5, and the limit ring groove 25 and the bearing mounting hole 23 are coaxially arranged. After the auxiliary bearing 3 is installed, the limit ring strip 5 is installed, so that the peripheral wall of the limit ring strip 5 is abutted to the auxiliary bearing 3, and the auxiliary bearing 3 is blocked to move in the direction close to the second shaft section 42 to the maximum extent.

In addition, the limiting blocking ring 6 is coaxially fixed on the hole wall of the bearing mounting hole 23, when the auxiliary bearing 3 is mounted, the auxiliary bearing 3 moves along the direction close to the limiting blocking ring 6 until the auxiliary bearing abuts against the end face of the limiting blocking ring 6, the limiting blocking ring 6 and the whole connecting seat 22 are unified into a whole, so that the connecting strength between the connecting seat 22 and the limiting blocking ring 6 is improved, and the processing difficulty of the connecting seat 22 is reduced.

As shown in fig. 2, most of the prior art sealing elements are labyrinth seals, that is, zigzag-shaped stepped seals, and in order to achieve the sealing effect, at least 3 labyrinth pieces are provided. On the one hand, the overall height of the supporting seat 2 is increased for facilitating the processing of the labyrinth seal; on the other hand, the more complicated the labyrinth seal structure is, the greater the processing difficulty is, so that the processing difficulty of the auxiliary support structure 1 is increased.

Therefore, to further reduce the distance between the top of the support base 2 and the turntable 102. Referring to fig. 4 and 5, the seal assembly 7 in the present application includes 1 labyrinth seal 71 and 1 rotary seal 72. The 1-way labyrinth seal 71 can further reduce the height of the overall auxiliary support structure 1. The 1-way rotary seal 72 and the 1-way labyrinth seal 71 are combined to ensure the sealing quality of the seal assembly 7.

In order to maximize the utilization of the rotary seal 72 and the labyrinth seal 71, the rotary seal 72 is located on the side of the labyrinth seal 71 close to the bearing mounting hole 23. The foreign substances are primarily blocked by the labyrinth seal 71, and a small amount of the foreign substances passing through the labyrinth seal 71 are finally blocked by the rotary seal 72.

As shown in fig. 5 and 6, the labyrinth seal 71 includes a sealing stopper ring 711 fixed on the end surface of the second shaft section 42 facing the support seat 2, a sealing stopper groove 26 for the sealing stopper ring 711 to be inserted and rotatably connected is formed on the support seat 2, and the sealing stopper groove 26 is coaxially arranged with the bearing mounting hole 23, so as to seal the periphery of the bearing mounting hole 23.

In addition, as shown in fig. 5 and fig. 6, the rotary sealing element 72 is a rotary sealing ring 721, the supporting seat 2 is provided with a rotary ring groove 27 coaxially arranged with the bearing mounting hole 23, the rotary sealing ring 721 is located in the rotary ring groove 27, and the rotary sealing ring 721 is abutted against the supporting seat 2 and the second shaft section 42, so as to reduce the gap between the supporting seat 2, the rotary sealing ring 721 and the second shaft section 42 as much as possible and reduce the probability of impurities entering the bearing mounting hole 23.

After supplementary bearing structure 1 is connected with rocking piece 101, need regularly overhaul the maintenance to the junction of connecting pivot 4 and supporting seat 2, refer to fig. 5 and fig. 6, back access hole 28 has been seted up to one side that supporting seat 2 deviates from bearing mounting hole 23, and back access hole 28 and the coaxial intercommunication of bearing mounting hole 23 to the staff overhauls under the prerequisite of not dismantling connecting pivot 4 and supporting seat 2.

In order to seal back access hole 28, in order to reduce impurity entering bearing mounting hole 23, back access hole 28 department lid has sealed back lid 8, sealed back lid 8 and supporting seat 2 bolted connection, be provided with back sealing ring 9 between sealed back lid 8 and the supporting seat 2, back sealing ring 9 is laid with back access hole 28 is coaxial and is supported tight supporting seat 2 and sealed back lid 8, in order to reduce the probability that impurity got into back access hole 28, realize the sealed to bearing mounting hole 23.

The implementation principle of the auxiliary supporting structure of the turntable in the embodiment of the application is as follows: when the auxiliary supporting structure 1 of the turntable 102 is installed, firstly, the installation base 21 is installed, secondly, the auxiliary bearing 3, the limiting ring strip 5 and the rotary sealing ring 721 are sequentially placed in the bearing installation hole 23, then, the connecting base 22 is placed on the installation base 21 and is connected with the connecting rotating shaft 4 until the first shaft section 41 is connected with the auxiliary bearing 3 and the rotary sealing ring 721 abuts against the second shaft section 42, secondly, the connecting base 22 is connected with the installation base 21 through bolts, and finally, the sealed rear cover 8 is installed on the supporting base 2, so that the height of the whole auxiliary supporting structure 1 is finally reduced, the distance between the auxiliary supporting structure 1 and the turntable 102 is shortened, a worker can conveniently carry workpieces to the turntable 102, and the operation difficulty of the worker is reduced.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a revolving stage auxiliary stay structure which characterized in that: comprises a supporting seat (2), an auxiliary bearing (3) and a connecting rotating shaft (4);

bearing mounting hole (23) have been seted up on supporting seat (2), auxiliary bearing (3) coaxial arrangement be in bearing mounting hole (23) of supporting seat (2), the pore wall of bearing mounting hole (23) is seted up and is used for the installation bearing installation face (24) of auxiliary bearing (3), the one end of connecting pivot (4) insert in bearing mounting hole (23) and with auxiliary bearing (3) coaxial coupling.

2. A turntable auxiliary support structure as claimed in claim 1, wherein: one end of the auxiliary bearing (3) close to the connecting rotating shaft (4) is connected with a limiting ring strip (5) in a butting mode, and a limiting ring groove (25) for installing the limiting ring strip (5) is coaxially formed in the hole wall of the bearing installing hole (23).

3. A turntable auxiliary support structure as claimed in claim 2, wherein: one end of the auxiliary bearing (3) deviating from the connecting rotating shaft (4) is abutted with a limiting blocking ring (6), and the limiting blocking ring (6) is coaxially installed on the hole wall of the bearing mounting hole (23).

4. A turntable auxiliary support structure as claimed in claim 1, wherein: connect pivot (4) including fixed first shaft segment (41), second shaft segment (42) and the third shaft segment (43) of coaxial coupling in proper order, first shaft segment (41) with auxiliary bearing (3) coaxial coupling, second shaft segment (42) are located between supporting seat (2) and the swing piece (101), third shaft segment (43) with swing piece (101) and be connected, the top side of second shaft segment (42) seted up with the plane of falling high (421) that the top of supporting seat (2) flushed.

5. An auxiliary support structure for a turntable as claimed in claim 4, wherein: a sealing assembly (7) is arranged between the supporting seat (2) and the second shaft section (42), and the sealing assembly (7) is used for reducing the height of the supporting seat (2) while sealing the bearing mounting hole (23);

the seal assembly (7) comprises a labyrinth seal (71) and a rotary seal (72), wherein the rotary seal (72) is positioned on one side of the labyrinth seal (71) close to the bearing installation hole (23).

6. An auxiliary support structure for a turntable as claimed in claim 5, wherein: the labyrinth seal (71) comprises a seal retaining ring (711), the seal retaining ring (711) is fixed on the second shaft section (42) and is coaxially arranged with the first shaft section (41), and a seal retaining groove (26) for the seal retaining ring (711) to coaxially insert and rotate is formed in the support seat (2).

7. A turntable auxiliary support structure as claimed in claim 5, wherein: the rotary sealing element (72) is a rotary sealing ring (721), a rotary ring groove (27) which is coaxially arranged with the bearing mounting hole (23) is formed in the supporting seat (2), and the rotary sealing ring (721) is located in the rotary ring groove (27) and abuts against the supporting seat (2) and the second shaft section (42).

8. A turntable auxiliary support structure as claimed in claim 1, wherein: the supporting seat (2) comprises a mounting base (21) and a connecting seat (22) which are detachably connected, the connecting seat (22) is located on the mounting base (21), and the bearing mounting hole (23) is formed in the connecting seat (22).

9. A turntable auxiliary support structure as claimed in claim 1, wherein: the auxiliary bearing (3) is a unilateral needle bearing.

10. A turntable auxiliary support structure as claimed in claim 1, wherein: one side that supporting seat (2) deviates from bearing mounting hole (23) seted up with back access hole (28) of the coaxial intercommunication of bearing mounting hole (23), can dismantle on supporting seat (2) to be connected with and be used for the lid to close sealed back lid (8) of back access hole (28) department, sealed back lid (8) with be provided with back sealing ring (9) between supporting seat (2), back sealing ring (9) support tightly lid (8) with supporting seat (2) after the seal.