High-rigidity machine tool workbench

Abstract

The utility model discloses a high rigidity machine tool work table, which comprises a work table shell, a work table top and a driving mechanism, the driving mechanism is provided with a main shaft which is matched with the work table top and is used for driving the work table top to rotate, and a bearing seat which is used for being matched with the main shaft through a bearing assembly in a rotating mode is concentrically arranged in the work table shell. Bearings of the bearing assembly are arranged in the axis direction of the main shaft. The working table is fixedly connected with the end part of the main shaft; the lower part of the working table surface is in running fit connection through a working table bearing arranged on a bearing seat, and a sealing mechanism for sealing the space where the working table bearing is located is arranged on the outer side of the working table bearing; the bearing, the workbench shell and the main shaft are concentrically arranged in a penetrating mode, the bearing is arranged in the axial direction of the main shaft to support the main shaft, and the overall structural rigidity of the workbench can be improved; and through cooling oil ways arranged in the bearing seat and the motor shell, the whole workbench is cooled in all directions, and continuous operation of the workbench is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to processing machine tool technical field, concretely relates to a high rigidity machine tool workstation. BACKGROUND

[0002] The numerical control machine tool workstation is an important component of mechanical parts and machining precision, and the requirement of the workstation is further improved. The machining range of the machine tool is extensive, and the overall rigidity, installation convenience, movement stability and the like of the workstation are required to be higher. The workstation is relatively cumbersome during installation and dismounting, is not easy to maintain, increases the replacement time, the cooling capacity is insufficient, the structural rigidity is insufficient, the use of the workstation is reduced, the machining efficiency is reduced, and the cost is increased. CONTENT OF THE UTILITY MODEL

[0003] TECHNICAL OBJECT: In view of the above-mentioned deficiencies of the existing numerical control machine tool workstation, the utility model discloses a high rigidity machine tool workstation.

[0004] TECHNICAL SCHEME: In order to achieve the above-mentioned technical purpose, the utility model adopts the following technical scheme:

[0005] A high rigidity machine tool workstation, including workstation housing, workstation surface and drive mechanism, the drive mechanism is set with the workstation surface cooperation for driving the main shaft of the workstation surface rotation, the workstation housing is concentric and is provided with the bearing seat for and the main shaft rotation cooperation through the bearing assembly, the bearing of the bearing assembly is arranged along the axial direction of the main shaft;The workstation surface is fixedly connected with the end part of the main shaft;The lower part of the workstation surface is rotationally connected through the workstation bearing arranged on the bearing seat, and the sealing mechanism for sealing the space where the workstation bearing is located is arranged outside the workstation bearing.

[0006] Preferably, the main shaft of the utility model adopts a stepped shaft structure, the bearing of the bearing assembly is installed at the junction of the step surface of each step, and the corresponding bearing seat is provided with an annular platform for supporting the bearing at the corresponding position of the bearing.

[0007] Preferably, the bearing assembly of the utility model includes a first bearing and a second bearing along the axial direction of the main shaft, the first bearing position corresponds to the axial position where the workstation bearing is located, and is separately arranged at the inner periphery and the outer periphery of the bearing seat, the spacer ring and the locking nut are sequentially arranged at the lower end of the first bearing, the spacer ring is pressed at the lower end surface of the first bearing through the locking nut, the first sealing flange is arranged at the upper end of the first bearing for limiting, and the adjusting washer for adjusting the height of the end part of the main shaft is arranged between the upper end surface of the first bearing and the cooperation surface of the main shaft.

[0008] Preferably, the second bearing of the utility model is arranged at the junction of the bearing seat and the driving mechanism, the bearing seat is provided with a pressing ring on the upper end face of the second bearing to cooperate with the stepped surface of the main shaft to limit the second bearing, the main shaft is provided with a second spacer ring and a second locking nut at the lower end of the second bearing, the second spacer ring is pressed against the lower end face of the second bearing through the second locking nut, and the second bearing is supported and limited by the annular platform of the bearing seat.

[0009] Preferably, the driving mechanism of the utility model comprises a motor housing in sealing cooperation with the lower end of the bearing seat, a sealing ring is embedded at the cooperation end face for sealing, a cooling oil circuit for cooling the bearings of the bearing assembly and the motor is arranged in the structure inside the motor housing and the bearing seat, and an oil pipe joint for oil inlet and oil return in communication with the cooling oil circuit is correspondingly arranged on the end face of the motor housing.

[0010] Preferably, the cooling oil circuit of the utility model comprises an oil inlet oil circuit and an oil return oil circuit arranged on the motor housing and a plurality of bearing cooling oil circuits arranged in the bearing seat, the oil inlet oil circuit and the oil return oil circuit are in communication with the corresponding oil pipe joints arranged on the end face of the motor housing, the oil inlet oil circuit is provided with a motor cooling oil circuit for entering the motor to cool the motor components, and the bearing cooling oil circuits are uniformly arranged along the circumferential direction of the bearing seat, each bearing cooling oil circuit is arranged penetratingly along the axial direction of the bearing seat, an annular groove for connecting the bearing cooling oil circuits at the head and tail to form a continuous broken line flow channel is arranged at the end of the bearing seat, and a sealing ring is arranged at the annular groove for sealing.

[0011] Preferably, the sealing mechanism of the utility model comprises a sealing ring arranged outside the workbench bearing, the bottom of the sealing ring is fixedly connected with the bearing seat, and the upper end is connected with a sealing groove arranged on the lower end face of the workbench face in a matched mode.

[0012] Preferably, the sealing mechanism of the utility model further comprises a sealing air channel arranged in the motor housing and the bearing seat, the sealing air channel is in communication with the position where the workbench bearing is located, and the sealing air channel is filled with gas to form an air seal with a gas pressure higher than that of the external environment of the workbench.

[0013] Preferably, the main shaft of the utility model is of a hollow structure, a drawbar for locking and fixing workpieces on the workbench is coaxially arranged in the main shaft, a fixed threaded hole is arranged at the end of the drawbar close to the workbench face, an oil cylinder for driving the drawbar to axially relatively move relative to the main shaft is connected to the other end of the drawbar, the oil cylinder is fixed to the end of the other end of the main shaft opposite to the workbench face, and the driving end of the oil cylinder is connected with the drawbar.

[0014] Beneficial effects: the high-rigidity machine tool workbench has the following beneficial effects:

[0015] 1. The utility model discloses a bearing, workbench shell, main shaft concentricity is equipped with, and the bearing is arranged along the axial direction of main shaft and supports main shaft, can improve the overall structural rigidity of workbench, the sealing mechanism of workbench bearing outside can effectively protect the environment in the main shaft and bearing seat, reduce the influence of external impurities to the operation of main shaft.

[0016] 2. The utility model discloses that the position of first bearing is separated from workbench bearing and is arranged on the inside and outside of bearing seat, can reduce the axial space occupation, shortens the length of main shaft, thereby further improves the rigidity of main shaft.

[0017] 3. The utility model discloses the cooling oil circuit that is arranged in motor shell and bearing seat can cool the motor and the bearing etc. component installed in bearing seat smoothly, guarantees the cooling effect while simplifying the cooling structure.

[0018] 4. The utility model discloses that the bearing cooling oil circuit on bearing seat is evenly distributed along the circumferential direction of bearing seat, and is communicated through the annular groove of bearing seat end part, can form the continuous broken line shape flow channel, thereby guaranteeing the uniform cooling of bearing seat and the bearing matched therewith, improves the cooling effect.

[0019] 5. The utility model discloses the sealing gas channel of sealing ring and workbench face rotary cooperation gap position sets up and passes in gas and carries out sealing, when not influencing workbench face rotation with main shaft, effectively prevents the external impurity from entering bearing seat through cooperation gap, guarantees the sealing effect, improves the service life. DRAWINGS

[0020] In order to make the technical scheme in the embodiments of the utility model or prior art clearer, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description.

[0021] Figure 1 It is the whole structure schematic diagram of the utility model workbench;

[0022] Figure 2 It is the position section view of the utility model workbench oil inlet oil circuit;

[0023] Figure 3 It is the position section view of the utility model workbench oil return oil circuit;

[0024] Figure 4 It is the end surface annular groove setting schematic diagram of the utility model bearing seat;

[0025] Figure 5 It is the utility model workbench inner sealing gas channel setting schematic diagram;

[0026] Wherein, 1 - workbench shell, 2 - workbench, 3 - main shaft, 4 - bearing seat, 5 - workbench bearing, 6 - annular table, 7 - first bearing, 8 - second bearing, 9 - spacer, 10 - locking nut, 11 - first sealing flange, 12 - adjusting washer, 13 - pressure ring, 14 - second spacer, 15 - second locking nut, 16 - motor housing, 17 - oil inlet, 18 - oil return, 19 - bearing cooling oil circuit, 20 - oil pipe joint, 21 - motor cooling oil circuit, 22 - annular groove, 23 - sealing ring, 24 - sealing groove, 25 - sealing airway, 26 - pull rod, 27 - fixed threaded hole, 28 - oil cylinder. DETAILED DESCRIPTION

[0027] Reference will now be made in detail to the embodiments of the present disclosure, one or more examples of which are set forth herein below. Each embodiment and example is provided by way of explanation of the present disclosure, not limitation. It will be apparent to those of ordinary skill in the art that various modifications and variations can be made to the present disclosure without departing from the scope or spirit of the present disclosure. Thus, it is intended that the present disclosure cover all such modifications and variations as fall within the scope of the present disclosure.

[0028] As Figures 1-5 shown, the utility model discloses a high rigidity machine tool workbench, including workbench shell 1, workbench 2 and drive mechanism, the drive mechanism sets up with workbench 2 cooperation for driving workbench 2 rotation's main shaft 3, the concentricity of workbench shell 1 in bearing seat 4 for and main shaft 3 is through bearing assembly rotation cooperation and is arranged, the bearing of bearing assembly is along the axial direction of main shaft 3 and arranges, workbench 2 with main shaft 3 end fixed connection, workbench 2 lower part is through the workbench bearing 5 of setting on bearing seat 4 rotation cooperation connection, and the sealing mechanism for the space of workbench bearing 5 is set up in the outside of workbench bearing 5 and is sealed.

[0029] The utility model discloses a main shaft 3 is hollow structure, coaxially wear and set up for the workpiece on the workbench locking and fixing pull rod 26, pull rod 26 is close to workbench 2 and sets fixed threaded hole 27 at one end, and the oil cylinder 28 for driving pull rod 26 relative axial movement relative to main shaft 3 is connected to the other end of pull rod 26, and the oil cylinder 28 is fixed on the end of the other end of main shaft 3 opposite workbench, and the drive end of oil cylinder 28 is connected with pull rod 26, after pull rod 26 and workpiece etc. are fixed, pull rod 26 is pulled through oil cylinder 28, and workpiece can be closely attached to workbench 2, thereby guaranteeing the stability of workpiece in the processing.

[0030] The rigidity of the workbench mainly depends on the axial overall length and the supporting capacity at each axial position, the bearing seat structure is integrally arranged, a compact integrated structure is formed after the main shaft cooperates with the bearing assembly, and therefore the rigidity of the workbench is enhanced; in addition, the bearing seat is an integrated structure, and therefore the installation difficulty of the bearings at each position needs to be reduced as much as possible, for this purpose, the main shaft 3 adopts a stepped shaft structure, the bearings of the bearing assembly are installed at the junction of the stepped surfaces of each step, and the corresponding bearing seat 4 is provided with an annular table 6 for supporting the bearings at the corresponding position of the bearings, the stepped surfaces of the main shaft and the bearing seat are fully machined in advance to support and position the bearings, and therefore the structural assembly difficulty is reduced.

[0031] As shown in Figure 1 In a specific embodiment, the bearing assembly of the utility model comprises a first bearing 7 and a second bearing 8 along the axial direction of the main shaft 3, the first bearing 7 is located at the axial position corresponding to the workbench bearing 5 and is arranged at the inner periphery and the outer periphery of the bearing seat 4, the spacer ring 9 and the locking nut 10 are sequentially arranged at the lower end of the first bearing 7, the spacer ring 9 is pressed at the lower end surface of the first bearing 7 through the locking nut 10, cooperates with the inner periphery of the first bearing 7, the lower end surface of the outer ring of the first bearing 7 is supported through the annular table 6, the first sealing flange 11 is arranged at the upper end of the first bearing 7 to limit the position, the adjusting gasket 12 for adjusting the height of the end of the main shaft is arranged between the upper end surface of the first bearing 7 and the matching surface of the main shaft 3, the adjusting gasket 12 cooperates with the upper end surface of the inner ring of the first bearing 7, and the first sealing flange 11 cooperates with the upper end surface of the outer ring of the first bearing 7; the matching gap is ensured through the adjusting gasket 12, so that the main shaft 3 and the workbench surface 2 do not collide or rub with the fixed components such as the bearing seat 4 when rotating; the sealing mechanism is responsible for sealing the dynamic and static interface between the workbench surface 2 and the bearing seat 4, the sealing mechanism of the utility model comprises a sealing ring 23 arranged outside the workbench bearing 5, the bottom of the sealing ring 23 is fixedly connected with the bearing seat 4, and the upper end is connected with the sealing groove 24 arranged on the lower end surface of the workbench surface 2. In addition, for the matching gap of the matching surface, the sealing mechanism of the utility model further comprises a sealing air channel 25 arranged in the motor housing 16 and the bearing seat 4, the sealing air channel 25 is communicated with the position where the workbench bearing 5 is located, gas is filled in the sealing air channel 25 to form a gas seal with a gas pressure higher than that of the external environment of the workbench, so that external impurities are prevented from entering the area where the bearings are located through the matching gap.

[0032] The second bearing 8 is arranged at the junction of the bearing seat 4 and the driving mechanism, the bearing seat 4 is provided with a pressing ring 13 on the end face of the second bearing 8 to limit the second bearing 8 by cooperating with the stepped surface of the main shaft 3, the pressing ring 13 cooperates with the upper end face of the outer ring of the second bearing 8, the main shaft 3 is provided with a second spacer ring 14 and a second locking nut 15 at the lower end of the second bearing 8, the second spacer ring 14 is pressed against the lower end face of the inner ring of the second bearing 8 through the second locking nut 15, and the second bearing 8 is supported and limited by cooperating with the annular platform 6 of the bearing seat 4. The bearing mounting structure of the utility model can effectively support and fix the inner and outer rings of the first bearing 7 and the second bearing 8 by cooperating with the stepped surface of the main shaft and the annular platform of the bearing seat 6.

[0033] Compared with the bearing seat arranged separately, the overall bearing seat arrangement of the utility model is not convenient for directly cooling the internal bearing, and therefore Figures 2-4 the utility model further provides a flow channel structure capable of cooling all bearings, motors and main shafts and the like, the driving mechanism of the utility model comprises a motor housing 16 sealingly cooperating with the lower end of the bearing seat 4, a sealing ring is embedded at the cooperating end face to seal, a cooling oil channel for cooling the bearings of the bearing assembly and the motor is arranged in the structure inside the motor housing 16 and the bearing seat 4, and an oil pipe joint corresponding to the cooling oil channel is arranged on the end face of the motor housing to communicate with the cooling oil channel to feed and return oil.

[0034] The cooling oil channel of the utility model comprises an oil feeding channel 17 and an oil returning channel 18 arranged on the motor housing and a plurality of bearing cooling oil channels 19 arranged in the bearing seat 4, the oil feeding channel 17 and the oil returning channel 18 are in communication with the corresponding oil pipe joints 20 arranged on the end face of the motor housing 16, the oil feeding channel 17 is provided with a motor cooling oil channel 21 for feeding the motor into the motor to cool the motor components, the bearing cooling oil channels 19 are evenly arranged along the circumferential direction of the bearing seat 4, each bearing cooling oil channel 19 is arranged penetratingly along the axial direction of the bearing seat 4, an annular groove 22 for connecting the bearing cooling oil channels 19 at the head and tail to form a continuous zigzag flow channel is arranged at the end of the bearing seat 4, a sealing ring is arranged at the annular groove 22 to seal, the cooling oil is limited in the annular groove 22 by the sealing ring and cannot leak, the two bearing cooling oil channels 19 connected by the same annular groove 22 are in communication with each other to exchange the cooling oil, the cooling oil flows from one bearing cooling oil channel 19 into another bearing cooling oil channel 19, and the exchanged cooling oil repeats the above process when flowing into the annular groove 22 at the other end of the bearing seat 4, the exchange of the cooling oil between the bearing cooling oil channels 19 is sequentially carried out along the circumferential direction of the bearing seat, and a zigzag type back-and-forth oil channel flow mode is formed, only the bearing cooling oil channels at the starting point and the terminal position are connected with the oil feeding channel 17 and the oil returning channel 18 to form a complete cooling oil feeding and returning path, and the cooling and temperature reduction of the motor, the main shaft and the bearing are completed.

[0035] The whole workbench arrangement mode of the utility model can make full use of space, and through the cooperation between the main shaft and the bearing and the arrangement of the cooling pipeline, the precision and stability of the workbench are ensured. Compared with the traditional arrangement structure, the utility model can ensure high-precision machining of the machine tool, improve the quality and precision of the product. The air seal can improve the sealing performance of the workbench, further improve the carrying capacity of the workbench, improve the motion precision of the workbench, meet the requirements of different specifications, have good versatility, increase the stability and reliability of long-time use, and greatly improve the production efficiency.

Claims

1. A high rigidity machine tool table, characterized by, The utility model provides a workbench, including workbench shell (1), workbench face (2) and drive mechanism, the drive mechanism sets up main shaft (3) with workbench face (2) cooperation for driving workbench face (2) rotation, the workbench shell (1) inside concentricity sets up bearing seat (4) for with main shaft (3) through bearing assembly rotation cooperation, the bearing of bearing assembly is arranged along the axis direction of main shaft (3), workbench face (2) is fixedly connected with the end of main shaft (3), workbench face (2) lower part is rotationally connected through workbench bearing (5) set up on bearing seat (4), and the sealing mechanism for sealing the space where workbench bearing (5) is located is set up outside workbench bearing (5).

2. A high rigidity machine tool table according to claim 1, wherein The main shaft (3) adopts a stepped shaft structure, and the bearings of the bearing assembly are installed at the junction of the stepped surfaces of each step. The corresponding bearing seat (4) is provided with an annular table (6) for supporting the bearings at the corresponding positions of the bearings.

3. A high rigidity machine tool table according to claim 2, wherein The bearing assembly includes a first bearing (7) and a second bearing (8) along the axis direction of the main shaft (3). The first bearing (7) is located at a position corresponding to the axial position of the workbench bearing (5) and is separately arranged at the inner periphery and the outer periphery of the bearing seat (4). The main shaft (3) is sequentially provided with a spacer ring (9) and a locking nut (10) at the lower end of the first bearing (7). The spacer ring (9) is pressed against the lower end surface of the first bearing (7) by the locking nut (10). The first bearing (7) is limited by a first sealing flange (11) at the upper end thereof. An adjusting gasket (12) is arranged between the upper end surface of the first bearing (7) and the mating surface of the main shaft (3) to adjust the height of the end of the main shaft.

4. A high rigidity machine tool table according to claim 3, wherein The second bearing (8) is arranged at the junction of the bearing seat (4) and the drive mechanism. The bearing seat (4) is provided with a pressing ring (13) at the upper end surface of the second bearing (8) to limit the second bearing (8) in cooperation with the stepped surface of the main shaft (3). The main shaft (3) is provided with a second spacer ring (14) and a second locking nut (15) at the lower end of the second bearing (8). The second spacer ring (14) is pressed against the lower end surface of the second bearing (8) by the second locking nut (15). The second bearing (8) is supported and limited by the annular table (6) of the bearing seat (4).

5. A high rigidity machine tool table according to claim 1, wherein The drive mechanism includes a motor housing (16) sealingly connected to the lower end of the bearing seat (4). A sealing ring is embedded in the mating end surface for sealing. A cooling oil circuit is arranged in the structure of the motor housing (16) and the bearing seat (4) to cool the bearings of the bearing assembly and the motor. Oil pipe joints are arranged on the end surface of the motor housing corresponding to the cooling oil circuit for oil inlet and oil return.

6. A high rigidity machine tool table according to claim 5, wherein The cooling oil circuit comprises an oil inlet circuit (17) and an oil return circuit (18) arranged on the motor housing, and a plurality of bearing cooling oil circuits (19) arranged in the bearing seat (4), the oil inlet circuit (17) and the oil return circuit (18) are communicated with corresponding oil pipe joints (20) arranged on the end face of the motor housing (16), the oil inlet circuit (17) is provided with a motor cooling oil circuit (21) for entering the motor to cool the motor components; the bearing cooling oil circuits (19) are uniformly arranged along the circumferential direction of the bearing seat (4), each bearing cooling oil circuit (19) is arranged along the axis direction of the bearing seat (4), and the annular groove (22) for connecting the bearing cooling oil circuits (19) at the head and tail to form a continuous broken line flow channel is arranged at the end of the bearing seat (4), and the sealing ring is arranged at the annular groove (22) for sealing.

7. A high rigidity machine tool table according to claim 1, wherein The sealing mechanism comprises a sealing ring (23) arranged outside the workbench bearing (5), the bottom of the sealing ring (23) is fixedly connected with the bearing seat (4), and the upper end is connected with the sealing groove (24) arranged on the lower end face of the workbench face (2).

8. A high rigidity machine tool table according to claim 7, wherein The sealing mechanism further comprises a sealing air channel (25) arranged in the motor housing (16) and the bearing seat (4), the sealing air channel (25) is communicated with the position where the workbench bearing (5) is located, and the sealing air channel (25) is filled with gas to form an air seal with air pressure higher than that of the external environment of the workbench.

9. A high rigidity machine tool table according to claim 1, wherein The main shaft (3) is a hollow structure, and a pull rod (26) for locking and fixing the workpiece on the workbench is coaxially arranged, the pull rod (26) is provided with a fixed threaded hole (27) at one end close to the workbench face (2), and an oil cylinder (28) for driving the pull rod (26) to axially relatively move relative to the main shaft (3) is connected at the other end of the pull rod (26), the oil cylinder (28) is fixed on the end of the main shaft (3) opposite to the workbench face, and the driving end of the oil cylinder (28) is connected with the pull rod (26).

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