CN216966977U - Machining workbench driven by double motors and double gears - Google Patents

Abstract

The utility model discloses a machining workbench driven by double motors and double gears, and belongs to the technical field of design of machining workbenches. The automatic gear shifting device comprises a base, a workbench, a first motor, a first gear, a second motor and a second gear, wherein the first motor drives the first gear to rotate, the second motor drives the second gear to rotate, the workbench and a driven gear are coaxially arranged, and both the workbench and the driven gear can be rotatably arranged on the base; the gear teeth surface of the driven gear comprises a first abutting surface and a second abutting surface, the first abutting surface and the second abutting surface are respectively located on two sides of the gear teeth of the driven gear, the gear teeth of the first gear abut against the first abutting surface when the first gear is meshed with the driven gear, and the gear teeth of the second gear abut against the second abutting surface when the second gear is meshed with the driven gear. According to the utility model, the driven gear is limited through double-gear transmission, so that the gear load is reduced, and the gear transmission stability during motor driving is improved.

Description

Machining workbench driven by double motors and double gears

Technical Field

The utility model relates to the technical field of design of machining workbenches, in particular to a machining workbench driven by double motors and double gears.

Background

When a large-sized machine tool machines a corresponding large-sized workpiece, the table itself on which the workpiece to be machined is placed also has a turning function.

The machining workbench of the existing machine tool adopts a single-motor gear transmission system, namely, the workbench is coaxially and fixedly connected with a driven gear, a driving gear is driven by a motor, and the driving gear drives the driven gear so as to drive the workbench to rotate.

However, in a single-gear transmission system, due to the fact that errors exist in manufacturing and assembling of the single-gear transmission system, elastic deformation and thermal expansion effects also exist in the transmission work of the gears, and the driving gear and the driven gear cannot be meshed seamlessly. The size of the gear teeth of the driving gear is smaller than the size of the gear teeth clearance of the driven gear, so that when the driving gear drives the driven gear to realize steering transmission, the gear teeth of the driving gear do invalid motion in the gear teeth clearance of the driven gear, collision impact between the gear teeth and the gear teeth is generated, and the gear strength and the transmission working stability are reduced.

In addition, because the size difference between the gear teeth and the gear teeth is not controllable, the driven gear rotates by the difference distance in the process of machining the workpiece, and the machining quality and the machining precision of the workpiece are affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a machining workbench driven by double motors and double gears, which is used for driving and limiting a driven gear through the double gears and solving the technical problem.

The technical scheme for solving the problems is as follows: the machining workbench driven by the double motors and the double gears comprises a base, the workbench, a first motor, a first gear, a second motor and a second gear, wherein the first motor drives the first gear to rotate, the second motor drives the second gear to rotate, the workbench and a driven gear are coaxially arranged, and both the workbench and the driven gear can be rotatably arranged on the base; the gear tooth surface of the driven gear comprises a first abutting surface and a second abutting surface, the first abutting surface and the second abutting surface are respectively located on two sides of the gear tooth of the driven gear, the gear tooth of the first gear abuts against the first abutting surface when the first gear is meshed with the driven gear, and the gear tooth of the second gear abuts against the second abutting surface when the second gear is meshed with the driven gear.

Further, driven gear sets up between workstation and base, still the installation is provided with the flat bearing on the base, the flat bearing interval is between driven gear and base. The plane bearing is used for being connected between the workbench and the base, so that abrasion caused by direct contact between the workbench and the base due to rotation of the workbench is avoided, and friction is reduced through the bearing structure to improve the rotating speed.

Furthermore, the plane bearing is set to be a zero back clearance plane roller bearing, so that the condition that no load occurs instantly due to the fact that a fit clearance exists between the workbench and the base is avoided.

Further, the base center department vertically installs rotatable rotatory main shaft, the workstation is installed at rotatory main shaft upper end department, driven gear establishes to fix on the rotatory main shaft. The workbench and the driven gear both use the rotating main shaft as a central shaft body and rotate around the rotating main shaft body.

Further, the device also comprises a gear reducer arranged between the first motor and the first gear; a gear reducer is also arranged between the second motor and the second gear. The gear reducer is arranged between the first motor and the first gear and used for transmitting the output power of the motor, and the gear reducer can also convert the input power of the motor with high low torque into the output gear rotating power with relatively low speed but high torque in the process of transmitting the power, and is used for machining large-sized workpieces such as wind power bearings so as to facilitate the implementation of thread milling. The same applies to the second motor and the second gear.

Further, the gear reducer comprises a coupler and a gear transmission mechanism, wherein the coupler is in transmission connection with an output shaft of the motor and an output gear shaft of the gear transmission mechanism. The output rotating shaft of the first motor is connected with the coupling, and the power of the motor can be smoothly input to the gear reducer. The same applies to the second motor.

Further, gear drive includes input gear, output gear, reduction gear train, input gear and the coaxial setting of shaft coupling, output gear meshing connects in first gear or second gear, reduction gear train meshing connects in input gear and output gear simultaneously to reduce gear output rotational speed. The input power of the motor is transmitted through the input gear, the reduction gear train and the output gear in sequence, the power of the motor is adjusted when being transmitted into the reduction gear train, and the output power with large torque and low rotating speed is output at the output gear.

Further, the reduction gear train comprises a first transmission gear, a first bevel gear, a second bevel gear and a second transmission gear, the first bevel gear and the first transmission gear are coaxially and fixedly arranged, the second bevel gear and the second transmission gear are coaxially and fixedly arranged, the first transmission gear is connected to the input gear in a meshed mode, the second transmission gear is connected to the first gear or the second gear in a meshed mode, and the first bevel gear is connected with the second bevel gear in a meshed mode. Set up bevel gear in the reduction gear train in order to change motor power take off direction to for motor and gear reducer's mounted position facilitates, make motor, gear reducer can set up the installation around the workstation, reduce the motor installation degree of difficulty.

The utility model has the beneficial effects that:

the utility model relates to a machining workbench driven by double motors and double gears, which is powered by two sets of driving systems, wherein each driving system comprises a motor and a gear, and when two gears of the two driving systems are meshed and connected with a driven gear of the workbench, gear teeth of the two gears of the two driving systems are respectively contacted with two different tooth surfaces of the gear teeth of the driven gear.

When the driven gear and the workbench are driven to rotate: firstly, when the workbench rotates in two directions (the rotating direction is changed), because the first gear and the second gear are respectively abutted against two different abutting surfaces of the gear teeth of the driven gear, the rotation of the workbench is changed to be forward, the workbench is driven to rotate by the first motor and the first gear, the power output of the second motor and the second gear is not on the driven gear, and the second motor and the second gear only rotate along with the workbench; after the workbench rotates and changes direction, the workbench is driven to rotate by the second motor and the second gear, and the first motor and the first gear rotate along with the workbench. Secondly, during workstation unidirectional rotating (clockwise rotation or anticlockwise rotation), when the workstation began to rotate or stall (or during workstation rotational speed variation), first gear and second gear act on driven gear jointly to form "press from both sides tight spacing" effect to driven gear, spacing in order to prevent appearing as in the background art first gear or second gear in driven gear's the phenomenon of teeth of a cogwheel clearance removal, and then prevent that the teeth of a cogwheel of first gear or second gear from colliding with driven gear's the teeth of a cogwheel and impacting, influence gear strength and power transmission.

In addition, the first gear and the second gear act on the driven gear together, when the motor stops, the driven gear rotates inertially, the inertial rotation distance of the driven gear is equal to the distance obtained by subtracting the size of the gear teeth of the first gear from the gear teeth clearance distance of the driven gear, although the distance is small, the machining precision can be influenced in high-precision machining, and the device can also eliminate the defect by the double-motor double-gear driving mode.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the utility model. For a person skilled in the art, other figures can be derived from these figures without inventive effort.

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a table mounting structure according to an embodiment of the present invention;

FIG. 3 is a block diagram of a gear system according to an embodiment of the present invention;

fig. 4 is a schematic diagram of the meshing connection matching state of the first gear and the second gear with the driven gear according to the specific embodiment of the utility model.

1-base, 2-workbench, 3-first motor, 4-first gear, 5-second motor, 6-second gear, 7-driven gear, 8-first abutting surface, 9-second abutting surface, 10-plane bearing, 11-rotating spindle, 12-gear reducer, 13-coupler, 14-gear transmission mechanism, 15-input gear, 16-output gear, 17-reduction gear train, 18-first transmission gear, 19-first bevel gear, 20-second bevel gear and 21-second transmission gear.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

Referring to fig. 1 to 4, a dual-motor dual-gear driving machining workbench according to an embodiment of the present invention includes a base 1, a workbench 2, a first motor 3, a first gear 4, a second motor 5, and a second gear 6, where the first motor 3 drives the first gear 4 to rotate, the second motor 5 drives the second gear 6 to rotate, and the workbench 2 and a driven gear 7 are coaxially disposed and both of the two can be rotatably disposed on the base 1. The first motor 3 drives the first gear 4 to rotate, and the first gear 4 is meshed with the driven gear 7 to drive the driven gear 7, and the driven gear 7 drives the workbench 2 to synchronously rotate; the second motor 5 drives the second gear 6 to rotate, and the second gear 6 is meshed with the driven gear 7 to drive the driven gear 7 to rotate. Both motors are used to drive the table 2.

In the present embodiment, the first motor 3 and the second motor 5 are started or stopped synchronously.

Firstly, a base 1 is fixed on a reference surface, a plane bearing 10 is installed on the base 1, a driven gear 7 is arranged above the plane bearing 10, and a workbench 2 is arranged above the driven gear 7. The flat bearing 10 is spaced between the driven gear 7 and the base 1 to facilitate rotation of the driven gear 7 and to improve rotational stability of the driven gear 7.

Second, the first gear 4 and the second gear 6 are both provided at the outer periphery of the driven gear 7 in a planetary arrangement, and the first gear 4 and the second gear 6 are engaged at two positions of the driven gear 7, respectively. Although the first gear 4 and the second gear 6 are engaged at two different positions of the driven gear 7, the driven gear 7 is after all a regulating gear, the two tooth contact surfaces of each tooth of which can be distinguished into a first abutment surface 8 and a second abutment surface 9. That is to say: in the present embodiment and in the present application, although the driven gear 7 is composed of a plurality of teeth, each tooth has two tooth surfaces, i.e. a first abutting surface 8 and a second abutting surface 9, which can be abutted against the teeth of the first gear 4 or the second gear 6.

Based on the explanation of the first abutting surface 8 and the second abutting surface 9, in the normal one-way operation rotation (including clockwise rotation and counterclockwise rotation) of the table 2, the gear teeth of the first gear 4 are in abutting contact with the first abutting surface 8 when the first gear 4 is in meshing connection with the driven gear 7, and the gear teeth of the second gear 6 are in abutting contact with the second abutting surface 9 when the second gear 6 is in meshing connection with the driven gear 7. Like this, first gear 4 and second gear 6 cooperate each other, just can carry on spacingly to driven gear 7 to avoid when the teeth of a cogwheel size of first gear 4, second gear 6 all is less than the teeth of a cogwheel clearance size of driven gear 7, the removal in the teeth of a cogwheel clearance appears between driven gear 7 and first gear 4 or driven gear 7 and the second gear 6, avoid installing the problem that the machining precision was drawn down because of this indeterminate movement error to the machined part on the processing platform.

Third, in the present embodiment, the first motor 3 and the second motor 5 are synchronously started or stopped. The method specifically comprises the following steps: when the first motor 3 is started or the first motor 3 is stopped, the rotating speed of the first gear 4 is changed along with the change of the rotating speed, at the moment, the second motor 5 is started simultaneously or the second motor 5 is stopped simultaneously, and the rotating speed of the second gear 6 is synchronous with the rotating speed of the first gear 4, the running time of the second gear 6 is synchronous with the running time of the first gear 4. When the first motor 3 rotates reversely, the first gear 4 rotates reversely therewith, at the same time, the second motor 5 rotates reversely, and the second gear 6 and the first gear 4 start to rotate reversely synchronously.

With reference to the drawings of the specification, when the first motor 3 drives the first gear 4 and the second motor 5 drives the second gear 6, the gear teeth of the first gear 4 abut against the first abutting surface 8 and the gear teeth of the second gear 6 abut against the second abutting surface 9, so that the first gear 4 and the second gear 6 are always meshed and abutted with the driven gear 7 in the whole one-way operation (clockwise rotation and anticlockwise rotation) process of the workbench 2, and the phenomenon that the driven gear 7 and the first gear 4 or the driven gear 7 and the second gear 6 move in the gear tooth gap is avoided. When the rotating speed of the workbench 2 is changed (the first motor 3 is started or stopped, and the second motor 5 is started or stopped), because the sizes of the gear teeth of the first gear 4 and the second gear 6 are smaller than the size of the gear tooth gap of the driven gear 7, the gear teeth of the first gear 4 or the second gear 6 cannot move from the first abutting surface 8 to the second abutting surface 9, so that the impact of the movement on the gear teeth of the gears is avoided, and the stability of power transmission and the service life of the gears are improved.

Fourthly, when the bidirectional movement process of the workbench 2, that is, the rotation direction of the workbench 2 is changed, if the transmission structure is a single gear transmission structure, the gear teeth of a single driving gear need to be moved from the first abutting surface 8 of the driven gear 7 to the second abutting surface 9 thereof, so that the driving gear can push the driven gear 7 to perform the direction-changing movement. However, in the single gear transmission structure, when the teeth of the driving gear move from the first contact surface 8 to the second contact surface 9 of the driven gear 7, the driving gear and the driven gear 7 move in opposite directions during the movement period, and the speed difference between the driving gear and the driven gear 7 is the largest when the driving gear contacts the second contact surface 9, and at this time, the collision between the teeth is the most violent, and the damage to the gear is the largest. On the contrary, in the single gear transmission structure, the collision occurs in the process of moving the gear teeth of the driving gear from the second contact surface 9 to the first contact surface 8 of the driven gear 7, and the principle is the same as described above.

In the application, the first motor 3 drives the first gear 4, the second motor 5 drives the second gear 6, the first gear 4 and the second gear 6 are in constant mesh connection with the driven gear 7, the gear teeth of the first gear 4 are in constant contact with the first abutting surface 8 of the driven gear 7, and the gear teeth of the second gear 6 are in constant contact with the second abutting surface 9 of the driven gear 7. Although the first motor 3 and the second motor 5 are operated synchronously, in actual driving operation, the power of different steering motions of the driven gear 7 is derived from the first gear 4 and the second gear 6, respectively. For example, when the driven gear 7 rotates clockwise, the teeth of the first gear 4 abut against the first abutting surface 8 to push the driven gear 7 to rotate, the second gear 6 rotates synchronously, but the power is not transmitted to the driven gear 7; when the driven gear 7 rotates counterclockwise, the teeth of the second gear 6 abut against the second abutting surface 9 to push the driven gear 7 to rotate, although the first gear 4 rotates synchronously, the teeth of the first gear 4 abut against the first abutting surface 8, and the power is not transmitted to the driven gear 7.

In addition, in this embodiment, a spindle mounting hole seat is disposed at a central line of the base 1, the rotating spindle 11 is inserted into the spindle mounting hole seat, and a protection bearing is further installed in the spindle mounting hole seat. The driven gear 7 is also mounted on this rotary spindle 11, and the table 2 is mounted at the upper end of the rotary spindle 11.

In this embodiment, the flat bearing 10 is provided as a zero backlash flat roller bearing.

As a supplement to this embodiment, a gear reducer 12 is provided between the first motor 3 and the first gear 4, and a gear reducer 12 is also provided between the second motor 5 and the second gear 6. The gear reducer 12 is arranged between the first motor 3 and the first gear 4 and between the second motor 5 and the second gear 6, and mainly functions to convert the output power of the motor, reduce the output rotating speed of the motor, increase the torque and meet the processing requirements of large-scale processing pieces.

The gear reducer 12 comprises a gear transmission mechanism 14 and a coupler 13, the gear transmission mechanism 14 comprises an input gear 15, an output gear 16 and a reduction gear train 17, the input gear 15 and the coupler 13 are coaxially arranged, the coupler 13 is connected to an output rotating shaft of the first motor 3 or the second motor 5, and the output gear 16 is correspondingly meshed with the first gear 4 or the second gear 6. The motor output power is transmitted from the input gear 15 to the reduction gear train 17, thereby reducing the speed and increasing the torque.

In the present embodiment, the speed reduction function of the reduction gear train 17 is mainly realized by setting the gear ratio, so that the main components in the reduction gear train 17 are all gears. In addition, in order to facilitate the installation of the first motor 3 and the second motor 5, the first motor 3 and the second motor 5 are installed on the reference surface at the same height as the base 1, and a bevel gear structure is additionally arranged in the reduction gear train 17 in the application.

Based on this, the reduction gear train 17 of the present embodiment includes: the device comprises a first transmission gear 18, a first bevel gear 19, a second bevel gear 20 and a second transmission gear 21, wherein the first transmission gear 18 is meshed with the input gear 15, the first bevel gear 19 and the first transmission gear 18 are coaxially arranged and synchronously rotate, the first bevel gear 19 and the second bevel gear 20 are meshed and connected, the second transmission gear 21 and the second bevel gear 20 are coaxially arranged and synchronously rotate, the second transmission gear 21 is meshed and connected with the output gear 16, and the output gear 16 and the first gear 4 or the second gear 6 are coaxially arranged. The designer sets the transmission ratio between the gears in the reduction gear train 17 with the meshing connection relationship to be a reduction transmission ratio so as to achieve the purposes of reducing the output rotating speed of the motor and increasing the output torque of the motor.

Where not mentioned above, all are applicable to the prior art.

Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. The utility model provides a bi-motor double gear drive's processing workstation which characterized in that: the automatic gear shifting device comprises a base (1), a workbench (2), a first motor (3), a first gear (4), a second motor (5) and a second gear (6), wherein the first motor (3) drives the first gear (4) to rotate, the second motor (5) drives the second gear (6) to rotate, the workbench (2) and a driven gear (7) are coaxially arranged, and both the workbench (2) and the driven gear (7) can be rotatably arranged on the base (1); the teeth of a cogwheel face of driven gear (7) includes first butt face (8) and second butt face (9), and first butt face (8) and second butt face (9) are located the teeth of a cogwheel both sides of driven gear (7) respectively, the teeth of a cogwheel butt of first gear (4) is in first butt face (8) when first gear (4) and driven gear (7) meshing connection, the teeth of a cogwheel butt of second gear (6) is in second butt face (9) when second gear (6) and driven gear (7) meshing connection.

2. A dual motor dual gear driven machining station as claimed in claim 1, wherein: driven gear (7) set up between workstation (2) and base (1), still the installation is provided with flat bearing (10) on base (1), flat bearing (10) interval is between driven gear (7) and base (1).

3. A dual motor dual gear driven machining station as claimed in claim 2, wherein: the plane bearing (10) is set to be a zero back clearance plane roller bearing.

4. A dual motor dual gear driven machining station as claimed in claim 1, wherein: base (1) center department is vertical installs rotatable rotating main shaft (11), workstation (2) are installed in rotating main shaft (11) upper end department, driven gear (7) cover is established and is fixed on rotating main shaft (11).

5. A dual motor dual gear driven machining station as claimed in claim 1, wherein: the gear reducer (12) is arranged between the first motor (3) and the first gear (4); a gear reducer (12) is also arranged between the second motor (5) and the second gear (6).

6. A dual motor dual gear driven machining station as defined in claim 5, wherein: the gear reducer (12) comprises a coupler (13) and a gear transmission mechanism (14), wherein the coupler (13) is in transmission connection with an output shaft of the motor and an output gear shaft of the gear transmission mechanism (14).

7. A dual motor dual gear driven machining station as claimed in claim 6, wherein: the gear transmission mechanism (14) comprises an input gear (15), an output gear (16) and a reduction gear train (17), wherein the input gear (15) and the coupler (13) are coaxially arranged, the output gear (16) is meshed and connected with the first gear (4) or the second gear (6), and the reduction gear train (17) is meshed and connected with the input gear (15) and the output gear (16) at the same time to reduce the output rotating speed of the gears.

8. A dual motor dual gear driven machining station as claimed in claim 7, wherein: the reduction gear train (17) comprises a first transmission gear (18), a first bevel gear (19), a second bevel gear (20) and a second transmission gear (21), the first bevel gear (19) and the first transmission gear (18) are coaxially and fixedly arranged, the second bevel gear (20) and the second transmission gear (21) are coaxially and fixedly arranged, the first transmission gear (18) is connected with the input gear (15) in a meshed mode, the second transmission gear (21) is connected with the first gear (4) or the second gear (6) in a meshed mode, and the first bevel gear (19) is connected with the second bevel gear (20) in a meshed mode.

Images