阅读说明：本技术 一种三辊星型精密轧机丝杆推拉机构 (Three-roller star-shaped precision rolling mill lead screw push-pull mechanism ) 是由 董兴亮 何文祥 冯春安 杨维清 邓兵 唐菠 魏稼丰 于 2020-07-07 设计创作，主要内容包括：本发明属于轧机推拉机构技术领域,具体涉及一种三辊星型精密轧机丝杆推拉机构。其技术方案为：一种三辊星型精密轧机丝杆推拉机构,包括安装于轧机基座的安装板,安装板上安装有若干驱动机构,驱动机构具有若干个输出端,驱动机构的输出端连接有传动丝杆,传动丝杆的另一端转动连接有支撑座,支撑座安装于轧机基座上；还包括推拉座,推拉座与轧机基座滑动连接,推拉座上连接有若干螺母,螺母与传动丝杆螺纹连接,推拉座上连接有用于拉动轧机的拉钩。本发明提供了一种传动精准且空间范围要求小的三辊星型精密轧机丝杆推拉机构。(The invention belongs to the technical field of rolling mill push-pull mechanisms, and particularly relates to a three-roller star-shaped precision rolling mill screw rod push-pull mechanism. The technical scheme is as follows: a three-roller star-shaped precision rolling mill screw rod push-pull mechanism comprises a mounting plate mounted on a rolling mill base, wherein a plurality of driving mechanisms are mounted on the mounting plate, each driving mechanism is provided with a plurality of output ends, the output ends of the driving mechanisms are connected with transmission screw rods, the other ends of the transmission screw rods are rotatably connected with supporting seats, and the supporting seats are mounted on the rolling mill base; the rolling mill base is connected with the rolling mill base in a sliding mode, the push-pull seat is connected with a plurality of nuts, the nuts are in threaded connection with the transmission screw rod, and the push-pull seat is connected with a drag hook used for pulling the rolling mill. The invention provides a lead screw push-pull mechanism of a three-roller star-shaped precision rolling mill, which has accurate transmission and small space range requirement.)

1. A three-roller star-shaped precise rolling mill screw rod push-pull mechanism is characterized by comprising a mounting plate (2) mounted on a rolling mill base (1), wherein a plurality of driving mechanisms (3) are mounted on the mounting plate (2), each driving mechanism (3) is provided with a plurality of output ends, the output ends of the driving mechanisms (3) are connected with a transmission screw rod (4), the other end of the transmission screw rod (4) is rotatably connected with a supporting seat (5), and the supporting seats (5) are mounted on the rolling mill base (1); the rolling mill base is characterized by further comprising a push-pull seat (6), the push-pull seat (6) is in sliding connection with the rolling mill base (1), a plurality of nuts (7) are connected onto the push-pull seat (6), the nuts (7) are in threaded connection with the transmission screw rod (4), and a draw hook (9) used for drawing the rolling mill (8) is connected onto the push-pull seat (6).

2. The lead screw push-pull mechanism of the three-roll star-shaped precision rolling mill according to claim 1, characterized in that the driving mechanism (3) comprises a speed reducer (31), the speed reducer (31) is installed on the installation plate (2), the transmission lead screw (4) is connected to the output end of the speed reducer (31), the input end of the speed reducer (31) is connected with a coupler (32), the other end of the coupler (32) is connected with a motor (33), and a fixed support (34) is connected between the motor (33) and the speed reducer (31).

3. The lead screw push-pull mechanism of the three-roller star-shaped precision rolling mill according to claim 2, characterized in that the motor (33) is a servo speed reduction motor, and a position sensor is arranged at the installation position of the rolling mill (8) of the rolling mill base (1); the intelligent control system is electrically connected with the servo speed reducing motor and the position sensor respectively.

4. The lead screw push-pull mechanism of the three-roller star-shaped precision rolling mill according to claim 2, characterized in that the speed reducer (31) comprises a speed reducer housing (311), the speed reducer housing (311) is connected to the mounting plate (2), and the fixing support (34) is connected with the speed reducer housing (311); one end, far away from the supporting seat (5), of the transmission screw rod (4) is rotatably connected into the speed reducer shell (311), and the output end of the coupler (32) is connected with one of the transmission screw rods (4).

5. The lead screw push-pull mechanism of the three-roller star-shaped precision rolling mill according to claim 4, characterized in that the number of the transmission lead screws is at least two, the transmission lead screws (4) are provided with driving gears (312), reversing gears (313) are meshed between the driving gears (312) of two adjacent transmission lead screws (4), the reversing gears (313) are rotatably connected with fixed shafts (314), and the fixed shafts (314) are connected in the speed reducer shell (311).

6. The lead screw push-pull mechanism of the three-roller star-shaped precision rolling mill according to claim 5, characterized in that the number of the transmission lead screws (4) connected in the speed reducer is two.

7. The lead screw push-pull mechanism of the three-roller star-shaped precision rolling mill according to claim 1, characterized in that sliding grooves (61) are arranged on two sides of the push-pull seat (6), and sliding rails on the rolling mill base (1) are sleeved on the sliding grooves (61).

8. The lead screw push-pull mechanism of the three-roller star-shaped precision rolling mill according to any one of claims 1 to 7, characterized in that the number of the draw hooks (9) connected to the push-pull seat (6) is two, and the two draw hooks (9) are hinged with the push-pull seat (6) through a rotating shaft.

9. The lead screw push-pull mechanism of the three-roller star-shaped precision rolling mill according to claim 8, characterized in that a stabilizer bar (91) is connected between the two drag hooks (9).

Technical Field

The invention belongs to the technical field of rolling mill push-pull mechanisms, and particularly relates to a three-roller star-shaped precision rolling mill screw rod push-pull mechanism.

Background

At present, the push-pull mechanisms of three-roller star precision rolling mills on the rolling line of industrial steel mills are commonly used as hydraulic push-pull mechanisms and chain push-pull mechanisms.

The hydraulic push-pull structure pushes a piston rod through hydraulic oil in a hydraulic cylinder, and a rolling mill push-pull seat connected with the piston rod realizes the pushing and pulling of the three-roller star-shaped precision rolling mill. The three-roller star-shaped precision rolling mill has longer propelling and pulling-out stroke, so the device has larger and longer overall dimension and larger space for field installation and use; meanwhile, oil leakage often occurs in the using process, the environment is seriously polluted, the maintenance period is too frequent, the production is seriously influenced, and the productivity is influenced.

The chain push-pull mechanism drives the chain to transmit through the chain wheel, and the chain is connected with the rolling mill push-pull seat through the bolt, so that the three-roller star-shaped precision rolling mill is pushed and pulled out. The device has poor transmission stability and positioning accuracy, and can generate additional dynamic load, vibration, impact and noise during operation, and simultaneously, when the rolling mill is pushed and pulled in place, the chain still moves forwards; in the use process, the chain is exposed in the base, so that potential safety hazards exist.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to provide a lead screw pushing and pulling mechanism of a three-roller star-shaped precision rolling mill, which has accurate transmission and small space requirement.

The technical scheme adopted by the invention is as follows:

a three-roller star-shaped precision rolling mill screw rod push-pull mechanism comprises a mounting plate mounted on a rolling mill base, wherein a plurality of driving mechanisms are mounted on the mounting plate, each driving mechanism is provided with a plurality of output ends, the output ends of the driving mechanisms are connected with transmission screw rods, the other ends of the transmission screw rods are rotatably connected with supporting seats, and the supporting seats are mounted on the rolling mill base; the rolling mill base is connected with the rolling mill base in a sliding mode, the push-pull seat is connected with a plurality of nuts, the nuts are in threaded connection with the transmission screw rod, and the push-pull seat is connected with a drag hook used for pulling the rolling mill. When the driving mechanism drives the transmission screw rod to rotate, the nut moves linearly under the driving of the transmission screw rod, and the push-pull seat moves linearly correspondingly. Therefore, the driving mechanism drives the push-pull seat to move, and the draw hook on the push-pull seat can push the rolling mill to accurately move. The invention can accurately shift the rolling mill by the accurate transmission ratio between the transmission screw rod and the nut. Compared with the traditional hydraulic push-pull mechanism and chain push-pull mechanism, the invention has more accurate transmission and correspondingly higher stability when the draw hook moves. And the push-pull seat is connected with the rolling mill base in a sliding manner, so that the stability of the draw hook during movement can be further improved.

As a preferred scheme of the invention, the driving mechanism comprises a speed reducer, the speed reducer is mounted on the mounting plate, the transmission screw rod is connected to the output end of the speed reducer, the input end of the speed reducer is connected with a coupler, the other end of the coupler is connected with a motor, and a fixing support is connected between the motor and the speed reducer.

As the preferred scheme of the invention, the motor is a servo speed reducing motor, and a position sensor is arranged at the installation position of the rolling mill base; the intelligent control system is electrically connected with the servo speed reducing motor and the position sensor respectively. The intelligent control system realizes the accurate rotation of the transmission screw rod by controlling the servo speed reducing motor. The rolling mill mounting position of rolling mill base can set up position sensor, then position sensor can give intelligent control system with the signal transmission that targets in place, and then intelligent control system can in time control servo gear motor and shut down, then the accurate rolling mill of three-roller star type can be pushed and pulled to accurate position, improves installation accuracy and operation convenience.

As a preferable scheme of the invention, the speed reducer comprises a speed reducer shell, the speed reducer shell is connected to the mounting plate, and the fixing support is connected with the speed reducer shell; one end of the transmission screw rod, which is far away from the supporting seat, is rotatably connected in the speed reducer shell, and the output end of the coupler is connected with one of the transmission screw rods.

As a preferable scheme of the invention, the number of the transmission screw rods is at least two, the transmission screw rods are provided with driving gears, reversing gears are meshed between the driving gears of two adjacent transmission screw rods, the reversing gears are rotationally connected with fixed shafts, and the fixed shafts are connected in the speed reducer shell.

As a preferable scheme of the invention, the number of the transmission screw rods connected in the speed reducer is two. The two transmission screw rods can block the push-pull seat from rotating, and the stability of the draw hook during moving is further improved by enabling the push-pull seat to be in sliding connection with the rolling mill base.

As a preferable scheme of the invention, sliding grooves are arranged on two sides of the push-pull seat, and sliding rails on a rolling mill base are sleeved on the sliding grooves. The sliding rail of the rolling mill base is sleeved in the sliding groove of the push-pull seat to limit the rotation of the nut, and the push-pull seat can also stably move when the number of the transmission screw rods is only one.

As a preferable scheme of the invention, the number of the draw hooks connected to the push-pull seat is two, and the two draw hooks are hinged with the push-pull seat through a rotating shaft. The two draw hooks can pull different positions of the rolling mill, so that the stress of the rolling mill is more balanced, and the rolling mill moves more stably.

As a preferable scheme of the invention, a stabilizer bar is connected between the two drag hooks. The stabilizer bar can improve the stability of two drag hooks, avoids the drag hook incline or during operation to rock.

The invention has the beneficial effects that:

1. according to the invention, the push-pull seat is connected with the rolling mill base in a sliding manner, so that the push-pull seat and the nut cannot rotate, when the driving mechanism drives the transmission screw rod to rotate, the nut moves linearly under the driving of the transmission screw rod, and the push-pull seat moves linearly correspondingly. Therefore, the driving mechanism drives the push-pull seat to move, and the draw hook on the push-pull seat can push the rolling mill to accurately move. The invention can accurately shift the rolling mill by the accurate transmission ratio between the transmission screw rod and the nut.

2. Compared with the traditional hydraulic push-pull mechanism and chain push-pull mechanism, the invention has more accurate transmission and correspondingly higher stability when the draw hook moves. And the push-pull seat is connected with the rolling mill base in a sliding manner, so that the stability of the draw hook during movement can be further improved.

3. The invention has low maintenance cost and short maintenance time. The quick-wear part is a nut made of copper, is convenient to replace and low in cost, and has higher stability compared with the traditional hydraulic push-pull mechanism and chain push-pull mechanism. When the traditional hydraulic push-pull mechanism hydraulic cylinder goes wrong, the hydraulic cylinder has larger and longer overall dimension, so that the disassembly time is longer, the disassembly is inconvenient, the space occupied by the disassembly is larger, and the cost is higher. The chain and the chain wheel of the chain push-pull mechanism are easy-to-wear parts and are easy to wear, the transmission shaft, the bearing seat, the bearing and the like are required to be disassembled and time is consumed when the chain wheel is replaced, the chain needs to be completely replaced after being worn, and the cost is high.

4. The invention occupies small space and can be applied to wider places. The traditional hydraulic cylinder must be installed outside the wire binding base frame body, and an extra large space is needed, so that the traditional hydraulic cylinder cannot be used in many occasions with limited space.

5. The invention has no pollution, energy saving and environmental protection. The invention uses the transmission screw rod for transmission, and the situations that the hydraulic cylinder of the hydraulic push-pull mechanism leaks oil and pollutes the environment seriously do not exist.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a block diagram of the assembly of the present invention with a rolling mill and mill base;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a top view of the present invention;

FIG. 5 is a schematic diagram of the structure of the reducer;

FIG. 6 is a cross-sectional view taken at K-K of FIG. 4;

FIG. 7 is a cross-sectional view taken at H-H in FIG. 4;

FIG. 8 is a schematic view of the push-pull seat and the drag hook;

FIG. 9 is a front view of the push-pull seat and the draw hook;

fig. 10 is a right side view of the push-pull seat and the drag hook.

In the figure, 1-mill base; 2-mounting a plate; 3-a drive mechanism; 4-driving a screw rod; 5-a support seat; 6-push-pull seat; 7-a nut; 8-rolling mill; 9-pulling a hook; 31-a speed reducer; 32-a coupling; 33-a motor; 34-a fixed support; 61-a chute; 91-stabilizer bar; 311-a reducer housing; 312-a drive gear; 313-a reversing gear; 314-fixed axis.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 and 2, the three-roller star-shaped precision rolling mill screw rod push-pull mechanism of the present embodiment includes a mounting plate 2 mounted on a rolling mill base 1, a plurality of driving mechanisms 3 are mounted on the mounting plate 2, the driving mechanisms 3 have a plurality of output ends, the output ends of the driving mechanisms 3 are connected with a transmission screw rod 4, the other end of the transmission screw rod 4 is connected with a supporting seat 5 through a bearing, and the supporting seat 5 is mounted on the rolling mill base 1; the rolling mill base is characterized by further comprising a push-pull seat 6, the push-pull seat 6 is in sliding connection with the rolling mill base 1, a plurality of nuts 7 are connected to the push-pull seat 6, the nuts 7 are in threaded connection with the transmission screw rod 4, and a draw hook 9 used for drawing the rolling mill 8 is connected to the push-pull seat 6.

The number of the transmission screw rods 4 may be one or more, and the present embodiment is exemplified by the case of two transmission screw rods 4. As shown in fig. 3, when only one transmission screw 4 is provided, the slide rail of the rolling mill base 1 is sleeved in the slide groove 61 of the push-pull seat 6 to limit the rotation of the nut 7, so that the draw hook 9 can also move linearly and smoothly. When the number of the transmission screw rods 4 is two, the two transmission screw rods 4 can block the push-pull seat 6 from rotating, and the stability of the pull hook 9 in moving is further improved by enabling the push-pull seat 6 to be in sliding connection with the rolling mill base 1.

When the driving mechanism 3 drives the transmission screw rod 4 to rotate, the nut 7 moves linearly under the driving of the transmission screw rod 4, and the push-pull seat 6 moves linearly correspondingly. Therefore, the driving mechanism 3 drives the push-pull seat 6 to move, and the draw hook 9 on the push-pull seat 6 can push the rolling mill 8 to move accurately. The invention can accurately displace the rolling mill 8 due to the precise transmission ratio between the transmission screw rod 4 and the nut 7. Compared with the traditional hydraulic push-pull mechanism and chain push-pull mechanism, the invention has more accurate transmission and correspondingly higher stability when the draw hook 9 moves. And the push-pull seat 6 is connected with the rolling mill base 1 in a sliding manner, so that the stability of the draw hook 9 during movement can be further improved.

The invention has low maintenance cost and short maintenance time. The nut 7 of the present invention is a trapezoidal nut 7 made of copper, and the trapezoidal nut 7 made of copper is a wearing part of the present invention. The nut 7 is convenient to replace and low in cost, and compared with a traditional hydraulic push-pull mechanism and a traditional chain push-pull mechanism, the stability is higher. When the traditional hydraulic push-pull mechanism hydraulic cylinder goes wrong, the hydraulic cylinder has larger and longer overall dimension, so that the disassembly time is longer, the disassembly is inconvenient, the space occupied by the disassembly is larger, and the cost is higher. The chain and the chain wheel of the chain push-pull mechanism are easy-to-wear parts and are easy to wear, the transmission shaft, the bearing seat, the bearing and the like are required to be disassembled and time is consumed when the chain wheel is replaced, the chain needs to be completely replaced after being worn, and the cost is high.

The traditional hydraulic cylinder must be installed outside the wire binding base frame body, and an extra large space is needed, so that the traditional hydraulic cylinder cannot be used in many occasions with limited space. The invention occupies small space and can be applied to wider places. The invention uses the transmission screw rod 4 for transmission, does not have the situations of oil leakage of a hydraulic cylinder of the hydraulic push-pull mechanism and environmental pollution when the hydraulic cylinder of the hydraulic push-pull mechanism seriously leaks oil, and is more energy-saving and environment-friendly.

Specifically, as shown in fig. 4, the driving mechanism 3 includes a speed reducer 31, the speed reducer 31 is mounted on the mounting plate 2, the transmission screw 4 is connected to an output end of the speed reducer 31, an input end of the speed reducer 31 is connected to a coupler 32, the other end of the coupler 32 is connected to a motor 33, and a fixing bracket 34 is connected between the motor 33 and the speed reducer 31. As shown in fig. 5 to 7, the speed reducer 31 includes a speed reducer housing 311, the speed reducer housing 311 is connected to the mounting plate 2, and the fixing bracket 34 is connected to the speed reducer housing 311; one end of each transmission screw rod 4, which is far away from the supporting seat 5, is rotatably connected into the speed reducer shell 311, a driving gear 312 is mounted on each transmission screw rod 4, a reversing gear 313 is meshed between the driving gears 312 of the two transmission screw rods 4, a fixed shaft 314 is arranged in each reversing gear 313 through a bearing, and the fixed shaft 314 is fixedly connected into the speed reducer shell 311; the output end of the coupling 32 is connected with one of the transmission screw rods 4.

The coupling 32 is a constant torque coupling 32, and the motor 33 is a servo reduction motor. When the automatic transmission device works, the motor 33 drives the coupler 32 to rotate, and the coupler 32 drives one of the transmission screw rods 4 to rotate. The driving gear 312 on the transmission screw 4 drives the reversing gear 313 to rotate, and the reversing gear 313 drives the driving gear 312 on the other transmission screw 4 to rotate. After reversing through the reversing gear 313, the two driving gears 312 rotate in the same direction, and the motion interference is avoided. The two driving gears 312 are the same gear, and the teeth number of the two driving gears is the same; and the tooth profiles of the two drive gears 312 must be the same since both are meshed with the reversing gear 313. Therefore, the rotation speeds of the two driving gears 312 are the same, and the two transmission screws 4 rotate in the same direction and at the same speed. When the two transmission screw rods 4 synchronously rotate, the two nuts 7 on the push-pull seat 6 synchronously and linearly move, so that the push-pull seat 6 and the drag hook 9 can stably and linearly move.

Because the motor 33 is a servo speed reducing motor, the rotating speed of the motor 33 is controlled in real time according to the actual load condition, so that the electric energy waste caused by overload use of the motor 33 is avoided, and the effects of energy conservation and environmental protection are achieved. The servo speed reducing motor can be connected with an intelligent control system, and the intelligent control system realizes the accurate rotation of the transmission screw rod 4 by controlling the servo speed reducing motor. The mounting position of the rolling mill 8 of the rolling mill base 1 can be provided with a position sensor, the position sensor can send a signal in place to an intelligent control system, the intelligent control system can control the servo speed reduction motor to stop in time, and the three-roller star-shaped precision rolling mill 8 can be pushed and pulled to an accurate position, so that the mounting precision and the operation convenience are improved.

As shown in fig. 8 to 10, in order to further improve the stability and reliability of the pulling operation of the pulling hook 9 on the rolling mill 8, the number of the pulling hooks 9 connected to the push-pull seat 6 is two, and the two pulling hooks 9 are hinged to the push-pull seat 6 through a rotating shaft; a stabilizing bar 91 is connected between the two drag hooks 9. Two drag hooks 9 can hold different positions of rolling mill 8, and then the atress of rolling mill 8 is more balanced, and rolling mill 8 removes more steadily. The stabilizer bar 91 can improve the stability of the two drag hooks 9 and avoid the deviation of the drag hooks 9 or the shaking during the work. The two draw hooks 9 are hinged with the push-pull seat 6 through a rotating shaft, so that the draw hooks 9 can rotate, and the draw hooks 9 can be conveniently connected with or disconnected from the rolling mill 8.

The working principle is as follows:

the draw hook 9 is turned down, so that the draw hook 9 hooks the pulling rod of the rolling mill 8. The motor 33 is started, the motor 33 drives the coupler 32 to rotate, and the coupler 32 drives one of the transmission screw rods 4 to rotate. The driving gear 312 on the transmission screw 4 drives the reversing gear 313 to rotate, and the reversing gear 313 drives the driving gear 312 on the other transmission screw 4 to rotate. The two transmission screw rods 4 synchronously rotate and drive the nut 7 to linearly move, and the nut 7 drives the push-pull seat 6 and the drag hook 9 to stably and linearly move. When the push-pull seat 6 moves, the sliding groove 61 of the push-pull seat 6 slides relative to the sliding rail of the rolling mill base 1, so that the moving stability of the push-pull seat 6 is ensured. After the rolling mill 8 moves to the right position, the draw hook 9 is turned upwards, the draw hook 9 is separated from the rolling mill 8, and then the rolling mill 8 is installed in place.

In order to improve the automation degree of the invention, the motor 33 is controlled by an intelligent control system, and the position sensor sends an in-place signal to the intelligent control system, so that the intelligent control system can control the servo speed reducing motor to stop in time.

The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.