阅读说明：本技术 一种双丝杆校直机的同步缓冲机构 (Synchronous buffer mechanism of double-screw straightening machine ) 是由 叶建生 何高清 钟华勇 韩春明 彭良霖 于 2019-11-07 设计创作，主要内容包括：本发明公开了一种双丝杆校直机的同步缓冲机构,双丝杆校直机的机架顶部安装有两个减速电机,每个减速电机的输出轴连接有丝杆,每个丝杆底部螺纹连接有螺母座,两个螺母座通过一个同步缓冲机构与压头主轴相连接,同步缓冲机构包括两个十字轴、一个移动滑杆,两个十字轴的第一轴前后两端分别与两个螺母座转动连接,十字轴的第二轴为内设孔道的空心轴,移动滑杆的左右两端分别穿过两个十字轴的第二轴的孔道中形成滑动连接,压头主轴顶端通过一个沿前后方向延伸的销轴与移动滑杆中部转动连接。本发明的优点：保证了双丝杆的驱动力都能最大效率地传递给压头主轴,保证了压头主轴受力均匀。(The invention discloses a synchronous buffer mechanism of a double-screw rod straightening machine, wherein two speed reducing motors are installed at the top of a rack of the double-screw rod straightening machine, an output shaft of each speed reducing motor is connected with a screw rod, a nut seat is in threaded connection with the bottom of each screw rod, the two nut seats are connected with a pressure head main shaft through a synchronous buffer mechanism, the synchronous buffer mechanism comprises two cross shafts and a movable sliding rod, the front end and the rear end of a first shaft of the two cross shafts are respectively in rotating connection with the two nut seats, a second shaft of the cross shafts is a hollow shaft with a hole channel arranged inside, the left end and the right end of the movable sliding rod respectively penetrate through the hole channels of a second shaft of the two cross shafts to form sliding connection, and the top end of the. The invention has the advantages that: the driving force of the double screw rods can be transmitted to the pressure head main shaft at the maximum efficiency, and the pressure head main shaft is uniformly stressed.)

1. The utility model provides a synchronous buffer gear of two lead screw levellers, two gear motor (2) are installed at frame (1) top of two lead screw levellers, and the vertical downwardly extending of output shaft of every gear motor (2) is connected with lead screw (4), and threaded connection has nut seat (5) bottom every lead screw (4), its characterized in that: two nut seats (5) are connected with a pressure head main shaft (10) through a synchronous buffer mechanism, the synchronous buffer mechanism comprises two cross shafts (6) and a movable sliding rod (7), each cross shaft (6) is composed of a first shaft (61) extending along the front-back direction and a second shaft (62) extending along the left-right direction, the front end and the rear end of each first shaft (61) of each cross shaft (6) are respectively rotatably connected with the two nut seats (5), the second shaft (62) of each cross shaft (6) is a hollow shaft with a hole in the inner part, the left end and the right end of each movable sliding rod (7) respectively penetrate through the holes of the second shafts (62) of the two cross shafts (6) to form sliding connection, and the top end of the pressure head main shaft (10) is rotatably connected with the middle of the movable sliding rod (7) through a pin shaft (8) extending along the front-.

2. The synchronous buffer mechanism of the double-screw rod straightening machine as claimed in claim 1, wherein: the bottom of the nut seat (5) is provided with an inverted U-shaped mounting seat (51), mounting holes are formed in front and rear side plates of the mounting seat (51), and the front end and the rear end of a first shaft (61) of the cross shaft (6) are respectively in rotating connection with the mounting holes in the front and rear side plates of the corresponding mounting seat (51).

3. The synchronous buffer mechanism of the double-screw rod straightening machine as claimed in claim 1, wherein: be equipped with outside convex spacing arch (71) on the middle section of removal slide bar (7), spacing arch (71) are located between two cross axle (6), the front and back both sides face of spacing arch (71) is vertical plane, pressure head main shaft (10) top is opened has the recess that is used for holding spacing arch (71), through round pin axle (8) pass pressure head main shaft (10) and spacing arch (71) to realize pressure head main shaft (10) and remove the rotation in slide bar (7) middle part and be connected.

4. The synchronous buffer mechanism of the double-screw rod straightening machine as claimed in claim 1, wherein: the automatic pressure head is characterized in that a protective cover (9) is arranged on the rack (1), two screw rods (4), two cross shafts (6), a movable sliding rod (7) and a pin shaft (8) are all located in the protective cover (9), two speed reducing motors (2) are located above the protective cover (9), and a pressure head main shaft (10) extends downwards from the bottom of the protective cover (9).

Technical Field

The invention relates to the technical field of straightening machines, in particular to a synchronous buffer mechanism of a double-screw rod straightening machine.

Background

The straightening machine is a detection straightening device designed for bending deformation of shaft rod products after heat treatment, and the straightening machine straightens deformed parts of the shaft rod parts by pressing down a pressure head main shaft on the straightening machine. The traditional straightener is pressed down by a main shaft of a hydraulic cylinder driving head, the pressure provided by the hydraulic cylinder driving mode is large, but the traditional straightener has the defects of high cost, unstable hydraulic system, inconvenient maintenance, large working noise and large occupied space. Later development is depending on motor drive ram main shaft to push down, considers that single motor can't satisfy the alignment pressure requirement of straightener, so often adopt the two motors to drive jointly in order to increase alignment pressure, adopts the two motors to drive the mode drive ram main shaft that the two lead screws drive jointly and push down, and two motor drive modes have with low costs, maintain simple, the fault rate is low, the working noise is little, the real-time is high, the fast advantage of response speed.

But the dual-motor drive screw rod has the problem that the two screw rods are not synchronous in driving. The main cause of this problem is due to the thread pitch error caused by the machining accuracy of the screw rod and the assembly error of the screw rod during the installation process. The asynchronous feeding of the double screw rods can not only influence the feeding amount, but also more importantly cause the driving of the single screw rods, so that the stress on the left side and the right side of the pressure head main shaft is uneven, and the single side of the pressure head main shaft is stressed. The influence finally causes that the pressure under the pressure head spindle is not large enough, and the straightening workpiece can not generate corresponding deformation, thereby influencing the straightening precision. At present, a buffer mechanical device which can solve the problem that a spindle of a driving head is driven by a single-side screw rod due to the fact that double screw rods are asynchronous does not exist.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a synchronous buffer mechanism of a double-screw rod straightening machine so as to solve the problem of uneven stress of a pressure head main shaft.

The invention is realized by the following technical scheme:

a synchronous buffer mechanism of a double-screw rod straightener is characterized in that two speed reducing motors are installed at the top of a stand of the double-screw rod straightener, an output shaft of each speed reducing motor vertically extends downwards and is connected with a screw rod, a nut seat is connected with the bottom of each screw rod in a threaded manner, the two nut seats are connected with a pressure head main shaft through a synchronous buffer mechanism, the synchronous buffer mechanism comprises two cross shafts and a movable sliding rod, the cross shafts are composed of first shafts extending along the front-back direction and second shafts extending along the left-right direction, the front ends and the back ends of the first shafts of the two cross shafts are respectively connected with the two nut seats in a rotating way, the second shaft of the cross shaft is a hollow shaft with a pore channel arranged inside, the left end and the right end of the movable slide rod respectively penetrate through the pore channels of the second shafts of the two cross shafts to form sliding connection, the top end of the pressure head main shaft is rotatably connected with the middle part of the movable sliding rod through a pin shaft extending along the front-back direction.

The bottom of the nut seat is provided with an inverted U-shaped mounting seat, mounting holes are formed in front and rear side plates of the mounting seat, and the front end and the rear end of the first shaft of the cross shaft are respectively in rotating connection with the mounting holes in the front and rear side plates of the corresponding mounting seat.

The middle section of the movable sliding rod is provided with a limiting bulge protruding outwards, the limiting bulge is located between two cross shafts, the front side face and the rear side face of the limiting bulge are vertical planes, a groove used for containing the limiting bulge is formed in the top end of the pressure head main shaft, and the pin shaft penetrates through the pressure head main shaft and the limiting bulge so as to achieve the purpose that the pressure head main shaft is connected with the middle part of the movable sliding rod in a rotating mode.

The protective cover is arranged on the rack, the two screw rods, the two cross shafts, the moving slide rod and the pin shaft are all located in the protective cover, the two speed reducing motors are located above the protective cover, and the pressure head main shaft extends downwards from the bottom of the protective cover.

Compared with the prior art, the invention has the following advantages:

the invention provides a synchronous buffer mechanism of a double-screw rod straightener, which is characterized in that a synchronous buffer mechanism consisting of two cross shafts and a movable sliding rod is arranged between two screw rods and a pressure head main shaft, the two cross shafts can respectively rotate relative to respective nut seats, and the movable sliding rod can slide along the two cross shafts. The two nut seats and the synchronous buffer mechanism are always connected and completely stressed, so that the left side and the right side of the pressure head main shaft are simultaneously in a stressed state, the driving force of the double-screw rod can be transmitted to the pressure head main shaft at the maximum efficiency, and the problem of uneven stress of the pressure head main shaft is effectively avoided.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is an enlarged view of fig. 1 at a.

Fig. 3 is a side view of the present invention.

Figure 4 is an assembly view of the synchronous damping mechanism of the present invention with a nut holder and ram spindle.

Fig. 5 is a working principle diagram of the present invention.

Reference numbers in the figures: the device comprises a machine frame 1, a speed reducing motor 2, a coupler 3, a lead screw 4, a nut seat 5, a mounting seat 51, a cross shaft 6, a first shaft 61, a second shaft 62, a movable sliding rod 7, a limiting bulge 71, a pin shaft 8, a protective cover 9 and a pressure head main shaft 10.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.

Referring to fig. 1 to 4, this embodiment discloses a synchronous buffer gear of a double-screw straightener, two gear motors 2 are installed at the top of a rack 1 of the double-screw straightener, the output shaft of each gear motor 2 vertically extends downwards and is connected with a screw 4 through a coupling 3, the bottom of each screw 4 is in threaded connection with a nut seat 5, two nut seats 5 are connected with a pressure head main shaft 10 through a synchronous buffer gear, the synchronous buffer gear comprises two cross shafts 6 and a movable slide rod 7, each cross shaft 6 comprises a first shaft 61 extending along the front-back direction and a second shaft 62 extending along the left-right direction, the front and back ends of the first shaft 61 of the two cross shafts 6 are respectively connected with the two nut seats 5 in a rotating manner, and the specific connection mode is: the bottom of the nut seat 5 is provided with an inverted U-shaped mounting seat 51, the front and rear side plates of the mounting seat 51 are provided with mounting holes, and the front and rear ends of the first shaft 61 of the cross shaft 6 are respectively rotatably connected with the mounting holes on the front and rear side plates of the corresponding mounting seat 51.

The second shaft 62 of the cross shaft 6 is a hollow shaft with a pore channel arranged inside, the left end and the right end of the movable sliding rod 7 respectively penetrate through the pore channels of the second shafts 62 of the two cross shafts 6 to form sliding connection, and the top end of the pressure head main shaft 10 is rotatably connected with the middle part of the movable sliding rod 7 through a pin shaft 8 extending along the front-back direction. The advantage of using cross 6 in this embodiment is: the rotary connection between the cross shaft 6 and the corresponding nut seat 5 and the sliding connection between the movable sliding rod 7 and the two cross shafts 6 are ensured, the structure of the whole mechanism is simplified, and the space is saved.

The middle section of the movable slide bar 7 is provided with a limiting bulge 71 protruding outwards, the limiting bulge 71 is positioned between the two cross shafts 6, the front side surface and the rear side surface of the limiting bulge 71 are vertical planes, the top end of the pressure head main shaft 10 is provided with a groove for accommodating the limiting bulge 71, and the pressure head main shaft 10 and the limiting bulge 71 penetrate through the pin shaft 8, so that the pressure head main shaft 10 is rotatably connected with the middle part of the movable slide bar 7.

A protective cover 9 is arranged on the rack 1, the two screw rods 4, the two cross shafts 6, the movable sliding rod 7 and the pin shaft 8 are all positioned in the protective cover 9, the two speed reducing motors 2 are positioned above the protective cover 9, and the pressure head main shaft 10 extends downwards from the bottom of the protective cover 9.

Referring to fig. 5, in operation, when the two speed reducing motors 2 receive signals to rotate, the two speed reducing motors drive the two screw rods 4 to rotate through the couplers 3 respectively, and the nut seats 5 move up and down along with the rotation of the screw rods 4. When the two screw rods 4 rotate by the same angle due to the manufacturing error and the installation error of the screw pitches of the screw rods 4, the up-and-down displacement of the two nut seats 5 is different. At this time, the two nut seats 5 will drive the corresponding cross shafts 6 to move up and down in the same way. The difference in height of the two nut seats 5 causes a difference in height of the two cross shafts 6, because the left end and the right end of the movable slide rod 7 are respectively connected with the pore channels of the second shafts 62 of the two cross shafts 6 in a sliding way, the two cross shafts 6 can respectively rotate with the respective nut seats 5, thereby driving the movable sliding rod 7 to rotate a certain angle around the pin shaft 8, so that the movable sliding is changed from a horizontal state to an inclined state, this allows to always maintain the connection and the complete stressing between the two nut seats 5 and the synchronous damping mechanism, and the synchronous buffer mechanism and the pressure head main shaft 10 are always connected and completely stressed, therefore, the left side and the right side of the pressure head main shaft 10 are kept in a stressed state at the same time, the driving force of the two screw rods 4 can be transmitted to the pressure head main shaft 10 at the maximum efficiency, and the problem of uneven stress of the pressure head main shaft 10 is effectively avoided.

When the pressure head main shaft 10 acts on a workpiece, the two speed reducing motors 2 receive instructions to rotate reversely, the two screw rods 4 are driven to rotate reversely, and the two screw rods 4 drive the two nut seats 5 to perform return stroke movement. The cross shaft 6 and the nut seat 5 correspondingly rotate, so that the cross shaft 6 and the movable slide rod 7 are driven to move, and finally the pressure head main shaft 10 is driven to move up to the starting point. Therefore, the action that the indenter spindle 10 is pressed down and returns to the working original point is finished, and the force of the two speed reducing motors 2 acting on the indenter spindle 10 is always maximized in the whole process.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.