WO2019095342A1 - Ball lead screw locking mechanism for press - Google Patents
Ball lead screw locking mechanism for press Download PDFInfo
- Publication number
- WO2019095342A1 WO2019095342A1 PCT/CN2017/111766 CN2017111766W WO2019095342A1 WO 2019095342 A1 WO2019095342 A1 WO 2019095342A1 CN 2017111766 W CN2017111766 W CN 2017111766W WO 2019095342 A1 WO2019095342 A1 WO 2019095342A1
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- WIPO (PCT)
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- hydraulic cylinder
- connecting rod
- piston
- cylinder
- locking mechanism
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/18—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means
Definitions
- the invention relates to a mechanical press, in particular to a mechanical press ball head screw locking mechanism, and belongs to the technical field of mechanical presses.
- the ball screw of the press is connected with the connecting rod through the threaded joint, and the connecting rod transmits the power to the slider through the ball screw to work. Due to the impact force in the work, the ball head is A ball screw locking device is provided between the connection with the connecting rod to prevent the position change due to looseness, and the resulting quality and safety accidents.
- the press The ball screw and the connecting rod should also be easily adjusted.
- the existing locking mechanism has different structure and method principles, there is generally a defect that the locking effect is not ideal. After the press is operated for a long time, there is more or less loose connection between the ball screw and the connecting rod. The condition, as well as the resulting quality and safety accidents, and the existing locking mechanisms generally have the drawback of being inconvenient to adjust.
- the object of the present invention is to provide a new type of press ball head screw locking device, which has the advantages of reasonable structure, large locking force, locking and loose adjustment.
- a press ball head screw locking mechanism which comprises a connecting rod 1 and is connected with the connecting rod 1 through internal and external threads.
- the ball screw 2 is characterized in that a hydraulic cylinder 3 is disposed at a portion of the connecting rod 1 near the lower end, and both ends of the hydraulic cylinder 3 are straight through openings, and the central axis of the hydraulic cylinder 3 11 and the central axis 10 of the connecting rod 1 are perpendicular to each other but do not intersect, the hydraulic cylinder 3 is penetrated in the middle position with the intermediate threaded hole 12 of the connecting rod 1, and a piston is arranged at each end of the cylinder 3 in the cylinder 3. 4.
- Each of the pistons 4 has an internal thread 13 that cooperates with the thread on the ball screw 2 at a position closest to the outer circumference of the ball screw 2, and is provided at the opening portions of the hydraulic cylinder 3 at each end.
- a small hydraulic cylinder 5 having a cylinder inner diameter smaller than the inner diameter of the cylinder 3 is installed, and the inner cavity of the small hydraulic cylinder 5 is directly communicated with the piston chamber of the hydraulic cylinder 3), and is disposed in the inner cavity of each small hydraulic cylinder 5.
- a plunger 6 is provided on the outer circumference of the end of each small hydraulic cylinder 5, and a nut 7 of a cover shape is provided by screwing. The different directions of the nut 7 of the cover shape can be rotated through the inner end surface of the nut 7. Pressing or relaxing the different states of the plunger 6 is provided on the outer circumference of the small hydraulic cylinder 5 The shape of the locking cap nut 8 of the lock nut 7.
- the working principle of the invention is: tightening the nut 7 of the cover shape, so that the nut 7 of the cover shape pushes the plunger 6 to compress the hydraulic oil in the inner cavity of the small hydraulic cylinder 5, since the bottom of the small hydraulic cylinder 5 is the same as the hydraulic cylinder 3.
- the inner cavity is directly communicated, and the cylinder diameter of the hydraulic cylinder 3 is larger than the cylinder diameter of the small hydraulic cylinder 5, so the thrust generated by the piston 4 is the multiple of the thrust generated on the plunger 6 multiplied by the area ratio of the two, due to the piston 4
- the internal thread 13 is engaged with the thread on the screw 2, so that the screw 2 is locked in the internally threaded hole of the connecting rod 1.
- the present invention combines hydraulic cylinders having different cylinder diameters and diameters to form a hydraulic pressure boosting mechanism, which not only has a reasonable and simple structure, but also can generate a large force with a small force, and has the advantages of better locking effect. .
- Figure 1 is a schematic structural view of the present invention
- Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
- Figure 3 is a perspective view of the piston described in the present invention.
- the figure shows: 1 is the connecting rod, 2 is the screw rod, 3 is the hydraulic cylinder, 4 is the piston, 5 is the small hydraulic cylinder, 6 is the plunger, 7 is the nut of the cover shape, 8 is the lock nut, 9 is The hydraulic oil 10 is the central axis of the connecting rod 1 and 11 is the central axis of the hydraulic cylinder 3.
- a specific embodiment of the present invention is:
- a press ball head screw locking mechanism comprising a connecting rod 1 and a ball screw 2 connected to the connecting rod 1 through internal and external threads, wherein: the connecting rod 1 is arranged near the lower end There is a hydraulic cylinder 3, the two ends of the hydraulic cylinder 3 are straight through openings, and the central axis 11 of the hydraulic cylinder 3 and the central axis 10 of the connecting rod 1 are perpendicular to each other but do not intersect, and the hydraulic cylinder 3 is The middle position is continuous with the intermediate threaded hole 12 of the connecting rod 1, and a piston 4 is disposed at each end of the cylinder 3 of the hydraulic cylinder 3, and each piston 4 is in the closest position to the outer circular surface of the ball screw 2 There is an internal thread 13 which cooperates with the thread on the ball screw 2, and a small hydraulic cylinder 5 having an inner diameter smaller than the inner diameter of the cylinder 3 of the cylinder 3 is disposed at an opening portion at both ends of the hydraulic cylinder 3, which is small The inner cavity of the hydraulic cylinder 5 is in direct communication with the piston chamber
- a nut 7 having a lid shape is provided, and the different directions of the nut 7 of the lid shape can be rotated.
- the inner end surface of the nut 7 presses or relaxes the different state of the plunger 6, and is disposed on the outer circumference of the small hydraulic cylinder 5
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Actuator (AREA)
Abstract
A ball lead screw locking mechanism for a press, characterized in that: a through-open hydraulic cylinder (3) is disposed on a connecting rod (1) at the part close to a lower end; the middle position of the hydraulic cylinder (3) communicates with a middle threaded hole (12) of the connecting rod (1); two ends in a cylinder body of the hydraulic cylinder (3) are each provided with a piston (4); inner threaded teeth (13) fitted with threads on a ball lead screw (2) are formed on each piston (4) at the position closest to the outer peripheral surface of the ball lead screw (2); opening parts at two ends of the hydraulic cylinder (3) are each provided with a small hydraulic cylinder (5), of which a cylinder body has an inner diameter smaller than the cylinder body of the hydraulic cylinder (3); the inner cavity of each small hydraulic cylinder (5) directly communicates with a piston cavity of the hydraulic cylinder (3); a cap-shaped nut (7) is provided at an end part of each small hydraulic cylinder (5) on the outer circle in a threaded fitting mode; and by rotating the cap-shaped nut (7) in different directions, a plunger piston (6) can be pushed or loosen into different states by means of an inner end surface of the nut (7). The locking mechanism is reasonable and simple in structure, can generate a relatively great force with a relatively small force, and has the advantage of good locking effect.
Description
本发明涉及机械压力机，具体涉及机械压力机球头丝杆锁紧机构，属于机械压力机技术领域。The invention relates to a mechanical press, in particular to a mechanical press ball head screw locking mechanism, and belongs to the technical field of mechanical presses.
众所周知：压力机的球头丝杠通过螺纹配合的与连杆的相连接，连杆将动力通过球头丝杆传递给滑块进行工作，由于工作中所承受的冲击力巨大，所以，球头与连杆的连接之间、都要设置球头丝杆锁紧装置，防止因为松动造成位置的变换，以及由此造成的质量以及安全方面的事故，此外，为了适应不同的工作内容，压力机的球头丝杆与连杆之间还应该方便调节。It is well known that the ball screw of the press is connected with the connecting rod through the threaded joint, and the connecting rod transmits the power to the slider through the ball screw to work. Due to the impact force in the work, the ball head is A ball screw locking device is provided between the connection with the connecting rod to prevent the position change due to looseness, and the resulting quality and safety accidents. In addition, in order to adapt to different work contents, the press The ball screw and the connecting rod should also be easily adjusted.
现有的锁紧机构尽管结构以及方法原理不尽相同，但一般存在锁紧效果不理想的缺陷，压力机长时间工作后，或多或少还会存在球头丝杆与连杆之间连接松动的状况，以及由此造成了质量以及安全方面的事故，并且现有的锁紧机构一般还存在调节不太方便的缺陷。Although the existing locking mechanism has different structure and method principles, there is generally a defect that the locking effect is not ideal. After the press is operated for a long time, there is more or less loose connection between the ball screw and the connecting rod. The condition, as well as the resulting quality and safety accidents, and the existing locking mechanisms generally have the drawback of being inconvenient to adjust.
发明内容Summary of the invention
本发明的目的在于：提供一种新型的压力机球头丝杆锁紧装置，该种锁紧装置具有结构合理，锁紧力量较大、锁紧以及放松调节都比较方便的优点。The object of the present invention is to provide a new type of press ball head screw locking device, which has the advantages of reasonable structure, large locking force, locking and loose adjustment.
本发明实现上述目的所采用的技术方案是：所述的一种压力机球头丝杆锁紧机构，它包括连杆1以及与连杆1通过内外螺纹相连接的
球头丝杆2，其特征在于：在所述的连杆1靠近下端的部位设置有液压缸3，所述的液压缸3的两端为直通的开口，所述的液压缸3的中心轴线11与连杆1的中心轴线10相互垂直但不相交，所述的液压缸3在中部位置与连杆1的中间螺纹孔12相贯通，在液压缸3缸体内的两端各设置一个活塞4，每一个活塞4在与球头丝杆2外圆面最接近的地方、制有与球头丝杆2上螺纹相互配合的内螺纹牙13，在液压缸3两端的开口部、各设置安装一个缸体内径小于液压缸3缸体内径的小液压缸5，所述的小液压缸5的内腔与液压缸3)的活塞腔直接相通，在每一个小液压缸5的内腔设置有柱塞6，在每一个小液压缸5的端部外圆上、通过螺纹配合的方式设置有盖子形状的螺母7,旋转盖子形状的螺母7的不同方向，就可以通过螺母7的内端面顶压或放松柱塞6的不同状态，在小液压缸5的外圆上设置有用于锁紧盖子形状的螺母7的锁紧螺母8。The technical solution adopted by the present invention to achieve the above object is: a press ball head screw locking mechanism, which comprises a connecting rod 1 and is connected with the connecting rod 1 through internal and external threads.
The ball screw 2 is characterized in that a hydraulic cylinder 3 is disposed at a portion of the connecting rod 1 near the lower end, and both ends of the hydraulic cylinder 3 are straight through openings, and the central axis of the hydraulic cylinder 3 11 and the central axis 10 of the connecting rod 1 are perpendicular to each other but do not intersect, the hydraulic cylinder 3 is penetrated in the middle position with the intermediate threaded hole 12 of the connecting rod 1, and a piston is arranged at each end of the cylinder 3 in the cylinder 3. 4. Each of the pistons 4 has an internal thread 13 that cooperates with the thread on the ball screw 2 at a position closest to the outer circumference of the ball screw 2, and is provided at the opening portions of the hydraulic cylinder 3 at each end. A small hydraulic cylinder 5 having a cylinder inner diameter smaller than the inner diameter of the cylinder 3 is installed, and the inner cavity of the small hydraulic cylinder 5 is directly communicated with the piston chamber of the hydraulic cylinder 3), and is disposed in the inner cavity of each small hydraulic cylinder 5. A plunger 6 is provided on the outer circumference of the end of each small hydraulic cylinder 5, and a nut 7 of a cover shape is provided by screwing. The different directions of the nut 7 of the cover shape can be rotated through the inner end surface of the nut 7. Pressing or relaxing the different states of the plunger 6 is provided on the outer circumference of the small hydraulic cylinder 5 The shape of the locking cap nut 8 of the lock nut 7.
本发明的工作原理是：拧紧盖子形状的螺母7，于是盖子形状的螺母7就推动柱塞6压缩小液压缸5内腔中的液压油，由于小液压缸5的底部是与液压缸3的内腔直接相通的，且液压缸3的缸径大于小液压缸5的缸径，所以，活塞4所产生的推力是柱塞6上产生的推力乘以两者面积比的倍数，由于活塞4上的内螺纹牙13与丝杆2上的螺纹契合在一起的，所以，就将丝杆2锁死在连杆1的内螺纹孔中。The working principle of the invention is: tightening the nut 7 of the cover shape, so that the nut 7 of the cover shape pushes the plunger 6 to compress the hydraulic oil in the inner cavity of the small hydraulic cylinder 5, since the bottom of the small hydraulic cylinder 5 is the same as the hydraulic cylinder 3. The inner cavity is directly communicated, and the cylinder diameter of the hydraulic cylinder 3 is larger than the cylinder diameter of the small hydraulic cylinder 5, so the thrust generated by the piston 4 is the multiple of the thrust generated on the plunger 6 multiplied by the area ratio of the two, due to the piston 4 The internal thread 13 is engaged with the thread on the screw 2, so that the screw 2 is locked in the internally threaded hole of the connecting rod 1.
有益效果：本发明由于将缸径直径比大小不同的液压缸串联起来，组成液压增压机构，不但结构合理简单，同时能够用较小的力量产生较大的力量，具有锁紧效果较好的优点。
Advantageous Effects: The present invention combines hydraulic cylinders having different cylinder diameters and diameters to form a hydraulic pressure boosting mechanism, which not only has a reasonable and simple structure, but also can generate a large force with a small force, and has the advantages of better locking effect. .
图1是本发明的结构原理图；Figure 1 is a schematic structural view of the present invention;
图2是图1中A-A截面图；Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
图3是本发明中所述的活塞立体图。Figure 3 is a perspective view of the piston described in the present invention.
图中所示：1是连杆、2是丝杆、3是液压缸、4是活塞、5是小液压缸、6是柱塞、7是盖子形状的螺母、8是锁紧螺母、9是液压油、10是连杆1的中心轴线、11是液压缸3的中心轴线。The figure shows: 1 is the connecting rod, 2 is the screw rod, 3 is the hydraulic cylinder, 4 is the piston, 5 is the small hydraulic cylinder, 6 is the plunger, 7 is the nut of the cover shape, 8 is the lock nut, 9 is The hydraulic oil 10 is the central axis of the connecting rod 1 and 11 is the central axis of the hydraulic cylinder 3.
结合图1、图2、图3，本发明的具体实施方式是：1 , 2, and 3, a specific embodiment of the present invention is:
一种压力机球头丝杆锁紧机构，它包括连杆1以及与连杆1通过内外螺纹相连接的球头丝杆2,其特征在于：在所述的连杆1靠近下端的部位设置有液压缸3，所述的液压缸3的两端为直通的开口，所述的液压缸3的中心轴线11与连杆1的中心轴线10相互垂直但不相交，所述的液压缸3在中部位置与连杆1的中间螺纹孔12相贯通，在液压缸3缸体内的两端各设置一个活塞4，每一个活塞4在与球头丝杆2外圆面最接近的地方、制有与球头丝杆2上螺纹相互配合的内螺纹牙13，在液压缸3两端的开口部、各设置安装一个缸体内径小于液压缸3缸体内径的小液压缸5，所述的小液压缸5的内腔与液压缸3的活塞腔直接相通，在每一个小液压缸5的内腔设置有柱塞6，在每一个小液压缸5的端部外圆上、通过螺纹配合的方式设置有盖子形状的螺母7，旋转盖子形状的螺母7的不同方向，就可以通过螺母7的内端面顶压或放松柱塞6的不同状态，在小液压缸5的外圆上设置有
用于锁紧盖子形状的螺母7的锁紧螺母8，本发明中，由于活塞4并不需要经常性地活动，液压油9最佳的选用黄油。
A press ball head screw locking mechanism, comprising a connecting rod 1 and a ball screw 2 connected to the connecting rod 1 through internal and external threads, wherein: the connecting rod 1 is arranged near the lower end There is a hydraulic cylinder 3, the two ends of the hydraulic cylinder 3 are straight through openings, and the central axis 11 of the hydraulic cylinder 3 and the central axis 10 of the connecting rod 1 are perpendicular to each other but do not intersect, and the hydraulic cylinder 3 is The middle position is continuous with the intermediate threaded hole 12 of the connecting rod 1, and a piston 4 is disposed at each end of the cylinder 3 of the hydraulic cylinder 3, and each piston 4 is in the closest position to the outer circular surface of the ball screw 2 There is an internal thread 13 which cooperates with the thread on the ball screw 2, and a small hydraulic cylinder 5 having an inner diameter smaller than the inner diameter of the cylinder 3 of the cylinder 3 is disposed at an opening portion at both ends of the hydraulic cylinder 3, which is small The inner cavity of the hydraulic cylinder 5 is in direct communication with the piston chamber of the hydraulic cylinder 3, and a plunger 6 is disposed in the inner cavity of each small hydraulic cylinder 5, and is threaded on the outer circumference of the end of each small hydraulic cylinder 5. In a manner, a nut 7 having a lid shape is provided, and the different directions of the nut 7 of the lid shape can be rotated. The inner end surface of the nut 7 presses or relaxes the different state of the plunger 6, and is disposed on the outer circumference of the small hydraulic cylinder 5
The lock nut 8 for locking the nut 7 of the cover shape, in the present invention, since the piston 4 does not need to be constantly moved, the hydraulic oil 9 is preferably selected from butter.
Claims (3)
- 一种压力机球头丝杆锁紧机构，它包括连杆(1)以及与连杆(1)通过内外螺纹相连接的球头丝杆(2)，其特征在于：在所述的连杆(1)靠近下端的部位设置有液压缸(3)，所述的液压缸(3)的两端为直通的开口，所述的液压缸(3)的中心轴线(11)与连杆(1)的中心轴线(10)相互垂直但不相交，所述的液压缸(3)在中部位置与连杆(1)的中间螺纹孔(12)相贯通，在液压缸(3)缸体内的两端各设置一个活塞(4)，每一个活塞(4)在与球头丝杆(2)外圆面最接近的地方、制有与球头丝杆(2)上螺纹相互配合的内螺纹牙(13)，在液压缸(3)两端的开口部、各设置安装一个缸体内径小于液压缸(3)缸体内径的小液压缸(5)，所述的小液压缸(5)的内腔与液压缸(3)的活塞腔直接相通，在每一个小液压缸(5)的内腔设置有柱塞(6)，在每一个小液压缸(5)的端部外圆上、通过螺纹配合的方式设置有盖子形状的螺母(7)。A press ball head screw locking mechanism comprising a connecting rod (1) and a ball screw (2) connected to the connecting rod (1) through internal and external threads, characterized in that: the connecting rod (1) A hydraulic cylinder (3) is disposed near the lower end, and both ends of the hydraulic cylinder (3) are straight-through openings, and a central axis (11) and a connecting rod of the hydraulic cylinder (3) The central axis (10) is perpendicular to each other but does not intersect, and the hydraulic cylinder (3) is in a central position with the intermediate threaded hole (12) of the connecting rod (1), in the cylinder of the hydraulic cylinder (3) A piston (4) is arranged at each end, and each piston (4) is internally threaded with the thread on the ball screw (2) at the closest position to the outer circumference of the ball screw (2). The teeth (13) are provided with a small hydraulic cylinder (5) having an inner diameter smaller than the inner diameter of the cylinder of the hydraulic cylinder (3) at the opening portions at both ends of the hydraulic cylinder (3), and the small hydraulic cylinder (5) The inner cavity is in direct communication with the piston chamber of the hydraulic cylinder (3), and a plunger (6) is arranged in the inner cavity of each small hydraulic cylinder (5), on the outer circumference of the end of each small hydraulic cylinder (5), A nut (7) having a lid shape is provided by screwing.
- 根据权利要求1所述的一种压力机球头丝杆锁紧机构，其特征在于：在小液压缸(5)的外圆上设置有用于锁紧盖子形状的螺母(7)的锁紧螺母(8)，A press ball screw locking mechanism according to claim 1, characterized in that a lock nut for locking the nut (7) of the cover shape is provided on the outer circumference of the small hydraulic cylinder (5). (8),
- 根据权利要求1所述的一种压力机球头丝杆锁紧机构，其特征在于：液压油(9)选用黄油。 A press ball head screw locking mechanism according to claim 1, wherein the hydraulic oil (9) is made of butter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711128465.5 | 2017-11-15 | ||
| CN201711128465.5A CN107877922A (en) | 2017-11-15 | 2017-11-15 | Press ball screw rod retaining mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019095342A1 true WO2019095342A1 (en) | 2019-05-23 |
Family
ID=61777174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2017/111766 WO2019095342A1 (en) | 2017-11-15 | 2017-11-18 | Ball lead screw locking mechanism for press |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107877922A (en) |
| WO (1) | WO2019095342A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111113975A (en) * | 2020-01-16 | 2020-05-08 | 广东友力智能科技有限公司 | Cold press with ball-head-shaped plunger cylinder end |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03204200A (en) * | 1989-12-28 | 1991-09-05 | Ishikawajima Harima Heavy Ind Co Ltd | Selecting device for cushion pins |
| JPH08174297A (en) * | 1994-12-27 | 1996-07-09 | Komatsu Ltd | Die height adjusting device of press |
| CN201264372Y (en) * | 2008-10-10 | 2009-07-01 | 宁波澳玛特高精冲压机床股份有限公司 | Screw thread automatic locking apparatus of punch press |
| CN201784195U (en) * | 2010-08-27 | 2011-04-06 | 佛山市顺德区荣兴锻压设备有限公司 | Device for eliminating thread clearance of connecting rod of press machine |
| CN102699847A (en) * | 2012-06-27 | 2012-10-03 | 大连四达高技术发展有限公司 | System for clamping pneumatic lock ball |
| CN103640247A (en) * | 2013-11-17 | 2014-03-19 | 苏州蓝王机床工具科技有限公司 | Locking mechanism of connecting rod and ball screw rod of press machine |
-
2017
- 2017-11-15 CN CN201711128465.5A patent/CN107877922A/en not_active Withdrawn
- 2017-11-18 WO PCT/CN2017/111766 patent/WO2019095342A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03204200A (en) * | 1989-12-28 | 1991-09-05 | Ishikawajima Harima Heavy Ind Co Ltd | Selecting device for cushion pins |
| JPH08174297A (en) * | 1994-12-27 | 1996-07-09 | Komatsu Ltd | Die height adjusting device of press |
| CN201264372Y (en) * | 2008-10-10 | 2009-07-01 | 宁波澳玛特高精冲压机床股份有限公司 | Screw thread automatic locking apparatus of punch press |
| CN201784195U (en) * | 2010-08-27 | 2011-04-06 | 佛山市顺德区荣兴锻压设备有限公司 | Device for eliminating thread clearance of connecting rod of press machine |
| CN102699847A (en) * | 2012-06-27 | 2012-10-03 | 大连四达高技术发展有限公司 | System for clamping pneumatic lock ball |
| CN103640247A (en) * | 2013-11-17 | 2014-03-19 | 苏州蓝王机床工具科技有限公司 | Locking mechanism of connecting rod and ball screw rod of press machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107877922A (en) | 2018-04-06 |
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