Electric cylinder for servo spinning press

Abstract

An embodiment of the present invention discloses an electric cylinder for a servo spinning press, which includes a cylinder barrel. A servo motor 1 is installed at the top of the cylinder barrel through a flange. The servo motor 1 is connected to a lead screw shaft. A bearing block 1 is installed at the lower end of the flange. One end of the lead screw shaft is installed on the bearing block 1. The outside of the lead screw shaft is connected to a transfer sleeve through a nut rotation combination unit. The lower end of the transfer sleeve is connected to the top of a spline shaft. A base is installed at the bottom of the cylinder barrel. A spline rotation combination unit is installed at the lower end of the base. A hanging plate is installed on one side of the base. A transfer shaft is installed on the hanging plate. A driving wheel is installed on the transfer shaft. A driven wheel is installed on the spline rotation combination unit. The driving wheel and the driven wheel are connected by a synchronous belt. The upper end of the transfer shaft is connected to a servo motor 2. The present invention is light in weight and high in integration. A spline shaft is used to achieve linear, rotational and its composite motion. Since there are few parts assembled on the shaft, the assembly error is reduced and the inertia is small, making it easier to control the servo motor 1.

Description

Technical Field

[0001] The present invention relates to the field of servo presses, and more particularly to an electric cylinder for a servo spinning machine. Background Art

[0002] Using an electric cylinder shaft to drive the linear motion of a rotating shaft controlled by a servo motor, with the electric cylinder shaft providing linear motion and the rotating servo motor controlling the rotating shaft to perform rotational motion, the overall volume is large. The entire set of components of the rotating servo motor is connected to the electric cylinder shaft and the guiding mechanism, with many parts, the overall structure is complex, the cost is high, and due to the relatively heavy weight of the entire set of components and large inertia, it will also have an impact on the control of the electric cylinder. For example, the servo spinning machine disclosed in the Chinese patent with the application number 201310521406X has the above-mentioned disadvantages. Summary of the Invention

[0003] The present invention provides an electric cylinder for a servo spinning machine to solve the above-mentioned disadvantages of existing servo spinning machines.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The electric cylinder for a servo spinning machine includes a cylinder barrel. A servo motor 1 is installed on the top of the cylinder barrel through a flange. The servo motor 1 is connected to a lead screw shaft. A bearing seat 1 is installed at the lower end of the flange. One end of the lead screw shaft is installed on the bearing seat 1. The other end of the lead screw shaft is located inside the cylinder barrel. The outer side of the lead screw shaft is connected to a transfer sleeve through a nut rotation combination unit. The lower end of the transfer sleeve is connected to the top of a spline shaft. A base is installed at the bottom of the cylinder barrel. A spline rotation combination unit is installed at the lower end of the base. The spline shaft passes through the spline rotation combination unit. A hanging plate is installed on one side of the base. A transfer shaft is installed on the hanging plate. A driving wheel is installed on the transfer shaft. A driven wheel is installed on the spline rotation combination unit. The driving wheel and the driven wheel are connected by a synchronous belt. The upper end of the transfer shaft is connected to a speed reducer. The speed reducer is connected to a servo motor 2.

[0006] Preferably, a pressure sensor is installed between the flange and the cylinder barrel. A motor flange is installed between the flange and the servo motor 1. A bearing 1 is installed inside the bearing seat 1. A bearing pressing plate 1 is installed at the end of the bearing seat 1.

[0007] Preferably, the nut rotation combination unit includes an inner nut seat and an outer nut seat. The outer nut seat is connected to the top of the transfer sleeve. Steel balls are provided between the inner nut seat and the outer nut seat. The inner nut seat is connected to the lead screw shaft.

[0008] Preferably, the spline rotation combination unit includes an inner spline shaft and an outer spline shaft. The outer spline shaft is connected to the base. Steel balls are provided between the inner spline shaft and the outer spline shaft. The spline shaft passes through the inner spline shaft.

[0009] Preferably, a bottom plate is installed on the hanging plate. The end of the cylinder barrel is installed on the bottom plate.

[0010] Preferably, an adjustment plate is installed on the hanging plate, a reducer flange is installed on the adjustment plate, the reducer is installed on the reducer flange, a limit seat is installed in the reducer flange, a second bearing is provided between the reducer flange and the limit seat, and a third bearing is provided between the limit seat and the adapter shaft.

[0011] Preferably, the torque sensor is mounted on the reducer flange and the limit seat, and the upper end of the adapter shaft is connected to the torque sensor.

[0012] Preferably, a fixing seat is installed on one side of the hanging plate, and the side surface of the adjustment plate is connected to the fixing seat by bolts.

[0013] Preferably, the rear end of the hanging plate and the driving wheel are both located in the dust cover.

[0014] Preferably, the output end of the reducer is connected to the adapter shaft through a coupling, the reducer is connected to the torque sensor, the coupling is located in the torque sensor, the torque sensor and the adapter shaft are connected through bearing four, the end of the torque sensor is connected to bearing pressure plate two, one end of the torque sensor is installed on a hanging plate, a fixing seat is installed on the hanging plate, and the side of the torque sensor is connected to the fixing seat by bolts.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] A spline shaft is used to achieve linear, rotational and combined motions. Since there are fewer parts assembled on the shaft, assembly errors are reduced and the inertia is small, the servo motor is easier to control.

[0017] The miniaturization of the servo spinning machine reduces the installation space required. It uses fewer parts and is light in weight. It has a high degree of integration.

[0018] The pressure (pressure sensor), displacement (primary servo motor encoder), torque (torque sensor), and angle signal (secondary servo motor encoder) during the working process can be monitored simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram from another viewing angle of an embodiment of the present invention.

[0021] Figure 3 It is a cross-sectional view of an embodiment of the present invention.

[0022] Figure 4 It is a partial schematic diagram of a nut rotating assembly unit according to an embodiment of the present invention.

[0023] Figure 5 It is a partial schematic diagram of a spline rotation combination unit according to an embodiment of the present invention.

[0024] Figure 6 This is a cross-sectional view of another embodiment of the present invention. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] As shown in the figure, an electric cylinder for a servo spinning press disclosed in an embodiment of the present invention includes a cylinder barrel 1. A servo motor 1 3 is installed at the top of the cylinder barrel 1 through a flange 2. The servo motor 1 3 is connected to a lead screw shaft 4. A bearing seat 1 5 is installed at the lower end of the flange 2. One end of the lead screw shaft 4 is installed on the bearing seat 1 5. The other end of the lead screw shaft 4 is located inside the cylinder barrel 1. The outer side of the lead screw shaft 4 is connected to a transfer sleeve 8 through a nut rotation combination unit 7. The lower end of the transfer sleeve 8 is connected to the top of a spline shaft 6. A base 9 is installed at the bottom of the cylinder barrel 1. A spline rotation combination unit 10 is installed at the lower end of the base 9. The spline shaft 6 passes through the spline rotation combination unit 10. A hanging plate 11 is installed on one side of the base 9. A transfer shaft 12 is installed on the hanging plate 11. A driving wheel 13 is installed on the transfer shaft 12. A driven wheel 14 is installed on the spline rotation combination unit 10. The driving wheel 13 and the driven wheel 14 are connected by a synchronous belt 15. The upper end of the transfer shaft 12 is connected to a speed reducer 16. The speed reducer 16 is connected to a servo motor 2 17.

[0027] The servo motor 1 3 drives the lead screw shaft 4 to rotate. The lead screw shaft 4 drives the nut rotation combination unit to move linearly. The nut rotation combination unit 7 pushes the spline shaft 6 to move linearly.

[0028] The servo motor 2 17 drives the transfer shaft 12 to rotate. The transfer shaft 12 drives the driving wheel to rotate. The driving wheel drives the driven wheel 14 to rotate. The driven wheel drives the spline rotation combination unit 10 to rotate. The spline rotation combination unit 10 drives the spline shaft 6 to rotate. Due to the special structure of the spline shaft 6 in the present invention, the following three motions are realized by using two servo motors:

[0029] 1) The spline shaft only makes a linear motion;

[0030] 2) The spline shaft only makes a rotational motion;

[0031] 3) The spline shaft makes a compound motion, that is, makes a rotational motion while making a linear motion.

[0032] In an embodiment of the present invention, a pressure sensor 18 is installed between the flange 2 and the cylinder barrel 1, a motor flange 19 is installed between the flange 2 and the servo motor 3, a bearing 20 is installed inside the bearing housing 5, and a bearing pressing plate 21 is installed at the end of the bearing housing 5. The pressure sensor 18 outputs a pressure signal.

[0033] In an embodiment of the present invention, the nut rotation combination unit 7 includes a nut seat inner ring 71 and a nut seat outer ring 72. The nut seat outer ring 72 is connected to the top of the adapter sleeve 8. Steel balls 22 are provided between the nut seat inner ring 71 and the nut seat outer ring 72, and the nut seat inner ring 71 is connected to the lead screw shaft 4. The nut rotation combination unit 7 drives the spline shaft 6 to move linearly.

[0034] In an embodiment of the present invention, the spline rotation combination unit 10 includes a spline shaft inner ring 101 and a spline shaft outer ring 102. The spline shaft outer ring 102 is connected to the base 9. Steel balls 22 are provided between the spline shaft inner ring 101 and the spline shaft outer ring 102, and the spline shaft 6 passes through the spline shaft inner ring 101. The spline rotation combination unit 10 drives the spline shaft 6 to rotate.

[0035] In an embodiment of the present invention, a bottom plate 23 is installed on the hanging plate 11, and the end of the cylinder barrel 1 is installed on the bottom plate 23.

[0036] In an embodiment of the present invention, an adjusting plate 24 is installed on the hanging plate 11, a reducer flange 25 is installed on the adjusting plate 24, the reducer 16 is installed on the reducer flange 25, a limit seat 26 is installed inside the reducer flange 25, a bearing 27 is provided between the reducer flange 25 and the limit seat 26, and a bearing 28 is provided between the limit seat 26 and the adapter shaft 12.

[0037] In an embodiment of the present invention, a torque sensor 29 is installed on the reducer flange 25 and the limit seat 26, and the upper end of the adapter shaft 12 is connected to the torque sensor 29. The torque sensor 29 is used to measure torque.

[0038] In an embodiment of the present invention, a fixing seat 30 is installed on one side of the hanging plate 11, and the side surface of the adjusting plate is connected to the fixing seat 30 by bolts. The base 9 is used to install the entire electric cylinder.

[0039] In an embodiment of the present invention, the rear end of the hanging plate and the driving wheel are both located inside the dustproof cover 31. The dustproof cover 31 plays a dustproof role and improves the service life.

[0040] As Figure 6As shown, in another embodiment of the present invention, the output end of the speed reducer 16 is connected to the adapter shaft 12 through a coupling 32. The speed reducer 16 is connected to a torque sensor 33. The coupling 32 is located inside the torque sensor 33. The structure of the torque sensor 33 in this embodiment is different from that in other embodiments, and the precision is also different. The torque sensor 33 is connected to the adapter shaft 12 through a bearing four 34. The end of the torque sensor 33 is connected to a bearing pressure plate two 35. One end of the torque sensor 33 is installed on the hanging plate 11. A fixing seat 30 is installed on the hanging plate 11. The side of the torque sensor 33 is connected to the fixing seat 30 through bolts. The structure of torque measurement here is different from that of the previous embodiment, mainly reflected in the torque sensor 33, and the structure and installation method of the torque sensor 33 are different. Specifically, it can be selected according to the usage requirements.

[0041] The above content is only an example and description of the structure of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar methods to replace them. As long as they do not deviate from the structure of the present invention or exceed the scope defined by this claim book, they should all fall within the protection scope of the present invention.

Claims

1. Electric cylinder for servo spinning press, characterized in that: It includes a cylinder barrel. A servo motor 1 is installed at the top of the cylinder barrel through a flange. The servo motor 1 is connected to a lead screw shaft. A bearing block 1 is installed at the lower end of the flange. One end of the lead screw shaft is installed on the bearing block 1. The other end of the lead screw shaft is located inside the cylinder barrel. The outer side of the lead screw shaft is connected to a transfer sleeve through a nut rotation combination unit. The lower end of the transfer sleeve is connected to the top of a spline shaft. The bottom of the cylinder barrel is installed with a base. A spline rotation combination unit is installed at the lower end of the base. The spline shaft passes through the spline rotation combination unit. A hanging plate is installed on one side of the base. A transfer shaft is installed on the hanging plate. A driving wheel is installed on the transfer shaft. A driven wheel is installed on the spline rotation combination unit. The driving wheel and the driven wheel are connected by a synchronous belt. The upper end of the transfer shaft is connected to a reducer. The reducer is connected to a servo motor 2. The nut rotation combination unit includes a nut seat inner ring and a nut seat outer ring. The nut seat outer ring is connected to the top of the transfer sleeve. Steel balls are provided between the nut seat inner ring and the nut seat outer ring. The nut seat inner ring is connected to the lead screw shaft. The spline rotation combination unit includes a spline shaft inner ring and a spline shaft outer ring. The spline shaft outer ring is connected to the base. Steel balls are provided between the spline shaft inner ring and the spline shaft outer ring. The spline shaft passes through the spline shaft inner ring.

2. The electric cylinder for a servo spinning press according to claim 1, wherein: A pressure sensor is installed between the flange and the cylinder barrel. A motor flange is installed between the flange and the servo motor 1. A bearing 1 is installed inside the bearing block 1. A bearing pressure plate 1 is installed at the end of the bearing block 1.

3. The electric cylinder for a servo spinning press according to claim 1, characterized in that: A bottom plate is installed on the hanging plate. The end of the cylinder barrel is installed on the bottom plate.

4. The electric cylinder for a servo spinning press according to claim 1, characterized in that: An adjusting plate is installed on the hanging plate. A reducer flange is installed on the adjusting plate. The reducer is installed on the reducer flange. A limit seat is installed inside the reducer flange. A bearing 2 is provided between the reducer flange and the limit seat. A bearing 3 is provided between the limit seat and the transfer shaft.

5. The electric cylinder for a servo spinning press according to claim 4, characterized in that: A torque sensor is installed on the reducer flange and the limit seat. The upper end of the transfer shaft is connected to the torque sensor.

6. The electric cylinder for a servo spinning press according to claim 4, characterized in that: A fixing seat is installed on one side of the hanging plate. The side surface of the adjusting plate is connected to the fixing seat through bolts.

7. The electric cylinder for a servo spinning press according to claim 1, characterized in that: The rear end of the hanging plate and the driving wheel are both located inside a dust-proof cover.

8. The electric cylinder for a servo spinning press according to claim 1, characterized in that: The output end of the reducer is connected to the transfer shaft through a coupling. The reducer is connected to the torque sensor. The coupling is located inside the torque sensor. The torque sensor is connected to the transfer shaft through a bearing 4. The end of the torque sensor is connected to a bearing pressure plate 2. One end of the torque sensor is installed on the hanging plate. A fixing seat is installed on the hanging plate. The side surface of the torque sensor is connected to the fixing seat through bolts.

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