Safety door driving device for press machine

Abstract

The utility model discloses a safety door driving device for a press machine, and belongs to the field of press machines. According to the technical scheme, the safety door lifting device comprises a driving mechanism and lifting transmission mechanisms, the driving mechanism is connected with the lifting transmission mechanisms, the driving mechanism comprises two symmetrically-arranged output ends, each output end is connected with the corresponding lifting transmission mechanism, and the two lifting transmission mechanisms are used for being connected with a safety door. By arranging the driving mechanism comprising the two symmetrically-arranged output ends and the lifting transmission mechanism, the same pulling force can be provided for the two sides of the safety door under the action of the single driving mechanism, and the phenomenon that the safety door is unbalanced due to the pulling force of a single acting point is avoided; and meanwhile, the two-side synchronous lifting does not need to be conducted on the two sides through a spring balancer, the problems that after the spring balancer is used for conducting balance adjustment on the safety door for a long time, a guide wheel is clamped and abraded, the safety door vibrates and noise is large are solved, and the stability of the driving device in the operation process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of presses, in particular to a safety door driving device for a press. Background Art

[0002] The middle area of ​​the press is the mold operation area, which is a dangerous area. For safety reasons, safety doors are generally installed on the front and rear sides of the press to isolate the operator from the mold operation area, thereby playing a safety protection role. At present, multi-station presses are widely used in the stamping industry. Compared with conventional presses, multi-station presses have the characteristics of large column spacing, so higher requirements are placed on the safety door drive device.

[0003] The existing safety door driving mode is mainly driven by an electric hoist. The electric hoist is operated to complete the opening and closing of the safety door. However, when the distance between the press columns is large, the safety door itself has a large structural size and the deformation generated during the manufacturing process is large. The electric hoist and the safety door are connected by a single chain lifting point. Although the guide wheel can play a guiding role, it is difficult to ensure that the lifting point, the center of gravity of the safety door and the position of the electric hoist are on the same vertical line during use, which causes friction between the guide wheel and the guide rail groove, and ultimately causes the guide wheel to get stuck and wear, the safety door to vibrate, and there is a lot of noise. It may even cause known risks such as collision and damage between the press column and the slider component and the components thereon. The patent application document with publication number CN104265109A proposes a press safety door, which uses symmetrically arranged spring balancers to balance the safety door during lifting and lowering.

[0004] However, the spring balancer uses elastic force to adjust the balance of the installed door. Since the elastic force of the spring will fluctuate to a certain extent during operation, the safety door cannot be adjusted to the balanced position accurately and quickly, which will also cause friction between the guide wheel and the guide rail groove. After long-term use, there will be problems such as guide wheel jamming and wear, safety door vibration and loud noise. After long-term use, the spring elasticity will also decrease, and the ability to adjust the balance of the safety door will also be weakened accordingly. It cannot meet the requirements of high guiding accuracy, long service life, and good safety and stability of the safety door drive device of the multi-station press. Utility Model Content

[0005] The utility model provides a safety door balancing drive device for a press machine to solve the problems of guide wheel jamming and wear, safety door vibration and loud noise after long-term use of a spring balancer for adjusting the safety door balance in the prior art.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A safety door driving device for a press machine includes a driving mechanism and a lifting transmission mechanism, wherein the driving mechanism is connected to the lifting transmission mechanism, and the driving mechanism includes two symmetrically arranged output ends, each of which is connected to a lifting transmission mechanism, and the two lifting transmission mechanisms are respectively used to connect to the safety door. By providing a driving mechanism including two symmetrically arranged output ends and a lifting transmission mechanism, the same pulling force can be provided to both sides of the safety door under the action of a single driving mechanism, thereby avoiding the phenomenon of unbalanced safety door caused by the pulling force of a single action point, and at the same time, the synchronous lifting of both sides does not require the spring balancer to adjust on both sides, thereby avoiding the problems of guide wheel jamming and wear, safety door vibration and large noise after long-term use of the spring balancer to adjust the balance of the safety door, thereby improving the stability of the driving device during operation.

[0008] Preferably, the driving mechanism includes a motor mounting bracket and a double-output shaft motor, the motor mounting bracket can be fixedly mounted on the press, the double-output shaft motor is fixedly mounted on the motor mounting bracket, and the two ends of the output shaft of the double-output shaft motor are respectively connected to different lifting transmission mechanisms. By setting up the double-output shaft motor, under the action of a single driving mechanism, the same pulling force is provided to both sides of the safety door, and the pulling force and synchronization rate of both sides are the same, avoiding the time difference or pulling force difference when two lifting devices are used for lifting at the same time, thereby improving the stability of the driving device during operation.

[0009] Preferably, the lifting transmission mechanism includes a transmission shaft, a first transmission member, and a second transmission member, one end of the transmission shaft is connected to the output shaft of the double-output shaft motor, the first transmission member is fixed on the transmission shaft, the first transmission member is in transmission connection with the second transmission member, and the lower end of the second transmission member is used to connect with the safety door. By setting the transmission shaft, the first transmission member, and the second transmission member, the axial rotation of the double-output shaft motor can be converted into the lifting movement of the safety door when rotation is required.

[0010] Preferably, the first transmission member is a sprocket, and the second transmission member is a chain, the sprocket is meshed with the chain, and the lower end of the chain is used to connect the safety door. By setting the sprocket and chain, the force transmission in the transmission process can be transmitted to the safety door along the direction of the chain, avoiding the need to use a large output to lift the safety door.

[0011] Preferably, a counterweight is connected to one end of the chain away from the safety door, and the weight of the counterweight is less than the weight of the safety door. When the counterweight acts in opposition to the safety door, the force of the chain pulling up the safety door can be reduced, and the output shaft of the double-output shaft motor does not need to output a large force, thereby reducing the output power of the double-output shaft motor.

[0012] Preferably, the counterweight block is further provided with a counterweight plate, and at least one counterweight plate can be provided on the counterweight block. By providing the counterweight plate, the lifting speed of the safety door can be easily adjusted in the case of the same power double-output shaft motor by changing the number of the counterweight plates without changing the power of the double-output shaft motor.

[0013] Preferably, the drive device further includes a first detection mechanism, which includes an upper limit switch, a lower limit switch and a first limit stopper, wherein the upper limit switch and the lower limit switch can be fixedly arranged on the press at different heights in the vertical direction, and the first limit stopper is used to be arranged on the safety door to sense the upper limit switch and the lower limit switch respectively. By setting up the first detection mechanism, the rising and falling positions of the safety door can be controlled, thereby avoiding the risk of reduced safety performance caused by the difference between the safety door and the preset position during the closing and opening process.

[0014] Preferably, the driving device further comprises a second detection mechanism, the second detection mechanism comprises a travel limit switch and a second limit stopper, the travel limit switch can be fixedly arranged on the press, the travel limit switch is arranged above the upper limit switch, and the second limit stopper is used to be arranged on the safety door to sense the travel limit switch. By setting up the second detection mechanism, in the event that the upper limit switch or the first limit stopper fails, the second detection mechanism can prevent the safety door from continuing to rise, and avoid the risk of damage to the safety door caused by the safety door detaching from the press.

[0015] Preferably, the second detection mechanism is further provided with a stopper, which can be provided on the press and can abut against the upper end of the safety door. The stopper can prevent the safety door from continuously rising when the travel limit switch or the second limit stop fails, thereby avoiding the risk of damage to the safety door caused by the safety door detaching from the press.

[0016] Preferably, the drive device is also provided with a speed differential anti-drop device, two of which are symmetrically provided and can be fixedly provided on the press, and the lower end of the speed differential anti-drop device is used to connect with the safety door. By providing the speed differential anti-drop device, the risk of the safety door suddenly falling due to motor failure during the operation of the drive device can be avoided.

[0017] It can be seen from the above technical solutions that the advantages of the utility model are as follows: by setting a driving mechanism and a lifting transmission mechanism including two symmetrically arranged output ends, the same pulling force can be provided to both sides of the safety door under the action of a single driving mechanism, avoiding the phenomenon of unbalanced safety door caused by the pulling force of a single action point, and the synchronous lifting of both sides does not require the spring balancer to be adjusted on both sides, thereby avoiding the problems of guide wheel jamming and wear, safety door vibration and large noise after long-term use of the spring balancer to adjust the balance of the safety door, and improving the stability of the driving device in operation. By setting a double-output shaft motor, the same pulling force is provided to both sides of the safety door under the action of a single driving mechanism, and the pulling force and synchronization rate on both sides are the same, avoiding the time difference or pulling force difference when two lifting devices are used to lift at the same time, and improving the stability of the driving device in operation. By setting the transmission shaft, the first transmission member and the second transmission member, the axial rotation of the double-output shaft motor can be converted into the lifting movement of the safety door when rotation is required. By setting the sprocket and chain, the force transmission in the transmission process can be transmitted to the safety door along the direction of the chain, avoiding the need to use a larger output to lift the safety door. By setting the counterweight block and the safety door in the case of an opposite force, the force of the chain pulling up the safety door can be reduced, and the output shaft of the double-output shaft motor does not need to output a large force, thereby reducing the output power of the double-output shaft motor. By setting the counterweight plate, without changing the power of the double-output shaft motor, by changing the number of counterweight plates, it is easy to adjust the change of the lifting speed of the safety door in the case of the same power double-output shaft motor. By setting the first detection mechanism, the rising and falling positions of the safety door can be controlled, avoiding the risk of reduced safety performance caused by the difference between the safety door and the preset position during the closing and opening process. By setting the second detection mechanism, when the upper limit switch or the first limit stopper fails, the second detection mechanism can avoid the continuous rise of the safety door and avoid the risk of damage to the safety door caused by the safety door detaching from the press. By setting the block, when the travel limit switch or the second limit stopper fails, the continuous rise of the safety door can be avoided, avoiding the risk of damage to the safety door caused by the safety door detaching from the press. By setting the speed difference anti-drop device, the risk of sudden drop of the safety door caused by motor failure during the operation of the drive device can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0020] Figure 2 It is a partial structural schematic diagram of a specific implementation method of the utility model.

[0021] Figure 3 It is a partial structural diagram of the second detection mechanism of the specific implementation mode of the utility model.

[0022] Description of main reference numerals

[0023] In the figure: 100, driving mechanism; 110, motor mounting bracket; 120, double-output shaft motor; 200, lifting transmission mechanism; 210, transmission shaft; 220, sprocket; 230, chain; 240, counterweight; 250, counterweight plate; 260, bearing mounting bracket; 270, seat bearing; 280, limit block; 310, upper limit switch; 320, lower limit switch; 330, first limit stopper; 340, first switch bracket; 410, travel limit switch; 420, second limit stopper; 430, stopper; 440, second switch bracket; 500, speed difference anti-fall device; 600, safety door. DETAILED DESCRIPTION

[0024] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0025] Example:

[0026] like Figure 1-Figure 3As shown, a safety door driving device for a press machine includes a driving mechanism 100 and a lifting transmission mechanism 200. The driving mechanism 100 is connected to the lifting transmission mechanism 200. The driving mechanism 100 includes two symmetrically arranged output ends, each of which is connected to a lifting transmission mechanism 200. The two lifting transmission mechanisms 200 are respectively used to connect to a safety door 600. In this embodiment, the driving mechanism 100 includes a motor mounting bracket 110 and a double-output shaft motor 120. The motor mounting bracket 110 can be fixedly arranged on the press machine. The double-output shaft motor 120 is fixedly arranged on the motor mounting bracket 110. The two ends of the output shaft of the double-output shaft motor 120 are respectively connected to different lifting transmission mechanisms 200. In this embodiment, the lifting transmission The driving mechanism 200 includes a transmission shaft 210, a first transmission member and a second transmission member. One end of the transmission shaft 210 is connected to the output shaft of the double-output shaft motor 120, and the other end of the transmission shaft 210 is fixedly connected to the bottom bolt of the press crossbeam platform by a seat bearing 270 through a bearing mounting bracket 260. The seat bearing 270 is regularly greased; the limit block 280 is installed on the bearing mounting bracket 260 to prevent the axial movement of the transmission shaft 210 during use, thereby playing a safety protection role. The first transmission member is fixed on the transmission shaft 210, and the first transmission member is connected to the second transmission member in transmission. The lower end of the second transmission member is used to connect with the safety door 600. In this embodiment, the first transmission member is a sprocket 220, and the second transmission member is a chain 230. The sprocket 220 It is meshed with the chain 230, and the lower end of the chain 230 is used to connect the safety door 600. In addition, the first transmission member and the second transmission member can also be configured as a gear and a rack, etc., so that, through the configuration including the driving mechanism 100 with two symmetrically arranged output ends and the lifting transmission mechanism 200, it is possible to provide the same pulling force to both sides of the safety door 600 under the action of a single driving mechanism 100, thereby avoiding the imbalance of the safety door 600 caused by the pulling force of a single point of action, and at the same time, the synchronous lifting of both sides does not require the spring balancer to adjust on both sides, thereby avoiding the problems of guide wheel jamming and wear, safety door 600 vibration and loud noise after long-term use of the spring balancer to adjust the balance of the safety door 600, thereby improving the driving device during operation. In order to improve the stability of the operation, the dual-shaft motor 120 is set up, and the single driving mechanism 100 is used to provide the same pulling force to both sides of the safety door 600, and the pulling force and synchronization rate on both sides are the same, so as to avoid the time difference or pulling force difference when two lifting devices are used for lifting at the same time, thereby improving the stability of the driving device during operation. By setting the transmission shaft 210, the first transmission member and the second transmission member, the axial rotation of the dual-shaft motor 120 can be converted into the lifting movement of the safety door 600 when rotation is required. By setting the sprocket 220 and the chain 230, the force transmission in the transmission process can be realized and transmitted to the safety door 600 along the direction of the chain 230, thereby avoiding the need to use a larger output to lift the safety door 600.

[0027] In this embodiment, the ends of the two chains 230 away from the safety door 600 are also connected to the same counterweight block 240, the weight of the counterweight block 240 is less than the weight of the safety door 600, and a counterweight plate 250 is also arranged on the counterweight block 240. At least one counterweight plate 250 can be arranged on the counterweight block 240. In this way, when there is an opposite force between the counterweight block 240 and the safety door 600, the force of the chain 230 to pull up the safety door 600 can be reduced, and there is no need for the output shaft of the double-output shaft motor 120 to output a large force, thereby reducing the output power of the double-output shaft motor 120, and solving the problem of difficult installation caused by the large size of the double-output shaft motor 120. By setting the counterweight plate 250, without changing the power of the double-output shaft motor 120, by changing the number of counterweight plates 250, it is possible to easily adjust the lifting speed of the safety door 600 when the double-output shaft motor 120 has the same power.

[0028] In this embodiment, the driving device further includes a first detection mechanism, which includes an upper limit switch 310, a lower limit switch 320 and a first limit stopper 330. The upper limit switch 310 and the lower limit switch 320 can be fixedly arranged on the press at different heights in the vertical direction, respectively, and the upper limit switch 310 and the lower limit switch 320 are respectively mounted on the first switch bracket 340. The first limit stopper 330 is used to be arranged on the safety door 600 and sensed by the upper limit switch 310 and the lower limit switch 320. By setting the first detection mechanism, the rising and falling positions of the safety door 600 can be controlled, avoiding the risk of reduced safety performance caused by the difference between the safety door 600 and the preset position during the closing and opening process.

[0029] In this embodiment, the drive device also includes a second detection mechanism, which includes a travel limit switch 410 and a second limit stopper 420. The travel limit switch 410 can be fixedly set on the press and installed on the second switch bracket 440. The travel limit switch 410 is set above the upper limit switch 310. The second limit stopper 420 is used to be set on the safety door 600 and sense the travel limit switch 410. The second detection mechanism is also provided with a block 430. The block 430 can be set on the press, and the block 430 can sense the safety door 600. The upper end of the entire door 600 is abutted. By means of the second detection mechanism, when the upper limit switch 310 or the first limit stopper 330 fails, the second detection mechanism can prevent the safety door 600 from continuing to rise, and avoid the risk of damage to the safety door 600 caused by the safety door 600 being separated from the press. By means of the block 430, when the travel limit switch 410 or the second limit stopper 420 fails, the safety door 600 can be prevented from continuing to rise, and avoid the risk of damage to the safety door 600 caused by the safety door 600 being separated from the press.

[0030] In this embodiment, the driving device is also provided with a speed differential anti-fall device 500, two of which are symmetrically arranged and can be fixedly arranged on the press, and the lower end of the speed differential anti-fall device 500 is used to connect with the safety door 600. In this way, the speed differential anti-fall device 500 can be set to avoid the risk of sudden drop of the safety door 600 caused by motor failure during operation of the driving device.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A safety door driving device for a press machine, comprising a driving mechanism (100) and a lifting transmission mechanism (200), wherein the driving mechanism (100) is connected to the lifting transmission mechanism (200), characterized in that: The driving mechanism (100) comprises two symmetrically arranged output ends, each of which is connected to a lifting transmission mechanism (200), and the two lifting transmission mechanisms (200) are respectively used to be connected to the safety door (600).

2. The safety door driving device for a press machine according to claim 1, characterized in that: The driving mechanism (100) comprises a motor mounting bracket (110) and a double-output shaft motor (120); the motor mounting bracket (110) can be fixedly mounted on a press machine; the double-output shaft motor (120) is fixedly mounted on the motor mounting bracket (110); and both ends of the output shaft of the double-output shaft motor (120) are respectively connected to different lifting transmission mechanisms (200).

3. The safety door driving device for a press machine according to claim 2, characterized in that: The lifting transmission mechanism (200) comprises a transmission shaft (210), a first transmission member and a second transmission member, one end of the transmission shaft (210) is connected to the output shaft of the double-output shaft motor (120), the first transmission member is fixed on the transmission shaft (210), the first transmission member is transmission-connected to the second transmission member, and the lower end of the second transmission member is used to connect to the safety door (600).

4. The safety door driving device for a press machine according to claim 3, characterized in that: The first transmission member is a sprocket (220), and the second transmission member is a chain (230). The sprocket (220) is meshedly connected with the chain (230), and the lower end of the chain (230) is used to connect with the safety door (600).

5. The safety door driving device for a press machine according to claim 4, characterized in that: One end of the chain (230) away from the safety door (600) is also connected to a counterweight block (240), and the weight of the counterweight block (240) is less than the weight of the safety door (600).

6. The safety door driving device for a press machine according to claim 5, characterized in that: A counterweight plate (250) is also provided on the counterweight block (240), and at least one counterweight plate (250) can be provided on the counterweight block (240).

7. The safety door driving device for a press machine according to claim 1, characterized in that: The drive device further comprises a first detection mechanism, which comprises an upper limit switch (310), a lower limit switch (320) and a first limit stopper (330). The upper limit switch (310) and the lower limit switch (320) can be respectively fixedly arranged on the press at different heights in the vertical direction, and the first limit stopper (330) is used to be arranged on the safety door (600) and sense the upper limit switch (310) and the lower limit switch (320) respectively.

8. The safety door driving device for a press machine according to claim 7, characterized in that: The driving device also includes a second detection mechanism, which includes a travel limit switch (410) and a second limit stopper (420). The travel limit switch (410) can be fixedly arranged on the press machine, the travel limit switch (410) is arranged above the upper limit switch (310), and the second limit stopper (420) is used to be arranged on the safety door (600) to sense the travel limit switch (410).

9. The safety door driving device for a press machine according to claim 8, characterized in that: The second detection mechanism is also provided with a stopper (430), and the stopper (430) can be provided on the press machine, and the stopper (430) can abut against the upper end of the safety door (600).

10. The safety door driving device for a press machine according to claim 1, characterized in that: The driving device is also provided with a speed differential anti-fall device (500). Two speed differential anti-fall devices (500) are symmetrically provided and can be fixedly arranged on the press. The lower end of the speed differential anti-fall device (500) is used to be connected to the safety door (600).

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