Lifting assist device suitable for calendering apparatus

Abstract

A lifting assist device suitable for a calendering apparatus. When a foot pedal (2) is depressed, a movable pulley block and a pawl block (10) rise and drive a ratchet wheel (5) to rotate, and the ratchet wheel (5) drives a handwheel to rotate; when the foot pedal (2) is released, movable pulleys (8) and the pawl block (10) descend relative to the ratchet wheel (5) under the action of gravity, and the pawl block (10) is reset. By repeatedly depressing and releasing the foot pedal (2), a glass calender can be continuously lifted. When the glass calender is lifted into position, the lifting assist device is removed, operations such as inspection, maintenance and adjustment are performed, and finally the handwheel is rotated to lower the glass calender. Since the force of the human leg is several times that of the arm and the pulley block is used in conjunction, using the lifting assist device to drive the handwheel is much easier than rotating the handwheel by hand directly. The present invention can effectively solve the problem that current manual lifting of glass calenders is time-consuming and labor-intensive, thereby reducing the operational difficulty, increasing the lifting speed, and avoiding issues such as device failures and glass sticking to rollers caused by excessive accumulation of glass debris, and injuries resulting from improper operation.

Description

Lifting assisting device suitable for calendering equipment

[0001] The present application claims priority to the Chinese patent application No. 202411351483.X, filed on September 26, 2024, and entitled "Lifting assisting device suitable for calendering equipment", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of assisting tools, and particularly relates to a lifting assisting device suitable for calendering equipment. BACKGROUND

[0003] A glass calendering machine is a glass production equipment used for pressing molten glass into flat glass; in order to ensure the quality of the produced glass, the glass calendering machine needs to be debugged before producing different batches of glass, and needs to be regularly inspected and maintained; in order to facilitate operation, the glass calendering machine usually needs to be lifted to a certain height during the process of inspecting, maintaining and debugging the glass calendering machine.

[0004] In order to keep the glass calendering machine stable after being lifted to ensure the safety of operation, the applicant refers to the lifting structure in the feeding device disclosed in Chinese patent CN110254835A, and sets a screw rod mechanism driven by a motor beside the glass calendering machine, and a screw nut is connected with the glass calendering machine, so as to drive the glass calendering machine to lift by rotating the screw rod driven by the motor; in addition, in order to avoid the glass calendering machine stopping due to motor, control circuit failure or power failure and the like during the process of rising or falling back to position, thereby affecting the production progress and even causing production accidents, as shown in the drawing 3 of the patent specification, a driven bevel gear is further arranged on the screw rod, the driven bevel gear is engaged with a driving bevel gear, and the end of the rotating shaft of the driving bevel gear is connected with a handle wheel; when the above-mentioned situation occurs, the operator can rotate the handle wheel by hand to drive the glass calendering machine to rise or fall to position; but it is found after trial that, since the glass calendering machine is heavy, it is difficult for the operator to directly rotate the handle wheel by hand to drive the glass calendering machine to rise, which is not only laborious, but also time-consuming to realize the rising of the glass calendering machine by hand, and it is easy to cause the related equipment failure due to too much glass slag accumulation, glass sticking to the roller and injury due to improper operation and the like.

[0005] Therefore, it is necessary to design an assisting device for assisting the lifting of the glass calendering machine, to reduce the operation difficulty of manually driving the glass calendering machine to lift in the case of motor, control circuit failure or power failure and the like, to improve the rising speed, and to reduce the probability of production capacity loss and production accidents. SUMMARY

[0006] In view of the above deficiencies of the prior art, the purpose of the present application is to provide a lifting assisting device suitable for calendering equipment, which solves the technical problem of time-consuming and laborious manual driving of the glass calender and achieves the effect of reducing operation difficulty and improving quality and efficiency.

[0007] To solve the above technical problems, the present application adopts the following technical solutions:

[0008] The lifting assisting device suitable for calendering equipment comprises a rack, a pulley block arranged on the rack, the pulley block comprising a movable pulley and a flexible cable connected with the movable pulley, the movable pulley being driven to ascend by the flexible cable; a ratchet wheel rotatably connected below the movable pulley on the rack, an axially extending butt joint for driving a handle wheel to rotate being synchronously rotatably connected to the ratchet wheel; a pawl block connected with the movable pulley and synchronously ascending and descending with the movable pulley, a plurality of pawl heads adapted to the ratchet wheel being arranged on the pawl block along the length direction of the pawl block, the pawl block driving the ratchet wheel to rotate unidirectionally when the pawl block ascends with the movable pulley.

[0009] Further, the pawl block is rotatably connected with the movable pulley through a first rotating shaft, the first rotating shaft being coaxial with the ratchet wheel, the pawl block being located on one side of the ratchet wheel in the radial direction, one side of the pawl block on which the pawl heads are located facing the tooth surface of the ratchet wheel, and part of the pawl heads of the pawl block being matched with the tooth surface of the ratchet wheel and keeping the pawl block inclined in the vertical direction.

[0010] Further, the rack is provided with a downward opening, the pulley block, the pawl block and the ratchet wheel being located in the opening of the rack, the pulley block being arranged at the closed end of the rack, a support plate being transversely connected between the two side walls in the opening, and the ratchet wheel being rotatably connected with the support plate through a second rotating shaft.

[0011] Further, the butt joint comprises a connecting rod eccentrically arranged with the ratchet wheel, a butt joint sleeve being detachably arranged on the connecting rod, and the butt joint sleeve being capable of being arranged on the handle wheel.

[0012] Further, a foot pedal vertically sliding is arranged on the rack, the foot pedal being linked with the movable pulley through the flexible cable, the movable pulley ascending when the foot pedal descends, and the foot pedal ascending when the movable pulley descends.

[0013] Further, a vertical sliding groove is arranged on one side of the opening on the rack, the sliding groove being transversely penetrated to the outside of the rack, the foot pedal being slidingly connected in the sliding groove, and one end of the foot pedal extending to the outside of the rack.

[0014] Further, a guide shaft is arranged in the sliding groove close to the top of the rack, the guide shaft being coaxial with the movable pulley and rotatably connected with the rack at both ends, and one end of the flexible cable passing above the guide shaft and extending downward to be connected with the foot pedal.

[0015] Further, a handrail is connected to the upper end of the rack.

[0016] Further, the movable pulley is rotationally connected with movable supports on both axial sides, and the pawl block is located between the two movable supports and rotationally connected with the two movable supports through a first rotating shaft.

[0017] Further, the pulley block further comprises two fixed pulleys, and the two fixed pulleys and the two movable pulleys form the pulley block; the two fixed pulleys are rotationally connected with the fixed support, and the upper end of the fixed support is fixed; a footboard vertically sliding is arranged on the frame, the footboard is linked with the movable pulley through a flexible cable, the movable pulley rises when the footboard falls, and the footboard rises when the movable pulley falls; one end of the flexible cable is fixedly connected with the upper end of the movable support, and the other end of the flexible cable is sequentially wound around the fixed pulleys and the movable pulleys and then connected with the footboard.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] 1. The lifting power assisting device drives the handle wheel through the pulley block, the pawl block and the ratchet wheel, and drives the glass calender to rise through the screw rod mechanism, so that the lifting power assisting device is more comfortable to use than directly rotating the handle wheel by hand, and effectively solves the problems of time-consuming and labor-consuming in driving the glass calender to rise by manpower, reduces the operation difficulty, improves the rising speed, avoids the related equipment failure caused by too much glass slag accumulation, glass sticking to the roller and injury caused by improper operation, etc.

[0020] 2. The lifting power assisting device sets the frame into a U shape, and sets the pulley block, the pawl block and the ratchet wheel on the inner side of the frame, which not only protects these transmission components, but also effectively reduces the thickness of the lifting power assisting device, so as to adapt to the narrow operation space and improve the practicability of the lifting power assisting device. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application.

[0022] Fig. 1 is a perspective view of the lifting power assisting device according to the embodiment;

[0023] Fig. 2 is a front view of the lifting power assisting device according to the embodiment;

[0024] Fig. 3 is a structural schematic view of the pulley block used in the lifting power assisting device according to the embodiment;

[0025] The rack 1, the footboard 2, the flexible cable 3, the second rotating shaft 4, the ratchet wheel 5, the fixed pulley 6, the fixed support 7, the movable pulley 8, the movable support 9, the pawl block 10, the first rotating shaft 11, the supporting plate 12, the sliding groove 13, the guide shaft 14, the rotating plate 15, the connecting rod 16, the butt joint sleeve 17, the positioning rod 18, the handrail 19, the butt joint part 20, and the claw head 21. DETAILED DESCRIPTION

[0026] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0027] Embodiment

[0028] Please refer to FIG. 1, a lifting power assisting device suitable for a calendering equipment, comprising a rack 1, a pulley block is suspendedly arranged on the rack 1, the pulley block comprises a movable pulley 8 and a flexible cable 3 which is connected with the movable pulley 8 in a matching mode, the movable pulley 8 can be lifted by the flexible cable 3; a ratchet wheel 5 is rotatably connected below the movable pulley 8 on the rack 1, an axial extension butt joint part 20 for driving a handle wheel to rotate is synchronously rotatably connected on the ratchet wheel 5; a pawl block 10 is synchronously connected with the movable pulley 8, a plurality of claw heads 21 which are adapted to the ratchet wheel 5 are arranged on the pawl block 10 along the length direction of the pawl block 10, the pawl block 10 drives the ratchet wheel 5 to rotate in one direction when the pawl block 10 is lifted with the movable pulley 8.

[0029] The lifting assisting device is mainly provided with a screw rod mechanism beside the glass calender, and in case of motor, control circuit failure or power failure, the glass calender cannot be driven to lift by the motor driving the screw rod to rotate; in the initial state, the pawl block 10 is located below or relatively lower than the ratchet wheel 5; in use, the butt joint part 20 is first connected with the handle wheel to rotate synchronously, then the flexible cable 3 is operated to drive the movable pulley 8 to rise, the movable pulley 8 drives the pawl block 10 to rise, the pawl block 10 is buckled with the pawl head 21 and the ratchet wheel tooth, the force is transmitted to the ratchet wheel 5, the ratchet wheel 5 rotates with the pawl block 10 rising, the ratchet wheel 5 drives the handle wheel to rotate through the butt joint part 20, so that the screw rod mechanism drives the glass calender to rise; when the flexible cable 3 is loosened, the screw rod mechanism loses the driving force and is self-locked, so that the glass calender and the ratchet wheel 5 connected with the handle wheel are stationary, under the guidance of gravity and the ratchet wheel tooth to the pawl head 21 of the pawl block 10, the movable pulley 8 and the pawl block 10 fall relatively to the ratchet wheel 5, and the pawl block 10 resets; the operation of the flexible cable 3 and the loosening of the flexible cable 3 are alternately performed, so that the glass calender can be continuously lifted; after the glass calender is lifted to the position, the lifting assisting device is removed for inspection, maintenance and debugging, and finally the handle wheel is rotated to lower the glass calender; the lifting assisting device uses the movable pulley 8, is more labor-saving, and can effectively solve the problem of time-consuming and labor-consuming in driving the glass calender to rise by manpower, is favorable for reducing the operation difficulty, improving the rising speed, avoiding the related equipment failure caused by too much glass slag accumulation, glass sticking to the roller and injury caused by improper operation and the like.

[0030] Please refer to FIG. 1 and FIG. 2, the movable pulley 8 is provided with a movable support 9 on each of the two axial sides, the movable pulley 8 is rotatably connected with the two movable supports 9, the pawl block 10 is located between the two movable supports 9 and below the movable pulley 8, and the pawl block 10 is rotatably connected with the two movable supports 9 through a first rotating shaft 11; the first rotating shaft 11 is axially consistent with the ratchet wheel 5, the pawl block 10 is located on one side of the ratchet wheel 5 in the radial direction, one side of the pawl block 10 on which the pawl head 21 is located faces the tooth surface of the ratchet wheel 5, and part of the pawl head 21 of the pawl block 10 is engaged with the tooth surface of the ratchet wheel 5 and makes the pawl block 10 keep inclined in the vertical direction;

[0031] In this way, when the flexible cable 3 is loosened, the pawl block 10 is rotatably connected with the movable pulley 8, and under the guidance of gravity and the ratchet wheel tooth to the pawl head 21 of the pawl block 10, the pawl block 10 mainly reciprocates relative to the movable pulley 8, which produces the effect that the pawl block 10 repeatedly swings relative to the ratchet wheel 5, so that the pawl block 10 avoids the ratchet wheel 5 and falls; compared with the pawl block 10 and the movable pulley 8 swinging relative to the ratchet wheel 5 as a whole, the pawl block 10 falls more smoothly and quickly.

[0032] Please see FIG. 1 and FIG. 2, the rack 1 is provided with a downward U-shaped opening, the pulley block, the pawl block 10 and the ratchet wheel 5 are located in the opening of the rack 1, the pulley block is arranged at the closed end of the rack 1, the two side walls in the opening are transversely connected with the support plate 12, and the ratchet wheel 5 is rotationally connected with the support plate 12 through the second rotating shaft 4;

[0033] In this way, the rack 1 is arranged in a U shape, and the pulley block, the pawl block 10 and the ratchet wheel 5 are arranged inside the rack 1, which not only protects these transmission components, but also effectively reduces the thickness of the lifting assisting device, so as to adapt to narrow operation space and other working conditions and improve the practicability of the lifting assisting device; in the embodiment, the support plate 12 has two plates, and the ratchet wheel 5 and the pawl block 10 are arranged between the two support plates 12, which not only makes the rotation connection between the second rotating shaft 4 and the rack 1 more stable, but also restrains the pawl block 10, so as to avoid the swing of the pawl block 10 and the movable pulley 8 in the thickness direction of the lifting assisting device, which is beneficial to improve the use stability of the lifting assisting device.

[0034] Please see FIG. 1, the connecting rod 16 is arranged eccentrically with the ratchet wheel 5, and the docking sleeve 17 is detachably sleeved on the connecting rod 16; the docking sleeve 17 can be sleeved on the handle wheel; specifically, the docking part 20 further comprises a rotating plate 15 located outside the support plate 12 and rotationally connected with the second rotating shaft 4, the connecting rod 16 is arranged on the rotating plate 15 and is in the same direction as the second rotating shaft 4, the connecting rod 16 is arranged eccentrically with respect to the second rotating shaft 4, one end of the docking sleeve 17 is sleeved on the connecting rod 16, and the other end of the docking sleeve 17 is connected through the positioning rod 18 penetrating the docking sleeve 17 and the connecting rod 16 in the radial direction, so that the docking sleeve 17 moves synchronously with the connecting rod 16, and the positioning rod 18 can be a bolt; the radial distance between the connecting rod 16 and the second rotating shaft 4 should be the same as the radial distance between the handle of the handle wheel to be docked and the center of the handle wheel, and the inner diameter of the docking sleeve 17 should be the same as the diameter of the handle of the handle wheel to be docked; during use, appropriate docking sleeve 17 can be selected according to the diameter of the handle of the handle wheel, and the two ends of the docking sleeve 17 are sleeved on the connecting rod 16 and the handle of the handle wheel respectively, so that the handle wheel can rotate synchronously with the ratchet wheel 5; during implementation, the docking part 20 can also be a docking rod arranged coaxially with the ratchet wheel 5, and the free end of the docking rod is used for synchronous rotation connection with the shaft hole of the handle wheel.

[0035] Please see FIG. 1 and FIG. 2, in order to further save labor when operating the flexible cable 3, a foot pedal 2 is vertically slidably arranged on the rack 1, the foot pedal 2 is linked with the movable pulley 8 through the flexible cable 3, the movable pulley 8 rises when the foot pedal 2 descends, and the foot pedal 2 rises when the movable pulley 8 descends, and the gravity of the foot pedal 2 should be less than the pulling force of the gravity of the movable pulley 8 and the pawl block 10 acting on the free end of the flexible cable 3;

[0036] In this way, in the initial state, the foot pedal 2 is located at the upper end of the slidable range, and the pawl block 10 is located below or at the lower position of the ratchet wheel 5; in use, the downward pressure is applied to the foot pedal 2 by the foot, so as to drive the flexible cable 3 to drive the movable pulley 8 to rise; when the downward pressure applied to the foot pedal 2 is stopped, the movable pulley 8 and the pawl block 10 repeatedly swing and continuously fall relative to the ratchet wheel 5, and at the same time, the foot pedal 2 rises back to the original position; the downward pressure and the stopping of the downward pressure are alternately applied, that is, the operator can use the foot to step on the foot pedal 2 and intermittently exert force, and the foot pedal 2 rising under the action of gravity is repeatedly stepped down, so that the glass calender can be continuously lifted; since the strength of the leg is several times that of the arm, when the glass calender is lifted, the use of the lifting assisting device to drive the handle wheel is more labor-saving than directly rotating the handle wheel by hand.

[0037] Please refer to FIG. 1 and FIG. 2, the U-shaped area of the rack 1 is provided with a vertically extending sliding groove 13 on one side, the sliding groove 13 extends transversely to the outside of the rack 1, and the foot pedal 2 is slidably connected in the sliding groove 13 and can vertically slide, one end of the foot pedal 2 extends to the outside of the rack 1;

[0038] In this way, the foot pedal 2 is arranged on one side of the rack 1 in the width direction, so that the operator does not need to be located between the lifting assisting device and the glass calender or face the glass calender, which is beneficial to improve the safety of operation, and the use of the lifting assisting device has lower requirements for the space in the thickness direction, so as to adapt to the narrow operation space and other working conditions and improve the practicability of the lifting assisting device.

[0039] Please refer to FIG. 2, the sliding groove 13 is provided with a guide shaft 14 near the top of the rack 1, the guide shaft 14 is coaxial with the movable pulley 8 and is rotatably connected to the rack 1 at both ends, and one end of the flexible cable 3 passes above the guide shaft 14 and extends downward to be connected with the foot pedal 2;

[0040] In this way, the guide shaft 14 and the foot pedal 2 in the vertical sliding groove 13 are opposite in the vertical direction, the flexible cable 3 changes the direction of the free end through the guide shaft 14, the flexible cable segment connected with the foot pedal 2 extends vertically, so that the downward pressure applied to the foot pedal 2 can act on the flexible cable 3 as much as possible to drive the pulley group to move, and the lifting assisting device is more labor-saving.

[0041] Please refer to FIG. 1 and FIG. 2, the rack 1 is provided with a handrail 19 at the upper end; in this way, the handrail 19 can be used to hold the lifting assisting device by hand, so that the foot can step on the foot pedal 2 to exert force.

[0042] Please see figure 1 and figure 2, the movable pulley 8 axial two sides are respectively connected with the movable support 9, the pawl block 10 is located between two movable supports 9 and is connected with two movable supports 9 through the first rotating shaft 11, in the embodiment, the pulley block also includes the fixed pulley 6, the fixed pulley 6 and the movable pulley 8 are two respectively, two fixed pulleys 6 are connected with the fixed support 7 respectively, the upper end of the fixed support 7 is fixed, the flexible cable 3 one end is connected with the foot pedal 2, the other end is connected with the movable support 9;

[0043] In this way, as shown in figure 2 and 3, the pulley block is used by two fixed pulleys 6 and two movable pulleys 8, one end of the flexible cable 3 is fixedly connected with the upper end of the movable support 9, the other end of the flexible cable 3 is sequentially wound around each fixed pulley 6 and movable pulley 8 and then extends upward, then extends downward through the guide shaft 14 and is connected with the foot pedal 2, according to the pulley block tension calculation formula, the force (as shown by F in figure 3) acting on the flexible cable 3 through the foot pedal 2 only needs to be one fifth of the total of the gravity of the pawl block 10 and the movable pulley 8 and the force required for the pawl block 10 to drive the ratchet 5, so that the lifting assisting device is more labor-saving, which is conducive to reducing the operation difficulty and improving the speed of lifting the glass calender.

[0044] In the embodiment, the movable pulley 8 is also consistent with the axial direction of the ratchet 5; in this way, the axial direction of the pulley block corresponds to the thickness direction of the lifting assisting device, avoiding the pulley block protruding from the rack 1, which is conducive to reducing the thickness of the lifting assisting device, so as to adapt to the working conditions such as narrow operation space and improve the practicability of the lifting assisting device.

[0045] Finally, it needs to be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit the technical solutions, and those of ordinary skill in the art should understand that the technical solutions of the present application are modified or replaced equivalently without departing from the purpose and scope of the technical solutions, which should be covered in the scope of claims of the present application.

Claims

1. A lifting assist device suitable for use with a calendering apparatus, characterized by: The utility model provides a kind of lifting device, including rack, the rack is provided with pulley block, the pulley block includes movable pulley and flexible cable connected with movable pulley, the flexible cable can drive movable pulley to ascend;Rack is rotatably connected with ratchet below movable pulley, the ratchet is rotatably connected with axial extension for driving handle wheel rotation butt joint portion synchronously;Movable pulley is connected with ratchet block that is synchronous with movable pulley lifting, the ratchet block is equipped with multiple pawl head that is adapted with ratchet along its length direction interval on it, the ratchet block drives the one-way rotation of ratchet when ascending with movable pulley.

2. A lifting assist device for use with a calendering apparatus as defined in claim 1, wherein: The ratchet block and the movable pulley are rotatably connected by a first rotating shaft, the first rotating shaft is coaxial with the ratchet, the ratchet block is located on the radial side of the ratchet, the side of the ratchet block where the pawl head is located faces the tooth surface of the ratchet, and part of the pawl head of the ratchet block cooperates with the tooth surface of the ratchet and keeps the ratchet block inclined in the vertical direction.

3. The lifting assist device for a calendering apparatus according to claim 1, wherein: The rack is provided with a downward opening, the pulley block, the ratchet and the ratchet block are located in the opening of the rack, the pulley block is arranged at the closed end of the rack, the support plate is transversely connected between the two side walls in the opening, and the ratchet is rotatably connected with the support plate by a second rotating shaft.

4. The lifting assist device for a calendering apparatus according to claim 1, wherein: The butt joint portion includes a connecting rod eccentrically arranged with the ratchet, and a butt joint sleeve is detachably arranged on the connecting rod.

5. A lifting assist device for use with a calendering apparatus as defined in claim 3, wherein: The rack is provided with a vertically sliding foot pedal, the foot pedal is linked with the movable pulley through the flexible cable, the movable pulley rises when the foot pedal descends, and the foot pedal rises when the movable pulley descends.

6. A lifting assist device for use with a calendering apparatus as defined in claim 5, wherein: The rack is provided with a vertically extending sliding groove on one side of the opening, the sliding groove extends transversely to the outside of the rack, the foot pedal is slidingly connected in the sliding groove, and one end of the foot pedal extends to the outside of the rack.

7. A lifting assist device for use with a calendering apparatus as defined in claim 6, wherein: A guide shaft is arranged in the sliding groove close to the top of the rack, the guide shaft is coaxial with the movable pulley, and both ends of the guide shaft are rotatably connected with the rack, one end of the flexible cable passes above the guide shaft and extends downward to be connected with the foot pedal.

8. A lifting assist device for use with a calendering apparatus as defined in claim 3, wherein: A handrail is connected to the upper end of the rack.

9. The lifting assist device for a calendering apparatus according to claim 2, wherein: The movable pulley is rotatably connected with two movable supports on both axial sides, and the ratchet block is located between the two movable supports and is rotatably connected with the two movable supports by the first rotating shaft.

10. A lifting assist device for use with a calendering apparatus as defined in claim 9, wherein: The pulley block further includes a fixed pulley, and the two fixed pulleys and the two movable pulleys form the pulley block. The two fixed pulleys are rotatably connected with fixed supports, and the upper end of the fixed support is fixed. The rack is provided with a vertically sliding foot pedal, the foot pedal is linked with the movable pulley through the flexible cable, the movable pulley rises when the foot pedal descends, and the foot pedal rises when the movable pulley descends. One end of the flexible cable is fixedly connected with the upper end of the movable support, and the other end of the flexible cable sequentially passes around each fixed pulley and movable pulley and is connected with the foot pedal.

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