CN107640721B - Lifting device with full-mechanical speed-changing centrifugal locking assembly - Google Patents
Lifting device with full-mechanical speed-changing centrifugal locking assembly Download PDFInfo
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- CN107640721B CN107640721B CN201711034507.9A CN201711034507A CN107640721B CN 107640721 B CN107640721 B CN 107640721B CN 201711034507 A CN201711034507 A CN 201711034507A CN 107640721 B CN107640721 B CN 107640721B
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Abstract
The application discloses a lifting device with a full-mechanical variable-speed centrifugal locking component, which comprises a guide rail, a mounting frame, a carrier, a power component and a lifting component, wherein the mounting frame is movably arranged on the guide rail; the method is characterized in that: the centrifugal locking device also comprises a centrifugal locking component with full mechanical speed change, wherein the centrifugal locking component with full mechanical speed change comprises a rotating piece, a transmission speed change piece, a rotary disc, a centrifugal piece and a brake component. The device has the advantages of high safety, wide application range, simple and reasonable structure and high reliability.
Description
Technical Field
The present application relates to tool equipment, and more particularly to a lifting device.
Background
The lifting equipment is a device for realizing the back and forth movement of people or objects at low positions and high positions, and the important indexes of the lifting equipment are as follows: 1. safety; 2. the removability; 3. has the functions of crisis relief and escape.
At present, common lifting mechanisms are civil elevators and elevators for buildings. Civil elevators have high requirements on supporting facilities and cannot be used in outdoor operation in general; the cable is adopted to realize lifting, the cable is broken, the falling accident is easy to happen, and in addition, the power failure in the operation is unfavorable for escape. The elevator for the building is suitable for outdoor use, but a steel pipe bracket needs to be erected, the construction is relatively complex, and the cost is high; meanwhile, the building elevator adopts the cable to realize lifting, the cable breakage easily causes falling accidents, and the safety is not high. In addition, if the power is off, the rescue is not facilitated when the power is off and the emergency escape device does not have the functions of crisis relief and escape.
Because outdoor operation scenes are different, such as the electric power construction field, operation construction is needed on an electric tower at a high place, lifting climbing equipment is needed, and the existing building elevator is adopted to have great inconvenience due to the limitation of construction sites; if a fire scene is on site, a normal channel is blocked, and no effective lifting equipment is used for assisting rescue work.
The inventor designs a plurality of lifting devices for this purpose, but the past designs have certain shortcomings in the aspects of safety anti-falling performance, intelligent control function and the like. Therefore, it is a problem to be solved by those skilled in the art to improve the existing lifting device to overcome the above-mentioned problems.
Disclosure of Invention
The lifting device with the full-mechanical speed-changing centrifugal locking assembly is high in safety, wide in application range, simple and reasonable in structure and high in reliability.
The application further aims to provide the full-mechanical variable-speed centrifugal locking assembly which is simple and reasonable in structure, high in reliability and long in service life.
The application further aims to provide a descent control early warning assembly which has a sound reminding function, enables an operator to intuitively feel the descent speed, is simple and reasonable in structure and is reliable to use.
In order to achieve the above purpose, the application adopts the following technical scheme: the lifting device comprises a guide rail, a mounting frame, a carrier, a power assembly and a lifting assembly, wherein the mounting frame is movably arranged on the guide rail, the carrier, the power assembly and the lifting assembly are all arranged on the mounting frame, the power assembly drives the lifting assembly to operate, and the lifting assembly acts on the guide rail to drive the mounting frame to move along the guide rail; the method is characterized in that:
still include full mechanical variable speed centrifugal locking subassembly, full mechanical variable speed centrifugal locking subassembly includes rotation piece, transmission speed change piece, carousel, centrifugation piece and brake block, rotate the piece rotate connect in on the mounting bracket, the mounting bracket is in when moving on the guide rail, the rotation piece acts on the guide rail takes place to rotate, the carousel rotate connect in on the mounting bracket, the rotation piece passes through the transmission speed change piece drives the carousel rotates, the centrifugation piece slide set up in on the carousel, when carousel rotational speed exceeded the setting value, the centrifugation piece can slide outside under centrifugal force effect, thereby contacts brake block makes brake block action, brake block acts on the guide rail realizes the mounting bracket stops the activity.
Preferably, the brake component comprises a lock hook, a clamping column, a brake slide block and a pulling spring, one end of the lock hook is rotationally connected to the brake slide block, the clamping column is fixedly arranged on the mounting frame, the middle section of the lock hook can be buckled on the clamping column, the other end of the lock hook can contact the centrifugal piece, the brake slide block is slidably arranged on the mounting frame, and the pulling spring is arranged between the brake slide block and the mounting frame; when the lifting device normally operates, the rotating speed of the rotating disc is low, at the moment, the centrifugal piece rotates along with the rotating disc and does not contact with the locking hook, the locking hook is locked on the clamping column, the brake sliding block is not contacted with the guide rail, and the pulling spring is in a stretching state; when the lifting device descends at a high speed, the rotating speed of the rotating disc is higher, at the moment, the centrifugal piece slides outwards under the action of centrifugal force while rotating along with the rotating disc until contacting the locking hook, the locking hook is pushed to rotate, the locking hook is separated from the clamping column, the pulling spring is rapidly contracted, the brake slide block is pulled to rapidly slide until contacting the guide rail, and the mounting frame stops moving under the interaction of the brake slide block and the guide rail. The brake slide block is equivalent to a brake block of an automobile, and the mounting frame can be firmly fixed on the guide rail.
As an improvement, the latch hook and the card post are both electric conductors, and the latch hook and the card post are electrically connected with wires, so that a switch structure is formed, the switch structure is connected with the power assembly in series, and the power assembly is disconnected when the latch hook is separated from the card post. The structure can ensure that the power assembly can stop working in time when the mounting frame stops moving, so as to avoid damage to the power assembly, the lifting assembly and the guide rail.
Preferably, the mounting frame is provided with an inclined chute, the brake slide block is slidably arranged in the inclined chute, a contact surface of the brake slide block, which can be contacted with the guide rail, is always parallel to the guide rail, and when the brake slide block moves from one end of the inclined chute to the other end, the brake slide block gradually approaches to or departs from the guide rail; and a latch is arranged on the contact surface of the brake slide block. The structure has the advantages that when the whole device slides downwards, the brake slide block has a trend of upwards moving under the action of friction force when being contacted with the guide rail, namely, the brake slide block has a trend of continuously approaching the guide rail, so that the brake effect of the brake slide block is better; in addition, the latch is effective in more firmly "gripping" the rail.
As an improvement, a return spring is also arranged between the turntable and the centrifugal piece; the other end of the lock hook is connected with a contact block in a threaded manner, the contact block is in contact with the centrifugal piece, and the distance between the contact block and the centrifugal piece can be adjusted by rotating the contact block on the lock hook. The reset spring can enable the centrifugal piece to have a trend of sliding inwards, so that a reset effect is achieved; it should be noted that the centrifugal force acting on the centrifugal member needs to overcome the gravity of the centrifugal member, the friction force between the centrifugal member and the turntable, and the elastic force of the return spring to enable the centrifugal member to slide outwards. And the contact block is used for adjusting the distance between the contact block and the centrifugal piece, namely adjusting the rotating speed of the turntable when the centrifugal piece can act on the brake component, namely setting the falling safety speed.
Further improvement, a first unidirectional gear is arranged between the rotating piece and the transmission speed changing piece; when the lifting device descends, the rotating piece drives the transmission speed changing piece to move through the first unidirectional gear, and when the lifting device ascends, the transmission speed changing piece does not move. The ineffective rotation of the transmission speed change part can be avoided, and the service life of the whole device is prolonged; and the centrifugal piece can be prevented from accidentally contacting the lock hook when the lifting device rises too fast.
Alternatively, the transmission speed changing part is a synchronous belt body wheel structure or a reduction gearbox structure or a gear set structure. One function of the transmission speed changing part is transmission, the other function is speed changing, and the rotating speed of the turntable can be adjusted by setting a transmission ratio, so that the speed changing part is also a mode for setting the falling safety speed. In general, the rotation of the turntable needs to be larger than that of the rotating member to ensure that enough centrifugal force is applied to enable the centrifugal member to act, so that the reduction gearbox structure is actually a reduction gearbox inverted structure and plays a role in acceleration.
As a further optimization, the lifting device further comprises a descending early warning component, the descending early warning component comprises a power supply piece, a second one-way gear, a contact cam, a travel switch and a buzzer, the second one-way gear is arranged on the rotating piece, when the lifting device descends, the rotating piece drives the second one-way gear to rotate, when the lifting device ascends, the second one-way gear does not rotate, the contact cam is fixedly arranged on the second one-way gear and synchronously rotates, the travel switch is fixedly arranged on the mounting frame, the power supply piece, the travel switch and the buzzer are connected in series, and the power supply piece provides power for the buzzer; when the contact cam rotates, the protruding part of the contact cam intermittently contacts the travel switch, and the power supply piece and the buzzer can be intermittently communicated, so that the buzzer can generate a sounding sound of a gap. Wherein the contact cam and the travel switch are in point-to-point contact. The advantage of point-to-point contact is that when the lifting device is stopped, contact between the contact cam and the travel switch can be basically avoided, namely continuous buzzing of the buzzer is avoided. In addition, the buzzer can send out voice reminding sounds, such as 'descending please pay attention to', 'paying attention to safety', 'lower personnel please leave', and the like.
Preferably, the guide rail is provided with a gear groove, the lifting assembly is of a gear structure matched with the gear groove, the lifting assembly comprises a main gear and a secondary gear, the main gear and the secondary gear are concentrically and fixedly arranged, and the contact surfaces of the main gear and the guide rail are higher than those of the secondary gear; the number of the auxiliary gears is two, the auxiliary gears are arranged on two sides of the main gear, the main gear is made of plastic materials, and the auxiliary gears are made of metal materials; the main gear and the auxiliary gear are concentrically fixed through a transmission shaft, a fixing bolt and a nut seat; a large shaft hole is formed in the center of the main gear, an outer semicircular hole which is communicated with the large shaft hole is formed in the peripheral side of the large shaft hole, and the circle center of the outer semicircular hole is located on the edge line of the large shaft hole; a small shaft hole is formed in the center of the pinion, a circular hole which is not communicated is formed in the outer side of the small shaft hole, and the distance from the circular hole to the center of the small shaft hole is equal to the radius of the large shaft hole; the transmission shaft is provided with a large shaft section with the same diameter as the large shaft hole and a small shaft section with the same diameter as the small shaft hole, an inner semicircular hole is formed in the periphery of the large shaft section, the circle center of the inner semicircular hole is located on the side line of the large shaft section, the main gear is mounted on the large shaft section, and the auxiliary gear is mounted on the small shaft section; the fixing bolt can penetrate through the outer semicircular hole, the inner semicircular hole and the circular hole respectively to be circumferentially fixed, and the nut seat can be fixed at two ends of the fixing bolt to be axially fixed. Under normal conditions, the main gear contacts the guide rail to advance, and when the main gear is suddenly damaged, the auxiliary gear starts to contact the guide rail to advance, and the auxiliary gear plays a standby role, so that the safety of the whole device is further improved. The main gear is made of plastic, the plastic gear has small movement noise on the guide rail, and the metal gear has large movement noise on the guide rail, but the plastic has lower strength than metal, and can be cracked, so the plastic gear is comprehensively considered, the plastic gear is a main gear and a metal pinion, the safety is ensured, and the noise of the device can be reduced. Further preferably, the main gear may be made of nylon and the sub gear may be made of stainless steel. In addition, the main gear is made of plastic, the precision of hole machining by adopting a lathe is not high, and the lifting assembly needs high assembly precision, so that a structure that the main gear large shaft hole and the outer semicircular hole are communicated is designed, and the structure can be machined by adopting linear cutting, so that the lifting assembly has high machining precision and can meet the assembly requirement of the lifting assembly.
As an improvement, the upper end of the mounting frame can be fixedly provided with a mounting holding rod, and the length of the mounting holding rod is greater than that of the guide rail. After the first section guide rail is installed, the second section guide rail can be hung on the installation holding pole, the second section guide rail is conveyed to the top end of the first section guide rail by ascending through the lifting device, the installation of the second section guide rail is completed, the lifting device descends again, and the third section guide rail is conveyed to be sequentially carried out until the installation of the whole guide rail is completed. The guide rail installation mode is convenient to assemble, small in occupied area during assembly and high in assembly efficiency.
Compared with the prior art, the application has the advantages that: 1. the setting of full mechanical variable speed centrifugal locking subassembly can the whole elevating gear's of real-time feedback decline speed, and unexpected situations such as the elevating gear damage, guide rail deformation, power component out of control take place, lead to whole device high-speed decline when, full mechanical variable speed centrifugal locking subassembly just reacts immediately, and it is dead to fix the lock with whole device, avoids the device to cause personnel injury and article damage because of high-speed whereabouts. And the full-mechanical speed-changing centrifugal locking component is of a full-mechanical structure, so that the reliability is better compared with electronic equipment, and the device can adapt to various severe environments such as high cold, high pressure, low pressure, high temperature, high humidity and the like, and meets various use requirements of the power equipment. 2. The descending early warning assembly can remind operators and lower staff of paying attention to safety when the lifting device descends; the clearance buzzer frequency of the buzzer can intuitively sense the descending speed through hearing, namely the denser the buzzer is, the faster the descending speed is, and the slower the buzzer is, so that a good reminding and early warning effect is achieved; compared with electronic equipment, the electronic equipment has better reliability, stronger applicability, low cost and simple structure.
Drawings
FIG. 1 is a schematic perspective view of a preferred embodiment of the present application;
FIG. 2 is a schematic illustration of a partially exploded condition according to a preferred embodiment of the present application;
FIG. 3 is a schematic illustration of the assembly of the lift assembly and guide rail in accordance with a preferred embodiment of the present application;
FIG. 4 is a schematic view of an exploded view of a lift assembly in accordance with a preferred embodiment of the present application;
FIG. 5 is an axial view of a drive shaft in accordance with a preferred embodiment of the present application;
FIG. 6 is an axial view of a main gear in accordance with a preferred embodiment of the present application;
FIG. 7 is an axial view of a pinion gear in accordance with a preferred embodiment of the application;
FIG. 8 is a schematic plan view of an all-mechanical variable speed centrifugal lock-up assembly in accordance with a preferred embodiment of the application;
FIG. 9 is a schematic perspective view of an all-mechanical variable speed centrifugal lock-out assembly in accordance with a preferred embodiment of the present application;
FIG. 10 is a schematic perspective view of a descent early warning assembly in accordance with a preferred embodiment of the present application;
FIG. 11 is a schematic plan view of a descent early warning assembly in accordance with a preferred embodiment of the present application;
FIG. 12 is a schematic illustration of the structure of the transmission assembly in a reduction gearbox configuration in accordance with a preferred embodiment of the present application;
FIG. 13 is a schematic illustration of the structure of a transmission shift assembly in a gear set configuration in accordance with a preferred embodiment of the present application;
fig. 14 is a schematic view showing a structure of a brake slide according to a preferred embodiment of the present application.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the application. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
As shown in fig. 1 to 14, the first embodiment of the present application includes a guide rail 1, a mounting frame 2, a carrier 3, a power component 4, a lifting component 5 and a falling protection component 6, where the mounting frame 2 is movably disposed on the guide rail 1, the carrier 3, the power component 4, the lifting component 5 and the falling protection component 6 are all disposed on the mounting frame 2, the power component 4 drives the lifting component 5 to operate, and the lifting component 5 acts on the guide rail 1 to drive the mounting frame 2 to move along the guide rail.
One key of this embodiment is the arrangement of the fully mechanical variable speed centrifugal locking assembly 6, specifically: the full-mechanical speed-changing centrifugal locking assembly 6 comprises a rotating member 61, transmission speed-changing members 62 (62 ', 62 "), a turntable 63, a centrifugal member 64 and a brake component, wherein the rotating member 61 is rotationally connected to the mounting frame 2, when the mounting frame 2 moves on the guide rail 1, the rotating member 61 acts on the guide rail 1 to rotate, the turntable 63 is rotationally connected to the mounting frame 2, the rotating member 61 drives the turntable 63 to rotate through the transmission speed-changing members 62 (62', 62"), the centrifugal member 64 is slidably arranged on the turntable 63, and when the rotating speed of the turntable 63 exceeds a set value, the centrifugal member 64 can slide outwards under the action of centrifugal force, so that the brake component is contacted, the brake component acts on the guide rail 1, and the movement of the mounting frame 2 is stopped.
The brake component in this embodiment includes a latch hook 66, a latch post 67, a brake slider 68 and a pulling spring 69, one end of the latch hook 66 is rotationally connected to the brake slider 68, the latch post 67 is fixedly arranged on the mounting frame 2, the middle section of the latch hook 66 can be buckled on the latch post 67, the other end of the latch hook 66 can contact the centrifugal piece 63, the brake slider 68 is slidably arranged on the mounting frame 2, and the pulling spring 69 is arranged between the brake slider 68 and the mounting frame 2; when the lifting device normally operates, the rotating speed of the rotating disc 63 is low, at the moment, the centrifugal piece 64 rotates along with the rotating disc 63 and does not contact the locking hook 66, the locking hook 66 is locked on the clamping column 67, the brake sliding block 68 is not contacted with the guide rail, and the pulling spring 69 is in a stretching state. The working principle is as follows: when the lifting device descends at a high speed, the rotating speed of the turntable 63 is higher, at the moment, the centrifugal piece 64 slides outwards under the action of centrifugal force while rotating along with the turntable 63 until contacting the lock hook 66, the lock hook 66 is pushed to rotate, the lock hook 66 is separated from the clamping post 67, the pulling spring 69 is pulled to be quickly contracted, the brake slide block 68 is pulled to be quickly slid until contacting the guide rail 1, and the mounting frame 2 stops moving under the interaction of the brake slide block 68 and the guide rail 1.
In addition, for increasing the safety, the latch hook 66 and the card post 67 are both electric conductors, and the latch hook 66 and the card post 67 are electrically connected with the lead 60, so as to form a switch structure, and the switch structure is connected in series with the power component 4, and when the latch hook 66 is separated from the card post 67, the power component 4 is disconnected.
Moreover, the mounting frame 2 is provided with the inclined chute 21, the brake slide block 68 is slidably arranged in the inclined chute 21, the contact surface of the brake slide block 68, which can be contacted with the guide rail 1, is always parallel to the guide rail 1, and when the brake slide block 68 moves from one end of the inclined chute 21 to the other end, the brake slide block 68 gradually approaches or is far away from the guide rail 1. In addition, a latch 681 is provided on the contact surface of the brake slider 68. A return spring 65 is also arranged between the turntable 63 and the centrifugal piece 64; the other end of the lock hook 66 is connected with a contact block 661 in a threaded manner, the contact block 661 is in contact with the centrifugal piece 64, and the distance between the contact block 661 and the centrifugal piece 64 can be adjusted by rotating the contact block 661 on the lock hook 66. A first one-way gear 621 is also provided between the rotating member 61 and the transmission speed changing member 62; the rotation member 61 drives the transmission speed changing member 62 to move through the first one-way gear 621 when the lifting device descends, and the transmission speed changing member 62 does not move when the lifting device ascends.
In this embodiment, the transmission gear 62 (62 ', 62 ") may be a timing belt and body wheel structure 62 (shown in fig. 1, 2, 8, 9, 10) or a reduction gearbox structure 62' (shown in fig. 12) or a gear set structure 62" (shown in fig. 13).
Another key of this embodiment is the arrangement of the descent warning device 7, specifically: the descending early warning assembly 7 comprises a power supply piece 71, a second one-way gear 72, a contact cam 73, a travel switch 74 and a buzzer 75, wherein the second one-way gear 72 is arranged on the rotating piece 61, when the lifting device descends, the rotating piece 61 drives the second one-way gear 72 to rotate, when the lifting device ascends, the second one-way gear 72 does not rotate, the contact cam 73 is fixedly arranged on the second one-way gear 72 and synchronously rotates, the travel switch 74 is fixedly arranged on the mounting frame 2, the power supply piece 71, the travel switch 74 and the buzzer 75 are connected in series, and the power supply piece 71 provides power for the buzzer 75. The working principle is as follows: when the contact cam 73 rotates, the protruding portion of the contact cam 73 intermittently contacts the travel switch 74, and the power member 71 and the buzzer 75 are intermittently connected to each other, so that the buzzer 75 sounds in a gap. Wherein the contact cam 73 and the travel switch 74 are in point-to-point contact. As another alternative, the buzzer 75 can sound a voice alert, such as "drop attention", "pay attention to safety", "lower person please leave", or the like.
A further key point of this embodiment is the arrangement of the lifting assembly 5, in particular: the guide rail 1 is provided with a gear groove 11, the lifting assembly 5 is of a gear structure matched with the gear groove 11, the lifting assembly 5 comprises a main gear 51 and a secondary gear 52, the main gear 51 and the secondary gear 52 are concentrically and fixedly arranged, and the contact surfaces of the main gear 51 and the guide rail 1 are higher than the secondary gear 52. The number of the auxiliary gears 52 is two, the auxiliary gears are arranged on two sides of the main gear 51, the main gear 51 is made of plastic materials, and the auxiliary gears 52 are made of metal materials. The main gear 51 and the auxiliary gear 52 are concentrically fixed through a transmission shaft 53, a fixing bolt 54 and a nut seat 55; the center of the main gear 51 is provided with a large shaft hole 511, the periphery of the large shaft hole 511 is provided with an outer semicircular hole 512 which is communicated with the large shaft hole 511, and the center of the outer semicircular hole 512 is positioned on the edge line of the large shaft hole 511; a small shaft hole 521 is formed in the center of the pinion 52, a circular hole 522 which is not communicated is formed in the outer side of the small shaft hole 521, and the distance from the circular hole 522 to the center of the small shaft hole 521 is equal to the radius of the large shaft hole 511; the transmission shaft 53 is provided with a large shaft section 531 with the same diameter as the large shaft hole 511 and a small shaft section 532 with the same diameter as the small shaft hole 521, an inner semicircular hole 533 is formed in the periphery of the large shaft section 531, the center of the inner semicircular hole 533 is located on the side line of the large shaft section 531, the main gear 51 is mounted on the large shaft section 531, and the auxiliary gear 52 is mounted on the small shaft section 532; the fixing bolt 54 can pass through the outer semicircle hole 512, the inner semicircle hole 533 and the round hole 522 respectively to be fixed in the circumferential direction, and the nut seat 55 can be fixed at both ends of the fixing bolt 54 to be fixed in the axial direction.
As an extension of this embodiment, the installation pole 8 can also be fixedly arranged at the upper end of the installation frame 2, the length of the installation pole 8 is greater than that of the section of guide rail 1, and the installation pole 8 is used as the guide rail 1 which is installed in sequence.
The foregoing has shown and described the basic principles, principal features and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.
Claims (8)
1. The lifting device comprises a guide rail, a mounting frame, a carrier, a power assembly and a lifting assembly, wherein the mounting frame is movably arranged on the guide rail, the carrier, the power assembly and the lifting assembly are all arranged on the mounting frame, the power assembly drives the lifting assembly to operate, and the lifting assembly acts on the guide rail to drive the mounting frame to move along the guide rail; the method is characterized in that:
the centrifugal locking assembly comprises a rotating piece, a transmission speed changing piece, a rotary disc, a centrifugal piece and a brake component, wherein the rotating piece is rotationally connected to the mounting frame, when the mounting frame moves on the guide rail, the rotating piece acts on the guide rail to rotate, the rotary disc is rotationally connected to the mounting frame, the rotating piece drives the rotary disc to rotate through the transmission speed changing piece, the centrifugal piece is slidably arranged on the rotary disc, when the rotary disc rotating speed exceeds a set value, the centrifugal piece can slide outwards under the action of centrifugal force, so as to contact the brake component to enable the brake component to act, and the brake component acts on the guide rail to stop the movement of the mounting frame;
the brake component comprises a lock hook, a clamping column, a brake sliding block and a pulling spring, one end of the lock hook is rotationally connected to the brake sliding block, the clamping column is fixedly arranged on the mounting frame, the middle section of the lock hook can be buckled on the clamping column, the other end of the lock hook can contact the centrifugal piece, the brake sliding block is slidably arranged on the mounting frame, and the pulling spring is arranged between the brake sliding block and the mounting frame; when the lifting device normally operates, the rotating speed of the rotating disc is low, at the moment, the centrifugal piece rotates along with the rotating disc and does not contact with the locking hook, the locking hook is locked on the clamping column, the brake sliding block is not contacted with the guide rail, and the pulling spring is in a stretching state; when the lifting device descends at a high speed, the rotating speed of the turntable is higher, at the moment, the centrifugal piece slides outwards under the action of centrifugal force while rotating along with the turntable until contacting the lock hook, the lock hook is pushed to rotate, the lock hook is separated from the clamping column, the pulling spring is rapidly contracted, the brake slide block is pulled to rapidly slide until contacting the guide rail, and the mounting frame stops moving under the interaction of the brake slide block and the guide rail;
the lifting device further comprises a descending early warning assembly, the descending early warning assembly comprises a power supply piece, a second one-way gear, a contact cam, a travel switch and a buzzer, the second one-way gear is arranged on the rotating piece, when the lifting device descends, the rotating piece drives the second one-way gear to rotate, when the lifting device ascends, the second one-way gear does not rotate, the contact cam is fixedly arranged on the second one-way gear and synchronously rotates, the travel switch is fixedly arranged on the mounting frame, the power supply piece, the travel switch and the buzzer are connected in series, and the power supply piece provides power for the buzzer; when the contact cam rotates, the protruding part of the contact cam intermittently contacts the travel switch, and the power supply piece and the buzzer can be intermittently communicated, so that the buzzer can generate a sounding sound of a gap.
2. A lifting device with an all-mechanical variable-speed centrifugal locking assembly according to claim 1, wherein: the locking hook and the clamping column are conductors, and the locking hook and the clamping column are electrically connected with wires, so that a switch structure is formed, the switch structure is connected with the power assembly in series, and when the locking hook is separated from the clamping column, the power assembly is disconnected.
3. A lifting device with an all-mechanical variable-speed centrifugal locking assembly according to claim 2, wherein: the mounting frame is provided with an inclined chute, the brake slide block is arranged in the inclined chute in a sliding manner, the contact surface of the brake slide block, which can be contacted with the guide rail, is always parallel to the guide rail, and when the brake slide block moves from one end of the inclined chute to the other end, the brake slide block gradually approaches to or is far away from the guide rail; and a latch is arranged on the contact surface of the brake slide block.
4. A lifting device with an all-mechanical variable speed centrifugal lock assembly according to claim 3, wherein: a reset spring is also arranged between the turntable and the centrifugal piece; the other end of the lock hook is connected with a contact block in a threaded manner, the contact block is in contact with the centrifugal piece, and the distance between the contact block and the centrifugal piece can be adjusted by rotating the contact block on the lock hook.
5. A lifting device with an all-mechanical variable speed centrifugal lock assembly according to claim 4, wherein: a first unidirectional gear is arranged between the rotating piece and the transmission speed changing piece; when the lifting device descends, the rotating piece drives the transmission speed changing piece to move through the first unidirectional gear, and when the lifting device ascends, the transmission speed changing piece does not move.
6. A lifting device with an all-mechanical variable speed centrifugal lock assembly according to claim 5, wherein: the transmission speed change part is of a synchronous belt body wheel structure or a reduction gearbox structure or a gear set structure.
7. A lifting device with an all-mechanical variable-speed centrifugal locking assembly according to claim 1, wherein: the guide rail is provided with a gear groove, the lifting assembly is of a gear structure matched with the gear groove, the lifting assembly comprises a main gear and a secondary gear, the main gear and the secondary gear are concentrically and fixedly arranged, and the contact surfaces of the main gear and the guide rail are higher than those of the secondary gear; the number of the auxiliary gears is two, the auxiliary gears are arranged on two sides of the main gear, the main gear is made of plastic materials, and the auxiliary gears are made of metal materials; the main gear and the auxiliary gear are concentrically fixed through a transmission shaft, a fixing bolt and a nut seat; a large shaft hole is formed in the center of the main gear, an outer semicircular hole which is communicated with the large shaft hole is formed in the peripheral side of the large shaft hole, and the circle center of the outer semicircular hole is located on the edge line of the large shaft hole; a small shaft hole is formed in the center of the pinion, a circular hole which is not communicated is formed in the outer side of the small shaft hole, and the distance from the circular hole to the center of the small shaft hole is equal to the radius of the large shaft hole; the transmission shaft is provided with a large shaft section with the same diameter as the large shaft hole and a small shaft section with the same diameter as the small shaft hole, an inner semicircular hole is formed in the periphery of the large shaft section, the circle center of the inner semicircular hole is located on the side line of the large shaft section, the main gear is mounted on the large shaft section, and the auxiliary gear is mounted on the small shaft section; the fixing bolt can penetrate through the outer semicircular hole, the inner semicircular hole and the circular hole respectively to be circumferentially fixed, and the nut seat can be fixed at two ends of the fixing bolt to be axially fixed.
8. A lifting device with an all-mechanical variable speed centrifugal lock assembly according to any one of claims 1 to 7, wherein: the installation pole can also be fixedly arranged at the upper end of the installation frame, and the length of the installation pole is greater than that of one section of the guide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711034507.9A CN107640721B (en) | 2017-10-30 | 2017-10-30 | Lifting device with full-mechanical speed-changing centrifugal locking assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711034507.9A CN107640721B (en) | 2017-10-30 | 2017-10-30 | Lifting device with full-mechanical speed-changing centrifugal locking assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107640721A CN107640721A (en) | 2018-01-30 |
| CN107640721B true CN107640721B (en) | 2023-09-12 |
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| CN108423604B (en) * | 2018-04-02 | 2023-08-01 | 吉林大学 | Jack |
| CN108466994B (en) * | 2018-05-14 | 2020-10-20 | 浙江捷昌线性驱动科技股份有限公司 | Transmission device and lifting upright post |
| CN109110612A (en) * | 2018-09-04 | 2019-01-01 | 浙江弘安智能科技有限公司 | A kind of improved lifting device with full mechanical speed change centrifugation latch assembly |
| CN111731404B (en) * | 2020-07-28 | 2023-08-15 | 北京瑞华新科科技有限公司 | Folding climbing robot, climbing structure |
| CN112838352B (en) * | 2020-12-30 | 2021-11-09 | 无锡圣普电力科技有限公司 | Antenna mounting bracket suitable for narrow space |
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| CN207330278U (en) * | 2017-10-30 | 2018-05-08 | 宁波天弘电力器具有限公司 | A kind of lifting gear with full mechanical speed change centrifugation lock assembly |
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| CN203247039U (en) * | 2013-05-06 | 2013-10-23 | 王博洪 | Pneumatic lifter |
| CN103387167A (en) * | 2013-08-22 | 2013-11-13 | 魏伯卿 | Anti-falling protection device for elevator |
| CN204002177U (en) * | 2014-05-16 | 2014-12-10 | 唐秀慧 | Doorframe collision prevention device based on safety belt mode |
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| CN104828668A (en) * | 2015-05-21 | 2015-08-12 | 南通三洋电梯有限责任公司 | Elevator adjusting-type centrifugation speed limiting device |
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| CN107640721A (en) | 2018-01-30 |
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