Lifting limiter

Abstract

The utility model discloses a hoisting limiter which comprises a lower shell and an upper shell fixedly installed on the lower shell, a rotating speed sensor is arranged at the position, corresponding to a second shaft, of the upper surface of a partition plate, and the rotating speed sensor is used for monitoring the rotating speed of the second shaft; a controller is arranged on one side of the upper surface of the partition plate and electrically connected with the rotating speed sensor. When the input shaft rotates, the first spiral tooth and the sixth gear are matched to drive the seventh gear to rotate, then the seventh gear and the eighth gear are matched to drive the second shaft to rotate, the rotating speed of the second shaft is monitored in real time through the rotating speed sensor, the monitored rotating speed is converted into an electric signal, and the electric signal is uploaded to the controller. And when the rotating speed of the second shaft exceeds the set threshold value, the rotating speed of the input shaft also exceeds the threshold value, and then the controller controls the hoisting power supply to be switched off, so that dangers are avoided, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stroke limit, in particular to a hoisting limiter. Background Technique

[0002] As an important special equipment, the crane is widely used in many industries in the field of national production. The height limiter installed on the crane is used to limit the height of the lifting device, ensuring that when the lifted object reaches the height limit position, the limiter can cut off the power supply of the crane and prevent the lifting device from continuing to be lifted and colliding with the crane to break the steel wire rope, resulting in large accidents such as the falling of the lifted weight.

[0003] The existing utility model patent with the application number 202021983214.2 discloses a lifting height limiter, which includes an upper shell and a lower shell. A partition plate is fixed at the upper end face of the inner cavity of the lower shell. An input shaft is rotatably supported in the inner cavity of the lower shell. The input shaft is located between the partition plate and the bottom surface of the lower shell, and both ends of the input shaft extend out of the lower shell. The middle position of the input shaft is a spiral tooth, which is connected to a reduction device. The reduction device drives a convex block, and the convex block operates a circuit breaker. The circuit breaker is respectively connected to an external control device to realize different functions such as deceleration and stopping.

[0004] When the above-mentioned lifting height limiter is in use, it is impossible to monitor the rotation speed of the input shaft of the limiter. When the rotation speed of the input shaft is too fast, it means that the lifting speed is relatively fast, which poses a safety hazard. Therefore, it is necessary to monitor the rotation speed of the input shaft in real time. Summary of the Invention

[0005] The purpose of the utility model is to provide a hoisting limiter to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A hoisting limiter includes a lower shell and an upper shell fixedly installed on the lower shell. A partition plate is fixedly installed at the upper end face of the inner cavity of the lower shell. An input shaft is rotatably installed inside the lower shell. The input shaft is located between the partition plate and the bottom surface of the lower shell, and both ends of the input shaft extend out of the lower shell;

[0007] On one side of the surface of the input shaft inside the lower shell, a first spiral tooth and a second spiral tooth are provided. A sixth gear meshing with the first spiral tooth is rotatably installed inside the lower shell. A seventh gear is provided on the sixth gear. On one side of the lower surface of the partition plate, an eighth gear meshing with the seventh gear is rotatably installed. A second shaft extending above the partition plate is provided at the center of the eighth gear. A rotational speed sensor is provided at the position corresponding to the second shaft on the upper surface of the partition plate. The rotational speed sensor is used to monitor the rotational speed of the second shaft;

[0008] One side of the upper surface of the partition board is provided with a controller, and the controller is electrically connected to the rotational speed sensor.

[0009] Wherein, a reduction device matching with the second spiral tooth is arranged inside the lower shell body, the reduction device drives a plurality of bumps, a protrusion is arranged on the bump, and a circuit breaker is arranged on one side of the bump, and the circuit breaker is electrically connected to the controller.

[0010] Wherein, a long wheel antenna matching with the protrusion is arranged on the circuit breaker, the number of the circuit breakers is equal to the number of the bumps, and the height of the long wheel antenna on the circuit breaker corresponds to the height of the protrusion.

[0011] Wherein, the reduction device includes a first shaft and a third shaft, both the first shaft and the third shaft are rotatably installed between the bottom surface of the lower shell body and the partition board, and the upper end of the third shaft extends out of the partition board;

[0012] A plurality of the bumps are fixedly sleeved with a first gear meshing with the second spiral tooth through an installation mechanism, a second gear is fixedly installed below the first gear, both the second gear and the first gear are sleeved on the third shaft in an idle manner, a fourth gear and a fifth gear are installed on the first shaft, both the fourth gear and the fifth gear are sleeved on the first shaft through a flat key, the fourth gear meshes with the second gear, a sixth gear meshes with a third gear, and the third gear is sleeved on the third shaft at a position close to the partition board through a flat key.

[0013] Wherein, the installation mechanism includes a chassis, a partition ring and a top plate, the chassis is sleeved at the lowermost part of the extending end of the third shaft, the bumps and the partition ring are alternately sleeved above the extending end in sequence, the top plate is sleeved above the extending end, a thread is formed on the circumferential surface of the third shaft close to the upper end, and a nut matching with the thread is screwed on the thread.

[0014] Wherein, the bump is of an annular structure, internal teeth are arranged on the inner annular surface thereof, a round hole is formed on the upper end surface of the top plate, an adjusting rod is installed in the round hole, the adjusting rod is vertically arranged downward, the diameter of the head of the adjusting rod is larger than the diameter of the round hole, and an adjusting tooth is fixedly arranged at the bottom of the adjusting rod, and the adjusting tooth meshes with the internal teeth.

[0015] Wherein, the circuit breaker adopts a V-15-1B5 microswitch.

[0016] Wherein, the diameters of the first spiral tooth, the sixth gear and the second shaft are the same, and the diameters of the seventh gear and the eighth gear are the same.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] When the input shaft of the present utility model rotates, the first spiral tooth and the sixth gear cooperate to drive the seventh gear to rotate, and then the seventh gear and the eighth gear cooperate to drive the second shaft to rotate. Then, the rotational speed of the second shaft is monitored in real time by a rotational speed sensor, and the monitored rotational speed is converted into an electrical signal and uploaded to the controller. When the rotational speed of the second shaft exceeds the set threshold value, it indicates that the rotational speed of the input shaft also exceeds the threshold value. Then, the controller controls the hoisting power supply to be turned off to avoid danger and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic isometric view of the first direction of the present utility model;

[0020] Figure 2 is a schematic isometric view of the second direction of the present utility model;

[0021] Figure 3 is a schematic isometric view of the first direction of the internal structure of the present utility model;

[0022] Figure 4 is a schematic isometric view of the second direction of the internal structure of the present utility model;

[0023] Figure 5 is a schematic view of the combined structure of the convex block and the circuit breaker of the present utility model;

[0024] Figure 6 is a schematic isometric view of the partition board of the present utility model;

[0025] Figure 7 is a schematic view of the speed reduction mechanism of the present utility model;

[0026] Figure 8 is an exploded view of the speed reduction mechanism of the present utility model.

[0027] In the figure: 101, upper housing; 102, lower housing; 103, partition board; 200, convex block; 201, protrusion; 300, circuit breaker; 301, long wheel antenna; 400, input shaft; 401, first spiral tooth; 402, second spiral tooth; 501, first gear; 502, second gear; 503, third gear; 504, first shaft; 505, fourth gear; 506, fifth gear; 601, sixth gear; 602, seventh gear; 603, eighth gear; 604, second shaft; 700, rotational speed sensor; 800, controller; 900, third shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0029] Please refer to Figure 1-8 Figure 1-8 As shown in

[0030]

[0030] , the utility model provides a technical solution: a lifting limiter, which includes a lower housing 102 and an upper housing 101 fixedly installed on the lower housing 102. A partition plate 103 is fixedly installed at the upper end face of the inner cavity of the lower housing 102. An input shaft 400 is rotatably installed inside the lower housing 102. The input shaft 400 is located at the middle position between the partition plate 103 and the bottom surface of the lower housing 102, and both ends of the input shaft 400 extend out of the lower housing 102. An external transmission device is connected to the input shaft 400 and drives the input shaft 400 to rotate.

[0031]

[0031] On one side of the surface of the input shaft 400 inside the lower housing 102, a first helical tooth 401 and a second helical tooth 402 are provided. A sixth gear 601 meshing with the first helical tooth 401 is rotatably installed inside the lower housing 102. A seventh gear 602 is provided on the sixth gear 601. On one side of the lower surface of the partition plate 103, an eighth gear 603 meshing with the seventh gear 602 is rotatably installed. At the center of the eighth gear 603, a second shaft 604 extending above the partition plate 103 is provided. At the position corresponding to the second shaft 604 on the upper surface of the partition plate 103, a rotational speed sensor 700 is provided. The rotational speed sensor 700 is used to monitor the rotational speed of the second shaft 604. On one side of the upper surface of the partition plate 103, a controller 800 is provided. The controller 800 is electrically connected to the rotational speed sensor 700.

[0032]

[0032] Among them, the first helical tooth 401, the sixth gear 601, and the second shaft 604 have the same diameter size, and the seventh gear 602 and the eighth gear 603 have the same diameter size. When the input shaft 400 rotates, the seventh gear 602 is driven to rotate through the cooperation of the first helical tooth 401 and the sixth gear 601, and then the second shaft 604 is driven to rotate through the cooperation of the seventh gear 602 and the eighth gear 603. The rotational speed of the second shaft 604 is the same as that of the first helical tooth 401 (input shaft 400). At the same time, the rotational speed of the second shaft 604 is monitored in real time through the rotational speed sensor 700.

[0033] Among them, a speed reduction device matched with the second spiral tooth 402 is provided inside the lower housing 102. The speed reduction device drives four bumps 200. Protrusions 201 are provided on the bumps 200. A circuit breaker 300 is provided on one side of the bumps 200. The circuit breaker 300 is electrically connected to the controller 800. The four bumps 200 will operate the four circuit breakers 300 to cut off the corresponding movement. The four circuit breakers 300 are respectively connected to the controller 800 through an external circuit. Specifically, in this embodiment, the circuit breaker 300 adopts a V-15-1B5 micro switch.

[0034] Among them, the circuit breaker 300 is provided with a long wheel antenna 301 matched with the protrusion 201. The number of the circuit breakers 300 is equal to the number of the bumps 200, and the height of the long wheel antenna 301 on the circuit breaker 300 corresponds to the height of the protrusion 201. The bump 200 is of an annular structure, and internal teeth are provided on the inner annular surface thereof. A round hole is opened on the upper end surface of the top plate, and an adjusting rod is installed in the round hole. The adjusting rod is vertically arranged downward. The diameter of the head of the adjusting rod is larger than the diameter of the round hole. An adjusting tooth is fixedly arranged at the bottom of the adjusting rod. The adjusting tooth is meshed with the internal teeth. By rotating the adjusting rod on the upper side of the top plate, the bump 200 can be driven to rotate, and further the position of the protrusion 201 part of the bump 200 can be adjusted.

[0035] Among them, the speed reduction device includes a first shaft 504 and a third shaft 900. The first shaft 504 and the third shaft 900 are both rotatably installed between the bottom surface of the lower housing 102 and the partition plate 103, and the upper end of the third shaft 900 extends out of the partition plate 103; a plurality of bumps 200 are fixedly sleeved with a first gear 501 meshed with the second spiral tooth 402 through an installation mechanism. A second gear 502 is fixedly installed below the first gear 501. Both the second gear 502 and the first gear 501 are sleeved on the third shaft 900 in an idle manner. A fourth gear 505 and a fifth gear 506 are installed on the first shaft 504. Both the fourth gear 505 and the fifth gear 506 are sleeved on the first shaft 504 through flat keys. The fourth gear 505 is meshed with the second gear 502, and the sixth gear 506 is meshed with the third gear 503. The third gear 503 is sleeved on the third shaft 900 at a position close to the partition plate 103 through a flat key.

[0036] Among them, the installation mechanism includes a chassis, a partition ring and a top plate. The chassis is sleeved on the lowermost part of the extended end of the third shaft 900. The bumps 200 and the partition ring are alternately sleeved on the upper part of the extended end in sequence. The top plate is sleeved on the upper part of the extended end. A thread is opened on the circumferential surface of the third shaft 900 near the upper end, and a nut adapted to the thread is screwed on the thread.

[0037] Among them, during operation, an external transmission device is connected to the input shaft 400 and drives the input shaft 400 to rotate. When the input shaft 400 rotates, the second helical teeth 402 on the input shaft 400 mesh with the first gear 501 to drive the first gear 501 to rotate. A second gear 502 is arranged below the first gear 501. The second gear 502 is fixed to the first gear 501, and both the second gear 502 and the first gear 501 are sleeved loosely on the third shaft 900. Therefore, the first gear 501 will drive the second gear 502 to rotate synchronously, and the third shaft 900 will not rotate. When the second gear 502 rotates, it meshes with the fourth gear 505, and the fourth gear 505 is sleeved on the first shaft 504 through a flat key. Therefore, the fourth gear 505 will drive the first shaft 504 to rotate. When the first shaft 504 rotates, it drives the fifth gear 506 to rotate. The fifth gear 506 meshes with the third gear 503, and the third gear 503 is connected to the third shaft 900 through a flat key. Therefore, it will drive the third shaft 900 to rotate. After the third shaft 900 rotates, the convex blocks 200 will rotate synchronously. Protrusions 201 are provided on all four convex blocks 200 and are staggered from each other. When the protrusion 201 rotates to the position of the long wheel antenna 301 of the circuit breaker 300, it will press down the long wheel antenna 301 to energize or de-energize this circuit. Specifically, four circuit breakers 300 are provided, which can be respectively connected to external devices to achieve different functions such as deceleration and stopping.

[0038] Working principle: During use, an external transmission device is connected to the input shaft 400 and drives the input shaft 400 to rotate. When the input shaft 400 rotates, the first helical teeth 401 and the sixth gear 601 cooperate to drive the seventh gear 602 to rotate, and then the seventh gear 602 and the eighth gear 603 cooperate to drive the second shaft 604 to rotate. The rotation speed of the second shaft 604 is the same as that of the first helical teeth 401 (input shaft 400). At the same time, the rotation speed sensor 700 monitors the rotation speed of the second shaft 604 in real time and converts the monitored rotation speed into an electrical signal and uploads it to the controller 800. When the rotation speed of the second shaft 604 exceeds the set threshold, it means that the rotation speed of the input shaft 400 also exceeds the threshold. Then the controller 600 controls the power supply of the external transmission device to be turned off to avoid danger and improve safety.

[0039] Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A lifting limiter, comprising a lower housing (102) and an upper housing (101) fixedly installed on the lower housing (102). A partition plate (103) is fixedly installed at the upper end face of the inner cavity of the lower housing (102), and it is characterized in that: An input shaft (400) is rotatably installed inside the lower housing (102). The input shaft (400) is located at the middle position between the partition plate (103) and the bottom surface of the lower housing (102), and both ends of the input shaft (400) extend outside the lower housing (102). On one side of the input shaft (400) located inside the lower housing (102), a first helical tooth (401) and a second helical tooth (402) are provided on the surface. A sixth gear (601) meshing with the first helical tooth (401) is rotatably installed inside the lower housing (102). A seventh gear (602) is provided on the sixth gear (601). An eighth gear (603) meshing with the seventh gear (602) is rotatably installed on one side of the lower surface of the partition plate (103). A second shaft (604) extending above the partition plate (103) is provided at the center of the eighth gear (603). A speed sensor (700) is provided on the upper surface of the partition plate (103) corresponding to the position of the second shaft (604). The speed sensor (700) is used to monitor the rotation speed of the second shaft (604). A controller (800) is provided on one side of the upper surface of the partition plate (103). The controller (800) is electrically connected to the speed sensor (700).

2. The lifting limiter according to claim 1, characterized in that: A reduction device cooperating with the second helical tooth (402) is provided inside the lower housing (102). The reduction device drives a plurality of bumps (200). A protrusion (201) is provided on the bumps (200). A circuit breaker (300) is provided on one side of the bumps (200). The circuit breaker (300) is electrically connected to the controller (800).

3. The lifting limiter according to claim 2, characterized in that: A long wheel antenna (301) cooperating with the protrusion (201) is provided on the circuit breaker (300). The number of the circuit breakers (300) is equal to the number of the bumps (200), and the height of the long wheel antenna (301) on the circuit breaker (300) corresponds to the height of the protrusion (201).

4. The lifting limiter according to claim 2, characterized in that: The reduction device includes a first shaft (504) and a third shaft (900). Both the first shaft (504) and the third shaft (900) are rotatably installed between the bottom surface of the lower housing (102) and the partition plate (103), and the upper end of the third shaft (900) extends out of the partition plate (103). A plurality of the bumps (200) are fixedly sleeved with a first gear (501) meshing with the second helical teeth (402) through a mounting mechanism. A second gear (502) is fixedly installed below the first gear (501). Both the second gear (502) and the first gear (501) are sleeved on a third shaft (900) loosely. A fourth gear (505) and a fifth gear (506) are installed on the first shaft (504). Both the fourth gear (505) and the fifth gear (506) are sleeved on the first shaft (504) through flat keys. The fourth gear (505) meshes with the second gear (502). A sixth gear (601) meshes with a third gear (503). The third gear (503) is sleeved on the third shaft (900) at a position close to the partition plate (103) through a flat key.

5. The lifting limiter according to claim 4, characterized in that: The mounting mechanism includes a chassis, a partition ring and a top plate. The chassis is sleeved at the lowermost position of the protruding end of the third shaft (900). The bumps (200) and the partition ring are alternately sleeved above the protruding end in sequence. The top plate is sleeved above the protruding end. Threads are formed on the circumferential surface of the third shaft (900) near the upper end. A nut adapted to the threads is screwed on the threads.

6. The lifting limiter according to claim 5, wherein: The bump (200) has an annular structure. Internal teeth are provided on the inner annular surface thereof. A round hole is formed on the upper end surface of the top plate. An adjusting rod is installed in the round hole. The adjusting rod is vertically arranged downward. The diameter of the head of the adjusting rod is larger than the diameter of the round hole. An adjusting tooth is fixedly arranged at the bottom of the adjusting rod. The adjusting tooth meshes with the internal teeth.

7. The lifting limiter according to claim 2, characterized in that: The circuit breaker (300) uses a V-15-1B5 microswitch.

8. The lifting limiter according to claim 1, wherein: The first helical teeth (401), the sixth gear (601) and the second shaft (604) have the same diameter dimension. The seventh gear (602) and the eighth gear (603) have the same diameter dimension.

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