Limit adjusting mechanism of electric hoist

Abstract

The utility model belongs to the technical field of electric hoist accessories, and particularly relates to an electric hoist limit adjusting mechanism which comprises a speed reducer and a lifting limiter, the lifting limiter comprises a lifting limiter shell, a transversely-arranged fixing shaft is fixed in the lifting limiter shell, and a plurality of sets of limit mechanisms are arranged on the fixing shaft in a sleeved mode. The limiting mechanism comprises a first limiting disc, a first gear ring, a first sun gear, a first planetary gear carrier and a first planetary gear, an outer gear is arranged on the outer side of the first gear ring, the first limiting disc is fixedly connected with the first planetary gear carrier, and the speed reducer drives the first sun gear to rotate. An adjusting mechanism body is arranged on the lifting limiter, the adjusting mechanism body comprises an adjusting mechanism mounting shell, an adjusting screw rod is rotationally arranged in the adjusting mechanism mounting shell, the adjusting screw rod is meshed with the outer gear of the first gear ring and drives the first limiting disc to rotate, and an adjusting hole used for rotating the adjusting screw rod is formed in one end of the adjusting screw rod. The adjusting process is simple and rapid, and the accuracy is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric hoist accessories, in particular to a limit adjustment mechanism of an electric hoist. Background Art

[0002] Electric hoist is a special lifting equipment installed on overhead crane and gantry crane. It has the characteristics of small size, light weight, simple operation and easy use. The electric hoist has a compact structure, and the electric hoist with the motor axis perpendicular to the drum axis adopts a worm gear transmission device. The electric hoist is generally installed on single-beam crane, bridge crane, gantry crane, and suspension crane. With a little modification, it can also be used as a winch. Therefore, it is an essential equipment to improve labor efficiency and working conditions.

[0003] According to the use requirements of different scenarios, sometimes the electric hoist needs to stop at a certain height to meet the production and processing requirements, which is usually controlled by a limit device. However, the existing limit device has poor control accuracy and it is also cumbersome to adjust the limit position during use. Therefore, we provide an electric hoist limit adjustment mechanism with accurate limit and convenient adjustment. Utility Model Content

[0004] The purpose of the utility model is to solve the deficiencies of the prior art and to provide an electric hoist limit adjustment mechanism which has a simple structure, is convenient to adjust and can be precisely controlled.

[0005] The purpose of this utility model is solved by the following technical solutions:

[0006] 1. The electric hoist limit adjustment mechanism as claimed in claim 1, wherein the lift limiter comprises a lift limiter housing, a transversely arranged fixed shaft is fixed in the lift limiter housing, and a plurality of limit mechanisms are sleeved on the fixed shaft; the limit mechanism comprises a first planetary gear structure and a first limit plate, the first planetary gear structure comprises a first gear ring, a first sun gear, a first planetary gear carrier, and a first planetary gear, an external gear is arranged on the outer side of the first gear ring, the first limit plate is fixedly connected to the first planetary gear carrier, and the reducer drives the first sun gear to rotate; an adjustment mechanism body is arranged on the lift limiter, the adjustment mechanism body comprises an adjustment mechanism mounting shell, an adjusting screw is rotatably arranged in the adjustment mechanism mounting shell, the adjusting screw is meshed with the external gear of the first gear ring and drives the first limit plate to rotate, and an adjustment hole for rotating the adjusting screw is arranged at one end of the adjusting screw.

[0007] Based on the above structure, the first ring gear can be driven to rotate by rotating the adjusting screw, the first ring gear can drive the first planetary gear to rotate, and then drive the first planetary gear carrier to rotate, and the first planetary gear carrier can drive the first limit plate fixed thereto to rotate, so as to realize the adjustment of the limit position, and the adjustment process is simple, fast and highly accurate.

[0008] Preferably, one end of the adjusting screw is a head, the other end is a rotating shaft, and the middle is a thread. A circle of protrusions is provided between the head and the thread, and a circle of grooves is formed between the head and the protrusions. A mounting through hole matching the groove is opened on the adjusting mechanism mounting shell, and the adjusting screw is rotatably arranged on the adjusting mechanism mounting shell through the matching of the groove and the mounting through hole. A circular hole matching the rotating shaft is provided on the adjusting mechanism mounting shell, and the rotating shaft is rotatably arranged in the circular hole, and the thread is meshed with the outer gear of the first gear ring.

[0009] Optionally, the adjustment hole is a hexagonal hole.

[0010] Optionally, the adjustment hole is a cross hole.

[0011] Preferably, the outer ring of the first gear ring is provided with a circle of outer gear, the inner ring of the first gear ring is provided with a circle of inner gear, the first sun tooth is a long strip gear, the first sun tooth is sleeved on a fixed shaft, the first planetary gear frame is sleeved on the first sun tooth and is in the first gear ring, a plurality of first planetary gears are evenly arranged on the first planetary gear frame, the outer side of the first planetary gear is meshed with the inner gear of the first gear ring, and the inner side of the first planetary gear is meshed with the first sun tooth, the first limit plate is fixedly connected to the first planetary gear frame, a protruding first contact is provided on the outer side of the first limit plate, the height of the first contact is higher than the tooth top height of the outer gear of the first gear ring, and a micro switch matching the first contact is provided on the lifting limiter housing.

[0012] Preferably, the number of groups of the limiting mechanisms is 4 or more.

[0013] Preferably, the number of the first planetary gears is 3 or more.

[0014] Preferably, a second planetary gear structure is provided between the reducer and the limiting mechanism, and the second planetary gear structure includes a second ring gear, a second sun gear, a second planetary gear carrier, and a second planetary gear; the inner ring of the second ring gear is provided with a circle of internal gear, the second sun gear is a double gear, the second sun gear is sleeved on the fixed shaft, the second planetary gear carrier is sleeved on the outside of the second sun gear and is in the second ring gear, the second ring gear is fixedly connected to the lifting limiter housing, and a plurality of second planetary gears are evenly arranged on the second planetary gear carrier, the outer side of the second planetary gear is meshed with the inner gear of the second ring gear, the inner side of the second planetary gear is meshed with the gear with a smaller diameter of the second sun gear, the gear with a larger diameter of the second sun gear is transmission connected to the reducer, and the first sun gear is fixedly connected to the second planetary gear carrier.

[0015] Preferably, the number of the second planetary gears is 3 or more.

[0016] Preferably, the adjusting mechanism mounting housing and the lifting limiter housing are integrally formed.

[0017] Compared with the prior art, the utility model has the following characteristics and beneficial effects:

[0018] The utility model can drive the first gear ring to rotate by rotating the adjusting screw, the first gear ring drives the first planetary gear to rotate, and thus drives the first planetary gear frame to rotate, and the first planetary gear frame drives the first limit plate fixed thereto to rotate, thereby realizing the adjustment of the limit position, and the adjustment process is simple, fast and highly accurate.

[0019] The number of limit mechanisms is more than 4, the number of micro switches is the same as the number of limit mechanisms, and multiple groups of limit mechanisms can be flexibly set to multiple stop heights according to needs, with a wide range of applications.

[0020] The adjusting mechanism mounting housing and the lifting limiter housing are integrally formed, which improves the structural stability and thus provides working accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0022] Figure 2 It is a schematic diagram of the structure of the utility model from top view.

[0023] Figure 3 for Figure 2 AA section view of the structure.

[0024] Figure 4 for Figure 2 BB section structure diagram.

[0025] Figure 5It is a schematic diagram of the explosion structure of the limiting mechanism of the utility model.

[0026] Figure 6 This is a schematic diagram of the second planetary gear structure of the utility model.

[0027] In the figure: reducer 1, lifting limiter housing 2, fixed shaft 3, limit mechanism 4, first limit plate 5, first ring gear 6, first sun gear 7, first planetary gear carrier 8, first planetary gear 9, external gear 10, adjustment mechanism mounting shell 11, adjustment screw 12, adjustment hole 13, head 14, rotating shaft 15, thread 16, protrusion 17, groove 18, mounting through hole 19, circular hole 20, internal gear 21, first contact 22, micro switch 23, second ring gear 24, second sun gear 25, second planetary gear carrier 26, second planetary gear 27. DETAILED DESCRIPTION

[0028] The following will be combined with the attached Figure 1-6 The utility model is described in further detail.

[0029] An electric hoist limit adjustment mechanism, comprising a reducer 1 connected to the electric hoist, a lifting limiter connected to the reducer 1, the lifting limiter comprising a lifting limiter housing 2, a transversely arranged fixed shaft 3 fixed in the lifting limiter housing 2, a plurality of sets of limit mechanisms 4 sleeved on the fixed shaft 3; the limit mechanism comprising a first planetary gear structure and a first limit plate 5, the first planetary gear structure comprising a first gear ring 6, a first sun gear 7, a first planetary gear carrier 8, and a first planetary gear 9, an outer side of the first gear ring 6 is provided with an external gear 10, the first planetary gear 9 is provided with an outer gear 10, and the first planetary gear 9 is provided with an outer gear 10. The first limit plate 5 is fixedly connected to the first planetary gear carrier 8, and the reducer 1 drives the first sun gear 7 to rotate; the lifting limiter is provided with an adjusting mechanism body, and the adjusting mechanism body includes an adjusting mechanism mounting shell 11, and the adjusting mechanism mounting shell 11 is integrally formed with the lifting limiter shell 2, and an adjusting screw 12 is rotatably arranged in the adjusting mechanism mounting shell 11, and the adjusting screw 12 is meshed with the outer gear 10 of the first gear ring 6 and drives the first limit plate 5 to rotate, and an adjusting hole 13 for rotating the adjusting screw 12 is provided at one end of the adjusting screw 12.

[0030] The adjusting screw 12 has a head 14 at one end and a rotating shaft 15 at the other end, with a thread 16 in the middle. A circle of protrusions 17 is provided between the head 14 and the thread 16, and a circle of grooves 18 are formed between the head 14 and the protrusions 17. The adjusting mechanism mounting shell 11 is provided with a mounting through hole 19 that matches the groove 18. The adjusting screw 12 is rotatably arranged on the adjusting mechanism mounting shell 11 through the matching of the groove 18 and the mounting through hole 19. The adjusting mechanism mounting shell 11 is provided with a circular hole 20 that matches the rotating shaft 15. The rotating shaft 15 is rotatably arranged in the circular hole 20, and the thread 16 is meshed with the external gear 10 of the first gear ring 6. The adjusting hole 13 can be a hexagonal hole, a cross hole, a slotted hole, etc.

[0031] The specific structure of the first planetary gear structure is as follows: the outer ring of the first gear ring 6 is provided with a circle of outer gear 10, the inner ring of the first gear ring 6 is provided with a circle of inner gear 21, the first sun gear 7 is a long strip gear, the first sun gear 7 is sleeved on the fixed shaft 3, the first planetary gear frame 8 is sleeved on the first sun gear 7 and is located in the first gear ring 6, a plurality of first planetary gears 9 are evenly arranged on the first planetary gear frame 8, and the preferred number of the first planetary gears 9 is more than 3, the outer side of the first planetary gear 9 is meshed with the inner gear 21 of the first gear ring 6, and the inner side of the first planetary gear 9 is meshed with the first sun gear 7, the first limit plate 5 is fixedly connected to the first planetary gear frame 8, the outer side of the first limit plate 5 is provided with a protruding first contact 22, the height of the first contact 22 is higher than the tooth top height of the outer gear 10 of the first gear ring 6, and the lifting limiter housing 2 is provided with a micro switch 23 that cooperates with the first contact 22. Preferably, the number of groups of the limit mechanism is more than 4 groups.

[0032] Preferably, a second planetary gear structure is provided between the reducer 1 and the limiting mechanism, and the second planetary gear structure includes a second ring gear 24, a second sun gear 25, a second planetary gear carrier 26, and a second planetary gear 27; the inner ring of the second ring gear 24 is provided with a circle of internal gear 21, the second sun gear 25 is a double gear, the second sun gear 25 is sleeved on the fixed shaft 3, the second planetary gear carrier 26 is sleeved on the outside of the second sun gear 25 and is located in the second ring gear 24, the second ring gear 24 is fixedly connected to the lifting limiter housing 2, and a plurality of second planetary gears 27 are evenly provided on the second planetary gear carrier 26, and the preferred number of second planetary gears 27 is more than 3, the outer side of the second planetary gear 27 is meshed with the inner gear 21 of the second ring gear 24, and the inner side of the second planetary gear 27 is meshed with the gear with a smaller diameter of the second sun gear 25, the gear with a larger diameter of the second sun gear 25 is transmission connected to the reducer 1, and the first sun gear 7 is fixedly connected to the second planetary gear carrier 26.

[0033] The working process of this equipment is:

[0034] The electric hoist drives the reducer to work, and the reducer 1 drives the larger gear of the second sun gear 25 to rotate, and the smaller gear of the second sun gear 25 drives the second planetary gear 27 to rotate. Since the second ring gear 24 is fixedly connected to the lifting limiter housing 2, the second planetary gear 27 rotates on the internal gear of the second ring gear 24, and at the same time drives the second planetary gear carrier 26 and the first sun gear 7 fixed on the second planetary gear carrier 26 to rotate.

[0035] The first sun gear 7 drives the first planetary gear 9 to rotate. Since the outer gear 10 of the first gear ring 6 is limited by the adjusting screw 12, the first planetary gear 9 rotates on the inner gear 21 of the first gear ring 6, and at the same time drives the first planetary gear carrier 8 to rotate. The first planetary gear carrier 8 drives the first limit plate 5 fixedly connected thereto to rotate. When the first contact 22 on the first limit plate 6 contacts the micro switch 23, the electric hoist will stop at its set height to facilitate operation. Multiple sets of limit mechanisms 4 can each set a stop height to meet different production needs.

[0036] When the stopping height of the electric hoist needs to be adjusted, the adjusting screw 12 can be rotated by a tool corresponding to the hexagonal hole, the cross hole or the slotted hole. The adjusting screw 12 is meshed with the outer gear 10 of the first gear ring 6, driving the first gear ring 6 to rotate, and at the same time driving the first limit plate 5 to rotate until the first contact 22 reaches the specified position, thereby realizing the adjustment of the limit position. The adjustment process is simple, fast and accurate.

[0037] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An electric hoist limit adjustment mechanism, comprising a reducer connected to the electric hoist and a lifting limiter connected to the reducer, characterized in that: The lifting limiter includes a lifting limiter housing, a transversely arranged fixed shaft is fixed in the lifting limiter housing, and a plurality of limit mechanisms are sleeved on the fixed shaft; the limit mechanism includes a first planetary gear structure and a first limit plate, the first planetary gear structure includes a first ring gear, a first sun gear, a first planetary gear carrier, and a first planetary gear, an external gear is provided on the outer side of the first ring gear, the first limit plate is fixedly connected to the first planetary gear carrier, and the reducer drives the first sun gear to rotate; an adjusting mechanism body is provided on the lifting limiter, the adjusting mechanism body includes an adjusting mechanism mounting shell, an adjusting screw is rotatably provided in the adjusting mechanism mounting shell, the adjusting screw is meshed with the external gear of the first ring gear and drives the first limit plate to rotate, and an adjusting hole for rotating the adjusting screw is provided at one end of the adjusting screw.

2. The electric hoist limit adjustment mechanism according to claim 1, characterized in that: One end of the adjusting screw is a head, the other end is a rotating shaft, and the middle is a thread. A circle of protrusions is provided between the head and the thread, and a circle of grooves is formed between the head and the protrusions. A mounting through hole matching the groove is opened on the adjusting mechanism mounting shell. The adjusting screw is rotatably arranged on the adjusting mechanism mounting shell through the matching groove and the mounting through hole. A circular hole matching the rotating shaft is provided on the adjusting mechanism mounting shell. The rotating shaft is rotatably arranged in the circular hole, and the thread is meshed with the outer gear of the first gear ring.

3. The electric hoist limit adjustment mechanism according to claim 1, characterized in that: The adjusting hole is a hexagonal hole.

4. The electric hoist limit adjustment mechanism according to claim 1, characterized in that: The adjusting hole is a cross hole.

5. The electric hoist limit adjustment mechanism according to claim 1 or 2, characterized in that: The outer ring of the first gear ring is provided with a circle of outer gears, the inner ring of the first gear ring is provided with a circle of inner gears, the first sun tooth is a long strip gear, the first sun tooth is sleeved on a fixed shaft, the first planetary gear frame is sleeved on the first sun tooth and is in the first gear ring, a plurality of first planetary gears are evenly arranged on the first planetary gear frame, the outer side of the first planetary gear is meshed with the inner gear of the first gear ring, and the inner side of the first planetary gear is meshed with the first sun tooth, the first limit plate is fixedly connected to the first planetary gear frame, a protruding first contact is provided on the outer side of the first limit plate, the height of the first contact is higher than the tooth top height of the outer gear of the first gear ring, and a micro switch cooperating with the first contact is provided on the lifting limiter housing.

6. The electric hoist limit adjustment mechanism according to claim 5, characterized in that: The number of groups of the limiting mechanisms is more than 4.

7. The electric hoist limit adjustment mechanism according to claim 5, characterized in that: The number of the first planetary gears is 3 or more.

8. The electric hoist limit adjustment mechanism according to claim 5, characterized in that: A second planetary gear structure is provided between the reducer and the limiting mechanism, and the second planetary gear structure includes a second ring gear, a second sun gear, a second planetary gear carrier, and a second planetary gear; the inner ring of the second ring gear is provided with a circle of internal gear, the second sun gear is a double gear, the second sun gear is sleeved on the fixed shaft, the second planetary gear carrier is sleeved on the outside of the second sun gear and is in the second ring gear, the second ring gear is fixedly connected to the lifting limiter housing, and a plurality of second planetary gears are evenly arranged on the second planetary gear carrier, the outer side of the second planetary gear is meshed with the inner gear of the second ring gear, the inner side of the second planetary gear is meshed with the gear with a smaller diameter of the second sun gear, the gear with a larger diameter of the second sun gear is transmission connected to the reducer, and the first sun gear is fixedly connected to the second planetary gear carrier.

9. The electric hoist limit adjustment mechanism according to claim 8, characterized in that: The number of the second planetary gears is 3 or more.

10. The electric hoist limit adjustment mechanism according to claim 1, characterized in that: The adjusting mechanism mounting housing is integrally formed with the lifting limiter housing.

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