Fast and slow dual-purpose chain hoist

Abstract

The utility model discloses a fast and slow dual-purpose chain hoist which comprises an upper lifting hook assembly, a lower lifting hook assembly, a loop chain and a driving assembly, and the driving assembly comprises a first transmission system and a second transmission system which respectively correspond to a heavy load working condition and a light load working condition. The first operation part drives the gear structure to decelerate, so that the heavy object is lifted stably; and the second transmission gear shaft is directly driven by the second operation part, so that the light object is quickly hoisted. The transition gear shaft is arranged to optimize the transmission path and the structural layout, the overall strength and reliability are effectively improved, fast and slow mode switching is achieved, operation efficiency and operation convenience are both considered, and the device has the advantages of being compact in structure, convenient to install and maintain, flexible to modify and the like and is suitable for various hoisting requirement scenes.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ring chain hoist, especially relates to a fast and slow dual-purpose ring chain hoist. BACKGROUND

[0002] The ring chain hoist is a common small hoisting equipment, which is widely used in factory buildings, construction sites, warehousing logistics and assembly operations and other scenes, and is used for lifting, carrying and position adjustment of objects. According to the different driving modes, the ring chain hoist can be divided into hand chain hoist, electric chain hoist and pneumatic chain hoist. Among them, the hand chain hoist is still widely used in various light lifting occasions due to its simple structure, low cost, flexible operation and other characteristics.

[0003] The traditional hand chain hoist usually relies on the manual pulling of the operator to pull the chain, and realizes the lifting or lowering of the object through the mechanical transmission structure. Although this way is intuitive and does not need external power source, in the operation of frequent lifting or lifting heavy objects, manual operation not only has low efficiency, but also causes operator fatigue, and even causes safety hazards. Especially in high-altitude operation, narrow space or special operation environment, its adaptability and efficiency are limited.

[0004] In order to improve the operation efficiency and reduce the labor burden, some technicians try to introduce electric tools to modify the traditional hand chain hoist. For example, the electric pistol drill is used to replace the manual chain operation, and the sleeve type wrench is used to drive the transmission mechanism inside the chain hoist, so as to realize automatic lifting. This way mainly outputs stable torque through the electric motor of the pistol drill, and transmits power to the driving part (such as sprocket or shaft sleeve) of the chain hoist through the connected sleeve wrench, to complete the lifting action.

[0005] The technical scheme has the following obvious advantages:

[0006] Reduce labor intensity: the pistol drill provides stable power output, replaces manual operation, and effectively relieves operator fatigue;

[0007] Improve operation efficiency: electric drive responds quickly and lifts fast, which is suitable for repetitive and high-frequency operation;

[0008] Flexible and convenient modification: without changing the structure of the chain hoist, only through the standard connecting piece (such as sleeve wrench) can the quick assembly and disassembly be realized.

[0009] However, the existing technology still has certain limitations. Taking the currently common "pistol drill driven chain hoist" device as an example, its rated lifting capacity is generally about 1.5 tons, and its speed is single when lifting objects of different weights, which cannot be automatically adjusted according to the load. For example, when lifting heavy objects, the lifting speed is relatively moderate, which can ensure safety; but when lifting light objects, the lifting speed remains unchanged, which is too slow, not only wastes operation time, but also affects the overall work efficiency.

[0010] Therefore, how to switch the lifting speed according to the load weight while keeping the advantages of the existing structure, so as to balance the work efficiency and the use safety, has become one of the problems to be solved in the current technical field. The utility model discloses

[0011] The utility model discloses want to solve the technical problem to the deficiency of the existing ring chain hoist, provide a convenient to use, according to the load weight switching lifting speed, while giving consideration to work efficiency and use safety's fast and slow dual -purpose ring chain hoist.

[0012] In order to achieve the above object, the technical scheme of the utility model is as follows:

[0013] A fast and slow dual-purpose ring chain hoist, including upper hanger hook assembly, lower hanger hook assembly, ring chain and the drive assembly of setting on the drive of ring chain of upper hanger hook assembly, the ring chain is around setting on the drive assembly, the drive assembly is set on the upper hanger hook assembly, the drive assembly includes the first wallboard and second wallboard that are connected with each other, the front cover of setting on the first wallboard outer side, the rear cover of setting on the second wallboard outer side, the first gear shaft of setting on the first wallboard and front cover, the second gear shaft that passes through the first wallboard and second wallboard, drive mechanism that drives ring chain and with the second gear shaft cooperation and drive mechanism of the conduction mechanism of leading, the first gear shaft includes the first transmission gear shaft, the first transmission gear of setting on the first transmission gear shaft and first operation part, the second gear shaft includes the second transmission gear shaft and the second transmission gear of setting on the second transmission gear shaft, the first transmission gear is with the second transmission gear cooperation, the ring chain hoist still includes the light load power input part of setting on the second transmission gear shaft, the light load power input part includes the fixed seat of with the second transmission gear fixed connection and the second operation part of setting on the fixed seat, the first transmission gear and second transmission gear all are set in the first wallboard and front cover, the first operation part and the second operation part all extend the front cover.

[0014] Second transmission gear shaft, namely the long shaft, sets the light load power input part on the second transmission gear shaft, can directly control the second transmission gear shaft through the power input part, the second transmission gear shaft controls the conduction mechanism, the conduction mechanism controls the drive mechanism, so as to realize the quick lifting of light object, generally, light object is within 600kg, all can be controlled the second operation part and be lifted quickly, save time.

[0015] Further, the ring chain hoist further comprises a transition gear shaft; the transition gear shaft comprises a transition transmission gear shaft and a transition transmission gear arranged on the transition transmission gear shaft; the first transmission gear is engaged with the transition transmission gear, and the transition transmission gear is engaged with the second transmission gear; and the transition transmission gear is arranged in the first wallboard and the front cover.

[0016] By setting the transition gear shaft, the first transmission gear shaft and the second transmission gear shaft can be effectively pulled apart, because the ends of the first transmission gear shaft and the second transmission gear shaft are arranged on the front cover. If the transition gear shaft is not set, the first transmission gear shaft and the second transmission gear shaft are too close, which reduces the strength of the front cover. When the sleeve type wrench is operated on the first operating part or the second operating part through the hand gun drill, the front cover is easily deformed, which affects the service life of the ring chain hoist.

[0017] Further preferably, one end of the first transmission gear shaft is arranged on the front cover through a bearing, and the other end is arranged on the first wall plate through a sleeve; one end of the transition transmission gear shaft is arranged on the front cover through a bearing, and the other end is arranged on the first wall plate through a sleeve. The other end of the first transmission gear shaft and the transition transmission gear shaft can also be arranged on the first wall plate through a bearing.

[0018] Further, the fixing seat is disc type and is fixedly connected to the side of the second transmission gear close to the front cover through a bolt; the second operating part is coaxially arranged with the second transmission shaft.

[0019] Further, a groove for accommodating the end of the second transmission shaft is further arranged in the middle of the fixing seat.

[0020] Further, the driving mechanism includes a chain guide box arranged below the second wall plate and the first wall plate and a sprocket arranged in the chain guide box; the sprocket is sleeved on the second transmission shaft; the ring chain is arranged on the sprocket, and its outside is limited by the chain guide box.

[0021] Further, the transmission mechanism includes a sheet gear set, and the sprocket is provided with a sprocket shaft; the sheet gear set is arranged in the rear cover and the second wall plate, and cooperates with the end of the second transmission shaft passing through the second wall plate, and the sheet gear set cooperates with the sprocket shaft.

[0022] Further, a ratchet structure for braking is further sleeved on the second transmission shaft, and the ratchet structure is arranged between the first wall plate and the second transmission gear. The ratchet structure is used for braking of the second transmission shaft, which avoids load reverse sliding and improves safety during use.

[0023] The utility model discloses a principle is: when needing through ring chain hoist to lift heavy object, can through the sleeve wrench rotation and stretch the first operation part of front cover, first transmission gear on the first transmission axle is engaged with transition transmission gear, and transition transmission gear is engaged with second transmission gear, and through the reduction of the number of teeth ratio, thereby lifting heavy object. When needing through ring chain hoist to lift light object, can through the sleeve wrench rotation and stretch the second operation part of front cover, and the second operation part drives the coaxial synchronous rotation of second transmission axle, and directly skips the transmission ratio relation between first transmission gear and second transmission gear, thereby can quickly lift light object, when needing to lengthen the chain that gathers, also can through the operation second operation part, and the quick realization of reverse rotation second operation part.

[0024] The utility model discloses the beneficial effect is:

[0025] 1, realize fast and slow double mode switching, promote operation efficiency and flexibility: the utility model discloses through setting up double operation parts, realized the speed switching function under different load conditions, when hoisting heavy object, through the gear reduction transmission path (first operation part) with lower speed, safe and stable to complete the promotion, when hoisting light object, through direct drive path (second operation part) with higher speed, complete the operation quickly and efficiently, significantly improve operation efficiency.

[0026] 2, reduce the human burden, promote the operation convenience: through the combination of electric pistol drill and sleeve wrench replaces traditional hand-pulling mode, effectively alleviates the physical burden of operator, reduces fatigue, especially applicable to high-frequency, repetitive hoisting operation.

[0027] 3, structural optimization, improve the reliability of whole machine: set up transition gear axle, make first, second transmission axle can be distributed reasonably, avoid arranging too compact and cause the stress concentration of front cover, effectively enhance structural strength, improve the durability and service life of whole machine.

[0028] 4, easy to modify, strong compatibility: the utility model discloses on the basis of keeping the original gourd body structure unchanged, only through the optimization of driving assembly, can realize fast and slow dual-purpose function, has good modification and market promotion value.

[0029] 5, compact structure, convenient to maintain and install: each transmission axle is supported reasonably through bearing or sleeve, and rotation is stable, convenient to maintain, and two operation parts are all arranged on the outer side of front cover, and operation is intuitive and easy to master, which is convenient for on-site operating personnel to use quickly. BRIEF DESCRIPTION OF DRAWINGS

[0030] Briefly describe the content expressed by each drawing of the specification and the marks in the drawing:

[0031] Figure 1 It is the perspective view of the embodiment ring chain gourd;

[0032] Figure 2 Figure 1 is a perspective view of the drive assembly of the embodiment;

[0033] Figure 3 Figure 2 is a perspective view of the drive assembly after removal of the front cover; Figure 2

[0034] Figure 4 Figure 3 is an exploded view of the drive assembly; Figure 3

[0035] Figure 5 Figure 4 is a plan view of the drive assembly of the embodiment;

[0036] Figure 6 Figure 5 is a sectional view taken along line A-A in Figure 4; Figure 5 Figure 6 is a sectional view taken along line B-B in Figure 4;

[0037] Figure 7 is a sectional view taken along line C-C in Figure 4;

[0038] 1 is the upper hook assembly;

[0039] 2 is the lower hook assembly;

[0040] 3 is the endless chain;

[0041] 4 is the drive assembly; 4-1 is the first wall plate; 4-2 is the second wall plate; 4-3 is the front cover; 4-4 is the rear cover;

[0042] 5 is the first gear shaft; 5-1 is the first transmission gear shaft; 5-2 is the first transmission gear; 5-3 is the first operation part;

[0043] 6 is the second gear shaft; 6-1 is the second transmission gear shaft; 6-2 is the second transmission gear;

[0044] 7 is the light load power input part; 7-1 is the fixed seat; 7-2 is the second operation part;

[0045] 8 is the transition gear shaft; 8-1 is the transition transmission gear shaft; 8-2 is the transition transmission gear;

[0046] 9 is the chain guide box;

[0047] 10 is the sprocket;

[0048] 11 is the sheet gear set;

[0049] 12 is the sprocket shaft;

[0050] 13 is the ratchet structure. DETAILED DESCRIPTION

[0051] ​​The utility model will be further described below in conjunction with the drawings of a non-limiting embodiment. However, it should be understood that these descriptions are only examples and are not intended to limit the scope of the utility model. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model. Embodiment

[0052] As Figure 1 shown, a fast and slow dual-purpose ring chain hoist, including upper lifting hook assembly 1, lower lifting hook assembly 2, ring chain 3 and the drive assembly 4 for driving ring chain 3 arranged on the upper lifting hook assembly 1;Ring chain 3 is arranged around the drive assembly 4, and the drive assembly 4 is arranged on the upper lifting hook assembly 1;As Figure 2 、 3 , 4 shows that the drive assembly 4 includes the first wallboard 4-1 and the second wallboard 4-2 connected with each other, the front cover 4-3 arranged on the outer side of the first wallboard 4-1, the rear cover 4-4 arranged on the outer side of the second wallboard 4-2, the first gear shaft 5 arranged on the first wallboard 4-1 and the front cover 4-3, the second gear shaft 6 passing through the first wallboard 4-1 and the second wallboard 4-2, the drive mechanism for driving ring chain 3 and the transmission mechanism matched with the second gear shaft 6 and driving the drive mechanism;The first gear shaft 5 includes the first transmission gear shaft 5-1, the first transmission gear 5-2 arranged on the first transmission gear shaft 5-1 and the first operation part 5-3;The second gear shaft 6 includes the second transmission gear shaft 6-1 and the second transmission gear 6-2 arranged on the second transmission gear shaft 6-1;As Figure 5 、 6 shown, the drive mechanism includes the chain guide box 9 arranged below the second wallboard 4-2 and the first wallboard 4-1 and the sprocket 10 arranged in the chain guide box 9;The sprocket 10 is sleeved on the second transmission gear shaft 6-1;Ring chain 3 is arranged around the sprocket 10, and its outside is limited by the chain guide box 9;The transmission mechanism includes the sheet gear set 11, and the sprocket 10 is provided with the sprocket shaft 12;The sheet gear set 11 is arranged in the rear cover 4-4 and the second wallboard 4-2, and is matched with the end of the second transmission gear shaft 6-1 passing through the second wallboard 4-2, and the sheet gear set 11 is matched with the sprocket shaft 12. As Figure 3 、 4 shown, the second transmission gear shaft 6-1 is also sleeved with the ratchet structure 13 for braking, and the ratchet structure 13 is arranged between the first wallboard 4-1 and the second transmission gear 6-2.

[0053] As Figure 3 、 4As shown in the drawings, the ring chain hoist further comprises a light load power input part 7 arranged on the second transmission gear shaft 6-1; the light load power input part 7 comprises a fixed seat 7-1 fixedly connected with the second transmission gear 6-2 and a second operation part 7-2 arranged on the fixed seat 7-1; the first transmission gear 5-2 cooperates with the second transmission gear 6-2, and both the first transmission gear 5-2 and the second transmission gear 6-2 are arranged in the first wall plate 4-1 and the front cover 4-3, and both the first operation part 5-3 and the second operation part 7-2 extend out of the front cover 4-3.

[0054] As shown in the drawings, Figure 3 , 4 As shown in the drawings, the ring chain hoist further comprises a transition gear shaft 8; the transition gear shaft 8 comprises a transition transmission gear shaft 8-1 and a transition transmission gear 8-2 arranged on the transition transmission gear shaft 8-1; the first transmission gear 5-2 is engaged with the transition transmission gear 8-2, the transition transmission gear 8-2 is engaged with the second transmission gear 6-2, and the transition transmission gear 8-2 is arranged in the first wall plate 4-1 and the front cover 4-3. One end of the first transmission gear shaft 5-1 is arranged on the front cover 4-3 through a bearing, and the other end is arranged on the first wall plate 4-1 through a sleeve; one end of the transition transmission gear shaft 8-1 is arranged on the front cover 4-3 through a bearing, and the other end is arranged on the first wall plate 4-1 through a sleeve. The other end of the first transmission gear shaft 5-1 and the transition transmission gear shaft 8-1 can also be arranged on the first wall plate 4-1 through a bearing. The fixed seat 7-1 is disc-shaped and fixedly connected to the second transmission gear 6-2 near the front cover 4-3 through a bolt; the second operation part 7-2 is coaxially arranged with the second transmission gear shaft 6-1. As shown in the drawings, Figure 6 A groove accommodating the end of the second transmission gear shaft 6-1 is further arranged in the middle of the fixed seat 7-1.

[0055] As shown in the drawings, Figure 1 , 2 When the ring chain hoist of the embodiment is used to lift a heavy object, a pistol drill cooperates with a first operation part 5-3 of an outer hexagonal structure through an internal hexagonal sleeve wrench, as shown in the drawings, Figure 3 , 4 The first transmission gear 5-2 is engaged with the transition transmission gear 8-2, the transition transmission gear 8-2 is engaged with the second transmission gear 6-2 and drives the second transmission gear shaft 6-1 to rotate, as shown in the drawings, Figure 5 , 6 The second transmission gear shaft 6-1 cooperates with a sector gear set 11, the sector gear set 11 drives a sprocket shaft 12 to rotate, the sprocket shaft 12 drives a sprocket 10 to rotate, thereby driving the ring chain 3 to be retracted. In this way, the first transmission gear 5-2, the transition transmission gear 8-2 and the second transmission gear 6-2 form a first transmission system, the speed ratio of which is changed, the rotation speed of the second transmission gear 6-2 is reduced, and the torque is increased, thereby lifting the heavy object.

[0056] AsFigure 1 、 2 As shown in FIG. 7, when lifting a light object with the endless chain hoist of the present embodiment, the operator directly drives the second transmission gear shaft 6-1 by the second operation part 7-2, and the power is directly input to the second transmission gear shaft 6-1, thereby forming a second transmission system. Figure 3 、 4 As shown in FIG. 7, when lifting a light object with the endless chain hoist of the present embodiment, the operator directly drives the second transmission gear shaft 6-1 by the second operation part 7-2, and the power is directly input to the second transmission gear shaft 6-1, thereby forming a second transmission system.

[0057] Since the required lifting torque is small under light load, the resistance overcome by the operator when pulling the endless chain 3 is low, and the torsional spring of the ratchet structure 13 can ensure that the pawl is continuously engaged with the ratchet, thereby ensuring stable and efficient transmission of the entire transmission path. At the same time, the meshing cooperation between the sprocket 10 and the endless chain 3 ensures that the endless chain 3 can still run smoothly under high-speed operation, without slipping or tooth skipping, and the lifting process is safe and stable. In this mode, the transmission path is simple and the power transmission is direct, thereby minimizing the intermediate speed reduction links, thereby greatly improving the lifting speed, especially suitable for scenarios where light materials are frequently lifted, effectively improving the work efficiency and reducing the labor intensity of the operator.

[0058] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and not to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, if the terms "first", "second" and the like appear, they are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0059] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, if appearing term "installation", "link", "connection", should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication。For ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

Claims

1. A dual-purpose chain hoist, comprising an upper hook assembly (1), a lower hook assembly (2), a chain (3), and a drive assembly (4) arranged on the upper hook assembly (1) to drive the chain (3); the chain (3) is arranged around the drive assembly (4), and the drive assembly (4) is arranged on the upper hook assembly (1); the drive assembly (4) comprises a first wall plate (4-1) and a second wall plate (4-2) connected to each other, a front cover (4-3) arranged on the outer side of the first wall plate (4-1), a rear cover (4-4) arranged on the outer side of the second wall plate (4-2), a first gear shaft (5) arranged on the first wall plate (4-1) and the front cover (4-3), a second gear shaft (6) penetrating the first wall plate (4-1) and the second wall plate (4-2), a drive mechanism to drive the chain (3), and a transmission mechanism cooperating with the second gear shaft (6) to drive the drive mechanism; the first gear shaft (5) comprises a first transmission gear shaft (5-1), a first transmission gear (5-2) arranged on the first transmission gear shaft (5-1), and a first operation part (5-3); the second gear shaft (6) comprises a second transmission gear shaft (6-1) and a second transmission gear (6-2) arranged on the second transmission gear shaft (6-1); the first transmission gear (5-2) cooperates with the second transmission gear (6-2); characterized in that The chain hoist further comprises a light-load power input part (7) arranged on the second transmission gear shaft (6-1); the light-load power input part (7) comprises a fixed seat (7-1) fixedly connected with the second transmission gear (6-2), and a second operation part (7-2) arranged on the fixed seat (7-1); the first transmission gear (5-2) and the second transmission gear (6-2) are arranged in the first wall plate (4-1) and the front cover (4-3), and the first operation part (5-3) and the second operation part (7-2) both extend out of the front cover (4-3).

2. A dual speed endless chain hoist as claimed in claim 1, characterized in that, The chain hoist further comprises a transition gear shaft (8); the transition gear shaft (8) comprises a transition transmission gear shaft (8-1) and a transition transmission gear (8-2) arranged on the transition transmission gear shaft (8-1); the first transmission gear (5-2) is engaged with the transition transmission gear (8-2), and the transition transmission gear (8-2) is engaged with the second transmission gear (6-2); the transition transmission gear (8-2) is arranged in the first wall plate (4-1) and the front cover (4-3).

3. A dual speed endless chain hoist as claimed in claim 2, characterized in that, One end of the first transmission gear shaft (5-1) is arranged on the front cover (4-3) through a bearing, and the other end is arranged on the first wall plate (4-1) through a sleeve; one end of the transition transmission gear shaft (8-1) is arranged on the front cover (4-3) through a bearing, and the other end is arranged on the first wall plate (4-1) through a sleeve.

4. The dual speed endless chain hoist according to claim 1, wherein, The fixed seat (7-1) is disc-shaped and fixedly connected to the second transmission gear (6-2) near the front cover (4-3) through bolts; the second operation part (7-2) is coaxially arranged with the second transmission gear shaft (6-1).

5. A dual speed endless chain hoist as claimed in claim 4, characterized in that, A groove accommodating the end of the second transmission gear shaft (6-1) is further arranged in the middle of the fixed seat (7-1).

6. A dual speed endless chain hoist as claimed in claim 1, wherein, The driving mechanism comprises a chain guide box (9) arranged below the second wall plate (4-2) and the first wall plate (4-1) and a chain wheel (10) arranged in the chain guide box (9); the chain wheel (10) is sleeved on the second transmission gear shaft (6-1); the endless chain (3) is arranged around the chain wheel (10) and its outer part is limited by the chain guide box (9).

7. A dual speed endless chain hoist as claimed in claim 6, characterized in that, The transmission mechanism comprises a plate gear set (11), the chain wheel (10) is provided with a chain wheel shaft (12); the plate gear set (11) is arranged in the rear cover (4-4) and the second wall plate (4-2) and cooperates with the end part of the second transmission gear shaft (6-1) penetrating through the second wall plate (4-2), the plate gear set (11) cooperates with the chain wheel shaft (12).

8. The dual speed endless chain hoist according to claim 1, wherein, A ratchet structure (13) for braking is also sleeved on the second transmission gear shaft (6-1), the ratchet structure (13) is arranged between the first wall plate (4-1) and the second transmission gear (6-2).

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