Lifting transmission device of electric hoist

Abstract

Compared with the prior art, the lifting transmission device of the electric hoist has the advantages that when the chain wheel is cleaned, the chain wheel can be cleaned only by detaching the protective shell, when the chain wheel is replaced, axial force is applied to the chain wheel after the protective shell is detached, and the chain wheel can be detached and replaced. The chain wheel maintenance device comprises a transmission device which comprises a vertically-arranged supporting plate, and further comprises a power device arranged on the first face of the supporting plate; the driving shaft is rotationally arranged on the supporting plate and is in transmission connection with a power device, and the driving shaft comprises a first end which extends out of the first surface and is positioned below the power device; the chain wheel is arranged at the first end in a sleeving manner; and the protective shell covers the periphery of the first end and is detachably arranged on the first surface.

Description

Technical Field

[0001] The utility model relates to the technical field of electric hoists, in particular to a lifting transmission device of an electric hoist. Background Art

[0002] The chain electric hoist is a kind of light and small equipment, which is applied to places such as processing workshops and storage docks. The existing chain electric hoist mainly has a power device and a lifting transmission device. The lifting transmission device includes a sprocket, and the chain is wound around the sprocket. During operation, the power device drives the sprocket to rotate, thereby driving the chain to move to achieve the purpose of lifting.

[0003] During operation, friction will occur between the sprocket and the chain. Therefore, the sprocket and the chain are consumable parts and need to be replaced after a certain period of use. And when the electric hoist is applied to scenarios with poor working environments such as metal sheet cutting workshops, the chain will inevitably adhere to the slag generated by metal sheet cutting. The slag will enter the grooves on the outer surface of the sprocket, and the slag will accelerate the wear of the sprocket and the chain, and needs to be cleaned regularly. Since the sprocket of the current chain electric hoist is arranged inside the main body, the main body needs to be disassembled when cleaning and maintaining the sprocket and replacing the sprocket, resulting in a large amount of maintenance work. Content of the Utility Model

[0004] The purpose of the utility model is to solve the above problems and provide a lifting transmission device of an electric hoist that is convenient for disassembling and maintaining the sprocket, so that the chain electric hoist can adapt to harsh working environments.

[0005] To achieve the above purpose, the technical solution of the utility model is: a lifting transmission device of an electric hoist, including a vertically arranged support plate, and further including:

[0006] A power device, arranged on the first surface of the support plate;

[0007] A driving shaft, rotatably arranged on the support plate and in transmission connection with the power device, including a first end extending out of the first surface and located below the power device;

[0008] A sprocket, sleeved on the first end;

[0009] A protective shell, covering the periphery of the first end, and detachably arranged on the first surface.

[0010] Further, a first support sleeve is arranged on the first surface around the driving shaft, a second support sleeve is arranged on the inner end surface of the protective shell, and both ends of the sprocket are respectively in rotational cooperation with the first support sleeve and the second support sleeve.

[0011] Further, it further includes a connecting plate arranged in parallel and spaced on the first surface. The connecting plate is detachably and fixedly connected to the support plate, and the protective shell is arranged on the connecting plate.

[0012] Further, a passing control for the endless chain to pass through is provided on the lower side wall of the protective shell.

[0013] Further, through holes are provided at the four corner positions of the connecting plate, four fixing rods corresponding to the through holes one by one are provided on the first surface, a support sleeve is sleeved on each fixing rod, the support sleeve is located between the connecting plate and the first surface, and an extrusion surface is provided at one end of the fixing rod extending out of the through hole, and the extrusion surface faces the connecting plate.

[0014] Further, a first gear is provided on the output shaft of the power device, a second gear is provided at the other end of the driving shaft, an intermediate gear is rotatably provided on the support plate, and the intermediate gear is in transmission connection with the first gear and the second gear.

[0015] Further, an intermediate shaft is integrally provided on the support plate, and the intermediate gear is rotatably provided on the intermediate shaft.

[0016] Compared with the prior art, the lifting transmission device of the electric hoist disclosed by the present utility model has the following beneficial effects: when cleaning the sprocket, only the protective shell needs to be disassembled to clean the sprocket; when replacing the sprocket, after disassembling the protective shell, applying an axial force to the sprocket can remove the sprocket for replacement, so as to facilitate the maintenance and disassembly of the sprocket. It includes a transmission device, including a vertically arranged support plate, and further includes: a power device arranged on the first surface of the support plate; a driving shaft rotatably arranged on the support plate and in transmission connection with the power device, including a first end extending out of the first surface and located below the power device; a sprocket sleeved on the first end; a protective shell covering the periphery of the first end and detachably arranged on the first surface. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the lifting transmission device of the electric hoist of the present utility model.

[0018] Figure 2 It is a schematic structural diagram of the lifting transmission device of the electric hoist of the present utility model with the protective shell omitted.

[0019] Figure 3 It is a schematic structural diagram of the lifting transmission device of the electric hoist of the present utility model with the sprocket and the connecting plate omitted.

[0020] Figure 4 It is a schematic side view structural diagram of the lifting transmission device of the electric hoist of the present utility model.

[0021] Figure 5 It is a schematic cross-sectional structural diagram of the lifting transmission device of the electric hoist of the present utility model.

[0022] In the figure: 1. Support plate; 11. First support cylinder; 12. Connecting plate; 13. Fixed rod; 131. Extrusion surface; 14. Support sleeve; 15. Locking nut; 16. Intermediate shaft; 17. Intermediate gear; 2. Power device; 21. First gear; 3. Drive shaft; 31. Spline groove; 32. Second gear; 4. Sprocket; 41. Shaft body; 5. Protective housing; 51. Second support cylinder; 55. Through hole; 6. Second housing. Detailed implementation mode

[0023] Now, the present utility model will be further described in detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, which only illustrate the basic structure of the present utility model in a schematic manner. Therefore, they only show the components related to the present utility model.

[0024] Please refer to Figures 1-5 , the technical solution of the present utility model is: a lifting transmission device of an electric hoist, including a vertically arranged support plate 1, and further including:

[0025] A power device 2, arranged on the first surface of the support plate 1;

[0026] A drive shaft 3, rotatably arranged on the support plate 1 and in transmission connection with the power device 2, including a first end extending out of the first surface and located below the power device 2;

[0027] A sprocket 4, sleeved on the first end;

[0028] A protective housing 5, covering the periphery of the first end and detachably arranged on the first surface.

[0029] As a specific implementation mode, the power device 2 adopts a drive motor. The output shaft of the drive motor is in driving connection with the drive shaft 3, so as to drive the drive shaft 3 to rotate around its axis. A spline groove 31 is arranged at the first end of the drive shaft 3. The sprocket 4 is sleeved on the first end and is in driving connection with the first end of the drive shaft through a spline. The sprocket 4 is driven to rotate by the drive shaft 3. By arranging the protective housing 5 on the first surface, the sprocket is protected by the protective housing 5 and axially limited. In this way, when cleaning the sprocket, only the protective housing 5 needs to be disassembled to clean the sprocket. When replacing the sprocket, after disassembling the protective housing, an axial force is applied to the sprocket, and the sprocket can be removed for replacement.

[0030] Furthermore, as a specific implementation mode, referring to Figures 3-5 , a first support cylinder 11 is arranged on the first surface around the drive shaft. A second support cylinder 51 is arranged on the inner end surface of the protective housing 5. The two ends of the sprocket 4 are respectively in rotational cooperation with the first support cylinder 11 and the second support cylinder 51.

[0031] Specifically, one end of the sprocket is provided with a shaft body 41, a first bearing is sleeved on the shaft body, and the other end is provided with a mounting sleeve. A second bearing is sleeved on the outer periphery of the mounting sleeve. With this setting method, during assembly, the sprocket can be first sleeved on the first end of the drive shaft, the second bearing can be sleeved on the mounting sleeve, and the second bearing can be installed in the first support cylinder 11. The first support cylinder is provided with a bearing seat; and the first bearing is sleeved on the outer periphery of the shaft body 41, and then the protective shell is installed. The second support cylinder is provided with a bearing seat. When the protective shell is installed in place, the first bearing can be installed in the second support cylinder 51. With this setting method, the sprocket 4 can be supported by the protective shell and the first support cylinder, and at the same time supported by the drive shaft, achieving a better support effect.

[0032] Further, as a preferred embodiment, refer to Figures 3-5 , it further includes a connecting plate 12 arranged parallel and spaced apart from the first surface. The connecting plate 12 is detachably and fixedly connected to the support plate 1, and the protective shell 5 is arranged on the connecting plate 12.

[0033] Specifically, by arranging the connecting plate 12 at an interval from the first surface and setting the protective shell on the connecting plate, with this setting method, the installation distance between the protective shell and the first surface can be adjusted by adjusting the gap between the connecting plate 12 and the first surface, so as to avoid the protective shell clamping the sprocket too tightly or having too large a gap between the sprockets, ensuring the assembly accuracy.

[0034] Further, as a specific embodiment, a through hole 55 for the endless chain to pass through is provided on the lower side wall of the protective shell 5. Specifically, during actual use, an endless chain guide (not shown in the figure) corresponding to the through hole is also provided on the protective shell to guide the endless chain.

[0035] Further, as a specific embodiment, refer to Figures 1-5 , the connection method between the connecting plate 12 and the support plate 1 is: through holes are provided at the four corner positions of the connecting plate 12, and four fixing rods 13 corresponding to the through holes one by one are provided on the first surface. A support sleeve 14 is sleeved on each fixing rod 13. The support sleeve 14 is located between the connecting plate and the first surface. An extrusion surface 131 is provided at the end of the fixing rod 13 extending out of the through hole, and the extrusion surface 131 faces the connecting plate.

[0036] Specifically, as a specific implementation manner, one end of the fixing rod 13 is connected to the support plate 1 by either welding or threaded connection. The other end is provided with an external thread. When installing the connecting plate 12, first place the fixing rod on the support plate, then sleeved the support sleeve 14 on the fixing rod 13, align the through hole on the connecting plate with the fixing rod 13, and then lock the end of the fixing rod with the locking nut 15 to lock the connecting plate. At this time, the pressing surface 131 is the end face of the locking nut 15. When it is necessary to adjust the distance between the connecting plate and the first surface, it can be adjusted by using support sleeves 14 with different axial lengths.

[0037] In another implementation manner, the mounting plate is provided with threaded holes. The fixing rod 13 is a locking screw with an end cap. During installation, first insert the locking screw into the through hole on the connecting plate, then sleeved the support sleeve 14 on the locking screw, and then lock each of the four locking screws with the threaded holes on the mounting plate. At this time, the pressing surface 131 is the end face of the end cap of the locking screw.

[0038] Furthermore, as a specific implementation manner, a first gear 21 is provided on the output shaft of the power device 2, a second gear 32 is provided at the other end of the drive shaft 3, and an intermediate gear 17 is rotatably provided on the support plate 1. The intermediate gear is in transmission connection with the first gear and the second gear.

[0039] Specifically, the power device 2 is a drive motor. The output shaft of the drive motor is provided with the first gear. The first gear drives the second gear 32 to rotate through the intermediate gear 17, and the second gear drives the drive shaft 3 to rotate. Preferably, a second housing 6 is provided on the side of the support plate 1 opposite to the first surface to protect the transmission gears through the second housing 6.

[0040] Furthermore, as a specific implementation manner, refer to Figure 5 , an intermediate shaft 16 is integrally provided on the support plate 1, and the intermediate gear 17 is rotatably provided on the intermediate shaft 16. Specifically, the intermediate shaft 16 can be processed by means such as welding and integral casting.

[0041] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A lifting transmission device for an electric hoist, comprising a vertically arranged support plate (1), characterized in that: Also includes: A power device (2) is arranged on the first surface of the support plate (1); A drive shaft (3) rotatably disposed on the support plate (1) and drivingly connected to the power device (2), comprising a first end extending out of the first surface and located below the power device (2); A sprocket (4) sleeved on the first end; A protective shell (5) is arranged to cover the periphery of the first end and is detachably arranged on the first surface.

2. The lifting transmission device of the electric hoist according to claim 1, characterized in that: A first support cylinder (11) is arranged on the first surface around the drive shaft, a second support cylinder (51) is arranged on the inner end surface of the protective shell (5), and two ends of the sprocket (4) are rotatably engaged with the first support cylinder (11) and the second support cylinder (51), respectively.

3. The lifting transmission device of the electric hoist according to claim 1, characterized in that: It also comprises a connecting plate (12) arranged in parallel and at intervals on the first surface, the connecting plate (12) being detachably fixedly connected to the supporting plate (1), and the protective shell (5) being arranged on the connecting plate (12).

4. The lifting transmission device of the electric hoist according to claim 3, characterized in that: A through hole (55) for the chain to pass through is provided on the lower side wall of the protective shell (5).

5. The lifting transmission device of the electric hoist according to claim 3, characterized in that: Through holes are provided at the four corners of the connecting plate (12); four fixing rods (13) are provided on the first surface and are arranged one-to-one in correspondence with the through holes; each of the fixing rods (13) is sleeved with a support sleeve (14); the support sleeve (14) is located between the connecting plate and the first surface; an extrusion surface (131) is provided at one end of the fixing rod (13) extending out of the through hole; the extrusion surface (131) is arranged facing the connecting plate.

6. The lifting transmission device of the electric hoist according to claim 1, characterized in that: The output shaft of the power device (2) is provided with a first gear (21), the other end of the drive shaft (3) is provided with a second gear (32), and an intermediate gear (17) is rotatably provided on the support plate (1), the intermediate gear being transmission-connected to the first gear and the second gear.

7. The lifting transmission device of the electric hoist according to claim 6, characterized in that: An intermediate shaft (16) is integrally arranged on the support plate (1), and the intermediate gear (17) is rotatably arranged on the intermediate shaft (16).

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