Semi-sealed chain hoist

Abstract

The utility model provides a semi-sealed chain hoist. The semi-sealed chain hoist comprises a chain hoist main body and a chain wheel protection mechanism arranged on the chain hoist main body, the chain hoist main body is provided with two mounting plates which are arranged in parallel, and annular grooves are formed in the opposite side walls of the two mounting plates; the chain wheel protection mechanism comprises a protection plate and a protection plate driving sub-mechanism, and the protection plate driving sub-mechanism is connected with the protection plate and used for driving the protection plate to rotate along the annular groove; the protection plate is of a non-closed annular structure, the diameter of the protection plate is larger than that of a hoisting chain wheel of the hand-drive block body, the two sides of the protection plate in the axis direction of the protection plate are provided with protruding parts, the protruding parts are in sliding fit with the annular grooves, and when the protection plate is located above the hoisting chain wheel, the upper portion of the hoisting chain wheel can be effectively shielded; the effect of blocking rain and snow is achieved. When lubricating oil needs to be injected into the lifting chain wheel, the protection plate can be moved to the edge of the hand-drive block body from the position over the hand-drive block body through the protection plate driving sub-mechanism, and injection of the lubricating oil is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to hoisting equipment technical field especially relates to a semi-sealed manual hoist. BACKGROUND

[0002] Manual hoist is also called god hoist, chain hoist, chain, jin bu fall, manual hoist, is a kind of simple to use, portable hand-operated hoisting machinery, also called "ring chain hoist" or "chain".It is suitable for short distance hoisting of small equipment and goods, the lifting capacity is generally not more than 10T, the maximum can reach 20T, the lifting height is generally not more than 6m.Manual hoist shell material is high-quality alloy steel, firm and wear-resistant, high safety performance.When manual hoist lifts heavy objects upwards, pull the manual chain clockwise, hand sprocket rotates, pull the manual chain counterclockwise when descending, brake seat separates from brake pad, ratchet is stationary under the action of pawl, five-tooth long shaft drives hoisting sprocket to run in the opposite direction, so as to stably lower heavy objects.Manual hoist generally uses ratchet friction plate type one-way brake, which can brake under load, pawl is engaged with ratchet under the action of spring, so that the brake works safely.

[0003] In order to facilitate the installation of hoisting chain and the filling of lubricating oil, the hoisting sprocket of the manual hoist in the prior art is usually exposed to the working environment, and during long-term outdoor use, the hoisting sprocket will be eroded by rain, snow and other sundries, affecting its normal work, so there is an urgent need for a semi-sealed manual hoist. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model embodiment provides a semi-sealed manual hoist to eliminate or improve one or more defects in the prior art.

[0005] The utility model provides a semi-sealed manual hoist, including manual hoist main part and chain wheel protection mechanism being arranged on manual hoist main part, manual hoist main part has two parallel installation plates, and the opposite side wall of two installation plates is provided with annular groove, chain wheel protection mechanism includes protection plate and protection plate drive sub - mechanism, protection plate drive sub - mechanism is connected with protection plate, is used for driving protection plate rotates along annular groove, protection plate is the annular structure of non - closure, the diameter of protection plate is greater than the diameter of hoisting sprocket of manual hoist main part, and the both sides of protection plate along its axial direction have protruding portion, and the protruding portion is slidable with annular groove, in the case where protection plate is located above hoisting sprocket, hoisting sprocket is semi-sealed state to play the protection effect.

[0006] In some embodiments of the utility model, the corresponding central angle of the protection plate is 90° to 240°.

[0007] In some embodiments of the utility model, the protection board drive sub - mechanism includes gear, drive shaft, hand wheel and locking piece, drive shaft runs through hand operated hoist main part with hand operated hoist main part rotatable connection, drive shaft's axis with hoisting sprocket's axis is parallel, gear with drive shaft's middle part fixed connection, and gear is located between two mounting plate, the outside of protection board has the toothed portion, the toothed portion with gear is engaged, hand wheel with drive shaft's one end fixed connection, hand wheel is located hand operated hoist main part's outside, locking piece is connected with drive shaft, for limiting drive shaft relative hand operated hoist main part's rotation.

[0008] In some embodiments of the utility model, the locking piece includes a nut, the other end of the drive shaft has a threaded segment, the threaded segment is arranged beyond the edge of the hand-operated hoist main body, the nut is threadedly connected with the threaded segment, the side of the nut close to the hand-operated hoist main body has a friction surface, and in the case that the nut is screwed on the threaded segment, the friction surface is tightly attached to the side wall of the hand-operated hoist main body.

[0009] In some embodiments of the utility model, the outside of the hand wheel is sleeved with a rubber sleeve.

[0010] In some embodiments of the utility model, the sprocket protection mechanism further comprises a cleaning piece, the cleaning piece is detachably connected with the inner side of the protection plate, and the cleaning piece is used for cleaning the hoisting sprocket and hoisting chain.

[0011] In some embodiments of the utility model, the cleaning piece comprises a hard base layer and any one of a brush layer, a cleaning cloth layer and a sponge layer arranged on the hard base layer.

[0012] In some embodiments of the utility model, the inner side of the protection plate has a mounting groove, both ends of the mounting groove have mounting holes, the hard base layer is matched with the mounting groove, and the mounting holes are used for screwing the cleaning piece into the mounting groove.

[0013] In some embodiments of the utility model, the protection plate corresponds to a central angle of 80°.

[0014] In some embodiments of the utility model, lubricating oil or grease is arranged between the annular groove and the protruding portion.

[0015] In this semi-sealed manual hoist, a sprocket protection mechanism prevents rain and snow from contacting the lifting sprocket in the hoist body, reducing rust caused by rain and snow. The annular grooves on the two mounting plates are of the same size and corresponding position, guiding the movement of the protection plates. The protection plates are located inside the hoist body and slide together via the annular grooves, making the entire semi-sealed manual hoist structure particularly compact. It achieves rain and snow protection without increasing the overall dimensions of the hoist body. The protection plates effectively shield the lifting sprocket from rain and snow without hindering its normal operation. A protection plate drive sub-mechanism is connected to the protection plates and drives them to rotate along the annular grooves. When lubricating oil needs to be added to the lifting sprocket, the protection plate can be moved from directly above the hoist body to the side via the drive sub-mechanism for easy lubrication.

[0016] Additional advantages, objects, and features of this invention will be set forth in part in the description which follows, and will in part become apparent to those skilled in the art upon review of the description, or may be learned by practice of the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures specifically pointed out in the description and drawings.

[0017] Those skilled in the art will understand that the objectives and advantages achievable with this invention are not limited to those specifically described above, and that the above and other objectives achievable with this invention will become clearer from the following detailed description. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, do not constitute a limitation thereof. The components in the drawings are not drawn to scale but are merely for illustrating the principles of the present invention. For ease of illustration and description of certain parts of the present invention, corresponding portions in the drawings may be enlarged, i.e., may appear larger relative to other components in an exemplary device actually manufactured according to the present invention.

[0019] Figure 1 This is a front view of a semi-sealed manual hoist in one embodiment of the present invention.

[0020] Figure 2 This is a right view of a semi-sealed manual hoist in one embodiment of the present invention.

[0021] Figure 3 This is a front view of the mounting plate in one embodiment of the present invention.

[0022] Figure 4 This is a bottom view of the mounting plate in one embodiment of the present invention.

[0023] Figure 5 It is the left view of the mounting plate in an embodiment of the utility model.

[0024] Figure 6 It is the structural schematic view of the hard base layer and the brush layer in an embodiment of the utility model.

[0025] Figure 7 It is the structural schematic view of the annular groove in an embodiment of the utility model.

[0026] Sign significance: 1, hand hoist main body;11, mounting plate;12, annular groove;13, hoisting sprocket;14, hoisting chain;2, sprocket protection mechanism;21, protection plate;211, protruding part;212, toothed part;213, installation groove;22, gear;23, transmission shaft;24, hand wheel;25, nut;26, rubber sleeve;27, hard base layer;28, brush layer. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following will be combined with embodiment and drawing to make further detailed description to the utility model. Herein, the illustrative embodiment of the utility model and its description are used to explain the utility model, but not as the limitation to the utility model.

[0028] Herein, it also needs to be explained that, in order to avoid the utility model being obscured by unnecessary details, only the structure and / or processing step closely related to the scheme according to the utility model is shown in the drawing, and other details not closely related to the utility model are omitted.

[0029] It should be emphasized that the term "comprising / including" is used herein to refer to the presence of a feature, element, step or component, but not to exclude the presence or addition of one or more other features, elements, steps or components.

[0030] Herein, it also needs to be explained that, if not specially stated, the term "connection" can not only mean direct connection, but also mean indirect connection with the presence of intermediate.

[0031] In the following, the embodiment of the utility model will be described with reference to the drawing. In the drawing, the same reference signs represent the same or similar parts, or the same or similar steps.

[0032] In order to solve the problem that the hoisting sprocket of the hand hoist is easy to be eroded by rain and snow in the prior art, the embodiment provides a semi-sealed hand hoist, which can protect the hoisting sprocket, can prevent rain from dripping on the hoisting sprocket, and simultaneously does not affect the filling of lubricating oil.

[0033] Reference Figure 1 And Figure 2The utility model embodiment provides a kind of semi-sealed hand chain block, including hand chain block main body 1 and the sprocket protection mechanism 2 of setting on hand chain block main body 1.It needs to be explained, hand chain block main body 1 is prior art, it includes upper hook, working mechanism, lower hook, hoisting chain and hand chain etc..Upper hook hangs in support object, there is shell below upper hook, and working mechanism is installed inside.Working mechanism includes hoisting sprocket, hand sprocket, ratchet friction plate type single-phase brake, transmission gear and shaft etc..Hoisting chain is connected with lower hook by hoisting sprocket transmission.The power of transmission human force is pulled and introduced by hand chain, which is not described here.Sprocket protection mechanism 2 is used to prevent rain and snow from contacting hoisting sprocket 13 in hand chain block main body 1, to reduce the rust problem caused by rain and snow.

[0034] Referring to Figure 7 Hand chain block main body 1 has two parallel installation plates 11, and annular grooves 12 are arranged on the opposite side walls of the two installation plates 11.The installation plate 11 is generally a circular plate material with a certain thickness and bearing capacity.The annular grooves 12 on the two installation plates 11 are the same in size and position, providing guidance for the movement of the protection plate 21.

[0035] The sprocket protection mechanism 2 in the above embodiment includes a protection plate 21 and a protection plate driving sub-mechanism connected to the protection plate 21 for driving the protection plate 21 to rotate along the annular groove 12.When it is necessary to add lubricating oil to the hoisting sprocket 13, the protection plate 21 can be moved from directly above the hand chain block main body 1 to the edge of the hand chain block main body 1 by the protection plate driving sub-mechanism, facilitating the addition of lubricating oil.The protection plate 21 can effectively shield the upper part without interfering with the normal operation of the hoisting sprocket, playing a role in blocking rain and snow.

[0036] Referring to Figure 3 And Figure 5 The protection plate 21 is a non-closed annular structure, and the diameter of the protection plate 21 is greater than the diameter of the hoisting sprocket 13 of the hand chain block main body 1, which does not interfere with the smooth running of the chain while playing a shielding role.Both sides of the protection plate 21 along its axis direction have protruding parts 211, which are slidably matched with the annular grooves 12.Under the condition that the protection plate 21 is located above the hoisting sprocket 13, the hoisting sprocket 13 is in a semi-sealed state to play a protection role.The protection plate 21 is arranged inside the hand chain block main body 1 and is slidably matched through the annular grooves 12, and the structure of the entire semi-sealed hand chain block is particularly compact, achieving the effect of preventing rain and snow without increasing the size of the hand chain block main body 1.

[0037] In some embodiments, the corresponding central angle of the guard plate 21 is 90° to 240°. The corresponding central angle of the guard plate 21 can be reasonably set according to the actual situation. In the case of a small central angle, the protection effect is limited and does not affect the work of the lifting chain. In the case of a large central angle, the protection effect is significant, and attention should be paid to prevent interference with the lifting chain during use.

[0038] In some embodiments, the guard plate driving sub-mechanism includes a gear 22, a transmission shaft 23, a hand wheel 24, and a locking piece. The transmission shaft 23 penetrates the hand-operated hoist body 1 and is rotatably connected with the hand-operated hoist body 1. The axis of the transmission shaft 23 is parallel to the axis of the lifting chain wheel 13.

[0039] The gear 22 is fixedly connected with the middle part of the transmission shaft 23, and the gear 22 is located between the two mounting plates 11. The outer side of the guard plate 21 has a toothed portion 212, which is engaged with the gear 22. The stability and accuracy of the guard plate 21 during rotation are ensured through gear transmission.

[0040] The hand wheel 24 in the above embodiments is fixedly connected with one end of the transmission shaft 23, and the hand wheel 24 is located on the outer side of the hand-operated hoist body 1. This allows the operator to visually see and easily operate the hand wheel 24 to adjust the position of the guard plate 21.

[0041] The locking piece is connected with the transmission shaft 23 and is used to limit the rotation of the transmission shaft 23 relative to the hand-operated hoist body 1. This ensures that after the guard plate 21 is adjusted to the desired position, it can be securely locked in that position by the locking piece, preventing the guard plate 21 from moving due to accidental factors such as wind, vibration, etc., thereby ensuring safety and stability during operation.

[0042] In some embodiments, the locking piece includes a nut 25. The other end of the transmission shaft 23 has a threaded segment, which is arranged beyond the edge of the hand-operated hoist body 1. The nut 25 is threadedly connected with the threaded segment. The side of the nut 25 close to the hand-operated hoist body 1 has a friction surface. In the case where the nut 25 is tightened on the threaded segment, the friction surface is tightly fitted with the side wall of the hand-operated hoist body 1. The nut 25 can be tightened on the threaded segment by a wrench. The friction surface has a locking effect, preventing the nut 25 from loosening due to vibration during the operation of the hand-operated hoist body 1, thereby increasing safety performance.

[0043] In some embodiments, a rubber sleeve 26 is provided on the outer side of the hand wheel 24. The rubber sleeve 26 can prevent slipping, making it easier for the operator to apply force to the hand wheel 24, and preventing the hand wheel 24 from slipping or loosening during rotation.

[0044] In some embodiments, the sprocket protection mechanism 2 further comprises a cleaning piece which is detachably connected to the inner side of the protection plate 21, and which is used to clean the hoisting sprocket 13 and the hoisting chain 14. After long-term use, the hoisting sprocket 13 and the hoisting chain 14 will have accumulated impurities such as oil sludge and dust at the contact position, and the cleaning piece can clean away such dirt, facilitating the maintenance and care of the manual hoist body 1 and prolonging the service life thereof.

[0045] In some embodiments, the cleaning piece comprises a hard base layer 27 and any one of a brush layer 28, a cleaning cloth layer and a sponge layer arranged on the hard base layer 27. Referring to Figure 6 , the brush layer 28 is suitable for removing stubborn dirt and rust; the cleaning cloth layer is more suitable for wiping and absorbing oil stains; and the sponge layer can gently clean the surface and avoid damaging the equipment. Such arrangement enables the operator to select a suitable cleaning piece according to the actual situation to meet the cleaning requirements in different scenarios.

[0046] In some embodiments, referring to Figure 4 , the inner side of the protection plate 21 has a mounting groove 213, both ends of the mounting groove 213 have mounting holes, the hard base layer 27 is adapted to the mounting groove 213, and the mounting holes are used for the screws to pass through to mount the cleaning piece in the mounting groove 213. The operator only needs to accurately insert the hard base layer 27 into the mounting groove 213, and then fix it using the screws passing through the mounting holes, which is simple and fast. Such arrangement enables the installation of the cleaning piece to be completed without disassembling the protection plate 21, thereby improving the convenience of replacing the cleaning piece.

[0047] In some embodiments, the protection plate 21 corresponds to a central angle of 180°. Such arrangement can achieve a high protection effect, and the protection plate 21 can completely shield the top of the hoisting sprocket, so that rain and snow cannot fall on the hoisting sprocket, and at the same time, it does not occupy too much space inside the manual hoist body 1.

[0048] In some embodiments, lubricating oil or grease is arranged between the annular groove 12 and the protruding portion 211. The lubricating oil or grease can fully lubricate the contact surface between the annular groove 12 and the protruding portion 211, reduce the friction force, reduce the wear between the parts, and prolong the service life.

[0049] The semi-sealed manual hoist in the above embodiments has the following technical effects:

[0050] 1. The protection plate 21 does not hinder the smooth running of the chain, and at the same time, it plays a shielding role on the top of the hoisting sprocket 13, achieving the effect of preventing rain and snow.

[0051] 2. The protective plate drive sub-mechanism is connected to the protective plate 21 and is used to drive the protective plate 21 to rotate along the annular groove 12. When it is necessary to add lubricating oil to the lifting sprocket 13, the protective plate 21 can be moved from directly above the manual hoist body 1 to the side of the manual hoist body 1 through the protective plate drive sub-mechanism to facilitate the addition of lubricating oil.

[0052] 3. Nut 25 can prevent the vibration of the manual hoist body 1 during operation from causing the nut 25 to loosen, thus increasing safety performance.

[0053] 4. The rubber sleeve 26 can play a role in preventing slippage, making it easier for the operator to apply force to the handwheel 24 and preventing loosening or slippage during the rotation of the handwheel 24.

[0054] 5. The cleaning kits can meet the cleaning needs of different scenarios.

[0055] 6. The installation slot 213 allows the cleaning parts to be installed without removing the protective plate 21, improving the convenience of replacing the cleaning parts.

[0056] It should be clarified that this utility model is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this utility model is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this utility model.

[0057] In this invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with or in place of features of other embodiments.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. For those skilled in the art, various modifications and variations can be made to the embodiments of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A semi-sealed manual hoist, characterized in that, It includes a manual hoist body (1) and a sprocket protection mechanism (2) disposed on the manual hoist body (1); The manual hoist body (1) has two parallel mounting plates (11), and annular grooves (12) are provided on the opposite side walls of the two mounting plates (11); The sprocket protection mechanism (2) includes a protection plate (21) and a protection plate drive sub-mechanism. The protection plate drive sub-mechanism is connected to the protection plate (21) and is used to drive the protection plate (21) to rotate along the annular groove (12). The protective plate (21) is a non-closed annular structure. The diameter of the protective plate (21) is larger than the diameter of the lifting sprocket (13) of the manual hoist body (1). The protective plate (21) has protrusions (211) on both sides along its axial direction. The protrusions (211) and the annular groove (12) are slidably engaged. When the protective plate (21) is located above the lifting sprocket (13), the lifting sprocket (13) is in a semi-sealed state to play a protective role.

2. The semi-sealed manual hoist according to claim 1, characterized in that, The central angle corresponding to the protective plate (21) is 90° to 240°.

3. The semi-sealed manual hoist according to claim 1, characterized in that, The protective plate drive sub-mechanism includes a gear (22), a transmission shaft (23), a handwheel (24), and a locking component; The drive shaft (23) passes through the manual hoist body (1) and is rotatably connected to the manual hoist body (1). The axis of the drive shaft (23) is parallel to the axis of the lifting sprocket (13). The gear (22) is fixedly connected to the middle of the transmission shaft (23), and the gear (22) is located between the two mounting plates (11). The outer side of the protective plate (21) has a toothed portion (212), which meshes with the gear (22). The handwheel (24) is fixedly connected to one end of the transmission shaft (23), and the handwheel (24) is located on the outside of the manual hoist body (1); The locking element is connected to the drive shaft (23) and is used to restrict the rotation of the drive shaft (23) relative to the manual hoist body (1).

4. The semi-sealed manual hoist according to claim 3, characterized in that, The locking component includes a nut (25), and the other end of the drive shaft (23) has a threaded section that extends beyond the edge of the manual hoist body (1). The nut (25) is threadedly connected to the threaded section. The nut (25) has a friction surface on the side near the manual hoist body (1). When the nut (25) is tightened on the threaded section, the friction surface fits tightly against the side wall of the manual hoist body (1).

5. The semi-sealed manual hoist according to claim 3, characterized in that, The handwheel (24) is fitted with a rubber sleeve (26) on its outer side.

6. The semi-sealed manual hoist according to claim 1, characterized in that, The sprocket protection mechanism (2) also includes a cleaning component, which is detachably connected to the inner side of the protective plate (21). The cleaning component is used to clean the lifting sprocket (13) and the lifting chain (14).

7. The semi-sealed manual hoist according to claim 6, characterized in that, The cleaning component includes any one of a rigid base layer (27) and a brush layer (28), a cleaning cloth layer, and a sponge layer disposed on the rigid base layer (27).

8. The semi-sealed manual hoist according to claim 7, characterized in that, The inner side of the protective plate (21) has a mounting groove (213), and the two ends of the mounting groove (213) have mounting holes. The rigid base layer (27) is adapted to the mounting groove (213), and the mounting holes are used for screws to pass through and install the cleaning component in the mounting groove (213).

9. The semi-sealed manual hoist according to claim 1, characterized in that, The central angle corresponding to the protective plate (21) is 180°.

10. The semi-sealed manual hoist according to claim 1, characterized in that, Lubricating oil or grease is provided between the annular groove (12) and the protrusion (211).

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