Middle portal chain wheel shaft

Abstract

The utility model provides a chain wheel shaft of a middle door frame, which belongs to the technical field of chain wheel shafts and comprises a cylinder body, a protective cover, a sealing ring, a mounting ring and a rubber gear sleeve. According to the utility model, the cylinder body is movably sleeved on the outer surface of the shaft body, so that the protective cover can shield the chain wheel and the connecting part of the chain wheel and the shaft body, the cylinder body is connected with the mounting ring through the hexagonal screw, so that the protective cover can be fixed, and the sealing ring is arranged between the cylinder body and the mounting ring, so that dust can be further prevented from entering; and the rubber gear sleeve in the cylinder body is meshed with the tooth grooves in the shaft body, so that impurities can be prevented from entering the joint of the shaft body and the chain wheel, the service life of the shaft body and the chain wheel is prolonged, and abrasion or corrosion caused by invasion of external impurities is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to chain wheel shaft technical field especially relates to a middle portal chain wheel shaft. BACKGROUND

[0002] In the portal system of the forklift and other logistics handling equipment, the middle portal chain wheel shaft plays a vital role, which is mainly used for supporting the chain wheel and transmitting power to realize the lifting and other operations of the goods.

[0003] The utility model discloses a chain wheel shaft discloses a chain wheel shaft, the outer surface of chain wheel shaft is provided with chain wheel, the inner wall of chain wheel is fixedly connected with two butt joints, the outer surface of chain wheel shaft is opened with two first butt grooves, the outer surface of chain wheel shaft is opened with two second butt grooves, two first butt grooves are communicated with two second butt grooves inside respectively, the staff will chain wheel slidingly cover in the outer surface of chain wheel shaft, the subsequent two clamps will be covered in the outer surface of butt joint, finally realize the installation of chain wheel, when the staff needs to disassemble, reverse first threaded rod, rely on the elastic force of torsion spring itself to make two clamps no longer clamp butt joint, finally realize the disassembly replacement of chain wheel, solve the problem that bolt needs to be disassembled one by one, the workload is relatively large, and the position of chain wheel cannot be adjusted according to actual needs, the device simplifies the step of disassembling chain wheel.

[0004] But the protection structure in the above structure only focuses on preventing the knock of external objects to the chain wheel, and does not consider the impurities entering the gap between the chain wheel and the shaft, which leads to the easy wear and corrosion of the shaft body, and further affects the service life and running stability of the equipment. SUMMARY

[0005] The utility model discloses a middle portal chain wheel shaft lacks the protection of the prior art.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of a middle portal chain wheel shaft, which comprises: a shaft body, a chain wheel sleeved on the outer surface of the shaft body, an installation piece arranged at one end of the shaft body, an installation hole in the middle portal connected to one side of the installation piece, and a protection assembly arranged on the outer surface of the shaft body for protecting the connection between the shaft body and the chain wheel.

[0007] The protection assembly comprises a cylinder movably sleeved on the outer surface of the shaft body, and a protective cover arranged on one side of the cylinder, a mounting ring fixedly sleeved on the outer surface of the shaft body, a sealing ring arranged on one side of the mounting ring and the protective cover, a hexagonal screw threadedly connected between the mounting ring and the cylinder, a tooth groove formed on the outer surface of the shaft body, and a rubber tooth sleeve arranged in the interior of the cylinder, the rubber tooth sleeve being engaged with the interior of the tooth groove.

[0008] Further, the inner surface of the rubber tooth cover is provided with a wear-resistant layer, which is a component made of polytetrafluoroethylene.

[0009] Further, the upper surface of the protective cover is provided with an oil injection head, one end of the oil injection head is provided with an oil injection cover, the other end of the oil injection head is provided with a connecting pipe, one end of the connecting pipe is provided with an annular pipe, the outer surface of the annular pipe is provided with a branch pipe, the oil outlet hole of the annular pipe corresponds to the outer surface of the shaft body, and the oil outlet hole of the branch pipe corresponds to the inner wall of the protective cover.

[0010] Further, the inner wall of the protective cover is provided with bristles, which are in contact with the outer surface of the sprocket.

[0011] Further, the shaft body is a component made of alloy steel, and the outer surface of the shaft body is subjected to quenching and tempering treatment.

[0012] Further, the mounting member is a stepped shaft structure.

[0013] Further, a connecting assembly is arranged between the shaft body and the sprocket, the connecting assembly comprises a sliding groove A and a sliding groove B arranged on the surface of the shaft body, and a connecting cylinder arranged at the center of the sprocket, the connecting cylinder is internally provided with a positioning block, the sliding groove A and the sliding groove B are in communication, the positioning block is movably connected with the interiors of the sliding groove A and the sliding groove B, the inner wall of the sliding groove B is provided with a damping spring, one end of the damping spring is provided with a limiting block, one end of the limiting block penetrates the outer portion of the connecting cylinder, and the limiting block is threadedly connected with the sprocket through bolts.

[0014] Compared with the prior art, the beneficial effects of the utility model include that the cylinder body, the protective cover, the sealing ring, the mounting ring and the rubber tooth cover are arranged, the cylinder body is movably sleeved on the outer surface of the shaft body, so that the protective cover can shield the sprocket and the connecting portion of the sprocket and the shaft body, the cylinder body is connected with the mounting ring through hexagonal screws, so that the protective cover can be fixed, and since the sealing ring is arranged between the cylinder body and the mounting ring, dust can be further prevented from entering, since the rubber tooth cover in the cylinder body is engaged with the tooth groove on the shaft body, impurities can be prevented from entering the connecting portion of the shaft body and the sprocket, the service life of the shaft body and the sprocket is improved, and wear or corrosion caused by impurities invading from outside is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0015] The disclosure of the utility model will be explained with reference to the drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the protection scope of the utility model. In the drawings, the same reference signs are used to refer to the same parts. Among them:

[0016] Figure 1 The overall structure schematic diagram of the middle door frame sprocket shaft is schematically shown according to one embodiment of the utility model;

[0017] Figure 2The schematic diagram shows a shaft body structure schematic diagram of a middle portal chain wheel shaft according to an embodiment of the present application.

[0018] Figure 3 The schematic diagram shows a part protection assembly schematic diagram of the middle portal chain wheel shaft according to an embodiment of the present application.

[0019] Figure 4 The schematic diagram shows a protection assembly and chain wheel split schematic diagram of the middle portal chain wheel shaft according to an embodiment of the present application.

[0020] In the figure, the reference signs are as follows: 1, shaft body; 2, chain wheel; 21, connecting cylinder; 3, mounting piece; 4, protection assembly; 41, cylinder body; 42, protective cover; 421, bristles; 43, mounting ring; 44, sealing ring; 45, tooth groove; 46, rubber tooth sleeve; 5, oil injection head; 51, oil injection cover; 52, connecting pipe; 53, annular pipe; 54, branch pipe; 6, connecting assembly; 61, sliding groove A; 62, sliding groove B; 63, positioning block; 64, damping spring; 65, limiting block. DETAILED DESCRIPTION

[0021] It is easy to understand that according to the technical scheme of the present application, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the present application. Therefore, the following specific embodiments and the accompanying drawings are only exemplary descriptions of the technical scheme of the present application, and should not be regarded as the whole or regarded as the limitation or restriction of the technical scheme of the present application.

[0022] According to an embodiment of the present application combined Figure 1 is shown.

[0023] A middle portal chain wheel shaft comprises a shaft body 1 and a chain wheel 2 sleeved on the outer surface of the shaft body 1, one end of the shaft body 1 is provided with a mounting piece 3, one side of the mounting piece 3 is connected with a mounting hole in the middle portal, and the outer surface of the shaft body 1 is provided with a protection assembly 4 for protecting the connection part of the shaft body 1 and the chain wheel 2.

[0024] In the embodiment, please refer to Figures 1-4The protection assembly 4 comprises a cylinder 41 movably sleeved on the outer surface of the shaft body 1 and a protective cover 42 arranged on one side of the cylinder 41, the outer surface of the shaft body 1 is movably sleeved with a mounting ring 43, the mounting ring 43 and one side of the protective cover 42 are both provided with a sealing ring 44, the mounting ring 43 is threadedly connected with the cylinder 41 through hexagonal screws, the outer surface of the shaft body 1 is provided with a tooth groove 45, the inside of the cylinder 41 is provided with a rubber tooth sleeve 46, the rubber tooth sleeve 46 is engaged with the inside of the tooth groove 45, the cylinder 41 is movably sleeved on the outer surface of the shaft body 1, so that the protective cover 42 can shield the chain wheel 2 and the connecting part between the chain wheel 2 and the shaft body 1, and since the cylinder 41 is connected with the mounting ring 43 through hexagonal screws, the protective cover 42 can be fixed, and since the sealing ring 44 is arranged between the two, the entry of dust can be further prevented, and since the rubber tooth sleeve 46 in the cylinder 41 is engaged with the tooth groove 45 on the shaft body 1, the entry of impurities into the connecting part between the shaft body 1 and the chain wheel 2 can be prevented, the service life of the shaft body 1 and the chain wheel 2 is improved, and wear or corrosion caused by the entry of external impurities is prevented.

[0025] The inner surface of the rubber tooth sleeve 46 is provided with a wear-resistant layer made of polytetrafluoroethylene, which reduces the friction and wear between the rubber tooth sleeve 46 and the tooth groove 45 by utilizing the good wear resistance of polytetrafluoroethylene.

[0026] The upper surface of the protective cover 42 is provided with an oil injection head 5, one end of the oil injection head 5 is provided with an oil injection cover 51, the other end of the oil injection head 5 is provided with a connecting pipe 52, one end of the connecting pipe 52 is provided with an annular pipe 53, the outer surface of the annular pipe 53 is provided with a branch pipe 54, the oil outlet hole of the annular pipe 53 corresponds to the outer surface of the shaft body 1, the oil outlet hole of the branch pipe 54 corresponds to the inner wall of the protective cover 42, external lubricating oil is injected through the oil injection head 5, then the lubricating oil flows to the annular pipe 53 through the connecting pipe 52, and then flows to the outer surface of the shaft body 1 through the oil outlet hole of the annular pipe 53 for lubrication, and then the lubricating oil is transported to the inner wall of the protective cover 42 through the branch pipe 54, so as to lubricate the chain wheel 2.

[0027] The inner wall of the protective cover 42 is provided with bristles 421, which are in contact with the outer surface of the chain wheel 2, so that the lubricating oil can be evenly applied to the outer surface of the chain wheel 2 along the bristles 421, and the outer surface of the chain wheel 2 will not be damaged.

[0028] The shaft body 1 is a component made of alloy steel, the outer surface of the shaft body 1 is subjected to quenching and tempering treatment, the shaft body 1 is made of alloy steel and subjected to quenching and tempering treatment, the alloy steel has good comprehensive properties such as high strength and high toughness, and the quenching and tempering treatment can further improve the hardness, strength and wear resistance of the shaft body.

[0029] The mounting piece 3 is a stepped shaft structure, the mounting piece 3 adopts the stepped shaft structure, can be better matched with the mounting hole in the middle door frame, realizes accurate installation and positioning, and the stepped shaft structure is also beneficial to bearing forces in different directions.

[0030] The connecting assembly 6 is arranged between the shaft body 1 and the chain wheel 2, the connecting assembly 6 comprises a sliding groove A61 and a sliding groove B62 arranged on the surface of the shaft body 1 and a connecting barrel 21 arranged at the center of the chain wheel 2, the connecting barrel 21 is internally provided with a positioning block 63, the sliding groove A61 and the sliding groove B62 are communicated, the positioning block 63 is movably connected with the sliding groove A61 and the sliding groove B62, the inner wall of the sliding groove B62 is provided with a damping spring 64, one end of the damping spring 64 is provided with a limiting block 65, one end of the limiting block 65 penetrates the outside of the connecting barrel 21, the limiting block 65 is threadedly connected with the chain wheel 2, the positioning block 63 is aligned with the sliding groove A61, then, in the moving process of the chain wheel 2, the damping spring 64 is always compressed, until the connecting barrel 21 moves to the position of the limiting block 65, so that the damping spring 64 resets, drives the limiting block 65 to penetrate out of the connecting barrel 21, and then the side of the limiting block 65 is threadedly connected with the chain wheel 2, so that the position of the chain wheel 2 is fixed, therefore, the chain wheel 2 and the shaft body 1 are convenient to disassemble, assemble and maintain.

[0031] Specifically, the cylinder 41 is movably sleeved on the outer surface of the shaft body 1, so that the protective cover 42 connected with the shaft body 1 can shield the chain wheel 2 and the connecting part of the chain wheel 2 and the shaft body 1, and one side of the protective cover 42 is clamped with a transparent cover, and the transparent cover is provided with a plurality of heat dissipation holes on one side, and the protective cover 42 can be fixed by the hexagonal screw and the mounting ring 43, and the sealing ring 44 is arranged between the protective cover 42 and the mounting ring 43, so that the protective cover 42 can be further prevented from entering dust, and the rubber tooth sleeve 46 in the cylinder 41 is engaged with the tooth groove 45 on the shaft body 1, so that the connecting part of the shaft body 1 and the chain wheel 2 can be prevented from entering impurities, the service life of the shaft body 1 and the chain wheel 2 is improved, and wear or corrosion caused by impurities from the outside is prevented, and the rubber tooth sleeve 46 is made of polytetrafluoroethylene, so that the good wear resistance of the polytetrafluoroethylene is utilized to reduce the friction and wear between the rubber tooth sleeve 46 and the tooth groove 45. In addition, the outside lubricating oil is injected through the oil injection head 5, and then the lubricating oil flows to the annular pipe 53 through the connecting pipe 52, and then flows to the outer surface of the shaft body 1 through the oil outlet holes on the annular pipe 53 for lubrication, and then the lubricating oil is transported to the inner wall of the protective cover 42 through the branch pipe 54, so that the chain wheel 1 is lubricated, and the inner wall of the protective cover 42 is provided with the brush 421, so that the lubricating oil can be evenly coated on the outer surface of the chain wheel 2 along the brush 421, and the outer surface of the chain wheel 2 is not damaged. Then, the positioning block 63 is aligned with the sliding groove A61, and then the damping spring 64 is always compressed during the movement of the chain wheel 2, until the connecting cylinder 21 moves to the limiting block 65, so that the damping spring 64 is reset, the limiting block 65 passes through the connecting cylinder 21, and then one side of the limiting block 65 is threadedly connected with the chain wheel 2, so that the position of the chain wheel 2 is fixed, and the chain wheel 2 and the shaft body 1 are convenient to disassemble and maintain, and the mounting part 3 is used, and the mounting part 3 adopts a stepped shaft structure, so that the mounting part 3 can better cooperate with the mounting holes in the middle door frame, accurate installation and positioning are realized, and the stepped shaft structure is also beneficial to bearing forces in different directions. Finally, the shaft body 1 is made of alloy steel and is subjected to quenching and tempering treatment, the alloy steel has good comprehensive properties such as high strength and high toughness, and the quenching and tempering treatment can further improve the hardness, strength and wear resistance of the shaft body.

[0032] The technical scope of the utility model is not limited to the contents in the above description, and those skilled in the art can make various modifications and changes to the above embodiment without departing from the technical thought of the utility model, and these modifications and changes should all belong to the protection scope of the utility model.

Claims

1. A center gate sprocket shaft characterized by: The application relates to a sprocket wheel assembly, which comprises a shaft body and a sprocket wheel sleeved on the outer surface of the shaft body, one end of the shaft body is provided with a mounting piece, one side of the mounting piece is connected with a mounting hole in a middle door frame, the outer surface of the shaft body is provided with a protection assembly for protecting the connection between the shaft body and the sprocket wheel. The protection assembly comprises a cylinder body movably sleeved on the outer surface of the shaft body and a protective cover arranged on one side of the cylinder body, the outer surface of the shaft body is solidly sleeved with a mounting ring, one side of the mounting ring and the protective cover is provided with a sealing ring, the mounting ring and the cylinder body are connected through a hexagonal screw thread, the outer surface of the shaft body is provided with a tooth groove, the inside of the cylinder body is provided with a rubber tooth sleeve, and the rubber tooth sleeve is engaged with the inside of the tooth groove.

2. The center gate sprocket shaft of claim 1, wherein: The inner surface of the rubber tooth sleeve is provided with a wear-resistant layer which is a component made of polytetrafluoroethylene.

3. The center gate sprocket shaft of claim 1, wherein: The upper surface of the protective cover is provided with an oil injection head, one end of the oil injection head is provided with an oil injection cover, the other end of the oil injection head is provided with a connecting pipe, one end of the connecting pipe is provided with an annular pipe, the outer surface of the annular pipe is provided with a branch pipe, the oil outlet hole of the annular pipe corresponds to the outer surface of the shaft body, and the oil outlet hole of the branch pipe corresponds to the inner wall of the protective cover.

4. The center gate sprocket shaft of claim 1, wherein: The inner wall of the protective cover is provided with bristles which are in contact with the outer surface of the sprocket wheel.

5. The center gate sprocket shaft of claim 1, wherein: The shaft body is a component made of alloy steel, and the outer surface of the shaft body is subjected to quenching and tempering treatment.

6. The center gate sprocket shaft of claim 1, wherein: The mounting piece is a stepped shaft structure.

7. The center gate sprocket shaft of claim 1, wherein: The shaft body and the sprocket wheel are provided with a connecting assembly, the connecting assembly comprises a sliding groove A and a sliding groove B arranged on the surface of the shaft body and a connecting cylinder arranged at the center of the sprocket wheel, the inside of the connecting cylinder is provided with a positioning block, the sliding groove A and the sliding groove B are connected, the positioning block is movably connected with the inside of the sliding groove A and the sliding groove B, the inner wall of the sliding groove B is provided with a damping spring, one end of the damping spring is provided with a limiting block, one end of the limiting block penetrates the outside of the connecting cylinder, and the limiting block and the sprocket wheel are connected through a bolt thread.

Images