Dustproof gear shaft

Abstract

The utility model provides a dustproof gear shaft which comprises a first shaft body, a second shaft body and a gear, a connecting rod is arranged at the bottom end of the first shaft body, the gear is connected to the connecting rod in a sleeved mode, the lower portion of the connecting rod is inserted into the second shaft body, the top of the gear abuts against the first shaft body and a blocking shoulder of the connecting rod, and the bottom of the gear abuts against the top of the second shaft body. A first fixing table is arranged at the top of the second shaft body, a plurality of first fixing pieces are evenly and fixedly connected between the bottom of the first fixing table and the gear, a second fixing table is arranged on the outer side of the second shaft body and fixedly connected with the connecting rod through second fixing pieces, a protective cover is arranged on the outer side of the second fixing table, and the upper side of the protective cover is in threaded connection with the outer side of the first fixing table; a limiting part abutting against the bottom of the second fixing table is arranged at the bottom. The utility model has the beneficial effect that the problem that dust in the air is accumulated at the first fixing piece, the second fixing piece and the gap between the gear and the connecting rod during long-term work, so that the dust is inconvenient to disassemble and assemble in the later period can be effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of gear shafts, in particular to a dustproof gear shaft. Background Art

[0002] A gear shaft is a mechanical part that supports a rotating part and rotates with it, capable of transmitting motion, torque, or bending moment. Currently, in order to facilitate the replacement of gears on a gear shaft, the shaft is set as a two-section structure that is plugged in and fixed. The gear is fixed between the two shafts by fixing pins, etc., so multiple bolts are required, or a bolt is required to be positioned and fixed in conjunction with multiple limit slots and limit columns. The latter is more difficult to process, and both require the bolts to be exposed to the outside to work. After long-term operation, dust in the air is easily accumulated on the gear shaft, especially at the bolts, which makes it inconvenient to disassemble and repair and replace later. In addition, dust is likely to enter the gap between the gear and the shaft, which is not convenient for later disassembly and maintenance. Utility Model Content

[0003] In view of this, the present invention aims to overcome the above-mentioned deficiencies in the prior art and proposes a dustproof gear shaft.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] The gear shaft is connected to the gear of the gear box by the second end of the gear box, and the gear box is connected to the gear box by the second end of the gear box.

[0006] Furthermore, the first fixing member is a bolt, and a plurality of through holes are evenly opened at the bottom of the first fixing platform. A threaded hole is opened at the bottom of the gear corresponding to each through hole. The first fixing platform is fixed to the bottom of the gear through the bolts, the through holes and the threaded holes.

[0007] Furthermore, a groove is downwardly opened on the top of the second shaft body, and the lower part of the connecting rod is inserted into the groove.

[0008] Furthermore, a plurality of through holes are evenly opened at the lower part of the connecting rod, and a mounting hole that passes through the second fixing platform and the second axis body is opened on the side wall of the second fixing platform. The second fixing part is a bolt and nut pair, and the connecting rod is fixedly connected to the groove of the second axis body through the cooperation of the bolt and nut pair with the mounting hole and the through hole.

[0009] Furthermore, a limit platform is provided on the first shaft body near the shoulder where the first shaft body and the connecting rod are connected, and the bottom of the limit platform is tightly pressed against the upper surface of the gear, and the first shaft body, the connecting rod and the limit platform are an integrally formed structure.

[0010] Furthermore, the first fixing platform is tightly pressed against the bottom of the gear, and the first fixing platform, the second fixing platform and the second shaft are an integrally formed structure.

[0011] Furthermore, the limiting portion and the protective cover are an integrally formed structure.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] The dust-proof gear shaft described in the utility model clamps and positions the gear through the first fixed platform on the top of the second shaft body and the shoulder on the first shaft body, and fixes the gear to the upper side of the first fixed platform through the first fixing piece, fixes the connecting rod and the second fixed platform together through the second fixing piece, and shields the second fixing platform and the first fixing piece and the second fixing piece through the protective cover, which can effectively avoid the problem of dust in the air accumulating at the first fixing piece, the second fixing piece and the gap between the gear and the connecting rod during long-term work, causing inconvenience in disassembly and assembly in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the dustproof gear shaft structure according to an embodiment of the present utility model;

[0016] Figure 2 This is a schematic structural diagram of the dustproof gear shaft according to an embodiment of the present invention after removing the protective cover;

[0017] Figure 3 This is a cross-sectional view of the dust-proof gear shaft described in an embodiment of the present utility model.

[0018] Description of reference numerals:

[0019] 1. First shaft; 11. Connecting rod; 12. Limiting platform; 13. Through hole; 2. Second shaft; 21. First fixing platform; 22. Second fixing platform; 23. Mounting hole; 231. Countersunk hole; 24. Groove; 3. Gear; 4. Protective cover; 41. Limiting part; 5. First fixing member; 6. Second fixing member. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0024] As shown in the figure, a dust-proof gear shaft includes a first shaft body 1, a second shaft body 2 and a gear 3. A connecting rod 11 is coaxially provided downwardly at the bottom end of the first shaft body 1. The gear 3 is sleeved on the connecting rod 11, and the lower part of the connecting rod 11 is inserted into the second shaft body 2. The top of the gear 3 is pressed against the shoulder at the connection between the first shaft body 1 and the connecting rod 11, and the bottom is pressed against the top of the second shaft body 2. A first fixed platform 21 is circumferentially provided on the top of the second shaft body 2. A plurality of first fixing parts 5 are evenly fixed between the bottom of the first fixed platform 21 and the gear 3. A second fixed platform 22 is circumferentially provided at the outer side of the second shaft body 2 corresponding to the connecting rod 11. The second fixed platform 22 is fixed to the connecting rod 11 through a second fixing part 6, and a protective cover 4 is provided on the outer side of the second fixed platform 22. The upper side of the protective cover 4 is screwed to the outer side of the first fixed platform 21, and the bottom of the protective cover 4 is provided inwardly with an annular limiting portion 41 pressed against the bottom of the second fixed platform 22. In this embodiment, the gear 3 is clamped and positioned by the first fixed platform 21 on the top of the second shaft body 2 and the shoulder on the first shaft body 1, and the gear 3 is fixed to the upper side of the first fixed platform 21 by the first fixing piece, the connecting rod 11 and the second fixed platform 22 are fixed together by the second fixing piece 6, and the second fixed platform 22 and the first fixed platform 21 as well as the first fixing piece and the second fixing piece 6 are shielded by the protective cover 4, which can effectively prevent dust in the air from accumulating at the first fixing piece, the second fixing piece 6 and the gap between the gear 3 and the connecting rod 11 during long-term work, making it inconvenient to disassemble and assemble later.

[0025] The first fixing member 5 is a bolt. A plurality of through holes are evenly opened at the bottom of the first fixing platform 21. A threaded hole is opened at the bottom of the gear 3 corresponding to each through hole. The first fixing platform 21 is fixed to the bottom of the gear 3 by the bolts, through holes and threaded holes.

[0026] A groove 24 is defined downwardly on the top of the second shaft body 2 , and the lower portion of the connecting rod 11 is inserted into the groove 24 .

[0027] The connecting rod 11 is provided with multiple through-holes 13 evenly spaced on its lower portion. A mounting hole 23 is provided on the sidewall of the second fixing platform 22, extending through the second fixing platform 22 and the second shaft body 2. The second fixing member 6 is a bolt and nut pair. The connecting rod 11 is secured to the groove 24 of the second shaft body 2 by the bolt and nut pair, the mounting holes 23, and the through-hole 13. In this embodiment, the mounting holes 23 are configured as counterbores 231 on the surface of the second fixing platform 22, providing mounting surfaces for the bolt caps and nuts. In this embodiment, multiple through-holes 13 are provided to accommodate gears 3 of various axial lengths. The specific location of the through-holes 13 is selected based on the axial length of the gear 3.

[0028] A stop ledge 12 is provided circumferentially outwardly on the first shaft 1, near the shoulder where the first shaft 1 and the connecting rod 11 meet. The bottom of the stop ledge 12 abuts against the upper surface of the gear 3. The first shaft 1, the connecting rod 11, and the stop ledge 12 are integrally formed, effectively enhancing structural strength. In this embodiment, the stop ledge 12 cooperates with the first fixing platform 21 to increase the contact surface of the clamping gear 3, ensuring a more secure fixation of the gear 3. It also increases the coverage of the gap between the gear 3 and the connecting rod 11 by the stop ledge, preventing airborne dust from accumulating in the gap between the gear 3 and the connecting rod 11.

[0029] The first fixing platform 21 is pressed against the bottom of the gear 3 , and the first fixing platform 21 , the second fixing platform 22 and the second shaft 2 are an integrally formed structure, which effectively enhances the structural strength.

[0030] The limiting portion 41 and the protective cover 4 are an integrally formed structure.

[0031] The working process of this embodiment is as follows:

[0032] Sleeve the gear 3 onto the connecting rod 11 and insert the connecting rod 11 into the groove 24. Then, fix the gear 3 and the second fixing platform 22 of the second shaft body 2 together with bolts. Then connect the bolt and nut pair between the second fixing platform 22 and the connecting rod 11 to fix the connecting rod 11. Finally, insert the protective cover 4 from the bottom of the second shaft body 2 upward, rotate the protective cover 4 to move it upward and screw it together with the first fixing platform 21 until the limit part 41 at the bottom of the protective cover 4 is tightly against the second fixing platform 22.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dustproof gear shaft, characterized by: The gear is mounted on the second end of the gear train and is located adjacent to the gearbox, and the gear train is connected via a second securing member which is secured to the first and second gear trains and is secured to the second end of the gear train.

2. The dustproof gear shaft according to claim 1, characterized in that: The first fixing member is a bolt. A plurality of through holes are evenly opened at the bottom of the first fixing platform. A threaded hole is opened at the bottom of the gear corresponding to each through hole. The first fixing platform is fixed to the bottom of the gear through the bolts, the through holes and the threaded holes.

3. The dustproof gear shaft according to claim 1, characterized in that: A groove is downwardly opened on the top of the second shaft body, and the lower part of the connecting rod is inserted into the groove.

4. The dustproof gear shaft according to claim 3, characterized in that: A plurality of through holes are evenly arranged at the lower part of the connecting rod, and a mounting hole is arranged on the side wall of the second fixing platform, which passes through the second fixing platform and the second shaft body. The second fixing part is a bolt and nut pair, and the connecting rod is fixedly connected to the groove of the second shaft body through the cooperation of the bolt and nut pair with the mounting hole and the through hole.

5. The dustproof gear shaft according to claim 1, characterized in that: A limit platform is provided on the first shaft body near the shoulder where the first shaft body and the connecting rod are connected. The bottom of the limit platform is tightly pressed against the upper surface of the gear, and the first shaft body, the connecting rod and the limit platform are an integrally formed structure.

6. The dustproof gear shaft according to claim 1, characterized in that: The first fixing platform is tightly pressed against the bottom of the gear, and the first fixing platform, the second fixing platform and the second shaft are an integrally formed structure.

7. The dustproof gear shaft according to claim 1, characterized in that: The limiting part and the protective cover are an integrally formed structure.

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