Split type tooth shaft with improved structure

Abstract

The utility model provides a split type gear shaft of improved structure belongs to mechanical technical field, it has solved the problem of inconvenient maintenance of existing gear shaft. The split type gear shaft of improved structure includes the shaft body and two ring gears of respectively sleeveing in the both ends of shaft body, two ring gears all are connected with the shaft body through the flat key or the spline, the middle part of shaft body is equipped with and has the locating sleeve, the both ends of locating sleeve respectively extend into two ring gears, the both ends of locating sleeve outside surface all have a section taper surface one, two taper surfaces one along the center symmetry of locating sleeve are arranged, and the diameter of taper surface is gradually increased from the corresponding locating sleeve end to the middle part direction of locating sleeve, two ring gears inner wall all have taper surface two, two taper surfaces two are respectively pasted on two taper surfaces one, the both ends of shaft body still are equipped with and can detachably fixed annular limiting piece, two limiting pieces are respectively pressed on the end face of two ring gears opposite to each other. The split type gear shaft of improved structure is convenient to maintain.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a gear shaft, particularly a split gear shaft with an improved structure. Background Technology

[0002] A split gear shaft is a mechanical transmission component that manufactures gears and shafts separately and then reassembles them. This design improves manufacturing and maintenance efficiency while ensuring functionality by optimizing the structure and connection method.

[0003] Existing split gear shaft structures, such as the keyless connection structure of two gears on both sides of a split herringbone gear shaft disclosed in the Chinese Patent Database (application number: 201922240876.4), include a shaft, on which a connecting bushing is installed. Helical gear I and helical gear II, which are interference-fitted with the shaft, are symmetrically arranged at both ends of the connecting bushing. The connecting bushing has radially arranged bushing keyways symmetrically machined at both ends. Helical gear I and helical gear II each have pin holes machined on the axial sidewall near the bushing keyway. One end of a cylindrical pin is placed in the pin hole and passes through the pin hole into the bushing keyway. Helical gear I and helical gear II are combined to form a herringbone gear.

[0004] In the above connection structure, helical gear I and helical gear II are connected to the shaft by an interference fit. Although this method ensures the coaxiality of helical gear I and helical gear II, it requires the use of tools such as pullers when replacing helical gear I and helical gear II, which is inconvenient. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an improved split gear shaft with a structure that facilitates gear replacement.

[0006] The objective of this utility model can be achieved through the following technical solution: a modified split gear shaft, comprising a shaft body and two annular gears respectively sleeved at both ends of the shaft body, wherein both annular gears are connected to the shaft body via a flat key or spline, characterized in that a positioning sleeve is sleeved and fixed in the middle of the shaft body, and the positioning sleeve and the shaft body are coaxially arranged; the two ends of the positioning sleeve extend into the two annular gears respectively, and each end of the positioning sleeve has a section of conical surface I on its outer surface, the two conical surfaces I are symmetrically arranged along the center of the positioning sleeve, and the diameter of the conical surface I gradually increases from the end of the corresponding positioning sleeve towards the middle of the positioning sleeve; the inner walls of the two annular gears each have conical surface II, and the two conical surfaces II are respectively attached to the two conical surfaces I; both ends of the shaft body are also sleeved and detachably fixed with annular limiting members, and the two limiting members are respectively pressed against the opposite end faces of the two annular gears.

[0007] When in use, remove the limiting piece and manually push the two ring gears away from each other to disengage the ring gears from the shaft, thus effectively facilitating the disassembly and assembly of the ring gears for subsequent maintenance.

[0008] A positioning sleeve is coaxially mounted on the shaft, and the positioning sleeve and the two ring gears are fitted with a tapered surface to forcibly correct the position of the ring gears, thereby significantly enhancing the coaxiality of the ring gears and the shaft and improving the transmission accuracy of this split gear shaft.

[0009] In the aforementioned modified split gear shaft, an interference fit is formed between the inner wall of the positioning sleeve and the outer wall of the shaft body. This connection method not only facilitates assembly but also ensures the coaxiality of the positioning sleeve and the shaft body.

[0010] In the aforementioned improved split gear shaft, a rolling bearing is fitted onto the locating sleeve. The rolling bearing includes an inner ring, which is fixedly connected to the locating sleeve. The rolling bearing is used for mounting this split gear shaft.

[0011] In the aforementioned improved split-type gear shaft, pressure rings are formed on the adjacent end faces of the two ring gears, and the pressure rings are coaxial with the ring gears. The two pressure rings are respectively pressed against the two end faces of the inner ring. The ring gears are used for both power transmission and axial positioning of rolling bearings, achieving a dual-purpose effect, simplifying the structure and facilitating assembly.

[0012] In the modified split gear shaft described above, the pressure ring and the positioning sleeve are fitted together to form an annular gap, and the annular gap is coaxial with the shaft body. This design reduces friction during the installation of the ring gear, further facilitating assembly and disassembly.

[0013] In the aforementioned improved split-type gear shaft, an interference fit is formed between the inner ring and the locating sleeve. An annular retaining ring is formed on the outer wall of the locating sleeve, and the retaining ring and the locating sleeve are coaxially arranged. The retaining ring is located in one of the annular gaps and presses against the inner ring. The retaining ring is used to press the bearing into the locating sleeve for positioning, allowing the bearing to be installed in place in one go, further facilitating assembly.

[0014] In the aforementioned improved split-type gear shaft, the limiting component includes a nut threadedly connected to the shaft body, an annular washer positioned between the nut and the corresponding ring gear, the annular washer being fitted onto the shaft body and clamped between the corresponding nut and the corresponding ring gear. This design facilitates the assembly and disassembly of the ring gear.

[0015] As another option, in the split gear shaft with the above-mentioned improved structure, the limiting component is a limiting sleeve. A threaded hole 1 is radially penetrating the side wall of the limiting sleeve, and a threaded hole 2 is provided on the shaft body. The number of threaded holes 1 and threaded holes 2 are the same and their positions correspond one-to-one. The same bolt is screwed into the threaded holes 1 and threaded holes 2 that correspond to each other in position.

[0016] Compared with existing technologies, the split gear shaft of this improved structure has the following advantages: 1. When using, remove the limiting piece and manually push the two ring gears away from each other to disengage the ring gears from the shaft, thus effectively facilitating the disassembly and assembly of the ring gears for subsequent maintenance.

[0017] 2. A positioning sleeve is coaxially installed on the shaft, and the positioning sleeve and the two ring gears are engaged by a tapered surface. This is used to forcibly correct the position of the ring gears, so as to significantly enhance the coaxiality of the ring gears and the shaft, thereby improving the transmission accuracy of this split gear shaft. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of the split gear shaft of this improved structure.

[0019] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0020] Figure 3 It is a three-dimensional schematic diagram of the connection between the ring gear and the shaft.

[0021] In the figure, 1 is the shaft; 2 is the ring gear; 2a is the second conical surface; 2b is the pressure ring; 3 is the key block; 4 is the positioning sleeve; 4a is the first conical surface; 4b is the retaining ring; 5 is the limiting component; 6 is the annular washer; 7 is the rolling bearing; 7a is the inner ring; and 8 is the annular clearance. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] Example 1: As Figure 1 As shown, the split gear shaft of this improved structure includes a shaft body 1 and a ring gear 2. The shape and size of the inner hole of the ring gear 2 are matched with those of the shaft body 1.

[0024] in, Both ends of the shaft 1 are fitted with ring gears 2, and both ring gears 2 are connected to the shaft 1 via flat keys or splines to form a stable circumferential fit between the ring gears 2 and the shaft 1. In the actual product, the ring gears 2 are connected to the shaft 1 via flat keys. Specifically, key blocks 3 are fixed on the outer walls of both ends of the shaft 1, and the length of the key blocks 3 extends along the axial direction of the shaft 1. The inner walls of the ring gears 2 have keyways that match the key blocks 3, and the two key blocks 3 are respectively inserted into the two keyways.

[0025] like Figure 1 and Figure 2As shown, a positioning sleeve 4 is fitted and fixed in the middle of the shaft 1, and the positioning sleeve 4 and the shaft 1 are coaxially arranged. Two ring gears 2 are respectively inserted into both ends of the positioning sleeve 4. Each end of the positioning sleeve 4 has a conical surface 4a. The two conical surfaces 4a are symmetrically arranged along the center of the positioning sleeve 4, and the diameter of the conical surfaces 4a gradually increases from the corresponding end of the positioning sleeve 4 towards the middle of the positioning sleeve 4. Preferably, the two opposite ends of the two conical surfaces 4a extend to the two end faces of the positioning sleeve 4. The inner walls of the two ring gears 2 each have a conical surface 2a. The two conical surfaces 4a match the two conical surfaces 2a respectively, and the two conical surfaces 2a are respectively pressed against the two conical surfaces 4a. Both ends of the shaft 1 are also fitted and detachably fixed with annular limiting members 5, and the two limiting members 5 are respectively pressed against the opposite end faces of the two ring gears 2 to stably lock the ring gears 2 onto the shaft 1.

[0026] When in use, remove the limiting piece 5 and manually push the two ring gears 2 away from each other to disengage the ring gears 2 from the shaft 1, thereby effectively facilitating the disassembly and assembly of the ring gears 2 for subsequent maintenance.

[0027] A positioning sleeve 4 is coaxially mounted on the shaft 1, and the positioning sleeve 4 and the two ring gears 2 are fitted with a tapered surface to forcibly correct the position of the ring gears 2, thereby significantly enhancing the coaxiality of the ring gears 2 and the shaft 1, and thus improving the transmission accuracy of this split gear shaft.

[0028] In this embodiment, It is preferable that an interference fit is formed between the inner wall of the positioning sleeve 4 and the outer wall of the shaft 1. This connection method not only facilitates assembly, but also ensures the coaxiality of the positioning sleeve 4 and the shaft 1.

[0029] like Figure 1 and Figure 3 As shown, the limiting component 5 has the following structure: The limiting component 5 includes a nut threadedly connected to the shaft 1, and an annular washer 6 is provided between the nut and the corresponding ring gear 2. The annular washer 6 is sleeved on the outside of the shaft 1, and the annular washer 6 is clamped and positioned between the corresponding nut and the corresponding ring gear 2. That is, at this time, the two end faces of the annular washer 6 are respectively pressed against the corresponding nut and the corresponding ring gear 2. The above design facilitates the assembly and disassembly of the ring gear 2.

[0030] Example 2: The structure and principle of Example 2 are basically the same as those of Example 1, except that: Figure 1 and Figure 2 As shown, a rolling bearing 7 is fitted onto the locating sleeve 4. The rolling bearing 7 is an existing product and is readily available on the market. The rolling bearing 7 includes an outer ring and an inner ring 7a, with the inner ring 7a fixedly connected to the locating sleeve 4. The rolling bearing 7 is used for mounting this split-type gear shaft. In the actual product, an interference fit is formed between the inner ring 7a and the locating sleeve 4.

[0031] To further explain, pressure rings 2b are formed on the adjacent end faces of the two ring gears 2, and the pressure rings 2b are coaxial with the ring gears 2. The two pressure rings 2b are respectively pressed against the two end faces of the inner ring 7a. The ring gears 2 are used for both power transmission and axial positioning of the rolling bearings 7, achieving a dual-purpose effect, simplifying the structure and facilitating assembly. Furthermore, the pressure rings 2b and the positioning sleeve 4 are clearance-fitted to form an annular gap 8, and the annular gap 8 is coaxial with the shaft body 1. The above design reduces friction when the ring gears 2 are installed, further facilitating disassembly and assembly. An annular retaining ring 4b is formed on the outer wall of the positioning sleeve 4, and the retaining ring 4b is coaxial with the positioning sleeve 4. The retaining ring 4b is located in one of the annular gaps 8 and presses against the inner ring 7a. The retaining ring 4b is used to press the bearing into the positioning sleeve 4 for positioning, allowing the bearing to be installed in place in one go, further facilitating assembly.

[0032] Example 3: The structure and principle of Example 3 are basically the same as those of Example 1. The difference is that the limiting member 5 is a limiting sleeve. A threaded hole 1 is radially penetrating the side wall of the limiting sleeve. The shaft 1 is provided with a threaded hole 2. The number of threaded holes 1 and threaded holes 2 are the same and their positions correspond one to one. The same bolt is screwed into the threaded holes 1 and threaded holes 2 that correspond to each other.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A modified split-type gear shaft, comprising a shaft body (1) and two ring gears (2) respectively sleeved at both ends of the shaft body (1), wherein both ring gears (2) are connected to the shaft body (1) via a flat key or spline, characterized in that, A positioning sleeve (4) is fitted and fixed in the middle of the shaft (1), and the positioning sleeve (4) and the shaft (1) are coaxially arranged; the two ends of the positioning sleeve (4) extend into the two ring gears (2), and the outer surfaces of both ends of the positioning sleeve (4) have a section of conical surface one (4a). The two conical surfaces one (4a) are symmetrically arranged along the center of the positioning sleeve (4), and the diameter of the conical surface one (4a) gradually increases from the end of the corresponding positioning sleeve (4) towards the middle of the positioning sleeve (4); the inner walls of the two ring gears (2) each have a conical surface two (2a), and the two conical surfaces two (2a) are respectively attached to the two conical surfaces one (4a); the two ends of the shaft (1) are also fitted and detachably fixed with ring-shaped limiting members (5), and the two limiting members (5) are respectively pressed against the opposite end faces of the two ring gears (2).

2. The split gear shaft with the improved structure according to claim 1, characterized in that, An interference fit is formed between the inner wall of the positioning sleeve (4) and the outer wall of the shaft (1).

3. The split gear shaft with the improved structure according to claim 1 or 2, characterized in that, A rolling bearing (7) is fitted on the positioning sleeve (4). The rolling bearing (7) includes an inner ring (7a) and the inner ring (7a) is fixedly connected to the positioning sleeve (4).

4. The split gear shaft with the improved structure according to claim 3, characterized in that, Each of the two ring gears (2) has a pressure ring (2b) formed on its adjacent end face, and the pressure ring (2b) is coaxial with the ring gear (2). The two pressure rings (2b) are pressed against the two end faces of the inner ring (7a) respectively.

5. The split gear shaft with the improved structure according to claim 4, characterized in that, The pressure ring (2b) and the positioning sleeve (4) are fitted together to form an annular gap (8), and the annular gap (8) is coaxially arranged with the shaft (1).

6. The split gear shaft with the improved structure according to claim 5, characterized in that, An interference fit is formed between the inner ring (7a) and the positioning sleeve (4). A ring-shaped retaining ring (4b) is formed on the outer wall of the positioning sleeve (4), and the retaining ring (4b) and the positioning sleeve (4) are coaxially arranged. The retaining ring (4b) is located in one of the annular gaps (8) and presses against the inner ring (7a).

7. The split gear shaft with the improved structure according to claim 1, characterized in that, The limiting component (5) includes a nut that is threadedly connected to the shaft (1), and an annular washer (6) is provided between the nut and the corresponding ring gear (2). The annular washer (6) is sleeved on the outside of the shaft (1) and clamped and positioned between the corresponding nut and the corresponding ring gear (2).

8. The split gear shaft with the improved structure according to claim 1, characterized in that, The limiting component (5) is a limiting sleeve. A threaded hole 1 is radially penetrating the side wall of the limiting sleeve. A threaded hole 2 is provided on the shaft (1). The number of threaded holes 1 and threaded holes 2 are the same and their positions correspond one to one. The same bolt is screwed into the threaded holes 1 and threaded holes 2 that correspond to each other.

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