Transmission gear of gear reducer

Abstract

The utility model provides a transmission gear of a gear reducer, and belongs to the technical field of machinery. The problem that an existing gear structure is not stable is solved. The transmission gear of the gear reducer comprises a front shaft and a rear shaft which are coaxially arranged, a bevel gear part is arranged at the rear end of the front shaft, a gear part is formed on the outer wall of the front end of the front shaft, the front end of the rear shaft is pressed on the bevel gear part, and the front end of the rear shaft and the bevel gear part are fixedly connected into a whole in a friction welding mode. An annular connecting groove is formed in the rear end face of the conical tooth part, the front end of the rear shaft is further sleeved with a positioning sleeve, the rear end of the positioning sleeve is fixedly connected with the front end of the rear shaft in a close fit mode, and the front end of the positioning sleeve is embedded in the connecting groove. The transmission gear of the gear reducer is stable in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a gear reduction box, in particular to a transmission gear of the gear reduction box. Background Art

[0002] Transmission gears are an important part of mechanical transmission, transmitting power and changing the direction of movement through the meshing between gears.

[0003] Existing transmission gears include a driving bevel gear and axle disclosed in the China Patent Library (application number: 202121971342.X), wherein the driving bevel gear is installed in the main reducer, including: an input shaft having a driving end and a driven end arranged opposite to the driving end, the driven end having a driving gear integrally formed with the input shaft, the driving gear being used to connect the driven gear of the main reducer, and the driving gear having a mounting end away from the driving end; a connecting shaft coaxial with the input shaft, having a fixed end and a connecting end arranged opposite to the fixed end, the fixed end being fixedly connected to the mounting end, and the connecting end being used to connect to the bearing of the main reducer; an annular weld is formed between the outer peripheral wall of the fixed end and the end face of the mounting end, and the weld is filled with solder.

[0004] In the above bevel gear, the fixed end and the mounting end are fixed together by welding. In actual processing, a cold weld may occur, which causes the bevel gear to break when rotating at high speed, affecting its use. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a gear reduction box transmission gear with stable structure.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a gear reduction box transmission gear, including a coaxially arranged front axle and rear axle, the rear end of the front axle is a bevel gear portion, and a gear portion is formed on the outer wall of the front end of the front axle, characterized in that the front end of the rear axle is pressed on the bevel gear portion, and the front end of the rear axle and the bevel gear portion are fixedly connected as a whole by friction welding; an annular connecting groove is opened on the rear end surface of the bevel gear portion, and the connecting groove and the front axle are coaxially arranged; the front end of the rear axle is also covered with a positioning sleeve, the rear end of the positioning sleeve is tightly fitted and fixedly connected with the front end of the rear axle, and the front end of the positioning sleeve is embedded in the connecting groove.

[0007] The rear axle and the front axle are fixedly connected by friction welding to form a whole, which can not only enhance the stability and firmness of the connection between the two, but also increase the connection accuracy between the two and improve the stability and accuracy of the transmission gear operation.

[0008] At the same time, one end of the locating sleeve is tightly fitted and fixedly connected to the rear axle, and the other end of the locating sleeve is embedded in the connecting groove. This not only strengthens the connection strength between the front axle and the rear axle, but also protects the connection part between the front axle and the rear axle, further enhancing the structural stability of the transmission gear.

[0009] In the above-mentioned gear reduction box transmission gear, the above-mentioned rear axle is also sleeved with a bearing, which includes an outer ring and an inner ring fixedly connected to the rear axle, and the front end of the inner ring is pressed on the front end surface of the positioning sleeve. The positioning sleeve can not only further strengthen the connection strength between the front axle and the rear axle, but also support and axially limit the bearing, that is, in this application, the positioning sleeve has a dual purpose, which simplifies the structure and facilitates assembly.

[0010] In the above-mentioned gear reduction box transmission gear, the inner diameter of the connecting groove is larger than the outer diameter of the rear axle.

[0011] In the above-mentioned gear reducer transmission gear, the axial cross section of the positioning sleeve is L-shaped, the front end face of the positioning sleeve is pressed tightly against the bottom wall of the connecting groove, and an annular gap coaxially arranged with the rear shaft is formed between the positioning sleeve, the bevel gear part and the rear shaft. When in use, the annular gap is used to accommodate the deformation formed by the friction welding of the rear shaft and the bevel gear part, so that the positioning sleeve can be smoothly pressed in without grinding, which further facilitates assembly.

[0012] In the above-mentioned gear reducer transmission gear, the front end side wall of the positioning sleeve has a conical introduction surface, and the introduction surface extends to the front end surface of the positioning sleeve. The introduction surface is provided for installation guidance so that the front end of the positioning sleeve can be more smoothly embedded in the connecting groove.

[0013] In the above-mentioned gear reduction box transmission gear, a ring-shaped limiting member is sleeved and fixed on the rear end of the rear axle, and the limiting member is pressed on the rear end surface of the inner ring to enhance the axial limiting effect of the bearing.

[0014] In the above-mentioned transmission gear of the gear reduction box, an annular groove is provided on the outer wall of the rear end of the rear axle, and the limiting member is a retaining spring installed in the annular groove.

[0015] As another solution, in the above-mentioned gear reduction box transmission gear, the limiting member is a pressure ring screwed on the rear axle.

[0016] In the above-mentioned transmission gear of the gear reduction box, at least two through holes are axially penetrated on the gear portion to reduce the weight of the transmission gear.

[0017] In the above-mentioned transmission gear of the gear reduction box, the through hole is in an arc shape coaxial with the front axle, and a plurality of through holes are evenly distributed along the circumference of the front axle to further reduce the weight of the transmission gear.

[0018] Compared with the prior art, the transmission gear of the gear reducer has the following advantages:

[0019] 1. The rear axle and the front axle are connected as a whole by friction welding, which can not only enhance the stability and firmness of the connection between the two, but also increase the connection accuracy between the two and improve the running stability and accuracy of the transmission gear.

[0020] 2. One end of the positioning sleeve is tightly connected to the rear axle, and the other end of the positioning sleeve is embedded in the connecting groove. This can not only strengthen the connection strength between the front axle and the rear axle, but also protect the connection part between the front axle and the rear axle, further enhancing the structural stability of the transmission gear.

[0021] 3. The locating sleeve can not only further strengthen the connection strength between the front axle and the rear axle, but also be used to support and axially limit the bearing. That is, in this application, the locating sleeve has a dual purpose, which simplifies the structure and facilitates assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional schematic diagram of the transmission gear of the gear reduction box.

[0023] Figure 2 yes Figure 1 A magnified schematic diagram of center A.

[0024] Figure 3 It is a three-dimensional schematic diagram of the front axle.

[0025] In the figure, 1, front axle; 1a, bevel gear portion; 1a1, connecting groove; 1b, gear portion; 1b1, through hole; 2, rear axle; 3, positioning sleeve; 3a, guide surface; 4, annular gap; 5, bearing; 5a, outer ring; 5b, inner ring; 6, limit piece. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments. Embodiment 1

[0027] like Figure 1 As shown, the transmission gear of the gear reduction box includes a front axle 1 and a rear axle 2 which are coaxially arranged.

[0028] in,

[0029] The rear end of the front axle 1 is a bevel gear portion 1a, and the diameter of the bevel gear portion 1a gradually decreases from front to back; a gear portion 1b is formed on the outer wall of the front end of the front axle 1, and the gear portion 1b is coaxially arranged with the front axle 1. In actual products, the type of the gear portion 1b is a helical gear.

[0030] The front end of the rear axle 2 is pressed on the bevel gear portion 1a, and the front end of the rear axle 2 and the bevel gear portion 1a are fixedly connected as a whole by friction welding. The friction welding process is a prior art and will not be described in detail here. Figure 2 and Figure 3 As shown, the rear end surface of the bevel gear portion 1a is provided with an annular connecting groove 1a1, and the connecting groove 1a1 is coaxially arranged with the front axle 1. The front end of the rear axle 2 is also covered with a positioning sleeve 3, the shape and size of the rear end of the positioning sleeve 3 match the front end of the rear axle 2, and the rear end of the positioning sleeve 3 is tightly matched and fixedly connected with the front end of the rear axle 2; the shape and size of the front end of the positioning sleeve 3 match the connecting groove 1a1, and the front end of the positioning sleeve 3 is embedded in the connecting groove 1a1.

[0031] The rear axle 2 and the front axle 1 are fixedly connected to form a whole by friction welding, which can not only enhance the connection stability and firmness of the two, but also increase the connection accuracy of the two and improve the running stability and accuracy of the transmission gear.

[0032] At the same time, one end of the positioning sleeve 3 is tightly fitted and fixedly connected to the rear axle 2, and the other end of the positioning sleeve 3 is embedded in the connecting groove 1a1. This not only strengthens the connection strength between the front axle 1 and the rear axle 2, but also protects the connection part between the front axle 1 and the rear axle 2, further enhancing the structural stability of the transmission gear.

[0033] Further explanation, such as Figure 2 As shown, the inner diameter of the connecting groove 1a1 is larger than the outer diameter of the rear axle 2; the axial cross section of the positioning sleeve 3 is L-shaped, the front end face of the positioning sleeve 3 is pressed tightly against the bottom wall of the connecting groove 1a1, and the positioning sleeve 3, the bevel gear portion 1a and the rear axle 2 form an annular gap 4 coaxially arranged with the rear axle 2. When in use, the annular gap 4 is used to accommodate the deformation formed by the friction welding of the rear axle 2 and the bevel gear portion 1a, so that the positioning sleeve 3 can be smoothly pressed in without grinding, which further facilitates assembly.

[0034] like Figure 1 and Figure 2 As shown, the rear axle 2 is also sleeved with a bearing 5, which is a ball bearing 5, and includes an outer ring 5a and an inner ring 5b fixedly connected to the rear axle 2, and the front end of the inner ring 5b is pressed on the front end surface of the positioning sleeve 3. The positioning sleeve 3 can not only further strengthen the connection strength between the front axle 1 and the rear axle 2, but also support and axially limit the bearing 5, that is, in this application, the positioning sleeve 3 has a dual purpose, which simplifies the structure and facilitates assembly. Further explanation, the rear end of the rear axle 2 is sleeved and fixed with a ring-shaped limiting member 6, and the limiting member 6 is pressed on the rear end surface of the inner ring 5b to strengthen the axial limiting effect of the bearing 5.

[0035] In this embodiment, an annular groove is provided on the outer wall of the rear end of the rear axle 2 , the annular groove and the rear axle 2 are coaxially arranged, and the limiting member 6 is a retaining spring installed in the annular groove.

[0036] In actual products, the front end side wall of the positioning sleeve 3 has a tapered introduction surface 3a, and the introduction surface 3a extends to the front end surface of the positioning sleeve 3. The introduction surface 3a is provided for installation guidance, so that the front end of the positioning sleeve 3 can be more smoothly inserted into the connecting groove 1a1. Figure 1 and Figure 3 As shown, at least two through holes 1b1 are axially penetrated on the gear part 1b to reduce the weight of the transmission gear. Preferably, the through hole 1b1 is in an arc shape coaxial with the front axle 1, and multiple through holes 1b1 are evenly distributed along the circumference of the front axle 1 to further reduce the weight of the transmission gear. Embodiment 2

[0037] The structure and principle of the second embodiment are basically the same as those of the first embodiment, except that the limiting member 6 is a pressure ring screwed onto the rear axle 2 .

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A gearbox transmission gear, comprising a front shaft (1) and a rear shaft (2) arranged coaxially, the rear end of the front shaft (1) being a bevel gear portion (1a), and a gear portion (1b) being formed on the outer wall of the front end of the front shaft (1), characterized in that: The front end of the rear axle (2) is pressed onto the bevel gear portion (1a), and the front end of the rear axle (2) and the bevel gear portion (1a) are fixedly connected to form a whole by friction welding; an annular connecting groove (1a1) is provided on the rear end surface of the bevel gear portion (1a), and the connecting groove (1a1) and the front axle (1) are coaxially arranged; the front end of the rear axle (2) is also covered with a positioning sleeve (3), the rear end of the positioning sleeve (3) is tightly matched and fixedly connected to the front end of the rear axle (2), and the front end of the positioning sleeve (3) is embedded in the connecting groove (1a1).

2. The gear reduction box transmission gear according to claim 1, characterized in that: The rear axle (2) is also sleeved with a bearing (5), the bearing (5) comprising an outer ring (5a) and an inner ring (5b) fixedly connected to the rear axle (2), and the front end of the inner ring (5b) is pressed against the front end surface of the positioning sleeve (3).

3. The gear reduction box transmission gear according to claim 1, characterized in that: The inner diameter of the connecting groove (1a1) is larger than the outer diameter of the rear axle (2).

4. The gear reduction box transmission gear according to claim 3, characterized in that: The axial cross section of the positioning sleeve (3) is L-shaped, the front end surface of the positioning sleeve (3) is tightly pressed against the bottom wall of the connecting groove (1a1), and the positioning sleeve (3), the bevel gear portion (1a) and the rear shaft (2) form an annular gap (4) coaxially arranged with the rear shaft (2).

5. The gear reduction box transmission gear according to claim 4, characterized in that: A conical introduction surface (3a) is provided on the front end side wall of the positioning sleeve (3), and the introduction surface (3a) extends to the front end surface of the positioning sleeve (3).

6. The gear reduction box transmission gear according to claim 2, characterized in that: A ring-shaped limiting member (6) is sleeved and fixed on the rear end of the rear axle (2), and the limiting member (6) is pressed on the rear end surface of the inner ring (5b).

7. The gear reduction box transmission gear according to claim 6, characterized in that: An annular groove is provided on the outer wall of the rear end of the rear axle (2), and the limiting member (6) is a retaining spring installed in the annular groove.

8. The gear reduction box transmission gear according to claim 6, characterized in that: The limiting member (6) is a pressure ring screwed onto the rear axle (2).

9. The gear reduction box transmission gear according to claim 1, characterized in that: At least two through holes (1b1) are axially penetrated through the gear part (1b).

10. The gear reduction box transmission gear according to claim 9, characterized in that: The through hole (1b1) is in the shape of an arc coaxial with the front axle (1), and a plurality of through holes (1b1) are evenly distributed along the circumference of the front axle (1).

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