Transmission case of grain leveling robot

Abstract

According to the transmission case of the grain leveling robot, an axial positioning end face (12) is arranged in a body (1), an output shaft (2) is inserted into the body (1) from one side of a first sleeving hole (6), and a second bearing (11) is axially positioned through the axial positioning end face (12) to form second axial positioning; the inner side end face of the first end cover (4) conducts axial positioning on the first bearing (10) to form first axial positioning, and the output shaft (2) is integrally and axially positioned through the first axial positioning and second axial positioning. Or, the inner side end face of the first end cover (4) axially positions the first bearing (10) to form third axial positioning, the inner side end face of the second end cover (5) axially positions the second bearing (11) to form fourth axial positioning, and the output shaft (2) is integrally axially positioned through the third axial positioning and the fourth axial positioning; the mounting structure is convenient to mount, cost is reduced, and mounting precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grain leveling robots, and specifically relates to a transmission box of a grain leveling robot. Background Art

[0002] At present, there is a kind of grain leveling robot, which includes a transmission box. An output shaft needs to be installed on the transmission box, and then the output shaft is connected to a grain leveling driving wheel. Therefore, how to axially limit and install the output shaft in the transmission box needs to be studied. The current technical solution is to set an end cover at each end of the output shaft, and set a threaded hole at each end of the transmission box. The two threaded holes are coaxially arranged. After the output shaft is installed with bearings and driving gears, it is sleeved in the transmission box, and both ends of the output shaft axially extend out from the corresponding threaded holes. When each end cover is screwed to the corresponding threaded hole, the output shaft is axially limited and installed in the transmission box.

[0003] However, since a threaded hole needs to be machined at each end of the transmission box, the machining cost of the transmission box is relatively high, and the current limiting precision is not high and the adjustment is complex. Moreover, the low precision is not conducive to ensuring the meshing of the driving gear and other gears during the mass production process. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a transmission box of a grain leveling robot, which is convenient for installation, reduces costs and improves the installation precision at the same time.

[0005] Compared with the prior art, the utility model provides a transmission box of a grain leveling robot, which includes a body and an output shaft. An end cover is arranged at each end of the output shaft, and a socket hole is arranged at each end of the transmission box. The two socket holes are coaxially arranged. After the output shaft is installed with bearings and driving gears, it is sleeved in the body, and both ends of the output shaft axially extend out from the corresponding socket holes. When each end cover is connected to the corresponding socket hole, the output shaft is axially limited and installed in the body. The characteristics are that the two end covers are respectively denoted as the first end cover and the second end cover, the two socket holes are respectively denoted as the first socket hole and the second socket hole, the first end cover is socket-fitted with the first socket hole and locked and fixed with each other by a first bolt, the second end cover is socket-fitted with the second socket hole and locked and fixed with each other by a second bolt, bearings are respectively arranged on both sides of the driving gear on the output shaft, and the bearings on both sides are respectively denoted as the first bearing and the second bearing.

[0006] The inner body is provided with an axial positioning end face on one side of the second socket hole. The output shaft equipped with a bearing and a driving gear is inserted into the inner body from one side of the first socket hole, and the second bearing is axially positioned by the axial positioning end face to form a second axial positioning. Then, the first end cover is sleeved and fitted with the first socket hole, and the bottom face of the first socket hole axially positions the first end cover, while the inner side face of the first end cover axially positions the first bearing to form a first axial positioning. The output shaft is axially positioned as a whole by the first axial positioning and the second axial positioning; or, the output shaft equipped with a bearing and a driving gear is inserted into the inner body from one side of the first socket hole and the second socket hole. Then, the first end cover is sleeved and fitted with the first socket hole, and the bottom face of the first socket hole axially positions the first end cover, while the inner side face of the first end cover axially positions the first bearing to form a third axial positioning. The second end cover is sleeved and fitted with the second socket hole, and the bottom face of the second socket hole axially positions the second end cover, while the inner side face of the second end cover axially positions the second bearing to form a fourth axial positioning. The output shaft is axially positioned as a whole by the third axial positioning and the fourth axial positioning.

[0007] After adopting the above structure, compared with the prior art, the utility model has the following advantages:

[0008] Through improvement, on the one hand, the present disclosure changes the threaded connection to a socket connection. Specifically, the first end cover is sleeved and fitted with the first socket hole and locked and fixed with each other by the first bolt, and the second end cover is sleeved and fitted with the second socket hole and locked and fixed with each other by the second bolt. Therefore, the assembly is convenient, the cost is reduced, and in addition, since there is no need to machine threads, it is also beneficial to reduce the wall thickness of the body, thereby reducing weight and cost. On the other hand, on the basis of changing the threaded connection to a socket connection, the output shaft is axially positioned as a whole by the first axial positioning and the second axial positioning, or the output shaft is axially positioned as a whole by the third axial positioning and the fourth axial positioning. Therefore, the installation is convenient, and at the same time, the positioning is convenient, which is beneficial to ensuring the accuracy during mass production and manufacturing.

[0009] In summary, the present disclosure is convenient for installation, while reducing costs and improving the installation accuracy.

[0010] In some embodiments, the output shaft is provided with a positioning step on one side of the first socket hole, and a positioning ring surface is provided inside the driving gear. When the driving gear is sleeved and assembled with the output shaft, the positioning ring surface is axially positioned and matched with the positioning step, and the inner side face of the first bearing axially positions the driving gear; or, the output shaft is provided with a positioning step on one side of the second socket hole, and a positioning ring surface is provided inside the driving gear. When the driving gear is sleeved and assembled with the output shaft, the positioning ring surface is axially positioned and matched with the positioning step, and the inner side face of the second bearing axially positions the driving gear.

[0011] In some embodiments, the inner end face of the first end cap axially positions the outer ring of the first bearing, the inner ring of the first bearing is axially positioned by the left positioning step provided on the output shaft, and the axial positioning end face axially positions the outer ring of the second bearing. The inner ring of the second bearing is axially positioned and cooperates with the drive gear, and the drive gear further axially positions and cooperates with the positioning step, thereby axially positioning the output shaft along the axis and simultaneously axially positioning the drive gear.

[0012] In some embodiments, a keyway is provided at the positioning step of the output shaft, and a transmission key is installed in the keyway. The transmission key is in transmission cooperation with the inner circumference of the drive gear.

[0013] In some embodiments, the body is provided with a positioning connection hole for connecting an electric motor. The axis of the positioning connection hole intersects the axis of the output shaft in a cross shape, and both the first socket hole and the second socket hole are coaxially arranged with the output shaft.

[0014] In some embodiments, the electric motor is provided with a socket portion, and the socket portion is in socket cooperation with the positioning connection hole to position the electric motor and the transmission gear provided on the rotating shaft of the electric motor.

[0015] In some embodiments, the body adopts an integral housing, and the first socket hole, the second socket hole, and the positioning connection hole are provided on the integral housing.

[0016] In some embodiments, a first sealing ring is provided between the first end cap and the output shaft, and a second sealing ring is provided between the second end cap and the output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 1 is a perspective view of a transmission box with an electric motor for a grain leveling robot.

[0018] Figure 2 FIG. 2 is a perspective view of a transmission box with two end caps installed.

[0019] Figure 3 FIG. 3 is a top view of a transmission box with two end caps installed.

[0020] Figure 4 FIG. 4 is a sectional view taken along line A-A.

[0021] Figure 5 FIG. Figure 1 FIG. 5 is a perspective view of the transmission box with the integral housing removed.

[0022] Figure 6 FIG. 6 is a perspective view of a drive gear.

[0023] Figure 7 FIG. 7 is a perspective view of the output shaft.

[0024] Figure 8 A three-dimensional schematic diagram of a driving assembly after removing the leveling driving wheel on the right side and the second end cover.

[0025] Figure 9 The right view of a driving assembly.

[0026] Figure 10 The sectional view taken along line B-B.

[0027] Figure 11 The enlarged schematic diagram of A.

[0028] Explanation of reference numerals: 1 - body, 2 - output shaft, 3 - driving gear, 4 - first end cover, 5 - second end cover, 6 - first socket hole, 7 - second socket hole, 8 - first bolt, 9 - second bolt, 10 - first bearing, 11 - second bearing, 12 - axial positioning end face, 13 - positioning step, 14 - positioning ring face, 15 - keyway, 16 - transmission key, 17 - electric motor, 18 - positioning connection hole, 19 - socket part, 20 - first sealing ring, 21 - second sealing ring, 22 - transmission gear, 23 - leveling driving wheel, 24 - rotating shaft, 25 - spiral blade, 26 - left-side positioning step. Detailed implementation manners

[0029] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other implementation schemes, variant schemes, improvement schemes, equivalent schemes, and other technical schemes that do not depart from the spirit and scope of the present utility model.

[0030] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0031] As Figure 1 shown is a transmission case of a leveling robot provided with an electric motor 17. The transmission case is provided with an output shaft 2, and connecting the output shaft 2 to the leveling driving wheel 23 forms as Figure 8 , 9, the drive assembly of the grain leveling robot shown in Fig. 10. In this example, the grain leveling drive wheel 23 has a spiral blade 25, which is used to drive the grain leveling robot to move forward on the grain pile and push the grain away at the same time. Therefore, the force on the grain leveling drive wheel 23 is relatively large, so good gear meshing transmission is required. And this disclosure is not only convenient for installation but also beneficial to improving the installation accuracy.

[0032] The transmission box described above includes a body 1 and an output shaft 2 for connecting the grain leveling drive wheel 23. An end cover is provided at each end of the output shaft 2, and a socket hole is provided at each end of the transmission box. The two socket holes are coaxially arranged. After the output shaft 2 is installed with bearings and a driving gear 3, it is sleeved in the body 1, and both ends of the output shaft 2 axially extend from the corresponding socket holes. When each end cover is connected to the corresponding socket hole, the output shaft 2 is axially limited and installed in the body 1. The two end covers are respectively denoted as the first end cover 4 and the second end cover 5, and the two socket holes are respectively denoted as the first socket hole 6 and the second socket hole 7.

[0033] The first end cover 4 is socket-fitted with the first socket hole 6 and locked and fixed with each other by a first bolt 8. That is, a connection hole is axially provided in the first end cover 4, and a threaded connection hole is correspondingly provided on the inner bottom surface of the first socket hole 6. The threaded connection hole can be tapped. The processing is convenient and the cost is low. The first bolt 8 axially passes through the connection hole from the outside to the inside and is threadedly connected with the threaded connection hole, thereby fixing the first end cover 4 in the first socket hole 6. In this example, the inner bottom surface of the first socket hole 6 can axially position the first end cover 4. Similarly, the second end cover 5 is socket-fitted with the second socket hole 7 and locked and fixed with each other by a second bolt 9. Bearings are respectively provided on both sides of the driving gear 3 on the output shaft 2, and the two bearings on both sides are respectively denoted as the first bearing 10 and the second bearing 11.

[0034] On the basis of the above socketing and fixing with bolts, how to conveniently install and position the output shaft 2, this disclosure proposes two solutions, namely the first solution and the second solution.

[0035] In the first solution, as Figure 4 、 10As shown in Fig. 11, an axial positioning end face 12 is provided on one side of the second socket hole 7 inside the body 1. The output shaft 2 installed with bearings and the driving gear 3 is inserted into the body 1 from one side of the first socket hole 6, and the second bearing 11 is axially positioned by the axial positioning end face 12 to form a second axial positioning. Then, the first end cover 4 is sleeved and fitted with the first socket hole 6, the bottom surface of the first socket hole 6 axially positions the first end cover 4, and the inner end face of the first end cover 4 axially positions the first bearing 10 to form a first axial positioning. The output shaft 2 is axially positioned as a whole by the first axial positioning and the second axial positioning. That is to say, the positioning is completed by the first end cover 4 and the axial positioning end face 12, so the second end cover 5 is cancelled from participating in the axial positioning. The axial positioning end face 12 limits the stroke of the output shaft 2 installed with bearings and the driving gear 3 inserted into the body 1 from one side of the first socket hole 6. The first solution is more convenient for assembly, reducing the assembly intensity of workers. At the same time, since the bottom surface of the first socket hole 6 and the axial positioning end face 12 are both provided on the body 1, higher unified machining accuracy can be achieved when machining the bottom surface of the first socket hole 6 and the axial positioning end face 12. Therefore, the installation accuracy can be better improved.

[0036] With the first solution, the output shaft 2 and the first end cover 4 can be assembled first, and then the second end cover 5 is installed. The main function of the second end cover 5 is to axially install and limit the second sealing ring 21.

[0037] In the first solution, preferably, as Figure 10 、 11 shown, the inner end face of the first end cover 4 axially positions the outer ring of the first bearing 10, the inner ring of the first bearing 10 is axially positioned by the left positioning step 26 provided on the output shaft 2, and the axial positioning end face 12 axially positions the outer ring of the second bearing 11. The inner ring of the second bearing 11 is axially positioned and fitted with the driving gear 3, and the driving gear 3 is further axially positioned and fitted with the positioning step 13, so as to complete the axial positioning of the output shaft 2 along the axis and complete the axial positioning of the driving gear 3 at the same time.

[0038] In the second solution, the output shaft 2 equipped with bearings and the driving gear 3 is inserted into the main body 1 from one side of the first socket hole 6 and the second socket hole 7. Then, the first end cover 4 is sleeved and fitted with the first socket hole 6, and the bottom surface of the first socket hole 6 axially positions the first end cover 4, while the inner end surface of the first end cover 4 axially positions the first bearing 10 to form a third axial positioning. The second end cover 5 is sleeved and fitted with the second socket hole 7, the bottom surface of the second socket hole 7 axially positions the second end cover 5, and the inner end surface of the second end cover 5 axially positions the second bearing 11 to form a fourth axial positioning. The output shaft 2 is axially positioned as a whole by the third axial positioning and the fourth axial positioning. That is to say, the axial positioning end face 12 is replaced by the second end cover 5. Therefore, the first end cover 4 and the second end cover 5 jointly perform axial positioning. Comparatively speaking, the first solution is more preferable.

[0039] In some embodiments, the output shaft 2 is provided with a positioning step 13 on one side of the first socket hole 6, and a positioning ring surface 14 is provided inside the driving gear 3. When the driving gear 3 is sleeved and assembled with the output shaft 2, the positioning ring surface 14 is axially positioned and fitted with the positioning step 13, and the inner end surface of the first bearing 10 axially positions the driving gear 3; or vice versa, as Figure 6 、 7 、10、11 show that the output shaft 2 is provided with a positioning step 13 on one side of the second socket hole 7, and a positioning ring surface 14 is provided inside the driving gear 3. When the driving gear 3 is sleeved and assembled with the output shaft 2, the positioning ring surface 14 is axially positioned and fitted with the positioning step 13, and the inner end surface of the second bearing 11 axially positions the driving gear 3. In this way, better axial positioning of the driving gear 3 is achieved.

[0040] Furthermore, as Figure 6 、 7 show, the output shaft 2 is provided with a keyway 15 at the positioning step 13, and a transmission key 16 is installed in the keyway 15. The transmission key 16 is in transmission cooperation with the inner circumference of the driving gear 3. In this way, the keyway 15 has a height difference, which facilitates the assembly of the transmission key 16.

[0041] In some embodiments, as Figure 2 、 3 、4、5、10、11 show, the main body 1 is provided with a positioning connection hole 18 for connecting the electric motor 17. The axis of the positioning connection hole 18 intersects the axis of the output shaft 2 in a cross shape, and the first socket hole 6 and the second socket hole 7 are both coaxial with the output shaft 2. In this way, when assembling, the positioning connection hole 18 can be used to accurately install the electric motor 17.

[0042] Furthermore, as Figure 5 、 10, as shown in FIGS. 11, the electric motor 17 is provided with a socket portion 19 which is socket-fitted with the positioning connection hole 18 to position the electric motor 17 and the transmission gear 22 provided on the rotating shaft 24 of the electric motor 17, so that the installation is convenient and it is also beneficial to ensure the meshing accuracy between the transmission gear 22 and the driving gear 3.

[0043] In order to further improve the installation accuracy, as Figure 4 shown, the main body 1 adopts an integral housing, and a first socket hole 6, a second socket hole 7 and a positioning connection hole 18 are provided on the integral housing. The integral housing can be obtained by existing integral forming processes such as die-casting integral forming, casting integral forming, injection molding integral forming, etc., and the first socket hole 6, the second socket hole 7 and the positioning connection hole 18 can obtain rough blanks during integral forming, and the rough blanks are machined to obtain mating surfaces with required accuracy, such as the inner bottom surface of the first socket hole 6, so as to ensure the assembly accuracy in the later stage.

[0044] In order to prevent sundries from entering the main body 1 and causing damage, as Figure 4 , 10 , 11 shown, a first sealing ring 20 is provided between the first end cover 4 and the output shaft 2, and a second sealing ring 21 is provided between the second end cover 5 and the output shaft 2.

[0045] When understanding the present disclosure, if necessary, the above structures can be referred to other embodiments / appendices Figure 1 and understood, and will not be elaborated here.

[0046] The above are only illustrative embodiments of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the protection scope of the present invention patent are included in the protection scope of the present invention patent.

Claims

1. A transmission box of a grain-leveling robot, comprising a body (1) and an output shaft (2) for connecting a grain-leveling driving wheel (23), an end cover is provided at each end of the output shaft (2), a sleeve hole is provided at each end of the transmission box, the two sleeve holes are coaxially arranged, the output shaft (2) is installed with a bearing and a driving gear (3) and then sleeved in the body (1), and the two ends of the output shaft (2) extend axially from the corresponding sleeve holes, when each end cover is connected to the corresponding sleeve hole, the output shaft (2) is axially limited and installed in the body (1), characterized in that: The two end covers are respectively denoted as a first end cover (4) and a second end cover (5); the two sleeve holes are respectively denoted as a first sleeve hole (6) and a second sleeve hole (7); the first end cover (4) is sleeved with the first sleeve hole (6) and is mutually locked and fixed by a first bolt (8); the second end cover (5) is sleeved with the second sleeve hole (7) and is mutually locked and fixed by a second bolt (9); the output shaft (2) is respectively provided with bearings on both sides of the driving gear (3); the bearings on both sides are respectively denoted as a first bearing (10) and a second bearing (11); An axial positioning end face (12) is provided in the body (1) on one side of the second sleeve hole (7), and an output shaft (2) equipped with a bearing and a driving gear (3) is inserted into the body (1) from one side of the first sleeve hole (6), and the second bearing (11) is axially positioned by the axial positioning end face (12) to form a second axial positioning, and then the first end cover (4) is sleeved with the first sleeve hole (6), the bottom face of the first sleeve hole (6) axially positions the first end cover (4), and the inner side end face of the first end cover (4) axially positions the first bearing (10) to form a first axial positioning, and the output shaft (2) is axially positioned as a whole by the first axial positioning and the second axial positioning; or, a bearing and a driving gear are installed The output shaft (2) of the wheel (3) is inserted into the body (1) from one side of the first sleeve hole (6) and the second sleeve hole (7), and then the first end cover (4) is sleeved with the first sleeve hole (6), the bottom surface of the first sleeve hole (6) is axially positioned on the first end cover (4), and the inner end surface of the first end cover (4) is axially positioned on the first bearing (10) to form a third axial positioning, the second end cover (5) is sleeved with the second sleeve hole (7), the bottom surface of the second sleeve hole (7) is axially positioned on the second end cover (5), and the inner end surface of the second end cover (5) is axially positioned on the second bearing (11) to form a fourth axial positioning, and the output shaft (2) is axially positioned as a whole by the third axial positioning and the fourth axial positioning.

2. The transmission box of the grain leveling robot according to claim 1, characterized in that: The output shaft (2) is provided with a positioning step (13) on one side of the first sleeve hole (6), and a positioning annular surface (14) is provided inside the driving gear (3). When the driving gear (3) and the output shaft (2) are sleeved and assembled, the positioning annular surface (14) and the positioning step (13) are axially positioned and matched, and the inner end surface of the first bearing (10) is axially positioned on the driving gear (3); or, the output shaft (2) is provided with a positioning step (13) on one side of the second sleeve hole (7), and a positioning annular surface (14) is provided inside the driving gear (3). When the driving gear (3) and the output shaft (2) are sleeved and assembled, the positioning annular surface (14) and the positioning step (13) are axially positioned and matched, and the inner end surface of the second bearing (11) is axially positioned on the driving gear (3).

3. The transmission box of the grain leveling robot as claimed in claim 2, characterized in that: The inner end face of the first end cover (4) axially positions the outer ring of the first bearing (10), and the inner ring of the first bearing (10) is axially positioned by a left positioning step (26) provided on the output shaft (2), while the axial positioning end face (12) axially positions the outer ring of the second bearing (11), and the inner ring of the second bearing (11) is axially positioned with the driving gear (3), and the driving gear (3) is further axially positioned with the positioning step (13), thereby completing the axial positioning of the output shaft (2) and the driving gear (3) in the axial direction.

4. The transmission box of the grain leveling robot as claimed in claim 2, characterized in that: The output shaft (2) is provided with a keyway (15) at the positioning step (13), and a transmission key (16) is installed in the keyway (15). The transmission key (16) is in transmission cooperation with the inner circumference of the driving gear (3).

5. The transmission box of the grain leveling robot according to claim 1, characterized in that: The body (1) is provided with a positioning connection hole (18) connected to the electric motor (17); the axis of the positioning connection hole (18) and the axis of the output shaft (2) are arranged in a cross-shaped distribution; the first sleeve hole (6) and the second sleeve hole (7) are both arranged coaxially with the output shaft (2).

6. The transmission box of the grain leveling robot as claimed in claim 5, characterized in that: The electric motor (17) is provided with a sleeve portion (19), and the sleeve portion (19) is sleeved and matched with the positioning connection hole (18) to position the electric motor (17) and a transmission gear (22) arranged on a rotating shaft (24) of the electric motor (17).

7. The transmission box of the grain leveling robot as claimed in claim 5, characterized in that: The main body (1) adopts an integrated shell, on which a first sleeve connection hole (6), a second sleeve connection hole (7) and a positioning connection hole (18) are provided.

8. The transmission box of the grain leveling robot as claimed in claim 1, characterized in that: A first sealing ring (20) is provided between the first end cover (4) and the output shaft (2), and a second sealing ring (21) is provided between the second end cover (5) and the output shaft (2).

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