Heavy-load gearbox convenient to overhaul

Abstract

The utility model discloses a heavy load gear box convenient to overhaul, which comprises a lower box body, an upper box body, an input shaft, two output shafts, a gear reduction mechanism and an upper cover, the upper box body is detachably arranged at the top of the lower box body, a cavity, an input port and two output ports are formed between the upper box body and the lower box body, and the input port and the two output ports are communicated with the cavity. The input shaft is rotationally installed at the input port, the two output shafts are rotationally installed at the two output ports respectively, the gear reduction mechanism is arranged in the cavity, the output shafts are in transmission connection with the two output shafts through the gear reduction mechanism, an access hole is formed in the top of the upper box body, and the access hole is communicated with the access hole. And the upper cover is detachably mounted at the access hole and is matched with the access hole in a plugging manner. According to the utility model, the internal structure is directly overhauled through the access hole, and the upper box body does not need to be disassembled, so that the maintenance work of maintenance personnel is facilitated, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy-duty combined gear boxes for Danieli rolling mills, in particular to a heavy-duty gear box which is easy to repair. Background Art

[0002] The gearbox body of the traditional Danieli rolling mill combined gearbox structure consists of two parts: the lower box body and the upper box body. The gearbox is composed of an input gear pair that transmits horizontally to several intermediate cylindrical gear pairs, and then vertically to the lower short output shaft through the differential cylindrical gear pair on the upper long output shaft, that is, it is transmitted to the two output shafts through the differential cylindrical gear pair to drive the rolling mill to work. When the gearbox of this structure is repaired on site, the bolts and all studs connecting the joint surface of the upper box body and the lower box body need to be disassembled to observe the use of the gears and bearings inside the gearbox, which makes the on-site maintenance time long and the efficiency low. Summary of the invention

[0003] In view of the above problems of the existing Danieli type rolling mill combined gearbox, the present invention aims to provide a heavy-duty gearbox which is easy to maintain and has improved maintenance efficiency.

[0004] The specific technical solutions are as follows:

[0005] A heavy-duty gearbox that is easy to maintain, comprising:

[0006] lower box;

[0007] An upper box body, the upper box body is detachably mounted on the top of the lower box body, and a cavity, an input port and two output ports communicated with the cavity are formed between the upper box body and the lower box body;

[0008] An input shaft, the input shaft being rotatably mounted at the input port;

[0009] Two output shafts, the two output shafts are rotatably mounted at the two output ports respectively;

[0010] A gear reduction mechanism, wherein the gear reduction mechanism is disposed in the cavity, and the output shaft is drivingly connected to the two output shafts through the gear reduction mechanism;

[0011] An upper cover, wherein the top of the upper box body is provided with an inspection opening, and the upper cover is detachably mounted at the inspection opening and cooperates with the inspection opening for sealing.

[0012] As a further improvement and optimization of this solution, the lower box body and the upper box body, and the upper cover and the upper box body are both installed by bolts.

[0013] As a further improvement and optimization of this solution, the gear reduction mechanism includes:

[0014] A transmission shaft, the transmission shaft being rotatably mounted in the cavity;

[0015] a first gear set, the first gear set being transmission-connected between the input shaft and the transmission shaft;

[0016] a second gear set, the second gear set being transmission-connected between the transmission shaft and one of the output shafts, and a transmission ratio of the second gear set to the first gear set being greater than one;

[0017] A synchronous gear set is transmission-connected between the two output shafts.

[0018] As a further improvement and optimization of this solution, the transmission shaft, the output shaft, and the two output shafts are arranged parallel to each other.

[0019] As a further improvement and optimization of this solution, the output shaft is located on one side of the lower box body, and the two output shafts are located on the other side of the lower box body.

[0020] As a further improvement and optimization of this solution, the first gear set, the second gear set and the synchronous gear set are all helical gear set structures.

[0021] As a further improvement and optimization of the present solution, one of the two output shafts is a long output shaft and the other output shaft is a short output shaft, and the second gear set is transmission-connected between the transmission shaft and the long output shaft.

[0022] As a further improvement and optimization of this solution, the short output shaft is located below the long output shaft.

[0023] As a further improvement and optimization of the present solution, the axial heights of the input shaft, the transmission shaft, and the long output shaft are equal.

[0024] Compared with the prior art, the above technical solution has the following positive effects:

[0025] In the utility model, when the internal structure of the gear box is inspected and repaired, it is only necessary to remove the upper cover arranged on the top of the upper box body, and the internal structure can be inspected and repaired directly through the inspection port without disassembling the upper box body, thereby facilitating the inspection and repair work of maintenance personnel and improving the inspection and repair efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a heavy-duty gearbox that is easy to repair in the utility model;

[0027] Figure 2 This is a side sectional view of a heavy-duty gearbox that is easy to repair according to the utility model;

[0028] In the accompanying drawings: 1, lower housing; 2, upper housing; 3, upper cover; 4, input shaft; 5, output shaft; 6, gear reduction mechanism; 61, first gear set; 62, transmission shaft; 63, synchronous gear set. DETAILED DESCRIPTION

[0029] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Figure 1 This is a schematic diagram of the structure of a heavy-duty gearbox that is easy to repair in the utility model. Figure 2 The side cross-sectional view of a heavy-duty gearbox that is easy to repair is shown in FIG. Figure 1-2As shown, a preferred embodiment of a heavy-duty gearbox that is easy to repair is shown, including a lower case 1, an upper case 2, an input shaft 4, two output shafts 5, a gear reduction mechanism 6 and an upper cover 3. The upper case 2 is detachably mounted on the top of the lower case 1, and a cavity, an input port and two output ports connected to the cavity are formed between the upper case 2 and the lower case 1. The input shaft 4 is rotatably mounted at the input port, and the two output shafts 5 are rotatably mounted at the two output ports, respectively. The gear reduction mechanism 6 is arranged in the cavity, and the output shaft 5 is transmission-connected to the two output shafts 5 through the gear reduction mechanism 6. The top of the upper case 2 has an inspection port, and the upper cover 3 is detachably mounted at the inspection port and cooperates with the inspection port plugging.

[0033] In this embodiment, when inspecting the internal structure of the gearbox, it is only necessary to remove the upper cover 3 arranged on the top of the upper box body 2, and inspect the internal structure directly through the inspection port without removing the upper box body 2, thereby facilitating the maintenance work of maintenance personnel and improving maintenance efficiency.

[0034] Furthermore, as a preferred embodiment, the lower box body 1 and the upper box body 2, and the upper cover 3 and the upper box body 2 are all installed by bolts.

[0035] Furthermore, as a preferred embodiment, the gear reduction mechanism 6 includes a transmission shaft 62, a first gear group 61, a second gear group (not shown in the figure) and a synchronous gear group 63. The transmission shaft 62 is rotatably installed in the cavity, the first gear group 61 is transmission-connected between the input shaft 4 and the transmission shaft 62, the second gear group is transmission-connected between the transmission shaft 62 and one of the output shafts 5, and the transmission ratios of the second gear group and the first gear group 61 are both greater than one, and the synchronous gear group 63 is transmission-connected between the two output shafts 5.

[0036] Specifically, the transmission ratio of the synchronous gear set 63 is equal to one, so that the two output shafts 5 rotate synchronously.

[0037] Furthermore, as a preferred embodiment, the transmission shaft 62, the output shaft 5, and the two output shafts 5 are arranged parallel to each other.

[0038] Furthermore, as a preferred embodiment, the output shaft 5 is located on one side of the lower housing 1 , and the two output shafts 5 are located on the other side of the lower housing 1 .

[0039] Furthermore, as a preferred embodiment, the first gear set 61, the second gear set and the synchronous gear set 63 are all helical gear set structures, which have the advantages of excellent meshing transmission capability, long service life and compact structure.

[0040] In another embodiment, the first gear set 61 , the second gear set and the synchronous gear set 63 may also be spur gear sets.

[0041] The utility model also has the following implementation methods based on the above:

[0042] One of the two output shafts 5 is a long output shaft, and the other output shaft is a short output shaft. The second gear set is transmission-connected between the transmission shaft 62 and the long output shaft.

[0043] Furthermore, as a preferred embodiment, in order to reduce the overall length of the gearbox, the short output shaft is located below the long output shaft.

[0044] Furthermore, as a preferred embodiment, the axial heights of the input shaft 4, the transmission shaft 62, and the long output shaft are equal.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A heavy-duty gearbox that is easy to maintain, characterized in that: include: lower box; An upper box body, the upper box body is detachably mounted on the top of the lower box body, and a cavity, an input port and two output ports communicated with the cavity are formed between the upper box body and the lower box body; An input shaft, the input shaft being rotatably mounted at the input port; Two output shafts, the two output shafts are rotatably mounted at the two output ports respectively; A gear reduction mechanism, wherein the gear reduction mechanism is disposed in the cavity, and the output shaft is drivingly connected to the two output shafts through the gear reduction mechanism; An upper cover, wherein the top of the upper box body is provided with an inspection opening, and the upper cover is detachably mounted at the inspection opening and cooperates with the inspection opening for sealing.

2. The heavy-duty gearbox that is easy to maintain according to claim 1, characterized in that: The lower box body and the upper box body, and the upper cover and the upper box body are all installed by bolts.

3. The heavy-duty gearbox that is easy to maintain according to claim 1, characterized in that: The gear reduction mechanism comprises: A transmission shaft, the transmission shaft being rotatably mounted in the cavity; a first gear set, the first gear set being transmission-connected between the input shaft and the transmission shaft; a second gear set, the second gear set being transmission-connected between the transmission shaft and one of the output shafts, and a transmission ratio of the second gear set to the first gear set being greater than one; A synchronous gear set is transmission-connected between the two output shafts.

4. The heavy-duty gearbox that is easy to maintain according to claim 3 is characterized in that: The transmission shaft, the output shaft, and the two output shafts are arranged parallel to each other.

5. The heavy-duty gearbox that is easy to maintain according to claim 4, characterized in that: The output shaft is located on one side of the lower box body, and the two output shafts are located on the other side of the lower box body.

6. The heavy-duty gearbox that is easy to maintain according to claim 5, characterized in that: The first gear set, the second gear set and the synchronous gear set are all helical gear set structures.

7. The heavy-duty gearbox that is easy to maintain according to claim 5, characterized in that: One of the two output shafts is a long output shaft, and the other output shaft is a short output shaft, and the second gear set is transmission-connected between the transmission shaft and the long output shaft.

8. The heavy-duty gearbox that is easy to maintain according to claim 7, characterized in that: The short output shaft is located below the long output shaft.

9. The heavy-duty gearbox that is easy to maintain according to claim 8, characterized in that: The input shaft, the transmission shaft, and the long output shaft have the same axial height.

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