Reduction gearbox body

Abstract

The utility model aims to provide a reduction gearbox body, which comprises an input side box body (2), a side box body (3) and an output side box body (4), the input side box body (2) is connected with the output side box body (4) and the side box body (3), the input side box body (2) is provided with a first bearing seat and a second bearing seat, and the output side box body (4) is connected with the side box body (3). The side box body is composed of a first arc part, a second arc part and two straight line parts, the two straight line parts are tangent to the first arc part and the second arc part, and the circle center of the first arc part coincides with the circle center of the first bearing seat.

Description

Technical Field

[0001] The utility model relates to a reduction box body. Background Art

[0002] The reduction gearbox is the transmission system in the fracturing equipment. It is connected between the crankcase and the power input of the engine. Through the different speed change designs of the gears inside the reduction gearbox, the converted power is transmitted to the crankcase, thereby achieving the effect of reducing speed and increasing torque or increasing speed and reducing torque, providing different transmission capabilities for the fracturing equipment.

[0003] However, the conventional reduction gearbox housing is very heavy, which not only increases the casting cost but is also extremely inconvenient in installation, maintenance and transportation.

[0004] In addition, when the transmission of the parallel stage reduction gearbox is relatively large, the diameter difference between the input gear and the output gear is also very large, and the shape of the shell surrounding the parallel stage reduction gearbox is also inconsistent due to the large size difference, which will cause the overall shape of the reduction gearbox to be round and clumsy. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a reduction gear box housing, which can reduce the weight of the reduction gear box and improve the housing shape.

[0006] In the first aspect of the utility model, a reduction gearbox housing is provided, which includes an input side housing, a side housing and an output side housing, and is characterized in that the input side housing, the output side housing and the side housing are connected together, a first bearing seat and a second bearing seat are arranged on the input side housing, and the side housing is composed of a first arc portion, a second arc portion and two straight portions, the two straight portions are tangent to the first arc portion and the second arc portion, and the center of the first arc portion coincides with the center of the first bearing seat.

[0007] In another aspect of the utility model, a reduction gearbox housing is provided, which includes an input side housing, a side housing and an output side housing, and is characterized in that the input side housing, the output side housing and the side housing are connected together, the input side housing is provided with a first bearing seat and a second bearing seat, the side housing is composed of a first arc portion, a second arc portion and two straight portions, the two straight portions are tangent to the first arc portion and the second arc portion, and the first center of the first arc portion is located on the line between the second center of the first bearing seat and the third center of the second bearing seat.

[0008] In yet another aspect of the present invention, the radius of the first arc portion is 1.2-1.8 times the radius of the gear supported by the first bearing seat.

[0009] In another aspect of the present invention, the distance between the first center of the circle and the second center of the circle is between 50-150 mm.

[0010] In another aspect of the utility model, a reduction gearbox housing is provided, which includes an input side housing, a side housing and an output side housing, and is characterized in that the input side housing, the output side housing and the side housing are connected together, a first bearing seat and a second bearing seat are arranged on the input side housing, and in the front view, in the horizontal direction of the line connecting the first center of the first bearing seat and the second center of the second bearing seat, the side housing has a first straight line segment in the vertical direction perpendicular to the horizontal direction.

[0011] In yet another aspect of the present invention, in the front view, the side box has a second straight line segment parallel to the horizontal direction, and the second straight line segment overlaps with the second circle center in the vertical direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A three-dimensional view of the utility model cut along the reduction gearbox housing is shown.

[0013] Figure 2 The first front view of the outer structure of the box body in the present invention is exemplarily shown.

[0014] Figure 3 The second appearance structure front view of the box body in the present invention is exemplarily shown.

[0015] Figure 4 The third external structure front view of the box body in the present invention is exemplarily shown. DETAILED DESCRIPTION

[0016] Figure 1 A three-dimensional view of the utility model cut along the reduction gearbox housing is shown; Figure 2 The first front view of the box body in the utility model is exemplarily shown; Figure 3 The second appearance structure front view of the box body in the utility model is exemplarily shown; Figure 4 The third external structure front view of the box body in the present invention is exemplarily shown.

[0017] like Figure 1 As shown, the reduction box housing 1 is composed of a left housing 2 located at one side of the reduction box input end, a side housing 3 and a right housing 4 located at one side of the reduction box output end. In the present utility model, the left housing 2 and the right housing 4 are connected to the side housing 3 by bolts arranged along the outer edge of the housing.

[0018] Here, although bolts are used to connect the left and right boxes and the side boxes in the figure, other methods can also be used for connection, such as welding.

[0019] In the utility model, the reduction box housing at least contains a parallel-stage gear reduction box, the parallel-stage gear comprises a pinion at the input end and a large gear meshing with the pinion. The reduction box housing is also provided with a bearing seat for supporting the bearing of the pinion and a bearing seat for supporting the bearing of the large gear.

[0020] exist Figure 2-Figure 4 In the figure, the small gear on the left is the input end gear, the center of the small gear and the corresponding bearing seat on the left box body 2 is O1, and the radius of the small gear is R1. The large gear on the right is the output end gear, the center of the large gear and the corresponding bearing seat on the left box body 2 is O2, and the radius of the large gear is R2.

[0021] like Figure 2 As shown, since the side box body 3 needs to surround the input end gear and the output end gear, its outer contour is formed into an arc-shaped portion near the input end gear and the output end gear, wherein the center of the arc portion near the pinion bearing seat coincides with the center of the pinion bearing seat, both are O1, and the center of the arc portion near the large gear bearing seat coincides with the center of the large gear bearing seat, both are O2.

[0022] In addition, the side box body 3 also includes two straight line portions, which are tangent to the arc portion near the pinion bearing seat and the arc portion near the gear bearing seat. In other words, the side box body 3 is composed of the arc portion near the pinion bearing seat, the arc portion near the gear bearing seat, and two straight line portions tangent to the two arc portions.

[0023] exist Figure 2 In the structure shown, the center of the arc portion close to the pinion bearing seat side coincides with the center of the pinion bearing seat, that is, the first bearing seat in the utility model refers to the pinion bearing seat, and the first arc portion refers to the arc portion close to the pinion bearing seat side, and at the same time, the second bearing seat refers to the large gear bearing seat, and the second arc portion refers to the arc portion close to the large gear bearing seat side.

[0024] However, the present invention is not limited thereto, and the first bearing seat may also refer to the large gear bearing seat, and in this case, the second bearing seat refers to the small gear bearing seat. In this case, the first arc portion corresponds to the arc portion close to the large gear bearing seat, and the second arc portion corresponds to the arc portion close to the small gear bearing seat.

[0025] The explanations about the first bearing seat, the second bearing seat, the first arc portion, and the second arc portion are also applicable to the structure below, so they will not be repeated here.

[0026] In addition, the box structure of the utility model is not limited to Figure 2 In the structure shown, the arc portion of the side box body 3 may not coincide with the center of the bearing seat.

[0027] like Figure 3 As shown in the figure, the center of the arc portion close to the pinion bearing seat is O3, and the radius is R3. Figure 3 It can be seen that the radius R3 of the arc portion is greater than the radius R1 of the pinion gear, so the center O3 of the arc portion is located on the line between the center O1 of the pinion gear bearing seat and the center O2 of the gear bearing seat.

[0028] In the present invention, R1<R3<R2, preferably the radius R3 is 1.2-1.8 times of the radius R1, and more preferably the distance between the center O3 of the arc portion with radius R3 and the center of the pinion bearing seat O1 is between 50-150 mm.

[0029] pass Figure 3 The structure shown can reduce the significant difference in size between the portion accommodating the small gear and the portion accommodating the large gear in the outer shape of the housing.

[0030] in addition, Figure 4 Shown in Figure 3 Further improvement on the structure of Figure 4 As shown, at the part where the line between the center O1 and the center O2 (horizontal direction) intersects with the reduction gearbox body, the side body 3 is formed into straight line segments L2 and L3, and the left body 2 and the right body (not shown) are formed into the shape of corresponding parts with straight line segments.

[0031] Preferably, in the vertical direction perpendicular to the connecting line direction, at the part where the vertical line passing through the center of the circle O2 intersects with the gearbox housing, the side housing 3 is also formed into a straight line segment L1. Figure 4 It can be seen that the straight line segment L1 overlaps with the center of the circle O2 in the vertical direction. Meanwhile, the left box 2 and the right box 4 are formed into shapes in which corresponding parts have straight line segments.

[0032] The lengths of the straight segments L1, L2 and L3 are not limited, as long as the distance between the side box body 3 and the top of the gear can be ensured to be greater than 10 mm.

[0033] This structure can not only reduce the overall size of the reduction box and reduce the weight of the reduction box body, but also reduce the bulkiness of the reduction box appearance through the contour structure with straight line segments.

[0034] In addition, although Figure 4 It is shown in Figure 3 The improved scheme is based on the structure of Figure 4 In the box shown in the figure including the straight line segments L1-L3, the same Figure 2The structure in which the center of the arc portion of the side box body shown in the figure overlaps with the center of the gear.

[0035] In summary, the utility model provides a reduction gear box body, and by changing the shape of the reduction gear box body, it can not only reduce the size of the reduction gear box, reduce the weight of the body, and save costs, but also make the shape of the reduction gear box more beautiful.

[0036] Reference numerals list

[0037] 1 reduction box housing 2 left housing 3 side housing 4 right housing

Claims

1. A reduction gearbox housing, comprising an input side housing (2), a side housing (3) and an output side housing (4), It is characterized in that The input side box (2), the output side box (4) and the side box (3) are connected together. The input side box body (2) is provided with a first bearing seat and a second bearing seat, the side box body is composed of a first arc portion, a second arc portion and two straight portions, the two straight portions are tangent to the first arc portion and the second arc portion, The center of the first arc portion coincides with the center of the first bearing seat.

2. A reduction gearbox housing, comprising an input side housing (2), a side housing (3) and an output side housing (4), It is characterized in that The input side box (2), the output side box (4) and the side box (3) are connected together. The input side box body (2) is provided with a first bearing seat and a second bearing seat, the side box body is composed of a first arc portion, a second arc portion and two straight portions, the two straight portions are tangent to the first arc portion and the second arc portion, The first center of the first arc portion is located on a line connecting the second center of the first bearing seat and the third center of the second bearing seat.

3. The reduction gearbox housing according to claim 2, characterized in that: The radius of the first arc portion is 1.2-1.8 times the radius of the gear supported by the first bearing seat.

4. The reduction gearbox housing according to claim 3, characterized in that: The distance between the first center of the circle and the second center of the circle is between 50-150 mm.

5. A reduction gearbox housing, comprising an input side housing (2), a side housing (3) and an output side housing (4), It is characterized in that The input side box (2), the output side box (4) and the side box (3) are connected together. The input side housing (2) is provided with a first bearing seat and a second bearing seat. In the front view, in the horizontal direction of the line connecting the first center of the first bearing seat and the second center of the second bearing seat, the side box (3) has a first straight line segment in the vertical direction perpendicular to the horizontal direction.

6. The reduction gearbox housing according to claim 5, characterized in that: In the front view, the side box (3) has a second straight line segment portion parallel to the horizontal direction, and the second straight line segment portion overlaps with the second circle center in the vertical direction.

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