Gearbox rear housing processing tooling

Abstract

The application discloses a gearbox rear housing machining tool, which is used for positioning and fixing the rear housing. The rear housing is provided with a housing seat, the housing seat is provided with a square protruding part and an arc part, the machining tool comprises a fixing bottom plate and a plurality of clamping mechanisms, the fixing bottom plate is provided with an avoiding hole, and the surface of the fixing bottom plate is sequentially distributed with a first positioning column, a second positioning column, a third positioning column and a fourth positioning column in the circumferential direction. After the rear housing is placed in position, the first positioning column is perpendicular to the center of the square protruding part, the second positioning column is perpendicular to the side of the square protruding part, the third positioning column and the fourth positioning column are located on the same side as the second positioning column, and the third positioning column and the fourth positioning column are respectively located on the two sides of the first bearing mounting hole. The plurality of clamping mechanisms are spaced apart and distributed in the circumferential direction of the fixing bottom plate and comprise a lower supporting structure and an upper pressing plate. The lower supporting structure is fixedly arranged on the surface of the fixing bottom plate, so that the positioning of the rear housing is realized through cooperation of the plurality of positioning columns, and the fixing of the rear housing is realized through the plurality of clamping mechanisms.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to a tooling fixture for machining the rear housing of a gearbox, used for positioning and fixing the rear housing. Background Technology

[0002] The rear gearbox housing of a bulldozer is mainly responsible for transmitting engine power to the central drive unit through the torque converter and gearbox, and storing engine oil for lubrication. Its structural design not only needs to ensure efficient power transmission, but also needs to withstand high mechanical stress as a large casting. Therefore, the structural precision of the rear gearbox housing is a key part that needs to be focused on during the manufacturing process.

[0003] In existing technology, the rear gearbox housing includes a housing portion extending axially and a housing base portion. Typically, the housing portion is machined by fixing the housing base portion. However, the housing base portion is not a standard square or circular shape, but rather incorporates both square and curved shapes. Therefore, to achieve precise positioning and fixing of the rear gearbox housing, it is necessary to develop specific tooling.

[0004] Based on this, this application provides a machining fixture for the rear housing of a gearbox, used for positioning and fixing the rear housing. Utility Model Content

[0005] This application provides a machining fixture for the rear housing of a gearbox, which can effectively position and clamp the rear housing.

[0006] This application provides a machining fixture for a gearbox rear housing, used for positioning and fixing the rear housing. The rear housing has a housing base, which has a square protrusion and an arc-shaped portion. The center of the arc-shaped portion has a first bearing mounting hole, and one side of the arc-shaped portion has a second bearing mounting hole. The machining fixture includes a fixed base plate and multiple clamping mechanisms. The fixed base plate has clearance holes that mate with the first and second bearing mounting holes. The surface of the fixed base plate has a first positioning post, a second positioning post, a third positioning post, and a fourth positioning post distributed circumferentially. After the rear housing is placed in position, the first positioning post faces the center of the square protrusion, the second positioning post faces the side of the square protrusion, and the third and fourth positioning posts are located on the same side as the second positioning post. The third and fourth positioning posts are located on both sides of the first bearing mounting hole and face the arc-shaped portion. Multiple clamping mechanisms are spaced apart and distributed around the circumference of the fixed base plate. Each clamping mechanism includes a lower support structure and an upper pressure plate. The lower support structure is fixedly mounted on the surface of the fixed base plate. The upper pressure plate is directionally movable relative to or away from the lower support structure to cooperate with the lower support structure in clamping the outer edge of the housing.

[0007] In one possible implementation, the lower support structure is a support column or a support block.

[0008] In one possible implementation, the first positioning post is a stud and is mounted on the surface of the fixed base plate via a first positioning seat. The first positioning post is threadedly engaged with the first positioning seat and remains parallel to the fixed base plate. The screw head of the first positioning post is located outside the first positioning seat.

[0009] In one possible implementation, the second positioning post is a stud and is mounted on the surface of the fixed base plate via a second positioning seat. The second positioning post is threadedly engaged with the second positioning seat and remains parallel to the fixed base plate. The screw head of the second positioning post is located on the outside of the second positioning seat.

[0010] In one possible implementation, the upper pressure plate has an oblong hole, and a guide stud that mates with the oblong hole is vertically connected to the fixed base plate. An adjusting nut is installed on the top of the guide stud away from the fixed base plate. A rear support column is also vertically connected to the fixed base plate. The lower support structure, the guide stud, and the rear support column are located in the same straight line direction directly opposite the clearance hole.

[0011] In one possible implementation, the clamping mechanism has four clamping mechanisms distributed around the clearance hole, wherein after the rear housing is placed in place, two of the clamping mechanisms are facing the first bearing mounting hole and two of the clamping mechanisms are facing the second bearing mounting hole.

[0012] In one possible implementation, the machining fixture further includes a mounting plate, which is vertically connected to one end of the fixed base plate. The fixed base plate has at least two triangular reinforcing plates vertically connected to its side opposite to the clamping mechanism, and the other right-angled side of the triangular reinforcing plates is vertically connected to the mounting plate.

[0013] In one possible implementation, the triangular reinforcing plate has a relief hole, and there are two triangular reinforcing plates, which are symmetrically distributed on both sides of the relief hole.

[0014] Beneficial effects: Compared with the prior art, the gearbox rear housing machining fixture provided in this application can effectively position the rear housing through the cooperation of four positioning pins, and can effectively clamp and fix the rear housing in the circumferential direction through the clamping mechanism, thereby ensuring the machining quality of the gearbox rear housing.

[0015] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description

[0016] Figure 1 A three-dimensional structural schematic diagram of the machining fixture for the rear gearbox housing of this application is shown.

[0017] Figure 2 This application shows Figure 1 A magnified structural diagram of part A in the middle.

[0018] Figure 3 The diagram shows the main view of the tooling for machining the rear gearbox housing of this application.

[0019] Figure 4 A rear view structural schematic diagram of the machining fixture for the rear gearbox housing of this application is shown.

[0020] Figure 5 A schematic diagram of the structure of the gearbox rear housing machining tooling after the rear housing is fastened is shown.

[0021] Figure 6 A schematic diagram of the structure of the tooling for positioning the gearbox housing during the machining of the gearbox rear housing of this application is shown. Detailed Implementation

[0022] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0023] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0024] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0025] refer to Figures 1 to 6This application provides a gearbox rear housing machining fixture for positioning and fixing the rear housing 10. The rear housing 10 is provided with a housing base 11, and the housing base 11 is provided with a square protrusion 111 and an arc-shaped portion 112. The center of the arc-shaped portion 112 is provided with a first bearing mounting hole 101, and the arc-shaped portion 112 is provided with a second bearing mounting hole 102 on one side of the first bearing mounting hole 101. The bearing is installed through the first bearing mounting hole 101 and the second bearing mounting hole 102, so that the transmission shaft inside the bearing can rotate freely.

[0026] The machining fixture includes a fixed base plate 20 and multiple clamping mechanisms 30. The fixed base plate 20 is provided with clearance holes 201 that mate with the first bearing mounting hole 101 and the second bearing mounting hole 102. Simultaneously, a first positioning post 21, a second positioning post 22, a third positioning post 23, and a fourth positioning post 24 are sequentially distributed circumferentially on the surface of the fixed base plate 20. After the rear housing 10 is placed in position, the first positioning post 21 is directly opposite the center of the square protrusion 111, while the second positioning post 22 is directly opposite the side of the square protrusion 111. Meanwhile, the third positioning post 23, the fourth positioning post 24 and the second positioning post 22 (relative to the first bearing mounting hole 101 and the second bearing mounting hole 102) are located on the same side, and the third positioning post 23 and the fourth positioning post 24 are respectively located on both sides of the first bearing mounting hole 101 and directly opposite the arc-shaped part 112. Thus, the positioning of the square protrusion 111 is achieved by the cooperation of the first positioning post 21 and the second positioning post 22, and the positioning of the arc-shaped part 112 is achieved by the cooperation of the third positioning post 23 and the fourth positioning post 24, resulting in high positioning accuracy.

[0027] Multiple clamping mechanisms 30 are spaced apart around the fixed base plate 20 to clamp and fix the box body 10 around the box base 11. Each clamping mechanism 30 includes a lower support structure 31 and an upper pressure plate 32. The lower support structure 31 is fixedly mounted on the surface of the fixed base plate 20, while the upper pressure plate 32 can move relatively close to or away from the lower support structure 31 to cooperate with the lower support structure 31 in clamping the outer edge of the box base 11. The lower support structure 31 can be a support column, which is simple in structure, easy to manufacture, and low in cost; or it can be a support block, which can provide a relatively large support area and good support stability.

[0028] Therefore, the gearbox rear housing machining fixture provided in this application can simultaneously position the square protrusion 111 and the arc-shaped portion 112 of the rear housing 10 through the cooperation of the first positioning post 21, the second positioning post 22, the third positioning post 23 and the fourth positioning post 24, which can ensure the positioning accuracy of the rear housing 10 during the machining process. At the same time, through the cooperation of multiple clamping mechanisms 30, the rear housing 10 can be well clamped and fixed in the circumference of the rear housing 10, which facilitates the machining of the rear housing 10 and can ensure the machining accuracy of the rear housing 10.

[0029] In one embodiment, the first positioning post 21 is a stud and is mounted on the surface of the fixed base plate 20 via a first positioning seat 211. The first positioning post 21 is threadedly engaged with the first positioning seat 211 and remains parallel to the fixed base plate 20. The screw head 212 of the first positioning post 21 is located outside the first positioning seat 211. Thus, by rotating the screw head 212, the first positioning post 21 can be moved forward relative to the rear housing 10 or backward relative to the rear housing 10, thereby flexibly adjusting the positioning position of the first positioning post 21. This makes it suitable for positioning rear housings 10 of different specifications, making it more convenient to use.

[0030] In one embodiment, the second positioning post 22 is a stud and is mounted on the surface of the fixed base plate 20 via the second positioning seat 221. The second positioning post 22 is threadedly engaged with the second positioning seat 221 and remains parallel to the fixed base plate 20. The screw head 222 of the second positioning post 22 is located outside the second positioning seat 221. Thus, by rotating the screw head 222 of the second positioning post 22, the second positioning post 22 can be moved forward relative to the rear housing 10 or backward relative to the rear housing 10, thereby flexibly adjusting the positioning position of the second positioning post 22. This makes it suitable for positioning rear housings 10 of different specifications, making it more convenient to use.

[0031] In one embodiment, the upper pressure plate 32 has a waist-shaped hole 301, and a guide stud 25 that mates with the waist-shaped hole 301 is vertically connected to the fixed base plate 20. An adjusting nut 26 is installed on the top of the guide stud 25 away from the fixed base plate 20. In addition, a rear support column 27 is vertically connected to the fixed base plate 20. The lower support structure 31, the guide stud 25, and the rear support column 27 are located in the same straight line direction directly opposite the clearance hole 201. Thus, the upper pressure plate 32 can be easily adjusted by the engagement of the waist-shaped hole 301 and the guide stud 25, so that it is relatively closer to or further away from the rear housing 10, that is, the pressing position of the upper pressure plate 32 can be adjusted. At the same time, the upper pressure plate 32 can be easily pressed by rotating the adjusting nut 26. Furthermore, the engagement of the rear support column 27 makes the pressing stability of the upper pressure plate 32 on the rear housing 10 better.

[0032] In one embodiment, four clamping mechanisms 30 are provided, and these four clamping mechanisms 30 are distributed around the clearance hole 201. After the rear housing 10 is placed in position, two of the clamping mechanisms 30 are aligned with the first bearing mounting hole 101, and two of the clamping mechanisms 30 are aligned with the second bearing mounting hole 102, thereby clamping and fixing the rear housing 10 around its entire circumference, resulting in good clamping stability.

[0033] In one embodiment, the machining fixture further includes a mounting plate 40. The mounting plate 40 is vertically connected to one end of the fixed base plate 20. At the same time, the fixed base plate 20 has at least two triangular reinforcing plates 50 vertically connected to its side facing away from the clamping mechanism 30, and the other right-angled side of the triangular reinforcing plate 50 is vertically connected to the mounting plate 40. This allows the mounting plate 40 to be installed on equipment such as machine tools, so that the fixed base plate 20 serves as the machining surface, facing the machining machine. This facilitates the fixing of the rear housing 10 without affecting the positioning and fastening of the rear housing 10, making it more convenient to use. The triangular reinforcing plates 50 can strengthen the connection relationship, making the working stability of the entire machining fixture better.

[0034] In one embodiment, the triangular reinforcing plate 50 has a lightening hole 501 to reduce weight. There are two triangular reinforcing plates 50, symmetrically distributed on both sides of the clearance hole 201. This arrangement does not affect the processing of the rear housing 10, while also ensuring the connection stability of the triangular reinforcing plates 50 to the entire processing fixture.

[0035] It should be noted that the terms "first, second, third and fourth" used in this application are for descriptive purposes only, do not indicate any order, and should not be construed as indicating or implying relative importance. These terms can be interpreted as names.

[0036] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A machining fixture for a gearbox rear housing, used for positioning and fixing the rear housing, wherein the rear housing is provided with a housing base, the housing base having a square protrusion and an arc-shaped portion, the center of the arc-shaped portion having a first bearing mounting hole, and one side of the arc-shaped portion having a second bearing mounting hole, characterized in that... The machining fixture includes a fixed base plate and multiple clamping mechanisms. The fixed base plate is provided with clearance holes that mate with the first bearing mounting hole and the second bearing mounting hole. The surface of the fixed base plate is provided with a first positioning post, a second positioning post, a third positioning post and a fourth positioning post in sequence along the circumference. After the rear box is placed in place, the first positioning post is directly opposite the center of the square protrusion, the second positioning post is directly opposite the side of the square protrusion, the third positioning post and the fourth positioning post are located on the same side as the second positioning post, and the third positioning post and the fourth positioning post are respectively located on both sides of the first bearing mounting hole and are directly opposite the arc-shaped part. Multiple clamping mechanisms are spaced apart and distributed around the circumference of the fixed base plate. Each clamping mechanism includes a lower support structure and an upper pressure plate. The lower support structure is fixedly mounted on the surface of the fixed base plate. The upper pressure plate is directionally movable relative to or away from the lower support structure to cooperate with the lower support structure in clamping the outer edge of the housing.

2. The gearbox rear housing machining fixture as described in claim 1, characterized in that, The lower support structure is a support column or a support block.

3. The machining fixture for the rear gearbox housing as described in claim 1, characterized in that, The first positioning post is a stud and is mounted on the surface of the fixed base plate via a first positioning seat. The first positioning post is threadedly engaged with the first positioning seat and remains parallel to the fixed base plate. The screw head of the first positioning post is located on the outside of the first positioning seat.

4. The gearbox rear housing machining fixture as described in claim 3, characterized in that, The second positioning post is a stud and is mounted on the surface of the fixed base plate via a second positioning seat. The second positioning post is threadedly engaged with the second positioning seat and remains parallel to the fixed base plate. The screw head of the second positioning post is located on the outside of the second positioning seat.

5. The machining fixture for the rear gearbox housing as described in claim 1, characterized in that, The upper pressure plate has an oblong hole, and a guide stud that mates with the oblong hole is vertically connected to the fixed base plate. An adjusting nut is installed on the top of the guide stud away from the fixed base plate. A rear support column is also vertically connected to the fixed base plate. The lower support structure, the guide stud, and the rear support column are located in the same straight line direction directly opposite the clearance hole.

6. The machining fixture for the rear gearbox housing as described in claim 5, characterized in that, The clamping mechanism has four parts, which are distributed around the clearance hole. After the rear housing is placed in place, two of the clamping mechanisms are facing the first bearing mounting hole and two of the clamping mechanisms are facing the second bearing mounting hole.

7. The machining fixture for the rear gearbox housing as described in claim 1, characterized in that, It also includes a mounting plate, which is vertically connected to one end of the fixed base plate. The fixed base plate has at least two triangular reinforcing plates vertically connected to its side opposite to the clamping mechanism, and the other right-angled side of the triangular reinforcing plate is vertically connected to the mounting plate.

8. The machining fixture for the rear gearbox housing as described in claim 7, characterized in that, The triangular reinforcing plate has a relief hole, and there are two triangular reinforcing plates, which are symmetrically distributed on both sides of the relief hole.

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