Clamp for machining tractor gearbox body

Abstract

The utility model relates to the technical field of tractor gearbox processing, in particular to a fixture for processing a tractor gearbox body, which comprises a base, a fixture body, an upper wing plate arranged at the top of the base, two sections of sliding rails symmetrically arranged at the bottom or on the side of the upper wing plate, and a sliding block connected with each section of sliding rail in a sliding manner; the two clamping plates are fixedly connected with the corresponding sliding blocks correspondingly and used for clamping the end faces of the workpieces. The at least two ejector rods are vertically connected to the upper wing plate in a threaded mode and used for abutting against the bottom face of a workpiece; the two-way screw rod transversely penetrates through the web plate of the base and is rotationally connected with the web plate, and two sections of reverse threads of the two-way screw rod are in threaded fit with the corresponding sliding blocks or clamping plates respectively; according to the utility model, the at least two ejector rods and the base form at least three point position supports together, and are matched with the two clamping plates, so that the stability of a workpiece in the machining process is remarkably enhanced, displacement caused by vibration or cutting force is effectively prevented, and the machining precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of tractor gearbox processing technology, and in particular to a fixture for processing tractor gearbox bodies. Background Technology

[0002] Tractor gearboxes typically consist of a lower gearbox and an upper cover. However, when machining the split surfaces (main sealing surfaces, which bear the internal oil pressure and gear vibration, and require high flatness (generally less than 0.05mm)) of the lower gearbox and the upper cover, the bottom of the lower gearbox or the top of the upper cover is usually supported by the top surface of a fixture, and then the front and rear ends are clamped by two symmetrically arranged clamping plates.

[0003] However, the bottom surface of the box and the top surface of the upper box cover are not flat. In particular, the top of the upper box cover only has one point in contact with the top surface of the fixture. The stability of the front and rear end faces is limited by the symmetrically arranged clamping plates, which affects the processing efficiency (slow milling or grinding speed, small amount of milling or grinding per cycle, otherwise the workpiece is easily displaced).

[0004] To address this, we designed a fixture for machining tractor gearbox housings. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses a jig for machining tractor gearbox bodies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A jig for machining a tractor gearbox housing includes:

[0008] The base has an upper wing plate on its top, and two slide rails are symmetrically arranged on the bottom or side of the upper wing plate, with a slider slidably connected on each slide rail.

[0009] The clamping plate has two plates, each fixedly connected to a corresponding slider, for clamping the end face of the workpiece;

[0010] A push rod, having at least two, is vertically screwed to the upper wing plate and is used to press against the bottom surface of the workpiece;

[0011] A bidirectional screw is transversely inserted through the web of the base and rotatably connected to it. The two reverse threads of the bidirectional screw are respectively engaged with the corresponding slider or clamping plate threads. By rotating the bidirectional screw, the slider is driven to move synchronously towards or away from each other along the slide rail.

[0012] Furthermore, both sides of the clamping plate are provided with downwardly extending extensions, the bottom inner side of the extension is fixedly connected to the corresponding slider side, and the extension extends to the lower part of the upper wing plate.

[0013] Furthermore, the surface of the upper wing plate of the base is provided with multiple threaded through holes for mounting the top rod, which are used to adjust the mounting position of the top rod.

[0014] Furthermore, the push rod includes a threaded section and a reduced diameter section. The outer end of the reduced diameter section is provided with a ball head, which fits against the bottom surface of the workpiece to be clamped, so as to meet the clamping requirements of non-planar workpieces.

[0015] Furthermore, the push rod includes a threaded section and a reduced diameter section, the outer end of which is universally hinged to the pressure head, and the pressure head adapts to the tilt angle of the bottom surface of the workpiece.

[0016] Furthermore, the end of the bidirectional screw is provided with a handle or a drive motor for manually or automatically adjusting the position of the clamping plate.

[0017] Furthermore, the lower wing plate of the base is provided with positioning holes, which are used to fix the fixture to the machine tool worktable by bolts.

[0018] Furthermore, both sides of the clamping plate are provided with vertically inward extension plates, and the inner end of the extension plate is provided with a push rod for laterally pressing the workpiece.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. By setting at least two push rods and the base to form at least three support points, and with the help of two clamping plates, the stability of the workpiece during the processing is significantly enhanced, effectively preventing displacement caused by vibration or cutting force, and improving processing accuracy;

[0021] 2. The push rod end adopts a ball head or universal hinged pressure head design, which can adapt to the non-planar or inclined angle of the workpiece bottom surface, expand the application range of the fixture, and meet the diverse clamping needs of tractor gearboxes;

[0022] 3. The base upper wing plate is equipped with multiple threaded through holes and an extension plate, which supports free adjustment of the push rod position, realizes rapid adjustment of the clamping width position, significantly shortens the clamping time, and improves processing efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first structure of this utility model;

[0024] Figure 2 for Figure 1 The main view;

[0025] Figure 3 for Figure 1 Top view;

[0026] Figure 4 for Figure 1 Side view;

[0027] Figure 5 This is a schematic diagram of the second structure of this utility model;

[0028] Figure 6 This is a schematic diagram of the first structure of the push rod in this utility model;

[0029] Figure 7 This is a schematic diagram of the second structure of the push rod in this utility model.

[0030] In the diagram: 1. Base; 11. Upper wing plate; 12. Web plate; 13. Lower wing plate; 14. Threaded through hole; 15. Positioning hole; 2. Slide rail; 21. Slider; 3. Clamping plate; 31. Extension; 4. Push rod; 41. Threaded section; 42. Reduced diameter section; 43. Ball head; 44. Pressing head; 5. Double-acting screw; 6. Extension plate. Detailed Implementation

[0031] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0032] Example 1, in conjunction with Appendix Figure 1-4 A jig for machining a tractor gearbox body, comprising:

[0033] The base 1 has an upper wing plate 11, a web plate 12, and a lower wing plate 13. Specifically, the structure of the base 1 can be I-shaped or U-shaped. Two slide rails 2 are symmetrically arranged on the bottom or side of the upper wing plate 11, and a slider 21 is slidably connected to each slide rail 2.

[0034] In one possible implementation, the base 1 has only one slide rail 2 at each end, which is located in the middle of the bottom surface of the upper wing plate 11.

[0035] In one possible implementation, the base 1 has two slide rails 2 at each end, and the two slide rails 2 are respectively disposed on the side wall surface of the upper wing plate 11.

[0036] As needed, the surface of the upper wing plate 11 of the base 1 is provided with multiple threaded through holes 14 for mounting the push rod 4, that is, to adjust the mounting position of the push rod 4 according to the shape of the bottom surface of the workpiece.

[0037] Furthermore, the lower wing plate 13 of the base 1 is provided with positioning holes 15, which are used to fix the fixture to the machine tool worktable by bolts.

[0038] Two clamping plates 3 are fixedly connected to the corresponding sliders 21 and are used to clamp the end face of the workpiece.

[0039] Furthermore, when the slide rail 2 is located in the middle of the bottom surface of the upper wing plate 11, both sides of the clamping plate 3 are provided with downwardly extending extensions 31. The inner bottom of the extension 31 is fixedly connected to the side of the corresponding slider 21, and the extension 31 extends to the bottom of the upper wing plate 11.

[0040] At least two push rods 4 are vertically screwed to the upper flange 11 to press against the bottom surface of the workpiece; that is, the bottom surface of the workpiece is supported by at least three points, including at least two push rods 4 and at least one point on the base 1, to ensure stability during processing.

[0041] Furthermore, when there are two push rods 4, the three support points on the bottom surface of the workpiece have a certain probability of being located on the same straight line or near a straight line. Therefore, preferably, the push rods 4 are provided with at least three that are not on the same straight line.

[0042] In one possible implementation, combined with the appendix Figure 6 The push rod 4 includes a threaded section 41 and a reduced diameter section 42. The outer end of the reduced diameter section 42 is provided with a ball head 43, which fits against the bottom surface of the workpiece to be clamped, so as to meet the clamping requirements of non-planar workpieces.

[0043] The bidirectional screw 5 passes through the web plate 12 of the base 1 laterally and is rotatably connected to it. The two reverse threads of the bidirectional screw 5 are respectively threaded with the corresponding slider 21 or clamping plate 3. By rotating the bidirectional screw 5, the slider 21 is driven to move synchronously towards or away from each other along the slide rail 2.

[0044] As needed, the end of the bidirectional screw 5 is equipped with a handle or drive motor (not shown in the figure) for manually or automatically adjusting the position of the clamp 3.

[0045] Work process: Place the tractor gearbox body, either the lower housing or the upper cover, on the upper wing plate 11 of the base 1; rotate the bidirectional screw 5 to drive the clamping plate 3 to move in opposite directions along the slide rail 2, clamping the left and right end faces of the workpiece; adjust the position of the push rod 4 according to the shape of the bottom surface of the workpiece, and rotate the push rod 4 so that the ball head 43 fits against the bottom surface of the workpiece.

[0046] It should be noted that during the rotation of the top rod 4, it is necessary to prevent the workpiece from being lifted and affecting the machining reference.

[0047] Example 2, in conjunction with Appendix Figure 5 A jig for processing a tractor gearbox body, based on embodiment one: both sides of the clamping plate 3 are provided with vertically inward extension plates 6, and the inner end of the extension plate 6 is provided with a push rod 4 for laterally pressing the workpiece; that is, the front and rear sides of the workpiece are clamped and fixed by the push rod 4 and the extension plate 6.

[0048] The difference from Example 1 is that: in conjunction with Appendix Figure 7 The push rod 4 includes a threaded section 41 and a reduced diameter section 42. The outer end of the reduced diameter section 42 is universally hinged to the pressure head 44, and the pressure head 42 adapts to the tilt angle of the bottom surface of the workpiece.

[0049] Work process: Place the tractor gearbox body, either the lower housing or the upper cover, on the upper wing plate 11 of the base 1; rotate the double-acting screw 5 to drive the clamping plates 3 to move in opposite directions along the slide rail 2, clamping the left and right end faces of the workpiece; adjust the position of the push rod 4 on the upper wing plate 11 according to the shape of the bottom surface of the workpiece, and rotate the push rod 4 to make the pressing head 44 fit against the bottom surface of the workpiece; rotate the push rod 4 on the extension plate 6 to make the pressing head 44 fit against the front or rear face of the workpiece.

[0050] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A fixture for machining a tractor gearbox body, characterized in that: include: The base (1) has an upper wing plate (11) on its top. Two slide rails (2) are symmetrically arranged on the bottom or side of the upper wing plate (11). Each slide rail (2) is slidably connected to a slider (21). Clamping plate (3), which has two, is fixedly connected to the corresponding slider (21) and is used to clamp the end face of the workpiece; A push rod (4), having at least two, is vertically screwed to the upper wing plate (11) for pressing against the bottom surface of the workpiece; The bidirectional screw (5) passes through the web plate (12) of the base (1) laterally and is rotatably connected to it. The two reverse threads of the bidirectional screw (5) are respectively threaded with the corresponding slider (21) or clamp (3). By rotating the bidirectional screw (5), the slider (21) is driven to move synchronously towards or away from each other along the slide rail (2).

2. The jig for machining a tractor gearbox body according to claim 1, characterized in that: Both sides of the clamp (3) are provided with downwardly extending extensions (31), the bottom inner side of the extension (31) is fixedly connected to the side of the corresponding slider (21), and the extension (31) extends to the bottom of the upper wing plate (11).

3. The jig for machining a tractor gearbox body according to claim 1, characterized in that: The upper wing plate (11) of the base (1) is provided with a plurality of threaded through holes (14) for mounting the top rod (4) and for adjusting the mounting position of the top rod (4).

4. The jig for machining a tractor gearbox body according to claim 1, characterized in that: The push rod (4) includes a threaded section (41) and a reduced diameter section (42). The outer end of the reduced diameter section (42) is provided with a ball head (43). The ball head (43) fits against the bottom surface of the workpiece to be clamped in order to meet the clamping requirements of non-planar workpieces.

5. A jig for machining a tractor gearbox body according to claim 1, characterized in that: The push rod (4) includes a threaded section (41) and a reduced diameter section (42). The outer end of the reduced diameter section (42) is universally hinged to the pressure head (44), and the pressure head (44) adapts to the tilt angle of the bottom surface of the workpiece.

6. A jig for machining a tractor gearbox body according to claim 1, characterized in that: The end of the bidirectional screw (5) is provided with a handle or drive motor for manually or automatically adjusting the position of the clamp (3).

7. A jig for machining a tractor gearbox body according to claim 1, characterized in that: The lower wing plate (13) of the base (1) is provided with a positioning hole (15), which is used to fix the fixture to the machine tool worktable by bolts.

8. A jig for machining a tractor gearbox body according to claim 1, characterized in that: Both sides of the clamping plate (3) are provided with vertically inward extension plates (6), and the inner end of the extension plate (6) is provided with a push rod (4) for laterally pressing the workpiece.

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