A machining fixture for small-diameter, oblique, deep oil holes

Abstract

The present invention relates to a processing fixture for small-diameter oblique deep oil holes, comprising an integrally formed T-shaped bracket body, a connecting rod small end limit mechanism and a connecting rod large end limit mechanism detachably connected to the T-shaped bracket body, wherein the connecting rod small end limit mechanism and the connecting rod large end limit mechanism are symmetrically distributed on the T-shaped bracket body, and the connecting rod small end limit mechanism comprises a circular ring limit block detachably connected to the side wall of the T-shaped bracket body, a hollow limit column connected to the middle of the circular ring limit block, a first screw rod penetrating the hollow limit column and the side wall of the T-shaped bracket body, and a plurality of first nuts arranged at one end of the first screw rod. The processing fixture for small-diameter oblique deep oil holes has a relatively convenient clamping process and is relatively convenient to disassemble, and is suitable for the horizontal processing process of the small-diameter oblique oil holes at the small end of the connecting rod, and can overcome the situation that deviation and vibration caused by uneven clamping force are easily generated during the deep hole processing process, thereby effectively avoiding the situation that the oil hole is rough or the drill bit is chipped and broken.

Description

Technical Field

[0001] The invention belongs to the field of processing and manufacturing marine diesel engine parts, and in particular relates to a processing fixture for small-diameter oblique deep oil holes. Background Art

[0002] The connecting rod is one of the most important transmission parts in a diesel engine. It is a component that connects the piston and the crankshaft. When the connecting rod moves, the lubrication requirements of the component are very strict. The flow rate will directly affect the use effect and life of the connecting rod, so some high-speed connecting rods are designed with special small-diameter oil holes.

[0003] The processing of the small-diameter, slender and inclined oil hole at the small end of the connecting rod designed above must be done with a special processing fixture. It is necessary to ensure that the connecting rod is correctly positioned during the processing, the drill hole has a high straightness, and penetrates the main oil hole to achieve the desired effect. It is also necessary to overcome the vibration caused by uneven clamping force, which may lead to rough oil holes or chipping and breakage of the drill bit.

[0004] However, there are no corresponding suitable products on the market. Therefore, it is necessary to design a set of fixtures specifically for horizontal drilling of such inclined holes in order to meet the requirements of the drawing design and ultimately ensure that the connecting rod meets its functional requirements. Summary of the invention

[0005] The purpose of the present invention is to provide a machining fixture for small-diameter inclined deep oil holes with a simple structure and reasonable design in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A processing fixture for small-diameter oblique deep oil holes comprises an integrally formed T-shaped bracket body, a connecting rod small end limiting mechanism and a connecting rod large end limiting mechanism detachably connected to the T-shaped bracket body, wherein the connecting rod small end limiting mechanism and the connecting rod large end limiting mechanism are symmetrically distributed on the T-shaped bracket body.

[0008] As a further optimization scheme of the present invention, the limiting mechanism of the small end of the connecting rod includes an annular limiting block detachably connected to the side wall of the T-shaped bracket body, a hollow limiting column connected to the middle part of the annular limiting block, a first screw rod passing through the hollow limiting column and the side wall of the T-shaped bracket body, a plurality of first nuts arranged at one end of the first screw rod, a plurality of limiting clamping plates detachably connected to one end of the first screw rod, a limiting circular plate and a second nut arranged at the other end of the first screw rod, and a lower support rod detachably connected to the bottom end of the T-shaped bracket body, and the first nut is used to drive the limiting clamping plate to move along the axial direction of the first screw rod.

[0009] As a further optimization solution of the present invention, the limiting clamping plate is provided with a clamping groove matched with the first screw rod, and the width of the clamping groove is smaller than the outer diameter of the first nut.

[0010] As a further optimization scheme of the present invention, the connecting rod big end limiting mechanism includes a plurality of square limiting blocks and a second screw rod detachably connected to the side wall of the T-shaped bracket body, a limiting clamp and a third nut connected to one end of the second screw rod, and a bottom support block detachably connected to the bottom end of the T-shaped bracket body, and the second screw rod is located between the plurality of square limiting blocks.

[0011] As a further optimization solution of the present invention, the square limiting block, the bottom supporting block and the annular limiting block are all connected to the T-shaped bracket body by screws.

[0012] As a further optimization solution of the present invention, the bottom end of the T-shaped bracket body is detachably connected with a plurality of support bolts, and the plurality of support bolts are symmetrically arranged at positions near the edge of the bottom end of the T-shaped bracket body.

[0013] As a further optimization scheme of the present invention, a storage mechanism is provided near the lower end of the side wall of the T-shaped bracket body, and the storage mechanism is used to store the limiting card plate. A card block is movably connected to the side wall of the T-shaped bracket body, and the card block is used to limit the storage mechanism.

[0014] As a further optimization scheme of the present invention, the storage mechanism includes a accommodating groove arranged in the T-shaped bracket body, a storage member arranged in the accommodating groove, a rotating shaft connected to the storage member, a storage groove arranged on the storage member, a bottom plate arranged in the storage groove and a pull rod connected to the middle position of the bottom plate, and the storage groove is used to accommodate a limit card.

[0015] As a further optimization scheme of the present invention, the diameter of the bottom plate is smaller than the diameter of the storage groove, an axial hole matching the rotating shaft is provided on the inner wall of the storage groove, and the upper end surface of the pull rod is flush with the upper end surface of the storage piece.

[0016] The beneficial effects of the present invention are:

[0017] 1) When clamping the connecting rod, the present invention conveniently fixes the two ends of the connecting rod respectively through the connecting rod small end limit mechanism and the connecting rod large end limit mechanism. When limiting the small end of the connecting rod, the small end of the connecting rod is inserted along the first screw rod, the inner wall of the small end hole of the connecting rod contacts the hollow limit column, and the side wall of the small end of the connecting rod contacts the annular limit block. Then, the limit clamping plate is inserted into the first screw rod, and the first nut is rotated to drive the limit clamping plate to close and contact and press the small end of the connecting rod, so that the small end of the connecting rod can be limited. When positioning the big end of the connecting rod, insert the big end of the connecting rod along the second screw rod, so that one side wall of the big end of the connecting rod contacts the square limit block, and then install the limit clamping plate and the third nut on the second screw rod, and drive the limit clamping plate to move by rotating the third nut, and finally limit the big end of the connecting rod by the limit clamping plate and the square limit block. The whole limiting process is relatively convenient and has a good limiting effect, which can effectively overcome the vibration caused by uneven clamping force, thereby causing the oil hole to be rough or the drill bit to break or fracture.

[0018] 2) The present invention adds a storage mechanism on the side wall of the T-shaped bracket body. Since the limiting card plate used for clamping the connecting rod can be directly removed from the second screw rod, when the limiting card plate is not applicable, the storage mechanism can be screwed out and the limiting card plate can be stored in the storage mechanism without occupying other storage space and is easy to operate. When in use, the card block is rotated to disengage it from the storage piece. At this time, the storage piece is no longer limited and can be rotated around the rotating shaft at any angle. After the storage piece is screwed out of the accommodating groove, the limiting card plate placed on the bottom plate can be taken out by pulling out the pull rod, which is convenient for use.

[0019] 3) The present invention has a simple structure, high stability, reasonable design and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a top view of the present invention;

[0022] Figure 3 is a rear view of the present invention;

[0023] Figure 4 This is a schematic diagram of the working state of the clamp of the present invention for clamping a connecting rod;

[0024] Figure 5 It is a structural schematic diagram of the storage mechanism of the present invention;

[0025] Figure 6 It is a cross-sectional view of the storage mechanism of the present invention.

[0026] In the figure: 1, T-shaped bracket body; 201, circular limit block; 2010, hollow limit column; 202, first screw; 203, first nut; 204, limit clamping plate; 205, limit circular plate; 206, second nut; 207, lower support rod; 301, square limit block; 302, second screw; 303, limit clamping plate; 304, third nut; 305, bottom support block; 4, support bolt; 501, storage piece; 502, clamping block; 503, storage slot; 504, bottom plate; 505, pull rod; 506, rotating shaft. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0028] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation on the present invention; in the description of the present invention, unless otherwise specified, "multiple" and "several" mean two or more.

[0029] Example 1

[0030] like Figure 1-3 As shown, a processing fixture for a small-diameter oblique deep oil hole comprises an integrally formed T-shaped bracket body 1, a connecting rod small end limit mechanism and a connecting rod large end limit mechanism detachably connected to the T-shaped bracket body 1, and the connecting rod small end limit mechanism and the connecting rod large end limit mechanism are symmetrically distributed on the T-shaped bracket body 1. The connecting rod small end limit mechanism and the connecting rod large end limit mechanism are respectively located near the two ends of the T-shaped bracket body 1.

[0031] The limiting mechanism of the small end of the connecting rod includes a circular limiting block 201 detachably connected to the side wall of the T-shaped bracket body 1, a hollow limiting column 2010 connected to the middle part of the circular limiting block 201, a first screw 202 passing through the hollow limiting column 2010 and the side wall of the T-shaped bracket body 1, a plurality of first nuts 203 arranged at one end of the first screw 202, a plurality of limiting clamping plates 204 detachably connected to one end of the first screw 202, a limiting circular plate 205 and a second nut 206 arranged at the other end of the first screw 202, and a lower support rod 207 detachably connected to the bottom end of the T-shaped bracket body 1, and the first nut 203 is used to drive the limiting clamping plate 204 to move along the axial direction of the first screw 202.

[0032] The limiting clamping plate 204 is provided with a clamping groove matched with the first screw rod 202, and the width of the clamping groove is smaller than the outer diameter of the first nut 203. After the small end of the connecting rod is installed on the first screw rod 202, the limiting clamping plate 204 is clamped on the first screw rod 202 along the clamping groove, and ensures that it is located between the first nut 203 and the small end of the connecting rod, and then the limiting clamping plate 204 is driven to move by rotating the first nut 203 and make close contact with the small end of the connecting rod, so as to achieve the effect of limiting and clamping the small end of the connecting rod.

[0033] The connecting rod large end limiting mechanism comprises a plurality of square limiting blocks 301 and a second screw 302 detachably connected to the side wall of the T-shaped bracket body 1, a limiting clamp 303 and a third nut 304 connected to one end of the second screw 302, and a bottom support block 305 detachably connected to the bottom end of the T-shaped bracket body 1, and the second screw 302 is located between the plurality of square limiting blocks 301. The bottom support block 305 can prevent the connecting rod large end from moving downward when not clamped, and similarly, the lower support rod 207 is used to support the small end of the connecting rod, and the two are used in conjunction with each other to ensure that the connecting rod is in a stable state when limited.

[0034] The square stopper 301, the bottom support block 305 and the annular stopper 201 are all connected to the T-shaped bracket body 1 by screws and can be replaced according to the specific size of the processing connecting rod, and the application range is relatively wide.

[0035] The bottom end of the T-shaped bracket body 1 is detachably connected with a plurality of support bolts 4 , and the plurality of support bolts 4 are symmetrically arranged at positions near the edge of the bottom end of the T-shaped bracket body 1 .

[0036] like Figure 4As shown, when the connecting rod is clamped, the two ends of the connecting rod are conveniently fixed by the connecting rod small end limiting mechanism and the connecting rod large end limiting mechanism respectively. When limiting the small end of the connecting rod, the small end of the connecting rod is inserted along the first screw 202, the inner wall of the small end hole of the connecting rod contacts the hollow limiting column 2010, and the side wall of the small end of the connecting rod contacts the annular limiting block 201, and then the limiting clamping plate 204 is inserted into the first screw 202, and the first nut 203 is rotated to drive the limiting clamping plate 204 to close and contact and press the small end of the connecting rod, so that the small end of the connecting rod can be limited. When the large end is inserted, the large end of the connecting rod is inserted along the second screw 302, and one side wall of the large end of the connecting rod contacts the square limit block 301, and then the limit clamp 303 and the third nut 304 are installed on the second screw 302, and the limit clamp 303 is driven to move by rotating the third nut 304, and finally the large end of the connecting rod is limited by the limit clamp 303 and the square limit block 301. The whole limiting process is relatively convenient and the limiting effect is good, which can effectively overcome the vibration caused by uneven clamping force, thereby causing the oil hole to be rough or the drill bit to be chipped and broken.

[0037] like Figure 5 and 6 As shown, a storage mechanism is provided near the lower end of the side wall of the T-shaped bracket body 1, and the storage mechanism is used to store the limiting clamping plate 204. A clamping block 502 is movably connected to the side wall of the T-shaped bracket body 1, and the clamping block 502 is used to limit the storage mechanism.

[0038] The storage mechanism includes a receiving groove arranged in the T-shaped bracket body 1, a storage piece 501 arranged in the receiving groove, a rotating shaft 506 connected to the storage piece 501, a storage groove 503 arranged on the storage piece 501, a bottom plate 504 arranged in the storage groove 503 and a pull rod 505 connected to the middle position of the bottom plate 504, and the storage groove 503 is used to store the limit clamping plate 204.

[0039] The diameter of the bottom plate 504 is smaller than that of the receiving groove 503 . An axial hole matching with the rotating shaft 506 is provided on the inner wall of the receiving groove. The upper end surface of the pull rod 505 is flush with the upper end surface of the receiving member 501 .

[0040] When in use, the card block 502 is rotated to disengage it from the storage piece 501. At this time, the storage piece 501 is no longer limited and can be rotated at any angle around the rotating shaft 506. When the storage piece 501 is screwed out of the receiving slot, the pull rod 505 can be pulled out and the limiting card plate 204 placed on the bottom plate 504 can be taken out for easy use. After the limiting card plate 204 is taken out, the pull rod 505 and the bottom plate 504 are put back into the receiving slot. By the same principle, when the limiting card plate 204 is not in use, it is put back into the receiving slot 503 and the storage piece 501 is screwed back into the receiving slot, and then the storage piece 501 is limited by the card block 502. The whole process is relatively convenient and the storage is stable.

[0041] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A small-diameter oblique deep oil hole processing fixture, used for clamping a connecting rod during processing of a small-diameter oblique deep oil hole, characterized in that: The connecting rod comprises a rod body and a connecting rod big end and a connecting rod small end respectively arranged at two ends of the rod body, the connecting rod big end is provided with a connecting rod big end hole, the connecting rod small end is composed of two extension ends connected to the rod body and each of the two extension ends is provided with a connecting rod small end hole; The processing fixture comprises an integrally formed T-shaped bracket body (1), a connecting rod small end limiting mechanism and a connecting rod large end limiting mechanism detachably connected to the T-shaped bracket body (1), wherein the connecting rod small end limiting mechanism and the connecting rod large end limiting mechanism are symmetrically distributed on the T-shaped bracket body (1); The connecting rod small end limit mechanism comprises a circular limit block (201) detachably connected to the side wall of the T-shaped bracket body (1), a hollow limit column (2010) connected to the middle of the circular limit block (201), a first screw (202) passing through the hollow limit column (2010) and the side wall of the T-shaped bracket body (1), two first nuts (203) arranged at one end of the first screw (202), two limit clamping plates (204) detachably connected to one end of the first screw (202), a limit circular plate (205) and a second nut (206) arranged at the other end of the first screw (202), and a lower support rod (207) detachably connected to the bottom end of the T-shaped bracket body (1), wherein the first nut (203) is used to drive the limit clamping plate (204) to move along the axial direction of the first screw (202); The two first nuts (203) are respectively used to press a limiting clamping plate (204) against the relative inner surfaces of the two extension ends to achieve fixed limiting of the small end of the connecting rod; The connecting rod large end limiting mechanism comprises a plurality of square limiting blocks (301) and a second screw (302) detachably connected to the side wall of the T-shaped bracket body (1), a limiting clamp (303) and a third nut (304) connected to one end of the second screw (302), and a bottom supporting block (305) detachably connected to the bottom end of the T-shaped bracket body (1), wherein the second screw (302) is located between the plurality of square limiting blocks (301).

2. A small-diameter oblique deep oil hole machining fixture according to claim 1, characterized in that: The position-limiting clamping plate (204) is provided with a clamping groove that matches the first screw rod (202), and the width of the clamping groove is smaller than the outer diameter of the first nut (203).

3. A small-diameter, oblique, deep oil hole machining fixture according to claim 1, characterized in that: The square limiting block (301), the bottom supporting block (305) and the annular limiting block (201) are all connected to the T-shaped bracket body (1) via screws.

4. A small-diameter oblique deep oil hole machining fixture according to claim 1, characterized in that: The bottom end of the T-shaped bracket body (1) is detachably connected to a plurality of support bolts (4), and the plurality of support bolts (4) are symmetrically arranged at positions close to the edge of the bottom end of the T-shaped bracket body (1).

5. The processing fixture for a small-diameter oblique deep oil hole according to claim 1 is characterized in that: A storage mechanism is provided near the lower end of the side wall of the T-shaped bracket body (1), and the storage mechanism is used to store the limit clamping plate (204). A clamping block (502) is movably connected to the side wall of the T-shaped bracket body (1), and the clamping block (502) is used to limit the storage mechanism.

6. A small-diameter oblique deep oil hole machining fixture according to claim 5, characterized in that: The storage mechanism comprises a storage groove arranged in the T-shaped bracket body (1), a storage member (501) arranged in the storage groove, a rotating shaft (506) connected to the storage member (501), a storage groove (503) arranged on the storage member (501), a bottom plate (504) arranged in the storage groove (503), and a pull rod (505) connected to the middle position of the bottom plate (504), wherein the storage groove (503) is used to store the limit clamping plate (204).

7. A machining fixture for a small-diameter oblique deep oil hole according to claim 6, characterized in that: The diameter of the bottom plate (504) is smaller than the diameter of the receiving groove (503); an axial hole matching the rotating shaft (506) is provided on the inner wall of the receiving groove; and the upper end surface of the pull rod (505) is flush with the upper end surface of the receiving member (501).

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