A drilling fixture for inclined oil holes at the bottom of a hydraulic cylinder

Abstract

A drilling fixture for an inclined oil hole at the bottom of a hydraulic cylinder comprises a guiding positioning mechanism and a sliding locking mechanism mounted on a bottom plate; the guiding positioning mechanism comprises a mounting plate standing on the bottom plate, a positioning plate vertically mounted on the upper end of the mounting plate, the right side surface of the mounting plate is a step structure, the step structure comprises a step part which is a vertical surface, and a step part which is an inclined surface, the inclination angle of the inclined surface of the step part is the same as the angle between the inclined oil hole at the bottom of the hydraulic cylinder and the vertical direction, the positioning plate is mounted on the right side surface of the step part, the lower end surface of the positioning plate is an inclined surface one, the angle between the inclined surface one and the horizontal plane is complementary to the angle between the inclined oil hole at the bottom of the hydraulic cylinder and the horizontal plane, and a positioning hole is provided on the positioning plate; the sliding locking mechanism comprises two mutually parallel guide rails arranged on the bottom plate, a slider slidably connected to the guide rails, and a locking mechanism, the upper plane of the slider is an inclined surface two which is parallel to the lower end surface of the positioning plate, and the upper plane of the slider is provided with a V-shaped groove along the central axis; the drilling processing efficiency is improved by at least 20%.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, in particular to a drilling fixture for drilling an oblique oil hole at the bottom of a hydraulic cylinder. Background Art

[0002] As a conventional cutting method, drilling is widely used in hole processing of various workpieces. Conventional processing equipment such as bench drills and radial drilling machines mainly use the vertical spindle lifting drilling and cutting method, which is relatively easy to achieve the processing of holes perpendicular to the part reference plane. However, in product design, there are often holes that are not perpendicular to the reference plane and are inclined at an angle.

[0003] The processing of inclined holes is a relatively difficult operation process, which involves many issues such as the clamping angle adjustment of the workpiece and the positioning offset of the drill bit. The traditional processing method is to use flat-nose pliers to adjust a certain angle, or to use a machining center and use a center drill, countersink, and drill bit to perform step-by-step cutting processing. However, whether it is adjusting the angle of flat-nose pliers, clamping and aligning the machining center, or frequently switching the machining tools, it will take a considerable amount of time, and the offset of the drill bit cannot be effectively controlled, which is not suitable for the processing of high-precision or batch products. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the above-mentioned inclined hole processing, and to provide an inclined oil hole drilling fixture for workpieces containing inclined oil holes such as the bottom of a hydraulic cylinder, which can be accurately positioned and clamped, effectively control the processing accuracy and quality, has a simple structure, is easy to operate, and can be quickly replaced.

[0005] A hydraulic cylinder bottom inclined oil hole drilling fixture, comprising a guide positioning mechanism and a sliding locking mechanism which are sequentially mounted on a bottom plate from left to right;

[0006] The guide positioning mechanism comprises a mounting plate standing on the bottom plate, a positioning plate vertically mounted on the upper end of the mounting plate, the right side surface of the mounting plate is a step structure, the step structure comprises a step part which is a vertical surface, and a step part which is an inclined surface, the inclination angle of the inclined surface of the step part is the same as the angle between the inclined oil hole at the bottom of the hydraulic cylinder and the vertical direction, the positioning plate is mounted on the right side surface of the step part, the lower end surface of the positioning plate is an inclined surface 1, the angle between the inclined surface 1 and the horizontal plane is complementary to the angle between the inclined oil hole at the bottom of the hydraulic cylinder and the horizontal plane, and the positioning plate is provided with a positioning hole for locating the lowering position of the tool;

[0007] The sliding locking mechanism includes two parallel guide rails arranged on the base plate, a slider slidably connected to the guide rails for supporting the bottom of the hydraulic cylinder, and a locking mechanism for locking the slider. The upper plane of the slider is an inclined plane parallel to the lower end surface of the positioning plate, and a V-shaped groove is provided on the upper plane of the slider along the center axis.

[0008] A drill sleeve is installed in the positioning hole on the positioning plate.

[0009] The locking mechanism includes a guide block fixedly mounted on the bottom plate, the guide block has a threaded hole in the transverse direction that matches the screw, the screw is installed in the threaded hole, the top of the screw is against the slide block to prevent the bottom of the hydraulic cylinder from moving, and one end of the screw is equipped with a hand wheel.

[0010] The bottom plate is provided with two parallel grooves 2 in the transverse direction that match the structural dimensions of the bottom of the two guide rails, and corresponding grooves 2 and more than two screw a mounting holes are provided at corresponding positions of the bottom of the guide rails. The two guide rails are fixedly connected to the bottom plate by screws a installed in the screw a mounting holes.

[0011] More than one positioning pin a mounting hole is opened at the corresponding position of the groove 2 and the bottom of the guide rail.

[0012] The bottom plate is longitudinally provided with a groove 1 which matches the structural dimensions of the bottom of the mounting plate. Two or more screw c mounting holes are provided at corresponding positions of the groove 1 and the bottom of the mounting plate. The mounting plate and the bottom plate are fixedly connected by screws c installed in the screw c mounting holes.

[0013] The bottom of the mounting plate is provided with more than one positioning pin c, and the groove 1 is correspondingly provided with a pin hole c matching the positioning pin c.

[0014] Two screw b mounting holes are opened at relative positions of the mounting plate and the positioning plate, and the mounting plate and the positioning plate are fixedly connected by screws b installed in the screw b mounting holes.

[0015] The positioning plate is provided with more than one positioning pin b, and the mounting plate is correspondingly provided with a pin hole b matching the positioning pin b.

[0016] Compared with the prior art, this patent can accurately locate the processing angle of the inclined oil hole at the bottom of the hydraulic cylinder through the angled bevel of the positioning plate and the slider. The positioning plate is equipped with a guide drill sleeve for drilling, which can accurately locate the drilling position and avoid positioning deviation during the drill bit processing. A V-shaped groove is provided on the angled bevel of the slider. The two V-shaped planes of the V-shaped groove and the angled bevel of the positioning plate form a clamping and positioning mechanism for the bottom of the hydraulic cylinder. This patent has a simple structure and is easy to operate. It can quickly realize the clamping, positioning and disassembly of the bottom of the hydraulic cylinder. Compared with the existing traditional processing methods, the drilling processing efficiency of this patent is improved by at least 20%. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 is a schematic diagram of the structure of the sliding locking mechanism;

[0019] Figure 3This is a schematic diagram of the guiding and positioning mechanism structure. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the guiding and positioning mechanism structure. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the structure after machining the inclined oil hole A at the bottom of the hydraulic cylinder and clamping and locking;

[0022] Figure 6 This is a schematic diagram of the structure after machining the inclined oil hole B at the bottom of the hydraulic cylinder and clamping and locking;

[0023] Figure 7 This is a schematic diagram of the hydraulic cylinder bottom structure Figure 1 ;

[0024] Figure 8 This is a schematic diagram of the hydraulic cylinder bottom structure Figure 2 ;

[0025] Fig. 9 1. It is a schematic diagram of the structure of the positioning plate assembly;

[0026] Fig.10 It is a schematic diagram of the slider structure;

[0027] In the figure, 1, positioning plate, 2, drill sleeve, 3, slider, 4, screw, 5, guide block, 6, handwheel, 7, base plate, 8, mounting plate, 9, guide rail, 10, hydraulic cylinder bottom, 11, positioning pin a, 12, screw a, 13, positioning pin b, 14, screw b, 15, positioning pin c, 16, screw c. DETAILED DESCRIPTION

[0028] Figure 1The present invention includes a guiding and positioning mechanism and a sliding locking mechanism. The guiding and positioning mechanism includes a positioning plate 1. The drill sleeve 2 is installed in the positioning hole of the positioning plate 1 to guide the drilling tool. The positioning plate 1 is fixed on the mounting plate 8. The mounting plate 8 is fixed on the bottom plate 7 to determine the precise position of the inclined oil hole for processing. The right side of the mounting plate 8 is a step structure. The step structure includes a step part that is a vertical surface and a step part that is an inclined surface. The inclination angle of the inclined surface of the step part is the same as the angle between the inclined oil hole of the hydraulic cylinder bottom 10 and the vertical direction. The positioning plate 1 is installed on the right side of the step part. The lower end surface of the positioning plate 1 is an inclined surface. The angle between the inclined plane 1 and the horizontal plane and the angle between the inclined oil hole 10 at the bottom of the hydraulic cylinder and the horizontal plane are complementary; the sliding locking mechanism includes a slider 3, a locking mechanism for locking the slider 3, the locking mechanism includes a screw 4 and a guide block 5, the screw 4 and the guide block 5 are connected by a trapezoidal thread, the hand wheel 6 is fixed to the tail end of the screw 4, and the screw 4 is driven to rotate synchronously by rotating the hand wheel 6, driving the slider 3 to reciprocate, and two parallel guide rails 9 are fixed on the bottom plate 7 to guide the reciprocating motion of the slider 3. The upper plane of the slider 3 is an inclined plane 2 parallel to the lower end surface of the positioning plate 1, and a V-shaped groove is provided on the upper plane of the slider 3 along the center axis.

[0029] Figure 2 In the figure, the two guide rails 9 are fastened to the base plate 7 by two positioning pins a11 and four screws a12 respectively, and the guide block 5 is also fixed to the base plate 7 by two screws.

[0030] Figure 3 , Figure 4 In the figure, the drill sleeve 2 is installed in the positioning hole of the positioning plate 1, and the positioning plate 1 is fixed to the mounting plate 8 by two positioning pins b13 and two screws b14. The mounting plate 8 is fixed to the bottom plate 7 by two positioning pins c15 and three screws c16 to guide and locate the inclined oil hole processing position.

[0031] Figure 5 , Figure 6 In the process, the hydraulic cylinder bottom 10 is installed to the processing position, the outer cylindrical surface of the hydraulic cylinder bottom 10 contacts the groove surface of the V-shaped groove on the slider 3, and the side surface of the hydraulic cylinder bottom 10 contacts the inclined surface of the mounting plate 8. By turning the hand wheel 6, the screw 4 is driven to rotate synchronously, and the movable slider 3 is pushed to slide to the left, and the hydraulic cylinder bottom 10 is gradually raised. After the upper plane of the hydraulic cylinder bottom 10 is completely in contact with the inclined surface of the positioning plate 1, a sufficiently large clamping force is continued to be applied to the slider 3 by turning the hand wheel 6, and the hand wheel 6 is released. The self-locking performance of the trapezoidal thread is used to realize the locking of the hydraulic cylinder bottom 10. Figure 5 This is the clamping state diagram for machining the inclined oil hole A at the bottom of the hydraulic cylinder; Figure 6 This is a diagram of the clamping state for machining the inclined oil hole B at the bottom of the hydraulic cylinder.

[0032] Figure 7 , Figure 8In the structural diagram of the hydraulic cylinder bottom 10, the two inclined oil holes (A, B) of the hydraulic cylinder bottom 10 are inclined to both ends respectively, and the two inclined oil holes (A, B) are located in the center plane of the workpiece, and the two inclined oil holes (A, B) are centrally symmetrical along the two inclined oil holes (A, B). The processing process is as follows Figure 5 , 6 As shown in the figure, turn it over and clamp it, and process two inclined oil holes respectively.

[0033] Fig. 9 In the embodiment, the drill sleeve 2 is installed in the positioning hole of the positioning plate 1 to guide the drill bit, and the inclined surface of the positioning plate 1 plays the role of angular positioning of the inclined oil hole.

[0034] Fig.10 In the process, the groove surface of the V-shaped groove on the slider 3 is in complete contact with the outer circle of the hydraulic cylinder bottom 10 to lock the workpiece.

Claims

1. A drilling fixture for inclined oil holes at the bottom of a hydraulic cylinder, characterized in that: It includes a guide positioning mechanism and a sliding locking mechanism which are sequentially mounted on the bottom plate (7) from left to right; The guide positioning mechanism comprises a mounting plate (8) standing on the bottom plate (7), and a positioning plate (1) vertically mounted on the upper end of the mounting plate (8); the right side surface of the mounting plate (8) is a step structure, the step structure comprises a step part which is a vertical surface, and a step part which is an inclined surface; the inclination angle of the inclined surface of the step part is the same as the angle between the inclined oil hole of the bottom of the hydraulic cylinder (10) and the vertical direction; the positioning plate (1) is mounted on the right side surface of the step part; the lower end surface of the positioning plate (1) is an inclined surface 1; the angle between the inclined surface 1 and the horizontal plane is complementary to the angle between the inclined oil hole of the bottom of the hydraulic cylinder (10) and the horizontal plane; and the positioning plate (1) is provided with a positioning hole for positioning the lowering position of the tool; The sliding locking mechanism comprises two mutually parallel guide rails (9) arranged on the bottom plate (7), a slider (3) slidably connected to the guide rails (9) for supporting the bottom of the hydraulic cylinder (10), and a locking mechanism for locking the slider (3), wherein the upper plane of the slider (3) is an inclined plane parallel to the lower end surface of the positioning plate (1), and the upper plane of the slider (3) is provided with a V-shaped groove along the central axis; The locking mechanism comprises a guide block (5) fixedly mounted on a bottom plate (7), the guide block (5) being provided with a threaded hole in the transverse direction and matching with the screw rod (4), the screw rod (4) being installed in the threaded hole with the top abutting against the slide block (3) to prevent the bottom (10) of the hydraulic cylinder from moving, and a hand wheel (6) being installed at one end of the screw rod (4); The hydraulic cylinder bottom (10) is installed at the processing position, the outer cylindrical surface of the hydraulic cylinder bottom (10) contacts the groove surface of the V-shaped groove on the slider (3), and the side surface of the hydraulic cylinder bottom (10) contacts the inclined surface of the mounting plate (8). By turning the hand wheel (6), the screw rod (4) is driven to rotate synchronously, and the slider (3) is pushed to slide to the left, and the hydraulic cylinder bottom (10) is gradually raised. After the upper plane of the hydraulic cylinder bottom (10) is completely in contact with the inclined surface of the positioning plate (1), the hand wheel (6) is turned to continue to apply a sufficiently large clamping force to the slider (3), and the hand wheel (6) is released. The self-locking performance of the trapezoidal thread is used to achieve the locking of the hydraulic cylinder bottom (10).

2. The hydraulic cylinder bottom inclined oil hole drilling fixture according to claim 1, characterized in that: A drill sleeve (2) is installed in the positioning hole on the positioning plate (1).

3. The hydraulic cylinder bottom inclined oil hole drilling fixture according to claim 1, characterized in that: The bottom plate (7) is provided with two parallel grooves 2 in the transverse direction that match the structural dimensions of the bottoms of the two guide rails (9), and two or more screw a mounting holes are provided at corresponding positions of the corresponding grooves 2 and the bottoms of the guide rails (9). The two guide rails (9) are fixedly connected to the bottom plate (7) by screws a (12) installed in the screw a mounting holes.

4. The hydraulic cylinder bottom inclined oil hole drilling fixture according to claim 3, characterized in that: At the corresponding positions of the groove 2 and the bottom of the guide rail (9), one or more positioning pin a mounting holes are provided.

5. The hydraulic cylinder bottom inclined oil hole drilling fixture according to claim 1, characterized in that: The bottom plate (7) is provided with a groove 1 in the longitudinal direction which matches the structural dimensions of the bottom of the mounting plate (8), and two or more screw c mounting holes are provided at corresponding positions of the groove 1 and the bottom of the mounting plate (8), and the mounting plate (8) and the bottom plate (7) are fixedly connected by screws c (16) installed in the screw c mounting holes.

6. The hydraulic cylinder bottom inclined oil hole drilling fixture according to claim 5, characterized in that: One or more positioning pins c (15) are provided at the bottom of the mounting plate (8), and a pin hole c matching the positioning pin c is correspondingly opened on the groove.

7. The hydraulic cylinder bottom inclined oil hole drilling fixture according to claim 1, characterized in that: Two screw b mounting holes are formed at relative positions of the mounting plate (8) and the positioning plate (1), and the mounting plate (8) and the positioning plate (1) are fixedly connected by screws b (14) installed in the screw b mounting holes.

8. The hydraulic cylinder bottom inclined oil hole drilling fixture according to claim 7, characterized in that: The positioning plate (1) is provided with one or more positioning pins b (13), and the mounting plate (8) is provided with corresponding pin holes b matching the positioning pins b.

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