Fixture for drilling circumferential equally-divided inclined holes

Abstract

The utility model provides a fixture for drilling circumferential equally-divided inclined holes, which relates to the field of fixtures, and comprises a fixture body, the outer end face of the fixture body is in a regular hexagon shape, a containing hole is formed in the fixture body, a distribution sleeve is contained in the containing hole, drill bushings are distributed on the outer end face of the fixture body at equal angles at intervals, and a positioning baffle is detachably arranged on the rear end face of the fixture body. According to the fixture for drilling the circumferential equally-divided inclined holes, aiming at the problem that the inclined holes are formed in the three circumferences of the distribution sleeve at equal angles, conventional machining is difficult, a matched fixture is specially manufactured, and the fixture can be used for drilling the circumferential equally-divided inclined holes. According to the fixture, the distribution sleeve is simple and convenient to mount, the inclined hole machining precision is high, the machining speed can be effectively increased, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution sleeve clamps, in particular to a clamp for drilling circumferentially equally divided inclined holes. Background Art

[0002] VE distribution pump, full name Variable Eccentricity distribution pump, is a mechanical device used to control fuel distribution, widely used in diesel engines. Its main function is to accurately control the injection amount and injection time according to the operating status of the engine to improve the performance and efficiency of the engine.

[0003] The distributor housing of the VE distributor pump is an important component of the VE distributor pump. It is a support for installing the injector and is also a key component of the entire fuel distribution system.

[0004] The main functions of the distribution sleeve are as follows:

[0005] Support the injector: The distribution sleeve is provided with holes for installing the injector, which is used to fix the injector. During the operation of the engine, the injector maintains a precise position in the distribution sleeve to ensure that the injection angle and injection pressure of the injector meet the design requirements.

[0006] Fuel distribution: The distribution sleeve has a fuel channel inside to guide the fuel from the VE distribution pump to each injector. The internal design of the distribution sleeve must ensure the uniformity and accuracy of fuel distribution so that the engine can obtain the best air-fuel ratio under different operating conditions.

[0007] Sealing: The distribution sleeve must have good sealing performance to prevent fuel leakage and external contaminants from entering. Therefore, there are strict requirements for the manufacturing materials and processing technology of the distribution sleeve to ensure its sealing and reliability.

[0008] Compatibility: The design of the distribution sleeve needs to match the VE distribution pump and injector to ensure the compatibility and performance of the entire fuel distribution system. Different engine models may use distribution sleeves of different shapes and sizes, so when replacing the distribution sleeve, you must make sure to choose the model that suits your engine.

[0009] The oblique hole of the distribution sleeve connects the distribution housing and the distribution rotor oil passage, so that sufficient oil is retained in the high-pressure oil chamber to keep the oil chamber pressure constant. The three oblique holes with equal angles on the distribution sleeve are set at an angle to the outer side of the circle and relative to the normal line of the distribution sleeve, which puts high demands on their processing. Conventional processing methods, clamping and processing are difficult, so this case was born. Utility Model Content

[0010] 1. Technical issues to be solved

[0011] In view of the deficiencies in the prior art, the utility model provides a fixture for drilling circumferentially equally divided inclined holes, which solves the problems raised in the above-mentioned background technology.

[0012] (II) Technical solution

[0013] To achieve the above objectives, the utility model is implemented through the following technical solutions: a fixture for drilling inclined holes that divide the circumference equally: comprising a fixture body, the outer end face of the fixture body is a regular hexagon, a receiving hole is provided inside, the receiving hole receives a distribution sleeve, drill sleeves are arranged at equal angles on the outer end face of the fixture body, a positioning baffle is detachably provided on the rear end face of the fixture body, a positioning pin is provided on the inner side of the positioning baffle, and a pressing and fixing mechanism is detachably provided on the front end of the fixture body for pressing and fixing the distribution sleeve.

[0014] Preferably, the positioning baffle is positioned on the front end surface of the clamp body by a cylindrical pin, and then detachably fixed to the front end surface of the clamp body by a set of hexagon socket screws.

[0015] Preferably, the positioning pin is a diamond-shaped positioning pin, and a corresponding positioning hole is provided on the front end surface of the distribution sleeve. When the distribution sleeve is accommodated in the fixture body, the positioning hole is adapted to the diamond-shaped positioning pin.

[0016] Preferably, the drill sleeve is fixed to the fixture body by interference fit.

[0017] Preferably, an inclined block is provided on the outer end surface of the fixture body between adjacent drill sleeves, and the inclined block is connected to the outer end surface of the fixture body through a second cylindrical pin and then fixed by electric welding.

[0018] Preferably, the angle between the drill sleeve and the normal line of the outer end surface of the fixture body is consistent with the angle between the inclined surface of the inclined block and the outer end surface of the fixture body.

[0019] Preferably, the pressing and fixing mechanism includes a pressure plate, a group of two hexagon socket screws, and a screw rod, wherein the bottom end of the group of two hexagon socket screws is arranged on the rear end surface of the clamp body, one end of the pressure plate is hinged to one of the two hexagon socket screws, and the other end is provided with a bayonet, and a movable buckle is on the other two hexagon socket screws, an internal thread is provided in the center of the pressure plate, the screw rod is threadedly connected to the center of the pressure plate, a top plate is provided at the bottom of the screw rod, and a screw head is provided at the head of the screw rod.

[0020] (III) Beneficial effects

[0021] The utility model provides a fixture for drilling circumferentially equally divided inclined holes. It has the following beneficial effects:

[0022] The fixture for drilling circumferentially equally divided inclined holes is specially made to solve the problem that the inclined holes opened at equal angles on three circumferences of the distribution sleeve are difficult to process conventionally. The fixture is simple and convenient to install the distribution sleeve, and the inclined holes are processed with high precision, which can effectively improve the processing speed and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic cross-sectional view of a fixture for drilling circumferentially equally divided oblique holes according to the utility model;

[0024] Figure 2 This is a right view of a fixture for drilling circumferentially equally divided oblique holes according to the utility model;

[0025] Figure 3 This is a left view of a fixture for drilling circumferentially equally divided oblique holes according to the utility model;

[0026] Figure 4 This is a schematic diagram of a fixture for drilling circumferentially equally divided inclined holes when drilling inclined holes;

[0027] Figure 5 The utility model is a schematic diagram of the structure of a pressing and fixing mechanism of a fixture for drilling circumferentially equally divided inclined holes.

[0028] In the figure: 1. positioning baffle; 2. drill sleeve; 3. cylindrical pin 1; 4. bevel block; 5. fixture body; 6. hexagon socket screw 1; 7. diamond positioning pin; 8. cylindrical pin 2; 9. hexagon socket screw 2; 10. pressure plate; 11. distribution sleeve; 12. accommodation hole; 13. screw; 14. bayonet; 15. top plate; 16. screw head. DETAILED DESCRIPTION

[0029] In order to effectively fix the distribution sleeve and open the oblique hole on the distribution sleeve, the embodiment of the utility model provides a fixture for drilling oblique holes in equal parts of the circumference, such as Figure 1-5 As shown, it includes a clamp body 5, the outer end face of the clamp body 5 is a regular hexagon, and an accommodating hole 12 is provided inside. The accommodating hole 12 accommodates the distribution sleeve, and the outer end face of the clamp body 5 is arranged with drill sleeves 2 at equal angles. The rear end face of the clamp body 5 is detachably provided with a positioning baffle 1, and a positioning pin is provided on the inner side of the positioning baffle 1. The front end of the clamp body 5 is detachably provided with a pressing and fixing mechanism for pressing and fixing the distribution sleeve.

[0030] In the above technical solution, regarding the specific connection method of the positioning baffle 1, such as Figure 3 As shown, the positioning baffle 1 is positioned on the front end surface of the clamp body 5 through a cylindrical pin 3, and then detachably fixed on the front end surface of the clamp body 5 through a set of hexagon socket screws 6.

[0031] In the above technical solution, the positioning pin is a diamond-shaped positioning pin 7, and a positioning hole is provided on the front end face of the corresponding distribution sleeve. When the distribution sleeve is accommodated in the fixture body 5, the positioning hole is inserted into the diamond-shaped positioning pin 7 to position the distribution sleeve, mainly for angular positioning to prevent it from rotating.

[0032] like Figure 1 and 2 As shown, the drill sleeve 2 is fixed on the fixture body 5 by interference fit.

[0033] like Figure 1 As shown, an inclined block 4 is provided on the outer end surface of the fixture body 5 between the adjacent drill sleeves 2, and the inclined block 4 is connected to the outer end surface of the fixture body 5 through a cylindrical pin 8, and then fixed by electric welding. Figure 4 As shown, after the distribution sleeve is fixedly placed in the fixture body 5, it is placed on the platform of a drilling machine (not shown in the figure) using the outer end face of the bevel block 4. Since the drill bit on the drilling machine (not shown in the figure) is installed vertically, the bevel block 4 is provided to make the drill sleeve 2 consistent with the direction of the drill bit. Preferably, the angle between the drill sleeve 2 and the normal of the outer end face of the fixture body 5 is consistent with the angle between the bevel of the bevel block 4 and the outer end face of the fixture body 5.

[0034] like Figure 5 As shown, an embodiment of the pressing and fixing mechanism includes a pressing plate 10, a group of hexagon socket screws 29, and a screw 13. The bottom ends of the group of hexagon socket screws 29 are arranged on the rear end surface of the clamp body 5. One end of the pressing plate 10 is hinged on one of the hexagon socket screws 29, and the other end is provided with a bayonet 14, and a movable buckle is on the other hexagon socket screw 29. An internal thread is provided at the center of the pressing plate 10, and the screw 13 is threadedly connected to the center of the pressing plate 10. A top plate 15 is provided at the bottom of the screw 13, and a screw head 16 is provided at the head of the screw 13. The distribution sleeve is fixed by the pressing and fixing mechanism to prevent axial movement.

[0035] Working principle: When the fixture for drilling circumferentially equally divided inclined holes is used, the distribution sleeve is placed into the accommodating hole 12 of the fixture body 5. The positioning hole at the front end of the distribution sleeve cooperates with the diamond positioning pin 7 of the positioning baffle 1 to prevent the distribution sleeve from rotating. Then the pressure plate 10 is rotated, and the bayonet 14 at one end of the pressure plate 10 is inserted into the hexagon socket screw 9 on one side. The screw 13 is driven to rotate by the screw head 16, and the top plate 15 is placed on the rear end of the distribution sleeve to fix the distribution sleeve to prevent its axial movement. Then the fixture is placed on the drilling machine platform, with the drill sleeve 2 facing upward, and the three inclined holes are drilled separately.

[0036] In summary, the fixture for drilling circumferentially equally divided inclined holes is specially made to solve the problem of conventionally difficult processing of inclined holes opened at equal angles on three circumferences of the distribution sleeve. The fixture is simple and convenient to install the distribution sleeve, and the inclined holes are processed with high precision, which can effectively improve the processing speed and save costs.

[0037] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixture for drilling circumferentially equally divided oblique holes, characterized in that: The invention comprises a clamp body (5), the outer end face of the clamp body (5) is in the shape of a regular hexagon, a receiving hole (12) is provided inside the clamp body, the receiving hole (12) receives a distribution sleeve (11), drill sleeves (2) are arranged at equal angles on the outer end face of the clamp body (5), a positioning baffle (1) is detachably provided on the rear end face of the clamp body (5), a positioning pin is provided on the inner side of the positioning baffle (1), and a pressing and fixing mechanism is detachably provided on the front end of the clamp body (5) for pressing and fixing the distribution sleeve (11).

2. A fixture for drilling circumferentially equally divided oblique holes according to claim 1, characterized in that: The positioning baffle (1) is positioned on the front end surface of the clamp body (5) by means of a cylindrical pin (8), and is then detachably fixed on the front end surface of the clamp body (5) by means of a set of hexagon socket screws (6).

3. The fixture for drilling circumferentially equally divided oblique holes according to claim 1, characterized in that: The positioning pin is a diamond-shaped positioning pin (7), and a positioning hole is provided on the front end surface of the corresponding distribution sleeve (11). When the distribution sleeve (11) is accommodated in the clamp body (5), the positioning hole is adapted to the diamond-shaped positioning pin (7).

4. The fixture for drilling circumferentially equally divided oblique holes according to claim 1, characterized in that: The drill sleeve (2) is fixed on the fixture body (5) by interference fit.

5. The fixture for drilling circumferentially equally divided oblique holes according to claim 1, characterized in that: An inclined block (4) is arranged on the outer end surface of the clamp body (5) between adjacent drill sleeves (2); the inclined block (4) is connected to the outer end surface of the clamp body (5) through a second cylindrical pin (3) and then fixed by electric welding.

6. A fixture for drilling circumferentially equally divided oblique holes according to claim 5, characterized in that: The angle between the drill sleeve (2) and the normal line of the outer end surface of the fixture body (5) is consistent with the angle between the inclined surface of the inclined block (4) and the outer end surface of the fixture body (5).

7. The fixture for drilling circumferentially equally divided oblique holes according to claim 1, characterized in that: The pressing and fixing mechanism comprises a pressing plate (10), a group of hexagon socket screws (9), and a screw (13). The bottom end of the group of hexagon socket screws (9) is arranged on the rear end surface of the clamp body (5). One end of the pressing plate (10) is hinged on one of the hexagon socket screws (9), and the other end is provided with a bayonet (14). A movable buckle is on the other hexagon socket screw (9). An internal thread is provided at the center of the pressing plate (10). The screw (13) is threadedly connected to the center of the pressing plate (10). A top plate (15) is provided at the bottom of the screw (13), and a screw head (16) is provided at the head of the screw (13).

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