Oil injector body eccentric hole deep hole drilling clamp

Abstract

The utility model provides a deep hole drilling clamp for an eccentric hole of a fuel injector body, which belongs to the technical field of clamps and comprises a supporting flat plate, a strip-shaped guide flat key is arranged at the center of the upper surface of the supporting flat plate, and a positioning disc and a supporting device are respectively arranged on two sides of the guide flat key and on the upper surface of the supporting flat plate. The head end of the oil injector body is matched with the step positioning pin to be fixed to the positioning disc, and the tail end of the oil injector body abuts against and abuts against a machine tool tailstock through an abutting device. According to the utility model, the processing hole site of the oil sprayer body is positioned through the U-shaped positioning block, the supporting cushion block and the step positioning pin, and the processing is convenient, the working procedure is simple and the processing cost is low through the matching of all the structures. Through the arrangement of the clamping device, when the oil sprayer body is subjected to eccentric deep hole machining in the next procedure and the oil sprayer body is placed and taken for positioning, the operation is convenient, simple and reliable, and the production efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamps, in particular to a deep hole drilling clamp for an eccentric hole of a fuel injector body. Background Art

[0002] The existing eccentric hole fixtures related to the injector body generally use the two directional process pin holes processed at the end of the injector body as the orientation for deep hole drilling in the subsequent process, and clamp the injector body for deep hole processing. The two directional process pin holes at the end of the injector body have high position accuracy requirements, high processing difficulty, complex processing procedures, and high processing costs. In addition, when the deep hole processing is performed in the subsequent process, the injector body needs to be aligned with the two directional process holes when it is placed for positioning, which is difficult to operate and has low production efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a deep hole drilling fixture for eccentric holes in an injector body, comprising a supporting plate, a supporting device, a positioning plate and a clamping device, wherein the supporting device and the positioning plate are respectively arranged on opposite sides of the upper surface of the supporting plate, the positioning plate is provided with a step positioning pin, the bottom of the injector body is supported by the supporting device, the head end of the injector body cooperates with the step positioning pin through a preset column groove to realize positioning and fixing with the positioning plate, the tail end of the injector body is connected to one end of the tightening device, and the other end of the tightening device abuts against the tailstock of the machine tool.

[0004] Furthermore, a guide flat key is centrally symmetrically provided on the upper surface of the supporting plate, and a positioning groove is centrally symmetrically provided on the bottom of the positioning plate. The positioning plate is slidably connected to the supporting plate through the cooperation of the positioning groove and the guide flat key.

[0005] Furthermore, the supporting device includes a U-shaped positioning block and a supporting pad, and the supporting pad is arranged between the U-shaped positioning block and the positioning plate;

[0006] The top of the U-shaped positioning block is concave with a U-shaped notch, and the outer periphery of the injector body is provided with a stepped surface. The injector body determines the corresponding position and direction of the eccentric hole through the cooperation between the stepped surface and the U-shaped notch;

[0007] The bottom of the U-shaped positioning block and the supporting pad are both provided with sliding grooves, and are both slidably connected to the upper surface of the supporting plate through the sliding grooves and the guide flat keys.

[0008] Furthermore, the U-shaped positioning block is also provided with a waist-shaped groove-type fixing hole, and the U-shaped positioning block is fixed to the supporting plate through the waist-shaped groove-type fixing hole and the fastener.

[0009] Furthermore, the tightening device includes a tightening shaft seat, a tightening sleeve and an elastic member. The tail end of the tightening shaft seat abuts against the tailstock of the machine tool, the head end is arranged on the inner periphery of the tail end of the tightening sleeve, the head end of the tightening sleeve abuts against the tail end of the injector, and the elastic member is arranged between the tightening shaft seat and the tightening sleeve.

[0010] Furthermore, a central shaft extending toward the interior of the tightening shaft seat is integrally provided inside the tightening sleeve, an elastic retaining ring is clamped on the outer periphery of the end of the central shaft, and a slot for clamping the elastic retaining ring is provided inside the tightening shaft seat. The tightening shaft seat is connected to the tightening sleeve through the elastic retaining ring and the slot.

[0011] Furthermore, a drill guide sleeve for guiding the movement of the drill bit is provided at the center of the positioning disk.

[0012] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in:

[0013] 1. The utility model preliminarily realizes the positioning of the injector body clamping through the column groove and the step positioning pin, improves the processing accuracy of the deep hole drilling of the eccentric hole of the injector body, and improves the clamping efficiency.

[0014] 2. The utility model adopts the design of preventing the workpiece from being placed upside down by using the stepped surface on the outer periphery of the injector body itself in combination with the U-shaped positioning block and the middle support pad. The corresponding positioning reference accuracy requirement is lower, the processing is more convenient, the process is simpler, and the processing cost is lower.

[0015] 3. The utility model makes positioning simple, operation convenient and reliable, and production efficiency high when processing the injector body through the mutual cooperation of the step positioning pin, the step surface, the U-shaped positioning block and the supporting pad. It makes up for the defects and shortcomings of the traditional method, avoids the influence of the complex structure of the injector body, and solves the problem of eccentric deep hole processing of the injector body, thereby greatly saving the production cost of related eccentric deep hole processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural diagram of a deep hole drilling fixture for an eccentric hole in an injector body according to the utility model.

[0017] Figure 2 This is a top view of the structure of a deep hole drilling fixture for an eccentric hole in an injector body according to the utility model.

[0018] Figure 3 for Figure 2 Schematic diagram of the BB cross-section structure.

[0019] Among them, 1. Support plate; 2. Positioning plate; 3. Injector body; 4. U-shaped positioning block; 5. Support pad; 6. Guide flat key; 7. Clamping shaft seat; 8. Clamping sleeve; 9. Rectangular compression spring; 10. Elastic retaining ring; 11. Waist-shaped groove fixing hole; 12. Column groove; 13. Step positioning pin; 14. Drill guide sleeve. DETAILED DESCRIPTION

[0020] The following is a more detailed description of a deep hole drilling fixture for an eccentric hole in an injector body of the present invention in conjunction with a schematic diagram, which shows a preferred embodiment of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as being widely known to those skilled in the art and not as a limitation to the present invention.

[0021] like Figure 1-3 As shown, a deep hole drilling fixture for eccentric holes in injector bodies comprises a supporting plate 1, a positioning plate 2, a tightening device, and a supporting device, wherein the supporting plate 1 is fixed to the upper surface of the machine tool track, and on its upper surface, the positioning plate 2 is placed on one side and the supporting device is placed on the other side. The workpiece to be processed, i.e., the injector body 3, is placed above the supporting device, one end of which is abutted and fixed with the positioning plate 2, and the other end is abutted and fixed with the tailstock of the machine tool through the tightening device.

[0022] Specifically, a strip-shaped guide key 6 is provided symmetrically at the center of the support plate 1, functioning like a guide rail. In conjunction with this, a positioning slot is provided symmetrically at the bottom center of the positioning plate 2. The positioning plate slides onto the guide key 6 through the slot, achieving a sliding connection with the support plate 1 and positioning. A drill guide sleeve 14 is provided at the center of the positioning plate 2 to guide the drill bit's movement and improve the accuracy of eccentric hole machining. Located below the drill guide sleeve 14, the positioning plate 2 is also equipped with a stepped locating pin 13. In conjunction with this, an inwardly recessed column slot 12 is provided at the head end of the injector body 3. The cooperation between the column slot 12 and the stepped locating pin 13 achieves initial positioning of the eccentric hole.

[0023] Similar to the positioning plate 2 described above, the support device includes a U-shaped positioning block 4 and a support pad 5. Both the support pad 5 and the U-shaped positioning block 4 are provided with a sliding groove at their bottoms, and are slidably mounted on the support plate 1 by means of a guide key 6 in conjunction with the groove. The top of the U-shaped positioning block 4 is provided with a U-shaped notch facing inward. The U-shaped notch mates with a stepped surface on the outer periphery of the injector body. The present invention provides two stepped surfaces, which are positioned opposite each other on the outer periphery of the injector body 3. When an eccentric hole in the injector body 3 is required, the stepped surface of the injector body 3 mates with the U-shaped notch to determine the corresponding position and orientation for machining the eccentric deep hole in the injector body 3. Furthermore, the U-shaped positioning block 4 is provided with a waist-shaped groove-type fixing hole 11, which can be adjusted left and right along the guide key 6 according to the different positions of the stepped surface on both sides of the middle portion of the injector body 3. The support pad 5 is designed to vary the distance between the column slot 12 at the head end of the injector body 3 and the outer wall thickness of the injector body, preventing the injector body 3 from being placed upside down.

[0024] The tightening device includes a tightening shaft seat 7, a tightening sleeve 8 and an elastic member, wherein the tail end of the tightening shaft seat 7 abuts against the tailstock of the machine tool, the head end is arranged on the outer periphery of the tail end of the tightening sleeve 8, the head end of the tightening sleeve 8 abuts against the tail end of the injector body 3, and the elastic member is arranged between the tightening shaft seat 7 and the tightening sleeve 8. The elastic member of the utility model is a rectangular compression spring 9.

[0025] Furthermore, a central axis extending toward the tightening shaft seat 7 is integrally provided inside the tightening sleeve 8, and the central axis extends into the tightening shaft seat 7. An elastic retaining ring 10 is clamped on the outer periphery of the tightening shaft seat 7 through a slot. The interior of the tightening shaft seat 7 is also provided with a slot in cooperation with the elastic retaining ring 10. The tightening sleeve 8 is connected to the tightening shaft seat 7 through the elastic retaining ring 10 and the two slots, so that the tightening sleeve 8 will not fall out of the tightening shaft seat when the rectangular compression spring 9 is in a free state under the restriction of the elastic retaining ring 10.

[0026] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any way. Any person skilled in the art who, without departing from the scope of the present invention, makes any equivalent substitution, modification, or other variation to the technical solution and technical content disclosed herein shall be deemed to fall within the scope of the present invention and remain within the scope of protection of the present invention.

Claims

1. A deep hole drilling fixture for eccentric holes in injector bodies, characterized in that: It includes a supporting plate, a supporting device, a positioning plate and a tightening device. The supporting device and the positioning plate are respectively arranged on opposite sides of the upper surface of the supporting plate. The positioning plate is provided with a step positioning pin. The bottom of the injector body is supported by the supporting device. Its head end cooperates with the step positioning pin through a preset column groove to achieve positioning and fixation with the positioning plate. Its tail end is connected to one end of the tightening device, and the other end of the tightening device abuts against the tailstock of the machine tool.

2. The deep hole drilling fixture for eccentric holes in the injector body according to claim 1, characterized in that: The upper surface of the supporting plate is centrally symmetrically provided with guide flat keys, and the bottom of the positioning plate is centrally symmetrically provided with positioning grooves. The positioning plate is slidably connected to the supporting plate through the cooperation of the positioning grooves and the guide flat keys.

3. The deep hole drilling fixture for eccentric holes in the injector body according to claim 2, characterized in that: The supporting device includes a U-shaped positioning block and a supporting pad, and the supporting pad is arranged between the U-shaped positioning block and the positioning plate; The top of the U-shaped positioning block is concave with a U-shaped notch, and the outer periphery of the injector body is provided with a stepped plane. The injector body determines the corresponding position direction of the eccentric hole through the cooperation between the stepped plane and the U-shaped notch; The bottoms of the U-shaped positioning block and the supporting pad are both provided with sliding grooves, and are both slidably connected to the upper surface of the supporting plate through the sliding grooves and the guide flat keys.

4. The deep hole drilling fixture for eccentric holes in the injector body according to claim 3, characterized in that: The U-shaped positioning block is further provided with a waist-shaped groove fixing hole, and the U-shaped positioning block is fixed to the supporting plate through the waist-shaped groove fixing hole and fasteners.

5. The deep hole drilling fixture for eccentric holes in the injector body according to claim 1, characterized in that: The tightening device includes a tightening shaft seat, a tightening sleeve and an elastic member. The tail end of the tightening shaft seat abuts against the tailstock of the machine tool, the head end is arranged on the inner periphery of the tail end of the tightening sleeve, the head end of the tightening sleeve abuts against the tail end of the injector, and the elastic member is arranged between the tightening shaft seat and the tightening sleeve.

6. The deep hole drilling fixture for eccentric holes in the injector body according to claim 5, characterized in that: The tightening sleeve is integrally provided with a central shaft extending toward the interior of the tightening shaft seat, an elastic retaining ring is clamped on the outer periphery of the end of the central shaft, and a groove for clamping the elastic retaining ring is provided inside the tightening shaft seat. The tightening shaft seat is connected to the tightening sleeve through the elastic retaining ring and the groove.

7. The deep hole drilling fixture for eccentric holes in the injector body according to claim 1, characterized in that: A drill guide sleeve for guiding the movement of the drill bit is provided at the center of the positioning disk.

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