A batch head structure for assembling a fuel high-pressure common rail system

Abstract

The utility model provides a kind of for the head structure of fuel high-pressure common rail system assembly, it is suitable for the head structure of internal hexagon bolt head, external hexagon bolt head simultaneously, to reduce the assembly time of high-pressure supply rail, improve the assembly efficiency of fuel high-pressure common rail system.It includes: plug-in column, it is used to and electric tool's connecting head is inserted operation;Connecting convex column, it includes big head body, small head outer convex end, big head body is the connecting end of square structure of longitudinal section, small head outer convex end is the center position of the outermost end of big head body end and the convex hexagonal structure in front;Guide spring;Limit stop cover, it includes a ring cover, a connecting column, a gland, a connecting column is arranged in the center cavity of ring cover, and the gland is integrally formed by being fixed to one end surface of ring cover;And a head, it includes head body, the center of one end of head body is provided with the through square through-hole, the other end of head body is recessed and forms spline groove in center.

Description

Technical Field

[0001] This utility model relates to the technical field of assembly parts for high-pressure common rail fuel systems, specifically a bit structure for assembling high-pressure common rail fuel systems. Background Technology

[0002] The common rail fuel system is a fuel supply system composed of components such as a fuel injection pump, injectors, a fuel rail, and an ECU. A high-pressure fuel pump delivers high-pressure fuel to the fuel rail, precisely controlling the fuel pressure within the rail. The fuel pressure is independent of engine speed, reducing the variation in diesel engine fuel supply pressure with engine speed. Common rail fuel systems are used in diesel-powered buses, trucks, and other powertrains. In this system, the high-pressure fuel rail needs to be installed on the engine to provide a stable fuel pressure at all times. However, because the high-pressure fuel rail is assembled using bolts with different shaped heads, current technology requires constant switching between various socket bits, especially between internal and external hexagonal heads. This makes assembly time-consuming and labor-intensive, requiring a considerable amount of time to complete. Therefore, there is an urgent need to develop a bit structure that can accommodate both internal and external hexagonal bolt heads. Utility Model Content

[0003] To address the aforementioned issues, this invention provides a bit structure for assembling a common rail fuel system. This bit structure is compatible with both internal and external hexagonal bolt heads, thereby reducing the assembly time of the high-pressure rail and improving the assembly efficiency of the common rail fuel system.

[0004] A bit structure for assembling a common rail fuel system, characterized in that it comprises:

[0005] Insert pins are used for interlocking with the connectors of power tools.

[0006] The connecting protrusion includes a large-end body and a small-end protruding end. The large-end body is a connecting end with a square structure in longitudinal section. The small-end protruding end is a regular hexagonal structure that protrudes forward from the center position of the outermost end of the large-end body. The large-end body is also provided with an axial guide groove, which passes through one pair of sides of the large-end body and is arranged along the axial direction.

[0007] Guide spring;

[0008] A limiting stop sleeve includes a ring sleeve, a connecting post, and a pressure cap. A connecting post is arranged in the central cavity of the ring sleeve, and the pressure cap is fixed to one end face of the ring sleeve to form an integral structure.

[0009] And a batch bit, which includes a bit body, a through square hole is provided at the center of one end of the bit body, and a spline groove is formed by recessing the center of the other end of the bit body. The spline groove is adapted to match the external hexagonal bolt head of the corresponding size. The square hole is arranged within the surface area of ​​the spline groove.

[0010] One end of the insert post is fixed to one end of the large-head body. The two ends of the connecting post protrude through the axial guide groove at the corresponding position and are embedded in the corresponding area of ​​the ring sleeve. A guide spring is provided between the insert post and the pressure cap. When the connecting post corresponds to the end of the axial guide groove away from the insert post, the large-head body has a bit mounting portion that protrudes outward from the limiting stop sleeve. The bit mounting portion is used to adapt to the square through hole of the bit body.

[0011] Its further features are:

[0012] The axial length of the guide groove is L, which allows at least a portion of the small-head protrusion to protrude beyond the bit when the guide spring is compressed, ensuring that the forward-protruding regular hexagonal structure of the small-head protrusion is used for the rotation drive of the internal hexagon bolt head.

[0013] The rear end of the insert post is provided with an inner groove hole, which is used to reliably position the connector of the power tool.

[0014] The outer periphery of the insert post is also surrounded by a sealing ring, and the outer periphery of the sealing ring is in close contact with the corresponding ring wall of the power tool to ensure the stable and reliable installation of the entire bit structure;

[0015] The ring and the pressure cap are an integral structure. The ring is provided with a radial through hole. The connecting column passes through the axial guide groove and its two ends are respectively placed at the corresponding positions of the radial through hole of the ring. The fastening sleeve is fitted into the outer ring groove of the ring. The radial through hole is connected to the outer ring groove. The fastening sleeve tightly fixes the connecting column, which ensures the reliable assembly of the limit stop sleeve and the big head body.

[0016] With this invention, the small-head protruding end, a regular hexagonal structure with a forward protrusion at the center of the outermost end relative to the large-head body end, serves as an external hexagonal screwdriver bit. It is adapted to work with internal hexagonal bolt heads. The spline groove of the bit is adapted to the corresponding size of the external hexagonal bolt head. The square through hole is arranged within the surface area of ​​the spline groove. When the external hexagonal screw is tightened, the guide spring is in a normal state; when the internal hexagonal screw is tightened, the guide spring is in a contracted state. This bit structure, which is suitable for both internal and external hexagonal bolt heads, reduces the assembly time of the high-pressure common rail and improves the assembly efficiency of the fuel high-pressure common rail system. Attached Figure Description

[0017] Figure 1This is a three-dimensional structural diagram of the present invention. Figure 1 ;

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention. Figure 2 (Remove the bit);

[0019] Figure 3 This is a schematic diagram of the main view structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the AA cross-section structure of this utility model;

[0021] Figure 5 for Figure 3 A schematic diagram of the structure from below;

[0022] Figure 6 for Figure 3 A top view structural diagram;

[0023] The names corresponding to the serial numbers in the diagram are as follows:

[0024] Insertion post 10, inner groove hole 11, connecting protrusion 20, large head body 21, bit mounting part 211, small head outer protrusion end 22, axial guide groove 23, guide spring 30, limit stop sleeve 40, ring sleeve 41, outer ring groove 411, connecting post 42, pressure cap 43, fastening sleeve 44, bit 50, bit body 51, square through hole 52, spline groove 53, sealing ring 60. Detailed Implementation

[0025] A bit structure for assembling a common rail fuel system, see... Figures 1-6 It includes an insert post 10, a connecting protrusion 20, a guide spring 30, a limit stop sleeve 40, and a batch head 50;

[0026] The insertion post 10 is used for interlocking with the connector of a power tool.

[0027] The connecting protrusion 20 includes a large head body 21 and a small head protruding end 22. The large head body 21 is a connecting end with a square structure in longitudinal section. The small head protruding end 22 is a regular hexagonal structure that protrudes forward relative to the center position of the outermost end of the large head body 21. The large head body 21 is also provided with an axial guide groove 23, which passes through one pair of sides of the large head body and is arranged along the axial direction.

[0028] The limiting stop sleeve 40 includes a ring sleeve 41, a connecting post 42, a pressure cap 43, and a fastening sleeve 44. The connecting post 42 is arranged in the central cavity of the ring sleeve 41. The ring sleeve 41 and the pressure cap 43 are an integral structure. The ring sleeve 41 has a radial through hole. The connecting post 42 passes through the axial guide groove 23, and its two ends are respectively positioned at corresponding positions in the radial through hole of the ring sleeve 41. The fastening sleeve 44 is fitted into the outer annular groove 411 of the ring sleeve 41. The radial through hole connects to the outer annular groove 411. The fastening sleeve 44 tightly fixes the connecting post 42, ensuring reliable assembly of the limiting stop sleeve 40 and the large-head body 21.

[0029] The bit 50 includes a bit body 51. A through square hole 52 is provided at the center of one end of the bit body 51. A spline groove 53 is formed by recessing the center of the other end of the bit body 51. The spline groove 53 is adapted to fit the head of an external hexagonal bolt of the corresponding size. The square hole 52 is arranged within the surface area of ​​the spline groove 53.

[0030] One end of the insert post 10 is fixed to one end of the large head body 21. The two ends of the connecting post 42 protrude through the axial guide groove 23 at the corresponding positions and are embedded in the corresponding area of ​​the ring sleeve 41. A guide spring 30 is provided between the insert post 10 and the pressure cap 43. When the connecting post 42 corresponds to the end of the axial guide groove 23 away from the insert post 10, the large head body 21 has a bit mounting portion 211 that protrudes outward from the limit stop sleeve. The bit mounting portion 211 is used to adapt to the square through hole 52 of the bit body 51.

[0031] In a specific embodiment, the axial guide groove 23 is a waist-shaped hole with an axial length of L. L makes at least a portion of the small-head protruding end 22 protrude outward from the bit 50 when the guide spring 30 is compressed, ensuring that the forward-protruding regular hexagonal structure of the small-head protruding end 22 is used for the rotation drive of the internal hexagon bolt head.

[0032] The rear end of the insertion post 10 is provided with an inner groove hole 11, which is used to reliably position the connector of the power tool.

[0033] A sealing ring 60 is also provided around the outer periphery of the insert post 10. The outer periphery of the sealing ring 60 is in close contact with the corresponding ring wall of the power tool to ensure the stable and reliable installation of the entire bit structure. A limiting post 70 is also sleeved inside the sealing ring to ensure that the inner groove hole 11 and the aligned structure are limited in depth during assembly.

[0034] Its working principle is as follows: The small-head protruding end is a regular hexagonal structure that protrudes forward from the center of the outermost end of the large-head body. It is an external hexagonal screwdriver bit, which is adapted to work with internal hexagonal bolt heads. The spline groove of the bit is adapted to the corresponding size of the external hexagonal bolt head. The square through hole is arranged in the area of ​​the spline groove. When the external hexagonal screw is tightened, the guide spring is in normal state; when the internal hexagonal screw is tightened, the guide spring is in contracted state. It is a bit structure that is suitable for both internal and external hexagonal bolt heads, thereby reducing the assembly time of the high-pressure common rail and improving the assembly efficiency of the fuel high-pressure common rail system.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A socket structure for assembling a high-pressure common rail system of fuel, characterized by, It includes: Insert pins are used for interlocking with the connectors of power tools. The connecting protrusion includes a large-end body and a small-end protruding end. The large-end body is a connecting end with a square structure in longitudinal section. The small-end protruding end is a regular hexagonal structure that protrudes forward from the center position of the outermost end of the large-end body. The large-end body is also provided with an axial guide groove, which passes through one pair of sides of the large-end body and is arranged along the axial direction. Guide spring; A limiting stop sleeve includes a ring sleeve, a connecting post, and a pressure cap. A connecting post is arranged in the central cavity of the ring sleeve, and the pressure cap is fixed to one end face of the ring sleeve to form an integral structure. And a batch bit, which includes a bit body, a through square hole is provided at the center of one end of the bit body, and a spline groove is formed by recessing the center of the other end of the bit body. The spline groove is adapted to match the external hexagonal bolt head of the corresponding size. The square hole is arranged within the surface area of ​​the spline groove. One end of the insert post is fixed to one end of the large-head body. The two ends of the connecting post protrude through the axial guide groove at the corresponding position and are embedded in the corresponding area of ​​the ring sleeve. A guide spring is provided between the insert post and the pressure cap. When the connecting post corresponds to the end of the axial guide groove away from the insert post, the large-head body has a bit mounting portion that protrudes outward from the limiting stop sleeve. The bit mounting portion is used to adapt to the square through hole of the bit body.

2. The bit structure for assembling a high-pressure common rail fuel system according to claim 1, characterized in that: The axial length of the guide groove is L. The length L is such that when the guide spring is compressed, at least a portion of the small-head protruding end protrudes outward from the bit. The forward-protruding regular hexagonal structure of the small-head protruding end is used to drive the rotation of the internal hexagonal bolt head.

3. The bit structure for assembling a high-pressure common rail fuel system according to claim 1, characterized in that: The rear end of the insertion post is provided with an inner groove hole.

4. The bit structure for assembling a common rail fuel system according to claim 3, characterized in that: The outer periphery of the insert post is also surrounded by a sealing ring, and the outer periphery of the sealing ring is in close contact with the corresponding ring wall of the power tool.

5. A bit structure for assembling a common rail fuel system according to claim 1, characterized in that: The ring and the pressure cap are an integral structure. The ring is provided with a radial through hole. After the connecting column passes through the axial guide groove, both ends are respectively placed at the corresponding positions of the radial through hole of the ring. The fastening sleeve is fitted into the outer ring groove of the ring. The radial through hole is connected to the outer ring groove. The fastening sleeve tightly fixes the connecting column.

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