CN-224200745-U - Pump body locating pin

Abstract

The utility model provides a pump body positioning pin, which is protected by changing original all-steel into outer nylon, so that the defect caused by collision is avoided, and the assembly yield of a pump body is improved. The self-locking type self-locking nut is suitable for positioning and mounting of a step hole, wherein the step hole comprises an upper small-diameter hole and a bottom large-diameter hole, and comprises a fixedly connected bottom which is of a cylinder structure, a concave thread positioning hole is formed in the bottom of the cylinder structure, a middle connecting end, a top hollow sleeve, a nylon protective sleeve and a nylon protective gland, and the nylon protective gland comprises a cover end and a rod end.

Inventors

• Qiu Tiankai

Assignees

• 苏州电中燃油喷射科技有限公司

Dates

Publication Date

20260505

Application Date

20250619

Claims (6)

1. 1. The utility model provides a pump body locating pin, its location installation that is adapted to the step hole, the step hole includes upper portion path hole, bottom major diameter hole, its characterized in that includes: The bottom is fixedly connected and is of a column structure, and a concave thread positioning hole is formed in the bottom of the column structure; the middle connecting end; A top hollow sleeve; A nylon protective sleeve; And a nylon protective gland comprising a gland end and a rod end; The center of the upper part of the fixedly connected bottom is provided with an upward convex middle connecting end, the upper part of the middle connecting end is provided with an upward convex top hollow sleeve, the top opening of the top hollow sleeve is internally provided with a cavity, the nylon protective sleeve is sleeved on the outer circumference of the middle connecting end, the rod end is inserted into the cavity, the cover end cover is arranged on the upper surface of the top hollow sleeve, the equivalent diameter of the cover end is the diameter of the small diameter hole at the upper part to be inserted into the step hole, the equivalent diameter of the nylon protective sleeve is the diameter of the large diameter hole at the bottom to be inserted into the step hole, and the height of the nylon protective sleeve is equal to the height of the large diameter hole at the bottom.
2. 2. The pump body positioning pin according to claim 1, wherein the middle connecting end is a step column and comprises an upper large-diameter cylindrical connecting end and a lower small-diameter cylindrical connecting end, the height of the small-diameter cylindrical connecting end is not more than half of the height of the upper large-diameter cylindrical connecting end, the inner diameter of the nylon protective sleeve is equal to the outer diameter of the upper large-diameter cylindrical connecting end, the height of the nylon protective sleeve is equal to the sum of the height of the upper large-diameter cylindrical connecting end and the height of the lower small-diameter cylindrical connecting end, and a part of space is reserved at the bottom of the nylon protective sleeve sleeved on the outer periphery of the middle connecting end and can be embedded into a gap formed by the small-diameter cylindrical connecting end.
3. 3. The pump body positioning pin according to claim 2, wherein the bottom inner ring of the nylon protective sleeve is provided with a bottom-up guiding conical surface.
4. 4. The pump body positioning pin according to claim 1, wherein the top hollow sleeve is a cylindrical sleeve, the rod end is a cylindrical rod end, the cover end is a round cover end, the outer edge of the thickness of the round cover end comprises a guiding conical surface flaring from top to bottom, the bottom circular surface of the round cover end completely covers the upper outer circular surface of the cylindrical sleeve, and the cylindrical rod end is inserted into the inner cavity of the cylindrical sleeve.
5. 5. The pump body positioning pin according to claim 1, wherein when the top hollow sleeve only comprises two upper convex rib plates, the upper surfaces of the two upper convex rib plates are flush, the inner cavities of the two upper convex rib plates form an equivalent column cavity, the rod end comprises a pair of circular arc edges and obtuse angle edges on two sides in a overlooking state, the rod end is inserted into the equivalent column cavity, the obtuse angle edges on two sides are exposed, and the cover end covers the area formed by the top hollow sleeve and the rod end.
6. 6. The pump body positioning pin according to claim 1, wherein the outer edge of the thickness of the cover end comprises a guiding conical surface flaring from top to bottom.

Description

Pump body locating pin Technical Field The utility model relates to the technical field of pump body installation components, in particular to a pump body positioning pin. Background The HP0 fuel injection pump is one of the important core components of the fuel injection system. The HP0 pump has high requirements on the surface processing of the bottom counter bore, and can cause poor assembly of parts and leakage of different degrees under the condition of poor sand holes, bruise and the like, the positioning pin of the existing bottom counter bore is made of steel, the HP0 pump is made of aluminum alloy, and collision (see figure 1) can be generated in the installation process, so that the defects such as surface pits and bulges are caused, and the positioning pin of the clamp needs to be redesigned to prevent the defects. Disclosure of utility model Aiming at the problems, the utility model provides the pump body locating pin, which is protected by changing the original all-steel into outer nylon, so that the defect caused by collision is avoided, and the assembly yield of the pump body is improved. The utility model provides a pump body locating pin, its location installation that is adapted to the step hole, the step hole includes upper portion path hole, bottom major diameter hole, its characterized in that includes: The bottom is fixedly connected and is of a column structure, and a concave thread positioning hole is formed in the bottom of the column structure; the middle connecting end; A top hollow sleeve; A nylon protective sleeve; And a nylon protective gland comprising a gland end and a rod end; The center of the upper part of the fixedly connected bottom is provided with an upward convex middle connecting end, the upper part of the middle connecting end is provided with an upward convex top hollow sleeve, the top opening of the top hollow sleeve is internally provided with a cavity, the nylon protective sleeve is sleeved on the outer circumference of the middle connecting end, the rod end is inserted into the cavity, the cover end cover is arranged on the upper surface of the top hollow sleeve, the equivalent diameter of the cover end is the diameter of the small diameter hole at the upper part to be inserted into the step hole, the equivalent diameter of the nylon protective sleeve is the diameter of the large diameter hole at the bottom to be inserted into the step hole, and the height of the nylon protective sleeve is equal to the height of the large diameter hole at the bottom. It is further characterized by: The middle connecting end is a step column and comprises an upper large-diameter cylindrical connecting end and a lower small-diameter cylindrical connecting end, the height of the small-diameter cylindrical connecting end is not more than half of the height of the upper large-diameter cylindrical connecting end, the inner diameter of the nylon protective sleeve is equal to the outer diameter of the upper large-diameter cylindrical connecting end, the height of the nylon protective sleeve is equal to the sum of the height of the upper large-diameter cylindrical connecting end and the height of the lower small-diameter cylindrical connecting end, and a part of space is reserved at the bottom of the nylon protective sleeve sleeved on the outer periphery of the middle connecting end and can be embedded into a gap formed by the small-diameter cylindrical connecting end, so that the nylon protective sleeve is fast and convenient to assemble; the bottom inner ring of the nylon protective sleeve is provided with a guiding conical surface from bottom to top, which ensures reliable and rapid assembly of the nylon protective sleeve; the top hollow sleeve is a cylindrical sleeve, the rod end is a cylindrical rod end at the moment, the cover end is a circular cover end, the outer edge of the thickness of the circular cover end comprises a guiding conical surface flaring from top to bottom, the bottom circular surface of the circular cover end completely covers the upper outer circular surface of the cylindrical sleeve, and the cylindrical rod end is inserted into the inner cavity of the cylindrical sleeve; When the top hollow sleeve only comprises two upper convex rib plates, the upper surfaces of the two upper convex rib plates are flush, the inner cavities of the two upper convex rib plates form equivalent column cavities, the rod end comprises a pair of circular arc edges and obtuse angle edges at two sides in a overlooking state, the rod end is inserted into the equivalent column cavities, the obtuse angle edges at two sides are exposed, and the cover end covers the area formed by the top hollow sleeve and the rod end, so that the raw material cost of the positioning pin is reduced; the outer edge of the thickness of the cover end comprises a guiding conical surface flaring from top to bottom. After the utility model is adopted, the equivalent diameter of the cover end is the diameter of the