Gear sleeve pull rod structure of fuel injection pump
By designing a gear sleeve and tie rod structure for the fuel injection pump, the problem of reduced fuel injection volume caused by wear was solved, enabling the recyclability of the gear sleeve and tie rod and reducing replacement costs.
Patent Information
- Application Number
- CN202520646325.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-04-07
AI Technical Summary
After a period of use, the gear sleeve and tie rod of the fuel injection pump wear down, resulting in increased tooth clearance and a "staggered" phenomenon with reduced fuel injection volume. Current technology requires replacing the entire gear sleeve and tie rod, which is costly.
Design a fuel injection pump gear sleeve tie rod structure, wherein the outer gear sleeve meshes with the tie rod, and the outer gear sleeve can be replaced and the tie rod position can be changed after wear. The structure is guided by a guide pin and a guide groove to avoid the need for complete replacement.
By replacing the outer gear sleeve and changing the position of the tie rod, the gear sleeve and tie rod can be reused, saving replacement costs.
Smart Images
Figure CN223938163U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fuel injection pump technical field, specifically point to a fuel injection pump tooth cover pull rod structure. BACKGROUND
[0002] The plunger is installed in the fuel injection pump, the plunger moves up and down in the plunger sleeve, the plunger sleeve is provided with the tooth cover and the pull rod outside, the tooth cover rotates and drives the plunger to rotate, controls the fuel injection amount of the fuel injection pump, since the tooth cover and the pull rod are connected through the tooth, after using for a period of time, the tooth will be worn, the gap between the tooth on the tooth cover and the tooth on the pull rod will appear, which will cause the fuel injection amount to reduce and the "car wandering" phenomenon to appear, at this time, the tooth cover and the pull rod need to be replaced. SUMMARY
[0003] The utility model solves the technical problem that the prior art lacks, and provides a fuel injection pump tooth cover pull rod structure.
[0004] To solve the above technical problems, the utility model adopts the technical scheme of:
[0005] A fuel injection pump tooth cover pull rod structure, including the connecting sleeve, the connecting hole is processed in the connecting sleeve, the connecting head is processed on the connecting sleeve upper end, the outer tooth cover is set on the connecting head outside, the fixed hole that is used for cooperation with the connecting head is processed in the middle of the outer tooth cover, the tooth is processed on the outside of the outer tooth cover, the pressing plate is set on the upper end of the outer tooth cover, the through hole that is used for being passed through with the connecting hole is processed in the middle of the pressing plate, the through hole periphery is fixed on the connecting head through the screw, the pull rod is set on the side of the outer tooth cover, and the tooth is processed on the left and right sides of the pull rod, and the tooth on the pull rod is engaged with the tooth on the outer tooth cover.
[0006] Further, the connecting head is a square head, and the fixed hole is a square hole.
[0007] Further, the guide groove is processed on the upper and lower ends of the pull rod, and the guide pin is arranged in the guide groove.
[0008] Further, the outer hexagonal head and the threaded head are processed on the upper end of the guide pin.
[0009] Further, the recess is processed on the upper end of the outer tooth cover, and the pressing plate and the screw are arranged in the recess.
[0010] Compared with the prior art, the fuel injection pump tooth cover pull rod structure of the utility model can be used again after the tooth cover and the pull rod are replaced and the pull rod is adjusted in position, without replacing the whole set of tooth cover and pull rod, thereby saving the cost. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is the structure schematic diagram of the utility model;
[0012] Among them, 1. connecting sleeve, 2. connecting hole, 3. connecting head, 4. external toothed sleeve, 5. pressure plate, 6. screw, 7. pull rod, 8. guide groove, 9. guide pin, 10. external hexagon head, 11. threaded head. Detailed Implementation
[0013] The technical solutions in the embodiments of this utility model will be clearly and completely described below.
[0014] like Figure 1 As shown, a fuel injection pump gear sleeve tie rod structure includes a connecting sleeve 1, a connecting hole 2 machined inside the connecting sleeve 1, a connecting head 3 machined at the upper end of the connecting sleeve 1, an outer gear sleeve 4 sleeved on the outside of the connecting head 3, and a fixing hole machined in the middle of the outer gear sleeve 4 to mate with the connecting head 3. In this embodiment, the connecting head 3 is a square head, and the fixing hole is a square hole. The square hole mates with the square head to prevent the outer gear sleeve 4 from rotating. The outer side of the outer gear sleeve 4 is machined with teeth. A pressure plate 5 is provided at the upper end of the outer gear sleeve 4. A through hole is machined in the middle of the pressure plate 5, which communicates with the connecting hole 2. The periphery of the through hole is fixed to the connecting head 3 by screws 6. A groove is machined at the upper end of the outer gear sleeve 4. The pressure plate 5 and the screws 6 are placed in the groove to prevent interference with the plunger sleeve.
[0015] The outer toothed sleeve 4 is provided with a pull rod 7 on its side. The pull rod 7 has teeth machined on both its left and right sides. The teeth on the pull rod 7 mesh with the teeth on the outer toothed sleeve 4. After the teeth wear out, the outer toothed sleeve 4 can be replaced and the teeth on the pull rod 7 can be swapped for reuse.
[0016] The upper and lower ends of the pull rod 7 are machined with guide grooves 8, and guide pins 9 are provided in the guide grooves 8. As the teeth on the pull rod 7 wear down, the gap between the pull rod 7 and the pull rod hole increases. In order to prevent the pull rod 7 from shaking, the pull rod 7 is guided by the guide pins 9 and the guide grooves 8.
[0017] The guide pin 9 has an external hexagonal head 10 and a threaded head 11 machined on its upper end. The guide pin 9 is installed at the opening of the tie rod hole through the threaded head 11.
[0018] This utility model is not limited to the embodiments described. Those skilled in the art can still make some modifications or changes without departing from the spirit and scope of this utility model. Therefore, the scope of protection of this utility model shall be determined by the scope defined in the claims.
Claims
1. A fuel injection pump gear sleeve tie rod structure, characterized in that: The device includes a connecting sleeve with a connecting hole machined inside. A connecting head is machined at the upper end of the connecting sleeve. An outer toothed sleeve is fitted on the outside of the connecting head. A fixing hole that mates with the connecting head is machined in the middle of the outer toothed sleeve. Teeth are machined on the outer side of the outer toothed sleeve. A pressure plate is provided at the upper end of the outer toothed sleeve. A through hole that communicates with the connecting hole is machined in the middle of the pressure plate. The periphery of the through hole is fixed to the connecting head by screws. A pull rod is provided on the side of the outer toothed sleeve. Teeth are machined on both the left and right sides of the pull rod. The teeth on the pull rod mesh with the teeth on the outer toothed sleeve.
2. The fuel injection pump gear sleeve tie rod structure according to claim 1, characterized in that: The connector is a square head, and the fixing hole is a square hole.
3. The fuel injection pump gear sleeve tie rod structure according to claim 1, characterized in that: The upper and lower ends of the pull rod are machined with guide grooves, and guide pins are installed in the guide grooves.
4. The fuel injection pump gear sleeve tie rod structure according to claim 3, characterized in that: The upper end of the guide pin is machined with an external hexagonal head and a threaded head.
5. The fuel injection pump gear sleeve tie rod structure according to claim 1, characterized in that: The upper end of the outer toothed sleeve is machined with a groove, and the pressure plate and screw are set in the groove.