Auxiliary tool for assembling oil mass control sleeve of multi-cylinder diesel oil injection pump

Abstract

The utility model discloses a multi-cylinder diesel oil injection pump oil mass control sleeve assembly assistive device which comprises a base, at least two oil mass control sleeve installation openings are formed in the front face of the base at intervals along a straight line, and an open structure communicated with the oil mass control sleeve installation openings is formed in the back face of the base. The pressing assembly comprises a pressing plate detachably installed on the back face of the base through a fastener and a rubber pressure transmitting plate clamped between the pressing plate and the base. The step positioning module is composed of a plurality of positioning bodies which are sequentially embedded in the oil mass control sleeve installation openings, and the axial heights of the positioning bodies are arranged in an equal difference progressive increase mode from one end to the other end; the toothed bar positioning mechanism comprises a toothed bar positioning plate which is vertically and fixedly arranged on the side edge of the mounting opening where the highest positioning body is located, and a toothed bar positioning pin which is detachably inserted into the positioning groove and is connected with the toothed bar in a matched mode is arranged at the top of the toothed bar positioning plate. The assembly assistive device has remarkable advantages in the aspects of press fitting, positioning, benchmark providing and the like, the assembly efficiency, precision and yield are improved, the service life is prolonged, and the practicability is high.

Description

Technical Field

[0001] This utility model belongs to the field of fuel injection pump assembly technology, and in particular relates to an assembly tool for a fuel quantity control sleeve of a multi-cylinder diesel fuel injection pump. Background Technology

[0002] As a core component of the diesel engine fuel system, the multi-cylinder diesel injection pump's precise engagement of the fuel quantity control sleeve and the rack directly affects the uniformity and stability of fuel supply to each cylinder. In existing technology, the fuel quantity control sleeve and the rack are linked through a precise tooth meshing structure, thereby accurately regulating the fuel supply to each cylinder.

[0003] Traditional assembly processes primarily rely on operators using hand tools such as tweezers to assemble each cylinder individually. The specific procedure involves the operator first using tweezers to hold a single oil volume control sleeve, visually inspecting and manually adjusting it to align the sleeve's teeth with the toothed rod before pressing it into the pump body. This traditional assembly method has the following significant drawbacks:

[0004] Assembly accuracy is difficult to guarantee: Since it relies entirely on manual alignment, it is easily affected by factors such as the operator's skill level and visual errors, which can lead to deviations in the tooth meshing phase, thereby affecting the fuel supply accuracy of a single cylinder.

[0005] Low assembly efficiency: For multi-cylinder fuel injection pumps (usually 2-6 cylinders), it is necessary to repeatedly perform single-cylinder assembly operations, which is not only time-consuming and labor-intensive, but also results in high labor intensity for workers.

[0006] Poor consistency: The lack of a unified assembly standard and positioning device results in inconsistent assembly quality of each cylinder, making it difficult to guarantee the consistency of fuel supply to each cylinder in the assembly.

[0007] Not suitable for mass production: Under large-scale production conditions, traditional manual assembly methods are difficult to meet production cycle requirements and quality stability cannot be guaranteed.

[0008] Therefore, this utility model designs an auxiliary tool for assembling a fuel quantity control sleeve for a multi-cylinder diesel injection pump. Utility Model Content

[0009] To address the problems existing in the prior art, this utility model provides an auxiliary tool for assembling a fuel quantity control sleeve for a multi-cylinder diesel injection pump.

[0010] This utility model is implemented as follows: a multi-cylinder diesel fuel injection pump fuel quantity control sleeve assembly auxiliary tool, characterized in that it includes:

[0011] The base has at least two oil quantity control sleeve mounting ports arranged in a straight line on its front side, and the back side of the base forms an open structure that communicates with each oil quantity control sleeve mounting port.

[0012] The pressing assembly includes a pressure plate that is detachably mounted on the back of the base by fasteners, and a rubber pressure plate sandwiched between the pressure plate and the base;

[0013] The stepped positioning module consists of several positioning bodies that are sequentially embedded in the installation ports of each oil volume control sleeve. The axial height of each positioning body increases by 2mm from one end to the other.

[0014] The rack positioning mechanism includes a rack positioning plate that is vertically fixed to the side of the mounting port where the highest positioning body is located. The rack positioning plate has a central positioning groove on its top and a rack positioning pin that can be detachably inserted into the positioning groove and connected to the rack.

[0015] More preferably, the positioning body adopts an integrally molded structure, which includes, in sequence along the axial direction, a pump body guide, a positioning body mounting part, and a handle part;

[0016] The top of the pump body guide extends to form an oil quantity control sleeve positioning mandrel. The positioning mandrel is provided with a first limiting plane in the circumference and a second limiting plane is provided on the outer wall of the positioning body mounting part, which are used to limit the circumferential assembly position of the oil quantity control sleeve.

[0017] More preferably, the positioning body mounting part is provided with an annular positioning groove, and the base is provided with a locking hole corresponding to the annular positioning groove, and a locking screw is installed in the locking hole.

[0018] The advantages and technical effects of this utility model are as follows: In the pressing process of the multi-cylinder diesel injection pump fuel quantity control sleeve assembly auxiliary tool, the elastic pressing system of the pressing component utilizes the pressure equalization characteristics of rubber to adapt to the height difference of each cylinder sleeve and avoid damage to parts. The fastener connection facilitates disassembly and maintenance, ensures pressing force while compensating for part tolerances, and improves the assembly yield.

[0019] The stepped positioning module is ingeniously designed, consisting of multiple positioning bodies with progressively increasing axial height. These bodies are independently embedded, allowing for individual fine-tuning of the position of a single cylinder sleeve. They also utilize the height difference to create assembly guidance, enabling the teeth of multiple cylinder sleeves to automatically align with the rack, reducing the traditional manual alignment time by more than 80% and improving assembly efficiency.

[0020] The rack and pinion positioning mechanism provides a precise reference. The rack and pinion positioning plate ensures that the rack and pinion are in the theoretical center position, eliminating angular errors and controlling the meshing phase consistency between the sleeve and rack and pinion within ±0.5°, thus meeting high precision requirements.

[0021] The positioning body is integrally molded, with a three-section layout integrating multiple functions, ensuring structural strength, simplifying the process, and extending service life. The annular positioning groove, in conjunction with the locking hole, allows for fine adjustment of the positioning rotation angle, ensuring perfect alignment of the teeth and improving assembly accuracy and reliability.

[0022] In summary, this assembly fixture has significant advantages in pressing, positioning, and providing reference points, improving assembly efficiency, accuracy, and yield, extending service life, and demonstrating strong practicality. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 yes Figure 1 Sectional view of AA;

[0025] Figure 3 yes Figure 1 BB section view;

[0026] Figure 4 This is a schematic diagram of the positioning body structure;

[0027] Figure 5 yes Figure 4 The left view;

[0028] Figure 6 This is a schematic diagram of the fit between the rack and the oil quantity control sleeve.

[0029] In the diagram: 1. Base; 11. Oil quantity control sleeve mounting port; 12. Locking hole; 2. Pressing assembly; 21. Pressure plate; 22. Rubber pressure plate; 3. Positioning body; 31. Pump body guide; 32. Positioning body mounting part; 33. Handle part; 34. Oil quantity control sleeve positioning mandrel; 35. First limiting plane; 36. Second limiting plane; 37. Annular positioning groove; 38. Locking screw; 4. Gear positioning mechanism; 41. Gear positioning plate; 42. Center positioning groove; 43. Gear positioning pin; 44. Mounting groove; 45. Fastening bolt; 5. Gear; 6. Plunger outer sleeve; 7. Plunger sleeve; 8. Oil quantity control sleeve; 9. Pump body. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0031] Please see Figures 1 to 6 A multi-cylinder diesel injection pump fuel quantity control sleeve assembly tool, characterized in that it comprises:

[0032] The base has at least two oil quantity control sleeve mounting ports arranged in a straight line on its front side, and the back side of the base 1 forms an open structure that communicates with each oil quantity control sleeve mounting port 11.

[0033] The pressing assembly 2 includes a pressure plate 21 detachably mounted on the back of the base via fasteners, and a rubber pressure transmission plate 22 sandwiched between the pressure plate and the base. The detachable pressure plate and the rubber pressure transmission plate form an elastic pressing system. The pressure-equalizing characteristics of the rubber material can adapt to the height difference of each cylinder liner, avoiding damage to parts caused by rigid contact. The fastener connection method facilitates quick disassembly and maintenance. This assembly effectively compensates for part tolerances while ensuring pressing force, thus improving the assembly yield.

[0034] The stepped positioning module consists of several positioning bodies 3 that are sequentially embedded in the mounting ports of each fuel quantity control sleeve. In this embodiment, a four-cylinder diesel injection pump is provided with four positioning bodies. The axial height of each positioning body increases by 2mm from one end to the other. Each positioning body is independently embedded in the mounting port, which can not only finely adjust the position of a single cylinder sleeve, but also naturally form an assembly guide through the height difference, so that the tooth profile of the multi-cylinder fuel quantity control sleeve is automatically aligned with the rack, reducing the traditional manual alignment time by more than 80%.

[0035] The rack positioning mechanism 4 includes a rack positioning plate 41 vertically fixed to the side of the mounting opening where the highest positioning body is located. The rack positioning plate has mounting grooves 44 at both ends, and is fixedly connected to the base via fastening bolts 45 within these grooves. The top of the rack positioning plate has a central positioning groove 42, and a rack positioning pin 43 that can be detachably inserted into the positioning groove and engages with the rack. This establishes a global assembly reference. The central positioning groove design ensures that the rack is always in the theoretically centered position, eliminating visual errors caused by manual alignment, and ensuring proper meshing between the sleeve and the rack, meeting the requirements of high-precision fuel quantity control sleeve systems.

[0036] More preferably, the positioning body 3 adopts an integral molding structure, and includes, in sequence along the axial direction, a pump body guide part 31, a positioning body mounting part 32, and a handle part 33;

[0037] The top of the pump body guide extends to form an oil volume control sleeve positioning mandrel 34. The positioning mandrel is circumferentially provided with a first limiting plane 35 and the outer wall of the positioning body mounting part is provided with a second limiting plane 36, which are used to limit the circumferential assembly position of the oil volume control sleeve. The axial three-section layout realizes the integration of assembly guidance, positioning and fixing and operation control functions, which not only ensures structural strength but also simplifies the manufacturing process. It is particularly suitable for tooling scenarios with high frequency of use and extends the service life of the auxiliary tool.

[0038] Preferably, the mounting part of the positioning body is provided with an annular positioning groove 37, and the base is provided with a locking hole 12 corresponding to the annular positioning groove, in which a locking screw 38 is installed. The annular design is a major highlight, as it allows for fine-tuning of the positioning rotation angle. In actual operation, the positioning angle can be flexibly fine-tuned according to the specific position of the rack and oil volume control sleeve, thereby ensuring perfect alignment of their tooth profiles and effectively improving the accuracy and reliability of assembly.

[0039] How to use

[0040] First, the pump body 9, pre-installed with the rack 5, plunger sleeve 6, plunger sleeve 7, and oil quantity control sleeve 8, is precisely inserted into the corresponding positioning bodies. During actual operation, the four oil quantity control sleeves are then securely placed on the four positioning bodies in sequence. At this point, the fixed flat portion of the oil quantity control sleeve will tightly engage with the first limiting plane, thereby accurately determining the installation angle of the oil quantity control sleeve and ensuring that the installation angle of each cylinder remains consistent, laying the foundation for subsequent high-precision assembly.

[0041] Next, accurately align the rack positioning pin with the opening in the middle of the rack positioning plate and complete the installation smoothly. By utilizing the relative positional relationship between the rack positioning plate and the positioning body, the positional accuracy and consistency of the oil quantity control sleeve and the rack during assembly can be effectively guaranteed, thus avoiding assembly problems caused by positional deviations.

[0042] It is worth mentioning that there is a 2mm height difference between the positioning of each oil quantity control sleeve. This ingenious design has significant advantages, ensuring that only one oil quantity control sleeve engages with the rack at any given time. If there is any obstruction during engagement, the operator can easily rotate the handle to fine-tune the angle of the positioning body. In this way, the risk of interference when four oil quantity control sleeves engage with the rack simultaneously is greatly reduced, improving the smoothness and success rate of assembly.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-cylinder diesel fuel injection pump fuel quantity control sleeve assembly aid characterized by, include: The base has at least two oil quantity control sleeve mounting ports arranged in a straight line on its front side, and the back side of the base forms an open structure that communicates with each oil quantity control sleeve mounting port. The pressing assembly includes a pressure plate that is detachably mounted on the back of the base by fasteners, and a rubber pressure plate sandwiched between the pressure plate and the base; The stepped positioning module consists of several positioning bodies that are sequentially embedded in the installation ports of each oil quantity control sleeve. The axial height of each positioning body increases at an equal arithmetic progression from one end to the other. The rack positioning mechanism includes a rack positioning plate vertically fixed to the side of the mounting port where the highest positioning body is located. The rack positioning plate has a central positioning groove on its top and a rack positioning pin that can be detachably inserted into the positioning groove and connected to the rack.

2. The assembly aid for the fuel quantity control sleeve of a multi-cylinder diesel fuel injection pump according to claim 1, characterized in that The positioning body adopts an integral molding structure, and includes, in sequence along the axial direction, a pump body guide, a positioning body mounting part, and a handle part; The top of the pump body guide extends to form an oil quantity control sleeve positioning mandrel. The positioning mandrel is provided with a first limiting plane in the circumference and a second limiting plane is provided on the outer wall of the positioning body mounting part, which are used to limit the circumferential assembly position of the oil quantity control sleeve.

3. The assembly aid for the fuel quantity control sleeve of a multi-cylinder diesel fuel injection pump according to claim 2, characterized in that: The positioning body mounting part is provided with an annular positioning groove, and the base is provided with a locking hole corresponding to the annular positioning groove, and a locking screw is installed in the locking hole.

4. The assembly aid for the fuel quantity control sleeve of a multi-cylinder diesel fuel injection pump according to claim 1, characterized in that: The axial height of each positioning body increases by 2mm at equal intervals from one end to the other.

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